JPS60192127A - Damper disc - Google Patents

Abstract

PURPOSE:To aim at absorption of a wide-angle torsion vibration with an elastic body being small in its elastic value, by interposing the elastic body capable of expansion and contraction in its circumferential direction, between an internal roller and a planetary carrier. CONSTITUTION:A circular spring holder 11 is tightly attached to a part of a carrier 8 between each of planetary gears 7, and each spring fitting hole 12 is formed in the peripheral side of each holder 11. Likewise, each U-shaped plate spring 15 is elastically fitted in each fitting hole 12, and a free end part at the peripheral end side of each spring 15 is engaged with a notch part 16 of an internal roller 9. With this constitution, an angle of torsion between the planetary carrier 8 and the internal roller 9 is reduced to that torsion to be produced betwen an input member 1 and an output member 2 whereby the plate spring 15 is compressed or pulled up as much as an extent equivalent to the decreased angle of torsion. Therefore, a wide-angle torsional vibration is absorbable by an elastic body being small in its elastic value.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a damper disk used for coupling an automobile engine and a transmission. Of course, the damper disk also includes the clutch disk.

(Prior art) A conventional damper disk has an elastic body that expands and contracts in the circumferential direction arranged between an input member and an output member in a series type, parallel type, or a combination of series and parallel type, and a screw thread between the two members. It is constructed so that vibrations are directly absorbed by the elastic body. This is a so-called direct acting type.

In order to be able to absorb wide thread polygons in a direct-acting damper like the one mentioned above, it is necessary to arrange several types of elastic bodies so that they operate in stages, or to use elastic bodies with a large amount of expansion and contraction. It is necessary to place it. However, since there is a space limitation within the damper disk, the number and size of the elastic bodies are limited, and it is therefore difficult to accommodate wide thread polygons.

(Objective of the Invention) It is an object of the invention to make it possible to absorb wide-angle screw vibrations without increasing the number or size of elastic bodies by using a planetary rotating body mechanism.

(Structure of the Invention) In the damper disk of the present invention, a planetary rotating body mechanism is arranged between an input member and an output member, a sun rotating body is connected to the input member so as to be freely rotatable, and an internal rotating body is connected to the output member. A planetary rotating body that is integrally rotatably connected and rotatably supported by a planetary carrier is brought into contact with the inner circumferential side of the internal rotating body of the planetary rotating body mechanism, and is also brought into contact with the outer circumferential side of the solar rotating body, The planetary carrier is rotatably provided with respect to the input member and the output member, and an elastic body that can be expanded and contracted in the circumferential direction is interposed between the internal rotating body and the planetary carrier.

(First Embodiment) In FIG. 1 showing a vertical cross-sectional view of a damper disk to which the present invention is applied, 1 is an input side spline hub, which is connected, for example, to the drive shaft of an automobile engine, and 2
is an output side facing, which is fixed to the support plate 8 and connected to, for example, an input shaft of a transmission mechanism (not shown).

Planetary roller mechanism 5 provided between hub 1 and plate 3
is equipped with a sun roller 6, a planetary loaf 7, a planetary carrier 8, and an internal roller 9.

The solar loaf 6 is formed integrally with the hub 1.

A pair of planetary carriers 8 are arranged on both sides of the sun roller 6 and are rotatably fitted to the outer peripheral surface of the hub, and the pair of carriers 8 are connected to each other by a plurality of pins 10 so as to be able to rotate integrally with each other. There is. The internal roller 9 is formed into an annular shape and is connected to the collar 1 by a plurality of connecting pins 18.
It is sandwiched between a pair of output-side annular plates 14 via 8a.

The annular plate 14 is rotatably fitted around the outer periphery of the hub 1, and the support plate 3 is fixed to the outer periphery end of one plate 14.

As shown in FIG. 2, the carrier 8 is provided with, for example, three pins 10 at equal intervals in the circumferential direction.
A planetary roller 7 is rotatably supported in each. The planetary roller 7 is in contact with the outer peripheral surface of the sun roller 6 and the inner peripheral surface of the internal roller 9 with strong pressure.

An arcuate spring holder 11 is riveted to the carrier 8 portion between each planetary rollerf) 11aK, and a front and rear circular (approximately U-shaped) plate spring 15 is fitted so as to be expandable and retractable in the circumferential direction. . That is, the circular portion (arc-shaped portion) of the spring 15 is fitted into the fitting hole 12, and the free end portion extends toward the outer circumference.

A free end portion on the outer peripheral side of the spring 12 is engaged with a notch 16 of the internal roller 9.

(Function) When the hub 1 on the input side rotates in the direction of arrow R in FIG. The internal roller 9 and the annular plate 14 also rotate in the direction of arrow R, and power is transmitted to the mission mechanism via the support plate V-) 8 and the facing 2.

Next, the screwing action due to torque fluctuations of the hub 1 will be explained. However, to make the explanation easier to understand, 7 on the output side
Assuming that the acing 2 is fixed unrotatably, a case will be described in which the hub 1 is twisted, for example, in the direction of arrow R with respect to the fixed acing 2.

