JPH04132241U - Anti-vibration propeller shaft - Google Patents

Abstract

(57) [Summary] [Purpose] The elastic body for vibration isolation that is press-fitted between the outer cylinder and the inner cylinder is divided into soft rubber and hard rubber. The vibration-proof propeller shaft is designed to reduce the whirring noise of the differential, and at high loads, suppress the torsional angle of the propeller shaft through an elastic body made of soft and hard rubber, improving its strength. There is something to be gained. [Structure] A vibration-proof propeller shaft in which rotational force is transmitted through a vibration-proof elastic body press-fitted between an outer cylinder 2 and an inner cylinder 3 of a propeller shaft 1. The elastic body is divided into an elastic body 4 made of soft rubber and an elastic body 5 made of hard rubber, and the elastic body 5 made of hard rubber is divided into two in the length direction by approximately semi-cylindrical elastic members 5a and 5b. At the same time, one semi-cylindrical elastic member 5a is baked and fixed to the outer diameter part of the inner cylinder 3, and the other semi-cylindrical elastic member 5b is baked and fixed to the inner diameter part of the outer cylinder 2. It is something to do.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to a vibration-proof propeller shaft used for power transmission in automobiles. It is something.

0002

[Conventional technology]

Conventionally, various proposals have been made for the structure of this type of propeller shaft, such as: As shown in Utility Model Application Publication No. 184126/1984 and Publication No. 99722/1999, etc. Such prior art is known.

0003 That is, in the conventional vibration-proof propeller shaft structure, as shown in FIG. An elastic body made of anti-vibration rubber or the like between the outer cylinder 11 and the inner cylinder 12 of the propeller shaft 10 13 is press-fitted, and the rotational force between both cylinders is transmitted through the universal joint 14. A configuration in which the signal is transmitted to the differential 15 is common.

0004

[Problem that the idea aims to solve]

However, with the vibration-proof propeller shaft of the conventional structure mentioned above, In order to suppress the torsional angle of the propeller shaft and obtain the specified strength, 11 and the inner cylinder 12, an elastic body 13 such as anti-vibration rubber has a relatively high hardness. Since it is molded from hard rubber, it provides sufficient vibration isolation performance under light loads. There was a problem that it could not be done.

[0005] The purpose of this invention is to solve the above-mentioned conventional problems by applying pressure between the outer cylinder and the inner cylinder. The elastic material used for vibration isolation is divided into soft rubber and hard rubber. The soft rubber elastic body reduces differential whine noise and also reduces noise during high loads. The torsional angle of the propeller shaft is suppressed through an elastic body made of soft rubber and hard rubber. Obtain an anti-vibration propeller shaft that can reduce vibration and improve strength. It is in.

[0006]

[Means to solve the problem]

In order to achieve this purpose, the present invention has developed an outer cylinder and an inner cylinder of a propeller shaft. A vibration-proof propeller in which rotational force is transmitted through a vibration-proof elastic body press-fitted between the In the shaft, the elastic body for vibration isolation is composed of a soft rubber elastic body and a hard rubber elastic body. The elastic body made of hard rubber is divided into two in the length direction. one semi-cylindrical elastic member; is baked and fixed to the outer diameter of the inner cylinder, and the other semi-cylindrical elastic member is attached to the inner diameter of the outer cylinder. It is characterized by being fixed by baking.

[0007]

[Effect]

Based on this configuration, the present invention utilizes rotational force from a transmission, etc. is transmitted from the outer cylinder of the propeller shaft to the inner cylinder via the vibration-isolating elastic body. This is transmitted to the rear differential, etc., and the torsion caused by the relative rotation between the outer cylinder and the inner cylinder is When the angle is smaller than the specified value and the load is light, the rotational force transmitted to the outer cylinder of the propeller shaft is transmitted to the inner cylinder through the elastic body made of soft rubber, but the relative relationship between the outer cylinder and the inner cylinder When the load is high, the twist angle due to rotation is larger than the specified value, use an elastic body made of hard rubber. The clearance between the roughly semi-cylindrical elastic members divided into two in the length direction has become 0. Sometimes it is transmitted to the inner cylinder.

[0008]

【Example】

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0009] FIG. 1 is a cross-sectional view of the main parts of a vibration-proof propeller shaft according to the present invention. 1, numeral 1 is a vibration-proof propeller shaft, and 2 is an outer part of the propeller shaft 1. Cylinder 3 is an inner cylinder. Between the inner diameter part of the outer cylinder 2 and the outer diameter part of the inner cylinder 3 that constitute the propeller shaft 1 , a predetermined gap d is formed and a length l is inserted. and In the gap d between the outer cylinder 2 and the inner cylinder 3, there is a vibration-proof material made of soft rubber with relatively hardness. An elastic body 4 of It is press-fitted in two rows along the line.

