JPH06156147A - Structure for fitting step of operation unit of working vehicle - Google Patents

Abstract

PURPOSE:To fit a step of an operation unit easily at a low cost. CONSTITUTION:A loose-out preventing support part 13 to be engaged with an engagement part 12 of a support frame 10 of a machine body side so as to prevent the loose-out, an upper part support part 15 placed for positioning in the upper part of the support frame 10 and fitted thereto, and a support engagement part 17, which is positioned over the upper support part 15 and in which an engagement hole 16 formed in a step 9 of the operation unit is engaged freely to be loosen out in the vertical direction and freely to receive a load, are formed integrally with an elastic body to form a vibration insulating elastic body 11. Furthermore, the step 9 of the operation unit is fitted to a working vehicle through this vibration insulating elastic body 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving section step of a working vehicle in which a driving section step is attached to and supported by a supporting frame fixedly extended laterally from a machine body frame through a plurality of vibration-proof elastic bodies. Regarding mounting structure.

[0002]

2. Description of the Related Art In the step mounting structure for a driving part of a work vehicle, as shown in, for example, Japanese Utility Model Laid-Open No. 56778/1990, the upper and lower parts are connected and supported to the band-shaped support frame through a bracket. There has been a structure in which the operation section steps are placed and supported via vibration-proof rubbers provided with bolts on both sides, and tightened and fixed by nuts.

[0003]

SUMMARY OF THE INVENTION In the above conventional structure, in order to be as light as possible and have sufficient strength,
The strip-shaped support frame is arranged along the vertical direction, and the operation step is supported on the support frame via a vibration-proof rubber so that the load can be received. When mounting the step, weld a plurality of brackets to the support frame,
Moreover, after performing the nut tightening work, it is necessary to place the operation step and perform the nut tightening work again, resulting in a large number of parts and a large number of assembling steps, resulting in a high manufacturing cost. There was a flaw. The present invention aims to eliminate the above-mentioned problems.

[0004]

According to a characteristic configuration of the present invention, in a step mounting structure for a working portion of a work vehicle described at the beginning, a retaining support portion which is fitted and mounted in an engaging portion of the support frame so as to be capable of retaining, An upper support part that is positioned and engaged on the upper part of the support frame in a mounted state, and is located above the upper support part, and the fitting hole formed in the operation part step can prevent vertical disengagement and support load reception. The vibration-proof elastic body is formed by integrally molding each of the support engaging portions that are fitted into and engaged with the elastic body.

[0005]

When attaching the operation section step to the support frame, the retaining portion of the anti-vibration elastic body is elastically deformed with respect to the engaging portion of the supporting frame to be fitted and mounted to prevent the retaining portion. The mounting is completed simply by fitting and engaging the supporting hole of the vibrating elastic body while elastically deforming the fitting hole of the operating section step. The load due to the weight of the operator with respect to the driving step can be reliably received and supported on the upper surface of the support frame by the upper support portion of the elastic body through the connecting portion between the fitting hole and the support engagement portion. Therefore, it is possible to effectively prevent the lifting of the operation section step due to the vibration of the machine body by the support of the connecting portion between the fitting hole and the support engaging portion and the retaining support portion.

[0006]

As a result, it is sufficient to form the engaging portion and the fitting hole in the support frame and the operation step, respectively, and to install the bracket for exclusive use in mounting and the screw and nut for fastening and fixing. The number of parts is reduced because it is unnecessary, and the assembly work can be done only by the fitting work due to the deformation of the elastic body, and the work can be easily done without the need for tools, and the manufacturing cost can be reduced. It was

[0007]

Embodiments will be described below with reference to the drawings. Figure 4
Fig. 1 shows an agricultural tractor as an example of a work vehicle. In this agricultural tractor, an engine 2 is mounted in a hood 1 at the front of the machine body, and a transmission system is configured to transmit the power of the engine 2 to front and rear wheels 4 and 5 via a transmission case 3 and front and rear wheels 4 and 5. The boarding operation unit 6 is provided above the intermediate part of the vehicle 5. In the boarding operation unit 6, a driver's seat 8 is arranged between the left and right rear wheel fenders 7, 7, and driver's footrest operation units Steps 9, 9 are arranged on both left and right sides of the mission case 3. .

