JP3718545B2 - Control gear reverse shift control device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a configuration that enables a check device to be operated or released in conjunction with the reverse rotation of a handle in a management machine that can check a reverse shift or a PTO shift during forward work. .
[0002]
[Prior art]
Conventionally, when a rotary cultivator is attached to a management machine and a tilling operation is performed, the main shift lever is operated to switch to high speed forward, low speed forward or reverse travel.
In addition, the rotational speed of the rotary tiller is switched using a PTO shift lever.
When a cult work or the like is performed while the vehicle is moving backward, the handle is rotated forward, the gear is shifted to a reverse gear, and the rotary tiller is driven to perform the operation.
[0003]
[Problems to be solved by the invention]
In such a conventional management machine, when plowing work is performed while moving forward, when turning to the field end, if the field end is narrow, it turns backward, but at this time the PTO speed change lever shifts. If it is in the position, the rotary will rotate even when turning backward, and the operator may hit if it is not separated from the rotary, and if the handle is lifted and the rotary is not raised from the ground, the soil will scatter. Not only did it work for the operator, but the field was also ruined and the driving force was wasted.
Therefore, when the work speed change lever is in the “ON” position during forward work, the main speed change lever has been restrained so that it cannot be changed to the reverse speed.
[0004]
However, since this check mechanism was manually operated to “turn on” and “turn off”, when working while moving backward, the check was operated to “off”, and when working while moving forward, the check was turned “on”. Therefore, after switching between forward work and reverse work, if you forget to change the “on” or “off” operation of the check mechanism, the rotary may turn when the reverse gear shifts during forward work. is there.
[0005]
[Means for Solving the Problems]
The present invention uses the following means in order to solve the above problems.
In the left and right direction of the mission case 23 of the management machine A, a traveling fork shaft 35 that performs a traveling shift and a tilling fork shaft 36 that performs a PTO shifting project in parallel so as to be slidable. A stopper pin 5 is disposed between the mating groove 35a and the fitting groove 36a formed on the tillage hawk shaft 36 , and the stopper pin 5 can be slid into and removed from the collar 4 fixed to the pivot shaft 2. In addition, the stopper pin 5 is fitted to the tillage hawk shaft 36 when the vehicle is moved backward while the handle 32 is disposed on the rotary tiller B with the pivot shaft 2 being pivotable up and down. In the configuration in which the reverse shift check device 1 is inserted so as not to be able to slide the tilling shaft 36 and to make the tilling work impossible, the handle 32 of the management machine A is opposite to the rotary tilling device B. After the reverse A structure for releasing the shift check device 1 is provided, and the release mechanism locks one end of the rotation link 19 to one end of the stopper pin 5, and the middle part of the rotation link 19 is pivotally supported by the pivot shaft 13. The other end of the rotation link 19 is pivotally connected to one end of the connection link 6, the connection link 6 is arranged up and down, and the upper portion can be pressed by the rotation guide plate 11 protruding from the side portion of the handle 32 base. By rotating the handle 32 to the opposite side of the rotary tiller B, the connecting link 6 is pushed, and the stopper pin 5 is pulled out from between the traveling fork shaft 35 and the tiller fork shaft 36, so that the reverse shift control device 1 is It is a thing to cancel.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
The problems and means to be solved by the present invention are as described above. Next, an embodiment of the present invention shown in the accompanying drawings will be described.
FIG. 1 is a side view of a management machine adopting the present invention, FIG. 2 is a plan view of a handle base, FIG. 3 is a side view of a reverse shift control device “ON” of the present invention, and FIG. FIG. 5 is a partial front sectional view showing a state in which the stopper pin of the reverse shift control device of the present invention is positioned in the fitting groove of the tillage shaft, and FIG. 6 is also a reverse shift check device. FIG. 7 is a partial front cross-sectional view of a state in which the stopper pin of the reverse shift control device is located at a high speed position of the tilling hawk shaft.
[0007]
The overall configuration of the management machine A provided with the rotary tiller B will be described with reference to FIG.
An engine E is mounted on the engine stand 20, and a fuel tank 21 is mounted on the top of the engine E. Power is transmitted to the transmission case 23 via the transmission case 22 on the side of the engine E, and the power changed by the transmission case 23 is transmitted from the transmission case 23 to the chain case 23b that protrudes forward and downward. The wheel 24 is driven to travel by driving the axle 24 arranged at the lower end.
Further, a tilling claw shaft 26 is horizontally mounted on the lower end of the chain case 23c projecting rearward and downward from the transmission case 23, and a plurality of tilling claws 30 and 30 are arranged on the axis of the tilling claw shaft 26. ... are planted.
