JP2021091335A - Vibration control device - Google Patents

Abstract

To provide a vibration control device which can temporarily fasten a stopper while inhibiting increase of the number of components and work hours.SOLUTION: A vibration control device 12 includes: an outer cylinder 18; an inner cylinder 20; vibration control rubber 22 disposed between the outer cylinder 18 and the inner cylinder 20; a stopper 30 which is attached to the lower end side of the inner cylinder 20 and includes a flat part 34 whose general shape is formed into a substantially discoid shape and a facing surface 30B facing the inner cylinder 20 at the radial inner side of the flat part 34; and a projection 36 which is provided protruding to the side facing the inner cylinder 20 at a radial outer portion of the facing surface 30B in the flat part 34 and which is press-fitted in the vibration control rubber 22 at the radial outer side of the inner cylinder 20.SELECTED DRAWING: Figure 2

Description

The present invention relates to an anti-vibration device.

In Patent Document 1 below, anti-vibration rubber is interposed between the outer cylinder and the inner cylinder, the vibrating body is fixed to the outer cylinder side, and the protruding portion of the inner cylinder is fitted into a holder provided on the supported body. The vehicle vibration isolation mechanism is disclosed. As a holder, a holder that is separately formed in a ring shape and mounted on the surface of the supported body facing the inner cylinder, or a holder formed by cutting up the central portion of the supported body toward the inner cylinder side. It is disclosed. As a result, the inner cylinder and the holder cannot be easily separated from each other, so that the supported body can be temporarily fastened to the inner cylinder of the vehicle vibration isolation mechanism.

Japanese Unexamined Patent Publication No. 61-180040

However, in the vehicle vibration isolation mechanism described in Patent Document 1, when the holder (stopper) is attached to the surface of the supported body on the side facing the protruding portion of the inner cylinder, the work man-hours increase and the parts The score may increase. Further, in the holder formed by cutting and raising the central portion of the supported body toward the inner cylinder side, the surface facing the end surface of the inner cylinder cannot be formed on the supported body, so that the inner cylinder is formed with respect to the outer cylinder. Displacement cannot be regulated, and the function as a vibration isolator may deteriorate.

In consideration of the above facts, an object of the present invention is to obtain a vibration isolator capable of temporarily fixing a stopper while suppressing an increase in the number of parts and work man-hours.

The anti-vibration device according to the first aspect is attached to an outer cylinder, an inner cylinder, an elastic body interposed between the outer cylinder and the inner cylinder, and one end portion of the inner cylinder in the axial direction. A stopper having a flat portion having a substantially disk-like overall shape and a facing surface facing the inner cylinder inside the flat portion in the radial direction, and a radial outer side of the facing surface in the flat portion. The portion is provided so as to project toward the side facing the inner cylinder, and includes a protrusion that is press-fitted into the elastic body on the radial outer side of the inner cylinder.

According to the anti-vibration device according to the first aspect, a flat portion having a substantially disk-like overall shape is provided on one end side of the inner cylinder of the anti-vibration device in the axial direction, and the diameter of the flat portion is provided. A stopper having a facing surface facing the inner cylinder is attached to the inside in the direction. Therefore, in the vibration isolator, the displacement of the inner cylinder with respect to the outer cylinder can be regulated by the stopper. Further, a protrusion is provided on the radial outer side of the facing surface of the flat portion so as to project toward the side facing the inner cylinder. Therefore, the stopper can be press-fitted into the elastic body on the radial outer side of the inner cylinder. As a result, since it is not necessary to provide separate parts for the stopper, it is possible to temporarily fasten the stopper to the vibration isolator while suppressing an increase in the number of parts and work man-hours.

The vibration isolator according to the second aspect is the vibration isolator according to the first aspect, wherein the elastic body is formed along the outer peripheral surface of the inner cylinder and one end portion of the inner cylinder in the axial direction. And an extension portion extending to the other end portion side, and the radial thickness of the elastic body in the extension portion is such that the side of the one end portion in the axial direction of the inner cylinder is the side of the other end portion. It is formed thicker than.

