JPH0921444A - Vibration control mount - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration control mount, which shows the predetermined vibration control function and which can prevent the inclination and eccentricity of a body 55 to be supported due to the dead weight of the body 55 to be supported itself. SOLUTION: This vibration control mount is provided with an elastic body 1, which is provided with a through hole 1a, and a pair of plates 2, 3, which are connected to both end surfaces 1b, 1c of the elastic body 1 and arranged in nearly parallel with each other and provided with through holes 2a, 3a passing through the through hole 1a of the elastic body 1, and one plate 2 is connected to a supporting body 54 side, and the other plate 3 is connected to the body 55 to be supported side so as to elastically support the body 55 to be supported. The inner peripheral side or the outer peripheral side of the elastic body 1 is provided with a ring 4 freely to be slid, which maintains the pair of plates 2, 3, nearly parallel.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antivibration mount related to antivibration technology.

[0002]

2. Description of the Related Art Conventionally, a vibration isolation mount shown in FIGS. 5 and 6 has been known as an anti-vibration mount for elastically supporting a stepping motor of home electric appliances or OA equipment.

That is, this antivibration mount has a through hole 5
An elastic body 51 made of a rubber-like elastic material provided with 1a and a through hole 52a connected to both end surfaces 51b and 51c of the elastic body 51 and arranged substantially parallel to each other and communicating with the through hole 51a of the elastic body 51. , 53a provided with a pair of metal plates 52 and 53, respectively, and one plate 52 is connected to a frame 54 of a device which is a support, and the other plate 53 is a supported stepping motor. This stepping motor 5 connected to 55
5 is elastically supported. The shaft 56 protruding in the lateral direction of the stepping motor 55 has the through holes 51a, 52a, 5a.
3a and a through hole 54a provided in the frame 54, and the tip thereof is connected to a torque transmission portion 57 having a plurality of gears 58, 59 and the like. Further, as shown in FIG. 6, the pair of plates 52, 53 each have an outer peripheral shape formed in a substantially rhombic shape (the corners are rounded) and are arranged so as to be displaced from each other by 90 degrees.

The antivibration mount having the above structure is devised to effectively absorb and suppress the vibration generated in the stepping motor 55 by utilizing the elasticity of the elastic body 51. However, the antivibration mount in the rotational direction of the stepping motor 55 is prevented. In order to effectively perform the vibration, it is necessary to reduce the torsional rigidity (spring constant) of the elastic body 51 as much as possible. However, when the torsional rigidity of the elastic body 51 is reduced in the vibration-proof mount having the above-described configuration, the spring constant of the elastic body 51 in the radial direction (shear direction) is also reduced, so that the stepping motor 55 tilts due to its own weight. The shaft 56 along with this
May tilt (the direction of arrow B in FIG. 5), causing problems such as gear jumps in the gears 58 and 59.

[0005]

SUMMARY OF THE INVENTION In view of the above points, the present invention has a function of exhibiting a predetermined vibration isolation function and a function of preventing a supported body such as a stepping motor from being tilted or eccentric due to its own weight. An object is to provide an anti-vibration mount having the same.

[0006]

In order to achieve the above object, a vibration-proof mount according to the present invention is connected to an elastic body made of a rubber-like elastic material having a through hole and both end surfaces of the elastic body, respectively. A pair of plates arranged substantially parallel to each other and each provided with a through hole communicating with the through hole, wherein one of the plates is connected to a support side and the other plate is connected to a supported body side. An anti-vibration mount for elastically supporting a supported body, wherein a ring for maintaining that the pair of plates is substantially parallel to each other is slidably provided on an inner peripheral side or an outer peripheral side of the elastic body. I chose

[0007]

When the ring for maintaining the pair of plates substantially parallel to each other is provided on the inner peripheral side or the outer peripheral side of the elastic body, like the vibration-proof mount of the present invention having the above-mentioned structure, Since this ring acts as a kind of spacer, it becomes possible to prevent the supported body from being inclined or eccentric due to its own weight. Further, since the ring is slidably provided, the antivibration function of the antivibration mount is not impaired.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION

Next, an embodiment of the present invention will be described with reference to the drawings.

