JPH04101021U - Sealing device for rolling bearings - Google Patents

Abstract

(57) [Summary] [Objective] To obtain a sealing device for a rolling bearing having a seal with a simple structure in which a rolling bearing having a structure in which an outer ring or an inner ring is separated does not separate from each other during handling such as transportation. [Structure] A pair of metal rings 4 having a U-shaped cross section are fitted to both ends of one of the inner and outer bearing rings with the annular wall surface 17 facing inward of the bearing, and the other metal ring 4 facing the ring is fitted onto both ends of one of the inner and outer bearing rings. A pair of seal members 3 having an L-shaped cross section are fitted onto the bearing ring, and radial lips 12 and 13 are attached to the tip 10 of the seal.
is brought into contact with the cylindrical portion of the metal ring 4, and the lip 16 extending in the axial direction is brought into contact with the annular wall surface 17 of the metal ring,
The gap δ between the edge 19 of the metal ring and the sealing member having an L-shaped cross section is maintained at a predetermined distance to prevent separation of internal and external imports. [Effect] Separation of the track can be reliably prevented without impairing the sealing performance of the seal, without requiring any special processing on the seal components or the raceway ring.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea is achieved by mounting the bearing on a bearing that has a structure where the outer ring or inner ring can be separated. The inner or outer ring will not separate during normal handling such as transportation, installation, and removal. This invention relates to a sealing device for a rolling bearing with an added structure.

0002

[Conventional technology]

For bearings with this type of separation structure, various considerations are needed to prevent separation during transportation, etc. A plan is being made. for example,. What is disclosed in Utility Model Application Publication No. 2-66721 This method uses a seal to prevent separation, and the bearing ring to prevent separation is It has a circumferential groove to prevent separation. ．． Publication of Utility Model Publication No. 16864/1999 The one disclosed in the report also uses a seal to prevent separation; A relatively deep stepped part is provided on the raceway ring to prevent the problem. The one described in Utility Model Application Publication No. 2-16864 combines two seal members. This is to prevent the seal assembly itself from separating. A groove is provided in a spiral manner, and the other seal lip is in sliding contact with this circumferential groove.

0003

[Problem that the idea aims to solve]

However, in the case of using a seal to prevent separation as described above, a circumferential groove is provided on the bearing ring. However, due to its structure, it is impossible to increase the separation prevention load. In some cases, it is necessary to process a relatively deep stepped part on the raceway ring, and the The end face of the raceway ring at the stepped part becomes smaller and there is a problem in terms of rigidity. Because the core metal is pressed from a relatively thin steel plate, the circumferential groove is inevitably shallow. Although it is possible to prevent the seal assembly from separating, it is not possible to prevent the bearing ring from separating. There are other problems.

0004

[Means to solve the problem]

This idea consists of an outer raceway and an inner raceway arranged through a large number of rolling elements. There are metal rings with a U-shaped cross section on the circumference of both ends of one raceway opposite the other raceway. with its bottom facing inside the bearing, and attach it to the circumferential surface of both ends of the other bearing ring. A sealing member having a substantially L-shaped cross section is fitted, and the tip of the sealing member has the above-mentioned U-shaped cross section. A lip that extends in the radial direction and is fixed to the tip of the U-shaped space of the metal ring. is brought into contact with one cylindrical portion of the metal ring having a U-shaped cross section, and extends in the axial direction. Similarly, touch the lip to the bottom of the U-shaped metal ring, and then touch the other edge of the U-shaped metal ring. A rolling device characterized by a seal with an approximately L-shaped cross section and a position with a slight gap δ. A bearing sealing device that is extremely easy to manufacture and that allows the gap δ to be set to an appropriate value. This ensures sufficient sealing performance.

[0005]

[Effect]

[0006] The substantially axial lip 16 attached to the tip of the sealing member 3 is a gold plate with a U-shaped cross section. Contacting the annular wall surface 17 of the metal ring 4 and sealing with the edge 19 of the outer cylindrical portion 18 of the metal ring 4 Since an appropriate distance δ is provided from the base 15 of the member 3, the inner ring cannot move by more than δ. This prevents the bearing from separating, and at the same time prevents the lip 16 from becoming unnecessarily deformed. The sealing performance is ensured.

