JP4694815B2 - Torque rod and manufacturing method thereof - Google Patents

Description

  The present invention is a kind of mount that constitutes an anti-vibration support mechanism for a vehicle body of a power unit that includes an engine in a vehicle, and a torque rod that mainly receives a torque reaction force or the like exerted on the vehicle body from the power unit as a load load. And a manufacturing method thereof.

  Conventionally, in vehicles such as automobiles, vibration transmission from a power unit including an engine, which is a main vibration generation source, to the vehicle body is suppressed, and excellent ride comfort is achieved. In order to protect, the power unit is supported by the vehicle body via an anti-vibration support mechanism. Such an anti-vibration support mechanism is generally constituted by a plurality of mount members using rubber elastic bodies, but as one kind of such mount members, it extends from the power unit supported on the vehicle body by a plurality of engine mounts or the like to the vehicle body. An engine torque rod (hereinafter simply referred to as “torque rod”) in which a torque reaction force is mainly input as a load is known. As this type of torque rod, for example, there is one that elastically couples the outer peripheral portion of the power unit that is off the torque roll shaft to the vehicle body and limits the amount of displacement of the power unit in the rolling direction relative to the vehicle body (for example, Patent Document 1).

  By the way, in recent years, extremely high safety is required for a vehicle at the time of a frontal collision or an offset collision. As a structure for improving the safety at the time of a collision on the front side of the vehicle, for example, the vehicle is A power unit has been developed in which the power unit is dropped from the inside of the engine room to the lower side (road surface side) due to a shocking heavy load at the time of collision. As a result, it is possible to effectively prevent the power unit and its surrounding structures from moving toward the inside of the vehicle at the time of a vehicle collision and damaging the passenger.

In order to realize the power unit drop-off structure as described above, for example, a stress concentration part is intentionally formed in a part of a torque rod that connects the power unit to the vehicle body side, and this stress concentration part is used as a starting point at the time of a vehicle collision. It is conceivable that the power unit is deformed or broken in a predetermined direction to drop off due to a shocking heavy load.
Japanese Patent Laid-Open No. 2001-200892

  However, the torque rod in which the stress concentration portion is formed as described above is inevitably complicated in shape and structure as compared with the conventional torque rod in which such a stress concentration portion does not exist, and the manufacturing cost is reduced. The problem arises that the cost becomes high.

  In view of the above facts, the object of the present invention is to cause the rod body to start from the stress concentration part due to a shocking heavy load at the time of a vehicle collision, and to reliably deform in a predetermined direction to drop the power unit to the road surface side. It is another object of the present invention to provide a torque rod capable of effectively suppressing an increase in the manufacturing cost of the apparatus due to the provision of the stress concentration portion, and a manufacturing method thereof.

In order to achieve the above object, a torque rod according to claim 1 of the present invention is a torque rod for elastically connecting a power unit including an engine to the vehicle body side, and includes a first annular portion and a second circular portion. A rod main body provided with a connecting stay portion that extends from the outer peripheral portion of the first annular portion to the outer peripheral side along the radial direction and is joined to the outer peripheral portion of the second annular portion; A first mounting member disposed on the inner peripheral side of the first annular portion and connected to one of the power unit and the vehicle body; and disposed on an inner peripheral side of the second annular portion; The second mounting member connected to the other, the first annular portion, and the first mounting member are disposed between the first annular portion and the first mounting member to elastically move the first annular portion and the first mounting member. A first rubber elastic body coupled to the second annular portion, and the second annular portion and the second mounting member. And a second rubber elastic body that elastically connects the second annular portion and the second mounting member, and the outer peripheral surface of the second rubber elastic body is convex toward the outer peripheral side. Forming a protrusion, and forming a concave notch portion into which the protrusion is inserted in the vicinity of the joint portion with the connection stay portion on the inner peripheral surface of the second annular portion , The deformation direction of the rod body starting from the notch is set so as to be a direction in which the power unit is dropped to the road surface side .

  The operation of the torque rod according to claim 1 of the present invention will be described below.

