JP2014142009A - Manufacturing method of link member for vibration-proof device and link member for vibration-proof device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the weight and material cost of a link member, shorten the processing time of a receiving part for receiving a second vibration-proof member, and reduce the processing cost thereof.SOLUTION: An intermediate product 2a including a cylindrical part 20, a pair of leg parts 21, 21, and a bridge part 26 bridged between the opposite surfaces of both the leg parts 21, 21 and continuously formed over the whole area in the cylindrical axial direction thereof is manufactured by extrusion molding. By processing the bridge part 26, a receiving part 22 projecting to the opposite surfaces of both the leg parts 21, 21 inwardly in the opposite direction thereof and receiving a second vibration-proof member 4 is formed.

Description

  The present invention includes a cylindrical portion in which a first vibration isolating member is disposed, and a second vibration isolating member that extends from the cylindrical portion to one side and is opposed to each other with a space therebetween. The present invention relates to a method of manufacturing a vibration isolator link member including a pair of leg portions and a vibration isolator link member manufactured by the manufacturing method.

  A link member having a tubular portion and a pair of legs that extend from the tubular portion to one side and face each other with a space therebetween, a first vibration isolation member disposed in the tubular portion, and both leg portions An anti-vibration device including a second anti-vibration member disposed between the two is known as a prior art.

  For example, Patent Document 1 includes a first vibration isolation mechanism and a second vibration isolation mechanism. The first vibration isolation mechanism includes a first cylindrical portion (tubular portion) and a first connection bracket (leg portion). And a first vibration isolation bush (first vibration isolation member), and the second vibration isolation mechanism includes a second cylindrical portion, a second connection bracket, and a second vibration isolation bush (second vibration isolation member). A first positioning portion for positioning the first connecting bracket with respect to the first cylindrical portion is formed in the first cylindrical portion, and a second positioning portion for positioning the second connecting bracket with respect to the second cylindrical portion is provided. It is formed in the second cylindrical part. As a result, it is possible to reduce variations in the strength of the first cylindrical portion and the second cylindrical portion for each product, and reduce the labor of the operator when the bracket is welded and fixed to the first cylindrical portion and the second cylindrical portion. Cost can be reduced.

JP 2006-194370 A

  By the way, in order to improve the assembling property when assembling the second vibration isolating member to the link member in the one obtained by extruding the link member (for example, an extruded product made of aluminum), as shown in FIG. It is conceivable to make both the leg portions a, a thick and to cut the receiving recesses c that receive the second vibration-proof members b on the opposing surfaces of the leg portions a.

  However, in the thing of FIG. 9, since the leg part a is thick, it is unpreferable at the point of the weight of a link member, or material cost. Further, since the receiving recess b is a depression, only the small-diameter blade d having a small cutting area can be used for cutting the receiving recess b, which is not desirable in terms of processing time and processing cost.

  The present invention has been made in view of such a point, and the problem is that the weight and material cost of the link member are reduced, and the processing time of the receiving portion that receives the second vibration isolating member is shortened, and The processing cost is to be reduced.

  In order to solve the above-mentioned problems, the present invention is characterized in that a receiving portion that protrudes inward in the facing direction is formed on at least one of the facing surfaces of both leg portions.

  Specifically, the present invention includes a cylindrical portion in which a first vibration isolating member is disposed, and a second anti-vibration portion extending from the cylindrical portion to one side and facing each other with a space therebetween. The following solution was taken for the manufacturing method of the link member for vibration isolator provided with a pair of leg part by which a vibration member is arrange | positioned.

  That is, the first invention includes the cylindrical portion, the pair of leg portions, and a continuous portion formed to be continuous over at least one of the opposing surfaces of the both leg portions over the entire region in the cylindrical axis direction. Extruding the intermediate product and processing the continuous portion to form a receiving portion that protrudes inward in the facing direction and receives the second vibration isolating member on at least one of the facing surfaces of the both leg portions. It is a feature.

  According to this, since the receiving portion is a protrusion protruding inward in the opposing direction from at least one of the opposing surfaces of both leg portions, the leg portion can be made thin and formed on at least one of the opposing surfaces of both leg portions. A large-diameter blade can be used to form such a receiving portion by processing the continuous portion. For this reason, while reducing the weight and material cost of a link member, the processing time of a receiving part can be shortened and the processing cost can be reduced.

  According to a second aspect, in the first aspect, the continuous portion is a erection portion that is spanned between opposing surfaces of the both leg portions.

  By the way, after extruding an intermediate product, both legs may be deformed during cooling and the distance between them may vary. This is more conspicuous as the leg length is longer.

