JP3691523B2 - Vibration isolator - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a vibration isolator that absorbs vibration from a vibration generating unit, and is applicable to, for example, automobiles, general industrial machines, and the like.
[0002]
[Prior art]
Conventionally, there has been known a vibration isolator having a structure in which an inner cylinder is attached to an outer cylinder via an elastic body such as rubber, and a bracket for fixing to the engine is attached to an upper end portion or a lower end portion of the inner cylinder. It has been. In such an anti-vibration device, the upper end or lower end of the outer cylinder is bent, and the bracket is locked by the bent portion to prevent the bracket from being displaced more than necessary. The cylinder is prevented from being displaced more than necessary.
[0003]
And the reinforcement metal fitting which attached the rubber | gum used as a shock absorbing material for relieving the impact at the time of a contact with an outer cylinder is being fixed to the bracket side.
[0004]
As shown in FIG. 5, the suspension type of the vibration isolator has an inner cylinder 114 attached to the inside of the outer cylinder 110 through a rubber 112 so as to be movable up and down, and is attached to the outside of the outer cylinder 110. A pair of legs 118 were fixed by welding or the like. Further, the reinforcing bracket 130 and the bracket 122 are screwed to the bolt 126 so that the C-shaped reinforcing bracket 130 with the rubber 124 attached to the outer peripheral side is opposed to the bent lower end portion 110A of the outer cylinder 110 by pressing or the like. It is attached to the inner cylinder 114 by screwing into the hole 116.
[0005]
Accordingly, when the bracket 122 is raised more than necessary, the rubber 124 comes into contact with the lower end portion 110A of the outer cylinder 110 as shown in FIG. 5, and the bracket 122 is prevented from further rising.
[0006]
On the other hand, in addition to the above-described vibration isolator, there is also known one in which a bracket 232 is positioned on the upper side of the vibration isolator as shown in FIGS. As in the case of the vibration isolator of FIG. 5, the vibration isolator has an inner cylinder 214 attached to the inside of the outer cylinder 210 via a rubber 212 so as to be movable up and down, and a pair of leg portions 218 outside the outer cylinder 210. Is fixed by welding or the like. Further, the reinforcing metal fitting 230 and the bracket 222 are connected to the screw hole 216 of the bolt 226 so that the disk-shaped reinforcing metal fitting 230 having the rubber 224 attached to the lower surface thereof faces the bent upper end portion 210A of the outer cylinder 210. Is attached to the inner cylinder 214 by screwing. The proximal end side of the bracket 222 is fixed by being screwed to the engine 232 side.
[0007]
Accordingly, when the bracket 222 is lowered more than necessary, the rubber 224 comes into contact with the upper end portion 210A of the outer cylinder 210, and the bracket 222 is prevented from further descending.
[0008]
[Problems to be solved by the invention]
By the way, in this type of conventional vibration isolator, as described above, in order to prevent significant displacement of the brackets 122 and 222, the reinforcing metal members 130 and 230 are attached to the brackets 122 and 222, and the reinforcing metal members 130 and 230 are attached. A rubber for preventing an impact when the outer cylinders 110 and 210 are in contact with each other is attached. As a result, the number of parts increases and the manufacturing cost increases.
[0009]
On the other hand, since the reinforcing brackets 130 and 230 are formed of a thin plate material due to problems such as space, the reinforcing brackets 130 and 230 strongly contact the outer cylinders 110 and 210 when excessively large amplitude is generated from the engine side. As a result, the reinforcing metal fittings 130 and 230 may be deformed or damaged.
[0010]
In view of the above facts, an object of the present invention is to provide a vibration isolator having a reduced number of parts and an improved strength by integrating a reinforcing bracket and a bracket or an outer cylinder.
[0011]
[Means for Solving the Problems]
The vibration isolator according to claim 1 includes a cylindrical outer cylinder coupled to one of the vibration generating portion and the vibration receiving portion, an inner cylinder having a proximal end located inside the outer cylinder, the inner cylinder, and the outer cylinder. An elastic body disposed between the inner cylinder and the outer cylinder so as to connect the cylinder, and one end portion having a flat portion having a size corresponding to an end portion of the outer cylinder are formed from the inside of the outer cylinder. A bracket attached to the tip end of the protruding inner cylinder and having the other end connected to the other of the vibration generating part and the vibration receiving part, and press-fitted into one end of the bracket so as to face the end of the outer cylinder And a rubber cushioning material that contacts the outer cylinder and restricts the displacement of the bracket as the bracket moves, and has a prismatic portion formed in a solid shape at one end of the bracket. provided, it was injected the buffer material to be press outer surface of the angular bar portion And wherein the door.
