JP2023070307A - torque rod - Google Patents

Abstract

To provide a torque rod capable of improving a degree of design freedom.SOLUTION: A torque rod 10 includes a first member 11 connected to an extension member 30 through a first vibration control base body 14, and a second member 20 connected to the extension member 30 through a second vibration control base body 16 at a position separated from the first vibration control base body 14 in extension directions X1, X2. In this torque rod 10, the second member 20 and the extension member 30 form a stopper for regulating relative displacement between the second member 20 and the extension member 30 at a position separated from a position at which the second vibration control base body 16 is connected. Accordingly, the stopper and the second vibration control base body 16 spaced from each other can be separately designed, and therefore, it is possible to improve both of a degree of design freedom of the stopper and a degree of design freedom of the second vibration control base body 16.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a torque rod, and more particularly to a torque rod capable of improving the degree of design freedom.

Conventionally, the inner peripheral surface of a cylindrical outer member and the outer peripheral surface of a shaft-shaped inner member are connected by an elastic vibration-isolating base to constitute a first vibration-isolating device and a second vibration-isolating device. Torque rods are known in which an elongated member connects a first vibration isolator and a second vibration isolator spaced apart in the direction of their extension. For example, in the torque rod disclosed in Patent Document 1, in the second vibration isolator, which is larger than the first vibration isolator, the vibration isolation performance (spring constant) that suppresses the transmission of small-amplitude vibrations in the extension direction and the It adjusts the stopper performance that regulates the large amplitude (large displacement) of In order to adjust these performances, in the second vibration isolator, concretely, the second vibration isolating base connecting the outer peripheral surface of the inner member and the inner peripheral surface of the outer member is hollowed (an axial through hole or recess). is provided, and the size and position of the currant are adjusted.

JP 2018-132133 A

However, in Patent Document 1, the design space for providing the second anti-vibration base between the outer peripheral surface of the inner member and the inner peripheral surface of the outer member is narrow. Therefore, for example, if the size and position of the gouge are determined in order to obtain the desired stopper performance, the degree of freedom of the durability and spring constant of the second anti-vibration base decreases. That is, improvement in the degree of freedom in designing the stopper conflicts with improvement in the degree of freedom in designing the second vibration-proof base.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and it is an object of the present invention to provide a torque rod capable of improving both the degree of freedom in designing the stopper and the degree of freedom in designing the second anti-vibration base. do.

In order to achieve this object, the torque rod of the present invention comprises: a first member fixed to one of the vibration receiving side and the vibration source side; a second member fixed to the other of the vibration receiving side and the vibration source side; A stretching member extending in the stretching direction with respect to the first member, a first vibration-isolating base made of an elastic body connecting the first member and the stretching member, and separated from the first vibration-isolating substrate in the stretching direction. a second vibration-isolating base made of an elastic body that connects the second member and the extending member at a position where the second vibration-isolating base is connected to the second member and the extending member; A stopper is formed at a position away from the second member for restricting the relative displacement between the second member and the extending member.

In the torque rod according to claim 1, the first member is connected to the extending member via the first vibration-isolating base, and the extending member is connected to the extending member via the second vibration-isolating base at a position apart from the first vibration-isolating base in the extending direction. A second member is connected. In such a torque rod, the second member and the extension member form a stopper that restricts relative displacement between the second member and the extension member at a position away from the position where the second vibration-proof base is connected. As a result, the stopper and the second vibration-isolating base, which are located apart from each other, can be designed separately, so that both the improvement in the degree of freedom in designing the stopper and the improvement in the degree of freedom in designing the second vibration-isolating base can be achieved.

According to the torque rod of claim 2, in addition to the effects of the torque rod of claim 1, the following effects are obtained. The second side connecting surface of the second member and the extending side connecting surface of the extending member face each other in the opposing direction and are connected to the second anti-vibration base. A second side connecting surface is provided only on one side of the second member in the opposing direction, and an extending side connecting surface is provided only on one side of the extending member in the opposing direction. As a result, one of the second member and the extending member is not sandwiched by the other in the opposing direction, so the size of the torque rod in the opposing direction is not increased compared to the case where one of the second member and the extending member is sandwiched by the other in the opposing direction. Even so, the opposing direction dimension between the second side connecting surface and the extending side connecting surface can be increased. As a result, it is possible to improve the degree of freedom in designing the second anti-vibration base that connects the second side connecting surface and the extending side connecting surface.

According to the torque rod of claim 3, in addition to the effects of the torque rod of claim 2, the following effects are obtained. The direction in which the second side connecting surface and the extending side connecting surface face each other is a direction perpendicular to the extending direction. Therefore, when vibration in the extension direction is input to the torque rod, the second anti-vibration base undergoes shear deformation. Since the spring constant of the second vibration-isolating substrate can be easily reduced by shearing deformation rather than by stretching deformation, the effect of suppressing vibration transmission by the second vibration-isolating substrate can be easily improved.

According to the torque rod of claim 4, in addition to the effects of the torque rod of claim 2, the following effects are obtained. The direction in which the second side connecting surface and the extending side connecting surface face each other is the extending direction. Therefore, when vibration in the extending direction is input to the torque rod, the second anti-vibration base undergoes expansion/contraction deformation (including curvature change of the curved portion). This makes it more difficult for the second vibration-isolating substrate to separate from the second member and the extension member compared to the case where the second vibration-isolating substrate undergoes shear deformation.

According to the torque rod of claim 5, in addition to the effects of the torque rod of claim 4, the following effects are obtained. The second anti-vibration base is convexly curved in a direction perpendicular to the extending direction (facing direction). When the second side connecting surface and the extension side connecting surface are separated in the opposite direction, the convex second vibration-isolating substrate deforms so as to approach a straight line (the curvature becomes smaller), so that the second vibration-isolating substrate can be simplified. The durability of the second anti-vibration substrate can be improved compared to the case where the second anti-vibration substrate is elongated (distorted in the stretching direction).

According to the torque rod of claim 6, in addition to the effects of the torque rod of claim 5, the following effects are obtained. The second anti-vibration bases formed in a pair spaced apart in the direction perpendicular to the stretching direction are convexly curved in directions away from each other. As a result, it is possible to suppress deformation such that one of the pair of second anti-vibration bases has a larger curvature and the other has a smaller curvature. As a result, it is possible to make it difficult to relatively displace the second member and the stretching member in the direction perpendicular to the stretching direction.

According to the torque rod of claim 7, in addition to the effects of the torque rod of any one of claims 2 to 6, the following effects are obtained. The second side connecting surface and the extension side connecting surface are convexly curved toward one side in the opposing direction. As a result, when the second side connecting surface and the extending side connecting surface are relatively displaced so that the apex of the convex shape is shifted in the direction perpendicular to the facing direction, the second side connecting surface and the extending side connecting surface are partially displaced. is narrowed and the second anti-vibration base is compressed. Therefore, since the elastic reaction force of the second anti-vibration base is likely to be greater when compressed than when stretched, relative displacement in the direction perpendicular to the facing direction between the second side connecting surface and the extending side connecting surface is suppressed. can.

(a) is a plan view of the torque rod in the first embodiment, and (b) is a cross-sectional view of the torque rod taken along line Ib-Ib of FIG. 1(a). FIG. 1B is a cross-sectional view of the torque rod taken along line II-II of FIG. 1B; (a) is a cross-sectional view of a torque rod in a second embodiment, and (b) is a plan view of the torque rod viewed from the direction of arrow IIIb in FIG. 3(a). (a) is a cross-sectional view of a torque rod in a third embodiment, and (b) is a cross-sectional view of a torque rod in a fourth embodiment. (a) is a cross-sectional view of a torque rod in a fifth embodiment, and (b) is a cross-sectional view of a torque rod in a sixth embodiment. (a) is a cross-sectional view of a torque rod in a seventh embodiment, and (b) is a partially enlarged cross-sectional view of a torque rod in an eighth embodiment.

