JPH0232908Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention suppresses torsional vibrations applied to the crankshaft of an internal combustion engine, for example, by reducing slip resistance in the shear direction due to inertia by an elastic body combined with a viscous liquid filled inside. Due to the synergistic effect of parallel elastic deformation, damping,
The present invention relates to an improvement in the structure of an inertial mass body in a viscous rubber damper having an absorption function.

[Conventional technology]

Conventionally, as shown in FIG. 3, this type of viscous rubber damper has been manufactured by cutting the inertial mass body 11 from a steel bar, cast material, cast material, etc., and forming a stepped wall portion protruding inside. 13 and an external circumferential wall portion 14 in the width direction are integrally provided.
2 and the other side wall member 12' having a stepped wall part 13' projecting therein by cutting in the same manner, and caulking or welding the mutual assembly peripheral surface parts 15.
It was configured as follows.

[Problem that the invention attempts to solve]

However, such a conventional inertial mass body 1
In the case of item 1, the number of machining operations is significantly increased due to the cutting process, and in addition, in the case of cast or forged products, the manufacturing and equipment are complicated and large-scale, which reduces productivity. This naturally led to a problem in that the product cost was high.

In order to extremely effectively solve the above-mentioned conventional problems, the present invention provides an inertial mass body consisting of a separate body on the outside of each inner circumferential surface that faces in the front and back direction with the disc body sandwiched between them. a side wall member that protrudes and fixes the distance ring and maintains a minute gap with the opposing surface near the outer periphery of the disc body, and a separate member from the side wall member;
In the same way, by forming the external circumferential cylindrical ring member that maintains a small gap by kiln-bonding each other, it is possible to simply press the steel plate using a steel plate and cut the steel pipe into circular slices. As a result, each distance ring, side wall member, and circumferential cylindrical ring member can be molded, which greatly reduces the number of cutting operations and at the same time significantly improves productivity through easy manufacturing. The purpose of this invention is to provide a viscous rubber damper at a low cost.

[Means to solve the problem]

The present invention is to fill the vicinity of the outer circumference of a disc body, which forms the attachment part to the mating rotary body, with a viscous liquid while maintaining a minute gap with the opposing inner circumferential surface, and to fill the inside with a ring-shaped rubber or the like. In the structure of the viscous rubber damper, the inertial mass body is sealed and enclosed in an enveloping manner, with an inertial mass body connected to a disc body by pressing an elastic body interposed therebetween, and the inertial mass body is sandwiched between the disc body and A side wall member that maintains the minute gap by protruding and fixing a separate distance ring to the outside of each inner peripheral surface facing in the direction, and a side wall member that is separate from the side wall member and similarly has a minute gap. The gist of the damper is a viscous rubber damper constructed by welding and soldering together an external circumferential cylindrical ring member holding a viscous rubber damper.

〔Example〕

Hereinafter, one embodiment of the present invention will be explained with reference to the drawings. Fig. 1 is a partial vertical cross-sectional view of a viscous rubber damper according to the embodiment, and Fig. 2 is a partial longitudinal cross-sectional view of the same according to another embodiment. In the figure, reference numeral 1 denotes an inertial mass body, and distance rings 3, 3', which are separate bodies, are welded and soldered to the outside of the individual inner circumferential surfaces that sandwich a disc body 8 and face each other in the front-rear direction. , 9' are protruded and fixed, and a small gap 7, 7' is maintained with the facing surface near the outer periphery of the disc body 8 which forms the attachment part to the mating rotary body installed inside, and press-worked using steel plate material. and an outer peripheral cylindrical ring member 4 formed by cutting a steel pipe material into circular slices to maintain a minute gap 7''. are constructed by welding and soldering 10, 10' to each other, and the minute gaps 7, 10' inside are
7', 7'' parts are filled with a viscous liquid 6 such as silicone oil, and annular elastic bodies 5, 5' such as rubber are interposed in pressure contact with the inside of the viscous liquid 6, and the state is connected to the rotary body 8. In other words, it is constructed by being hermetically attached to the vicinity of the outer periphery of the disk body 8 in an enveloping manner.

In addition, the soldering parts 9, 9', 10, 10' are as follows:
For example, this may be done by means such as brazing or electron beam welding.

[Effect]

In this way, the present invention provides distance rings 3, 3', side wall members 2, and
2' and the circumferential cylindrical ring member 4 are welded together 9,
Inertial mass body 1 with a structure of 9', 10, 10'
Therefore, it can be formed extremely easily simply by press working using a steel plate material and cutting into circular slices using a steel pipe material.

[Effect of idea]

As explained above, in the present invention, an inertial mass body can be constructed extremely simply by simply using steel plate materials and steel pipe materials, and then by soldering, so that the stepped wall inside It is possible to significantly reduce the number of machining processes by almost eliminating the need for cutting processes including the circumferential wall portion in the width direction, and at the same time, the product cost can be reduced by improving productivity due to simple manufacturing. This is an extremely useful viscous rubber damper.

[Brief explanation of the drawing]

Fig. 1 is a partial vertical cross-sectional view of a viscous rubber damper according to an embodiment of the present invention, Fig. 2 is a partial vertical cross-sectional view of the same as the above of another embodiment, and Fig. 3 is a partial longitudinal cross-sectional view of a viscous rubber damper according to an embodiment of the present invention. FIG. 1... Inertial mass body, 2, 2'... Side wall member, 3,
3'... Distance ring, 4... Circumferential cylindrical ring member, 7, 7'... Minute gap, 8... Disc body, 9,
9', 10, 10'...Welded and soldered.

Claims (1)

[Scope of utility model registration request] A viscous liquid is filled in the vicinity of the outer periphery of the disc body, which forms the attachment part to the mating rotating body, with a slight gap between it and the opposing inner periphery, and an annular elastic body such as rubber is placed inside the viscous liquid. In the structure of a viscous rubber damper in which an inertial mass body is connected to a disk body through pressure welding and is hermetically sealed in an enveloping manner, the inertial mass body 1 is sandwiched between the disk body 8 and moved in the longitudinal direction thereof. Side wall members 2, 2' which maintain the minute gaps 7, 7' by fixing separate distance rings 3, 3' protruding from the outside of each opposing inner circumferential surface, and the side wall members 2, 2' and an external circumferential cylindrical ring member 4 which similarly maintains a minute gap 7'' are welded to each other. Features a viscous rubber damper.