JP2001063641A - Farm working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely operate on/off of a clutch mechanism by one hand without being obstructed by the other hand grasping a handle grip part by forming a non-piling part not piling on each other at least on either of the operating part of a clutch lever and the grip part of a handle. SOLUTION: A handle 7 is formed into a nearly U-shape out of right and left a pair of handle root parts 71 combinedly supported with a front base part side transmission case 5 and a loop-like grip part 72 continuously connected to the rear free end side of the respective handle root parts 71. Nearby the grip part 72 of the handle root parts 71, a clutch lever 8 for operating a clutch mechanism 4 to be on/off is supported capably of swinging in the longitudinal direction. The clutch lever 8 is provided with operation parts 82 connected to the free ends of right and left supporting parts 81 and extending in parallel with the grip part 72 of the handle 7. At least on one side of the grip part 72 of the handle 7 and the operation part 82 of the clutch lever 8, a non-piling part 10 not piling on each other is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a walk-type agricultural machine mainly for tilling work and various management works.

[0002]

2. Description of the Related Art Conventionally, this kind of agricultural working machine has a transmission case mounted on a body on which an engine is mounted, and a pair of running wheels is supported on both lower sides of the transmission case via left and right axles. A clutch mechanism is interposed between the engine and the engine, and power from the engine is transmitted to each axle via the clutch mechanism. The body is provided with a handle. The handle is substantially U-shaped with left and right handle bases extending from the fuselage side and loop-shaped grips continuously connected to the free ends of the handle bases. A clutch lever for turning on and off the clutch mechanism is swingably supported near the grip portion.

As the clutch lever, a so-called deadman-type clutch lever having excellent operability in which a rocking operation can be performed at any position is used. A loop-shaped member having an operating portion continuously connected to the free end side of each of these support portions and extending in parallel along the grip portion of the handle is used. An on / off operation of the clutch mechanism is performed by gripping a grip portion of an operating portion provided on the clutch lever and swinging the operating portion toward and away from the grip portion of the handle.

[0004]

However, according to the above construction, both the handle and the clutch lever are formed into a continuous loop, and the operating portion of the clutch lever is provided in parallel with the grip of the handle. Therefore, the following inconvenience occurs. In other words, at the time of work or traveling, the operator grasps the grip of the handle with one hand and steers the fuselage while holding the grip of the operating unit provided on the clutch lever with the other hand. The on / off operation of the clutch mechanism is performed by swinging the clutch lever toward and away from the grip portion of the handle. At this time, even if the operator grasps any part of the grip portion, Even when the clutch lever is swung by gripping any part of the grip portion, when the clutch lever is swung toward the grip portion side, the grip portion and the grip portion of these clutch levers overlap or overlap with each other. However, the hand for grasping the grip portion is in the way, and it is impossible to perform a reliable swing operation of the clutch lever toward the grip portion. At this time, once the hand is released from the grip portion of the handle, the clutch lever can be rocked to the grip portion side, but in such a case, the steering of the aircraft becomes unstable. .

SUMMARY OF THE INVENTION It is an object of the present invention to securely engage and disengage a clutch mechanism by swinging a clutch lever toward the grip portion with the other hand without being disturbed by one hand grasping the grip portion of the handle. An object of the present invention is to provide an agricultural work machine that can perform the operation.

[0006]

In order to achieve the above object, the invention according to claim 1 comprises an axle 61 for transmitting power from an engine 3 via a clutch mechanism 4;
, A handle 7 having left and right handle bases 71 extending from the body 1 and a grip 72 connecting the free ends of the handle bases 71, and the clutch mechanism 4 held by the handle 7. And a clutch lever 8 for turning the clutch on and off.
2, the operating unit 82 includes an operating part 82 that can approach and separate from the grip part 72, and the operating part 82 is formed with a grip part 83 that overlaps with the grip part 72. At least one of the operating portion 82 of the clutch lever 8 and the grip portion 72 of the handle 7 has a non-overlapping portion 10 that does not overlap with each other.

