JP2017133613A - Torque fluctuation absorption device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a torque fluctuation absorption device which permits miniaturization and reduction in weight by providing sufficient torque fluctuation absorption characteristic without enlarging a damper spring, in the torque fluctuation absorption device causing the coil-shaped damper spring to be contracted against a spring receiving member which permits contacting and separation for a holder plate side opening part and a driven plate side opening part along a circumferential direction of a holder plate and a driven plate.SOLUTION: A fulcrum part and a semicircular surface 41 to be supported are formed on a spring receiving member 35, a swing support part for swingably supporting one side fulcrum 39 of a pair of spring receiving members 35 upon relative rotation of the holder plates 5, 6 and the driven plate is formed on an end part of the driven plate side opening part and a semicircular support surface 42 for rotatably supporting the other side spring receiving member 35 while being brought into sliding contact with the surface 41 to be supported of the other side spring receiving member 35 upon relative rotation is formed on an end part of the holder plate side opening parts 30, 31.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a holder plate that is linked and connected to a drive source and has a holder plate side opening, and a driven plate side opening corresponding to the holder plate side opening and a power between the holder plate and the holder plate. A driven plate that is arranged coaxially with the holder plate to enable transmission, and spaced in the circumferential direction of the holder plate and the driven plate while straddling between the holder plate side opening and the driven plate side opening. A spring receiving member that is arranged to form a pair and that can contact and separate from the end of the holder plate side opening and the driven plate side opening along the circumferential direction, and the spring receivers thereof The present invention relates to a torque fluctuation absorber including a coil-shaped damper spring that is contracted between members.

  Such a torque fluctuation absorber is already known from Patent Document 1, in which one of the pair of spring receiving members is placed at the end of the opening on the holder plate side when the holder plate and the driven plate are rotated relative to each other. The first swing support portion formed is swingably supported, and the other of the pair of spring receiving members is swingable by a second swing support portion formed at the end of the driven plate side opening. It is supported by.

JP 2012-67877 A

  However, in the one disclosed in Patent Document 1, when the relative rotation amount of the holder plate and the driven plate is increased, the coiled damper spring between the pair of spring receiving members is compressed so as to be bent in a substantially “eight” shape. The stress applied to the damper spring was high. For this reason, unless the damper spring is increased in size, sufficient torque fluctuation absorption characteristics cannot be obtained, resulting in an increase in the size and weight of the torque fluctuation absorber.

  The present invention has been made in view of such circumstances, and provides a torque fluctuation absorbing device that is reduced in size and weight so that sufficient torque fluctuation absorption characteristics can be obtained without increasing the size of a damper spring. The purpose is to do.

  In order to achieve the above object, the present invention has a holder plate that is linked and connected to a drive source and has a holder plate side opening, a driven plate side opening corresponding to the holder plate side opening, and the A driven plate disposed coaxially with the holder plate to enable power transmission between the holder plate, the holder plate side opening and the holder plate while straddling between the driven plate side opening and A spring that is arranged so as to be paired apart in the circumferential direction of the driven plate and that allows contact with and separation from the holder plate side opening and the end of the driven plate side opening along the circumferential direction A tor provided with a receiving member and a coiled damper spring that is contracted between the spring receiving members In the fluctuation absorbing device, a fulcrum portion and a semicircular supported surface are formed on the spring receiving member, and at the end of the driven plate side opening, the holder plate and the driven plate are relatively rotated. A swing support portion for swingably supporting one of the fulcrum portions of the pair of spring receiving members is formed, and the end portions of the holder plate side opening are provided with the pair of spring support portions during the relative rotation. A semicircular support surface is formed in contact with the other supported surface of the member to rotatably support the other spring receiving member.

