JP3185596U - Elevating wheel height adjustment device in management machine - Google Patents

Abstract

There is provided a height adjusting device for a lifting wheel of an agricultural management machine that can be easily and quickly adjusted to a predetermined position easily and quickly by a manual operation.
In a management machine having a drive wheel at the rear of a rotary and a lifting wheel for adjusting tillage depth arranged at the front, the management machine is arranged at the lower part of the machine body, and has a pivot part on the plate surface and a pivot part. Bracket 8 provided with a plurality of locking holes 11 on the same circumference centered at the center, and a pivotal support portion of an elevating wheel at the distal end, and a base end portion pivotally supported by bracket pivotal support 10. 11 is provided with an insertion hole 17 capable of communicating with 11, and a base end part is pivotally supported by the pivotal support part 10, a tip part projects forward along the arm, and an arm penetration hole is penetrated in the intermediate part. Then, an operating rod 15 provided with a retracting key 16 whose tip end protrudes and retracts into the bracket locking hole, and a spring 19 between the arm and the operating rod and biased in the direction of fitting the retracting key into the locking hole 11. It consists of.
[Selection] Figure 3

Description

  The present invention relates to a lifting / lowering wheel height adjusting device that determines the depth of tilling by rotary by moving a lifting wheel provided in front of a tilling rotary of an agricultural walking type management machine.

A conventional agricultural walking type management machine includes a steering handle at an upper part of a machine body including a power source, a transmission, a clutch, and the like, and a driving wheel and a tilling rotary at a lower part.
And, in order to adjust the depth of farmland plowing by the rotation of the rotary, an elevating wheel is mounted in front of the rotary and can be adjusted up and down, and when the elevating wheel is raised and adjusted to a high position, the rotary The farmland can be cultivated deeply, and when the lifting wheel is lowered, the rotary position is relatively raised so that the farmland can be cultivated shallowly.
Regarding the adjustment of the height of the lifting wheel, for example, the “walking-type tiller” of the following Patent Document 1 pivots an arm of a lifting wheel on a wheel bracket, swings the arm up and down, Thus, the height position of the elevating wheel can be adjusted by fixing the arm at an arbitrary position of the long groove provided in the wheel bracket.

JP 2006-191866 A

However, in the above-mentioned Patent Document 1, the height adjustment of the lifting / lowering wheel by the lifting / lowering fixture has a structure that can be arbitrarily set at any position with respect to the long groove. When the tightening with the lifting / lowering fixture is insufficient and is loose as much as possible, the lifting wheel receiving the load of the airframe easily shifts upward, making it difficult to reliably fix at any position.
SUMMARY OF THE INVENTION In view of the above circumstances, an object of the present invention is to provide a height adjusting device for a lifting wheel that can be easily and quickly adjusted to a predetermined position easily and quickly by manual operation.

In order to solve the above-mentioned problems, the invention according to claim 1 in the height adjusting device of the lifting wheel of the present invention is an agricultural walking-type management machine provided with a traveling drive wheel behind a tilling rotary at the lower part of the machine body. A bracket provided on the front side of the rotary, provided with a pivotal support on the plate surface and provided with a plurality of locking holes at a stepwise interval on the same circumference around the pivotal support; A pivot part for pivotally supporting the elevating wheel is provided, a base end part is pivotally supported on the pivot part of the bracket so as to be able to swing up and down, and a through-hole is provided which can communicate with the locking hole of the bracket. An arm and a base end portion pivotably supported by the pivot support portion so that the tip end portion protrudes forward along the arm, and a distal end portion penetrates an insertion hole of the arm at an intermediate portion, and An operation with an in / out key that enables intrusion into and out of the locking hole of the bracket. A rod, a spring tip portion of the retractable key provided by biased in a direction to fit against the locking holes between the arm and the operating rod consists of.
Then, the lifting wheel can be adjusted to any step height by the operation operation of the operation key to the engagement hole of the operation key and the vertical movement operation of the arm with the operation key removed from the engagement hole. It is characterized by that.

  According to a second aspect of the present invention, in the above-mentioned device, the bracket is formed in a left and right parallel bracket, the arm and the operation rod are pivotally attached to the pivotal support portions in both brackets, and the retracting key provided in the operation rod is provided. The rear end portion protrudes to the plate surface of the bracket, and a slide groove that allows the rear end portion of the retractable key to pass through is formed on the bracket surface facing the bracket surface having the locking hole. And

  According to a third aspect of the present invention, in the above-mentioned device, each of the locking holes is located above the reference line connecting the lowermost part of the elevating wheel and the lowermost part of the drive wheel without contacting the lowermost part of the rotary wheel. The rotary levitation stage locking hole positioned as described above, the shallow tillage stage locking hole positioned so that the lowermost part of the rotary is slightly below, and the lowermost part of the rotary are approximately half the length of the claw part. The middle tillage stage locking hole positioned as described above and the deep tillage stage locking hole positioned so that the rotary shaft of the rotary is positioned downward.