According to the vibration isolator according to the second aspect, the elastic body is formed along the outer peripheral surface of the inner cylinder and extends to the side of one end and the other end in the axial direction of the inner cylinder. It has. Further, the radial thickness of the elastic body in the extending portion is formed so that one end side in the axial direction of the inner cylinder is thicker than the other end side. Therefore, the stopper press-fitted into the elastic body is more strongly pressed against the elastic body on the one end side in the axial direction of the inner cylinder. As a result, the stopper is less likely to come off from the elastic body, so that the stopper can be stably and temporarily fixed to the vibration isolator.

The anti-vibration device according to the third aspect is the anti-vibration device according to the second aspect, wherein a plurality of the protrusions are formed along the circumferential direction of the flat portion and the flat portion is formed toward the side of the inner cylinder. It extends outward in the radial direction of the part.

According to the vibration isolator according to the third aspect, a plurality of protrusions are formed along the circumferential direction of the flat portion and extend outward in the radial direction of the flat portion toward the inner cylinder side. .. Therefore, the stopper can be easily press-fitted into the elastic body as compared with the case where the protrusion is formed along the axial direction of the inner cylinder.

The vibration isolator according to the fourth aspect is the vibration isolator according to the second or third aspect, and the extension portion is the radial thickness of the elastic body at the portion where the protrusion is press-fitted. Is provided with an fitting portion in which a recess is formed toward the inner cylinder side by making the elastic body thinner than other portions in the circumferential direction.

According to the vibration isolator according to the fourth aspect, the extension portion is fitted in which a recess is formed by making the thickness of the elastic body in the radial direction thinner than that of other portions at the portion where the protrusion is press-fitted. It has a part. Therefore, the stopper whose protrusion from the elastic body is restricted by the extending portion is restricted from being displaced along the circumferential direction of the elastic body. As a result, the stopper can be stably and temporarily fixed to the vibration isolator.

As described above, the anti-vibration device according to the present invention has an excellent effect that the stopper can be temporarily fastened while suppressing an increase in the number of parts and man-hours.

It is a perspective view of the vibration isolation device which concerns on this embodiment. It is sectional drawing of the vibration isolation device along the 2-2 cross-sectional line of FIG. It is a bottom perspective view of the anti-vibration rubber which concerns on this embodiment. It is a perspective view of the stopper which concerns on this embodiment. It is sectional drawing of the vibration isolation device along the 5-5 cross-sectional line of FIG.

(Embodiment)
Hereinafter, the vibration isolator 12 applied to the vehicle vibration isolator 10 will be described as an example of the present invention with reference to FIGS. 1 to 5.

Here, the arrow DA in the figure indicates the device axial direction of the vibration isolator 12, the arrow DR indicates the device radial direction of the vibration isolator 12, and the arrow DC indicates the device circumferential direction of the vibration isolator 12.

Here, the anti-vibration device 12 is arranged in the vehicle so that the device axial direction DA is substantially the same as the vertical direction of the vehicle (not shown), and the device radial direction DR is the vehicle front-rear direction or the vehicle (not shown). The vehicle is arranged so as to be substantially the same as the vehicle horizontal direction including the width direction.

Generally, when a vehicle is running, vibrations are generated due to the rotation of the main engine such as an engine and a motor and the unevenness on the road surface. Therefore, in order to prevent these vibrations from being transmitted to the vehicle body, a vibration isolator 12 provided with an elastic body is provided in the vehicle.

FIG. 1 shows a vibration isolator 12 in which a metal bracket 14 for attaching to a vehicle body (not shown) and a main body 16 are integrally formed. The main body 16 of the anti-vibration device 12 is arranged in a metal outer cylinder 18 integrally formed with the bracket 14 in a substantially cylindrical shape and an inner portion (central portion) in the device radial direction of the main body 16 and is substantially cylindrical. It is configured to include a metal inner cylinder 20 formed in a cylindrical shape. Further, the anti-vibration device 12 is configured to include an anti-vibration rubber 22 as an elastic body interposed between the inner surface of the outer cylinder 18 and the outer surface of the inner cylinder 20.

