JPH0577625U - Damper disk - Google Patents

Abstract

(57) [Abstract] [Purpose] To secure a desired torsional rigidity in a damper disk with a wide torsion angle range. The damper disk includes a hub 1, at least two torsion springs 8, a float body 17,
An annular plate member 11 and a clutch plate 6 and a retaining plate 7 as an input side rotating body are provided.
The hub 1 is connected to the output side member and has side plates 3 and 4 on the outer peripheral side as flange portions in which a plurality of circumferentially extending window holes 3a and 4a are formed. The outer circumference side torsion springs 8 are arranged in series in the window holes 3a, 4a of the side plates 3, 4 in the circumferential direction. The float body 17 is arranged between the two outer peripheral side torsion springs 8 so as to be movable in the circumferential direction. The annular plate member 11 is arranged on the side of the side plates 3 and 4, and supports each float body 17 rotatably within the circumferential surface.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a damper disc used for a clutch disc of an automobile or the like, and more particularly to a damper disc having a wide torsion angle range.

[0002]

[Prior Art]

 In order to reduce the muffled noise during low-speed traveling of a damper disk, it is generally necessary to keep the torsional rigidity low and set the torsional angle range wide. Therefore, conventionally, two torsion springs are arranged in series in the circumferential direction in one window hole of the flange on the output side member side, and the float body is arranged between the torsion springs. It is being appreciated. As a result, a wide twist angle can be obtained with a relatively low torsional rigidity, and therefore muffled noise can be reduced during low speed running.

A conventional damper disk of this type is disclosed in Japanese Utility Model Application Laid-Open No. 1-141931 filed by the present applicant. In this damper disk, each float body is fixed to a pair of annular connecting bodies arranged on both sides.

[0004]

[Problems to be solved by the device]

 In the conventional damper disc, each float body is fixed to an annular connecting body. Therefore, when the torsion spring is unevenly contacted with the float body, it becomes difficult for the end surface of the torsion spring and the float body to come into close contact with each other. Then, the load setting of the torsion spring becomes incorrect, and the desired torsional characteristics cannot be obtained.

An object of the present invention is to secure a desired torsional rigidity in a damper disk having a wide torsion angle range.

[0006]

[Means for Solving the Problems]

 A damper disk according to the present invention includes a hub, at least two torsion springs, a float body, an annular member, and an input side rotating body. The hub has a flange portion formed with a plurality of window holes extending in the circumferential direction on the outer peripheral side, and is connected to the output side member. The at least two torsion springs are arranged in series in the circumferential direction in each window hole of the flange portion. The float body is arranged between two torsion springs so as to be movable in the circumferential direction. The annular member is arranged laterally of the flange portion, and supports the float body so as to be rotatable within the circumferential surface. The input side rotating body is connected to the flange portion via a torsion spring.

[0007]

[Action]

 In the damper disc according to the present invention, when the input member rotates, the plurality of torsion springs arranged in the window holes of the flange portion are compressed. At this time, if there are two torsion springs, for example, the rotation angle of the float body is half the rotation angle of the input member. As a result, it is possible to obtain a wide torsion angle range with relatively low torsional rigidity.

Since the float body is rotatably supported by the annular member within the circumferential surface, even if the inner circumferential end of the end surface of one of the torsion springs is not in close contact with the float body, The rotation of the body improves the adhesion between the torsion spring and the float body. As a result, the bias of the torsion spring is reduced, and the desired torsional characteristics can be obtained.

[0009]

【Example】

 1 and 2 show a damper disk according to an embodiment of the present invention. In FIG. 2, OO is the rotation center line. At the center of this damper disk, a hub 1 is arranged which is connected to a shaft (not shown) of a transmission as an output member. The hub 1 has a spline hole 1a at the center thereof. Further, the hub 1 is integrally formed with a flange portion 2 projecting to the outer peripheral side. On the outer circumference of the flange portion 2, notches 2a for accommodating an inner circumference side torsion spring 5 (described later) are formed at three circumferentially equidistant intervals. Further, three abutting cutouts 2b are formed at equal intervals between the adjacent cutouts 2a.