The lifting / lowering wheel height adjusting device according to the present invention is configured such that the operation rod moves into and out of the locking key, and the arm moves up and down while the locking key is removed from the locking hole. Thus, the lifting wheel can be adjusted to an arbitrary step height.
Since the operation of the in / out of the in / out key and the up / down movement of the arm are simple manual operations of “push” and “pull”, they can be performed quickly and easily.
At that time, the intrusion operation of the in / out key is performed with respect to the locking hole provided at a stepped height, the in / out key is urged by a spring and inserted into the locking hole, After the retractable key is inserted, it does not require tightening or the like, and even if there is some slack in the arm, it moves up and down and is securely fixed without causing any positional deviation.

According to the second aspect of the present invention, since the arm and the operating rod are constrained and pivotally mounted in the left and right parallel brackets, the arm and the operating rod are stably swung up and down without greatly shaking outward. It becomes possible.
Furthermore, since the rear end portion of the operation key of the operation rod is formed long and the rear end portion of the operation key is inserted into the slide groove formed in the bracket, the movable width of the operation key is increased. As a result, the retractable key can be inserted deeply and surely into the locking hole and can be reliably pulled out.
Further, by forming the slide groove so as to face the locking hole on the same circumference around the pivotal support portion of the bracket, the rear end portion of the retracting key is restrained and guided on both sides of the groove, It is possible to stabilize the movement in the circumferential direction around the pivoting portion of the retractable key bridged by the locking hole and the corresponding insertion hole and the slide groove.

In the invention according to claim 3, the rotary levitation stage locking hole, the shallow tillage stage locking hole, the middle tillage stage locking hole, and the deep tillage stage locking hole provided in order from the bottom of the bracket. The in / out key is inserted with a step, and the lifting wheel can be securely fixed without shifting up and down at each step.
At that time, if the elevating wheel is lowered to the lowest rotary levitation locking hole, the rotary lifts away from the ground, and the control machine can move smoothly without the rotary contacting the ground such as roads. Moreover, farmland can be cultivated according to the depth of each step by raising and lowering the lifting wheel from the shallow plowing step locking hole to the deep plowing step locking hole.

It is a perspective view which shows the use condition to a walk type management machine. (A) shows the state where the rotary is floating from the farmland, (b) shows the state where the rotary tillage is shallow, and (c) shows the state where the rotary wheel is shallow. It is a typical side view of the management machine of each use state which shows a state with deep tillage. It is the perspective view seen from the diagonally upper front of this invention. (A) of the present invention shows a state in which the leading end portion of the retracting key is inserted into the locking hole, and (b) is a plan view showing a state in which the leading end portion of the retracting key is removed from the locking hole. It is a side view of this invention.

In general, as shown in FIG. 1, a walking type management machine for agriculture is provided with a steering handle 2 protruding obliquely rearward at the upper part of a body equipped with a power source, a transmission, a clutch and the like. A driving wheel 3 for traveling, a rotary 4 provided with a rotary claw on a rotary rotary shaft for tillage, and a lifting wheel 5 for adjusting the tilling depth are arranged in order from the rear to the front of the body 1. Yes.
The present invention moves the height of the elevating wheel 5 projecting from the machine body 1 of the walking-type management machine obliquely downward toward the front side up and down, so that the nail of the rotary 4 of the elevating wheel 5 is applied to the farmland. This is a device for adjusting the depth at which the claws of the rotary 4 enter the farmland to be cultivated by the stopper function against subduction.
Embodiments of the present invention will be described below based on examples of the drawings.

As shown in FIG. 1, the driving wheel 3, the rotary 4, and the elevating wheel 5 are disposed in order from the rear to the front of the lower body 1 of the management machine.
The rotary 4 is supported at the center of the lower part of the body 1 of the management machine at the center of the rotary shaft, and a rotary mission cover 6 for transmitting the rotational force from the engine to the rotary shaft of the rotary 4 at the support part. It is equipped with a covered rotary drive mission.