  According to the second aspect of the present invention, since the intermediate product includes the erection portion that is spanned between the opposing surfaces of both legs, the distance between the legs varies when the intermediate product is cooled. Can be suppressed by the installation portion.

  3rd invention is the link member for vibration isolator manufactured by the manufacturing method of the said 1st or 2nd invention.

  According to the present invention, since the receiving part is a protrusion protruding inward in the opposing direction from at least one of the opposing surfaces of the both leg parts, the leg part can be made thin, and such a receiving part can be formed. Since a cutter with a large diameter can be used, the weight and material cost of the link member can be reduced, the processing time of the receiving portion can be shortened, and the processing cost can be reduced.

It is a top view which shows the vibration isolator which concerns on embodiment 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 figure which shows the process of extruding the intermediate product of a link metal fitting, (a) is the top view, (b) is the perspective view. It is a figure which shows the process of forming a protrusion part by cutting a construction part, (a) is the top view, (b) is the perspective view. It is a figure which shows the process of forming a receiving part by cutting a protrusion part, (a) is the top view, (b) is the perspective view. It is a figure which shows the process of integrally vulcanizing the 1st elastic member to the 1st inner cylinder and the cylindrical part of a link metal fitting, (a) is the top view, (b) is the perspective view. It is a top view for demonstrating a subject.

  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.

  1 and 2 show a vibration isolator 1 according to an embodiment of the present invention. The vibration isolator 1 connects a lower end portion of a 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 link fitting 2 (link member) having a tubular portion 20 and a pair of leg portions 21 and 21, and is disposed in the tubular portion 20. 1st inner cylinder 31 connected via the 1st elastic member 30, and the 2nd anti-vibration member 4 arrange | positioned between both the leg parts 21 and 21 and attached to a power plant is provided. The first elastic member 30 and the first inner cylinder 31 constitute a first vibration isolation member.

  The link metal fitting 2 is made of an extruded product made of aluminum, and is arranged so that the longitudinal direction thereof coincides with the vehicle longitudinal direction.

  The tubular portion 20 is formed at one end of the link fitting 2 in the longitudinal direction. The cylindrical portion 20 is formed in a cylindrical shape whose outer shape is generally hexagonal when viewed from the cylindrical axis direction. First and second stopper portions 30c and 30d, which will be described later, project inward in the vehicle front-rear direction and are formed on the end surfaces on 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 extend from both ends of the cylindrical portion 20 in a direction orthogonal to the main load input direction (vehicle front-rear direction) to one side (vehicle front side) in the main load input direction and are spaced from each other. They are facing each other. Each leg 21 extends from the tubular portion 20 toward one side (front side of the vehicle) in the main load input direction so as to incline inward in a direction orthogonal to the main load input direction (vehicle front-rear direction). And a parallel portion 21b extending from one end portion in the main load input direction of the inclined portion 21a toward one side in 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.

  An end portion (lower end portion) on one side of the cylinder axis direction on the opposing surface (the inner surface in the direction orthogonal to the main load input direction) of the parallel portions 21b and 21b is the inner side (main load input) in the opposite direction. A receiving portion (leading portion) 22 that protrudes inward in a direction orthogonal to the direction and receives the second inner cylindrical body 40 of the second vibration isolation member 4 is integrally formed. The receiving portion 22 includes first and second receiving portions 22a and 22b that are arranged on each parallel portion 21b with a space therebetween in the main load input direction. The first receiving portions 22a and 22a of the parallel portions 21b and 21b are arranged to face each other in a direction orthogonal to the main load input direction. The second receiving portions 22b and 22b of both the parallel portions 21b and 21b are also opposed to each other in a direction orthogonal to the main load input direction. A surface (upper end surface) of each receiving portion 22a, 22b on the second inner cylinder 40 side is formed in an arcuate surface shape so as to match the shape of the second inner cylinder 40. Each receiving part 22a, 22b is shape | molded by processing the construction part (bridge part) 26 mentioned later. The four receiving portions 22a and 22b receive and hold the second inner cylinder body 40 of the second vibration isolating member 4 at a predetermined position when the second vibration isolating member 4 is assembled to the link metal fitting 2, and its assembling property. It has a function to improve.

  A boss portion 23 is formed on the outer surface of one parallel portion 21b in a direction orthogonal to the main load input direction (vehicle longitudinal direction). Bolt holes 24 are formed in the boss portion 23. Bolt holes 24 are also formed in the other parallel portion 21b. Bolt holes 24 and 24 of both parallel parts 21b and 21b are arranged to face each other in a direction perpendicular to the main load input direction. Bolts 5 inserted into the cylindrical holes of the second inner cylindrical body 40 of the second vibration isolation member 4 are screwed into the bolt holes 24 and 24.