[0007]

【Example】

Next, an embodiment of this invention will be described based on the drawings. Figure 1 shows both end faces. An example of a double-row angular contact ball bearing incorporating a sealing device S according to this invention, In order to show the details of the sealing device according to this invention, one side thereof is shown enlarged in FIG. Two rows of raceways 5a and 5b are formed on the inner peripheral surface of the outer ring 1. On the other hand, the outer ring two inner rings 2a, 2 in which raceways 6a, 6b are formed corresponding to the respective raceways 5a, 5b; b, and the balls 7 incorporated in the inner and outer ring raceways 5a, 5b and 6a, 6b. This constitutes an outward angular contact ball bearing in which the intersection of the lines of action L lies outside the pitch circle. Na Also, 8 is a holder that equally distributes the balls on the track in each ball row.

[0008] An embodiment of this invention is shown in FIG. The inner cylindrical portion 14 of the outer ring 4 is fitted. Correspondingly, it is formed on the inner peripheral edge of outer ring 1. The base portion 15 of the metal sealing member 3 having an L-shaped cross section is fitted onto the cylindrical surface portion 9, The base portion 15 and the outer cylindrical portion 18 of the metal ring 4 face each other with a certain gap α. ing. The tip 10 of the sealing member 3 is connected to the U-shaped space 1 of the U-shaped metal sealing member 4. 1 and an inner lip 12 extending radially inwardly from the tip; The lip 13 is in sliding contact with the outer periphery of the cylindrical portion 14 on the side fitted to the inner ring 2 of the seal member 4. ing. Furthermore, an axial lip extends substantially axially from the tip 10 of the seal member 3. A lip 16 is formed, the lip contacts the annular wall surface 17 of the metal ring 4, and the lip A predetermined axial gap between the end edge 19 of the outer cylindrical portion 18 of the outer ring 4 and the seal member 3 δ is maintained.

[0009] Furthermore, if necessary, as shown in FIG. The outer cylindrical portion 18 of 4 is fitted, and a metal seal portion with an L-shaped cross section is attached to the outer peripheral edge of the inner ring 2. The base 15 of the material 3 can also be fitted. Note that parts equivalent to those in Figure 2 are designated by the same reference numerals. Attached.

0010

[Effect of the idea]

The sealing device for a rolling bearing according to this invention has one bearing ring attached to the other bearing ring. A metal ring with a U-shaped cross section is placed on the circumferential surface of both ends facing toward each other, with the annular wall surface facing inside the bearing. and a seal member having a substantially L-shaped cross section is fitted to the circumferential surface of both ends of the other bearing ring. the tip of the sealing member facing the U-shaped space of the metal ring having a U-shaped cross section; A radially extending lip fixed to the tip is attached to one side of the metal ring having a U-shaped cross section. In addition to contacting the cylindrical part, the lip extending in the axial direction is also connected to the annular U-shaped metal ring. Place the other edge of the U-shaped metal ring in contact with the wall surface, with a slight gap between the seal and the approximately L-shaped cross-section. Since they are positioned with a gap δ, the parts that make up the seal are different from conventional products. It can be manufactured without any special processing on the product or bearing ring, and is extremely easy to manufacture. . Furthermore, it is possible to reliably prevent separation of the bearing rings. Also, the direction toward the inside of the bearing is Because it has a metal ring with a U-shaped cross section, it is possible to restrict the amount of mutual movement between the two members. Since damage can be further prevented, sufficient sealing performance can be ensured.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional side view of a half of an angular contact ball bearing having a sealing device according to the present invention.

FIG. 2 is a partially enlarged cross-sectional view showing the main parts of this invention.

FIG. 3 is a partially enlarged sectional view showing the main parts of another embodiment of the invention. 1 Outer ring 2 (2a, 2b) Inner ring 3 Seal member 4 Metal ring 5 (5a, 5b) Raceway 6 (6a, 6b) Raceway 7 Rolling element (ball) 10 Tip of seal member 11 U-shaped space 12 Inner lip 13 Outer lip Lip 16 Axial lip 17 Annular wall surface 19 Edge

Claims (1)

[Scope of utility model registration request] Claim 1: Consisting of an outer bearing ring and an inner bearing ring arranged through a number of rolling elements, one bearing ring has a metal ring having a U-shaped cross section on the circumferential surface of both ends opposite to the other bearing ring. The ring is fitted with the annular wall surface facing inside the bearing, and a seal member having a substantially L-shaped cross section is fitted to the circumferential surface of both ends of the other bearing ring, and the tip of the seal member is shaped like the U-shaped cross section described above. The radially extending lip fixed to the tip thereof is brought into contact with one cylindrical portion of the metal ring having a U-shaped cross section, and the axially extending lip is also facing the U-shaped space of the metal ring. A sealing device for a rolling bearing, characterized in that the other edge of the U-shaped metal ring is placed in contact with the bottom of the metal ring with a slight gap δ from a seal having an approximately L-shaped cross section.