JPS5940060A - Pulley - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pulley, and more particularly to a pulley with a torsion damper function.

For example, in order to reduce torsional vibrations, a pulley with a torsional damper function may be attached to the crankshaft of an engine on an automobile instead of a normal pulley. This pulley includes a hub fixed to the crankshaft, an outer ring arranged radially outward of the hub and having a groove on its outer periphery, and a damper rubber interposed between the hub and the outer ring. It acts as a torsional damper according to the characteristics determined by the spring constant of the outer ring and the spring constant of the outer ring.

However, recently, there has been an even higher demand for engine vibration reduction, and a more subtle damping effect by a torsion damper is required. Therefore, efforts have been made to eliminate this problem by providing two dampers on the pulley or by changing the weight of the outer ring or the damper rubber or spring constant, but no sufficient effect has been achieved.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a pulley having a torsional damper function that can more effectively damp vibrations of a rotating shaft.

The pulley of the present invention has a cylindrical connecting portion...
It has a plurality of holes opened at intervals in the circumferential direction, and is attached to the outer circumferential surface of the connection part (the cylindrical damper coil that is closely held and the damper coil). In order to communicate the outer ring and the adjacent holes,
Provided at the connection part of or on the outer ring circumferentially.
It is characterized by including a passageway.

According to another feature of the present invention, a cylindrical first damper rubber is closely attached to the outer peripheral surface of the connecting portion of the knob, and a cylindrical first damper rubber is provided on the inner peripheral surface of the connecting portion at intervals in the circumferential direction. A cylindrical second damper comb having a plurality of holes is brought into close contact. The outer ring is attached to the hub via the first damper comb, while the mass is attached to the hub via the second damper comb.

Then, a passageway is provided in the connecting portion or the mass body of the tube in the circumferential direction for communicating the adjacent filter holes.

According to still another feature of the present invention, a plurality of cylindrical first and second cylinders having a ratio are provided on the outer circumferential surface and the inner circumferential surface of the connecting portion of the tube and are spaced apart in the inner circumferential direction. The damper rubber of No. 2 has a closeness i. The outer ring is connected via the first damper rubber.
- Attach to the no., and the mass body is attached to the no. through the second rubber. An orifice is provided in the radial direction at the connecting portion of the damper rubber for communicating the hole in the first damper rubber with the hole in the second damper rubber.

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

The pulley of the present invention includes a hub '10, an outer ring 12, and a damper rubber 14, as shown in FIGS. 1 and 2.

The hub 10 has a central hole 16 and a peripheral cylindrical connection 18 to which a shaft (not shown) is connected.

A groove-shaped passage 20 is provided in the medium heat of the outer circumferential surface 19 of the connecting portion 18 over the entire circumference thereof.

The outer ring 12 is formed into a ring shape as a whole, and has a groove 22 for mounting a bolt over the entire circumference of its outer peripheral surface.

The outer peripheral surface 19 of the connecting portion 18 of these 12 outer rings...
The connection part is connected via the damper comb 14.

The damper comb 14 has a cylindrical shape and has a plurality of holes 24 spaced apart in the circumferential direction.

In the illustrated example, the holes 24 are spaced 90° apart from each other at M-1.
41 [i! ] (Figure 2 shows two of them.) A ring 28 with a hole 26 is attached to the damper rubber 14VC at a position corresponding to the hole 24, and the damper rubber 14 and the ring 28 are , connection part 1 of No.10
8 and the outer ring 12, and is brought into close contact with the connecting portion 18. -C color. From the viewpoint of preventing deformation of the hole 24 during press-fitting, it is preferable to provide a ring 28. And ring 28
If a damper rubber 14 is provided, the damper rubber 14 should be closely connected to the connecting portion 18 between the rings 28 and 28. In this specification, the term "closely" includes such indirect cases.

As a result of press-fitting, the hole 24 is connected to the connection part 18 of the knob 10 and the outer ring 1.
2 constitute an air chamber, and are communicated by a passage 20. However, since the lever passage 20 is covered by the ring 28, it has the same effect as forming an orifice, providing resistance and damping to the air flowing through the passage 20 and into the hole 24 as well.

