JP6509613B2 - Pinned rubber bush and method of assembling and disassembling the same - Google Patents

Description

  The present invention relates to a rubber bush with a pin used, for example, for an oil damper for railway vehicles, and a method of assembling and disassembling the same.

Generally, a rubber bush 100 with a pin as shown in FIG. 11 is used for an oil damper for railway vehicles and the like. The rubber bush 100 with a pin is substantially compressed and pre-compressed between the shaft portion (pin) 101 as an inner member, the outer cylindrical portion 102 as an outer member, and the shaft portion 101 and the outer cylindrical portion 102. It is known that it comprises a cylindrical rubber portion 103, and the shaft portion 101, the rubber portion 103 and the outer cylinder portion 102 are integrated by vulcanization bonding (see, for example, Patent Document 1).
As shown in FIG. 11, in the rubber bush 100 with a pin, the shaft portion 101 is, for example, fastened by a bolt or the like to a mounting portion 104 such as a bogie in a railway vehicle, and the outer cylinder portion 102 supports an axle, for example. The mounting portion 106 of the oil damper 105 is mounted. The above-mentioned pin-pinted rubber bush 100 exhibits stable vibration-proofing performance against traveling vibration and the like of a railway vehicle because the shaft portion 101, the rubber portion 103 and the outer cylinder portion 102 are integrated by vulcanization bonding. can do.

JP 2003-226239 A

  However, the rubber portion 103 of the rubber bush 100 with a pin is susceptible to cracking and its durable life is generally about 6 to 8 years, compared to the metallic shaft portion 101 and the outer cylinder portion 102. And extremely short. When the rubber portion 103 has reached the end of its life, the entire pinned rubber bush 100 including the shaft portion 101 and the outer cylinder portion 102 bonded by vulcanization and the rubber portion 103 is replaced. Therefore, in the rubber bush 100 with a pin, the shaft portion 101 and the outer cylinder portion 102 which can be sufficiently used can not but be discarded together with the rubber portion 103, and there is a problem that the maintenance cost is excessive.

  The present invention has been made to solve such a problem, and the shaft portion, the rubber portion, and the outer cylinder portion are integrated without being bonded by vulcanization, and when the rubber portion reaches its life, only the rubber portion is removed. An object of the present invention is to provide a rubber bush with a pin which can be easily replaced to reuse the shaft portion and the outer cylinder portion and a method of assembling and disassembling the same.

In order to achieve the above object, a rubber bush with a pin and a method of assembling and disassembling the same according to the present invention have the following configuration.
(1) The shaft portion, an outer cylinder portion which is disposed on the outer peripheral side of the shaft portion and mounted in the through hole of the mounting object, and is fitted and pre-compressed between the shaft portion and the outer cylinder portion A rubber bushing with a pin having a substantially cylindrical rubber portion,
The outer cylinder portion is composed of a plurality of outer cylinder divided pieces divided in the circumferential direction, and an axial end of each outer cylinder divided piece receives a load for pre-compressing the rubber portion in the axial direction. The part is formed on the inner diameter side of the outer circumferential surface of the outer cylinder divided piece.

In the present invention, the outer cylinder portion is composed of a plurality of outer cylinder divided pieces divided in the circumferential direction, and a load for pre-compressing the rubber portion in the axial direction at the axial end of each outer cylinder divided piece Since the shelf portion for receiving the inner sleeve is formed on the inner diameter side of the outer peripheral surface of the outer cylinder divided piece, a jig or the like is engaged with the shelf portion of each outer cylinder divided piece to pre-load the rubber portion in the axial direction. In the state where the load to be compressed is applied, the diameter of the outer cylindrical portion can be reduced slightly smaller than the through hole of the mounting object, and the outer cylindrical portion can be inserted into the through hole. In addition, after inserting the outer cylindrical portion into the through hole of the mounting object, even if the jig or the like locked to the shelf is removed, the outer cylindrical portion inserted into the through hole is only slightly expanded in diameter Then, the load which is crimped to the through hole and pre-compresses the rubber portion in the axial direction is substantially maintained as it is. Therefore, the shaft portion, the rubber portion, and the outer cylinder portion can be integrated in a state where the rubber portion is pre-compressed without bonding by vulcanization, and the outer cylinder portion can be easily mounted in the through hole of the mounting object . In addition, since the shelf portion is formed on the inner diameter side of the outer peripheral surface of the outer cylinder divided piece, when inserting the outer cylinder portion into the through hole of the mounting object, the jig etc. Can avoid interference with
In addition, when the rubber portion reaches the end of life, a jig or the like is engaged with the shelf portion of each outer cylinder divided piece, and the outer cylinder portion is loaded with a load that pre-compresses the rubber portion in the axial direction. The diameter of the shaft portion, the rubber portion and the outer cylinder portion can be made to escape from the through hole of the mounting object by slightly reducing the diameter of the shaft. After that, the jig etc. locked to the shelf of each outer cylinder divided piece is removed, and the load for pre-compressing the rubber in the axial direction is released to separate the shaft, the rubber and the outer cylinder. The rubber part can be easily replaced. In this case, the shaft portion and the outer cylinder portion can be reused.
Therefore, according to the present invention, the shaft portion, the rubber portion and the outer cylinder portion are integrated without being bonded by vulcanization, and when the rubber portion reaches the end of life, only the rubber portion is easily exchanged to It is possible to provide a rubber bushing with a pin that can be reused with the tubular portion.

(2) In the rubber bush with pin described in (1),
An engagement protrusion and an engagement recess are formed at circumferential end portions of the outer cylinder divided pieces so as to elastically engage adjacent outer cylinder divided pieces.

In the present invention, since the engagement convex part and the engagement concave part which elastically engage the adjacent outer cylinder divided pieces are formed at the circumferential direction end of the outer cylinder divided pieces, they are adjacent to each other. Even when the outer cylinder divided pieces are slightly separated from each other, the outer cylinder divided pieces can be engaged with each other. Therefore, in the state where adjacent outer cylinder divided pieces are engaged, the diameter of the outer cylindrical portion can be slightly increased, and the rubber portion can be easily inserted on the inner peripheral side of the outer cylindrical portion.
As a result, when the rubber portion has reached the end of its life, only the rubber portion can be replaced more easily, and maintenance costs can be further reduced.

(3) In the rubber bush with pin described in (1) or (2),
The rubber portion is formed by laminating a plurality of plate-like rubbers in a radial direction.