As shown in FIG. 3, the rotary drive mission cover 6 is provided with two flanges 6 a and 6 a that are symmetrical with respect to each other with the flange surface facing the side of the machine body 1.
In addition, brackets 7 and 8 are set up on the flanges 6a and 6a of the rotary drive mission cover 6 in parallel to the left and right, respectively, and fixed with fixing screws 23.
If the transmission cover 6 has one flange at the center, a gap is provided around the flange and the brackets 7 and 8 are welded to the transmission cover 6 in parallel to the left and right, or bolts are attached to the flange. Can be fixed.

On the other hand, as shown in FIGS. 4A and 4B and FIG. 5, a pivotal support portion 14a for pivotally supporting the lifting wheel is provided at the tip, and the lifting wheel 5 is provided on the pivotal support portion 14a. The rear end of the arm 14 pivotally supported by the arm is firmly fixed by welding to the center of the distal end of the arm support 13 where the base ends 13a and 13b are bifurcated, and the base of the arm support 13 is fixed. Ends 13 a and 13 b are pivotally supported between the left and right brackets 7 and 8 of the body 1.
In order to pivotally support the base end portions 13a and 13b of the arm support portion 13 on the brackets 7 and 8, the left and right brackets 7 and 8 are provided with pivot support holes 9b and 9a, respectively. A pivot shaft 10 is inserted into the support holes 9b and 9a.
Further, reference numerals 20 and 21 in FIG. 4 denote pivot support holes 20 and 21 provided in the base end portions 13a and 13b of the arm support section 13, and the pivot support shaft 10 penetrates the pivot support holes 20 and 21. The arm support portion 13 is pivotally supported.

The right bracket 8 is provided with a plurality of locking holes 11a, 11b, 11c, and 11d in stages at regular intervals on the same circumference centered on the pivotal support portion of the arm support portion 13. .
Further, a through hole 17 is provided at a position corresponding to the locking hole 11 in an intermediate portion of the arm support portion 13.

An operating rod 15 is provided at the base end portion 15b with a pivot hole 22 between the pivot portions of the base end portions 13a and 13b which are divided into two forks of the arm support portion 13, and the pivot shaft 10 is interposed therebetween. And pivots up and down.
As shown in FIGS. 3 and 5, the intermediate portion of the operating rod 15 is increased in width, and the distal end portion 16a penetrates the through hole 17 of the arm support portion 13 in the intermediate portion, and An in / out key 16 that can enter and exit the fixing hole 11 is fixed.

Further, between the left base end portion 13 b of the arm support portion 13 and the operation rod 15, the operation rod 15 is attached in a direction in which the distal end portion 16 a of the retracting key 16 is inserted into the locking hole 11. A biased spring 19 is attached.
In FIG. 4, the spring 19 is shown mounted on the pivot shaft 10, but is separated from the pivot shaft 10 and between the left base end portion 13 b of the arm support portion 13 and the operation rod 15. You may provide directly.
In that case, various springs such as a coil spring and a leaf spring can be used as the spring 19 to be used.
FIG. 4 shows a mode in which the middle of the operation rod 15 is bent inward, but this is pushed by the spring 19 so that the operation rod 15 is moved toward the one base end 13 a of the arm support portion 13. Therefore, the operation rod 15 is provided to correct the distal end portion 15a side to the center side.

The present invention is configured as described above, and the operation rod 15 can easily perform the operation of moving the lock key 11 into the locking hole 11. How to adjust the height is explained in detail.
First, in FIG. 4A, when the tip 15a of the operating rod 15 is pushed to the right side of the figure with a finger, the tip 16a of the retracting key 16 is moved to the engagement position as shown in FIG. As shown in FIG. 5, the operating rod 15 can swing up and down around the pivot shaft 10 as indicated by a one-dot chain line and a solid line in FIG. 5.
At that time, since the key 16 of the operation rod 15 is inserted into the through hole 18 of the arm support portion 13, the arm support portion 13 can swing up and down together with the operation rod 15. It becomes.
That is, from the state in which the elevating wheel 5 provided at the tip of the arm 14 fixed to the arm support portion 13 is restrained from moving up and down by the retracting key 16 inserted into the locking hole 11, from the locking hole 11. The in / out key 16 is removed, the restriction on the vertical movement is released, and the vertical movement is made possible.

