JPH0110501Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention has two disc clutches in a clutch housing that is also used for the vehicle body frame. They are supported on the same axis so that they are in the same direction, and one of the operating members is provided with a structure in which, as the one operating member moves in the cutting operation direction, the other operating member is moved in the direction of the cutting operation. An adjusting bolt having a head that is moved in the cutting operation direction by contacting and pressing is arranged so that a gap is formed between the head and the other operating member when both disc clutches are in the engaged state. The disc clutch is screwed onto the disc and fixed with a lock nut, and the one operating member is moved by operating one operating tool, thereby operating the two disc clutches in and out at different timings. This article relates to the clutch structure of a tractor.

In the above clutch structure, conventionally, as shown in FIG. 4, an adjusting bolt 20 with a lock nut 24 threaded thereon is screwed onto the first operating member 18a with its head close to the second operating member 18b. Adjust the timing to engage and close both clutches.
This was done by loosening the lock nut 24 and changing the screwing amount of the adjusting bolt 20 into the operating member, but in the clutch housing 11 which is also used as a vehicle body frame, the operating opening 25 for the bolt 20 and the lock nut 24 is The bolt 20 and the lock nut 24 cannot be made very large due to strength or space considerations, and this poses a problem in that it is difficult to adjust the bolt 20 and lock nut 24.

This invention was made in view of the above circumstances.
To easily adjust the timing of both clutches without reducing the strength of a clutch housing even with simple modification.

Next, embodiments of the present invention will be described based on the drawings.

As shown in FIG. 1, an engine 3 is provided at the front of a vehicle body frame 2 equipped with a tire-type traveling device 1.
A lift arm 4 and a power take-off shaft 5 for transmission are provided at the rear of the vehicle to link various working devices such as a rotary tiller so that they can be raised and lowered, and a control section 26 is provided on the upper part of the body frame 2 to form an agricultural tractor. It has been done.

As shown in FIG. 2, the vehicle body frame 2 includes a transmission case 8 that houses a transmission device 6 for traveling for the traveling device 1, a transmission mechanism 7 for the power take-off shaft 5, etc., a disc clutch 9 for traveling, and a transmission case 8 for traveling. It consists of a clutch housing 11 in which a disc clutch 10 for power extraction is housed.

The traveling clutch 9 includes a flywheel 12 operatively connected to the output shaft of the engine 3.
The input shaft 13 of the traveling transmission 6 is rotatably mounted on the input shaft 13, and a friction plate 1 is mounted on the input shaft 13.
The friction plate 17 is fitted to the first clutch cover 12a, which is rotatably attached to the flywheel 12, by spline-fitting the sliding member 19a attached thereto so as to be slidable in the direction of the axis P of the input shaft 13. is pressed against the flywheel 12 and urged by the disc spring 15 to transmit power to the input shaft 13
The operating member 18a is provided so as to be slidable only in the axis P direction.

In configuring the power take-off shaft clutch 10,
A sliding member 19b in which a cylindrical shaft 16, which is interlocked and connected to a transmission shaft 14 for the power take-off shaft 5 by a transmission mechanism 7, is rotatably fitted onto the input shaft 13, and a friction plate 17 is attached to this cylindrical shaft 16. The friction plate 17 is pressed against the first clutch cover 12a, and the friction plate 17 is pressed against the first clutch cover 12a to form a cylinder. The second operating member 18b is provided so as to be slidable only in the axis P direction while being biased by the disc spring 15 to transmit power to the shaft 16.

One end of the operating arm 27 pivotally mounted on the second clutch cover 12b is connected to the first operating member 18a by a link 28, and the other end is connected to the axis by pressing the foot pedal 23. The first operating member 18a is disposed close to the pressing member 21 fitted onto the cylindrical shaft 16 so as to be slidable in the P direction, and the operating arm 27 is swung by the initial operation of the pedal 23, so that the first operating member 18a is moved by a disc spring. The first operating member 18 is configured to be separated from the friction plate 17 against the restoring force of the pedal 15 to cut off power to the input shaft 5, and even when the pedal 23 is operated at the final stage, the first operating member 18
The second operating member 18b is separated from the friction plate 17 by the pressing action of the head of the bolt 20 screwed into the second operating member 18b,
It constitutes a so-called two-stage clutch that cuts off the power to the power take-off shaft 5.

