JP2017150512A - Link member for vibration prevention device and manufacturing method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce material and manufacturing costs in extrusion molding of a link member for a prevention vibration device.SOLUTION: An intermediate article 2a including a cylindrical part 20, a pair of legs 21, 21 and a bridge part 26 bridged between opposite surfaces of the legs 21, 21 is subjected to extrusion molding, the bridge part 26 is machined, and thereby on the opposite surfaces of the leg parts 21, 21, provided are regulation parts 27, 27 projecting inwardly in an opposite direction and configured to regulate movement of a second vibration prevention member 4 toward a main load input direction.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a vibration isolator link member and a method of manufacturing the same.

  Conventionally, as an example of this type of vibration isolator, a link member having a cylindrical portion and a pair of legs extending so as to face each other at one side from the cylindrical portion, and a link member disposed in the cylindrical portion. There is known a vibration isolator including a first vibration isolator member and a second vibration isolator member disposed between both leg portions.

  For example, in Patent Document 1, as shown in FIG. 11, an anti-vibration system includes a first anti-vibration mechanism a and a second anti-vibration mechanism (not shown) using a link member b formed by processing a sheet metal. An apparatus is disclosed. However, since the manufacturing method by sheet metal processing becomes expensive as described above, in recent years, as shown in Patent Document 2, a technique for manufacturing a vibration isolator by extrusion molding has been developed.

JP 2006-194370 A JP 2014-142009 A

  By the way, in the link member formed by extrusion molding as described in Patent Document 2, when the input load to the second vibration isolating member is large, as shown in FIG. When the vibration member c is assembled, it is necessary to fix the second vibration isolation member c by providing the protrusion d on the end surface of the second vibration isolation member c and pressing the projection d against the leg portion of the link member to deform the leg portion.

  However, when extrusion molding is performed with a metal such as aluminum, the thickness of the leg portion of the link member is required from the viewpoint of rigidity. Therefore, even if the protrusion provided on the second vibration isolating member is pressed, the leg portion is deformed. Therefore, there is a possibility that the fixing becomes unstable. Moreover, man-hour cost also arises by giving the process which provides a processus | protrusion to a 2nd vibration isolator.

  This invention is made | formed in view of this point, The place made into the subject is 2nd even if it is a metal with low rigidity, reducing manufacturing cost, when manufacturing the link member for vibration isolator by extrusion molding. It is to be able to fix the vibration isolator securely.

  In order to solve the above-described problem, the present invention does not provide a protrusion on the second vibration isolating member, but the second anti-vibration member on the opposing surfaces of both legs of the link member on the other side to which the second vibration isolating material is fixed. A restricting portion that restricts the movement of the vibration member is formed.

  Specifically, according to the first aspect of the present invention, there is provided a tubular portion in which the first vibration isolating member is disposed, and an outer peripheral portion of the tubular portion so as to be opposed to each other with a space therebetween. A link member for a vibration isolator having a pair of leg portions in which a second vibration isolating member is disposed between the portions, wherein the cylindrical portion and the pair of leg portions are center lines of the cylindrical portion The restriction member for restricting the movement of the second vibration isolating member in the length direction of the leg is integrally formed on at least one of the opposing surfaces of the leg parts with respect to the link member main body formed in the same shape along It is formed.

  With the above configuration, since the restricting portion is provided on the opposing surface of both the leg portions of the vibration isolator link member, the leg of the second anti-vibration member is provided without providing a projection on the end surface of the second anti-vibration member. The movement in the length direction can be restricted, and the cost for forming the protrusion can be reduced. Further, even if the leg portion of the vibration isolator link member is formed of aluminum or the like and the leg portion is not deformed even when the projection on the end face of the second anti-vibration member is pressed, the movement of the second anti-vibration member is stable. Thus, it is possible to obtain an anti-vibration device that is reliably regulated.

  According to a second invention, in the first invention, the restricting portion is formed on any of the opposing surfaces of the both leg portions.

  By setting it as the said structure, the movement to the leg part length direction of a 2nd vibration isolator can be controlled with a more stable form.

  According to a third aspect of the present invention, in any one of the first and second aspects, the restricting portion includes a protrusion protruding from the facing surface.