  In the torque rod according to the first aspect, the second rubber elastic body is formed with a protruding portion that protrudes toward the outer peripheral side on the outer peripheral surface of the second rubber elastic body, and the connecting stay portion on the inner peripheral surface of the second annular portion. By forming the concave notch part in which the protrusion is inserted in the vicinity of the joint part, the thickness of the outer peripheral side of the notch part in the second annular part becomes thinner than the other part, and the notch part Since stress concentration tends to occur near the notch portion in the second annular portion due to the shape action (stress concentration effect), it is normal if the strength near the notch portion in the second annular portion is appropriately set. Even if a steady load is applied to the rod body during vehicle operation, it is possible to reliably prevent the rod body from being deformed or broken due to this steady load, and a shocking large load when the vehicle collides Shocking heavy load More power unit the rod body starting from the vicinity of the notch in the second annular portion can be reliably deformed or destroyed in a predetermined direction, such as to fall off the road surface.

  As a result, according to the torque rod according to the first aspect, the moving direction of the power unit and the surrounding structure can be shifted with respect to the vehicle interior at the time of the vehicle collision, so that it is effective that these damage the passenger. Can be effectively prevented.

  Further, in the torque rod according to the first aspect, a protrusion is formed on the second rubber elastic body as compared with a conventional torque rod that does not have a stress concentration portion for deforming or destroying the rod body in a predetermined direction. In addition, the shape and structure of the rod body are not substantially complicated only by forming a concave notch portion into which the protrusion is inserted in the second annular portion, so that the rod body is moved in a predetermined direction. An increase in the manufacturing cost of the apparatus due to the provision of the stress concentration portion for deformation or destruction can be effectively suppressed.

  A torque rod according to a second aspect of the present invention is the torque rod according to the first aspect, wherein the first elastic rubber body has an outer peripheral surface formed with a protruding portion protruding outward, and the first A concave notch portion into which the projection portion is inserted is formed in the vicinity of the joint portion with the connection stay portion on the inner peripheral surface of the one annular portion.

  In the torque rod according to claim 2 of the present invention, similarly to the second rubber elastic body and the second annular portion, the first rubber elastic body and the first annular portion are formed with protrusions and notches. As a result, when a shocking heavy load is applied to the rod body at the time of the collision of the vehicle, the rod body is placed near the notch portion of the first annular portion and the second annular portion by the shocking heavy load. The power unit can be deformed or broken in a predetermined direction such that the power unit is dropped to the road surface side, starting from two locations near the notch.

  A torque rod according to a third aspect of the present invention is the torque rod according to the first aspect, wherein the thickness of the bent portion, which is the outer peripheral portion of the notch portion, is applied to the power unit during a vehicle collision. When a specific load is applied, the bending portion is set to be bent and deformed preferentially over other portions of the rod body by the impact load.

  Here, the annular part in claim 3 means the second annular part when the notch part is formed only in one of the first and second annular parts. In the case where the notch portions are formed on both of the annular portions, the first and second annular portions are meant.

Further, in the torque rod according to claim 4 of the present invention, in the second rubber elastic body, two straight portions are formed on both sides of the second mounting member along the axial direction of the connecting stay, Each of the two straight portions farther from the second mounting member is a stopper portion, and the protrusion is formed on the radially outer side of the stopper portion . A torque rod according to a fifth aspect is the torque rod according to the first, second, or third aspect, wherein the rod body is integrally formed of a resin.

A torque rod manufacturing method according to claim 6 of the present invention is the torque rod manufacturing method according to any one of claims 1 to 5 , wherein the mold has a cavity corresponding to the shape of the annular portion. After the rubber elastic body is loaded as an insert core, molten resin is injected into the cavity of the mold to form the annular portion on the outer peripheral side of the rubber elastic body, and at the same time, the rubber is attached to the annular portion. It has the shaping | molding process which shape | molds the said notch part by the said projection part formed in the elastic body, It is characterized by the above-mentioned.

In the torque rod manufacturing method according to claim 6 of the present invention, after the second rubber elastic body is loaded as an insert core in a mold having a cavity corresponding to the annular portion, molten resin is injected into the mold cavity. Then, the annular portion is formed on the outer peripheral side of the rubber elastic body, and at the same time, the notch portion is formed by transferring the shape of the protruding portion to the annular portion, so that the rubber elastic body corresponds to the notch portion in advance. If a projecting portion having a shape is formed, it is not necessary to use a special mold for molding (molding) an annular portion having a notch portion, and a conventional annular portion in which such a notched portion does not exist Since the annular portion having the notch portion can be formed by using a mold common to the mold for forming the rod, the stress concentration portion for deforming or destroying the rod body in a predetermined direction is the first. Increase in manufacturing cost of the apparatus by providing one or both of the annular portion and second annular portion can be effectively suppressed.