[0008]
In the present embodiment, the chain case 23b and the chain case 23c are integrally formed by bending in a substantially inverted “V” shape when viewed from the side, and are bent in a generally inverted “V” shape when viewed from the side. The upper part of the bent portion is a mission case 23.
The tilling claw shaft 26 and the tilling claws 30... Are covered with a tilling cover 38 to constitute a rotary tilling device B.
Further, a rotary frame 27 protrudes rearward from the rear part of the chain case 23c, and an attachment fixing boss 29 is fixed to the rear end part of the rotary frame 27 to attach the gauge wheel 28 and various towing machines. It is configured to be able to.
[0009]
A handle base 31 is provided at the upper part of the transmission case 23. A handle 32 is mounted on the handle base 31 so as to be able to rotate 360 °. In a normal state, the handle 32 protrudes rearward. Yes.
In the vicinity of the handle base 31, a main transmission lever 33, a rotation fixing lever 34, and a PTO transmission lever 12 to be described later protrude. The handle 32 can be rotated by operating the rotation fixing lever 34.
[0010]
In the transmission case 23, a traveling fork shaft 35 and a tilling fork shaft 36 are arranged in parallel in the left-right direction. The left end portion of the traveling fork shaft 35 is connected to the base portion of the main transmission lever 33, and by switching the main transmission lever 33, the traveling fork shaft 35 is slid left and right to move the traveling wheel. The running speed of 24 is changed. The traveling fork shaft 35 protrudes from a fork (not shown) inside the mission case 23, the fork is fitted to the transmission gear, and the transmission gear slides in conjunction with the sliding of the traveling fork shaft 35. Thus, the gear can be shifted by meshing with the transmission gear.
[0011]
As shown in FIGS. 3 to 7, the reverse shift control device 1 of the present invention is disposed on the right side surface of the mission case 23. On the right side surface of the transmission case 23, a side view oval guide portion 10 is provided, and the right end portions of the traveling fork shaft 35 and the tillage fork shaft 36 protrude from the portion. A fitting groove 35a having a wide lateral width is formed on the outer peripheral surface of the right end portion of the traveling hawk shaft 35, and a narrow fitting groove 36a is formed on the outer peripheral surface of the right end portion of the tilling hawk shaft 36. At the right end of the tilling fork shaft 36, a pivotal support portion 12 a configured in a U-shape is fitted to the tip of the PTO transmission lever 12 and pivotally supported by the pivotal support pin 14.
[0012]
A pivot support 15 protrudes from the side of the mission case 23 at a rear position of the guide portion 10, and a pivot support portion 12 a of the PTO transmission lever 12 is pivoted by a pivot pin 9 at an end of the pivot support 15. The PTO speed change lever 12 can be turned left and right around the pivot pin 9.
By rotating the PTO speed change lever 12 to the left and right, the tilling shaft 36 can be slid left and right, and the tilling shaft 36 slides in the mission case 23 through a fork (not shown) in the same manner as described above. The transmission gear is slid on the rotary gear so that the rotational speed of the rotary can be changed.
[0013]
A pivot shaft 2 is projected from the side surface of the transmission case 23 at a position in front of the projecting portion of the tillage shaft 36, and a boss 3 is pivotally supported on the pivot shaft 2. A cylindrical collar 4 is fixed orthogonally to the upper part of the middle part of the cylinder. The collar 4 has an axial core disposed in the front-rear direction, and a stopper pin 5 is fitted therein so as to be slidable in the front-rear direction.
[0014]
A cylindrical stopper contact portion 5a is formed at the rear end of the stopper pin 5, and a compression spring 8 is externally fitted on the stopper pin 5 between the front surface of the stopper contact portion 5a and the rear surface of the collar 4. ing. The compression spring 8 biases the stopper contact portion 5a backward, and the stopper contact portion 5a is biased so as to be inserted between the traveling fork shaft 35 and the tilling fork shaft 36. Yes.
[0015]
One end of a rotation link 19 is locked to the front end portion of the stopper pin 5, and a midway portion of the rotation link 19 is pivotally supported by a pivot shaft 13 protruding from the side surface of the transmission case 23. The other end of the link 19 is connected to one end of the connecting link 6. The connecting link 6 is arranged in the vertical direction, the lower end is pivotally supported by the rotating link 19, and the upper part projects to the side of the handle base 31. The upper part of the connecting link 6 is fitted into a guide boss 7 fixed to the side surface of the handle base 31 and protrudes upward from the guide boss 7. A locking ring 16 is fixed to the upper part of the connecting link 6. A compression spring 17 is externally fitted on the connecting link 6 between the locking ring 16 and the upper surface of the guide boss 7 to urge the connecting link 6 so as to protrude upward.
