JP2006189096A - Torque rod - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a torque rod capable of surely preventing a rubber bush part from slipping off from a bush receiving part and improving the durability of a rubber elastic body although the rod has a structure realizing reduction in weight. <P>SOLUTION: The torque rod comprises a rod part 1 having hole-like bush receiving parts 2, 3 respectively provided in both ends 1A, 1B in the longitudinal direction and a pair of rubber bush parts 3, 4. The rubber bush parts 3, 4 are composed of inner cylinders 6, 16, outer cylinders 6, 16 and rubber elastic bodies 8, 18 vulcanized and molded between the outer and inner cylinders so as to connect the inner cylinders 6, 16 and the outer cylinders 6, 16. The rod part 1 and the outer cylinder 7 of at least one of the rubber bush parts 2 are formed of a resin material. The outer cylinder 7 having the rubber elastic body 8 vulcanized and molded between the inner cylinder 6 and the outer cylinder 7 is welded to and connected with the bush receiving part 2 into which the outer cylinder 7 is fitted. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention
It consists of a rod part each provided with a hole-like bush receiving part at both ends in the longitudinal direction and a pair of rubber bush parts that are individually fitted to the pair of bush receiving parts, and the rubber bush part and the inner cylinder A torque rod composed of an outer cylinder and a rubber-like elastic body that is vulcanized and formed between the inner and outer cylinders to connect the inner cylinder and the outer cylinder;
as well as,
It consists of a rod part provided with a hole-like bush receiving part at both ends in the longitudinal direction, and a pair of rubber bush parts fitted separately to the pair of bush receiving parts, one rubber bush part being an inner cylinder An outer cylinder and a rubber-like elastic body that is vulcanized and connected between the inner and outer cylinders to connect the inner cylinder and the outer cylinder, and the other rubber bush portion is formed on the inner cylinder and the outer periphery of the inner cylinder. The present invention relates to a torque rod composed of a vulcanized rubber-like elastic body.

The torque rod is interposed between, for example, an automobile engine and a vehicle body to absorb vibration caused by engine torque fluctuations. In recent years, there has been a strong demand for weight reduction of automobiles, and there has been a technique of forming a torque rod with a resin material as means for reducing the weight (see Patent Document 1). In this torque rod, the rod portion is formed of a resin material, and a rubber-like elastic body that is vulcanized and bonded to the outer peripheral surface of the inner cylinder is press-fitted into the bush receiving portion of the rod portion. In addition to this structure, there is also a structure in which an outer cylinder made of a resin material obtained by vulcanizing and molding a rubber-like elastic body is press-fitted into the bush receiving portion.
JP-A-6-109075

  The above torque rod is arranged around the engine, and the rubber-like elastic body press-fitted into the bush receiving part and the outer cylinder made of the resin material press-fitted into the bush receiving part are easily deteriorated by heat from the engine. Therefore, in a structure in which a rubber-like elastic body or a resin outer cylinder is simply press-fitted into the bush receiving part of the rod part as in the conventional structure, the deteriorated outer cylinder or the like tends to come out of the bush receiving part. There was room for improvement.

  Although it is conceivable to vulcanize and bond the rubber-like elastic body to the inner peripheral surface of the bush receiving portion without providing an outer cylinder, this structure makes it impossible to pre-compress the rubber-like elastic body. The durability of the elastic body tends to decrease.

  The present invention has been made in view of the above-mentioned actual situation, and its purpose is to reliably prevent the rubber bush portion from coming off from the bush receiving portion while being a structure capable of reducing the weight. The object is to provide a torque rod capable of improving the durability of the rubber-like elastic body.

The feature of the first invention is
It consists of a rod part provided with a hole-like bush receiving part at both ends in the longitudinal direction, and a pair of rubber bush parts fitted separately to the pair of bush receiving parts, the rubber bush part being an inner cylinder, A torque rod composed of an outer cylinder and a rubber-like elastic body that is vulcanized and connected between the inner and outer cylinders and connects the inner cylinder and the outer cylinder,
The rod part and the outer cylinder of at least one rubber bush part are formed of a resin material,
An outer cylinder made of the resin material and formed by vulcanization molding of the rubber-like elastic body between the inner cylinder and the bush receiving portion fitted with the outer cylinder is joined by welding. is there.

  According to this configuration, since the rod portion and the outer cylinder of at least one rubber bush portion are formed of the resin material, an increase in the weight of the torque rod can be suppressed. The outer cylinder made of the resin material and formed by vulcanizing a rubber-like elastic body between the inner cylinder and the bush receiving portion fitted with the outer cylinder are joined by welding. Even if the cylinder is deteriorated by the heat from the engine, it is possible to make it difficult to remove the deteriorated outer cylinder from the bush receiving portion. Further, since the rubber-like elastic body is vulcanized between the inner cylinder and the outer cylinder before the outer cylinder is fitted into the bush receiving part, the rubber bush part can be pre-compressed.

