JP4927500B2 - Automatic shift transmission - Google Patents

Description

  The present invention relates to an automatic shift transmission, and more particularly to an automatic shift transmission that shifts power from an engine and transmits the power to a drive shaft.

Conventionally, as this type of automatic shift transmission, a shift operation mechanism that performs a shift operation of a transmission mechanism, a select actuator that operates the shift operation mechanism in a select direction, and a shift actuator that operates a shift operation mechanism in a shift direction And performing automatic shift by driving and controlling a select actuator and a shift actuator based on a shift instruction.
In this automatic shift transmission, by setting the driving force of the shift actuator based on the shift stroke position, the synchronous rotation speed difference, and the gear ratio, the shift time from the start of the shift to the end of the shift is always made the same. Yes.
JP 2002-147590 A

  In such an automatic shift transmission, when shifting from one shift speed to another, the shift actuator is driven to release the gear, and then the select actuator is driven to select the shift speed to be geared in. To drive in again. That is, in the automatic shift transmission described above, although the shift time can always be the same, the shift actuator is driven twice intermittently, so that not only the shift time is lengthened but also the control is complicated. It becomes.

  The automatic shift transmission according to the present invention has an object to shorten the shift time. Another object of the automatic shift transmission of the present invention is to simplify the control during shifting.

  The automatic shift transmission of the present invention employs the following means in order to achieve at least a part of the above-described object.

A first automatic shift transmission of the present invention is an automatic shift transmission that shifts power from an engine and transmits it to a drive shaft.
A plurality of shift stages capable of transmitting the power to the drive shaft with different speed ratios;
A plurality of switching means capable of switching at least one of the plurality of shift speeds between a shift state and a neutral state;
A lever member selectively engageable with any one of the plurality of switching means;
A shift shaft carrying the lever member;
In the selecting direction for selecting one of said plurality of switching means, and select actuator capable of driving said lever member,
A shift actuator capable of driving the lever member in a shift direction so that the selected switching means is switched;
When the lever member cannot be driven in the select direction, and when the lever member is driven in the select direction by the select actuator, the lever member waits in a state waiting for driving in the select direction and the select member Standby drive means for driving the lever member in the select direction when driving in the direction becomes possible;
Equipped with a,
The standby driving means has a second lever member connected to the lever member via an elastic means, and the elastic means is driven when the select actuator is driven when the lever member cannot be driven in the select direction. The lever member is placed in the drive waiting state by driving only the second lever member in the select direction against the elastic force of
The elastic means has an engaging portion that engages with the second lever member and is provided so as to be relatively movable with respect to the lever member; and a spring means that applies an elastic force to the engaging member. And means having
The gist of the invention is that the spring means is a means for urging the engaging member in the axial direction of the shift shaft with respect to the lever member .

In the first automatic shift transmission according to the present invention, when the lever member cannot be driven in the select direction and is driven in the select direction by the select actuator, the lever member is kept waiting for driving in the select direction. Since the lever member can be driven in the select direction when it is allowed to stand by and can be driven in the select direction, the lever member is driven to the shift stage driven in the shift direction by the shift actuator. When switching to another gear position, the lever member is driven in the select direction by the select actuator and waits in the drive waiting state in the select direction, and the lever member in the drive waiting state is driven in the shift direction by the shift actuator. Thus, the lever member can be driven in the select direction. In other words, it is possible to shift from one shift stage to another shift stage by driving the select actuator and the shift actuator only once. As a result, the shift time can be shortened. In addition, since it is not necessary to drive the shift actuator intermittently, control during shifting can be simplified.
In addition, the lever member can be easily put on standby in a drive waiting state. Moreover, when the lever member can be driven in the select direction, the lever member can be driven in the select direction by the force when the elastic means is released, so that the lever member is driven in the select direction only by the select actuator. The lever member can be driven in the select direction in a short time compared to the one. As a result, the shift time can be shortened.
Further, when the lever member cannot be driven in the select direction, the second lever member only drives the engaging member in the select direction against the elastic force of the spring means, so the lever member is driven with a simple configuration. It can be in a waiting state.
Further, since the engaging member is merely urged in the axial direction with respect to the lever member, the drive waiting state can be achieved with a simple configuration.

In the first automatic shift transmission of the present invention having the spring means, the spring means moves the engaging member in the select direction when the drive force in the select direction by the select actuator is released. It can also be a means capable of returning to the initial position before the driving force is applied.
In this way, when the driving force in the select direction is released, the second lever member can be returned to the position before the driving force in the select direction acts, that is, the initial position.
In this aspect of the automatic shift transmission according to the present invention, the standby drive means can return the lever member to the initial position when the drive force in the select direction by the select actuator is released. It can also be a means having a spring means.
In this way, when the driving force in the selection direction is released, the lever member can be returned to the position before the driving force in the selection direction acts, that is, the initial position. Therefore, since it is not necessary to drive the select actuator to return the lever member to the initial position, the control at the time of shifting can be facilitated.

In this aspect of the automatic shift transmission of the present invention, the lever member may be slidably supported in the axial direction with respect to the shift shaft.
By so doing, only the lever member has to be slid in the axial direction when selecting, so that the sliding space can be reduced as compared with a structure in which the entire shift shaft is slid.

In the first automatic shift transmission of the present invention having the second spring means, the second spring means is means for urging the lever member in the axial direction with respect to the shift shaft. You can also
In this way, the lever member can be returned to the initial position with a simple configuration.

A second automatic shift transmission according to the present invention includes a first power transmission path that transmits power from an engine to a first gear through a first clutch and transmits the power to a drive shaft, and power from the engine. An automatic shift transmission including a second power transmission path that shifts to a second speed through a second clutch and transmits the second speed to the drive shaft;
A first switching means capable of switching the first power transmission path between a power transmission enabled state and a power transmission disabled state by switching the first shift speed between a shift state and a neutral state;
Second switching means capable of switching the second power transmission path between a power transmission enabled state and a power transmission disabled state by switching the second shift speed between a gear shift state and a neutral state;
A first shift lever member selectively engaged with the first switching means;
A second shift lever member that selectively engages with the second switching means;
A select actuator capable of driving the first shift lever member or the second shift lever member in a select direction for selecting the first switching means or the second switching means;
A shift actuator capable of driving the selected first shift lever member or the selected second shift lever member in a shift direction;
When the first gear lever is driven in the select direction by the select actuator when the first gear lever member cannot be driven in the select direction, the first gear lever member is A first standby driving means for waiting in the state of waiting for driving in the select direction and driving the first gear lever member in the select direction when driving in the select direction becomes possible;
When the second gear lever member is driven in the select direction by the select actuator when the second gear lever member cannot be driven in the select direction, the second gear lever member is Second standby drive means for waiting in the select direction drive waiting state and driving the second shift lever member in the select direction when driving in the select direction becomes possible;
Equipped with a,
The first standby drive means has a first gear stage second lever member connected to the first gear stage lever member via first elastic means, and the first gear stage lever member is the select gear member. When the select actuator is driven when it cannot be driven in the direction, only the first gear shift second lever member is driven in the select direction against the elastic force of the first elastic means. Means for placing the first shift lever member in the drive waiting state;
The second standby drive means has a second gear stage second lever member connected to the second gear stage lever member via a second elastic means, and the second gear stage lever member is the select gear. When the select actuator is driven when it cannot be driven in the direction, the second lever member for the second gear stage is driven only in the select direction against the elastic force of the second elastic means. The gist of the invention is that the two-shift lever member is placed in the drive waiting state .

In the second automatic shift transmission of the present invention, when the first shift lever member and the second shift lever member are not driven in the select direction and are driven in the select direction by the select actuator. The first shift lever member and the second shift lever member are kept waiting in the select direction drive waiting state, and when the first shift lever member is ready to be driven in the select direction, Since the two-speed-stage lever member can be driven in the select direction, the first-speed-stage lever member and the second-speed-stage lever member are shifted to the gear stage that is driven in the shift direction by the shift actuator. When switching from one gear to another, the select actuator drives the first gear lever member and the second gear lever member in the select direction. The first gear stage lever member and the second gear stage lever member in the drive waiting state are driven in the shift direction by the shift actuator, so that the first gear lever member is driven. And the second shift lever member can be driven in the select direction. That is, it is possible to shift from one gear to another gear by driving the select actuator and the shift actuator only once. As a result, the shift time can be shortened. In addition, since it is not necessary to drive the shift actuator intermittently, control during shifting can be simplified. Here, the first gear may be an even gear and the second gear may be an odd gear.
In addition, the first gear stage lever member and the second gear stage lever member can be easily put on standby in a drive waiting state. In addition, when the first gear lever member and the second gear lever member can be driven in the select direction, the first gear member is used for the first gear member by the force when the first elastic member or the second elastic member is released. Since the lever member and the second gear stage lever member can be driven in the select direction, the lever member for the first gear stage and the second gear lever member can be driven in the select direction using only the select actuator. Thus, the first shift lever member and the second shift lever member can be driven in the select direction in a short time. As a result, the shift time can be shortened.

