JP2006090369A - Sleeve - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sleeve securing sealing performance with a shaft without vulcanizing and bonding a rubber like elastic body on an inner circumference surface of the sleeve in the sleeve used for a sealing device or the like and fitted with the shaft with keeping sealing performance. <P>SOLUTION: The sleeve consists of an outer sleeve 41 which consists of a cylinder part 42 and a flange part 43 and has a roughly L shape section, an inner sleeve 51 including a cylinder part 52 fitted with the cylinder part 42 of the outer sleeve 41 on an outer circumference side thereof and fitted with a shaft 3 in an inner circumference side thereof, and a ring 6 fitted in a hole part 61 enclosed by the outer sleeve 41, the inner sleeve 51 and the shaft 3. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a sleeve that retains hermeticity and fits with a shaft.

  Conventionally, as shown in FIG. 4, a sealing device 101 is known that uses a sleeve bonded to rubber on the inner peripheral side in order to maintain sealing performance with a shaft. This sealing device 101 seals an annular space between a housing 102 and a shaft 103 which are assembled concentrically and relatively rotatably, and is bonded to a seal body 104 and a rubber-like elastic body 105. And a sleeve 106 fitted to the shaft.

  The seal body 104 includes a rubber-like elastic seal seal 107 and a metal core 108. The seal seal 107 includes a fixed seal 109, a fixed seal 109, and an inner periphery of the housing. The metal cored bar 108 is fitted to the inner periphery of the housing 102 via the fixed sealing part 109. The seal part 111 has a plurality of seal lips 110 that are integrally formed and slides on the sleeve 106. Yes.

  The sleeve 106 is made of a metal having a substantially L-shaped cross section including a cylindrical portion 112 fitted to a shaft and a flange portion 113 extending in the outer diameter direction from one end of the cylindrical portion 112 on the atmosphere side. The sealing fluid side A end surface of the flange portion 113 is a sliding surface on which the plurality of seal lips 110 are slidably sealed, and the inner peripheral surface of the cylindrical portion 112 and the atmospheric side B end surface of the flange portion 113 are rubber. The cylindrical portion 112 is covered with the elastic body 105 and is fitted to the shaft 103 in a state of being coupled with the rubber elastic body 105 to ensure sealing performance.

  Since the rubber-like elastic body 105 covering the sleeve 106 is bonded to the sleeve 106 by vulcanization adhesion, the sleeve 106 and the rubber-like elastic body 105 are vulcanized and bonded before the sealing device 101 is mounted in the annular space. It is necessary to combine them with each other. In this operation, the step of applying the adhesive to the sleeve 106, the step of preparing the fabric of the rubber-like elastic body 105 to be bonded to the sleeve 106, and the vulcanization and bonding of the fabric of the sleeve 106 and the rubber-like elastic body 105 are performed. There are problems that the process is complicated and the work is complicated and the cost is high.

  Further, Patent Document 1 below proposes a sealing device in which a sleeve and a shaft are directly fitted and a rubber-like elastic body is not interposed. However, a rubber-like elastic body having a seal lip on the flange portion of the sleeve is vulcanized. A process of securing the sealing property by bonding and securing the sleeve and the rubber-like elastic body by vulcanization bonding is necessary.

  Further, Patent Document 2 below proposes a sealing device that seals using an O-ring between a sleeve and a shaft. However, a rubber-like elastic body bonded by vulcanization adhesion on the inner diameter side of the sleeve is proposed. It is an invention in which a recess is formed and an O-ring is attached to the recess, and a step of joining the sleeve and the rubber-like elastic body by vulcanization adhesion is necessary.

Utility Model Registration No. 2585629 JP 07-317914 A

  The present invention has been made to solve the above-described problems of the prior art, and an object of the present invention is to provide a sleeve that fits with a shaft while maintaining sealing performance used in a sealing device or the like. It is an object of the present invention to provide a sleeve that can ensure sealing performance with a shaft without vulcanizing and bonding a rubber-like elastic body to the peripheral surface.