[0016]
Further, as shown in FIGS. 2 and 4, the rotation guide plate 11 protrudes in the horizontal direction on the right side of the lower end of the handle 32. The rotation guide plate 11 is arranged in accordance with the width at which the upper end of the connecting link 6 is located. Both front and rear ends are bent upward so that the upper end of the connecting link 6 can be pushed in smoothly. The length is such that the connecting link 6 can be pushed down even if the lever 32 is slightly rotated left and right.
In this embodiment, it is pushed down even at a position rotated by 35 ° to the left and right so that the user can work by grasping the handle 32 while walking along the side of the bag.
[0017]
Next, the positional relationship among the stopper pin 5, the connecting rod 6, the rotation guide plate 11, the traveling fork shaft 35, and the tilling fork shaft 36 will be described for the reverse shift control device 1 configured as described above.
First, the travel fork shaft 35 and the tillage fork shaft 36 are horizontally mounted on the transmission case 23, the distance between the axes is constant, and the diameter of the stopper contact portion 5a that can be positioned between them is also constant. The stopper abutting portion 5a can be fitted between the traveling fork shaft 35 and the tilling fork shaft 36 only when the fitting groove of either one of the shaft 35 and the tilling fork shaft 36 is located on the extension of the stopper pin 5.
When the stopper contact portion 5a is fitted between the traveling fork shaft 35 and the tillage fork shaft 36, the stopper contact portion 5a is fitted in the insertion groove of one shaft, and the other shaft slides. In order to be able to move, the drive of the rotary at the time of reverse drive is regulated.
[0018]
Specifically, when plowing while moving forward, the handle 32 protrudes rearward, and the rotation guide plate 11 is positioned above the connecting link 6 as shown in FIGS. However, the connecting link 6 is lifted upward by the biasing force of the spring 17, the rotating link 19 is rotated, and the stopper pin 5 is pressed forward by the biasing force of the spring 8. ~ The reverse shift check state shown in Fig. 7 is established.
[0019]
In the state shown in FIG. 5, when the PTO speed change lever 12 is operated to the neutral position (N), the stopper abutting portion 5a is fitted in the fitting groove 36a formed in the tillage fork shaft 36, and the main speed change is performed. The speed change operation of the lever 33 can be freely operated from the forward speed (F) to the reverse speed (R).
Conversely, in the state where the main transmission lever 33 is shifted to the reverse speed (R), the distance between the traveling fork shaft 35 and the tillage fork shaft 36 is constant even if the PTO transmission lever 12 is rotated to change the speed. Therefore, the stopper abutting portion 5a cannot come out of the fitting groove 36a, the tilling shaft 36 is fixed at the neutral position (N), and the tilling claw 30 cannot be driven during reverse travel.
[0020]
Next, the state shown in FIG. 6 is a state in which the main transmission lever 33 is positioned at the neutral position (N) and the PTO transmission lever 12 is rotated to the low speed (L), and the stopper contact portion 5a is the traveling hawk shaft. 35, the tilling shaft 36 can be slid at high speed (H), neutral (N), and low speed (L), and the working speed of the rotary can be changed.
On the other hand, in a state where the PTO speed change lever 12 is rotated to a low speed (L), the main speed change lever 33 can shift to a forward speed (F) and a neutral position (N) in the fitting groove 35a.
Similarly, FIG. 7 shows the position where the main speed change lever 33 is changed to the forward speed (F) and the PTO speed change lever 12 is changed to the high speed (H), and the stopper contact portion 5a is located in the fitting groove 35a. The tilling shaft 36 can be freely slid at high speed (H), neutral (N), and low speed (L), and can be cultivated while moving forward.
On the contrary, in a state where the PTO speed change lever 12 is changed to a high speed (H), the main speed change lever 33 can be changed to the forward speed (F) and the neutral position (N) in the fitting groove 35a.
The stopper pin 5 pivots up and down in FIGS. 5 and 6, and the pivot center is the pivot shaft 2.
[0021]
Thus, when the PTO speed change lever 12 is in the high speed (H) or low speed (L) position, the main speed change lever 33 can shift only to the forward speed (F) and the neutral position (N), and to the reverse speed (R). The speed cannot be changed, and the vehicle does not move backward while the rotary is rotating. On the other hand, when the main transmission lever 33 is shifted to the reverse speed (R), the PTO transmission lever 12 cannot be rotated to any position other than the neutral position (N), and the rotary is not rotated during the reverse movement. “On”.