Next, the mounting structure of the operating section step 9 will be described. As shown in FIG. 1, step support frames 10 are laterally outwardly fixedly extended from the mission case 3 constituting the body frame to the left and right sides, and the operation section step 9 is provided with the anti-vibration rubber on the step support frames 10. 1
1 (an example of a vibration-proof elastic body) is used for vibration-proof support. That is, the step support frame 10 is formed by bending a strip-shaped steel body into a U shape in plan view, and the intermediate portion in the extending direction is reinforced and connected by the connecting portion 10a along the front-rear direction. Then, with respect to the step support frame 10, four vibration proof rubbers 11 are provided at each of the front and rear portions of the step support frame 10 to drive the operation step 9
Is placed and supported. As shown in FIG. 3, the anti-vibration rubber 11 is fitted with a through hole 12 (an example of an engaging portion) formed in the step supporting frame 10 in a horizontal direction, and is engaged with the head supporting shaft portion to prevent it from coming off. 13 [an example of a retaining support portion], which is fitted into a step engaging portion 14 formed on the upper surface of the step support frame 10 at a position on the upper side of the insertion hole 12 so as to rotate the shaft portion 13 about its axis. An upper support portion 15 that receives and supports a load from the upper side on the upper surface of the support frame 10 while blocking the same, and the upper support portion 15
Of the support engagement portion 17 which is located on the upper side of the operation portion 9 and which is fitted in the engagement hole 16 formed in the operation part step 9 so as to be able to prevent slipping out in the vertical direction and capable of receiving and supporting the load, and is integrally molded with rubber. Configured. The support engagement portion 17 is
A peripheral groove 17a is formed on the outer peripheral surface of the cylindrical portion so that the inner peripheral edge of the fitting hole 16 of the operating portion step 9 is fitted therein, and the peripheral edge of the fitting hole 16 is fitted into the peripheral groove 17a. The lower inner surface of 17a receives and supports the load. When the driving section step 9 is attached by the vibration damping rubber 11 integrally formed of rubber in this manner, for example, the support engagement portion 17 of the vibration damping rubber 11 is fitted into the fitting hole 16 of the driving section step 9.
Is elastically deformed and fitted into the circumferential groove 17a to engage and connect the headed shaft portion 13 with the insertion hole 12 of the support frame 10 while elastically deforming the head 13a. By using the anti-vibration rubber 11 without using a support bracket or the like,
It will be possible to install and fix just by. A long cushion rubber 23 is attached to the extending portion of the support frame 10 in the front-rear direction so that the driver's step 9 comes into contact with and receives and supports the driver's step 9 when he / she gets on and off.

A cushion rubber 19 for restricting the operation of the operation pedal 18 such as a main clutch pedal and a brake pedal provided in the driving section at a non-operation position is similarly formed on the support frame 10 as shown in FIG. Shaft portion 21 with head to be inserted and mounted while elastically deforming into the front-back insertion hole 20
Support part 2 which is configured so as to prevent slipping and is supported by the lower surface of the support frame 10 by abutting engagement with the lower surface of the support frame 10.
The operation pedal 18 is configured to be contacted and restricted by the lower surface of 2, so that a dedicated mounting bracket or the like is not required and can be easily attached.

It should be noted that reference numerals are added to the claims to facilitate the comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a perspective view showing a mounting state of a driving section step.

FIG. 2 is a side view of a notch showing a mounting state of a driving section step.

FIG. 3 is a diagram showing a connected state of a vibration-proof rubber.

FIG. 4 is an overall side view of an agricultural tractor.

[Explanation of symbols]

 3 Airframe Frame 9 Operation Step 10 Support Frame 11 Vibration-proof Elastic Body 12 Engagement Part 13 Detachment Support Part 15 Upper Support Part 16 Fitting Hole 17 Support Engagement Part

Claims (1)

[Claims] 1. A plurality of elastic bodies (1) for vibration isolation are mounted on a support frame (10) fixedly extending laterally from a body frame (3).
1) A drive unit step mounting structure for a working vehicle in which a drive unit step (9) is mounted and supported via 1), and the drive unit step (9) is fitted and mounted in an engaging portion (12) of the support frame (10) so as not to come off. The retainer support part (13), the upper support part (15) which is positioned and engaged with the upper part of the support frame (10) in a mounted state, and is located on the upper side of the upper support part (15). 9) Fitting hole (1)
Each of the support engaging portions (17), which are fitted and engaged with each other in such a manner that 6) can be prevented from slipping out in the vertical direction and capable of receiving and supporting the load, is integrally molded with an elastic body to form the vibration-proof elastic body (11). A step mounting structure for the driving section of a working vehicle.