[0013]
[Action]
The operation of the vibration isolator according to claim 1 will be described.
[0014]
Since the elastic body connects the inner cylinder and the outer cylinder, and the inner cylinder is connected to the vibration generating part via the outer cylinder or the bracket, when vibration is transmitted from the vibration generating part side to the outer cylinder or the inner cylinder. The elastic body is deformed, and as a result, the vibration is attenuated by the deformation of the elastic body, and the vibration is hardly transmitted to the vibration receiving portion connected to the inner cylinder or the outer cylinder.
[0015]
In addition, one end of the bracket located on the front end side of the inner cylinder so as to face the end of the outer cylinder has a flat portion having a size corresponding to the end of the outer cylinder, and is pressed into and fixed to the one end. The cushioning material to be brought into contact with the outer cylinder as the bracket moves. For this reason, the cushioning member restricts the movement of the bracket while absorbing the impact, and restricts the displacement of the bracket toward the outer cylinder more than necessary.
[0016]
Therefore, it is not necessary to attach the reinforcing metal fitting to the bracket, the number of parts is reduced, and since there is no reinforcing metal fitting, there is no possibility of deformation of the reinforcing metal fitting, and the strength of the vibration isolator is improved. The buffer material may be attached from being fixed is pressed into the one end portion of the bracket so as to face the end of the outer tube, the buffer material regardless of the vulcanization to the end portion of the bracket. In addition, a solid prismatic prism portion is provided at one end of the bracket, and a cushioning material is press-fitted and fixed so as to press-contact the outer surface of the prismatic portion. The bracket is directly supported by a square column portion of the bracket which is reinforced more than the reinforcing metal fitting or the like in the bracket.
[0019]
【Example】
A vibration isolator according to a first embodiment of the present invention is shown in FIGS. 1 and 2, and the present embodiment will be described based on these drawings.
[0020]
As shown in FIGS. 1 and 2, the suspension type vibration isolator 10 according to the present embodiment includes an outer cylinder 12 as a vibration receiving portion connected to the vehicle body side of an automobile as an example. The outer cylinder 12 is cup-shaped, and the upper side is a large-diameter portion 12A formed with a constant diameter, and the lower-side is provided with a small-diameter portion having a smaller diameter than the large-diameter portion 12A via a step portion 12B. 12C is provided. And the bottom part 12E which forms the lower end part of 12 C of small diameter parts is provided so that the lower part of 12 C of small diameter parts may be plugged, and the circular hole 76 which is a circular through-hole is provided in the center part of this bottom part 12E.
[0021]
Further, a substantially L-shaped mounting leg 14 for attaching the outer cylinder 12 to the vehicle body is fixed to the small diameter portion 12C, and a bolt hole 16 through which a mounting bolt (not shown) is inserted is formed in the mounting leg 14. Yes.
[0022]
Inside the outer cylinder 12, an elastic block 18 and a partition member 20 are continuously arranged in the vertical direction. As shown in FIG. 1, the elastic body block 18 includes an elastic body 24, an inner cylinder fitting 26, and the like that are arranged coaxially with the outer cylinder 12.
[0023]
The inner cylinder fitting 26 includes a cylindrical portion 28 formed in a cylindrical shape and a flange portion 30 having a bottom portion 30A that is welded and fixed to the upper end portion of the inner cylinder fitting 26.
[0024]
The cylindrical portion 28 has a female screw 28 </ b> A formed on the inner periphery, and the tip side, which is a part of the lower portion of the inner tube fitting 26, protrudes downward from a circular hole 76 formed in the bottom portion 12 </ b> E of the outer tube 12. Yes. Further, the flange portion 30 which is the base end side of the inner cylindrical metal fitting 26 has a small circular bottom portion 30A, and a tapered portion 30B whose diameter increases as it goes upward is continuously formed on the outer periphery of the bottom portion 30A. Further, a ring-shaped flat portion 30C extending outward in the radial direction is formed at the upper end of the tapered portion 30B.
[0025]
On the other hand, the elastic body 24 has a ring shape and is disposed between the inner cylinder fitting 26 and the inner peripheral surface of the outer cylinder 12, and the outer periphery is vulcanized and bonded over the entire inner peripheral surface near the lower portion of the outer cylinder 12. The inner periphery is vulcanized and bonded to the outer peripheral surface excluding the bottom portion 30 </ b> A of the flange portion 30 and the substantially upper half of the outer peripheral surface of the cylindrical portion 28.