As shown in FIG. 2, in the anti-vibration device 12, for example, the bracket 14 is fixed to a main engine (not shown) such as an engine or a motor, and is arranged on the lower end side (lower side of the vehicle) of the main body portion 16. Bolts 32 are fastened to members constituting the vehicle body such as suspension members (not shown).

On the upper end side of the main body 16, the overall shape is formed in a substantially disk shape in a plan view, and a mounting hole 24A is provided in the central portion in the radial direction to regulate the displacement of the inner cylinder 20 with respect to the outer cylinder 18. Is placed. Further, on the lower end side of the main body 16 which is the side of one end in the axial direction of the inner cylinder 20, a stopper 30 which is formed in a substantially disk shape as a whole and has a mounting hole 30A in the center in the radial direction is provided. It is installed (press-fitted).

The suspension member is arranged on the lower side of the device of the stopper 30, and the bolt 32 is inserted from the upper plate 24 side into the upper plate 24, the inner cylinder 20, and the mounting holes 24A, 20A, 30A of the stopper 30 along the device axial direction. It is bolted to the main body 16 via the above. As a result, the vibration generated in the main engine is absorbed (attenuated) by the main body 16 and is not transmitted to the vehicle body.

The bracket 14 is formed smaller than the overall shape of the main engine because it needs to be fixed so as not to hinder the operation of the main engine. Therefore, the bolt fastening portions 26 at a plurality of locations (here, four locations) formed on the bracket 14 are adjacent to each other.

The bolt fastening portion 26 is formed with mounting holes 26A for inserting bolts (not shown). Further, the bolt fastening portion 26 is formed with a recessed portion 26B so that the head portion of the bolt to be inserted into the mounting hole 26A can be arranged. The recessed portion 26B has one side portion along the circumferential direction of the mounting hole 26A open to the outside of the bracket 14 so that a tool (not shown) can be arranged when fastening the bolt.

As can be seen from FIG. 2, the stopper 30 attached to the main body 16 overlaps the recessed portion 26B of the bolt fastening portion 26 when viewed along the axial direction of the mounting hole 26A of the bolt fastening portion 26. .. Therefore, when assembling the bracket 14 to the main engine, the bracket 14 is bolted to the main engine without the stopper 30 being attached to the main body 16.

The anti-vibration rubber 22 interposed between the outer cylinder 18 and the inner cylinder 20 is formed along the outer peripheral surface of the inner cylinder 20 and extends to the upper end side and the lower end side of the inner cylinder 20, respectively. The extended portion 40 is formed. The extension portion 40 is formed so that the thickness of the vibration isolator 22 on the lower end side in the radial direction (diameter direction of the main body portion 16) is thicker than that on the upper end side. As an example, the extending portion 40 may be thickly formed so that the in-plane direction of the outer surface in the radial direction of the device on the lower end side is inclined by about 1 to 3 degrees with respect to the radial direction of the device. Further, an outer extending portion 41 extending along the axial direction of the inner cylinder 20 is formed on the outer portion of the extending portion 40 in the radial direction of the device. The outer extending portion 41 extends below the device from the extending portion 40.

As shown in FIG. 3, the extending portion 40 is formed with fitting portions 42 at a plurality of locations (here, four locations) along the peripheral direction of the device. When the stopper 30 is attached to the main body 16, the fitting portion 42 does not overlap with the outer extending portion 41 along the device radial direction so that the outer extending portion 41 can press the stopper 30. It is formed. A recess is formed in the fitting portion 42 by making the thickness of the anti-vibration rubber 22 in the device radial direction thinner than that of other portions in the circumferential direction of the anti-vibration rubber 22. When the stopper 30 is press-fitted into the anti-vibration rubber 22, a cut-out portion 36 as a protrusion described later of the stopper 30 is fitted into the fitting portion 42. Therefore, the cut-out portion 36 fitted in the fitting portion 42 suppresses the displacement of the extending portion 40 along the circumferential direction, so that the stopper 30 can be stably press-fitted into the vibration-proof rubber 22.

