JP2012042060A - Torque fluctuation absorbing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the generation of the eccentricity of a limiter while reducing a space and cost.SOLUTION: A torque fluctuation absorbing device includes a friction material 23, a holding material 22 which holds the friction material 23, and a plate 27 which slidably grips the friction material 23. When excessive relative torque is generated between a drive member and a driven member, a slip is generated between the friction material and the plate, and the transmission of the excessive relative torque between the drive member and the driven member is inhibited. The plate 27 has a guide 27a which guides the slide of the friction material 23, the holding member 22 holds the friction member 23 so as to be relatively rotatable and radially movable. When the eccentricity is generated between the drive member and the driven member, the friction material 23 moves in the radial direction with respect to the holding member 22.

Description

  The present invention relates to a torque fluctuation absorber.

  For example, in a hybrid drive device including an engine and an electric motor as a power source, the torque fluctuation absorber is provided on the output shaft of the engine or / and the electric motor, and absorbs the torque fluctuation caused by the engine and the electric motor ( Suppress). As a basic configuration of the torque fluctuation absorber, a flywheel connected to the crankshaft of the engine, a limiter portion including a friction material frictionally engaged with the flywheel, and a limiter portion on the outer peripheral side and an inner peripheral side And a damper portion connected to the input shaft of the transmission. The following is a conventional technique for such a torque fluctuation absorber.

  As a conventional example 1, there is provided a torque fluctuation absorbing device provided with a pinching mechanism for pinching a friction material in a frictional engagement state by pinching the friction material in the axial direction of the drive shaft before the damper portion is attached to the flywheel. Yes (see Patent Document 1). According to Conventional Example 1, the torque fluctuation absorbing device can be transported without exposing the friction material of the limiter portion, and dust, oil, and the like can be reduced as much as possible to the friction material. .

  Conventional example 2 includes a torque fluctuation absorber in which a bearing is disposed between a crankshaft and a plate in a damper portion, and a torque fluctuation in which a bush is disposed between a hub of a driven plate in the damper portion and a drive plate. There is an absorption device (see Patent Document 2). According to the second conventional example, the plates in the flywheel and the damper part are concentric by the bearing and the bush, and it is possible to prevent the limiter part from being eccentric when assembled.

JP 2003-194095 A Japanese Patent No. 3683165

  By the way, when the limiter portion is operated (when slipping occurs between the friction material and the friction counterpart material), the limiter portion and the damper portion may be decentered. Since there is no structure that regulates the core amount, the eccentricity of the limiter part and the damper part becomes large, and there is a possibility that the load load on the input shaft increases.

  In Conventional Example 2, the flywheel and damper plates are concentric with the bearings and bushes to reduce the occurrence of eccentricity in the limiter unit. However, the addition of bearings and bushes is disadvantageous in terms of space and cost reduction. There is a risk of becoming.

  The main subject of this invention is reducing generation | occurrence | production of the eccentricity of a limiter part, reducing space and cost.

In one aspect of the present invention, a friction material held from one side of the driving member and the driven member, and a holding member holding the friction material on one side of the driving member and the driven member, A plate that sandwiches the friction material slidably from the other side of the driven member and the driven member, and an excessive relative torque is generated between the driven member and the driven member. the slip between the friction material and the plate is generated when, in the torque fluctuation absorber that prevents the transmission of excessive relative torque between the driven member and the drive member, said plate, said A guide portion that guides the sliding of the friction material; and the holding member holds the friction material in a relatively non-rotatable and radially movable manner, and there is an eccentricity between the driving member and the driven member. When generated, the friction material Characterized in that to the holding member moves in the radial direction.

In the torque fluctuation absorber according to the present invention, the guide portion guides the friction material so as not to be eccentric with respect to the plate .

In the torque fluctuation absorber according to the present invention, the friction material is divided into a plurality of blocks .

In the torque fluctuation absorber according to the present invention, the holding member is a ring-shaped plate having a plurality of protrusions on an outer peripheral portion, and each block of the friction material has an inner peripheral side of the protrusion of the holding member. The protrusion and the recess engage with each other so that they cannot move in the axial direction, cannot rotate relative to each other, and can move in the radial direction .

In the torque fluctuation absorber according to the present invention, the holding member is a ring-shaped plate, and a first hole portion and a second hole portion are alternately formed on the circumference of the plate surface, and the friction material includes: A plurality of first friction materials arranged in a plurality of blocks on one side of the holding member, and a plurality of second friction materials arranged in a plurality of blocks on the opposite surface of the first surface. The first friction material has a first protrusion that engages with the first hole so as not to rotate relative to the first hole and can move in the radial direction, and the second friction material has the second hole. And a second protrusion that engages with each other so as to be relatively unrotatable and movable in the radial direction, and the first friction material and the second friction material are arranged out of phase with each other .

In the torque fluctuation absorber according to the present invention, the holding member is a ring-shaped plate having a plurality of protrusions on an outer peripheral portion, and the friction material is formed in a ring shape, and the protrusion of the holding member The part has a recessed part that can be inserted from the axial direction, and the projecting part and the recessed part engage with each other so as not to rotate relative to each other and to move in the radial direction .

The torque fluctuation absorber according to the present invention further includes another friction material that can be assembled so as to cover the concave portion in which the protrusion is inserted .

  In the torque fluctuation absorber according to the present invention, the holding member is a ring-shaped plate having a plurality of protrusions on an outer peripheral portion, and the friction material is formed in a ring shape, and the protrusion of the holding member The portion has a recess that can be inserted from the inner peripheral side, and the protrusion and the recess engage with each other so that they cannot move in the axial direction, cannot rotate relative to each other, and can move in the radial direction.

According to the present invention, since the friction material is not fixed to the holding member but is movable in the radial direction with respect to the holding member, the holding member is connected to one side of the driving member and the driven member. Even if a misalignment between the driving member and the driven member is permitted, and a misalignment between the driving member and the driven member is permitted. The limiter portion allows the misalignment and does not cause an eccentric force to act on the rotation of each driving member and driven member from the other side. As a result, the rotation of the driving member and the driven member can be stabilized, and the heat, deformation, and wear of the friction material can be suppressed .

  1 is a cutaway plan view schematically showing the configuration of a torque fluctuation absorber according to Embodiment 1 of the present invention.   It is sectional drawing between XX 'of FIG. 1 which showed typically the structure of the torque fluctuation absorber which concerns on Example 1 of this invention.   (A) Partial cross-sectional view in the direction perpendicular to the axial direction, schematically showing the relationship between the holding plate and the friction material in the torque fluctuation absorber according to Example 1 of the present invention, (B) Partial cross-section between Y-Y ' FIG.   It is the fragmentary sectional view of the (A) radial direction which showed typically the structure of the limiter part in the torque fluctuation absorber which concerns on Example 2 of this invention, (B) The partial sectional view of the circumferential direction.   (A) Partial cross-sectional view in the direction perpendicular to the axial direction, schematically showing the configuration of the assembly of the friction material and the holding member in the torque fluctuation absorber according to Example 3 of the present invention, (B) Between Y and Y ′ FIG.   (A) Partial cross-sectional view in the direction perpendicular to the axial direction and (B) Partial cross-sectional view between XX ′ schematically showing the peripheral configuration of the holding member in the torque fluctuation absorber according to Example 4 of the present invention. is there.   (A) Partial cross-sectional view in the direction perpendicular to the axial direction, schematically showing the configuration of the assembly of the friction material and the holding member in the torque fluctuation absorber according to Example 5 of the present invention, (B) Between Y and Y ′ FIG.   (A) Partial sectional view in the direction perpendicular to the axial direction, schematically showing the structure of the assembly of the friction material and the holding member in the torque fluctuation absorber according to Example 6 of the present invention, (B) Between Y and Y ′ FIG.   (A) Partial cross-sectional view in the direction perpendicular to the axial direction, schematically showing the structure of the assembly of the friction material and the holding member in the torque fluctuation absorber according to Embodiment 7 of the present invention, (B) Between Y and Y ′ FIG.   (A) The partial top view of the orthogonal | vertical direction of an axial direction which showed the structure of the assembly of the friction material and holding member in the torque fluctuation absorber which concerns on Example 8 of this invention, (B) Between Y-Y ' FIG.   (A) Partial cross-sectional view in the direction perpendicular to the axial direction, schematically showing the structure of the assembly of the friction material and the holding member in the torque fluctuation absorber according to Example 9 of the present invention, (B) Between Y and Y ′ FIG.   It is the fragmentary sectional view which showed typically the structure of the limiter part in the torque fluctuation absorber which concerns on Example 10 of this invention.   (A) The partial top view when it sees from the axial direction which showed typically the structure of the assembly of the friction material and holding member in the torque fluctuation absorber which concerns on Example 10 of this invention, (B) YY ' FIG.

In an embodiment of the present invention, a friction material (23 in FIG. 1) held from one side of a driving member (for example, an output shaft of an engine) and a driven member (for example, an input shaft of a transmission), A holding member (22 in FIG. 1) for holding the friction material on one side of the driving member and the driven member, and the friction material slidable from the other side of the driving member and the driven member plates (e.g., cover plate 27 in FIG. 1) for holding the a, a provided, between the friction material and the plate when an excessive relative torque is generated between the driven member and the drive member In the torque fluctuation absorbing device in which slippage occurs and the transmission of the excessive relative torque between the driving member and the driven member is prevented, the plate is a guide portion that guides the sliding of the friction material (FIG. 27a), and the holding part Holds the friction material in a relatively non-rotatable and radially movable manner, and when the eccentricity occurs between the driving member and the driven member, the friction material is in the radial direction with respect to the holding member. Move to.

  A torque fluctuation absorber according to Embodiment 1 of the present invention will be described with reference to the drawings. FIG. 1 is a cut-away plan view schematically showing the configuration of the torque fluctuation absorber according to Embodiment 1 of the present invention. 2 is a cross-sectional view taken along the line XX ′ of FIG. 1 schematically showing the configuration of the torque fluctuation absorber according to Embodiment 1 of the present invention. 3A and 3B schematically show the relationship between the holding plate and the friction material in the torque fluctuation absorber according to the first embodiment of the present invention. FIG. 3A is a partial cross-sectional view in the direction perpendicular to the axial direction, and FIG. FIG. In FIG. 1, the bolt 28 is omitted.

  The torque fluctuation absorber 1 according to the first embodiment is disposed between a driving member (for example, an output shaft of an engine) and a driven member (for example, an input shaft of a transmission) and has a limiter unit. When the excessive relative torque is generated between the driven member and the driven member, the limiter portion slips to prevent the transmission of the excessive relative torque between the driving member and the driven member. The torque fluctuation absorber 1 is provided, for example, in an output shaft (not shown) of an engine (not shown) in a hybrid drive apparatus, and fluctuates due to an engine (not shown) and an electric motor (not shown). The torque may be absorbed (suppressed). The torque fluctuation absorbing device 1 has a torsional buffer function, and includes a hub member 3, a side plate 4, a side plate 5, a thrust member 6, a disc spring 7, an intermediate plate 8, a disc spring 9, and a control. Plate 10, disc spring 11, thrust member 12, thrust member 13, control plate 14, thrust member 15, pin member 16, spring seat 17, spring seat 18, coil spring 19, elastic Member 20, rivet 21, holding member 22, friction material 23, flywheel 25, support plate 26, cover plate 27, bolt 28, pressure plate 29, disc spring 30, and bolt 31 Have.

  The hub member 3 is a member that is spline-engaged with, for example, an input shaft (not shown) of a transmission that is a driven member on the inner peripheral side, and is a component part of a damper portion. The hub member 3 has a flange portion 3a extending to the outer peripheral side. The flange portion 3 a has a window portion for accommodating the coil spring 19, the spring seats 17, 18, and the elastic member 20 at an intermediate portion, and a circumferential end surface of the window portion is in contact with and away from the spring seats 17, 18. It touches as possible. The flange portion 3a is slidably in contact with the thrust member 12 on the side plate 4 side surface. The flange portion 3a is slidably in contact with the thrust member 15 on the side plate 5 side surface. The flange portion 3 a has a window portion 3 b for inserting the pin member 16. The window portion 3b is formed larger than the diameter of the intermediate portion of the pin member 16, and guides the relative rotation between the flange portion 3a and the pin member 16.

  The side plate 4 is an annular member formed in a predetermined shape, and is a component part of the damper portion. The side plate 4 is arranged on the right side in the axial direction of the flange portion 3a (the right side in FIG. 2). The side plate 4 has a plurality of concave portions at the inner peripheral end portion, and the rotation preventing portion 6a of the thrust member 6 is attached to the concave portion, and is configured to be relatively unrotatable and axially movable with respect to the thrust member 6. Yes. The side plate 4 is in contact with one end of the disc spring 9 at the surface on the flange portion 3a side. The side plate 4 has a hole portion 4 a for inserting the prevention member 6 b of the thrust member 6 on the outer peripheral side of the contact portion with the disc spring 9. The side plate 4 has a window portion for accommodating the spring seats 17 and 18, the coil spring 19, and the elastic member 20 at an intermediate portion, and a circumferential end surface of the window portion is in contact with and away from the spring seats 17 and 18. It touches as possible. The side plate 4 is fixed by a rivet 21 together with the side plate 5 and the holding member 22 on the outer peripheral side of the coil spring 19.

  The side plate 5 is an annular plate member formed in a predetermined shape, and is a component part of the damper portion. The side plate 5 is arranged on the left side in the axial direction of the flange portion 3a (left side in FIG. 2). The side plate 5 is in contact with the thrust member 13 in the vicinity of the inner periphery of the inner peripheral end portion or the flange portion 3a side surface. The side plate 5 has a hole for making it non-rotatable and axially movable with respect to the thrust member 13, and a rotation stopper for the thrust member 13 is mounted in the hole. The side plate 5 has a window portion for accommodating the spring seats 17 and 18, the coil spring 19, and the elastic member 20 at an intermediate portion, and the circumferential end face of the window portion is in contact with and separated from the spring seats 17 and 18. It touches as possible. The side plate 5 is fixed by a rivet 21 together with the side plate 4 and the holding member 22 on the outer peripheral side of the coil spring 19.

  The thrust member 6 is disposed on the outer periphery of the hub member 3 between the disc spring 7 and the control plate 10 and is slidably in contact with the control plate 10. The thrust member 6 is urged toward the control plate 10 by a disc spring 7. The thrust member 6 is provided at a portion extending toward the side plate 4 on the inner periphery so that the thrust member 6 cannot be rotated relative to the side plate 4, the disc spring 7, the intermediate plate 8, and the disc spring 9 and can move in the axial direction. It has a rotation prevention part 6a. The thrust member 6 has a drop prevention portion 6b that extends through the hole portion 4a of the side plate 4. The removal preventing portion 6b is formed with a claw for preventing the removal from the side plate 4.

