JPS6240171Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a clutch suitable for use in an automobile.

Conventionally, this kind of clutch is shown in Fig. 1 and Fig. 2.
There is one with the structure shown in the figure (Tokuko Sho 41-12683
issue).

1 and 2, the clutch mainly includes a boss portion 21 and a friction lining 22.
It is composed of a disk portion 23 having a diameter and a torsional vibration stopper made of a rubber-like elastic material disposed between the disk portions 23 and 23. The torsional vibration stopper is composed of four bush-shaped rubber rings 24 and 25, each of which is arranged concentrically. The pair of inner rubber rings 24 include a pair of cylindrical first metal rings 26, 26 fixed on the outer peripheral surface of the boss portion 21, and a pair of cylindrical first metal rings 26, 26 having a larger diameter than the first metal ring 26. The metal ring 27 is disposed integrally with the second metal ring 27.
Further, the pair of outer rubber rings 25 are integrally arranged between the second metal ring 27 and a pair of third metal rings 28 having a cylindrical shape larger in diameter than the second metal ring 27. ing.

Furthermore, a plurality of braking protrusions 29 extend radially outward from approximately the center in the axial direction on the outer circumferential surface of the boss portion 21 . In such a configuration, when torsional vibration occurs and a certain amount of twist occurs in the first rubber ring 24, the braking protrusion 30 provided on the second metal ring 27 collides with the braking protrusion 29, thereby causing the first rubber ring 24 to twist. Further deformation of the first rubber ring 24 is prevented.
The second rubber ring 25 is then deformed until the brake pin 31, which is integrally fixed to the third metal ring 28, collides with the brake protrusion 29.

The clutch according to the prior art described above had the following problems.

As shown by the solid line in Figure 3, the clutch characteristics are such that the torsion angle _θ1 is relatively large compared to the torsion angle _θ3 , and the torsion angle _θ3 must be as large as possible until a constant torque _T2 is generated. However, the clutch according to the prior art cannot achieve the characteristics shown by the solid line in FIG. 3 unless the rubber material characteristics (hardness, material, etc.) of the first rubber ring 24 and the second rubber ring 25 are changed. I had a problem that I couldn't solve. That is, the first rubber ring 24 and the second rubber ring 25 are made of the same material, and the first rubber ring 24
If the characteristics of the second rubber ring 25 are made to match the characteristics up to the torsion angle θ ₁ shown by the solid line in Figure 3, the characteristics of the second rubber ring 25 become the characteristics shown by the broken line in Figure 3, and the torsion angle θ ₂ is larger than the torque T ₂ . This caused the problem that it could not be removed.

In the present invention, the ideal characteristics shown by the solid line in FIG. 3 can be obtained using materials having the same rubber material characteristics.

The basic concept of the present invention is to arrange a first rubber ring that is integrally fixed to both cylinders between two cylinders arranged concentrically with each other, and to connect the two cylinders as described above. A first flange portion integrally extending in the radial direction from a large-diameter cylindrical body disposed outwardly within the body, and a second flange portion disposed opposite the first flange portion. A second rubber ring integrally fixed to the side surfaces of both flange portions is disposed between them, and the first rubber ring with a small diameter produces twisting characteristics up to θ ₁ in FIG. 3, The second rubber ring located outward in the radial direction produces a twisting characteristic of θ ₁ or more in the figure.

The present invention fixes a first rubber ring arranged inwardly between two cylindrical bodies arranged concentrically, and fixes a second rubber ring arranged outwardly in the radial direction. Since it is spread out and fixed to two flange parts facing each other, the first
Even if the rubber ring and the second rubber ring are made of materials that exhibit the same rubber material characteristics, the torsional characteristics of the second rubber ring can be adjusted up to θ ₅ with respect to the torsion angle for torque T ₂ in Fig. 3. It can be set to a large value.

Furthermore, since the first rubber ring and the second rubber ring can be molded from the same material at the same time, manufacturing costs can be reduced.

An embodiment of this invention will be described below with reference to FIGS. 4 and 5.

