JP2016080142A - Vibration-proof device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrict a bracket and a main body member from being displaced in an axial direction and a rotating direction of a fixing part.SOLUTION: A vibration-proof device comprises: a fixing part fixed to one of a vibration generating part and a vibration receiving part; a bracket fixed to the other of the vibration generating part and the vibration receiving part and having an outer periphery part forming an inner space storing at least a part of the fixing part; a leg part arranged in the inner space, fixed to the fixing part and at the same time press fitted and fixed to the bracket to connect the bracket and the fixing part resiliently and arranged at one side in a vertical direction of the fixing part; an elastic body having an inclusion part arranged at the other side in a vertical direction of the fixing part; a leg part position setting part arranged at the bracket so as to set position of the leg against the bracket; and an inclusion part position setting part arranged at the bracket so as to set position of the inclusion part against the bracket.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vibration isolator that is used when mounting a vibration generating unit such as an automobile engine on a vibration receiving unit such as a vehicle body.

  An anti-vibration device is disclosed in which a main body member having an extendable leg portion is press-fitted into a bracket formed with a cylindrical portion (see Patent Document 1). At the end of the cylindrical portion in the axial direction, a retaining portion for pressing the fitting portion provided at the tip of the leg portion from the outside in the axial direction is formed, restricting the movement outward in the axial direction, and the main body member is the bracket It is prevented from slipping out from the inside to the outside in the axial direction.

JP 2011-214634 A

  In the above-mentioned Patent Document 1, since the main body member is fixed to the bracket with only the leg portion disposed on one side in the vertical direction of the mounting portion, the bracket and the main body member are likely to be displaced in the axial direction or the rotation direction of the mounting portion. It was a structure. For this reason, when the vibration isolator is assembled to the vehicle, if an assembly failure occurs due to a displacement, it is necessary to adjust the position by an operator.

  In view of the above fact, an object of the present invention is to suppress the displacement of the mounting portion with respect to the bracket.

  The vibration isolator according to claim 1 is attached to one of the vibration generating unit and the vibration receiving unit, and is attached to the other of the vibration generating unit and the vibration receiving unit, and stores at least a part of the mounting unit. A bracket having an outer periphery that forms an internal space; and is mounted in the internal space and attached to the mounting portion, and is press-fitted and fixed to the bracket to elastically connect the bracket and the mounting portion. A leg portion disposed on one side, an interposition portion disposed in the inner space and attached to the other side of the attachment portion, and the bracket, the leg portion with respect to the axial direction of the outer peripheral portion of the bracket. A leg positioning part for positioning, and an interposition part positioning part for positioning the interposition part with respect to the axial direction of the bracket are provided on the bracket.

  In this vibration isolator, a leg positioning part that positions the leg part with respect to the axial direction of the outer peripheral part of the bracket, an interposition part positioning part that positions the interposition part with respect to the axial direction of the outer peripheral part of the bracket, In addition, the interposition part and the leg part are disposed on the opposite sides of the attachment part, and are disposed in the internal space. Therefore, the leg portion, the interposition portion, and the bracket can be positioned with respect to the axial direction of the outer peripheral portion of the bracket on both sides of the attachment portion.

  According to a second aspect of the present invention, in the vibration isolator according to the first aspect, the interposition portion positioning portion includes a concave portion in which the inner space side is recessed in the outer peripheral portion, and a protrusion formed in the interposition portion and housed in the concave portion. Part.

  In this way, by forming the recess and the protrusion, it is possible to easily form the interposition portion positioning portion and the interposition portion.

  According to a third aspect of the present invention, in the vibration isolator according to the second aspect, the concave portion is provided in a long shape along the circumferential direction of the outer peripheral portion.

