JP2005106293A - Connection rod - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the assembling workability and loadability of a connection rod for supporting torque in loading and supporting an engine on a car body, by easily attaching and equipping a mass member providing a function as a dynamic damper, to a rod main body in compact by vulcanizing molding while inhibiting the projection to an outer part. <P>SOLUTION: The mass member 6 has the approximately circular or split circular-shape surrounding the outer part of the rod main body 1, and is mounted approximately concentrically with the rod main body 1, and connected with the rod main body 1 through a rubber elastic body 7 vulcanized and adhered to both of the rod main body and the mass member. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a connecting rod for torque support for suppressing movement or vibration in the roll direction of an engine or its unit mounted on an automobile.

  An engine mounted on an automobile such as a passenger car is usually configured as a unit including a transmission and the like, incorporated in a vehicle body, and supported by an anti-vibration mount. At this time, in order to suppress the movement or vibration of the engine unit in the roll direction, a part (mainly the lower part) of the unit is connected to the vehicle body by a connecting rod called a torque rod extending in the direction opposite to the vehicle traveling direction. ing.

  As illustrated in FIG. 11, the connecting rod includes a rod main body 101 made of, for example, a metal pipe material, two cylindrical bodies 102 and 103 connected to both ends of the rod main body 101, and both cylindrical bodies. The anti-vibration bushes 104 and 105 are installed in the 102 and 103, respectively. The anti-vibration bushes 104 and 105 are formed by interposing rubber-like elastic bodies 143 and 153 between the inner cylinders 141 and 151 and the outer cylinders 142 and 152, and press-fitting the outer cylinders 142 and 152 into the cylinders 102 and 103. It is fixed by doing.

  In such a connecting rod, a dynamic damper 200 is provided in the rod main body 101 for the purpose of improving vibration isolation characteristics, and a mass member 106 for adjusting the mass constituting the damper 200 is attached to a part of the rod main body 101. It is worn.

  Conventionally, as shown in FIG. 11, the mass member 106 is attached to, for example, the rod body 101 by riveting the rod body 101 between the mass member 106 and the fixing plate 106a. Reference numeral 106b denotes a riveting portion.

  However, mounting by riveting while adjusting the mounting position requires a lot of work, and tuning of the natural frequency is not easy. In addition, since the mass member 106 protrudes outward from the rod body 101, this may be an obstacle when the engine unit is connected to and supported by the vehicle body, and an extra space is secured in the engine room. There is also a need to do.

  In the present invention, as the connecting rod for torque support, a mass member for mass adjustment for giving a function as a dynamic damper can be easily attached to the rod body while suppressing outward protrusion, It is easy to tune the natural frequency, and offers excellent assembly and mounting. .

  The present invention includes, as a basic configuration, a rod body, a bush holding cylinder connected to both ends of the rod body, an anti-vibration bush with an inner cylinder installed in both cylinders, and an attachment to the rod body. A connecting rod provided with a mass member, wherein the mass member has a substantially ring shape surrounding an outer portion of the rod body, is arranged substantially concentrically with the rod body, and is vulcanized with respect to the rod body. It is characterized by being connected through a bonded rubber-like elastic body.

  According to this connecting rod, the mass member for causing the rod main body to function as a dynamic damper can be accurately attached to the rod main body at a predetermined position by vulcanization molding of the rubber-like elastic body, and excellent in integration. Further, since work such as riveting is not required, it is easy to adjust the mass and tune the natural frequency.

  Moreover, since the mass member has a substantially ring shape and is arranged substantially concentrically with the rod body, the mass member has a small thickness, and even if it surrounds the outside of the rod body, It does not overhang from the rod body. Therefore, when the engine unit is used as a torque rod that is connected to and supported by the vehicle body, the mass member does not get in the way and it is not necessary to secure an extra space in the engine room.

  In the connecting rod, the mass member has a split ring shape in which a part thereof is cut out larger than the outer diameter of the rod, and is arranged outside the rod body from the cutout portion and continuously provided by a rubber-like elastic body. Is preferred.

  Thereby, at the time of vulcanization molding, the mass member can be easily set so as to be fitted from the side to the rod body, and the setting operation at the time of vulcanization molding can be easily performed. In addition, it is possible to attach a mass member as described above to a rod that has a cylinder for holding a bush at both ends of the rod body or a finished connecting rod, and attach it by vulcanization molding as described above. Become.