0010 As shown in FIG. 2, the vibration-proof elastic body 4 made of soft rubber is and the outer diameter part of the inner cylinder 3 by press fitting. In addition, the above hard As shown in FIG. 3, the elastic body 5 for vibration isolation made of rubber is divided into two in the length direction. The inner diameter of one of the elastic members 5a is It is fixed to the outer diameter part of the inner cylinder 3 by baking or the like, and the outer diameter of the other elastic member 5b is fixed. The diameter is fixed to the inner diameter part of the outer cylinder 2 by baking or the like. and the elastic member 5 Between a and 5b, there is a torsion angle θ due to the relative rotation between the outer cylinder 2 and the inner cylinder 3. A clearance δ is provided, and the relative rotation between the outer cylinder 2 and the inner cylinder 3 causes cleaning. When the balance δ becomes 0, the rotational force of the outer cylinder 2 is transmitted to the inner cylinder 3 via the elastic body 5. It is now possible to

[0011] Based on the above configuration, according to the present invention, the outer cylinder 2 of the propeller shaft 1 The vibration-proof elastic body press-fitted between the inner cylinder 3 and the elastic body 4 made of soft rubber and the hard rubber The elastic body 5 made of hard rubber is divided into an elastic body 5 made of hard rubber, and the elastic body 5 made of hard rubber is It is formed by substantially semi-cylindrical elastic members 5a and 5b divided into two, and one The semi-cylindrical elastic member 5a is baked and fixed to the outer diameter part of the inner cylinder 3, and the other semi-cylindrical elastic member 5a is By baking and fixing the elastic member 5b to the inner diameter part of the outer cylinder 2, for example, The rotational force from the transmission, etc. is transferred from the outer cylinder 2 of the propeller shaft 1 to a vibration-proofing bullet. It is transmitted to the inner cylinder 3 via the elastic body 4 or the elastic bodies 4 and 5, and from this it is transmitted to the rear differential. etc. Here, as shown in FIG. 4, the relationship between the outer cylinder 2 and the inner cylinder 3 is When the torsion angle θ due to rotation is smaller than a predetermined value, the propeller shaft 1 The rotational force transmitted to the outer cylinder 2 is transmitted to the inner cylinder 3 via the elastic body 4 made of soft rubber. However, when the torsion angle θ is higher than a predetermined value and the load is high, the relative relationship between the outer cylinder 2 and the inner cylinder 3 Due to the rotation, the clearance δ between the elastic bodies 5a and 5b made of hard rubber became 0. At times, it is transmitted to the inner cylinder 3.

0012

[Effect of the idea]

As explained above, according to the vibration-proof propeller shaft according to the present invention, the propeller shaft The elastic body for vibration isolation that is press-fitted between the outer cylinder and inner cylinder of the Rashaft is made of soft and hard materials. By dividing into hardness and hardness, it reduces the whining sound of the differential during light loads. At the same time, it suppresses the torsion angle of the propeller shaft under high loads and improves its strength. It is possible to improve the

[Brief explanation of drawings]

[Fig. 1] A sectional view of the main parts showing the vibration-proof propeller shaft according to the present invention

[Figure 2] Cross-sectional view taken along line 2-2 in Figure 1

[Figure 3] Cross-sectional view taken along line 3-3 in Figure 1

[Fig. 4] Explanatory diagram showing the torsional rigidity of the vibration-proof propeller shaft according to the present invention

[Figure 5] Cross-sectional view of main parts showing a vibration-proof propeller shaft with conventional structure

[Explanation of symbols]

1 propeller shaft 2 Outer cylinder 3 Inner cylinder 4 Elastic body 5 Elastic body 5a Elastic member 5b Elastic member

Claims (1)

[Scope of utility model registration request] 1. A vibration-isolating propeller shaft in which rotational force is transmitted through a vibration-isolating elastic body press-fitted between an outer cylinder and an inner cylinder of the propeller shaft, wherein the vibration-isolating elastic body The body is divided into an elastic body made of soft rubber and an elastic body made of hard rubber. A vibration-proof propeller shaft characterized in that a cylindrical elastic member is baked and fixed to the outer diameter part of an inner cylinder, and the other semi-cylindrical elastic member is baked and fixed to the inner diameter part of the outer cylinder.