  According to a fourth aspect of the present invention, in any one of the first and second aspects, the restricting portion includes a concave portion provided in the opposing surface.

  By adopting the structure of these inventions, the restricting portion which is a feature of the first and second inventions can be formed on the opposing surfaces of both leg portions as a specific and desirable structure.

  A fifth aspect of the invention relates to a method for manufacturing a vibration isolator link member. The manufacturing method includes a tubular portion in which a first vibration isolating member is disposed and an outer peripheral portion of the tubular portion spaced apart from each other. A method for manufacturing a vibration isolator link member comprising a pair of legs that extend so as to face each other and have a second anti-vibration member disposed between respective tip portions, A link member intermediate product in which the pair of leg portions and the erection portion spanned between the opposing surfaces of the both leg portions are formed in the same shape along the center line of the cylindrical portion is formed by extrusion molding After that, by removing the installation part from the link member intermediate product, a restricting part for restricting the movement of the second vibration isolating member in the leg extending direction is formed on at least one of the opposing surfaces of the both leg parts. It is characterized by doing.

  According to the method of the present invention, the number of steps for forming protrusions on the end face of the second vibration isolation member can be reduced, and a low-cost vibration isolation link member can be manufactured.

  According to the present invention, when the second vibration isolating member is disposed on the vibration isolator link member, it is not necessary to form a protrusion on the end surface of the second vibration isolating member, and the man-hour cost can be reduced. . In addition, even when the link member for the vibration isolator is a metal having low rigidity such as aluminum and the leg portion does not deform even when the protrusion of the second vibration isolator member is pressed, the movement of the second vibration isolator is stabilized. It is possible to easily obtain a reliably controlled vibration isolator.

It is a top view which shows the vibration isolator provided with the link member which concerns on Embodiment 1 of this invention. It is a perspective view which shows a vibration isolator. It is a perspective view which shows the 2nd vibration isolator member press-fitted in the press-fitting hole of the bracket. It is a disassembled perspective view which shows a 2nd vibration isolator and a bracket. It is a perspective view which shows a link member. It is an enlarged view of the engaging part for the 2nd vibration isolator in a link member. It is a perspective view of the intermediate goods manufactured in the manufacturing method of a link member. It is the figure which carried out the vulcanization molding of the 1st elastic member between the 1st inner cylinder and the cylindrical part of a link member. FIG. 6 is a view corresponding to FIG. FIG. 8 is a diagram corresponding to FIG. It is a perspective view of the vibration isolator manufactured by the conventional sheet metal processing. It is a perspective view which shows the conventional 2nd vibration isolator.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The following description of the preferred embodiments is merely exemplary in nature and is not intended to limit the invention, its application, or its use.

(Embodiment 1)
1 and 2 show a vibration isolator 1 including a vibration isolator link member 2 according to Embodiment 1 of the present invention. The vibration isolator 1 connects a lower end portion of a vehicle power plant (not shown) and a subframe of a vehicle (not shown) located behind the vehicle body of the power plant. For example, when the vehicle suddenly accelerates or decelerates, the power plant tends to shake greatly in the longitudinal direction of the vehicle body like a pendulum. Such shaking in the longitudinal direction of the vehicle body is regulated by the power plant and the subframe being connected via the vibration isolator 1. Thus, the load in the vehicle front-rear direction is mainly input to the vibration isolator 1 according to the present embodiment.

  The vibration isolator 1 includes a tubular member 20 and a link member 2 having a pair of legs 21 and 21, and is disposed in the tubular portion 20, and a first elastic member is disposed on the inner peripheral surface of the tubular portion 20. A first inner cylinder 31 connected via 30 and a second vibration isolation member 4 disposed between both leg portions 21 and 21 and attached to the power plant are provided. The first elastic member 30 and the first inner cylinder 31 constitute a first vibration isolation member in the present invention.

  The link member 2 is made of, for example, an aluminum extrusion-molded product, and is disposed so that the longitudinal direction thereof coincides with the vehicle longitudinal direction.

  The cylindrical portion 20 is formed at one end of the link member 2 in the longitudinal direction (vehicle longitudinal direction). The cylindrical portion 20 is formed in a cylindrical shape whose outer shape is generally hexagonal. First and second stopper portions 30c and 30d projecting inward in the vehicle front-rear direction are formed on end surfaces facing both sides in the vehicle front-rear direction on the inner peripheral surface of the cylindrical portion 20. The first and second stopper portions 30c and 30d are formed of a rubber elastic body.

