JP2001038543A - Vibration-control bush manufacturing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a weakness from being imparted on a flange portion of an elastic body by axially moving a guide moving member at a return stroke while engaged with the elastic body. SOLUTION: When a second flange portion 52b is moved from the state that it is engaged with an inner surface of an outer cylinder 51 to a return direction, it is engaged with an outer cylinder engaging surface of a guide moving member. The second flange portion 52b engaged with the outer cylinder engaging surface moves a guide moving portion with own movement. The second flange portion 52b projected from a first end surface side of the outer cylinder 51 to the outside of the outer cylinder 51 is engaged with the outer cylinder engaging surface of the guide moving portion and a first end surface 51a of the outer cylinder 51. At this time, since a diameter of a guide surface of the guide moving member is larger than an outer diameter of the second flange portion 52b of the elastic pressure body 52, the second flange portion 52b of the elastic pressure body 52 is not deformed by the guide surface of the guide moving portion and a weakness is not imparted. A return force of an inner cylinder return rod 63 can be made smaller.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-vibration bushing manufacturing apparatus, and more particularly, to an anti-vibration bush used for a suspension arm, a stabilizer connecting rod, etc., having an outer cylinder and an outer diameter smaller than the inner diameter of the outer cylinder. An inner cylinder positioned in a coaxial relationship with the outer cylinder, and a pair of intermediate cylinders interposed between the outer cylinder and the inner cylinder and having an outer peripheral surface having a diameter larger than the inner diameter of the outer cylinder that protrudes outward in the axial direction of the inner cylinder. And an elastic body having a flange portion.

[0002]

2. Description of the Related Art A vibration isolating bush used for a suspension arm, a stabilizer connecting rod, or the like does not transmit vibration to the other of the outer cylinder and the inner cylinder via an elastic body when one of the outer cylinder and the inner cylinder receives vibration. Like that. Such an anti-vibration bush has an outer cylinder, an inner cylinder having an outer diameter smaller than the inner diameter of the outer cylinder, and being located in the outer cylinder in a coaxial relationship with the outer cylinder, and between the outer cylinder and the inner cylinder. And an elastic body having a pair of flange portions projecting outward in the axial direction of the inner cylinder and having an outer peripheral surface having a diameter larger than the inner diameter of the outer cylinder.

Conventionally, in the manufacture of a vibration-isolating bush provided with such an elastic body having a flange portion, a method of assembling an inner cylinder having an elastic body integrally joined to an outer surface in advance by press-fitting the inner cylinder into the outer cylinder is used. Have been.

The above-mentioned conventional method will be briefly described with reference to FIGS.

First, as shown in FIG. 6, an outer cylinder 11 is held by a first outer cylinder holding member 21 and a second outer cylinder holding member 22. At this time, the guide surface 22a of the second outer cylinder holding member 22
Is gradually reduced from the side into which the inner cylinder 13 having the elastic body 12 integrally joined to the outer surface is pressed into the side into which the outer cylinder 11 is engaged. The second outer cylinder holding member 22 and the inner cylinder guide portion 23 a of the inner cylinder return rod 23 allow the elastic body 12
Are integrally guided so as to be easily guided into the outer cylinder 11.

Next, the inner cylinder 13 having the elastic body 12 integrally joined to the outer surface is press-fitted to the position shown in FIG. 7 by the inner cylinder press-fit rod 24 so that the flange portion 12a of the elastic body 12 projects outside the outer cylinder 11. (Hereinafter, this process is referred to as a press-fitting process).

Next, the inner cylinder 13 having the elastic body 12 integrally joined to the outer surface is returned to the position shown in FIG. 8 by the inner cylinder return rod 23 such that the flange portion 12b of the elastic body 12 projects outside the outer cylinder 11. (Hereinafter, this process is referred to as a return process).

Finally, the vibration isolating bush 10 can be obtained by removing the second outer cylinder holding member 22 (see FIG. 9).