Preferred embodiments will now be described with reference to the accompanying drawings. FIG. 1(a) is a plan view of the torque rod 10 in the first embodiment. FIG. 1(b) is a sectional view of the torque rod 10 taken along line Ib--Ib of FIG. 1(a). FIG. 2 is a cross-sectional view of the torque rod 10 taken along line II-II of FIG. 1(b). In the following, the upper side of the paper surface, the lower side of the paper surface, the inner side of the paper surface, and the front side of the paper surface of FIG. These directions do not necessarily match the vertical and horizontal directions of the vehicle on which the torque rod 10 is mounted.

The torque rod 10 is a vibration damping device that receives torque from the engine and regulates displacement of the engine in the roll direction during acceleration. The torque rod 10 includes a first member 11 fixed on the engine side (vibration source side), a second member 20 fixed on the vehicle body side (vibration receiving side), and an extension direction X1 (Fig. 1(b) left side of the paper), a first vibration isolation base 14 connecting the first member 11 and the extension member 30, and a second vibration isolation base 14 connecting the second member 20 and the extension member 30. a vibration base 16;

A direction opposite to the stretching direction X1 (the right side of the drawing in FIG. 1(b)) is defined as a stretching direction X2. The extending directions X1 and X2 are directions perpendicular to the vertical direction UD and the horizontal direction LR of the torque rod 10 . Further, vibrations mainly in the extension directions X1 and X2 are input to the torque rod 10 from the engine.

The first member 11 is a member formed in a cylindrical shape around an axis O1 along the left-right direction LR of the torque rod 10, and is made of metal such as steel or aluminum alloy. Brackets 2 fixed to the engine side are superimposed on both ends of the first member 11 in the axial direction. The first member 11 is fixed to the bracket 2 by fastening a nut 6 to a bolt 4 passing through the bracket 2 and the inner peripheral side of the first member 11 . In addition, in FIG.1(b), this bracket 2 and the bolt 4 are abbreviate|omitted and illustrated.

The first anti-vibration base 14 is an elastic body made of rubber and formed in a cylindrical shape. The inner peripheral surface of the first vibration-isolating substrate 14 is vulcanization-bonded (connected) to the outer peripheral surface of the first member 11 , and the outer peripheral surface of the first vibration-isolating substrate 14 is vulcanized-bonded to the extending member 30 .

The second anti-vibration base 16 is an elastic body made of rubber and has a rectangular shape. The upper and lower surfaces of the second anti-vibration base 16 are vulcanized and bonded to the second member 20 and the extending member 30, respectively. It should be noted that the first vibration-isolating substrate 14 and the second vibration-isolating substrate 16 may be made of an elastic material other than rubber. Elastic bodies other than rubber include thermoplastic elastomers.

The second member 20 includes a thick plate-shaped body plate portion 21 perpendicular to the vertical direction UD, fixed portions 22 projecting from both sides of the body plate portion 21 in the left-right direction LR, and an extension of the body plate portion 21. and a second side annular portion 23 provided at the end in the direction X2, and each of these portions is integrally formed of metal such as steel or aluminum alloy. The upper surface of the main body plate portion 21 is a second side connecting surface 21a to which the second anti-vibration base 16 is vulcanized and bonded, and is a plane perpendicular to the vertical direction UD.

The fixing portion 22 is a portion in which a vertically penetrating mounting hole 22 a is formed, and is provided near each of the four corners of the main body plate portion 21 . The second member 20 is fixed to the vehicle body by tightening the bolt inserted into the fixing portion 22 to the vehicle body.

The second side annular portion 23 is a member formed in an annular shape (cylindrical shape) centering on an axis O2 parallel to the axis O1. A part of the outer peripheral surface of the second side annular portion 23 is integrated with the main body plate portion 21 so that the lower surface of the main body plate portion 21 is a tangent plane to the lower end of the outer peripheral surface of the second side annular portion 23 . Furthermore, the second side annular portion 23 protrudes in the upward direction U from the body plate portion 21 .

An elastic stopper 24 made of an elastic body (rubber or thermoplastic elastomer) is provided on the inner peripheral surface of the second side annular portion 23 over the entire circumference. The elastic stopper 24 is formed in an annular shape (cylindrical shape) around the axis O2. Furthermore, one or a plurality of (two in this embodiment) elastic stoppers 25 are provided on a portion of the outer peripheral surface of the second side annular portion 23 facing the first member 11 and the extension member 30 . The elastic stoppers 24 and 25 are for buffering the contact between the second side annular portion 23 and the extending member 30 and the second anti-vibration base 16 .

The extending member 30 is a member formed by assembling together a first extending portion 31 to which the first vibration isolating base 14 is connected and a second extending portion 35 to which the second vibration isolating base 16 is connected. and aluminum alloys.

The first extending portion 31 includes a tubular portion 32 surrounding the first member 11 and a connecting portion 33 extending from a part of the outer peripheral surface of the tubular portion 32 in the extending direction X1. The cylindrical portion 32 is a cylindrical member centered on the axis O1. The outer peripheral surface of the first anti-vibration base 14 is vulcanized and bonded to the inner peripheral surface of the cylindrical portion 32 .

The connecting portion 33 is a thick plate-like portion formed parallel to the main body plate portion 21 . The connecting portion 33 is formed with a stepped portion 33a by recessing a corner portion in the extending direction X1 and the left direction L in a stepped shape (perpendicularly). A shaft-like press-fit portion 33b protrudes in the left direction L from the center of the stepped portion 33a in the extending directions X1 and X2.

Further, a side wall portion 33c protrudes downward D from a corner portion of the connecting portion 33 extending in the extending direction X1 and the right direction R. As shown in FIG. A shaft-shaped stopper shaft 33d protrudes in the left direction L from the lower end portion of the side wall portion 33c. The stopper shaft 33d is a portion that penetrates the second side annular portion 23 and the inner peripheral side of the elastic stopper 24, and is positioned on the axis O2. Between the outer peripheral surface of the stopper shaft 33d and the inner peripheral surface of the elastic stopper 24, a through space penetrating in the axial direction of the axis O2 is formed over the entire circumference. are considered to be unlinked.

The second extending portion 35 is a thick plate-like portion formed parallel to the main body plate portion 21 . The lower surface of the second extension portion 35 is provided with an extension side connection surface 35a to which the second anti-vibration base 16 is connected. The extending side connecting surface 35a is a plane perpendicular to the vertical direction UD, and faces the second side connecting surface 21a of the main body plate portion 21 in the vertical direction UD (facing direction).

A step portion 35b is formed in the second extending portion 35 by recessing the corner portions in the extending direction X2 and the right direction R in a stepped shape (perpendicularly). The stepped portion 35b of the second extending portion 35 and the stepped portion 33a of the first extending portion 31 are set in size and shape so as to mesh with each other.

A press-fitting hole 35c penetrating in the horizontal direction LR is formed in the center of the stepped portion 35b in the extending directions X1 and X2. When the stepped portion 35b of the second extending portion 35 and the stepped portion 33a of the first extending portion 31 are engaged with each other, the first extending portion 31 and the second extending portion 35 are separated by pressing the press-fit portion 33b into the press-fitting hole 35c. are assembled together.

Further, a side wall portion 35d protrudes downward D from a corner portion of the second extending portion 35 in the extending direction X2 and the left direction L. As shown in FIG. A through hole 35e penetrating in the left-right direction LR is formed in the lower end portion of the side wall portion 35d. When assembling the first extending portion 31 and the second extending portion 35, the stopper shaft 33d is press-fitted into the through hole 35e, and the second side annular portion 23 and the elastic stopper 24 are attached to the side walls 33c and 35d in the axial direction of the axis O2. sandwiched between

As a result, the stopper shaft 33d, the side wall portions 33c and 35d, and the portions where the stepped portions 33a and 35b of the first and second extending portions 31 and 35 are engaged form an extension side annular portion 38 having a square annular shape. be. The extending side annular portion 38 and the second side annular portion 23 are connected in a chain to form a chain structure. As a result, even when the second anti-vibration base 16 is broken, it is possible to prevent the extension member 30 from falling off from the second member 20 .

Further, the second side annular portion 23 and the extending side annular portion 38 connected in a chain form a stopper that restricts the relative displacement between the second member 20 and the extending member 30 . As a result, the transmission of small-amplitude vibrations between the second member 20 and the extending member 30 is suppressed by the second anti-vibration base 16, while the relative large amplitude (large displacement) between the second member 20 and the extending member 30 is suppressed. ) can be regulated. Therefore, for example, while idling vibration of the engine is suppressed by the second vibration-damping base 16, shake vibration of the engine caused by unevenness of the road surface can be restricted by the stopper.

Here, in the conventional torque rod, for example, instead of the second anti-vibration base 16, both upper and lower sides of the stopper shaft 33d of the extension side annular portion 38 and the inner peripheral surface of the second side annular portion 23 are used as the second anti-vibration base. They may be connected by a vibration base. That is, since the second vibration-isolating base is built inside the second side annular portion 23 forming the stopper and chain structure, the degree of freedom in designing the second vibration-isolating base is low, and the second vibration-isolating base needs to be thickened. It is difficult to improve durability by Further, in the conventional torque rod, there are cases where stoppers can be formed only on the portions where the second vibration-proof base is not connected, for example, on both sides in the extension directions X1 and X2 of the stopper shaft 33d.

On the other hand, according to the torque rod 10 of the present embodiment, the second member 20 and the extension member 30 are separated from the position where the second anti-vibration base 16 is connected. It forms a stopper that restricts the relative displacement with. As a result, the stopper and the second vibration-isolating base 16, which are positioned apart from each other, can be designed separately, so that both the improvement in the degree of freedom in designing the stopper and the improvement in the degree of freedom in designing the second vibration-isolating base 16 can be achieved. . Therefore, for example, the stopper can be formed over the entire circumference of the stopper shaft 33d, and the durability of the second vibration-isolating substrate 16 can be improved by making the second vibration-isolating substrate 16 thicker.

More specifically, a stopper shaft 33d is passed through the second side annular portion 23, which is a closed space surrounded by both sides in the extending directions X1 and X2 and both sides in the vertical direction UD, and a stopper is formed outside the closed space. That is, the second vibration isolating base 16 is positioned outside the stopper. As a result, even when a stopper is provided, the degree of freedom in designing the second anti-vibration base 16 can be further improved.

Further, the second member 20 and the extending member 30 forming the stopper form a chain structure in which the second side annular portion 23 and the extending side annular portion 38 are connected in a chain shape, and the second side annular portion 23 and the extending side annular portion 38 The second vibration isolation base 16 is positioned outside the annular portion 38 . As a result, even when the second member 20 and the extension member 30 are provided with a chain structure, the degree of freedom in designing the second anti-vibration base 16 that connects the second member 20 and the extension member 30 can be improved.

The elastic stoppers 24, 25 provided on the inner and outer peripheral surfaces of the second side annular portion 23 are located away from the second vibration-isolating base 16, so that the elastic stoppers 24, 25 and the second vibration-isolating base 16 are separated from each other. can be designed separately. Therefore, it is possible to prevent the degree of freedom in designing the elastic stoppers 24 and 25 and the second anti-vibration base 16 from being restricted by each other. Specifically, for example, the elastic stoppers 24 and 25 can be made of an elastic body with a large spring constant, and the second anti-vibration base 16 can be made of an elastic body with a small spring constant. As a result, the elastic reaction force when the elastic stoppers 24 and 25 are crushed is rapidly increased, and the relative displacement between the second member 20 and the extension member 30 is regulated at an early stage, and the vibration transmission is suppressed by the second vibration-proof base 16. can be improved.

Furthermore, since the elastic stoppers 24 and 25 disconnect the second member 20 and the stretching member 30, the elastic stoppers 24 and 25 are deformed in tension according to the relative displacement between the second member 20 and the stretching member 30. can be suppressed. As a result, the durability of the elastic stoppers 24, 25 can be ensured.

The second side connecting surface 21a to which the second vibration-proof base 16 is connected is provided only on one side (upward direction U) of the second member 20 in the opposing direction. Similarly, the extension-side connection surface 35a to which the second vibration-isolating base 16 is connected is provided only on one side of the extension member 30 in the facing direction (downward direction D). As a result, since one of the second member 20 and the extension member 30 is not sandwiched between the other in the vertical direction UD (opposing direction), the dimension of the torque rod 10 in the vertical direction UD compared to the case where one is sandwiched between the other. The dimension in the vertical direction UD between the second side connecting surface 21a and the extension side connecting surface 35a can be increased without increasing . As a result, the degree of freedom in designing the second anti-vibration base 16 that connects the second side connecting surface 21a and the extension side connecting surface 35a can be improved.

The direction of the main vibration input to the torque rod 10 is the extending directions X1 and X2, and the second side connecting surface 21a and the extending side connecting surface 35a face each other in the vertical direction UD perpendicular to the extending directions X1 and X2. In other words, the second member 20 and the extension member 30 are connected by the second anti-vibration base 16 in the vertical direction UD perpendicular to the direction of the main vibration. Therefore, when the main vibration is input to the torque rod 10, the second anti-vibration base 16 undergoes shear deformation. Since the spring constant of the second vibration-isolating substrate 16 can be easily reduced when the second vibration-isolating substrate 16 undergoes shear deformation compared to when the second vibration-isolating substrate 16 expands and contracts, the effect of suppressing vibration transmission by the second vibration-isolating substrate 16 is improved. It can be done easily.

The second side annular portion 23 and the extension side annular portion 38 forming the stopper and chain structure are located between the first vibration isolation substrate 14 and the second vibration isolation substrate 16 separated in the extension directions X1 and X2. As a result, the distance between the first vibration-isolating base 14 and the second vibration-isolating base 16 is set according to the desired vibration-isolating performance of the torque rod 10, and the space between them is effectively utilized to provide a stopper and chain structure. can be placed. As a result, the torque rod 10 can be miniaturized while providing the torque rod 10 with desired anti-vibration performance, stopper and chain structure.

A method of manufacturing the torque rod 10 described above will be described. First, the first member 11 and the first extending portion 31 are set in a mold, and an unvulcanized elastic gap is placed between the outer peripheral surface of the first member 11 and the inner peripheral surface of the tubular portion 32 of the first extending portion 31 . Pour your body into it. The elastic body is vulcanized to form the first anti-vibration base 14 , and the first anti-vibration base 14 is vulcanized and bonded (connected) to the first member 11 and the first extending portion 31 .

Similarly, the second member 20 and the second extending portion 35 are set in another mold, and the second vibration-isolating base 16 and the elastic stoppers 24 and 25 are formed by vulcanization molding. Then, the elastic stoppers 24 and 25 are vulcanized and adhered (connected) to the second member 20 and the second extending portion 35 . The vulcanization molding of the first vibration isolation substrate 14 and the vulcanization molding of the second vibration isolation substrate 16 may be performed simultaneously, or one of them may be performed first.

The mold for forming the second vibration-proof base 16 and the elastic stoppers 24, 25 is arranged in the axial direction of the axis O2 so as to penetrate the inner peripheral side of the cylindrical elastic stopper 24 centered on the axis O2. It is preferable that the mold be split. In this case, since the side wall portion 35d is provided with the through hole 35e instead of the stopper shaft 33d, the core can be easily pulled out and inserted between the side wall portion 35d and the second side annular portion 23. FIG. As a result, the elastic stopper 24 that is not connected to the side wall portion 35d can be easily formed by the core.

After the first vibration-isolating base 14 and the second vibration-isolating base 16 are vulcanized and molded, the press-fit portion 33b of the first extending portion 31 is pressed into the press-fitting hole 35c of the second extending portion 35. As shown in FIG. At the same time, the stopper shaft 33 d of the first extending portion 31 is inserted into the inner peripheral side of the second side annular portion 23 and the elastic stopper 24 and press-fitted into the through hole 35 e of the second extending portion 35 . As a result, the first extending portion 31 and the second extending portion 35 are assembled, and the manufacturing of the torque rod 10 is completed.

According to the manufacturing method described above, the work of connecting the second anti-vibration base 16 to the second extending portion 35 is performed in a state in which the second side annular portion 23 and the extending side annular portion 38 are not connected in a chain shape. Therefore, the handling of the second extending portion 35 and the second member 20 at the time of connection by the second anti-vibration base 16 can be facilitated. Further, after this connection, a part (side wall portion 35d) of the extending side annular portion 38 provided in the second extending portion 35 is positioned on one side of the second side annular portion 23 in the axial direction. By assembling the first extension portion 31 to the second extension portion 35 in this state, the extension-side annular portion 38 that has been divided is formed into an annular shape. A structure is formed. Thus, the manufacturing process of the torque rod 10 can be simplified.

In addition, since vulcanization molding of the first vibration-isolating substrate 14 and the second vibration-isolating substrate 16 connected to the extending member 30 can be performed separately, the first vibration-isolating substrate 14 and the second vibration-isolating substrate 16 are formed. It is easy to miniaturize the mold to be used. Furthermore, when the vulcanization molding of the first vibration-isolating substrate 14 and the second vibration-isolating substrate 16 is performed separately, the split directions of the molds for forming them can be set individually. Therefore, the work of forming the first vibration-isolating base 14 and the second vibration-isolating base 16 and the work of connecting members by the first vibration-isolating base 14 and the second vibration-isolating base 16 can be facilitated.

Next, a second embodiment will be described with reference to FIGS. 3(a) and 3(b). In contrast to the first embodiment in which the second member 20 and the extending member 30 are connected in the vertical direction UD by the second vibration-isolating substrate 16, in the second embodiment, the second vibration-isolating substrates 45 and 46 connect the second member A case of connecting 41 and stretching member 50 in the stretching directions X1 and X2 will be described. Note that the same reference numerals are given to the same parts as in the first embodiment, and the following description is omitted.

FIG. 3(a) is a sectional view of the torque rod 40 in the second embodiment. FIG. 3(b) is a plan view of the torque rod 40 viewed in the direction of arrow IIIb in FIG. 3(a). The torque rod 40 includes a first member 11 fixed to the vehicle body, a second member 41 fixed to the engine, an extension member 50 extending in the extension direction X1 with respect to the first member 11, and the first member 11. and the extension member 50 , and a pair of second vibration isolation substrates 45 , 46 connecting the second member 41 and the extension member 50 .

The second member 41 includes the main body plate portion 21, the fixed portion 22 (see FIGS. 1A and 2), the second side annular portion 23, and the end portion of the main body plate portion 21 in the extending direction X1. A standing wall portion 42 that rises upward in the U direction is provided, and these portions are integrally formed of metal such as steel or aluminum alloy.

The standing wall portion 42 is a thick plate-like portion perpendicular to the extending directions X1 and X2. A surface of the standing wall portion 42 facing the extending direction X2 is a second side connecting surface 43 to which the second anti-vibration bases 45 and 46 are vulcanized and bonded, and is a plane perpendicular to the extending directions X1 and X2.

The extending member 50 includes a cylindrical portion 32, a connecting portion 51 extending in the extending direction X1 from a portion of the outer peripheral surface of the cylindrical portion 32, a connecting plate portion 52 provided at an end of the connecting portion 51 in the extending direction X1, , and these parts are integrally formed of metal such as steel or aluminum alloy.

The connecting portion 51 is a rod-shaped portion that protrudes from the rightward R end portion of the outer peripheral surface of the tubular portion 32 at the center in the vertical direction UD. A side wall portion 33c protrudes downward D from the center of the connecting portion 51 in the extending directions X1 and X2, and a shaft-shaped stopper shaft 33d protrudes leftward L from the lower end portion of the side wall portion 33c.

In the second embodiment, since the left direction L of the second side annular portion 23 is not blocked by the extension member 50, the extension side annular portion 38 of the first embodiment is not formed in the extension member 50, and the extension member A chain structure between 50 and the second member 41 is not formed. However, since the stopper shaft 33d passes through the inner peripheral sides of the second side annular portion 23 and the elastic stopper 24, and the side wall portion 33c is positioned in the right direction R of the second side annular portion 23, the second member 41 is A stopper is formed to restrict the relative displacement between the second member 41 and the extending member 50 except for the displacement in the left direction L of .

The connection plate portion 52 is a thick plate-like portion formed parallel to the standing wall portion 42 . A surface of the connecting plate portion 52 facing the extending direction X1 is provided with an extending side connecting surface 53 to which the second anti-vibration bases 45 and 46 are connected. The extending side connecting surface 53 is a plane perpendicular to the extending directions X1 and X2, and faces the second side connecting surface 43 in the extending directions X1 and X2 (opposing directions).

The second anti-vibration bases 45 and 46 are elastic bodies made of rubber or thermoplastic elastomer. The second anti-vibration bases 45 and 46 are vulcanization-bonded to the second side connecting surface 43 in the extending direction X1, and vulcanized to the extending side connecting surface 53 in the extending direction X2. The pair of second anti-vibration bases 45 and 46 are spaced apart in the vertical direction UD perpendicular to the extending directions X1 and X2, and are curved convexly in directions away from each other. .

According to the torque rod 40 of the second embodiment, as in the first embodiment, the second member 41 and the extension member 50 are provided at positions away from the positions where the second anti-vibration bases 45 and 46 are connected. A stopper is formed by the second annular portion 23 (elastic stopper 24) and the stopper shaft 33d. More specifically, the second anti-vibration bases 45 and 46 are outside the closed space (the second side annular portion 23), which is a closed space surrounded on both sides in two mutually orthogonal directions and for forming the stopper. To position. Therefore, since the stopper and the second vibration-isolating substrates 45 and 46 can be designed separately, it is possible to improve both the degree of freedom in designing the stopper and the degree of freedom in designing the second vibration-isolating substrates 45 and 46 .

The second side connecting surface 43 and the extending side connecting surface 53 face each other in the extending directions X1 and X2, which are the directions of the main vibration input to the torque rod 40. connected to X2. Therefore, when the main vibration is input to the torque rod 40, the second anti-vibration bases 45 and 46 expand and contract. As a result, the second vibration-isolating substrates 45 and 46 are less likely to separate from the second member 41 and the extension member 50 compared to the case where the second vibration-isolating substrates 45 and 46 undergo shear deformation.

Since the second anti-vibration bases 45 and 46 are convexly curved in the vertical direction UD perpendicular to the extending directions X1 and X2, the second side connecting surface 43 and the extending side connecting surface 53 are bent by the input of the main vibration. separate from each other, the convex second anti-vibration bases 45 and 46 are deformed so as to approach straight lines (the curvature becomes smaller). Therefore, the durability of the second vibration-isolating substrates 45 and 46 can be improved compared to the case where the second vibration-isolating substrates 45 and 46 simply extend (distort in the stretching directions X1 and X2).

Furthermore, since the second anti-vibration bases 45 and 46, which are convexly curved in the vertical direction UD, are easily deformed so as to change the curvature of the convexity, the extension member 50 is inclined in the vertical direction with respect to the second member 41. It may become easy to displace to UD. However, since the pair of second vibration-isolating substrates 45 and 46 are spaced apart from each other in the vertical direction UD and curved convexly in the direction away from each other, the pair of second vibration-isolating substrates 45 and 46 It is possible to suppress deformation such that one of the bases 45 and 46 has a larger curvature and the other has a smaller curvature. This is because when such deformation occurs, not only the curvature of the second vibration-isolating substrates 45 and 46 changes, but also the second vibration-isolating substrates 45 and 46 tend to be distorted in the extension directions X1 and X2, and a large elastic reaction force is likely to occur in the second vibration-isolating substrates 45 and 46 .

On the other hand, when the curvatures of both the pair of second vibration-isolating substrates 45 and 46 change similarly, the second vibration-isolating substrates 45 and 46 are less likely to be distorted in the extending directions X1 and X2, and the second vibration-isolating substrates 45 and 46 are less likely to be distorted. A large elastic reaction force is unlikely to occur. Therefore, deformation in which the curvatures of both the second anti-vibration bases 45 and 46 change in the same manner can be facilitated. As a result, relative displacement between the second member 41 and the extending member 50 in the extending directions X1 and X2 can be permitted, but relative displacement in the vertical direction UD can be made difficult.