In the embodiment shown in the figure, four brake protrusions 4 extend integrally from the axially intermediate portion of the cylindrical boss portion 1, and the brake protrusions 4 have four brake protrusions 4 located radially inward. A first braking surface 18 and a second braking surface 19 located radially outward and recessed toward the outside of the circumference from the first braking surface 18 are formed, and the braking protrusion 4
Two metal rings 11 are fixed to the boss part 1 with the metal rings 11 in between, and have a cylindrical part 2 and a first flange part 3 integrally extending from the cylindrical part 2, and have a substantially L-shaped cross-sectional shape. The two first plates 5 exhibiting the above-mentioned characteristics are arranged such that the cylindrical portion 2 is located outside the metal ring 11, and
The two first flange parts 3 are arranged to sandwich the brake protrusion 4, and the first brake pin 16 connecting both the first flange parts 3 faces the first stop surface 18. The second part is arranged in a substantially conical shape.
Two second plates 10 each have a flange portion 8 and a cylindrical portion 9 integrally extending from the second flange portion 8 and have a substantially F-shaped cross-sectional shape. The part 8 is arranged to face the first flange part 3, and one second plate 10
A friction lining 6 for transmitting torque is attached to the side surface of a disc portion 7 extending radially from a cylindrical portion 9, and a second braking pin 17 connecting both second plates 10 acts as a brake. Two first rubber rings 13 formed in a substantially cylindrical shape and arranged to face the second stop surface 19 of the protrusion 4 are connected to the cylindrical portion 2 of the first plate 5 and the metal ring 11. A second rubber ring 15 is disposed between and integrally fixed to both members, is made of the same material as the first rubber ring 13, and has a substantially trapezoidal cross-sectional shape.
It is arranged between the first flange part 3 and the second flange part 8 and is integrally fixed to both the flange parts 3 and 8.

In the embodiment described above, when torsional vibration is generated, elastic deformation occurs in the first rubber ring 13, relative rotation occurs between the boss portion 1 and the first plate 5, and the torsional angle between the two members increases. θ ₁ shown on Figure 3
When the first brake pin 16 reaches the first stop surface 18 to prevent excessive deformation of the first rubber ring 13, the second rubber ring 15 is elastically deformed and the first plate 5
When relative rotation is caused between the first and second plates 10 and the torsion angle further increases, the second brake pin 1
7 comes into contact with the second restraining surface 19 to prevent excessive deformation of the second rubber ring 15.

As described above, the clutch of the present invention includes two cylindrical bodies arranged concentrically with each other, and a first rubber ring that is integrally fixed to both cylindrical bodies, and a first rubber ring that is integrally fixed to both cylindrical bodies. Between a first flange part disposed outwardly within the cylindrical body and extending integrally in the radial direction from the cylindrical body, and a second flange part disposed opposite to the first flange part. By having a configuration in which the second rubber ring is integrally fixed to the side surface of both flanges, the shape and dimensions of the first rubber ring and the second rubber ring can be independently determined. Since each rubber ring can be set to maintain appropriate torsional characteristics, even when both rubber rings are made of the same material, the ideal characteristics shown by the solid line in Figure 3 can be maintained. is obtained.

In this embodiment, two rubber rings each are used, but one rubber ring each may be used.

[Brief explanation of the drawing]

1 and 2 are a sectional view and a side view of a clutch according to the prior art, FIG. 3 is a diagram showing torsional characteristics, and FIGS. 4 and 5 are a sectional view and a side view of a clutch according to the present invention. It is a diagram. DESCRIPTION OF SYMBOLS 1... Boss part, 2... Cylindrical part, 3... First flange part, 4... Braking protrusion part, 5... First plate, 6... Friction lining, 7... Disc part,
8... Second flange part, 9... Cylindrical part, 10...
...Second plate, 11...Metal ring, 13...
...First rubber ring, 15...Second rubber ring, 16...First brake pin, 17...Second brake pin, 18...First stop surface, 19...Second stop Surface, 21... Boss portion, 22... Friction lining, 23... Disc portion, 24... First rubber ring, 25... Second rubber ring, 26... First metal ring, 27... ...Second metal ring, 28...
...Third metal ring, 29...Brake protrusion, 30
...Brake protrusion, 31...Brake pin.

Claims (1)

[Scope of utility model registration request] radially extending from the first stop surface 18 and the first stop surface 18;
A cylindrical boss part 1 is integrally fixed with a second braking protrusion 4 formed with a second braking surface 19 located radially outwardly from the braking face 18 of a cylindrical portion 2 arranged therein, and a first flange portion 3 having a first brake pin 16 extending radially outward from the cylindrical portion 2 and facing the first stop surface 18. a first plate 5 having a second flange portion 8 disposed opposite the first flange portion 3; and a second plate 5 having a friction lining 6 affixed thereto and facing the second stop surface 19; a second plate 1 having a disc portion 7 fitted with a brake pin 17 and integrally fixed to the second flange portion 8;
0. A first rubber ring 13 and the first flange portion disposed between the boss portion 1 and the cylindrical portion 2 and integrally fixed to the boss portion 1 and the cylindrical portion 2; 3 and the second flange part 8, and is integrally fixed to the side surfaces of both the flange parts 3 and 8, and has a second rubber ring 15 made of the same material as the first rubber ring 13. Clutch.