JPS6027737Y2 - Mounting structure of rear wheel fender on agricultural tractor - Google Patents

Description

[Detailed description of the invention] The present invention relates to the mounting structure of the rear wheel fender of an agricultural tractor, and is very unique in that there is a lower link of a three-point linkage mechanism between the tractor body and the rear wheel and at the rear. The purpose is to improve work such as tightening bolts in narrow and limited spaces, and to prevent deformation of the fender mounting base and check chain mounting base due to tightening of bolts, so that they can be firmly fixed. be.

In agricultural tractors, fender mounting bases and check chain mounting bases are arranged on the upper and lower sides of the rear axle case, and these mounting bases are horizontally held up and down by multiple tightening bolts on both the front and rear sides of the rear axle case. It has been proposed that the rear wheel fender be fastened to the mounting portion of the fender mounting base using bolts.

In such a case, when assembling the fender mount and check chain mount to the rear axle case, for example, the mounts should be brought into contact with the rear axle case from both the top and bottom.
Next, after inserting the tightening bolts vertically across each mounting base,
This tightening bolt is tightened from the upper end side, but the bolt tightening work is very complicated.

In other words, the places where these mounts are attached are the mount abutting parts formed on the top and bottom of the rear axle case, which is a very narrow space sandwiched between the tractor body and the rear wheels. There is a lower link with a point link mechanism, and the rear wheel fender is located between the tractor body and the rear wheels, making it difficult to perform maintenance work due to the space. However, in the structure of a normal fender mount, the fender mounting part is located in the center of the fender mount, or in a part that is vertically attached to the tightening bolt, so the mounting part becomes an obstacle. However, tightening the bolts becomes extremely difficult.

It is also considered that an engagement recess into which the tightening bolt engages is formed in the rear axle case, thereby regulating the lateral position of each mounting base, but the engagement recess is only located in the center vertically. If so, the tightening position of the tightening bolt protrudes front and rear from the mounting base contact part of the rear axle case, so when the tightening bolt is strongly tightened, the part protruding from the rear axle case of each mounting base In order to prevent this deformation, it is necessary to take measures such as constructing the mounting base from a thick material.

This invention solves these problems,
Its features are that rear wheels are provided on both sides of the tractor body through rear axle cases that protrude laterally outward, and a pair of left and right lower links of a three-point linkage are installed on both sides of the rear of the tractor body. A fender mount is placed on the top surface of the rear axle case where the mount abuts, and a check chain mount is placed on the bottom surface of the mount. The upper and lower sides are tightened horizontally using a plurality of tightening bolts on both front and rear sides, the rear wheel fender is attached to the mounting part of the fender mounting base with bolts, and the check chain mounting base 13 is provided with a bracket part 22 that protrudes downward.
This is an agricultural tractor in which a check chain 23 of the lower link 5 is connected to the bracket part 22, and the fender mounting base 12 is attached to the fender mounting base 12 so as to be laterally removed from the upper area of the area surrounded by the plurality of tightening bolts 14. The mounting portion 17 is provided, and protrusions that protrude forward and backward are provided on both the front and rear sides of the rear axle case 6, and each of the protrusions is provided with the above-mentioned mounting base abutting portions 10 and 11 on the upper and lower sides of the rear axle case 6. The vertical engagement groove 21, in which each bolt 14 engages, is cut out in a concave shape so that the bolts 14 engage with each other.

Hereinafter, the present invention will be described in detail with reference to the illustrated embodiment. In the figure, 1 is a tractor body, and a hydraulic device 3 for raising and lowering a working machine is provided on a rear casing 2 of the tractor body.

The hydraulic system 3 has a pair of left and right lift arms 4, and lifts a work machine attached to the rear of the tractor body 1 via a three-point linkage mechanism consisting of a pair of left and right lower links 5 and a top link (not shown). It can be raised and lowered by the rod 5a.

The lower link 5 is pivotally supported on the base end side of a rear axle case 6 mounted on both sides of the rear casing 2 so as to be vertically movable.

A rear axle 7 is rotatably inserted into each rear axle case 6,
A rear wheel 9 is attached to the outer end of this rear axle 7 via a disc 8.

Mounting base abutting portions 10.1 are provided on both upper and lower sides of each rear axle case 6.
1 are respectively formed, a fender mount 12 is arranged in the mount abutting part 10 on the upper surface side, and a check chain mount 13 is arranged in the mount abutting part 11 on the lower surface side, respectively.
These mounting bases 12 and 13 are horizontally fastened vertically on both front and rear sides of the rear axle case 6 by two tightening bolts 14.

The fender mounting base 12 is the mounting base contact portion 1 of the rear axle case 6.
0, an intermediate support portion 16 protruding from the substrate portion 15, a mounting portion 17 fixedly mounted on the intermediate support portion 16, etc., and four fasteners. The mounting portion 17 is provided so as to be offset laterally outwardly with respect to the base plate portion 15 so as to be laterally outwardly removed from the upper region surrounded by the bolt 14.

The mounting board 20 of the rear wheel fender 19 is attached to the mounting portion 17 of the fender mounting base 12 with a plurality of bolts 18 .

Each tightening bolt 14 is engaged with an engagement groove 21 to restrict its lateral position, and each engagement groove 21 is formed in a protrusion provided on both front and rear sides of the rear axle case 6 so as to protrude forward and backward. It is formed in a concave shape so as to reach the above-mentioned mounting base abutting portions 10.11 on the upper and lower sides of the rear axle case 6, so that each mounting base 12
, 13 are supported by the mounting base abutment portion 10.11 of the rear axle case 6 up to the vicinity of the tightening position by the tightening bolt 14, and the mounting base 12 is tightened by tightening the tightening bolt 14.
．． 13 can be prevented from deforming.