First Embodiment: As shown in FIG. 1, a vibration isolation mount according to the first embodiment is an inner peripheral side of an elastic body 1 made of a rubber-like elastic material and is a support body of an apparatus. Frame 54
A ring 4 is slidably provided as a fourth part following the elastic body 1 and the pair of plates 2 and 3 between the stepping motor 55 and the supported body, and more specifically, , Has the following configuration.

That is, first, there is an elastic body 1 made of a rubber-like elastic material having a predetermined thickness, and a through hole 1a opened in a substantially circular shape is provided at the center of the elastic body 1. Metal plates 2 and 3 each having a larger outer diameter than the elastic body 1 are connected to both end surfaces 1b and 1c (vulcanization adhesion).
Have been. The pair of plates 2 and 3 are configured such that both end surfaces 1b and 1c of the elastic body 1 are substantially parallel to each other,
Through holes 2a, 3a, which are arranged substantially parallel to each other and which are open to substantially the same shape and size and which communicate with the through hole 1a of the elastic body 1, are provided in the pair of plates 2, 3, respectively. The inner diameter of the elastic body 1 and the inner diameter of the pair of plates 2 and 3 are set to be larger than the inner diameter of the through hole 54a provided in the frame 54. Further, the pair of plates 2 and 3 each have an outer peripheral shape that is formed into a substantially rhombic shape (the corners are rounded), and the plates 9 and 9
It is arranged with a displacement of 0 degree, and as shown in the drawing, one plate 2 is connected (bolted) to the frame 54 and the other plate 3 is connected to the stepping motor 5
5 (bolt-fastened), so that the vibration-proof mount elastically supports the stepping motor 55 sideways (substantially horizontally). A shaft 56 protruding in the lateral direction of the stepping motor 55 is inserted into the through holes 1a, 2a, 3a, 54a, and at the tip thereof, a torque transmission portion 57 having a plurality of gears 58, 59 and the like.
It is connected to the.

The frame 54 and the stepping motor 55 are located on the inner peripheral side of the elastic body 1 and the pair of plates 2 and 3.
A substantially cylindrical ring 4 that keeps the pair of plates 2 and 3 substantially parallel to each other is slidably interposed between and.

The axial length of the ring 4 is the frame 5
4 and the stepping motor 55, that is, the sum of the thickness of the plate 2, the thickness of the elastic body 1 and the thickness of the plate 3 is set to be substantially equal to or slightly smaller than this sum, whereby one of the rings 4 is A gap (not shown) is formed between the axial end surface 4a and the frame 54 and between the other axial end surface 4b and the stepping motor 55, whereby the ring 4 is formed with respect to the frame 54 and the stepping motor 55. Each slides smoothly. Whether the outer diameter of the ring 4 is substantially the same as the inner diameter of the elastic body 1 and the pair of plates 2 and 3,
Alternatively, it is set to be slightly smaller than these, and thereby a fitting gap (not shown) is formed between the outer peripheral surface 4c of the ring 4 and the elastic body 1 and the pair of plates 2 and 3, whereby the ring 4 is elastic. The body 1 and the pair of plates 2 and 3 are slid smoothly. The inner diameter of the ring 4 is set to be substantially the same as the inner diameter of the through hole 54a of the frame 54.

As shown in the figure, the anti-vibration mount having the above structure is interposed between the frame 54 and the stepping motor 55 to laterally and elastically support the stepping motor 55. The elasticity effectively absorbs and suppresses the vibration generated in the stepping motor 55.

Further, if the torsional rigidity (spring constant) of the elastic body 1 is set to be small in order to enhance the vibration damping effect, the spring constant in the radial direction (shear direction) of the elastic body 1 is reduced accordingly, and stepping is performed. The motor 55 tends to tilt in the direction of the arrow due to its own weight, but since the ring 4 interposed between the frame 54 and the stepping motor 55 acts as a kind of spacer or "replacement rod", the stepping motor 55 Is prevented from tilting. Therefore, it is possible to prevent problems such as gear jumps of the gears 58 and 59 from occurring due to this inclination. In this sense,
It is possible to provide a mount product that exhibits excellent performance.

