JP2013170627A - Vibration control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration control device, which effectively reduces vibration, noise or the like from a vibration generating part with a simple structure and suppresses transmission to a vibration-receiving part, and particularly, which can sufficiently absorb rocking of an engine in vehicle front-rear directions caused by cranking vibration or a starter antitorque occurring when stopping the engine or when starting the engine and which is improved in vibration absorbing performance in a wide range and is applied even to a small-size lightweight automobile.SOLUTION: Ribs of a side stopper plate 5 has: a plurality of surface side basic ribs 22 extending in directions intersecting an axial open end 6a of a cylindrical part 6; and additional ribs 23 disposed between the surface side basic rib 22 and the surface side basic rib 22 and extending in the same directions as the surface side basic ribs 22. The surface side basic rib 22 is formed to have such a protruding length that a tip part thereof is in contact with the axial open end 6a of the cylindrical part 6, while the additional rib 23 is formed to be lower than a height position of the tip part of the surface side basic rib 22 and to have such a protruding length that after the surface side basic ribs 22 are deformed by the axial open end 6a due to a load applied to the side stopper plate 5, the additional ribs come into contact with the axial open end 6a.

Description

  The present invention relates to an anti-vibration device that is used as an engine mount or the like of an automobile and suppresses transmission to a vibration receiving unit such as a vehicle body by absorbing vibration and noise from a vibration generating unit such as an installed engine and transmission.

Conventionally, an anti-vibration device such as an engine mount is disposed between an engine (or transmission) of a power system device that is a vibration generating unit of an automobile and a vehicle body that is a vibration receiving unit. This anti-vibration device is provided in order to suppress the vibrations and noises generated by the engine, the transmission, etc. from being transmitted to the vehicle body as they are.
As an example of such an anti-vibration device, a vehicle body side bracket attached to the vehicle body side and having a resilient vibration absorber accommodated in a cylindrical portion, and a cylinder of the vehicle body side bracket attached to the engine side An engine-side bracket on which a planar suspension arm is formed to be connected to the part, and a plate-like side stopper provided at the axially open end of the cylindrical part of the body-side bracket and formed with a rib. There is something. The side stopper is provided between the cylinder part of the vehicle body side bracket and the suspension arm of the engine side bracket, and is arranged so that the rib contacts the opening end of the cylinder part of the vehicle body side bracket or the suspension arm of the engine side bracket. Has been. The engine-side bracket is suspended on the vehicle body-side bracket via the suspension arm and the cylindrical portion so as to be rotatable about the axis.

  Further, as another example of the vibration isolator, there is one provided with a vibration isolator body having an inner mounting member, an outer mounting member and an elastic body, and a vibration isolator bracket having a stopper member and a bracket member ( For example, see Patent Document 1). In this vibration isolator, an elastic body is disposed between the inner mounting member and the outer mounting member, and the outer mounting member is connected to the vehicle body via the vibration isolator bracket and fixed to the upper surface side of the inner mounting member. The extended portion of the stopper arm is connected to the engine side.

By the way, the vibration caused by the driving vibration of the engine of the automobile and the vibration of the vehicle body is a vertical movement mainly based on the center of gravity of the engine, and for the load perpendicular to the mount shaft, the elastic body of the vibration isolator works, Reduces the transmission of vibrations.
In recent years, an increasing number of automobiles have adopted idling stop technology for improving fuel efficiency, and this technology has also been adopted for small, lightweight, and low-cost automobiles. In a region where the crank rotation is slow (for example, 400 rpm or less) at the time of engine stop and engine start, cranking vibration and starter counter-torque are generated, and the engine swings greatly in the vehicle front-rear direction. Since this swing is different from the vibration direction and amplitude in the crank rotation in the normal operation, the vibration isolator as the engine mount is required to have a wide range of vibration absorption. In addition, the same problem as described above also occurs in the swinging of the engine in the longitudinal direction of the vehicle due to torque fluctuation at the time of shift change.