  Reinforcing portions 25 are coupled between the end portion on the one side (vehicle front side) in the main load input direction of the cylindrical portion 20 and the connecting portion of each leg portion 21 between the inclined portion 21a and the parallel portion 21b. ing. Each reinforcing portion 25 extends so as to be inclined outward in a direction orthogonal to the main load input direction (vehicle front-rear direction) as it goes from the tubular portion 20 to one side (vehicle front side) in the main load input direction.

  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 sub frame by a bolt (not shown) inserted through the cylinder hole, and thereby the cylindrical portion 20 side of the vibration isolator 1 is connected to the sub frame.

  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 elastic arm 30a has a main load input direction with respect to a direction orthogonal to the main load input direction (vehicle longitudinal direction) from the outer peripheral surface of the first inner cylinder 31 toward the radially outer side. It extends so as to incline to the other side (rear side of the vehicle) 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 fitting 2 on the injection mold (not shown), the first inner cylinder 31 is set inside the tubular portion 20 of the link fitting 2, and after clamping the mold, The link fitting 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 42.

  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 coaxially disposed in the second outer cylinder 42 and is connected to the inner peripheral surface of the second outer cylinder 42 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 42 is also integrally formed with the second inner cylinder 40 and the second outer cylinder 42 by vulcanization joining.

  The second inner cylindrical body 40 is connected between the parallel portions 21b, 21b of both the leg portions 21, 21 of the link metal fitting 2 by a bolt 5 inserted through the cylindrical 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.

  Hereinafter, the manufacturing method of the vibration isolator 1 will be described with reference to FIGS.

  First, as shown in FIG. 5, a ductile solid or semi-solid of aluminum is forcibly passed through a die outlet having an appropriate shape, and the cylindrical portion 20, the pair of leg portions 21, 21 and the pair of pairs. Between the 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 (inner surfaces in the direction orthogonal to the main load input direction) A continuous intermediate product 2a of the link metal fitting 2 including an erection part 26 (continuous part) formed so as to be continuous over the entire region in the cylinder axis direction is extruded.

  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 installation part 26a is disposed at a position corresponding to the first receiving part 22a. The second erection part 26b is disposed at a position corresponding to the second receiving part 22b. 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, after cooling the intermediate product 2a and stabilizing its dimensions, as shown in FIG. 6, the vicinity of both ends in the direction perpendicular to the main load input direction of both the erected portions 26a, 26b is respectively large-diameter. By cutting with a circular rotary cutter (for example, circular saw) 6, 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) are opposed to each other. A ridge portion 27 that protrudes inward in the direction (inward in the direction orthogonal to the main load input direction) and continues over the entire region in the cylinder axis direction is formed.

  The ridge 27 is composed of first and second ridges 27a and 27b that are arranged on each parallel portion 21b with a space therebetween in the main load input direction. The first protrusion 27a is disposed at a position corresponding to the first receiving portion 22a. The 2nd protrusion part 27b is arrange | positioned in the position corresponding to the said 2nd receiving part 22b.

  In the above cutting process, the first and second protrusions 27a and 27b of the one leg 21 are formed at a time by passing the blade 6 once on the one leg 21 side, and the other leg The first and second protrusions 27a and 27b of the other leg portion 21 are formed at a time by passing the blade 6 once through the portion 21 side.

  The bolt holes 24 are formed by a predetermined tool in the boss portion 23 of the parallel portion 21b of the one leg portion 21 and the parallel portion 21b of the other leg portion 21.

  Next, as shown in FIG. 7, the first and second protrusions 27a and 27b of the parallel parts 21b and 21b are respectively connected to large-diameter circular rotary cutters (for example, the second inner cylinder 40). By cutting with a milling cutter 7 having a diameter as large as the outer diameter, the opposing surfaces of both parallel portions 21b and 21b (inner surfaces in the direction perpendicular to the main load input direction) are arranged on the inner side (mainly in the opposite direction). The first and second receiving portions 22a and 22b are formed so as to project inward (in the direction orthogonal to the load input direction) and receive the second inner cylinder 40 of the second vibration isolation member 4.

  In the above-described cutting process, the first and second receiving portions 22a and 22b of the one leg portion 21 are formed at a time by lowering the cutter 7 once to the one leg portion 21 side, and the other leg portion. The first and second receiving portions 22a and 22b of the other leg portion 21 are formed at a time by lowering the blade 7 once to the 21 side. Thus, the manufacture of the link fitting 2 is completed.