At this time, the spring 19 attached to the pivot shaft 10 continues to be urged in the direction in which the tip 16a of the retracting key 16 fixed to the operation rod 15 is fitted into the locking hole 11. By continuing to push in the direction in which the key 16 is removed from the locking hole 11 with the finger (right direction in FIG. 4), the plurality of locking holes 11 can be avoided and the entire vertical range can be swung.
After removing the retracting key 16 from the locking hole 11, when the operating rod 15 is slightly moved up and down, the retracting key 16 is removed from the locking hole 11. When the pressing in the direction of pulling out is stopped, the tip end 16a of the in / out key 16 abuts against the inner wall of the right bracket 8 by the spring 19, but when the operating rod 15 is moved up and down in this state, the right bracket 8 The inner wall surface is slid and the spring 19 is pressed into the locking hole 11 at the next stage.

  Accordingly, in order to adjust the height step by step, after removing the retracting key 16 from the locking hole 11, the operating rod 15 is slightly moved up and down, and the retracting key 16 is removed from the locking hole 11. The push-in / out key 16 slid on the inner wall surface of the right bracket 8 by moving the operating rod 15 up and down largely is stopped by pressing the spring 19 into the locking hole 11 at the next stage. The height adjustment of one step of the lifting / lowering wheel 5 is completed.

  Next, as to how to adjust the height beyond one step, after removing the in / out key 16 from the locking hole 11, the direction in which the in / out key 16 is extracted from the locking hole 11 with a finger (FIG. 4). While holding down in the right direction), the up / down key 16 is moved up and down until it exceeds the next step, and after that step, the pressing of the out / in key 16 from the locking hole 11 is stopped. Further, when the operating rod 15 is greatly moved up and down, the retracting key 16 that has slid on the inner wall surface of the right bracket 8 is automatically dropped into the locking hole 11 of the next stage by pressing of the spring 19, The one-step height adjustment of the lifting wheel 5 is completed.

When the height of the elevating wheel 5 is adjusted, as shown in FIG. 5, the lifting grip 24 fixed to the upper part of the brackets 7 and 8 is lifted so that the elevating wheel 5 is applied to the retracting key 16. The load on the machine body 1 is eliminated, the resistance for removing the retracting key 16 is eliminated, and the height of the elevating wheel 5 can be easily adjusted.
The lifting grip 24 can be easily operated by holding it with the left hand, holding the arm 14 with the right hand, and placing a thumb on the tip 15a of the operating rod 15.

  Also, as shown in FIGS. 4A and 4B, the rear bracket 16b has a rear end 16b facing the right bracket 8 on the side of the locking hole 11 from the side surface of the operating rod 15. 7 so that it extends long until it reaches 7, and a through hole 18 is provided in the middle of the arm support portion 13 so that the rear end portion 16b of the retracting key 16 passes through the through hole 18. Further, the right bracket 7 is possible to form a slide groove 12 having a width that allows the rear end portion 16b of the key 16 to pass therethrough.

In this embodiment, as shown in FIG. 4B, the rear end portion 16b of the retracting key 16 of the operation rod 15 is long, so that the rear end portion of the retracting key 16 is pushed when the operating rod 15 is pushed sideways. 16b protrudes through the slide groove 12. For this reason, it is possible to increase the movable width of the in / out key 16.
If the movable key 16 has a large movable width, the retractable key 16 can be surely inserted deeply into the locking hole 11 and can be reliably pulled out.

In this embodiment, the slide groove 12 can be wide open in an elliptical shape. For example, as shown in FIG. 5, the left bracket 7 is provided on the same circumference around the pivot shaft 10. Further, by providing the slide groove 12 facing the locking hole 11, the rear end portion 16b of the retracting key 16 can be restrained from moving in the direction of the pivotal support portion.
And the up-and-down key 16 bridge | crosslinked to the said locking hole 11, the corresponding insertion hole 17, and the said slide groove | channel 12 can be moved up and down stably.

  Further, the height position of each step of each locking hole 11 is relative to a reference line connecting the lowest part of the elevating wheel 5 and the lowest part of the driving wheel 3 as shown in FIGS. The claw tip which is the lowermost part of the rotary 4 is in contact with the lower part of the rotary 4 in order from the lower side of the left and right brackets 7, 8, and the claw tip which is the lowermost part of the rotary 4. The rotary part is located at a position where the part is slightly below, a position where the tip of the claw which is the lowermost part of the rotary 4 is about half the length of the claw, and a position where the rotation axis of the rotary 4 is below. The floating stage locking hole 11a, the shallow tillage stage locking hole 11b, the middle tilling stage locking hole 11c, and the deep tilling stage locking hole 11d can be set.

