JP2006238790A - Paddy working machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a paddy working machine designed to compactly house a torsion bar in a machine body and to obtain the torsion bar in an advantageous state from aspects of handling, etc., though mutually opposite lifting and lowering of a right and a left wheels relatively to the machine body frame are regulated with the torsion bar. <P>SOLUTION: A left wheel support 10 and a right wheel support 10 are each separately freely shakingly liftably and lowerably supported on a transmission case 21 composing the machine body frame 20 and the torsion bar 60 is connected to the left wheel support 10 and right wheel support 10. The torsion bar 60 is arranged so as to pass through a gap between a grounding float 5 and a transmission case 23 composing the machine body frame 20. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention allows the left wheel support for supporting the left wheel and the right wheel support for supporting the right wheel to swing up and down to the body frame so that the left and right wheels are lifted and lowered separately from the body frame. It is related with the paddy field machine provided with the earthing | grounding float arrange | positioned under the said body frame.

  The above paddy field machine is in a state where the left and right wheels are raised and lowered against the machine frame against the machine frame and the machine body is horizontal or close to the left and right direction even if there is a tilt or a step in the machine horizontal direction on the cultivator or traveling ground. It is possible to be maintained.

  In this type of paddy field machine, there has been conventionally provided a torsion bar 13 connected to wheel cases 7 and 8 as left and right wheel supports, as disclosed in Patent Document 1, for example.

Japanese Utility Model Publication No. 50-9417 (page 3, FIG. 2)

  In the above paddy field machine, if a torsion bar that is connected to the left and right wheel supports is a torsion bar that passes above the machine frame, the machine body will prevent the torsion bar and the machine frame from interfering even if the wheels descend to the machine frame. It is necessary to provide the torsion bar with a bent portion that detours the frame upward, and when the wheel rises to the aircraft frame, a situation has occurred in which the bent portion of the torsion bar rises to a higher position.

  The object of the present invention is to accommodate the torsion bar in a compact manner while allowing the torsion bar to regulate the upside down movement of the left and right wheels and to apply a restoring force to the raised and lowered wheels by the torsion bar. The purpose is to provide a paddy field machine that can do this.

According to the first aspect of the present invention, the body frame is arranged such that the left and right wheels are lifted and lowered separately from the body frame with respect to the left wheel support that supports the left wheel and the right wheel support that supports the right wheel. In a paddy field work machine equipped with a grounding float that is swingably raised and lowered and arranged below the machine frame,
A torsion bar connected to the left wheel support and the right wheel support in a state of being disposed so as to pass between the ground float and the body frame.

  That is, when the left and right wheels are lifted upside down, the torsion bar connects the left wheel support and the right wheel support so that the left and right wheel supports are lifted upside down and the left and right wheels are not lifted up and down excessively. regulate. In addition, the torsion bar is elastically deformed to swing and urge the left and right wheel supports to apply a restoring force to return the original height to the left and right wheels.

  Because the torsion bar passes between the ground float and the fuselage frame, even if the torsion bar is equipped with a bent portion that avoids interference between the torsion bar and the fuselage frame when the wheel rises against the fuselage frame, the torsion bar is not much The left and right wheels can be raised and lowered while not rising to a high position.

  Therefore, according to the first aspect of the invention, the action of the torsion bar regulates the upside down movement of the left and right wheels, or applies a restoring force to the up and down left and right wheels, so Regardless of the fact that the airframe can be stably driven, the torsion bar can be accommodated in a compact manner so as not to rise to a high position, and an advantageous state in terms of handling can be obtained.

  In the second invention, in the configuration of the first invention, the intermediate portion of the torsion bar in the lateral direction of the machine body is more than the end connected to the left wheel support and the right wheel support. The torsion bar is bent in a bent state located at a low arrangement height.

