JP2004154054A - Farming implement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a farming implement miniaturized in the main body by collectively disposing a walking control lever, a tension clutch and a brake member on the front portion of the body. <P>SOLUTION: The farming implement has the following scheme: A belt transmission unit 60 includes a wrapping belt 58 wound between a driving pulley 54 fixed on the output shaft 20a of an engine 20 disposed on the front portion of the body and a driven pulley 56 fixed on the input shaft 22a of a transmission 22 disposed on the front portion of the body, and is coordinated so as to let a tension clutch 62 in/out to make the wrapping belt 58 tense/lax based on the operation of the walking control lever 50 set on the front portion of the body; wherein the walking control lever 50, the tension clutch 62, etc. are collectively disposed on the front portion of the body with the brake member 82 at the driven pulley 56 side ensured to set in motion interlockingly with letting the tension clutch 62 out. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an agricultural work machine such as a riding rice transplanter, and more particularly, to an agricultural work machine in which a walking operation tool and a tension clutch in a belt transmission are combined.
[0002]
[Prior art]
2. Description of the Related Art In an agricultural work machine such as a riding rice transplanter, a steep ridge may be crossed when the machine enters or exits a field. At the time of crossing the ridge, the body is largely inclined forward and backward. In such a case, it is preferable that the operator can operate the vehicle with the vehicle getting off. In addition, when the aircraft is moved to a remote place, the aircraft may be transported by loading it on a carrier such as a truck. It is desirable that the aircraft be able to travel on a crossing plate (inclined plate).
[0003]
On the other hand, a technique is known in which a walking operation tool that can be operated after getting off the vehicle is provided at the front of the agricultural work machine. For example, according to Patent Literature 1, a belt transmission that transmits the output of an engine to a transmission case side can be operated by a shift lever that can be operated from a boarding position and a walking operation tool that can be operated from a dismounting position. Is disclosed. Further, according to Patent Literature 2, in a state where the walking operation tool is operated to the traveling position, the distance between the tip end thereof and the axis of the front wheel is made larger than the distance between the axis of the front wheel and the axis of the rear wheel. There has been disclosed a technology in which a walking operation tool is pressed down in a state and lifting of a front portion of the body can be suppressed.
[0004]
[Patent Document 1]
JP-A-6-70623 [Patent Document 2]
JP 2000-135509 A
[Problems to be solved by the invention]
However, according to Patent Literature 1 in which a walking operation tool that can be operated in a dismounting state is provided, the driving force is turned on / off by interlocking a clutch pedal with the walking operation tool by a linking mechanism, and a brake mechanism is also separately provided behind the transmission. Because it was provided, the structure became complicated and the body became large, and also in Patent Document 2, the brake mechanism was provided separately from the operation of the walking operation tool, so the structure became complicated, and the body was There was a problem of increasing the size.
[0006]
The present invention has been made to solve such a problem, and an object of the present invention is to reduce the size of a work machine main body by centrally disposing a walking operation tool, a tension clutch, and a brake member at a front portion of the machine body. An object of the present invention is to provide an agricultural working machine that can be designed.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 includes an output shaft (20a) of an engine (20) disposed at a front part of the body and an input shaft (22a) of a transmission (22) disposed at a front part of the body. ), And is wound around a driving pulley (54) provided on the output shaft (20a) side and a driven pulley (56) provided on the input shaft (22a) side. An agricultural work machine (10) including a belt transmission (60) having (58),
A tension clutch (62) for rollingly contacting the wrapping belt (58) to tension and relax the wrapping belt (58);
A walking operation tool (50) provided at the front of the body and operated by getting off;
A link mechanism (70) for linking the walking operation tool (50) and the tension clutch (62);
A brake member (82) interlockingly connected to the linkage mechanism (70) and disposed close to the driven pulley (56);
Based on the operation of the walking operation tool (50), the tension clutch (62) is turned on / off via the linkage mechanism (70), and substantially interlocked with the disengagement operation of the tension clutch (62). The brake member (82) operates to apply a braking action to the driven pulley (56).