  In order to achieve the above object, a sleeve according to claim 1 of the present invention includes an outer sleeve having a cylindrical portion and a flange portion, and is fitted on the cylindrical portion and the outer peripheral side of the outer sleeve, and is fitted on the shaft and the inner peripheral side. An inner sleeve having a cylindrical portion to be joined, and a ring fitted into a hole surrounded by the outer sleeve, the inner sleeve, and the shaft are provided.

  The present invention has the following effects.

  That is, the sleeve according to the present invention having the above-described configuration is different from the connection between the metal and the rubber because the connection between the outer sleeve and the inner sleeve fitted to the shaft is based on the connection between the metal and the metal. The joining operation of the outer sleeve and the inner sleeve can be easily performed. In addition, since the ring is mounted in the hole portion surrounded by the inner sleeve, the outer sleeve, and the shaft, the sealing performance can be ensured even when a metal inner sleeve is fitted to the shaft.

  Preferred embodiments of the present invention will be described below with reference to the drawings. However, the scope of the present invention is not intended to be limited to the contents described in this embodiment unless otherwise specified.

  FIG. 1 is a cross-sectional view of an essential part showing a state in which a sealing device using a sleeve according to the present invention is mounted on a shaft and a housing, and is configured as follows.

  The sealing device 1 is fitted into an annular space formed by a housing 2 and a shaft 3 which are coaxially assembled relative to each other, so that the sealing fluid does not leak to the atmosphere side B, and the atmosphere side B The seal body 10, the sleeve 4, and the ring 6 are provided.

  The seal main body 10 has a metal core 20 and a rubber seal seal 30. The cored bar 20 includes a first cylindrical part 21 that is fitted to the housing 2 via a fixed sealing part 31 to be described later, and a first flange that extends in the inner circumferential direction from the sealed fluid side A end of the first cylindrical part 21. Part 22, a second cylindrical part 23 extending obliquely from the inner peripheral side end of the first flange part 22 to the atmosphere side B, and a second flange extending in the inner peripheral direction from the atmospheric side B end of the second cylindrical part 23 Portion 24, a third cylindrical portion 25 extending from the inner peripheral end portion of the second flange portion 24 to the sealing fluid side A, and a third flange portion extending from the sealing fluid side A end portion of the third cylindrical portion 25 in the inner peripheral direction. 26. The seal sealing portion 30 is a fixed sealing portion that is bonded to the outer peripheral side of the first cylindrical portion 21 of the metal core 20, the sealing fluid side of the first flange portion 22, and the inner peripheral side of the second cylindrical portion by vulcanization adhesion. 31 and a sealing part 32 which is formed integrally with the fixed sealing part 31 and is joined by vulcanization adhesion so as to cover the second flange part 24, the third cylindrical part 25 and the third flange part 26 of the cored bar 20. It consists of. The seal portion 32 extends from the tip of the third flange portion 26 of the core metal 20 to the sealing fluid side A and slides on a cylindrical portion 42 of the outer sleeve 41 described later, and the tip of the third flange portion 26. The first dust seal lip 34 on the sealed fluid side A extending from the atmosphere side B to the cylindrical portion 42 of the outer sleeve 41, the second dust seal lip 35 positioned on the atmosphere B B, and the outer sleeve 41 The third dust seal lip 36 slides on the first flange portion 43.

  As shown in FIG. 2, the sleeve 4 includes a cylindrical portion 42 on which the oil seal lip 33, the first dust seal lip 34, and the second dust seal lip 35 are slid, and an outer circumferential direction from the atmosphere side B end of the cylindrical portion 42. An outer sleeve 41 comprising a first flange portion 43 extending in the direction from which the third dust seal lip 36 slides, a second flange portion 44 extending in the inner circumferential direction from the sealing fluid side A of the cylindrical portion 42, and a cylinder of the outer sleeve 41. A cylindrical portion 52 fitted to the inner peripheral side of the portion 42 and an inner sleeve 51 including a flange portion 53 extending in the outer peripheral direction from the atmosphere side B end portion of the cylindrical portion 52 are provided.

