JPH07208553A - Damper and manufacture thereof - Google Patents

Abstract

PURPOSE:To provide a damper with the excellent productivity and manufacturing method therefor by removing the adhesion structure from a bush type torsional damper and eliminating the adhesion process from the manufacturing process. CONSTITUTION:An elastic body 2 is set in a noncontact state, as damper (product), for a sleeve 1 and a mass body 2, and the turning stop members 5 and 6 are installed between the sleeve 1 and the elastic body 3 and between the elastic body 3 and the mass body 2. Further, in the manufacture of the damper, the turning stop parts 1a and 2a are formed on the sleeve 1 and the mass body 2, and the elastic body 3 is vulcanization-molded in the noncontact state, between the sleeve 1 and the mass body 2, and in this vulcanization molding, the elastic body 3 is engaged with the turning stop parts 1a and 2a, and the sleeve 1 is fitted with a hub 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a damper and a method of manufacturing the damper, and more particularly, to a damper mounted on a rotary drive system of an automobile engine or the like to absorb and suppress vibration generated on a rotary shaft of a crankshaft or the like. The present invention relates to a torsional damper and its manufacturing method.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 5, a bush type torsional damper is known in which a sleeve a and a mass body b are connected via an elastic body c, and the sleeve a is fitted to a hub d. Has been.

The damper is manufactured by the following procedure. That is, as shown in FIG. 6, first, the elastic body c is vulcanization molded between the sleeve a and the mass body b, and at the same time as the vulcanization molding, the elastic body c is vulcanized and molded.
After vulcanization and adhesion, the sleeve a is fitted on the hub d as shown by the arrow after this molding and adhesion are completed.

In the above damper, the elastic body c is vulcanized and bonded to the sleeve a and the mass body b by preventing the sleeve a and the elastic body c and the elastic body c and the mass body b from rotating relative to each other. However, because of this bonding step, it takes a lot of time and labor to manufacture the damper. Note that this bonding step includes a pretreatment step of performing shot processing on the bonding surfaces of the sleeve a and the mass body b, a step of applying an adhesive to the bonding surfaces, and the like.

[0005]

In view of the above points, the present invention eliminates the bonding structure from the bush type torsional damper, and eliminates the bonding step from the manufacturing process thereof, and thus the damper having excellent productivity and the manufacturing thereof. The purpose is to provide a method.

[0006]

To achieve the above object, the present invention provides a damper comprising a sleeve and a mass body connected to each other through an elastic body, and the sleeve fitted to a hub. Provided is a damper, which is not adhered to the sleeve and the mass body, and is provided with a detent between the sleeve and the elastic body and between the elastic body and the mass body. ). Further, a detent portion is provided on the sleeve and the mass body, the elastic body is vulcanized and molded between the sleeve and the mass body without being adhered, and the elastic body is engaged with the detent portion during the vulcanization molding. And a method for manufacturing a damper in which the sleeve is fitted to a hub (claim 2).

[0007]

If the detents are provided between the sleeve and the elastic body and between the elastic body and the mass body, it is possible to fix the elastic body and the mass body to each other without adhering them to each other. Therefore, it is possible to eliminate the adhesive structure from the bush type torsional damper and eliminate the adhesive step from the manufacturing process.

[0008]

Embodiments of the present invention will now be described with reference to the drawings.

As shown in FIG. 1, a sleeve 1 and a mass body 2 are provided.
Are connected via the elastic body 3, the sleeve 1 is fitted to the hub 4, and the elastic body 3 is not adhered to the sleeve 1 and the mass body 2, respectively. Rotation stoppers 5 and 6 are provided in the space and between the elastic body 3 and the mass body 2, respectively. The sleeve 1, the mass body 2, and the hub 4 are each formed of a predetermined metal into an annular shape, and the elastic body 3 is formed of a rubber-like elastic material into an annular shape. The rotation stoppers 5 and 6 are respectively the elastic body contact surface (outer peripheral surface) of the sleeve 1 or the elastic body contact surface (inner peripheral surface) of the mass body 2.
As shown in FIG. 2, a large number of spiral groove-shaped recesses 1a, 2
a, and on the sleeve contact surface (inner peripheral surface) or mass body contact surface (outer peripheral surface) of the elastic body 3, a large number of spiral convex portions 3a and 3b are provided in accordance with the concave portions 1a and 2a. The concave portions 1a, 2a and the convex portions 3a, 3b in the circumferential direction (rotational direction)
Is engaged with.