  The disc spring 7 is arranged on the outer periphery of the thrust member 6 and between the thrust member 6 and the intermediate plate 8. The disc spring 7 biases the thrust member 6 toward the control plate 10 side. The disc spring 7 has a concave portion corresponding to the anti-rotation portion 6a of the thrust member 6 at the inner peripheral end portion, and the anti-rotation portion 6a is attached to the concave portion, and is not relatively rotatable with respect to the thrust member 6 and moves in the axial direction. It is configured to be possible.

  The intermediate plate 8 is a ring-shaped member disposed on the outer periphery of the thrust member 6 and between the disc spring 7 and the disc spring 9. The intermediate plate 8 receives the bias of the disc spring 9 and acts to push the disc spring 7 toward the thrust member 6 side. The intermediate plate 8 has a concave portion corresponding to the anti-rotation portion 6a of the thrust member 6 at the inner peripheral end portion, and the anti-rotation portion 6a is attached to the concave portion so that the intermediate plate 8 cannot rotate relative to the thrust member 6 and moves in the axial direction. It is configured to be possible.

  The disc spring 9 is disposed on the outer periphery of the thrust member 6 and between the intermediate plate 8 and the side plate 4. The disc spring 9 biases the disc spring 7 toward the control plate 10 via the intermediate plate 8. The disc spring 9 has a concave portion corresponding to the anti-rotation portion 6a of the thrust member 6 at the inner peripheral end portion, and the anti-rotation portion 6a is attached to the concave portion, and is not rotatable relative to the thrust member 6 and moves in the axial direction. It is configured to be possible.

  The control plate 10 is a ring-shaped plate disposed on the outer periphery of the thrust member 12 and between the disc spring 11 and the thrust member 6. The control plate 10 is urged toward the thrust member 6 by the disc spring 11 and slidably contacts the thrust member 6. The control plate 10 has a recessed portion corresponding to the rotation preventing portion of the thrust member 12 at the inner peripheral end portion, and the rotation preventing portion of the thrust member 12 is mounted in the recessed portion, and is not rotatable relative to the thrust member 12 and has a shaft. It is configured to be movable in the direction. The control plate 10 is caulked and fixed to the pin member 16 in the vicinity of the outer peripheral end portion, and is configured integrally with the control plate 14 via the pin member 16.

  The disc spring 11 is disposed on the outer periphery of the thrust member 12 and between the control plate 10 and the thrust member 12. The disc spring 11 biases the control plate 10 toward the thrust member 6 side. The disc spring 11 has a concave portion corresponding to the rotation preventing portion of the thrust member 12 at the inner peripheral end portion, and the rotation preventing portion of the thrust member 12 is mounted in the concave portion, and is not rotatable relative to the thrust member 12 and has a shaft. It is configured to be movable in the direction.

  The thrust member 12 is disposed on the outer periphery of the hub member 3 and between the disc spring 11 and the flange portion 3a. The thrust member 12 is urged toward the flange portion 3a by the disc spring 11, and is in slidable contact with the flange portion 3a. The thrust member 12 has a rotation preventing portion for making it relatively non-rotatable and axially movable with respect to the disc spring 11 and the control plate 10 at a portion extending toward the thrust member 6 on the inner periphery.

  The thrust member 13 is disposed on the outer periphery of the hub member 3 and between the side plate 5 and the control plate 14, and slidably contacts the control plate 14. The thrust member 13 has an inner peripheral portion extending to the side plate 5 side. The thrust member 13 has a detent portion at a position corresponding to the hole portion formed in the side plate 5, and the detent portion is attached to the hole portion of the side plate 5, and cannot rotate relative to the side plate 5. And it is comprised so that an axial direction movement is possible.

  The control plate 14 is a ring-shaped plate disposed on the outer periphery of the hub member 3 and between the thrust member 13 and the thrust member 15. The control plate 14 is slidably in contact with the thrust member 13 and the thrust member 15. The control plate 14 is caulked and fixed to the pin member 16 in the vicinity of the outer peripheral end portion, and is configured integrally with the control plate 10 via the pin member 16.

  The thrust member 15 is disposed on the outer periphery of the hub member 3 and between the control plate 14 and the flange portion 3a. The thrust member 15 is slidably in contact with the control plate 14 and the flange portion 3a.

  The pin member 16 is a member for fixing the control plate 10 and the control plate 14 together. A control plate 14 is caulked and fixed to the pin member 16 at the end on the side plate 5 side. The control plate 10 is caulked and fixed to the pin member 16 at the end on the side plate 4 side. The pin member 16 has a large diameter at the intermediate portion, is not fixed to the flange portion 3a, and can move within the window portion 3b formed in the flange portion 3a.

  The spring seats 17 and 18 are components of the damper part, and are accommodated in a window part formed in the side plate 4, the side plate 5, and the flange part 3 a, and between the window part and the end part of the coil spring 19. It is arranged in.

  The coil spring 19 is a component part of the damper portion, is accommodated in a window portion formed in the side plate 4, the side plate 5, and the flange portion 3a, and is in contact with spring seats 17 and 18 disposed at both ends. . The coil spring 19 contracts when the side plate 4, the side plate 5, and the flange portion 3 a move relative to each other, and absorbs shock due to the rotational difference between the side plate 4, the side plate 5, and the flange portion 3 a.

  The elastic member 20 is a component part of the damper portion, and is disposed on the inner peripheral side of the coil spring 19. The elastic member 20 comes into contact with the two spring seats 17 and 18 that face each other when the coil spring 19 contracts. The shock due to the rotational difference between the side plate 5 and the flange portion 3a is absorbed.

  The rivet 21 is a member for fixing the side plate 4, the side plate 5, and the holding member 22 together.

  The holding member 22 is an annular disk member that holds the friction material 23, and is a component part of a limiter portion that rotates integrally with the damper portion. The holding member 22 is fixed by a rivet 21 between the side plate 4 and the side plate 5 together with the side plate 4 and the side plate 5. The holding member 22 has a plurality of protrusions (22 a in FIG. 3) extending between the cover plate 27 and the pressure plate 29 at the outer peripheral side portion. The protrusion 22a is inserted into the recess 23a of the friction material 23, and is configured to be relatively unrotatable and movable in the radial direction relative to the recess 23a.

  The friction material 23 is an annular member held by the holding member 22 on the outer peripheral side of the holding member 22 and is a component part of a limiter portion that rotates integrally with the damper portion. The friction material 23 is disposed between the cover plate 27 and the pressure plate 29 and slidably contacts the cover plate 27 and the pressure plate 29. The friction material 23 is slidably guided by the guide portion 27a of the cover plate 27 so as not to be eccentric. The friction material 23 has a plurality of recesses (23a in FIG. 3) corresponding to the protrusions 22a of the holding member 22 on the inner peripheral end surface. The recess 23a is inserted with the protrusion 22a of the holding member 22, and is configured to be relatively unrotatable and movable in the radial direction with respect to the protrusion 22a. Here, there is no gap between the circumferential direction of the recess 23a and the protrusion 22a. However, in order to facilitate the radial movement of the holding member 22 and the friction material 23, the recess 23a and the protrusion There may be a slight gap between the circumferential directions of the portions 22a. The friction material 23 can be made of a stretchable material such as resin or rubber as a main material, and may be a material blended with reinforcing fibers such as glass fibers.

  The flywheel 25 is, for example, an annular member that is fixed by bolts 31 to an output shaft (not shown) of an engine (not shown) or a motor (not shown) that is a drive member. The flywheel 25 has a screw hole that engages with the bolt 28 on the outer peripheral side portion. The flywheel 25 is in contact with the support plate 26.