Furthermore, since the ring 4 is slidably arranged with respect to the frame 54, the stepping motor 55, the elastic body 1 and the pair of plates 2 and 3, the ring 4 is provided. Therefore, the antivibration function of the antivibration mount is not impaired. Therefore, the elastic body 1
Since the small setting of the torsional rigidity (spring constant) is effectively utilized, it is possible to provide a mount product exhibiting excellent vibration damping performance.

The ring 4 is made of metal or resin. If the sliding resistance is too large and this poses a problem, the ring 4 should be replaced with a low friction material such as a dry bearing (Oiltron or Rare Freon). It is a good idea to mold by. There are also solutions to increase the contact surface pressure.

Second Embodiment: As shown in FIG. 2, the vibration proof mount according to the second embodiment is an inner peripheral side of the elastic body 1 made of a rubber-like elastic material and is a support body of a device. Frame 54
A ring 4 is slidably provided as a fourth part following the elastic body 1 and the pair of plates 2 and 3 between the stepping motor 55 and the supported body, and more specifically, , Has the following configuration.

That is, first, there is an elastic body 1 made of a rubber-like elastic material having a predetermined thickness, and a through hole 1a opened in a substantially circular shape is provided at the center of the elastic body 1. Metal plates 2 and 3 each having a larger outer diameter than the elastic body 1 are connected to both end surfaces 1b and 1c (vulcanization adhesion).
Have been. The pair of plates 2 and 3 are configured such that both end surfaces 1b and 1c of the elastic body 1 are substantially parallel to each other,
Through holes 2a and 3a, which are arranged substantially parallel to each other and communicate with the through hole 1a of the elastic body 1, are provided in the pair of plates 2 and 3, respectively. The inner diameters of the pair of plates 2 and 3 are set to be smaller than the inner diameter of the elastic body 1, and the through holes 5 provided in the frame 54 are provided.
It is set larger than the inner diameter of 4a. Further, the pair of plates 2 and 3 each have an outer peripheral shape formed into a substantially rhombic shape (the corners are rounded) and are arranged so as to be displaced by 90 degrees from each other. Is connected (bolted) to the frame 54 and the other plate 3 is connected (bolted) to the stepping motor 55, whereby the vibration-proof mount elastically moves the stepping motor 55 sideways (substantially horizontally) and elastically. It is supposed to support. The shaft 56 protruding in the lateral direction of the stepping motor 55 has a through hole 1a,
It is inserted through 2a, 3a, 54a, and is connected at its tip to a torque transmission portion 57 having a plurality of gears 58, 59 and the like.

The frame 54 and the stepping motor 55 are on the inner peripheral side of the elastic body 1 and the pair of plates 2 and 3.
A substantially cylindrical ring 4 that keeps the pair of plates 2 and 3 substantially parallel to each other is slidably interposed between and. Further, a pair of plates 2 and 3 on the inner peripheral side of the elastic body 1 are provided at the substantially center of the outer peripheral surface 4c of the ring 4 in the axial direction.
An engaging portion 4d for retaining that is arranged between the two and has an annular shape and engages with the plates 2 and 3 in the axial direction. The engaging portion 4d is a kind of protrusion.

The axial length of the ring 4 is approximately the same as the distance between the frame 54 and the stepping motor 55, that is, the sum of the thickness of the plate 2, the thickness of the elastic body 1 and the thickness of the plate 3, or this sum. It is set to be slightly smaller, so that one axial end surface 4a of the ring 4 and the frame 54
And a gap (not shown) is formed between the other axial end surface 4b and the stepping motor 55, respectively.
As a result, the ring 4 slides smoothly with respect to the frame 54 and the stepping motor 55. Further, the axial length of the engaging portion 4d of the ring 4 is
The distance between the pair of plates 2 and 3, that is, the thickness of the elastic body 1 is set to be approximately the same or slightly smaller than this, whereby a gap (not shown) is formed between the engaging portion 4d and each of the plates 2 and 3. ) Is formed, whereby the engaging portion 4
d is adapted to slide smoothly on the plates 2 and 3. A rounded or rounded taper having a predetermined shape is provided at each end of the engaging portion 4d in the axial direction so as not to damage the elastic body 1.

