JP5597493B2 - Torque rod - Google Patents

Description

  The present invention relates to a torque rod that supports an engine mounted on a vehicle body.

  Various torque rods that support an engine mounted on a vehicle body and reduce vibrations transmitted from the engine to the vehicle body have been devised. The torque rod (support member) of Patent Document 1 incorporates a force generator. Furthermore, this patent document 1 is demonstrated based on 3rd Example (FIG. 7). Secondly, the engine 101 as a displacement generation source is supported by the support member 11. The support member 11 has a distal end side connection portion 90 connected to the engine 101 and a proximal end side connection portion 91 connected to the vehicle body 202. The support member 11 has a cylindrical main body 70 as shown in the figure. A cylindrical movable member 72 fitted inside the main body portion 70 so as to be relatively movable in the axial direction is provided inside the main body portion 70. A rack 72 a extending in the axial direction is formed on a part of the outer peripheral surface of the movable member 72. A mechanical actuator 71 such as a motor is installed on the outer peripheral surface 70 a of the main body 70. A pinion gear 71 b is fixed to the output shaft 71 a of the actuator 71. An opening 70b is formed at a predetermined position on the outer peripheral surface 70a of the cylindrical main body 70. The pinion gear 71b is installed so as to mesh with the rack 72a of the movable member 72 through the opening 70b.

JP 2006-177431 A

  However, in such a configuration, since the rack 72a and the pinion 71b must be engaged with each other, it is necessary to provide an opening in the torque rod to expose the rack. Therefore, although not explicitly disclosed in Patent Document 1, a cover that covers the periphery of the rack and the pinion is required. Depending on the position of the opening provided in the torque rod, the opening of the torque rod may be greatly deformed when an excessive external force is applied. However, Patent Document 1 does not recognize such a problem at all.

  The present invention has been made paying attention to such a problem, and an object thereof is to provide a torque rod capable of preventing the opening from being greatly deformed even if an excessive external force is applied. To do.

  The present invention solves the above problems by the following means.

  The torque rod according to the present invention includes a rod body including an actuator chamber that is rectangular in cross section perpendicular to an axis connecting fixed portions fixed to the engine and the vehicle body, and that opens to a short side of the rectangle. And it has an inertial mass actuator which is housed in an actuator chamber from the opening and reduces the vibration transmitted to the rod body by reciprocating the inertial mass along a shaft parallel to the axis.

  According to the present invention, the actuator chamber of the rod body opens on the short side of the rectangular cross section perpendicular to the axis connecting the fixed portions fixed to the engine and the vehicle body, so that a very large tensile force acts on the rod. However, the deformation of the opening can be prevented.

It is a figure explaining the engine support structure using the torque rod by this invention. It is a figure which shows 1st Embodiment of the torque rod by this invention. It is a perspective view which shows the trunk | drum used for the torque rod of 1st Embodiment. It is a figure explaining the lid | cover used for the torque rod of 1st Embodiment. It is a figure explaining the effect in 1st Embodiment of the torque rod by this invention. It is a figure explaining the effect in 1st Embodiment of the torque rod by this invention. It is a figure which shows 2nd Embodiment of the torque rod by this invention. It is a figure which shows 3rd Embodiment of the torque rod by this invention. It is a figure which shows 4th Embodiment of the torque rod by this invention. It is a figure which shows the lid | cover used for 5th Embodiment of the torque rod by this invention. It is a figure explaining the effect by the lid | cover used for 5th Embodiment of the torque rod by this invention. It is a figure which shows the lid | cover used for 6th Embodiment of the torque rod by this invention.

Hereinafter, embodiments for carrying out the present invention will be described in more detail with reference to the drawings.
(First embodiment)
FIG. 1 is a diagram for explaining an engine support structure using a torque rod according to the present invention. In FIG. 1, the left side is the front of the vehicle as shown by the arrow. The right side of the vehicle is the front part of the engine.

  The engine 100 is supported at two locations above the center of gravity by the right engine mount 103 and the left engine mount 104. The right engine mount 103 supports the engine 100 from the right side of the vehicle. The left engine mount 104 supports the engine 100 from the left side of the vehicle. Such a support method is called a pendulum method.