[0009]

However, in the above-described conventional method of manufacturing a vibration-proof bush, the second outer cylinder holding member 22 is formed by integrally joining the elastic body 12 to the outer surface by the guide surface 22a during the press-fitting process. The press-fitting of the cylinder 13 is facilitated, but in the return stroke, the flange 12b must move while contacting the guide surface 22a, and the inner cylinder return rod 23 moves the inner cylinder 13 having the elastic body 12 integrally joined to the outer surface. The force required for returning (hereinafter, simply referred to as the returning force) increases. When the return force is increased, it is opposed to a device capable of generating a return force, such as an actuator (not shown) for operating the inner cylinder return rod 23 or the second outer cylinder member 22 in the above-described conventional technique, or a return force. It is necessary to improve the performance of the device that presses the outer cylinder. Therefore, there is a problem that the equipment cost of the entire apparatus is increased.

In addition, from the return stroke, the second outer cylinder holding member 22
Until the flange portion 12b is removed, the flange portion 12b has a shape as shown in FIG. 8 on the second outer cylinder holding member 22, so that the flange portion 12b becomes hazy. For this reason, the vibration-isolating bush 10 may have a gap 10a between the flange portion 12b and the outer cylinder 11 as shown in FIG. 9. For example, water enters the vibration-isolating bush 10 from this gap, and rust occurs. There was a problem of doing it.

SUMMARY OF THE INVENTION It is an object of the present invention to manufacture an anti-vibration bush in which a flange of an elastic body has no habit at low cost.

[0012]

In order to solve the above problems, an apparatus for manufacturing a vibration isolating bush according to the present invention has an outer cylinder and an outer diameter smaller than the inner diameter of the outer cylinder. An elastic having a coaxial inner cylinder and a pair of flanges interposed between the outer cylinder and the inner cylinder, projecting outward in the axial direction of the inner cylinder and having an outer peripheral surface having a diameter larger than the inner diameter of the outer cylinder. And a vibration isolating bush that is manufactured by assembling a vibration isolating bush that prevents vibration from being transmitted to the other of the outer cylinder and the inner cylinder via the elastic body when one of the outer cylinder and the inner cylinder receives vibration. In the manufacturing apparatus, when the inner cylinder having the elastic body joined to the outer surface is press-fitted into the outer cylinder, the first flange portion of the elastic body is press-fitted into the outer cylinder from the first end face side of the outer cylinder, and the second cylinder of the outer cylinder is pressed. The second flange portion of the elastic body protrudes out of the outer cylinder from the end face side, and is pressed into the outer cylinder from the first end face side of the outer cylinder. An inner cylinder press-fitting means for press-fitting the inner cylinder to the press-fitting position in the axial direction so as to remain in the outer cylinder, and after press-fitting the inner cylinder having the elastic body bonded to the outer surface to the press-fitting position in the outer cylinder, An inner cylinder returning means for returning the inner cylinder to a return position in the axial direction so that the second flange portion protrudes out of the outer cylinder from the first end face side of the outer cylinder, so that the outer cylinder does not move in the press-fit direction of the inner cylinder. A first outer cylinder holding member that holds the outer cylinder, a second outer cylinder holding member that holds the outer cylinder so that the outer cylinder does not move in the return direction of the inner cylinder, and an inner cylinder having an elastic body joined to the outer surface. When press-fitting to the press-fitting position, the inner cylinder and the elastic body are guided into the outer cylinder, and when the inner cylinder having the elastic body joined to the outer surface is returned from the press-fitting position to the return position, the second flange portion of the elastic body has the outer cylinder. A cylindrical guide moving member that moves from the first end surface side to a position protruding outside the outer cylinder; A guide moving member guide surface for forming a hole having a diameter smaller than the outer diameter of the first end surface of the outer tube and larger than the inner diameter of the first end surface of the outer tube, and guiding the movement of the guide moving member, An outer cylinder first end surface engaging surface that is adjacent to the guide moving member guide surface and projects outward in the axial direction of the guide moving member guide surface to engage with the first end surface of the outer cylinder; An outer peripheral surface having a diameter larger than the inner diameter of the first end surface of the outer cylinder and smaller than the diameter of the guide moving member guide surface of the second outer cylinder holding member, and protruding axially inward of the outer peripheral surface adjacent to the outer peripheral surface. An outer cylinder engaging surface that engages with the first end surface of the outer cylinder, wherein the guide moving member maintains a coaxial relationship with a hole formed by the guide moving member guide surface of the second outer cylinder holding member. The guide moving portion when press-fitting the inner cylinder having an elastic body joined to the outer surface to the press-fitting position, The outer cylinder engagement surface of the material and the outer cylinder first end engagement surface of the second outer cylinder holding member are engaged with the first end surface of the outer cylinder, and the inner cylinder having an elastic body joined to the outer surface is placed in the press-fitting position. When returning from the return position to the return position, the guide moving member is engaged while the outer cylinder first end surface engaging surface of the second outer cylinder holding member is engaged with the first end surface of the outer cylinder and the guide moving member is engaged with an elastic body. It is characterized in that it is guided by the guide surface and moves in the axial direction thereof. This allows the guide moving member to move in the axial direction while engaging with the elastic body during the return stroke, thereby reducing the return force. Therefore, the equipment cost can be reduced, and the anti-vibration bush can be manufactured at low cost. Also,
By moving the guide moving member in the axial direction while engaging with the elastic body in the return stroke, it is possible to obtain a vibration-isolating bush in which the second flange portion of the elastic body has no habit.