In this aspect of the second automatic shift transmission according to the present invention, the first elastic means has a first engagement portion that engages with the second lever member for the first gear and the first gear. And a third spring means for applying an elastic force to the first engagement member. The second elastic means includes: A second engagement member that has a second engagement portion that engages with the second gear step second lever member and that is movable relative to the second gear step lever member; It may be a means having a fourth spring means for applying an elastic force to the engaging member.
In this way, when the first gear lever member or the second gear lever member cannot be driven in the select direction, the first gear second lever member or the second gear second lever member is the second gear member. Since only the first engagement member and the second engagement member are driven in the select direction against the elastic force of the 3 spring means and the fourth spring means, the first shift lever member and the second The two-speed stage lever member can be put in a drive waiting state.

In the second automatic shift transmission according to the present invention having the third spring means and the fourth spring means, the third spring means releases the driving force in the select direction by the select actuator. The first engagement member can return the first engaging member to the initial position before the driving force in the select direction is applied, and the fourth spring means has a driving force in the select direction by the select actuator. When released, the second engagement member may be a means capable of returning to the initial position before the driving force in the select direction is applied.
In this way, when the driving force in the select direction is released, the position before the driving force in the select direction is applied to the second lever member for the first gear and the second lever member for the second gear, that is, It can be returned to the initial position.
In the second automatic shift transmission according to this aspect of the present invention, the first standby driving means moves the first shift lever member when the driving force in the select direction by the select actuator is released. A second spring driving means capable of returning to the initial position, wherein the second standby driving means moves the second shift lever member when the driving force in the select direction by the select actuator is released; It can also be a means having a sixth spring means capable of returning to the initial position.
In this way, when the driving force in the select direction is released, the first gear lever member and the second gear lever member are returned to the positions before the driving force in the select direction is applied, that is, the initial position. be able to. Therefore, it is not necessary to drive the select actuator to return the first gear lever member or the second gear lever member to the initial position, so that the control at the time of shifting can be facilitated.

In the second automatic shift transmission according to the present invention having the third spring means and the fourth spring means, the first shift shaft carrying the first gear lever member and the second gear. A second shift shaft that carries a lever member, the select direction is an axial direction of the first shift shaft and the second shift shaft, and the third spring means includes the first engagement member. The fourth spring means is a means for urging the first gear lever member in the axial direction, and the fourth spring means pushes the second engagement member with respect to the second gear lever member in the axial direction. It can also be a means for energizing.
In this way, the first engagement member and the second engagement member are merely urged in the axial direction with respect to the first shift lever member and the second shift lever member, so that the drive waiting state can be achieved with a simple configuration. Can be achieved.
In this aspect of the second automatic shift transmission of the present invention, the first shift lever member and the second shift lever member are respectively connected to the first shift shaft and the second shift shaft. It can be slidably supported in the axial direction.
In this way, when selecting, only the first shift lever member and the second shift lever member need to slide in the axial direction. The moving space can be kept small.

In the automatic shift transmission according to the present invention having the fifth spring means and the sixth spring means, the fifth spring means is configured such that the first shift lever member moves the shaft with respect to the first shift shaft. The sixth spring means may be means for urging the second shift lever member in the axial direction with respect to the second shift shaft.
If it carries out like this, the lever member for 1st speed steps and the lever member for 2nd speed steps can be returned to an initial position by simple structure.

In the second automatic shift transmission according to the present invention, the first engagement portion may be configured such that the first shift portion second lever is in a state where the first switching means is shifted to the selected first shift step. The second engagement portion is formed so that the member can be returned to the neutral state in the shift direction, and the second engagement portion is configured to shift the second shift means while shifting the second switching means to the selected second gear. The second lever member for steps may be formed so as to be returned to the neutral state in the shift direction.
If it carries out like this, the 2nd lever member for 1st gear stages and the 2nd gear stage will be in the state which shifted the 1st switching means and the 2nd switching means to the selected 1st gear stage and the selected 2nd gear stage. Since the second lever member can be returned to the neutral state in the shift direction, when the so-called preshift is performed, the engagement between the first gear shift second lever member and the first engagement portion of the first engagement member After the engagement between the second lever member for the second gear stage and the second engaging portion of the second engaging member is once released, the second lever member for the first gear stage or the second lever member for the second gear stage. There is no need to return to the neutral state in the shift direction. As a result, a space for returning the first gear stage second lever member and the second gear stage second lever member to the neutral state in the shift direction is not required, and the transmission itself can be made compact. In addition, the second lever member for the first gear and the first engaging portion of the first engaging member, or the second lever member for the second gear and the second engaging portion of the second engaging member, Since the operation for releasing the engagement is not necessary, the shift time can be shortened and the control during the shift can be simplified. Here, the neutral state in the shift direction refers to the second lever member for the first gear and the second gear for the second gear when the first switching means and the second switching means are not shifted to any gear. It means the state of 2 lever members.

In the second automatic shift transmission of the present invention, the first gear second lever member and the second gear second lever member may be integrally formed. .
By so doing, the first gear stage second lever member and the second gear stage second lever member can be made into one component, so that an increase in the number of parts can be prevented.

  Next, the best mode for carrying out the present invention will be described using examples.

FIG. 1 is a schematic configuration diagram showing an outline of a configuration of an automatic shift transmission 10 according to a first embodiment of the present invention.
As shown in the figure, the automatic shift transmission 10 of the first embodiment is connected to an input shaft 24 via a dry clutch 22, an input shaft 24 connected to the dry clutch 22, and a speed change mechanism TM. An output shaft 26 connected to the differential gear 32 via the output gear GO and a speed change operation mechanism 50 that performs a speed change operation of the speed change mechanism TM are provided.

The speed change mechanism TM includes a drive gear G that is arranged so as to be rotatable integrally with the input shaft 24, a driven gear G ′ that is arranged so as to be free to rotate on an output shaft 26 that meshes with the drive gear G, and an output shaft 26. It is comprised from the synchronizer S arrange | positioned so that integral rotation is possible.
The drive gear G is arranged in order of the first speed drive gear G1, the second speed drive gear G2, the third speed drive gear G3, and the reverse drive gear GR from the clutch 22 side, and the driven gear G ′ is the first speed drive gear G1,2. Corresponding to the high-speed drive gear G2, the 3-speed drive gear G3, and the reverse drive gear GR, the 1-speed driven gear G1 ′, the 2-speed driven gear G2 ′, the 3-speed driven gear G3 ′, and the reverse driven gear GR ′ Arranged in order. The reverse drive gear GR meshes with the reverse driven gear GR ′ via a reverse idler gear GRI arranged on a reverse idler shaft 28 arranged in parallel with the input shaft 24 and the output shaft 26, and outputs The rotation of the shaft 26 is reversed and transmitted to the differential gear 32.

  The synchronizer S includes a first and second speed synchronizer S1 disposed between the first speed driven gear G1 ′ and the second speed driven gear G2 ′, a third speed driven gear G3 ′, and a reverse driven gear GR. 3 and a reverse speed synchronizer S2 disposed between the first and second speed driven gears G1 'and G2 by moving the coupling sleeves CS1 and CS2 in the axial direction. ', 3rd speed driven gear G3', and reverse driven gear GR 'are selectively fixed to the output shaft 26.

FIG. 2 is a configuration diagram showing details of the configuration of the speed change operation mechanism 50.
As shown in the figure, the speed change operation mechanism 50 includes an actuator 72 connected via shift mechanisms 60 to shift forks F1 and F2 engaged with the coupling sleeves CS1 and CS2, respectively, and an operation rod 74 in the axial direction. A sliding operation is performed to select one of the shift forks F1, F2, and the coupling rods CS1, CS2 are axially moved via the shift forks F1, F2 selected by rotating the operation rod 74. Perform a shift operation to move to. The shift operation to each gear stage is performed by the selection operation and the shift operation.

  The waiting mechanism 60 is disposed so as to be perpendicular to the input shaft 24 and the output shaft 26 and to be fixed to the cases 1a and 1b and to be movable and rotatable in the axial direction on the rod 62. The lever member 64 includes a lever member 64 and a bracket member 67 that is coaxially disposed on the outer periphery of the lever member 64 so as to be movable in the axial direction and non-rotatable with respect to the lever member 64.