[0026]
On the other hand, as shown in FIGS. 1 and 2, a rectangular column portion 66 </ b> A of a mounting arm 66, which is a bracket formed of iron casting or the like, is disposed below the outer cylinder 12 so as to face the bottom portion 12 </ b> E. The prism portion 66A located at one end of the mounting arm 66 is formed larger than the conventional bracket 122 shown in FIG. 5, and has a flat portion 69 having a size corresponding to the bottom portion 12E so as to face the bottom portion 12E. ing. On the outer periphery of the prismatic part 66A of the mounting arm 66, a thick elastic rubber body 64 is press-fitted and fixed to the prismatic part 66A. Therefore, the elastic body 64 becomes a cushioning material that absorbs an impact when the elastic body 64 comes into contact with the outer cylinder 12.
[0027]
Then, a bolt 67 is inserted from below into the bolt hole 65 formed in the prism portion 66A, and this bolt 67 is screwed into the female screw 28A of the cylindrical portion 28, so that the mounting arm 66 is fixed to the inner cylinder fitting 26. The
[0028]
Further, as shown in FIG. 2, an attachment portion 66B is formed at the other end portion of the attachment arm 66, and a plurality of bolt holes 68 for connection to an engine (not shown) serving as a vibration generating portion. Is formed.
[0029]
On the other hand, as shown in FIG. 1, a substantially cylindrical partition wall member 20 that is disposed on the upper side of the elastic block 18 and whose outer peripheral surface is in close contact with the inner peripheral surface of the outer cylinder 12 is incorporated in the outer cylinder 12. Has been inserted so that. In the partition member 20, a large-diameter recess 34 is formed in the center of the lower portion, and a circular hole 36 penetrating in the axial direction is formed in the center of the large-diameter recess 34. The depth dimension of the large-diameter recess 34 is slightly more than half the axial length of the partition member 20.
[0030]
On the other hand, a ring groove 38 is formed on the outer peripheral side of the circular hole 36 in the upper part of the partition member 20.
[0031]
The circular hole 36 is closed by the first diaphragm 40 from the side opposite to the elastic body block 18 side. The first diaphragm 40 has a thick disk shape, and a recess 40A is formed at the center of the upper surface. A reinforcing ring 41 is vulcanized and bonded to the outer peripheral edge portion of the first diaphragm 40, and the lower surface of the outer peripheral edge side of the reinforcing ring 41 is exposed to the outside and is the upper end surface of the side wall 20A on the inner peripheral side of the ring groove 38. It is in close contact with.
[0032]
On the upper side of the first diaphragm 40, a holding metal fitting 42 formed of a thin plate material such as metal is disposed. The presser fitting 42 has a cylindrical side wall 42B that rises upward on the outer periphery of a circular bottom portion 42A, and a flange 42C that extends radially outward at the upper end of the side wall 42B. Yes.
[0033]
A second diaphragm 44 that is thinner than the first diaphragm 40 is disposed above the presser fitting 42. A mounting ring 44 </ b> A is vulcanized and bonded to the outer peripheral edge of the second diaphragm 44.
[0034]
Further, a diaphragm cover 46 formed of a thin plate material such as metal is disposed on the upper side of the second diaphragm 44. A central portion of the diaphragm cover 46 is convex upward, and an outer peripheral edge portion 46A of the diaphragm cover 46 is disposed above the attachment ring 44A of the second diaphragm 44. An air chamber 47 is provided between the diaphragm cover 46 and the second diaphragm 44.
[0035]
The outer peripheral edge portion of the presser fitting 42, the mounting ring 44A of the second diaphragm 44, and the outer peripheral edge portion 46A of the diaphragm cover 46 are overlapped with the upper end portion of the partition wall member 20, and are formed thinly at the upper end portion of the outer cylinder 12. By caulking the thinned portion 12 </ b> F inward, these members are sandwiched between the upper end portion of the outer cylinder 12 and the upper end portion of the partition wall member 20. The first diaphragm 40 is fixed by holding the outer peripheral edge portion between the presser fitting 42 and the upper end surface of the side wall 20A.
