JP2021089051A - Cylindrical vibration damper with bracket - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve functional mutual complementation between an outer cylindrical member and a tubular portion of an outer side bracket, and at the same time to achieve weight reduction, a cylindrical vibration isolator with a bracket having a new structure. To provide. SOLUTION: A tubular mount main body 12 in which an inner member 16 and an outer tubular member 18 are connected by a main body rubber elastic body 20, and an outer bracket 14 having a tubular portion 34 to which the outer tubular member 18 is press-fitted and fixed. In the tubular anti-vibration device 10 with a bracket including On the other hand, the outer bracket 14 is provided with a notch 38 at the axial end of the tubular portion 34 where the axial stopper 52 is displaced in the circumferential direction, and the tubular portion 34 is provided. The axial length of the rubber is shortened by the notch 38, and the outer cylinder member 18 is exposed to the outer periphery through the notch 38. [Selection diagram] Fig. 1

Description

The present invention relates to a tubular vibration isolator with a bracket used for an automobile engine mount or the like.

Conventionally, when the tubular mount body is mounted on a vehicle, an outer bracket having a tubular portion to which the tubular mount body is press-fitted and fixed has been adopted. For example, it is disclosed in Japanese Patent Application Laid-Open No. 6-054938 (Patent Document 1).

By the way, the axial length of the outer tubular member is designed according to the axial free length of the main body rubber elastic body determined by the required characteristics, the setting of the pull-out drag force by press-fitting and fixing to the tubular portion, and the like. On the other hand, the outer cylinder member is relatively thin for reasons such as manufacturing and processing, and it may be difficult to realize the required strength characteristics by itself, and the outer bracket is generally expected to have a reinforcing effect. ing. In this way, it is considered that the outer tubular member and the tubular portion of the outer bracket are functionally complemented to each other so as to exhibit the desired function by being fixed to each other by press fitting. ..

Jikkenhei 6-054938 Gazette

However, as a result of examination by the present inventor, in a tubular anti-vibration device with a bracket having a conventional structure in which the entire outer tubular member is press-fitted and fixed to the tubular portion of the outer bracket as described in Patent Document 1. , It was found that the functional mutual complementation between the outer tubular member and the tubular portion is not yet sufficient. In particular, in recent years, weight reduction of members has been required from the viewpoint of reducing the environmental burden including improvement of fuel efficiency of vehicles, but it is necessary to improve the functional mutual complementation between the outer tubular member and the tubular portion. It became clear that the weight reduction of the members can be achieved at the same time.

The problem to be solved by the present invention is a cylinder with a bracket having a novel structure, which can improve the functional mutual complementation between the outer cylinder member and the tubular portion of the outer bracket, and can also achieve weight reduction at the same time. The purpose is to provide a mold vibration isolator.

Hereinafter, preferred embodiments for grasping the present invention will be described, but each of the embodiments described below is described as an example, and not only can be appropriately combined with each other and adopted, but also described in each embodiment. The plurality of components of the above can also be recognized and adopted independently as much as possible, and can be appropriately adopted in combination with any of the components described in another embodiment. Thereby, in the present invention, various other aspects can be realized without being limited to the aspects described below.

The first aspect is a bracket including a tubular mount body in which an inner member and an outer tubular member are connected by a rubber elastic body of the main body, and an outer bracket having a tubular portion to which the outer tubular member is press-fitted and fixed. In the tubular anti-vibration device, the tubular mount body is partially provided with an axial stopper in the circumferential direction that limits the relative displacement amount of the inner member and the outer tubular member in the direction perpendicular to the axis. On the other hand, the outer bracket is provided with a notch at the axial end of the tubular portion where the axial stopper is displaced in the circumferential direction, and the axial length of the tubular portion is the same. The outer cylinder member is shortened by the notch and is exposed to the outer periphery through the notch.

