JPH04300423A - Seal with stop ring - Google Patents

Abstract

PURPOSE:To furnish easily a seal with a stop ring at an outer ring peripheral groove without requiring a special means and at the same time realize the increase of a sealing function and in addition realize high precision lip portion forming and at the same time conduct firm fixing at the outer ring peripheral groove in cooperation with elastic members as the cross section passage of an annular body together with plural projections that are formed at the outer periphery of the annular body, is formed into a doglegged shape. CONSTITUTION:Plural projections 102 are formed around an annular body 101 having no cutout, and at the same time a peripheral wall is formed integrally at a seal portion and a stop ring side wall by means of a plastic material 200 in a stop ring 100 radial direction.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seal with a retaining ring that is fitted onto both ends of a slide bearing or the like in which a ball or roller endlessly circulates between a loaded portion and a non-loaded portion of the shaft.

0002

[Prior Art] In order to prevent grease from leaking inside a slide bearing and to prevent dust from entering from the outside, a seal is formed by vulcanizing a rubber material 2 onto a retaining ring 1 having a notch as shown in Fig. 4. Plate 3 is used.

0003

However, when manufacturing the seal plate 3, a retaining ring 1 having a notch is placed in a mold (not shown), and a predetermined amount of rubber material is placed on the surface of the retaining ring 1. When the seal plate 3 is vulcanized and molded after setting, the rubber material 2 is filled between both end surfaces 4.5 of the notch of the retaining ring 1 as shown in FIG. Depending on the means for fitting the inner lip 8 and the outer lip 9 into the circumferential groove 7 of the seal plate 6, the inner lip 8 and the outer lip 9 may be slightly deformed, resulting in a defect that impairs the sealing function of the seal plate.

Furthermore, when the seal plate is fitted into the circumferential groove 7, since the side wall 11 of the retaining ring 1 is a flat surface,
It merely contacts the end face of the retainer 10.

Furthermore, even when a rubber material is set in the retaining ring 1 having a notch, since the rubber material is relatively thin, the rubber material may break at both end surfaces of the notch.
There are also problems in terms of manufacturing and processing technology in order to achieve the shape and dimensions of the lip portion that require high precision.

Therefore, the seal with a retaining ring can be easily fitted into the circumferential groove of the outer ring without requiring any special means, and at the same time, the lip portion of the seal with a retaining ring will not be deformed after fitting. It is a technical object of the present invention to improve the sealing function and to enable highly accurate molding of the lip portion.

[0007]

[Means for Solving the Problems] The means (constituent elements) of the present invention for solving the above technical problems are as follows. That is, a seal portion is formed of a plastic material in the radial direction of a retaining ring in which a plurality of protrusions are formed on the outer periphery of an annular body having no notches, and a peripheral wall is formed on the side wall of the retaining ring integrally with the seal portion. An object of the present invention is to provide a seal with a retaining ring, which is characterized in that it is formed with a retaining ring.

[0008]

[Operation] Since a sealing portion is formed with plastic material on the retaining ring, which has a plurality of protrusions formed on the outer periphery of the ring body without notches, the plastic material is uniformly molded on the ring body and the sealing portion is formed at the same time. The inner lip and the outer lip can be formed with high accuracy since the inner lip and the outer lip can be molded in just the right amount.

[0009] Furthermore, since the annular body is formed in a generally dogleg shape in cross section, after being fitted onto the outer ring, the outer circumferential protrusion of the annular body abuts against the outer step of the circumferential groove of the outer ring, and the ring body The letter-shaped side protrusion is in contact with the end surface of the cage and is pressed inward.

0010

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. The seal with a retaining ring of the present invention is composed of a retaining ring 100 and a plastic material 200.

[0011] The retaining ring 100 has a ring body 1 having no notch.
01, and a plurality of protrusions 102, 102... are integrally formed on the outer periphery at required intervals, and the ring body 1
01 has a substantially doglegged cross section.

The protrusion 102 of the ring body 101 abuts against the outer step 3021 of the circumferential groove 302 of the outer ring 300, and the ring body 101
The upper and lower side convex portions 1011 and 1012 having a substantially doglegged cross section contact the end surface 401 of the retainer 400 and simultaneously press it inward.