According to a second aspect of the present invention, the inner diameter of the guide moving member is gradually reduced from one end to the other end. It is characterized by doing. This allows
In the press-fitting step, the press-fitting of the inner cylinder in which the elastic body is integrally joined to the outer surface can be facilitated. Therefore, the force (hereinafter simply referred to as “press-fit”) required for press-fitting the inner cylinder in which the elastic body is integrally joined to the outer surface by the inner cylinder press-fitting means into the outer cylinder can be reduced. It can be manufactured at low cost.

According to a third aspect of the present invention, in the vibration isolating bush manufacturing apparatus according to the first or second aspect, the inner diameter of the outer cylinder engaging surface of the guide moving member is smaller than that of the outer cylinder. It is smaller than the inner diameter of the first end face. Accordingly, when the second flange portion of the elastic body projects outside the outer cylinder from the first end face side of the outer cylinder in the return stroke, the second flange portion of the elastic body engages with the outer cylinder engagement surface of the guide moving member. Combine. Therefore, the elastic body can easily move the guide moving member, and the return force can be reduced, so that the vibration isolating bush can be manufactured at low cost.

According to a fourth aspect of the present invention, in the vibration isolating bush manufacturing apparatus according to any one of the first to third aspects, the diameter of the guide moving member guide surface is equal to the diameter of the elastic body. It is characterized by being larger than the outer diameter of the two flanges. Thereby, in the return stroke, when the elastic body moves the guide moving member and the second flange portion of the elastic body projects outside the outer cylinder from the first end surface side of the outer cylinder, the second flange portion of the elastic body moves to the second position. It does not engage with the guide moving member guide surface of the outer cylinder holding member. Therefore, it is possible to obtain a vibration-isolating bush in which the second flange portion of the elastic body is not deformed by the guide moving member guide surface and the second flange portion of the elastic body has no habit.

According to a fifth aspect of the present invention, there is provided an apparatus for manufacturing an anti-vibration bush according to any one of the first to fourth aspects, wherein the guide moving member has an opening at an outer peripheral surface thereof in an axial direction. A long groove is formed so as to extend by a predetermined length, and a stopper is screwed into the second outer cylinder holding member and has a distal end protruding from the guide moving member guide surface into the long groove. The guide moving member is regulated so as to be able to move by a predetermined distance in the axial direction with respect to the second outer cylinder holding member. Thereby, since the guide moving member and the second outer cylinder holding member can be formed as an integral structure, when the second outer cylinder holding member is engaged with and separated from the outer cylinder, the guide moving member also engages with the outer cylinder. And can be separated. Therefore, the number of manufacturing steps can be reduced, and the anti-vibration bush can be manufactured at low cost.

[0017]

Preferred embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 4 are sectional views showing an embodiment of a vibration-isolating bush manufacturing apparatus according to the present invention. FIGS. 1, 2, 3 and 4 show a vibration-isolating bush before assembly. , The state after the press-in stroke, the state after the return stroke, and the state after the vibration isolating bush is assembled. FIG. 5 is a partially enlarged cross-sectional view near the outer cylinder according to the present embodiment.

First, the configuration will be described.

