JP2539524B2 - Transmission parking mechanism - Google Patents

Description

The present invention relates to a parking mechanism of a transmission.

(B) Conventional technology As a conventional parking mechanism for a transmission, for example,
There is one such as that shown in JP-A-60-65162. The parking mechanism of this transmission includes a parking gear, a parking pole which can be engaged with the parking gear, a parking actuator for operating the parking pole, an actuator support member for guiding the parking actuator and supporting a reaction force acting on the parking actuator. And have. When the select lever is moved to the P range, the parking actuator moves forward to enter between the actuator support member and the parking pole, and the cam action generated thereby rotates the parking pole to the parking gear side. As a result, the parking pole engages with the parking gear, and the parking mechanism is activated.

(C) Problem to be Solved by the Invention In the case of the conventional parking mechanism of the transmission as described above, if all members configuring the parking mechanism are provided on the same casing member side, these members are provided. Can be sequentially assembled from the opening side of the casing member. However, the parking pole is arranged on one casing member side, the actuator support member and the parking actuator are arranged on the other casing member side,
By previously assembling these members to each casing member and assembling both casing members,
When assembling the parking mechanism, the parking pole interferes with the actuator support member,
There is a problem that the assembly work is difficult. That is, the parking pole is in a state of being pressed against the actuator support member and the parking actuator side by the return spring, and in this state, the parking pole and the actuator support member occupy the overlapping position, and the two casing members are in close contact with each other. I can't let you do it. If it is possible to put a hand in the casing at the time of assembling, it is possible to assemble, but it is practically impossible to put a hand in the casing.
The present invention aims to solve such problems.

(D) Means for Solving the Problems The present invention solves the above problems by providing the actuator support member with a guide surface for guiding the parking pole during assembly. That is, according to the present invention, the one casing member (10) has the pin (12) fixed thereto.
And a perquig pole that can be rotated around a pin (14)
And a return spring (20) that constantly pushes the parking pole toward the side not engaged with the parking gear.
And the other casing member (18) connected to one casing member in close contact with each other, the actuator support member (24) is fixed and the parking actuator (26) is provided. , The parking actuator does not exert a force on the parking pole when the select lever is in a range other than the P range, while in the P range, the parking actuator enters between the actuator support member and the parkig pole and the cam action of the parking actuator causes the parking pole to move. Configured to rotate to the engaging position side, one casing member having a pin, a parking pole and a return spring assembled, and the other casing member provided with an actuator support member and a parking actuator. Toga pair Parking pawl when temple,
This is intended for a parking mechanism of a transmission in which an actuator support member and a parking actuator are set in a predetermined positional relationship. A guide surface (50) for assembly is provided on the actuator support member. Can contact the corresponding guided portion (14b) of the parking pole when assembling one casing member and the other casing member, and the inclination of the guide surface as one casing member and the other casing member approach each other. Accordingly, the parking pole is configured to rotate in a direction against the force of the return spring. The reference numerals in parentheses indicate the corresponding members in the embodiments described later.

(E) Action A pin, a parking pole, and a return spring are roughly assembled on one casing member. Further, an actuator support member, a parking actuator, etc. are assembled in advance to the other casing member. When the two casing members are assembled to each other in this state, the guided portion of the parking pole comes into contact with the guide surface of the actuator support member, and the parking pole displaces the return spring and rotates to the predetermined assembly position. Therefore, both casing members can be brought into close contact with each other, and when the both casing members are in close contact with each other, the parking pole is set at a predetermined position with respect to the actuator support member. Therefore, the parking mechanism can be assembled at the same time only by assembling both casing members.

(F) Example An example of the present invention is shown in FIGS. A parking pole 14 is provided so as to be swingable around a pin 12 press-fitted in the first casing member 10 as a fulcrum. Parking pole 14
The pin 12 is positioned between the spacer 16 and the second casing member 18 in the axial direction of the pin 12 by being sandwiched between the spacer 16 and the second casing member 18. A return spring 20 is provided on the outer periphery of the spacer 16, and the return spring 20 acts on the parking pole 14 in the counterclockwise direction in FIG. Second
An actuator support member 24 is attached to the casing member 18 with a bolt 22. A parking actuator is provided in the through hole 25 of the actuator support member 24.
26 are provided. The parking actuator 26 has a small diameter portion 26a, a taper portion 26b and a large diameter portion 26c. The parking actuator 26 is supported by a shaft 28 so as to be movable in the axial direction, receives a force in the left direction in FIG. 1 by a spring 30, and is pressed against a stopper 30 provided at the tip of the shaft 28. . The shaft 28 is connected to one end of a bell crank 34 that swings around a pin 32 as a fulcrum. One end of a connecting rod 36 is connected to the other end of the bell crank 34, and the other end of the connecting rod 36 is connected to a manual plate 38. The manual plate 38 is rotatable around a manual shaft 40 as a unit therewith. The manual shaft 40 is connected to a driver's seat select lever via a link mechanism (not shown). P on the manual plate 38,
The corrugated end face 42 corresponding to the R, N, D, 2 and 1 ranges is provided, and the roller 46 supported by the leaf spring 44 is pressed against the corrugated end face 42, whereby the manual plate 38 of the manual plate 38 is pressed. Positioning is being done.