  In this vibration isolator, since the concave portion is formed in a long shape along the circumferential direction of the outer peripheral portion, when the engine is displaced in the vertical direction and the width direction, the protruding portion is difficult to contact the bracket, and the elastic body It is hard to affect the spring characteristics of

  According to the vibration isolator which concerns on this invention, the outstanding effect that it suppresses that a bracket and a main body member position-shift in the axial direction of a mounting part or a rotation direction is acquired.

It is a perspective view of the vibration isolator for demonstrating embodiment of this invention. It is a perspective view of a body member for explaining an embodiment of the invention. It is II sectional drawing of FIG. It is a front view of a main-body member.

Hereinafter, an embodiment of a vibration isolator according to the present invention will be described with reference to FIGS.
In the vibration isolator of the present embodiment, the lower side in FIG. 1 is the bounce side, that is, the direction in which a static load (support load) is input when the vibration isolator 1 is installed. The side is the rebound side, that is, the side opposite to the static load input direction. In the following description, the bound side is referred to as “lower side”, the rebound side is referred to as “upper side”, and the bound-rebound direction (Z direction shown in FIG. 1) is referred to as “vertical direction”. Further, in the present embodiment, the axial direction (Y direction shown in FIG. 1) of the bracket 2 and the mounting portion 4 to be described later is the vehicle left-right direction, and is hereinafter referred to as “axial direction”. Further, a horizontal direction (X direction shown in FIG. 1) orthogonal to the axial direction is the vehicle front-rear direction, and is hereinafter referred to as “width direction”.

  The vibration isolator 1 is a vehicle engine mount for mounting an engine (not shown) (corresponding to a vibration generating part in the present invention) on a vehicle body (corresponding to a vibration receiving part in the present invention) (not shown). This is a device for reducing vibration transmitted from the engine to the vehicle body. As shown in FIG. 1, the vibration isolator 1 includes a bracket 2 attached to a vehicle body (not shown) and an elastic body 5 arranged in an internal space 6 formed by an outer peripheral portion 22 of the bracket 2. . The elastic body 5 elastically connects the mounting portion 4 attached to the engine (not shown) and the bracket 2.

  As shown in FIGS. 1 and 2, the attachment portion 4 is an L-shaped metal fitting, and one straight portion of the L shape is accommodated in an internal space 6 formed by the outer peripheral portion 22 of the bracket 2. The mounting portion 4 is arranged such that the axis of the portion of the mounting portion 4 housed in the elastic body 5 is oriented along the axis of the bracket 2.

The elastic body 5 is, for example, a rubber elastic body made of a rubber material such as natural rubber, styrene / butadiene rubber (SBR), butadiene rubber (BR), etc., and is connected to the outer peripheral surface of the mounting portion 4 to be connected to the main body member 3. Is forming. The elastic body 5 includes a bound buffer portion 50 disposed below the attachment portion 4, a rebound buffer portion 51 (intervening portion in the present invention) disposed above the attachment portion 4, and the attachment portion 4. Side shock absorbers 52, 52 respectively disposed on both sides in the width direction, protrusions 56, 56 protruding upward from the rebound shock absorber 51, and arranged side by side in the width direction, and protruding toward the bracket 2. The pair of leg portions 53 and 53, and the fitting portions 54 and 54 provided at the tips of the leg portions 53 and 53, respectively, are provided.

  The bound buffer part 50 is a rubber body arranged below the attachment part 4 and is formed in a shape protruding downward in the direction of the arrow from the axial direction. The rebound buffer portion 51 is a rubber body that covers the upper surface of the attachment portion 4, and a plurality of groove portions 51 a that extend linearly in the axial direction over the entire length of the rebound buffer portion 51 are formed on the upper surface of the rebound buffer portion 51. Yes. The side buffer parts 52, 52 are rubber bodies that cover the side surfaces of the attachment part 4, and are formed integrally with the bound buffer part 50 and the rebound buffer part 51.

