JPH0735197A - Manufacture of damper - Google Patents

Abstract

PURPOSE:To reduce the time and labor necessary for operations by setting the positioning work of a mass body to be one time alone, in regard to a manufacturing process of a damper with plural pieces of this mass body. CONSTITUTION:This manufacture consists of three processes that 1) to form a mass body continuum 1 made up of integrally forming two mass bodies 2 and 3, 2) connect this mass body continuum 1 to a hub 5 via an elastic body 6, and 3) to divide this continuum 1 into two mass bodies 2 and 3, and positioning of each mass body to the hub ia defined to only one time in stages of the mass body continuum.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a damper that absorbs and damps vibrations generated in various rotary shafts such as crankshafts of automobile engines.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 5, two mass bodies (also referred to as vibrating rings) 11 and 12 are provided, and each of the mass bodies 11 and 12 is elastic body 1 with respect to a hub 13.
A double mass type torsional damper connected through 4, 15 is known, and this damper is manufactured by the following procedure.

That is, first, the two mass bodies 11 and 12 are
Each of the parts including is individually molded, and then, as shown in FIG. 6, the first mass body 11 is positioned in the axial direction and the radial direction with respect to the hub 13, and between the mass body 11 and the hub 13. The elastic body 14 is press-fitted from one side in the axial direction. Then, FIG.
As shown in, the second mass body 12 is positioned in the axial direction and the radial direction with respect to the hub 13, and the elastic body 15 is press-fitted between the mass body 12 and the hub 13 from the other axial direction. Reference numeral 16 in FIG. 6 and reference numeral 17 in FIG.
When press-fitting 4, 15 the mass bodies 11, 12 and the hub 13
Is a holding jig that supports these from the side opposite to the press-fit so that they do not move relative to each other in the axial direction.

[0004]

However, in the above-described conventional manufacturing method, the two mass bodies 11 and 12 must be respectively positioned with respect to the hub 13 sequentially and temporally before and after each other. Therefore, there is a problem that the work takes a lot of time and labor. The elastic body 14,
Since it is necessary to form two pieces 15 and press them respectively one after another and sequentially in time, and further press-fitting from the opposite side in the axial direction, there is a problem that the work takes a lot of time and labor.

[0005]

In view of the above points, the present invention has been devised with the object of solving the problems found in the above-mentioned prior art and reducing the labor and time required for the work. In order to achieve this object, as shown in claim 1, a step of molding a mass body continuous body in which a plurality of mass bodies are integrally molded, and the mass body continuous body with respect to the hub via an elastic body. A method for manufacturing a damper is provided that includes a step of connecting and a step of dividing the mass body continuum into a plurality of mass bodies. Further, as described in claim 2, a step of molding a mass body continuous body in which a plurality of mass bodies are integrally molded, and an axial length substantially the same as the mass body continuous body between the mass body continuous body and the hub. A step of press-fitting the elastic body of from one side in the axial direction,
And a step of dividing the mass body continuum into a plurality of mass bodies.

[0006]

According to the manufacturing method of the first aspect having the above steps, the positioning of the mass body with respect to the hub can be performed only once in the stage of the mass body continuous body.
According to the manufacturing method of claim 2 having the above steps, the positioning of the mass body with respect to the hub is performed only once in the stage of the mass body continuum, and then the elastic body is molded and press-fitted once. It is possible to do only work.

[0007]

EXAMPLE An example of the present invention will now be described with reference to the drawings. In this example, a double mass type torsional damper having two mass bodies 2 and 3 shown in FIG. 1 is manufactured. And has the following procedure.

That is, first, as shown in FIG. 2, a mass body continuous body 1 in which two mass bodies 2 and 3 are integrally molded is molded. The two mass bodies 2 and 3 are arranged side by side in the axial direction and integrated with each other, and are integrated with each other through an annular connecting portion (cutting portion) 4 which is scraped off by a cutting jig 8 at the time of division. .

Next, as shown in FIG. 3, the mass continuum 1 is positioned with respect to the hub 5 in the axial direction and the radial direction,
The elastic body 6 is press-fitted between the mass body continuous body 1 and the hub 5 from one side in the axial direction. The elastic body 6 has substantially the same axial length as the mass body continuous body 1. Reference numeral 7 is a holding jig. still,
As far as claim 1 is concerned, two elastic bodies may be arranged in the axial direction as shown in FIG. 5 of the related art.