[0036]
In addition, a plurality of holes 54 are formed in the vicinity of the center of the presser fitting 42, and the first diaphragm 40 side and the second diaphragm 44 side sandwich the presser fitting 42 through the plurality of holes 54. Communicate.
[0037]
Here, a space surrounded by the large-diameter concave portion 34 of the partition wall member 20 and the elastic body block 18 is a pressure receiving liquid chamber 57, and between the pressing metal 42 and the first diaphragm 40 and between the pressing metal 42 and the second A space between the diaphragm 44 and the diaphragm 44 serves as a secondary liquid chamber 59.
[0038]
On the other hand, a space surrounded by the ring groove 38 and the holding metal fitting 42 is a restriction passage 48 and communicates with the pressure receiving liquid chamber 57 through a through hole 50 formed in the bottom of the ring groove 38. In addition, a hole 52 is formed in the holding metal 42 on the opposite side of the through hole 50 with respect to the through hole 50, and the restricting passage 48 communicates with the auxiliary liquid chamber 59 through the hole 52. Therefore, the pressure receiving liquid chamber 57 and the sub liquid chamber 59 are always in communication with each other through the restriction passage 48, and water, silicon oil, ethin glycol is contained in the pressure receiving liquid chamber 57, the sub liquid chamber 59, and the restriction passage 48. Etc. are filled with liquid.
[0039]
A groove 56 is formed at the outer peripheral corner of the upper end of the partition wall member 20, and an O-ring 58 is disposed in the groove 56 in order to improve the sealing performance.
[0040]
Next, the operation of this embodiment will be described.
When the vibration isolator 10 is assembled, as shown in FIGS. 1 and 2, the elastic body 24 is vulcanized and bonded between the outer cylinder 12 to which the mounting leg 14 is fixed and the inner cylinder fitting 26, and this state is obtained. The bottom portion 12E is formed by bending the lower end portion of the outer cylinder 12 by pressing or the like. Then, the mounting arm 66 is screwed with a bolt 67 to the lower portion of the cylindrical portion 28 constituting the inner cylinder fitting 26.
[0041]
Thereafter, as shown in FIG. 1, the partition member 20, the first diaphragm 40, the presser fitting 42, the second diaphragm 44, and the diaphragm cover 46 are sequentially inserted, and the thin portion 12 </ b> F of the outer cylinder 12 is caulked inside. .
[0042]
The liquid may be filled by being performed in the liquid when the partition member 20, the first diaphragm 40, the presser fitting 42, the second diaphragm 44, and the diaphragm cover 46 are inserted into the outer cylinder 12, You may make it inject | pour into the outer cylinder 12 from the hole for liquid filling after an assembly.
[0043]
As an example, the vibration isolator 10 of the present embodiment connects the mounting leg 14 to a vehicle body of a vehicle with a bolt (not shown), and connects the mounting arm 66 to a vehicle engine (not shown). At this time, when the inner cylinder fitting 26 receives the load of the engine, the elastic body 24 is compressed and deformed, the inner cylinder fitting 26 moves downward from the state of FIG. 1, and the mounting arm 66 is moved to the bottom of the outer cylinder 12. A distance of a predetermined dimension from 12E.
[0044]
When the engine vibration is transmitted to the inner cylinder fitting 26 via the mounting arm 66, the elastic body 24 is deformed to attenuate the vibration, and the vibration load transmitted to the vehicle body connected to the outer cylinder 12 is small. However, the pressure-receiving liquid chamber 57, the auxiliary liquid chamber 59, the restriction passage 48, etc. act as follows.
[0045]
For example, when the engine vibration is a low frequency vibration, the liquid moves back and forth between the main liquid chamber 57 and the sub liquid chamber 59 via the restriction passage 48 and generates a large damping force to absorb the low frequency vibration. Is done.
[0046]
When the frequency of vibration increases, the restriction passage 48 becomes clogged. At this time, the first diaphragm 40 is deformed to avoid an increase in pressure in the main liquid chamber 57.
[0047]
Further, when the engine vibration is a high-frequency vibration, the liquid resonates in an annular gap between the peripheral portion of the flat portion 30C of the inner cylinder fitting 26 and the inner wall surface of the partition wall member 20, and the dynamic spring constant is Reduced.
[0048]
Further, when a large amplitude vibration is transmitted from the engine side, the elastic member is directly attached to the prism portion 66A of the attachment arm 66 located on the distal end side of the inner cylinder 26 so as to face the bottom portion 12E of the outer cylinder 12. The body 64 contacts the outer cylinder 12 as the mounting arm 66 moves. For this reason, the elastic body 64 restricts the movement of the mounting arm 66 while absorbing the impact, and restricts the displacement of the mounting arm 66 toward the outer cylinder 12 more than necessary.