  The leg portion 53 is a support portion that is disposed on the lower side (one side in the vertical direction) of the mounting portion 4 and supports the mounting portion 4, and is disposed at a position that is compressed when a static load is applied. . Further, the pair of leg portions 53 and 53 are disposed symmetrically with respect to the central vertical line of the attachment portion 4. More specifically, the pair of leg portions 53 and 53 protrude obliquely downward from the bound buffer portion 50 and are arranged in a letter C shape as viewed from the axial direction.

  A pair of protrusions 56, 56 are formed integrally with the rebound buffer 51 on the upper surface of the rebound buffer 51. The pair of protrusions 56 and 56 have a trapezoidal shape (see FIG. 4) as viewed from the axial direction and a rectangular shape (see FIG. 3) as viewed from the width direction, and is located above the rebound buffer 51 (on the other side in the vertical direction). ) Projecting in the shape of a truncated pyramid. Further, the pair of protrusions 56 and 56 are arranged symmetrically with respect to the central vertical line of the attachment portion 4. More specifically, the axial dimension of the protrusion 56 is smaller than the axial dimension of the rebound buffer 51. Further, as shown in FIG. 4, the pair of protrusions 56, 56 are arranged in the width direction at the center in the axial direction of the rebound buffer part 51, and at least a part of the protrusions 56 is wider than the attachment part 4. Located on the outside.

The fitting portion 54 is a fixed portion that is fixed to the bracket 2, and protrudes outward in the width direction from the lower end of the leg portion 53. More specifically, the fitting portion 54 extends from the leg portion 53. The fitting portion 54 includes an upper surface 54a that protrudes outward in the width direction from the lower end of the inclined outer surface 53a of the leg portion 53, a side surface 54b that extends vertically downward from the tip of the upper surface 54a, and a side surface thereof. A lower surface 54c extending horizontally from the lower end of 54b toward the inner side in the width direction is formed. Further, the surfaces 54d on both sides in the axial direction of the fitting portion 54 protrude outward in the axial direction from the surface 53b (the surface facing outward in the axial direction) of the leg portion 53, and both sides in the axial direction of the fitting portion 54 A step 55 is formed between the surface 54 d of the leg and the surface 53 b of the leg 53.

  The bracket 2 is a metal fitting that surrounds and holds the main body member 3 in the internal space 6 formed by the outer peripheral portion 22. More specifically, the bracket 2 includes a lower plate 20 that extends along the width direction, and an upper plate 21 that is bent in a substantially U-shape and disposed in an open downward direction. . In the bracket 2, both lower ends of the upper plate 21 are placed on the upper surface of the lower plate 20, and the lower ends are welded to the upper surface of the lower plate 20. Further, side stopper portions 24 to be described later are formed on the side portions on both sides in the width direction of the upper plate 21, and both ends in the axial direction are welded to rib plates 28 to be described later. Thereby, the bracket 2 is formed with a rectangular tube-shaped outer peripheral portion 22 into which the main body member 3 is fitted in the internal space 6, and the bracket 2 described above includes a bound stopper portion 23, a side stopper portion 24 and a rebound which will be described later. The stopper 25 and the fitting recess 26 are formed as a single part.

  The above-described lower plate 20 has both end portions that protrude outward in the width direction of the upper plate 21 (outer peripheral portion 22). Bolt holes 27 through which bolts (not shown) for fastening to a vehicle body (not shown) are inserted are formed at both ends of the lower plate 20. Also, vertically extending rib plates 28 are provided on both side portions in the axial direction at both ends of the lower plate 20.

  A bound stopper portion 23 that restricts the downward displacement of the mounting portion 4 is formed on the lower surface portion of the outer peripheral portion 22, that is, the central portion in the length direction of the lower plate 20. The bound stopper portion 23 abuts against the bound buffer portion 50 when the attachment portion 4 is displaced downward in the vertical direction to a certain position relative to the bracket 2 and restricts the downward displacement of the attachment portion 4. It is a part to do. More specifically, the bound stopper portion 23 is a convex portion protruding upward, and is disposed between the pair of leg portions 53 and 53 (fitting portions 54 and 54) and the bound buffer portion. It is arranged below 50 at a distance.