Next, a third embodiment will be described with reference to FIG. 4(a). In the third embodiment, a case will be described in which a U-shaped restricting portion 62 is provided in the second member 61 by partially opening the second side annular portion 23 in the circumferential direction of the first and second embodiments. The same parts as those in the first and second embodiments are denoted by the same reference numerals, and the description below is omitted.

FIG. 4(a) is a sectional view of the torque rod 60 in the third embodiment. The torque rod 60 includes a first member 11 fixed to the vehicle body, a second member 61 fixed to the engine, an extension member 30, a first vibration isolation base 14, a second member 61 and the extension member 30. and a second anti-vibration base 16 that connects the

Two intermediate plates 65 are embedded in the second anti-vibration base 16 in the third embodiment with a gap therebetween in the vertical direction UD. The intermediate plate 65 is a metal plate perpendicular to the vertical direction UD. As a result, the spring constant of the second anti-vibration base 16 in the vertical direction UD can be increased.

The second anti-vibration bases 16 on both sides of the intermediate plate 65 are connected through through holes (not shown) formed through the intermediate plate 65 . However, the second vibration-isolating substrate 16 may be vulcanized and bonded to both surfaces of the intermediate plate 65 without providing the through hole, and the second vibration-isolating substrate 16 may be connected via the intermediate plate 65 .

The second member 61 includes the body plate portion 21, the fixing portion 22 (see FIGS. 1A and 2), and a U-shaped restricting portion 62 provided at the end of the body plate portion 21 in the extending direction X2. , and an upright wall portion 64 rising from the end portion of the body plate portion 21 in the extending direction X1, and these portions are integrally formed of metal such as steel or aluminum alloy.

The restricting portion 62 is a U-shaped member that is arranged on both sides in the vertical direction UD and in the extending direction X2 with respect to the stopper shaft 33d of the extending member 30, and is open in the extending direction X1 with respect to the stopper shaft 33d. On the inner side of the restricting portion 62, elastic stoppers 63 made of an elastic material are provided (vulcanized and bonded), which are arranged on both sides of the stopper shaft 33d in the vertical direction UD and in the extending direction X2, and open in the extending direction X1. ing).

The restricting portion 62, the elastic stopper 63, and the stopper shaft 33d form a stopper that restricts the relative displacement between the second member 61 and the stretching member 30 except for the displacement of the second member 61 with respect to the stretching member 30 in a direction other than the stretching direction X2. be done.

The standing wall portion 64 is a portion that rises obliquely in the upward direction U and the extending direction X1 from the end portion of the main body plate portion 21 in the extending direction X1, and faces the second vibration-proof base 16 in the extending directions X1 and X2. Therefore, the upright wall portion 64 and the second anti-vibration base 16 form a stopper that restricts displacement of the second member 61 with respect to the extending member 30 in the extending direction X2.

In particular, since the standing wall portion 64 rises obliquely, the contact area between the standing wall portion 64 and the second vibration-proof base 16 increases as the amount of displacement of the second member 61 relative to the extending member 30 in the extending direction X2 increases. Gradually increase. Therefore, compared to the case where the contact area between the vertical wall portion 64 formed perpendicular to the extending directions X1 and X2 and the second vibration-isolating substrate 16 rapidly increases, the case where the vertical wall portion 64 collides with the second vibration-isolating substrate 16 can suppress the impact and sound of

Further, according to the torque rod 60 of the third embodiment, similarly to the first and second embodiments, the second member 61 and the extending member 30 are separated from the position where the second vibration-isolating base 16 is connected. Each stopper is formed. As a result, the stopper and the second vibration isolating base 16 can be designed separately, so that both the improvement in the degree of freedom in designing the stopper and the improvement in the degree of freedom in designing the second vibration isolating base 16 can be achieved.

Further, none of the restricting portion 62, the elastic stopper 63, the stopper shaft 33d, and the standing wall portion 64 forming the stopper form a closed space surrounding both sides in two directions perpendicular to each other, and at least one of the two sides in the two directions is is open. Therefore, even if the second anti-vibration base 16 is positioned between the regulating portion 62, the elastic stopper 63, the stopper shaft 33d, and the standing wall portion 64, the degree of freedom in designing the second anti-vibration base 16 is restricted by the stopper. can be more suppressed.

Next, a fourth embodiment will be described with reference to FIG. 4(b). In the fourth embodiment, the case where the second member 71 and the stretching member 80 are connected in the stretching directions X1, X2 and the vertical direction UD will be described. The same parts as those in the first to third embodiments are denoted by the same reference numerals, and the description below is omitted.

FIG. 4(b) is a sectional view of the torque rod 70 in the fourth embodiment. The torque rod 70 includes a first member 11 fixed to the vehicle body, a second member 71 fixed to the engine, an extension member 80 extending in the extension direction X1 with respect to the first member 11, and the first member 11. and the extension member 80, and elastic second vibration isolation substrates 16, 75 that connect the second member 71 and the extension member 80. .

The second member 71 includes the main body plate portion 21, the fixed portion 22 (see FIGS. 1A and 2), and a standing wall portion 42 that rises vertically upward U from the end of the main body plate portion 21 in the extending direction X1. , a side wall portion 72 projecting upward U from the end of the main body plate portion 21 in the extending direction X2 and the right direction R, and a stopper shaft 73 projecting leftward L from the upper end of the side wall portion 72, Each of these parts is integrally formed of metal such as steel or aluminum alloy.

The second anti-vibration base 16 is vulcanized and bonded to the second side connecting surface 21a, which is the upper surface of the main body plate portion 21. As shown in FIG. A second anti-vibration base 75 is vulcanization-bonded to the second side connecting surface 43 of the vertical wall portion 42 that faces the extending direction X2. The stopper shaft 73 is a rod-shaped (shaft-shaped) portion positioned on an axis O2 parallel to the axis O1.

The extending member 80 includes the cylindrical portion 32, a connecting portion 81 extending in the extending direction X1 from a part of the outer peripheral surface of the cylindrical portion 32, and an extending side annular portion 82 provided at the end of the connecting portion 81 in the extending direction X1. , and a connecting plate portion 83 extending in the extending direction X1 from a part of the outer peripheral surface of the extension side annular portion 82, and these portions are integrally formed of metal such as steel or aluminum alloy.

The connecting portion 81 is a thick plate-like portion formed parallel to the main body plate portion 21 . The extension-side annular portion 82 is a member that is formed in an annular shape (cylindrical shape) around the axis O2. A cylindrical elastic stopper 24 made of an elastic material is vulcanized and bonded to the inner peripheral surface of the extension-side annular portion 82 over the entire circumference.

The side wall portion 72 of the second member 71 is positioned in the right direction R of the extension-side annular portion 82 and the elastic stopper 24 , and the stopper shaft 73 is located on the inner peripheral side of the extension-side annular portion 82 and the elastic stopper 24 with a space therebetween. do. As a result, a stopper is formed that restricts the relative displacement between the second member 71 and the extending member 80 except for the displacement of the extending member 80 in the left direction L with respect to the second member 71 .

The connection plate portion 83 is a thick plate-like portion formed parallel to the main body plate portion 21 . The lower surface of the connecting plate portion 83 is the extension side connecting surface 35a to which the second vibration-proof base 16 is connected. An end surface of the connecting plate portion 83 in the extending direction X1 is an extending side connecting surface 84 to which the second anti-vibration base 75 is connected. The extending side connecting surface 84 is a plane perpendicular to the extending directions X1 and X2, and faces the second side connecting surface 43 in the extending directions X1 and X2 (opposing directions).

The second side connecting surface 21a and the extending side connecting surface 35a are connected by the second vibration isolating base 16 in the vertical direction UD, and the second side connecting surface 43 and the extending side connecting surface 84 are connected by the second vibration isolating base 75. , the ratio between the spring constant in the vertical direction UD and the spring constant in the extending directions X1 and X2 can be easily adjusted.

According to the torque rod 70 of the fourth embodiment, similarly to the first to third embodiments, the second member 71 and the extension member 80 are located at positions apart from the positions where the second vibration-isolating bases 16 and 75 are connected. , the extension-side annular portion 82 (elastic stopper 24) and the stopper shaft 73 form a stopper. More specifically, the second anti-vibration bases 16 and 75 are positioned outside the closed space (extension-side annular portion 82), which is a closed space surrounded on both sides in two directions perpendicular to each other and for forming the stopper. do. Therefore, since the stopper and the second vibration-isolating substrates 16, 75 can be designed separately, both the improvement in the degree of freedom in designing the stopper and the improvement in the degree of freedom in designing the second vibration-isolating substrates 16, 75 can be achieved.

Next, a fifth embodiment will be described with reference to FIG. 5(a). In contrast to the second embodiment in which the second member 41 and the extending member 50 are connected by the convexly curved second vibration-isolating bases 45 and 46, in the fifth embodiment, the conical-cylindrical second vibration-isolating base 91 is used. A case of connecting the second member 41 and the stretching member 50 will be described. The same parts as those in the first to fourth embodiments are denoted by the same reference numerals, and the description below is omitted.

FIG. 5(a) is a sectional view of the torque rod 90 in the fifth embodiment. The second anti-vibration base 91 of the torque rod 90 is an elastic body that connects the second side connecting surface 43 of the second member 41 and the extending side connecting surface 53 of the extending member 50 . The second anti-vibration base 91 is vulcanization-bonded to the second side connecting surface 43 in the extension direction X1, and vulcanization-bonded to the extension-side connection surface 53 in the extension direction X2.

The second anti-vibration base 91 is formed in a conical tube shape whose outer diameter increases from the extending side connecting surface 53 toward the second side connecting surface 43 . The inner diameter of the second anti-vibration base 91 is formed constant along the extending directions X1 and X2.

By adjusting the dimensions of the second vibration-isolating base 91 in the extending directions X1 and X2, the spring constants in the extending directions X1 and X2 can be easily adjusted, and the outer peripheral surface of the conical second vibration-isolating base 91 with respect to the center line can be easily adjusted. The spring constant in the vertical direction UD can be easily adjusted by adjusting the inclination. Furthermore, when the second anti-vibration base 91 has a conical tube shape compared to the case where it has a cylindrical shape, the second side connecting surface 43 and the extension side connecting surface 53 extend in the vertical direction UD and the horizontal direction LR. Since elastic reaction force in the direction of compression tends to be generated in the second vibration-isolating base 91 when it is relatively displaced, it is possible to make their relative displacement difficult.

Next, a sixth embodiment will be described with reference to FIG. 5(b). In contrast to the second embodiment in which the second member 41 and the extending member 50 are connected by a pair of convexly curved second vibration-isolating bases 45 and 46, in the sixth embodiment, a pair of linear second vibration-isolating bases 45 and 46 are used. A case where the bases 101 and 102 connect the second member 41 and the stretching member 50 will be described. The same parts as those in the first to fifth embodiments are denoted by the same reference numerals, and the description below is omitted.

FIG. 5(b) is a sectional view of the torque rod 100 in the sixth embodiment. The second anti-vibration bases 101 and 102 of the torque rod 100 are elastic bodies that connect the standing wall portion 42 of the second member 41 and the connecting plate portion 52 of the extension member 50 . The second anti-vibration bases 101 and 102 are vulcanization-bonded to the standing wall portion 42 at their ends in the extending direction X1, and vulcanized-bonded to the connecting plate portion 52 at their ends in the extending direction X2. The second anti-vibration substrates 101 and 102 are formed in a straight line parallel to the extending directions X1 and X2, and are spaced apart in the vertical direction UD. In addition, the second vibration-isolating substrate 102 is positioned in the downward direction D of the second vibration-isolating substrate 101 .

The standing wall portion 42 includes a second side connecting surface 103 to which the second vibration isolating base 101 is connected, and a second side connecting surface 104 to which the second vibration isolating base 102 is connected. there is The second side connecting surface 103 is a surface facing the extending direction X2, and is inclined in the extending direction X1 toward the downward direction D (the second side connecting surface 104). The second side connecting surface 104 is a surface facing the extending direction X2, and is inclined in the extending direction X1 toward the upward direction U (the second side connecting surface 103).

The connecting plate portion 52 includes an extension-side connection surface 105 to which the second vibration-isolating base 101 is connected, and an extension-side connection surface 106 to which the second vibration-isolating base 102 is connected. . The extending side connecting surface 105 faces the second side connecting surface 103 in the extending directions X1 and X2, and is inclined in the extending direction X1 toward the downward direction D (the extending side connecting surface 106) and parallel to the second side connecting surface 103. formed in The extending side connecting surface 106 faces the second side connecting surface 104 in the extending directions X1 and X2, and is inclined in the extending direction X1 toward the upward direction U (the extending side connecting surface 105) so as to be parallel to the second side connecting surface 104. formed in

By adjusting the inclination angles of the second side connecting surfaces 103, 104 and the extending side connecting surfaces 105, 106 with respect to the extending directions X1, X2, the spring constants in the extending directions X1, X2 and the vertical direction UD can be easily adjusted. can. Further, since the pair of second side connecting surfaces 103, 104 and the extending side connecting surfaces 105, 106 are both inclined in the extending direction X1 toward the inner side of the vertical direction UD, the second side connecting surfaces 103, 104, When 104 and extension side connecting surfaces 105 and 106 are displaced relative to each other in the vertical direction UD, the elastic reaction force in the compression direction can be easily generated in the second anti-vibration bases 101 and 102, making their relative displacement difficult. .

Next, a seventh embodiment will be described with reference to FIG. 6(a). In the seventh embodiment, the case where the second anti-vibration bases 16 and 116 are provided on both sides of the extending member 30 in the vertical direction UD will be described. The same parts as those in the first to sixth embodiments are denoted by the same reference numerals, and the description below is omitted.

FIG. 6(a) is a sectional view of the torque rod 110 in the seventh embodiment. The torque rod 110 includes a first member 11 fixed to the vehicle body, a second member 111 fixed to the engine, an extension member 30, a first vibration isolation base 14, a second member 111 and the extension member 30. and a pair of second anti-vibration bases 16 and 116 connecting the two.

The second member 111 includes a body plate portion 21 having a second side connection surface 21a, a fixing portion 22 (see FIGS. 1A and 2), a second side annular portion 23, and an extension of the body plate portion 21. An upright wall portion 42 that vertically rises in the upward direction U from an end portion in the direction X1, and an opposing plate portion 112 that extends vertically in the extending direction X2 from the upper end portion of the upright wall portion 42, and each of these portions is made of steel, an aluminum alloy, or the like. is integrally formed of metal.

The opposing plate portion 112 is a thick plate-like portion that faces the main body plate portion 21 in the vertical direction UD, and is formed parallel to the main body plate portion 21 . The facing plate portion 112 has a second side connection surface 113 that faces the second side connection surface 21 a of the main body plate portion 21 . The second side connecting surface 113 is a surface facing the downward direction D and a plane perpendicular to the vertical direction UD.

A second extending portion 35 of the extending member 30 is arranged between the second side connecting surfaces 21 a and 113 . An extension-side connection surface 35a, which is the lower surface of the second extension portion 35, faces the second-side connection surface 21a in the vertical direction UD, and an extension-side connection surface 114, which is the upper surface of the second extension portion 35, is the second-side connection surface. 113 in the vertical direction UD.

The second anti-vibration base 16 is an elastic body that connects the extending side connecting surface 35a and the second side connecting surface 21a in the vertical direction UD, and is applied to the extending side connecting surface 35a and the second side connecting surface 21a. Sulfur bonded. The second anti-vibration base 116 is an elastic body that connects the extension side connection surface 114 and the second side connection surface 113 in the vertical direction UD, and is applied to the extension side connection surface 114 and the second side connection surface 113, respectively. Sulfur bonded.

As a result, when the second member 111 and the extension member 30 are relatively displaced in the vertical direction UD, one of the second anti-vibration bases 16 and 116 is compressed and the other is stretched. Therefore, at the time of this relative displacement, a relatively large elastic reaction force in the compressive direction is generated in either of the second anti-vibration bases 16 and 116, so that the second member 111 and the extending member 30 are relatively displaced in the vertical direction UD. You can make it difficult.

An elastic stopper 118 is provided on the end surface of the second extending portion 35 facing the standing wall portion 42 in the extending directions X1 and X2, and serves as a stopper for restricting the displacement of the extending member 30 in the extending direction X1 with respect to the second member 111. It is formed. The second side annular portion 23 of the second member 111 and the stopper shaft 33 d of the extension member 30 also form a stopper that restricts the relative displacement between the second member 111 and the extension member 30 .

In the torque rod 110 according to the seventh embodiment, similarly to the first to sixth embodiments, stoppers are provided at positions of the second member 111 and the extension member 30 away from the positions where the second anti-vibration bases 16 and 116 are connected. is formed. More specifically, the second anti-vibration bases 16 and 116 are outside the closed space (the second side annular portion 23) which is a closed space surrounded on both sides in two mutually orthogonal directions and for forming the stopper. A portion that is positioned and forms a stopper in the vicinity of the elastic stopper 118 is open in the extending direction X2. As a result, the stoppers and the second vibration-isolating substrates 16, 116 can be easily designed separately. compatible.

Next, an eighth embodiment will be described with reference to FIG. 6(b). In contrast to the first embodiment in which the second side connecting surface 21a and the extending side connecting surface 35a are flat, the eighth embodiment describes the case where the second side connecting surface 121 and the extending side connecting surface 35a are curved surfaces. The same parts as those in the first to seventh embodiments are denoted by the same reference numerals, and the description below is omitted.

FIG. 6(b) is a partially enlarged sectional view of the torque rod 120 in the eighth embodiment. The left side of FIG. 6(b) shows the torque rod 120 in the vicinity of the second anti-vibration base 16 when no vibration (load) in the stretching directions X1 and X2 is input. On the right side of FIG. 6B, the vicinities (loads) in the stretching directions X1 and X2 are input, and the vicinity of the second anti-vibration base 16 in a state where the stretching member 30 is displaced in the stretching direction X2 with respect to the second member 20. of torque rod 120 is shown.

The second side connection surface 121 of the torque rod 120 is a surface provided on the upper surface of the body plate portion 21 of the second member 20 . The second side connecting surface 121 is convexly curved in the upward direction U when viewed in the left-right direction LR. The lower end of the second anti-vibration base 16 is vulcanized and bonded to the second side connecting surface 121 .

The extension side connection surface 122 of the torque rod 120 is a surface provided on the lower surface of the second extension portion 35 of the extension member 30 . The extending side connecting surface 122 is curved in a convex shape toward the upward direction U when viewed in the left-right direction LR, similarly to the second side connecting surface 121 . The upper end of the second anti-vibration base 16 is vulcanized and bonded to the extension side connecting surface 122 .

When viewed from the left-right direction LR, the second side connection surface 121 and the extension side connection surface 122 face each other in the vertical direction UD, and in a state where no vibration is input to the torque rod 120, the convex shape of each other. The vertices are aligned with the stretching directions X1 and X2. When vibrations in the extension directions X1 and X2 are input to the torque rod 120 and the vertices of the second side connection surface 121 and the extension side connection surface 122 are displaced in the extension directions X1 and X2, the second side connection surface is partially displaced. The space between 121 and the extension side connecting surface 122 is narrowed, and the second anti-vibration base 16 is compressed. Since the second anti-vibration base 16 tends to generate a larger elastic reaction force during compressive deformation than during tensile deformation, relative displacement between the second member 20 and the extending member 30 in the extending directions X1 and X2 can be made difficult.

The present invention has been described above based on the embodiments, but the present invention is not limited to the above-described embodiments, and it is easily understood that various modifications and improvements are possible without departing from the scope of the present invention. It can be inferred. For example, the axial direction of the axial center O1 of the first member 11 and the tubular portion 32 may be non-parallel to the axial direction of the axial center O2 of the second side annular portion 23 or the extension side annular portion 82. More specifically, , their axial directions may be perpendicular to each other.

Although the body plate portion 21 of the second members 20, 41, 61, 71, 111 and the connection portions 33, 81 of the extending members 30, 80 have been described as thick plates, the left and right portions of the second member 20, the extending member 30, etc. The dimensions in the direction LR may be changed, and the body plate portion 21, the connection portions 33, 81, etc. may be formed in a rod shape. Further, the connection portion 51 of the extension member 50 and the second annular portion 23 are shifted in the vertical direction UD, and the dimension of the connection portion 51 in the left-right direction LR is changed to form the connection portion 51 in a thick plate shape. can be Furthermore, each dimension of other members may be changed as appropriate.

The first member 11, the second members 20, 41, 61, 71, 111 and the extension members 30, 50, 80 may be made of synthetic resin instead of metal. Further, the inner peripheral surfaces of the second side annular portion 23 and the extension side annular portion 82 and the outer peripheral surfaces of the stopper shafts 33d and 73 may be connected by an elastic body.

The intermediate plate 65 of the third embodiment may be embedded in the other second anti-vibration substrates 16, 45, 46, 75, 91, 101, 102, 116 of the above-described forms. The number of intermediate plates 65 embedded in the second anti-vibration substrates 16, 45, 46, 75, 91, 101, 102, 116 may be one or three or more. Furthermore, one or a plurality of intermediate plates may be embedded in the first anti-vibration substrate 14 . Also, the standing wall portion 64 of the third embodiment may be formed perpendicular to the body plate portion 21 . This standing wall portion 64 may be provided in the second member 20 of the first and eighth embodiments.

In the above embodiment, the first member 11 is fixed on the engine side (vibration source side), and the second members 20, 41, 61, 71, 111 are fixed on the vehicle body side (vibration receiving side). is not limited to The first member 11 may be fixed on the vehicle body side (vibration receiving side), and the second members 20, 41, 61, 71, 111 may be fixed on the engine side (vibration source side). Also, the first member 11 and the second members 20, 41, 61, 71, 111 may be fixed on the vibration source side other than the engine. Furthermore, the torque rods 10, 40, 60, 70, 90, 100, 110, 120 may be mounted on other than vehicles (for example, aircraft, ships, industrial machines, etc.).

Alternatively, the first member 11 may be a columnar member and fixed to the vehicle body side or the engine side via fastening holes provided at both ends thereof or male screw portions protruding from both ends thereof. In addition, a cylindrical first member is fixed to the vehicle body side or the engine side, the shaft-like member is arranged on the inner peripheral side of the first member, and the inner peripheral surface of the first member and the outer peripheral surface of the shaft-like member are connected. You may connect by a 1st vibration isolation base|substrate. In this case, the extension members are the shaft-shaped member and the portions connected to both end surfaces of the shaft-shaped member and extending in the extension direction X1.

In the first, third, seventh, and eighth embodiments, the press-fitting portion 33b and the stopper shaft 33d of the first extending portion 31 are press-fitted into the press-fitting hole 35c and the through hole 35e of the second extending portion 35, thereby Although the case where the extension member 30 is formed by assembling the portion 31 and the second extension portion 35 has been described, the configuration is not limited to this. The press-fitting hole 35c and the through-hole 35e may be provided in the first extending portion 31, and the press-fitting portion 33b and the stopper shaft 33d may be provided in the second extending portion 35 correspondingly.

Further, instead of press-fitting the press-fitting portion 33b and the stopper shaft 33d into the press-fitting hole 35c and the through-hole 35e, the first extending portion 31 and the second extending portion 35 are assembled using fastening members such as bolts and rivets. Also good. In this case, the stopper shaft 33d passing through the inner peripheral side of the second side annular portion 23 may be formed by the shaft portion of a bolt or rivet.