The outer diameter of the outer peripheral surface 4c of the ring 4 is set to be substantially the same as or slightly smaller than the inner diameter of each of the plates 2 and 3, whereby the outer peripheral surface 4c of the ring 4 and each of the plates 2 and 3 are set. A fitting gap (not shown) is formed between the plates 4 and 3, so that the ring 4 slides smoothly with respect to the plates 2 and 3. The outer diameter of the engaging portion 4d of the ring 4 is determined by the elastic body 1
Is set to be approximately the same as or slightly smaller than the inner diameter of the engaging portion 4d, thereby forming a fitting gap (not shown) between the engaging portion 4d and the elastic body 1, and thereby the engaging portion 4
d is adapted to slide smoothly on the elastic body 1. The inner diameter of the ring 4 is set to be substantially the same as the inner diameter of the through hole 54a of the frame 54.

As shown in the figure, the anti-vibration mount having the above-mentioned structure is interposed between the frame 54 and the stepping motor 55 to laterally and elastically support the stepping motor 55. The elasticity effectively absorbs and suppresses the vibration generated in the stepping motor 55.

If the torsional rigidity (spring constant) of the elastic body 1 is set to be small in order to enhance the vibration damping effect, the spring constant in the radial direction (shear direction) of the elastic body 1 is reduced accordingly, and stepping is performed. The motor 55 tends to tilt in the direction of the arrow due to its own weight, but since the ring 4 interposed between the frame 54 and the stepping motor 55 acts as a kind of spacer or "replacement rod", the stepping motor 55 Is prevented from tilting. Therefore, it is possible to prevent problems such as gear jumps of the gears 58 and 59 from occurring due to this inclination. In this sense,
It is possible to provide a mount product that exhibits excellent performance.

The ring 4 includes a frame 54, a stepping motor 55, an elastic body 1 and a pair of plates 2 and 3.
Since they are slidably arranged with respect to each other, even if the ring 4 is provided, the vibration damping function of the vibration damping mount is not impaired. Therefore, since the torsional rigidity (spring constant) of the elastic body 1 is set small, the mount product exhibiting excellent vibration damping performance can be provided.

Furthermore, since the ring 4 is provided with the engaging portion 4d so that the ring 4 does not come off from the vulcanized molded article composed of the elastic body 1 and the pair of plates 2 and 3, the ring 4 is not removed. It is possible to prevent forgetting to attach 4 and improve workability of attachment.

The ring 4 is made of metal or resin. If the sliding resistance is too large and this poses a problem, the ring 4 should be replaced with a low friction material such as a dry bearing (Oiltron or Rare Freon). It is a good idea to mold by. There are also solutions to increase the contact surface pressure.

Third Embodiment: As shown in FIG. 3, the vibration proof mount according to the third embodiment has a pair of plates 2 and 3 on the inner peripheral side of an elastic body 1 made of a rubber-like elastic material. A ring 4 is slidably provided between the elastic body 1 and the pair of plates 2 and 3 as a fourth component, and more specifically has the following configuration.

That is, first, there is an elastic body 1 made of a rubber-like elastic material having a predetermined thickness, and a through hole 1a opened in a substantially circular shape is provided at the center of the elastic body 1. Metal plates 2 and 3 each having a larger outer diameter than the elastic body 1 are connected to both end surfaces 1b and 1c (vulcanization adhesion).
Have been. The pair of plates 2 and 3 are configured such that both end surfaces 1b and 1c of the elastic body 1 are substantially parallel to each other,
Through holes 2a and 3a, which are arranged substantially parallel to each other and communicate with the through hole 1a of the elastic body 1, are provided in the pair of plates 2 and 3, respectively. The inner diameters of the pair of plates 2 and 3 are set to be smaller than the inner diameter of the elastic body 1, and the through holes 5 provided in the frame 54 are provided.
It is set to be substantially the same as the inner diameter of 4a. Further, the pair of plates 2 and 3 each have an outer peripheral shape formed into a substantially rhombic shape (the corners are rounded) and are arranged so as to be displaced by 90 degrees from each other. Is connected (bolted) to the frame 54 of the device which is a support, and the other plate 3 is connected (bolted) to a stepping motor 55 which is a supported body, whereby the vibration-proof mount mounts the stepping motor 55. It is designed to be supported laterally (almost horizontally) and elastically. The shaft 56 protruding in the lateral direction of the stepping motor 55 is provided with the through holes 1a, 2a, 3a, 5
4a, and a plurality of gears 58,
It is connected to the torque transmission unit 57 including 59 and the like.