The lever member 64 includes a cylindrical cylindrical portion 65 formed of a large-diameter portion 65a and a small-diameter portion 65b, and a lever portion 66 formed to protrude from the outer peripheral surface of the large-diameter portion 65a. As the roller 65 slides on the rod 62 in the axial direction, the lever portion 66 is selectively connected to shift brackets Fs1, Fs2 formed integrally with the boss portions Fb1, Fb2 of the shift forks F1, F2.
A spring 82 is arranged between the end face 65b 'on the small diameter part 65b side and the case 1a in the axial end face of the cylindrical part 65 so that the end face 65a' on the large diameter part 65a side contacts the case 1b. The member 64 is urged in the axial direction. That is, the spring 82 urges the lever member 64 so that the lever portion 66 is normally connected to the shift bracket Fs1 of the shift fork F1 for the first and second speeds, so that the lever member 64 is returned to the initial position. It functions as a select return spring.
Further, a ring member R that is movable in the axial direction on the small diameter portion 65b is disposed on the outer peripheral surface of the small diameter portion 65b, and the ring member R is an outer periphery of the small diameter portion 65b on the side of the ring member R and the end surface 65b ′. It is urged in the axial direction so as to come into contact with the stepped portion 65a ″ by a spring 84 disposed between the snap ring SR locked to the surface.

3 is an arrow view of FIG. 2 viewed from the direction of arrow V.
2 and 3, the bracket member 67 has a substantially C-shaped cross-section boss portion 68 having a notch 68 a along the axial direction, and an engagement formed to protrude from the outer peripheral surface of the boss portion 68. The lever portion 66 is fitted into the notch 68a, and the operation lever 76 fixedly disposed on the operation rod 74 is engaged and connected to the engagement portion 69.
The axial length of the boss portion 68 is formed to be the same as the axial length of the large-diameter portion 65a of the cylindrical portion 65 of the lever member 64, and one axial end face 68 ′ contacts the ring member R. ing. Further, a flange portion 68b is formed on the outer periphery of the boss portion 68, and a spring 86 is disposed between the flange portion 68b and the case 1a. That is, the spring 86 urges the boss portion 68 in the axial direction so that the other axial end face 68 ″ of the boss portion 68 abuts the case 1b, and a select for returning the bracket member 67 to the initial position. Functions as a return spring.
The engaging portion 69 is formed with an opening recess 69b having an opening on the end surface 69 'side on the case 1b side with the bottom surface 69a as the bottom surface, and the engaging portion 69 abuts the operation lever 76 in the axial direction only on the bottom surface 69a. .
The spring 84 is set to a load that can return the lever member 64 to the initial position, and is set to be larger than the load of the spring 82 in the set state (the state shown in FIG. 2). The spring 86 is set to a load that can return the bracket member 67 to the initial position.

Next, the operation of the automatic shift transmission 10 of the embodiment configured as described above, particularly the operation at the time of shifting operation will be described.
FIG. 4 is a schematic diagram schematically showing the neutral state of the speed change operation mechanism 50. First, the shifting operation when shifting from the neutral state to the first gear will be described.
In the neutral state, as shown in FIG. 2, the lever member 64 and the bracket member 67 are in a state in which the end surface 65a ′ and the axial end surface 68 ″ are in contact with the case 1b, and the lever portion 66 is in the shift bracket Fs1. It is in the state connected to.
When there is a shift request from the above state to the first gear, the actuator 72 is driven in the shift direction. When the actuator 72 is driven in the shift direction, the operation lever 76 is rotated through the operation rod 74, the bracket member 67 is rotated through the engaging portion 69, and the lever member 64 is moved through the notch 68a. Rotate. As the lever member 64 rotates, the shift fork F1 moves in the axial direction by the lever portion 66 via the shift bracket Fs1 (upward in FIG. 4).
As a result, the coupling sleeve CS1 moves in the axial direction (leftward in FIG. 1), the first-speed driven gear G1 ′ is fixed to the output shaft 26, and the shift operation to the first gear is completed.

In the shift from the first gear to the second gear, the actuator 72 is driven in the shift direction opposite to the shift from the neutral state to the first gear. That is, the operation lever 76 is rotated via the operation rod 74 in the direction opposite to that when shifting from the neutral state to the first gear.
As a result, the bracket member 67 rotates through the engagement portion 69 in the opposite direction to that when shifting from the neutral state to the first gear, and the lever member 64 moves from the neutral state to the first speed through the notch 68a. It rotates in the opposite direction to that when shifting to a stage.
As the lever member 64 rotates, the shift fork F1 moves in the axial direction in the opposite direction to that when shifting from the neutral state to the first gear through the shift bracket Fs1 by the lever portion 66 (downward in FIG. 4). ).
As a result, the coupling sleeve CS1 moves in the axial direction in the opposite direction to that when shifting from the neutral state to the first gear (rightward in FIG. 1), to the output shaft 26 of the first-speed driven gear G1 ′. Is released and the second-speed driven gear G2 ′ is fixed to the output shaft 26, and the shift operation to the second gear is completed.

Next, the shift operation when shifting from the second speed to the third speed will be described.
FIG. 5 is a schematic diagram schematically showing a state in which the lever portion 66 is shifted to the second speed stage, and FIG. 6 is a side view of the shift bracket Fs2 side by the actuator 72 in a state in which the lever member 64 is shifted to the second speed stage. FIG. 7 is a state diagram showing the state of the speed change operation mechanism 50 when the lever portion 66 is selected to the shift bracket Fs2 side. .
When there is a shift request from the second speed to the third speed, the actuator 72 is driven in the select direction and driven in the shift direction. That is, the connection of the lever portion 66 is changed from the shift bracket Fs1 to the shift bracket Fs2, and the shift fork F2 is moved in the axial direction by the lever portion 66 via the shift bracket Fs2, thereby moving the coupling sleeve CS2 in the axial direction. Moving (leftward in FIG. 1), the third speed driven gear G3 ′ is fixed to the output shaft 26 and shifted to the third speed.

When the actuator 72 is driven in the select direction and the operation lever 76 moves in the axial direction via the operation rod 74 (rightward in FIG. 6), the operation lever 76 moves axially toward the bracket member 67 via the engaging portion 69. The force of acts. At this time, as shown in FIG. 5, the lever member 64 is in a state in which the lever portion 66 is shifted to the second speed, and the lever portion 66 abuts against the wall portion Fs2 ′ of the shift bracket Fs2 in the axial direction. As shown in FIG. 6, the bracket member 67 moves axially on the outer peripheral surface of the lever member 64 with the ring member R while contracting the springs 84 and 86 as shown in FIG. 6 in the right direction). That is, the lever member 64 is placed in a select waiting state in a state where a force for moving in the axial direction is stored.
In this state, when the actuator 72 is driven in the shift direction and the operation lever 76 is rotated via the operation rod 74, the bracket member 67 is rotated via the engaging portion 69 and the lever member is connected via the notch 68a. 64 rotates while maintaining the selection waiting state. As the lever member 64 rotates, the lever portion 66 moves the shift fork F1 in the axial direction via the shift bracket Fs1 (upward in FIG. 5), and the lever portion 66 can move to the shift bracket Fs2 side. That is, when the shift fork F1 moves to a state where the engagement recess Fsc1 of the shift bracket Fs1 and the engagement recess Fsc2 of the shift bracket Fs2 match (FIG. 4), there is no obstacle to the axial movement of the lever member 64. Thus, the contraction of the spring 84 is released, and the lever member 64 is instantaneously moved in the axial direction by the spring force of the spring 84 (to the right in FIG. 7), and as shown in FIG. 7, the lever portion 66 is moved to the shift bracket Fs2. Connecting. At this time, since the load of the spring 84 is larger than the load of the spring 82, the lever member 64 moves in the axial direction while contracting the spring 82. Then, the shift fork F2 is moved in the axial direction by the lever portion 66 via the shift bracket Fs2, whereby the coupling sleeve CS2 is moved in the axial direction (left direction in FIG. 1), and the third speed driven gear. G3 ′ is fixed to the output shaft 26, and the shift operation to the third gear is completed.

The shift from the third gear to the second gear is basically the same as the gear shift operation when shifting from the second gear to the third gear.
FIG. 8 is a schematic view schematically showing a state where the lever portion 66 is shifted to the third speed stage, and FIG. 9 is a diagram showing a state where the lever member 64 is shifted to the third speed stage and the actuator 72 moves the shift bracket Fs1 side. FIG. 10 is a state diagram showing the state of the speed change operation mechanism 50 when the lever portion 66 is selected to the shift bracket Fs1 side. .
When there is a shift request from the third speed to the second speed, the actuator 72 is driven in the select direction and driven in the shift direction. That is, the connection of the lever portion 66 is changed from the shift bracket Fs2 to the shift bracket Fs1, and the shift fork F1 is moved in the axial direction by the lever portion 66 via the shift bracket Fs1, thereby moving the coupling sleeve CS1 in the axial direction. It moves (rightward in FIG. 1), and the second speed driven gear G2 ′ is fixed to the output shaft 26 to shift to the second speed.