  In the Pendulum-type engine mount structure, the engine 100 is tilted around an axis connecting two mount points by a rotational inertia force during operation. In order to prevent this inclination, an upper torque rod 1-1 and a lower torque rod 1-2 are provided. Upper torque rod 1-1 is provided on the upper right side of the vehicle, and has one end connected to engine 100 and the other end connected to vehicle body 102. The upper torque rod 1-1 is mounted with the rod body 11 horizontally. The lower torque rod 1-2 is provided on the lower side of the vehicle, and has one end connected to the engine 100 and the other end connected to the vehicle body 102. The rod body 11 is also attached horizontally to the lower torque rod 1-2.

  The basic structure of the upper torque rod 1-1 and the lower torque rod 1-2 is the same. Therefore, in the following description, the torque rod 1 will be described when it is not necessary to distinguish between them.

  FIG. 2 is a view showing a first embodiment of a torque rod according to the present invention, FIG. 2 (A) is a plan view, FIG. 2 (B) is a front view, and FIG. 2 (C) is C in FIG. It is -C sectional drawing. In FIG. 2B, only the shaft 121 of the inertial mass actuator 12 is shown by a wavy line, and the inertial mass actuator 12 is omitted in FIG.

  The torque rod 1 includes a rod body 11 and an inertia mass actuator 12.

  The rod main body 11 includes an engine fixing part 111, a vehicle body fixing part 112, and a body part 113.

  The engine fixing part 111 includes an outer cylinder 111a, an inner cylinder 111b, and an elastic body 111c. The outer cylinder 111a is inserted into one end of the body 113 and fixed. The inner cylinder 111b is concentric with the outer cylinder 111a. As shown in FIG. 1, the inner cylinder 111 b is fixed to the engine 100 by inserting a bolt 105. The elastic body 111c is interposed between the outer cylinder 111a and the inner cylinder 111b. The elastic body 111c is, for example, an elastic rubber. The elastic body 111c has not only elasticity but also attenuation.

  The vehicle body fixing portion 112 has a smaller diameter than the engine fixing portion 111. The vehicle body fixing portion 112 opens in a direction orthogonal to the engine fixing portion 111. Other basic structures of the vehicle body fixing portion 112 are the same as those of the engine fixing portion 111. That is, the vehicle body fixing portion 112 is interposed between the outer cylinder 112a that is inserted and fixed to one end of the body 113, the inner cylinder 112b concentric with the outer cylinder 112a, and the outer cylinder 112a and the inner cylinder 112b. And an elastic body 112c.

  An actuator chamber 1131 is formed in the body portion 113. The actuator chamber 1131 opens in the same direction as the vehicle body fixing portion 112. The opening 1131 a is located outside a tangent line L that contacts the opening of the engine fixing portion 111 through the base 1121 of the vehicle body fixing portion 112. Further, as is clear from FIG. 2A, the body portion 113 has a constant thickness on the vehicle body fixing portion side. And the trunk | drum 113 becomes a little thin on the engine fixing | fixed part side. As is clear from FIG. 2B, the width of the body portion 113 is reduced on the vehicle body fixing portion side. In FIG. 2 (B), it is about 1/3 on the vehicle body fixing portion side. The body portion 113 has a constant width on the engine fixing portion side. 2C is a cross-sectional view taken along the line C-C in FIG. 2B, which shows a cross section orthogonal to the axis connecting the engine fixing portion 111 and the vehicle body fixing portion 112. As can be seen from FIG. 2C, the opening 1131a of the actuator chamber 1131 is open on the short side of the rectangular cross section.

  Inertial mass actuator 12 includes a shaft 121, a leaf spring 122, an inertial mass 123, and a force generator 124.

  The shaft 121 is fixed to the inner wall 1131 b of the actuator chamber 1131. The shaft 121 is disposed in parallel with an axis connecting the engine fixing part 111 and the vehicle body fixing part 112.

  Two leaf springs 122 are provided on the engine side and the vehicle body side of the shaft 121. The leaf spring 122 is an elastic part. The leaf spring 122 has a relatively small rigidity.