  Side portions on both sides in the width direction of the outer peripheral portion 22, that is, side portions on both sides in the width direction of the upper plate 21 are side stopper portions 24 that restrict displacement of the mounting portion 4 to the outside in the width direction. The side stopper portion 24 comes into contact with the side buffer portion 52 described above when the mounting portion 4 is displaced outward in the width direction to a certain position relative to the bracket 2, and the side stopper portion 24 moves outward in the width direction of the mounting portion 4. It is a portion that regulates displacement, and is disposed at an interval on the outer side in the width direction of the side buffer portion 52.

  A pair of fittings that are disposed below the mounting portion 4 and fitted with fitting portions 54 at lower corners on both sides in the width direction of the outer peripheral portion 22, that is, lower ends on both sides in the width direction of the upper plate 21. Concave portions 26 are formed. The fitting recess 26 includes an upper surface 26a that protrudes outward in the width direction from the lower end of the side stopper portion 24, a side surface 26b that hangs downward from an end portion on the outer side in the width direction of the upper surface 26a, and a lower end of the side surface 26b. And a horizontal lower surface (the upper surface of the lower plate 20, not shown) formed between the above-described bound stopper portion 23. The upper surface 26 a of the fitting recess 26 is in close contact with the upper surface 54 a of the fitting portion 54, and the side surface 26 b of the fitting recess 26 is in close contact with the side surface 54 b of the fitting portion 54. The lower surface of the recess 26 is in close contact with the lower surface 54 c of the fitting portion 54.

  The upper surface portion of the outer peripheral portion 22, that is, the portion that restricts the upward displacement of the mounting portion 4 of the upper plate 21 in the vertical direction is a rebound stopper portion 25. The rebound stopper portion 25 is in pressure contact with the rebound buffer portion 51 before the engine (not shown) is attached to the attachment portion 4, but in the state after the engine (not shown) is attached to the attachment portion 4, The rebound buffer 51 is separated from the rebound stopper 25. Then, in a state after the engine is mounted, when the vibration of the engine (not shown) is input to the mounting portion 4 and the mounting portion 4 is displaced upward in the vertical direction up to a certain position relative to the bracket 2, The stopper portion 25 abuts on the rebound buffer portion 51 and restricts the upward displacement of the mounting portion 4.

A concave portion 25a (an interposition portion positioning portion in the present invention) is formed on the upper surface portion of the outer peripheral portion 22, that is, the lower surface of the rebound stopper portion 25, and protrudes outward (radially outward) of the outer peripheral portion 22. . More specifically, the recess 25a is formed in an elongated shape along the circumferential direction of the outer peripheral portion 22 at the center in the axial direction of the outer peripheral portion 22, and is continuous over the entire length of the upper plate 21 formed in a substantially U shape. Is formed. The recess 25 a forms a recess inner space 25 b between the recess 25 a and a plane passing through the lower end surface of the rebound stopper portion 25.
As shown in FIG. 3, the pair of protrusions 56, 56 engages with the recess 25 a by being housed in the recess inner space 25 b when the main body member 3 is press-fitted into the bracket 2, but When the load is applied, the pair of projecting portions 56 and 56 come out of the recess inner space 25b and the engagement is released.

  Further, at both end portions in the axial direction of the outer peripheral portion 22, a retaining portion 29 (a leg position determining portion in the present invention) that presses the fitting portion 54 from the outside in the axial direction is provided. The retaining portion 29 is a plate portion erected along the vertical direction from side end portions on both sides in the axial direction of the lower surface portion of the outer peripheral portion 22, and is formed integrally with the rib plate 28. In addition, the retaining portion 29 is formed between the rib plates 28 in a substantially U-shape (concave shape) with the upper portion opened in the direction of the arrow from the axial direction, and the surface 54d (shaft) of the fitting portion 54 is formed. A surface facing outward in the direction).