  That is, when the left and right wheels are lifted upside down, the torsion bar can be elastically deformed to the extension side at the bent portion to allow the left and right wheels to move upside down. Further, when the wheel rises against the aircraft, it is possible to avoid the interference between the torsion bar and the aircraft frame by bending the torsion bar, and to raise the wheel higher by that amount.

  Therefore, according to the second aspect of the invention, the torsion bar has a shape that allows the wheels to rise up to a higher level and allows the vehicle to run advantageously, while allowing the left and right wheels of the torsion bar to move upside down. The structure can be easily obtained by utilizing the means for avoiding the interference of the airframe.

  According to the third aspect of the invention, in the configuration of the first or second aspect of the invention, a balance link that is swingable with respect to the body frame is provided, one of the left and right wheels is lowered to the body frame, and the other is A pair of connecting members are provided for connecting the both ends of the balance link separately to the left wheel support and the right wheel support so that the balance link swings as the machine frame rises, A buffer mechanism is provided on one of the pair of connecting members to provide resistance to relative swinging of the connecting member and the balance link.

  That is, when the left and right wheels are lifted upside down, the balance link and each connecting member swing relative to each other. At this time, the shock absorbing mechanism acts to give resistance to the relative swinging of the balance link and one of the connecting members, and acts to alleviate running vibration in both the left wheel and the right wheel.

  Therefore, according to the third aspect of the present invention, the shock absorbing mechanism can be applied to the left and right wheels so that the vehicle can travel stably, but a simple structure in which the shock absorbing mechanism is provided on one of the connecting members is inexpensive. Can get to.

  In the fourth aspect of the present invention, in any one of the first to third aspects of the present invention, an adjustment mechanism is provided that moves and adjusts the balance link so that the left and right wheels integrally move up and down the machine frame. .

  That is, when the adjustment mechanism is operated, the adjustment mechanism moves the balance link, and the balance link swings the left wheel support body and the right wheel support body through a pair of interlocking members, thereby moving the left and right wheels together to the body frame. To move up and down.

  Therefore, according to the fourth aspect of the invention, by operating the adjustment mechanism, the height of the aircraft can be adjusted by moving up and down so that both the left and right wheels move up and down.

Embodiments of the present invention will be described below with reference to the drawings.
As shown in FIGS. 1 and 2, a driving portion including an engine 2 for transmitting power to the wheel 1 and the like, and a fuel tank 3 for the engine at a front end portion of a traveling body that self-runs by a pair of right and left driveable wheels 1. And a control unit A provided with a control handle 4 extending rearward from the machine frame 20 of the traveling machine body, four seedling planting mechanisms 31 arranged in the lateral direction of the traveling machine body, and the like. A seedling planting work section 30 provided is provided, and is divided into a center grounding float 5 and a laterally outer side of the left and right wheels 1, 1 disposed below the vehicle frame 20 between the left and right wheels 1, 1. A pair of left and right side ground floats 6 positioned on the left and right wheels 1, 1 is supported by a traveling machine body via a support 8 with a stand 7 placed above the left and right wheels 1 and 1, and can be planted four times. Is configured.

  This rice transplanter performs planting of rice seedlings. When the hydraulic lift cylinder 9 positioned below the engine 2 is expanded and contracted, the lift cylinder 9 moves the left and right wheels 1 to the body frame 20 of the traveling machine body. By swinging and moving up and down, the traveling machine body is moved up and down into a descending working state in which the grounding floats 5 and 6 are grounded on the surface, and an ascending non-working state in which the grounding floats 5 and 6 are separated from the surface. Manipulate. When the traveling machine body is moved in the descending operation state, the grounding floats 5 and 6 slide on the surface of the field to level the ground. In the seedling planting work section 30, the four seedling planting mechanisms 31 include the seedling planting mechanism 31. A block of seedlings was taken out from the mat-like seedlings placed on the seedling placing table 32 that was reciprocated in the lateral direction of the traveling body in conjunction with the seedling planting movement, and was grounded by the ground contact floats 5 and 6 on the paddy surface. I will plant it in the place.