[0007]

During operation or traveling, the operator grasps the grip 72 of the handle 7 with one hand and operates the clutch lever 8 with the other hand on the clutch lever 8 with the other hand.
By gripping the grip portion 83, the clutch lever 8 is swung in the direction toward and away from the grip portion 72 of the handle 7 to perform the on / off operation of the clutch mechanism 4. At this time, the non-overlapping portions 10 that do not overlap each other are formed on at least one of the grip portion 72 of the handle 7 and the operating portion 82 of the clutch lever 8. And handle 7
The grip portion 72 does not overlap with each other, that is, does not overlap with each other, and the hand that grasps the grip portion 72 can be obtained by positioning the one hand on the grip portion 72 and swinging the clutch lever 8 in the non-overlapping portion 10. Without getting in the way
The swing operation of the clutch lever 8 toward the grip portion 72 can be reliably performed.

[0008]

1 and 2 show a walking-type management device as a preferred embodiment of the present invention. The management device includes a rotary tilling device 2, An engine 3 as a driving source, a transmission case 5 to which rotational power from the engine 3 is transmitted via a main clutch mechanism 4 described later, and both lower portions of the transmission case 5 are supported via left and right axles 61, 61. A pair of traveling wheels 6, 6 are sequentially arranged. In addition, a handle 7 is extended behind the body 1. And handle 7
By disposing a pair of running wheels 6 via the left and right axle 61 between the operator who grasps
It is designed to ensure operator safety.

The rotary tilling apparatus 2 includes a tilling shaft 20
And a tillage claw 21 composed of four thorn claws, a substantially semicircular rotary cover 22 that covers the outer periphery thereof, and a residual tillage treatment device 23 that enters the soil.

A pair of input / output pulleys 31 and 32 housed in a transmission case 30 from the engine 3, a belt 33 stretched between the pulleys 31 and 32, and a belt 33 disposed opposite to the belt 33. The transmission is transmitted to the input shaft E of the transmission case 5 via the main clutch mechanism 4 having the tension roller 40 and the input shaft E to the respective axles 61 of the left and right traveling wheels 6 via the internal mechanism of the transmission case 5. Rotational power is transmitted to rotate these traveling wheels 6. In the figure, 35 is an engine cover, and 36 is a muffler.

In the embodiment shown in FIG. 1, the transmission case 5 is provided with a rotary case 5A for branching and outputting power to a tilling shaft 20 of the tilling device 2, and the rotary case 5A Each axle 61 and tilling shaft 20
And are arranged substantially horizontally along the line connecting. Also,
At the forefront position of the fuselage 1, a pair of left and right caster-elevating wheels 11 capable of vertically adjusting the support height of the fuselage 1 according to the tillage depth and traveling on the road can be swung via a swing arm 12. I support it.

As is apparent from FIG. 5, the clutch mechanism 4 has a tension roller 40 at its tip end on a rotating shaft 4.
A swing arm 43 rotatably supported via the first arm 1 and a base side pivotally supported by the transmission case 5 via a pivot pin 42 on the transmission case 5. A first spring 44 composed of a torque spring wound around the outer periphery of the support pin 42; an operation wire 45 having one end in the length direction connected to the swing arm 43 and the other end connected to a clutch lever 8 described later; It has. The first spring 44
Has a leg on one side of the swing arm 43,
The leg on the other side is locked to a handle mounting boss 50a, which will be described later, provided on the transmission case 5, and the first spring 44 urges the swing arm 43 to always swing forward. Accordingly, the tension roller 40 is moved in the direction in which the belt 33 is relaxed, and the clutch 33 is maintained in the disengaged state. The operation wire 4
A second spring 46 having a conical shape is attached to the distal end of the fifth spring 5, and an operation wire 45 is connected to the swing arm 43 via the second spring 46.
The clutch lever 8 is returned from the engaged state to the disengaged state by the clutch levers 4 and 46.

