JPS598939Y2 - Agricultural tractor fender - Google Patents

Description

[Detailed Description of the Invention] The present invention has a fender of an agricultural tractor having a new structure, and supports a control lever on the fender.

In conventional agricultural tractors, the transmission was of a gear sliding type, and it was necessary to apply a considerable amount of operating force to the transmission lever in order to cause the gear to slide.

Therefore, the gear shift lever was installed at the top of the transmission case, and the long gear lever acted as a lever to slide the gears.

While gear sliding type transmissions were used in this way, the gear shift lever was set above the transmission case.

Recently, agricultural tractors that use a hydraulic clutch type transmission as the main transmission have become popular, and the operating force for the gear shift lever has become smaller, and the shift lever position is no longer limited to the top of the transmission case due to the remote control system using Bowden wire. It is.

The present invention is an agricultural tractor equipped with such a hydraulic clutch type transmission, in which the main gear shift lever is provided on the side of the fender so that it can be easily operated by the operator.

Additionally, if the gear shift lever is placed protruding from the top of the transmission case, there is a problem in that when the operator tries to get on the vehicle, the shift lever gets in the way of passing his feet, and he has to lift it up a lot and sit in an unstable position. However,
This point is also attempted to be solved by the present invention.

The purpose of the present invention is as described above, and the structure of the present invention will be explained based on the structure of the embodiment shown in the attached drawings. Figure 1 is a side view of the rear of an agricultural tractor.

Inside the mission case 1, a main transmission consisting of a hydraulic clutch type transmission and a sub-transmission consisting of a gear sliding type transmission are provided, and a clutch housing is fixed to the front of the mission case. The input rotation is connected and disconnected at 16 and transmitted to the inside of the rear axle case 2 after being changed in speed.

A differential device and a PTO transmission device are provided inside the rear axle case 2, and axles 4, 4 protruding from the differential device.
is supported by the rear axle housing 3 and protrudes to the left and right.

A rear wheel 5 is supported at the tip of the axle 4.

A hydraulic case 6 is installed on the upper surface of the rear axle case 2, and a lift arm 12 protruding from the hydraulic case moves the three-point link type work machine mounting device up and down.

A lift link 13 is pivotally supported at the tip of the lift arm 12, and the lift link is pivotally supported in the middle of the lower link 14.

A working machine is pivotally supported at the tips of the lower link 14 and the top link 15.

A seat 7 is provided above the hydraulic case 6, and a fender 8
connects its base 8a to the mounting part 3 of the rear axle housing 3.
a, and are erected on the left and right sides of the seat 7.

On the upper surface of the mission case 1 are the sub-shift lever 10 and P.
A TO shift lever 11 is provided.

Figure 2 is a plan view of the area around the seat. FIG. 3 is a side view of the area around the fender.

There are steps 18a and 18 on both sides of the mission case 1.
b is fixed horizontally, and the tip of the fender 8 is fixed to a part of the step 18.

Furthermore, at the tip of the step there is an auxiliary step 18 for riding.
C is provided to protrude forward from the step 18, and windshields 17a and 17b are erected at the tips of the auxiliary steps to prevent hot air from the engine.

At the top of the mission case 1 are the sub-shift lever 10 and the P
A sub-shift guide 19 provided with shift guide grooves 19b and 19a for the TO shift lever 11 is fixed, and the sub-shift lever 10 and the PTO shift lever 11 slide within the shift guide grooves.

A recess 8C is provided in the left and right fenders 8a, 8b at a location that matches the front end position of the seat 7, and a main shift lever guide 21 is fitted into the recess 8C.

20 is an assist bar. Since the main transmission is a hydraulic clutch type transmission, the main transmission lever is 9.
The main shift lever 9 is linked to the hydraulic directional control valve of the hydraulic clutch type transmission by a Bowden wire 22.The main shift lever 9 is linked to the hydraulic directional control valve of the hydraulic clutch type transmission by a Bowden wire 22.

The main gear shift lever is provided at a portion where the driver's hand is located while sitting on the seat, and is located at the tip of the assist bar inside the assist par 20.