A substantially cylindrical ring 4 that keeps the pair of plates 2 and 3 substantially parallel to each other is slidable between the pair of plates 2 and 3 on the inner peripheral side of the elastic body 1. It is installed.

The axial length of the ring 4 is set to be approximately equal to or slightly smaller than the distance between the pair of plates 2 and 3, that is, the thickness of the elastic body 1, whereby the axial direction of the ring 4 is determined. A gap (not shown) is formed between the end surface 4a and the one plate 2 and between the other axial end surface 4b and the other plate 3, respectively, whereby the ring 4 is formed with respect to each plate 2, 3. It is designed to slide smoothly. The outer diameter of this ring 4 is
The inner diameter of the elastic body 1 is set to be substantially the same as or slightly smaller than the inner diameter of the elastic body 1, so that a fitting gap (not shown) is formed between the outer peripheral surface 4c of the ring 4 and the elastic body 1. 4 smoothly slides on the elastic body 1. In order not to damage the elastic body 1, the outer peripheral surface 4c of the ring 4 is axially end-shaped.
It has a predetermined roundness or taper. Further, the inner diameter of the ring 4 is determined by the pair of plates 2 and 3
And the inner diameter of the through hole 54a of the frame 54 are set to be substantially the same.

As shown in the figure, the anti-vibration mount having the above structure is interposed between the frame 54 and the stepping motor 55 to laterally and elastically support the stepping motor 55. The elasticity effectively absorbs and suppresses the vibration generated in the stepping motor 55.

If the torsional rigidity (spring constant) of the elastic body 1 is set to be small in order to enhance the vibration damping effect, the spring constant in the radial direction (shear direction) of the elastic body 1 is reduced accordingly, and stepping is performed. The motor 55 tends to tilt in the direction of the arrow due to its own weight, but the ring 4 interposed between the pair of plates 2 and 3 is a kind of spacer or "replacement bar".
Therefore, the stepping motor 55 is prevented from tilting. Therefore, with this inclination, the gear 5
It is possible to prevent problems such as tooth skipping of 8, 59 from occurring, and in this sense, a mount product exhibiting excellent performance can be provided.

The ring 4 includes the frame 54, the stepping motor 55, the elastic body 1 and the pair of plates 2 and 3.
Since they are slidably arranged with respect to each other, even if the ring 4 is provided, the vibration damping function of the vibration damping mount is not impaired. Therefore, since the torsional rigidity (spring constant) of the elastic body 1 is set small, the mount product exhibiting excellent vibration damping performance can be provided.

Furthermore, the ring 4 has a pair of plates 2,
Since it is arranged between the elastic body 1 and the pair of plates 2 and 3 so as not to come off from the vulcanization molded product, it is possible to prevent the ring 4 from being forgotten to be attached, and to prevent the mounting. Workability can be improved.

The ring 4 is formed of metal or resin. If the sliding resistance is too large and this causes a problem, the ring 4 is formed of a low friction material such as a dry bearing (Oiltron or Rare Freon). It is a good idea to mold by. There are also solutions to increase the contact surface pressure.

Fourth Embodiment As shown in FIG. 4, the vibration proof mount according to the present embodiment is located on the outer peripheral side of the elastic body 1 made of a rubber-like elastic material and between the pair of plates 2 and 3. In addition, a ring 4 is slidably provided as a fourth part following the elastic body 1 and the pair of plates 2 and 3, and more specifically, it has the following configuration.