[0008]
[Action]
In the present invention, the belt transmission (60) includes a drive pulley (54) provided on the output shaft (20a) side of the engine (20) disposed at the front of the fuselage, and a transmission disposed at the front of the fuselage. It has a driven pulley (56) provided on the input shaft (22a) side of (22), and a wrapping belt (58) wound there between. Then, based on the operation of the walking operation tool (50) provided at the front of the body, a tension clutch (62) for tensioning and relaxing the wrapping belt (58) is connected so as to perform an on / off operation, and the tension is adjusted. The walking member (50) and the tension clutch (62) are actuated by operating the brake member (82) disposed in proximity to the driven pulley (56) substantially in conjunction with the disengagement operation of the clutch (62). And the brake member (82) is centrally arranged in the front part of the fuselage.
[0009]
In addition, the code | symbol in parenthesis mentioned above is for referring to drawings, and does not limit this invention at all.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0011]
FIG. 1 is an overall side view of a riding rice transplanter as an agricultural working machine according to the present invention. The riding rice transplanter 10 has a traveling machine body 16 supported by a front wheel 12 and a rear wheel 14, and the traveling machine body 16 has an engine 20 mounted in a front hood 18. A steering unit 24 having a steering handle 24, a seat 26, various operation levers and the like is disposed on the traveling body 16. A stepped surface of the operation unit 28 includes a clutch pedal 30 and a brake pedal. (Not shown) are provided.
[0012]
At the rear of the engine 20, a transmission 22, which is integral with the engine 20, and on which the front wheels 12 are supported, is mounted. The power of the engine 20 is input to the transmission 22 via a belt transmission 60 described later. Have been. The power input to the transmission 22 is transmitted to the front wheels 12 after being shifted by the transmission 22, and is also transmitted to the rear wheels 14 via a traveling PTO shaft (not shown). Further, power for work is transmitted from a rear portion of the transmission 22 to a planting section 34 described later via a planting PTO (not shown).
[0013]
At the rear of the traveling machine body 16, a planting portion 34 is supported via a link mechanism 35 so as to be able to move up and down. A large number of planting rods 36, floats 37 and mat seedlings are mounted on the planting portion 34. A seedling mounting table 38 that can be placed is provided. The planting section 34 is controlled to move up and down by a telescopic operation of a hydraulic cylinder device (not shown).
[0014]
A main frame 40 extends in the front-rear direction on both left and right sides of the fuselage, and a front portion of the main frame 40 is connected to an engine base (not shown), and the engine 20 is mounted on the engine base. . A rotation fulcrum shaft 52 supported by the main frame 40 and extending in the left-right direction of the machine is provided at a lower front part of the hood 18. The rotation fulcrum shaft 52 is provided with a walking operation lever (walking operation tool) 50 that is rotatable around the rotation fulcrum shaft 52 back and forth. The walking operation lever 50 is provided at the front of the body, can be operated after getting off the vehicle, and can be switched between running and stopping the body by swinging operation.
[0015]
When the walking operation lever 50 is rotated forward (C 'side in the figure), the traveling clutch is engaged and the aircraft is switched to the traveling side, as will be described later. When the hand is released from the operated position, it automatically returns to the original position by the urging pressure of the spring (C side in the figure), the traveling clutch is disengaged, and the aircraft is switched to the traveling stop side.
[0016]
FIG. 2 is a cross-sectional side view of the front part of the riding rice transplanter 10. The riding rice transplanter 10 is provided with a belt transmission 60, and the belt transmission 60 is provided with the engine 20 disposed at the front part of the machine body. It has a wrap belt 58 that connects between the output shaft 20a and the input shaft 22a of the transmission 22 disposed at the front of the fuselage. The wrapping belt 58 is wound between a driving pulley 54 provided on the output shaft 20a side and a driven pulley 56 provided on the input shaft 22a side.
[0017]
In the present embodiment, a tension clutch 62 that rolls and comes into contact with the wrapping belt 58 to tension and relax the wrapping belt 58, a walking operation lever 50 provided at the front of the fuselage and operated by getting off the vehicle, It includes a link mechanism 70 for linking the walking operation lever 50 and the tension clutch 62, and a brake member 82 operatively linked to the link mechanism 70 and arranged close to the driven pulley 56.
[0018]
That is, in the walking operation lever 50, the connecting piece 51 is integrally fixed to the turning base side, and the connecting piece 51 is rotatably mounted on the turning fulcrum shaft 52. Thus, when the walking operation lever 50 is rotated forward of the body, the tension clutch 62 is engaged through the linkage mechanism 70 described later, and the body travels.