JP 2011-256958 A

However, in the example of the conventional vibration isolator described above, the rib of the side stopper abuts against the body side bracket or the engine side bracket and is crushed so that a repulsive force is applied to absorb a certain range of vibration. , Cranking vibration that occurs when the engine is stopped and when the engine is started, and vibrations in the longitudinal direction of the vehicle due to the counter-torque of the starter cannot be sufficiently absorbed. Propagation could not be suppressed.
Further, in another example of the conventional vibration isolator, the repulsive force is increased stepwise by providing a step in the elastic body. However, in the structure of the entire surface between the rib and the plate flat portion, it is small. It is difficult to absorb the load, and it is necessary to take measures such as reducing the elastic modulus of the ribs. As a result, the rib shape is complicated, and there is a possibility that the manufacturing process becomes complicated because it is necessary to bond the constituent materials. Moreover, this conventional anti-vibration device absorbs the rocking of the engine in the longitudinal direction of the vehicle by adopting a large mounting bracket and a large elastic body if it is a high-priced vehicle with a wide engine room. Although vibration can be reduced, the design layout becomes difficult for compact small cars and light cars, which has been a problem in reducing vibration in a wide range.

  The present invention has been made in view of such a situation, and its purpose is to reduce vibrations and noises from the vibration generating unit effectively with a simple structure and suppress transmission to the vibration receiving unit, In particular, it can sufficiently absorb vibrations in the longitudinal direction of the vehicle due to cranking vibration and starter counter-torque that occur when the engine is stopped and when the engine is started, improving the vibration absorption performance in a wide range, and can be applied to small and light vehicles. An object of the present invention is to provide an anti-vibration device capable of performing the above.

  In order to solve the above-described problems of the prior art, the present invention provides a first mount bracket that is attached to one of a vibration generating portion and a vibration receiving portion, and in which a vibration absorber is housed in a cylindrical portion, and the vibration generation A second mounting bracket attached to the other of the first portion and the vibration receiving portion, and having a planar suspension arm connected to the cylindrical portion, and an axially open end of the cylindrical portion of the first mount bracket And an elastic side stopper plate having a rib formed on a surface thereof, wherein the side stopper plate is formed between the cylindrical portion of the first mount bracket and the suspension arm of the second mount bracket. In the vibration isolator provided between and disposed so that the rib contacts the axially open end of the cylindrical portion or the suspension arm, the side strike The ribs of the pad plate are arranged between a plurality of surface side basic ribs extending in a direction intersecting the axial opening end of the cylindrical portion, the surface side basic ribs and the surface side basic ribs, and the surface The surface side basic rib is formed to have a protruding length in which the tip end portion comes into contact with the axial opening end of the cylindrical portion. In addition, the additional rib is lower than the height position of the front end portion of the surface side basic rib, the load is applied to the side stopper plate, and the surface side basic rib is deformed by the axial opening end of the cylindrical portion. It is formed in a protruding length that comes into contact with the axially open end of the cylindrical portion later.

  Further, in the present invention, on the back side of the side stopper plate, the back side basic rib whose tip end abuts on the suspension arm of the second mount bracket is located at a position that coincides with the front side basic rib. Is provided.

  Further, in the present invention, on the back side of the side stopper plate, the back side where the front end part contacts the suspension arm of the second mount bracket is located at a position coincident with the front side basic rib and the additional rib. Each basic rib is provided.

  In the present invention, at least three surface side basic ribs are provided.

  In the present invention, the surface-side basic rib and the additional rib are arranged so as to be symmetrical with respect to the load direction of the second mount bracket to the first mount bracket.

  As described above, the vibration isolator according to the present invention is attached to one of the vibration generating portion and the vibration receiving portion, and includes the first mount bracket in which the vibration absorber is housed in the cylindrical portion, the vibration generating portion, and the vibration receiving portion. A second mount bracket attached to the other of the vibration receiving portions and formed with a planar suspension arm connected to the cylindrical portion; and provided at an axially open end of the cylindrical portion of the first mount bracket. And an elastic side stopper plate having ribs formed on the surface, the side stopper plate being provided between the tubular portion of the first mount bracket and the suspension arm of the second mount bracket. And the rib is disposed so as to contact the axially open end of the cylindrical portion or the suspension arm, and the rib of the side stopper plate is Is arranged between a plurality of surface side basic ribs extending in a direction intersecting the axial opening end of the cylindrical portion, the surface side basic ribs and the surface side basic ribs, and the surface side basic ribs The front surface side basic rib is formed to have a protruding length that abuts against the axially open end of the cylindrical portion, and the additional rib extends in the same direction. The rib is lower than the height position of the front end portion of the surface-side basic rib, the load is applied to the side stopper plate, and the cylindrical shape after the surface-side basic rib is deformed by the axially open end of the cylindrical portion. Since it is formed in the protruding length that contacts the axially open end of the part, the following effects can be obtained.