The main body member 3 is assembled to the bracket 2 by being press-fitted into the internal space 6 of the bracket 2 (outer peripheral portion 22) from the outside in the axial direction of the bracket 2. At this time, the main body member 3 is compressed and sandwiched in the vertical direction between the lower surface of the rebound stopper portion 25 and the lower surfaces of the fitting recesses 26, 26, and the side surfaces 26b of the pair of fitting recesses 26, 26. , 26b is compressed in the width direction and sandwiched, whereby a compression force is applied to the leg portions 53, 53 described above.
That is, the overall height molding dimension (the vertical dimension from the lower surface 54 c of the fitting portion 54 to the upper surface of the rebound buffer portion 51) of the main body member 3 in an unloaded state before being assembled to the bracket 2 is the height inside the outer peripheral portion 22. It is larger than the dimension (vertical dimension from the lower surface of the fitting recess 26 to the lower surface of the rebound stopper portion 25), and the molding dimension of the full width of the main body member 3 in the no-load state (the side surface 54b of one fitting portion 54). Horizontal dimension from the first fitting recess 54 to the side surface 54b of the other fitting portion 54 is the width dimension between the pair of fitting recesses 26, 26 (from the side surface 26b of one fitting recess 26 to the side surface 26b of the other fitting recess 26). Is larger than the horizontal dimension). And the main body member 3 is arrange | positioned inside the outer peripheral part 22 in the state which reduced the elastic body 5 to the vertical direction and the width direction with the jig etc. which are not shown in figure, respectively. At this time, the leg portions 53 and 53 are compressed in the protruding direction, and the protruding length is shortened. Thereafter, by removing the jig described above, the elastic body 5 expands due to the elasticity of the elastic body 5, and the lower surfaces 54c and 54c of the fitting portions 54 and 54 are pressed against the fitting recesses 26 and 26, and the rebound buffer portion. The upper surface of 51 is pressed against the lower surface of the rebound stopper portion 25, and the side surfaces 54 b and 54 b of the fitting portions 54 and 54 of the elastic body 5 are pressed against the fitting recesses 26 and 26, and the legs 53 and 53 are compressed. Power is granted.

As shown in FIG. 3, the pair of protrusions 56, 56 engage with the recess 25 a of the bracket 2 in the process of press-fitting the main body member 3. In other words, the protrusion 56 is accommodated in the recess inner space 25b of the recess 25a. At this time, the height D1 of the recess 25a (the vertical dimension from the lower surface of the rebound stopper 25 to the tip of the recess 25a) is the vertical dimension D2 of the projection 56 (from the upper surface of the rebound buffer 51 to the tips of the projections 56, 56). The width dimension in the axial direction of the recess 25a is larger than the width dimension in the axial direction of the protrusion 56. That is, in the engaged state of the protrusions 56 and 56 and the recess 25a, a gap is formed between the protrusions 56 and 56 and the recess 25a in the axial direction and the height direction.

  Next, the operation of the vibration isolator 1 having the above configuration will be described.

First, when the main body member 3 is press-fitted into the bracket 2, the pair of protrusions 56 and 56 are engaged with the recess 25 a of the bracket 2. Thereby, the main body member 3 is restricted from moving in the axial direction with respect to the bracket 2.
Next, the bracket 2 is attached to a vehicle body (not shown), and the attachment portion 4 is attached to an engine (not shown). As a result, an engine load (static load) (not shown) acts on the mounting portion 4, and the mounting portion 4 is displaced downward relative to the bracket 2. As a result, the legs 53 and 53 are compressed and shortened, and the rebound buffer 51 is separated from the rebound stopper 25 and a predetermined gap is formed between the upper surface of the rebound buffer 51 and the lower surface of the rebound stopper 25. Is formed. At this time, the protrusions 56 and 56 are separated from the recess inner space 25b of the recess 25a and the engaged state is released. That is, the tips of the protrusions 56 and 56 are located below the lower surface of the rebound stopper portion 25.

