JPH0551004U - Backlash removing device for top link support in tractor - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention is intended to provide a backlash removing device for a top link bracket of a top link support. [Structure] In a tractor in which a top link bracket is composed of a mounting plate and a pair of left and right plates which are integral with the mounting plate, and the top link bracket is connected to the top link support by two upper and lower pins, a pair of the top link supports is formed. A shaft rod inclined with respect to the top link support is fixed to the plate, and a regulation plate and a locking plate are movably fitted to the shaft rod, and the base of the regulation plate is between the plates of the top link bracket. The lock plate is contacted with the fixed member, the lock plate is connected to the regulation plate so as to be tiltable, and the lock plate is provided with an ammunition so that its hole engages with the shaft rod in a wedge shape. Backlash removal device for top link support in advanced tractors.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a rattling device for a top link support in a tractor in which a top link bracket is connected to a top link bracket with a pin.

[0002]

[Prior Art]

 Conventionally, in a tractor in which a top link bracket consisting of a pair of left and right plates is fixed to the rear surface of a machine body and a top link support is connected to the top link bracket by two pins, an upper and lower pin, between the upper and lower pins. A tractor in which a spring or rubber or the like is interposed to remove the backlash of the top link support is already known.

[0003]

[Problems to be solved by the device]

 In the backlash removing device of the top link support in the known tractor, after a long time, the spring or rubber deteriorates and the backlash removing action is lost, causing backlash again. When this happens, it was extremely difficult to replace the spring or rubber.

[0004]

[Means for Solving the Problems]

 According to the present invention, in a tractor in which a top link bracket is composed of a mounting plate and a pair of left and right plates that are integral with the mounting plate, and the top link support is connected to the top link bracket with two upper and lower pins, the pair of top link supports is connected. Is fixed to the top link support, and a restricting plate and a locking plate are movably fitted to the shaft bar, and the base of the restricting plate is a top link bracket. The locking plate is brought into contact with the fixing member between the plates, and the locking plate is connected so as to be tiltable with respect to the regulation plate. At the same time, a bullet is attached to the locking plate so that its hole engages with the shaft rod in a wedge shape. The above-mentioned problems were solved by applying pressure to.

[0005]

[Operation] When the top link support is attached to the top link bracket, the regulation plate, the locking plate, the shaft rod and the like are attached to the top link support, and this is attached to the top link bracket with the two upper and lower pins. .. Next, by pushing the locking plate to compress the ammunition and moving the rod toward the side closer to the bottom plate, the base of the regulation plate is brought into contact with the bottom plate, and when the compression of the ammunition is released, the locking plate is released. Is pushed by the bullet and its hole is wedge-engaged with the shaft rod so that the top link support does not vibrate with respect to the top link bracket. Also, when the top link support is removed and compressed by pushing the locking plate, the locking plate and the regulation plate can move with respect to the diagonal shaft rod, so move them so that the shaft rod moves away from the bottom plate. Then, the base of the regulation plate is separated from the bottom plate, and the pin is pulled out.

[0006]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 is a top link bracket in which the base portions of a pair of left and right plates 2 and 2 are welded to a mounting plate 3, which is not shown but is similar to a conventional one. The top link support 5 is mounted on the rear part of the tractor near the upper part of the rear surface of the transmission case. The top link support 5 includes a pair of left and right plates 5a and 5a and an upper connection plate 6a (not shown in FIGS. 1 and 2) and a lower connection plate. 6b, and a connecting pin insertion hole 7 for connecting the top link is formed in the rear part, and two holes are formed in the front part, two in the upper and lower parts. The connecting pins 8 and 8 are inserted into the two bored holes, and the spring pins 10 and 10 are removably inserted into the tips of the connecting pins 8 and 8. ..

The backlash removing mechanism of the top link support 5 is fixed between the base parts of the plates of the top link support 5 and is inclined with respect to them, and the side face of the lever plate 12a near the base part. A restriction plate 12 formed by welding an L-shaped plate 12b to the base plate, a locking plate 13 in which a protrusion 13a of the base is tiltably fitted into a hole 12b 'in a lateral portion of the L-shaped plate 12b, and the locking plate. 13 is constituted by a spring 15 for pressing the L-shaped plate 12b toward the L-shaped plate 12b. The lever plate 12a of the regulating plate 12 and the holes 16 formed in the L-shaped plate 12b and the hole 17 of the locking plate 13 are Both of them are fitted into the shaft rod 11, but the holes 16 and 16 are made as small as possible within the range in which sliding is allowed, and the hole 17 of the locking plate has a large diameter so as to tilt in a fitted state. And the spring 15 In the further pressed state, the outer peripheral circle of the hole 17 is pressed against the peripheral surface of the shaft rod 11 in a wedge shape. At this time, the protrusion 13a at the base of the locking plate 13 is welded to the rear surface of the mounting plate 3 to the bottom plate. Since it is received by 18, the top link support 5 is held in a state where there is no play with respect to the top link bracket 1.

When the top link support 5 is attached or detached, as shown in FIG. 1, the lever plate 12a and the rear portion of the locking plate 13 which are diagonally raised upward are pinched by the thumb and forefinger to lock the locking plate 13. When the lever plate 12a is substantially parallel to the lever plate 12a, the backlash removing mechanism is in the unlocked state, so that it is moved and set in the direction in which the distance between the mounting plate 3 and the shaft rod 11 becomes wider, and the connecting pin 8, The top link support 5 can be easily attached to and detached from the top link bracket 1 by inserting and removing 8. Further, if the backlash removing mechanism is loosened, the backlash removing mechanism can be surely removed by moving the backlash removing mechanism to the side where the interval is narrow.