In the present invention, since the rubber portion is formed by laminating a plurality of plate-like rubbers in the radial direction, a plurality of commercially available plate-like rubbers are cut into a predetermined shape and stacked while being wound in the radial direction. Thus, the rubber portion can be formed into a substantially cylindrical shape. Therefore, the rubber portion can be easily formed at low cost without using a rubber mold for integrally molding the rubber portion. Further, it is also possible to replace only some of the degraded plate-like rubber among the plurality of stacked plate-like rubbers.
As a result, when the rubber portion has reached the end of its life, it is possible to replace only the rubber portion at lower cost and to further reduce the maintenance cost.

(4) In the rubber bush with pin described in any one of (1) to (3),
A pressing member is formed on the shaft portion and a bulging portion bulging outward is formed, and a pressing member for pressing the rubber portion along the bulging portion between the outer cylindrical portion and the rubber portion Is inserted.

In the present invention, a bulging portion that bulges to the outer peripheral side is formed in the shaft portion, and a pressing member that presses the rubber portion along the bulging portion between the outer cylindrical portion and the rubber portion. Since the position of the rubber portion with respect to the bulging portion is prevented, it is possible to reduce the difference between the spring constant in the axial direction of the rubber portion and the spring constant in the direction perpendicular to the axis (radial direction). Further, it is not necessary to form the inner peripheral surface of the outer cylindrical portion following the bulging portion of the shaft portion, and the outer cylindrical portion can be easily formed from a cylindrical body having a predetermined thickness.
As a result, while improving the performance of the rubber part and simplifying the outer cylinder part, when the rubber part reaches the end of life, it is possible to replace only the rubber part at a lower cost and to further reduce the maintenance cost. it can.

(5) In the rubber bush with pin described in (4),
The pressing member is formed by laminating a plurality of plate-like rubbers.

In the present invention, since the pressing member is formed by laminating a plurality of plate-like rubbers, it is possible to easily form the pressing member by cutting and laminating a commercially available plate-like rubber into a predetermined shape. it can. Therefore, the pressing member can be easily formed at low cost without using a rubber mold integrally molded into a predetermined shape. Further, it is also possible to replace only some of the degraded plate-like rubber among the plurality of stacked plate-like rubbers.
As a result, when the pressing member reaches the end of its life, it is possible to replace only the pressing member at lower cost and to further reduce the maintenance cost.

(6) In the rubber bush with pin described in (5),
The inner peripheral surface of the outer cylindrical portion may be provided with a flanged cylindrical body for restricting an axial end edge of the plate-like rubber in the pressing member from the outside.

In the present invention, since the inner peripheral surface of the outer cylinder portion is provided with the flanged cylindrical body for restricting the axial end edge of the plate-like rubber in the pressing member from the outer side, the plate-like members in the pressing member are stacked. It is possible to easily prevent displacement of the rubber, fraying and the like.
As a result, while improving the shape stability of the pressing member, when the pressing member reaches the end of its life, it is possible to replace only the pressing member at lower cost and to further reduce the maintenance cost.

(7) A method of assembling and disassembling the pinned rubber bush described in any one of (1) to (6),
And a holding jig for holding the load for pre-compressing the rubber portion in the axial direction by being locked to the shelf portion, and holding the outer cylindrical portion in a diameter-reduced state by the holding jig. The outer cylindrical portion is attached to and detached from the through hole of the mounting object.

In the present invention, there is provided a holding jig for holding the load for pre-compressing the rubber portion in the axial direction by being locked to the shelf portion, and holding the outer cylindrical portion in a diameter-reduced state by the holding jig. Since the outer cylinder part is attached to and detached from the through hole of the mounting object, the holding jig is engaged with the shelf part of each outer cylinder divided piece, and a load that pre-compresses the rubber part in the axial direction is applied. Thus, the diameter of the outer cylindrical portion can be reduced slightly smaller than the through hole of the mounting object, and the outer cylindrical portion can be inserted into the through hole. In addition, after inserting the outer cylindrical portion into the through hole of the mounting object, the outer cylindrical portion inserted into the through hole is only slightly expanded in diameter by removing the holding jig locked to the shelf portion. Is crimped to the through hole of the mounting object. The outer cylindrical portion is crimped to the through hole of the mounting object only by slightly expanding the diameter, so that the load for pre-compressing the rubber portion in the axial direction is maintained substantially as it is. Therefore, the shaft portion, the rubber portion, and the outer cylinder portion can be integrated in a state where the rubber portion is pre-compressed without bonding by vulcanization, and the outer cylinder portion can be easily mounted in the through hole of the mounting object . In addition, since the shelf portion is formed on the inner diameter side of the outer peripheral surface of the outer cylinder divided piece, when inserting the outer cylinder portion into the through hole of the mounting object, the holding jig and the through hole which pre-compress the rubber portion Can avoid interference with
In addition, when the rubber portion reaches the life, the holding jig is engaged with the shelf portion of each outer cylinder divided piece, and the outer cylinder portion is loaded with a load that pre-compresses the rubber portion in the axial direction. The diameter of the shaft portion, the rubber portion and the outer cylinder portion can be made to escape from the through hole of the mounting object by slightly reducing the diameter of the shaft. After that, the holding jig locked to the shelf portion of each outer cylinder divided piece is removed, and the shaft portion, the rubber portion, and the outer cylinder portion are separated by releasing the load that pre-compresses the rubber portion in the axial direction. Then, only the rubber part can be replaced easily. In this case, the shaft portion and the outer cylinder portion can be reused.
Therefore, according to the present invention, the shaft portion, the rubber portion and the outer cylinder portion are integrated without being bonded by vulcanization, and when the rubber portion reaches the end of life, only the rubber portion is easily exchanged to It is possible to provide a method for assembling and disassembling a pinned rubber bush which can be reused with a tubular portion.

(8) A method of assembling and disassembling the pinted rubber bush described in (7),
The holding jig includes a locking member having a claw portion that can be locked to the shelf portion, and a base end portion integrally formed with the claw portion and formed to be able to be fastened to the shaft portion. The outer cylinder portion is inserted into and removed from the through hole of the mounting object in a state where the locking member is fastened to the shaft portion.

