JPH01145446A - Torsional damper - Google Patents

Abstract

PURPOSE:To prevent the leakage of fluid firmly fixing an inertia ring and an elastic unit by providing an arc-shaped spacer, which is inserted between the inertia rings forming a clearance for the high viscous fluid to be sealed between the spacer and a plate, and a fixing ring which integrally forms these spacer and inertia rings by calking from the peripheral side. CONSTITUTION:An elastic unit 3 of rubber or the like is adhesively mounted by vulcanization to both sides of a disk-shaped plate 2 fixed to a rotary shaft 1. An inertia ring 4 is adhesively mounted by vulcanization to these elastic units 3. A circular arc-shaped spacer 5 is inserted between these inertia rings 4 from a peripheral side of the rings 4, and a clearance 6 is formed between the spacer 5 and the plate 2. High viscous fluid 7 is sealed in the clearance 6. In the peripheral side of the inertia ring 4 and the spacer 5, these are integrally formed by calking with a fixing ring 8. By the constitution thus obtained, enabling the adhesive mounting by vulcanization to be performed between the elastic unit 3 and the plate 2 and between the inertia ring 4 and the elastic unit 3, further because calking is applied by the fixing ring, leakage of the high viscous fluid 7 can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a torsional damper for reducing torsional vibration of an engine crankshaft or the like.

C. Prior Art] As shown in FIGS. 5 and 6, the most commonly used conventional torsional damper is a disk-shaped plate 100 fixed to a rotating shaft such as the crankshaft of an engine.
Rubber 101 is vulcanized and adhered to both sides of the plate 100, and the inertia ring is divided into two parts on both sides of the plate 100 to form the first inertia ring 102.
and a second inertia ring 103, and the first and second inertia rings 102, 103 were fixed by caulking on the outer periphery, and were attached to the rubber 101, 101 by pressure contact or adhesive. A high viscosity fluid 104 was sealed in the gaps between the first and second inertia rings 102, 103, the plate 100, and the rubber 101, 101.

In the conventional example shown in FIG. 7, in order to accurately form a narrow gap 105 of 1 fi or less formed on the outer peripheral side of the play 1-100, a ring-shaped spacer 106 is used.
Inertia ring 102, 103 and spacer 10 by 07
6,106 was fixed.

[Problem to be solved]

In the conventional example shown in FIGS. 5 and 6, the inertia ring 102
, 103 and the rubber 101, 101 are fixed by pressure welding or adhesive, the fixing force and adhesive force are unstable, and the enclosed high viscosity fluid is likely to leak, causing serious trouble (for example, if the crankshaft breakage, etc.). If the inertia rings 102 and 103 were vulcanized and bonded to the rubbers 101 and 101, they could be firmly fixed, but since a gap 105 had to be formed, vulcanization and bonding with the rubbers 101 and 101 could not be achieved. Also, in the conventional example shown in FIG.
1,101 and the inertia rings 102 and 103, the fixing force and adhesive force are unstable, and highly viscous fluid is likely to leak. In addition, the fixing ring 107 cannot be attached by welding. Since it is installed with a screw, it has disadvantages such as easy leakage and high cost.

Therefore, in this invention, the inertia ring and an elastic body such as rubber are firmly fixed by vulcanization adhesive, and the fixing ring is caulked on the outer circumferential side to prevent high viscosity fluid from leaking from the gap. The purpose of this invention is to provide a torsional damper that is more firmly attached.

[Means for solving problems]

In order to achieve the above object, the present invention includes a disk-shaped plate fixed to a rotating shaft, a pair of inertia rings vulcanized and bonded to both sides of the plate via an elastic body such as rubber, and an inertia ring. A plurality of arc-shaped spacers divided into at least two halves are inserted between the inertia rings from the outer periphery of the inertia ring and form a gap for sealing a high viscosity fluid between the plate and the inertia ring and the spacer. It consists of an integrated fixing ring.

[Effect]

In this invention, since the spacer is divided into at least two parts, the elastic body and the inertia ring which are vulcanized and bonded on both sides of the plate can be vulcanized and bonded together to achieve strong adhesion. The rings are bonded at the same time when the elastic body is vulcanized, then the spacer is inserted between the inertia rings, and finally the inertia ring and spacer can be integrally caulked with a fixing ring.

〔Example〕

Preferred embodiments of the present invention will be described below with reference to the drawings.