  The inertia mass 123 is provided around the shaft 121. Inertial mass 123 is coaxial with shaft 121. The inertial mass 123 is a rectangular tube type. The inertial mass 123 has a rectangular cross section orthogonal to the shaft 121. The inertia mass 123 is fixed to both ends of the leaf spring 122. A plate spring on the vehicle body side is fixed to the vehicle body side end of the side wall of the inertial mass 123. An engine side leaf spring is fixed to the engine side end of the side wall of the inertia mass 123. That is, the fixed portion between the leaf spring 122 and the inertia mass 123 extends from the front side to the back side. The inertial mass 123 is a magnetic metal body. The cross section of the inertial mass 123 is left-right symmetric and vertically symmetric. A part of the inner wall 123 a of the inertia mass 123 is convex toward the permanent magnet 124 c of the force generation unit 124.

  The force generator 124 reciprocates the inertial mass 123 in the axial direction of the shaft 121 (the left-right direction in FIG. 2). The force generator 124 generates force based on the speed of the torque rod 1 fed back. As a result, the force generator 124 generates a force so as to attenuate the vibration of the torque rod 1.

  The force generator 124 is provided in a space between the inertia mass 123 and the shaft 121. The force generator 124 includes a core 124a, a coil 124b, and a permanent magnet 124c.

  The core 124a has a rectangular tube shape. The core 124a is fixed to the shaft 121. The core 124a is composed of a plurality of laminated steel plates. The core 124a constitutes the magnetic path of the coil 124b. As for the core 124a, a steel plate is fixed around the shaft 121, so that the core 124a becomes a square tube-shaped core 124a as a whole. The coil 124b is wound around the core 124a. The permanent magnet 124c is provided on the outer peripheral surface of the core 124a.

  Since the force generator 124 has such a configuration, the inertial mass 123 is reciprocated in the rod axis direction by a reluctance torque generated by a magnetic field generated by the coil 124b and the permanent magnet 124c.

  FIG. 3 is a perspective view showing a body part used in the torque rod of the first embodiment.

  The body portion 113 has a rectangular cross section orthogonal to the axis connecting the fixed portions fixed to the engine and the vehicle body, and the actuator chamber 1131 opens on the short side of the rectangular cross section.

  The body portion 113 is formed with a hole for the engine fixing portion 111 and a hole for the vehicle body fixing portion 112. The opening of the engine fixing portion 111 is orthogonal to the opening 1131a of the actuator chamber 1131. The opening of the vehicle body fixing portion 112 is in the same direction as the opening 1131 a of the actuator chamber 1131. That is, the opening of the engine fixing portion 111 is orthogonal to the opening of the vehicle body fixing portion 112. The thickness a1 of the body 113 near the vehicle body fixing portion is equal to the thickness a2 near the actuator chamber. That is, the thickness of the body portion 113 is constant on the vehicle body fixing portion side. The opening diameter b1 of the hole on the vehicle body fixing portion side is equal to the opening length b2 of the actuator chamber.

  4A and 4B are views for explaining a lid used for the torque rod of the first embodiment. FIG. 4A is a partially enlarged front view of the torque rod, and FIG. 4B is a partially enlarged side view of the torque rod. 4 (C) is a view showing a lid.

  The lid 13 closes an opening 1131 a of the actuator chamber 1131 formed in the body portion 113. The lid 13 is fixed by an adhesive 14 applied to the opening 1131a of the actuator chamber 1131. The lid 13 is made of metal and has good thermal conductivity. By providing such a lid 13, the waterproof and dustproof property inside the actuator chamber 1131 is maintained.

  FIG. 5 is a diagram for explaining the operational effects of the torque rod according to the first embodiment of the present invention. FIG. 5 (A) shows a state in which a tensile force is applied to this embodiment, and FIG. The state which applied the pulling force to the form is shown.