Each check chain mount 13 is provided with a bracket portion 22 projecting downward on the outer end side, and a check chain 23 of the lower link 5 is connected to the bracket portion 22.

The check chain 23 has a telescopic adjustment section 24 .

25 is an operator seat.

In the above embodiment, when assembling the mounting bases 12 and 13 to the rear axle case 6, for example, insert the tightening bolt 14 from below across the upper and lower mounting bases 12 and 13, and screw the nut into the upper end of the bolt 14. to conclude the agreement.

In this case, the fender mounting base 12 has a mounting portion 1 located outside the upper area surrounded by each tightening bolt 14.
7, the tightening bolt 14 is sometimes tightened at the mounting part 17.
This does not pose an obstacle and the work is easy.

Further, the tightening bolt 14 and the like do not become an obstacle when tightening the bolt 18.

Therefore, the mounting bases 12 and 13 are installed between the tractor body 1 and the rear wheels 9, and the rear wheel fender 19 is located between them, and the lower link 5 is located at the rear. Tightening bolts 14 and 18 can be relatively easily tightened even under restricted conditions.

In the present invention, the fender mounting base 12 is arranged so that the plurality of tightening bolts 14 come off laterally from the upper area of the surrounding area.
Since the rear wheel fender 19 is attached to the mounting portion 17 with bolts 18, the tightening bolt 1
The mounting part 17 does not become an obstacle when tightening 4.
Further, when tightening the bolt 18, the tightening bolt 14 side does not become an obstacle.

Therefore, the mounting portions 12 and 13 are mounted between the tractor body 1 and the rear wheels 9, and the rear wheel fender 19 is located between them, and the lower link 5 is located at the rear. Even under restricted conditions, the tightening bolts 14 and bolts 18 can be easily operated, and work efficiency is significantly improved.

In particular, since the tightening bolt 14 is used to vertically fasten the fender mount 12 and the check chain mount 13,
The fact that it can be tightened easily is very useful for disassembling and assembling work during maintenance and inspection.

In addition, protrusions that protrude forward and backward are provided on both the front and rear sides of the rear axle case 6, and each of the protrusions is provided so as to reach the upper and lower mounting base contact portions 10 and 11 of the rear axle case 6. Since the vertical engagement groove 21 in which the bolt 14 engages is formed in a concave shape, each mounting base 12.13 is supported by the mounting base contact portion 10.11 until the tightening position by the tightening bolt 14 is reached. Therefore, when the tightening bolt 14 is tightened, the mounting base 12
．． 13 can be prevented from deforming, and each mounting base 12, 13 can be firmly fixed to the rear axle case 6.

In particular, a huge force acts on the check chain mount 13 from the check chain 23 side, but by doing the above, it is possible to prevent the mounts 12.13 from deforming due to that force. Even if 13 is made of a relatively thin member, it can be used satisfactorily, making it possible to reduce manufacturing costs and weight.

In addition, since the check chain mount 13 is provided with a bracket portion 22 that protrudes downward, this bracket portion 22
functions as a reinforcement for the check chain mounting base 13,
The combination of the above-mentioned effects enables firm fixation.

Furthermore, since the check chain 23 is connected to the bracket portion 22 that protrudes downward, even though the check chain mounting base 13 is located below the rear axle case 6, the check chain 23 is connected even when the lower link 5 is raised. There is no interference with the rear axle case 6, and smooth movement can be ensured.

[Brief explanation of the drawing]

The drawing is a rear view of the right half of a tractor showing an embodiment of the present invention. 1... Tractor body, 5... Rear link, 6... Rear axle case, 9... Rear wheel,
10.11...Curved mounting base contact part, 12...Fender mounting base, 13...Check chain mounting base, 14...Tightening bolt, 17... ...Mounting part, 19...Rear wheel fender, 21...
Engagement groove, 23...Check chain.

Claims (1)

[Scope of utility model registration request] Rear wheels 9 are provided on both sides of the tractor body 1 via rear axle cases 6 that protrude laterally outward, and a pair of left and right lower links 5 of a three-point linkage mechanism are installed on both sides of the rear of the tractor body 1. The rear axle case 6 is movably pivoted, and a fender mount 12 is disposed at the mount abutment part 10 on the upper surface of the rear axle case 6, and a check chain mount 13 is arranged at the mount abutment part 11 on the lower surface of the rear axle case 6. 13 are fastened vertically on both the front and rear sides of the rear axle case 6 with a plurality of tightening bolts 14,
Attach the rear wheel fender 19 to the mounting portion 17 of the fender mounting base 12 with bolts 18, and then attach the check chain mounting base 13 to the rear wheel fender 19.
An agricultural tractor is provided with a bracket portion 22 projecting downward, and a check chain 23 of a lower link 5 is connected to the bracket portion 22, and the tractor is configured to connect the check chain 23 of the lower link 5 to the bracket portion 22. The mounting portion 17 is provided on the fender mounting base 12 so that it can be removed laterally, and protrusions that protrude forward and backward are provided on both front and rear sides of the rear axle case 6. A rear wheel fender for an agricultural tractor, characterized in that a vertical engagement groove 21 in which each of the bolts 14 engages is formed in a concave shape so as to reach the side of each mounting base abutment part 11. mounting structure.