  Next, when engine vibration (not shown) is input to the attachment portion 4, the attachment portion 4 is displaced relative to the bracket 2. At this time, the vibration is absorbed by the elastic body 5 and the vibration transmitted to the vehicle body (not shown) via the bracket 2 is reduced. Further, since the main body member 3 is assembled in the outer peripheral portion 22 of the bracket 2 in a state where the leg portions 53 and 53 are compressed, it is difficult for a tensile force to act on the leg portions 53 and 53 even during rebound, and the leg portion 53. 53 are easily maintained in a compressed state. Therefore, even when rebounding, the fitting portion 54 is pressed against the fitting recess 26, and the side surface 54 b and the lower surface 54 c of the fitting portion 54 are not separated from the fitting recess 26, and the side surface of the fitting portion 54. 54 b and the lower surface 54 c are in pressure contact with the fitting recess 26.

Further, when the engine (not shown) vibrates with a large amplitude in the vertical direction and the mounting portion 4 is greatly displaced downward, the bound buffer portion 50 of the elastic body 5 contacts the bound stopper portion 23.
On the contrary, when the attachment portion 4 is largely displaced upward, the rebound buffer portion 51 of the elastic body 5 contacts the rebound stopper portion 25. Thereby, the displacement of the attachment portion 4 in the vertical direction is restricted, and the expansion / contraction deformation of the leg portions 53 and 53 due to the large vibration is restricted.
The main body member 3 is moved to such an extent that the compressed state of the leg portions 53 and 53 is maintained even when the attachment portion 4 is largely displaced upward so that a large vibration is input and the rebound buffer portion 51 contacts the rebound stopper portion 25. By compressing and assembling within the outer peripheral portion 22 of the bracket 2, the leg portions 53, 53 are not subjected to a tensile force and are always subjected to a compressive force, and the fitting portion 54 is pressed against the fitting recess 26. State.
At this time, since the protrusions 56 are formed smaller in the height direction and the axial direction than the recess 25a, the protrusion 56 also when the rebound buffer 51 of the elastic body 5 contacts the rebound stopper 25. , 56 are less likely to abut the bracket 2 and hardly affect the spring characteristics of the elastic body 5 after the vehicle is assembled.

Further, for example, when the vehicle suddenly accelerates or decelerates suddenly, an engine (not shown) is displaced in the width direction (vehicle front-rear direction), and the mounting portion 4 is largely displaced in the width direction relative to the bracket 2. Then, the side buffer parts 52, 52 of the elastic body 5 come into contact with the side stopper part 24. Thereby, the displacement to the width direction of the attaching part 4 is controlled, and the expansion-contraction deformation of the leg parts 53 and 53 accompanying the vibration of the width direction is restrict | limited.
The main body is such that the compressed state of the leg portions 53 and 53 is maintained even when the mounting portion 4 is greatly displaced in the width direction as the large vibration is input and the side buffer portions 52 and 52 come into contact with the side stopper portion 24. By compressing and assembling the member 3 into the outer peripheral portion 22 of the bracket 2, the leg portions 53, 53 are not subjected to a tensile force, and a compression force is always applied, and the fitting portion 54 is brought into the fitting recess 26. It can be set as the state pressed.
At this time, since the concave portion 25a is provided in a long shape along the circumferential direction of the outer peripheral portion, even if acceleration or deceleration is applied in addition to the vertical direction, the protrusions 56 and 56 contact the bracket 2. It is difficult to touch, and it is difficult to affect the spring characteristics of the elastic body after the vehicle is assembled.

