JPH0527387U - damper - Google Patents

Abstract

(57) [Abstract] [Purpose] Regarding a torsional damper which is a disk type and a double mass type, heat is retained in the gap 8 between the first damper portion 2 and the second damper portion 5, and the spring member is formed. Prevents 3 and 6 from deteriorating early. [Structure] The hub 1 is provided with a slit 11, the gap 8 is communicated to the outside through the slit 11 on the side opposite to the engine, and the heat inside the gap 8 is radiated from the slit 11 to the outside. The slit 11 and the gap 8 form the air flow path 12, and air is flown by the fins to enhance the heat radiation effect. The fins are made of rubber-like elastic material and can be integrally formed simultaneously with the spring member 6.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a damper that damps vibrations generated in various rotary drive systems such as a crankshaft of an automobile engine.

[0002]

[Prior Art]

 Conventionally, as shown in FIG. 3, a vibration ring 4 is connected to one side of a hub 1 via a spring member 3 made of a rubber-like elastic material, and the spring member 3 and the vibration ring 4 hold the first damper portion 2 together. On the outer peripheral side of the first damper portion 2, a vibration ring 7 is connected to the hub 1 via a spring member 6 made of a rubber-like elastic material, and the spring member 6 and the vibration ring 7 hold the second ring. There is known a torsional damper which is a disk type and a double mass type as the damper section 5. The first damper part 2 and the second damper part 5 have different frequencies of vibrations to be damped, so that both parts 2 and 5 can be relatively moved in the rotational direction during operation. , 5, a ring-shaped gap 8 is provided.

[0003]

[Problems to be solved by the device]

 The gap 8 is closed by the hub 1 on one side in the axial direction, that is, it is the first stop over the entire circumference when viewed from the right side of the drawing. Also, the damper is attached to the crankshaft with the vibration rings 4 and 7 facing the engine side so that the vibration rings 4 and 7 do not fall off the crankshaft should the spring members 3 and 6 break during operation. Be released. Therefore, the engine (not shown) is located close to the right side of the damper in the figure. As a result, heat is likely to remain in the gap 8 during operation, and the heat may cause the spring members 3 and 6 to deteriorate early.

[0004]

[Means for Solving the Problems]

 In view of the above points, the present invention has been devised to solve the above-mentioned problems in the prior art, and in order to achieve this object, a spring member made of a rubber-like elastic material is provided on one side of the hub. To connect the vibration ring, and the spring member and the vibration ring serve as a first damper portion, and the vibration ring is connected to the hub on the outer peripheral side of the first damper portion via a spring member made of a rubber-like elastic material. In the damper having the spring member and the vibrating ring as the second damper portion, and the annular gap is provided between the first damper portion and the second damper portion, the gap is provided in the hub. A slit is provided on the outer peripheral surface of the vibrating ring of the first damper section or the inner peripheral surface of the vibrating ring of the second damper section. Shaped elastic material The providing a damper which is characterized by comprising. The slit can also serve as a rubber injection hole when molding the damper.

[0005]

[Action]

 The hub is provided with a slit, the gap communicates with the outside on the side opposite to the engine side through this slit, and the heat inside the gap is radiated to the outside from this slit. The slit and the gap form an air flow path, and fins let air flow to enhance heat dissipation. The fins are made of rubber-like elastic material and can be formed integrally with the spring member at the same time.

When manufacturing the damper, a hub and a vibration ring are previously inserted into a cavity of a mold for vulcanizing rubber, and a rubber material for molding a spring member is injected into the cavity from this state. Vulcanize and mold. Due to the arrangement of parts in the cavity, rubber injection holes (reference numerals 9 and 10 in Fig. 3) have been conventionally formed in the hub. The rubber injection holes 9 and 10 are closed by the rubber at the same time when the molding is completed. It was peeling. On the other hand, in the present invention, the slit is provided in the hub, and the hole is drilled in the hub in the same manner as the conventional one. Therefore, the slit is used as a rubber injection hole during molding.