[0019]
The tension clutch 62 has a tension arm 66 that can swing about a swing fulcrum 64 and a tension pulley 68 that is in rolling contact with the winding belt 58 and tensions and relaxes the winding belt 58. The tension clutch 62 and the walking operation lever 50 are linked by a linking mechanism 70. The tension arm 66 is constantly urged clockwise in FIG. 2 around the swing fulcrum 64 by the urging force of the torsion spring 67.
[0020]
A projecting piece 53 protrudes from the connecting piece 51 on the rotation fulcrum shaft 52 side of the connecting piece 51. The linking mechanism 70 includes a swing arm 44 that swings back and forth around the fulcrum shaft 42 attached to the main frame 40, and a pin 46 a between one end of the swing arm 44 and the projecting piece 53. , 46b, and the other end of the swing arm 44 is engaged with a groove 49 formed in the tension arm 66 via a pin 48.
[0021]
On the other hand, a main transmission lever 71 is provided on the control unit 28, and a lever cam 72 fixed integrally to the main transmission lever 71 is rotatable about a rotation fulcrum 73. And a clutch cam 75 slidably in contact with the lever cam 72 via a roller 74 is provided rotatably about a rotation fulcrum 76. The clutch cam 75 has a clutch plate 79 having one end pivotally attached to the clutch cam 75 with a pin 77 and the other end connected to the tension arm 66 with a pin 78. The clutch cam 75 and the clutch plate 79 are constantly urged by a spring 80 in the clutch engagement direction.
[0022]
Further, a belt-like brake member 82 is disposed close to the outer peripheral side of the driven pulley 56 so as to cover a substantially semicircular portion of the driven pulley 56. The brake member 82 has one end locked to the lever cam 72 via a spring 84 and the other end locked to the swing arm 44.
[0023]
According to the present embodiment, based on the operation of the walking operation lever 50, the tension clutch 62 is turned on and off via the linkage mechanism 70, and the brake member is almost interlocked with the operation of disengaging the tension clutch 62. 82 operates to apply a braking action to the driven pulley 56.
[0024]
A clutch arm 30 a is connected to the clutch pedal 30, and a proximal end side of the clutch arm 30 a is rotatably mounted on a clutch shaft 31. A plate 30b is integrally fixed to the proximal end of the clutch arm 30a, and a hole (not shown) is formed at the distal end of the plate 30b. A clutch rod 32 is loosely fitted in the hole, a lock nut 33 is provided at one end of the clutch rod 32, and the other end is connected to a clutch cam 75.
[0025]
As described above, when the clutch pedal 30 is depressed, the clutch arm 30a and the plate 30b rotate counterclockwise in FIG. 2 around the clutch shaft 31 and the clutch rod 32 is pulled in the axial direction, so that the clutch cam 75 rotates. The rotation of the tension clutch 62 in the counterclockwise direction in FIG. That is, the clutch pedal 30 has functions of neutral braking and running stop.
[0026]
Next, the operation will be described.
[0027]
When traveling on a road or working in a field, the steering wheel 24, the main transmission lever 71, the clutch pedal 30 and the like are operated to carry out the vehicle traveling. At this time, when the main transmission lever 71 is operated to the clutch disengaged position in FIG. 2, the roller 74 provided on the clutch cam 75 is in contact with the lever cam 72, so that the rotation is also performed by the urging force of the spring 80. It is not possible to rotate in the clockwise direction in the figure around the fulcrum 76. Therefore, the tension arm 66 of the tension clutch 62 rotates clockwise about the swing fulcrum 64 by the urging force of the torsion spring 67, and the tension clutch 62 is disengaged. At this time, the brake member 82 having one end locked to the lever cam 72 is tensioned in the clutch disengaged state shown in the drawing, and the braking action is applied to the driven pulley 56.