  At this time, when the cavity corresponding to the entire rod body is continuously provided in the mold, the first annular part, the second annular part, and the like can be obtained simply by injecting molten resin into the cavity. The entire rod body including the connecting stay portion can be integrally formed.

  As described above, according to the torque rod and the method of manufacturing the same of the present invention, the rod main body starts from the stress concentration portion due to a shocking heavy load at the time of a vehicle collision, and is reliably deformed in a predetermined direction to It can be dropped to the road surface side, and an increase in the manufacturing cost of the apparatus due to the provision of the stress concentration portion can be effectively suppressed.

Hereinafter, a torque rod according to an embodiment of the present invention will be described with reference to the drawings.
(Configuration of the embodiment)
1 and 2 show a torque rod according to an embodiment of the present invention. This torque rod 10 is a kind of mount that constitutes a vibration isolation support mechanism for a vehicle body of a power unit that includes an engine in a vehicle, and is interposed between, for example, a rear end portion of the power unit and the vehicle body, The power unit is restricted from being displaced in the roll direction and the longitudinal direction of the vehicle body by the torque reaction force and inertial force of the power unit.

  As shown in FIGS. 1 and 2, the torque rod 10 includes a resin rod body 12 that is elongated along one direction as a whole. The rod body 12 is provided with a first annular portion 14 having a substantially annular shape on one end side (left side in FIGS. 1 and 2) along the longitudinal direction, and the first annular portion on the other end side. A second annular portion 16 having an annular shape larger than 14 is provided. The rod body 12 is provided with a connecting stay portion 18 that extends from the outer peripheral portion of the first annular portion 14 to the outer peripheral side along the longitudinal direction of the rod main body 12 and is joined to the outer peripheral portion of the second mounting member. ing. A straight line connecting the center along the radial direction and the thickness direction of the first annular portion 14 and the center along the radial direction and the thickness direction of the second annular portion 16 is defined as the main axis S of the torque rod 10. The following description will be given with the direction along the main center S as the main axis direction of the torque rod 10.

  The torque rod 10 is provided with a first attachment member 20 and a second attachment member 22 formed in a pipe shape on the inner peripheral side of the first annular portion 14 and the second annular portion 16, respectively, in a substantially coaxial manner. Yes. As shown in FIG. 2, the torque rod 10 is provided with a cylindrical rubber bush 24 between the inner peripheral surface of the first annular portion 14 and the outer peripheral surface of the first mounting member 20. The inner peripheral surface 24 is vulcanized and bonded to the outer peripheral surface of the first mounting member 20, and the outer peripheral surface is fixed to the inner peripheral surface of the first annular portion 14 by bonding or the like. Thereby, the first attachment member 20 is elastically connected to the first annular portion 14.

  Further, as shown in FIG. 1, the torque rod 10 is provided with a substantially thick cylindrical rubber elastic body 26 between the inner peripheral surface of the second annular portion 16 and the outer peripheral surface of the first mounting member 20. The rubber elastic body 26 has an outer peripheral surface fixed to the inner peripheral surface of the second annular portion 16 by adhesion or the like. The rubber elastic body 26 is formed with two straight portions 28 and 30 so as to be adjacent to both sides of the second mounting member 22 along the main axis direction, respectively. 2 The rubber elastic body 26 is penetrated along the axial direction of the attachment member 22.

  The rubber elastic body 26 has a stopper portion 32 on the outside (right side in FIG. 1) of the straight portion 28 along the main axis direction, and a stopper portion 34 on the inside (left side in FIG. 1) of the straight portion 30. It is said that. These stopper portions 32 and 34 come into contact with the second mounting member 22 when the second mounting member 22 is displaced relative to the second annular portion 16 by a predetermined amount or more along the main axis direction. The relative displacement along the principal axis direction of the member 22 is limited.

  In the rubber elastic body 26, a pair of rubber connecting portions 36 and 38 are formed between the straight portion 28 and the straight portion 30 along the circumferential direction. The end surfaces on the inner peripheral side of these rubber connecting portions 36 and 38 are vulcanized and bonded to the outer peripheral surface of the second mounting member 22. Thereby, the pair of rubber connecting portions 36 and 38 elastically connect the second mounting member 22 to the second annular portion 16, and when the second mounting member 22 is relatively displaced along the main axis direction, the shear direction is mainly used. When the second mounting member 22 is relatively displaced along the radial direction thereof and the direction perpendicular to the main axis direction, the second mounting member 22 is elastically deformed mainly in the tension and compression directions.