  As shown in FIG. 2, a transmission case 21 provided near the rear of the engine 3 at the front of the traveling machine body, an engine mounting frame 22 extending forward from the front of the transmission case 21, and from the rear of the transmission case 21. A transmission case 23 made of a square steel pipe extending rearward, a planting mission case 24 connected to the rear end of the transmission case 23, and extending laterally outward from the lateral sides of the planting mission case 24 The fuselage frame 20 is constituted by a cylindrical transmission case 25 and a planting drive case 26 connected to the extending end of each transmission case 25, and the engine 2 is mounted on the upper surface side of the engine mounting frame 22. The seedling planting mechanism 31 is provided on both sides of the planting mission case 24 and on the inside of each planting drive case 26. It is provided to freely drive.

  As shown in FIGS. 1 and 2, the steering handle 4 includes a base-side handle rod 4 a made of a square steel pipe member extending from both lateral sides of the planting mission case 24 toward the rear and upward of the traveling vehicle body, It is comprised by the front end side handle bar 4b which consists of a circular steel pipe material which was fixed to the extension end part of the base side handle bar 4a, and was provided with a pair of right and left grip parts.

  As shown in FIG. 2, the left and right wheels 1 are distributed to a pair of left and right wheel drive cases 10, 10 that are extended from the mission case 21 toward the traveling vehicle body, and the wheel supports 10. Is supported on the lateral outer surface side of the traveling machine body of the extended end portion.

  As clearly shown in FIG. 3, the base portion of each wheel support body 10 is rotatably connected to a support portion 21 a protruding from the lateral side surface of the transmission case 21, and a pair of wheel support bodies 10. The left wheel support body 10 that supports the left wheel 1 and the right wheel support body 10 that supports the right wheel 1 are connected to the transmission case 21 around the axis X of the support portion 21a facing the traveling machine body. On the other hand, the left and right wheels 1, 1 are swung up and down individually with respect to the body frame 20 by swinging up and down separately.

  As shown in FIGS. 1, 3, and 4, an intermediate portion is rotatably connected via a connecting pin 40 to a piston rod 9 a that protrudes rearward from the cylinder tube of the elevating cylinder 9. A balance link 41 is provided below the engine 2 so as to swing in the front-rear direction with respect to the body frame 20 around the vertical axis Y of the traveling body 40. One end of the balance link 41 is mounted on the engine. Extending from the base of the left wheel support 10 is the left end of the balance link, which is inserted through the through hole 22a on the left side of the frame 22 and located on the left side outside of the traveling body from the engine mounting frame 22. Is connected to the operating arm 42 by a hook-like interlocking member 43 facing the traveling body, and the other end side of the balance link 41 is the through hole 2 on the right side of the engine mounting frame 22. The right link portion of the balance link, which is inserted through a and located on the right lateral outer side of the traveling body from the engine mounting frame 22, is connected to the operation arm 42 extending from the base portion of the right wheel support 10 on the left side. The interlocking member 43 similar to the member 43 is interlocked and connected.

  As shown in FIGS. 4 and 5, the balance link 41 is divided and arranged on both the upper and lower sides of the end of the piston rod 9 a of the elevating cylinder 9, and the end of the piston rod 9 a is connected via the connecting pin 40. The middle part is constituted by a pair of upper and lower link pieces 41a that are rotatably connected. Both end sides of the pair of upper and lower link pieces 41a are connected by connecting pins 44 that are inserted through the end portion of the balance link 41 and the front end portion of the interlocking member 43 so as to be relatively rotatable. The link pieces 41a, 41a rotate integrally around the axis Y of the connecting pin 40.

  As shown in FIG. 4, a buffer device 50 including buffer springs 51, 52 formed of a pair of coil springs is provided on one interlock member 43 of the pair of left and right interlock members 43.