In the present invention, the holding jig includes a locking member including a claw portion that can be locked to the shelf portion, and a base end portion integrally formed with the claw portion and formed to be able to be fastened to the shaft portion. Since the outer cylinder portion is inserted into and removed from the through hole of the mounting object in a state where the locking member is fastened to the shaft portion, and the locking member is fastened to the shaft portion, The outer cylinder portion can be inserted into the through hole of the mounting object or the outer cylinder portion can be released from the through hole of the mounting object while reliably maintaining the locking state of the locking member with the claw portion. Therefore, the mounting and demounting operation of the attachment object of the outer cylinder portion to the through hole can be performed more reliably and easily. Moreover, the attachment and detachment work does not require a large-scale device such as a press-fit device for press-fitting the outer cylindrical portion into the through-hole of the mounting object.
As a result, the shaft portion, the rubber portion, and the outer cylinder portion are easily integrated without vulcanization and bonding, and when the rubber portion reaches the life, only the rubber portion is replaced more easily and the shaft portion and the outer cylinder The department can be reused.

  According to the present invention, the shaft portion, the rubber portion, and the outer cylinder portion are integrated without being bonded by vulcanization, and when the rubber portion reaches the end of life, only the rubber portion is easily exchanged and the shaft portion and the outer cylinder portion It is possible to provide a pinned rubber bush which can be reused and a method of assembling and disassembling the same.

It is sectional drawing of the rubber bush with a pin which concerns on embodiment of this invention. It is an A view front view shown in FIG. It is a BB sectional view shown in FIG. It is sectional drawing in the 1st modification of the rubber bush with a pin shown in FIG. FIG. 5 is a front view of a view C shown in FIG. 4; It is sectional drawing in the 2nd modification of the rubber bush with a pin shown in FIG. It is a D view front view shown in FIG. In the rubber bushing with a pin shown in FIG. 1, it is a front view of the pressurization jig | tool which pre-compresses a rubber part. In the rubber bush with a pin shown in FIG. 1, it is sectional drawing of the holding jig holding the state which made the rubber part pre-compressing. It is an E view front view shown in FIG. It is explanatory drawing which mounted the conventional rubber bush with a pin to the oil damper for rail vehicles.

  Next, a rubber bush with pin according to an embodiment of the present invention will be described in detail with reference to the drawings. First, the entire configuration of the rubber bush with a pin according to the present embodiment will be described, and then, a modified example of the rubber bush with a pin will be described. Finally, the method of assembling and disassembling the rubber bush with a pin will be described.

<Overall configuration of rubber bush with pin>
First, the whole structure of the rubber bush with a pin which concerns on this embodiment is demonstrated using FIGS. 1-3. FIG. 1 shows a cross-sectional view of a rubber bush with a pin according to an embodiment of the present invention. FIG. 2 shows a front view of A view shown in FIG. FIG. 3 shows a cross-sectional view taken along the line B-B shown in FIG. Fig.3 (a) shows the state which diameter-reduced the outer cylinder part, and FIG.3 (b) shows the state which diameter-expanded the outer cylinder part.

  As shown in FIGS. 1 to 3, the pin-pinted rubber bush 10 according to the present embodiment includes the shaft portion 1 and an outer cylinder disposed on the outer peripheral side of the shaft portion 1 and mounted in the through hole 41 of the mounting object 4. A portion 2 and a pre-compressed, substantially cylindrical rubber portion 3 fitted between the shaft portion 1 and the outer cylinder portion 2 are provided, and are mounted on, for example, an oil damper for a railway vehicle.

  The shaft portion 1 is formed of a substantially rod-like body made of metal, and a bulging portion 11 bulging in an arc shape toward the outer peripheral side is formed at a central portion in the axial direction. The shaft portion 1 is formed with connecting portions 12 axially extended from both ends of the bulging portion 11 with a predetermined thickness. Fastening holes 13 are formed in the connecting portion 12 so as to be respectively vertically formed. The connecting portion 12 inserts a bolt or the like into the fastening hole 13 and fixes the object (for example, a carriage or the like) 8 to be mounted. At the contact portion of the connecting portion 12 with the mounting object 8, a vertical wall portion 14 which also serves as a detent for the shaft portion 1 is formed.

  The outer cylinder portion 2 is made of a metal-made cylindrical body with a shelf, and is disposed on the outer peripheral side of the bulging portion 11 of the shaft portion 1. The outer cylinder portion 2 is crimped to the through hole 41 of the mounting object (for example, an oil damper for a railway vehicle). The axial length of the outer cylindrical portion 2 is substantially the same as the axial length of the bulging portion 11 of the shaft portion 1. The outer cylinder portion 2 is composed of a plurality of (three) outer cylinder divided pieces 21, 22 and 23 which are divided into three equal parts in the circumferential direction, and an axial end of each outer cylinder divided piece is a rubber portion Shelf portions 211, 221, 231 for receiving a load for pre-compressing 3 in the axial direction are formed on the inner diameter side with a predetermined level difference from the outer peripheral surfaces 212, 222, 232 of the outer cylinder divided pieces. The shelf portions 211, 221, 231 are formed in an arc shape. In addition, the height of the level | step difference of the outer peripheral surfaces 212,222,232 and the shelf parts 211,221,231 is set more than the thickness of the nail | claw part 611,621 of the holding jig 6 mentioned later.

  The outer cylindrical portion 2 has a central portion in the axial direction formed in a thin-walled shape, and both end portions in the axial direction formed in a thick-walled shape, corresponding to the arc shape of the bulging portion 11 of the shaft portion 1. The circumferential end portions 213, 223, 233 of the outer cylinder divided pieces 21, 22, 23 are formed with an engagement convex portion 5 and an engagement concave portion 53 which elastically engage adjacent outer cylinder divided pieces. It is done. The engagement convex portion 5 and the engagement concave portion 53 are formed at both axial end portions of the outer cylinder divided pieces 21, 22, 23 formed in a thick-walled shape. The engagement convex portion 5 is configured of a spherical ball body 51 and a ball urging body 52 for urging the ball body 51 toward the engagement concave portion 53. The ball biasing body 52 is, for example, a rubber member.