FIG. 4 shows a perspective view seen from the side attached to the main body 16 of the stopper 30. The stopper 30 includes a flat portion 34 whose overall shape is formed in a substantially disk shape. A facing surface 30B facing the lower end surface of the inner cylinder 20 along the outer peripheral portion of the mounting hole 30A is formed inside the flat portion 34 in the radial direction. The facing surface 30B is formed in a flat shape so as to come into contact with the anti-vibration 22 rubber when bolted to the main body 16 via the bolt 32. Therefore, as shown in FIG. 5, the displacement of the inner cylinder 20 with respect to the outer cylinder 18 can be regulated by the stopper 30 and the upper plate 24, and the vibration-proof rubber 22 can appropriately absorb the vibration.

As shown in FIG. 4, the portion of the flat portion 34 along the device radial direction is cut and raised on the outer side of the facing surface 30B in the radial direction toward the side facing the main body 16 (upper side of the device). A raised portion 36 is formed. The cut-up portions 36 are formed at a plurality of locations along the circumferential direction of the device (here, four locations). The cut-out portions 36 formed at a plurality of locations are formed at even-numbered locations so as to face each other along the radial direction of the device. By press-fitting (fitting) the cut-out portion 36 formed in this way into the fitting portion 42 of the anti-vibration rubber 22, the stopper 30 press-fitted into the main body portion 16 can be stabilized.

The cut-out portion 36 is formed so that the dimension D1 in the peripheral direction of the device, which is the width thereof, is larger than the dimension D2 (thickness of the flat portion 34 cut up) in the radial direction of the device, which is the thickness. Therefore, the contact area between the cut-out portion 36 and the fitting portion 42 when the stopper 30 is press-fitted into the main body portion 16 can be increased. Further, the inner side surface 36A in the device radial direction of the cut-out portion 36 that comes into contact with the fitting portion 42 when the stopper 30 is press-fitted into the main body portion 16 is curved so as to be concave toward the inside in the device radial direction. .. Specifically, the extending portion 40 and the fitting portion 42 are curved with substantially the same curvature as the curvature of the outer peripheral shape along the peripheral direction of the device. Therefore, it is possible to secure a contact area with the fitting portion 42 of the inner side surface 36A in which the stopper 30 is press-fitted into the main body portion 16 and stabilize the stopper 30 press-fitted into the main body portion 16.

The cut-up portion 36 is formed so as to extend toward the outside in the device radial direction (diameter direction of the flat portion 34) toward the main body portion 16 side. Therefore, the press-fitting of the stopper 30 into the anti-vibration rubber 22 can be facilitated as compared with the case where the cut-up portion 36 extends along the device axial direction (the normal direction of the flat portion 34). .. As an example, the extending direction of the cut-out portion 36 toward the outside in the device radial direction may be formed so as to be inclined by about 1 to 3 degrees with respect to the device axial direction (normal direction of the flat portion 34). ..

(How to assemble the anti-vibration device to the vehicle body)
A method of assembling the vibration isolator 12 to the vehicle body will be described with reference to FIG. The anti-vibration device 12 is fixed to the main engine with the stopper 30 and the upper plate 24 first removed. Specifically, the bracket 14 of the vibration isolator 12 is brought into contact with the main engine, and bolts are formed in the mounting holes 26A of the bolt fastening portion 26 and the holes (not shown) formed so as to communicate with the mounting holes 26A in the main engine. The anti-vibration device 12 and the main engine are fastened by inserting the anti-vibration device 12.