According to the tubular anti-vibration device with a bracket having a structure according to this aspect, the axial length of the tubular portion of the outer bracket is increased at the circumferential position corresponding to the axial stopper, so that the tubular portion has a tubular shape. The reinforcing function required for the part is realized. Further, the press-fitting fixing force is efficiently secured in the portion of the tubular portion having a relatively large axial length. Therefore, even if the outer tubular member is exposed by providing a notch in the portion where the axial stopper in the tubular portion is disengaged in the circumferential direction, the load bearing performance against the stopper load and the press-fitting and fixing to the tubular portion of the tubular mount body are performed. The intended function such as securing the force (drag force) is fully exhibited. As described above, by improving the functional mutual complementation of the tubular portions of the outer tubular member, it is possible to reduce the weight of the outer bracket by forming the notch portion.

In the second aspect, in the tubular vibration isolator with a bracket described in the first aspect, the notches are formed at both ends of the tubular portion of the outer bracket in the axial direction.

According to the tubular anti-vibration device with a bracket having a structure according to this embodiment, the outer bracket is further reduced in weight by forming notches at both ends of the tubular portion of the outer bracket in the axial direction. Is planned. In addition, by providing notches on both sides of the tubular portion in the axial direction, the press-fitting position of the outer tubular member with respect to the tubular portion is close to the center in the axial direction, and the fixing force due to press-fitting is well-balanced in the axial direction. It will be demonstrated.

The third aspect is that in the tubular anti-vibration device with a bracket described in the first or second aspect, the axial length of the outer tubular member is substantially constant over the entire circumference. ..

According to the tubular anti-vibration device with a bracket having a structure according to this aspect, for example, the directionality of the outer tubular member in the circumferential direction can be eliminated, and the tubular mount main body can be easily manufactured. Since the axial length of the outer cylinder member is substantially constant in the circumferential direction, even if the outer bracket is provided with a notch, the area where the rubber elastic body of the main body is fixed to the outer cylinder member is secured. be able to.

A fourth aspect is the tubular vibration isolator with a bracket according to any one of the first to third aspects, wherein the tubular portion of the outer bracket is thicker than the outer tubular member. It is what has been done.

According to the tubular vibration isolator with a bracket having a structure according to this aspect, the tubular portion of the outer bracket is relatively thick, so that the tubular portion is provided in the portion where the shaft straight stopper is provided. Reinforcement of the load bearing performance is advantageously realized, and damage to the outer tubular member and the tubular portion due to the input of the stopper load is avoided.

A fifth aspect is the tubular anti-vibration device with a bracket according to any one of the first to fourth aspects, wherein the notch is formed in the circumferential direction of the rubber elastic body of the main body to the outer cylinder member. The effective free length in the axial direction of the main body rubber elastic body that is formed at a position including the fixed portion and connects the inner member and the outer tubular member is such that the notch portion in the tubular portion of the outer bracket is formed. It is considered to be longer than the axial length of the formed portion.

According to the tubular anti-vibration device with a bracket having a structure according to this embodiment, even if a notch is provided in the tubular portion of the outer bracket, the main body rubber is exposed to the outer periphery through the notch in the outer cylinder member. By fixing the elastic body, the area where the main body rubber elastic body is fixed to the outer cylinder member is secured. In addition, it is possible to secure a large free length in the axial direction of the main body rubber elastic body while reducing the weight by the notch, and the vibration isolation characteristics such as the spring characteristics and damping characteristics of the main body rubber elastic body can be obtained with a large degree of freedom. It becomes possible to set.

According to the present invention, in a tubular anti-vibration device with a bracket, it is possible to improve the functional mutual complementation between the outer tubular member and the tubular portion of the outer bracket, and at the same time, it is possible to achieve weight reduction. ..

Perspective view showing an engine mount as the first embodiment of the present invention. A perspective view showing the engine mount of FIG. 1 at another angle. Front view of the engine mount shown in FIG. Top view of the engine mount shown in FIG. Right side view of the engine mount shown in FIG. VI-VI sectional view of FIG. VII-VII sectional view of FIG.