1 to 5, reference numeral 51 denotes an outer cylinder.
It has a first end face 51a and a second end face 51b. 53
Is an inner cylinder having an outer diameter smaller than the inner diameter of the outer cylinder 51,
It has a first end face 53a and a second end face 53b. 52
Is an elastic body interposed between the outer cylinder 51 and the inner cylinder 53 and having a pair of flange portions 52a and 52b projecting outward in the axial direction of the inner cylinder 53 and having an outer peripheral surface having a diameter larger than the inner diameter of the outer cylinder 51. The elastic body 52 is made of a flexible material such as rubber, and the elastic body 52 is joined to the outer surface of the inner cylinder 53 by vulcanization molding. 50 is an outer cylinder 51, an elastic body 5
2 and the inner cylinder 53. The anti-vibration bush 50 is the other of the outer cylinder 51 and the inner cylinder 53 via the elastic body 52 when one of the outer cylinder 51 and the inner cylinder 53 receives vibration. To prevent vibration from being transmitted. Reference numeral 61 denotes a first outer cylinder holding member that holds the outer cylinder 51 so that the outer cylinder 51 does not move in the press-fit direction of the inner cylinder 53, and a second end surface 51b of the outer cylinder 51.
Outer cylinder second end face engagement surface 61a and tapered portion 61
b. Reference numeral 62 denotes a second outer cylinder holding member that holds the outer cylinder 51 so that the outer cylinder 51 does not move in the returning direction of the inner cylinder 53. The second outer cylinder holding member 62 engages with the first end face 51 a of the outer cylinder 51. The mating surface 62a, the tapered portions 62b and 62c, the load receiving surface 62d which receives a load from outside to press the first outer cylinder holding member 61 and the second outer cylinder holding member 62, and the guide moving member 65 are engaged and guided. It has a guide moving member guide surface 62e for guiding the moving member 65 in the axial direction. Reference numeral 63 denotes an inner cylinder return rod serving as inner cylinder return means, and an inner cylinder guide 63 for guiding the inner cylinder 53 so that the inner cylinder 53 moves in the axial direction.
a and an inner cylinder engaging surface 63b that engages with the inner cylinder 53 in the return stroke. Reference numeral 64 denotes an inner cylinder press-fit rod which is an inner cylinder press-fit means. 65 is an inner cylinder 5 having an elastic body 52 bonded to the outer surface.
3 and the elastic body 52 when press-fitting to the press-fitting position.
Is a guide moving member that moves in the axial direction when returning the inner cylinder 53 having the elastic body 52 joined to the outer surface to the return position, and an outer cylinder engaging surface 65 that engages with the outer cylinder 51.
a, an outer peripheral surface 65b engaged with the second outer cylinder holding member 62, a long groove portion 65c opened on the outer peripheral surface 65b, and a tapered portion 65
d. Reference numeral 66 denotes a stopper that controls the amount of movement of the guide moving member 65 by integrally forming the second outer cylinder holding member 62 and the guide moving member 65.

Since the diameter of the outer peripheral surface 65b is smaller than the diameter of the guide moving member guide surface 62e, the guide moving member 65 is guided by the guide moving member guide surface 62e and can move in the axial direction.

Next, the operation will be described. (Especially, see FIG. 5 for the main part near the outer cylinder 51.)

First, the preparation of the vibration isolating bush before assembly will be described.

First, when the outer tube 51 is inserted into the hole formed by the tapered portion 61b of the first outer tube holding member 61, the outer tube 51 is guided by the tapered portion 61b, and the second end surface 51b is moved to the outer tube. It engages with the two end face engagement surface 61a. Next, when the second outer cylinder holding member 62 is put on the outer cylinder 51 engaged with the outer cylinder second end face engaging surface 61a, the outer cylinder 51 is guided by the tapered portion 62b, and the first end face 51a is The first end surface engages with the engagement surface 62a. At this time, the guide moving member 65 is
As a result, the first end surface 51a also engages with the outer cylinder engaging surface 65a.
Further, the second outer cylinder holding member 62 receives a load perpendicular to the load receiving surface 62d by a load means (not shown) on the load receiving surface 62d,
Due to this load, the second outer cylinder holding member 62 is pressed against the first outer cylinder holding member 61. Therefore, the outer cylinder 51 is engaged and held by the first outer cylinder holding member 61 and the second outer cylinder holding member 62 as shown in FIG.