  The ball biasing body 52 is inserted into a housing hole 233 h which is bored in the circumferential direction from the circumferential end portion 233. Even when there is a slight clearance P between the circumferential end portions 213, 223, 233 of the adjacent outer cylinder divided pieces 21, 22, 23, the biasing force of the ball biasing member 52 causes the ball 51 and the engagement concave portion 53 to be engaged. Can be held in engagement with the Therefore, even when the diameter of the outer cylindrical portion 2 is reduced or enlarged, the state in which the outer cylinder divided pieces 21, 22, 23 are connected to each other can be maintained. An inclined hole 215 is bored in the engagement recess 53 from the outer peripheral surface of the outer cylinder divided piece 21. The inclined hole 215 is a hole for inserting a pin for pushing back the ball body 51 into the storage hole 233 h against the urging force of the ball urging member 52.

  The rubber portion 3 is formed of a substantially cylindrical body made of rubber, and is squeezed in the radial direction by the outer peripheral surface of the bulging portion 11 of the shaft portion 1 and the inner peripheral surface of the outer cylindrical portion 2. The axial length of the rubber portion 3 is substantially the same as the axial length of the bulging portion 11 of the shaft portion 1. The rubber portion 3 is formed by a rubber molding die integrally molded into a predetermined shape. The rubber portion 3 is component-blended so that the hardness is, for example, about 50 to 60 ° (JIS K 6253), and the precompression rate in the thickness direction is about 20 to 40%.

<Modification of rubber bush with pin>
Next, modified examples of the rubber bush with a pin will be described with reference to FIGS. FIG. 4 shows a cross-sectional view of a first modified example of the rubber bush with pins shown in FIG. The C view front view shown in FIG. 4 is shown in FIG. FIG. 6 shows a cross-sectional view of a second modified example of the rubber bush with pins shown in FIG. FIG. 7 shows a front view of a view D shown in FIG.

(First modification)
As shown in FIGS. 4 and 5, the pin-equipped rubber bush 10B of the first modification is an outer cylinder disposed on the shaft portion 1 and the outer peripheral side of the shaft portion 1 and mounted in the through hole 41 of the mounting object 4 A portion 2B and a substantially cylindrical rubber portion 3B which is fitted between the shaft portion 1 and the outer cylinder portion 2B and pre-compressed is provided, and is mounted on, for example, an oil damper for a railway vehicle. With respect to the rubber bush 10 with a pin of the first modification, only the shaft portion 1 is common to the rubber bush 10 with a pin described above, and the outer cylindrical portion 2B and the rubber portion 3B are different. Here, different outer cylinder part 2B and rubber part 3B are explained in detail, about the common shaft part 1, the same numerals are attached and the explanation is omitted.

  The outer cylindrical portion 2 </ b> B is made of a metal-made cylindrical cylindrical body and is disposed on the outer peripheral side of the bulging portion 11 of the shaft portion 1. The outer cylindrical portion 2B is manufactured by cutting a metal cylindrical body (for example, a cylindrical steel pipe) having a predetermined thickness to a predetermined length, and reducing the diameter of only the axial direction end portion in a step shape. The outer cylinder part 2B is crimped | bonded to the through-hole 41 of attachment object (for example, oil damper etc. for rail vehicles etc.) 4 (refer FIG. 1). The axial length of the outer cylindrical portion 2B is substantially the same as the axial length of the bulging portion 11 of the shaft portion 1. The outer cylinder portion 2B is composed of a plurality of (three) outer cylinder divided pieces 21B, 22B and 23B divided into three equal parts in the circumferential direction, and rubber portions are provided at axial end portions of the respective outer cylinder divided pieces. Shelf portions 211B, 221B, and 231B for receiving a load for pre-compressing 3B in the axial direction are formed on the inner diameter side at predetermined steps from the outer peripheral surfaces 212B, 222B, and 232B of the outer cylinder divided pieces. The shelf portions 211B, 221B, and 231B are formed in an arc shape centering on the axis. The height of the step between the outer peripheral surfaces 212B, 222B and 232B and the shelf portions 211B, 221B and 231B is set to be equal to or larger than the thickness of the claw portions 611 and 621 of the holding jig 6 described later.

  The rubber portion 3B is formed in a substantially cylindrical shape by laminating a plurality of (for example, three) plate-shaped rubbers 31B, 32B, and 33B in the radial direction. Each of the plate-like rubbers 31B, 32B, and 33B is formed by cutting a commercially available sheet-like plate-like rubber into a predetermined size and winding it around the bulging portion 11 of the shaft portion 1. The axial length of the plate-like rubbers 31B, 32B, and 33B is substantially the same as the axial length of the bulging portion 11 of the shaft portion 1. The plate-like rubbers 31B, 32B, 33B are component-blended so that the hardness is, for example, about 50 to 60 ° (JIS K 6253) and the precompression rate in the thickness direction is about 20 to 40%. There is. Further, a pair of pressing rubber portions (pressing members) 34B and 35B is inserted between the outer cylindrical portion 2B and the rubber portion 3B. The pressing rubber portions 34B and 35B are disposed axially back and forth, and formed in an annular shape so as to press the plate-like rubbers 31B, 32B and 33B from the outer peripheral side and to be along the bulging portion 11 of the shaft portion 1 . The pressing rubber portions 34B and 35B are formed by a rubber mold that is integrally molded in an annular shape with a substantially triangular cross section.

(2nd modification)
As shown in FIGS. 6 and 7, the pin-attached rubber bush 10 </ b> C of the second modified example is an outer cylinder disposed on the shaft portion 1 and the outer peripheral side of the shaft portion 1 and attached to the through hole 41 of the mounting object 4. A portion 2C and a pre-compressed, substantially cylindrical rubber portion 3C fitted between the shaft portion 1 and the outer cylinder portion 2C are provided, and are mounted on, for example, an oil damper for a railway vehicle. A rubber bush 10C with a pin according to a second modification has only the shaft 1 in common to the rubber bush 10 with a pin described above, and the outer cylinder 2C and the rubber 3C are different. Here, the different outer cylindrical portion 2C and rubber portion 3C will be described in detail, and the common shaft portion 1 will be assigned the same reference numerals and the description thereof will be omitted.

  The outer cylindrical portion 2 </ b> C is made of a metal-made cylindrical cylindrical body and is disposed on the outer peripheral side of the bulging portion 11 of the shaft portion 1. The outer cylindrical portion 2C is manufactured in the same manner as the outer cylindrical portion 2B of the first modification. The outer cylindrical portion 2C is crimped to the through hole 41 of the object to be mounted (for example, an oil damper for railway vehicles, etc.) (see FIG. 1). The axial length of the outer cylindrical portion 2C is substantially the same as the axial length of the bulging portion 11 of the shaft portion 1. The outer cylinder portion 2C is composed of a plurality of (three) outer cylinder divided pieces 21C, 22C, 23C divided into three equal parts in the circumferential direction, and rubber portions are provided at axial end portions of the respective outer cylinder divided pieces. Shelf portions 211C, 221C, and 231C for receiving a load for pre-compressing 3C in the axial direction are formed on the inner diameter side at predetermined steps from the outer peripheral surfaces 212C, 222C, and 232C of the outer cylinder divided pieces. The shelf portions 211C, 221C, and 231C are formed in an arc shape centering on the axis. The height of the step between the outer peripheral surfaces 212C, 222C, and 232C and the shelf portions 211C, 221C, and 231C is set to be equal to or greater than the thickness of the claw portions 611 and 621 of the holding jig 6 described later.

  A flanged cylindrical body 24 made of resin is mounted on the inner circumferential surface of the outer cylindrical portion 2C. The flanged cylindrical body 24 is manufactured by cutting the heat-shrinkable tube into a predetermined length and bending only the axial end portion in an L-shape in the axial direction while heating. The flanged cylindrical body 24 is formed so as to externally restrict the axial end edges of the plate-like rubbers 341C, 342C, 343C, and the plate-like rubbers 351C, 352C, 353C in the pressing rubber portions 34C, 35C described later There is. The flanged cylindrical body 24 may be integrally formed so as to cover the pressing rubber portions 34C, 35C, but may be divided in the circumferential direction as in the case of the outer cylinder divided pieces 21C, 22C, 23C.

  The rubber portion 3C is formed in a substantially cylindrical shape by laminating a plurality of (for example, three) plate-shaped rubbers 31C, 32C, and 33C in the radial direction. Each of the plate-like rubbers 31C, 32C, and 33C cuts a commercially available sheet-like plate-like rubber into a predetermined size and forms the bulging portion 11 of the shaft portion 1 in the same manner as the rubber portion 3B of the first modification. It is wound and formed. The axial length of the plate-like rubbers 31C, 32C, 33C is substantially the same as the axial length of the bulging portion 11 of the shaft portion 1. The plate-like rubbers 31C, 32C, 33C are, for example, component-blended so that the hardness is about 50 to 60 ° (JIS K 6253) and the precompression rate in the thickness direction is about 20 to 40%. There is.

  A pair of pressing rubber portions (pressing members) 34C and 35C are inserted between the outer cylindrical portion 2C and the rubber portion 3C. The pressing rubber portions 34C and 35C are disposed axially forward and backward, and are wound in an annular shape so as to press the plate-like rubbers 31B, 32B and 33B from the outer peripheral side to be along the bulging portion 11 of the shaft portion 1 There is. The pressing rubber portions 34C and 35C laminate a plurality of (for example, three) plate-like rubbers 341C, 342C and 343C and plate-like rubbers 351C, 352C and 353C in the radial direction to form a substantially triangular cross section as a whole. It is formed as. The plate-like rubbers 341C, 342C and 343C and the plate-like rubbers 351C, 352C and 353C are formed by cutting commercially available sheet-like plate-like rubbers into predetermined sizes.

<Assembly and disassembly method of rubber bush with pin>
Next, a method of assembling and disassembling the present rubber bush with a pin will be described with reference to FIGS. FIG. 8 shows a front view of a pressing jig for pre-compressing the rubber portion in the rubber bush with pin shown in FIG. FIG. 9 is a cross-sectional view of a holding jig for holding the rubber portion in a pre-compressed state in the rubber bush with pin shown in FIG. FIG. 10 shows an E view front view shown in FIG.

(Assembly method)
As shown in FIG. 8, when assembling the rubber bush with a pin, a pressure recovery is performed that applies a load that pre-compresses the rubber portion 3 in the axial direction on the outer peripheral surface of the outer cylinder portion 2 (21, 22, 23). Mount the tool 7. The pressing jig 7 has an outer cylinder contact portion 711 formed in an arc shape along the outer peripheral surface of the outer cylinder portion 2 (21, 22, 23), and horizontal from both end portions of the outer cylinder contact portion 711 It has a pair of frame members 71 consisting of a pressing portion 712 extended in a shape of a circle. Further, the pressing jig 7 is provided with a pressing member 72 for pressing the pressing portions 712 facing each other in the direction in which the pressing portions 712 approach each other. The pressing member 72 includes, for example, a fastening bolt 721 and a nut 722 which pass through the opposing pressing portion 712. By tightening the fastening bolt 721 of the pressing jig 7 and the nut 722, the outer diameter of the outer cylindrical portion 2 (21, 22, 23) is slightly smaller than the through hole 41 of the mounting object 4 (see FIG. 1) Reduce the diameter to a small size.

  Next, as shown in FIGS. 9 and 10, with the pressing jig 7 mounted on the outer peripheral surface of the outer cylindrical portion 2 (21, 22, 23), the shelf of the outer cylinder divided pieces 21, 22, 23 The holding jig 6 is locked to the portions 211, 221, 231. The holding jig 6 is integrally formed with claws 611 and 621 engageable with the racks 211, 221 and 231 of the outer cylinder divided pieces 21, 22 and 23 and the claws 611 and 621, and the shaft 1 And a pressing member 63, 64 for pressing the facing proximal end portions 612, 622 in a direction in which the proximal end portions 612, 622 are opposed to each other. ing. The claws 611 and 621 are formed in an arc shape centering on the axial center, and the outer diameter thereof is set equal to or less than the outer diameter of the outer peripheral surfaces 212 222 and 232 of the outer cylinder divided pieces 21 22 and 23. ing. Further, vertical wall portions 613 and 623 that contact the vertical wall portion 14 of the shaft portion 1 are formed at the base end portions 612 and 622, respectively. The pressing members 63 and 64 are composed of, for example, a fastening bolt 63 and a nut 64 which pass through the opposed proximal end portions 612 and 622. With the locking members 61 and 62 fastened to the shaft portion 1, the screw shaft 631 of the fastening bolt 63 abuts on the fastening hole 13 of the shaft portion 1 and the claws 611 and 621 disengage from the shelf portions 211, 221 and 231 To prevent.

  Next, after removing the pressing jig 7 attached to the outer peripheral surface of the outer cylindrical portion 2 (21, 22, 23), the load is applied in a state in which the rubber portion 3 is compressed in the axial direction. The outer cylinder portion 2 is inserted into the through hole 41 of the object (for example, an oil damper for railway vehicles, etc.) 4. Further, after inserting the outer cylindrical portion 2 into the through hole 41 of the mounting object 4, the claw portions 611, 621 of the holding jig 6 locked to the shelf portions 211, 221, 231 are removed. Thus, the outer cylindrical portion 2 inserted into the through hole 41 of the mounting object 4 is crimped to the through hole 41 only by slightly enlarging the diameter. The outer cylindrical portion 2 is crimped to the through hole 41 of the mounting object 4 only by slightly expanding the diameter, so that the load for precompressing the rubber portion 3 in the axial direction is maintained substantially as it is. Further, the connecting portion 12 of the shaft portion 1 inserts a bolt or the like into the fastening hole 13 and fixes it to the mounting object (for example, a carriage or the like) 8. According to the above procedure, the rubber bush 10 with a pin can be assembled.

(Decomposition method)
Next, as shown in FIGS. 9 and 10, when the rubber portion 3 has reached the end of its life, the connection between the connecting portion 12 of the shaft portion 1 and the object to be attached (for example, a truck or the like) 8 is released. The claws 611 and 621 of the holding jig 6 are engaged with the shelf portions 211, 221 and 231 of the outer cylinder divided pieces 21, 22 and 23, respectively, and the fastening bolt 63 and the nut 64 are tightened. In a state in which a load for pre-compressing in the center direction is applied, the diameter of the outer cylindrical portion 2 is slightly reduced to cause the shaft portion 1, the rubber portion 3 and the outer cylindrical portion 2 to escape from the through hole 41 of the mounting object 4 .

  Thereafter, the holding jig 6 locked to the shelf portions 211, 221, 231 of the outer cylinder divided pieces 21, 22, 23 is removed, and the load for pre-compression of the rubber portion 3 in the axial direction is released. 1 and the rubber part 3 and the outer cylinder part 2 are separated. By this, only rubber part 3 can be replaced easily. In this case, the shaft portion 1 and the outer cylinder portion 2 can be reused. According to the above procedure, the rubber bush with a pin 10 can be disassembled.

<Function effect>
As described above, according to the rubber bush 10 with pin according to the present embodiment described in detail, the outer cylinder portion 2 is composed of a plurality of outer cylinder divided pieces 21, 22, 23 divided in the circumferential direction, each outer cylinder Shelf portions 211, 221, and 231 for receiving a load for pre-compressing the rubber portion 3 in the axial direction are provided at the axial end portions of the split pieces 21, 22, and 23, outer peripheral surfaces 212, 222 of the outer cylinder split pieces, The rubber portion 3 is formed by engaging the claw portions 611 and 621 of the holding jig 6 with the shelf portions 211, 221 and 231 of the outer cylinder divided pieces 21, 22 and 23, respectively. In a state in which a load pre-compressing in the axial direction is applied, the diameter of the outer cylindrical portion 2 is slightly smaller than the through hole 41 of the mounting object 4 and the outer cylindrical portion 2 is inserted into the through hole 41 it can. In addition, after the outer cylindrical portion 2 is inserted into the through hole 41 of the mounting object 4, even if the claw portions 611, 621 of the holding jig 6 locked to the shelf portions 211, 221, 231 are removed, the mounting object The outer cylindrical portion 2 inserted in the through hole 41 of 4 is crimped to the through hole 41 of the mounting object 4 only by slightly enlarging the diameter, and the load for pre-compressing the rubber portion 3 in the axial direction is substantially It is maintained as it is. Therefore, the shaft portion 1, the rubber portion 3 and the outer cylinder portion 2 are integrated in a state in which the rubber portion is pre-compressed without being bonded by vulcanization, and the outer cylinder portion 2 is easily attached to the through hole 41 of the mounting object 4 It can be worn on Moreover, the cost which carries out vulcanization | cure adhesion | attachment of the axial part 1, the rubber part 3, and the outer cylinder part 2 can be made unnecessary.

  Since the shelf portions 211, 221, 231 are formed on the inner diameter side of the outer peripheral surfaces 212, 222, 232 of the outer cylinder divided pieces 21, 22, 23, the outer cylinder portion 2 is a through hole for the mounting object 4 When inserting in 41, interference with the holding jig 6 which pre-compresses the rubber part 3 and the through-hole 41 can be avoided.

  Also, when the rubber portion 3 reaches the end of life, the claw portions 611, 621 of the holding jig 6 are engaged with the shelf portions 211, 221, 231 of the outer cylinder divided pieces 21, 22, 23. In a state where a load for pre-compressing in the axial direction is applied, the diameter of the outer cylindrical portion 2 is slightly reduced to allow the shaft portion 1, the rubber portion 3 and the outer cylindrical portion 2 to pass through the through hole 41 of the mounting object 4 You can escape. Thereafter, the claws 611 and 621 of the holding jig 6 engaged with the shelf portions 211, 221 and 231 of the outer cylinder divided pieces 21, 22 and 23 are removed to load the rubber portion 3 in the axial direction. As a result, the shaft portion 1, the rubber portion 3 and the outer cylinder portion 2 can be separated, and only the rubber portion 3 can be easily replaced. In this case, the shaft portion 1 and the outer cylinder portion 2 can be reused.

  Therefore, according to the present embodiment, the shaft portion 1, the rubber portion 3, and the outer cylinder portion 2 are integrated without being bonded by vulcanization, and when the rubber portion 3 reaches the life, only the rubber portion 3 is easily replaced. Thus, it is possible to provide a rubber bush 10 with a pin which can reuse the shaft portion 1 and the outer cylinder portion 2.

  Further, according to the present embodiment, the adjacent outer cylinder divided pieces 21, 22, 23 are resiliently engaged with the circumferential end portions 213, 223, 233 of the outer cylinder divided pieces 21, 22, 23 respectively. Since the engaging convex portion 5 and the engaging concave portion 53 to be formed are formed, the outer cylinder divided pieces 21, 22, 23 are mutually separated even when the adjacent outer cylinder divided pieces 21, 22, 23 are slightly separated from each other. It can be engaged. Therefore, in a state in which the adjacent outer cylinder divided pieces 21, 22 and 23 are engaged with each other, the diameter of the outer cylinder 2 is slightly expanded, and the rubber portion 3 is easily inserted into the inner peripheral side of the outer cylinder 2. Can. As a result, when the rubber portion 3 reaches the end of life, it is possible to replace only the rubber portion 3 more easily and to further reduce the maintenance cost.