When the actuator 72 is driven in the select direction and the operation lever 76 moves in the axial direction via the operation rod 74 (left direction in FIG. 9), the contraction of the spring 86 is released as shown in FIG. 67 follows the axial movement of the operating lever 76 by the spring force of the spring 86, moves in the axial direction, and the axial end face 68 ″ contacts the case 1b. That is, the bracket member 67 is returned to the initial position by the function of the spring 86 as a select return spring. At this time, as shown in FIG. 8, the lever member 64 is in a state in which the lever portion 66 is shifted to the third speed, and the lever portion 66 abuts against the wall portion Fs1 ′ of the shift bracket Fs1 in the axial direction. Therefore, only the bracket member 67 moves in the axial direction on the outer peripheral surface of the lever member 64 (left direction in FIG. 9). That is, the lever member 64 is placed in a select waiting state in a state where a force for movement in the axial direction is stored by the function of the spring 82 as a select return spring.
In this state, when the actuator 72 is driven in the shift direction and the operation lever 76 is rotated via the operation rod 74, the bracket member 67 is rotated via the engaging portion 69 and the lever member is connected via the notch 68a. 64 rotates while maintaining the selection waiting state. As the lever member 64 rotates, the lever fork F2 moves in the axial direction via the shift bracket Fs2 by the lever 66 (downward in FIG. 8), and the lever 66 can move toward the shift bracket Fs1. That is, when the shift fork F1 moves to a state where the engagement recess Fsc2 of the shift bracket Fs2 and the engagement recess Fsc1 of the shift bracket Fs1 coincide with each other, there is no obstacle preventing the lever member 64 from moving in the axial direction. The contraction is released, and the lever member 64 is instantaneously moved in the axial direction by the spring force of the spring 82 (leftward in FIG. 10), and the lever portion 66 is connected to the shift bracket Fs1 as shown in FIG. Then, the shift fork F1 is moved in the axial direction by the lever portion 66 via the shift bracket Fs1, and thereby the coupling sleeve CS1 is moved in the axial direction (right direction in FIG. 1). G2 ′ is fixed to the output shaft 26, and the shifting operation to the second gear is completed.

  Note that the shift from the second gear to the first gear is a shift from the neutral state to the first gear, the shift from the first gear to the reverse gear is a shift from the second gear to the third gear, and the reverse gear is 1 Since the shift to the high speed is basically the same as the shift from the third speed to the second speed, detailed description thereof is omitted to avoid duplication.

  According to the automatic shift transmission 10 of the first embodiment described above, since the selection operation by the actuator 72 is held in the selection waiting state by the waiting mechanism 60, the shift operation and the selection operation of the actuator 72 are each performed once. You can shift just by As a result, the shift time can be shortened. In addition, since it is not necessary to perform the shift operation of the actuator 72 intermittently, the control at the time of shifting can be simplified. In addition, the lever member 64 is placed in the selection waiting state in the state where the force for movement in the axial direction is stored by the spring force of the springs 82, 84, 86, so that the lever member 64 moves in the selection direction. When there is no obstacle and the lever member 64 moves in the selection direction, the selection operation is instantaneously performed by the spring force of the springs 82, 84, 86. As a result, the shift time can be further shortened.

Next, an automatic shift transmission 100 as a second embodiment of the present invention will be described.
FIG. 11 is a schematic configuration diagram showing an outline of a configuration of an automatic shift transmission 100 as a second embodiment of the present invention.
As shown in the drawing, the automatic shift transmission 100 of the second embodiment is illustrated via a first clutch CL1 and a first input shaft 124 connected to a crankshaft of an engine (not shown) and a second clutch CL2. Connected to the crankshaft of the engine that is not connected, and is connected to the first input shaft 124 and the second input shaft 125 via the speed change mechanism TM, and the second input shaft 125 coaxially fitted to the first input shaft 124. The output shaft 126 and a speed change operation mechanism 150 that performs a speed change operation of the speed change mechanism TM are provided.

  The speed change mechanism TM includes a drive gear G disposed so as to be integrally rotatable with the first input shaft 124 and the second input shaft 125, and a driven gear G disposed so as to be freely rotatable on an output shaft 126 meshing with the drive gear G. 'And a synchronizer s arranged so as to be rotatable together with the output shaft 126.

The drive gear G is disposed on the first input shaft 124 in a fixed manner, such as a first speed drive gear G1, a reverse drive gear GR, a third speed drive gear G3, a fifth speed drive gear G5, and a second input shaft 125. The second-speed drive gear G2, the fourth-speed drive gear G4, and the sixth-speed drive gear G6 are configured from the side where the first clutch CL1 and the second clutch CL2 are disposed (hereinafter referred to as the unit front side). 2nd speed drive gear G2, 4th speed drive gear G4, 6th speed drive gear G6, 5th speed drive gear G5, 3rd speed drive gear G3, 1st speed drive gear G1, reverse drive gear GR are arranged in this order.
The driven gear G ′ corresponds to the driving gear G from the unit front side of the output shaft 126 from the second speed driven gear G2 ′, the fourth speed driven gear G4 ′, the sixth speed driven gear G6 ′, and the fifth speed. The driven gear G5 ′, the third speed driven gear G3 ′, the first speed driven gear G1 ′, and the reverse driven gear GR ′ are arranged in this order.
The reverse drive gear GR is connected to the reverse driven gear GR via a reverse idler gear GRI arranged on a reverse idler shaft 128 arranged in parallel with the first input shaft 124, the second input shaft 125, and the output shaft 126. ', And the rotation of the output shaft 126 is reversed and transmitted to a drive shaft (not shown).

The synchronizer s includes a 1-reverse speed synchronizer s1 disposed between the first-speed driven gear G1 ′ and the reverse driven gear GR ′, a third-speed driven gear G3 ′, and a fifth-speed driven gear G5. A third- and fifth-speed synchronizer s2 disposed between and a sixth-speed synchronized device s3 disposed between a sixth-speed driven gear G6 ′ and a fourth-speed driven gear G4 ′; The second and fourth speed synchronizer s4 is disposed between the driven gear G2 'and the fourth speed driven gear G4', and the coupling sleeve cs1 of each of the synchronizers s1, s2, s3, and s4. , Cs2, cs3, cs4 are moved in the axial direction to move the first speed driven gear G1 ′, the second speed driven gear G2 ′, the third speed driven gear G3 ′, the fourth speed driven gear G4 ′, and the fifth speed driven gear. G5 ′, 6-speed driven gear G6 ′, and reverse driven gear GR ′ are selectively fixed to the output shaft 126.
That is, the synchronizers s1 and s2 shift the power from the engine (not shown) to the odd gear and the reverse gear via the first clutch CL1 so that the power can be transmitted to the axle (not shown). Is a state in which the power from the engine (not shown) can be shifted to the even-numbered speed stage via the second clutch CL2 and transmitted to the axle (not shown).

  The speed change operation mechanism 150 includes an actuator 172 connected via shift mechanism 160 to shift forks f1, f2, f3, and f4 that engage with coupling sleeves cs1, cs2, cs3, and cs4, respectively. A selection operation is performed in which one of the shift forks f1, f2, f3, and f4 is selected by sliding in the axial direction, and the operation rod 174 is rotated to select the shift forks f1, f2, f3, and f4. The coupling sleeve cs1, cs2, cs3, cs4 is shifted in the axial direction. The shift operation to each gear stage is performed by the selection operation and the shift operation.

FIG. 12 is a detailed configuration diagram showing details of the configuration of the waiting mechanism 160.
As shown in the figure, the waiting mechanism 160 includes an odd-speed stage waiting mechanism 160a that connects the shift forks f1 and f2 for shifting to the odd-numbered speed stage and the reverse speed and the actuator 172, and a speed-change mechanism for shifting to the even-numbered speed stage. The shift fork f3, f4 and the actuator 172 are connected to each other and an even speed stage waiting mechanism 160b.
The odd speed waiting mechanism 160a is a rod 162a fixed to the cases 100a and 100b so as to be perpendicular to the input shaft 124 and the output shaft 126, and is movable and rotatable in the axial direction on the rod 162a. And a bracket member 167a coaxially disposed on the outer periphery of the lever member 164a so as to be axially movable and non-rotatable with respect to the lever member 164a. The waiting mechanism 160b is disposed so that the rod 162b is fixed to the cases 100a and 100b so as to be perpendicular to the input shaft 124 and the output shaft 126, and the rod 162b is movable and rotatable in the axial direction. Lever member 164b, and lever member that is movable in the axial direction and non-rotatable with respect to the lever member 164b And a bracket member 167b which is coaxially disposed on the outer circumference of 64b.