That is, in the vibration isolator of the present invention, when a small load directed from the outside toward the cylindrical portion of the first mount bracket is applied to the suspension arm of the second mount bracket, the side stopper plate is pressed by the suspension arm, and the first mount The contact portion of the surface-side basic rib that intersects the axially open end of the cylindrical portion of the bracket is locally deformed, and the load can be absorbed. Further, a larger load is applied to the suspension arm of the second mount bracket from the outside toward the tubular portion of the first mount bracket, the side stopper plate is further pressed by the suspension arm, and the tubular portion of the first mount bracket. When the deformation of the contact portion of the surface side basic rib that intersects the axial opening end of the first mounting bracket proceeds, the portion of the additional rib that intersects the axial opening end of the cylindrical portion of the first mount bracket comes into contact It is possible to sink the rib. As a result, the number of ribs in contact with each other increases, so that the repulsive force of the side stopper plate increases and the repulsive force per unit displacement amount also increases, and displacement against a large load can be suppressed. In particular, the vibration isolator of the present invention does not require sinking of an additional rib with a low height, and if it is used to increase the repulsive force due to the deformation of the surface side basic rib at an early stage, the effect of load absorption is improved. It can be demonstrated. Moreover, after the additional rib comes into contact with the axially open end of the cylindrical portion of the first mount bracket, all the contact ribs can receive the load at the same rate.
Therefore, when the vibration isolator of the present invention is used as an engine mount of a car, vibration and noise from the engine of the vibration generating part are effectively reduced, and transmission of the vibration receiving part to the vehicle body is suppressed. It can absorb cranking vibration generated when the engine is stopped and when the engine is started, and the swinging of the engine in the longitudinal direction of the vehicle due to the counter-torque of the starter. Both vibration absorption and regulation of large variations can be achieved regardless of whether a large or small external load is applied. In addition, it is possible to ensure the driver's and passenger's comfort with respect to vibration and noise, and it can be applied to a small and light automobile with a simple and compact structure.

Further, in the present invention, on the back side of the side stopper plate, the back side basic rib whose tip end abuts on the suspension arm of the second mount bracket is located at a position that coincides with the front side basic rib. Because it is provided, when a small load directed from the outside to the cylindrical part of the first mount bracket is applied to the suspension arm of the second mount bracket, the back side basic rib is pressed by the flat part of the suspension arm by the line and deformed. In addition, the side stopper plate is pressed, and the contact portion of the surface side basic rib that intersects the axially open end of the cylindrical portion of the first mount bracket is locally deformed to absorb the load. It becomes. Further, a load larger than this is applied from the outside to the suspension arm of the second mount bracket toward the cylindrical portion of the first mount bracket, and the back side basic rib and the side stopper plate are further pressed by the suspension arm, and the first mount The portion of the additional rib that intersects the axial opening end of the cylindrical portion of the first mount bracket when the contact portion of the surface side basic rib that intersects the axial opening end of the cylindrical portion of the bracket advances. Can be brought into contact with each other, and the additional rib can sink. As a result, the number of ribs in contact with each other increases, so that the repulsive force of the side stopper plate increases and the repulsive force per unit displacement amount also increases, and displacement against a large load can be suppressed. Moreover, after the additional rib comes into contact with the axially open end of the cylindrical portion of the first mount bracket, all the contact ribs can receive the load at the same rate.
Further, in the vibration isolator of the present invention, when the deformation of the front side basic rib proceeds, there is no back side basic rib on the opposite side of the additional rib, and the side stopper plate of this part is deformed, and the suspension arm Since there is little decrease in the height of the back-side basic rib that is in contact with the flat portion, it is possible to alleviate the sudden rise in repulsive force due to the contact of the additional rib. When a larger external load is applied, the front-side basic rib, the additional rib, and the back-side basic rib are sufficiently deformed to serve as a repulsive force of the side stopper plate itself, thereby suppressing displacement against a large load more effectively. Can do.
Therefore, when the vibration isolator of the present invention is used as an automobile engine mount or the like, a greater effect can be obtained as compared with the vibration isolator of the above invention.