The feature of the second invention is:
It consists of a rod part provided with a hole-like bush receiving part at both ends in the longitudinal direction, and a pair of rubber bush parts fitted separately to the pair of bush receiving parts, one rubber bush part being an inner cylinder An outer cylinder and a rubber-like elastic body that is vulcanized and connected between the inner and outer cylinders to connect the inner cylinder and the outer cylinder, and the other rubber bush portion is formed on the inner cylinder and the outer periphery of the inner cylinder. A torque rod composed of a vulcanized rubber-like elastic body,
The rod part and the outer cylinder of the one rubber bush part are formed of a resin material,
An outer cylinder made of the resin material and formed by vulcanization molding of the rubber-like elastic body between the inner cylinder and the bush receiving portion fitted with the outer cylinder is joined by welding. is there.

  According to this structure, since the rod part and the outer cylinder of one rubber bush part are formed with the resin material, the increase in the weight of a torque rod can be suppressed. Since the outer cylinder made of a resin material and formed by vulcanizing a rubber-like elastic body between the inner cylinder and the bush receiving portion into which the outer cylinder is fitted is joined by welding, the outer cylinder However, even if it deteriorates due to heat from the engine, it is possible to make it difficult for the deteriorated outer cylinder to come out of the bush receiving portion. Furthermore, since the rubber-like elastic body is vulcanized between the inner cylinder and the outer cylinder before the outer cylinder is fitted into the bush receiving part, the rubber bush part can be pre-compressed.

  An outer cylinder made of the resin material and formed by vulcanization molding of the rubber-like elastic body and the bush receiving portion fitted with the outer cylinder are joined to each other by ultrasonic welding. And the said outer cylinder and a bush receiving part can be joined reliably.

  At least one of the outer peripheral surface of the outer cylinder made of the resin material and the inner peripheral surface of the bush receiving portion to which the outer cylinder is fitted, the axial direction of the outer cylinder or the axial direction of the bush receiving portion Are distributed over the entire circumference of the outer peripheral surface of the outer cylinder or the entire inner peripheral surface of the bush receiving part, the ribs are melted during welding and the outer cylinder and the bush receiving part. And can be joined.

  According to the first and second aspects of the present invention, the rubber bush portion can be reliably prevented from coming off from the bush receiving portion while the structure can be reduced in weight, and the durability of the rubber-like elastic body can be prevented. It was possible to provide a torque rod capable of improving the performance.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 4 show a torque rod that is interposed between an automobile engine and a vehicle body and absorbs vibrations from the engine. This torque rod includes a rod portion 1 having a first bush receiving portion 2 having a large-diameter hole and a second bush receiving portion 3 having a small-diameter hole at both longitudinal ends 1A and 1B, and a first bush receiving It consists of a first rubber bush part 4 fitted to the part 2 and a second rubber bush part 5 fitted to the second bush receiving part 3.

  The first rubber bushing 4 is vulcanized and molded between a metal inner cylinder 6, an outer cylinder 7 made of a resin material such as PA 6 (polyamide (nylon)), and inner and outer cylinders 6, 7. 6 and a rubber-like elastic body 8 connecting the outer cylinder 7. A plurality of straight holes 9 are formed in the rubber-like elastic body 8, and eight ribs 20 along the axial direction of the outer cylinder 7 are formed on the outer peripheral surface 7 </ b> A of the outer cylinder 7. Distributed over the entire circumference. The inner cylinder 6 of the first rubber bush portion 4 is connected to the vehicle body side through a connecting bolt.

  The second rubber bush portion 5 includes a metal inner cylinder 16, a metal outer cylinder 17, and a rubber-like elastic body that is vulcanized and formed between the inner and outer cylinders 16 and 17 to connect the inner cylinder 16 and the outer cylinder 17. 18 and. The second rubber bush portion 5 is connected to the engine side through a connecting bolt.

The rod portion 1 is formed of a resin material such as PA6, and the outer cylinder 7 in which a rubber-like elastic body 8 is vulcanized and molded between the inner cylinder 6 and the outer cylinder 7 is fitted. 1 Bush receiving part 2 is joined by ultrasonic welding. Ultrasonic welding is performed by using an ultrasonic welding apparatus equipped with an ultrasonic vibrator, and eight portions of the fitted outer cylinder 7 and the first bush receiving portion 2 (where eight ribs 20 are provided). ) The rib 20 is melted by this ultrasonic welding, and the outer cylinder 7 and the first bush receiving portion 2 are welded.
[Another embodiment]

(1) The plurality of ribs 20 may also be formed on the inner peripheral surface 2A of the first bush receiving portion 2. Further, the plurality of ribs 20 may be formed only on the inner peripheral surface 2 </ b> A side of the first bush receiving portion 2 without being provided on the outer peripheral surface 7 </ b> A of the outer cylinder 7.

