JPH0215700Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a differential lock operating device for a vehicle such as a tractor.

(Prior art) A tractor is equipped with a pair of rear wheel fenders on both left and right sides of the rear of the vehicle body, and both rear wheel fenders are connected by a floor sheet that covers the rear of the vehicle body from above and has a seat on the upper side. A pair of rising parts are provided on both left and right sides of the front part of the floor seat, and the lower end of each rising part is fixed to the rear end of a pair of steps protruding from the vehicle body on both sides. Some are equipped with a deflock operating device.

As a defrock operating device, a mounting bracket is provided on the rear surface of the rising section on one side, and the mounting bracket includes a mounting section fixedly installed on the rear surface of the rising section, and a pair of mounting sections protruding rearward from both left and right ends of the mounting section. Both support parts are rotatably provided with interlocking shafts which are interlocked with the deflock device and to which a deflock pedal above the step is fixedly attached.

(Problem to be solved by the invention) However, in the past, the mounting bracket was simply fixed to the rising part of the floor sheet, which is not very strong. There have been cases where the front part of the metal fitting undergoes permanent deformation such that the lower part of the part moves rearward and the upper part moves forward.

In the above case, the differential pedal is rotated downward from its normal position, and the distance between the tip of the pedal and the step becomes smaller. There was also a fear that the stroke amount would become smaller, making it impossible to operate the deflock.

SUMMARY OF THE INVENTION An object of the present invention is to provide a defroster operating device that does not cause permanent deformation of the front portion of the mounting bracket at the upright portion and prevents the defroc operation from becoming impossible.

(Means for solving the problem) In order to achieve the above object, the feature of the present invention is that the rear end of the step 7 is in contact with the rear surface of the mounting part 19 and the mounting bracket 18 is directed to the rear side. This is because a reinforcing metal fitting 35 that restricts movement is fixed.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings. In FIG. 2, reference numeral 1 denotes a tractor body, which is composed of an engine 2 and a transmission case 3 connected to the rear thereof. 4 is the bonnet, 5 is the front wheel, 6
is the rear wheel. Reference numeral 7 denotes a pair of left and right steps, which protrude laterally from both left and right sides of the mission case 3 at a midway point in the longitudinal direction. Reference numeral 8 denotes a pair of left and right rear wheel fenders, which are arranged on both sides of the rear part of the transmission case 3. A differential device that transmits power to both rear wheels 6 is provided in the rear portion of the transmission case 3, and the differential device is provided with a differential lock device that releasably deflocks the differential device.

As shown in FIG. 1, a rear axle case 10 projects laterally from both rear sides of the transmission case 3 via a brake case 9 containing a built-in brake device.

Reference numeral 12 denotes a hydraulic system for lifting and lowering the working machine, which is mounted on the rear part of the transmission case 3.

A floor sheet 13 covers the rear part of the transmission case 3 and the rear part of the hydraulic system 12 from above, and connects both the left and right rear wheel fenders 8.
The floor sheet 13 has a pair of rising parts 14 located at its front end and rising up on both left and right sides of the mission case 3, and a pair of rising parts 14 located halfway in the front-rear direction and sloped downward in the front. An equipment part 15 is provided which is connected to the rising part 14 at the front end.

Each rising portion 14 is arranged behind the step 7, and its lower end portion is detachably fixed to the rear end surface of the step 7, and a seat 16 is provided on the equipment portion 15.

As shown in FIGS. 3 and 4, reference numeral 18 denotes a mounting bracket, which is disposed at the rear of the lower part of the right rising portion 14, and has a U-shape that opens rearward in plan view. The mounting portion 19 includes a mounting portion 19 fixed to the mounting portion 19, and a pair of left and right support portions 20 projecting rearward from both left and right end portions of the mounting portion 19.

Reference numeral 22 denotes an interlocking shaft, which is laterally inserted through both support parts 20 so as to be rotatable, and has an L on a part projecting to the right from the right support part 20 and a part projecting to the left from the left support part 20, respectively. Type-shaped deflock pedal 2
3 and an interlocking lever 24 are fixedly installed, and these are as follows.
It passes through windows 25 and 26 formed in the right rising portion 14 and extends diagonally upward and forward.