  If the mass member is substantially square and has a split ring shape with one side cut out, the mass member has a large weight relative to the outer diameter compared to a circular split ring shape. The outer diameter of the mass member can be reduced accordingly.

  Further, in the connecting rod, in the case where the mass member is connected to the rod body by a rubber-like elastic body provided across the rod body, the mass member attached substantially concentrically with the rod body The vibration of the object to be supported by the connecting rod can resonate by the spring action of the rubber-like elastic body, and the vibration absorbing action is achieved as a dynamic damper.

  Another aspect of the present invention is a connecting rod including a rod body, a cylinder for holding a bush, an anti-vibration bush, and a mass member as basic components in the same manner as described above, for two rods in which the rod bodies are arranged in parallel. The mass member is arranged at an intermediate position between the two plates, and is continuously provided via a rubber-like elastic body that is vulcanized and bonded to both the mass member and the two plates. It is characterized by becoming.

  Also in this connecting rod, the mass member can be accurately attached to a predetermined position by vulcanization molding of a rubber-like elastic body with respect to the two rod plates constituting the rod body, and tuning is facilitated. Moreover, since the mass member is between the two plates and does not protrude from the rod body, the mass member does not get in the way when used as a torque rod for supporting the engine unit on the vehicle body, It does not take up extra space.

  Further, since the mass member is connected to and supported by the two plates by the rubber-like elastic bodies provided on both sides of the mass member, the mass member is favorably resonated with respect to the vibration of the object to be supported. This effectively absorbs vibration.

  Still another aspect of the present invention is a connecting rod comprising, as basic components, a rod body, a bush holding cylinder, a vibration isolating bush, and a mass member as described above. The rod body has a substantially U-shaped cross section. The mass member is arranged inside the rod main body and is continuously provided via a rubber-like elastic body that is vulcanized and bonded to both the mass member and the rod main body.

  Also in this connecting rod, the mass member can be accurately attached to the rod body at a predetermined position by vulcanization molding of a rubber-like elastic body, and tuning is facilitated. In addition, since the mass member is in the rod body having a substantially U-shaped cross section and does not protrude from the rod body, the mass member interferes with space when used as a torque rod for supporting the engine unit. Never become.

  Further, in this connecting rod, if the mass member is connected to both side plate portions of the rod body having a substantially U-shaped cross section by rubber-like elastic bodies provided on both sides thereof, the vibration of the object to be supported can be prevented. The mass member can resonate well, and the action as a dynamic damper is effectively achieved.

  Still another invention of the present invention is similar to the above, in a connecting rod comprising a rod body, a cylinder for holding a bush, a vibration isolating bush, and a mass member as a basic structure, the rod body having an angular cross section. A rubber-like shape that is U-shaped, has a square opening in its center plate, and the mass member is disposed inside the opening and vulcanized and bonded to both the mass member and the rod body It is characterized by being connected through an elastic body.

  Also in this connecting rod, the mass member can be accurately attached to the rod body at a predetermined position by vulcanization molding of a rubber-like elastic body. Moreover, since the mass member is arranged in the opening of the central plate portion of the rod body having a substantially U-shaped cross section and does not protrude from the rod body, when used as a torque rod for supporting the engine unit, The mass member does not disturb the space.

  In the connecting rod, inwardly raised and raised pieces are provided opposite to each other in the opening of the rod body, and the mass member is disposed in the middle of the both raised and raised pieces and provided on both sides thereof. It is preferable that the rubber-like elastic body is connected to the both raised and raised pieces. Accordingly, the mass member can be reliably disposed in the rod body having a substantially U-shaped cross section, and the mass member can resonate well in the opening with respect to the vibration of the support object, thereby absorbing vibration as a dynamic damper. The effect can be exhibited well.

  According to the connecting rod of the present invention, the mass member for adjusting the mass for providing a function as a dynamic damper can be easily compacted by vulcanization molding to the rod body, and can be prevented from projecting outward. Attached equipment can be provided, it is excellent in assemblability and mountability, and can be used particularly suitably as a torque rod for torque support when an automobile engine is mounted and supported on a vehicle body.

  Hereinafter, preferred embodiments of the connecting rod of the present invention will be described with reference to the drawings, but the present invention is not limited thereto. 1 to 3 show a first embodiment of a connecting rod according to the present invention. In the figure, 1 is a rod body of a required length, 2 and 3 are bush holding cylinders connected to both ends of the rod body 1, and 4 and 5 are inside the cylinders 2 and 3, respectively. An anti-vibration bush with an installed inner cylinder is shown, and 6 is a mass member attached to the rod body 1.