  Further, according to the present embodiment, since the rubber portion 3B (3C) is formed by laminating a plurality of plate-like rubbers 31B, 32B, 33B (31C, 32C, 33C) in the radial direction, a commercially available plate The rubber portion 3B (3C) can be formed into a substantially cylindrical shape by cutting the rubber piece into a predetermined shape and laminating while being wound in the radial direction. Therefore, the rubber portion 3B (3C) can be easily formed at low cost without using a rubber molding die for integrally molding a rubber portion having a predetermined shape. Further, it is also possible to replace only some of the deteriorated plate-like rubbers among the plurality of laminated plate-like rubbers 31B, 32B, 33B (31C, 32C, 33C). As a result, when the rubber portion 3B (3C) reaches the end of its life, it is possible to replace only the rubber portion 3B (3C) at a lower cost and to further reduce the maintenance cost.

  Further, according to the present embodiment, the shaft portion 1 is formed with the arc-shaped bulging portion 11 bulging out to the outer peripheral side, and between the outer cylinder portion 2B (2C) and the rubber portion 3B (3C) Since the pressing rubber portions 34B, 35B (34C, 35C) for pressing the plate-like rubbers 31B, 32B, 33B (31C, 32C, 33C) along the bulging portion 11 are inserted, While preventing positional deviation of the plate-like rubbers 31B, 32B, 33B (31C, 32C, 33C), the difference between the spring constant in the axial direction of the rubber portion 3B (3C) and the spring constant in the direction perpendicular to the axis (radial direction) It can be reduced. Further, it is not necessary to form the inner peripheral surface of the outer cylindrical portion 2B (2C) to follow the bulging portion 11 of the shaft portion 1, and the outer cylindrical portion 2B (2C) can be easily made from a cylindrical body of a predetermined thickness. It can also be formed. As a result, while improving the performance of the rubber portion 3B (3C) and simplifying the outer cylinder portion 2B (2C), when the rubber portion 3B (3C) reaches the end of life, only the rubber portion is replaced at lower cost. The maintenance cost can be further reduced.

Further, according to the present embodiment, since the pressing rubber portion 34C (35C) is formed by laminating a plurality of the plate rubbers 341C, 342C, 343C (351C, 352C, 353C), a commercially available plate rubber The pressure rubber portion 34C (35C) can be easily formed by cutting and laminating them into a predetermined shape. Therefore, the pressing rubber portion 34C (35C) can be easily formed at low cost without using a rubber molding die for integrally molding the pressing rubber portion having a predetermined shape. Further, it is also possible to replace only some of the degraded plate-like rubbers among the plurality of plate-like rubbers 341C, 342C, 343C (351C, 352C, 353C) stacked in the pressing rubber portion 34C (35C).
As a result, when the pressing rubber portion 34C (35C) reaches the life, it is possible to replace only the pressing rubber portion at lower cost and to further reduce the maintenance cost.

  Moreover, according to the present embodiment, the axial direction edge of the plate-like rubbers 341C, 342C, 343C (351C, 352C, 353C) in the pressing rubber portion 34C (35C) is outside the inner peripheral surface of the outer cylindrical portion 2C. Since the flanged cylindrical body 24 is provided which regulates from the side, it is possible to easily prevent positional deviation or fraying of the laminated plate-like rubbers 341C, 342C, 343C (351C, 352C, 353C). As a result, while improving the shape stability of the pressing rubber portion 34C (35C), when the pressing rubber portion 34C (35C) reaches the life, only the pressing rubber portion is replaced at lower cost, and the maintenance cost is further increased. The reduction can be achieved.

  Further, according to the assembling and disassembling method of the rubber bush with a pin according to another embodiment, a holding jig which holds the load for pre-compressing the rubber portion 3 in the axial direction by being locked to the shelf portions 211, 221, 231. 6, and the outer cylindrical portion 2 is held in a reduced diameter state by the holding jig 6, and the outer cylindrical portion 2 is attached to and detached from the through hole 41 of the mounting object 4. With the holding jig 6 locked to the portions 211, 221 and 231, and the load that pre-compresses the rubber portion 3 in the axial direction is applied, the outer cylinder portion 2 is inserted from the through hole 41 of the mounting object 4 The outer cylinder portion 2 can be inserted into the through hole 41 by slightly reducing the diameter. In addition, after inserting the outer cylindrical portion 2 into the through hole 41 of the mounting object 4, the holding jig 6 locked to the shelf portions 211, 221, 231 is removed to thereby insert the outer cylinder portion 2 into the through hole 41. The cylindrical portion 2 is crimped to the through hole 41 of the mounting object 4 only by slightly expanding the diameter. The outer cylindrical portion 2 is crimped to the through hole 41 of the mounting object 4 only by slightly expanding the diameter, so that the load for precompressing the rubber portion 3 in the axial direction is maintained substantially as it is. Therefore, the shaft portion 1, the rubber portion 3 and the outer cylinder portion 2 are integrated in a state where the rubber portion 3 is pre-compressed without bonding by vulcanization, and the outer cylinder portion 2 is integrated into the through hole 41 of the mounting object 4 It can be easily installed. Since the shelf portions 211, 221, 231 are formed on the inner diameter side of the outer peripheral surfaces 212, 222, 232 of the outer cylinder divided pieces 21, 22, 23, the outer cylinder portion 2 is a through hole for the mounting object 4 When inserting in 41, interference with the holding jig 6 which pre-compresses the rubber part 3 and the through-hole 41 can be avoided.

  In addition, when the rubber portion 3 reaches the end of life, the holding jig 6 is engaged with the shelf portions 211, 221, 231 of the outer cylinder divided pieces 21, 22, 23, and the rubber portion 3 is preloaded in the axial direction. In a state where the load to be compressed is applied, the diameter of the outer cylindrical portion 2 can be slightly reduced so that the shaft portion 1, the rubber portion 3 and the outer cylindrical portion 2 can escape from the through hole 41 of the mounting object 4. Thereafter, the holding jig 6 locked to the shelf portions 211, 221, 231 of the outer cylinder divided pieces 21, 22, 23 is removed, and the load for pre-compressing the rubber portion 3 in the axial direction is released. By separating the shaft portion 1, the rubber portion 3 and the outer cylinder portion 2, only the rubber portion 3 can be easily replaced. In this case, the shaft portion 1 and the outer cylinder portion 2 can be reused.