The lever members 164a, 164b are cylindrical cylindrical portions 165a, 165b composed of large diameter portions 165a ′, 165b ′ and small diameter portions 165a ″, 165b ″, and outer circumferences of the large diameter portions 165a ′, 165b ′. Lever portions 166a and 166b are formed so as to protrude from the surface, and the cylindrical portion 165a slides in the axial direction on the rod 162a, so that the lever portion 166a becomes the boss portions fb1 and fb2 of the shift forks f1 and f2. The shift brackets 165b are selectively connected to the integrally formed shift brackets fs1 and fs2, and the lever 166b is integrally formed with the bosses fb3 and fb4 of the shift forks f3 and f4 as the cylindrical portion 165b slides on the rod 162b in the axial direction. The shift brackets fs3 and fs4 are selectively connected.
A spring 182a is disposed between the end surface 1165a '' on the small diameter portion 165a '' side of the axial end surface of the cylindrical portion 165a and the case 100b, and the end surface 1165a 'on the large diameter portion 165a' side serves as the snap ring a. The lever member 164a is urged in the axial direction so as to abut. A spring 182b is disposed between the end surface 1165b '' on the small diameter portion 165b '' side of the cylindrical end portion 165b and the case 100a, and the end surface 1165b 'on the large diameter portion 165b' side is a snap ring. The lever member 164b is urged in the axial direction so as to abut against b. That is, the spring 182a biases the lever member 164a so that the lever portion 166a is normally connected to the shift bracket fs1 of the shift fork f1 for first speed / reverse, so that the lever member 164a is returned to the initial position. The spring 182b biases the lever member 164b so that the lever portion 166b is normally connected to the shift bracket fs4 of the shift fork f4 for 2nd and 4th speed, and the lever member 164b It functions as a select return spring for returning to the initial position.
Further, ring members Ra and Rb that are movable in the axial direction on the small diameter portions 165a '' and 165b '' are arranged on the outer peripheral surfaces of the small diameter portions 165a '' and 165b ''. The springs 184a disposed between the ring members Ra, Rb and the snap rings SRa, SRb locked to the outer peripheral surfaces of the small diameter portions 165a '', 165b '' on the end faces 1165a '', 1165b '' side. It is urged | biased by the axial direction so that it may contact | abut to level | step-difference part 1265a, 1265b by 184b.

13 is an arrow view of FIG. 12 viewed from the direction of arrow W.
As shown in FIGS. 12 and 13, the bracket members 167a and 167b include boss portions 168a and 168b having substantially C-shaped cross sections having notches 168a ′ and 168b ′ along the axial direction, and the boss portions 168a and 168b. The engaging portions 169a and 169b are formed so as to protrude from the outer peripheral surface, and the lever portions 166a and 166b are fitted to the notches 168a ′ and 168b ′, and the operating rod 174 is fitted to the engaging portions 169a and 169b. The lever portions 176a and 176b of the operation lever 176 fixedly disposed in the are engaged with each other.
The lever portions 176a and 176b are integrally formed to extend in opposite directions (with a 180 ° phase shift) to both axial end surfaces of the cylindrical boss portion 177 fixed to the operation rod 174. The axial length of the cylindrical boss portion 177 is such that when one of the lever portions 176a and 176b is engaged with the engaging portions 169a and 169b, the other is the engaging portion 169a and 169b. Is set to a length that does not engage.

The axial lengths of the boss portions 168a and 168b are the same as the axial lengths of the large diameter portions 165a ′ and 165b ′ of the cylindrical portions 165a and 165b of the lever members 164a and 164b. End faces 1168a and 1168b are in contact with the ring members Ra and Rb. A flange portion 168a ″ is formed on the outer periphery of the boss portion 168a, and a spring 186a is disposed between the flange portion 168a ″ and the case 100b. Further, a flange portion 168b ″ is formed on the outer periphery of the boss portion 168b, and a spring 186b is disposed between the flange portion 168b ″ and the case 100a. That is, the springs 186a and 186b urge the boss portions 168a and 168b in the axial direction so that the other axial end surfaces 1268a and 1268b of the boss portions 168a and 168b abut against the snap rings a and b, respectively. It functions as a select return spring for returning the members 167a and 167b to the initial position.
The springs 184a and 184b are set to have loads that can return the lever members 164a and 164b to their initial positions, and are set to be larger than the loads of the springs 182a and 182b in the set state (the state shown in FIG. 12). ing. Further, the springs 186a and 186b are set to loads that can return the bracket members 167a and 167b to their initial positions.

  The engaging portion 169a is formed with a bottomed opening recessed portion 169a '' having a bottom surface 1169a opened on the end surface 169a 'side on the case 100a side, and the engaging portion 169a contacts the lever portion 176a in the axial direction only at the bottom surface 1169a. Touch. Further, the engaging portion 169b is formed with a bottomed opening recessed portion 169b ″ having a bottom surface 1169b opened on the end surface 169b ′ side on the case 100b side, and the engaging portion 169b is axially aligned with the lever portion 176b only on the bottom surface 1169b. Abut. That is, when the operating rod 174 is moved to the case 100b side, the lever portion 176a engages with the engaging portion 169a, and the lever portion 176b is disengaged from the engaging portion 169b. When moved to the 100a side, the lever portion 176a is disengaged from the engaging portion 169a, and the lever portion 176b is engaged with the engaging portion 169b.

  Further, as shown in FIG. 13, the engaging widths of the engaging portions 169a and 169b that are engaged when the lever portions 176a and 176b are rotated by the rotation of the operation rod 174 are such that the lever portions 176a and 176b are engaged with the engaging portions 169a. , 169b from the initial state where no contact is made in the engagement width direction, the lever portions 176a, 176b are rotated to rotate any of the bracket members 167a, 167b, and then the lever portions 176a, 176b are returned to the initial state again. The lever portions 176a and 176b are formed wider than the lever widths of the lever portions 176a and 176b so that the lever portions 176a and 176b do not come into contact with each other in the engagement width direction of the engagement portions 169a and 169b. That is, only the lever portions 176a and 176b can be returned to the initial positions while the bracket members 167a and 167b are rotated.

Next, the operation of the automatic shift transmission 100 of the embodiment configured as described above, particularly the operation at the time of shifting operation will be described.
In the initial state immediately after the engine is started, the speed change operation mechanism 150 is in the state shown in FIG. 12, that is, the lever member 164a and the bracket member 167a abut the end surface 1165a ′ and the axial end surface 1268a on the snap ring a. Is connected to the shift bracket fs1, and the lever member 164b and the bracket member 167b abut the end surface 1165b ′ and the axial end surface 1268b on the snap ring b, and the lever portion 166b is connected to the shift bracket fs4. The lever portion 176a of the operation lever 176 is engaged with the engaging portion 169a of the bracket member 167a.

FIG. 14 is a schematic diagram schematically showing the connection relationship between the shift brackets fs1, fs2, fs3, and fs4 and the lever portions 166a and 166b when a start request is made.
When there is a start request from the initial state, as shown in FIG. 14, the shift bracket fs1 is moved to the first speed side (lower side in the figure) by the lever portion 166a. That is, by driving the actuator 172 in the shift direction and rotating the lever portion 176a of the operation lever 176 via the operation rod 174, the bracket member 167a is rotated via the engaging portion 169a, and the notch portion 168a ′. Through which the lever member 164a rotates. As the lever member 164a rotates, the lever portion 166a moves the shift fork f1 in the axial direction via the shift bracket fs1, and the coupling sleeve cs1 moves in the axial direction (leftward in FIG. 11). The first speed driven gear G1 ′ is fixed to the output shaft 126, and the shift operation to the first gear is completed.