  In the torque rod 10, for example, the first mounting member 20 is connected and fixed to a power unit including an engine in the vehicle via a bracket (not shown), and the second mounting member 22 is provided on the vehicle body side. It is connected and fixed to a fastening member such as a bolt (not shown). As a result, the torque rod 10 limits the displacement of the power unit in the roll direction and the longitudinal direction of the vehicle body by the torque rod 10 due to the torque reaction force and the inertial force when the vehicle suddenly starts or stops.

  As shown in FIG. 1, the rubber elastic body 26 is formed with a protruding portion 40 that protrudes outward from the outer peripheral surface thereof. The protrusion 40 has a tapered shape in which the cross-sectional shape gradually decreases in width from the inner peripheral side toward the outer peripheral side. The protrusion 40 extends over the entire width of the rubber elastic body 26 along the axial direction of the second mounting member 22. On the other hand, the second annular portion 16 is formed with a concave notch portion 42 in the vicinity of the joint portion with the connecting stay portion 18 on the inner peripheral surface thereof and into which the protruding portion 40 is inserted on the one rubber connecting portion 36 side. Has been. The notch portion 42 has a cross-sectional shape corresponding to the cross-sectional shape of the protrusion portion 40, and the outer peripheral surface of the protrusion portion 40 is in close contact with the inner peripheral surface of the notch portion 42 without a gap. ing.

  Here, a portion on the outer peripheral side of the notch portion 42 in the second annular portion 16 is a bent portion 44, and this bent portion 44 is subjected to an impact load on the power unit at the time of a vehicle collision, and this impact When the load is transmitted to the torque rod 10 along the main axis direction, the wall thickness is set so that the shock deformation preferentially bends and deforms over other portions of the rod body 12. Specifically, when an impact load is transmitted to the torque rod 10 along the main axis direction, the bent portion 44 starts from the vicinity of the bottom portion on the outermost peripheral side of the notch portion 42 as shown in FIG. It bends and deforms to open to the outer periphery. As a result, the entire rod body 12 is bent and deformed so that the deformed main shaft S ′ is V-shaped with respect to the untransformed main shaft S starting from the vicinity of the notch portion 42.

  Next, a method for manufacturing the torque rod 10 configured as described above will be described. When manufacturing the torque rod 10, first, the first mounting member 20 is inserted into a first mold (not shown) for vulcanization molding having a hollow portion (cavity) corresponding to the rubber bush 24 as an insert core. After loading as a core, vulcanized rubber is injected into the first mold, and the rubber bush 24 is vulcanized on the outer peripheral side of the first mounting member 20, and at the same time, the rubber bush 24 is vulcanized on the first mounting member 20. Glue. Similarly, for the rubber elastic body 26, the second mounting member 22 is loaded as an insert core in a second mold (not shown) for vulcanization molding having a cavity corresponding to the rubber elastic body 26, and then the second mold. The vulcanized rubber is injected into the rubber, and the rubber elastic body 26 is vulcanized on the outer peripheral side of the second mounting member 22, and at the same time, the rubber connecting portions 36 and 38 of the rubber elastic body 26 are vulcanized on the second mounting member 22, respectively. Glue.

  Next, the rubber bush 24 formed on the outer peripheral side of the first mounting member 20 and the rubber elastic body 26 formed on the outer peripheral side of the second mounting member 22 as described above are hollow corresponding to the rod body 12 respectively. After being inserted as an insert core into a third mold (not shown) for injection molding having a portion (cavity), the molten resin is emitted into the third mold, and on the outer peripheral side of the rubber bush 24 and the rubber elastic body 26 The first and second annular portions 14 and 16 are injection-molded, and the connecting stay portion 18 is injection-molded between the first and second annular portions 14 and 16.

At this time, since the protrusion 40 is formed on the rubber elastic body 26 in advance, at the same time as the formation of the second annular portion 16, the convex protrusion 40 is formed on the inner peripheral surface of the second annular portion 16. A concave notch portion 42 having a shape corresponding to is transferred and formed. In addition, the outer peripheral surfaces of the rubber bush 24 and the rubber elastic body 26 are preliminarily bonded, so that the ring portions 14 and 16 are simultaneously formed with the rubber bush 24 and the rubber elastic body. 26, respectively.
(Operation of the embodiment)
Next, the operation of the torque rod 10 according to the embodiment of the present invention configured as described above will be described.