  The support plate 26 is an annular plate member formed in a predetermined shape. The support plate 26 is disposed between the flywheel 25 and the cover plate 27 in the vicinity of the outer periphery, fixed to the cover plate 27 by rivets (not shown), and fixed to the flywheel 25 together with the cover plate 27 by bolts 28. ing. The support plate 26 has an opening 26 a at a position corresponding to the convex portion 29 a of the pressure plate 29. The opening 26 a is configured so as not to rotate relative to the pressure plate 29 and to move in the axial direction. The support plate 26 is separated from the cover plate 27. The support plate 26 is in contact with one end of the disc spring 30 on the surface on the cover plate 27 side.

  The cover plate 27 is an annular plate member formed in a predetermined shape, and is a component part of the limiter portion. The cover plate 27 is disposed on the opposite surface of the support plate 26 on the flywheel 25 side in the vicinity of the outer periphery. The cover plate 27 has a bolt hole 27b through which the bolt 28 is inserted, and a rivet hole 27c through which a rivet (not shown) is inserted, at an outer peripheral attachment portion attached to the flywheel 25. The cover plate 27 is fixed to the support plate 26 by rivets (not shown), and is fixed to the flywheel 25 together with the support plate 26 by bolts 28. The cover plate 27 is separated from the support plate 26 on the inner peripheral side. The cover plate 27 is slidably in contact with the friction material 23 and is a friction counterpart material with respect to the friction material 23. The cover plate 27 has a guide portion 27a that slidably guides the outer peripheral end surface of the friction material 23 so that the friction material 23 is not eccentric.

  The bolts 28 are members for fixing the support plate 26 and the cover plate 27 to the flywheel 25, and are inserted into holes formed in the support plate 26 and the cover plate 27 and screwed into the flywheel 25.

  The pressure plate 29 is an annular member disposed between the disc spring 30 and the friction material 23 and is a component part of the limiter portion. The pressure plate 29 is urged toward the friction material 23 by a disc spring 30. The pressure plate 29 has a convex portion 29a formed at the outer peripheral end. The convex portion 29 a is configured to be relatively unrotatable and movable in the axial direction with respect to the opening portion 26 a of the support plate 26. The pressure plate 29 is slidably in contact with the friction material 23 and is a friction counterpart material with respect to the friction material 23.

  The disc spring 30 is a member that is disposed between the support plate 26 and the pressure plate 29, biases the pressure plate 29 toward the friction material 23, and is a component part of the limiter unit.

  According to the first embodiment, since the friction material 23 is slidably guided by the guide portion 27a of the cover plate 27, the occurrence of eccentricity in the limiter portion can be reduced even when the limiter portion is activated. Further, since the friction material 23 is attached to the holding member 22 so as not to rotate and to be movable in the radial direction, eccentricity that cannot be removed can be absorbed between the friction material 23 and the holding member 22 of the limiter portion, The deformation of the friction material 23 due to heat and centrifugal force can also be absorbed. Furthermore, since new components such as bearings and bushes are not added in order to reduce the occurrence of eccentricity in the limiter portion, space and cost can be reduced.

  A torque fluctuation absorber according to Embodiment 2 of the present invention will be described with reference to the drawings. 4A and 4B are a partial cross-sectional view in the radial direction and a partial cross-sectional view in the circumferential direction schematically showing the configuration of the limiter portion in the torque fluctuation absorber according to Embodiment 2 of the present invention. FIG. 4B corresponds to a cross section taken along line YY ′ in FIG.

  The torque fluctuation absorber according to the second embodiment is configured such that the friction materials 33 and 34 can be assembled. The configuration of the assembled state of the friction materials 33 and 34 is the same as the configuration of the friction material of the first embodiment (23 in FIGS. 2 and 3). Other configurations are the same as those of the first embodiment.

  The friction material 33 is an annular member held by the holding member 22 on the outer peripheral side of the holding member 22, and is a component part of a limiter portion that rotates integrally with the damper portion. The friction material 33 is disposed between the cover plate 27 and the pressure plate 29 and slidably contacts the cover plate 27 and the pressure plate 29. The friction material 33 is slidably guided by the guide portion 27a of the cover plate 27 so as not to be eccentric. The friction material 33 has a plurality of recesses 33 a for accommodating the protrusion 22 a of the holding member 22 and the friction material 34 on the surface on the cover plate 27 side or the inner peripheral end surface. The concave portion 33a is configured such that the protrusion 22a of the holding member 22 is inserted so that the holding member 22 and the friction material 23 cannot be rotated relative to each other and can be moved in the radial direction. Composed. Here, there is no gap between the circumferential direction of the recessed portion 33a and the protruding portion 22a. However, in order to facilitate the radial movement of the holding member 22 and the friction material 33, the recessed portion 33a and the protruding portion There may be a slight gap between the circumferential directions of the portions 22a. The friction material 33 can be made of a stretchable material such as resin or rubber as a main material, and may be a material blended with reinforcing fibers such as glass fibers.

  The friction material 34 is configured to be housed in the recess 33 a of the friction material 33 so as to cover the protrusion 22 a of the holding member 22. The friction material 34 is disposed between the cover plate 27 and the protrusion 22a, and is in slidable contact with the cover plate 27. The friction material 34 can be made of a stretchable material such as resin or rubber as a main material, and may be a material blended with reinforcing fibers such as glass fibers.

  According to the second embodiment, the same effects as those of the first embodiment can be obtained, and the holding member 22 can be positioned in the axial direction.

  A torque fluctuation absorber according to Embodiment 3 of the present invention will be described with reference to the drawings. FIGS. 5A and 5B schematically show the structure of the assembly of the friction material and the holding member in the torque fluctuation absorber according to Embodiment 3 of the present invention. FIG. It is a fragmentary sectional view between -Y '.

  In the torque fluctuation absorber according to the third embodiment, the friction material 36 has a shape or material that can be expanded and contracted, and is configured to be detachable from the holding member 22. Other configurations are the same as those of the first embodiment.

  The friction material 36 is an annular member held by the holding member 22 on the outer peripheral side of the holding member 22, and is a component part of a limiter portion that rotates integrally with the damper portion. The friction material 36 is disposed between the cover plate (27 in FIG. 2) and the pressure plate (29 in FIG. 2), and is slidable with the cover plate (27 in FIG. 2) and the pressure plate (29 in FIG. 2). Touching. The friction material 36 is slidably guided so as not to be eccentric by a guide portion (27a in FIG. 2) of a cover plate (27 in FIG. 2). The friction material 36 has a recess 36 a corresponding to the protrusion 22 a of the holding member 22 on the inner peripheral end surface. The recess 36a is inserted with the protrusion 22a of the holding member 22, and is configured to be relatively unrotatable and movable in the radial direction relative to the protrusion 22a. Here, there is no gap between the circumferential direction of the recess 36a and the protrusion 22a. However, in order to facilitate the radial movement of the holding member 22 and the friction material 36, the recess 36a and the protrusion There may be a slight gap between the circumferential directions of the portions 22a. The friction material 36 is made of a shape or material that can be expanded and contracted in the circumferential direction, and has an expansion / contraction portion 36b that expands and contracts at a portion other than the recess 36a. When the friction material 36 is attached to the holding member 22, the friction material 36 extends in the circumferential direction and is attached from the outer peripheral side of the protrusion 22 a. When the friction member 36 is attached to the holding member 22, the friction member 36 is in a state in which the holding member 22 is fastened by its contraction force. The friction material 36 can be made of a stretchable material such as resin or rubber as a main material, and may be a material blended with reinforcing fibers such as glass fibers.