  The pair of leg portions 21 and 21 are arranged on one side of the main load input direction from both ends in the vertical direction in FIG. 1, which is a direction orthogonal to the main load input direction (vehicle longitudinal direction) in the outer peripheral portion of the tubular portion 20. Each of them extends to the front side of the vehicle and faces each other with a space therebetween. Each leg portion 21 is inclined so as to go to the inner side of the direction orthogonal to the main load input direction, that is, to the opposite leg portion 21 side as it goes from the tubular portion 20 to one side (vehicle front side) in the main load input direction. And a parallel portion 21b extending from one end of the inclined portion 21a toward one side of the main load input direction. The parallel portions 21b and 21b of the both leg portions 21 and 21 are arranged in parallel to each other. The pair of parallel portions 21 b and 21 b function as a fastening portion that fastens and fixes the second vibration isolation member 4.

  With the structure as described above, the vibration isolator link member 2 has the cylindrical portion 20, the pair of leg portions 21, 21, the reinforcing portions 25, 25, and the boss portion 23 in the vertical direction along the center line of the cylindrical portion 20. It has the link member main body 2b which consists of an extrusion molded product formed in the same shape over the whole direction.

  And as shown also in FIG.5 and FIG.6, in the opposing surface (surface inside the direction orthogonal to the main load input direction) of each said parallel part 21b, the edge part (lower end part) of one side of a cylinder centerline direction The restricting portion 27 is integrally formed. The restricting portion 27 includes a pair of projecting portions 22 and 22 projecting on the inner surface in the opposing direction of each parallel portion 21b in a direction perpendicular to the main load input direction and spaced apart from each other in the main load input direction. Thus, the second inner cylinder 40 of the second vibration isolating member 4 is engaged between the protrusions 22 and 22, and the second anti-vibration member 4 is formed in the parallel portion 21b by the restricting portion 27. The movement in the load input direction (leg length direction) is restricted. Each protrusion 22 includes a receiving portion 22a and a restriction wall portion 22b. On the opposing surface of each parallel portion 21b, a notch-like invitation portion 28 for drawing the second inner cylindrical body 40 during assembly is provided above the protrusions 22 and 22.

  The restricting portions 27 (both protrusions 22 and 22) of each parallel portion 21b are arranged so as to face the restricting portions 27 of the parallel portions 21b facing each other in a direction perpendicular to the main load input direction. Each projecting portion 22 constituting each restricting portion 27 is connected to the receiving portion 22a located on the lower side and the upper end portion of the receiving portion 22a, and the opposite side of the upper end portion is opposed to the main load input direction. The upper end surface of the receiving portion 22a other than the portion continuing to the restriction wall portion 22b is restricted to the other side toward the lower side. It is formed in an inclined shape (may be an arcuate surface shape) that is inclined toward the portion 27. On the other hand, the surface (inner side surface) on the other side of the projecting portion 22 of each regulating wall portion 22b forms a vertical surface. Each of the pair of protrusions 22 and 22 is formed by processing an erection part 26 described later. The two restricting portions 27 are configured to connect the second inner cylinder body 40 of the second vibration isolating member 4 to the receiving portions 22a of the protrusions 22 and 22 in the restricting portion 27 when the second vibration isolating member 4 is assembled to the link member 2. , 22a,... Are received by the inclined surface of the upper end portion and held in a predetermined position, and the restriction wall portions 22b, 22b,... Regulate the movement of the second inner cylindrical body 40 in the main load input direction. Yes.

  Of the two parallel portions 21b and 21b, a boss portion 23 having a rectangular cross section is integrally formed on the outer surface of one parallel portion 21b in the entire vertical direction. A bolt insertion hole 24 is formed in each of the two parallel portions 21 b and 21 b so as to penetrate the boss portion 23. The bolt insertion holes 24 and 24 of both parallel parts 21b and 21b penetrate the parallel parts 21b and 21b in a direction orthogonal to the main load input direction. Bolts 5 that are inserted through the cylindrical holes of the second inner cylindrical body 40 of the second vibration isolating member 4 are inserted into both the bolt insertion holes 24, 24.