As shown in FIG. 3, the first operating member 18a
The head of the bolt 20, which is screwed through, is brought close to the second operating member 18b, and on the tip side of the bolt 20,
A bolt rotation operation part 20a is formed, and a lock nut 24 is screwed into the bolt rotation operation part 20a, and the lock nut 2 is inserted through an opening 25 formed in the upper part of the clutch housing 11.
4 and the bolt rotation operation part 20a to change the gap l between the bolt head and the second operation member 18b, the operation can be changed from the disengagement operation of the traveling clutch 9 to the disengagement operation of the PTO clutch 10. The configuration is such that the timing can be adjusted.

In addition, in the present invention, the foot pedal 23 may be replaced with an operating tool such as a manual lever, and both clutches are limited to the above-mentioned traveling clutch 9, power take-off shaft clutch 10, etc. isn't it.

In summary, the present invention provides the aforementioned tractor clutch structure with a bolt rotation operating portion 20a provided at the end of the adjustment bolt 20 on the side where the adjustment bolt 20 is screwed into the one operation member 18a. It is characterized in that it is screwed through the operating member 18a, and the lock nut 24 is screwed onto the end protruding from the operating member 18a.

That is, the timing of engagement and disengagement of both clutches 9 and 10 can be adjusted by a simple modification such as providing the bolt rotation operating portion 20a and the lock nut 24 on the protruding end side of the bolt 20 that is screwed through one of the operating members 18a. , the operating member 18 of the adjustment bolt 20
This can be done even in a small area such as the protruding part from a, and therefore the bolt adjustment opening provided in the clutch housing 11 can be made as small as possible, so the strength of the clutch housing 11 is not reduced and the overall As a result, it has become superior in terms of both operation and strength.

Incidentally, although reference numerals are written in the claims section of the utility model registration for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of drawings]

The drawings show an embodiment of the clutch structure of a tractor according to the present invention, and FIG. 1 is an overall side view of the tractor;
FIG. 2 is a sectional view showing a clutch structure, FIG. 3 is a sectional view of a main part, and FIG. 4 is a sectional view of a main part of a conventional structure. 2... Vehicle body frame, 9, 10... Disc clutch, P... Shaft center, l... Gap, 11... Clutch housing, 18a, 18b... Operation member, 20
...adjustment bolt, 20a...bolt rotation operation section,
23... Operating tool, 24... Lock nut.

Claims (1)

[Scope of utility model registration request] Two disk clutches 9, 10 are provided in a clutch housing 11 which is also used for the vehicle body frame 2, and the movement direction of operation members 18a, 18b for turning on and off is provided for each of both disk clutches 9, 10. They are supported on the same axis P so that they are in the same direction, and one of the operating members 18a and 18b is provided with a support member 18a that is supported on the same axis P so as to be in the same direction. , an adjustment bolt 20 having a head that abuts and presses the other operating member 18a to move it in the cutting operation direction.
is screwed on and fixed with a lock nut 24 so that a gap l is formed between the head and the other operating member 18b when both disc clutches 9 and 10 are in the engaged state. By operating the operating tool 23, the one operating member 18a is moved, and the second operating member 18a is moved.
In a tractor clutch structure in which the disc clutches 9 and 10 are configured to be engaged and closed at different timings, the adjusting bolt 20 is screwed into the one operating member 18a at the end thereof. A bolt rotation operation section 20a is provided, the adjustment bolt 20 is screwed through one of the operation members 18a, and the lock nut 24 is screwed onto the end protruding from the operation member 18a. Tractor clutch structure.