The handle 7 has a pair of left and right handle bases 7 whose front bases are connected and supported by the transmission case 5.
1, 71, and a loop-shaped grip portion 72 continuously connected to the rear free end side of each handle base portion 71 are formed in a substantially U shape. In the embodiment shown in each figure, a cylinder 70a is provided on the front end side of each handle base 71 as shown in FIG. 5, and this cylinder 70a is inserted and connected to a handle mounting boss 50a provided on the transmission case 5. At the same time, one positioning hole is provided at a longitudinally intermediate portion of each handle base 71, and a pin 70b inserted into the positioning hole is provided on the transmission case 5 side in an arc centered on the boss 50a. A plurality of positioning holes are engaged with any one of the plurality of pins 70b so that the handle bases 71 and 72 are supported by the boss 50a as a fulcrum so that the angle can be changed. I have.

Further, a clutch lever 8 for engaging and disengaging the clutch mechanism 4 is supported near the grip portion 72 of the handle base 71 so as to be swingable in the front-rear direction. Reference numeral 8 denotes left and right support portions 81 that are swingably supported by the handle base portions 71 via pivot pins 70, and are connected to the free ends of the support portions 81 so that the handle 7 can be gripped. An operating portion 82 extending in parallel with the portion 72 is provided, and the operating portion 82 is formed with a grip portion 83 which is gripped by an operator when the clutch is operated.

When the clutch lever 8 is positioned substantially upright with respect to the grip 72 of the handle 7 as shown by the solid line in FIGS. 1 and 2, the swing arm 43 of the clutch mechanism 4 is moved to the second position. 5, the tension roller 40 held by the swing arm 43 is moved in the direction in which the belt 33 is relaxed as shown by the solid line in FIG. None,
When the clutch lever 8 is located on the rear side so as to overlap with the grip portion 72 of the handlebar 7 as shown by the phantom line in FIGS. By moving the moving arm 43 backward while resisting the urging force of the first spring 44, the tension roller 40 is pressed against the belt 33 and tightened as shown by the imaginary line in FIG. The clutch is kept in the engaged state.

In the above configuration, non-overlapping portions 10 which do not overlap each other are formed on at least one of the grip portion 72 of the handle 7 and the operation portion 82 of the clutch lever 8. That is, in the embodiment shown in FIGS. 1 and 2, a notch is formed at a longitudinally intermediate portion of the operating portion 82 of the clutch lever 8 and the notch is provided to provide the operating portion 82.
A non-overlapping portion 10 that does not overlap with the grip portion 72 of the handle 7 is formed therebetween. More specifically, the clutch lever 8 is formed by a pair of left and right independent first and second lever bodies 8A each having a substantially L shape having a support portion 81 and an operation portion 82.
8B and one connecting rod 8C installed between the support portions 81 of the lever bodies 8A and 8B, and the support portions 81 of the lever bodies 8A and 8B are The non-overlapping portion 10 is formed between the operating portions 82 of the lever bodies 8A and 8B by being supported by the handle base 71.

When, for example, tilling work is performed by the above-mentioned management machine, the operator grasps the non-overlapping portion 10 of the grip portion 72 of the handle 7 with one hand and the first and second hands with the other hand. By gripping one of the gripping parts 83 provided on the operating part 82 of the lever bodies 8A, 8B and swinging backward, the other sides of the lever bodies 8A, 8B are simultaneously connected via the connecting rod 8C. By swinging, the clutch mechanism 4 can be operated to the above-described clutch engaged state via the operation wire 45 connected to one side of the lever bodies 8A and 8B.

Further, from this state, that is, the state in which the first and second lever bodies 8A and 8B are swinging rearward,
When the hand holding the grip portion 83 is released, the first and second lever bodies 8A and 8B are released from the first and second springs 44 and 46.
And the clutch mechanism 4 returns from the clutch engaged state to the clutch disengaged state.

