JPH0130689Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an improvement of a floating seal that is mainly used as an external seal around the suspension of a civil engineering construction machine, such as a caterpillar or an idler wheel.

[Conventional technology]

Conventionally, this type of floating seal
As shown in FIG. 3, a non-rotating slide is supported in a floating state via an elastic ring 5 made of a rubber material on the inner circumferential step 4 of a collar 3 fixed to the fuselage (not shown). An elastic ring 9 made of a rubber material is connected to the inner circumferential step 8 of the roller 7 which is rotatably fitted to the moving ring 1 and the shaft 2 protruding from the machine body via a bearing (not shown). The sliding rings 6 that are supported and rotate in a floating state slide closely against each other on their opposing sliding surfaces 1' and 6', and muddy water or the like that enters from the gap 10 between the collar 3 and the roller 7 is removed from the bearing. There are known devices that prevent the intrusion into parts, etc.
The elastic rings 5 and 9 maintain airtightness between the collar 3 and the sliding ring 1, and between the roller 7 and the sliding ring 6, respectively, and also maintain airtightness between the collar 3 and the sliding ring 1 and between the roller 7 and the sliding ring 6, respectively. A load necessary for sealing between the dynamic surfaces 1' and 6' is applied.

[Problem that the invention attempts to solve]

However, in the above-mentioned conventional structure, since the sliding rings 1, 6 and the elastic rings 5, 9 are separate bodies, there are a large number of parts, and assembly work and parts management before assembly are complicated.

In view of these circumstances, the present invention aims to provide a floating seal that reduces the number of parts and exhibits good sealing performance.

[Means for solving problems]

As a means to achieve this objective, the floating seal according to the present invention has an elastic ring made of an elastic material such as rubber or urethane integrally baked and bonded to a part of the outer circumferential surface of each sliding ring that is slightly biased toward the rear. It was designed to have a structure.

[Effect]

According to the above configuration, the elastic ring located at a portion slightly rearward on the outer peripheral surface of the sliding ring in a free state is appropriately rolled forward and compressed when installed, and the elastic ring and the sliding ring are integrally formed. Therefore, the number of parts is reduced.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

In the figure, reference numeral 12 is a non-rotating shaft protruding from the fuselage body (not shown), 13 is a collar fixed to the fuselage body, and 19 is a rotatable shaft connected to the shaft 12 via a bearing (not shown). This is an extrapolated roller. 1
1 and 18 are each manufactured by press forming metal plates, and are supported in a floating state inside the inner circumferential step 14 of the collar 13 and inside the inner circumferential step 20 of the roller 19 opposing this. Sliding rings 15 and 21 are sliding rings 1 that closely slide against each other.
This is an elastic ring made of a rubber material that is in a compressed state between the sliding rings 1, 18 and the inner circumferential stepped portions 14, 20, seals the portions, and elastically biases the sliding rings 11, 18. Each elastic ring 15, 21 connects to the tapered outer peripheral surface 11a, 18 of each sliding ring 11, 18 via a rubber film 16, 22 integrally molded therewith.
a, and the rubber films 16, 22
A part of the sliding surfaces 11b, 18 of the sliding rings 11, 18
Dust strips 17 and 23 are formed which extend outwardly from b and whose ends are in close contact with the end faces of the collar 13 and the roller 19 and which slide closely against each other. In the free state, the elastic rings 15, 21 are located slightly rearward (opposite the sliding surfaces 11b, 18b) with respect to the sliding rings 11, 18, as shown in FIG. In some cases, as shown in FIG.
Due to the relative load from 8, it is appropriately rolled forward (towards the sliding surfaces 11b and 18b) and compressed.

According to the present embodiment, as described above, since the sliding rings 11, 18 and the elastic rings 15, 21 are integrated, the number of parts is not only reduced compared to the conventional structure, but also the dust strips 17, 23 are integrated. Since a rough seal is preliminarily performed by this method, and there is no possibility of leakage from the joints between the elastic rings 15, 21 and the sliding rings 11, 18, the sealing performance is greatly improved.

[Effect of idea]

As is clear from the above explanation, the floating seal of the present invention has the sliding ring and the elastic ring integrally baked and bonded, which reduces the number of parts, lowers costs, and greatly improves sealing performance. It has excellent practical effects.

[Brief explanation of the drawing]

Fig. 1 is a half-cut sectional view of an embodiment of the present invention in the installed state; Fig. 2 is a half-cut sectional view of the main part;
The figure is a half-cut sectional view of a conventional structure in an installed state. 11, 18...Sliding ring, 11a, 18a...Outer peripheral surface, 11b, 18b...Sliding surface, 12...Shaft,
13... Collar, 14, 20... Inner peripheral step, 1
5, 21...Elastic ring, 16, 22...Rubber membrane, 17, 23...Dust strip, 19...Roller.

Claims (1)

[Scope of utility model registration request] It is loosely fitted onto the shaft and floating airtightly and elastically through elastic rings made of elastic material such as rubber or urethane on the opposing inner circumferential steps formed on the rotating and non-rotating side members. In the floating seal, in which a pair of sliding rings supported in the above-mentioned state closely slide against each other, the elastic ring is integrally baked and bonded to a portion of the outer circumferential surface of the sliding ring that is slightly biased toward the rear. A floating seal that is characterized by: