JP2009236216A - Torque rod and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a torque rod exhibiting sufficiently high tensile strength and compression strength while reducing the number of components. <P>SOLUTION: A connecting part 30 of the torque rod 1 is provided with a pair of connecting part frame bodies 31 and 32 respectively connecting an outer member 12 of a first mounting bush 10 and an outer member 22 of a second mounting bush 20 and separately arranged from each other, and a connecting part rubber elastic body 33 filled in an opposed space of the pair of the connecting part frame bodies 31 and 32. The outer member 12 of the first mounting bush 10, the outer member 20 of the second mounting bush, and the pair of the connecting part frame bodies 31 and 32 are constituted of an integrally formed ringlike member 50. The ringlike member 50 is formed so that inner peripheral widths W1 and W2 orthogonal to a separating direction of inner members 11 and 21 in a part where the inner members of the first and second mounting bushes 10 and 20 are arranged is larger than an inner peripheral width W3 in the pair of the connecting part frame bodies 31 and 32. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention is a torque rod that is bridged between the engine side and the body side of a vehicle, regulates displacement in the front-rear direction of the engine and roll (rotation around the front-rear direction), and insulates vibration between the engine side and the body side. And a manufacturing method thereof.

In general, the torque rod is connected to the first mounting bush attached to the first member, the second mounting bush attached to the second member, and the first mounting bush and the second mounting bush. It consists of a part. In order to achieve the reduction of the components of the torque rod, there is one described in Japanese Patent Application Laid-Open No. 2008-2615 (Patent Document 1). In this torque rod, the outer members of the first and second mounting bushes and the connecting portion are integrally formed by press-molding a single annular metal plate. And the connection part is joined by spot welding.
JP 2008-2615 A

  However, according to the torque rod of Patent Document 1, since the connecting portion is joined by spot welding, the connecting portion is substantially formed by a single relatively thin metal fitting. Since it is necessary to regulate the vibration of the engine in the longitudinal direction of the vehicle at the connecting portion of the torque rod, a considerable strength is required not only for the tensile load in the longitudinal direction of the vehicle but also for the compressive load. The torque rod has a sufficiently high tensile strength, but it cannot be said that there is no possibility of buckling against a compressive load.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a torque rod having a sufficiently large tensile strength and compressive strength while reducing the number of components and a method for manufacturing the same.

  Hereinafter, each means suitable for solving the above-described problems will be described with additional effects and the like as necessary.

(Means 1) The torque rod according to means 1 is:
A first mounting bush comprising an inner member, an outer member, and a rubber elastic body provided therebetween;
A second mounting bush that is spaced apart from the first mounting bush and includes an inner member, an outer member, and a rubber elastic body provided therebetween;
A connecting portion for connecting the first mounting bush and the second mounting bush;
A torque rod comprising:
The connecting portion connects the outer member of the first mounting bush and the outer member of the second mounting bush, respectively, and a pair of connecting portion frames that are spaced apart from each other, and for the pair of connecting portions A rubber elastic body for the connecting portion that is filled in the opposing space of the frame body,
The outer member of the first mounting bush, the outer member of the second mounting bush, and the pair of connecting portion frame bodies are integrally formed ring-shaped members,
The ring-shaped member has an inner circumferential width perpendicular to the separating direction of the inner members at a portion where the inner members of the first and second mounting bushes are disposed, It is characterized by being formed larger than the circumferential width.

  According to the means 1, since the outer members of the first and second mounting bushes and the connecting portion frame are formed integrally with each other, the number of components is reduced in the same manner as the conventional torque rod. Can be achieved. Furthermore, since the connecting portion has a pair of connecting portion frames constituting a part of the ring-shaped member, the connecting portion has a sufficiently large tensile strength. Further, the pair of connecting portion frames are spaced from each other. Therefore, since it has a two-support structure, it is less likely to buckle than a conventional one-support structure. Thus, the connecting portion of this means has a sufficiently large compressive strength that is difficult to buckle.