FIG. 4 is a side view of the fender viewed from the outside. FIG. 5 is a front view of the fender. FIG. 6 is a plan view of the fender.

As seen in the plan view of Figure 2, the left and right fenders are symmetrically constructed, and the main gear shift lever 9, which is generally provided on the right side, can be moved to the left side for left-handed operators. be.

Further, other control levers such as a hydraulic control lever for raising and lowering the working machine can also be arranged on the four parts 8C of the left fender 8b.

Two reinforcing plates, a reinforcing plate constituting a fender base 8d and an auxiliary reinforcing plate 8e, are spot-welded to the outer surface of the fender 8 in a shape that spreads out like the bones of a fan of a fan-shaped fender.

That is, the two reinforcing plates are fixed at an angle such that they are close to each other near the fender base 8d and are separated from each other at the outer periphery of the fender.

A fender recess 8C is formed in the triangular area surrounded by the two reinforcing plates, protruding from the inside to the outside, and the main shift lever guide 21 is fitted into the recess 8C. is pivotally supported on the main shift lever guide 21 or the fender side that is closer to the fender 8, and is not pivotally supported on the transmission case side, but is connected to the board wire 22 or the like to the mission case side.

The holes 8h, 8h on the top of the fender are holes for fixing the assist par 20, and the holes 8g, 8h on the front and sides of the fender are holes for fixing the assist par 20.
8g is a hole for fixing the step 18 and the fender 8.

As described above, the present invention has two reinforcing plates on the outer surface of the fender 8, a reinforcing plate that guards the fender base 8d, and an auxiliary reinforcing plate 8e, which are placed close to each other near the fender base 8d and separated at the outer periphery of the fender. Spot weld at an angle, form a fender recess 8C in a triangular area surrounded by the two reinforcing plates, protruding from the inside to the outside, and fit the gear shift lever guide into the recess 8C. The shift lever, which is rotated back and forth within the shift lever guide, is pivotally supported on the fender 8 side.
In the fender structure shown in Publication No. 1, the strength of the sheet metal fender is weak, and although the shift lever guide is attached to the fender, if the shift lever is pivoted to the fender side, the strength of the fender is weak and the shift lever cannot be shifted. Because of this, there was a risk that the fender would bend when rotating.

In contrast, in the present invention, two reinforcing plates are provided on the fender, which are arranged in the shape of a fan and spot welded, and a concave part for the gear shift lever guide is provided between these two welded plates, so that the gear shift lever can be easily moved. This made it possible to create a fender that does not bend even when rotated in the front-back direction.

Conventional fenders were made stronger by providing reinforcement to withstand bending loads from the sides, but such forces were not considered when rotating in the front-rear direction as there was no possibility of such forces being applied. It was.

The present invention effectively addresses this point. Since we were able to pivot the gear shift lever to the fender side in this way, there was no longer a need to extend the gear shift lever all the way to the transmission case side, which eliminated errors during assembly, and also prevented the need to rotate a gear lever that was too long when changing gears. Therefore, it was possible to eliminate the problem of the operating force being expanded too much due to the action of the lever, which could destroy the transmission shifter or transmission section.

[Brief explanation of the drawing]

Figure 1 is a side view of the rear of the agricultural tractor, Figure 2 is a plan view of the area around the seat, Figure 3 is a side view of the area around the fender, Figure 4 is a side view of the fender viewed from the outside, and Figure 5 is a side view of the fender. The front view and FIG. 6 are plan views of the fender.

Claims (1)

[Scope of utility model registration request] Two reinforcing plates, a reinforcing plate forming the fender base 8d and an auxiliary reinforcing plate 8e, are spot welded to the outer surface of the fender 8 so that they are close together near the fender base 8d and separated at the outer periphery of the fender. A fender recess 8C is formed in the triangular area surrounded by the two reinforcing plates, protruding from the inside to the outside, and a shift lever guide is fitted into the recess 8C. A fender for an agricultural tractor, characterized in that a gear shift lever that can be rotated back and forth is pivotally supported on the fender 8 side.