  According to the third embodiment, the same effect as the first embodiment is obtained.

  A torque fluctuation absorber according to Embodiment 4 of the present invention will be described with reference to the drawings. 6A is a partial cross-sectional view in the direction perpendicular to the axial direction, schematically showing the peripheral configuration of the holding member in the torque fluctuation absorber according to Embodiment 4 of the present invention, and FIG. It is a fragmentary sectional view. In FIG. 4A, the side plates 4 and 5 are omitted.

  The torque fluctuation absorber according to the fourth embodiment is configured such that the holding member 38 cannot move in the axial direction with respect to the side plates 4 and 5 and can move within a predetermined range. The configuration other than the holding member 38 and the pin member 39 is the same as that of the first embodiment.

  The holding member 38 is an annular disk member that holds the friction material 23 and is a component part of the limiter portion. The holding member 38 is sandwiched between the side plate 4 and the side plate 5. The holding member 38 has a window portion 38 b at a portion sandwiched between the side plate 4 and the side plate 5. The window portion 38 b is a through hole configured to be larger than the diameter of the intermediate portion of the pin member 39, and the pin member 39 is inserted therethrough. There is a gap between the window portion 38b and the pin member 39, and the holding member 38 is movable in a state in which the axial direction movement is impossible within the range of the gap. The holding member 38 has a plurality of protrusions 38a that extend between the cover plate (27 in FIG. 2) and the pressure plate (29 in FIG. 2) on the outer peripheral side portion. The protrusion 22a is inserted into the recess 23a of the friction material 23, and is configured to be relatively unrotatable and movable in the radial direction relative to the recess 23a.

  The pin member 39 is a member for fixing the side plate 4 and the side plate 5 together. The side plate 4 and the side plate 5 are caulked and fixed to both ends of the pin member 39. The pin member 39 is configured such that the diameter of the intermediate portion is large, is not fixed to the holding member 38, and can move within a window portion 38 b formed in the holding member 38.

  According to the fourth embodiment, the same effect as in the first embodiment is obtained, and the holding member 38 is configured to be movable in the range of the gap between the window portion 38b and the pin member 39. Can also be absorbed between the holding member 38 and the pin member 39.

  A torque fluctuation absorber according to Embodiment 5 of the present invention will be described with reference to the drawings. FIG. 7 schematically shows the structure of the assembly of the friction material and the holding member in the torque fluctuation absorber according to Embodiment 5 of the present invention. (A) Partial sectional view in the direction perpendicular to the axial direction, (B) Y It is a fragmentary sectional view between -Y '.

  The torque fluctuation absorber according to the fifth embodiment is a friction material 41 obtained by dividing a ring-shaped friction material into blocks. Other configurations are the same as those of the first embodiment.

  The friction material 41 is a block-like member held by the holding member 22 on the outer peripheral side of the holding member 22 and is a component part of a limiter portion that rotates integrally with the damper portion. A plurality of friction materials 41 are combined to form a ring shape. The friction material 41 is disposed between the cover plate (27 in FIG. 2) and the pressure plate (29 in FIG. 2), and is slidable with the cover plate (27 in FIG. 2) and the pressure plate (29 in FIG. 2). Touching. The friction material 41 is slidably guided so as not to be eccentric by a guide portion (27a in FIG. 2) of a cover plate (27 in FIG. 2). The friction material 41 has one recess 41 a corresponding to the protrusion 22 a of the holding member 22 on the inner peripheral end surface. The protrusion 22a of the holding member 22 is inserted into the recess 41a, and is configured to be relatively unrotatable and movable in the radial direction with respect to the protrusion 22a. Here, there is no gap between the circumferential direction of the recess 41a and the protrusion 22a. However, in order to facilitate the radial movement of the holding member 22 and the friction material 41, the recess 41a and the protrusion There may be a slight gap between the circumferential directions of the portions 22a. The friction material 41 can be made of a stretchable material such as resin or rubber as a main material, and may be a material blended with reinforcing fibers such as glass fibers.

  According to the fifth embodiment, the same effects as in the first embodiment can be obtained, and the friction material 41 is divided into blocks, so that the accuracy of the thickness of the friction material 41 can be improved and the yield can be improved. Can be planned.

  A torque fluctuation absorber according to Embodiment 6 of the present invention will be described with reference to the drawings. 8A and 8B schematically show a configuration of an assembly of a friction material and a holding member in a torque fluctuation absorber according to Embodiment 6 of the present invention. FIG. 8A is a partial cross-sectional view perpendicular to the axial direction, and FIG. It is a fragmentary sectional view between -Y '.

  The torque fluctuation absorber according to the sixth embodiment is configured such that a ring-shaped friction material is a friction material 43 obtained by dividing the friction material into blocks, and a protrusion 44 a of the holding member 44 penetrates the friction material 43. Other configurations are the same as those of the first embodiment.

  The friction material 43 is a block-like member held by the holding member 44 on the outer peripheral side of the holding member 44, and is a component part of a limiter portion that rotates integrally with the damper portion. The friction material 43 becomes a ring shape by combining a plurality of friction materials 43. The friction material 43 is disposed between the cover plate (27 in FIG. 2) and the pressure plate (29 in FIG. 2), and is slidable with the cover plate (27 in FIG. 2) and the pressure plate (29 in FIG. 2). Touching. The friction material 43 is slidably guided so as not to be eccentric by a guide portion (27a in FIG. 2) of a cover plate (27 in FIG. 2). The friction material 43 has one through hole 43 a corresponding to the protrusion 44 a of the holding member 44 on the inner peripheral end surface. The through hole 43a is inserted through the protrusion 44a of the holding member 44, and is configured to be relatively unrotatable and movable in the radial direction with respect to the protrusion 44a. Here, there is no gap between the circumferential direction of the through-hole portion 43a and the protruding portion 44a. However, in order to smoothly move the holding member 44 and the friction material 43 in the radial direction, the through-hole There may be a slight gap between the circumferential direction of the portion 43a and the protruding portion 44a. The friction material 43 can be made of a stretchable material such as resin or rubber as a main material, and may be a material blended with reinforcing fibers such as glass fibers.

  The holding member 44 is an annular disk member that holds the friction material 43, and is a component part of a limiter portion that rotates integrally with the damper portion. The holding member 44 is formed between the side plate (4 in FIG. 2) and the side plate (5 in FIG. 2) together with the side plate (4 in FIG. 2) and the side plate (5 in FIG. 2). 21). The holding member 44 has a plurality of protrusions 44a extending to the space between the cover plate (27 in FIG. 2) and the pressure plate (29 in FIG. 2) at the outer peripheral side portion. The protrusion 44a passes through the through hole 43a of the friction material 43, and is configured to be relatively unrotatable and movable in the radial direction with respect to the through hole 43a.

  According to the sixth embodiment, the same effect as the fifth embodiment is obtained.

  A torque fluctuation absorber according to Embodiment 7 of the present invention will be described with reference to the drawings. 9A and 9B schematically show a configuration of an assembly of a friction material and a holding member in a torque fluctuation absorber according to Embodiment 7 of the present invention. FIG. 9A is a partial cross-sectional view perpendicular to the axial direction, and FIG. It is a fragmentary sectional view between -Y '.