[0049]
Therefore, it is not necessary to attach the reinforcing bracket to the mounting arm 66 as shown in FIG. 5, the number of parts is reduced, and the rectangular column portion 66A of the mounting arm 66 formed larger and strengthened than the conventional bracket directly attaches the elastic body 64. Since it supports, it does not deform | transform and the intensity | strength of the vibration isolator 10 improves.
[0050]
In the above embodiment, the liquid filled type vibration isolator has been described. However, it is needless to say that the present invention can be applied to a vibration isolator other than the liquid filled type.
[0051]
Next, a vibration isolator according to a second embodiment of the present invention is shown in FIGS. 3 and 4, and this embodiment will be described based on these drawings.
[0052]
As shown in FIGS. 3 and 4, the vibration isolator 100 according to the present embodiment includes, as an example, an outer cylinder 82 as a vibration receiving portion connected to the vehicle body side of the automobile. The outer cylinder 82 has a cylindrical shape with the lower side open, and the upper side has a large diameter part 82A formed with a constant diameter. The lower part of the outer cylinder 82 has a tapered part 82B via a tapered part 82B. A small-diameter portion 82C that forms the outer frame is provided. And the top part 82E which forms the upper end part of the large diameter part 82A is provided so that the upper part of the large diameter part 82A may be plugged, and the circular hole 106 which is a circular through-hole is provided in the center part of this top part 82E. .
[0053]
Further, a substantially L-shaped mounting leg 84 for attaching the outer cylinder 82 to the vehicle body is fixed to the small diameter portion 82C, and a bolt hole 86 through which a mounting bolt (not shown) is inserted is formed in the mounting leg 84. Yes.
[0054]
Furthermore, an elastic body block 88 is disposed inside the outer cylinder 82. As shown in FIG. 3, the elastic body block 88 includes an elastic body 94 and an inner cylinder fitting 96 that are disposed coaxially with the outer cylinder 82.
[0055]
The inner cylinder fitting 96 has a female screw 96 </ b> A formed on the inner periphery, and the tip side that is a part of the upper part of the inner cylinder fitting 96 is upward from a circular circular hole 106 formed in the top portion 82 </ b> E of the outer cylinder 82. It protrudes.
[0056]
On the other hand, the elastic body 94 has a ring shape and is disposed between the inner cylinder fitting 96 and the inner peripheral surface of the outer cylinder 82, and the outer periphery is vulcanized and bonded over the entire inner peripheral surface of the tapered portion 82 </ b> B of the outer cylinder 82. The inner periphery is vulcanized and bonded to the substantially lower half which is the base end side of the inner cylindrical metal fitting 96.
[0057]
On the other hand, as shown in FIGS. 3 and 4, a distal end portion 102A constituting one end portion of the mounting arm 102, which is a bracket formed of iron casting or the like, is disposed above the outer cylinder 82 so as to face the top portion 82E. It is installed. A lower surface 102C facing the outer cylinder 82 of the tip 102A of the mounting arm 102 is planar, and a thick elastic body 92 is vulcanized and bonded to the lower surface 102C. Therefore, the elastic body 92 becomes a cushioning material that absorbs an impact when the elastic body 92 comes into contact with the outer cylinder 82.
[0058]
Then, a bolt 90 is inserted from above through the bolt hole 103 formed in the distal end portion 102 </ b> A, and this bolt 90 is screwed into the female screw 96 </ b> A of the inner cylinder fitting 96, so that the mounting arm 102 is fixed to the inner cylinder fitting 96. Is done.
[0059]
An attachment portion 102B is formed at the other end portion of the attachment arm 102, and a plurality of bolt holes 108 for connection to the engine 80 serving as a vibration generating portion are formed. Then, the bolt 90 is inserted into the bolt hole 108, the bolt 90 is screwed into the engine 80, and the mounting arm 102 is fixed to the engine 80.
[0060]
Next, the operation of this embodiment will be described.
When the vibration isolator 100 is assembled, as shown in FIGS. 3 and 4, an elastic body 94 is vulcanized and bonded between the outer cylinder 82 to which the mounting legs 84 are fixed and the inner cylinder fitting 96, and this state is obtained. Then, the top portion 82E is formed by bending the upper end portion of the outer cylinder 82 by pressing or the like. Then, the mounting arm 102 is screwed to the upper portion of the inner cylinder fitting 96 with a bolt 90.