On the other hand, a pair of side plates 3 and 4 is arranged on both sides of the flange portion 2. The pair of side plates 3 and 4 are plate members that are rotatably arranged on the outer peripheral side of the hub 1 and have a substantially disk shape. The outer peripheries of the pair of side plates 3 and 4 are in contact with each other and are fixed by rivets 31 as shown in FIG. The side plates 3 and 4 are formed with three window holes 3a and 4a, respectively, which are formed at a predetermined angle in the circumferential direction and open outward in the radial direction. Spring supports 3b and 4b slightly extending in the circumferential direction are formed at the outer peripheral ends of the window holes 3a and 4a, respectively. In each of the window holes 3a and 4a, two outer circumferential side torsion springs 8 arranged in series in the circumferential direction are arranged. The outer peripheral torsion spring 8 is composed of two kinds of springs 8a and 8b, respectively.

Further, contact portions 3c and 4c arranged in the contact notches 2b of the flange portion 2 are formed on the inner peripheral portions of the pair of side plates 3 and 4, respectively. A float body 17 is arranged between the two outer peripheral side torsion springs 8 arranged in one window hole 3a, 4a. As shown in FIG. 4, the float body 17 has a triangular shape in which the width in the circumferential direction becomes narrower toward the inner side in the radial direction, and both oblique sides contacting the outer circumferential side torsion spring 8 are provided. 17a is formed so as to be substantially parallel to the radial walls of the opposing window holes 3a and 4a. A projecting portion 17b is formed on both end surfaces of the float body 17 in the axial direction, and a hole 17c penetrating in the axial direction is formed in the projecting portion 17b. The pin 18 is inserted into the hole 17c. On the other hand, as is apparent from FIG. 2, a pair of annular plate members 11 is arranged so as to be substantially flush with both axial ends of the hub 1. Both ends of the pin 18 are rotatably supported by the annular plate member 11 within the circumferential surface. That is, the float body 17 is rotatable about the pin 18 in the state of FIG.

Supporting portions 17 d projecting in the circumferential direction are formed at both ends on the outer peripheral side of the float body 17, and together with the spring receivers 3 b and 4 b of the side plates 3 and 4, the outer peripheral side twisting spring 8 is formed. The outer peripheral end is supported to prevent the outer peripheral side torsion spring 8 from projecting radially outward from the window holes 3a, 4a. A clutch plate 6 and a retaining plate 7 as an input side rotating body are arranged on the outer sides of the side plates 3 and 4 in the axial direction. The clutch plate 6 and the retaining plate 7 are a pair of substantially disk-shaped members, and are rotatably engaged with the outer peripheral side of the hub 1. The clutch plate 6 and the retaining plate 7 are fixed on the outer peripheral portion by a plurality of rivets 9, and the rivet 9 further connects the friction facing 10 to the outer peripheral portion via the cushioning plate. The clutch plate 6 and the retaining plate 7 are formed with spring accommodating cut-and-raised portions 3e, 4e which project axially outwardly corresponding to the window holes 3a, 4a of the side plates 3, 4, respectively. An outer circumference side torsion spring 8 is housed in the spring housing cut-and-raised parts 3e, 4e. That is, the retaining plate 7 and the clutch plate 6 are connected to the side plates 3 and 4 via the outer peripheral side torsion spring 8.

As shown in FIGS. 2 and 3, a first friction member 21 is arranged between the flange portion 2 and the inner peripheral edge of the side plate 3, and the first friction member 21 is disposed between the flange portion 2 and the side plate 4. The second friction member 22 is arranged between the peripheral edge and the peripheral edge. These friction members 21, 22 are set so that a small hysteresis torque in the first step is generated when the side plates 3, 4 rotate relative to the flange portion 2.

An annular third friction member 23 is arranged between the inner peripheral end of the clutch plate 6 and the inner peripheral end of the side plate 3. Further, between the retaining plate 7 and the inner peripheral end of the side plate 4, an annular cone spring 24, a friction plate 25 which is prevented from rotating by the retaining plate 7 and The fourth friction member 26 is arranged. Due to the cone spring 24 and the third friction member 23 and the fourth friction member 26, when a relative rotation occurs between the clutch plate 6 and the retaining plate 7 and the side plates 3 and 4, a large hysteresis torque in the second stage is generated. It is set to occur.