The interlocking lever 24 is interlocked with the differential lock device via an interlocking rod 28, an operating lever 29, and a support shaft 30. The support shaft 30 is rotatably supported by the brake case 9 via a support base 31, and 30
An actuating lever 29 is fixedly attached to.

Reference numeral 33 denotes a return spring, which is elastically interposed between the interlocking rod 28 and the operating lever 29, and urges the differential pedal 23 in the upward direction, that is, in the direction of releasing the differential.

Reference numeral 35 denotes a rectangular plate-shaped reinforcing metal fitting, the lower end of which is detachably attached to the rear end surface of the step 7 together with the right rising portion 14 by a pair of left and right bolts 36.
The reinforcing metal fitting 35 has the same length as the mounting part 19 in the left-right direction, and its upper part contacts the rear surface of the mounting part 19 over the entire length in the left-right direction, so that the reinforcing metal fitting 19 has the same length as the mounting part 19 in the left-right direction.
8. Movement to the rear is restricted.

The lower end of the right rising portion 14 may be attached to the rear end surface of the step 7 only by the pair of left and right bolts 36, or may be attached by other bolts as well.

According to the embodiment configured as described above, when operating the deflock, the deflock pedal 23 is depressed, thereby causing the interlocking shaft 22 to rotate together with the interlocking lever 24. Then, the operating lever 29 is moved to the support shaft 30 via the interlocking rod 28.
At the same time, the differential gear is rotated to operate the differential locking device.

Also, when releasing the differential lock of the differential device,
The pressing force on the differential gear pedal 23 is released, and the elastic force of the return spring 33 causes the differential gear pedal 23 and the like to return to their original positions, thereby releasing the differential lock of the differential gear.

In this case, since the reinforcing metal fitting 35 restricts the rearward movement of the mounting metal fitting 18, the front side portion of the mounting metal fitting 18 at the right rising portion 14 is moved by the operating force during the defrock operation. There is no permanent deformation such as the lower part of the part moving rearward and the upper part moving forward, and therefore the stroke amount of the deflock pedal 23 becomes smaller, making it possible to perform the deflock operation. There is no danger that it will disappear.

(Effects of the invention) As detailed above, according to the invention, there is no permanent deformation of the front part of the mounting bracket at the rising part, and therefore the stroke amount of the differential pedal is small. There is no risk that the defroc lock will become inoperable. The present invention has the above advantages and is of great practical benefit.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Figure 1 is a longitudinal sectional view of the main parts, Figure 2 is a side view of the tractor, and Figure 3 is a side view of the tractor.
The figure is a sectional view taken along the line A-A in Figure 1, and Figure 4 is a cross-sectional view taken along the line A-A in Figure 1.
It is a sectional view taken along the line BB in the figure. 1... Tractor body, 7... Step, 8...
Rear wheel fender, 13... Floor seat, 14...
Rising part, 16...Seat, 18...Mounting bracket, 1
9...Mounting part, 20...Supporting part, 22...Interlocking shaft, 23...Diff lock pedal, 35...Reinforcing metal fittings, 36...Bolts.

Claims (1)

[Scope of utility model registration request] A pair of rear wheel fenders 8 on both left and right sides of the rear of the vehicle body 1
The two rear wheel fenders 8 are connected by a floor sheet 13 that covers the rear part of the vehicle body 1 from above and has a seat 16 on the upper side.
3. A pair of rising parts 14 are provided on both left and right sides of the front part, and the lower end of each rising part 14 is fixed to the rear end of a pair of steps 7 projecting from the vehicle body 1 on both sides. , a mounting bracket 18 is provided on the rear surface of the rising portion 14 on one side, and the mounting bracket 18 includes a mounting portion 19 that is fixedly installed on the rear surface of the rising portion 14, and a pair that protrudes rearward from both left and right end portions of the mounting portion 19. support part 20 of
, and both support parts 20 are rotatably provided with an interlocking shaft 22 which is interlocked with the deflock device and operated by the deflock pedal 23, and the rear end of the step 7 is in contact with the rear surface of the mounting part 19. A defroster operating device characterized in that a reinforcing metal fitting 35 is fixedly installed to prevent the mounting fitting 18 from moving rearward.