JPS6242193Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a damper device.

Conventionally, as shown in Japanese Utility Model Publication No. 51-29433, for example, two annular mass bodies are connected to each other, and a disc-shaped body is disposed within an annular groove formed by the two mass bodies. a mounting body, and a rubber elastic body clamped between both sides of the mounting body and each of the above-mentioned mass bodies, and formed by the above-mentioned mass bodies, the mounting body, and the elastic body. A damper device in which a viscous fluid is sealed in a closed space is known.

However, in this conventional device, the rubber elastic body is only clamped between both sides of the mounting body and each mass body, but is not bonded to either the mounting body or the mass body. If the elastic body is clamped in a stiff state when assembling this device, the elastic force in the circumferential direction of the elastic body will differ from the desired value, and the elastic body and the mounting body or mass If a foreign object is caught between the elastic body and the body, there is a problem in that slippage occurs between the elastic body and the attachment body or the mass body, making it impossible to obtain the desired performance.

Further, in this conventional device, even if an attempt is made to vulcanize and bond the elastic body, the attachment body, and the mass body, the vulcanization process becomes difficult because the radially outward side of the elastic body is a closed space.

The present invention was devised in view of the above, and is a damper device having an inertial mass fixed to the end of the crankshaft via an elastic body. An elastic body A made of rubber having one end surface vulcanized and bonded to the inertial mass A and an annular auxiliary plate A vulcanized and bonded to the other end surface; an elastic body B made of rubber and having an annular auxiliary plate B vulcanized and bonded to the other end surface;
and a damper disk fixed to the crankshaft and to which both the auxiliary plates A and B are fixed, the inertial mass A, the elastic body A, the auxiliary plate A, the damper disk, the auxiliary plate B, the elastic body B and the inertial mass B are arranged in order along the longitudinal direction of the crankshaft,
The outer periphery of the damper disk is arranged with a gap in an annular space formed by fixing the inertial masses A and B to each other at a position radially outward from the elastic bodies, and the gap is sealed with a viscous liquid. The damper device is characterized in that the elastic bodies A and B are each formed integrally with the elastic bodies and have seal portions interposed between each of the auxiliary plates A and B and the damper disk. It is.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

In the figure, 2 is the crankshaft of the engine, and 4 is a damper device fixed to the tip of the crankshaft 2. The damper device 4 includes an inertial mass A6 and an inertial mass B8 divided in the longitudinal direction of the crankshaft 2, an annular damper disk 12 fixed to the crankshaft 2 by bolts 10, and both inertial masses A6 and B.
8 to the damper disk 12, it has an annular elastic body A14 and an annular elastic body B16.

Both elastic bodies A14 and B16 are made of rubber.

The front surface of the elastic body A14 is vulcanized and bonded to the inertial mass A6, and the back surface is vulcanized and bonded to the outer peripheral surface of the annular auxiliary plate A18. The back surface of the elastic body B16 is vulcanized and bonded to the inertial mass B8, and the front surface is vulcanized and bonded to the outer peripheral surface of the annular auxiliary plate B20.

The inertial mass A6, the elastic body A14, the auxiliary plate A18, the damper disk 12, the auxiliary plate B20, the elastic body B16, and the inertial mass B8 are arranged in order along the length direction of the crankshaft 2, Some parts overlap with each other.

Both of the auxiliary plates A18 and B20 are fixed to the damper disk 12 by rivets 22,
At this time, inertial masses A6, B8 are replaced by both elastic bodies A14,
The outer circumferential portion of the damper disk 12 is inserted with a gap in a space 24 that is fixed to each other at a position radially outward from B16, and a viscous liquid such as silicone oil is inserted into the space 24. There is.

With the above configuration, the inertial masses A6 and B8 are connected to the damper disk 1 through the elastic bodies A14 and B16.
The auxiliary plates A18 and B20 fixed to the auxiliary plates A18 and B20 form an elastic damper device, and the viscosity of the silicone oil sealed in the space 24 between the inertial masses A6 and B8 and the damper disk 12 forms a viscous damper device. Configure.

Note that FIG. 2 shows an enlarged view of the portion shown in FIG. 1, and as is clear from FIG. Installed seal part 2
6 is formed integrally with the elastic body A14. Although not shown, a similar seal portion is also integrally formed on the outer peripheral edge of the elastic body B16.

Therefore, according to this embodiment, each member is arranged so that some parts overlap with each other along the longitudinal direction of the crankshaft, and the inertial masses A6 and B8 are divided, so that the viscous liquid is The shapes of the damper disk and the inertial mass that form the gap to be sealed can be made extremely simple, facilitating processing and assembly, and providing the device at a low cost. In particular, each member A
6, A18, A14 and B8, B20, B16 can be assembled as sub-assemblies, and this allows vulcanization adhesion between the elastic body A14, inertial mass A6, and auxiliary plate A18, as well as elastic body B16, inertial mass B8, and auxiliary plate. Vulcanization adhesion with the plate B20 can be easily performed.
Moreover, when assembling each as a subassembly, each inertial mass A6 of each elastic body A14, B16,
Since the adhesion positions for B8 and the auxiliary plates A18, B20 can maintain good accuracy, when the product is completed by assembling each subassembly to the damper disk 12, each elastic body A14, B16
This allows each elastic body to exert a desired elastic force in the circumferential direction, thereby significantly reducing product variations. Furthermore, a rubber seal portion 26 securely seals between the auxiliary plate A18 and the damper disk 12, and the seal portion 2
6 is formed integrally with the elastic body A14, so
Not only can this be implemented at extremely low cost, but it also has the effect of preventing forgetting to assemble the seal member.

As is clear from the above, according to the present invention, various problems in the conventional apparatus described above can be solved.

[Brief explanation of the drawing]

Figure 1 is a schematic diagram showing one embodiment of the present invention;
The figure is an enlarged view of the portion shown in FIG. 2... Crankshaft, 4... Damper device, 12
...Damper disk, A6, B8 ... Inertial mass, A14, B16 ... Elastic body, A18, B20
...Auxiliary plate.

Claims (1)

[Scope of utility model registration request] In a damper device having an inertial mass fixed to the end of the crankshaft via an elastic body, the inertial masses A and B are divided in the longitudinal direction of the crankshaft, forming an annular shape, and one end surface is vulcanized to the inertial mass A. An elastic body A made of rubber, which is bonded and has an annular auxiliary plate A vulcanized and bonded to the other end surface, forming an annular shape, and one end surface of which is vulcanized and bonded to the inertial mass B, and an annular auxiliary plate B is vulcanized to the other end surface. A rubber elastic body B is bonded, and a damper disk is fixed to the crankshaft and both of the auxiliary plates A and B are fixed, the inertial mass A, the elastic body A,
The auxiliary plate A, the damper disk, the auxiliary plate B, the elastic body B, and the inertial mass B are arranged in order along the longitudinal direction of the crankshaft, and both the inertial masses A and B are connected to the elastic body The outer periphery of the damper disk is disposed with a gap in an annular space formed by being fixed to each other at a position outward in the radial direction, and the gap is sealed with a viscous liquid. 1. A damper device characterized by having a seal portion formed integrally with the body and interposed between each of the auxiliary plates A and B and the damper disk.