In a state where the outer cylinder 51 is engaged and held by the first outer cylinder holding member 61 and the second outer cylinder holding member 62 as shown in FIG. 1, an elastic body 52 is integrally joined to the outer surface. When the tube 53 is inserted into the second outer tube holding member 62, the inner tube 5
3 is guided by the tapered portion 62c, and the first flange portion 52a
Are engaged with the guide moving member 65. At this time, the inner cylinder guide 63a is inserted into a hole formed by the inner surface of the inner cylinder 53. Further, the inner cylinder press-fit rod 64 is connected to the second end face 5 of the inner cylinder 53.
3b. Therefore, the inner cylinder 53 in which the elastic body 52 is integrally joined to the outer surface is arranged at a position as shown in FIG.

Next, the press-in process will be described.

In the press-in process, the inner cylinder press-in rod 64 is moved in the axial direction toward the inner cylinder return rod 63 by an actuator (not shown), and the inner cylinder press-in rod 64 moves the inner cylinder 53 in FIG. Press in to the indicated press-in position. At this time, the inner cylinder guide 63a is
The inner cylinder 53 having the elastic body 52 integrally joined to the outer surface by the inner cylinder guide 63a is guided by the inner cylinder guide portion 63a and is coaxially maintained with the outer cylinder 51 in the axial direction. You can move. In addition, the guide moving member 65
Since the diameter of the tapered portion 65d gradually decreases from one end side to the other end side, the outer diameter of the elastic body 52 gradually decreases as the elastic body 52 is press-fitted. The inner cylinder 53 in which the elastic body 52 is integrally joined to the outer surface by 65d can be easily guided inside the outer cylinder 51.

In this press-in process, the first flange portion 52a is guided by the tapered portion 65d and
The outer cylinder 51 is pressed into the outer cylinder 51 from the side 1a, moves while engaging with the inner surface of the outer cylinder 51, and projects outside the outer cylinder 51 from the second end face 51b side of the outer cylinder 51. Similarly to the first flange portion 52a, the second flange portion 52b is guided by the tapered portion 65d, is pressed into the outer cylinder 51 from the first end surface 51a side of the outer cylinder 51, and engages with the inner surface of the outer cylinder 51. Although it moves, it remains in the outer cylinder 51 even after the press-fitting stroke is completed. The first end surface 53a of the inner cylinder 53 is provided on the inner cylinder engaging surface 63 of the inner cylinder return rod 63.
b.

Next, the return process will be described.

First, from the state after the press-in stroke shown in FIG.
The inner cylinder press-fit rod 64 is moved in the axial direction by an actuator (not shown) in a direction away from the second end face 53 b of the inner cylinder 53. Next, the inner cylinder return rod 63 is moved in the axial direction toward the inner cylinder press-fit rod 64 by an actuator (not shown), and the inner cylinder return rod 63 moves the inner cylinder 53 to the return position shown in FIG. Return to At this time, the inner cylinder guide 63a is inserted into a hole formed by the inner surface of the inner cylinder 53, and the inner cylinder 53 having the elastic body 52 integrally joined to the outer surface is guided by the inner cylinder guide 63a. 51 can be moved in the axial direction while maintaining a coaxial relationship. At this time, a hole having a diameter smaller than the outer diameter of the first end face 51a of the outer cylinder 51 and larger than the inner diameter of the first end face 51a of the outer cylinder 51 is formed by the guide moving member guide surface 62e. The inner diameter of the outer cylinder first end surface engaging surface 62a which is adjacent to the surface 62e and projects outward in the axial direction of the guide moving member guide surface 62e is also smaller than the outer diameter of the first end surface 51a of the outer cylinder 51. End face 51
Since the outer cylinder 51 is larger than the inner diameter of the outer cylinder 51a, the outer cylinder 51 does not move in the return direction due to the outer cylinder first end surface engaging surface 62a. Further, since the inner diameter of the outer cylinder engaging surface 65a of the guide moving member 65 is smaller than the inner diameter of the first end surface 51a of the outer cylinder 51, the second flange portion 52b is returned from the state of being engaged with the inner surface of the outer cylinder 51 in the returning direction. When it moves, it engages with the outer cylinder engaging surface 65a of the guide moving member 65. Further, the second flange portion 52b engaged with the outer cylinder engagement surface 65a
Moves the guide moving member 65 together with its own movement. Therefore, the second flange portion 52b protruding from the first end surface side of the outer cylinder 51 to the outside of the outer cylinder 51 is engaged with the outer cylinder engagement surface 65a of the guide moving member 65 and the first end surface 51a of the outer cylinder 51 ( (See FIG. 3). At this time, since the diameter of the guide moving member guide surface 62e is larger than the outer diameter of the second flange portion 52b of the elastic member 52, the second flange portion 52b of the elastic member 52 may be deformed by the guide moving member guide surface 62e. There is no habit. Further, the return force of the inner cylinder return rod 63 can be made smaller than before.