  As shown in FIGS. 4, 5, and 6, the shock absorber 50 is a support made of a metal plate fixed to the end of the piston rod 9 a between a pair of upper and lower link pieces 41 a and 41 a of the balance link 41. 53, a spring support rod 54 in which a connecting portion 54a is rotatably connected to the support 53, and is configured to be movably fitted to the spring support rod 54 and fixed to the intermediate portion of the interlocking member 43. The spring pressing member 55, the one buffer spring 51 mounted on the spring supporting rod 54 in a state of being disposed between the spring pressing member 55 and the connecting portion 54a of the spring supporting rod 54, and the spring supporting rod 54 In a state where it is arranged between a spring receiving body 56 fixed to the end opposite to the side where the connecting portion 54a is located and the spring pressing body 55. Mounted on the supporting rod 54 are then configured with the other buffer spring 52.

  When the balance link 41 and the interlocking member 43 swing relative to each other, the spring pressing body 55 moves relative to the spring support rod 54 in the longitudinal direction of the spring support rod 54 and presses against one of the buffer springs 51, or the other. The buffer spring 52 is pressed. Accordingly, the balance link 41 and the interlocking member 43 are relatively swung to the side where the left and right wheels 1 and 1 are moved up and down with respect to the body frame 20 and the intersection angle B (see FIG. 4) of the balance link 41 and the interlocking member 43 is reduced. Then, the shock absorber 50 is compressed and elastically deformed by pressing one shock spring 51 against the connecting portion 54a of the spring support rod 54 by the spring pressing body 55, and thereby the relative swinging of the balance link 41 and the interlocking member 43. A resistance is given by a buffer spring 51. When the balance link 41 and the interlocking member 43 are relatively swung to the side where the crossing angle B of the balance link 41 and the interlocking member 43 increases, the shock absorber 50 causes the other buffer spring 52 to be moved by the spring pressing body 55 to the spring support rod 54. The spring receiver 56 is pressed and elastically deformed by being pressed, whereby a resistance is given by the buffer spring 52 to the relative swinging of the balance link 41 and the interlocking member 43.

  As shown in FIGS. 2, 7, 8, etc., a torsion bar 60 disposed so as to pass laterally between the center grounding float 5 and the transmission case 23 of the body frame 20 is provided on the left wheel support body. 10 fixed to the base side of the support member 12 and connected to the support member 12 fixed to the base side of the right wheel support 10.

The torsion bar 60 is bent in the bent state shown in FIG. That is, the intermediate portion 61 of the torsion bar 60 in the lateral direction of the traveling machine body is connected to the end portion 62 connected to the support member 12 of the left wheel support 10 and the support member 12 of the right wheel support 10. It is bent and formed in a bent state located at an arrangement height lower than the end 62.
That is, when the left wheel support 10 and the right wheel support 10 swing up and down in a contradictory manner, the torsion bar 60 is elastically deformed to the extension side by the bent portions 63 on both sides of the intermediate portion 61, and the both wheel support 10 , 10 can be raised and lowered. When the two wheel supports 10 and 10 are lifted with respect to the body frame 20, the torsion bar 60 has a concave shape that opens upward in the body of the intermediate portion 61 and the transmission case 23 and the torsion bar 60 of the body frame 20. The two wheel supports 10 and 10 can be raised as high as possible. When the both wheel supports 10, 10 are lowered with respect to the body frame 20, the torsion bar 60 has both the wheel supports 10, 10 when the intermediate portion 61 enters the recessed portion 5 a on the upper surface side of the center ground float 5. Makes it possible to descend as low as possible.

  That is, when the elevating cylinder 9 is telescopically operated, the elevating cylinder 9 moves the balance link 41 in the longitudinal direction of the traveling machine body, and the balance link 41 moves the left wheel support 10 via the left interlocking member 43 to the right interlock. The right wheel support 10 is swung up and down with respect to the transmission case 21 around the axis X through the member 43, and the left and right wheels 1 and 1 are moved up and down in the same direction with respect to the body frame 20. As a result, the traveling machine body descends to the descending working state or rises to the ascending non-working state. Moreover, the ground height of the traveling machine body can be adjusted.

