JPH045399Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a shock absorbing bumper that is attached to the front or rear surface of a working vehicle such as a tractor.

[Conventional technology]

BACKGROUND ART Bumpers are attached to the front and rear surfaces of work vehicles such as tractors to protect the vehicle body. To give a specific example, as shown in FIG. 3, supporting members 2', 2' are fixed to the guard member 1 by means such as welding, and the base end sides of the supporting members 2', 2' are fixed to the guard member 1 by means such as welding. The bumper is attached by fixing the portion to the vehicle body frame 3 using means such as bolt tightening.

[Problem that the invention attempts to solve]

However, in the conventional bumper configured as described above, the guard member 1 constituting the front part is fixed to the vehicle body frame 3 via the supporting members 2', 2'. As a result of the impact received during a collision being directly transmitted to the vehicle body frame 3, it is necessary to improve the strength of the vehicle body frame 3 and its constituent members. Another problem is that the bumper is deformed and damaged every time there is a collision.

In addition, in the above conventional configuration, only the proximal portions of the supports 2', 2' for the guard member 1 are fixed to the vehicle body frame 3, so the mounting strength of the guard member 1 to the vehicle body is low, and the vehicle body is It was not possible to suspend the guard member 1 when lifting it. It should be noted that various purposes can be considered for lifting the vehicle body, such as lifting the vehicle in order to escape when the vehicle has entered a depression.

The present invention was developed in view of the above-mentioned circumstances, and its purpose is to provide the bumper itself with a buffering function and increase the strength of the bumper attachment to the vehicle body through simple modification. .

[Means for solving problems]

The bumper guard member for shock absorption of a work vehicle according to the present invention is provided with U-shaped curved portions at both ends, and the guards are attached to the tips of a pair of left and right rod-shaped supports whose base sides are supported by the vehicle body frame. The base sides of the curved portions of the members are connected, and the ends of the curved portions of the guard member are connected to intermediate portions in the longitudinal direction of both the support members, and further, the both support members are connected to each other. is on both front and rear sides sandwiching the connection point between the intermediate portion in the longitudinal direction and the end portion of the guard member,
The vehicle is movably inserted and supported by a support stay protruding from a holder connected to the vehicle body frame, and a shock absorber is disposed between the holder and the guard member. do.

The functions and effects of this characteristic configuration are as follows.

[Effect]

According to the impact-absorbing bumper having such a structure, the guard member is supported by a supporting member that is movable in the front-rear direction, and the impact-absorbing body is disposed between the holder and the guard member, so that the impact at the time of a collision is reduced. The impact transmitted to the vehicle body frame is absorbed by the movement of the guard member in the front-rear direction together with the support member that supports it and the deformation of the impact absorber, thereby buffering the impact transmitted to the vehicle body frame.

In addition, the front and rear shock absorbing bumpers are supported by support stays of the holder at at least two places in the front and rear and left and right directions with respect to the vehicle body, and guard members are also connected to the support stays at two places in the front and rear, and the U Since the structure is such that the support member is supported by support stays on both sides of the connection point between the end of the guard member curved in a letter shape and the support member, for example, the guard member of a shock absorbing bumper can be suspended to support the vehicle body. The shock-absorbing bumper has a highly durable structure that can withstand even when lifted.

[Effect of idea]

Therefore, according to the present invention, since the strength of the guard member and the supporting material for supporting the guard member on the vehicle body frame is structurally high, the bumper is used to suspend the vehicle body using the bumper. In addition to being able to withstand large loads even when a large load is applied to it, it also has high shock absorption performance due to the deformation of the shock absorber and the movement of the support material back and forth, so it has good shock absorption performance in the event of a collision with a work vehicle. The guard member is less likely to be deformed due to impact, and the effort required to repair or replace the bumper parts can be reduced.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the drawings.

As shown in FIG. 2, a driver's seat 11,
A steering handle 12 and a speed change transmission section 13 are provided, and an engine 14 is provided on the front side thereof,
Further, a pair of left and right front wheels 15 are provided at the front and rear of the vehicle body 10,
15 and rear wheels 16, 16 are provided respectively, and this front wheel 1
5, 15 and the middle part of the rear wheels 16, 16, the vehicle body 1
Lawn mowing equipment 17, which is capable of mowing work regardless of whether the moving direction of the lawn mower 0 is forward or backward, is suspended by a hydraulic cylinder 18 so as to be movable up and down. has been configured.