The damper having the above structure is manufactured by the following procedure. That is, first, on the elastic body contact surface (outer peripheral surface) of the sleeve 1 and the elastic body contact surface (inner peripheral surface) of the mass body 2 as spiral stoppers shown in FIG. 2a is provided. The cutting method is used. Next, the sleeve 1 and the mass body 2 are concentrically combined to vulcanize and form the elastic body 3 between the sleeve 1 and the mass body 2 in a non-bonded manner, and the vulcanization molding allows the elastic body 3 to contact the sleeve. Spiral convex portions 3a and 3b are formed on the surface (inner peripheral surface) and the mass body contact surface (outer peripheral surface), respectively.
The elastic body 3 is formed in a state of biting into the recesses 1a and 2a, that is, the protrusions 3a and 3b are formed in the recesses 1a and 2a, and at the same time when the recesses 1a and 2a are formed, It will be in the engaged state. Next, the sleeve 1 is fitted on the hub 4 with a predetermined tightening margin.

Although the damper having the above construction is a bush type torsional damper, it does not have an adhesive structure, and the manufacturing method of the above construction is a bush type torsional damper manufacturing method. Since the sleeve 1 and the elastic body 3 or the elastic body 3 and the mass body 2 do not rotate relative to each other because they do not have them and nevertheless have the detents 5 and 6, in this respect It has the same performance as the example. Therefore, the bonding process including the pretreatment process and the adhesive applying process can be omitted at the time of manufacturing or at the time of carrying out the process, and the productivity of the damper can be improved accordingly.

In the present invention, the structure of the detents 5 and 6 and the shape of the detent part should be such that the sleeve 1 and the elastic body 3 or the elastic body 3 and the mass body 2 can be engaged with each other in the circumferential direction. However, there is no particular limitation. The following is an example.

As shown in FIGS. 3 and 4, on the elastic body contact surface of the sleeve 1 or the elastic body contact surface of the mass body 2,
A large number of convex portions 1b and 2b are provided as rotation preventing portions, and the concave portions 3c and 3d of the elastic body 3 are engaged with the respective convex portions 1b and 2b. When the sleeve 1 or the mass body 2 is a plate material (sheet metal or the like) that is formed by pressing, providing the protrusions 1b and 2b in this way causes the backs of the protrusions 1b and 2b to be recessed (see FIG. Then only sleeve 1 is so). The sleeve 1 or the mass body 2 is provided with a large number of holes (not shown) penetrating in the thickness direction (radial direction) thereof, and the elastic body 3 is engaged with each hole.

When the sleeve 1 or the mass body 2 is formed by casting or forging, it is possible to form a recess or a hole in these by a mold.

[0015]

The present invention has the following effects. That is, in common with claim 1 and claim 2, while eliminating the adhesive structure from the bush type torsional damper,
Since the bonding process can be eliminated from the manufacturing process, the productivity of the damper can be improved accordingly. Further, instead of bonding, since rotation stoppers are respectively provided between the sleeve and the elastic body and between the elastic body and the mass body, it is possible to prevent relative rotation between the sleeve and the elastic body or the elastic body and the mass body. In this respect, it is possible to provide a damper having the same performance as the conventional technology.

[Brief description of drawings]

FIG. 1 is a half sectional view of a damper according to an embodiment of the present invention.

FIG. 2 is a perspective view in which a sleeve and a mass body of the damper are partially cut away.

FIG. 3 is a half cutaway view of a damper according to another embodiment of the present invention.

FIG. 4 is a perspective view in which a sleeve and a mass body of the damper are partially cut away.

FIG. 5 is a half-cut sectional view of a damper according to a conventional example.

FIG. 6 is a half sectional view showing a manufacturing procedure of the damper.

[Explanation of symbols]

 1 sleeve 1a, 2a, 3c, 3d concave part 1b, 2b, 3a, 3b convex part 2 mass body 3 elastic body 4 hub 5, 6 rotation stopper

Claims (2)

[Claims] 1. A damper comprising a sleeve (1) and a mass body (2) connected to each other via an elastic body (3), and the sleeve (1) fitted to a hub (4). 3) is made non-adhesive to the sleeve (1) and the mass body (2), and between the sleeve (1) and the elastic body (3) and between the elastic body (3) and the mass body (2).
A damper characterized in that detents (5) and (6) are provided between the dampers. 2. The sleeve (1) and the mass body (2) are provided with anti-rotation portions (1a) (2a) (1b) (2b), and elastic between the sleeve (1) and the mass body (2). The body (3) is vulcanized and molded in a non-bonded state, and the elastic body (3) is fixed to the detent portions (1a) (2a) during the vulcanization and molding.
(1b) A method for manufacturing a damper that engages with (2b) and fits the sleeve (1) onto the hub (4).