  According to the above feature of the present invention, at the time of relative rotation of the holder plate and the driven plate, one of the spring receiving members is swingably supported by the swing support portion at the end of the driven plate side opening of the driven plate, Since the other spring receiving member is rotatably supported by a semicircular support surface at the end of the holder plate side opening of the holder plate, the coiled damper spring can be compressed along its axis. Thus, the stress applied to the damper spring can be reduced, and a sufficient torque fluctuation absorbing characteristic can be obtained without requiring an increase in the size of the damper spring. As a result, the torque fluctuation absorbing device can be made compact and lightweight.

It is a longitudinal cross-sectional view of a torque fluctuation absorber. FIG. 2 is a sectional view taken along line 2-2 of FIG. FIG. 3 is a sectional view taken along line 3-3 in FIG. 1. It is a front view of a spring receiving member. FIG. 5 is a sectional view taken along line 5-5 of FIG. FIG. 6 is a view taken along arrow 6 in FIG. 5. FIG. 7 is a cross-sectional view taken along line 7-7 in FIG. 1. It is a figure which shows the part which follows the 8-8 line | wire of FIG. 1 at the time of non-relative rotation (a) and the time of relative rotation (b).

  Hereinafter, an embodiment of the present invention will be described with reference to the attached FIGS. 1 to 8. First, in FIG. 1, this torque fluctuation absorber is an engine (not shown) as a drive source mounted on a vehicle. ) And a transmission (not shown), and the first and second holder plates 5 and 6 to which power is transmitted from the engine can be rotated relative to the holder plates 5 and 6. And a driven plate 7 connected to the mission side.

  The outer peripheral portion of the drive plate 10 fastened to the engine-side rotating shaft 8 with a plurality of bolts 9 is a first mass ring 11 and a second mass sandwiching the drive plate 10 between the first mass ring 11. Fastened to the ring 12 by a plurality of bolts 13 arranged at intervals in the circumferential direction, and between the first and second mass rings 11, 12, the first and second holder plates 5, 6 side An annular recess 14 that is open toward is formed.

  The second holder plate 6 integrally has an annular projecting portion 6 a that projects radially outward from the outer periphery of the first holder plate 5 and is partially accommodated in the annular recess 14. The outer peripheral portion of one holder plate 5 is coupled to the inner peripheral portion of the annular projecting portion 6a. Further, a first friction material 15 and a second friction material 16 that are in contact with the first mass ring 11 are respectively attached to both surfaces of the annular projecting portion 6a. Is provided between the ring-shaped pressing plate 17 and the second mass ring 12. Since the first friction material 15 is pressed against the first mass ring 11 and the second friction material 16 is pressed against the pressing plate 17 by the spring force exerted by the leaf spring 18, the first and second The second holder plate 6 rotates following the mass rings 11 and 12, and the rotational power from the engine-side rotating shaft 8 is transmitted to the first and second holder plates 5 and 6.

  The inner peripheral portion of the driven plate 7 is fixed to the outer periphery of a cylindrical boss member 20 that is coaxially fixed to the mission-side rotating shaft 18, and the driven plate 7 includes first and second holder plates 5, 6. Between the first and second holder plates 5 and 6 so that power can be transmitted between them.

  An inner peripheral portion of the first holder plate 5 is supported by a first cylindrical member 23 having an outward flange portion 23a that is in contact with one surface of the driven plate 7 near the boss member 20 via a sliding material 21. In addition, the inner peripheral portion of the second holder plate 6 is a second cylindrical member that integrally has an outward flange 24a that is in contact with the other surface of the driven plate 7 near the boss member 20 via a sliding member 22. 24. In addition, a leaf spring 25 that exerts a spring force that presses the sliding material 21 against the driven plate 7 is interposed between the outward flange 23 a of the first cylindrical member 23 and the first holder plate 5. Is done.

  Referring also to FIG. 2, restriction protrusions 28 that protrude outward in the radial direction are integrally provided at a plurality of locations spaced in the circumferential direction on the outer periphery of the driven plate 7, and the second holder plate 6 is formed with a regulation recess 29 for accommodating the regulation projection 28. The restriction recess 29 is formed to be larger than the restriction protrusion 28 along the circumferential direction of the second holder plate 6, and the restriction protrusion 28 extends along the circumferential direction of the second holder plate 6. By contacting both ends of the restriction recess 29, the relative rotation range of the driven plate 7 with respect to the first and second holder plates 5 and 6 is restricted.