The actuator support member 24 has the shape shown in FIGS. That is, it has a tubular portion having a hole 25, a mounting portion having a hole 48 for mounting with the bolt 22, and a guide surface 50 described later. Hole 25
The parking actuator 26 has a reaction force supporting portion 25a for penetrating the parking actuator 26, and a tapered portion 26b and a large diameter portion 26c of the parking actuator 26 which are pressed when the parking actuator 26 moves forward. The guide surface 50 is inclined as shown in FIG. 4, and the guided portion 14c of the parking pole 14 comes into contact with this when it is assembled.

Next, the assembly work of the parking mechanism of this transmission will be described. The pin 12, the return spring 20, the spacer 16 and the parking pole 14 are assembled in advance on the first casing member 10 side. On the other hand, the second casing member
An actuator support member 24, a parking actuator 26, a bell link 34, a manual plate 38, and the like are attached to the 18. Although the predetermined parts are assembled in advance in this way, the first casing member 10 is assembled to the second casing member 18. That is, the first casing member 10
The second casing member by fitting the pin 12 fixed to the side to the hole on the side of the first casing member 18 and by fitting a pin and a hole (not shown) for alignment.
The first casing member 10 is positioned at 18, and the first casing member 10 is moved closer to the second casing member 18 side. At this point in time, the parking pole 14 is pressed counterclockwise in FIG. 2 by the return spring 20, but the parking pole 14 does not move the guided portion 14b as shown by the phantom line in FIG. The first casing member is brought into contact with the guide surface 50 of 24.
As 10 is pushed to the side of the second casing member 18, it is guided by the guide surface 50 and rotates clockwise around the pin 12 as a fulcrum, and finally rides on the upper end surface side of the actuator support member 24 in FIG. Therefore, the assembling can be carried out without requiring the operation of holding the parking pole 14 in the predetermined assembling position at the time of assembling (this operation is practically impossible because the hand does not enter the casing). You can

The parking mechanism of this transmission performs the parking operation as follows. That is, the manual shaft
When 40 is rotated to select the P range position, the parking actuator 26 advances leftward in FIG. 1 via the rod 36, the bell crank 34 and the shaft 28. The parking actuator 26 rides on the reaction force support portion 25a of the actuator support member 24, and rotates the parking pole 14 clockwise with the pin 12 as a fulcrum in FIG. As a result, the toothed portion 14a at the tip of the parking pole 14 is moved to the parking gear 5
Engage with 2 and fix it. When releasing the parking mechanism, if the manual plate 38 is set to a range other than the P range, the parking actuator 26 retracts, and accordingly the parking pole 14 causes the return spring 20 to move.
Is returned to the stop position (the position in contact with the upper end surface of the actuator support member 24, as shown in FIG. 4).

(G) Effect of the Invention As described above, according to the present invention, the actuator support member is provided with the guide surface to guide the parking pole at the time of assembly. It is possible to easily carry out the assembling work even when the casings are previously assembled in different casing members.

[Brief description of drawings]

FIG. 1 is a front sectional view of an embodiment of the present invention, FIG. 2 is a side sectional view of the embodiment shown in FIG. 1, FIG. 3 is a plan view of an actuator support member, and FIG. 4 is IV of FIG. FIG. 4 is a cross-sectional view taken along the line IV. 10 …… First casing member, 12 …… Pin, 14 …… Parking pole, 18 …… Second casing member, 24 …… Actuator support member, 26 …… Parking actuator, 50 …… Guide surface.

Claims (1)

(57) [Claims] 1. A casing member having a pin fixed to the casing member, a parking pole rotatable about the pin, and a return spring for constantly pressing the parking pole toward a position not engaged with the parking gear. Is provided, and the other casing member, which is connected to one casing member in close contact with the other casing member, is provided with a parking actuator and an actuator support member fixed thereto. In other cases, no force is applied to the parking pole, while in the P range, the parking actuator enters between the actuator support member and the parkig pole, and the cam action of the parking actuator rotates the parking pole toward the meshing position side. Is configured, When one casing member is assembled with a pin, a parking pole, and a return spring, and the other casing member is provided with an actuator support member and a parking actuator, the parking pole, the actuator support member, and the parking actuator are assembled. In the parking mechanism of the transmission in which is set to a predetermined positional relationship, the actuator support member is provided with a guide surface for assembling, and this guide surface is used when assembling one casing member and the other casing member. The pawl is capable of contacting the corresponding guide portion of the pawl, and as one casing member and the other casing member approach each other, the parking pawl rotates in a direction against the force of the return spring according to the inclination of the guide surface. Parking mechanism, characterized by being configured to.