JPH0249149Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a structure of a lever operating portion of an agricultural tractor.

[Conventional technology]

Conventionally, the structure of the above-mentioned operating section was
As shown in Japanese Patent No. 122548, there is a fender configured such that the operating lever can be operated within the left and right width of the fender, and a guide plate for the lever is attached to the fender.

[Problems to be solved by the invention] Generally, small agricultural tractors have small body widths, so a driver's seat is provided between the left and right fenders of the rear wheels, and the control lever is operated from the side of this seat. In this case, the operator and the operating lever are too close together, making it difficult to handle the operating lever. Therefore, if the conventional configuration described above is adopted, the distance between the operator and the operating lever can be increased, and the operating lever becomes easier to handle. However, in this conventional configuration, a gap is formed between the driver's seat and the guide plate, so during work, the worker's clothes may come into contact with the link mechanism, etc. linked to the operating lever through the gap. However, there is room for improvement as there is a possibility that the link mechanism may be contaminated with oil, and that dirt, dust, etc. may enter through the gap and bite into the link mechanism etc., increasing the operating resistance.

An object of the present invention is to construct a lever operation part structure that eliminates the above-mentioned disadvantages through reasonable modification.

[Means for solving problems]

The feature of this invention is that a cover is disposed on the upper part of the transmission case which pivotally supports the rear wheel, and the left and right ends of this cover are bent upward to approach the rear wheel fender, and the cover is inserted into the central recessed part of the cover. The driver's seat is installed, the rear wheel fender facing the upper bent part of the cover is recessed, a lever insertion space is formed between this fender recessed part and the upper bent part of the cover, and the lever is extended from the transmission case. The operating levers are made to protrude above the cover through the insertion space, and their functions and effects are as follows.

[Effect]

As mentioned above, since the left and right ends of the cover are brought closer to the rear wheel fenders, the gaps that were conventionally formed on the left and right sides of the driver's seat can be eliminated without using special members, and the fender recesses can be Since the operating lever is inserted, the distance between the operator and the operating lever can be increased, similar to the conventional structure described above.

[Effect of idea]

Therefore, by rationally modifying the cover provided below the driver's seat and the fender, the operating lever can be made easier to handle, and the operating resistance of the operating lever due to dirt entering the interlocking structure can be increased.
It was possible to construct a lever operation structure that can prevent clothes from getting dirty due to contact with the link mechanism of the operation lever.

Furthermore, since the driver's seat is installed in the central recess of the cover, the outer periphery of the driver's seat is smooth and feels good to the touch, resulting in improved comfort.

〔Example〕

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

As shown in FIG. 3, an engine 2 and a main clutch housing 3 are mounted in a connected state on the front part of a pair of left and right frames 1, a transmission case 4 is connected to the rear part of the frame 1, and the main clutch housing 3 and a transmission case 4 are connected to enable power transmission through a transmission shaft 5, and further a drive shaft 6 protruding left and right from the rear of the transmission case 4 is connected to a rear wheel 7, and Mission case 4
The transmission shaft 8 disposed forward from the front of the vehicle and the differential device 9a of the front wheels 9 are connected to form a traveling drive system. A riding and driving section A consisting of a steering handle 10 and a driver's seat 11 is provided in the center of the vehicle body to constitute an agricultural tractor.

As shown in FIGS. 1 and 3, at the rear of the transmission case 4, there is a pair of left and right lift arms 13 that are driven up and down by hydraulic cylinders 12, and a ground plane that is attached to the rear end of the vehicle body via the lift arms 13. A PTO shaft 14 is provided to transmit power to a working device (not shown), and a cover 16 is provided to cover the top of the mission case 4 via a frame 15 attached to the top surface of the case 4. , furthermore, the cover 1
The driver's seat 11 is installed above the vehicle 6.

To be more specific, as shown in FIGS. 1 and 2,
The cover 16 has both left and right ends bent upward to approach the left and right rear wheel fenders 17, 17, and has a recessed part 16a formed in the center, and the driver's seat 11 is installed in this recessed part 16a. be.

Further, recessed portions 17a, 17a are formed in the fender portions facing the upper bent portions 16b, 16b,
The recessed portions 17a, 17a and the upper bent portion 16b,
Lever insertion spaces S, S are formed between the lever and the lever 16b.

The main shift lever 18 is located in the lever insertion space S on the left side, the position control lever 19 for setting the height of the ground work device in the lever insertion space S on the right side, and a rotary tiller (not shown) as the ground work device. An automatic plowing depth setting lever 20 for setting the ground working depth (1) is inserted into each of the plows.

The three levers 18, 19, and 20 are each pivotally supported on one shaft 21, and are linked so that each lever can be operated by swinging around this shaft.

Further, guide plates 22, 22 are installed over the upper bent portions 16b, 16b and the left and right fenders 17, 17, and a front cover 24 is installed over the front end of the cover 16 and the step 23 of the driving section A. be.

[Another example]

In addition to the above-described embodiments, the present invention can also be implemented without attaching a guide plate, for example by forming a guide groove for the lever at the outer end of the upper bending part.

[Brief explanation of the drawing]

The drawings show an embodiment of the structure of the lever operating part of an agricultural tractor according to the present invention, in which FIG. 1 is a longitudinal sectional front view showing the lever insertion space, etc., FIG. 2 is an exploded perspective view showing left and right rear wheel fenders and covers, and FIG. Figure 3 is an overall side view of the agricultural tractor. 4...Mission case, 7...Rear wheel, 11
...Driver's seat, 16...Cover, 16b...Upper bent portion of cover, 17...Rear wheel fender, S...
...Lever insertion space.

Claims (1)

[Scope of utility model registration request] A cover 16 is disposed on the upper part of the transmission case 4 which pivotally supports the rear wheels 7, 7, and the left and right ends of the cover 16 are bent upward to approach the rear wheel fender 17, and the center concave portion of the cover 16 is bent upward to approach the rear wheel fender 17. The driver's seat 11 is installed in the entry area, and the upper bent part 16 of the cover 16 is
The rear wheel fender portion facing b is recessed, and a lever insertion space S is formed between this fender recess and the cover upper bent portion 16b, and the operating levers extending from the transmission case 4 are inserted into the insertion space. S
A lever operating part structure for an agricultural tractor that protrudes above the cover through the cover.