At this time, a non-overlapping section 10 is formed between the operating sections 82 of the lever bodies 8A and 8B so that the operating section 82 does not overlap with the grip 72 of the handle 7. By grasping the gripping portion 72 facing and gripping one of the levers 8A and 8B, the gripping portion 83 of the levers 8A and 8B and the gripping portion 72 of the handle 7 are mutually moved. Each of the lever bodies 8A, 8B is not overlapped, that is, does not overlap, and thus the hand for grasping the grip 72 is not in the way.
Can be reliably swung from the clutch disengaged state, which is held substantially upright with respect to the grip portion 72, to the clutch engaged state, in which the grip portions 72 fall down on the rear side in an overlapping manner.

In the embodiment shown in FIG. 3, the clutch lever 8 is connected to the left and right support portions 81 and the respective support portions 81.
The handle 72 of the handle 7 is connected to the free end of the handle 7.
And an operating portion 82 extending in parallel with the handle 7, and a central portion in the length direction of the grip portion 72 provided on the handle 7 is bent rearward in a U-shape in a plan view to form a curved portion. The non-overlapping portion 10 is formed between 72 a and the operating portion 82 of the clutch lever 8.

Further, in the embodiment shown in FIG. 4, the central portion in the longitudinal direction of the grip portion 83 of the operation portion 82 is extended in a U-shape in plan view from the grip portion 72 of the handle 7 toward the front side. The non-overlapping portion 10 is formed between the grip portion 72 and the front extension portion of the grip portion 83.

In each of the above embodiments, the non-polymerized portion 1
By grasping the grip portion 72 of the handle 7 opposing to the clutch lever 0 and performing a swing operation while gripping the grip portion 83 of the operating portion 82 provided on the clutch lever 8, the hand grasping the grip portion 72 is disturbed. The clutch lever 8 can be reliably swung from the clutch disengaged state to the clutch engaged state without becoming slack.

The transmission case 5 supports a transmission lever 9 for switching a transmission mechanism provided inside the transmission case 5. The transmission lever 9 is provided with a transmission mechanism, as is apparent from FIG. An operating rod 91 to be operated;
A guide rod 92 bent into a crank shape to be inserted into a guide plate to be described later, a disc-shaped connecting plate 93 for integrally connecting these rods 91, 92, and the guide rod 9
Operating rod 9 having an operating portion 94 coupled to the free end of the second
5. And the mission case 5
When the transmission lever 9 is to be supported, as shown in FIGS. 1 and 2, the operation rod 95 is inclinedly extended rearward and upward through the guide rod 92.
In such a case, since the operating portion 94 of the operating rod 95 is located near the grip portion 72 of the handle 7, an operator who grips the grip portion 72 and steers the aircraft 1 can easily perform a shift operation. The operability can be improved.

As shown in FIGS. 1 and 2, a guide plate 96 into which a guide rod 92 of the transmission lever 9 is inserted is inclined obliquely downward toward the rear, as shown in FIGS. The guide plate 96
As shown in FIG. 7, the upper and lower two-step first and second guide grooves 9
7, 98, and a communication groove 99 for communicating these guide grooves 97, 98. The second guide groove 98 has a neutral position,
A second forward speed position and a reverse position are provided, and the first guide groove 97 is provided with a first forward position and a working position for rotating the rotary. Further, a portion 97a of the first guide groove 97 at the working position is inclined obliquely downward.
In this case, the shift lever 9 can be smoothly guided to the working position portion 97a of the first guide groove 97, although the guide rod 92 at the intermediate portion of the shift lever 9 is bent upward in a crank shape. However, when the shift lever 9 is located at the work position portion 97a, it is possible to prevent the shift lever 9 from moving without permission.

The rotary cover 2 of the tillage device 2
2 is a semicircular cover body 22a and the cover body 22a.
It is preferable to divide into a pair of side covers 22b disposed on both left and right sides of the main body a, and to detachably attach the side covers 22b to the cover main body 22a. That is, as shown in FIGS. 8 and 9, the entire cover body 22a is formed into a semicircular shape that curves upward in the front-rear direction, and a plurality of reinforcing ribs 22c extending in the front-rear direction are integrally formed on the upper surface thereof. And at the left and right ends of the cover body 22a,
A mounting piece 22e having a plurality of through holes 22d is provided integrally. As shown in FIG. 10, the side cover 22b is formed of a semicircular disk having a plurality of through holes 22f facing the through holes 22d of the cover main body 22a.
The side cover 22b is detachably attached to the cover main body 22a by inserting fixing bolts between the through holes 22d and 22f and fixing the nuts with nuts.