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

In FIGS. 1 to 7, an engine mount 10 for an automobile is shown as a first embodiment of a tubular vibration isolator with a bracket having a structure according to the present invention. The engine mount 10 has a structure in which the tubular mount body 12 is attached to the outer bracket 14. Further, the tubular mount main body 12 has a structure in which the inner member 16 and the outer tubular member 18 are connected by the main body rubber elastic body 20. In the following description, as a general rule, the vertical direction refers to the vertical direction in FIG. 3, and the horizontal direction refers to the horizontal direction in FIG.

As shown in FIGS. 6 and 7, the inner member 16 is a hard member made of metal or synthetic resin, and has a substantially cylindrical shape. The length dimension of the inner member 16 in the axial direction is substantially constant over the entire circumference. The inner member 16 has a substantially constant thickness dimension over the entire circumference. The specific shape of the inner member 16 is not particularly limited, and may be, for example, a solid shaft shape such as a cylindrical shape or a polygonal tubular shape other than a cylinder.

The outer cylinder member 18 is a hard member made of metal or synthetic resin. The outer cylinder member 18 has a substantially cylindrical shape having a larger diameter than the inner member 16 and is thinner than the inner member 16. Both the inner diameter dimension and the outer diameter dimension of the outer cylinder member 18 are set to be substantially constant over the entire length in the axial direction. The thickness of the outer cylinder member 18 is substantially constant over the entire circumference. The axial length dimension of the outer cylinder member 18 is substantially constant over the entire circumference. As shown in FIG. 6, the outer cylinder member 18 has a smaller axial length than the inner member 16. As the material for forming the outer cylinder member 18, a metal such as iron is preferably selected in consideration of press-fitting and fixing the outer bracket 14 to the tubular portion 34, which will be described later.

As shown in FIG. 7, the inner member 16 is arranged in a state of being inserted into the outer cylinder member 18, and the main body rubber elastic body 20 is provided between the inner member 16 and the outer cylinder member 18 in the radial direction. The main body rubber elastic body 20 includes an inner covering portion 22 fixed to the outer peripheral surface of the inner member 16, an outer covering portion 24 fixed to the inner peripheral surface of the outer cylinder member 18, and the inner covering portion 22 and the outer covering portion. A pair of connecting portions 26, 26 for connecting the 24 to each other are provided.

The connecting portions 26, 26 are provided on both sides in the left-right direction with respect to the inner member 16 (inner covering portion 22). The connecting portions 26, 26 extend in the substantially radial direction across the inner covering portion 22 and the outer covering portion 24. In the connecting portions 26, 26, the elastic central axis extending in the length direction (substantially radial direction) is gradually tilted downward from the inner covering portion 22 toward the outer covering portion 24. The connecting portions 26, 26 are integrally formed with the inner covering portion 22 and the outer covering portion 24.

A first curl hole 28 penetrating in the axial direction is formed on the upper side of the connecting portion 26. A second curl hole 30 penetrating in the axial direction is formed on the lower side of the connecting portion 26.

A pair of stopper rubbers 32, 32 are provided on the outer covering portion 24 of the main body rubber elastic body 20. The stopper rubbers 32, 32 are partially provided in the circumferential direction, and are formed in a protruding shape protruding from the outer covering portion 24 toward the inner covering portion 22. The stopper rubbers 32, 32 are arranged so as to face each other with the inner covering portion 22 (inner member 16) interposed therebetween in the vertical direction. The stopper rubbers 32, 32 are provided at positions separated from the inner covering portion 22 by a predetermined distance in the vertical direction. The stopper rubbers 32, 32 are narrow in the circumferential direction and narrow in the axial direction toward the protruding tip side, and have a tapered shape. The protruding tip surface of the stopper rubber 32 is a substantially flat surface that extends substantially orthogonal to the vertical direction.

The upper stopper rubber 32 projects into the first curl hole 28, and the lower stopper rubber 32 projects into the second curl hole 30. The stopper clearance (gap) between the upper stopper rubber 32 and the inner covering portion 22 (inner member 16) is provided by the first curl hole 28. The stopper clearance between the lower stopper rubber 32 and the inner covering portion 22 is provided by the second curl hole 30.