FIGS. 7 to 8 show another backlash removing device, in which one plate 5a of the top link support 5 is welded with a tubular cam a having a forwardly inclined joint surface so that the joint surface faces rearward. The other cylinder cam b, which has become rough, is welded to the regulating plate c having a screw hole, and the bracket d is inserted from one side, the hole of the plate 5a that overlaps with it, and the bolt e inserted into the cylindrical cams a and b are regulated. When it is screwed into the screw hole of the plate c and tightened, the front end face of the regulation plate c overlaps with the bottom plate g which is integral with the mounting plate 3, so that the backlash can be removed.

9 to 11 show a traction resistance detection device for a tractor with a draft control. Therefore, conventionally, as shown in FIG. 11, a top link bracket 1 whose top is pressed forward by a top link 20 by traction resistance is shown. Is received by the leaf spring 21, and the lift arm 22 is moved up and down depending on the amount of rotation about the pin 1d to connect to one of the upper and lower holes 1a, 1b, 1c, and the weight of the plow 23 is The wheel 24 was loaded to increase the traction force. At that time, the top link 20 was connected to the upper hole 1a when the pulling resistance was large like in a hard field, and was connected to the lower hole 1c when the pulling resistance was small, but the operation is troublesome and adjustment is difficult. Although the result was gradual and the proper result was not obtained, as shown in FIG. 9, the front part of the cylindrical body 28 fixed to the upper part of the mounting plate 27 by receiving the upper front surface of the top link bracket 1 by the coil spring 25. When the adjusting bolt 26 is screwed into the screw portion of the and the coil spring 25 is fitted in the screw groove of the adjusting bolt 26, the adjusting bolt 26 is rotated and positioned by the lock bolt 30 and the lock nut 31. With this, it is possible to change the number of effective windings by which the coil spring 29 can expand and contract, and thereby the flexural load can be changed steplessly and the top link 2 As possible out is possible to omit the attachment and detachment operation.

12 and 13 show a tractor having a side guide 32, in which the front part of the side guide 32 is attached to a frame on the outer front lower part of the operation step 33, and the rear part thereof is a rotary tiller 23. It is held by a locking tool 34 on the outer front part of the above, and an auxiliary step 35, which is slightly lower than the operation step 33, is attached to the front inclined part of the side guide 32. 37 is a check chain.

[0012]

[Effect of the device]

 The present invention relates to a tractor in which a top link bracket 1 is composed of a mounting plate 3 and a pair of left and right plates 2 and 2 which are integral with the mounting plate 3, and a top link support 5 is connected to the top link bracket 1 by two pins, an upper and a lower. A shaft rod 11 inclined with respect to the top link support 5 is fixed to a pair of plates of the top link support 5, and a regulating plate 12 and a locking plate 13 are movably fitted to the shaft rod 11. The restricting plate 12 has its base abutting against the fixing member between the plates of the top link bracket 1, the locking plate 13 is connected to the restricting plate 12 so as to be tiltable, and the locking plate 13 is used as a bullet. Since a pressurizing mechanism is provided because pressure is applied to the shaft rod 11 so that the hole engages with the shaft rod 11 in a wedge shape, the base of the regulating plate 12 fitted to the shaft rod 11 is a fixing member. Receiving and locking plate 13 With its base fitted to the regulation plate 12, it is pressed against the inclined shaft rod 11 in a wedge shape by an ammunition, thereby reliably eliminating the backlash of the top link support 5 with respect to the top link bracket 1. In addition to being able to maintain that state for a long period of time. Moreover, even if there is a manufacturing error in the top link bracket 1 or the top link support 5, it is possible to reliably remove the backlash by changing the mounting positions of the restriction plate 12 and the locking plate 13 of the backlash removing mechanism with respect to the inclined shaft rod 11. It can be carried out. Also, the top link support can be easily attached and detached.

[Brief description of drawings]

FIG. 1 is a plan view of a top link support mounting device with a backlash removing mechanism unlocked.

FIG. 2 is a plan view of the same lock state.

FIG. 3 is a vertical side view of the same.

FIG. 4 is a front view of a backlash removing mechanism.

FIG. 5 is a plan view of the same.

FIG. 6 is a side view of the same.

FIG. 7 is a plan view showing another example.

FIG. 8 is a side view of the same.

FIG. 9 is a side view of a tractor equipped with a traction resistance detector.

FIG. 10 is a vertical sectional view of a traction resistance detector.

FIG. 11 is a side view of the conventional same detector.

FIG. 12 is a side view of a tractor equipped with a side guide.

FIG. 13 is a plan view of the same.

[Explanation of symbols]

 1 Top link bracket 3 Mounting plate 5 Top link support 11 Shaft rod 12 Control plate 13 Locking plate 15 Spring

Claims (1)

[Scope of utility model registration request] 1. A top link bracket 1 and a mounting plate 3
And a pair of left and right plates 2 and 2 integrated with the top link support 1, and a top link support 5 is connected to the top link bracket 1 by two upper and lower pins. The tilted shaft rod 11 is fixed to the top link support 5, and the restricting plate 12 and the locking plate 13 are movably fitted to the shaft rod 11, and the base of the restricting plate 12 is of the top link bracket 1. Boards 2, 2
The locking plate 13 is connected to the regulating plate 12 so as to be tiltable and a bullet is attached to the locking plate 13 so that the hole thereof engages with the shaft rod 11 in a wedge shape. A backlash removing device for a top link support in a tractor characterized by pressurizing so as to match.