Furthermore, the extension member 30 is placed at the first extension portion at approximately the center of the extension directions X1 and X2 so that the extension side annular portion 38 can be divided in the axial direction (left-right direction LR) of the axis O2 of the second side annular portion 23. It is not limited to the case of dividing into the 31 and the second extending portion 35, and the dividing portion may be changed as appropriate. For example, the extending member 30 may be divided into a first extending portion having the cylindrical portion 32, the extending side connecting surface 35a and the side wall portion 33c, and a second extending portion having the side wall portion 35d and the stopper shaft 33d. . Also, the stretching member 30 may be divided into three or more members.

In the second, fifth, and sixth embodiments described above, the case where the leftward direction L of the second side annular portion 23 is not blocked by the extending member 50 has been described, but the present invention is not limited to this. The extension member 50 may be provided with a side wall portion blocking the left direction L of the second side annular portion 23 . By connecting this side wall portion to the tubular portion 32 and the connecting plate portion 52 , a quadrangular extension side annular portion is formed in the extension member 50 , and the extension side annular portion and the second side annular portion 23 form a chain structure. may be formed. In this case, it is preferable to form the extension member 50 with two or more members so that the extension-side annular portion can be divided in the left-right direction LR.

Similarly, in the above-described fourth embodiment, the extension side annular portion 82 and the second side annular portion formed by providing the second member 71 with a side wall portion blocking the left direction L of the extension side annular portion 82 form a chain structure. may be formed. Also in this case, it is preferable to form the second member 71 by two or more members so that the second side annular portion can be divided in the left-right direction LR.

In the above-described third embodiment, the case where the U-shaped restricting portion 62 is provided on the second member 61 instead of the second side annular portion 23 has been described, but the present invention is not limited to this. The restricting portion 62 may be replaced with the second side annular portion 23 . Also, the second side annular portion 23 in the first, second, fifth to eighth embodiments may be replaced with the restricting portion 62 . Further, the restricting portion 62 is not limited to the U-shape, and may be positioned on at least one of both sides in the vertical direction UD and both sides in the extending directions X1 and X2 with respect to the stopper shaft 33d. For example, the restricting portion 62 may be configured to open the upward direction U and the extending direction X1 with respect to the stopper shaft 33d.

In the fourth embodiment, the extension member 80 is provided with the extension-side annular portion 82 having an annular shape centered on the axis O2 along the left-right direction LR, and the extension-side annular portion 82 is positioned on the inner peripheral side of the extension-side annular portion 82. Although the case where the stopper shaft 73 is provided on the second member 71 has been described, the present invention is not limited to this. The stopper shaft 33d may be provided on the extending member 80 and the second side annular portion 23 may be provided on the second member 71, as in the first, second, fifth to eighth embodiments. Further, the extending members 30 and 50 of the first to third and fifth to eighth embodiments are provided with the extending side annular portions 82 of the fourth embodiment, and the second members 20 of the first to third and fifth to eighth embodiments are provided. , 41, 61, 111 may be provided with the stopper shaft 73 of the fourth embodiment.

In the above-described fourth embodiment, the case where the second member 71 and the extension member 80 are connected in the extension directions X1 and X2 by the second anti-vibration base 75 has been described, but the present invention is not limited to this. Instead of the second vibration-proof base 75, the second member 71 or the extension member 80 is provided with an elastic stopper. , a stopper for restricting the displacement of the stretching member 80 in the stretching direction X1 with respect to the second member 71 may be formed.

In the fifth embodiment described above, the case where the outer diameter of the conical cylindrical second vibration-isolating base 91 increases from the extending side connecting surface 53 toward the second side connecting surface 43 has been described, but the invention is not limited to this. The outer diameter of the conical cylindrical second vibration-isolating base 91 may be configured to decrease from the extending side connecting surface 53 toward the second side connecting surface 43 . Further, in the sixth embodiment, the second side connecting surfaces 103, 104 and the extending side connecting surfaces 105, 106 may be inclined in the extending direction X2 toward the inside in the vertical direction UD.

In the eighth embodiment, the case where the second side connecting surface 121 and the extension side connecting surface 122 are convexly curved in the upward direction U when viewed from the left-right direction LR has been described. Not limited. The second side connecting surface 121 and the extension side connecting surface 122 may be curved in a convex shape toward the downward direction D when viewed from the left-right direction LR. Further, the second side connecting surface 121 and the extending side connecting surface 122 may be convexly curved toward one side in the vertical direction UD when viewed from the extending directions X1 and X2. Further, the second side connecting surface 121 and the extending side connecting surface 121 are curved convexly toward one side in the vertical direction UD when viewed from any of the left-right direction LR and the extending directions X1 and X2. Surface 122 may be formed in a domed shape.

The second side connecting surface 121 and the extension side connecting surface 122 may be applied to each form other than the eighth embodiment. When the second side connecting surface 121 and the extending side connecting surface 122 face each other in the extending directions X1 and X2, when viewed from at least one of the horizontal direction LR and the vertical direction UD, the extending directions X1 and X2 The second side connecting surface 121 and the extension side connecting surface 122 may be formed so as to be convexly curved toward one side of the .

In the above embodiment, the second side annular portion 23 and the second side annular portion 23 are provided between the first vibration-isolating substrate 14 and the second vibration-isolating substrates 16, 45, 46, 75, 91, 101, 102, and 116 separated in the extending directions X1 and X2. Although the case where the extending side annular portions 38 and 82 are positioned has been described, the present invention is not limited to this. For example, the second side annular portion 23 or Extension side annular portions 38 and 82 may be arranged.

Reference Signs List 10, 40, 60, 70, 90, 100, 110, 120 Torque rod 11 First member 14 First vibration isolation substrate 16, 45, 46, 75, 91, 101, 102, 116 Second vibration isolation substrate 20, 41 , 61, 71, 111 Second member 21a, 43, 103, 104, 113, 121 Second side connecting surface 23 Second side annular portion (part of stopper)
24, 25, 63, 118 elastic stopper (part of stopper)
30, 50, 80 extending member 31 first extending portion 33d, 73 stopper shaft (part of stopper)
35 second extension part 35a, 53, 84, 105, 106, 114, 122 extension side connecting surface 38, 82 extension side annular part (part of stopper)
X1, X2 stretching direction

Claims (7)

a first member fixed to one of the vibration receiving side and the vibration source side;
a second member fixed to the other of the vibration receiving side and the vibration source side;
a stretching member extending in a stretching direction with respect to the first member;
a first vibration-isolating base made of an elastic body that connects the first member and the extending member;
a second vibration-isolating base made of an elastic body connecting the second member and the extending member at a position away from the first vibration-isolating base in the extending direction;
The second member and the extension member form a stopper that restricts relative displacement between the second member and the extension member at a position away from a position where the second vibration-isolating base is connected. Characterized torque rod. The second member has a second side connection surface to which the second vibration-isolating base is connected,
the extending member includes an extending side connecting surface to which the second vibration-isolating base is connected and which faces the second side connecting surface in a direction opposite to the second side connecting surface;
The second side connecting surface is provided only on one side of the second member in the facing direction,
2. The torque rod according to claim 1, wherein the extending side connecting surface is provided only on one side of the extending member in the facing direction. 3. The torque rod according to claim 2, wherein said facing direction in which said second side connecting surface and said extending side connecting surface face each other is a direction perpendicular to said extending direction. 3. The torque rod according to claim 2, wherein the opposing direction in which the second side connecting surface and the extending side connecting surface face each other is the extending direction. 5. The torque rod according to claim 4, wherein said second vibration-isolating base is convexly curved in a direction perpendicular to said extending direction. The second anti-vibration base is formed in a pair spaced apart in a direction perpendicular to the stretching direction,
6. The torque rod according to claim 5, wherein the pair of second vibration-isolating substrates are convexly curved in directions away from each other. 7. The torque rod according to any one of claims 2 to 6, wherein the second side connecting surface and the extension side connecting surface are convexly curved toward one side in the opposing direction.

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