Now, to explain the shock absorbing bumper of the present invention in detail, a holder 4 is connected to the front part of the vehicle body frame 3 as shown in FIG. C-shaped main body 4a
It has a structure in which proximal stays 4b, 4b and distal end stays 4c, 4c as flange-shaped support stays are provided on the left and right sides of the body, respectively. Then, the proximal stays 4b, 4b and the distal stay 4
c and 4c have through holes through which a pair of left and right rod-shaped supports 2, 2 whose tips are fixed to the guard member 1 made of pipe material constituting the front part of the shock-absorbing bumper of the present invention are inserted, respectively. Each of them is perforated.

In addition, as described above, the left and right ends of the guard member 1 to which the distal ends of the supporting members 2, 2 are fixed are arranged so that the overall planar shape is C-shaped, that is, when only the left and right ends are viewed, the guard member 1 has a U-shape in plan view. The guard member 1 and the left and right support members 2, 2 are integrated with each other by being curved and deformed so that the guard member 1 and the left and right support members 2, 2 are fixed to the center portions of the support members 2, 2, respectively.

The guard member 1 and the supporting members 2, 2 integrated in this way can be moved in the front-back direction by passing the supporting members 2, 2 through the through holes formed in each of the stays 4b, 4c of the holder 4. The proximal end portion and midway portion thereof are supported while being maintained in a stable state.

Further, between the guard member 1 and the holder 4, more specifically, between the guard member 1 and the distal end side stays 4c, 4c of the holder 4, rubber receivers are provided at the front and rear ends as shock absorbers 5, respectively. A pair of rubber rings 5b protected by bodies 5a, 5a are fitted onto the supporting member 2 and placed in a slightly compressed state on the left and right sides.

Reference numeral 6 designates a pin that is integrated with the guard member 1 and is used to prevent the support body 2, on which the rubber rings 5b serving as the shock absorber 5 are fitted on the left and right sides, from coming off from the holder 4. .

According to the shock absorbing bumper of the present invention constructed as described above, the guard member 1 is supported by the supporting members 2, 2 which are movable in the front and rear directions, and the holder 4
Since the shock absorber 5 is arranged between the guard member 1 and the guard member 1, the impact at the time of a collision is caused by the movement of the guard member 1 in the front and back direction together with the supporting members 2, 2 that support it, and the shock absorber 5. is absorbed by the deformation, and the impact transmitted to the vehicle body frame 3 is buffered.

Further, since the shock absorbing bumper has a structure in which it is supported at two places in the front and back directions with respect to the vehicle body 10, specifically, the guard member 1 is on the proximal end side of the supporting members 2, 2 that support it. Since it has a structure in which it is supported at two places in the front and back directions, the part and the middle part, the shock absorbing bumper has a structure that can withstand sufficient strength even if the guard member 1 is suspended and the vehicle body 10 is lifted. .

[Another example]

In the above-described embodiment, the case where the shock absorbing bumper is attached to the front part of the vehicle body frame 3 has been described, but the present invention can also be applied to the case where it is attached to the rear part of the vehicle body frame 3.

Furthermore, in the above-described embodiment, the shock absorber 5 has rubber ring bodies 5b arranged on the left and right sides, but spring bodies may be arranged on the left and right sides, and the rubber rings 5b on the left and right sides may be arranged. 5b, a spring body, etc. may be integrated.

[Brief explanation of drawings]

1 and 2 show an embodiment of the shock absorbing bumper for a working vehicle according to the present invention, FIG. 1 is a partially sectional plan view showing the main parts thereof, and FIG. 2 is an overall side view of the working vehicle. . FIG. 3 is a partially sectional plan view of a conventional bumper. DESCRIPTION OF SYMBOLS 1... Guard member, 2... Support material, 3... Vehicle body frame, 4... Holder, 4b, 4c... Support stay, 5... Shock absorber.

Claims (1)

[Scope of utility model registration request] This is a shock-absorbing bumper for a working vehicle constructed by attaching a guard member 1 to a vehicle body frame 3, in which U-shaped curved portions are provided at both ends of the guard member 1, and a base portion is attached to the vehicle body frame 3. The base side of the curved part of the guard member 1 is connected to the tip of a pair of left and right rod-shaped supporting members 2, 2 that are supported on the sides, and both of the supporting members 2, 2
The ends of the curved portions of the guard member 1 are connected to the intermediate portions in the longitudinal direction of the guard member 1, and the supporting members 2, 2 are connected to the intermediate portions of the guard member 1 in the longitudinal direction. Support stays 4b and 4c protrude from a holder 4 connected to the vehicle body frame 3 on both front and rear sides sandwiching the connection point with the end portion, and are inserted and supported so as to be movable back and forth, and the holder 4 and the guard member 1. A shock absorbing bumper for a work vehicle, characterized in that a shock absorber 5 is disposed between the bumper and the bumper.