In the return stroke, the second flange portion 52b projects out of the outer cylinder 51 from the first end surface side of the outer cylinder 51 and is brought into contact with the outer cylinder engaging surface 65a of the guide moving member 65 and the first end surface of the outer cylinder 51. Engage. Further, the first flange portion 52a moves in the axial direction toward the inner cylinder press-fit rod 64, and the first flange portion 52a moves.
a engages with the second end surface of the outer cylinder 51.

Finally, the second outer cylinder holding member 62 integrally formed with the guide moving member 65 is removed by the stopper 66 (see FIG. 4), and the vibration-proof bushing 50 whose flange portion of the elastic body has no habit is formed. Is taken out.

In this embodiment, as a means for pressing the first outer cylinder holding member 61 and the second outer cylinder holding member 62 against each other, a load is applied to the load receiving surface 62d by a load means (not shown). Outer cylinder holding member 61 and second outer cylinder holding member 62
Any other means may be used as long as they press against each other.

[0034]

According to the present invention, it is possible to obtain an anti-vibration bush in which the flange of the elastic body has no habit.
Further, a vibration-isolating bush in which the flange portion of the elastic body has no habit can be manufactured at low cost.

[Brief description of the drawings]

FIG. 1 is a sectional view of an anti-vibration bush manufacturing apparatus according to an embodiment of the present invention, showing a state before an anti-vibration bush is assembled.

FIG. 2 is a cross-sectional view of the vibration-isolating bush manufacturing apparatus according to one embodiment of the present invention, showing a state after a press-fitting stroke.

FIG. 3 is a cross-sectional view of the vibration-isolating bush manufacturing apparatus according to one embodiment of the present invention, showing a state after a return stroke.

FIG. 4 is a cross-sectional view of the vibration-isolating bush manufacturing apparatus according to one embodiment of the present invention, showing a state after the vibration-isolating bush is assembled.

FIG. 5 is a partially enlarged cross-sectional view near the outer cylinder according to the embodiment.

FIG. 6 is a cross-sectional view of a conventional vibration-isolating bush manufacturing apparatus,
This shows the state before assembling the anti-vibration bush.

FIG. 7 is a cross-sectional view of a conventional vibration-isolating bush manufacturing apparatus,
This shows the state after the press-in process.

FIG. 8 is a cross-sectional view of a conventional vibration-isolating bush manufacturing apparatus,
This shows the state after the return stroke.

FIG. 9 is a cross-sectional view of a conventional vibration-isolating bush manufacturing apparatus,
This shows a state after the vibration isolating bush is assembled.

[Explanation of symbols]

 50 Vibration-proof bush 51 Outer cylinder 51a First end face 51b Second end face 52 Elastic body 52a First flange part 52b Second flange part 53 Inner cylinder 61 First outer cylinder holding member 62 Second outer cylinder holding member 62a Outer cylinder first End surface engaging surface 62e Guide moving member guide surface 63 Inner cylinder return rod (inner cylinder return means) 64 Inner cylinder press-fit rod (inner cylinder press-fit means) 65 Guide moving member 65a Outer cylinder engaging surface 65b Outer peripheral surface 65c Long groove 65d Taper Part 66 Stopper

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Yoshiaki Shimizu 283 Familiarity, Rhythm Co., Ltd., 283, Obimachi, Hamamatsu City, Shizuoka Prefecture (Reference) 3C030 BB05 BB12 BC11 BC19 BC21 3J048 AA01 BA19 EA17 3J059 AD05 BA42 EA14 GA04 GA05

Claims (5)

