JP2021076232A - Vibration control device - Google Patents

Abstract

To suppress generation of noise when vibration is input.SOLUTION: An outer mounting member 11 includes a first end member 17, a second end member 18, and an intermediate member 16, the first end member and the second end member are independently fitted into both end portions in an axial direction, of the intermediate member, a connected portion 35 provided at one of a vibration generating portion and a vibration receiving portion is disposed on one end face of both end faces in the axial direction of a first mounting projection portion 24 disposed on the intermediate member, a second mounting projection portion 25 is disposed on the other end face, insertion holes 11a to which fixing bolts 36 for integrally fixing the first mounting projection portion and the second mounting projection portion, and connecting the first mounting projection portion to the connected portion, are formed on the first mounting projection portion and the second mounting projection portion, and first caulking portions 28 for fastening the first end member are independently formed on the intermediate member and the first mounting projection portion at an interval in a circumferential direction.SELECTED DRAWING: Figure 2

Description

The present invention relates to a vibration isolator that is applied to, for example, automobiles, industrial machines, etc., and absorbs and attenuates vibrations of vibration generating parts such as engines.

Conventionally, a tubular outer mounting member connected to either one of a vibration generating portion and a vibration receiving portion, and an inner mounting member connected to the other and arranged inside the outer mounting member, and an outer side. The liquid chamber between the pair of first main body rubbers and the pair of first main body rubbers, which are connected to the mounting member and the inner mounting member and are arranged at intervals in the axial direction along the central axis of the outer mounting member, is formed. A vibration isolator including a partition member that partitions the first liquid chamber and the second liquid chamber in the axial direction and is formed with a limiting passage that connects the first liquid chamber and the second liquid chamber is known. .. In this vibration isolator, when axial vibration is input, the liquid in the liquid chamber is circulated between the first liquid chamber and the second liquid chamber through the limiting passage to attenuate and absorb the vibration. be able to.
As this type of vibration isolator, for example, as shown in Patent Document 1 below, the outer mounting member is a partition member with a first end member and a second end member to which a pair of first main body rubbers are separately connected. The first end member is a connected portion provided by either one of a vibration generating portion and a vibration receiving portion, and a first mounting protrusion provided on the middle member. It is known that the structure is sandwiched and fixed in the axial direction.

Japanese Unexamined Patent Publication No. 2011-220486

However, in the conventional vibration isolator, when vibration is input, the first end member may collide with the connected portion and the first mounting protrusion to generate an abnormal noise.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a vibration isolator capable of suppressing the generation of abnormal noise when vibration is input.

In order to solve the above problems, the present invention proposes the following means.
The vibration isolator according to the present invention is connected to a tubular outer mounting member connected to either one of a vibration generating portion and a vibration receiving portion, and is connected to the other, and is arranged inside the outer mounting member. A pair of first main body rubbers that connect the inner mounting member, the outer mounting member, and the inner mounting member, and are arranged at intervals in the axial direction along the central axis of the outer mounting member, and a pair. The liquid chamber between the rubbers of the first main body is divided into a first liquid chamber and a second liquid chamber in the axial direction, and a restricted passage for communicating the first liquid chamber and the second liquid chamber is formed. The outer mounting member includes a partition member, and the outer mounting member includes a first end member and a second end member to which a pair of the first main body rubbers are separately connected, and a middle member to which the partition member is connected. The middle member is formed in a tubular shape extending in the axial direction, and the first end member and the second end member are separately fitted in both ends of the middle member in the axial direction. The outer peripheral surface of the middle member is provided with a first mounting protrusion protruding outward in the radial direction, and the second end member is provided with a second mounting protrusion protruding outward in the radial direction. A connected portion provided by either one of the vibration generating portion and the vibration receiving portion is arranged on one of the end faces of both end faces in the axial direction of the first mounting protrusion, and the other end face is provided. The second mounting protrusion is arranged therein, and the first mounting protrusion and the second mounting protrusion are integrally fixed to the first mounting protrusion and the second mounting protrusion, and the second mounting protrusion is integrally fixed. Insertion holes through which fixing bolts for connecting the first mounting protrusion to the connected portion are formed separately, and the first end member is tightened into the middle member and the first mounting protrusion. 1 The crimping portions are formed separately at intervals in the circumferential direction.

According to the present invention, the connected portion is arranged on one end face of both end faces in the axial direction of the first mounting protrusion, and the second mounting protrusion is arranged on the other end face. Since the first end member is not sandwiched in the axial direction by the connected portion and the first mounting protrusion, it is possible to reduce the number of members sandwiched in the axial direction, and when vibration is input, the member is sandwiched in the axial direction. It is possible to suppress the generation of abnormal noise.
Since a plurality of first crimping portions for tightening the first end member are formed not only on the middle member but also on the first mounting protrusion, the first crimping portion is the total length in the circumferential direction of the first end member. It is possible to tighten the first end member with less bias, and the first end member can be firmly fixed to the middle member by using the fixing bolt without connecting to the one end surface of the first mounting protrusion. it can.

A plurality of the first crimping portions are formed on the middle member at intervals in the circumferential direction, and a plurality of second crimping portions for tightening the second end member are formed on the middle member at intervals in the circumferential direction. In the middle member, the distance between the first crimping portions that are adjacent to each other in the circumferential direction may be wider than the distance between the second crimping portions that are adjacent to each other in the circumferential direction.

In this case, since a plurality of first crimping portions are formed on the middle member at intervals in the circumferential direction, the first end member can be reliably and firmly fixed to the middle member.
In the middle member, the distance between the first crimping portions adjacent to each other in the circumferential direction is wider than the distance between the second crimping portions adjacent to each other in the circumferential direction. It becomes possible to apply a tightening force to the one-end member over a wide range in the circumferential direction, and the first-end member can be reliably and firmly fixed to the middle member.