  The rod body 1 is made of a rod-like body such as a metal pipe similar to the conventional one. The rod-like body is not limited to a circular pipe, but a square pipe or a solid rod body can be used. However, in practice, a hollow circular pipe as shown in the figure is preferably used. As shown in the figure, the rod body 1 is connected to both ends thereof by being welded to the outer circumferences of the cylindrical bodies 2 and 3.

  The anti-vibration bushes 4 and 5 are formed by interposing rubber-like elastic bodies 43 and 53 between inner cylinders 41 and 51 and outer cylinders 42 and 52, which are attachment members for shaft members (not shown). The outer cylinders 42 and 52 are press-fitted and fixed to the cylinders 2 and 3. In the case of the figure, the vibration isolating bush 5 on the large diameter side is provided with a cavity 54 penetrating the rubber-like elastic body 53 in the axial direction. The anti-vibration bush can be installed in the cylinders 2 and 3 by omitting the outer cylinders 42 and 52. In the case of the first embodiment, the mass member 6 is configured as follows and is attached to a substantially central portion in the longitudinal direction of the rod body 1.

  The mass member 6 has a substantially ring shape that can surround the outer portion of the rod body 1 with a certain distance, and particularly preferably a split ring shape in which a part is cut larger than the rod outer diameter a as shown in the figure. I am doing. Reference numeral 61 denotes the notch, and the notch width b of the notch 61 is slightly larger than the rod outer diameter a. The mass member 6 is arranged substantially concentrically so as to surround the outside of the rod body 1, and the rod is interposed through a rubber-like elastic body 7 vulcanized and bonded to both the mass member 6 and the rod body 1. It is connected to the main body 1. When the mass member 6 has an annular shape without the notch 61, the mass member 6 is set so as to be fitted to the rod main body 1 before the cylindrical bodies 2 and 3 are welded to the rod main body 1, and the rubber-like elasticity is set. The rod body 1 and the mass member 6 are continuously integrated by the rubber-like elastic body 7 by vulcanization molding of the body 7. Thereafter, the cylindrical bodies 2 and 3 are welded to both ends of the rod body 1.

  When the mass member 6 has a split ring shape, the mass member 6 can be easily set so as to be fitted from the side through the portion of the notch 61 to the rod body 1. It is possible to vulcanize and integrate the cylinders 2 and 3 for holding the bushes at both ends and to continuously integrate them. Alternatively, after the cylinders 2 and 3 are welded to both ends of the rod body 1, vulcanization and molding are performed. Can also be integrated. It is also possible to set the mass member 6 and vulcanize and mold the finished connecting rod as described above. In any case, the rubber-like elastic body 7 that connects the rod body 1 and the mass member 6 is provided over the entire length in the circumferential direction of the mass member 6, or on four or three sides of the rod body 1. However, in practice, it is preferable that the rod body 1 is provided in two opposite positions with the rod body 1 interposed therebetween as shown in the figure. That is, by this, the mass member 6 can resonate well with respect to the vibration of the support object, and the vibration absorbing action as a dynamic damper can be exhibited well.

  According to the connecting rod of this embodiment, the mass member 6 for causing the rod body 1 to function as a dynamic damper can be accurately attached to a predetermined position by vulcanization molding, so that mass adjustment and natural frequency tuning can be performed. Easy to set up. In addition, since the mass member 6 has a substantially ring shape and is arranged substantially concentrically with the rod body, a large mass can be secured with a small thickness. Moreover, even if it surrounds the outside of the rod body 1, it does not overhang from the rod body 1.

  The mass member 6 is not limited to an annular shape as shown in FIG. 3 or a split ring shape with a part thereof cut away, but may be a substantially rectangular ring shape with rounded corners, or FIG. As shown in FIG. 2, it is possible to form a split ring shape in which one side portion of a substantially square ring shape is cut out. In this case, it is possible to hold a large weight relative to the outer diameter as compared with a circular split ring shape, and it is possible to reduce the outer diameter and increase the mass, which is advantageous in practice. In each of the embodiments described above, the thickness, the circumferential length, the diameter, etc. of the mass member 6 can be appropriately set according to the required mass.