In Fig. 1, a rotating shaft 1 such as an engine crankshaft is shown.
(See FIG. 2) Elastic bodies 3, such as rubber, are vulcanized and bonded to both sides of a disk-shaped plate 2. An inertia ring 4.4 is vulcanized and bonded to these elastic bodies 3,3. These inertia rings 4 from the outer circumferential side of the inertia rings 4, 4
, 4, and a plurality of arc-shaped spacers 5 are inserted between the spacers 5 and the plate 2 to form a gap 6. Gap 6
A highly viscous fluid 7 is sealed inside. The inertia ring 4.4 and the spacer 5 are integrated with a fixing ring 8 by caulking on the outer circumferential side thereof.

In this embodiment, the spacer 5 is composed of two arc-shaped ring bodies 5A and 5B divided into two as shown in FIG.
It can be inserted from the outer circumferential side. Further, as shown in FIG. 2, a recess 5C is formed around the inner periphery into which the outer peripheral end of the plate 2 fits to form a gap 6. In this example, the vulcanization mold includes a plate 2 and an inertia ring 4.4.
can be set and vulcanized and bonded so as to be integrated with the elastic body 3.3. Although not shown, the inertia ring 4
．． It is preferable to provide a sealing material such as an O-ring between the spacer 4 and the spacer 5 and between the inertia rings 4, 4 and the fixed ring 8 to prevent liquid leakage. Elastic body 3,
3, after integrally molding the plate 29 elastic body 3.3 and the inertia ring 4.4, the spacers 5A, 5B divided into two or more parts are combined into the inertia ring 4.4.3. The inertia rings 4, 4 and the spacer 5 are integrally fixed by inserting the fixing ring 8 between them, and finally covering the fixing ring 8 and caulking both ends of the fixing ring 8.

The torsional damper configured as shown in FIGS. 1 to 3 has a structure in which a plate 2 and inertia rings 4, 4 torsionally vibrate relative to each other due to the rotation of a rotating shaft 1, thereby reducing vibrations of the rotating shaft. Can be done. At this time, a damping force is generated by the highly viscous fluid 7 in the gap 6 between the spacer 5 and the plate 2, making it possible to reduce vibration even more effectively.

In addition to the inertia ring 4.4, the spacer 5 is provided in 11.
This is because it is difficult to form an accurate gap in the conventional example shown in FIGS. 5 and 6 because a gap 6 smaller than the irises must be created.

If such a gap 6 is to be made using a mold, the thickness of the mold is at least about 3 am, so it is difficult to form a gap 6 of 1 mm or less.

The embodiment shown in Fig. 4 shows an example in which the spacer 5 is divided into both sides of the plate 2, and in the embodiment shown in Fig. 3, one arcuate spacer 5A is further divided into 5A'' and 58°. This shows that.

〔effect〕

As explained above, according to the present invention, there is provided a disk-shaped plate fixed to a rotating shaft, a pair of inertia rings vulcanized and bonded to both sides of the plate via an elastic body such as rubber, and a pair of inertia rings. A plurality of arc-shaped spacers are inserted between the inertia rings from the outer circumferential side and are divided into at least two parts to form a gap for sealing a high viscosity fluid between them and the plate, and these are integrated by caulking on the outer circumferential sides of the inertia ring and spacer. Since the spacer is divided into two, it is possible to vulcanize and bond not only the elastic body and the plate, but also the inertia ring and the elastic body, and the spacer between the inertia ring and the elastic body. Can prevent liquid leakage. Also,
Since the spacer and the inertia ring are caulked and integrated by the fixing ring, leakage of liquid from the inertia ring and spacer sides can be prevented, and processing costs can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway perspective view showing a preferred embodiment of the present invention, Fig. 2 is a sectional view, Fig. 3 is a sectional view taken along the line ■-■ in Fig. 2,
FIG. 4 is a cross-sectional view showing another embodiment, FIG. 5 is a cross-sectional view of a conventional example before assembly, and FIG. 6 is a cross-sectional view of FIG. 5 after assembly.
FIG. 7 is a sectional view showing another conventional example. ■...Rotating shaft, 2...Plate, 3...Elastic body, 4...Inertia ring, 5...Spacer, 6...Gap, 7...High viscosity fluid, 8.・Fixing ring. Applicant Brideston Co., Ltd. Agent Patent Attorney Masu 1) Takeo Figure 1■'' Figure 3, Figure 4, and Figure 5

Claims (1)

[Claims] 1. A disk-shaped plate fixed to a rotating shaft, a pair of inertia rings vulcanized and bonded to both sides of the plate via an elastic material such as rubber, and an inertia ring from the outer circumference of the inertia ring. A plurality of arc-shaped spacers that are inserted between the rings and are divided into at least two parts to form a gap for sealing a high viscosity fluid between them and the plate, and a fixing device that integrates them by caulking on the outer periphery of the inertia ring and spacer. A torsional damper consisting of a ring.