  The torque fluctuation absorber according to the seventh embodiment has friction members 46 and 48 obtained by dividing a ring-shaped friction material into blocks, and the friction materials 46 and 47 and the friction materials 48 and 49 can be assembled. . The configuration in which the friction materials 46 and 47 and the friction materials 48 and 49 are assembled is the same as that of the friction material of the fifth embodiment (41 in FIG. 7). Other configurations are the same as those of the first embodiment.

  The friction material 46 is a block-like member held by the holding member 50 on the outer peripheral side of the holding member 50, and is a component part of a limiter portion that rotates integrally with the damper portion. A plurality of friction materials 46 are combined to form a ring shape. The friction material 46 is disposed between the cover plate (27 in FIG. 2) and the pressure plate (29 in FIG. 2), and is slidable with the cover plate (27 in FIG. 2) and the pressure plate (29 in FIG. 2). Touching. The friction material 46 is slidably guided so as not to be eccentric by a guide portion (27a in FIG. 2) of a cover plate (27 in FIG. 2). The friction material 46 has a concave portion 46 a that accommodates the protrusion 50 a of the holding member 50 and the friction material 47 on the surface on the cover plate (27 in FIG. 2) side or the inner peripheral end surface. The recess 46a is configured such that the protrusion 50a of the holding member 50 is inserted so that the holding member 50 and the friction material 46 cannot be rotated relative to each other and can be moved in the radial direction. Composed. Here, there is no gap between the circumferential direction of the recessed portion 46a and the protruding portion 50a. However, in order to facilitate the radial movement of the holding member 50 and the friction material 46, the recessed portion 46a and the protruding portion There may be a slight gap between the circumferential directions of the portion 50a. The friction material 46 can be made of a stretchable material such as resin or rubber as a main material, and may be a material blended with reinforcing fibers such as glass fibers.

  The friction material 47 is configured to be housed in the recess 46 a of the friction material 46 so as to cover the protrusion 50 a of the holding member 50. The friction material 47 is disposed between the cover plate (27 in FIG. 2) and the protrusion 50a, and slidably contacts the cover plate (27 in FIG. 2). The friction material 47 can be made of a stretchable material such as resin or rubber as a main material, and may be a material blended with reinforcing fibers such as glass fibers.

  The friction material 48 is a block-like member held by the holding member 50 on the outer peripheral side of the holding member 50, and is a component part of a limiter portion that rotates integrally with the damper portion. A plurality of friction materials 48 are combined to form a ring shape. The friction material 48 is disposed between the cover plate (27 in FIG. 2) and the pressure plate (29 in FIG. 2), and is slidable with the cover plate (27 in FIG. 2) and the pressure plate (29 in FIG. 2). Touching. The friction material 48 is slidably guided so as not to be eccentric by a guide portion (27a in FIG. 2) of a cover plate (27 in FIG. 2). The friction material 48 has a concave portion 48 a that accommodates the protrusion 50 b of the holding member 50 and the friction material 49 on the pressure plate (29 in FIG. 2) side or inner peripheral end surface. The recess 48a is configured such that the protrusion 50b of the holding member 50 is inserted so that the holding member 50 and the friction material 48 cannot be rotated relative to each other and can be moved in the radial direction. Composed. Here, there is no gap between the circumferential direction of the recessed portion 48a and the protruding portion 50b. However, in order to facilitate the radial movement of the holding member 50 and the friction material 48, the recessed portion 48a and the protruding portion There may be a slight gap between the circumferential directions of the portion 50b. The friction material 48 can be made of a stretchable material such as resin or rubber as a main material, and may be a material blended with reinforcing fibers such as glass fibers.

  The friction material 49 is configured to be housed in the recess 48 a of the friction material 48 so as to cover the protrusion 50 b of the holding member 50. The friction material 49 is disposed between the pressure plate (29 in FIG. 2) and the protrusion 50b, and is slidably in contact with the pressure plate (29 in FIG. 2). The friction material 49 can be made of a stretchable material such as resin or rubber as a main material, and may be a material blended with reinforcing fibers such as glass fibers.

  The holding member 50 is an annular disk member that holds the friction materials 46 and 48, and is a component part of a limiter portion that rotates integrally with the damper portion. The holding member 50 is formed between the side plate (4 in FIG. 2) and the side plate (5 in FIG. 2) together with the side plate (4 in FIG. 2) and the side plate (5 in FIG. 2). 21). The holding member 50 includes a plurality of protrusions 50a and 50b extending between the cover plate (27 in FIG. 2) and the pressure plate (29 in FIG. 2) at the outer peripheral side portion. The protrusion 50a is inserted into the recess 46a of the friction material 46, and is configured to be relatively unrotatable and movable in the radial direction with respect to the recess 46a. The protrusion 50b is inserted into the recess 48a of the friction material 48, and is configured to be relatively unrotatable and movable in the radial direction with respect to the recess 48a.

  The assembly of the friction materials 46 and 47 and the assembly of the friction materials 48 and 49 are alternately arranged on the outer periphery of the holding member 50. Moreover, the structure which does not have the friction materials 47 and 49 may be sufficient.

  According to the seventh embodiment, the same effects as those of the first embodiment are obtained, and the friction surface area and the surface shape of both friction surfaces are equal.

  A torque fluctuation absorber according to Example 8 of the present invention will be described with reference to the drawings. 10A and 10B schematically show the structure of an assembly of a friction material and a holding member in a torque fluctuation absorber according to Embodiment 8 of the present invention. FIG. 10A is a partial plan view perpendicular to the axial direction. It is a fragmentary sectional view between -Y '.

  In the torque fluctuation absorber according to the eighth embodiment, the friction materials 52 and 53 are formed in a block shape, the friction material 52 and the friction material 53 are arranged on both surfaces of the holding member 54 with the phases shifted, and the holding member 54 has a hole 54a, 54b is formed, and a protrusion 52a is formed which is not rotatable relative to the hole 54a and is movable in the radial direction in the friction material 52, and is relatively unrotatable and movable in the radial direction relative to the hole 54b in the friction material 53 The protrusion 53a is formed. Other configurations are the same as those of the first embodiment.

  The friction material 52 is a block-like member held by the holding member 54 on the cover plate (27 in FIG. 2) side of the holding member 54, and is a component part of a limiter portion that rotates integrally with the damper portion. A plurality of friction materials 52 are combined to form a ring shape. The friction material 52 is disposed between the cover plate (27 in FIG. 2) and the holding member 54, and slidably contacts the cover plate (27 in FIG. 2). The friction material 52 is slidably guided so as not to be eccentric by a guide portion (27a in FIG. 2) of a cover plate (27 in FIG. 2). The friction material 52 has a protrusion 52 a at a position corresponding to the hole 54 a of the holding member 54. The protrusion 52a is inserted into the hole 54a of the holding member 54, and is configured to be relatively unrotatable and movable in the radial direction with respect to the hole 54a. Here, although there is no gap between the circumferential direction of the projection 52a and the hole 54a, the projection 52a is used in order to smoothly move the holding member 54 and the friction material 52 in the radial direction. There may be a slight gap between the circumferential direction of the hole 54a. The friction material 52 is arranged out of phase with the friction material 53. The friction material 52 can be made of a stretchable material such as resin or rubber as a main material, and may be a material blended with reinforcing fibers such as glass fibers.