The tubular mount body 12 having such a structure is attached to the outer bracket 14. The outer bracket 14 is a highly rigid member made of metal, synthetic resin, or the like. The outer side bracket 14 includes a tubular portion 34. The tubular portion 34 has a substantially cylindrical shape as a whole, and the inner peripheral surface is a fitting surface 36 having a substantially circular cross section. The tubular portion 34 is thicker than the outer tubular member 18, and has a large deformation rigidity.

As shown in FIGS. 1 to 5, a plurality of notches 38 are formed at the axial end of the tubular portion 34. The notch 38 has a concave shape that opens at the axial end surface of the tubular portion 34. The notch 38 is formed so as to penetrate the tubular portion 34 in the radial direction. The notch 38 is partially provided in the circumferential direction on both the left and right sides of the tubular portion 34. The inner surface of the notch 38 has a substantially flat central portion in the circumferential direction, and both end portions in the circumferential direction are formed of smooth curved surfaces having no corners, so that the notch 38 in the tubular portion 34 can be removed. It is smoothly continuous with the axial end face of the part.

The cutouts 38 are formed at both ends of the tubular portion 34 in the axial direction. In the present embodiment, the notches 38 and 38 on both sides in the axial direction are substantially symmetrical to each other. The tubular portion 34 is a portion in which the axial center of the portion (short portion 42 described later) in which the cutout portions 38, 38 are formed in the circumferential direction is separated from the notch portions 38, 38 in the circumferential direction (long portion described later). It is located at substantially the same position as the center in the axial direction of 40).

Since the tubular portion 34 is provided with the notch portion 38, the length dimension in the axial direction changes in the circumferential direction as shown in FIGS. That is, the axial length dimension of the tubular portion 34 is partially shortened in the circumferential direction by the notch 38, and the axial length of the portion formed by the notch 38 in the circumferential direction is the circumferential direction. It is shorter than the axial length of the portion detached from the notch 38. As a result, in the tubular portion 34, the portion that is detached from the notch 38 in the circumferential direction is a long portion 40 having a long axial length, and the portion where the notch 38 is formed in the circumferential direction is formed. It is a short portion 42 having a short axial length.

By providing such a notch 38, the weight of the outer bracket 14 including the tubular portion 34 is reduced. The axial length dimension of the long portion 40 is longer than the axial effective free length of the connecting portions 26, 26 of the main body rubber elastic body 20, and the axial length dimension of the short portion 42. Is shorter than the effective free length in the axial direction of the connecting portions 26, 26 of the main body rubber elastic body 20.

The outer bracket 14 includes a mounting portion 44. As shown in FIGS. 3 and 7, the mounting portion 44 includes a pair of fastening portions 46, 46 extending downward from the tubular portion 34 and projecting to both the left and right sides at the lower end portion. The fastening portion 46 has a bolt hole 48 penetrating in the vertical direction. In the present embodiment, the tubular portion 34 and the mounting portion 44 are integrally formed.

The outer tubular member 18 of the tubular mount body 12 is press-fitted and fixed to the tubular portion 34 of the outer bracket 14, so that the tubular mount body 12 is attached to the outer bracket 14 to form the engine mount 10. There is. As shown in FIG. 6, the axial length dimension of the outer tubular member 18 is substantially the same as the axial length dimension of the long portion 40 in the tubular portion 34. Therefore, as shown in FIG. 5, the axial length dimension of the outer tubular member 18 is larger than the axial length dimension of the short portion 42 in the tubular portion 34.

In the mounted state of the tubular mount main body 12 with respect to the outer bracket 14, the notch 38 is provided at a position where the stopper rubbers 32 and 32 are detached in the circumferential direction as shown in FIGS. In other words, the stopper rubbers 32, 32 are positioned in the circumferential direction with respect to the long portions 40, 40 of the outer bracket 14. In the mounted state of the tubular mount body 12 with respect to the outer bracket 14, the notch 38 is provided at a position including the fixed portion of the connecting portion 26 with respect to the outer tubular member 18 in the circumferential direction.