  Next, as shown in FIG. 8, the first elastic member 30 is integrally formed on the first inner cylindrical body 31 and the cylindrical portion 20 of the link metal fitting 2 by vulcanization molding. Next, the second inner cylinder 40 of the second vibration isolating member 4 press-fitted into the press-fitting hole 43 a of the bracket 43 is placed on the second inner cylinder 40 side of the first and second receiving portions 22 a and 22 b of the link metal fitting 2. It receives by surface contact with the surface (upper end surface). Thereby, the 2nd vibration isolator 4 is hold | maintained in a predetermined position. As shown in FIGS. 1 and 2, the second inner cylindrical body 40 is connected between the parallel portions 21 b and 21 b of both the leg portions 21 and 21 of the link metal fitting 2 by the bolt 5 inserted through the cylindrical hole. . As described above, since the second vibration isolation member 4 is held at a predetermined position, the assembling property of the second vibration isolation member 4 to the link fitting 2 is improved. Thus, the manufacture of the vibration isolator 1 is completed.

-Effect-
As described above, according to the present embodiment, the receiving portion 22 is a protrusion protruding inward in the opposing direction from the opposing surface of the both leg portions 21, 21, so that the leg portion 21 can be made thin and the both leg portions 21, 21 can be made thin. The large-diameter blades 6 and 7 can be used to form such a receiving portion 22 by processing the erection portion 26 formed between the opposing surfaces 21. For this reason, while reducing the weight and material cost of the link metal fitting 2, the processing time of the receiving part 22 can be shortened, and the processing cost can be reduced.

  Further, since the intermediate product 2a includes the erection part 26 spanned between the opposing surfaces of the both leg portions 21 and 21, the distance between the leg portions 21 and 21 varies when the intermediate product 2a is cooled. Can be suppressed by the installation portion 26.

(Other embodiments)
In the above embodiment, the link member is an aluminum extrusion-molded product. However, the present invention is not limited to this, and for example, a resin extrusion-molded product may be used.

  Moreover, in the said embodiment, although the receiving part 22 was formed in each leg part 21, you may form in one of both the leg parts 21 and 21. FIG.

  Moreover, in the said embodiment, although the receiving part 22 was formed 2 each on the opposing surface of each leg part 21, you may form 1 or 3 or more.

  Moreover, in the said embodiment, although the 2nd inner cylinder 40 was received by the surface contact by the receiving part 22, it is not restricted to this, For example, you may receive by a line contact.

  Moreover, in the said embodiment, although two construction parts were formed, you may form one or three or more.

  Moreover, in the said embodiment, although the installation part 26 was formed as a continuous part, it is not restricted to this, For example, you may form the protrusion part and block which protrude inside the opposing direction of the leg parts 21 and 21. FIG.

  Moreover, in the said embodiment, it is not limited to vulcanization integral molding of a rubber elastic body with respect to the cylindrical part 20 of the link metal fitting 2, For example, it is made to employ | adopt the system of press-fitting a bush type vulcanization molded product. Also good.

  As described above, the vibration isolator link member manufacturing method and the anti-vibration device link member according to the present invention reduce the weight and material cost of the link member, and the receiving portion that receives the second anti-vibration member. The present invention can be applied to applications that need to shorten the processing time and reduce the processing cost.

1 Vibration isolator
2 Link bracket (link member)
2a Intermediate product
20 cylindrical part
21 legs
22 Receiver
26 Construction part (continuous part)
30 1st elastic member (1st anti-vibration member)
31 1st inner cylinder (1st vibration isolator)
4 Second vibration isolation member

Claims (3)

A pair of tubular portions in which the first vibration isolation member is disposed, and a second vibration isolation member disposed between the tubular portions that extend from the tubular portion to one side and are spaced apart from each other. A method of manufacturing a vibration isolator link member comprising a leg portion,
Extruding an intermediate product comprising the cylindrical portion, the pair of leg portions, and a continuous portion formed so as to be continuous over the entire region in the cylindrical axis direction on at least one of the opposing surfaces of the both leg portions,
By processing the continuous portion, a receiving portion that protrudes inward in the opposing direction and receives the second vibration isolating member is formed on at least one of the opposing surfaces of the both leg portions. A manufacturing method of a link member. In the manufacturing method of the link member according to claim 1,
The method of manufacturing a vibration isolator link member, wherein the continuous portion is a erection portion that is spanned between opposing surfaces of the both leg portions.   The link member for vibration isolator manufactured by the manufacturing method of Claim 1 or 2.

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