  The friction material 53 is a block-like member held by the holding member 54 on the pressure plate (29 in FIG. 2) side of the holding member 54, and is a component part of a limiter portion that rotates integrally with the damper portion. A plurality of friction materials 53 are combined to form a ring shape. The friction material 53 is disposed between the pressure plate (29 in FIG. 2) and the holding member 54, and slidably contacts the pressure plate (29 in FIG. 2). The friction material 53 has a protrusion 53 a at a position corresponding to the hole 54 b of the holding member 54. The protrusion 53a is inserted into the hole 54b of the holding member 54, and is configured to be relatively unrotatable and movable in the radial direction with respect to the hole 54b. Here, although there is no gap between the circumferential direction of the projection 53a and the hole 54b, the projection 53a is used in order to smoothly move the holding member 54 and the friction material 53 in the radial direction. There may be a slight gap between the circumferential direction of the hole 54b. The friction material 53 is arranged out of phase with the friction material 52. The friction material 53 can be made of a stretchable material such as resin or rubber as a main material, and may be a material blended with reinforcing fibers such as glass fibers.

  The holding member 54 is an annular disk member that holds the friction materials 52 and 53, and is a component part of a limiter portion that rotates integrally with the damper portion. The holding member 54 is formed between the side plate (4 in FIG. 2) and the side plate (5 in FIG. 2) together with the side plate (4 in FIG. 2) and the side plate (5 in FIG. 2). 21). The holding member 54 has an outer peripheral portion extending between the cover plate (27 in FIG. 2) and the pressure plate (29 in FIG. 2). A friction material 52 is disposed on the surface of the holding member 54 on the cover plate (27 in FIG. 2) side. The holding member 54 has a hole 54 a at a position corresponding to the protrusion 52 a of the friction material 52. The hole 54a is configured to be relatively unrotatable and movable in the radial direction with respect to the protrusion 52a. A friction material 53 is disposed on the surface of the holding member 54 on the pressure plate (29 in FIG. 2) side. The holding member 54 has a hole 54 b at a position corresponding to the protrusion 53 a of the friction material 53. The hole 54b is configured to be relatively unrotatable and movable in the radial direction with respect to the protrusion 53a. The holes 54a and the holes 54b are alternately arranged.

  According to the eighth embodiment, the same effects as those of the first embodiment are obtained, and the friction surface area and the surface shape of both friction surfaces are equal.

  A torque fluctuation absorber according to Embodiment 9 of the present invention will be described with reference to the drawings. 11A and 11B schematically show a configuration of an assembly of a friction material and a holding member in a torque fluctuation absorber according to Embodiment 9 of the present invention. FIG. 11A is a partial cross-sectional view perpendicular to the axial direction, and FIG. It is a fragmentary sectional view between -Y '.

  In the torque fluctuation absorber according to the ninth embodiment, the friction material 56 has an arc shape, and concave portions 56a and 56b corresponding to the protrusions 50a and 50b of the holding member 50 are formed on the inner peripheral end portion of the friction material 56. In FIG. 56, a stretchable portion 56c that stretches in the circumferential direction is formed. Other configurations are the same as those of the first embodiment.

  The friction material 56 is an arc-shaped member having an angle of 45 degrees or more held by the holding member 50 on the outer peripheral side of the holding member 50, and is a component part of a limiter portion that rotates integrally with the damper portion. A plurality of friction materials 56 are combined to form a ring shape. The friction material 56 is disposed between the cover plate (27 in FIG. 2) and the pressure plate (29 in FIG. 2), and is slidable with the cover plate (27 in FIG. 2) and the pressure plate (29 in FIG. 2). Touching. The friction material 56 is slidably guided so as not to be eccentric by a guide portion (27a in FIG. 2) of a cover plate (27 in FIG. 2). The friction material 56 has a plurality of recesses 56a and 56b corresponding to the protrusions 50a and 50b of the holding member 50 on the inner peripheral end face. The protrusion 56a of the holding member 50 is inserted into the recess 56a, and the recess 56a is configured to be relatively unrotatable and movable in the radial direction with respect to the protrusion 50a. The protrusion 56b of the holding member 50 is inserted into the recess 56b, and the recess 56b is configured to be relatively unrotatable and movable in the radial direction with respect to the protrusion 50b. Here, there is no gap between the recesses 56a and 56b and the circumferential direction of the protrusions 50a and 50b, but in order to smoothly move the holding member 50 and the friction material 56 in the radial direction, There may be a slight gap between the recesses 56a, 56b and the circumferential direction of the protrusions 50a, 50b. The friction material 56 is made of a shape or material that is freely stretchable in the circumferential direction, and has a stretchable portion 56c that stretches at a portion other than the recesses 56a and 56b. When the friction material 56 is attached to the holding member 50, the friction material 56 extends in the circumferential direction and is attached from the outer peripheral side of the protrusions 50a and 50b. When the friction material 56 is attached to the holding member 50, the friction member 56 is in a state in which the holding member 22 is fastened by its contraction force. The friction material 56 can be made of a stretchable material such as resin or rubber as a main material, and may be a material blended with reinforcing fibers such as glass fibers.

  The holding member 50 is an annular disk member that holds the friction material 56 and is a component part of a limiter portion that rotates integrally with the damper portion. The holding member 50 is formed between the side plate (4 in FIG. 2) and the side plate (5 in FIG. 2) together with the side plate (4 in FIG. 2) and the side plate (5 in FIG. 2). 21). The holding member 50 includes a plurality of protrusions 50a and 50b extending between the cover plate (27 in FIG. 2) and the pressure plate (29 in FIG. 2) at the outer peripheral side portion. The protrusion 50a is inserted into the recess 56a of the friction material 56, and is configured to be relatively unrotatable and movable in the radial direction relative to the recess 56a. The protrusion 50b is inserted into the recess 56b of the friction material 56, and is configured to be relatively unrotatable and movable in the radial direction relative to the recess 56b.

  According to the ninth embodiment, the same effects as those of the first embodiment can be obtained, and the friction material 56 can be prevented from dropping from the holding member 50 due to the contraction force of the friction material 56.

  A torque fluctuation absorber according to Example 10 of the present invention will be described with reference to the drawings. FIG. 12 is a partial cross-sectional view schematically showing the configuration of the limiter unit in the torque fluctuation absorber according to Example 10 of the present invention. FIG. 13 schematically shows the structure of the assembly of the friction material and the holding member in the torque fluctuation absorber according to Embodiment 10 of the present invention. (A) Partial plan view when viewed from the axial direction, (B) It is a fragmentary sectional view between YY '.

  The torque fluctuation absorber according to the tenth embodiment is a multi-plate type in which the friction plates 63 and the friction material 59 are alternately arranged, and the friction material 59 is attached to the holding member 58 so as not to be relatively rotatable and movable in the radial direction. The friction material 59 is slidably guided by the guide portion 63a of the friction plate 63. The limiter portion of the torque fluctuation absorber includes a holding member 58, a friction material 59, a cover plate 60, a ring member 61, a support plate 62, a friction plate 63, and a disc spring 64. The configuration of other parts is the same as that of the first embodiment.

  The holding member 58 is an annular disk member that holds the friction material 59 and is a component part of a limiter portion that rotates integrally with the damper portion. The holding member 58 is fixed with a rivet (21 in FIG. 2) together with the side plate 4 and the side plate 5 between the side plate 4 and the side plate 5. The holding member 58 has a plurality of protrusions 58a on the outer peripheral side portion. The protrusion 58a is engaged with the recess 59a of the friction material 59 so as not to be relatively rotatable and to be movable in the radial direction.