  Reinforcing portions 25 are connected between the end portion on the one side (vehicle front side) in the main load input direction of the tubular portion 20 and the connecting portions of the inclined portions 21a and the parallel portions 21b of the respective leg portions 21. Yes. Each reinforcement part 25 is extended so that it may incline to the outer side of the direction orthogonal to a main load input direction as it goes to the one side (vehicle front side) of the main load input direction from the cylindrical part 20. As shown in FIG.

  The first inner cylinder 31 is made of a cylindrical metal member whose outer shape is generally hexagonal. The first inner cylinder 31 is disposed at a position slightly offset on the leg 21 side (vehicle front side) from the center position in the main load input direction in the cylindrical portion 20. The first inner cylinder 31 is elastically connected to the inner peripheral surface of the cylindrical portion 20 via the first elastic member 30 as described above. The first inner cylinder 31 is connected to the subframe by a bolt (not shown) inserted into the cylinder hole, and thereby the cylindrical portion 20 side of the vibration isolator 1 is connected to the subframe.

  The first elastic member 30 is made of a rubber elastic body. The first elastic member 30 includes a pair of elastic arm portions 30a and 30a extending radially outward from the first inner cylindrical body 31, and a frame-like portion covering the inner peripheral surface of the cylindrical portion 20 in a thin skin shape over the entire circumference. 30b. The frame-shaped portion 30b is integrally formed with a rubber first stopper portion 30c and a rubber second stopper portion 30d located on the opposite side of the first stopper portion 30c with the first inner cylinder 31 interposed therebetween. Has been.

  The pair of elastic arm portions 30 a and 30 a are arranged so as to form a substantially V shape in a plan view of the vibration isolator 1. More specifically, each of the elastic arm portions 30a extends from the outer peripheral surface of the first inner cylinder 31 to the radially outer side with respect to the direction perpendicular to the main load input direction (the other side of the main load input direction (vehicle It extends so as to incline to the rear side) and is connected to the inner peripheral surface of the cylindrical portion 20. The pair of elastic arm portions 30 a and 30 a function as a main spring portion that absorbs vibration input to the vibration isolator 1.

  The first elastic member 30 is integrally formed with the first inner cylindrical body 31 and the cylindrical portion 20 by vulcanization molding. Specifically, after installing the link member 2 on the injection mold (not shown), the first inner cylinder 31 is set inside the tubular portion 20 of the link member 2, and after clamping, The link member 2 and the first elastic member 30 are integrated by vulcanization adhesion by injecting an unvulcanized rubber elastic body into the cavity of the injection mold and heating and vulcanizing. Thereby, the 1st inner cylinder 31, the 1st elastic member 30, and the cylindrical part 20 are integrated by vulcanization adhesion. By adopting vulcanization integral molding in this way, for example, the degree of freedom of shape of the cylindrical portion 20 can be increased as compared with a case where a bush-type vulcanized molded product is press-fitted into the cylindrical portion 20. Therefore, the shape of the cylindrical portion 20 is not limited to a cylindrical shape, and can be a relatively complicated shape as in this embodiment. Furthermore, the manufacturing cost can be reduced by omitting the outer cylinder which is necessary when the bush press-fitting method is adopted.

  The second vibration isolating member 4 is a bush type vulcanized molded product. That is, as shown in FIGS. 3 and 4, the second vibration isolation member 4 is connected to the second inner cylinder 40 and the outer peripheral surface of the second inner cylinder 40 via the second elastic member 42. A second outer cylinder 41.

  The second inner cylinder 40 is made of a cylindrical metal member. The second inner cylinder 40 is disposed such that its axis is orthogonal to the axis of the first inner cylinder 31. The second inner cylinder 40 is disposed coaxially in the second outer cylinder 41 and is connected to the inner peripheral surface of the second outer cylinder 41 via the second elastic member 42 as described above. . The second elastic member 42 is formed over the entire circumference so as to surround the outer peripheral surface of the second inner cylindrical body 40. Similarly to the first elastic member 30, the second elastic member 42 in the second outer cylinder 41 is also integrally formed with the second inner cylinder 40 and the second outer cylinder 41 by vulcanization joining.

  The second inner cylinder 40 is connected between the parallel parts 21b and 21b of the both leg parts 21 and 21 of the link member 2 by a bolt 5 inserted through the cylinder hole.

  The second vibration isolating member 4 is connected to the lower end of the power plant by a bracket 43 in which the second vibration isolating member 4 is press-fitted into the press-fitting hole 43a, whereby the leg 21 side of the vibration isolator 1 is connected to the power plant. Connected to Thus, the first inner cylinder 31 is connected to the subframe, and the second vibration isolation member 4 is connected to the power plant via the bracket 43, whereby the subframe and the power plant are connected to the vibration isolation device. 1 is connected.

  Next, a method for manufacturing the vibration isolator 1 will be described.

  First, as shown in FIG. 7, the ductile solid or semi-solid of aluminum is forced to pass through a die outlet having a predetermined shape and extruded to form the cylindrical portion 20 and the pair of leg portions 21 and 21. Hung between the pair of reinforcing portions 25, 25, the boss portion 23, and the opposing surfaces of the parallel portions 21b, 21b of both the leg portions 21, 21 (the inner surfaces in the direction perpendicular to the main load input direction). The intermediate product 2a of the link member 2 including the erected portion 26 is formed. In addition, what remove | eliminated the installation parts 26 and 26 from this intermediate product 2a becomes the said link member main body 2b.

  The erection part 26 includes first and second erection parts 26a and 26b that are arranged between the parallel parts 21b and 21b with a space therebetween in the main load input direction. The first erection part 26 a is disposed at a position corresponding to the one protrusion 22, and the second erection part 26 b is disposed at a position corresponding to the other protrusion 22. The two erected parts 26a and 26b have a function of suppressing variation in the distance between the leg parts 21 and 21 when the intermediate product 2a is cooled.

  Then, the bolt insertion hole 24 is formed through the parallel portions 21b, 21b of both the leg portions 21, 21 with a predetermined tool so as to pass through the boss portion 23 of the one leg portion 21.

  Next, as shown in FIG. 5, both the first and second erected portions 26a and 26b of the parallel portions 21b and 21b are cut off, and the remaining portions are cut with a blade to cut both. A pair of protrusions 22 (regulators) on opposite surfaces (inner surfaces in a direction orthogonal to the main load input direction) of the parallel portions 21b and 21b on the inner side in the opposite direction (inner sides in the direction orthogonal to the main load input direction). 27) and 22 are formed. Further, an invitation portion 28 is formed at the upper end of the parallel portion 21 b corresponding to the two protrusions 22 and 22. Thus, the manufacture of the link member 2 is completed.

  Next, as shown in FIG. 8, the said 1st elastic member 30 is integrally molded in the cylindrical part 20 of the 1st inner cylinder 31 and the link member 2 by vulcanization molding. Next, the lengthwise end of the second inner cylinder 40 of the second vibration isolating member 4 that is press-fitted into the press-fitting hole 43 a of the bracket 43 is a receiving portion in the two protrusions 22 and 22 of the restricting portion 27 of the link member 2. 22a and 22a are received by surface contact by the inclined surface (upper end surface) of the upper surface. Thereby, the 2nd vibration isolator 4 is hold | maintained in a predetermined position. That is, the second vibration isolating member 4 is supported by the receiving portions 22a, 22a,... Of the protrusions 22, 22 in the restricting portion 27, and the second anti-vibration member 4 is input to the main load by the restricting wall portions 22b, 22b,. The movement in the direction is restricted.

  After that, as shown in FIGS. 1 and 2, the second inner cylinder body 40 is connected to the parallel portions 21b and 21b of the leg portions 21 and 21 of the link member 2 by the bolts 5 inserted into the cylinder holes. Connect between them. At this time, as described above, the movement of the both ends of the second vibration isolating member 4 in the main load input direction at the parallel portion 21b is restricted by the restricting portions 27, 27. Assembling property to the link member 2 is improved. Thus, the manufacture of the vibration isolator 1 is completed.

