JPH04122471U - Integrated oil seal fitting - Google Patents

Abstract

(57) [Summary] [Purpose] To accurately determine the relative position of the inner and outer rings of an integrated oil seal and install it in the sealing part. [Structure] A recess is formed in the fitting body to hold the inner and outer rings of the integrated oil seal. Push it out in the direction and attach it to the sealed part.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention is an installation method for attaching an integrated oil seal to a sealed part such as between the shaft and the machine body. It concerns attachments.

0002

[Conventional technology]

Japanese Utility Model Application Publication No. 59-116179 discloses that the inside and outside directions of the oil seal are correct. An oil seal installation jig used to fit the housing is described. In this case, the oil seal is of the normal type in which the tongue of the oil seal directly contacts the shaft. It is something.

0003 As shown in Figure 2, the oil seal has an oil seal 3 attached to the reinforcing outer ring 1. and make the tip 3a of the tongue come into contact with the inner ring 2 attached to the shaft 4 to seal it. There is a type with the shaft and oil seal integrated. This type of format The oil seal will be referred to herein as an integrated oil seal. As shown in Fig. 2A, the integral oil seal has an inner tip 3a. An axial type that contacts the ring 2 in the axial direction, and an oil seal as shown in Figure 2B. There is a radial type in which the tips 3b of the tongues contact the inner ring 2 in the radial direction.

0004

[Problem that the idea aims to solve]

In the integrated oil seal, the relative position of the outer ring 1 and the inner ring 2 in the axial direction is constant. must be installed in the sealed part. In particular, the axial type integrated oil seal Now, let's take a look at the variation in the tightness of the tongue pieces of the oil seal, that is, the difference between the outer ring 1 and the inner ring 2. Variations in relative axial position directly affect sealing performance. For this reason, conventional axes As shown in Fig. 2A, the oil seal has an overhang 1a on the outside of the outer ring 1. This positioning is performed when the housing 5 is mounted on the housing 5.

[0005] The present invention eliminates the need to provide a positioning protrusion on the outer ring of the integrated oil seal. This design allows accurate positioning of the inner and outer rings using a regular integrated oil seal. The purpose is to provide accessories.

[0006]

[Means to solve the problem]

This invention features a wall surface that holds the inner and outer rings of the integral oil seal on the fixture body. a foot portion of the extrusion member that forms a recessed portion having This is an integrated oil seal fitting that fits into the oil seal.

[0007]

[Effect]

Hold the inner and outer rings of the integral oil seal in the recess of the fitting body and secure it to the shaft end of the sealing part. When the extruded member is pushed out in the axial direction, the foot of the extruded member Extrude the inner and outer rings at the same time and fit them into the sealing part.

[0008]

【Example】

FIG. 1 is a cross-sectional view showing the usage state of the embodiment of the present invention, in which the area below the center line is an integral part. The state before and after insertion of the type oil seal is shown above the center line. For example, there is an integrated cylinder between the shaft 4 protruding from the cylinder block and the housing 5. When installing the oil seal, attach the main body 6 of the fixture to the end surface of the shaft 4 using a fixture (not shown). Let it be installed. The disc-shaped portion of the main body 6 has an inner wall surface with approximately the same diameter as the shaft 4 and an inner wall surface with approximately the same diameter as the housing 5. It has an outer wall surface and forms a recess 6a for holding the inner and outer rings of the integrated oil seal. A male thread 6b is formed on the shaft portion of 6. The extrusion member 7 that slides on the shaft portion of the main body 6 has a foot portion that fits into the recess 6a of the main body 6. 7a, and a spring 8 is disposed between the main body 6 and the main body 6. Formed on the shaft of the main body 6 One end surface of the outer cylinder 9, which has a female screw 9a formed thereon which is screwed into the male screw 6b, is pressed out with a member. 7 and forms a nut 9b at the other end of the outer cylinder 9.

[0009] At the bottom of Figure 1, which shows the integrated oil seal before installation, the integrated oil seal 1 and 2 are held in the recess 6a of the main body 6, the main body 6 is fixed to the end surface of the shaft 4. Na When the cut 9b is turned with a spanner, the outer cylinder 9 moves forward and the foot 7a of the extrusion member 7 is integrated. The end faces of the inner and outer rings 1 and 2 of the oil seal are simultaneously pushed out, the spring 8 is compressed, and the As shown above 1, the pushing member 7 hits the main body 6 and stops. This position is This is the predetermined mounting position for the oil seal.

0010 As described above, in the integrated oil seal, the outer ring 1 and the inner ring 2 are axially aligned at the same time. The outer ring 1 is pushed out a predetermined distance while maintaining the relative position of the outer ring 1 into the housing 5. Since the inner ring 2 is installed on the shaft 4, the tightness of the integrated oil seal tongue after installation is There is no wobbling and the desired sealing performance is achieved.

[0011]

[Effect of the idea]

This invention allows the inner and outer rings of the integrated oil seal to be attached to the sealing part at the same time. , the relative position of the inner and outer rings in the axial direction after installation can be determined correctly, so it is possible to use the specified sealing machine. performance can be obtained stably.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view showing a conventional integrated oil seal.

[Explanation of symbols]

1 Outer ring 2 Inner ring 3 Oil seat
4 Shaft 5 Housing 6 Mounting tool body 7 Extrusion member 9 Outer cylinder

Claims (1)

[Scope of utility model registration request] Claim 1: A recess is formed in the fixture main body, and the foot portion of the extrusion member that slides on the shaft of the fixture main body is fitted into the recess. An integrated oil seal fitting featuring the following features.