  In the present embodiment, as described above, the actuator chamber 1131 opens on the short side of the rectangular cross section orthogonal to the axis connecting the engine fixing portion 111 and the vehicle body fixing portion 112, but the comparative embodiment has a rectangular cross section. Open on the long side. With such a configuration, the opening 1131a of the actuator chamber 1131 is positioned on the inner side of the tangent L that contacts the opening of the engine fixing portion 111 through the root 1121 of the vehicle body fixing portion 112. In contrast to such a comparative form, when a large pulling force is applied to the engine fixing portion 111 and the vehicle body fixing portion 112 as indicated by arrows, as shown by a one-dot dashed line in FIG. The shoulder portion is deformed, and the opening 1131a is deformed. Accordingly, the lid 13 may be removed. Moreover, there is a risk that a part of the sound may come off and hit the body 113 or generate abnormal noise due to resonance.

  On the other hand, in the present embodiment, the actuator chamber 1131 opens on the short side of the rectangular cross section orthogonal to the axis connecting the engine fixing portion 111 and the vehicle body fixing portion 112. With this configuration, the opening 1131a of the actuator chamber 1131 is positioned outside the tangent line L that contacts the opening of the engine fixing portion 111 through the root 1121 of the vehicle body fixing portion 112. That is, the actuator chamber 1131 includes an opening 1131a that opens to the outer surface of the body portion 113, and the opening 1131a deviates from a space (three-dimensional range) defined by connecting the engine fixing portion 111 and the vehicle body fixing portion 112. Is present at the site. When a large pulling force acts on the engine fixing portion 111 and the vehicle body fixing portion 112 as indicated by arrows, the pulling force mainly acts on the inner side of the tangent line L. Therefore, with the configuration of the present embodiment, even if a large pulling force is applied, the opening 1131a is hardly deformed as shown in FIG. Therefore, it is difficult for the lid 13 to come off, and abnormal noise can be prevented.

  FIG. 6 is a diagram for explaining the operational effects of the torque rod according to the first embodiment of the present invention.

  The torque rod 1 may be mounted on the vehicle so that the opening 1131a of the actuator chamber 1131 faces the hood hood 110. In this way, even if a part of the lid 13 is removed and abnormal noise is generated, the abnormal noise is absorbed by the soundproof material 111 attached to the back surface of the hood hood 110. Therefore, the quietness in the passenger compartment is maintained.

  Moreover, according to this embodiment, since the lid | cover 13 is metal, heat conductivity is good and heat dissipation is favorable. Therefore, even if the inertial mass actuator 12 generates heat, it is dissipated and the temperature increase of the inertial mass actuator 12 can be suppressed. For this reason, since large electric power can be supplied to the inertial mass actuator 12, the inertial mass actuator 12 can generate a large force.

  Further, the thickness a1 of the body 113 near the vehicle body fixing portion is equal to the thickness a2 near the actuator chamber. That is, the thickness of the body portion 113 is constant on the vehicle body fixing portion side. The opening diameter b1 of the hole on the vehicle body fixing portion side is equal to the opening length b2 of the actuator chamber. Therefore, stress concentration due to a change in the thickness of the rod body 11 can be prevented, and the deformation of the opening 1131a can also be suppressed.

  Furthermore, the inertial mass 123 has a rectangular cross section orthogonal to the shaft 121. In addition, the inertia mass 123 is provided with a mass in which a portion facing the permanent magnet 124c is concentrated more than other portions. Therefore, the opening area of the actuator chamber 1131 can be reduced, and the deformation of the opening 1131a can also be suppressed in this respect.

(Second Embodiment)
FIG. 7 is a view showing a torque rod according to a second embodiment of the present invention.

  In the following description, parts having the same functions as those described above are denoted by the same reference numerals, and redundant description is omitted as appropriate.

  In the trunk portion 113 of the torque rod 1 of the present embodiment, the opening of the engine fixing portion 111 is orthogonal to the opening 1131a of the actuator chamber 1131. The opening of the vehicle body fixing portion 112 is also orthogonal to the opening 1131a of the actuator chamber 1131. That is, the opening of the engine fixing portion 111 is in the same direction as the opening of the vehicle body fixing portion 112. In this embodiment as well, as in the first embodiment, the opening 1131a of the actuator chamber 1131 is located outside the tangent line L that contacts the opening of the engine fixing portion 111 through the root 1121 of the vehicle body fixing portion 112.