  However, since the pair of connecting portion frames are spaced apart from each other, it may be a problem whether the first and second mounting bushes have a sufficient displacement regulating effect when displaced in the direction in which the inner members of the first and second mounting bushes approach. This is solved by the following. First, the ring-shaped member is formed such that the width of the first and second mounting bush portions (inner circumferential width orthogonal to the direction in which both inner members are separated) is larger than the width of the pair of connecting portion frames. Thereby, a pair of frame for connection parts contributes to the displacement control with respect to the direction in which the inner member of the 1st and 2nd attachment bush approaches. Furthermore, since the opposing space of the pair of connecting portion frame bodies constituting the connecting portion is filled with the connecting portion rubber elastic body, the connecting portion rubber elastic body is also provided in the first and second mounting bushes. This contributes to displacement control in the direction in which the inner member approaches.

(Means 2) In the torque rod of means 1, the rubber elastic body of the first mounting bush, the rubber elastic body of the second mounting bush, and the rubber elastic body for the connecting portion are integrally molded. Construct a molded product.
According to the means 2, since all the rubber elastic bodies constituting the torque rod form an integral rubber molded product, the number of components can be further reduced.

(Means 3) In the torque rod of means 2, the integral rubber molded product is bonded to the ring-shaped member by integral vulcanization.
According to the means 3, the integral rubber molded product and the ring-shaped member can be handled as substantially integral parts, which contributes to a substantial reduction in the number of components.

(Means 4) In the torque rod of means 3, only the outer member portion of the ring-shaped member obtained by integrally vulcanizing and bonding the integral rubber molded product is drawn.
Here, the drawing is performed in order to prevent the durability of the rubber elastic body from being lowered due to the shrinkage of the rubber elastic body caused by vulcanizing and bonding the rubber elastic body. As described above, the ring-shaped member has a complicated shape. Therefore, it is not easy to draw all ring-shaped members. However, according to the means 4, the drawing molding target part is only the part of the outer member, so that it becomes easy. Of the integral rubber molded product, the durability of the rubber elastic body constituting the first and second mounting bushes is the most important. Therefore, the durability of the rubber elastic body constituting the first and second mounting bushes can be reliably increased by setting the target part of the draw molding as the part of the outer member.

(Means 5) In the torque rod of means 2, the integral rubber molded product is attached to the ring-shaped member by press fitting.
According to the means 5, the integral rubber molded product and the ring-shaped member are separately molded and integrated by press-fitting in a subsequent process. That is, the integral rubber molded product and the ring-shaped member are not vulcanized and bonded. In general, when vulcanized and bonded, the manufacturing apparatus may be complicated, which may increase the cost. Therefore, according to the present means, since it is integrated by press-fitting without performing vulcanization adhesion, cost reduction can be achieved.

(Means 6) In the torque rod of means 5, a circumferential recess is provided on the outer peripheral surface of the integral rubber molded product, and the ring-shaped member is fitted into the recess.
According to the means 6, the ring-shaped member is configured to be fitted into the concave portion of the integral rubber molded product, thereby strengthening the engagement between them. As a result, it is possible to reliably prevent the two from separating.

(Means 7) In the torque rod of means 1, the connecting portion further includes a connection reinforcing portion for connecting the pair of connecting portion frames.
According to the means 7, the connection reinforcing part contributes to the displacement regulation of the rubber elastic body constituting these when the inner members of the first and second mounting bushes are displaced in the approaching direction.

(Means 8) In the torque rod of the means 7,
The rubber elastic body of the first mounting bush and the one side portion of the connection reinforcement portion of the rubber elastic body for the connection portion constitute a first integrated rubber molded product formed integrally,
The rubber elastic body of the second mounting bush and the other side portion of the connection reinforcing portion of the rubber elastic body for the connection portion constitute a second integrated rubber molded product formed integrally.
Although the connecting portion has the rubber elastic body for the connecting portion, there is a possibility that the number of components increases, but this means can prevent an increase in the number of components.

(Means 9) In the torque rod of means 8, the first integral rubber molded product and the second integral rubber molded product are molded of different materials.
According to the means 9, it becomes easy to exhibit an appropriate anti-vibration performance.

(Means 10) In the torque rod of means 8 or 9, the first integral rubber molded product and the second integral rubber molded product are bonded to the ring-shaped member by integral vulcanization.
According to the means 10, the first and second integral rubber molded articles and the ring-shaped member can be handled as substantially integral parts, which contributes to a substantial reduction in the number of components.

(Means 11) In the torque rod of the means 10, only a portion corresponding to the outer member is drawn from the ring-shaped member obtained by integrally vulcanizing and bonding the first and second integral rubber molded products.
According to the means 11, since the target part of drawing is only the part of the outer member, it becomes easy. Of the integral rubber molded product, the durability of the rubber elastic body constituting the first and second mounting bushes is the most important. Therefore, the durability of the rubber elastic body constituting the first and second mounting bushes can be reliably increased by setting the target part of the draw molding as the part of the outer member.

(Means 12) In the torque rod of means 8, the first and second integral rubber molded articles are attached to the ring-shaped member by press-fitting.
According to the means 12, the integral rubber molded product and the ring-shaped member are separately molded and integrated by press-fitting in a subsequent process. That is, the integral rubber molded product and the ring-shaped member are not vulcanized and bonded. In general, when vulcanized and bonded, the manufacturing apparatus may be complicated, which may increase the cost. Therefore, according to the present means, since it is integrated by press-fitting without performing vulcanization adhesion, cost reduction can be achieved.

(Means 13) In the torque rod of the means 12, a circumferential recess is provided on the outer peripheral surface of the first and second integral rubber molded articles, and the ring-shaped member is fitted into the recess.
According to the means 13, the ring-shaped member is configured to be fitted into the concave portion of the integral rubber molded product, thereby strengthening the engagement between them. As a result, it is possible to reliably prevent the two from separating.

(Means 14) A method of manufacturing a torque rod according to means 14 includes:
A first mounting bush comprising an inner member, an outer member, and a rubber elastic body provided therebetween;
A second mounting bush that is spaced apart from the first mounting bush and includes an inner member, an outer member, and a rubber elastic body provided therebetween;
A connecting portion for connecting the first mounting bush and the second mounting bush;
In a method of manufacturing a torque rod comprising:
The connecting portion connects the outer member of the first mounting bush and the outer member of the second mounting bush, respectively, and a pair of connecting portion frames that are spaced apart from each other, and for the pair of connecting portions A rubber elastic body for the connecting portion that is filled in the opposing space of the frame body,
The outer member of the first mounting bush, the outer member of the second mounting bush, and the pair of connecting portion frames, and the inner members of the first and second mounting bushes are disposed. A ring-shaped member molding step of molding a ring-shaped member in which an inner circumferential width orthogonal to the separating direction of both the inner members in the portion is larger than the inner circumferential width in the pair of connecting portion frames;
A rubber elastic body disposing step of disposing the rubber elastic bodies of the first and second mounting bushes and the rubber elastic body for the connecting portion inside the ring-shaped member formed by the ring-shaped member forming step;
It is characterized by providing.

  According to the torque rod manufacturing method of the means 14, the torque rod of the means 1 can be reliably manufactured. That is, according to this means, the effect by the torque rod of the means 1 mentioned above can be exhibited reliably.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments in which a torque rod of the present invention is embodied will be described with reference to the drawings.

<First embodiment>
The torque rod 1 of 1st embodiment is demonstrated with reference to FIGS. FIG. 1 is a plan view of the torque rod 1. FIG. 2 is a front view of the torque rod 1. FIG. 3 is a cross-sectional view taken along the line AA of FIG. 4 is a cross-sectional view taken along line BB in FIG. FIG. 5 is a perspective view of the ring-shaped member 50.

  As shown in FIG. 1, the torque rod 1 connects the first mounting bush 10, the second mounting bush 20 that is spaced from the first mounting bush 10, and both bushes 10, 20. And a connecting portion 30. The first mounting bush 10 includes, for example, a cylindrical inner member 11 that is mounted on the engine side of the vehicle, an outer member 12 that is spaced apart from the inner member 11, and an inner member 11 and an outer member 12. And a rubber elastic body 13 provided therebetween. The rubber elastic body 13 is formed with two corners 13a and 13b. These slips 13a and 13b are formed on both sides of the inner member 11 in the separating direction of the first mounting bush 10 and the second mounting bush 20 (left and right direction in FIG. 1).

  The second mounting bush 20 includes, for example, a cylindrical inner member 21 that is mounted on the vehicle body side, an outer member 22 that is provided on the inner member 21 so as to be spaced outward, and the inner member 21 and the outer member 22. And a rubber elastic body provided therebetween. The rubber elastic body 23 is formed with two corners 23a and 23b. These curls 23 a and 23 b are formed on both sides of the inner member 21 in the separating direction of the first mounting bush 10 and the second mounting bush 20 (left and right direction in FIG. 1).

  The connecting portion 30 connects the outer member 12 of the first mounting bush 10 and the outer member 22 of the second mounting bush 20, respectively, and a pair of connecting portion frame bodies 31 and 32 that are spaced apart from each other. And the connecting portion rubber elastic body 33 filled in the space facing the connecting portion frame bodies 31 and 32.

  A detailed configuration of the torque rod 1 will be described below. As shown in FIG. 5, the outer member 12 of the first mounting bush 10, the outer member 22 of the second mounting bush 20, and the pair of connecting portion frames 31 and 32 that constitute the torque rod 1 are integrated. The ring-shaped member 50 is formed. The ring-shaped member 50 has a bowl shape penetrating in the axial direction. Specifically, the ring-shaped member 50 is formed by crushing two opposing locations on the outer peripheral surface of the cylindrical pipe inward. Accordingly, the ring-shaped member 50 is orthogonal to the direction in which the inner members 11 and 21 of the first and second mounting bushes 10 and 20 are disposed in the direction in which the inner members 11 and 21 are separated (the left-right direction in FIG. 1). The inner peripheral widths W1 and W2 are formed to be larger than the inner peripheral width W3 of the pair of connecting portion frames 31 and 32.

  Further, the rubber elastic body 13 of the first mounting bush 10, the rubber elastic body 23 of the second mounting bush 20, and the rubber elastic body 33 for the connecting portion of the connecting portion 30 constituting the torque rod 1 are integrally formed. The integrated rubber molded product 60 is configured.

  Here, in the torque rod 1 of the present embodiment, the integral rubber molded product 60 is vulcanized and bonded to the inner members 11 and 21 and the ring-shaped member 50.

  A method for manufacturing the torque rod 1 configured as described above will be described. First, the ring-shaped member 50 and the inner members 11 and 21 constituting the first and second mounting bushes 10 and 20 are molded (ring-shaped member molding step). These are formed of a metal such as iron or aluminum or a highly rigid member such as a resin.

  Subsequently, the ring-shaped member 50 and the inner members 11, 21 and the middle mold for molding the straightenings 13a, 13b, 23a, 23b are positioned on a vulcanization mold (not shown). Subsequently, rubber is injection molded inside the vulcanization mold. Thereby, at the same time as the integral rubber molded product 60 is formed, the ring-shaped member 50 and the inner members 11 and 21 and the integral rubber molded product 60 are integrally vulcanized and bonded (rubber elastic body arranging step).

  Subsequently, only the portions of the outer members 12 and 22 of the ring-shaped member 50 to which the integral rubber molded product 60 is integrally vulcanized and bonded are drawn. That is, the rubber elastic body 13 constituting the first mounting bush 10 and the rubber elastic body 23 constituting the second mounting bush 20 are deformed so as to reduce the size of the outer periphery.

  Here, when the rubber elastic bodies 13 and 23 are vulcanized and bonded, the rubber elastic bodies 13 and 23 contract, so that the rubber elastic bodies 13 and 23 of the mounting bushes 10 and 20 that require particularly high durability are used. Durability decreases. Therefore, the durability of the rubber elastic bodies 13 and 23 can be improved by drawing as described above. However, since the ring-shaped member 50 has a complicated shape of a saddle shape, it is not easy to draw the entire ring-shaped member 50. Therefore, the drawing part is easy because only the parts of the outer members 12 and 22 are used.

  As described above, since the outer members 12 and 22 of the first and second mounting bushes 10 and 20 and the connecting portion frame bodies 31 and 32 are formed of the ring-shaped member 50 formed integrally, the number of components is reduced. be able to. Furthermore, since all the rubber elastic bodies constituting the torque rod 1 constitute the integral rubber molded product 60, the number of components can be further reduced. Furthermore, since the integral rubber molded product 60 and the ring-shaped member 50 are vulcanized and bonded, they can be handled as substantially integral parts, which contributes to a substantial reduction in the number of components.

  Furthermore, since the connection part 30 has a pair of connection part frame bodies 31 and 32 which comprise a part of this ring-shaped member 50, it has a sufficiently large tensile strength. Further, the pair of connecting portion frames 31 and 32 are spaced apart from each other. Therefore, it is difficult to buckle because it has a two-support structure. That is, the connecting portion 30 has a sufficiently large compressive strength that is difficult to buckle without providing a reinforcing member.

