JPH0614587U - damper - Google Patents

Abstract

(57) [Abstract] [Purpose] A hub 1 provided with a housing space 2 opening toward one side in the axial direction, a mass body 4 inserted into the housing space 2, and an inner peripheral side of the mass body 4, With respect to the damper having the elastic body 6 connecting the hub 1 and the mass body 4, moisture, dust, pebbles, and the like enter the accommodation space 2, and the hub 1 and the mass body 4 are rusted or fixed to each other. Prevent. [Structure] A seal lip 7 for slidably contacting the mass body 4 with the hub 1 to shut off the accommodation space 2 from the outside of the damper.
The sealing action of the seal lip 7 prevents moisture, dust, pebbles, and the like from entering the accommodation space 2.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a damper that is mounted on a rotary drive system of an automobile engine or the like and absorbs and damps vibrations generated on a rotary shaft such as a crankshaft.

[0002]

[Prior art]

 Conventionally, as shown in FIG. 3, a hub 11 having a housing space 12 opened toward one axial direction, a mass body 13 inserted into the housing space 12, and an inner peripheral side of the mass body 13 are provided. There is known a torsional damper that is arranged and has an elastic body 14 that connects the hub 11 and the mass body 13. The hub 11 and the mass body 13 are each made of a predetermined metal, and the elastic body 14 is made of a predetermined rubber. Each part including the accommodation space 12 is annular.

[0003]

[Problems to be solved by the device]

 In the above-mentioned conventional technique, the remaining space portion of the housing space 12 of the hub 11 that houses the mass body 13 and the elastic body 14 remains in communication with the outside of the damper. Therefore, when the actual machine is used, there is a problem that moisture, dust, pebbles, and the like enter the accommodation space 12 and the hub 11 and the mass body 13 are rusted or they are fixed to each other.

[0004]

[Means for Solving the Problems]

 In view of the above points, the present invention has been devised in order to solve the problems found in the above-mentioned prior art, and in order to achieve this object, an accommodation space opened toward one side in the axial direction is provided. A damper having a hub, a mass body inserted into the accommodation space, and an elastic body arranged on the inner peripheral side of the mass body and connecting the hub and the mass body, wherein the mass body has the hub Provided is a damper, which is provided with a seal lip that slidably contacts with the outer space of the damper to block the accommodation space.

[0005]

[Operation] The mass body is provided with a seal lip that slidably contacts the hub to shut off the storage space from the outside of the damper, and the sealing action of the seal lip prevents moisture, dust, and pebbles from entering the storage space. Prevent intrusion.

[0006]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 1, a hub 1 is formed with a semi-cut cross-section substantially U-shaped portion, and an accommodation space 2 opened toward one side in the axial direction is provided. A vulcanized molded product 3 including a sleeve 5 and an elastic body 6 is housed. The elastic body 6 is vulcanized and adhered to the inner peripheral surface of the mass body 4 and the outer peripheral surface of the sleeve 5. The sleeve 5 is formed in an annular shape by sheet metal and is fitted to the hub 1 with a predetermined tightening margin. An annular seal lip 7 is vulcanized and adhered to the outer peripheral surface of the mass body 4 so as to slidably contact the hub 1 and shield the housing space 2 from the outside of the damper. The seal lip 7 is made of rubber and is vulcanized at the same time as the elastic body 6.

According to the damper having the above-described configuration, it is possible to prevent water, dust, pebbles, and the like from entering the storage space 2 due to the sealing action of the seal lip 7, and thus the hub 1 and the mass body 4 are prevented. It can prevent rusting and sticking to each other. When it is difficult to provide the seal lip 7 due to the small distance t between the outer peripheral surface of the mass body 4 and the hub 1, as shown in FIG. 2, an annular step portion 8 is formed on the outer peripheral surface of the mass body 4. Should be provided to secure space. The seal lip 7 may be vulcanized and molded as a single piece and fitted to the mass body 4. Alternatively, the elastic body 6 may be vulcanized and molded as a single piece and press-fitted between the hub 1 and the mass body 4.

[0009]

[Effect of device]

 The present invention has the following effects. In other words, the mass body is provided with a seal lip that slidably contacts the hub to shut off the storage space from the outside of the damper, and the sealing action of this seal lip prevents moisture, dust, pebbles, and the like from entering the storage space. This prevents the hub and the mass body from rusting and sticking to each other.

[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 half sectional view of a damper according to another embodiment of the present invention.

FIG. 3 is a half-cut sectional view of a damper according to a conventional example.

[Explanation of symbols]

 1 Hub 2 Storage Space 3 Vulcanized Molded Product 4 Mass Body 5 Sleeve 6 Elastic Body 7 Seal Lip 8 Step

Claims (1)

[Scope of utility model registration request] 1. A hub (1) provided with a housing space (2) opened toward one side in the axial direction, a mass body (4) inserted into the housing space (2), and the mass body (4). A damper having an elastic body (6) arranged on the inner peripheral side of the hub (1) and connecting the mass body (4) to the mass body (4). A damper provided with a seal lip (7) which movably contacts and blocks the accommodation space (2) from the outside of the damper.