  Even with such a structure, even if a very large pulling force acts on the torque rod, the opening 1131a of the actuator chamber 1131 is hardly deformed as in the first embodiment. Therefore, the lid 13 does not come off and the generation of abnormal noise can be prevented.

(Third embodiment)
8A and 8B are views showing a third embodiment of the torque rod according to the present invention. FIG. 8A is a plan view, FIG. 8B is a front view, and FIG. 8C is C in FIG. It is -C sectional drawing. In order to avoid complication of the drawing, the actuator 12 is shown in the same manner as in FIG.

  In the torque rod 1 of the present embodiment, the vehicle body fixing portion 112 has the same diameter as the engine fixing portion 111.

  As shown in FIG. 8 (C), the actuator chamber 1131 formed in the body portion 113 opens on the short side of the rectangular cross section orthogonal to the axis connecting the fixed portions fixed to the engine and the vehicle body. To do.

  In this way, the deformation of the opening 1131a of the actuator chamber 1131 can be suppressed compared to the case where the actuator chamber 1131 opens on the long side of the rectangular cross section, the lid 13 is difficult to be removed, and abnormal noise is also generated. Hard to do.

(Fourth embodiment)
FIG. 9 is a view showing a fourth embodiment of the torque rod according to the present invention, FIG. 9 (A) is a partially enlarged front view of the torque rod, FIG. 9 (B) is a partially enlarged side view of the torque rod, and FIG. FIG. 9C is a view showing a seal, and FIG. 9D is a view showing a lid.

  In the torque rod 1 of the present embodiment, a rib 1121 a is formed at the base 1121 of the vehicle body fixing portion 112. 9B, a screw hole 113a for fixing the lid is provided on the extension of the rib 1121a when viewed from the opening side of the actuator chamber 1131. Then, the lid 13 is bolted to this portion via the seal 15.

  If comprised in this way, the stress of the part which fastens the lid | cover 13 can be made small, and the deformation | transformation of the part which attaches the lid | cover 13 can be suppressed. Therefore, it is possible to suppress abnormal noise from the lid 13.

(Fifth embodiment)
FIG. 10 is a view showing a lid used in the fifth embodiment of the torque rod according to the present invention, FIG. 10 (A) is a front view of the lid, and FIG. 10 (B) is a cross-sectional view taken along line BB in FIG. 10 (A). FIG. 10C is a cross-sectional view taken along the line C-C in FIG.

  The lid 13 of the present embodiment has a shape whose surface is curved outwardly. Ribs 131 are formed on the inner surface of the lid 13. As can be seen from FIG. 10C, in the present embodiment, three ribs 131 are formed. The rib 131 is parallel to the axis connecting the engine fixing part 111 and the vehicle body fixing part 112. Further, as can be seen from FIG. 10B, the rib 131 becomes higher from the end toward the center.

  FIG. 11 is a diagram for explaining the function and effect of the lid used in the fifth embodiment of the torque rod according to the present invention.

  In the torque rod 1, the inertial mass actuator 12 generates a force so as to attenuate the vibration of the torque rod 1 to reciprocate the inertial mass 123 in the axial direction of the shaft 121 (the vertical direction in FIG. 10). At this time, if the rib 131 is formed inside the lid 13 as in the present embodiment, the air rises along the rib 131 when the inertial mass 123 descends as shown in FIG. Further, when the inertial mass 123 rises as shown in FIG. 11B, the air falls along the ribs 131. For this reason, even if the inertial mass actuator 12 generates heat, heat can be radiated efficiently, and the temperature increase of the inertial mass actuator 12 can be suppressed.

  In the present embodiment, in particular, the rib 131 becomes higher from the end toward the center, so that the cross-sectional area of the air flow passage is reduced, the flow velocity increases, and the heat dissipation area increases. For this reason, it is particularly excellent in heat dissipation.

  Since large electric power can be supplied to the inertial mass actuator 12 by these, it becomes possible to generate a large force from the inertial mass actuator 12.

  Further, by providing the rib 131, the moment of inertia of the cross section increases and resonance excitation can be suppressed. In addition, since the strength increases, it becomes difficult to break even if there is an excessive input due to the accident.

