JPH0525049U - damper - Google Patents

Abstract

(57) [Abstract] [Purpose] A hub 1 and a mass body are connected via an elastic body, and a skeleton portion 4 is provided on the hub 1 to obtain a dustproof effect and a cooling effect for a damper mounted on an engine crankshaft. , Reduce the weight of the hub 1. [Structure] The skeleton part 4 is provided with an inclination that causes an air flow from the engine side to the anti-engine side at the time of rotation, and when the dust tries to enter the engine side from the outside, the dust is added to the air flow. Put it on and blow it away. Further, heat generated around the engine due to the operation of the engine is placed on the flow of air and released to the outside. The windmill-shaped skeleton portion 4 oblique to the crankshaft has sufficient strength even if it is thin, and therefore the hub 1 can be made lighter.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a damper that absorbs and dampens vibrations generated in a crankshaft of an automobile engine.

[0002]

[Prior Art]

 Conventionally, as shown in FIGS. 3 and 4, a hub 1 and a mass body 2 are connected via an elastic body 3, a skeleton portion 4 is provided on the hub 1, and the hub 1 is mounted on a crankshaft (not shown) of an automobile engine. There is known a torsional damper that absorbs and damps the torsional vibration generated in the crankshaft. The hub 1, the mass body 2 and the elastic body 3 are all annular, and the hub 1 and the mass body 2 are formed of a predetermined metal, and the elastic body 3 is formed of a predetermined rubber. The skeleton portion 4 has a plurality of (four in the figure) spoke-shaped rising portions in the radial direction of the hub 1, and a plurality of spokes are equally arranged to form a cavity 5 between the spokes. I will do it. The skeleton portion 4 is formed for the purpose of reducing the weight of the hub 1, which is generally made of cast iron.

[0003]

[Problems to be solved by the device]

 In the above-mentioned conventional technique, since the dust outside the vehicle flows around the damper or through the cavity 5 and flows from the engine side to the engine side with the damper mounted on the crankshaft of the vehicle engine. In addition, a special oil seal with a dust-proof felt must be installed between the engine and the crankshaft, which increases the cost.

[0004]

[Means for Solving the Problems]

 In view of the above points, the present invention has been devised to solve the problems found in the above-mentioned prior art.To achieve this object, the hub and the mass body are connected via an elastic body, A skeleton portion is provided on the hub, and in a damper mounted on a crankshaft of an automobile engine, the skeleton portion is inclined so as to generate an air flow from the engine side to the anti-engine side when rotating. Provide a damper to do.

[0005]

[Action]

 The skeleton part has an inclination to generate an air flow from the engine side to the anti-engine side when rotating, and when dust tries to enter the engine side from the outside, the dust is placed on the air flow and blown away. .. In addition, heat generated around the engine as the engine operates is placed on the air flow and released to the outside.

[0006]

【Example】

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

FIGS. 1 and 2 show a hub 1 provided with a skeleton portion 4 as a single item. When the skeleton portion 4 of the hub 1 is rotated, air flow is generated from the engine side to the anti-engine side. An inclination θ is added. That is, the damper has a skeleton portion 4 in which a plurality of (four in the figure) spokes are equally arranged and is formed like a blade of a fan, and has the following effects. When the dust tries to enter the engine side from the outside, the dust is placed on the air flow and blown off so that the dust does not reach the engine. Therefore, a general oil seal without a dust-proof felt can be mounted between the engine and the crankshaft, instead of a special oil seal with a dust-proof felt, and the cost can be reduced accordingly. It is possible to cool the engine so that heat generated around the engine as the engine is operated is placed on the air flow and released to the outside. Since the skeleton portion 4 is oblique to the crankshaft and has a fan or windmill shape, sufficient strength can be secured even if the skeleton portion 4 is thin, and the hub 1 can be lightened accordingly. You can

The configurations of the mass body and the elastic body are the same as the conventional ones. Therefore, the explanation of these is omitted here.

[0009]

[Effect of the device]

 The present invention has the following effects. Since the dust from the outside is put on the air flow and blown off, a general oil seal without a dust-proof felt can be mounted between the engine and the crankshaft, and the cost can be reduced. The engine can be cooled because heat generated around the engine as the engine operates is placed on the flow of air and released to the outside. Since the skeleton part has a fan or windmill shape that is oblique to the crankshaft, sufficient strength can be secured even if the skeleton part is thin, and the hub can be made lighter.

[Brief description of drawings]

FIG. 1 is a view of a single hub unit of a damper according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA in FIG.

FIG. 3 is a front view of a damper according to a conventional example.

FIG. 4 is a sectional view taken along line B-O-B in FIG.

[Explanation of symbols]

 1 hub 2 mass body 3 elastic body 4 skeleton part 5 cavity θ inclination

Claims (1)

[Scope of utility model registration request] 1. A damper mounted on a crankshaft of an automobile engine, wherein a hub 1 is connected to a mass body through an elastic body, a skeleton portion 4 is provided on the hub 1, and the engine is used when the skeleton portion 4 rotates. A damper having an inclination θ that causes an air flow from the side to the side opposite to the engine.