[0061]
As an example, the vibration isolator 100 according to the present embodiment connects the mounting leg 84 to a vehicle body of a vehicle with a bolt (not shown), and connects the mounting arm 102 to the engine 80 of the vehicle. At this time, when the inner cylinder fitting 96 receives the load of the engine 80, the elastic body 84 is compressed and deformed, and the inner cylinder fitting 96 moves downward, so that the mounting arm 102 is moved to the outer cylinder 82 as shown in FIG. Stops at a position away from the top 82E by a predetermined dimension.
[0062]
When the engine vibration is transmitted to the inner cylinder fitting 96 through the mounting arm 102, the elastic body 84 is deformed to attenuate the vibration, and the vibration load transmitted to the vehicle body connected to the outer cylinder 82 is reduced. Become.
[0063]
Further, when a large amplitude vibration is transmitted from the engine side, the elasticity attached directly to the distal end portion 102A of the mounting arm 102 located on the distal end side of the inner cylinder 96 so as to face the top portion 82E of the outer cylinder 82. The body 92 abuts on the outer cylinder 82 as the mounting arm 102 moves. Therefore, the elastic body 92 regulates the movement of the mounting arm 102 while absorbing the impact, and restricts the displacement of the mounting arm 102 toward the outer cylinder 82 more than necessary.
[0064]
Accordingly, it is not necessary to attach the reinforcing bracket to the mounting arm 102 as shown in FIGS. 6 and 7, the number of parts is reduced, and the tip 102A of the mounting arm 102 which is formed and strengthened larger than the conventional bracket is an elastic body. Since 92 is directly supported, it is not deformed and the strength of the vibration isolator 10 is improved.
[0065]
In the embodiment, the elastic body serving as the buffer material is fixed to the mounting arm side serving as the bracket. However, it is needless to say that the elastic body may be fixed to the outer cylinder side. Yes. Furthermore, in the embodiment, the purpose is to isolate the engine mounted on the automobile, but it goes without saying that the vibration isolator of the present invention can be used for, for example, a body mount of an automobile or other uses other than the automobile. Further, the shape and dimensions of the elastic body and the like are not limited to those of the examples.
[0066]
【The invention's effect】
As described above, since the vibration isolator of the present invention has the above configuration, it has an excellent effect that the number of parts is reduced and the strength is improved.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a vibration isolator according to a first embodiment of the present invention.
FIG. 2 is an exploded perspective view of the vibration isolator according to the first embodiment of the present invention.
FIG. 3 is a cross-sectional view of a vibration isolator according to a second embodiment of the present invention.
FIG. 4 is a plan partial sectional view of a vibration isolator according to a second embodiment of the present invention.
FIG. 5 is a cross-sectional view of a conventional vibration isolator.
FIG. 6 is a cross-sectional view of a vibration isolator according to another prior art.
7 is a plan partial sectional view of the vibration isolator of FIG. 6;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Vibration isolator 12 Outer cylinder 18 Elastic body block 24 Elastic body 26 Inner cylinder metal fitting (inner cylinder)
57 Pressure receiving chamber 64 Elastic body (buffer material)
66 Mounting arm (bracket)
82 Outer cylinder 88 Elastic body block 92 Elastic body (buffer material)
94 Elastic body 96 Inner tube metal fitting (inner tube)
100 Anti-vibration device 102 Mounting arm (bracket)

Claims (1)

A cylindrical outer cylinder connected to one of the vibration generating part and the vibration receiving part, an inner cylinder whose proximal end is located inside the outer cylinder, and the inner cylinder and the outer cylinder are connected to each other. An elastic body disposed between the cylinder and the outer cylinder, and one end portion having a flat portion corresponding to the end of the outer cylinder are located on the distal end side of the inner cylinder protruding from the outer cylinder A bracket that is attached and has the other end connected to the other of the vibration generating portion and the vibration receiving portion, and press-fitted and fixed to one end of the bracket so as to face the end of the outer cylinder, and the movement of the bracket And a rubber cushioning material that contacts the outer cylinder and restricts the displacement of the bracket,
An anti-vibration device according to claim 1 , wherein a solid prism-shaped prism portion is provided at one end of the bracket, and the cushioning material is press-fitted so as to be in pressure contact with the outer surface of the prism portion .

Images