  The friction material 59 is an annular member held by the holding member 58 on the outer peripheral side of the holding member 58, and is a component part of a limiter portion that rotates integrally with the damper portion. The friction material 59 is alternately arranged with the friction plate 63 between the cover plate 60 and the disc spring 64, and is in slidable contact with the friction plate 63. The friction material 59 on the right side of FIG. And slidably touching. The friction material 59 is slidably guided by the guide portion 63a of the friction plate 63 so as not to be eccentric. The friction material 59 has an inner spline-shaped recess 59a corresponding to the protrusion 22a of the holding member 22 on the inner peripheral end surface. The recess 59a is engaged with the protrusion 58a of the holding member 58 so as not to be relatively rotatable, movable in the radial direction, and movable in the axial direction. Here, there is no gap between the recess 59a and the protrusion 58a in the circumferential direction, but the recess 59a and the protrusion 59 are smoothed in order to smoothly move the holding member 58 and the friction material 59 in the radial direction. There may be a slight gap between the circumferential directions of the portions 58a. The friction material 59 can be made of a stretchable material such as resin or rubber as a main material, and may be a material blended with reinforcing fibers such as glass fibers.

  The cover plate 60 is an annular plate member and is a component part of the limiter unit. The cover plate 60 is attached to the rotating member (25 in FIG. 2) by a bolt (28 in FIG. 2) together with the ring member 61 and the support plate 62 in the vicinity of the outer periphery. The cover plate 60 is slidably in contact with the friction material 59 and is a friction counterpart material with respect to the friction material 59.

  The ring member 61 is a ring-shaped member and is a component part of the limiter part. The ring member 61 is disposed between the cover plate 60 and the support plate 62 and on the outer periphery of the friction plate 63, and is rotated by a bolt (28 in FIG. 2) together with the cover plate 60 and the support plate 62 in the vicinity of the outer periphery. It is attached to the member (25 in FIG. 2). The ring member 61 has an inner spline-shaped convex portion 61a on the inner peripheral portion. The convex portion 61a is engaged with the concave portion 63b of the friction plate 63 so as not to be relatively rotatable and axially movable.

  The support plate 62 is an annular plate member. The support plate 62 is arranged between the rotating member (25 in FIG. 2) and the ring member 61 in the vicinity of the outer periphery, and together with the cover plate 60 and the ring member 61 by bolts (28 in FIG. 2), the rotating member (in FIG. 2). 25). The support plate 62 is in contact with one end of the disc spring 64 on the surface on the cover plate 60 side.

  The friction plate 63 is an annular plate member formed in a predetermined shape, and is a component part of the limiter unit. The friction plate 63 is alternately arranged with the friction material 59 between the cover plate 60 and the disc spring 64, and slidably contacts the friction material 59. The left friction plate 63 in FIG. 12 is urged toward the cover plate 60 by a disc spring 64. The friction plate 63 has a guide portion 63a that slidably guides the outer peripheral end surface of the friction material 59 so that the friction material 59 is not eccentric. The guide part 63a can be formed by press working. The friction plate 63 has an outer spline-shaped recess 63b on the outer peripheral portion. The concave portion 63b is engaged with the convex portion 61a of the ring member 61 so as not to be relatively rotatable and axially movable.

  The disc spring 64 is a member that is disposed between the support plate 62 and the friction plate 63 and urges a portion where the friction plate 63 and the friction material 59 are laminated to the cover plate 60 side, and is a component part of the limiter unit.

According to the tenth embodiment, the same effects as the first embodiment are obtained .

DESCRIPTION OF SYMBOLS 1 Torque fluctuation absorber 3 Hub member 3a Flange part 3b Window part 4 Side plate 4a Hole part 5 Side plate 6 Thrust member 6a Anti-rotation part 6b Fall prevention part 7 Disc spring 8 Intermediate plate 9 Disc spring 10 Control plate 11 Disc spring 12 Thrust member 13 Thrust member 14 Control plate 15 Thrust member 16 Pin member 17 Spring seat 18 Spring seat 19 Coil spring 20 Elastic member 21 Rivet 22 Holding member 22a Protrusion portion 23 Friction material 23a Recess 25 Flywheel 26 Support plate 26a Opening portion 27 Cover Plate (Plate)
27a guide part 27b bolt hole 27c rivet hole 28 bolt 29 pressure plate 29a convex part 30 disc spring 31 bolt 33, 34, 36, 41 friction material 33a, 36a, 41a concave part 36b telescopic part 38 holding member 38a projection part 38b window part 39 Pin member 43, 46, 47, 48, 49 Friction material 43a Through hole 46a, 48a Recess 44, 50 Holding member 44a, 50a, 50b Protrusion 52, 53 Friction material 52a, 53a Protrusion 54 Holding member 54a, 54b Hole Portion 56 Friction material 56a, 56b Recessed portion 56c Stretchable portion 58 Holding member 58a Protruding portion 59 Friction material 59a Recessed portion 60 Cover plate 61 Ring member 61a Protruding portion 62 Support plate 63 Friction plate 63a Guide portion 63b Recessed portion 64 Disc spring

Claims (8)

A friction material held from one side of the driving member and the driven member;
A holding member for holding the friction material on one side of the driving member and the driven member;
A plate for sandwiching the friction material slidably from the other side of the driving member and the driven member;
With
When an excessive relative torque is generated between the driving member and the driven member , slip occurs between the friction material and the plate, and the excessive amount between the driving member and the driven member is generated. In a torque fluctuation absorber that prevents transmission of relative torque,
The plate has a guide portion for guiding sliding of the friction material,
The holding member holds the friction material in a relatively non-rotatable and radially movable manner,
The torque fluctuation absorbing device according to claim 1, wherein when the eccentricity occurs between the driving member and the driven member, the friction material moves in a radial direction with respect to the holding member .   The torque fluctuation absorber according to claim 1, wherein the guide portion guides the friction material so as not to be eccentric with respect to the plate.   3. The torque fluctuation absorber according to claim 1, wherein the friction material is divided into a plurality of blocks.   The holding member is a ring-shaped plate having a plurality of protrusions on the outer periphery,
  Each block of the friction material has a concave portion into which the protruding portion of the holding member can be inserted from the inner peripheral side,
  4. The torque fluctuation absorber according to claim 3, wherein the protrusion and the recess engage with each other so that the axial movement is impossible, the relative rotation is impossible, and the radial movement is possible.   The holding member is a ring-shaped plate, and the first hole and the second hole are alternately formed on the circumference of the plate surface,
  The friction material is divided into a plurality of blocks arranged on a single surface of the holding member and divided into a plurality of blocks on the opposite surface of the first surface. The second friction material,
  The first friction material has a first protrusion that engages with the first hole so as to be relatively unrotatable and movable in a radial direction,
  The second friction material has a second protrusion that engages with the second hole so as not to rotate relative to the second hole and to move in the radial direction.
  4. The torque fluctuation absorber according to claim 3, wherein the first friction material and the second friction material are arranged out of phase with each other.   The holding member is a ring-shaped plate having a plurality of protrusions on the outer periphery,
  The friction material is formed in a ring shape, and has a recess into which the protrusion of the holding member can be inserted from the axial direction,
  The torque fluctuation absorber according to claim 1 or 2, wherein the projection and the recess engage with each other so as not to be relatively rotatable and movable in the radial direction.   The torque fluctuation absorber according to claim 6, further comprising another friction material that can be assembled so as to cover the concave portion in which the protrusion is inserted.   The holding member is a ring-shaped plate having a plurality of protrusions on the outer periphery,
  The friction material is formed in a ring shape and has a recess into which the protrusion of the holding member can be inserted from the inner peripheral side,
  The torque fluctuation absorber according to claim 1 or 2, wherein the protrusion and the recess are engaged so as not to be axially movable, relatively rotatable, and radially movable.

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