That is, first, there is an elastic body 1 made of a rubber-like elastic material having a predetermined thickness, and a through hole 1a opened in a substantially circular shape is provided at the center of the elastic body 1. Metal plates 2 and 3 each having a larger outer diameter than the elastic body 1 are connected to both end surfaces 1b and 1c (vulcanization adhesion).
Have been. The pair of plates 2 and 3 are configured such that both end surfaces 1b and 1c of the elastic body 1 are substantially parallel to each other,
Through holes 2a, 3a, which are arranged substantially parallel to each other and which are open to substantially the same shape and size and which communicate with the through hole 1a of the elastic body 1, are provided in the pair of plates 2, 3, respectively. The inner diameter of the elastic body 1 and the inner diameter of the pair of plates 2 and 3 are set to be substantially the same as the inner diameter of the through hole 54a provided in the frame 54. Further, the pair of plates 2 and 3 each have an outer peripheral shape that is formed into a substantially rhombic shape (the corners are rounded), and the plates 9 and 9
A stepping motor, which is arranged with a displacement of 0 degree, and in which one plate 2 is connected (bolted) to the frame 54 of the device which is a support and the other plate 3 is a supported body, as shown in the figure. It is connected (bolted) to 55, so that the vibration-proof mount elastically supports the stepping motor 55 laterally (generally horizontally). The shaft 56 protruding in the lateral direction of the stepping motor 55 is provided with the through holes 1a, 2a, 3a, 5
4a, and a plurality of gears 58,
It is connected to the torque transmission unit 57 including 59 and the like.

A substantially cylindrical ring 4 for keeping the pair of plates 2 and 3 substantially parallel to each other is slidably interposed between the pair of plates 2 and 3 on the outer peripheral side of the elastic body 1. It is equipped.

The axial length of the ring 4 is set to be approximately equal to or slightly smaller than the distance between the pair of plates 2 and 3, that is, the thickness of the elastic body 1, whereby the axial direction of the ring 4 is determined. A gap (not shown) is formed between the end surface 4a and the one plate 2 and between the other axial end surface 4b and the other plate 3, respectively, whereby the ring 4 is formed with respect to each plate 2, 3. It is designed to slide smoothly. The inner diameter of this ring 4 is
The outer diameter of the elastic body 1 is set to be substantially the same as or slightly larger than the outer diameter of the elastic body 1, whereby a fitting gap (not shown) is formed between the inner peripheral surface 4e of the ring 4 and the elastic body 1. The ring 4 is configured to smoothly slide on the elastic body 1. In order to prevent the elastic body 1 from being damaged, the axial ends of the inner peripheral surface 4e of the ring 4 are
It has a predetermined roundness or taper. The outer diameter of the ring 4 is set to be substantially the same as the minimum outer diameter of each plate 2, 3.

As shown in the figure, the anti-vibration mount having the above structure is interposed between the frame 54 and the stepping motor 55 to laterally and elastically support the stepping motor 55. The elasticity effectively absorbs and suppresses the vibration generated in the stepping motor 55.

If the torsional rigidity (spring constant) of the elastic body 1 is set to be small in order to enhance the vibration damping effect, the spring constant of the elastic body 1 in the radial direction (shear direction) is reduced accordingly, and stepping is performed. The motor 55 tends to tilt in the direction of the arrow due to its own weight, but the ring 4 interposed between the pair of plates 2 and 3 is a kind of spacer or "replacement bar".
Therefore, the stepping motor 55 is prevented from tilting. Therefore, with this inclination, the gear 5
It is possible to prevent problems such as tooth skipping of 8, 59 from occurring, and in this sense, a mount product exhibiting excellent performance can be provided.

The ring 4 includes the frame 54, the stepping motor 55, the elastic body 1 and the pair of plates 2 and 3.
Since they are slidably arranged with respect to each other, even if the ring 4 is provided, the vibration damping function of the vibration damping mount is not impaired. Therefore, since the torsional rigidity (spring constant) of the elastic body 1 is set small, the mount product exhibiting excellent vibration damping performance can be provided.

Furthermore, the ring 4 has a pair of plates 2,
Since it is arranged between the elastic body 1 and the pair of plates 2 and 3 so as not to come off from the vulcanization molded product, it is possible to prevent the ring 4 from being forgotten to be attached, and to prevent the mounting. Workability can be improved.

The ring 4 is formed of metal or resin. If the sliding resistance is too large and this poses a problem, the ring 4 should be replaced with a low friction material such as a dry bearing (Oiltron or Rare Freon). It is a good idea to mold by. There are also solutions to increase the contact surface pressure.

The structure of the vibration-proof mount described in the first to fourth embodiments can be modified as follows.