  5 and 6 show a second embodiment of the connecting rod of the present invention. In this 2nd Example, the same sign is attached | subjected about the structural member and structural part which are common in 1st Example. In the second embodiment, the rod body 1 is composed of two rod plates 12 and 12 arranged in parallel, and both ends are welded to the cylinders 2 and 3 for holding the bushes so that the plate surfaces are parallel to each other. Facing each other. A column-shaped mass member 6 having a required length for adjusting the mass is disposed at an intermediate position between the two plates 12 and 12, and the mass member 6 and the two plates 12 and 12 are Both plates 12 and 12 are connected and supported via rubber elastic bodies vulcanized and bonded to each other, particularly rubber elastic bodies 72 and 72 provided on both sides of the mass member 6.

  Also in this connecting rod, the mass member 6 can be accurately attached at a predetermined position by vulcanization molding of the rubber-like elastic bodies 72, 72, and is protruded outward from the rod body 1 by the two plates 12, 12. Equipped with low bulk without any problems. In addition, the mass member 6 can resonate well between the plates 12 and 12 by the spring action of the rubber-like elastic bodies 72 and 72 on both sides with respect to the vibration of the object to be supported, and the vibration absorbing action as a dynamic damper is also good. To be done.

  In this embodiment, the length, diameter, and shape of the mass member 6 can be appropriately set according to the required mass and the like within a range in which the support state can be secured. Further, the mass member 6 may be vulcanized and connected to both ends of the rod main body 1 by the plates 12 and 12 before welding the bush holding cylinders 2 and 3, or may be connected to both ends of the rod main body 1. After the bodies 2 and 3 are welded, they can be continuously formed by vulcanization molding.

  FIG. 7 shows a third embodiment of the present invention, which is a modification of the second embodiment, and the same reference numerals are given to components and components common to the above embodiment. In this embodiment, the rod body 13 has a substantially U-shaped cross section that is mainly square, and the mass member 6 is disposed inside the rod body 13 so that the mass member 6, the rod body 13, These are connected through a rubber-like elastic body 73 vulcanized and bonded to both. In particular, as shown in the figure, the mass members 6 are connected to both side plate portions 13a, 13a of the rod body 13 having a substantially U-shaped cross section by rubber-like elastic bodies 73, 73 provided opposite to each other on both sides of the mass member 6. Can be supported.

  Also in this connecting rod, the mass member 6 can be accurately attached at a predetermined position by vulcanization molding of the rubber-like elastic bodies 73, 73, and can be equipped without protruding outward from the rod body 13, and is also supported. The action as a dynamic damper by the resonance of the mass member 6 is also satisfactorily performed against the vibration of the object.

  Also in this third embodiment, the mass member 6 may be vulcanized and connected to the rod body 73 before welding the bushing holding cylinders 2 and 3 to both ends of the rod body 73, or the rod body 73. It is also possible to connect the cylinders 2 and 3 to both ends of the steel plate by vulcanization and continuous connection.

  8 to 10 show a fourth embodiment of the connecting rod of the present invention. In this 4th Example, the same sign is attached | subjected about the structural member and structural part which are common in said Example. In the connecting rod of this embodiment, the rod body 14 has a substantially U-shaped cross section with a square shape, a square opening 16 is provided in the central plate portion 15, and the mass member 6 is disposed inside the opening 16. And is connected to both the mass member 6 and the rod body 14 via a rubber-like elastic body 74 that is vulcanized and bonded.

  In particular, in the case of the figure, the opening 16 has a rectangular shape in the longitudinal direction of the rod main body 14, and both sides opposite to the longitudinal direction are inward of the central plate portion 15 toward the inside of a substantially U-shaped cross section. Cut-and-raised pieces 17 and 17 that are substantially perpendicular to each other are provided, and the mass member 6 is disposed between the two raised-and-raised pieces 17 and 17 and is provided on both sides of the mass member by vulcanization molding. The elastic members 74 and 74 are connected and integrated with the cut and raised pieces 17 and 17.

  Also in this connecting rod, the mass member 6 can be accurately attached to the rod main body 14 at a predetermined position by vulcanization molding of the rubber-like elastic bodies 74 and 74. Moreover, the mass member 6 is in the opening 16 of the central plate portion 15 of the rod body 14 having a substantially U-shaped cross section, and does not protrude outward from the rod body 14. In addition, since the mass member 6 can resonate with the vibration of the object to be supported in the opening 16, the vibration absorbing action as a dynamic damper is effectively achieved.

