JPS5936971Y2 - tractor - Google Patents

Description

[Detailed description of the invention] The present invention relates to a tractor equipped with a guard frame, and the present invention provides a simple structure for three parts: the mounting seat for the pillar of the guard frame, the mounting part of the mounting body of the lower link's rolling restraint system, and the rear axle case. The purpose of this is to make it possible to integrate it into a strong and strong structure.As a distant relative of this purpose, the tractor body is equipped with a guard frame. Attach a pair of left and right mounting seats with struts fixed directly above the rear axle case, respectively, and install left and right integrated mounting bodies below the mounting seats on the bottom surface of each rear axle case, and attach the rear axle case to each mounting body. A flat attachment part that is attached to the lower surface, and a holding part that is provided below from the bottom of the rear axle case in the attachment part and holds one end of the roll restraining member of the lower link,
C-shaped reinforcement in which the mounting seat and the mounting part are made to protrude in the same direction with respect to the front-rear direction with respect to the rear axle case, and between these protruding parts, a vertical wall part connecting the upper and lower walls is provided. The vertical wall of the reinforcing material is in contact with one of the front and rear surfaces of the rear axle case, and the upper and lower walls are fixed to the mounting seat and each protrusion of the mounting part. That is.

Hereinafter, the first embodiment of the present invention will be explained based on the drawings of FIGS. 1 to 3. Reference numeral 1 denotes a tractor body, and a hydraulic device 2 for lifting and lowering the working machine is mounted on the rear upper surface of the vehicle body 1. At the same time,
A pair of left and right rear axle cases 3 are protruded outward from both rear ends of the vehicle body 1, and a rear wheel 5 is provided at the outer end of each case 3 via a final reduction mechanism built in the final reduction case 4. .

Reference numeral 6 denotes a pair of left and right lower links, which are pivotally supported on both sides of the rear end of the vehicle body 1, and are connected to a lift rod 8 by a lift arm 7 of the hydraulic system 2.
It can be raised and lowered freely through the.

9 is a top link provided on the rear end surface of the vehicle body 1, and 10 is a fender of the rear wheel 5 provided in each rear axle case 3.

Reference numeral 11 denotes a lateral vibration restraining member for the pair of left and right lower links 6, and although a check chain is used as an example in the embodiment, this restraining member 11 may also be a rod or the like.

The rear end portion of each restraint member 11 is attached to a midway portion of each lower link 6, and the front end portion is attached to each rear axle case 3 via an attachment member 12.

Each of the mounting bodies 12 has a rectangular plate-shaped flat mounting part 13 at its upper end, and the front part of the mounting part 13 is attached to the rear axle case 3.
It is removably attached to the mounting part 1 with the mounting bolt 14.
3 has a rear end portion projecting rearward from the rear axle case 3, and the projecting portion serves as a mounting portion 15 for a member to be attached to the vehicle body 1. The mounting portion 15 has a pair of left and right holes, as illustrated by holes. A fixture insertion portion 16 is formed.

A plate-shaped holding part 17 is provided diagonally rearward and downward from the lower surface of the front part of the mounting part 13 located directly below the rear axle case 3, and a pair of mounting holes 18 are formed in this holding part 17. A pin 19 inserted into the front end of the restraining body 11 is inserted into one of these mounting holes 18 to allow the front end of the restraining body 11 to be detachably held on the mounting body 12.

Reference numeral 20 denotes a guard frame removably attached to the vehicle body 1, which consists of a pair of left and right columns 21 and a zenith frame 22 with a gutter bottom at the upper end of the columns 21. In the embodiment, in order to form a sunshade above the seat 23, Sheet 24 on the zenith frame 22
is being extended.

Each of the pillars 21 is inclined backward, and is bent and hollowed in the middle to widen the space between the upper ends of both branches 21, and a rectangular plate is provided at the lower end of each pillar 21 to attach each pillar 21 to the rear axle case 3. A mounting seat 25 shaped like the shape is fixedly protruded horizontally from the rear.

Then, the front part of the mounting seat 25 to which the support column 21 is fixed is placed directly above the mounting part 13 of each mounting body 12 on the rear axle case 3.
Detachably attach it to the mounting bolt 26 and attach it to the mounting seat 2.
5 has a rear end portion projecting rearward from the rear axle case 3, the projecting portion serves as a reinforcing material mounting portion 27, and a fixture insertion portion 28, which is illustrated as a pair of holes, is formed in the mounting portion 27. There is.

Reference numeral 29 denotes a reinforcing member that fits into the C-shaped member, and is provided with upper and lower walls and a vertical wall that connects the front ends of the upper and lower walls.The reinforcing member 29 is installed with the opening facing rearward and sideways. Attachment part 1 of body 12
5 and the mounting portion 27 of the mounting seat 25, and the vertical wall portion is brought into contact with the rear surface of the rear axle case 3.

Then, a fixing device 31, which is illustrated by way of a bolt, is inserted into a pair of left and right fixing device insertion portions 30 formed on the upper and lower walls of the reinforcing member 29, and into each of the fixing device insertion portions 28 and 16 of the mounting portion 27 and the mounting portion 15, respectively. Insert the nut 32 into the fixing tool 31, thereby attaching the reinforcing member 29 to the mounting seat 25 and the mounting body 1.
It is installed on 2.