Of the both end faces in the axial direction of the first end member, one end surface facing the opposite side of the liquid chamber side along the axial direction is projected in the axial direction and extends in the circumferential direction to the connected portion. Protruding ribs to be fitted may be formed in the formed mounting holes.

In this case, since the protruding ribs fitted in the mounting holes formed in the connected portion are formed on the one end surface of the first end member, the relative between the first end member and the connected portion is formed. It is possible to suppress such a misalignment, and it is possible to prevent the first end member and the connected portion from colliding with each other and generating an abnormal noise when vibration is input.

Of both ends in the axial direction of the first mounting protrusion, one end on the side where the first end member is located with respect to the second end member along the axial direction is attached to the middle member. On the other hand, of the both ends of the first end member in the axial direction, the one end on the opposite side of the liquid chamber side along the axial direction is located so as to project outward in the axial direction from the middle member. Protruding outward in the axial direction and radially adjacent to the one end of the first mounting protrusion, one of the plurality of first crimping portions is the one end of the first mounting protrusion. The one end portion of the first end member may be tightened.

In this case, since one of the plurality of first crimping portions is formed at one end of the first mounting protrusion, which is located so as to project outward in the axial direction with respect to the middle member, the first mounting is performed. The first crimping portion can be easily formed on the protrusion.
Since one of the plurality of first crimping portions is formed at the one end portion of the first mounting protrusion and is located above the other first crimping portions formed on the middle member. , The first end member and the middle member can be reliably suppressed from being displaced relative to each other so that their central axes are tilted with each other, and the first end member can be securely and firmly fixed to the middle member. it can.

According to the present invention, it is possible to suppress the generation of abnormal noise when vibration is input.

It is a top view of the vibration isolation device which concerns on one Embodiment of this invention. FIG. 1 is a cross-sectional view taken along the line II-II of FIG. FIG. 3 is a view taken along the line III of FIG.

Hereinafter, the vibration isolator 1 according to the embodiment of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the vibration isolator 1 has a tubular outer mounting member 11 connected to one of a vibration generating portion and a vibration receiving portion, and an outer mounting member 11 connected to the other. A pair of inner mounting members 12 arranged inside the member 11, connecting the outer mounting member 11 and the inner mounting member 12, and arranged at intervals in the axial direction along the central axis O of the outer mounting member 11. The partition member 15 for axially partitioning the liquid chamber 14 between the first main body rubbers 13a and 13b and the pair of first main body rubbers 13a and 13b, and the outer mounting member 11 and the inner mounting member 12 are connected to each other. A second main body rubber 30 arranged on the outside of the liquid chamber 14 is provided.

Hereinafter, in a plan view from the axial direction, the direction intersecting the central axis O is referred to as the radial direction, and the direction orbiting around the central axis O is referred to as the circumferential direction.
For example, ethylene glycol, water, silicone oil, etc. are sealed in the liquid chamber 14. This anti-vibration device 1 is applied to, for example, a cabin mount or the like, and is used in a state where the axial direction is directed in the vertical direction.

The outer mounting member 11 includes a first end member 17 and a second end member 18 to which a pair of first main body rubbers 13a and 13b are separately connected, an inner member 16 to which a partition member 15 is connected, and a second main body. An outer plate member 19 to which the rubber 30 is connected is provided.

The first end member 17 and the second end member 18 are each formed in an annular shape and are arranged coaxially with the central axis O. The middle member 16 is formed in a tubular shape extending in the axial direction, and is arranged coaxially with the central axis O. The first end member 17 and the second end member 18 are separately fitted in both ends in the axial direction of the middle member 16.
Hereinafter, in the axial direction, the side where the first end member 17 is located with respect to the second end member 18 is referred to as the upper side, and the side where the second end member 18 is located with respect to the first end member 17 is referred to as the upper side. It is called the lower side.

The upper end portion (one end portion) of the first end member 17 is positioned so as to project upward with respect to the middle member 16 over the entire length in the circumferential direction. The upper end portion of the first end member 17 may be positioned so as to project upward with respect to the middle member 16 only in a portion that is radially adjacent to the first mounting protrusion 24, which will be described later.
A first flange portion 17a is provided at the upper end portion of the first end member 17 so as to project outward in the radial direction and cover the upper end opening edge 16a of the middle member 16. The upper surface of the first flange portion 17a is flush with the upper end surface (one end surface) of the first end member 17 facing upward (opposite side of the liquid chamber 14 side along the axial direction) among both end surfaces in the axial direction. ing.
It is not necessary to provide the first flange portion 17a on the first end member 17. The first end member 17 may be positioned in the middle member 16 over the entire length in the axial direction.

A protruding rib 17d that projects upward and extends in the circumferential direction is formed on the upper end surface of the first end member 17. The protruding rib 17d is formed on the inner peripheral edge portion on the upper end surface of the first end member 17. The protruding rib 17d extends continuously over the entire length in the circumferential direction. The protruding rib 17d is fitted in the mounting hole 35a formed in the connected portion 35, which will be described later. The protruding rib 17d does not have to be formed on the first end member 17.

The lower end portion of the second end member 18 is positioned so as to project downward with respect to the middle member 16 over the entire length in the circumferential direction. A second flange portion 18a is provided at the lower end portion of the second end member 18 so as to project outward in the radial direction and cover the lower end opening edge 16b of the middle member 16. The lower surface of the second flange portion 18a is flush with the lower end surface of the second end member 18.
The second end member 18 does not have to be provided with the second flange portion 18a. The second end member 18 may be positioned in the middle member 16 over the entire length in the axial direction.

A first mounting protrusion 24 is provided on the outer peripheral surface of the middle member 16 so as to project outward in the radial direction. The second end member 18 is provided with a second mounting protrusion 25 that protrudes outward in the radial direction. The positions of the first mounting protrusion 24 and the second mounting protrusion 25 in the circumferential direction are the same as each other. The first mounting protrusion 24 and the second mounting protrusion 25 are provided on both sides of the central axis O in the radial direction, respectively.

The first mounting protrusion 24 is provided over the entire length in the axial direction on the outer peripheral surface of the middle member 16. The lower end surface of the first mounting protrusion 24 is flush with the lower end opening edge 16b of the middle member 16. The upper end portion (one end portion) of the first mounting protrusion 24 is positioned so as to project upward with respect to the middle member 16. The upper end portion of the first mounting protrusion 24 is radially adjacent to the upper end portion of the first end member 17. The upper end surface of the first mounting protrusion 24 may be flush with the upper end opening edge 16a of the middle member 16. The first flange portion 17a is not arranged on the upper end surface of the first mounting protrusion 24, but the connected portion 35 provided by either the vibration generating portion or the vibration receiving portion is arranged. Of the surface of the upper end portion of the first mounting protrusion 24, the inner surface 24a facing inward in the radial direction extends in the axial direction and extends along a straight line circumscribing the inner peripheral surface of the middle member 16 when viewed from the axial direction. It is a flat surface. The outer peripheral surfaces of the first flange portions 17a are in contact with or close to each inner surface 24a at the upper end portions of the pair of first mounting protrusions 24 in the radial direction.

The first flange portion 17a is formed with a chamfered portion 17b extending along the inner surface 24a of the upper end portion of the first mounting protrusion 24 when viewed from the axial direction. The chamfered portions 17b are provided on both sides of the central axis O in the radial direction. A pair of chamfered portions 17b are radially sandwiched by each inner surface 24a at the upper end portion of the pair of first mounting protrusions 24. The upper surface of the first flange portion 17a and the upper end surface of the first end member 17 are located at positions in the axial direction equivalent to the upper end surface of the first mounting protrusion 24.

The second mounting protrusion 25 is provided on the second flange portion 18a of the second end member 18. The second mounting protrusion 25 projects radially outward from the second flange portion 18a. The second mounting protrusion 25 is formed in a plate shape having a thickness in the axial direction. The plate thicknesses of the second mounting protrusion 25 and the second flange 18a are the same as each other. The upper and lower surfaces of the second mounting protrusion 25 are flush with the upper and lower surfaces of the second flange portion 18a. The upper surface of the second mounting protrusion 25 is arranged on the lower end surface of the first mounting protrusion 24.
The plate thickness of the second mounting protrusion 25 is thicker than the plate thickness of the first flange portion 17a. The plate thickness of the second mounting protrusion 25 may be equal to or less than the plate thickness of the first flange portion 17a.

The first mounting protrusion 24 and the second mounting protrusion 25 are integrally fixed to the first mounting protrusion 24 and the second mounting protrusion 25, and the first mounting protrusion 24 is connected to the connected portion 35. Insertion holes 11a through which the fixing bolts 36 are inserted are formed separately.
Here, the outer plate member 19 is arranged above the first end member 17 and the first mounting protrusion 24. The upper end surfaces of the first end member 17 and the first mounting protrusion 24, the upper surface of the first flange portion 17a, and the lower surface of the outer plate member 19 sandwich the connected portion 35 in the axial direction.

The fixing bolt 36 is inserted into the insertion hole 11a from below, and penetrates the second mounting protrusion 25, the first mounting protrusion 24, and the outer plate member 19 together with the connected portion 35 in the axial direction. There is. The nut 37 is screwed to the portion of the fixing bolt 36 that protrudes upward from the outer plate member 19, so that the second mounting protrusion 25, the first mounting protrusion 24, and the outer plate member 19 are integrally fixed. The first mounting protrusion 24 is connected to the connected portion 35 without interposing the first end member 17. In the illustrated example, the tubular body 25a is fitted into the insertion hole 11a of the second mounting protrusion 25. The fixing bolt 36 is inserted into the insertion hole 11a of the first mounting protrusion 24 through the inside of the tubular body 25a. The fixing bolt 36 is press-fitted into the tubular body 25a.

A plurality of first inclined surfaces 17c extending inward in the radial direction are formed on the outer peripheral surface of the first end member 17 at intervals in the circumferential direction.
The first inclined surface 17c extends from the upper end portion of the outer peripheral surface of the first end member 17 protruding upward with respect to the middle member 16 to the upper portion of the portion fitted in the middle member 16. It is formed. The plurality of first inclined surfaces 17c are formed to have the same shape and the same size as each other. The first inclined surface 17c has a curved shape that is recessed inward in the radial direction in a cross-sectional view orthogonal to the central axis O. The length of the first inclined surface 17c increases in the circumferential direction from the lower side to the upper side when viewed from the outside in the radial direction.
The lower part of the outer peripheral surface of the portion of the first end member 17 that is located below the upper end and is fitted in the middle member 16 extends substantially straight in the axial direction over the entire length in the circumferential direction.

One of the plurality of first inclined surfaces 17c is formed on the outer peripheral surface of the first end member 17 at a portion radially adjacent to the first mounting protrusion 24. In the illustrated example, the first inclined surface 17c is formed on a portion of the outer peripheral surface of the first end member 17 that is radially adjacent to the insertion hole 11a. The first inclined surface 17c is formed on each portion of the outer peripheral surface of the first end member 17 that is radially adjacent to the pair of first mounting protrusions 24, and the pair of first mounting protrusions 17c is formed. A plurality of each intermediate portion separated from the 24 in the circumferential direction is formed at intervals in the circumferential direction. An even number of first inclined surfaces 17c are provided on the first end member 17, and are provided at positions facing the other first inclined surfaces 17c in the radial direction.

In the first flange portion 17a, a first notch portion 17e is formed in each portion connected to the plurality of first inclined surfaces 17c in the axial direction. A plurality of first notch portions 17e are formed in each portion of the first flange portion 17a located between the pair of chamfered portions 17b, and one in each of the pair of chamfered portions 17b. .. The first notch portion 17e penetrates the first flange portion 17a in the axial direction and opens outward in the radial direction. The first notch portion 17e has an arc shape that opens outward in the radial direction when viewed from the axial direction. The inner peripheral surface of the first notched portion 17e is connected to the first inclined surface 17c without a step in the axial direction.

A plurality of second inclined surfaces 18c extending outward in the radial direction are formed on the outer peripheral surface of the second end member 18 at intervals in the circumferential direction.
The second inclined surface 18c extends from the lower end portion of the outer peripheral surface of the second end member 18 protruding downward with respect to the middle member 16 to the lower portion of the portion fitted in the middle member 16. It is formed. The plurality of second inclined surfaces 18c are formed to have the same shape and the same size as each other. The second inclined surface 18c has a curved shape that is recessed inward in the radial direction in a cross-sectional view orthogonal to the central axis O. The length of the second inclined surface 18c increases in the circumferential direction from the upper side to the lower side when viewed from the outside in the radial direction.
The upper portion of the outer peripheral surface of the portion of the second end member 18 located above the lower end portion and fitted in the middle member 16 extends substantially straight in the axial direction over the entire length in the circumferential direction.

The plurality of second inclined surfaces 18c are provided at portions of the second end member 18 that are separated from the pair of second mounting protrusions 25 in the circumferential direction. A plurality of second inclined surfaces 18c are formed on the outer peripheral surfaces of the second end member 18 at intervals in the circumferential direction at each intermediate portion located between the pair of second mounting protrusions 25. .. An even number of second inclined surfaces 18c are provided on the second end member 18, and are provided at positions facing the other second inclined surfaces 18c in the radial direction.

In the second flange portion 18a, a second notch portion 18e is formed in each portion connected to the plurality of second inclined surfaces 18c in the axial direction. A plurality of second notch portions 18e are formed in each portion of the second flange portion 18a located between the pair of second mounting protrusions 25. The second notch portion 18e penetrates the second flange portion 18a in the axial direction and opens outward in the radial direction. The second notch portion 18e has an arc shape that opens outward in the radial direction when viewed from the axial direction. The inner peripheral surface of the second notched portion 18e is connected to the second inclined surface 18c without a step in the axial direction.

The inclination angles of the first inclined surface 17c and the second inclined surface 18c in the central portion in the circumferential direction with respect to the axial direction are equal to each other. The sizes of the first inclined surface 17c and the second inclined surface 18c are the same as each other.
One of the plurality of first inclined surfaces 17c is formed at the central portion in the circumferential direction of the intermediate portion on the outer peripheral surface of the first end member 17, and one of the plurality of second inclined surfaces 18c is formed. The first inclined surface 17c and the second inclined surface 18c are formed in the central portion in the circumferential direction of the intermediate portion on the outer peripheral surface of the second end member 18, and face each other in the axial direction.

In the intermediate portion on the outer peripheral surface of the first end member 17, the distance between the first inclined surfaces 17c adjacent to each other in the circumferential direction in the circumferential direction is between the second inclined surfaces 18c adjacent to each other in the circumferential direction. It is wider than the circumferential interval. The former interval may be less than or equal to the latter interval.
In the illustrated example, a first inclined surface 17c formed on a portion of the outer peripheral surface of the first end member 17 that is radially adjacent to the first mounting protrusion 24 and the first inclined surface 17c in the circumferential direction. The circumferential distance between the other adjacent first inclined surfaces 17c is narrower than the circumferential distance between the second inclined surfaces 18c adjacent to each other in the circumferential direction. The former interval may be greater than or equal to the latter interval.

First crimping portions 28 for tightening the first end member 17 are separately formed on the middle member 16 and the first mounting protrusion 24 at intervals in the circumferential direction.
The first crimping portion 28 is separately formed at each upper end portion of the middle member 16 and the first mounting protrusion 24. Of the plurality of first crimping portions 28, in the first crimping portion 28 formed on the middle member 16, the outer peripheral surface and the inner peripheral surface at the upper end portion of the middle member 16 are radially inside as they go upward. In the first crimping portion 28 formed by extending toward, and formed at the upper end portion of the first mounting protrusion 24, the inner surface 24a of the upper end portion of the first mounting protrusion 24 and the inner circumference of the insertion hole 11a. Of the surfaces, the portion located at the upper end of the first mounting protrusion 24 and located at the inner end in the radial direction and facing the outer side in the radial direction, and the portion facing the outer side in the radial direction toward the inner side in the radial direction as it goes upward. It is formed by extending.

The plurality of first crimping portions 28 are formed to have the same shape and the same size. The first crimping portion 28 exhibits a curved shape that is recessed inward in the radial direction in a cross-sectional view orthogonal to the central axis O. As shown in FIG. 3, the length of the first crimping portion 28 increases in the circumferential direction from the lower side to the upper side when viewed from the outside in the radial direction.

A plurality of first crimping portions 28 are formed on the middle member 16 at intervals in the circumferential direction, and one is formed on each of the pair of first mounting protrusions 24. The number of first crimping portions 28 is the same as the number of first inclined surfaces 17c. The plurality of first crimping portions 28 are provided at positions in the same circumferential direction as the first inclined surface 17c. The plurality of first crimping portions 28 are separately fitted to the plurality of first inclined surfaces 17c. One first crimping portion 28 may be formed on the middle member 16.

Of the plurality of first crimping portions 28, the upper portion of the first crimping portion 28 formed on the first mounting protrusion 24 is located above the first crimping portion 28 formed on the middle member 16. There is. Of the plurality of first crimping portions 28, the first crimping portion 28 formed on the middle member 16 is located below the first flange portion 17a, and the first crimping portion 28 formed on the first mounting protrusion 24. The upper portion of the tightening portion 28 is fitted to the first notch portion 17e of the first flange portion 17a. The outer surface and the upper end opening edge of the first crimping portion 28 are opened upward through the first notch portion 17e of the first flange portion 17a.
The first crimping portion 28 formed on the middle member 16 is a first crimping portion formed on the first mounting protrusion 24 by tightening a portion of the first end member 17 located below the upper end portion. Reference numeral 28 denotes an upper portion of the first end member 17, including an upper end portion and a portion located below the upper end portion.

A plurality of second crimping portions 29 for tightening the second end member 18 are formed on the middle member 16 at intervals in the circumferential direction. It is not necessary to form the second crimping portion 29 on the middle member 16.
The plurality of second crimping portions 29 are formed at the lower end portion of the middle member 16. The second crimping portion 29 is formed by extending the outer peripheral surface and the inner peripheral surface at the lower end portion of the middle member 16 inward in the radial direction in the downward direction. The plurality of second crimping portions 29 are formed in portions of the middle member 16 that are separated from the pair of first mounting protrusions 24 in the circumferential direction.

The plurality of second crimping portions 29 are formed to have the same shape and the same size. The second crimping portion 29 exhibits a curved shape that is recessed inward in the radial direction in a cross-sectional view orthogonal to the central axis O. The length of the second crimping portion 29 increases in the circumferential direction from the upper side to the lower side when viewed from the outside in the radial direction.
The number of the second crimping portions 29 is the same as the number of the second inclined surfaces 18c. The plurality of second crimping portions 29 are provided at positions in the same circumferential direction as the second inclined surface 18c. The plurality of second crimping portions 29 are separately fitted to the plurality of second inclined surfaces 18c. The second crimping portion 29 is located above the second flange portion 18a. The outer surface and the lower end opening edge of the second crimping portion 29 are opened downward through the second notch portion 18e of the second flange portion 18a.

The inclination angles of the first crimping portion 28 and the second crimping portion 29 in the central portion in the circumferential direction with respect to the axial direction are equal to each other. The sizes of the first crimping portion 28 and the second crimping portion 29 are the same as each other.
One of the plurality of first crimping portions 28 and one of the plurality of second crimping portions 29 are formed at the central portion in the circumferential direction of the intermediate portion of the middle member 16, respectively. The first crimping portion 28 and the second crimping portion 29 face each other in the axial direction.

In each intermediate portion of the middle member 16 located between the pair of first mounting protrusions 24, the circumferential distance between the first crimping portions 28 adjacent to each other in the circumferential direction is in the circumferential direction. It is wider than the circumferential distance between the second crimping portions 29 adjacent to each other. The former interval may be less than or equal to the latter interval.
In the illustrated example, the first crimping portion 28 formed on the first mounting protrusion 24 and the first crimping portion 28 formed on the middle member 16 adjacent to the first crimping portion 28 in the circumferential direction. The circumferential distance between the 28 and 28 is narrower than the circumferential distance between the second crimping portions 29 that are adjacent to each other in the circumferential direction. The former interval may be greater than or equal to the latter interval.

The outer plate member 19 is formed in an annular shape and is arranged coaxially with the central axis O. The outer plate member 19 includes an inner portion 19a embedded in the second main body rubber 30 and an outer portion 19b protruding outward in the radial direction from the second main body rubber 30.

The inner portion 19a includes an annular top wall 19c whose front and back surfaces face in the axial direction, an inner cylinder portion 19d extending downward from the radial inner end portion of the annular top wall 19c, and a radial outer portion of the annular top wall 19c. An outer cylinder portion 19e extending downward from the end portion and a receiving plate portion 19f extending radially inward from the lower end portion of the inner cylinder portion 19d are provided.

The outer portion 19b extends radially outward from the lower end of the outer cylinder portion 19e and is formed in an annular shape. The outer portion 19b is formed in a plate shape with the front and back surfaces facing in the axial direction. The lower surface of the outer portion 19b is connected to the connected portion 35. The lower surface of the outer portion 19b is axially opposed to the upper end surfaces of the first mounting protrusion 24 and the first end member 17 and the upper surface of the first flange portion 17a via the connected portion 35.

The receiving plate portion 19f is axially opposed to the upper first main body rubber 13a located above the pair of first main body rubbers 13a and 13b. The connecting portion between the inner cylinder portion 19d and the receiving plate portion 19f is curved so as to project outward in the radial direction. The receiving plate portion 19f, the connecting portion, and the inner cylinder portion 19d are smoothly connected without a step, a corner portion, or the like. The protruding length of the receiving plate portion 19f from the inner peripheral surface of the inner cylinder portion 19d toward the inside in the radial direction is smaller than the radial width of the annular top wall 19c. The lower surface of the receiving plate portion 19f is located at an axial position equivalent to the lower surface of the outer portion 19b.

The second main body rubber 30 is arranged above the pair of first main body rubbers 13a and 13b. The second main body rubber 30 is axially adjacent to the upper first main body rubber 13a connected to the first end member 17 of the pair of first main body rubbers 13a and 13b. The second main body rubber 30 is formed in a tubular shape and is arranged coaxially with the central axis O. The inside of the second main body rubber 30 is a mounting hole 30a that penetrates the second main body rubber 30 in the axial direction, and the inner mounting member 12 is press-fitted into the mounting hole 30a.

The inner mounting member 12 is arranged inside the outer mounting member 11 in the radial direction. The inner mounting member 12 has a tubular shape and is arranged coaxially with the central axis O. The outer peripheral surface of the inner mounting member 12 is substantially parallel to the inner peripheral surface of the inner cylinder portion 19d of the outer plate member 19. The outer peripheral surface of the inner mounting member 12 is separated inward from the radial inner end portion of the receiving plate portion 19f. Both ends of the inner mounting member 12 in the axial direction are located outside the outer mounting member 11 in the axial direction. The upper end of the inner mounting member 12 is located above the second main body rubber 30.

A bounce stopper 41 is disposed at the upper end of the inner mounting member 12, and a rebound stopper 42 is disposed at the lower end of the inner mounting member 12. The bounce stopper 41 and the rebound stopper 42 are each formed in an annular shape and are arranged coaxially with the central axis O. The bounce stopper 41 and the rebound stopper 42 are each formed in a plate shape with the front and back surfaces facing in the axial direction.

The bounce stopper 41 faces the inner portion 19a of the outer plate member 19 in the axial direction, and sandwiches at least the inner cylinder portion 19d and the receiving plate portion 19f in the axial direction between the upper first main body rubber 13a. In the bound stopper 41, the lower surface of the outer plate member 19 facing the outer plate member 19 in the axial direction is substantially parallel to the upper surface of the annular top wall 19c of the outer plate member 19. A bound stopper rubber 41a is arranged on the lower surface of the bound stopper 41. The bound stopper rubber 41a is adhered to the bound stopper 41. The bounce stopper rubber 41a extends continuously over the entire length in the circumferential direction. The bounce stopper rubber 41a is integrally formed with the second main body rubber 30. Of the bounce stopper rubber 41a, the inner portion in the radial direction is connected to the inner peripheral portion of the second main body rubber 30 in the axial direction, and the lower surface of the outer portion in the radial direction is the upper surface of the outer peripheral portion of the second main body rubber 30. , Facing each other with a gap in the axial direction. The lower surface of the radial outer portion of the bound stopper rubber 41a is axially opposed to the annular top wall 19c of the outer plate member 19 via the outer peripheral portion of the second main body rubber 30.

The rebound stopper 42 faces the lower end surface of the second end member 18 in the axial direction. On the lower end surface of the second end member 18, a rebound stopper rubber 42a that projects on the opposite side of the liquid chamber 14 side along the axial direction, that is, downward, and faces the upper surface of the rebound stopper 42 in the axial direction is arranged. .. The rebound stopper rubber 42a is arranged on the inner portion in the radial direction on the lower end surface of the second end member 18, and faces the outer peripheral portion of the rebound stopper 42 in the axial direction. The rebound stopper rubber 42a extends continuously over the entire length in the circumferential direction. The rebound stopper rubber 42a is formed integrally with the lower first main body rubber 13b located on the lower side of the pair of first main body rubbers 13a and 13b.

The upper first main body rubber 13a is formed in an annular shape and is arranged coaxially with the central axis O. Of the upper first main body rubber 13a, the inner end portion in the radial direction is adhered to the outer peripheral surface of the inner mounting member 12, and the outer end portion in the radial direction is adhered to the first end member 17.
The lower first main body rubber 13b is formed in an annular shape and is arranged coaxially with the central axis O. Of the lower first main body rubber 13b, the inner end portion in the radial direction is pressure-welded to the outer peripheral surface of the inner mounting member 12 in a non-adhesive state, and the outer end portion in the radial direction is adhered to the second end member 18. There is.

The outer surface of the upper first main body rubber 13a facing upward (opposite to the liquid chamber 14 side along the axial direction) and facing the second main body rubber 30 in the axial direction has a diameter in a vertical cross-sectional view along the axial direction. It is tilted in both the directional and axial directions. In the illustrated example, the outer surface of the upper first main body rubber 13a extends downward from the inside to the outside in the radial direction. The outer surface of the upper first main body rubber 13a is axially separated from the second main body rubber 30 and the outer plate member 19 from the inner side to the outer side in the radial direction.

The partition member 15 has an annular shape and is arranged in the liquid chamber 14. The outer peripheral surface of the partition member 15 is connected to the inner peripheral surface of the outer mounting member 11, and the inner peripheral surface of the partition member 15 is connected to the outer peripheral surface of the inner mounting member 12. The partition member 15 partitions the liquid chamber 14 into a first liquid chamber 26 and a second liquid chamber 27 in the axial direction.
The partition member 15 is formed with a limiting passage 21 that communicates the first liquid chamber 26 and the second liquid chamber 27. The restriction passage 21 extends beyond 360 ° around the central axis O.

The partition member 15 has an annular elastic portion 32 in which the outer end portion in the radial direction is connected to the outer mounting member 11, and the inner mounting member 12 is fitted inside, and the outer end portion in the radial direction is the elastic portion 32. It includes a connected annular rigid body portion 33. The elastic portion 32 and the rigid body portion 33 are respectively arranged coaxially with the central axis O. The elastic portion 32 is made of, for example, a rubber material having a hardness lower than that of the rigid body portion 33. The radial inner end of the elastic portion 32 and the radial outer end of the rigid body 33 are connected to each other. The elastic portion 32 is adhered to the inner peripheral surface of the middle member 16 of the outer mounting member 11 and the outer end portion in the radial direction of the rigid body portion 33. A step portion 12a formed on the outer peripheral surface of the inner mounting member 12 is in contact with the upper surface of the radial inner end portion of the rigid body portion 33.

The rigid body portion 33 is arranged on the lower surface of the rigid body portion main body 34 having an orifice groove 33a for communicating the first liquid chamber 26 and the second liquid chamber 27 on the lower surface thereof, and in the orifice groove 33a. A lid 22 that defines the restriction passage 21 by closing the lower opening is provided.
The rigid body main body 34 and the lid 22 are respectively arranged coaxially with the central axis O. The rigid body main body 34 has a larger axial size and a larger radial size than the lid 22.

A press-fitting hole 34a into which the lid 22 is press-fitted is formed on the lower surface of the rigid body main body 34. The depth of the press-fitting hole 34a is larger than the axial size of the lid 22. An orifice groove 33a is opened on the bottom surface of the press-fit hole 34a. On the lower surface of the rigid body main body 34, the inner peripheral edge portion located inside the press-fitting hole 34a in the radial direction is located above the outer peripheral edge portion located radially outside the press-fitting hole 34a. The positions of the inner peripheral edges of the lower surface of the lid 22 and the lower surface of the rigid body 34 in the axial direction are the same as each other.
A first opening 34b that opens at one end in the circumferential direction of the orifice groove 33a is formed on the upper surface of the rigid body main body 34. The lid 22 is formed with a second opening 22a that opens at the other end of the orifice groove 33a in the circumferential direction.

Here, in the lower first main body rubber 13b, a support metal fitting 23 that sandwiches the lid body 22 with the bottom surface of the press-fitting hole 34a is embedded. The support metal fitting 23 is formed in a tubular shape and is arranged coaxially with the central axis O. The support metal fitting 23 is embedded in the inner peripheral edge of the lower first main body rubber 13b. The upper end opening edge of the support metal fitting 23 is located flush with or slightly below the upper surface of the inner peripheral edge of the lower first main body rubber 13b. The upper end opening edge of the support metal fitting 23 supports the inner peripheral edge portion on the lower surface of the lid body 22. The upper end opening edge of the support metal fitting 23 may support the outer peripheral edge portion on the lower surface of the lid body 22 or the intermediate portion in the radial direction.

The upper end portion of the support metal fitting 23 has a larger inner diameter and outer diameter than a portion located below the upper end portion, and is located outside in the radial direction. A part of the lower first main body rubber 13b is filled inside the upper end portion of the support metal fitting 23. Of the lower first main body rubber 13b, a portion (hereinafter referred to as an annular seal portion) 13c located inside the upper end portion of the support metal fitting 23 extends continuously over the entire length in the circumferential direction. The annular seal portion 13c is pressure-welded over the lower surface of the lid 22 and the lower surface of the rigid body main body 34. The annular seal portion 13c is in pressure contact with the inner peripheral edge portion of the lower surface of each of the lid body 22 and the rigid body portion main body 34.

In the above configuration, the second main body rubber 30 mainly supports the static load applied to the vibration isolator 1 and suppresses the relative displacement of the outer mounting member 11 and the inner mounting member 12 in the axial direction, while suppressing the relative displacement in the axial direction. When the vibration of the first body is input, the rubbers 13a and 13b of the first main body are elastically deformed, and the liquid in the liquid chamber 14 is circulated between the first liquid chamber 26 and the second liquid chamber 27 through the limiting passage 21 to vibrate. Can be attenuated and absorbed. That is, the anti-vibration device 1 has a configuration in which the anti-vibration rubber and the liquid-sealed anti-vibration device are directly connected in the axial direction.

As described above, according to the vibration isolator 1 according to the present embodiment, the connected portion 35 is arranged on one of the end faces in the axial direction of the first mounting protrusion 24, and any of the above. A second mounting protrusion 25 is arranged on the other end surface, and the first end member 17 is not axially sandwiched between the connected portion 35 and the first mounting protrusion 24, so that the first end member 17 is axially sandwiched. It is possible to reduce the number of members that are sandwiched, and it is possible to suppress the generation of abnormal noise when vibration is input.
Since a plurality of first crimping portions 28 for tightening the first end member 17 are formed not only on the middle member 16 but also on the first mounting protrusion 24, the first crimping portion 28 can be used as the first end member. It becomes possible to tighten the first end member 17 with less bias over the entire length in the circumferential direction of 17, and the first end member 17 is firmly fixed to the middle member 16 without being connected to the first mounting protrusion 24 by using a fixing bolt 36. can do.

Since a plurality of first crimping portions 28 are formed on the middle member 16 at intervals in the circumferential direction, the first end member 17 can be reliably and firmly fixed to the middle member 16.
In the middle member 16, the distance between the first crimping portions 28 adjacent to each other in the circumferential direction is wider than the distance between the second crimping portions 29 adjacent to each other in the circumferential direction. It becomes possible to apply a tightening force from the portion 28 to the first end member 17 over a wide range in the circumferential direction, and the first end member 17 can be securely and firmly fixed to the middle member 16.

Since the protruding rib 17d fitted in the mounting hole 35a formed in the connected portion 35 is formed on the upper end surface of the first end member 17, the relative between the first end member 17 and the connected portion 35 is formed. It is possible to suppress such a misalignment, and it is possible to prevent the first end member 17 and the connected portion 35 from colliding with each other and generating an abnormal noise when vibration is input.

Since one of the plurality of first crimping portions 28 is formed at the upper end portion of the first mounting protrusion 24, which is located so as to project outward in the axial direction with respect to the middle member 16, the first mounting protrusion 28 is formed. The first crimping portion 28 can be easily formed on the portion 24.
One of the plurality of first crimping portions 28 is formed at the upper end portion of the first mounting protrusion 24 and is located above the other first crimping portions 28 formed in the middle member 16. Therefore, it is possible to reliably suppress the relative displacement of the first end member 17 and the middle member 16 so that their central axes are tilted with each other, and the first end member 17 is surely attached to the middle member 16. Can be firmly fixed to.

The technical scope of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

For example, in the above embodiment, the lower first main body rubber 13b is pressed against the outer peripheral surface of the inner mounting member 12 in a non-adhesive state, and the upper first main body rubber 13a is adhered to the outer peripheral surface of the inner mounting member 12. Although the configuration is shown, the upper first main body rubber 13a is pressed against the outer peripheral surface of the inner mounting member 12 in a non-adhesive state, and the lower first main body rubber 13b is adhered to the outer peripheral surface of the inner mounting member 12. May be adopted.
Further, in the above embodiment, the outer surface of the upper first main body rubber 13a extends downward from the inner side to the outer side in the radial direction, but the outer surface of the upper first main body rubber 13a has a diameter. It may extend downward or straight in the radial direction from the outside to the inside in the direction.

Further, in the above embodiment, the support metal fitting 23 is embedded in the lower first main body rubber 13b, but the lid 22 is press-fitted by the lower first main body rubber 13b in which the support metal fitting 23 is not embedded. It may be sandwiched between the bottom surface of the hole 34a and the bottom surface.
Further, in the above embodiment, the lower first main body rubber 13b is pressed against the lower surface of the lid 22 and the lower surface of the rigid body main body 34, but the lower first main body rubber 13b is the lid. Even if a configuration is adopted in which the lower surface of the body 22 and the lower surface of the rigid body main body 34 are not in contact with each other, or the lower surface of the lid 22 and the lower surface of the rigid body main body 34 are in contact with each other. Good.

Further, in the above embodiment, the second main body rubber 30 and the outer plate member 19 are arranged above the pair of the first main body rubbers 13a and 13b and the first end member 17, but the first A configuration in which the two main body rubbers 30 and the outer plate member 19 are arranged below the pair of the first main body rubbers 13a and 13b and the second end member 18 may be adopted.
Further, the second main body rubber 30 may be adhered to the outer peripheral surface of the inner mounting member 12.
The present invention can also be applied to a vibration isolator that does not have the second main body rubber 30 and the outer plate member 19.

Further, as the inner portion 19a of the outer plate member 19, a configuration may be adopted in which at least one of the annular top wall 19c, the inner cylinder portion 19d, the outer cylinder portion 19e, and the receiving plate portion 19f is not provided.
The present invention can also be applied to a vibration isolator that does not have a bound stopper 41, a bound stopper rubber 41a, a rebound stopper 42, and a rebound stopper rubber 42a.
For example, in the above embodiment, the partition member 15 has been shown to include the elastic portion 32 and the rigid body portion 33, but the present invention is not limited to this aspect, and for example, a configuration including only the rigid body portion may be adopted. ..
Further, the restriction passage 21 may extend less than 360 ° around the central axis O.
Further, the orifice groove 33a may be formed on the outer peripheral surface of the rigid body main body 34.

The anti-vibration device 1 is not limited to the cabin mount of the vehicle, and can be applied to other than the cabin mount. For example, it can be applied to an engine mount or bush for a vehicle, a mount of a generator mounted on a construction machine, or a mount of a machine installed in a factory or the like.

In addition, it is possible to replace the components in the embodiment with well-known components as appropriate without departing from the spirit of the present invention, and the above-mentioned modifications may be appropriately combined.

1 Anti-vibration device 11 Outer mounting member 11a Insertion hole 12 Inner mounting member 13a, 13b 1st body rubber 14 Liquid chamber 15 Partition member 16 Middle member 17 1st end member 17d Protruding rib 18 2nd end member 21 Restriction passage 24 1st Mounting protrusion 25 2nd mounting protrusion 26 1st liquid chamber 27 2nd liquid chamber 28 1st crimping part 29 2nd crimping part 35 Connected part 35a Mounting hole 36 Fixing bolt O Center axis

Claims (4)

A tubular outer mounting member connected to either one of the vibration generating portion and the vibration receiving portion, and an inner mounting member connected to the other and arranged inside the outer mounting member.
A pair of first main body rubbers that connect the outer mounting member and the inner mounting member and are arranged at intervals in the axial direction along the central axis of the outer mounting member.
The liquid chamber between the pair of rubbers of the first main body is divided into a first liquid chamber and a second liquid chamber in the axial direction, and a restricted passage for communicating the first liquid chamber and the second liquid chamber is formed. With a partition member,
The outer mounting member includes a first end member to which a pair of the first main body rubbers are separately connected, a second end member, and a middle member to which the partition member is connected.
The middle member is formed in a tubular shape extending in the axial direction.
The first end member and the second end member are separately fitted into both ends of the middle member in the axial direction.
A first mounting protrusion that protrudes outward in the radial direction is provided on the outer peripheral surface of the middle member.
The second end member is provided with a second mounting protrusion that protrudes outward in the radial direction.
A connected portion provided by either one of the vibration generating portion and the vibration receiving portion is arranged on one of the end faces of both end faces in the axial direction of the first mounting protrusion, and the other end face is provided. The second mounting protrusion is arranged in the
The first mounting protrusion and the second mounting protrusion are integrally fixed to the first mounting protrusion and the second mounting protrusion, and the first mounting protrusion is connected to the connected portion. Insertion holes for inserting the connecting fixing bolts are formed separately.
A vibration isolator in which first crimping portions for tightening the first end member are separately formed at the middle member and the first mounting protrusion at intervals in the circumferential direction. A plurality of the first crimping portions are formed on the middle member at intervals in the circumferential direction.
A plurality of second crimping portions for tightening the second end member are formed on the middle member at intervals in the circumferential direction.
The prevention according to claim 1, wherein in the middle member, the distance between the first crimping portions adjacent to each other in the circumferential direction is wider than the distance between the second crimping portions adjacent to each other in the circumferential direction. Shaking device. Of both end faces in the axial direction of the first end member, one end surface that faces the opposite side of the liquid chamber side along the axial direction, protrudes in the axial direction and extends in the circumferential direction, and extends to the connected portion. The anti-vibration device according to claim 1 or 2, wherein a protruding rib to be fitted is formed in the formed mounting hole. Of both ends in the axial direction of the first mounting protrusion, one end on the side where the first end member is located with respect to the second end member along the axial direction is attached to the middle member. On the other hand, it is located so as to project outward in the axial direction.
Of both ends in the axial direction of the first end member, one end on the opposite side of the liquid chamber side along the axial direction projects outward from the middle member in the axial direction, and the first mounting protrusion. Adjacent to the one end of the portion in the radial direction,
Claims 1 to 3, wherein one of the plurality of first crimping portions is formed at the one end portion of the first mounting protrusion and tightens the one end portion of the first end member. The anti-vibration device according to any one of the following items.

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