  The cylindrical portion 52 of the inner sleeve 51 has a skew portion 56 at the substantially center, an atmosphere side portion 54 that is continuous with the flange portion with the skew portion as a boundary, and a sealed fluid portion on the inner peripheral side from the atmosphere side portion 54. 55. The atmospheric side portion 54 has an outer peripheral surface 54 a fitted to the inner peripheral surface 42 a of the cylindrical portion 42 of the outer sleeve 41, and the sealing fluid portion 55 has an inner peripheral surface 55 a fitted to the outer peripheral surface 3 a of the shaft 3.

  The outer sleeve 41 is surrounded by the atmosphere side surface 44a of the second flange portion 44 and the inner peripheral surface 42a of the cylindrical portion 42, the sealed fluid side end surface 55c of the inner sleeve 51, and the outer peripheral surface 3a of the shaft 3. An O-ring 6 made of a rubber-like elastic body is attached to the hole 61.

  Therefore, in the sleeve 4 having the above-described configuration, the cylindrical portion 42 of the outer sleeve 41 on which the seal portion 32 slides and the cylindrical portion 52 of the inner sleeve 51 fitted on the shaft 3 are fitted by a metal-to-metal connection. Since the outer sleeve 41 and the inner sleeve 51 are attached, it is possible to easily perform the connecting operation of the outer sleeve 41 and the inner sleeve 51 and to eliminate the operation of connecting the metal and the rubber by vulcanization adhesion. Further, since the O-ring 6 made of a rubber-like elastic body is attached to the hole 61 surrounded by the outer sleeve 41, the inner sleeve 51, and the shaft 3, the metal inner sleeve 51 is fitted to the shaft 3. Even when combined, the sealability between the shaft 3 and the inner sleeve 51 can be secured by the O-ring 6 made of a rubber-like elastic body.

  In the above embodiment, the cylindrical portion 52 of the inner sleeve 51 has the sealing fluid portion 55 located on the inner peripheral side of the atmosphere side portion 54, so that the sealing fluid portion 55 is fitted to the shaft 3, and the atmosphere side portion 54. 3 is fitted to the outer sleeve 41. Conversely, as shown in FIG. 3, the sealing fluid portion 55 is located on the outer peripheral side of the atmosphere side portion 54 and is fitted to the outer sleeve 41. 3 may be fitted.

  As the material of the O-ring 6, a resin is generally used in addition to rubber. Further, the shape of the ring 6 is not limited to the O ring, and may be any shape such as a D ring, a square ring, and an X ring.

Sectional drawing of the sealing device which concerns on the Example of this invention 1 is an enlarged sectional view of a sleeve in the sealing device of FIG. Enlarged sectional view of a sleeve according to another embodiment Sectional drawing of the sealing device which concerns on a prior art example

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sealing device 2 Housing 3 Shaft 4 Sleeve 41 Outer sleeve 51 Inner sleeve 42,52 Cylindrical part 43,44,53 Flange part 54 Atmosphere side part 55 Sealing fluid side part 56 Skew part 6 Ring 10 Seal body part 20 Core 21 , 23, 25 Cylindrical part 22, 24 Flange part 30 Seal seal part 31 Fixed seal part 32 Seal part 33 Oil seal lip part 34, 35, 36 Dust seal lip 61 Hole A Sealing fluid side B Atmosphere side

Claims (1)

  An outer sleeve having a cylindrical portion and a flange portion; an inner sleeve having a cylindrical portion fitted on the outer peripheral side of the outer sleeve and fitted on the inner peripheral side of the shaft; the outer sleeve and the inner sleeve; A sleeve comprising: a ring fitted into a hole surrounded by the shaft.

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