  Further, in the present invention, on the back side of the side stopper plate, the back side where the front end part contacts the suspension arm of the second mount bracket is located at a position coincident with the front side basic rib and the additional rib. Since the basic ribs are respectively provided, a load from the outside toward the cylindrical portion of the first mount bracket is applied to the suspension arm of the second mount bracket, and the additional rib is an opening end in the axial direction of the cylindrical portion of the first mount bracket. After the contact, the back side basic rib, the front side basic rib and the additional rib can all receive the load at the same rate, and elastic deformation of the back side basic rib can also be expected. That is, according to the vibration isolator of the present invention, it is possible to set a stronger repulsive force than that of the invention in which the back surface side basic rib is not provided on the back surface side of the side stopper plate, while the back surface side surface side of the side stopper plate It is possible to set a repulsive force weaker than that of the invention in which the back side basic rib is provided only at a location that matches the basic rib, and it is possible to absorb a wide range of vibrations and noises.

  Further, in the present invention, since the surface side basic rib is provided at least three or more, when a load directed from the outside toward the cylindrical portion of the first mount bracket is applied to the suspension arm of the second mount bracket, The load can be effectively absorbed by the deformation of the surface side basic rib.

  Furthermore, in the present invention, the surface side basic rib and the additional rib are arranged so as to be symmetrical with respect to the load direction of the second mount bracket to the first mount bracket. When a load toward the cylindrical part of the first mount bracket is applied to the suspension arm of the second mount bracket, each of the surface side basic rib and the additional rib is deformed by receiving the load at the same rate, and the load is effectively reduced. Can be absorbed. In particular, when the axial opening end of the cylindrical portion of the first mount bracket is circular, the surface side basic ribs and the additional ribs are arranged radially around the axis and orthogonal to the axial opening end. The local deformation of the surface side basic rib and the additional rib can be surely caused. In addition, the distance between the surface-side basic rib and the additional rib is increased on the radially outer peripheral side of the side stopper plate, the plate portion of the additional rib is easily deformed, and a sudden rise in repulsive force can be mitigated.

When the vibration isolator which concerns on 1st Embodiment of this invention is used as an engine mount of a motor vehicle, it is a perspective view which shows the state before attachment to an engine, a transmission, etc., before attachment. It is a perspective view which expands and shows the vibration isolator in FIG. (A) is a perspective view showing a state in which the first mount bracket and the side stopper plate constituting the vibration isolator of FIGS. 1 and 2 are assembled, and (b) is the first mount bracket and side stopper of (a). It is a perspective view which shows the state before a plate is assembled | attached. Schematic showing the positional relationship between the axial opening end of the cylindrical portion of the first mount bracket, the suspension arm of the second mount bracket, and the side stopper plate in a state where the vibration isolator according to the first embodiment of the present invention is assembled. FIG. It is a perspective view which shows the state which assembled | attached the 1st mount bracket and side stopper plate which comprise the vibration isolator which concerns on 2nd Embodiment of this invention. (A) is the position of the axially open end of the cylindrical portion of the first mount bracket, the suspension arm of the second mount bracket, and the side stopper plate in the state where the vibration isolator according to the second embodiment of the present invention is assembled. The schematic diagram which shows a relationship, (b) is the schematic diagram which shows the state which the back surface side basic rib and front surface side rib of the side stopper plate deform | transformed when external load was applied. The outline which shows the positional relationship of the axial direction opening end of the cylindrical part of a 1st mount bracket, the suspension arm of a 2nd mount bracket, and a side stopper plate in the state in which the vibration isolator which concerns on 3rd Embodiment of this invention was assembled | attached. FIG.

  Hereinafter, the present invention will be described in detail based on illustrated embodiments.

[First Embodiment]
1 to 4 show a vibration isolator 1 according to a first embodiment of the present invention. As shown in FIG. 1, the vibration isolator 1 is for attaching and supporting an engine 2 that is a vibration generating portion mounted on an automobile to a side member (not shown) on the vehicle body side that is a vibration receiving portion. It is used as an engine mount.
For this reason, the vibration isolator 1 according to the embodiment of the present invention includes a first mount bracket 3 attached to the vehicle body (vibration receiving portion) side and an engine (vibration generating portion) 2 as shown in FIGS. A second mount bracket 4 attached to the side, and an elastic side stopper plate 5 disposed in association with the first mount bracket 3 and the second mount bracket 4. The engine 2 is suspended by connecting the second mount bracket 4 to the bracket 3 via a vibration absorber described later.

