JPS6033175Y2 - bucket shock absorber - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a packet impact mitigation device for a work vehicle equipped with a swinging packet.

When excavating with a power shovel or sawmill, the packet is used in a swing-driven manner.

When the packet moves at its maximum angle, for example in a raised or dive position, the bottom of the packet collides with the boom or stick supporting the packet.

As the steel materials collide with each other, large vibrations are transmitted to the cargo handling equipment and the vehicle body, and large impact noises are generated, causing discomfort to workers and causing problems in the equipment and vehicle body.

This invention was made in view of the above-mentioned circumstances, and provides a packet shock mitigation device that softens the collision between the packet and its supporting member, reduces the generated noise, and reduces vibration.

Hereinafter, embodiments of this invention will be described in detail based on the drawings.

In FIG. 1, a packet 1 is pivotably attached to the tip of a boom 2 via a shaft 3. As shown in FIG.

The packet 1 is swing-driven by a drive device such as a packet cylinder (not shown) from a raised position shown by a solid line to a dumped position shown by a chain line.

A stopper 4A is located at a suitable position where the packet 1 and the boom 2 collide in the attitude of the maximum swing angle.

4B is provided.

In this embodiment, one stopper 4A is attached to the bottom of the packet 1 by a mounting member 14, and the other stopper 4B is attached to the bottom of the packet 1. attached to the mounting member 16 provided between the cross members 18 of the boom 2 at the tip of the boom 2,
Receiving members 5A, 5B are fixed to the boom 2 and the packet 1, respectively, by attachment members 17.15 at locations that face and abut the stoppers 4A, 4B.

These stoppers and receiving members may be attached to either side of the packet 1 or the boom 2 as long as they come into contact with each other.

As shown enlarged in FIGS. 2 and 3, the stopper (represented by 4A) is attached to the mounting member 14 (or 1
6) and a screw 1 on this mounting base 6.
The elastic member 7 that is attached to the old one, the protector 8 that surrounds the elastic member 7 with a slight gap and is fixed on the mount 6, and the protector 8 that is interposed between the mount 6 and the elastic member 7. It is made up of a spacer 9.

The elastic member 7 is made of, for example, hard urethane rubber.

Hard urethane rubber is very preferable because it does not break even when subjected to impact.

Other members, such as the mounting base 6, protector 8, spacer 9, and receiving members 5A and 5B, are made of steel.

The elastic member 7 protrudes slightly from the protector 8.

This amount of protrusion is adjusted by the spacer 9.

In the drawings, the elastic member 7 and the protector 8 are formed in a circular shape, but they may have any shape such as a rectangular shape.

When Packet 1 assumes the upright and dumping positions with maximum angular swing, Packet 1 itself moves toward Boom 2.
The stoppers 4A, 4B do not directly collide with the receiving member 5A,
It falls under 5B.

Since the stoppers 4A and 4B are provided with the elastic member 7, the impact is softened, and the generated noise and vibration are reduced.

Moreover, since the elastic member 7 is surrounded by a protector 8, the elastic member 7 is prevented from being crushed and bulging out in the lateral direction when it collides with the receiving members 5A, 5B.

Therefore, the elastic member 7 can withstand use for a long time.

As described in detail above, according to this invention, the impact generated when the packet swings at its maximum angle and hits the support member is softened, the generated noise is reduced, and vibrations are also damped.

Therefore, the operator will not feel uncomfortable, and failures due to vibrations of the cargo handling device or the vehicle body will not occur.

[Brief explanation of the drawing]

Figure 1 is a sectional view showing the packet and boom, Figure 2 is an enlarged sectional view showing details of the stopper, and Figure 3 is the
It is a cross-sectional view along the -■ line. 1...Packet, 2...Boom, 4A
, 4B...stopper, 7...elastic member, 8...protector.

Claims (1)

[Scope of utility model registration request] In a work vehicle equipped with a swinging packet, the packet and the support member collide when the packet swings to a maximum angle of at least one of the packet and the support member that pivotally supports the packet. A shock absorbing device for a packet, in which a stopper is provided at a location, the stopper is composed of an elastic member and a protector surrounding the elastic member, and the elastic member protrudes beyond the protector.