JPS6344575Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a sealed rolling bearing, and more specifically, the seal body that seals the bearing has two shield plates and an elastic body sandwiched between the two shield plates. The present invention relates to an improvement in a fixing structure that includes a seal plate and fixes the seal body to an outer ring (or inner ring) via a retaining ring.

An example of a conventionally known sealed rolling bearing having a seal body of this type is Japanese Utility Model Application Publication No. 114326/1983, filed by the applicant of this invention. The fixing of the seal body in this invention is, for example, as shown in FIG.
The seal body 4a, which is made of an elastic seal plate 3a sandwiched between the outer ring 2a and the elastic seal plate 3a, elastically fits into a V-shaped groove 6a formed following the circumferential step 5a while being attached to the circumferential step 5a at the end of the outer ring. It has a structure in which it is held down and fixed in the axial direction by the attached retaining ring 7a.

That is, the seal body 4 in the above conventional structure
Since a has a structure that is fixed only by the retaining ring 7a, for example, when the bearing is in use and the outside of the bearing is a pressure chamber, the sealing body 4a There was a risk that the retaining ring 7a would come off and the seal body 4a would come off.

This invention is based on the idea that, in order to ensure that the seal body can be used safely without coming off even under the above-mentioned operating conditions, the outer circumferential edge of the outer shield plate that constitutes the seal body is provided with a A tongue-shaped rising piece is provided that faces radially inward from the outer circumferential edge and is formed by cutting wider than the width of the seal body within a range that does not inhibit the attachment of the retaining ring, and the rising piece is attached to the outer surface of the retaining ring. crimped to engage the retaining ring,
This is intended to improve the fixing force of the seal body by preventing the retaining ring from coming off.

Next, this invention will be explained with reference to an embodiment shown in FIGS. 2 to 4. 1 is an outer ring, 2 is an inner ring,
3 is a rolling element, 4 is a sealing body, and 5 is an elastic retaining ring with an end.

The outer ring 1 is formed with a circumferential stepped portion 11 and a fixing groove 13 for the seal body 4, which is formed by a V-shaped groove 12 following the circumferential stepped portion 11 on the inner peripheral surface of the end portion.

The seal body 4 is formed of an inner shield plate 41, an outer shield plate 42, and an elastic seal plate 43 made of rubber, synthetic resin, etc. sandwiched between the shield plates 41, 42. As shown in FIGS. 3 and 4, the outer shield plate 42 has three locations on the outer peripheral edge on the fixed side.
A rising piece 421 is formed which faces radially inward from the outer circumferential edge 422 of the outer circumferential edge portion and is cut into a width larger than the width of the retaining ring 5 within a range that does not hinder the attachment of the retaining ring 5. has been done.

As shown in FIG. 2, the seal body 4 formed in this way is attached to the circumferential step 11 of the fixing groove 13 of the outer ring, and then the retaining ring 5 is snapped into the V-shaped groove and temporarily attached. It is fixed in the fixing groove 13. Then, the rising piece 421 of the outer shield plate 12 is further tightened toward the retaining ring 5, and the retaining ring is finally fixed in a state where it is prevented from loosening. In this state, the inner peripheral edges of the shield plates 11 and 12 of the seal body 4 are opposed to the outer peripheral surface of the inner ring with a slight seal gap, and the elastic seal plate is in contact with the outer peripheral surface of the inner ring. This design results in a sealed rolling bearing.

As described above, in the sealed rolling bearing of this invention, the outer shield plate 42 forming the seal body 4 has a plurality of rising pieces 421 on its outer peripheral edge. Since the rising piece 421 tightens the retaining ring 5 and reliably prevents the retaining ring 5 from coming off the V-shaped groove, even if the seal body 4 is pushed during use of the bearing, The retaining ring 5 does not fall out of the V-shaped groove, and can always be accurately and firmly fixed.

It goes without saying that the bearing type, the detailed structure of the seal body, etc. are not limited to the embodiments, but may be modified as appropriate within the scope of the claims for utility model registration.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the main parts of a conventional sealed rolling bearing, Fig. 2 is a view equivalent to Fig. 1 showing the sealed rolling bearing of this invention, and Fig. 3 is the outer side of the seal body shown in Fig. 2. A plan view of the shield plate, and FIG. 4 is a sectional view of a main part of the outer shield plate shown in FIG. 3. In the embodiment, 1 is an outer ring, 2 is an inner ring, 3 is a rolling element, 4 is a sealing body, 42 is an outer shield plate, 42
1 is a rising piece, and 5 is a retaining ring.

Claims (1)

[Scope of utility model registration request] On the inner circumferential surface of the end of the outer ring, there is a fixing groove 13 for the seal body, which consists of a circumferential step 11 and a V-shaped groove 12 following the circumferential step 11.
The seal body 4 includes an elastic seal plate 43 sandwiched between an inner shield plate 41 and an outer shield plate 42, and the outer peripheral edge of the seal body 4 is attached to the circumferential step portion 11, and In the sealed rolling bearing which is fixed to the fixing groove 13 via the retaining ring 5 which is fixed to the V-shaped groove to form a sealed part between the inner circumferential edge and the inner ring, the outer shield plate 42 is , a plurality of tongue-like rising pieces 421 are formed on the outer circumferential edge by cutting radially inward from the outer circumferential edge of the outer circumferential edge, and the rising pieces 421 are connected to the stopper. A sealed rolling bearing that is crimped on the ring 5 side.