[Claims] An outer cylinder having an outer diameter smaller than the inner diameter of the outer cylinder, wherein the inner cylinder is located within the outer cylinder while maintaining a coaxial relationship with the outer cylinder;
An elastic body interposed between the outer cylinder and the inner cylinder, having an elastic body having a pair of flange portions having an outer peripheral surface having a diameter larger than the inner diameter of the outer cylinder, protruding outward in the axial direction of the inner cylinder, and In a vibration isolating bush manufacturing apparatus for assembling and manufacturing a vibration isolating bush that prevents vibration from being transmitted to the other of the outer cylinder and the inner cylinder via the elastic body when one receives vibration, the elastic body is joined to the outer surface. When press-fitting the cylinder into the outer cylinder,
The first flange portion of the elastic body is pressed into the outer cylinder from the first end face side of the outer cylinder and protrudes out of the outer cylinder from the second end face side of the outer cylinder, and the second flange portion of the elastic body is the first flange portion of the outer cylinder. An inner cylinder press-fitting means for press-fitting the inner cylinder to the press-fit position in the axial direction so that the inner cylinder is press-fitted into the outer cylinder from the end face side and remains in the outer cylinder. After press-fitting to the press-fitting position, the inner cylinder returning means for returning the inner cylinder to the axially returning position so that the second flange portion of the elastic body projects outside the outer cylinder from the first end face side of the outer cylinder, A first outer cylinder holding member that holds the outer cylinder so as not to move in the press-fit direction of the inner cylinder; a second outer cylinder holding member that holds the outer cylinder so that the outer cylinder does not move in the returning direction of the inner cylinder; The inner cylinder and the elastic body were guided into the outer cylinder when the inner cylinder having the elastic body joined thereto was press-fitted to the press-fitting position, and the elastic body was joined to the outer surface. When returning the inner cylinder from the press-fitting position to the return position, a cylindrical guide moving member that moves to a position where the second flange portion of the elastic body projects from the first end surface side of the outer cylinder to the outside of the outer cylinder, A guide moving member for forming a hole having a diameter smaller than the outer diameter of the first end face of the outer cylinder and larger than the inner diameter of the first end face of the outer cylinder, and guiding the movement of the guide moving member; A guide surface, and an outer cylinder first end surface engaging surface that is adjacent to the guide moving member guide surface and projects outward in the axial direction of the guide moving member guide surface and engages with the first end surface of the outer cylinder. The guide moving member has an outer peripheral surface having a diameter larger than the inner diameter of the first end surface of the outer cylinder and smaller than the diameter of the guide moving member guide surface of the second outer cylinder holding member, and an axial direction of the outer peripheral surface adjacent to the outer peripheral surface. An outer cylinder engaging surface that protrudes inward and engages with the first end surface of the outer cylinder; The material is disposed so as to maintain a coaxial relationship with a hole formed by the guide moving member guide surface of the second outer cylinder holding member, and the guide is provided when the inner cylinder having an elastic body bonded to the outer surface is press-fitted to the press-fitting position. The inner cylinder having the outer cylinder engaging surface of the moving member and the outer cylinder first end surface engaging surface of the second outer cylinder holding member engaged with the first end surface of the outer cylinder, and the inner cylinder having an elastic body joined to the outer surface is press-fitted. When returning from the position to the return position, the outer cylinder first end surface engaging surface of the second outer cylinder holding member is engaged with the first end surface of the outer cylinder, and the guide moving member is engaged with the elastic body while the guide movement is being performed. An anti-vibration bush manufacturing apparatus characterized in that it is guided by a member guide surface and moves in the axial direction thereof. 2. The vibration isolating bush manufacturing apparatus according to claim 1, wherein an inner diameter of the guide moving member is gradually reduced from one end to the other end. 3. The vibration isolating bush manufacturing apparatus according to claim 1, wherein an inner diameter of an outer cylinder engaging surface of the guide moving member is smaller than an inner diameter of a first end surface of the outer cylinder. 4. The vibration isolating bush manufacturing apparatus according to claim 1, wherein a diameter of the guide moving member guide surface is larger than an outer diameter of the second flange portion of the elastic body. 5. An elongated groove is formed in the guide moving member so as to be open at the outer peripheral surface thereof and extend a predetermined length in the axial direction thereof, and the guide moving member is screwed into the second outer cylinder holding member and the tip end thereof is provided with the guide. A stopper protruding from the guide surface of the moving member into the long groove is provided, and the stopper restricts the guide moving member so as to be able to move a predetermined distance in the axial direction with respect to the second outer cylinder holding member. The anti-vibration bush manufacturing apparatus according to any one of claims 1 to 4.