As shown in FIG. 6, the outer tubular member 18 attached to the tubular portion 34 of the outer bracket 14 is press-fitted substantially entirely in the axial direction with respect to the elongated portion 40 of the tubular portion 34. Further, as shown in FIG. 5, the outer tubular member 18 attached to the tubular portion 34 has a central portion in the axial direction press-fitted into the short portion 42 of the tubular portion 34, and the outer tubular member 18 has an outer tubular member 18. Both end portions in the axial direction protrude outward in the axial direction from the tubular portion 34 in the portion where the notch portion 38 is formed in the circumferential direction. In other words, in the outer tubular member 18, both end portions in the axial direction are partially exposed to the outer peripheral side of the tubular portion 34 in the circumferential direction through the plurality of notches 38.

The press-fitting area of the outer tubular member 18 into the tubular portion 34 is secured in the long portion 40 of the tubular portion 34 to be larger than that of the short portion 42 of the tubular portion 34. As a result, the press-fitting and fixing force of the outer tubular member 18 and the tubular portion 34 is sufficiently secured in the long portion 40 even if the tubular portion 34 is provided with a plurality of cutout portions 38.

Further, since the notches 38 are provided at the same positions in the circumferential direction of the tubular portion 34 at both ends in the axial direction of the tubular portion 34, the outer tubular member 18 is press-fitted into the short portion 42 of the tubular portion 34. The part to be formed is the central part in the axial direction. Therefore, the fixing force due to the press fitting of the outer tubular member 18 into the tubular portion 34 is applied in a well-balanced manner in the axial direction over the entire circumference.

In the engine mount 10, the inner member 16 is attached to a power unit (not shown), the outer bracket 14 is attached to the vehicle body 50 by a bolt (not shown) inserted into the bolt holes 48, 48, and the outer cylinder member 18 is attached to the outer side. It is attached to the vehicle body 50 via the bracket 14 (see FIG. 5). As a result, a power unit (not shown) is attached to the vehicle body 50 via the engine mount 10. The inner member 16 can be attached to a power unit (not shown) via an inner bracket (not shown).

Then, with respect to the input of normal vibration, the vibration damping effect based on the vibration damping action and the vibration insulating action due to the elastic deformation of the connecting portions 26, 26 of the main body rubber elastic body 20 is exhibited.

In the outer cylinder member 18, the portion where the connecting portions 26, 26 of the main body rubber elastic body 20 are provided is not expected to input a large load as much as the portion where the axial straight stoppers 52, 52, which will be described later, are provided. Therefore, as shown in FIG. 3, a notch 38 is provided in the tubular portion 34 of the outer bracket 14 in the portion where the connecting portions 26, 26 are provided in the circumferential direction. In this way, the connecting portions 26, 26 can be provided in the circumferential direction without avoiding the notch 38, and are provided at positions in the circumferential direction different from the stopper rubbers 32, 32 constituting the axial stoppers 52, 52. The connecting portions 26, 26 can be arranged with a large degree of freedom.

Moreover, since the outer cylinder member 18 has a substantially constant axial dimension over the entire circumference, the fixed area of the connecting portions 26, 26 on the inner peripheral surface of the outer cylinder member 18 is notched in the tubular portion 34. Even if the portion 38 is formed, it is not affected. Therefore, even if the connecting portions 26, 26 are arranged at the portions where the short portions 42, 42 are located in the circumferential direction, the adhesive strength of the connecting portions 26, 26 to the outer cylinder member 18 can be sufficiently ensured.

Further, the effective free length in the axial direction of the connecting portions 26, 26 connecting the inner member 16 and the outer cylinder member 18 is equal to or longer than the axial length of the short portions 42, 42 of the outer bracket 14. There is. Therefore, characteristics such as the spring and damping performance of the main body rubber elastic body 20 can be set with a large degree of freedom.

The short portions 42, 42 of the outer bracket 14 are attached to the central portion of the outer tubular member 18 in the axial direction, and the portion of the tubular portion 34 provided with the notch 38 in the axial direction of the outer tubular member 18. The central portion is reinforced by the tubular portion 34. As a result, the load-bearing performance of the outer cylinder member 18 is increased in the central portion in the axial direction in which the load applied from the connecting portions 26, 26 of the rubber elastic body 20 of the main body to the outer cylinder member 18 is larger than both ends in the axial direction. It is sufficiently secured by the reinforcing action of the tubular portion 34.