When the shift to the first gear is completed, the gear to be requested next is estimated, and a shift operation to that gear, that is, a pre-shift operation is performed. In the embodiment, the estimated shift speed is described as the second speed. Note that the operation of estimating the gear position to be requested next is not described in detail because it does not form the core of the present invention. As shown in FIG. 14, the pre-shift operation to the second gear is performed by moving the shift bracket fs4 to the second gear (upper side in the drawing) by the lever portion 166b.
That is, the lever portion 176a of the operation lever 176 that is rotated so that the shift bracket fs1 moves to the first gear side is rotated until it returns to the initial state, and the actuator 172 is driven in the select direction via the operation rod 174. Then, the operating lever 176 is moved in the axial direction (left direction in FIG. 12) to release the engagement between the lever portion 176a and the engaging portion 169a and engage the lever portion 176b and the engaging portion 169b. Next, by driving the actuator 172 in the shift direction and rotating the lever portion 176b of the operating lever 176 via the operating rod 174, the bracket member 167b is rotated via the engaging portion 169b and the notch portion 168b ′. Then, the lever member 164b is rotated. As the lever member 164b rotates, the lever portion 166b moves the shift fork f4 in the axial direction via the shift bracket fs4 and moves the coupling sleeve cs4 in the axial direction (leftward in FIG. 11). The second speed driven gear G2 ′ is fixed to the output shaft 126, and the shift operation to the second speed stage is completed.
Thus, during the pre-shift operation to the second gear, the lever portion 176a can be returned to the initial state while maintaining the engagement between the lever portion 176a and the engaging portion 169a. The shift time can be shortened as compared with the case where the engagement with the joint portion 169a is once released and then the lever portion 176a is returned to the initial state. Further, since it is not necessary to provide a separate space for returning the lever portion 176a to the initial state, it is possible to prevent the transmission itself from becoming large.

When the shift operation to the first gear and the preshift operation to the second gear are completed, the first clutch CL1 is engaged to shift the power from the engine (not shown) to the first gear to the axle (not shown). introduce. When there is a shift request from the first gear to the second gear, the first clutch CL1 and the second clutch CL2 are exchanged to shift the power from the engine (not shown) to the second gear and the axle (not shown). )).
In this way, when the state is switched to the power transmission state by the second gear, a gear to be requested next is estimated, and a pre-shift operation to that gear is performed. In the embodiment, the shift stage estimated at this time will be described as the third speed stage. FIG. 15 is a state diagram showing the state of the speed change operation mechanism 150 during the pre-shift operation to the third gear, and FIG. 16 shows that the lever portion 166a is selected to the shift bracket Fs2 side during the pre-shift operation to the third gear. It is a state figure which shows the state of the speed change operation mechanism 150 at the time.

  When there is a pre-shift request to the third speed stage, the actuator 172 is driven in the select direction and driven in the shift direction. That is, the connection of the lever portion 166a is changed from the shift bracket fs1 to the shift bracket fs2, and the shift fork f2 is moved in the axial direction via the shift bracket fs2 by the lever portion 166a, thereby moving the coupling sleeve cs2 in the axial direction. By moving (rightward in FIG. 11), the third speed driven gear G3 ′ is fixed to the output shaft 126, and a preshift operation to the third speed stage is performed.

When the actuator 172 is driven in the select direction and the lever portion 176a of the operation lever 176 moves in the axial direction via the operation rod 174 (right direction in FIG. 15), the bracket member is engaged by the lever portion 176a via the engagement portion 169a. An axial force acts on 167a. At this time, as shown in FIG. 14, the lever member 164a is in a state in which the lever portion 166a is shifted to the first speed stage, and the lever portion 166a abuts against the wall portion fs2 ′ of the shift bracket fs2 in the axial direction. As shown in FIG. 15, the bracket member 167a moves in the axial direction on the outer peripheral surface of the lever member 164a with the ring member Ra while contracting the springs 184a, 186a (see FIG. 15). 15 right direction). That is, the lever member 164a is placed in a select waiting state in a state where a force for movement in the axial direction is stored.
In this state, when the actuator 172 is driven in the shift direction and the lever portion 176a of the operation lever 176 is rotated via the operation rod 174, the bracket member 167a is rotated via the engaging portion 169a and the notch portion 168a ′. Then, the lever member 164a rotates while maintaining the select waiting state.
As the lever member 164a rotates, the lever portion 166a moves the shift fork f1 in the axial direction via the shift bracket fs1 (upward in FIG. 14), and the lever portion 166a can move to the shift bracket fs2 side. That is, when the shift fork f1 is moved to a state where the engagement recess fsc1 of the shift bracket fs1 and the engagement recess fsc2 of the shift bracket fs2 are matched, there is no obstacle to the axial movement of the lever member 164a. The contraction is released, and the lever member 164a is instantaneously moved in the axial direction by the spring force of the spring 184a (rightward in FIG. 15), and as shown in FIG. 16, the lever portion 166a is connected to the shift bracket fs2. At this time, since the load of the spring 184a is larger than the load of the spring 182a, the lever member 164a moves in the axial direction while contracting the spring 182a. Then, the shift fork f2 is moved in the axial direction by the lever portion 166a via the shift bracket fs2, and thereby the coupling sleeve cs2 is moved in the axial direction (right direction in FIG. 11). G3 ′ is fixed to the output shaft 126, and the preshift operation to the third gear is completed. Then, by switching the clutch from the second clutch CL2 to the first clutch CL1, the power from the engine is changed from the second gear to the third gear and transmitted to the axle (not shown).

  Next, when downshifting, for example, when the clutch is switched from the first clutch CL1 to the second clutch CL2 and the power transmission state by the third gear is switched to the power transmission state by the second gear. Think. When the power transmission state by the third gear is switched to the power transmission state by the second gear, the next gear to be requested is estimated, and a preshift operation to that gear is performed. In the embodiment, the shift stage estimated at this time will be described as the first speed stage. FIG. 17 is a state diagram showing the state of the speed change operation mechanism 150 when the power transmission state by the third gear is switched to the power transmission state by the second gear, and FIG. 18 shows a pre-shift request to the first gear. It is the schematic diagram which showed typically the connection relationship of shift bracket fs1, fs2, fs3, fs4 and lever part 166a, 166b at the time.

  When the power transmission state by the third speed stage is switched to the power transmission state by the second speed stage, the operation lever 176 is disengaged from the lever portion 176a and the engaging portion 169a as shown in FIG. Thus, the lever portion 176b and the engaging portion 169b are engaged. Here, the bracket member 167a moves in the axial direction by following the axial movement of the lever portion 176a of the operation lever 176 by the spring force of the spring 186a, and the axial end surface 1268a is in contact with the snap ring a. It has become. That is, the bracket member 167a is returned to the initial position by the function of the spring 186a as a select return spring. On the other hand, as shown in FIG. 18, the lever member 164a is in a state where the lever portion 166a is shifted to the third speed stage, and the lever portion 166a abuts against the wall portion fs1 ′ of the shift bracket fs1 in the axial direction. It is in a state where it cannot move, and is in a select waiting state in which a force for movement in the axial direction is stored by the function of the spring 182a as a select return spring.

  In this state, when a pre-shift request to the first gear is requested, the actuator 172 is driven in the select direction and the operation lever 176 is moved in the axial direction via the operation rod 174 (right direction in FIG. 17). The engagement between 176b and the engaging portion 169b is released, and the lever member 176a and the engaging portion 169a are engaged. At this time, since the bracket member 167a is returned to the initial position where the axial end surface 1268a contacts the snap ring a, the operation lever 176 is moved to the position before the shift bracket 167a is returned to the initial position by the spring force of the spring 186a. There is no need to move. As a result, the shift time can be shortened.

  When the operating lever 176 moves in the axial direction until the lever member 176a and the engaging portion 169a are engaged in this manner, the actuator 172 is then driven in the shift direction and the lever portion 176a of the operating lever 176 is operated via the operating rod 174. Rotate. When the lever portion 176a is rotated, the bracket member 167a is rotated via the engaging portion 169a, and the lever member 164a is rotated via the notch portion 168a 'while maintaining the selection waiting state. As the lever member 164a rotates, the shift bracket fs2 is moved by the lever portion 166a (downward in FIG. 18), and the lever portion 166a can move to the shift bracket fs1 side, that is, the engagement recess of the shift bracket fs2. When the shift bracket fs2 is moved to a state where the fsc2 and the engagement recess fsc1 of the shift bracket fs1 are matched, there is no obstacle to the axial movement of the lever member 164a, the spring 182a is released, and the lever member 164a The lever 166a is connected to the shift bracket fs1 by being instantaneously moved in the axial direction by the spring force of the spring 182a (leftward in FIG. 18). Then, the lever member 166a moves the shift fork f1 in the axial direction via the shift bracket fs1, thereby moving the coupling sleeve cs1 in the axial direction (right direction in FIG. 11), and the first speed driven gear G1. 'Is fixed to the output shaft 126, and the preshift operation to the first gear is completed.