When the hub 1 rotates (twists) in the direction of arrow R relative to the facing 2, the internal roller 9 is fixed together with the brake 14 and the facing 2, so that the sun roller 6 rotates in the direction of the arrow R relative to the internal roller 9. As a result of the rotation (threading), each planetary roller 7 rotates ten times in the direction of arrow P, and also moves (transfers) the inner circumferential surface of internal roller 9 in the direction of arrow R. Planetary roller 7
As the carrier 8 moves in the direction of the arrow P, the carrier 8 also rotates in the direction of the arrow R at the same speed as the planetary roller 7. The rotation of the carrier 8 in the direction of arrow R is slower than the rotation of the sun roller 6 due to the planetary principle, and the rotation angle W of the carrier 8 is also smaller than the rotation angle W2 of the sun roller 6. . For example, the inner diameter of the internal roller 9 is C1, the outer diameter of the sun roller 6 is A
Then, the reduction A + OA angle ratio is -, and the rotation angle W1 of the carrier 8 is A + CXW.
, becomes.

As the carrier 8 rotates in the direction of arrow R relative to the internal roller 9, the spring 1 is released between the notch 16 of the internal roller 9 and the insertion hole 12 of the carrier 8 (holder 11).
5 is compressed in the circumferential direction, and torsional torque is absorbed.

(Second Embodiment) The example shown in FIGS. 3 and 4 is an example in which a coil spring 25 is used as the elastic body. That is, the coil p-spring 25 is fitted into the spring fitting hole 12 of the holder 11 of the carrier 8 so as to be expandable and contractible in the circumferential direction, and the outer circumferential portion of the spring 25 is fitted into the notch 16 of the internal roller 9.

The rest of the 13ir structure is similar to that shown in FIGS. 1 and 2, and parts corresponding to those in FIGS. 1 and 2 are given the same numbers as in FIGS. 1 and 2.

(Other Examples) (1) A planetary gear mechanism may be used as the planetary rotating body mechanism. That is, a sun gear, an idle gear, and an internal gear are used instead of the sun roller, planetary roller, and internal roller.

(2) Rubber can also be used as the elastic body.

(3) The number of elastic bodies may be two or more than two.

(4) The elastic bodies may be arranged not only in series in the circumferential direction but also in parallel. Further, when the number of elastic bodies is four or more, they may be arranged in a combination of series and parallel.

(Effects of the invention) (1) A planetary rotating body mechanism is arranged between an input member and an output member, a solar rotating body is connected to the input member, an internal rotating body is connected to the output member, and the internal rotating body and Since an elastic body that can be expanded and contracted in the circumferential direction is interposed between the planet carriers 8, the rotation angle between the planet carriers 8 and the internal rotating body is The twist angle is reduced, and the elastic body is compressed or stretched by an amount corresponding to the reduced twist angle. Therefore, wide-angle screw vibration can be absorbed by the elastic body with a small amount of expansion and contraction.

That is, it becomes possible to absorb wide-angle screws without increasing the size of the elastic body, and the vibration ah absorption effect and abnormal noise prevention effect are improved.

(2) Since the internal rotating body located on the outermost side of the planetary rotating body mechanism is connected to the output member, and the solar rotating body located on the innermost side is connected to the input member, the carrier 8 to an input member or an output member, the connection structure is simpler and the connection work (assembly work) is also easier.

[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 is a longitudinal cross-sectional view showing a first embodiment of the present invention, Fig. 2 is a cross-sectional view taken along line II in Fig. 1, and Fig. 3 is a longitudinal cross-sectional view of the second embodiment. , FIG. 4 is a sectional view taken along line W-ff in FIG. 3. DESCRIPTION OF SYMBOLS 1... Hub (an example of an input member), 2... Facing V ring (an example of an output member), 5... Planetary roller mechanism (an example of a planetary rotating body mechanism), 6... Sun roller (a sun roller example of a rotating body),
7... Planetary roller (an example of a planetary rotating body), 8... Planetary carrier, 9... Internal roller (an example of an internal rotating body), 15... Leaf spring (an example of an elastic body)
, 25...Carp μ spring (another example of an elastic body) Fig. 3 2V ''V Fig. 4

Claims (1)

[Claims] A planetary rotating body mechanism is placed between the input member and the output member, the sun rotating body is integrally and rotatably connected to the input member, the internal rotating body is integrally and rotatably connected to the output member, and the planetary carrier is rotatably connected to the input member. The planetary rotating body supported by the planetary rotating body is brought into contact with the inner circumferential side of the internal rotating body of the planetary rotating body mechanism and the outer circumferential side of the sun rotating body, and the planetary carrier is rotated relative to the input member and the output member. A damper disk characterized in that an elastic body that can be expanded and contracted in the circumferential direction is interposed between an internal rotating body and a planetary carrier.