When a large load is input in the vertical direction, the inner member 16 and the outer cylinder member 18 indirectly come into contact with each other via the stopper rubbers 32 and 32 and the inner covering portion 22, so that the inner member 16 and the outer cylinder member 18 come into contact with each other indirectly. The amount of relative displacement in the vertical direction of is limited. As a result, the amount of deformation of the connecting portions 26, 26 is limited, and damage due to excessive deformation of the connecting portions 26, 26 is avoided. As described above, in the tubular mount main body 12, the axial stoppers 52 and 52 that limit the relative displacement amount of the inner member 16 and the outer tubular member 18 in the direction perpendicular to the axis are configured to include the stopper rubbers 32 and 32. The shaft straight stoppers 52 and 52 are provided on the formed portions of the stopper rubbers 32 and 32.

The notch 38 is provided in a portion where the stopper rubbers 32 and 32 are removed in the circumferential direction, and the axial dimension of the tubular portion 34 is increased in the portion where the stopper rubbers 32 and 32 are provided in the circumferential direction. As a result, even if the stopper load is partially input to the outer cylinder member 18 in the circumferential direction at the formed portions of the stopper rubbers 32 and 32, the outer cylinder member 18 is long in the tubular portion 34 at the input portion of the stopper load. It is effectively reinforced by the portion 40. Therefore, the load-bearing performance of the outer cylinder member 18 is effectively enhanced by the tubular portion 34 in the portion where the stopper load directly acts, and damage to the outer cylinder member 18 due to the input of the stopper load is avoided. ..

In this way, by providing the notch 38 in the tubular portion 34 while avoiding the constituent portions of the shaft straight stoppers 52 and 52 by the stopper rubbers 32, 32, the outer cylinder member 18 is reduced in weight while reducing the weight of the outer bracket 14. Can be effectively reinforced at the input portion of the stopper load.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited by the specific description thereof. For example, the specific shape of the notch 38, such as the length and depth in the circumferential direction, can be changed as appropriate.

The notches 38 do not necessarily have to be provided at both ends in the axial direction. When the notches 38 are provided at both ends in the axial direction, the notches 38 on both sides in the axial direction may be provided at different positions in the circumferential direction.

In the above-described embodiment, the notch 38 is provided at two positions of the tubular portion 34 in the circumferential direction, but the notch 38 is provided at only one position of the tubular portion 34 in the circumferential direction. It may be provided at three or more places.

In the above embodiment, the example in which the shaft straight stopper 52 is provided at two places in the circumferential direction is shown, but the shaft straight stopper 52 may be provided at only one place in the circumferential direction, or at three or more places. It may be provided in.

The shaft straight stopper 52 may be formed of, for example, a stopper rubber protruding from the inner member 16 toward the outer cylinder member 18. The shaft straight stopper 52 is not limited to a stopper rubber made of a rubber elastic body to the inside, and for example, a structure in which the surface of a member made of metal or synthetic resin is covered with the rubber elastic body. It can also be configured by the stopper member of. Further, the stopper rubber (stopper member) may have a separate structure that is not fixed to either the inner member 16 or the outer cylinder member 18.

The connecting portions 26, 26 of the main body rubber elastic body 20 may be fixed to the outer cylinder member 18 at a portion where the notch portion 38 is detached in the circumferential direction. According to this, even with respect to the load applied from the connecting portions 26, 26 to the outer cylinder member 18, the reinforcing effect of the outer cylinder member 18 by the tubular portion 34 is exhibited in a wide range in the axial direction.

In the outer bracket 14 of the above embodiment, the tubular portion 34 and the mounting portion 44 are integrally formed, and the tubular portion 34 is integrally connected to the mounting portion 44 in a part in the circumferential direction. In the outer bracket 14, the tubular portion and the mounting portion may be separate bodies. Specifically, for example, the cylindrical portion and the mounting portion are formed as separate bodies by fixing the cylindrical portion to the mounting portion formed by a press fitting or the like by means such as welding. An outer bracket having a structure can be realized.