  In the torque rod 10 according to the present embodiment, the protruding portion 40 that is convex toward the outer peripheral side is formed on the outer peripheral surface of the rubber elastic body 26, and the connecting stay portion 18 on the inner peripheral surface of the second annular portion 16 and By forming the concave notch portion 42 into which the protruding portion is inserted in the vicinity of the joint portion, the thickness of the bent portion 44 on the outer peripheral side of the notch portion 42 in the second annular portion 16 is thinner than other portions. In addition, stress concentration easily occurs in the vicinity of the notch portion 42 in the second annular portion due to the shape action (stress concentration effect) of the notch portion 42, so that the strength in the vicinity of the notch portion 42 in the second annular portion is appropriately set. If set, even if a steady load is applied to the rod body 12 during normal vehicle operation, the rod body 12 can be reliably prevented from being deformed or broken by this steady load. In the event of a collision When a large load acts on the rod main body 12 along the main axis direction, the rod main body 12 is moved from the vicinity of the notch portion 42 in the second annular portion 16 to a predetermined predetermined direction by the shocking large load. Can be reliably deformed or destroyed. As a result, according to the torque rod 10 according to the present embodiment, the direction of deformation or destruction of the rod body 12 starting from the notch portion 42 causes the power unit connected to the vehicle body side by the torque rod 10 to drop to the road surface side. If the direction is set in such a direction (drop-off direction), when a shocking load of a certain magnitude or more is applied to the power unit along the vehicle front-rear direction substantially coincident with the main shaft direction when the vehicle collides, Since it can move in the direction of falling off to the road surface side, the power unit and its surrounding structures do not move to the inside of the vehicle at the time of a vehicle collision, and it can be effectively and effectively prevented from damaging the passenger.

  Further, in the torque rod 10 according to the present embodiment, the protrusion 40 is formed on the rubber elastic body 26 even when compared with the conventional torque rod 10 that does not have a stress concentration portion for deforming or destroying the rod body 12 in a predetermined direction. And the shape and structure of the rod main body 12 are not substantially complicated only by forming the concave notch portion 42 into which the protrusion 40 is inserted into the second annular portion 16. An increase in the manufacturing cost of the torque rod 10 due to providing a stress concentration portion (in this embodiment, the notch portion 42) for deforming or destroying the main body 12 in a predetermined direction can be effectively suppressed.

  In the method for manufacturing the torque rod 10 according to the present embodiment, the rubber elastic body 26 is loaded as an insert core in the third mold having a cavity corresponding to the rod body 12, and then the molten resin is emitted into the mold cavity. The second annular portion 16 is formed on the outer peripheral side of the second rubber elastic body 26, and at the same time, the shape of the protrusion 40 is transferred to the second annular portion 16 to form the notch portion 42. If a protrusion 40 having a shape corresponding to the notch portion 42 is formed in the body 26 in advance, a dedicated rod body 12 including the second annular portion 16 having the notch portion 42 is formed (molded). There is no need to use a mold, and a lock having a notch portion 42 is formed by using a mold common to a mold for forming a conventional rod body in which such a notch portion does not exist. Since the main body 12 can be molded, an increase in manufacturing cost due to the provision of the notch portion 42 for deforming or destroying the rod main body 12 in a predetermined direction in the second annular portion 16 of the rod main body 12 can be more effectively suppressed. .

  In the torque rod 10 according to the present embodiment, the protrusion 40 and the notch 42 are provided on the second rubber elastic body 26 and the second annular portion 16 arranged on the vehicle body side, respectively. By adjusting the rotation direction around S as appropriate, even if the rubber elastic body 26 and the first annular portion 14 are provided with the protrusion 40 and the notch 42, respectively, the impact of the vehicle at a certain level or more at the time of collision When the load is applied to the power unit along the longitudinal direction of the vehicle substantially matching the main shaft direction, the power unit is moved in such a direction as to drop off to the road surface due to deformation or destruction of the torque rod 10. It becomes possible to obtain.

  In the present embodiment, the cross-sectional shapes of the protrusions 40 and the notches 42 are substantially triangular. However, the cross-sectional shapes of the protrusions 40 and the notches 42 are half if the required stress concentration action is obtained. Other shapes such as a circular shape and a rectangular shape may be used.