[0028]
Next, when the main transmission lever 71 is operated forward from the position shown in FIG. 2, the lever cam 72 rotates counterclockwise in FIG. 2 around the rotation fulcrum 73 and contacts the roller 74 provided on the clutch cam 75. The contact state is released. As a result, the clutch cam 75 is urged clockwise in the drawing around the rotation fulcrum 76 by the urging force of the spring 80, and the end of the long hole 79a at the tip of the clutch plate 79 moves the pin 78 rightward in the drawing. To pull. Therefore, the tension arm 66 rotates counterclockwise in the drawing around the swing fulcrum 64 against the biasing force of the torsion spring 67, and the tension clutch 62 is engaged. At substantially the same time, the brake member 82, one end of which is locked to the main transmission lever 71 (lever cam 72), relaxes with the rotation of the main transmission lever 71, and the braking action on the driven pulley 56 is released.
[0029]
Next, for example, when going over a ridge, in the case of a steep ridge, the body is greatly inclined back and forth, so it is desirable that the operator get off and steer. Therefore, the operator moves the airframe near the ridge, operates the main transmission lever 71 to the rear of the airframe, disengages the tension clutch 62, and stops the airframe.
[0030]
In this state, the operator gets off the vehicle and turns the walking operation lever 50 provided at the front of the machine body forward (C 'side in the figure). Then, the connecting piece 51 on the base end rotates counterclockwise about the turning fulcrum shaft 52, and the pin 46 b at the end of the connecting link 46 pulls one end of the swing arm 44. The pin 48 provided on the other end of the arm 44 pushes the tension arm 66, and the tension arm 66 rotates counterclockwise about the swing fulcrum 64. Thus, the tension pulley 68 tensions the scraping belt 58, the tension clutch 62 is engaged, and the aircraft starts climbing up the slope along the slope at the ridge. At this time, when the walking operation lever 50 is turned forward (the clutch engagement position), the brake member 82 is relaxed, and the braking action on the driven pulley 56 is released.
[0031]
Eventually, when the ridge crossing is over and the operator releases the walking operation lever 50, the walking operation lever 50 is returned to the clutch disengaged position (the position C in the figure) by the urging force of a spring (not shown). At substantially the same time, with the return movement of the swing arm 44, the brake member 82 locked on the swing arm 44 is pulled and tightened, and a braking action is applied to the driven pulley 56.
[0032]
According to the present embodiment, the walking operation lever 50 and the tension clutch 62 arranged at the front of the fuselage are connected by the connecting mechanism 70 and the brake member 82 is connected to the connecting mechanism 70 in an interlocking manner. Since the 50, the tension clutch 62, the brake member 82, and the like can be centrally arranged at the front part of the machine body, the size of the working machine body can be reduced.
[0033]
【The invention's effect】
As described above, according to the first aspect of the present invention, there is provided a linking mechanism for linking the walking operation tool and the tension clutch, and a brake member interlockingly connected to the linking mechanism. Since the tension clutch is linked so as to be turned on and off via a base linking mechanism, and the brake member is operated substantially in conjunction with the turning operation of the tension clutch, the walking operation tool, the tension clutch, and The brake members and the like can be centrally arranged at the front of the machine body, and the working machine body can be reduced in size.
[Brief description of the drawings]
FIG. 1 is a side view of a riding rice transplanter as an agricultural working machine according to the present invention.
FIG. 2 is a sectional side view of a front part of the riding rice transplanter according to the first embodiment;
[Explanation of symbols]
Reference Signs List 10 riding rice transplanter 16 traveling body 20 engine 20a output shaft 22 transmission 22a input shaft 50 walking operation lever (walking operation tool)
52 rotating fulcrum shaft 54 driving pulley 56 driven pulley 58 wrapping belt 60 belt transmission device 62 tension clutch 70 linking mechanism 82 brake member

Claims (1)

An output shaft of an engine disposed at the front of the fuselage is connected to an input shaft of a transmission disposed at the front of the fuselage, and a drive pulley provided on the output shaft and an input shaft are provided on the input shaft. In an agricultural work machine having a belt transmission having a wrapping belt wound between driven pulleys,
A tension clutch that is in rolling contact with the winding belt and tensions and relaxes the winding belt;
A walking operation tool provided at the front of the aircraft and operated by getting off the vehicle,
A linking mechanism linking the walking operation tool and the tension clutch;
A brake member interlockingly connected to the linking mechanism and disposed close to the driven pulley,
Based on the operation of the walking operation tool, the tension clutch is turned on and off via the linking mechanism, and the brake member is operated substantially in conjunction with the disengagement operation of the tension clutch to brake the driven pulley. Action is given,
A farm working machine characterized by the above-mentioned.

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