(2) The outer cylinder 17 in which the outer cylinder 17 of the second rubber bush portion 5 is formed of a resin material such as PA6, and the rubber-like elastic body 18 is vulcanized between the outer cylinder 17 and the outer cylinder 17 You may join the 2nd bush receiving part 3 with which the pipe | tube 17 was fitted by ultrasonic welding. In this case, the plurality of ribs 20 may be provided on at least one of the inner peripheral surface 3A of the second bush receiving portion 3 and the outer peripheral surface 17A of the outer cylinder 17.

(3) In the first embodiment and the above-described embodiments (1) and (2), the pair of rubber bush portions (the first rubber bush portion 4 and the second rubber bush portion 5) are connected to the inner cylinder (6, 6). 16), outer cylinders (7, 17), rubber-like elastic bodies (8, 18) which are vulcanized between the inner and outer cylinders and connect the inner cylinders (6, 16) and the outer cylinders (7, 17). Instead of this structure, either rubber bush part is replaced with an inner cylinder, an outer cylinder made of a resin material, and a rubber-like shape that is vulcanized between the inner and outer cylinders to connect the inner cylinder and the outer cylinder. A torque rod (that is, the other rubber bushing portion) that is constituted by an elastic body and the other rubber bushing portion is constituted by an inner cylinder and a rubber-like elastic body vulcanized and formed on the outer peripheral portion of the inner cylinder. Torque rod that does not have an outer cylinder, and the rubber-like elastic body of the other rubber bush part is directly press-fitted into the bush receiving part) It is also possible to apply the present invention.

  The resin material may be a resin material other than PA6. For example, engineering plastics such as PA66 (polyamide (nylon)), PPS (polyphenylene sulfide), and PPA (polyphthalamide) may be used.

Front view of torque rod Torque rod side view Torque rod perspective view Disassembled perspective view of torque rod

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Rod part, 1A, 1B ... Both ends, 2 ... 1st bush receiving part (bush receiving part), 2A, 3A ... Inner peripheral surface of bush receiving part, 3 ... 2nd bush receiving part ( Bush receiving part), 4 ... 1st rubber bush part (rubber bush part), 5 ... 2nd rubber bush part (rubber bush part), 6, 16 ... Inner cylinder, 7, 17 ... Outer cylinder, 7A , 17A ... inner peripheral surface of outer cylinder, 8, 18 ... rubber-like elastic body, 20 ... rib

Claims (4)

It consists of a rod part provided with a hole-like bush receiving part at both ends in the longitudinal direction, and a pair of rubber bush parts fitted separately to the pair of bush receiving parts, the rubber bush part being an inner cylinder, A torque rod composed of an outer cylinder and a rubber-like elastic body that is vulcanized and connected between the inner and outer cylinders and connects the inner cylinder and the outer cylinder,
The rod part and the outer cylinder of at least one rubber bush part are formed of a resin material,
A torque rod made of the resin material, in which the rubber-like elastic body is vulcanized and formed between the inner cylinder and the bush receiving portion in which the outer cylinder is fitted is joined by welding. . It consists of a rod part provided with a hole-like bush receiving part at both ends in the longitudinal direction, and a pair of rubber bush parts fitted separately to the pair of bush receiving parts, one rubber bush part being an inner cylinder An outer cylinder and a rubber-like elastic body that is vulcanized and connected between the inner and outer cylinders to connect the inner cylinder and the outer cylinder, and the other rubber bush portion is formed on the inner cylinder and the outer periphery of the inner cylinder. A torque rod composed of a vulcanized rubber-like elastic body,
The rod part and the outer cylinder of the one rubber bush part are formed of a resin material,
A torque rod made of the resin material, in which the rubber-like elastic body is vulcanized and formed between the inner cylinder and the bush receiving portion in which the outer cylinder is fitted is joined by welding. .   An outer cylinder made of the resin material and formed by vulcanization molding of the rubber-like elastic body and the bush receiving portion fitted with the outer cylinder are joined to each other by ultrasonic welding. The torque rod according to claim 1 or 2.   At least one of the outer peripheral surface of the outer cylinder made of the resin material and the inner peripheral surface of the bush receiving portion to which the outer cylinder is fitted, the axial direction of the outer cylinder or the axial direction of the bush receiving portion The torque rod according to any one of claims 1 to 3, wherein a plurality of ribs along the outer circumference of the outer cylinder are distributed over the entire circumference of the outer cylinder or the inner circumference of the bush receiving portion.

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