JPH064115Y2 - Torsional damper - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a torsional damper, and in particular, in a bush type torsional damper,
The present invention relates to a torsional damper in which the vibration ring does not scatter.

[Prior art and its problems]

Generally, in a bush type torsional damper, a sleeve is press-fitted into a hub that is attached to a crankshaft of an engine and integrally rotates, and this sleeve is provided with rubber and a vibration ring for obtaining an inertial mass. The sleeve, the rubber and the vibration ring are integrated by vulcanization adhesion or baking.

When the hub rotates integrally with the crankshaft, the sleeve, the rubber and the vibration ring also rotate together to damp the torsion of the crankshaft. For example, the rubber may be damaged or adhered. If peeling occurs, the vibrating ring also rotates at a high speed, so it gradually moves in the axial direction of the crankshaft,
When it is disengaged from the hub, it may be blown off by the action of centrifugal force, and in such a case, it may collide with other members in the vicinity and adversely affect it. It was

This invention solves the problems of the conventional ones described above, and in a bush type torsional damper, when the high speed rotation is performed integrally with the crankshaft, the rubber is not damaged or the adhesive peels off. Even if it occurs, it is possible to prevent the vibrating ring from moving in the axial direction, thereby preventing the vibrating ring from being blown off by the action of centrifugal force, and preventing other nearby members from being adversely affected. The purpose is to provide a torsion damper that can be used.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention has one end opened, and a hollow shaft of a hub in which a crankshaft is provided in the center of the closed other end, and a rubber is inserted from the one end opening to the inside. An annular sleeve integrally provided with a vibration ring is press-fitted, and a slip-out preventing means is formed on the tip end side of the vibration ring in the press-fitting direction, and the slip-out preventing means has an outer side inside the outer peripheral surface of the sleeve. The torsional damper is characterized in that it is located outside the inner peripheral surface.

[Action]

By adopting the above means, even if the rubber breaks or the adhesive peels off, the vibration ring is prevented from moving in the axial direction with respect to the hub and blown off by the action of centrifugal force. Is prevented, thereby preventing adverse effects on other members in the vicinity. In addition, the device for preventing the device from coming off is provided on the vibrating ring,
Since it acts as a part of the inertial mass and does not increase the weight on the hub side, the inertial mass can be reduced. Further, it is possible to select a shape having a sufficiently large strength for providing the vibrating ring with the slip-out preventing means.

〔Example〕

 An embodiment of the present invention shown in the drawings will be described below.

FIG. 1 shows a bush type torsional damper according to the present invention. This torsional damper is attached to a crankshaft 6 of an engine and
It has a hub 1 in which a hollow portion 1a is formed, and a sleeve 2 which is press-fitted into the inner peripheral surface of the hollow portion 1a of the hub 1, and the rubber 3 and the rubber 3 are provided on the inner peripheral surface of the sleeve 2. A vibration ring 4 for obtaining an inertial mass is provided on the inner peripheral portion of 3, and the sleeve 2, the rubber 3 and the vibration ring 4 are integrated by vulcanization adhesion or baking.

The sleeve 2, the rubber 3, and the vibrating ring 4 have a vertical portion 1b on the inner side thereof that forms a hollow portion 1a of the hub 1.
And a rubber ring 3 of the sleeve 2 at the outermost end thereof. The end portion is fixed to the vibrating ring 4 by means such as a bolt and a fitting or the like within this space. The slip-out preventing means 5 is provided between the inner peripheral surface that is in contact with the outer peripheral surface that is a press-fitting portion with the hub 1.

Since the size of the slip-out preventing means 5 is as described above, when the sleeve 2 is press-fitted into the inner periphery of the hub 1,
The rubber 3, the vibration ring 4, and the slip-out preventing means 5 are integrally attached to the sleeve 2 in advance, but the slip-out preventing means does not hinder the press-fitting of the sleeve 2.

When the rubber is broken or the adhesive is peeled off during use, the vibration ring 4 is detached from the hub 1 and gradually moved in the axial direction. Sleeve 2 that is press-fitted and rotates integrally
The outermost end of the slip-off preventing means 5 contacts the end surface of the shaft, and therefore, the further movement of the vibrating ring 4 in the axial direction is prevented, and is held in contact with the rubber by the action of centrifugal force. There is no fear of being scattered because it will be scattered.

Further, if the gap between the end surface of the sleeve 2 and the slip-out preventing means 5 is narrowed, when the vibrating ring 4 moves in the axial direction, the slip-out preventing means 5 and the sleeve 2 come into contact with each other to generate an abnormal sound. Therefore, due to this noise, the vibration ring 4 is damaged by the rubber 3, the adhesive is peeled off, etc.
You can know that it has stopped rotating together with.

In the above embodiment, the end of the slip-out preventing means is fixed to the vibration ring so that the end of the sleeve and the slip-out preventing means come into contact with each other when an abnormality occurs to prevent the vibration ring from moving in the axial direction. However, without being limited to this, for example, the outer peripheral end of the slip-out preventing means is fixed to the left end of the hub or the sleeve, and the inner peripheral end of the slip-out preventing metal is located on the left side of the vibrating ring. In other words, it is only necessary to provide a slip-out preventing means so as to prevent the vibration ring from moving in the axial direction with respect to the hub that rotates integrally with the crankshaft or the sleeve that is press-fitted into this hub. Is.

[Effect of device]

This invention is configured as described above, so that if the rubber breaks or the adhesive peels off during rotation of the crankshaft, the vibration ring will scatter outward because the vibration ring is located inside the hollow part of the hub. In addition, the vibrating ring is prevented from scattering in one axial direction by the abutment prevention means contacting the end of the sleeve, and thus the vibrating ring is reliably scattered in any direction. Therefore, the other adjacent members will not be adversely affected. Furthermore, when assembling,
A sleeve with a vibration ring attached via rubber inside,
Since only the work of press-fitting into the hollow portion of the hub is required, the assembly work is very easy.

BRIEF DESCRIPTION OF THE DRAWINGS The drawing shows an embodiment of the present invention and FIG. 1 is a schematic vertical sectional view. 1 ... Hub 1a ... Hollow part 1b ... Vertical part 2 ... Sleeve 3 ... Rubber 4 ... Vibration ring 5 ... Detachment prevention metal fitting 6 ... Crankshaft

Claims (1)

[Scope of utility model registration request] 1. A rubber (1) is opened inward from a hollow portion (1a) of a hub (1) having an opening at one end and a crankshaft (6) provided at the center of the closed other end. An annular sleeve (2) integrally provided with a vibrating ring (4) is press-fitted via (3), and a slip-out preventing means is formed at the tip end side of the vibrating ring (4) in the press-fitting direction. (5) is a torsional damper characterized in that the radial end portion (7) of the radial direction is inside the outer peripheral surface of the sleeve (2) and outside the inner peripheral surface thereof.