The inner diameter dimension of one plate 2 and the elastic body 1 are made larger than the inner diameter dimension of the other plate 3 and the through hole 54 a provided in the frame 54, so that one plate 2 and the elastic body 1 are formed. The ring 4 is interposed between the other plate 3 and the frame 54 on the inner peripheral side of the. The inner diameter dimension of the elastic body 1 and the other plate 3 are made larger than the inner diameter dimension of the one plate 2 so that the inner peripheral side of the elastic body 1 and the other plate 3 and the one plate 2 and the stepping motor 55. A ring 4 is interposed between the and.

The ring 4 is fixed to one plate 2 so as to be slidable with respect to the elastic body 1, the other plate 3 and the stepping motor 55. When the ring 4 does not come into contact with the stepping motor 55, the ring 4 is fixed to the plate 2 on one side and slidable with respect to the elastic body 1 and the plate 3 on the other side. The ring 4 is integrally formed on one plate 2, and the elastic body 1, the other plate 3 and the stepping motor 55 are formed.
It is slidable with respect to. When the ring 4 does not come into contact with the stepping motor 55, the ring 4 is integrally formed on the one plate 2 so as to be slidable with respect to the elastic body 1 and the other plate 3.

The ring 4 is fixed to the other plate 3 so as to be slidable with respect to the one plate 2, the elastic body 1 and the frame 54. When the ring 4 does not come into contact with the frame 54, the ring 4 is fixed to the other plate 3 so as to be slidable with respect to the one plate 2 and the elastic body 1. The ring 4 is formed integrally with the other plate 3 so as to be slidable with respect to the one plate 2, the elastic body 1 and the frame 54. When the ring 4 does not come into contact with the frame 54, the ring 4 is integrally formed with the other plate 3 so as to be slidable with respect to the one plate 2 and the elastic body 1.

[0049]

The present invention has the following effects.

That is, in the vibration-proof mount of the present invention having the above-mentioned structure, the elasticity of the elastic body can effectively absorb and suppress the vibration generated in the supported body such as the stepping motor. Even if the torsional rigidity (spring constant) of the elastic body is set to be small in order to enhance the vibration damping effect, the ring acts as a kind of spacer to prevent the supported body from tilting or being eccentric. You can Therefore, it is possible to prevent problems such as gear jumps due to the inclination and eccentricity from occurring, and it is possible to provide a mount product exhibiting excellent performance in this sense. Further, since the ring is provided slidably, the vibration-proof function of the vibration-proof mount is not impaired. Therefore, it is possible to effectively utilize the fact that the torsional rigidity (spring constant) of the elastic body is set small, and thereby it is possible to provide a mount product exhibiting excellent vibration damping performance.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a mounted state of a vibration proof mount according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a mounted state of a vibration proof mount according to a second embodiment of the present invention.

FIG. 3 is a cross-sectional view showing a mounted state of a vibration proof mount according to a third embodiment of the present invention.

FIG. 4 is a cross-sectional view showing a mounted state of a vibration proof mount according to a fourth embodiment of the present invention.

FIG. 5 is a cross-sectional view showing a mounted state of a vibration isolation mount according to a conventional example.

FIG. 6 is a side view of the vibration isolation mount as a single product.

[Explanation of symbols]

 1 elastic body 1a, 2a, 3a, 54a through hole 1b, 1c end face 2 one plate 3 other plate 4 ring 4a, 4b axial end face 4c outer peripheral surface 4d engaging portion 4e inner peripheral surface 54 frame (support) 55 Stepping motor (supported body) 56 Shaft 57 Torque transmission part 58, 59 Gear

Claims (1)

[Claims] 1. An elastic body (1) made of a rubber-like elastic material having a through hole (1a), and both end faces (1b) of the elastic body (1).
The through holes (2a) and (3) that are respectively connected to the (1c), are arranged substantially parallel to each other, and communicate with the through hole (1a).
a) provided with a pair of plates (2) and (3) respectively, one of the plates (2) is connected to the support (54) side and the other of the plates (3) is supported (55). ) Side to elastically support the supported body (55), and the pair of plates (2) (3) is provided on the inner peripheral side or the outer peripheral side of the elastic body (1). )
Anti-vibration mount, characterized in that a ring (4) for maintaining that the two are substantially parallel to each other is provided slidably.