With the above settings, for example, the outer peripheral side torsion spring 8 may be biased to the oblique side portion 17 of the float body 17. In this case, in this embodiment, the float body 17 rotates about the pin 18 in the circumferential surface, so that the adhesion between the outer circumference torsion spring 8 and the oblique side portion 17a of the float body 17 is improved. As a result, desired torsional characteristics can be obtained during compression of the outer circumferential side torsion spring 8 described below.

When the torque is transmitted to the friction facing 10, the torque is transmitted to the clutch plate 6 and the retaining plate 7 as the input side rotating body. Then, the torque transmitted to these plates 6 and 7 is transmitted to the side plates 3 and 4 via the outer peripheral side torsion spring 8 and further transmitted to the hub 1. At this time, when the load is low, the portion having the lowest rigidity, that is, the inner peripheral side torsion spring 5 is compressed, and the torsion angle-torsion torque characteristic according to the spring characteristic is obtained.

When the transmission torque becomes large due to a high load, the inner peripheral side torsion spring 5 is further compressed, and the inner peripheral side protruding portions 3c, 4c of the side plates 3, 4 are cut out 2b in the flange portion 2. Abut the side wall of. As a result, the side plates 3 and 4 and the hub 1 are integrated. Next, when the load is further increased, relative rotation occurs between the clutch plate 6 and the retaining plate 7 and the side plates 3 and 4. The plates 6 and 7 compress the outer circumferential torsion spring 8 as the torsion angle increases. At this time, if the twisting angle of the plates 6 and 7 is 16 °, for example, the float body 17 and the annular plate member 11 rotate by half that amount, 8 °. The twist angle increases until the outer circumferential torsion spring 8 is compressed and comes into close contact. After that, the clutch plate 6 and the retaining plate 7 are integrated with the side plates 3 and 4 through the compressed outer peripheral side torsion spring 8 and the float body 17.

When the outer circumferential side torsion springs 8 are compressed, as described above, the adhesion between the outer circumferential side torsion springs 8 and the float body 17 is improved, so that the load The desired torsional properties are obtained according to the multiple setting. In the structure in which the float body 17 is not fixed to the annular plate member 11 but to the plate arranged on the inner peripheral side, the degree of freedom in designing the outer peripheral torsion spring is small. That is, the resultant force of the pressing force from the spring and the centrifugal force is applied to the float body, and in order to withstand this resultant force, it is necessary to secure a large width of the portion of the float body connected to the plate. This limits the length of the spring. However, in this embodiment, since the float body 17 is supported by the annular plate member, the above problem does not occur, and the degree of freedom in designing the outer circumference torsion spring is improved.

In this embodiment, the window holes 3a and 4a are opened outward in the radial direction, that is, the supporting frame is omitted. Therefore, the outer diameter of the outer peripheral side torsion spring 8 can be increased, and the torque capacity is increased.

[0020]

[Effect of the device]

 In the damper disk according to the present invention, the float body arranged between the torsion springs is rotatably supported on the annular member arranged on the side of the float body in the circumferential surface. Therefore, by rotating the float body in the circumferential surface, the adhesion between the torsion spring and the float body can be improved. As a result, the desired torsional characteristics of the torsion spring are obtained.

[Brief description of drawings]

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

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a sectional view taken along the line III-III in FIG.

FIG. 4 is a perspective view of a float body.

[Explanation of symbols]

 1 hub 2 flange part 3,4 side plate 3a, 4a window hole 6 clutch plate 7 retaining plate 10 friction facing 11 plate member 17 float body

Claims (1)

[Scope of utility model registration request] 1. A hub having a flange having a plurality of circumferentially extending window holes formed on the outer peripheral side thereof, the hub being connected to an output side member, and a series in the circumferential direction in each of the window holes of the flange. At least two torsion springs arranged side by side, a float body movably arranged in the circumferential direction between the at least two torsion springs, a float body arranged laterally of the flange, and each float body being circled. A damper disk comprising: an annular member that is rotatably supported in a peripheral surface; and an input side rotating body that is connected to the flange via the torsion spring.