  Referring also to FIG. 3, the first and second holder plates 5, 6 are formed in a long hole shape extending in the circumferential direction of the holder plates 5, 6 and are aligned in the axial direction. A plurality of, for example, four first and second holder plate side openings 30, 31 are formed in the circumferential direction, and a driven plate side opening 32 corresponding to the holder plate side openings 30, 31 is formed. The driven plate 7 is formed so as to extend long in the circumferential direction of the driven plate 7.

  The first holder plate 5 is integrally formed with a bulging portion 33 that bulges on the opposite side of the driven plate 7 so as to form an opening edge of the first holder plate side opening 30. The second holder plate 6 is integrally formed with a bulging portion 34 that bulges on the opposite side of the driven plate 7 so as to form an opening edge of the second holder plate side opening 31. .

  A synthetic resin spring receiving member 35 straddling the first holder plate side opening 30, the driven plate side opening 32, and the second holder plate side opening 31 includes the first holder plate 5, the driven The first holder plate side opening 30, the driven plate side opening 32 and the second holder plate side opening 31 along the circumferential direction of the plate 7 and the second holder plate 6 can be brought into contact with and separated from the ends. However, it arrange | positions so that it may separate in the said circumferential direction and may make a pair. In addition, a coiled damper spring 36 is contracted between the pair of spring receiving members 35.

  4 to 6 together, the spring receiving member 35 is integrally provided with a spring support cylinder portion 37 inserted into the end portion of the damper spring 36, and the spring support cylinder portion. A groove 38 disposed on the opposite side of 37 is formed so as to accommodate the edge of the driven plate side opening 32 along the circumferential direction of the driven plate 7. In addition, a fulcrum part 39 disposed in the groove 38 is formed integrally with the spring receiving member 35 with a semicircular cross-sectional shape, and the driven plate side opening 32 along the circumferential direction of the driven plate 7. To support the one fulcrum portion 39 of the pair of spring receiving members 35 in a swingable manner when the first and second holder plates 5 and 6 and the driven plate 7 are rotated relative to each other. The swing support portion 40 is formed so as to be recessed in a semicircular shape.

  The fulcrum portion 39 of the pair of spring receiving members 35 is shown in FIG. 2A in a state in which no relative rotation occurs between the first and second holder plates 5 and 6 and the driven plate 7. As shown in the figure, it is supported by the swing support portions 40 at both ends of the driven plate side opening 32 along the circumferential direction of the driven plate 7 so as to be swingable.

  Referring also to FIG. 7, the spring receiving member 35 is provided with the groove so that a cross-sectional shape along a plane orthogonal to the rotation axis of the first and second holder plates 5 and 6 is a semicircular shape. A supported surface 41 is formed on both sides of 38. On the other hand, the end portions of the first and second holder plate side openings 30, 31 along the circumferential direction of the first and second holder plates 5, 6 are connected to the first and second holder plates 5, 6, A semicircular support surface for slidingly contacting the other supported surface 41 of the pair of spring receiving members 38 and rotatably supporting the other spring receiving member 35 during relative rotation with the driven plate 7. In this embodiment, the first and second holder plates 5, 6 are formed so as to form the opening edges of the first and second holder plate side openings 30, 31. The support surface 42 is formed on the inner surfaces of the bulging portions 33 and 34 that are integrally formed.