Next, the upper plate 24 is placed on the upper end side of the main body 16 of the vibration isolator 12 bolted to the main engine, and the stopper 30 is press-fitted into the vibration isolator 22 from the lower end side of the main body 16. Finally, the suspension member is arranged on the lower side of the device of the stopper 30, and the bolt 32 is inserted from the mounting hole 24A of the upper plate 24 into the mounting holes 20A and 30A of the inner cylinder 20, the stopper 30 and the mounting hole of the suspension member. The vibration isolator 12 and the suspension member are fastened by screwing a nut into the lower end of the inserted bolt 32.

(Action, effect)
Next, the operation and effect of the anti-vibration device 12 according to the present embodiment will be described.

According to the vibration isolator 12 according to the present embodiment, the upper plate 24 is arranged on the upper end side of the main body 16 bolted to the suspension member (vehicle body), and the stopper 30 is arranged on the lower end side of the main body 16. It is (press-fitted). The stopper 30 includes a flat portion 34 whose overall shape is formed in a substantially disk shape, and also includes a facing surface 30B facing the inner cylinder 20 inside the flat portion 34 in the radial direction. Therefore, in the vibration isolator 12, the displacement of the inner cylinder 20 with respect to the outer cylinder 18 can be regulated by the upper plate 24 and the stopper 30. Further, on the radial outer side of the facing surface 30B of the flat portion 34, a raised portion 36 cut up toward the side facing the inner cylinder 20 (upper side of the device) is formed. Therefore, the stopper 30 can be press-fitted into the anti-vibration rubber 22 on the radial outer side of the inner cylinder 20 without providing a separate component on the stopper 30. As a result, it is not necessary to vulcanize the anti-vibration rubber 22 on the stopper 30, and it is not necessary to weld the stopper 30 to the inner cylinder 20 or the outer cylinder 18, so that the increase in the number of parts and the work man-hours is suppressed and the anti-vibration is suppressed. The stopper 30 can be temporarily fastened to the device 12. Further, when bolting the bracket 14 to the main engine, the stopper 30 can be easily removed from the main body 16 in order to avoid overlapping with the recessed portion 26B of the bolt fastening portion 26.

Further, according to the anti-vibration device 12 according to the present embodiment, the anti-vibration rubber 22 is formed along the outer peripheral surface of the inner cylinder 20 and extends to the upper end side and the lower end side of the inner cylinder 20, respectively. It has a protrusion 40. The extension portion 40 is formed so that the thickness of the anti-vibration rubber 22 on the lower end side in the radial direction (diameter direction of the main body portion 16) is thicker than that on the upper end side. Therefore, the stopper 30 press-fitted to the lower end side of the extending portion 40 is pressed against the anti-vibration rubber 22 more strongly. As a result, the stopper 30 is less likely to come off from the anti-vibration rubber 22, so that the stopper 30 can be stably and temporarily fixed to the anti-vibration device 12.

Further, according to the anti-vibration device 12 according to the present embodiment, the extension portion 40 extends downward from the extension portion 40 along the axial direction of the inner cylinder 20 on the outer portion in the device radial direction of the extension portion 40. The outer extending portion 41 is formed. Further, at least a part of the outer extending portion 41 is aligned with the fitting portion 42 in the radial direction of the device so that the outer extending portion 41 and the flat portion 34 can face each other when the stopper 30 is attached to the main body portion 16. It is formed so that it does not overlap. Therefore, the outer extending portion 41 can stably press the flat portion 34 of the stopper 30, and the desired performance as the vibration isolator 12 can be ensured. In the following description, it is assumed that the outer extending portion 41 is formed so that at least a part of the fitting portion 42 does not overlap with the fitting portion 42 in the radial direction of the device, but the present invention is not limited to this, and the outer extending portion 41 is completely heavy. It may be formed so as not to become.

Further, according to the anti-vibration device 12 according to the present embodiment, the extension portion 40 has a portion in which the incision portion 36 is press-fitted so that the thickness of the anti-vibration rubber 22 in the radial direction is made thinner than other portions. It is provided with an fitting portion 42 in which a recess is formed. Therefore, the stopper 30 whose protrusion from the anti-vibration rubber 22 is restricted by the extending portion 40 is restricted from being displaced along the circumferential direction of the anti-vibration rubber 22. As a result, the stopper 30 can be stably and temporarily fixed to the vibration isolator 12.