Next, as shown in FIG. 4, the connecting portion 4 is cut by a cutting jig 8 such as a cutting tool to divide the mass body continuous body 1 into two mass bodies 2 and 3, and through the above steps. The damper of FIG. 1 is manufactured.

Therefore, according to the manufacturing method having the above steps, the positioning of the mass bodies 2 and 3 with respect to the hub 5 is performed only once in the stage of the mass body continuum 1.
The labor and time required for this work can be reduced as compared with the conventional case. Moreover, the said manufacturing method has the following effects.

Since the elastic body 6 has a long axial length extending over the two mass bodies 2 and 3, the elastic body 6 is molded and press-fitted only once, and the press-fitting is required. Since the work is performed from only one direction, the labor and time required for these works can be reduced as compared with the related art.

When the two mass bodies 2 and 3 have different outer diameters from each other as in the illustrated damper, FIG.
As shown in FIG. 5, an annular step 9 is formed on the outer peripheral surface of the mass body continuum 1. Therefore, by applying the cutting jig 8 to the step 9, the cutting position can be specified easily and accurately.

Further, generally, this type of damper includes an elastic body 6
After press-fitting, it is degreased and further painted, but it is better to coat each cutting surface of the mass bodies 2 and 3 which is difficult to coat with a spray gun.

When the mass continuum body 1 is cut with a cutting tool, the elastic body 6 is damaged by the cutting tool and a crack is generated, and there is a concern that the crack may progress when the damper operates. However, since the elastic body 6 is fitted between the mass bodies 2 and 3 and the hub 5 in a compressed state,
The test results confirm that the crack does not progress. Further, as a measure for preventing the progress of cracks, it is effective to provide chamfers 11 and 12 on the inner peripheral surface of the mass body continuous body 1 by sandwiching the inner diameter cylindrical surface 10 of the connection portion 4.

[0016]

The present invention has the following effects. That is, in the damper manufacturing method according to claim 1, a step of forming a mass body continuous body in which a plurality of mass bodies are integrally formed, and a step of connecting the mass body continuous body to the hub via an elastic body. , A step of dividing the mass body continuum into a plurality of mass bodies, and positioning of the mass body with respect to the hub is performed only once in the stage of the mass body continuum, which is required for this work. The labor and time can be reduced as compared with the conventional one, and the manufacturing cost can be reduced accordingly. Further, in the damper manufacturing method according to claim 2, a step of molding a mass body continuous body in which a plurality of mass bodies are integrally molded, and an axial length substantially the same as the mass body continuous body between the mass body continuous body and the hub. The elastic body is press-fitted from one side in the axial direction, and the step of dividing the mass body continuous body into a plurality of mass bodies, and positioning of the mass body with respect to the hub is performed only once at the stage of the mass body continuation body. The work and time required for this work can be reduced as compared with the conventional method, and the work for molding and press-fitting the elastic body is performed only once, which is necessary for these works. It is possible to reduce the labor and time required for the manufacturing as compared with the conventional method, and accordingly, it is possible to reduce the manufacturing cost.

[Brief description of drawings]

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

FIG. 2 is an explanatory view showing the procedure of the manufacturing method.

FIG. 3 is an explanatory view showing a procedure of the manufacturing method.

FIG. 4 is an explanatory view showing the procedure of the manufacturing method.

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

FIG. 6 is an explanatory view showing the procedure of the manufacturing method.

FIG. 7 is an explanatory view showing the procedure of the manufacturing method.

[Explanation of symbols]

 1 mass continuous body 2, 3 mass 4 connection part 5 hub 6 elastic body 7 holding jig 8 cutting jig 9 step 10 inner diameter cylindrical surface 11, 12 chamfer

Claims (2)

[Claims] 1. A step of forming a mass body continuous body (1) in which a plurality of mass bodies (2) and (3) are integrally formed, and the mass body continuous body (1) is elastic with respect to a hub (5). A method for manufacturing a damper, comprising: connecting via a body (6); and dividing the mass body continuous body (1) into a plurality of mass bodies (2) and (3). 2. A step of molding a mass body continuous body (1) in which a plurality of mass bodies (2) and (3) are integrally molded, and a step of forming the mass body continuous body (1) between the mass body continuous body (1) and the hub (5). A step of press-fitting an elastic body (6) having substantially the same axial length as the mass continuum (1) from one axial direction, and the mass continuum (1) being a plurality of mass bodies (2) (3) And a step of dividing into two parts.