The outer cylinder member 18 of the above embodiment has a constant axial dimension over the entire circumference, but the axial dimension of the outer cylinder member may change in the circumferential direction. In that case, the axial dimension of the press-fitted portion into the short portion 42 may be larger or smaller than the axial dimension of the press-fitted portion into the long portion 40.

The outer tubular member 18 may project outward in the axial direction from the elongated portion 40 of the tubular portion 34 of the outer bracket 14 at the portion where the axial stoppers 52, 52 (stopper rubbers 32, 32) are provided.

The outer cylinder member 18 does not have to have a straight shape as a whole, and for example, a flange-shaped portion protruding to the outer periphery may be provided at an end portion in the axial direction. According to this, the strength of the outer cylinder member 18 is improved, and the pull-out drag force against the outer bracket 14 is improved. As described above, the outer cylinder member 18 does not need to have a substantially constant outer diameter dimension and inner diameter dimension over the entire length in the axial direction. Further, the thickness dimension of the outer cylinder member 18 may change in the circumferential direction.

In the above embodiment, the inner member 16 and the outer cylinder member 18 are both fixed at the time of molding the main body rubber elastic body 20, but for example, the inner member 16 is retrofitted to the main body rubber elastic body 20. You may have. In this case, the inner member 16 can be attached without being fixed to the main body rubber elastic body 20.

In the above embodiment, the outer bracket 14 is a separate part from the vehicle body 50, but for example, the outer bracket may be composed of a part of the vehicle body. Specifically, for example, an arm member having an arm eye having a cylindrical inner peripheral surface is provided on the vehicle body, and the outer bracket may be formed by the arm member that is a part of the vehicle body. it can.

As the tubular mount body, a fluid-filled tubular vibration isolator having a fluid chamber in which an incompressible fluid is sealed can also be adopted.

10 Engine mount (cylindrical anti-vibration device with bracket)
12 Cylindrical mount body 14 Outer side bracket 16 Inner member 18 Outer tubular member 20 Main body rubber elastic body 22 Inner covering part 24 Outer covering part 26 Connecting part 28 First turning hole 30 Second turning hole 32 Stopper rubber 34 Cylindrical Part 36 Fitting surface 38 Notch part 40 Long part 42 Short part 44 Mounting part 46 Fastening part 48 Bolt hole 50 Vehicle body 52 Axis straight stopper

Claims (5)

A tubular mount body in which the inner member and the outer tubular member are connected by a rubber elastic body, and
In a tubular anti-vibration device with a bracket that includes an outer bracket having a tubular portion to which the outer tubular member is press-fitted and fixed.
The tubular mount body is partially provided with an axial stopper in the circumferential direction that limits the relative displacement amount of the inner member and the outer tubular member in the direction perpendicular to the axis.
The outer bracket is provided with a notch at the axial end of the tubular portion where the axial stopper is detached in the circumferential direction, and the axial length of the tubular portion is the notch. A tubular anti-vibration device with a bracket that is shortened by a bracket and the outer tubular member is exposed to the outer periphery through the notch. The tubular anti-vibration device with a bracket according to claim 1, wherein the notches are formed at both ends of the tubular portion of the outer bracket in the axial direction. The tubular anti-vibration device with a bracket according to claim 1 or 2, wherein the axial length of the outer tubular member is substantially constant over the entire circumference. The tubular vibration isolator with a bracket according to any one of claims 1 to 3, wherein the tubular portion of the outer side bracket is thicker than the outer cylinder member. The notch portion is formed at a position including a portion of the main body rubber elastic body fixed to the outer cylinder member in the circumferential direction.
The effective free length in the axial direction of the rubber elastic body of the main body connecting the inner member and the outer tubular member shall be equal to or greater than the axial length of the portion of the tubular portion of the outer bracket on which the notch is formed. The tubular anti-vibration device with a bracket according to any one of claims 1 to 4.

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