  Further, as in the case of the torque rod 60 shown in FIG. 4, in addition to providing the protrusions 40 and the notches 42 on the second rubber elastic body 26 and the second annular portion 16 arranged on the vehicle body side, respectively, The first rubber elastic body 24 and the first annular portion 14 disposed in the first rubber elastic body 24 may be provided with a protrusion 50 and a notch 52 having the same shape and function as the protrusion 40 and the notch 42, respectively. . Thus, by providing the first annular portion 14 and the second annular portion 16 with the protrusions 50 and 40 and the notches 52 and 42, respectively, only the one annular portion 14 and 16 has the protrusions 50 and 40. Compared with the case where the notches 52 and 42 are provided, for example, when an impact load of a certain magnitude or more is applied during a vehicle collision, the moving direction of the engine (drop-off direction) is inclined downward (downward outside). Since it can be set, the influence of the engine and its surrounding structures on passengers in the vehicle can be further effectively reduced.

It is a side view which shows the structure of the torque rod which concerns on embodiment of this invention. It is a side view which shows the state which rotated the torque rod shown by FIG. 1 90 degrees around the main axis. FIG. 2 is a side view showing a state in which a large load acting on the torque rod shown in FIG. 1 acts to deform the rod body. It is a side view which shows the structure of the modification of the torque rod which concerns on embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Torque rod 12 Rod main body 14 1st ring part 16 2nd ring part 18 Connection stay part 20 1st attachment member 22 2nd attachment member 24 Rubber bush (1st rubber elastic body)
26 Rubber elastic body (second rubber elastic body)
36 Rubber connecting part 40 Projection part 42 Notch part 44 Bending part

Claims (6)

A torque rod for elastically connecting a power unit including an engine to the vehicle body side,
A first annular portion, a second annular portion, and an outer peripheral portion of the first annular portion that extend radially outward from the outer peripheral portion of the first annular portion and are joined to the outer peripheral portion of the second annular portion. A rod body provided with a connecting stay,
A first mounting member disposed on an inner peripheral side of the first annular portion and connected to one of the power unit and the vehicle body;
A second mounting member disposed on the inner peripheral side of the second annular portion and connected to the other of the power unit and the vehicle body;
A first rubber elastic body disposed between the first annular portion and the first attachment member and elastically connecting the first annular portion and the first attachment member;
A second rubber elastic body disposed between the second annular portion and the second attachment member and elastically connecting the second annular portion and the second attachment member; And
A protrusion that is convex toward the outer peripheral side is formed on the outer peripheral surface of the second rubber elastic body, and the protrusion is formed in the vicinity of the joint with the connection stay portion on the inner peripheral surface of the second annular portion. Forming a concave notch into which the part is inserted,
The torque rod , wherein the notch portion is set so that a deformation direction of the rod body starting from the notch portion is a direction in which the power unit is dropped to the road surface side .   The first rubber elastic body has an outer peripheral surface formed with a protrusion that is convex toward the outer peripheral side, and the protrusion near the joint with the connecting stay portion on the inner peripheral surface of the first annular portion. The torque rod according to claim 1, wherein a concave notch portion into which the portion is inserted is formed.   When a shocking load is applied to the power unit at the time of a vehicle collision, the bending part is the other part of the rod body due to the shocking load. 3. The torque rod according to claim 1, wherein the torque rod is set so as to be bent and deformed preferentially over that portion.   In the second rubber elastic body, two straight portions are formed on both sides of the second mounting member along the axial direction of the connecting stay, and the second mounting member of the two straight portions is formed. The torque rod according to any one of claims 1 to 3, wherein the farther side is used as a stopper portion, and the protrusion is formed on a radially outer side of the stopper portion.   The torque rod according to any one of claims 1 to 3, wherein the rod body is integrally formed of resin. A method of manufacturing a torque rod according to any one of claims 1 to 5 ,
After loading the rubber elastic body as an insert core in a mold having a cavity corresponding to the shape of the annular portion,
The molten resin is injected into the cavity of the mold to mold the annular portion on the outer peripheral side of the rubber elastic body, and at the same time, the notch portion is formed by the protrusion formed on the rubber elastic body on the annular portion. A method for manufacturing a torque rod, comprising a molding step.

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