  It should be noted that a pre-shift operation to another gear stage, for example, a pre-shift operation to the fourth gear stage when the power transmission state by the second gear stage is switched to the power transmission state by the third gear stage, or the power by the third gear stage. Pre-shift operation to the fifth speed stage when switching from the transmission state to the power transmission state by the fourth speed stage 6 at the time of switching from the power transmission state by the fourth speed stage to the power transmission state by the fifth speed stage Pre-shift operation to the speed stage, pre-shift operation to the fourth speed stage when the power transmission state by the sixth speed stage is switched from the power transmission state by the fifth speed stage to the fourth speed stage from the power transmission state by the fifth speed stage Pre-shift operation to the third gear when switching to the power transmission state Pre-shift operation to the second gear when switching from the power transmission state by the fourth gear to the power transmission state by the third gear Is basically a pre-shift operation to the second gear when the shifting operation to the first gear is completed, or switching from the power transmission state by the first gear to the power transmission state by the second gear. The operation is the same as the pre-shift operation to the first gear when the pre-shift operation to the third gear is switched from the power transmission state by the third gear to the power transmission state by the second gear. The description is omitted to avoid duplication.

According to the automatic shift transmission 100 of the second embodiment described above, the select operation by the actuator 172 is held in the select wait state by the odd speed waiting mechanism 160a and the even speed waiting mechanism 160b. It is possible to switch the shift speed between the odd speed and the even speed with only one operation each of the shift operation and the selection operation. As a result, the shift time can be shortened.
In addition, since it is not necessary to perform the shift operation of the actuator 172 intermittently, the control at the time of shifting can be simplified. Further, the lever members 164a and 164b are placed in the selection waiting state in the state where the force for movement in the axial direction is stored by the spring force of the springs 182a and 182b, the springs 184a and 184b, and the springs 186a and 186b. When the lever members 164a and 164b move in the select direction without any obstruction to the lever members 164a and 164b moving in the select direction, the spring force of the springs 182a and 182b, springs 184a and 184b, and springs 186a and 186b is instantaneous. A select operation is performed. As a result, the shift time can be further shortened.

  Further, according to the automatic shift transmission 100 of the second embodiment, the engagement width that is engaged when the lever portions 176a and 176b of the engagement portions 169a and 169b rotate is set to the bracket members 167a and 167b, that is, the lever. Since the width is set to such an extent that only the lever portions 176a and 176b can be returned to the initial positions while the members 164a and 164b are rotated, the lever portions 176a and 176b and the engaging portions 169a and It is not necessary to return the lever portions 176a and 176b to the initial position after once disengaging from the 169b. As a result, an axial space for returning the lever portions 176a and 176b to the initial position is not required, and the transmission itself can be made compact. In addition, since the operation of once releasing the engagement between the lever portions 176a and 176b and the engaging portions 169a and 169b is not required, the shift time can be shortened and the control during the shift can be simplified. Can do.

  Further, according to the automatic shift transmission 100 of the second embodiment, the lever portions 176a and 176b are integrally formed by extending in opposite directions on both axial end surfaces of the cylindrical boss portion 177 fixed to the operation rod 174. Therefore, an increase in the number of parts can be prevented as compared with the lever portions 176a and 176b provided separately.

  In the automatic shift transmission 100 of the second embodiment, the first input shaft 124 is provided with a drive gear G that constitutes an odd-numbered shift stage, and the second input shaft 125 is provided with a drive gear G that constitutes an even-numbered shift stage. For example, the drive gear G constituting the low speed gear stage is arranged on the first input shaft 124, and the drive gear G constituting the high speed gear stage is arranged on the second input shaft 125. Any combination of the drive gears G arranged on the first input shaft 124 and the second input shaft 125 may be used.

  In the automatic shift transmission 100 of the second embodiment, the engagement widths that are engaged when the lever portions 176a and 176b of the engagement portions 169a and 169b rotate are the bracket members 167a and 167b, that is, the lever members 164a and 164a, The width is set so that only the lever portions 176a and 176b can be returned to the initial positions while the 164b is rotated, but the engaging width of the engaging portions 169a and 169b is that of the lever portions 176a and 176b. Even if it is almost the same width as the lever, it does not matter. In this case, in order to perform the pre-shift operation, the lever portions 176a and 176b and the engaging portions 169a and 169b are temporarily disengaged and the lever portions 176a and 176b are returned to the initial position state. .

  In the automatic shift transmission 100 according to the second embodiment, the lever portions 176a and 176b are opposite to each other on both axial end surfaces of the cylindrical boss portion 177 fixed to the operation rod 174 (positions that are 180 ° out of phase). The lever portions 176a, 176a, and so on are integrally formed. However, depending on the layout, the lever portions 176a, The angle 176b may be any angle.

  In the automatic shift transmission 100 of the second embodiment, the lever portions 176a and 176b are integrally formed on both end surfaces in the axial direction of the cylindrical boss portion 177 fixed to the operation rod 174. However, the lever portions 176a and 176b are formed integrally. May be at any position in the axial direction of the cylindrical boss portion 177, or may be provided separately from the cylindrical boss portion 177 and integrated by welding or the like.

  In the automatic shift transmission 100 according to the second embodiment, the operation lever 176 has been described as one component in which the lever portions 176a and 176b are integrally formed on one cylindrical boss portion 177 fixed to the operation rod 174. Even if it consists of two parts in which each lever part 176a, 176b was integrally formed in the cylindrical boss | hub part, it does not interfere.

  As mentioned above, although embodiment of this invention was described using the Example, this invention is not limited to such an Example, In the range which does not deviate from the summary of this invention, it can implement with a various form. Of course.

1 is a schematic configuration diagram showing an outline of a configuration of an automatic shift transmission 10 according to an embodiment of the present invention. 3 is a configuration diagram showing details of the configuration of a speed change operation mechanism 50. FIG. It is the arrow view which looked at FIG. 2 from the arrow V direction. 3 is a schematic diagram schematically showing a neutral state of a speed change operation mechanism 50. FIG. It is a mimetic diagram showing typically the state where lever part 66 was shifted to the 2nd gear stage. FIG. 6 is a state diagram showing a state of the speed change operation mechanism 50 when the lever member 64 is selectively driven to the shift bracket Fs2 side by the actuator 72 in a state where the lever member 64 is shifted to the second speed stage. FIG. 10 is a state diagram showing a state of the speed change operation mechanism 50 when the lever portion 66 is selected to the shift bracket Fs2 side. It is a mimetic diagram showing typically the state where lever part 66 was shifted to the 3rd speed stage. FIG. 6 is a state diagram showing a state of the speed change operation mechanism 50 when the lever member 64 is selectively driven to the shift bracket Fs1 side by the actuator 72 in a state where the lever member 64 is shifted to the third speed stage. FIG. 10 is a state diagram showing a state of the speed change operation mechanism 50 when the lever portion 66 is selected to the shift bracket Fs1 side. It is a schematic block diagram which shows the outline of a structure of the automatic shift type transmission 100 as 2nd Example of this invention. 4 is a detailed configuration diagram showing details of the configuration of a waiting mechanism 160. FIG. It is the arrow line view which looked at FIG. 12 from the arrow W direction. It is the schematic diagram which showed typically the connection relationship of shift bracket fs1, fs2, fs3, fs4 and lever part 166a, 166b at the time of a start request | requirement. It is a state diagram showing the state of the speed change operation mechanism 150 during the preshift operation to the third gear. FIG. 10 is a state diagram showing a state of the speed change operation mechanism 150 when the lever portion 166a is selected to the shift bracket fs2 side during the pre-shift operation to the third speed stage. It is a state diagram showing the state of the speed change operation mechanism 150 when the power transmission state by the third gear is switched to the power transmission state by the second gear. It is the schematic diagram which showed typically the connection relation of shift bracket fs1, fs2, fs3, fs4 and lever part 166a, 166b at the time of the pre-shift request | requirement to 1st gear stage.