Further, for example, when the vehicle suddenly curves, the engine (not shown) may be displaced in the axial direction (the vehicle left-right direction), and the mounting portion 4 may be displaced in the axial direction relative to the bracket 2. Since the tips of the projections 56, 56 are located below the lower surface of the rebound stopper 25, the projections 56, 56 are unlikely to contact the bracket 2 and affect the spring characteristics of the elastic body after the vehicle is assembled. It is hard to give.
At this time, the movement of the fitting portion 54 to the outside in the axial direction relative to the fitting recess 26 is restricted by the retaining portion 29. Thereby, it is prevented that the main body member 3 slips out from the inner side of the bracket 2 (outer peripheral portion 22) to the outer side in the axial direction.

Further, since the retaining portion 29 is in contact with the surface 54d of the fitting portion 54, and the retaining portion 29 is not pressed against the surface 53b of the leg portion 53, the surface 53b of the leg portion 53 is damaged by the retaining portion 29. It can prevent sticking and can suppress the performance fall of the elastic body 5, and the lifetime fall.
Further, a step 55 is formed between the surface 54d of the fitting portion 54 and the surface 53b of the leg portion 53. Even if the surface 54d of the fitting portion 54 is scratched by the retaining portion 29, the scratch is damaged. Since it does not progress easily to the leg part 53, it can prevent that the leg part 53 forms a crack, and can suppress the performance fall of the elastic body 5, and a lifetime fall.

  According to the above-described vibration isolator 1, the axial movement of the elastic body 5 with respect to the bracket 2 can be reliably regulated in a state before being attached to the vehicle body, and the vibration isolator 1 is assembled to the vehicle. When the engine load is input, the protrusions 56 and 56 are separated downward from the recess inner space 25b of the recess 25a. Therefore, even if a large displacement is input in the axial direction, the protrusion 56 56 are unlikely to affect the spring characteristics of the elastic body.

  In the vibration isolator 1 described above, the bracket 2 is formed of a single cylindrical part, and the main body member 3 is assembled to the bracket 2 by press-fitting the main body member 3 inside the bracket 2. The number can be reduced.

As mentioned above, although the embodiment of the vibration isolator according to the present invention has been described, the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the gist thereof.
For example, in the above-described embodiment, the bound stopper portion 23 and the side stopper portions 24, 24 are formed on the bracket 2. However, in the present invention, the bound stopper portion 23 and the side stopper portion 24 may be omitted. Is possible.

  Further, in the above-described embodiment, the elastic body 5 is provided with the bounce buffer portion 50 and the side buffer portions 52 and 52 on both sides. However, in the present invention, these buffer portions 50 and 52 can be omitted. It is. For example, the buffer part 50 and the buffer part 52 may be provided on the inner peripheral surface of the outer peripheral part 22, and the mounting part 4 may be in direct contact with the buffer part 50 and the buffer part 52.

  In the above-described embodiment, the bracket 2 having the rectangular tube-shaped outer peripheral portion 22 is provided. However, the bracket of the present invention is not limited to this, and for example, the outer peripheral portion having a cylindrical shape or a U-shape in cross section. It is also possible to use a bracket or the like having

  In the embodiment described above, the bracket 2 is connected to the vehicle body (vibration receiving portion) and the mounting portion 4 is connected to the engine (vibration generating portion). However, in the present invention, the bracket 2 is connected to the engine (vibration generating portion). The attachment portion 4 may be connected to the vehicle body (vibration receiving portion).

  Further, in the above-described embodiment, the elastic body 5 is provided with a pair of leg portions 53, 53 disposed symmetrically with respect to the vertical center line, and the pair of leg portions 53, 53 is the attachment portion 4. Although it arrange | positions at the lower side and is arrange | positioned by the arrow shape from an axial direction, it is changeable in the direction of the leg part in this invention. For example, when a vibration generating part such as an engine is attached to the bracket 2 and a vibration receiving part such as a vehicle body is attached to the attachment part 4, the leg part is disposed on the upper part of the attachment part 4. The leg is arranged in a letter shape. In the present invention, one or three or more leg portions may be provided, and the plurality of leg portions 53 may not be arranged symmetrically with respect to the vertical center line of the attachment portion 4.