As shown in FIGS. 1 to 3, the first mount bracket 3 of the present embodiment has a horizontal cylindrical portion (see FIG. 1) having a circular (or square) axial opening end 6 a at a position in the vehicle front-rear direction. (Cylindrical portion) 6 and a support piece 7 in the vehicle width direction having a facing wall 7b raised with a lower surface portion 7a fixed to the vehicle body side by bolting. The intermediate portion is supported while being arranged in the horizontal direction by sandwiching and fixing the intermediate portion to the upper portion of the opposing wall 7 b of the support piece 7. A bolt hole 9 into which the bolt 8 is inserted is formed before and after the lower surface portion 7 a of the support piece 7.
In addition, a vibration absorber (mount rubber) 10 that is an elastic body that can be deformed in the axial direction and the radial direction is housed and disposed in a cavity inside the cylindrical portion 6, and is suspended so as to be rotatable around the axis. For this reason, the vibration absorber 10 is fitted in the casing 11, and a through hole 13 is provided in the center of the vibration absorber 10 so as to penetrate the support shaft 12 extending in the horizontal direction. . Boss portions 10 a that hold the side stopper plates 5 are provided on both end surfaces of the vibration absorber 10.

On the other hand, as shown in FIGS. 1 and 2, the second mount bracket 4 of the present embodiment includes a flat surface-shaped base portion 14 fixed to the upper portion of the engine 2 by bolting, and front and rear ends of the base portion 14. And a suspension arm 15 integrally formed so as to extend obliquely downward.
The base portion 14 is formed to extend in the horizontal direction so that the cylindrical portion 6 of the first mount bracket 3 can be disposed between the suspension arms 15 located at the front and rear. Two bolts 16 that are provided on the second side and whose upper end screw part is screwed into the nut 16a, and three insertion holes 18 for inserting one bolt 17 that is fastened to the engine 2 are drilled at intervals in the front-rear direction. It is installed.
The suspension arm 15 is provided on both sides of the front and rear ends of the base portion 14, and suspends the cylindrical portion 6 of the first mount bracket 3 that houses the vibration absorber 10. Therefore, a shaft hole 19 through which the support shaft 12 through which the through hole 13 of the vibration absorber 10 is inserted is formed at the front end portion of each suspension arm 15 so as to face the suspension arm 15. The support shaft 12 which is inserted from one shaft hole 19 of the suspension arm 15 and protrudes from the other shaft hole 19 is fixed by screwing a nut 20 to a screw portion at the tip. Further, the opposing inner wall surface of the suspension arm 15 is formed in a flat planar shape so as to contact the side stopper plate 5.

  As shown in FIGS. 1 to 4, the side stopper plate 5 of the present embodiment is a stopper provided in correspondence with the axial opening end portions 6 a located on both sides of the cylindrical portion 6 of the first mount bracket 3. The first mount bracket 3 is disposed between the cylindrical portion 6 and the suspension arm 15 of the second mount bracket 4. Therefore, the side stopper plate 5 is formed in a disk shape having a size capable of covering the periphery of the axially open end 6a, and a boss hole 21 is formed in the center thereof. Is held in the boss 10a of the vibration absorber 10.

Further, on the surface of the plate portion of the side stopper plate 5 located on the cylindrical portion 6 side of the first mount bracket 3, as shown in FIGS. 2 to 4, the axially open end of the cylindrical portion 6 of the first mount bracket 3. A plurality of (at least three or more) surface-side basic ribs 22 and a plurality (at least two or more) additional ribs 23 that can come into contact with the portion 6a are integrally formed. 22 and the additional rib 23 are comprised so that it can deform | transform when the external load to the axial center direction of the cylindrical part 6 is applied.
At least three of the surface side basic ribs 22 are arranged radially at intervals in the circumferential direction on one side half centered on the axial center, and intersect with the axially open end 6a of the cylindrical portion 6 of the first mount bracket 3. It extends along the direction. Moreover, the front-side basic rib 22 is formed in a substantially triangular shape in cross section with a protruding length at which the tip end comes into contact with the axially open end 6 a of the cylindrical portion 6.
On the other hand, the additional ribs 23 are disposed between the surface-side basic ribs 22 and the surface-side basic ribs 22, and are in the same direction as the surface-side basic ribs 22, and at least two of the additional ribs 23 are on one side half centered on the axis. They are arranged radially with a gap in the circumferential direction. That is, the additional rib 23 also extends along the direction intersecting the axial opening end 6 a of the cylindrical portion 6 of the first mount bracket 3. In addition, the additional rib 23 is set to be lower than the height of the front end portion of the surface side basic rib 22, an external load is applied to the side stopper plate 5, and the surface side basic rib 22 is in the axial direction of the cylindrical portion 6. It is formed in a substantially trapezoidal cross section with a protruding length that abuts against the axially open end 6a of the cylindrical portion 6 after being deformed by the open end 6a.