[0007]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. The damper is a disk type and a double mass type as shown in FIGS. It has the features of.

That is, a plurality of slits 11 communicating with the gap 8 between the first damper portion 2 and the second damper portion 5 are provided in the hub 1 at equal intervals, and the dampers are provided with the slits 11 and the gaps 8. An air passage 12 is provided that penetrates in the axial direction. Each slit 11 has a predetermined angle θ in the circumferential direction of the hub 1 as shown in FIG. A plurality of fins 13 made of a rubber-like elastic material are provided on the inner peripheral surface of the vibrating ring 7 of the second damper portion 5 at equal intervals, and the fins 13 are bonded to the vibrating ring 7 like the spring member 6. The spring member 6 and the spring member 6 are integrally formed. The slits 11 and the fins 13 are alternately arranged in the circumferential direction.

The damper having the above structure has the following effects. The gap 8 is communicated to the outside on the side opposite to the engine through a plurality of slits 11 provided in the hub 1, and the heat inside the gap 8 is radiated from the slits 11 to the outside. Therefore, it is possible to prevent the spring members 3 and 6 from being deteriorated early by heat. Further, since the air flows through the air flow path 12 by the fins 13, heat can be released along with the air flow to enhance the action and effect of heat dissipation. The fins 13 are made of rubber-like elastic material and are molded integrally with the spring member 6 at the same time, and the molding is easy. The fins 13 may be provided on the outer peripheral surface of the vibration ring 4 of the first damper portion 2. Further, since the slit 11 can be used as a rubber injection hole at the time of molding, an extra time and effort for punching the hub 1 is not required in comparison with the conventional technique.

[0010]

[Effect of the device]

 The present invention has the following effects. That is, in common with claim 1 and claim 2, the gap is communicated to the outside on the side opposite to the engine side through a required number of slits provided on the hub, and the heat in the gap is radiated to the outside from this slit. Therefore, it is possible to prevent heat from staying in the gap and prevent the panel member from being deteriorated early by heat. Further, since the air is caused to flow in the air flow path by the fins, heat can be released along with this air flow, and the effect of heat dissipation can be enhanced. The fin is made of rubber-like elastic material and is molded simultaneously and integrally with the spring member, and the molding is easy. Further, according to the second aspect, since the slit can be used as a rubber injection hole at the time of molding, an extra time and effort for perforating the hub is not added to the conventional technique.

[Brief description of drawings]

FIG. 1 is a half cutaway view of a damper according to an embodiment of the present invention.

[Fig. 2] Side view of a quarter cut of the damper

FIG. 3 is a half-cut sectional view of a damper according to a conventional example.

[Explanation of symbols]

 1 Hub 2 1st damper part 3,6 Spring member 4,7 Vibration ring 5 2nd damper part 8 Gap 11 Slit 12 Air flow path 13 Fin

Claims (2)

[Scope of utility model registration request] 1. A vibration ring 4 is connected to one side of a hub 1 via a spring member 3 made of a rubber-like elastic material, and the spring member 3 and the vibration ring 4 are used as a first damper portion 2. A vibration ring 7 is connected to the hub 1 on the outer peripheral side of the damper portion 2 via a spring member 6 made of a rubber-like elastic material,
In the damper in which the spring member 6 and the vibration ring 7 are used as the second damper portion 5, and the annular gap 8 is provided between the first damper portion 2 and the second damper portion 5, A required number of slits 11 communicating with the gap 8 are provided, and the slits 11 and the gap 8 serve as an air flow path 12, and the outer peripheral surface of the vibration ring 4 of the first damper portion 2 or the second damper portion 5 is provided. The damper 13 is provided with a fin 13 made of a rubber-like elastic material on the inner peripheral surface of the vibration ring 7. 2. The damper according to claim 1, wherein the slit 1 is provided.
The damper 1 is a rubber injection hole at the time of molding the damper.