In this embodiment, as shown in FIG. 2A, when the retracting key 16 is inserted into the rotary levitation step locking hole 11a, the claw tip portion which is the lowest part of the rotary 4 is above the ground. It becomes. That is, a space A is created between the lowermost portion of the rotary 4 and the ground, and the space 4 is lifted. At this stage, it is possible to smoothly move the management machine without bringing the rotary 4 into contact with the ground.
Further, as shown in FIG. 2B, when the retracting key 16 is inserted into the shallow plowing step locking hole 11b, the claw tip portion which is the lowermost portion of the rotary 4 is slightly in the drawing from the ground. B below For this reason, it becomes possible to plow the surface of the farmland shallowly with the claws of the rotary 4.
Further, when the retracting key 16 is inserted into the middle tilling stage locking hole 11c, the claw tip part which is the lowest part of the rotary 4 is about half the length of the claw part. For this reason, it becomes possible to cultivate the farmland with the claws of the rotary 4 at a depth of about half of the claws.
Further, as shown in FIG. 2C, when the retracting key 16 is inserted into the deep plowing step locking hole 11d, the claw tip that is the lowermost portion of the rotary 4 is rotated from the rotary shaft of the rotary 4. Is also lower by C in the figure. At this position, all the claw portions of the rotary 4 are below the ground, and the farmland can be deeply cultivated.

  The lifting / lowering wheel height adjusting device of the present invention can be used for various management machines as long as it is a management machine equipped with a tillage rotary, other than the walking type management machine of the embodiment shown in the drawing. .

DESCRIPTION OF SYMBOLS 1 Airframe 2 Handle 3 Drive wheel 4 Rotary 5 Lifting wheel 6 Rotary drive mission cover 6a Mission cover flange 7 Left bracket 8 Right bracket 9a Pivot hole 9b Pivot hole 10 Pivot 10a Pivot 11 Locking Hole 11a Locking hole for rotary levitation stage 11b Locking hole for shallow tillage stage 11c Locking hole for middle tillage stage 11d Locking hole for deep tillage stage 12 Slide groove 13 Arm support part 14 Arm 14a Pivoting part 15 Operation rod 15a Operation rod 15a Tip portion 15b Base end portion of operation rod 16 Emerging / depressing key 16a Emerging / depressing key distal end portion 16b Emerging / retracting key rear end portion 17 Through hole 18 Through hole 19 Spring 20 Pivoting hole 21 Pivoting hole 22 Pivoting hole 23 Fixing screw 24 Lifting grip 25 Rotary cover

Claims (3)

In the management machine provided with a driving wheel for traveling behind the rotary for plowing at the lower part of the machine body, and a lifting wheel for adjusting the tilling depth arranged in front so that the height can be adjusted,
Arranged at the lower part of the fuselage in the vicinity of the rotary, a bracket provided with a pivotal support on the plate surface and provided with a plurality of locking holes at stepwise intervals on the same circumference centered on the pivotal support,
A pivot portion for pivotally supporting the elevating wheel is provided at the distal end portion, and a base end portion is pivotally supported on the pivot portion of the bracket so as to be able to swing up and down so as to communicate with the locking hole of the bracket. An arm with an insertion hole;
A base end portion is pivotally supported on the pivot support portion so as to swing up and down, a tip portion projects forward along the arm, a tip portion penetrates an insertion hole of the arm at an intermediate portion, and the bracket is engaged. An operation rod with an in / out key that allows intrusion to / from the blind hole;
And a spring provided by energizing the tip portion of the retracting key between the arm and the operation rod in a direction to be fitted into the locking hole. Height adjustment device.   The brackets are formed as left and right parallel brackets, and an arm and an operating rod are pivotally attached to the pivotal support portions in both brackets, and the rear end portion of the retractable key provided on the operating rod is projected to the plate surface of the bracket. The height of the elevating wheel in the management machine according to claim 1, wherein a slide groove through which a rear end portion of the in / out key can pass is formed on a bracket surface opposite to the bracket surface having a stop hole. Adjusting device.   A rotary levitation stage locking hole in which each locking hole is positioned so that the lowermost part of the rotary is not in contact with the reference line connecting the lowermost part of the elevating wheel and the lowermost part of the driving wheel, A shallow tillage stage locking hole positioned so that the lowermost part of the rotary is slightly below, a middle tilling stage locking hole positioned so that the lowermost part of the rotary is about half the length of the claw, and a rotary The height adjusting device of a lifting wheel in a management machine according to claim 1 or 2, comprising a locking hole for deep tillage stages positioned so that the rotation axis of the control shaft is downward.

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