  However, since the pair of connecting portion frames 31 and 32 are separated from each other, sufficient displacement is obtained when the inner members 11 and 21 of the first and second mounting bushes 10 and 20 are displaced in the approaching direction. Having a regulatory effect can be a problem. The ring-shaped member 50 is formed such that the widths W1 and W2 of the first and second mounting bushes 10 and 20 are larger than the width W3 of the pair of connecting portion frames 31 and 32. Thereby, a pair of connection part frame bodies 31 and 32 contribute to the displacement control with respect to the direction in which the inner members 11 and 21 of the 1st, 2nd attachment bushes 10 and 20 approach. Further, since the connecting portion rubber elastic body 33 is filled in the space between the pair of connecting portion frame bodies 31 and 32 constituting the connecting portion 30, the connecting portion rubber elastic body 33 is also first, This contributes to displacement regulation in the direction in which the inner members 11, 21 of the second mounting bushes 10, 20 approach.

<Second embodiment>
The torque rod 100 of 2nd embodiment is demonstrated with reference to FIGS. FIG. 6 is a plan view of the torque rod 100. FIG. 7 is a front view of the torque rod 100. 8 is a cross-sectional view taken along the line CC of FIG. FIG. 9 is a front view of the vulcanized rubber molded product 170 excluding the ring-shaped member 150. FIG. 10 is a perspective view of the ring-shaped member 150.

  As shown in FIG. 6, the torque rod 100 of the second embodiment is spaced from the first mounting bush 10 and the first mounting bush 10 in the same manner as the torque rod 1 of the first embodiment. A second mounting bush 20 and a connecting portion 30 for connecting the bushes 10 and 20 to each other.

  The detailed configuration of the torque rod 100 will be described below. As shown in FIG. 10, the outer member 12 of the first mounting bush 10, the outer member 22 of the second mounting bush 20, and the pair of connecting portion frames 31 and 32 that constitute the torque rod 100 are integrated. The ring-shaped member 150 is formed. The ring-shaped member 150 has a bowl shape penetrating in the axial direction. This ring-shaped member 150 is obtained by slightly reducing the thickness of the ring-shaped member 50 of the first embodiment (the thickness in the vertical direction in FIG. 10). Other configurations are the same.

  Further, the rubber elastic body 13 of the first mounting bush 10, the rubber elastic body 23 of the second mounting bush 20, and the rubber elastic body 33 for the connecting portion of the connecting portion 30 constituting the torque rod 100 are integrally formed. The integrated rubber molded product 160 is configured.

  The outer side surface of the integral rubber molded product 160 has the same saddle shape as the ring-shaped member 150. Furthermore, a circumferential recess 161 is provided on the outer peripheral surface of the integral rubber molded product 160. The groove width of the circumferential recess 161 is substantially equal to the thickness of the ring-shaped member 150 (vertical thickness in FIG. 10). The shape of the bottom surface of the circumferential recess 161 corresponds to the shape of the inner circumferential surface of the ring-shaped member 150. That is, the ring-shaped member 150 is fitted into the circumferential recess 161. Further, in the integral rubber molded product 160, shoulders 162 and 163 of the circumferential recess 161 are the same as the outer peripheral surface shape of the ring-shaped member 150.

  A method for manufacturing the torque rod 100 configured as described above will be described. First, the ring-shaped member 150 and the inner members 11 and 21 constituting the first and second mounting bushes 10 and 20 are molded (ring-shaped member molding step). These are formed of a metal such as iron or aluminum or a highly rigid member such as a resin.

  Subsequently, the inner members 11 and 21 and the middle mold for molding the straightenings 13a, 13b, 23a, and 23b are positioned on a vulcanization mold (not shown). At this time, the ring-shaped member 150 is not positioned on the vulcanization mold. Subsequently, rubber is injection molded inside the vulcanization mold. Thereby, the vulcanized rubber molded product 170 shown in FIG. 9 is molded. That is, at the same time as the integral rubber molded product 160 is formed, the inner members 11 and 21 and the integral rubber molded product 160 are integrally vulcanized and bonded. The vulcanized rubber molded product 170 includes an integral rubber molded product 160 and inner members 11 and 21.

  Subsequently, a vulcanized rubber molded product 170 composed of the integral rubber molded product 160 and the inner members 11 and 21 is attached to the inside of the ring-shaped member 150 by press-fitting (rubber elastic body arranging step). Specifically, the ring-shaped member 150 is attached to the circumferential recess 161 of the integral rubber molded product 160.

  In the second embodiment, the integral rubber molded product 160 and the ring-shaped member 150 are separately molded and integrated by press-fitting in a subsequent process. That is, the integral rubber molded product 160 and the ring-shaped member 150 are not vulcanized and bonded. In general, when vulcanized and bonded, the manufacturing apparatus may be complicated, which may increase the cost. However, according to the present embodiment, since it is integrated by press-fitting without performing vulcanization adhesion, cost reduction can be achieved. Furthermore, even if vulcanization adhesion is not performed, the ring-shaped member 150 is fitted into the circumferential concave portion 161 of the integral rubber molded product 160, thereby strengthening the engagement between the two. As a result, it is possible to reliably prevent the two from separating.

<Third embodiment>
A torque rod 200 according to a third embodiment will be described with reference to FIGS. FIG. 11 is a plan view of the torque rod 200. FIG. 12 is a front view of the torque rod 200. 13 is a cross-sectional view taken along the line DD of FIG. FIG. 14 is a perspective view of the ring-shaped member 250.

  As shown in FIG. 11, the torque rod 200 of the third embodiment includes a first mounting bush 10, a second mounting bush 20 that is spaced from the first mounting bush 10, and both bushes 10. , 20.

  The connecting portion 230 connects the outer member 12 of the first mounting bush 10 and the outer member 22 of the second mounting bush 20 respectively, and a pair of connecting portion frames 231 and 232 that are spaced apart from each other. The connection reinforcement part 233 that connects the frame parts 231 and 232 for the connection part and the first connection that is filled in one side portion of the connection reinforcement part 233 in the space between the pair of connection part frame bodies 31 and 32. A rubber elastic body for a portion 234 and a second rubber elastic body for a connecting portion 235 filled in the other side portion of the connection reinforcing portion 233 in the facing space between the pair of connecting portion frame bodies 231 and 232.

  The detailed configuration of the torque rod 200 will be described below. As shown in FIG. 14, the outer member 12 of the first mounting bush 10, the outer member 22 of the second mounting bush 20, and the pair of connecting portion frames 231 and 232 constituting the torque rod 200 are integrated. The ring-shaped member 250 is formed. The ring-shaped member 250 has a bowl shape penetrating in the axial direction. Further, both ends of the connection reinforcing portion 233 are welded to an intermediate portion of the ring-shaped member 250. That is, two through holes 271 and 272 are formed.

  Further, the rubber elastic body 13 of the first mounting bush 10 constituting the torque rod 200 and the first connecting portion rubber elastic body 234 of the connecting portion 230 are integrally formed with a first integrated rubber molded product 261. Configure. The rubber elastic body 23 of the second mounting bush 20 and the second connecting portion rubber elastic body 235 of the connecting portion 230 constitute a second integrated rubber molded product 262 that is integrally formed.

  Here, in the torque rod 200 of the present embodiment, the first integral rubber molded product 261 is a portion of the inner members 11, 21, the ring-shaped member 250, and the connection reinforcing portion 233 that forms the first through hole 271. Vulcanized and bonded to the inner peripheral surface. On the other hand, the second integral rubber molded product 262 is vulcanized and bonded to the inner peripheral surface of the inner members 11, 21, the ring-shaped member 250, and the connection reinforcing portion 233 that forms the second through hole 272. .

  A method for manufacturing the torque rod 200 configured as described above will be described. First, the ring-shaped member 250, the connection reinforcing portion 233, and the inner members 11 and 21 constituting the first and second mounting bushes 10 and 20 are molded (ring-shaped member molding step). These are formed of a metal such as iron or aluminum or a highly rigid member such as a resin. Subsequently, the connection reinforcing portion 233 is welded to the ring-shaped member 250.

  Subsequently, the ring-shaped member 250 to which the connection reinforcing portion 233 is welded, and the inner members 11 and 21 and the intermediate mold for molding the straightenings 13a, 13b, 23a, and 23b are formed in a vulcanization mold (not shown). Is positioned. Subsequently, rubber is injection molded inside the vulcanization mold. Thereby, the integral rubber molded products 261 and 262 are formed, and at the same time, the ring-shaped member 250, the connection reinforcing portion 233, the inner members 11 and 21, and the integral rubber molded products 261 and 262 are integrally vulcanized and bonded (rubber Elastic body placement step).

  Subsequently, after the integral rubber molded products 261 and 262 are integrally vulcanized and bonded, only the portions of the outer members 12 and 22 of the ring-shaped member 250 are drawn. That is, the rubber elastic body 13 constituting the first mounting bush 10 and the rubber elastic body 23 constituting the second mounting bush 20 are deformed so as to reduce the size of the outer periphery.

  As described above, when the inner and outer members 11 and 21 of the first and second mounting bushes 10 and 20 are displaced, the connection reinforcing portion 233 contributes to the displacement restriction of the rubber elastic bodies 261 and 262 constituting them. To do. Furthermore, it contributes to the reinforcement of the ring-shaped member 250. Further, the rubber elastic body 13 of the first mounting bush 10 and the first connecting portion rubber elastic body 235 constitute a first integral rubber elastic body 261, and the rubber elastic body 23 of the second mounting bush 20. The second rubber elastic body for connecting portion 235 constitutes the second integral rubber molded product 262. Although the connecting part 230 has the rubber elastic bodies 234 and 235 for the connecting part, there is a possibility that the number of component parts increases. However, the increase in the number of component parts can be prevented by doing as described above.

  Furthermore, the first integral rubber molded product 261 and the second integral rubber molded product 262 are provided in different parts. Therefore, the first integral rubber molded product 261 and the second integral rubber molded product 262 can be molded from different materials. Of course, both molded products 261 and 262 can be molded from the same material.

  The first integral rubber molded product 261 and the second integral rubber molded product 262 are bonded to the ring-shaped member 250 by integral vulcanization. As a result, the first and second integral rubber molded products 261 and 262, the ring-shaped member 250, and the connection reinforcing portion 233 can be handled as substantially integral parts, contributing to a substantial reduction in the number of components. To do.

<Modification of Third Embodiment>
In the third embodiment, the integral rubber molded products 261 and 262 are integrally vulcanized and bonded to the ring-shaped member 250 and the like. In addition, the relationship of press-fitting the integral rubber molded product 160 in the second embodiment into the ring-shaped member 150 can also be applied to the third embodiment. In this case, a recess corresponding to the recess 161 in the second embodiment may be formed in each of the first and second integral rubber molded products 261 and 262.

<Others>
In the first embodiment described above, the ring-shaped member 50 integrally forms the first and second mounting bushes 10 and 20 and the pair of connecting portion frames 31 and 32. That is, the ring-shaped member 50 was formed by deforming the cylindrical pipe. In addition, the first and second mounting bushes 10 and 20 and the pair of connecting portion frames 31 and 32 are separately molded (for example, a flat plate is curved), and then separately molded. The ring-shaped member 50 may be formed by integrating the members. In any of the forming methods, the first and second mounting bushes 10 and 20 and the pair of connecting portion frames 31 and 32 are integrally formed. The same applies to the ring-shaped members 150 and 250 in the second and third embodiments described above.

1 is a plan view of a torque rod 1. FIG. 1 is a front view of a torque rod 1. FIG. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. 3 is a perspective view of a ring-shaped member 50. FIG. 3 is a plan view of the torque rod 100. FIG. 1 is a front view of a torque rod 100. FIG. It is CC sectional drawing of FIG. 3 is a front view of a vulcanized rubber molded product 170 excluding a ring-shaped member 150. FIG. 3 is a perspective view of a ring-shaped member 150. FIG. 2 is a plan view of a torque rod 200. FIG. FIG. 12 is a front view of the torque rod 200. It is DD sectional drawing of FIG. 3 is a perspective view of a ring-shaped member 250. FIG.

Explanation of symbols

1, 100, 200: torque rod 10: first mounting bush, 11: inner member, 12: outer member, 13: rubber elastic body 20: second mounting bush, 21: inner member, 22: outer member, 23 : Rubber elastic bodies 30 and 230: Connection part 31, 32, 231, 232: A pair of connection part frame bodies 33, 234 and 235: Rubber elastic body for connection part 233: Connection reinforcement part 50, 150 and 250: Ring-shaped members 60, 160, 261, 262: integral rubber molded product 161: circumferential recess

Claims (14)

A first mounting bush comprising an inner member, an outer member, and a rubber elastic body provided therebetween;
A second mounting bush that is spaced apart from the first mounting bush and includes an inner member, an outer member, and a rubber elastic body provided therebetween;
A connecting portion for connecting the first mounting bush and the second mounting bush;
A torque rod comprising:
The connecting portion connects the outer member of the first mounting bush and the outer member of the second mounting bush, respectively, and a pair of connecting portion frames that are spaced apart from each other, and for the pair of connecting portions A rubber elastic body for the connecting portion that is filled in the opposing space of the frame body,
The outer member of the first mounting bush, the outer member of the second mounting bush, and the pair of connecting portion frame bodies are integrally formed ring-shaped members,
The ring-shaped member has an inner circumferential width perpendicular to the separating direction of the inner members at a portion where the inner members of the first and second mounting bushes are disposed, A torque rod characterized by being formed larger than the circumferential width.   The rubber elastic body of the first mounting bush, the rubber elastic body of the second mounting bush, and the rubber elastic body for the connecting portion constitute an integrally molded molded rubber product. Torque rod.   The torque rod according to claim 2, wherein the integral rubber molded article is bonded to the ring-shaped member by integral vulcanization.   The torque rod according to claim 3, wherein only the portion of the outer member of the ring-shaped member obtained by integrally vulcanizing and bonding the integral rubber molded product is drawn.   The torque rod according to claim 2, wherein the integral rubber molded product is attached to the ring-shaped member by press-fitting. A circumferential recess is provided on the outer peripheral surface of the integral rubber molded product,
The torque rod according to claim 5, wherein the ring-shaped member is fitted into the recess.   The torque rod according to claim 1, wherein the connecting portion further includes a connection reinforcing portion that connects the pair of connecting portion frames. The rubber elastic body of the first mounting bush and the one side portion of the connection reinforcement portion of the rubber elastic body for the connection portion constitute a first integrated rubber molded product formed integrally,
The rubber elastic body of the second mounting bush and the other side portion of the connection reinforcing portion of the rubber elastic body for the connection portion constitute a second integrated rubber molded product formed integrally. The described torque rod.   The torque rod according to claim 8, wherein the first integral rubber molded product and the second integral rubber molded product are molded of different materials.   The torque rod according to claim 8 or 9, wherein the first integral rubber molded product and the second integral rubber molded product are bonded to the ring-shaped member by integral vulcanization.   11. The torque rod according to claim 10, wherein only a portion corresponding to the outer member is drawn and formed in the ring-shaped member obtained by integrally vulcanizing and bonding the first and second integrated rubber molded products.   The torque rod according to claim 8, wherein the first and second integral rubber molded products are attached to the ring-shaped member by press-fitting. On the outer peripheral surface of the first and second integral rubber molded products, a circumferential recess is provided,
The torque rod according to claim 12, wherein the ring-shaped member is fitted into the recess. A first mounting bush comprising an inner member, an outer member, and a rubber elastic body provided therebetween;
A second mounting bush that is spaced apart from the first mounting bush and includes an inner member, an outer member, and a rubber elastic body provided therebetween;
A connecting portion for connecting the first mounting bush and the second mounting bush;
In a method of manufacturing a torque rod comprising:
The connecting portion connects the outer member of the first mounting bush and the outer member of the second mounting bush, respectively, and a pair of connecting portion frames that are spaced apart from each other, and for the pair of connecting portions A rubber elastic body for the connecting portion filled in the opposing space of the frame body,
The outer member of the first mounting bush, the outer member of the second mounting bush, and the pair of connecting portion frames, and the inner members of the first and second mounting bushes are disposed. A ring-shaped member molding step of molding a ring-shaped member in which an inner circumferential width orthogonal to the separating direction of both the inner members in the portion is larger than the inner circumferential width in the pair of connecting portion frames;
A rubber elastic body disposing step of disposing the rubber elastic bodies of the first and second mounting bushes and the rubber elastic body for the connecting portion inside the ring-shaped member formed by the ring-shaped member forming step;
A method for producing a torque rod, comprising:

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