Instead of the above example, the passage 20 could also be provided on the inner peripheral surface 13 of the outer ring 12.

In the example shown in FIG.
A cylindrical damper comb 30 is closely attached to the inner peripheral surface 17 of the damper comb 9, and a cylindrical damper comb 62 is closely attached to the inner circumferential surface 17 of the cylindrical damper comb 30. The damper rubber 60 is not provided with a hole, and the outer ring 12 is attached to the huff 10 through the damper rubber O. On the other hand, the damper comb 32 has a plurality of holes 64 spaced apart in the circumferential direction. The mass body 36 is attached to the huff 10 via this damper rubber filter 2,
I'm at 1t. The mass filter 6 acts as a torsion damper in cooperation with the damper rubber 32. A passage 38 is provided in the outer circumferential device 67 of this one-purchase bottle 66 in the circumferential direction, and the holes 34 communicate with each other. The passageway 68 could alternatively be provided in the Hough connection 18 as shown.

In the example shown in FIG. 4, a plurality of orifices 40 are provided in the connecting portion 18 of the huff 10 in the radial direction. A damper rubber 46 having a plurality of holes C), 44 drilled at
, 48, please stay close to each other. Number of holes 42 and holes 44
The number of orifices 40 is equal to the number of orifices 40, and the number of matching holes 42.
The spacing of 44 is equal to the spacing of orifices 40;
The holes 42 and 44 are placed in close contact with the connecting portion 18 so as to be positioned diametrically opposite to each other with the orifice 40 in between.

group·? The outer ring 12 is attached to the rubber 46 and the mass body 50 is attached to the damper rubber 48, respectively.

According to the pulley of the present invention, the shirt motor movement can be transferred from the no.
When the vibration is transmitted to the mass body through the damper comb, the outer ring, and the second damper rubber, the vibration is attenuated by the torsional damper action. Moreover, when the damper rubber is deformed by compressive or tensile loads, a change in the volume occupied by the holes occurs, and the air within the holes is moved through the passages or offices to other holes, damping vibrations. In this way, a more effective damping effect can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the upper half of the first example of the pulley of the present invention, FIG. 2 is a sectional view taken along line 2-2 in FIG. 1, and FIGS. 6 and 4 are FIG. 7 is a sectional view of the upper half of the second and sixth examples of the present invention. 18: Connection part, 20. Ro 8 2 passages, 24, Ro 4, 42.44: Ishi. 6,50: Mass body. Agent Patent Attorney Nobuyuki Matsunaga Figure 1 Figure 2

Claims (3)

[Claims] (1) a hub having a cylindrical connection part; a cylindrical Dan-ξ comb having a plurality of holes spaced apart in the circumferential direction and closely attached to the outer peripheral surface of the connection part; An outer ring attached to the hub via the damper rubber and a mixing ring that communicates the adjacent filter holes (including a connecting portion of the buzz or a passage provided across the outer ring in the circumferential direction 1); Pulley. (2) A hub having a cylindrical connection part, a cylindrical first damper ξ rubber that is closely attached to the outer peripheral surface of the connection part, and an outer ring that is attached to the hub via the first damper rubber. , a cylindrical second damper rubber having a plurality of holes opened at intervals in the circumferential direction and closely fitted to the inner circumferential surface of the connecting portion; A pulley comprising an attached mass and a passage provided circumferentially in the connection portion of the hub or in the mass for communicating the adjacent holes. (3) A hub having a cylindrical connection part, and a cylindrical hub having a plurality of holes opened at intervals in the circumferential direction, the hub having a cylindrical connection part and having a plurality of holes opened at intervals in the circumferential direction, the hub having a cylindrical connection part and having a plurality of holes formed at intervals in the circumferential direction, the hub having a cylindrical connection part. a first and a second damper rubber, an outer ring that is attached to the hub via the first damper rubber, a mass body that is attached to the hub via the second damper rubber, and a mass body that is attached to the hub via the second damper rubber;
and an orifice provided in the connecting portion of the hub in the radial direction to communicate the hole in the damper rubber with the hole in the second damper rubber.