JPH0225925Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a device for preventing the connecting pins from falling off for use in hydraulic excavators and the like.

[Conventional technology]

As the work performed on hydraulic excavators becomes more diverse, work attachments such as bucket belts often need to be replaced frequently.However, the conventional bucket support pin 1 retaining device uses bolts and nuts as shown in Figure 3. A connecting pin 5 and a steel ring 6 as shown in FIG. 4 were used. However, the former method requires tightening and loosening bolts and nuts, which takes time and effort, while the latter method requires increased rigidity of the ring to prevent it from coming off or breaking, making it difficult to handle. There was a drawback that allowed infiltration.

[Problem that the invention attempts to solve]

The purpose of the present invention is to eliminate the above-mentioned drawbacks, to enable the connecting pin 5 of the support pin 1 of a bucket, etc. to be attached and detached with a single touch, to improve maintainability, and to prevent the infiltration of earth, sand, water, etc. into the connecting pin part. To provide a locking device.

[Means and actions for solving problems]

The pin slipping prevention device according to the present invention includes an elastic ring made of rubber or the like to prevent the first and second structure connecting pins 5 from slipping off, and further includes a ring made of elastic material such as rubber to prevent the infiltration of earth, sand, water, etc. It is designed to achieve the above objective by providing sealing properties.

〔Example〕

In FIG. 1, 5 is a pin that connects and supports the first structure 1 and the second structure 2, and 7 is a ring that prevents the connecting pin from coming off. This ring may be a simple rubber ring like 7, or it may be shaped like 7' as shown in FIG.

Next, the operation of the above embodiment will be explained.

As shown in FIG. 1, a ring 7 prevents the pin 5 from coming off. This ring 7 is highly elastic, and when replacing an attachment such as a construction machine (not shown), the connecting pin 5 can be removed very easily by shifting the ring 7 and resting the boss portion. In addition, the shapes of the ring 7 and the boss may be modified, for example, as shown in Figure 1, the cross-sectional shape of the ring 7 is circular, and the mounting surface is tapered, or as shown in Figure 2, the ring 7' and this ring It is also possible to prevent the infiltration of foreign substances such as earth and water from the outside by making the surface to which it is attached to have a tapered surface with a similar value so that it adheres well, and by applying appropriate tension to provide sealing properties. .

[Effect of idea]

As mentioned above, the pin retaining device of the present invention is
In a device that has a pin that connects and supports the first and second structures, a special elastic ring made of rubber or the like is provided to prevent the pin from coming off and to seal against the infiltration of earth, sand, water, etc. It has the feature that the retaining pin can be attached and detached very easily without the use of tools, and that sealing properties can be provided as needed.

[Brief explanation of the drawing]

Figures 1 and 2 are sectional views of main parts showing embodiments of the present invention. Figure 1 is the first embodiment, Figure 2 is the second embodiment,
3 and 4 are sectional views of main parts showing conventional examples, in which FIG. 3 is a first conventional example, FIG. 4 is a second conventional example, and FIG. 5 is a detailed view of the ring 6. 1...First structure, 2...Second structure, 5
...Pin, 7,7'...Ring.

Claims (1)

[Scope of utility model registration request] A device having a pin for connecting and supporting a first structure and a second structure, which is provided with an elastic ring made of rubber or the like to prevent the pin from coming off and to seal against infiltration of earth, sand, water, etc. A pin retaining device featuring: