JP2011252533A - Vibration control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify a structure and to reduce cost, in a vibration control device.SOLUTION: A rubber elastic body 12 includes a pair of main spring sections 12a and 12b extending from an outer peripheral surface of an inner tube body 10 to both sides of a first axially orthogonal direction to be connected to an inner peripheral surface of an outer tube body 11, and an axially orthogonal direction stopper section 12d projecting to the inside of a second axially orthogonal direction orthogonal to the first axially orthogonal direction from the inner peripheral surface of the outer tube body 11 to regulate relative movement of both of the tube bodies 10 and 11 in a second axially orthogonal direction. This vibration control device further includes a first connection rubber elastic body 14 provided between an axial direction stopper rubber elastic body 13 and the one main spring section 12b to connect both of them with each other, and a second connection rubber elastic body 15 provided between the axial direction stopper rubber elastic body 13 and the axially orthogonal direction stopper section 12d to connect both of them with each other.

Description

  The present invention includes at least a part of an inner cylinder, an outer cylinder provided around the inner cylinder, an elastic body provided between the two cylinders and connecting the two cylinders to each other. An anti-vibration device provided with an axial stopper elastic body provided so as to be positioned on the axially outer side from the end surface on one axial side of the outer cylindrical body and restricting relative movement of the cylindrical bodies in the axial direction It is about.

  A vibration isolator applied to an automobile engine mount or the like is known as a prior art.

  For example, the vibration isolator of Patent Document 1 includes an inner cylinder, an outer cylinder provided around the inner cylinder, and an elastic body that is provided between the two cylinders and connects the two cylinders to each other. And. The inner cylinder is connected to the power plant on the vibration source side, while the outer cylinder is connected to the body frame on the vibration receiving side.

  The vibration isolator further includes an axial stopper elastic body that restricts relative movement in the axial direction of both cylinders. This axial stopper elastic body is provided on the axially outer surface of the flange extending radially outward from the end portion on one axial side of the outer cylinder. The axial stopper elastic body abuts against a power plant side bracket or the like, so that the relative movement in the axial direction of both cylinders is restricted.

Japanese Patent No. 4290073

  However, in the vibration isolator of Patent Document 1, since the flange is formed on the outer cylinder as described above, there is a problem that the structure is complicated and the cost is increased.

  The present invention has been made in view of such a point, and the object is to provide an inner cylinder, an outer cylinder provided around the inner cylinder, and a space between the two cylinders. And at least a part of the elastic body that connects the two cylinders to each other, and is located on the axially outer side of the end surface on one axial side of the outer cylinder. In the vibration isolator including an axial stopper elastic body that restricts relative movement, the structure is simplified and the cost is reduced.

  The first invention includes at least one of an inner cylinder, an outer cylinder provided around the inner cylinder, an elastic body provided between the two cylinders and connecting the two cylinders to each other. And an axial stopper elastic body that is provided so that the portion is positioned on the outer side in the axial direction with respect to the end surface on one axial side of the outer cylindrical body and restricts the relative movement in the axial direction of the two cylindrical bodies. In the vibration device, the elastic body includes a pair of main spring portions that extend from the outer peripheral surface of the inner cylinder to both sides in the first axial direction and are connected to the inner peripheral surface of the outer cylinder, and the outer cylinder An axial direction stopper portion that protrudes from the inner peripheral surface of the body to the inside of the second axial direction perpendicular to the first axial direction and restricts relative movement of the two cylinders in the second axial direction. A first connecting elastic body provided between the axial stopper elastic body and one main spring portion and connecting the two to each other; and the shaft And is characterized in that it further comprises a second connecting elastic body for connecting together both said user provided between the counter stopper elastic body and the axis perpendicular direction stopper portion.

  According to this, the first connecting elastic body provided between the axial stopper elastic body and the one main spring portion and connecting the two to each other, and between the axial stopper elastic body and the axial direction stopper portion. Since the second connecting elastic body is provided for connecting the two to each other, the first stopper elastic body can securely hold the axial stopper elastic body at the position. This eliminates the need for the flange for installing the axial stopper elastic body on the outer cylinder as in the conventional case, simplifying the structure and reducing the cost.

  According to a second invention, in the first invention, the axial stopper elastic body is configured so that the axial stopper member from the radially outer portion of the portion where the one main spring portion is disposed when viewed from the axial direction. It is provided so that it may extend in the circumferential direction over the range to the part of the radial direction outer side of the part by which this is arrange | positioned.

  According to this, the axial stopper elastic body is a portion radially outside the portion where the axial direct stopper portion is disposed from the portion outside the portion where the main spring portion is disposed when viewed from the axial direction. A first connecting elastic body provided between the axial stopper elastic body and one main spring portion and connecting the two to each other, and a shaft. A second connecting elastic body that is provided between the direction stopper elastic body and the axial direction stopper portion and connects the two to each other can have a simple structure.

  A third invention is characterized in that, in the first or second invention, the first and second connecting elastic bodies are formed integrally with the elastic body and the axial stopper elastic body. is there.

  According to this, since the first and second coupling elastic bodies are formed integrally with the elastic body and the axial stopper elastic body, the axial stopper elastic body is located at the position by the first and second coupling elastic bodies. It can hold | maintain still more reliably.

  According to a fourth invention, in any one of the first to third inventions, the first connecting elastic body is provided between the axial stopper elastic body and a circumferential central portion of the one main spring portion. It is characterized by being.

  By the way, both ends in the circumferential direction of the main spring portion are more susceptible to stress than the central portion in the circumferential direction, and the first coupling elasticity is provided between the circumferential end of one main spring portion and the axial stopper elastic body. When the body is provided, the durability of one main spring portion is deteriorated.

  Here, according to the present invention, the first connecting elastic body is provided between the axial stopper elastic body and the one central spring portion between the central portion in the circumferential direction in which stress is unlikely to occur. It is possible to suppress the deterioration of the durability.

  According to the present invention, the first connecting elastic body that is provided between the axial stopper elastic body and the one main spring portion and connects the two to each other, and the axial stopper elastic body and the axial direct stopper portion Since the second connecting elastic body that is provided between and connects the two to each other is provided, the axial stopper elastic body can be securely held at the position by the first and second connecting elastic bodies, As in the prior art, a flange for installing an axial stopper elastic body is not required on the outer cylinder, and the structure can be simplified and the cost can be reduced.

It is a front view which shows the main body of the engine mount which concerns on embodiment of this invention. It is a side view which shows the main body of an engine mount. It is a perspective view which shows the main body of an engine mount. It is a front view which shows an engine mount.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  In this embodiment, the vibration isolator according to the present invention is applied to an automobile engine mount, and this engine mount is interposed between an automobile power plant and a vehicle body (not shown) to support the load of the power plant. At the same time, the vibration from the power plant is absorbed or attenuated to suppress the vibration transmission to the vehicle body.

  In other words, the engine mount suspends the transmission-side end of a power plant mounted horizontally in the engine room, for example, and is arranged so that the axis of the inner cylinder is generally directed in the front-rear direction of the automobile body. ing.

  As shown in FIGS. 1 to 4, a main body (hereinafter referred to as a “mount main body”) 1 of the engine mount A includes a hollow cylindrical metal inner cylinder 10 and an inner cylinder around the outer periphery of the inner cylinder 10. A hollow cylindrical metal outer cylinder 11 provided coaxially with the cylinder 10 and a rubber elastic body 12 provided between the cylinders 10 and 11 and connecting the cylinders 10 and 11 to each other (in the present invention) (Corresponding to the “elastic body”) and substantially all of the cylinders 10 and 11 are provided so as to be positioned on the axially outer side of the end surface on the one axial side (front side in FIG. 1) of the outer cylindrical body 11. An axial stopper rubber elastic body 13 (corresponding to the “stopper elastic body” of the present invention) that restricts relative movement in the axial direction is provided. A cylindrical body 2 having a mount main body 1 press-fitted and fixed therein is provided with a body frame (not shown) on the vibration receiving side by metal brackets 20 and 21 integrally provided on the outer periphery so as to extend radially outward. The inner cylinder 10 is connected to the power plant on the vibration source side by brackets (not shown) whose axial ends are respectively coupled by bolts or the like. .

  1 to 4 show an unloaded state where the static load of the power plant is not acting. In this state, the center axis of the inner cylinder 10 is offset upward from the center axis of the outer cylinder 11. However, in the 1G state where the static load of the power plant is applied as described above and the static load of the power plant is applied, the rubber elastic body 12 is bent and the inner cylinder body 10 is displaced downward, and the central axis thereof is the outer cylinder body 11. It almost coincides with the central axis.

  The inner cylinder 10 has an axial length longer than that of the outer cylinder 11, and both axial ends of the inner cylinder 10 protrude from the outer cylinder 11. The outer peripheral shape of the inner cylinder 10 is a non-circular shape other than a circular shape when viewed from the axial direction. Specifically, the outer periphery of the inner cylindrical body 10 is composed of a linear plane portion that constitutes the upper and lower portions thereof, and a curved curved surface portion that constitutes the left and right portions thereof.

  The rubber elastic body 12 extends from the outer peripheral surface of the inner cylindrical body 10 to both sides in the first axial direction (vehicle width direction (horizontal direction) in the present embodiment) and is connected to the inner peripheral surface of the outer cylindrical body 11. A pair of main spring portions 12a and 12b and a second from a portion facing each other in the second axis perpendicular direction (vertical direction in the present embodiment) orthogonal to the first axis perpendicular direction on the inner peripheral surface of the outer cylindrical body 11 respectively. A pair of axial stoppers 12c and 12d that project inward in the axial direction and restrict relative movement of the cylindrical bodies 10 and 11 in the second axial direction, and a first covering the outer peripheral surface of the inner cylindrical body 10 It has the coating | coated part 12e and the 2nd coating | coated part 12f which covers the internal peripheral surface of the outer cylinder 11. FIG. The rubber elastic body 12 is formed with through-holes 12g and 12h penetrating in the axial direction in the vicinity of the upper side and the lower side of the inner cylindrical body 10, respectively.

  The main spring portions 12a and 12b extend in a C shape from the inner cylinder body 10 in detail, and elastically support the inner cylinder body 10 with respect to the outer cylinder body 11, and have predetermined vibration-proof characteristics. The shape and size are set so that Both end surfaces in the axial direction of the main spring portions 12 a and 12 b are inclined inward in the axial direction from the inner side to the outer side in the radial direction, and the outer end portions in the radial direction are more axial than both end surfaces in the axial direction of the outer cylinder 11. It is located inside the direction.

  The axial direction stopper portions 12 c and 12 d are provided over substantially the entire axial direction of the outer cylinder 11. The upper axial direction stopper portion 12c is disposed so as to face the upper through hole 12g, and the lower axial direction stopper portion 12d is disposed so as to face the lower through hole 12h. The shape of the lower axial direction stopper portion 12d is a substantially trapezoidal shape when viewed from the axial direction. The axially straight stopper portions 12c and 12d abut against the inner cylinder 10 so that the relative movement in the second axis perpendicular direction of both the cylinders 10 and 11 is restricted.

  The axial stopper rubber elastic body 13 has one main spring portion 12b (on the right side in FIG. 1) as viewed from the axial direction so as to be along the end surface of the outer cylinder body 11 on one axial side (front side in FIG. 1). Extending in the circumferential direction over the range from the radially outer portion of the portion where the main spring portion 12b) is disposed to the radially outer portion of the portion where the lower axial stopper portion 12d is disposed. Is provided. Specifically, this range is the end of the main spring portion 12b side in the circumferential direction of the axially straight stopper portion 12d on the lower side from the radially outer vicinity of the central portion in the circumferential direction of one main spring portion 12b (FIG. 1). Is the range up to the radially outer side of the right end portion. There are two possible ranges for the above range, but in this embodiment it is the shorter one. The shape of the axially outer end face of the axial stopper rubber elastic body 13 is a wave shape. The axial stopper rubber elastic body 13 is connected to the second covering portion 12f.

  Although not shown, a stopper rubber elastic body that restricts the relative movement in the axial direction of both cylinders 10 and 11 is provided on the other axial end of the inner cylinder 10 (the end on the back side in FIG. 1). Fitted.

  The tubular fitting 2 is formed by bending a hollow cylindrical tubular portion (not shown) and an end portion on one axial side (front side in FIG. 4) of the tubular portion 90 degrees radially outward. And a flange 22. The axial stopper rubber elastic body 13 is brought into contact with the power plant side bracket and the flange 22 so that the relative movement in the axial direction of both the cylinders 10 and 11 is restricted.

  The mount body 1 is provided between an axial stopper rubber elastic body 13 and one main spring portion 12b (the right main spring portion 12b in FIG. 1), and couples them together. 13 is provided between the first connecting rubber elastic body 14 for holding (corresponding to the "first connecting elastic body" of the present invention), the axial stopper rubber elastic body 13 and the lower axial stopper portion 12d. It further includes a second connecting rubber elastic body 15 (corresponding to the “second connecting elastic body” of the present invention) for holding the levers together and holding the axial stopper rubber elastic body 13. The first and second connecting rubber elastic bodies 14 and 15 are formed integrally with the rubber elastic body 12 and the axial stopper rubber elastic body 13.

  More specifically, the first connecting rubber elastic body 14 has an end portion on the main spring portion 12b side in the circumferential direction of the radially inner end edge of the axial stopper rubber elastic body 13 (the upper end portion (right end portion in FIG. 1). ))) And the circumferential center of the radially outer edge (lower end (right end) in FIG. 1) of the end surface on the one axial side (front side in FIG. 1) of the main spring portion 12b. It is provided so as to extend in the direction, and protrudes radially inward from the inner peripheral surface of the outer cylindrical body 11.

  More specifically, the second connecting rubber elastic body 15 has an end portion (a lower end portion in FIG. 1) of the radially inner end edge portion of the axial stopper rubber elastic body 13 on the circumferential axial stopper portion 12 d side. Left end portion)) and the base end edge portion (lower end edge portion in FIG. 1) at the end portion on the one axial side (front side in FIG. 1) of the axial direction stopper portion 12d side of the main spring portion 12b in the circumferential direction Between the two ends (the right end in FIG. 1).

-Effect-
As described above, according to the present embodiment, the first connecting rubber elastic body 14 provided between the axial stopper rubber elastic body 13 and the one main spring portion 12b and connecting the two to each other, and the axial stopper rubber. Since the second connecting rubber elastic body 15 provided between the elastic body 13 and the axial direction stopper portion 12d and connecting the both is provided, the first and second connecting rubber elastic bodies 14, 15 are provided. Thus, the axial stopper rubber elastic body 13 can be reliably held at that position. For this reason, the flange for installing the axial stopper rubber elastic body 13 is not required in the outer cylinder 11 as in the conventional case, and the structure can be simplified and the cost can be reduced.

  Further, the axial stopper rubber elastic body 13 is seen from the radially outer portion of the portion where the one main spring portion 12b is disposed as viewed from the axial direction to the radially outer portion of the portion where the axial direct stopper portion 12d is disposed. The first connecting rubber is provided between the axial stopper rubber elastic body 13 and the one main spring portion 12b so as to connect the two to each other. The elastic body 14, and the second connecting rubber elastic body 15 provided between the axial stopper rubber elastic body 13 and the axial direction stopper portion 12d and connecting the two to each other can have a simple structure.

  In addition, since the first and second connecting rubber elastic bodies 14 and 15 are integrally formed with the rubber elastic body 12 and the axial stopper rubber elastic body 13, the first and second connecting rubber elastic bodies 14 and 15 are used as shafts. The direction stopper rubber elastic body 13 can be more reliably held at that position.

  By the way, both end portions in the circumferential direction of the main spring portions 12a and 12b are more susceptible to stress than in the central portion in the circumferential direction, and one end portion in the circumferential direction of one main spring portion 12a and the axial stopper rubber elastic body 13 If the 1st connection rubber elastic body 14 is provided in the middle, durability of one main spring part 12a will deteriorate.

  Here, according to this embodiment, the first connecting rubber elastic body 14 is provided between the axial stopper rubber elastic body 13 and the central portion of the one main spring portion 12b in the circumferential direction where stress is hardly generated. The deterioration of the durability of the one main spring portion 12b can be suppressed.

(Other embodiments)
In the above embodiment, the vibration isolator is applied to the engine mount. However, the present invention is not limited to this, and may be applied to a vehicle body mount, a suspension member mount, or the like.

  Moreover, in the said embodiment, although the axial direction stopper rubber elastic body 13 is provided so that substantially the whole may be located in the axial direction outer side rather than the end surface of the axial direction one side of the outer cylinder 11, it is at least one part May be provided so as to be positioned on the outer side in the axial direction than the end surface on the one side in the axial direction of the outer cylindrical body 11.

  Moreover, in the said embodiment, the axial direction rubber elastic body 13 is the radial direction of the part by which the axial downward direction stopper part 12d below is arrange | positioned from the radial outside part of the part by which one main spring part 12b is arrange | positioned. However, the present invention is not limited to this. For example, a lower axially-directed stopper portion 12d is arranged from the radially outer portion of the portion where the other main spring portion 12a is arranged. An upper axially-directed stopper portion 12c is disposed from the radially outer portion of the portion where either one of the main spring portions 12a, 12b is disposed. You may provide over the range to the part of the radial direction outer side of the made part. When it is provided over a range from the radially outer portion of the portion where the other main spring portion 12a is disposed to the radially outer portion of the portion where the lower axial direction stopper portion 12d is disposed, One connecting rubber elastic body 14 is provided between the axial stopper rubber elastic body 13 and the other main spring portion 12a. On the other hand, it is provided over a range from the radially outer portion of the portion where either one of the main spring portions 12a, 12b is disposed to the radially outer portion of the portion where the upper axial stopper portion 12c is disposed. In this case, the first coupling rubber elastic body 14 is disposed between the axial stopper rubber elastic body 13 and one of the main spring portions 12a and 12b, and the second coupling rubber elastic body 15 is disposed along the axial stopper rubber elastic body 13. And the upper axial direction stopper portion 12c.

  Moreover, in the said embodiment, although the 1st connection rubber elastic body 14 is made into the shape and structure as mentioned above, it is provided between the axial stopper rubber elastic body 13 and one main spring part 12b, and these both are attached. As long as they are connected to each other, their shapes and structures are not limited to those described above. For example, you may provide the 1st connection rubber elastic body 14 over the radial direction substantially whole region of the main spring part 12b. However, from the viewpoint of weight reduction, it is desirable that it is not large.

  In the above embodiment, the second connecting rubber elastic body 15 has the shape and structure as described above. However, the second connecting rubber elastic body 15 is provided between the axial stopper rubber elastic body 13 and the lower axial direction stopper portion 12d. As long as they are connected to each other, the shape and structure are not limited to those described above.

  The present invention is not limited to the embodiments, and can be implemented in various other forms without departing from the spirit or main features thereof.

  As described above, the above-described embodiment is merely an example in all respects and should not be interpreted in a limited manner. The scope of the present invention is defined by the claims, and is not limited by the specification. Further, all modifications and changes belonging to the equivalent scope of the claims are within the scope of the present invention.

  As described above, the vibration isolator according to the present invention can be applied to applications that require a simplified structure and a low cost.

A Engine mount (anti-vibration device)
DESCRIPTION OF SYMBOLS 1 Mount main body 10 Inner cylinder 11 Outer cylinder 12 Rubber elastic body (elastic body)
12a, 12b Main spring part 12d Axis direction stopper part 13 Axial direction stopper rubber elastic body (Axial direction stopper elastic body)
14 1st connection rubber elastic body (1st connection elastic body)
15 Second connected rubber elastic body (second connected elastic body)

Claims (4)

An inner cylinder, an outer cylinder provided around the inner cylinder, an elastic body provided between the two cylinders and connecting the two cylinders to each other, and at least a part of the outer cylinder An anti-vibration device provided with an axial stopper elastic body that is provided so as to be positioned on an axially outer side than an end surface on one axial side of the cylindrical body, and that restricts relative movement in the axial direction of the both cylinders,
The elastic body includes a pair of main spring portions extending from the outer peripheral surface of the inner cylindrical body to both sides in the first axial direction and connected to the inner peripheral surface of the outer cylindrical body, and an inner peripheral surface of the outer cylindrical body. A shaft directing direction stopper part that protrudes inward in the second axis directing direction orthogonal to the first axis directing direction and restricts relative movement of the two cylinders in the second axis directing direction;
A first connecting elastic body provided between the axial stopper elastic body and the one main spring portion and connecting the two to each other;
A vibration isolator, further comprising: a second connecting elastic body provided between the axial stopper elastic body and the axial perpendicular stopper portion and connecting the two to each other. The vibration isolator according to claim 1, wherein
The axial stopper elastic body extends from a radially outer portion of the portion where the one main spring portion is disposed as viewed from the axial direction to a radially outer portion of the portion where the axial direct stopper portion is disposed. A vibration isolator provided to extend in the circumferential direction over a range. The vibration isolator according to claim 1 or 2,
The first and second connecting elastic bodies are formed integrally with the elastic body and the axial stopper elastic body. In the vibration isolator as described in any one of Claims 1-3,
The anti-vibration device according to claim 1, wherein the first connecting elastic body is provided between the axial stopper elastic body and a circumferential central portion of the one main spring portion.

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