(Sixth embodiment)
FIG. 12 is a view showing a cover used in a sixth embodiment of the torque rod according to the present invention, FIG. 12 (A) is a plan view of the cover, and FIG. 12 (B) is a BB cross section of FIG. 12 (A). FIG.

  An acceleration sensor 14 is fixed to the lid 13 of the present embodiment. The signal of the acceleration sensor 14 is fed back, and the force generator 124 generates a force. As a result, the force generator 124 generates a force so as to attenuate the vibration of the torque rod 1.

  The bolt 15 that fixes the acceleration sensor 14 is disposed immediately above the rib 131.

  According to the present embodiment, the heavy object (acceleration sensor 14) is fixed to the lid 13, so that the resonance frequency of the lid 13 is lowered. Therefore, the vibration isolation region of the lid 13 can be expanded. In addition, since the rigidity of the sensor mounting surface is increased, noise input to the sensor can be reduced. Furthermore, by arranging the bolt 15 directly above the rib 131, deformation of the lid 13 due to concentration of heavy objects can be suppressed.

  Without being limited to the embodiments described above, various modifications and changes are possible within the scope of the technical idea, and it is obvious that these are also included in the technical scope of the present invention.

  For example, in the fifth embodiment, the rib 131 is formed on the inner side, that is, on the actuator chamber side. However, if only the strength of the lid 13 is focused, the rib 131 may be formed on the outer side, that is, on the opposite side of the actuator chamber. Good. Further, it may be formed on both the inside and outside.

1 Torque rod 11 Rod body 111 Engine fixing part (the other fixing part)
112 Car body fixing part (one fixing part)
113 Body 1131 Actuator Chamber 1131a Opening 12 Inertia Mass Actuator 121 Shaft 122 Leaf Spring 123 Inertia Mass 124 Force Generator 124a Core 124b Coil 124c Permanent Magnet

Claims (8)

A rod body including an actuator chamber that is rectangular in cross section perpendicular to an axis connecting fixed portions fixed to the engine and the vehicle body, and that opens to the short side of the rectangle;
An inertial mass actuator that is housed in the actuator chamber from the opening and reciprocates the inertial mass along a shaft parallel to the axis to reduce vibrations transmitted to the rod body;
Torque rod having The torque rod according to claim 1,
The inertial mass has a rectangular cross section orthogonal to the shaft.
Torque rod characterized by that. In the torque rod according to claim 1 or 2,
The inertial mass actuator is
A shaft fixed to the inner wall of the actuator chamber;
A core fixed to the shaft;
A coil wound around the core;
A permanent magnet provided on the outer peripheral surface of the core,
The inertia mass is provided with a mass in which the portion facing the permanent magnet is concentrated more than other portions,
Torque rod characterized by that. In the torque rod according to any one of claims 1 to 3,
One fixed part has a smaller diameter than the other fixed part,
The opening of the actuator chamber is located outside a tangent line that contacts the opening of the other fixing portion through the root of the one fixing portion.
Torque rod characterized by that. In the torque rod according to any one of claims 1 to 4,
One fixed part has a smaller diameter than the other fixed part,
The one fixed portion opens in the same direction as the actuator chamber,
The other fixing portion opens in a direction orthogonal to the actuator chamber;
Torque rod characterized by that. In the torque rod according to any one of claims 1 to 4,
One fixed part has a smaller diameter than the other fixed part,
The one fixing part and the other fixing part open in a direction orthogonal to the actuator chamber,
further,
A rib provided at the base of the one fixing part;
A screw hole for fixing the lid provided in the extension of the rib when viewed from the opening side of the actuator chamber;
A torque rod characterized by comprising: In the torque rod according to any one of claims 1 to 6,
The actuator chamber is mounted on the vehicle so that the opening of the actuator chamber faces the hood.
Torque rod characterized by that. A fixed part fixed to the engine and the vehicle body,
A body portion connecting the fixed portions;
An inertial mass actuator that is housed in an actuator chamber provided inside the barrel and reciprocates the inertial mass in the axial direction;
In a torque rod with
The actuator chamber has an opening that opens to the outer surface of the body part,
The opening is present at a site deviating from the space defined by connecting the respective fixed portions.
Torque rod characterized by that.

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