  In the above-described embodiment, the protrusion 56 is formed in the shape of a truncated pyramid that integrally protrudes upward from the rebound buffer 51, but the shape of the protrusion 56 in the present invention is not limited to this. . For example, the protrusion 56 may be cylindrical or hemispherical, and can be formed long in the width direction. In the present invention, two protrusions 56 are disposed, but one protrusion 56 may be provided, or three or more protrusions 56 may be provided. Moreover, although the two protrusions 56 in the present invention are arranged side by side in the width direction at the center in the axial direction of the rebound buffer 51, a plurality of protrusions 56 may be arranged apart from each other in the axial direction.

Further, in the above-described embodiment, the concave portion 25a of the bracket 2 is formed in an elongated shape along the circumferential direction of the outer peripheral portion 22 at the center in the axial direction of the outer peripheral portion 22, and is formed in a substantially U-shape. Although it forms continuously over the full length of the board 21, the recessed part 25a in this invention should just be a shape which the protrusion part 56 engages, and is not restricted to this. For example, the recess 25a may be formed only in the rebound stopper portion 25. The protrusions 56 may be formed so as to surround the protrusions 56, and the plurality of recesses 25 a may be engaged with the protrusions 56.

  Further, the vibration isolator according to the present invention is not limited to the engine mount of the vehicle, but can be applied to the vibration isolator other than the engine mount. For example, the present invention can be applied to a mount of a generator mounted on a construction machine, or can be applied to a mount of a machine installed in a factory or the like.

  In the above-described embodiment, the lower plate 20 and the upper plate 21 are integrally welded, the bracket 2 is made of a single component, and the main body member 3 is press-fitted inside the bracket 2 (outer peripheral portion 22). However, in the present invention, a plurality of parts can be assembled to form a bracket. For example, a bracket formed by joining two parts (the lower plate 20 and the upper plate 21) by caulking or the like may be used. In this case, the main body member 3 is sandwiched between these two parts and these are caulked. The main body member 3 can be assembled to the bracket 2 by fixing.

  In addition, in the range which does not deviate from the main point of this invention, it is possible to replace suitably the component in above-mentioned embodiment with a well-known component, and you may combine the above-mentioned modification suitably.

DESCRIPTION OF SYMBOLS 1 Vibration isolator 2 Bracket 3 Main body member 4 Mounting part 5 Elastic body 22 Outer peripheral part 25 Rebound stopper part 25a Recessed part (interposition part positioning part)
29 Stopping part (Leg positioning part)
51 Rebound buffer (intervening part)
53 Leg 56 Projection (interposition part positioning part)

Claims (3)

A bracket that has an outer peripheral part that is attached to one of the vibration generating part and the vibration receiving part, and that is attached to the other of the vibration generating part and the vibration receiving part and forms an internal space that houses at least a part of the mounting part. When,
A leg that is disposed in the inner space and is attached to the mounting portion and is press-fitted and fixed to the bracket to elastically connect the bracket and the mounting portion, and is disposed on one side of the mounting portion;
An interposition part disposed in the internal space and attached to the other side of the attachment part;
A leg positioning part for positioning the leg with respect to the axial direction of the outer peripheral part of the bracket;
An interposition part positioning part for positioning the interposition part in the bracket with respect to the axial direction of the bracket;
Anti-vibration device with 2. The vibration isolator according to claim 1, wherein the interposition portion positioning portion includes a concave portion in which the inner space side is recessed in the outer peripheral portion, and a protrusion that is formed in the interposition portion and is accommodated in the concave portion. The anti-vibration device according to claim 2, wherein the concave portion is provided in a long shape along a circumferential direction of the outer peripheral portion.

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