  Furthermore, the surface side basic rib 22 and the additional rib 23 of the present embodiment are provided in the direction of the load of the second mount bracket 4 on the axially open end 6a of the cylindrical portion 6 of the first mount bracket 3 (arrow F in FIG. 4). Are arranged symmetrically with respect to (direction). With such an arrangement, when a load directed from the outside toward the cylindrical portion 6 of the first mount bracket 3 is applied to the suspension arm 15 of the second mount bracket 4, the surface side basic rib 22 formed on the side stopper plate 5 and the additional Each of the ribs 23 is configured to be deformed by receiving a load at the same rate.

Next, an example of a procedure for assembling the vibration isolator 1 according to the first embodiment of the present invention and attaching it to the vehicle body (not shown) and the engine 2 will be described.
First, as shown in FIG. 3B, the cylinder of the first mount bracket 3 in which the vibration absorber 10 placed in the casing 11 is fixed to the opposing wall 7b of the support piece 7 from the one axial opening end 6a. It is inserted into the part 6 and stored. Next, while the plate portion surface on which the surface-side basic ribs 22 and the additional ribs 23 are formed is directed toward the axial opening end 6a side, the side stopper plate 5 is moved outward from the axial opening end 6a and the outside of the vibration absorber 10. The side stopper plate 5 is held on the vibration absorber 10 by placing the boss hole 21 in the boss portion 10a (see FIG. 3A). In this state, as shown in FIGS. 1 and 2, the cylindrical portion 6 and the side stopper plate 5 of the first mount bracket 3 are disposed between the suspension arms 15 of the second mount bracket 4, and the support shaft 12 is disposed in the suspension arm. 15 is inserted through one of the shaft holes 19 through the through-hole 13 of the vibration absorber 10 and the boss hole 21 of the side stopper plate 5 and is taken out from the other shaft hole 19 of the suspension arm 15, and a nut 20 is fastened to the screw portion at the tip. For example, the second mount bracket 4 is connected to the first mount bracket 3 so as to be pivotable about the axis, and the vibration isolator 1 is assembled.
Thereafter, while inserting the insertion hole 18 of the base portion 14 through the bolt 16 on the engine 2 side, the base portion 14 is placed on a predetermined position on the upper portion of the engine 2 to fasten the nut 16a, and the bolt 17 is screwed from above to be tightened. Thus, the second mount bracket 4 is fixed to the engine 2 side. Further, if the first mount bracket 3 is attached to the vehicle body side by setting the support piece 7 at a predetermined position on the vehicle body side and inserting and tightening the bolt 8 into the bolt hole 9 of the lower surface portion 7a, the upper portion of the engine 2 is It is attached to the vehicle body via the vibration isolator 1.

In the vibration isolator 1 according to the first embodiment of the present invention configured as described above, as shown in FIG. 1, when vibration in the arrow X direction is input from the engine 2 with a small load, the arrow F in FIG. Surface-side basic ribs that are loaded in the direction and are pressed by the suspension arm 15 of the second mount bracket 4 to cross the axial opening end 6a of the cylindrical portion 6 of the first mount bracket 3 The 22 contact portions are locally elastically deformed. This elastic deformation absorbs the load and attenuates the input vibration.
Further, when a load larger than this (for example, cranking vibration or the like) is input in the direction of arrow X, the side stopper plate 5 is further pressed by the suspension arm 15 of the second mount bracket 4, and the first mount bracket 3 The additional rib 23 that intersects the axially open end 6a of the cylindrical portion 6 comes into contact and can sink, and is elastically deformed locally. The load is absorbed by the elastic deformation of the surface-side basic ribs 22 and the additional ribs 23, and the input vibration is attenuated.
On the other hand, when vibration in the arrow Y direction (engine vibration, vehicle body swing vibration) is input from the engine 2 or the vehicle body, the vibration absorber 15 in the cylindrical portion 6 of the first mount bracket 3 is elastically deformed and the second The mount bracket 4 rotates about the support shaft 12. Due to this elastic deformation and rotation, the input vibration is attenuated.
Therefore, when the vibration isolator 1 according to the first embodiment of the present invention is used as an engine mount or the like of an automobile, vibrations and noises from the engine 2 of the vibration generating unit are effectively reduced to reduce vibration. Transmission of the engine 2 to the vehicle body, absorption of cranking vibration generated when the engine is stopped and when the engine is started, and vibration of the engine 2 in the front-rear direction of the vehicle due to the counter-torque torque can be absorbed. Even if it is hung, it can be handled smoothly and the vibration absorption performance can be improved.

[Second Embodiment]
5 and 6 show a vibration isolator 1a according to a second embodiment of the present invention.
In the vibration isolator 1a of the second embodiment, the back surface of the plate portion of the side stopper plate 5 is such that the front end is in contact with the suspension arm 15 of the second mount bracket 4 as shown in FIGS. The ribs 22a are provided at locations where the ribs 22a coincide with the surface side basic ribs 22, respectively. These back-side basic ribs 22a have the same shape, size, function, and the like as the front-side basic ribs 22, and at least three of them on one side half centering on the axial center are radially spaced apart in the circumferential direction. And extends along a direction intersecting the axially open end 6a of the cylindrical portion 6 of the first mount bracket 3. Other configurations are the same as those in the first embodiment, and the same members are denoted by the same reference numerals.

In the vibration isolator 1a according to the second embodiment of the present invention configured as described above, as shown in FIG. 1, when vibration in the arrow X direction is input from the engine 2 with a small load, the arrow F in FIG. The back surface side basic rib 22a of the side stopper plate 5 is pressed by the flat portion of the suspension arm 15 of the second mount bracket 4 and elastically deformed, and the shaft of the cylindrical portion 6 of the first mount bracket 3 becomes a load in the direction. The contact portion of the surface side basic rib 22 that intersects the direction opening end 6a is locally elastically deformed. The load is absorbed by the elastic deformation of the basic ribs 22 and 22a on both surfaces of the plate portion, and the input vibration is attenuated.
When a load larger than this (for example, cranking vibration or the like) is input, the side stopper plate 5 is further pressed by the suspension arm 15 of the second mount bracket 4, and the cylindrical portion 6 of the first mount bracket 3 is pressed. The additional ribs 23 intersecting the axial opening end 6a come into contact with each other and can sink and locally elastically deform. The load is absorbed by the elastic deformation of the back-side basic rib 22a, the front-side basic rib 22 and the additional rib 23, and the input vibration is attenuated.
When the deformation of these ribs progresses, the back surface side basic rib 22a is not provided on the opposite side of the additional rib 23, so that the plate portion deforms at this point. Since the back-side basic rib 22a is in contact with a flat surface and the height does not decrease much, the additional rib 23 can sink. As a result, an effect of alleviating the sudden rise of repulsive force due to the contact of the additional rib 23 can be obtained. Other functions and effects are the same as those of the first embodiment.

[Third Embodiment]
FIG. 7 shows a vibration isolator 1b according to a third embodiment of the present invention.
In the vibration isolator 1b of the third embodiment, on the back surface of the plate portion of the side stopper plate 5, as shown in FIGS. 5 and 6, the back surface side base is in contact with the suspension arm 15 of the second mount bracket 4. The ribs 22b are provided at locations that coincide with the surface side basic ribs 22 and the additional ribs 23, respectively. These back-side basic ribs 22b have the same shape, size, function, and the like as the front-side basic ribs 22, and at least five of them on one side half centered on the axial center are radially spaced apart in the circumferential direction. And extends along a direction intersecting the axially open end 6a of the cylindrical portion 6 of the first mount bracket 3. Other configurations are the same as those in the first embodiment, and the same members are denoted by the same reference numerals.

In the vibration isolator 1b according to the third embodiment of the present invention configured as described above, when vibration in the arrow X direction is input from the engine 2 with a small load as shown in FIG. 1, the arrow F in FIG. The back side basic rib 22b of the side stopper plate 5 is pressed by the flat portion of the suspension arm 15 of the second mount bracket 4 and elastically deformed, and the shaft of the cylindrical portion 6 of the first mount bracket 3 is loaded. The contact portion of the surface side basic rib 22 that intersects the direction opening end 6a is locally elastically deformed. The load is absorbed by the elastic deformation of the basic ribs 22 and 22b on both surfaces of the plate portion, and the input vibration is attenuated.
When a load larger than this (for example, cranking vibration or the like) is input, the side stopper plate 5 is further pressed by the suspension arm 15 of the second mount bracket 4, and the cylindrical portion 6 of the first mount bracket 3 is pressed. The additional ribs 23 intersecting the axial opening end 6a come into contact with each other and can sink and locally elastically deform. The load is absorbed by the elastic deformation of the back-side basic rib 22b, the front-side basic rib 22 and the additional rib 23, and the input vibration is attenuated.
As the deformation of these ribs progresses, the back surface side basic rib 22b is provided on the opposite side of the front surface side basic rib 22 and the additional rib 23, and the back surface side basic rib 22b is in contact with the flat surface, so there is little decrease in height. The additional rib 23 can be submerged. Thereby, after the additional rib 23 comes into contact, all the ribs 22b, 22, 23 can receive the load at the same rate, and elastic deformation of the back side basic rib 22b can be expected. It is possible to set a stronger repulsive force than the vibration device 1 and a weaker repulsive force than the vibration isolator 1a of the second embodiment. Other functions and effects are the same as those of the first and second embodiments.

  While the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications and changes can be made based on the technical idea of the present invention.

For example, in the above-described embodiment, the first mount bracket 3 is attached to the vehicle body side and the second mount bracket 4 is attached to the engine 2 side. However, the first mount bracket 3 is attached to the engine 2 side, and the second mount bracket is attached. The structure which attaches 4 to the vehicle body side may be sufficient.
Moreover, as shown in FIG. 1, it replaces with the 1st mount bracket 3 and the 2nd mount bracket 4 in the above-mentioned embodiment, and uses three mount brackets 31, 32, 33, and the above-mentioned embodiment. A vibration isolator 1c similar to the vibration isolator 1, 1a, 1b is attached to the transmission 30 and the vehicle body. The standing upright wall of the intermediate mount bracket 32 corresponds to the suspension arm 15 of the above-described embodiment.
Furthermore, instead of the first mount bracket 3 and the second mount bracket 4 in the above-described embodiment, the side stopper plate 50 having the same structure as the conventional example is provided by using three mount brackets 41, 42, 43. The vibration isolator 100 may be attached to the intermediate portion 2a of the engine 2 and the vehicle body. The standing upright wall of the intermediate mount bracket 42 corresponds to the suspension arm 15 of the above-described embodiment.

1, 1a, 1b, 1c Vibration isolator 2 Engine 3 First mount bracket 4 Second mount bracket 5 Side stopper plate 6 Cylindrical portion (tubular portion)
6a Axial opening end portion 7 Support piece 10 Vibration absorber 10a Boss portion 11 Casing 12 Support shaft 13 Through hole 14 Base portion 15 Suspension arm 19 Shaft hole 20 Nut 21 Boss hole 22 Surface side basic rib 22a, 22b Back side basic rib 23 Additional rib 30 Transmission 31, 32, 33 Mount bracket

Claims (5)

A first mount bracket which is attached to one of the vibration generating part and the vibration receiving part and in which a vibration absorber is housed in the cylindrical part; and is attached to the other of the vibration generating part and the vibration receiving part, and the cylindrical part A second mounting bracket formed with a planar suspension arm to be coupled to the side of the elastic body provided at the axially open end of the cylindrical portion of the first mounting bracket and having a rib formed on the surface thereof A stopper plate, and the side stopper plate is provided between the tubular portion of the first mount bracket and the suspension arm of the second mount bracket, and the rib is opened in the axial direction of the tubular portion. In the vibration isolator arranged so as to contact the end or the suspension arm,
The ribs of the side stopper plate are arranged between a plurality of surface side basic ribs extending in a direction intersecting the axial opening end of the cylindrical portion, and these surface side basic ribs and surface side basic ribs, And it is constituted by having an additional rib extending in the same direction as the surface side basic rib,
The surface-side basic rib is formed with a protruding length at which a tip end comes into contact with an axially open end of the cylindrical portion, and the additional rib is positioned at a height position of the tip of the surface-side basic rib. The side stopper plate is formed with a protruding length that abuts against the axially open end of the cylindrical part after the surface side basic rib is deformed by the axially open end of the cylindrical part. An anti-vibration device characterized by that.   The back side of the side stopper plate is provided with a back side basic rib that is in contact with the suspension arm of the second mount bracket at a position that coincides with the front side basic rib. The vibration isolator according to claim 1, wherein   On the back side of the side stopper plate, a back side basic rib whose tip is in contact with the suspension arm of the second mount bracket is provided at a location that coincides with the front side basic rib and the additional rib. The vibration isolator according to claim 1, wherein:   The vibration isolator according to any one of claims 1 to 3, wherein at least three or more surface side basic ribs are provided.   The said surface side basic rib and the said additional rib are arrange | positioned so that it may become symmetrical with respect to the load direction of the said 2nd mounting bracket with respect to a said 1st mounting bracket. The vibration isolator in any one.

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