[0013] Also, the protrusion 102.102. ．． ．． The outer peripheral surface 104 has a curved surface having the same radius as the ring body 101.

200 represents the entire plastic material such as a rubber material or a synthetic resin material. The plastic material 200 is attached to the outer wall 103 of the retaining ring 100 with a peripheral wall 201 and the plurality of projections 102.102. ．． ．． The bulge between 202.202
．． ．． ．． Further, a seal portion consisting of an inner lip 203 and an outer lip 204 is integrally vulcanized or injection molded on the radially inward side of the retaining ring 100.

Reference numeral 205 is a constriction formed between the peripheral wall 201 and the seal portion. Reference numeral 206 denotes an end face of the bulging portion 202, which is in close contact with the inner circumferential stepped portion 301 of the outer ring 300, thereby preventing grease from leaking from within the bearing.

Reference numeral 302 denotes a circumferential groove formed at both ends of the outer ring 300 of a slide bearing, for example, and the annular body 101 having a substantially doglegged cross section and the projection 102 are firmly fitted and fixed in the circumferential groove 302 by utilizing elastic deformation. can do.

In the embodiment of the present invention having the above configuration, a part of the projection 102 of the retaining ring is located in the circumferential groove 30 of the outer ring 300.
At the same time, the outer circumferential surface of the bulged portion 202 comes into close contact with the stepped portion 301 of the outer ring 300, thereby further exerting its sealing function.

Furthermore, since the peripheral wall 201 is formed of the plastic material evenly along the annular body of the retaining ring, and at the same time, the seal portion is formed in the radial direction of the retaining ring in just the right amount.
The sealing function of the sealing part can achieve the desired effect.

[0019]

Effects of the Invention The seal with retaining ring of the present invention has protrusions formed at required intervals on the outer periphery of the annular body without notches, and the annular body has a substantially doglegged cross section. The deformation makes it easier to fit the outer ring into the circumferential groove, and when plastic material is vulcanized or injection molded, the plastic material becomes uniform along the outer wall of the ring body and at the same time This has the advantage that there is no shortage of material for the seal portion formed in the radial direction.

Furthermore, since the seal with a retaining ring is formed with a plurality of protrusions that are inclined outward from the annular body, the protrusions abut against the outer step of the circumferential groove of the outer ring, and at the same time, the seal has a substantially dogleg-shaped cross section. The seal with a retaining ring can be firmly fitted and fixed by pressing the retainer inward at the same time when the side convex portion of the body contacts the end surface of the retainer.

[0021] Further, the bulge formed between the protrusions can prevent the grease in the bearing from leaking, and this, in combination with the sealing part, can further enhance the sealing function with the retaining ring, which is unique to the present invention. It is possible to achieve the following effects.

[Brief explanation of the drawing]

FIG. 1 is an enlarged back view of a seal with a retaining ring of the present invention.

FIG. 2 is a half-cut vertical front view showing a state in which the seal with a retaining ring of the present invention is mounted on a slide bearing.

FIG. 3 is an enlarged longitudinal sectional front view of the main part of FIG. 2;

FIG. 4 is an enlarged longitudinal sectional front view of the main part showing a conventional example.

FIG. 5 is an enlarged back view of a conventional seal plate.

[Explanation of symbols]

100: Retaining ring 101: Ring body 102:Protrusion 200: Plastic material 201: Peripheral wall 203: Inner lip 204: Outer lip

Claims (2)

[Claims] 1. A retaining ring in which a plurality of protrusions are formed on the outer periphery of an annular body having no notches, a sealing portion made of a plastic material is formed in the radial direction of the retaining ring, and a side wall of the retaining ring is integrally formed with the sealing portion. A seal with a retaining ring that is characterized by a peripheral wall formed in a circular manner. 2. The retaining ring is integrally formed with an annular body having no notches and a plurality of protrusions spaced at required intervals on the outer periphery of the annular body, and the shape of the annular body is omitted in cross section. The seal with a retaining ring according to claim 1, characterized in that it has a letter shape.