JPH078645U - damper - Google Patents

Abstract

(57) [Summary] [Purpose] A fitting type damper in which an elastic body 5 made of a rubber-like elastic material is press-fitted between the hub 1 and the mass body 2 even if a large torsion input is applied, the hub 1 and the elastic body 5 or the elastic body 5 and the mass body 2 are prevented from slipping. [Structure] Each elastic body fitting surface 1 of the hub 1 and the mass body 2
The stoppers 3 and 4 made of a rubber-like elastic material are adhered to predetermined positions on the circumference of a and 2a, and the elastic body 5 is provided with a cavity 6 in which the stoppers 3 and 4 are housed and engaged, and the hub 1 and the elastic body 5, Or elastic body 5
And the mass body 2 were stopped via the stoppers 3 and 4, respectively. The stoppers 3, 4 made of rubber-like elastic material can participate in the vibration damping action.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a damper that absorbs and dampens vibrations generated in various rotary shafts such as a crankshaft of an automobile engine.

[0002]

[Prior art]

 Conventionally, for example, as described in Japanese Utility Model Laid-Open No. 63-9538, a fitting type torsional damper in which an elastic body made of a rubber-like elastic material is press-fitted between a hub and a mass body is known. There is.

[0003]

[Problems to be solved by the device]

 However, this type of damper has a problem that the hub and the elastic body or the elastic body and the mass body slip when a large torsional input is applied.

[0004]

[Means for Solving the Problems]

 In view of the above points, the present invention has been devised to solve the above-mentioned problems in the prior art. In order to achieve this object, an elastic member made of a rubber-like elastic material is provided between the hub and the mass body. In a fitting type damper in which a body is press-fitted, a rubber-like elastic material stopper is bonded to a predetermined position on the circumference of each elastic body fitting surface of the hub and the mass body, and the stopper is attached to the elastic body. It was decided to provide a vacant space that was housed and engaged.

[0005]

[Action]

 In a mating type damper, rubber-like elastic stoppers are bonded to circumferentially fixed locations on the elastic body mating surfaces of the hub and mass body, and there is a space where the stoppers are housed and engaged with the elastic body. When provided, the hub and the elastic body, or the elastic body and the mass body are respectively prevented from rotating through the stopper.

[0006]

Embodiments Next, embodiments of the present invention will be described with reference to the drawings.

As shown in FIG. 1 and FIG. 2, an annular mass body 2 is concentrically arranged on the outer peripheral side of the annular hub 1, and the outer periphery of the hub 1 is an elastic body fitting surface. A stopper 3 made of a rubber-like elastic material is bonded to one location on the circumference of the surface 1a. The stopper 3 and the mass body 2 are not in contact with each other. A stopper 4 made of a rubber-like elastic material is adhered to one place on the circumference of the inner peripheral surface 2a of the mass body 2 which is the elastic body fitting surface. The stopper 4 and the hub 1 are not in contact with each other. The pair of stoppers 3 and 4 are provided at the same position on the circumference and are arranged in the axial direction. An elastic body 5 made of a rubber-like elastic material is press-fitted between the hub 1 and the mass body 2 from one side in the axial direction. The elastic body 5 originally has an annular shape, but in the case of this damper, a void 6 is provided at one location on the circumference, and the stoppers 3, 4 are accommodated in this void 6. Engaged. The inner walls 6a and 6b of the void 6 are in contact with the stoppers 3 and 4. Further, an annular ridge portion 8 is provided on the outer peripheral surface 1a of the hub 1, and an annular valley portion 9 facing the ridge portion 8 is provided on the inner peripheral surface 2a of the mass body 2. A convolution portion 7 is provided by the portion 9 for preventing the elastic body 5 press-fitted between the hub 1 and the mass body 2 from coming off in the axial direction.

In the damper having the above structure, the stopper 3 adhered to the outer peripheral surface 1 a of the hub 1 and the elastic body 5 are engaged with each other in the circumferential direction, so that the hub 1 and the elastic body 5 interpose the stopper 3 therebetween. Have been stopped. Further, the stopper 4 adhered to the inner peripheral surface 2a of the mass body 2 and the elastic body 5 are engaged in the circumferential direction, so that the mass body 2 and the elastic body 5 are prevented from rotating via the stopper 4. Therefore, even if a large torsional input is applied to the damper, slippage between the hub 1 and the elastic body 5 or between the elastic body 5 and the mass body 2 can be prevented. Further, since the stoppers 3 and 4 are not made of a rigid body such as metal but made of a rubber-like elastic material different from or the same as the elastic body 5, the stoppers 3 and 4 also participate in the vibration damping action together with the elastic body 5. Therefore, the vibration damping effect is greater than that when the stoppers 3 and 4 are rigid bodies.

As shown in FIG. 3, the elastic body 5 is preliminarily formed into a ring shape. However, as shown in FIG. 4, after being formed into an elongated plate shape, it is rolled into a ring shape and press-fitted. It's okay. Further, the space 6 does not necessarily have to be formed in a slit shape that divides the elastic body 5 at one circumferential position, and may be a recess in which the elastic body 5 is left as a ring.

[0010]

[Effect of device]

 The present invention has the following effects. That is, in a fitting type damper, a rubber-made elastic material stopper is bonded to a predetermined location on the circumference of each elastic body fitting surface of the hub and the mass body, and the space where the stopper is housed in the elastic body is engaged. Since the hub is provided, the hub and the elastic body, or the elastic body and the mass body can be respectively prevented from rotating through the stoppers. Therefore, even if a large torsional input is applied to the damper, slippage between the hub and the elastic body or the elastic body and the mass body can be prevented. Further, since the stopper is formed of a rubber-like elastic material instead of a rigid body such as metal, the stopper can participate in the vibration damping action together with the elastic body, and a large vibration damping effect can be obtained.

[Brief description of drawings]

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

FIG. 2 is a sectional view taken along line AA in FIG.

FIG. 3 is a perspective view of an elastic body.

FIG. 4 is a perspective view showing another example of the elastic body.

[Explanation of symbols]

 1 hub 1a outer peripheral surface (elastic body fitting surface) 2 mass body 2a inner peripheral surface (elastic body fitting surface) 3,4 stopper 5 elastic body 6 voids 6a, 6b inner wall 7 convolution portion 8 mountain portion 9 valley portion

Claims (1)

[Scope of utility model registration request] 1. A fitting type damper in which an elastic body (5) made of a rubber-like elastic material is press-fitted between the hub (1) and the mass body (2), the hub (1) and the mass body (2) ), Rubber-like elastic material stoppers (3) and (4) are adhered to predetermined positions on the circumference of each elastic body fitting surface (1a) (2a), and the elastic body (5) is provided with the stopper (3). A damper having a space (6) for accommodating and engaging (4).