  In addition, if there is an inclination or a step in the lateral direction of the traveling machine body on the cultivator or the traveling ground, the left wheel support body 10 and the right wheel support body 10 have the balance link 41 as the axis due to the ground reaction force acting on the wheel 1. While swinging around Y, it moves up and down against the mission case 21 around the axis X, one of the left and right wheels 1 and 1 descends relative to the body frame 20 and the other ascends relative to the body frame 20 Thus, the left and right wheels 1 and 1 move up and down against the airframe frame 20, and the torsion bar 60 and the buffer mechanism 50 regulate and relax the back and forth vibration and vertical vibration of the left and right wheels 1 and 1. Can be driven while maintaining a horizontal state or a state close to it in the lateral direction of the traveling machine body regardless of the inclination or level difference of the cultivator or the traveling ground, and while mitigating traveling vibration transmitted to the traveling machine body.

  As shown in FIGS. 3 and 4, a telescopic adjustment screw portion 45 is provided on the front end side of the one connecting member 43. The expansion / contraction adjustment screw portion 45 is rotated and adjusted so as to be screwed with respect to the connecting member 43 to connect the balance link 41 of the connecting member 43 and the operation arm 42 of the wheel support 10. The height of the left and right wheels 1 is adjusted so that the height of the left and right wheels 1 is the same when the balance link 41 is in the standard posture. It has become. Further, when the expansion adjustment screw portion 45 is rotated, the head portion 45 a of the expansion adjustment screw portion 45 rotates relative to the connection portion 41 b of the balance link 41.

[Another Example]
Instead of the elevating cylinder 9, a screw mechanism is provided so as to be rotatable by a motor, and the balance link 41 is moved by a telescopic operation of the screw mechanism, or a screw mechanism is provided that can be operated manually. In addition, it may be implemented by adopting a configuration in which the balance link 41 is moved and operated by extending and contracting the screw mechanism. The screw mechanism and the like are collectively referred to as an adjustment mechanism 9.

  The present invention can be applied to working machines that perform various operations in paddy fields, such as a seeding machine for directly sowing seed potatoes on the rice field, in addition to rice transplanters, and these rice transplanting machines, sowing machines, etc. are collectively referred to as paddy field working machines. Call it.

Side view of walking type rice transplanter Plan view of the fuselage frame Plan view showing wheel support structure Plan view of support structure of balance link Side view of balance link and support structure Cross section of shock absorber Side view of torsion bar placement Front view of torsion bar placement

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wheel 5 Grounding float 9 Adjustment mechanism 20 Airframe frame 41 Balance link 43 Connecting member 60 Torsion bar 61 Intermediate part of torsion bar 62 End part of torsion bar

Claims (4)

A left wheel support that supports the left wheel, and a right wheel support that supports the right wheel are swingably connected to the airframe so that the left and right wheels are raised and lowered separately from the airframe. A paddy field work machine provided with a grounding float disposed below the body frame,
A paddy field work machine comprising a torsion bar connected to the left wheel support and the right wheel support in a state of being disposed so as to pass between the ground float and the machine frame.   The torsion bar is bent and formed in a bent state in which an intermediate portion of the torsion bar in the lateral direction of the machine body is located at a lower arrangement height than ends connected to the left wheel support and the right wheel support. The paddy field machine according to claim 1.   A balance link swingable with respect to the body frame is provided, and the balance link is swung so that one of the left and right wheels is lowered to the body frame and the other is raised to the body frame. A pair of connecting members are provided for connecting both ends of the link to the left wheel support and the right wheel support separately, and one of the pair of connecting members is connected to the connecting member and the balance link. The paddy field work machine according to claim 1 or 2, further comprising a buffer mechanism for imparting resistance to relative swinging.   4. The paddy field work machine according to claim 3, further comprising an adjustment mechanism for moving and adjusting the balance link so that the left and right wheels move up and down integrally with the machine frame.

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