  The supported surfaces 41 of the pair of spring receiving members 35 are relatively rotated between the first and second holder plates 5 and 6 and the driven plate 7 as shown in FIG. In a state where the first and second holder plates 5 and 6 are not in contact with each other, they are in contact with the support surfaces 42 at both ends of the first and second holder plate side openings 30 and 31 along the circumferential direction of the first and second holder plates 5 and 6, respectively. When the first and second holder plates 5 and 6 rotate relative to the driven plate 7 in the relative rotation direction indicated by the arrow 45 in FIG. 8B, the fulcrum 39 of one spring receiving member 35 The driven plate side opening 32 is supported so as to be swingable by the swing support portion 40 at the front end portion in the relative rotation direction 45 of the driven plate side opening portion 32, and the other spring receiving member 35 opens the supported surface 41 of the driven plate side opening. Part 32 It moves so as to approach the rear end portion of the support surface 42 the one of the spring receiving member 35 rotates while sliding while compressing the damper spring 36 in the relative rotational direction 45.

  Next, the operation of this embodiment will be described. First and second holder plate side openings 30, 31 are formed in the first and second holder plates 5, 6, respectively, and the first and second holders are formed. A driven plate side opening 32 is formed in the driven plate 7 disposed between the plates 5 and 6, and the first holder plate side opening 30, the driven plate side opening 32, and the second holder plate side opening 31. The first holder plate side opening 30, the driven plate side opening 32, and the second along the circumferential direction of the first holder plate 5, the driven plate 7, and the second holder plate 6 while straddling them. The spring receiving member 35 that enables contact with and separation from the end of the holder plate side opening 31 is disposed so as to form a pair separated in the circumferential direction, Coiled damper springs 36 are under compression between these spring receiving member 35. Moreover, a fulcrum part 39 and a semicircular supported surface 41 are formed on the spring receiving member 35, and the first and second holder plates 5, 6 are driven at the end of the driven plate side opening 32. A swing support portion 40 for swingably supporting one fulcrum portion 39 of the pair of spring receiving members 35 at the time of relative rotation with the plate 7 is formed, and the first and second holder plate side openings 30 are formed. , 31 is a semicircle for slidably contacting the other supported surface 41 of the pair of spring receiving members 35 and rotatably supporting the other spring receiving member 35 during the relative rotation. A shaped support surface 42 is formed. As a result, when relative rotation occurs between the first and second holder plates 5, 6 and the driven plate 7, the damper spring 36 can be compressed along the axis thereof. This stress can be reduced, and a sufficient torque fluctuation absorbing characteristic can be obtained without requiring an increase in the size of the damper spring 36. As a result, the torque fluctuation absorbing device can be made compact and lightweight.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the present invention described in the claims. Is possible.

5, 6 ... Holder plate 7 ... Driven plate 30, 31 ... Holder plate side opening 32 ... Driven plate side opening 35 ... Spring receiving member 36 ... Damper spring 39 ...・ Supporting point part 40 ... Oscillating support part 41 ... Supported surface 42 ... Support surface

Claims (1)

  A holder plate (5, 6) interlocked and connected to the drive source and having a holder plate side opening (30, 31), and a driven plate side opening (30, 31) corresponding to the holder plate side opening (30, 31) 32) and a driven plate (7) arranged coaxially with the holder plate (5, 6) to enable power transmission between the holder plate (5, 6) and the opening on the holder plate side (30, 31) and the driven plate side opening (32) while straddling between the holder plate (5, 6) and the driven plate (7) along the circumferential direction of the holder plate side opening ( 30, 31) and the driven plate side opening (32) can be contacted / separated from each other to be separated from each other in the circumferential direction. In the torque fluctuation absorber including a receiving member (35) and a coil-shaped damper spring (36) contracted between the spring receiving members (35), the spring receiving member (35) has a fulcrum portion ( 39) and a semicircular supported surface (41), and at the end of the driven plate side opening (32), the holder plate (5, 6) and the driven plate (7) A swing support portion (40) for swingably supporting one of the fulcrum portions (39) of the pair of spring receiving members (35) at the time of relative rotation is formed, and the holder plate side opening (30, The other spring receiving member (35) can be rotated by slidingly contacting the other supported surface (41) of the pair of spring receiving members (35) at the end of 31) during the relative rotation. Semicircular support to support (42) a torque fluctuation absorbing apparatus characterized by is formed.

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