[0022]
In the case where the handle 32 is rotated forward and moved backward, such as in a cultivator or a multi-laying operation, when the handle 32 is rotated forward as shown in FIG. The rotating guide plate 11 provided on the upper end of the connecting link 6 abuts on the upper end of the connecting link 6, pushes down the connecting link 6, and the rotating link 19 locked to the lower end of the connecting link 6 is rotated to rotate the stopper pin 5. Pulling forward, the stopper abutment portion 5a is removed from between the traveling fork shaft 35 and the tilling fork shaft 36, and the reverse shift check is released ("off").
That is, since the stopper contact portion 5a is not located between the traveling fork shaft 35 and the tilling fork shaft 36, the main speed change lever 33 and the PTO speed change lever 12 are rotatable, and the tillage claw 30 is moved while the management machine A is moved backward. It is possible to work by driving.
[0023]
【The invention's effect】
Since the present invention is configured as described above, the following effects can be obtained.
In other words, by simply rotating the handle 32 to the opposite side of the rotary tiller B, the link is moved and the stopper pin of the reverse shift check device can be removed to release the reverse shift check. , It is not necessary to operate the release lever, which makes operation easier.
Further, when the normal handle 32 is disposed on the rotary tiller B side and the work is performed while moving forward, the rotation guide plate 11 provided on the handle 32 pushes the connecting link 6 to stop the reverse shift control device. When the pin is pushed, it automatically enters the check state, and there is no need to provide a separate release lever to operate this release lever to the check position, preventing forgetting of the check operation and ensuring reverse shift check. The rotary does not rotate even if it is done, and the field is not destroyed and the soil is not scattered.
[Brief description of the drawings]
FIG. 1 is a side view of a management machine adopting the present invention.
FIG. 2 is a plan view of a handle base.
FIG. 3 is a side view of the reverse shift control device “ON” according to the present invention.
FIG. 4 is a side view showing a state of the reverse shift control device “OFF” of the present invention.
FIG. 5 is a partial front cross-sectional view showing a state in which the stopper pin of the reverse shift control device of the present invention is positioned in the fitting groove of the tilling hawk shaft.
FIG. 6 is a partial front sectional view showing a state where the stopper pin of the reverse shift control device is located at a low speed position of the tilling shaft.
FIG. 7 is a partial front sectional view showing a state in which a stopper pin of the reverse shift control device is located at a high speed position of the tilling hawk shaft.
[Explanation of symbols]
A Control Machine B Rotary Plowing Device 1 Reverse Shift Checking Device 5 Stopper Pin 6 Connecting Link 11 Rotating Guide Plate 19 Rotating Link 23 Mission Case 32 Handle 35 Travel Hawk Shaft 36 Tillage Hawk Shaft

Claims (1)

In the left and right direction of the mission case 23 of the management machine A, a traveling fork shaft 35 that performs a traveling shift and a tilling fork shaft 36 that performs a PTO shifting project in parallel so as to be slidable. The stopper pin 5 is disposed between the fitting groove 35a and the fitting groove 36a formed on the tillage hawk shaft 36 ,
The stopper pin 5 is configured to be slidable and insertable in a collar 4 fixed to the pivot shaft 2 and to be pivotable up and down around the pivot shaft 2.
When the handle 32 is placed on the rotary tiller B, the stopper pin 5 is inserted into the fitting groove 36a side of the tilling shaft 36 so that the tilling shaft 36 is not slidable. In the configuration provided with the reverse shift control device 1 that makes it impossible to
When the handle 32 of the management machine A is reversed to the side opposite to the rotary tiller B, a configuration for releasing the reverse shift check device 1 is provided,
The release mechanism locks one end of the rotation link 19 to one end of the stopper pin 5, the middle part of the rotation link 19 is pivotally supported by the pivot shaft 13, and the other end of the rotation link 19 is It is pivotally connected to one end of the articulating link 6,
The connecting link 6 is arranged vertically and can be pressed by a rotating guide plate 11 projecting from the side of the base of the handle 32 and connected by rotating the handle 32 to the opposite side of the rotary tiller B. A reverse shift control device for a management machine characterized in that the link 6 is pushed, the stopper pin 5 is pulled out from between the traveling fork shaft 35 and the tilling shaft 36 and the reverse shift control device 1 is released.

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