  Therefore, according to the other embodiment, the shaft portion 1, the rubber portion 3 and the outer cylinder portion 2 are integrated without vulcanization and bonding, and when the rubber portion 3 reaches the life, only the rubber portion 3 is simplified. It is possible to provide a method of assembling and disassembling the pin-equipped rubber bush 10 in which the shaft portion 1 and the outer cylinder portion 2 can be reused.

  Further, according to the other embodiment, the holding jig 6 is formed integrally with the claws 611 and 621 engageable with the racks 211, 221 and 231, and the claws 611 and 621, and the shaft is formed. The outer cylindrical portion 2 is provided with a pair of locking members 61 and 62 consisting of base end portions 612 and 622 formed in the portion 1 so as to be able to be fastened, and the locking members 61 and 62 are fastened to the shaft portion 1 The insertion and removal of the mounting object 4 into and from the through-hole 41 of the mounting members 4, the fastening members 61 and 62 are fastened to the shaft 1 to make the shelf parts 211, 221 and 231 of the outer cylinder divided pieces and the fastening members 61 and 62 The outer cylinder portion 2 is inserted into the through hole 41 of the mounting object 4 or the outer cylinder portion 2 is escaped from the through hole 41 of the mounting object 4 while reliably maintaining the engagement with the claws 611 and 621. It can be done. Therefore, the attaching and detaching operation of the attachment subject 4 of the outer cylinder portion 2 to the through hole 41 can be performed more reliably and easily. In addition, in this attachment / detachment work, a large-scale device such as a press-fit device for press-fitting the outer cylindrical portion 2 into the through hole 41 of the mounting object 4 is not required. As a result, the shaft portion 1, the rubber portion 3 and the outer cylinder portion 2 are easily integrated without vulcanization and bonding, and when the rubber portion 3 reaches the end of life, only the rubber portion 3 is replaced more easily. The shaft portion 1 and the outer cylinder portion 2 can be reused.

As mentioned above, although the assembly and disassembly method of the rubber bush 10 with a pin which concerns on this embodiment and the pin rubber bush which concerns on other embodiment was demonstrated in detail, this invention is not limited to this, The range which does not deviate from the meaning Various changes are possible. For example, in the present embodiment, the outer cylinder portion 2 of the rubber bush 10 with a pin is divided into three equal parts, but the present invention is not necessarily limited thereto. For example, even if divided into two equal parts or four equal parts or more Good.
Further, for example, in the present embodiment, although the rubber bush 10 with a pin is attached to the oil damper for a railway vehicle, the present invention is not necessarily limited thereto. For example, attaching to various links and shaft beams of a railway vehicle it can.

DESCRIPTION OF SYMBOLS 1 axial part 2, 2B, 2C outer cylinder part 3, 3B, 3C rubber part 4, 8 mounting object 5 engagement convex part 6 holding jig 7 pressurization jig 10, 10B, 10C rubber bush 11 with a pin bulging Portion 12 Coupling portion 21, 22, 23 Outer cylinder divided piece 24 Flanged cylindrical body 41 Through hole 53 Engagement recess 61, 62 Locking member 21B, 22B, 23B Outer cylinder divided piece 21C, 22C, 23C Outer cylinder divided piece 31B, 32B, 33B Plate-like rubber 31C, 32C, 33C Plate-like rubber 34B, 35B Pressing rubber portion (pressing member)
34C, 35C Pressing rubber part (pressing member)
211, 221, 231 shelf 212, 222, 232 outer peripheral surface 213, 223, 233 circumferential end 341C, 342C, 343C plate rubber 351C, 352C, 353C plate rubber 611, 621 claw 612, 622 base end

Claims (8)

Shaft portion, outer cylindrical portion disposed on the outer peripheral side of the shaft portion and mounted in the through hole of the mounting object, and substantially cylindrical, which is fitted between the shaft portion and the outer cylindrical portion and pre-compressed A rubber bushing with a pin and a rubber portion,
The outer cylinder portion is composed of a plurality of outer cylinder divided pieces divided in the circumferential direction, and an axial end of each outer cylinder divided piece receives a load for pre-compressing the rubber portion in the axial direction. A rubber bush with a pin, wherein the part is formed on the inner diameter side of the outer peripheral surface of the outer cylinder divided piece. In the rubber bush with pin described in claim 1,
An engaging convex portion and an engaging concave portion for resiliently engaging adjacent outer cylinder divided pieces are formed at circumferential end portions of the outer cylinder divided pieces, characterized in that a rubber with a pin is provided. bush. A rubber bush with a pin according to claim 1 or 2
The said rubber | gum part is a rubber bush with a pin characterized by laminating | stacking multiple plate-shaped rubbers in radial direction, and forming it. The rubber bush with pin according to any one of claims 1 to 3
A pressing member is formed on the shaft portion and a bulging portion bulging outward is formed, and a pressing member for pressing the rubber portion along the bulging portion between the outer cylindrical portion and the rubber portion A rubber bush with a pin that is inserted. In the rubber bush with pin described in claim 4,
The pin pressing rubber bush characterized in that the pressing member is formed by laminating a plurality of plate-like rubbers. In the rubber bush with pin described in claim 5,
A pinned rubber bush characterized in that a flanged cylindrical body is provided on the inner peripheral surface of the outer cylindrical portion for regulating the axial end edge of the plate-like rubber in the pressing member from the outside. A method for assembling and disassembling a pinbed rubber bush according to any one of claims 1 to 6,
And a holding jig for holding the load for pre-compressing the rubber portion in the axial direction by being locked to the shelf portion, and holding the outer cylindrical portion in a diameter-reduced state by the holding jig. A method of assembling and disassembling a pin-attached rubber bush, comprising attaching and detaching an outer cylindrical portion to a through hole of the object to be attached. A method for assembling and disassembling a pinbed rubber bush according to claim 7;
The holding jig includes a locking member having a claw portion that can be locked to the shelf portion, and a base end portion integrally formed with the claw portion and formed to be able to be fastened to the shaft portion. A method of assembling and disassembling a pinned rubber bush, wherein the outer cylinder portion is inserted into and removed from the through hole of the mounting object in a state where the locking member is fastened to the shaft portion.

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