In the first example of rotation, for example, when the tractor rotates backward, the zenith frame 22 hits the ground, and a forward impact force acts on the upper end of each support column 21.

In this case, in the past, the strut was attached to the rear axle case only by the mounting bolt of the mounting seat, so that stress due to the above-mentioned impact force acted intensively on the mounting bolt.

Therefore, even when the impact force acting on each strut is not very large, there is a risk that the mounting bolts, mounting seats, or a portion of the rear axle case may be damaged or broken.

However, in the first embodiment, the mounting seat 25 is attached to the mounting body 12 via the reinforcing member 29, and the rear axle case 3
Since the lower end of the support column 21 is fixed in such a manner that the support column 25 The stress caused by the impact force acts in a distributed manner on the mounting holes 26 and 14 of the mounting body 12.

Therefore, even if a large impact force is applied to the upper end of the support column 21, the stress acting on each mounting bolt 14, 26 is small, and the stress acting on each mounting bolt 14, 26, mounting seat 25. There is little risk that the rear axle case 3 or other components will be damaged or damaged.

FIG. 4 shows a comparative example of the present invention, in which a reinforcing part 33 in the shape of a lateral hole is integrally lowered from the rear end of the mounting seat 25, and each fixing device integrally formed on the left and right is inserted at the lower end of the reinforcing part 33. Part 30
Then, a fixture 31 is inserted into each fixture insertion portion 16 of the mounting portion 15, and a nut 32 is screwed onto the fixture 31, thereby integrating the mounting seat 25 with the mounting body 12.

Further, the lower end of the support column 21 is fixed to a substantially central portion of the mounting seat 25 in the front-rear direction.

In the comparative example, compared to the first example, the number of parts is reduced by the number of fixtures for attaching the reinforcing material to the mounting seat, and the structure is simplified.

FIG. 5 shows a second embodiment of the present invention, in which the attachment part 13
The front end of the is made to protrude forward from the rear axle case 3, and this protrusion is used as the mounting part 15. U-shaped notches are formed on the left and right sides of the mounting part 15, and the notches are used as the fixing device insertion part 16. It is said that

In addition, as shown by the imaginary line, the rear end of the attachment part 13 is also shaped to protrude rearward from the rear axle case 3, so that the protrusion is connected to the attachment part 1.
It may be set to 5.

The present invention is as described above, and the mounting seat and the mounting portion are made to protrude in the same direction with respect to the front-rear direction with respect to the rear axle case, and the upper and lower walls are connected between these protrusions. Fit the C-shaped reinforcing member with the vertical wall portion to the mounting seat and the mounting portion with the vertical wall portion of the reinforcing material in contact with one of the front and rear surfaces of the rear axle case. Since it is fixed to each protruding part of the mounting plate, the mounting seat, the mounting part of the mounting body, and the rear axle case can be strongly integrated with a simple structure using the reinforcing material.
The mounting strength of the guard frame pillar and the side of the roll restraint system to the rear axle case, as well as the strength of the parts where both of the above are attached to the rear axle case, can be increased, even if impact force is applied to the guard frame in the event of a fall. , the impact force can be sufficiently absorbed, and there is little risk that the mounting seat, rear axle case, etc. will be damaged or damaged.

In addition, the support of the guard frame is fixed to the mounting seat directly above the rear axle case, and the holding part of the rolling restraint is fixed to the mounting part of the rear axle case directly below the support of the guard frame. Since the holder and the holding part are not fixed to the mounting seat or the protruding part of the mounting part, the load of the guard frame, the impact of falling, or the tensile force acting on the roll restraint system, etc. A large bending moment does not occur in the attachment portion of the attachment seat and the attachment portion to the rear axle case, and the structure is simple and can be manufactured at low cost.

[Brief explanation of the drawing]

Fig. 1 is a rear view of a tractor equipped with a first embodiment of the present invention, Fig. 2 is an enlarged sectional view taken along the line ■-■ in Fig. 1, Fig. 3 is a perspective view of the mounting body, and Fig. 4 5 is a sectional view showing a comparative example of the present invention, and FIG. 5 is a bottom view showing a second embodiment of the present invention. 1... Tractor body, 3... Rear axle case, 6... Lower link, 11... Rolling restraint system, 12... Mounting body, 13...
・Flat attachment part, 15...Mounting part, 17...
...Holding part, 29.33...A member attached to the vehicle body.

Claims (1)

[Scope of utility model registration request] A guard frame is provided on the tractor body, and a pair of left and right mounting seats, each with a guard frame column fixed directly above the rear axle case, are attached to the upper surface of each rear axle case protruding from the left and right sides of the rear of the tractor body. A pair of left and right mounting bodies are arranged below the mounting seat on the bottom surface of the rear axle case, and each mounting body has a flat mounting part that is mounted on the bottom surface of the rear axle case, and a flat mounting part that is mounted on the bottom surface of the rear axle case, and a The mounting seat and the mounting part are installed in the same direction in the longitudinal direction with respect to the rear axle case. A C-shaped reinforcing member, which has upper and lower walls and a vertical wall that connects the upper and lower walls, is fitted between these protruding parts, and the vertical wall of the reinforcing member is connected to the front and rear surfaces of the rear axle case. With it in contact with one side,
A tractor characterized in that each of the upper and lower walls is fixed to each protrusion of the mounting seat and the mounting part.