1a, 1b, 100a, 100b Case 10, 100 Automatic shift transmission 22 Dry clutch 24 Input shaft
26, 126 Output shaft 28, 128 Reverse idler shaft 32 Differential gear 50, 150 Shifting operation mechanism 60, 160 Waiting mechanism 62, 162a, 162b Rod 64, 164a, 164b Lever member 65, 165a, 165b Cylindrical portion 65a, 165a ′, 165b ′ Large diameter portion 65b, 165a ″, 165b ″ Small diameter portion 65a ′, 65b ′, 1165a ′, 1165b ′, 1165a ″, 1165b ″ End surface 65a ″, 1265a, 1265b Stepped portion 66, 166a, 166b Lever part 67, 167a, 167b Bracket member 68, 168a, 168b Boss part 68 ', 68'', 1168a, 1168b, 1268a, 1268b Axial end face 68a, 168a', 168b 'Notch part 68b, 168a'',168b''Buttocks 69, 169a, 1 69b engaging portion 69 ', 169a', 169b 'end surface 69a, 1169a, 1169b bottom surface 69b opening recess 169a'',169b''bottomed opening recess 72, 172 actuator 74, 174 operating rod 76, 176 operating lever 82, 84 , 86, 182a, 182b, 184a, 184b, 186a, 186b Spring TM transmission mechanism G drive gear G1 1st speed drive gear G2 2nd speed drive gear G3 3rd speed drive gear G4 4th speed drive gear G5 5th speed drive gear G6 6th speed drive Gear GR Reverse drive gear G 'Driven gear G1' 1st speed driven gear G2 '2nd speed driven gear G3' 3rd speed driven gear G4 '4th speed driven gear G5' 5th speed driven gear G6 '6th speed driven gear Drive gear GR 'Reverse driven gear GO Output gear GRI Reverse idler gear S Synchronizer S1 For 1 and 2 speed S2 3 / reverse speed synchronizer s1 1 / reverse speed synchronizer s2 3/5 speed synchronizer s3 6 speed synchronizer s4 2/4 speed synchronizer CS1, CS2, cs1, cs2, cs3 cs4 Coupling sleeve F1, F2, f1, f2, f3, f4 Shift fork Fb1, Fb2, fb1, fb2, fb3 Boss part Fs1, Fs2, fs1, fs2, fs3, fs4 Shift bracket Fs1 ', Fs2' Wall part Fsc1, Fsc2, fsc1, fsc2 engaging recess Fs1 ′, Fs2 ′, fs1 ′, fs2 ′, fs3 ′, fs4 ′ Wall R, Ra, Rb Ring member SR, SRa, SRb, a, b Snap ring CL1 First clutch CL2 Second clutch 124 First input shaft 125 Second input shaft 160a Odd gear stage waiting mechanism 160b Even number change Quick waiting mechanism 177 Cylindrical boss

Claims (15)

In an automatic shift transmission that shifts power from the engine and transmits it to the drive shaft,
A plurality of shift stages capable of transmitting the power to the drive shaft with different speed ratios;
A plurality of switching means capable of switching at least one of the plurality of shift speeds between a shift state and a neutral state;
A lever member selectively engageable with any one of the plurality of switching means;
A shift shaft carrying the lever member;
In the selecting direction for selecting one of said plurality of switching means, and select actuator capable of driving said lever member,
A shift actuator capable of driving the lever member in a shift direction so that the selected switching means is switched;
When the lever member cannot be driven in the select direction, and when the lever member is driven in the select direction by the select actuator, the lever member waits in a state waiting for driving in the select direction and the select member Standby drive means for driving the lever member in the select direction when driving in the direction becomes possible;
Equipped with a,
The standby driving means has a second lever member connected to the lever member via an elastic means, and the elastic means is driven when the select actuator is driven when the lever member cannot be driven in the select direction. The lever member is placed in the drive waiting state by driving only the second lever member in the select direction against the elastic force of
The elastic means has an engaging portion that engages with the second lever member and is provided so as to be relatively movable with respect to the lever member; and a spring means that applies an elastic force to the engaging member. And means having
The automatic shift transmission , wherein the spring means is means for urging the engaging member with respect to the lever member in the axial direction of the shift shaft . The spring means is means capable of returning the engagement member to an initial position before the driving force in the select direction is applied when the driving force in the select direction by the select actuator is released. Item 2. The automatic shift transmission according to Item 1 . 3. The automatic waiting device according to claim 2, wherein the standby driving unit includes a second spring unit capable of returning the lever member to the initial position when the driving force in the select direction by the select actuator is released. Shift transmission. The automatic shift transmission according to any one of claims 1 to 3 , wherein the lever member is slidably supported in the axial direction with respect to the shift shaft. The automatic shift transmission according to claim 3 or 4, wherein the second spring means is means for urging the lever member in the axial direction with respect to the shift shaft. A first power transmission path for shifting the power from the engine to the first shift stage via the first clutch and transmitting it to the drive shaft, and the power from the engine to the second shift stage via the second clutch. And a second power transmission path for transmitting to the drive shaft,
A first switching means capable of switching the first power transmission path between a power transmission enabled state and a power transmission disabled state by switching the first shift speed between a shift state and a neutral state;
Second switching means capable of switching the second power transmission path between a power transmission enabled state and a power transmission disabled state by switching the second shift speed between a gear shift state and a neutral state;
A first shift lever member selectively engaged with the first switching means;
A second shift lever member that selectively engages with the second switching means;
A select actuator capable of driving the first shift lever member or the second shift lever member in a select direction for selecting the first switching means or the second switching means;
A shift actuator capable of driving the selected first shift lever member or the selected second shift lever member in a shift direction;
When the first gear lever is driven in the select direction by the select actuator when the first gear lever member cannot be driven in the select direction, the first gear lever member is A first standby driving means for waiting in the state of waiting for driving in the select direction and driving the first gear lever member in the select direction when driving in the select direction becomes possible;
When the second gear lever member is driven in the select direction by the select actuator when the second gear lever member cannot be driven in the select direction, the second gear lever member is Second standby drive means for waiting in the select direction drive waiting state and driving the second shift lever member in the select direction when driving in the select direction becomes possible;
Equipped with a,
The first standby drive means has a first gear stage second lever member connected to the first gear stage lever member via first elastic means, and the first gear stage lever member is the select gear member. When the select actuator is driven when it cannot be driven in the direction, only the first gear shift second lever member is driven in the select direction against the elastic force of the first elastic means. Means for placing the first shift lever member in the drive waiting state;
The second standby drive means has a second gear stage second lever member connected to the second gear stage lever member via a second elastic means, and the second gear stage lever member is the select gear. When the select actuator is driven when it cannot be driven in the direction, the second lever member for the second gear stage is driven only in the select direction against the elastic force of the second elastic means. An automatic shift transmission which is means for bringing the two-speed-stage lever member into the drive waiting state . The first elastic means has a first engagement portion that engages with the first gear stage second lever member and is provided with a first engagement that is relatively movable with respect to the first gear stage lever member. A means having a combination member and a third spring means for applying an elastic force to the first engagement member;
The second elastic means has a second engaging portion that engages with the second gear step second lever member, and is provided in a second relationship that is movable relative to the second gear step lever member. The automatic shift transmission according to claim 6 , wherein the automatic shift transmission includes a combination member and a fourth spring unit that applies an elastic force to the second engagement member. The third spring means can return the first engagement member to the initial position before the driving force in the selection direction is applied when the driving force in the selection direction by the selection actuator is released. Means,
The fourth spring means can return the second engagement member to the initial position before the driving force in the selection direction is applied when the driving force in the selection direction by the selection actuator is released. The automatic shift transmission according to claim 7, which is means. The first standby drive means has fifth spring means capable of returning the first shift lever member to the initial position when the drive force in the select direction by the select actuator is released.
The second standby drive means is means having a sixth spring means capable of returning the second shift lever member to the initial position when the drive force in the select direction by the select actuator is released. The automatic shift transmission according to claim 8 . A first shift shaft carrying the first gear lever member and a second shift shaft carrying the second gear lever member;
The select direction is an axial direction of the first shift axis and the second shift axis,
The third spring means is a means for urging the first engagement member in the axial direction with respect to the first shift lever member.
The automatic shift transmission according to any one of claims 7 to 9, wherein the fourth spring means is means for urging the second engagement member in the axial direction with respect to the second shift lever member. The first-gear-lever member and the second-gear-lever member is formed by slidably supported in the axial direction with respect to each of the first shift axis and the second shift axis claim 10, wherein Automatic shift transmission. The fifth spring means is means for biasing the first shift lever member in the axial direction with respect to the first shift shaft,
The sixth spring means, claim 10 or claim 11 automatic shifting according according to claim 9, which is a means for biasing in the axial direction of the second gear change lever member relative to the second shift axis Type transmission. The first engaging portion can return the first gear second lever member to the neutral state in the shift direction while the first switching means is shifted to the selected first gear. Formed as
The second engagement portion can return the second gear second lever member to the neutral state in the shift direction while the second switching means is shifted to the selected second gear. The automatic shift transmission according to any one of claims 7 to 12 , wherein the automatic shift transmission is formed as described above. The automatic shift transmission according to any one of claims 6 to 13, wherein the first gear second lever member and the second gear second lever member are integrally formed. The first gear is an even gear.
The automatic shift transmission according to any one of claims 6 to 14 , wherein the second shift speed is an odd speed.

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