In the above configuration, when the tilling claw 21 provided inside the rotary cover 22 is replaced with, for example, a spiral rotor or the like, it has not been possible in the prior art.
By removing b, another attachment such as a spiral rotor can be easily attached, and the inside of the rotary cover 22 can be easily cleaned and maintained. Further, even in the case where an attachment longer than the rotary cover 22 is changed, the side cover 22b is removed from the cover main body 22a, and a semicircular supplementary main body part continuous with both right and left ends of the cover main body 22a is provided. By attaching another long side cover 22b having a side portion extending downward from one end of the supplementary body, the long attachment can be easily attached, and the operator can use the long side cover 22b with the long side cover 22b. Can be prevented from being hit by soil or stones. In FIG. 8, a plurality of mounting holes 22g are formed in the cover body 22a,
Another cover can be attached to this attachment hole 22g.

Further, inside the rotary cover 22, a pair of left and right rotary frames 13 extending in parallel from the transmission case 5 toward the front side and constituting a part of the body 1 is disposed. As shown in FIGS. 11 and 12, each of the rotary frames 13 is made of a plate-like member facing left and right, and has an upper end for attaching the rotary cover 22 and another component attached to the cover 22. A plurality of mounting pieces 14 are integrally formed, and an engine receiving plate 16 on which a plurality of fixing bolts 15 for mounting the engine 3 are provided is fixed to an upper rear side of each rotary frame 13. In addition, the rotary frames 13 are integrally formed with bending step portions 17 which are bent to the left and right outward so that the mounting side to the transmission case 5 is wide at the rear side. As described above, by providing the bending step 17 on each rotary frame 13, the strength of each rotary frame 13 can be increased, while the vibration resistance can be improved and the stability when the engine 3 is mounted can be improved. Can be enhanced. In FIG. 12,
Reference numeral 18 denotes a mounting hole for mounting the rotary frame 13 to the transmission case 5.

[Brief description of the drawings]

FIG. 1 is a side view of a management machine shown as an example of a farm work machine according to the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a plan view schematically showing another embodiment.

FIG. 4 is a plan view schematically showing another embodiment.

FIG. 5 is a side view showing a clutch mechanism.

FIG. 6 is a partially omitted side view showing a clutch shift lever.

FIG. 7 is a front view of a guide plate for guiding the transmission lever.

FIG. 8 is a plan view showing a cover main body of the rotary cover.

FIG. 9 is a side view of FIG.

FIG. 10 is a side view showing a side cover of the rotary cover.

FIG. 11 is a partially omitted plan view of a rotary frame constituting the airframe.

FIG. 12 is a side view of FIG.

[Explanation of symbols]

 Reference Signs List 1 body 3 engine 4 clutch mechanism 61 axle 7 handle 71 handle base 72 grip 8 clutch lever 82 operating part 83 gripping part 10 non-overlapping part

Claims (1)

[Claims] An axle (61) for transmitting power from an engine (3) via a clutch mechanism (4), and an axle (6).
A handle (7) having a body (1) supporting the first body, a left and right handle base (71) extending from the body (1), and a grip (72) connecting the free ends of these handle bases (71). ), And a clutch lever (8) held by the handle (7) to turn on and off the clutch mechanism (4). The clutch lever (8) extends along the grip portion (72), Agricultural work having an operating portion (82) that can approach and separate from the grip portion (72), and the operating portion (82) is formed with a grip portion (83) that overlaps with the grip portion (72). In the machine, at least one of the operating portion (82) of the clutch lever (8) and the grip portion (72) of the handle (7) is formed with a non-overlapping portion (10) that does not overlap with each other. Agricultural work machine.