Further, according to the vibration isolator 12 according to the present embodiment, the portion of the flat portion 34 along the device radial direction is directed to the side facing the main body 16 on the radial side of the facing surface 30B of the stopper 30. The cut-up portion 36 is formed by cutting up. Further, the cut-up portions 36 are formed at a plurality of locations along the peripheral direction of the device so as to face each other along the radial direction of the device. Therefore, it is possible to prevent the stopper 30 press-fitted into the main body 16 from coming off, and to stably attach the stopper 30.

Further, according to the vibration isolator 12 according to the present embodiment, the cut-out portion 36 is formed so as to extend outward in the radial direction of the flat portion 34 toward the main body portion 16 side. Therefore, the press-fitting of the stopper 30 into the anti-vibration rubber 22 can be facilitated as compared with the case where the cut-up portion 36 extends along the device axial direction.

As described above, the anti-vibration device 12 according to the present embodiment can temporarily fasten the stopper 30 to the anti-vibration device 12 after suppressing an increase in the number of parts and man-hours.

[Other Embodiments]
Although one embodiment of the present invention has been described above, the present invention is not limited to the above, and it goes without saying that the present invention can be variously modified and implemented within a range not deviating from the gist thereof. Is.

Although the vehicle vibration isolation device 12 has been described as an application example of the present invention, the present invention is not limited to this, and the present invention may be applied to a vibration isolation device provided other than the vehicle.

Further, although it has been described here that the upper plate 24 is only mounted on the main body 16, the upper plate is not limited to this, and the upper plate may be a member having the same configuration as the stopper 30.

Further, although the cut-out portion 36 has been described as an example of the protruding portion, the present invention is not limited to this, and for example, the protruding portion may be provided by being integrally molded with the flat portion by casting, injection molding, or the like. Further, for example, the protrusion may be provided by assembling another part to the flat portion.

Further, the cut-out portion 36 has been described as a form in which the flat portion 34 is simply cut up and raised, but the present invention is not limited to this. The stability of the stopper press-fitted into the anti-vibration rubber may be improved by increasing the friction with the fitting portion at the time of press-fitting.

12 ... Anti-vibration device, 18 ... Outer cylinder, 20 ... Inner cylinder, 22 ... Anti-vibration rubber (elastic body), 30 ... Stopper, 30B ... Facing surface, 34 ... Flat part, 36 ... Incision part (protrusion part), 40 ... Extension part, 42 ... Fitting part

Claims (4)

With the outer cylinder
Inner cylinder and
An elastic body interposed between the outer cylinder and the inner cylinder,
A flat portion attached to one end in the axial direction of the inner cylinder and having an overall shape formed in a substantially disk shape is provided, and a facing surface facing the inner cylinder is provided inside the flat portion in the radial direction. With a stopper
A protrusion provided in the flat portion on the radial outer side of the facing surface toward the side facing the inner cylinder and press-fitted into the elastic body on the radial outer side of the inner cylinder.
Anti-vibration device configured to include. The elastic body includes an extending portion formed along the outer peripheral surface of the inner cylinder and extending to the one end portion and the other end portion in the axial direction of the inner cylinder, and the extending portion includes the extending portion. The vibration isolator according to claim 1, wherein the elastic body is formed so that the one end side in the axial direction of the inner cylinder is thicker than the other end side. The anti-vibration device according to claim 2, wherein a plurality of the protrusions are formed along the circumferential direction of the flat portion and extend outward in the radial direction of the flat portion toward the side of the inner cylinder. .. The extending portion is a recess toward the inner cylinder side by making the thickness of the elastic body in the radial direction thinner than other portions in the circumferential direction of the elastic body at the portion where the protrusion is press-fitted. The anti-vibration device according to claim 2 or 3, further comprising an fitting portion in which the is formed.

Images