  The connecting rod of each of the embodiments described above is a part of the unit in order to suppress movement or vibration of the engine unit in the roll direction when an engine unit including a transmission or the like is incorporated in a vehicle body and supported by a vibration isolation mount. Used as a torque rod to connect the part to the car body. In this use, the mass member 6 resonates by the spring action of the rubber-like elastic bodies 7, 72, 73, 74 with respect to the vibration of the object to be supported by the connecting rod, thereby achieving a good vibration absorbing action as a dynamic damper. be able to.

  Further, the mass member 6 for adjusting the mass is large or does not protrude at all from the rod body, so that the mass member does not get in the way and it is not necessary to secure an extra space in the engine room. , Mounting and assembly can be improved.

It is a top view which shows 1st Example of the connecting rod of this invention. It is a longitudinal cross-sectional view of a connecting rod same as the above. It is sectional drawing of the X1-X1 line | wire of FIG. 1 of a connecting rod same as the above. It is sectional drawing at the time of changing the shape of a mass member. It is a top view which shows 2nd Example of the connecting rod of this invention. It is sectional drawing of the X2-X2 line of the previous figure. It is sectional drawing similar to the previous figure which shows the 3rd Example of the connecting rod of this invention. It is a top view which shows 4th Example of the connecting rod of this invention. It is sectional drawing of the X3-X3 line of the previous figure. It is sectional drawing of the X4-X4 line | wire of the same figure. It is a top view of the conventional connection rod.

Explanation of symbols

  1 ... Rod body, 6 ... Mass member, 7 ... Rubber elastic body

Claims (9)

A connection comprising a rod body, a cylinder for holding a bush connected to both ends of the rod body, an anti-vibration bush with an inner cylinder installed in both cylinders, and a mass member attached to the rod body A rod,
The mass member has a substantially ring shape surrounding the outer portion of the rod body, is arranged substantially concentrically with the rod body, and is connected to the rod body via a rubber-like elastic body that is vulcanized and bonded to both. A connecting rod characterized by comprising 2. The mass member has a split ring shape in which a part is cut out larger than an outer diameter of the rod, and is arranged outside the rod body from the notch portion and continuously provided by a rubber-like elastic body. The connecting rod described in 1. The connecting rod according to claim 2, wherein the mass member has a substantially quadrangular shape and has a split ring shape with one side cut out. The connecting rod according to claim 1, wherein the mass member is connected to the rod body by a rubber-like elastic body provided with the rod body interposed therebetween. A connection comprising a rod body, a cylinder for holding a bush connected to both ends of the rod body, an anti-vibration bush with an inner cylinder installed in both cylinders, and a mass member attached to the rod body A rod,
The rod body is composed of two rod plates arranged in parallel, and the mass member is disposed at an intermediate position between the two plates, and is vulcanized and bonded to both the mass member and the two plates. A connecting rod characterized by being connected through a rubber-like elastic body. A connection comprising a rod body, a cylinder for holding a bush connected to both ends of the rod body, an anti-vibration bush with an inner cylinder installed in both cylinders, and a mass member attached to the rod body A rod,
The rod main body has a substantially U-shaped cross section, and the mass member is arranged inside the rod main body, and is continuously provided via a rubber-like elastic body that is vulcanized and bonded to both the mass member and the rod main body. A connecting rod characterized by being made. The connecting rod according to claim 6, wherein the mass member is connected to both side plate portions of a rod main body having a substantially U-shaped cross section by rubber-like elastic bodies provided on both sides thereof. A connection comprising a rod body, a cylinder for holding a bush connected to both ends of the rod body, an anti-vibration bush with an inner cylinder installed in both cylinders, and a mass member attached to the rod body A rod,
The rod main body has an angular U-shaped cross section, and a square opening is provided in the central plate portion thereof, and the mass member is disposed inside the opening, and both the mass member and the rod main body are provided. A connecting rod comprising a rubber-like elastic body vulcanized and bonded to the connecting rod. A rubber-like elastic body in which inwardly raised and raised pieces are provided opposite to each other in the opening of the rod body, and the mass member is disposed between the two raised and raised pieces and provided on both sides thereof The connecting rod according to claim 8, wherein the connecting rod is continuous with the both raised and raised pieces.

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