JPH0231624Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention was made in order to improve the durability and safety of flywheel dampers related to vibration isolation technology for rotating shafts. .

[Conventional technology]

A flywheel damper is mainly used for the purpose of damping vibrations in the bending direction and twisting direction when the crankshaft rotates. That is, as the cross-sectional diagram is shown in Fig. 3,
A structure in which a vibration ring c is inserted and fixed onto the outer periphery of a disk-shaped flywheel a via an annular elastic member b is conventionally known.

[Problems to be solved by the invention] However, since the flywheel damper does not have any stopper mechanism, the strain rate of the elastic member b due to vibration in the bending direction tends to become excessive, which reduces the durability of the elastic member. This is a contributing factor to the In addition, in the event that the elastic member b is damaged,
There is a risk that the integrity of the flywheel a and the vibration ring c will be lost, and the vibration ring will fly out.
There were also problems in terms of safety.

[Means for solving problems]

The present invention was devised to solve the above problems, and aims to provide a flywheel damper with excellent durability and safety. An annular stopper mechanism is provided to surround the vibrating ring from both sides, and fin-shaped portions integrally extending from an elastic member are extended on both axial sides of the vibrating ring.

[Effect]

Therefore, according to the present invention, the stopper suppresses excessive deformation (strain) of the annular elastic member due to vibration in the bending direction, and improves the durability of the elastic member. Even if the elastic member is damaged during driving,
The action of the stopper prevents the vibrating ring from jumping out, thereby significantly increasing its safety. Further, the fin-like parts made of an elastic material spread out on both axial sides of the vibrating ring prevent the generation of hitting sounds that occur when the vibrating ring collides with the stopper.

〔Example〕

Hereinafter, one embodiment of the flywheel damper of the present invention will be described based on the drawings. FIG. 1 is a front view of this embodiment, and FIG. 2 is a sectional view taken along the line A--A in FIG. 1. In the figure, reference numeral 1 denotes a substantially disk-shaped flywheel fixed to a drive shaft (not shown) inserted into the shaft hole 2, and 3 is concentrically fastened to the flywheel 1 by bolts 4. The hub 5 is an annular rubber fixed to the outer periphery of the hub 3;
Furthermore, 6 is a vibration ring fixed to the outer periphery of the annular rubber 5. The flywheel 1 is formed with an annular step 7 that surrounds the vibrating ring 6 from its outer circumferential side, and the step 7 has an annular stopper 8 having a substantially L-shaped cross section in the inner diameter direction. It is fitted so that the extending portion 8' is on the outside. Further, on both axial sides of the vibration ring 6, fin-like portions 5a and 5b extending in the outer diameter direction from the annular rubber 5 are provided.
is being displayed.

According to the above structure, the vibrating ring 6 is surrounded by the step part 7 and the stopper 8 of the flywheel 1 on its outer periphery and both sides, and therefore, the vibration ring 6 is not bent in the bending direction when the shaft is driven. Vibration is adjusted, thereby suppressing excessive distortion of the annular rubber 5, which has the effect of contributing to improving its durability. Further, even if the annular rubber 5 should break during driving, the vibration ring 6 will be prevented from popping out by the stopper 8, and danger will be avoided.
The fins 5a and 5b of the annular rubber 5 spread on both sides of the vibrating ring 6 prevent the generation of loud metallic sounds when the vibrating ring 6 comes into contact with the stopper 8 due to its vibration. It was established for the purpose of

[Effect of idea]

As explained above, the flywheel damper of the present invention is provided with a stopper mechanism configured to surround the outer periphery and both sides of the vibration ring, thereby preventing excessive deformation of the annular elastic member due to bending vibration of the crankshaft. (distortion), thereby improving its durability, and even if the elastic member breaks during driving, the stopper mechanism prevents the vibration ring from popping out, providing extremely high safety. I can do it. Further, since the fin-like portions integrally extending from the elastic member are extended on both axial sides of the vibrating ring, it is possible to prevent the occurrence of hitting noise when the stopper is operated.

[Brief explanation of the drawing]

Figure 1 is a front view showing one embodiment of the flywheel damper of the present invention, and Figure 2 is A-A in Figure 1.
FIG. 3 is a cross-sectional view showing an example of a conventional flywheel damper. 1... flywheel, 3... hub, 5... annular rubber, 5a, 5b... fin-shaped portion, 6... vibrating ring, 7... step, 8... stopper.

Claims (1)

[Scope of utility model registration request] An annular hub 3 is attached concentrically to an annular flywheel 1 that is externally fixed to a drive shaft.
In the flywheel damper, a vibration ring 6 is connected to the outer circumferential side of the flywheel 1 via an annular elastic member 5.
Annular stopper mechanisms 7 and 8 are provided to surround the vibrating ring 6 from the outer periphery and both sides in the axial direction, and fin-like portions 5a and 5b integrally extending from the elastic member 5 are extended on both axial sides of the vibration ring 6. flywheel damper.