  As described above, according to the present embodiment, since the restricting portions 27 and 27 protrude from the facing surfaces of the both leg portions 21 and 21 to the inside in the facing direction, the protrusions are provided on the end surface of the second inner cylindrical body 40. The movement of the second inner cylinder 40 in the main load input direction can be restricted, and the manufacturing cost can be reduced. In addition, even when the link member 2 is extruded using a metal such as aluminum and the leg portion 21 is not deformed even when the projection on the end surface of the second inner cylinder 40 is pressed, the second inner portion is reliably secured by the restricting portions 27 and 27. The movement of the cylindrical body 40 in the main load input direction can be restricted.

(Embodiment 2)
FIG. 9 shows a second embodiment of the present invention. In the following embodiments, the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  In the link member 2 according to the second embodiment, as shown in FIG. 9, the restricting portion 27 is composed of one end groove-like concave portion that is recessed in the opposing surface of each leg portion 21. Specifically, the restricting portion 27 is formed by notching the facing surface of the parallel portion 21b in each leg portion 21 in a concave shape from the upper end surface of the parallel portion 21b to the same height position near the lower end portion. A receiving portion 22e is formed at the (end portion of the recessed portion), and a regulating wall portion 22f is formed on the side surface (the recessed portion side surface) facing the main load input direction. Here, the receiving portion 22e can be formed in an arc shape corresponding to the outer peripheral surface shape of the second inner cylindrical body 40, and the regulation wall portion 22f can be formed to be a vertical surface. In this case, as an intermediate product of the link member 2, for example, a link member having a construction part 26 a as shown in FIG. 10 only at one end of the link member may be used. Other configurations are the same as those of the first embodiment, and the same effects as those of the first embodiment can be obtained in this embodiment.

(Other embodiments)
In the said embodiment, although the link member was made into the extrusion-molded product made from aluminum, you may perform extrusion molding not only with this but with another metal, resin, etc., for example. Moreover, in the said embodiment, although the control part 27 was formed in each leg part 21, you may form in one of both the leg parts 21 and 21. FIG. Even in that case, the same effect can be obtained.

  As described above, the vibration isolator link member manufacturing method and the anti-vibration device link member according to the present invention do not require a protrusion on the end surface of the second anti-vibration member, thereby reducing the manufacturing cost of the link member. Can be reduced.

DESCRIPTION OF SYMBOLS 1 Vibration isolator 2 Link member 2a Intermediate product 20 Cylindrical part 21 Leg part 22 Projection part 26 Construction part 27 Restriction part 30 1st elastic member (1st vibration isolation member)
31 1st inner cylinder (1st vibration isolator)
4 Second vibration isolation member

Claims (5)

A cylindrical portion in which the first vibration isolation member is disposed, and an outer peripheral portion of the cylindrical portion that extend so as to face each other with a space therebetween, and a second vibration isolation member is disposed between the tip portions. A link member for a vibration isolator comprising a pair of legs provided,
With respect to the link member main body in which the cylindrical portion and the pair of leg portions are formed in the same shape along the center line of the cylindrical portion, the second vibration isolation is provided on at least one of the opposing surfaces of the both leg portions. A link member for an anti-vibration device, wherein a restricting portion for restricting movement of the member in the leg length direction is integrally formed. In claim 1,
The anti-vibration device link member, wherein the restricting portion is formed on any of the opposing surfaces of the both leg portions. In any one of Claim 1 or 2,
The anti-vibration device link member, wherein the restricting portion includes a protrusion protruding from the facing surface. In any one of Claim 1 or 2,
The anti-vibration device link member according to claim 1, wherein the restricting portion includes a concave portion provided in the opposing surface. A cylindrical portion in which the first vibration isolation member is disposed, and an outer peripheral portion of the cylindrical portion that extend so as to face each other with a space therebetween, and a second vibration isolation member is disposed between the tip portions. A method of manufacturing a vibration isolator link member comprising a pair of legs provided,
The intermediate member of the link member in which the tubular portion, the pair of leg portions, and the erection portion spanned between the opposing surfaces of the both leg portions are formed in the same shape along the center line of the tubular portion After forming by extrusion molding,
By removing the erection part from the link member intermediate product, a restricting part for restricting movement of the second vibration isolating member in the leg extending direction is formed on at least one of the opposing surfaces of both leg parts. A manufacturing method of a link member for a vibration isolator characterized by the above.

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