JP2006336779A - Clutch disc, clutch disc assembly and clutch device using the same as well as clutch disc manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an adhered and fixed type clutch disc having improved adhesive strength between a friction facing and a cushioning plate. <P>SOLUTION: The clutch disc 32 comprises the pair of annular friction facings 33 opposed to each other in the axial direction for frictional engagement with a flywheel 2, the plurality of cushioning plates 35 provided between the pair of friction facings 33 in a elastically deformable manner and having a pair of flat portions 36 opposed to the pair of friction facings 33, and at least one adhesive layer 38 for fixing the friction facings 33 to the flat portions 36 with adhesive. The friction facings 33 each have at least one recessed portion 33a on the opposite side to the flat portion 36. At least part of the flat portion 36 is fitted to the recessed portion 33a. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a clutch disk, and more particularly, to a clutch disk to which a friction facing is bonded and fixed, a clutch disk assembly and a clutch device using the same, and a method of manufacturing the clutch disk.

  The clutch disk assembly is for transmitting torque by friction engagement between the input side rotating body and the output side rotating body. Generally, the clutch disk having a pair of friction facings and the clutch disk are fixed. An input side plate, an output side hub, and a damper portion that elastically connects the input side plate and the output side hub in the circumferential direction.

  When torque is transmitted by the clutch disc assembly, for example, the friction facing is pressed against the engine-side flywheel by the pressure plate of the clutch cover assembly. As a result, the clutch disk is sandwiched between the flywheel and the pressure plate, and the torque input to the flywheel is input to the input side plate via the clutch disk. This torque is transmitted to the output hub via the damper portion and output to the output transmission. Thus, the clutch disc assembly is capable of transmitting torque by the pressure contact of the clutch disc to the flywheel (see, for example, Patent Document 1).

  As the clutch disk described above, one having a plurality of cushioning plates is known in order to mitigate the impact when the clutch is engaged. The cushioning plate is formed by bending a plate-like member into a corrugated shape, and is fixed to a pair of friction facings. The corrugated portion is elastically deformable in the axial direction when the clutch disc is sandwiched between the flywheel and the pressure plate. The elastic deformation of the cushioning plate acts as a cushion, and the impact when the clutch is engaged is alleviated.

  Generally, in this clutch disk, the friction facing and the cushioning plate are connected by a plurality of metal rivets. Accordingly, considering the engagement portion between the friction facing and the rivet, the thickness of the rivet head, the wear amount of the friction facing, etc., the friction facing becomes thicker than necessary, and the weight of the clutch disk increases. Since the rivet is made of metal, the weight of the rivet itself greatly affects the weight of the entire clutch disk. From the above, the rivet-fixed clutch disk tends to be heavy.

On the other hand, considering the smooth speed change operation by the transmission, the weight of the clutch disk is preferably small. Therefore, in order to reduce the weight of the clutch disk, an adhesive fixed type clutch disk in which the friction facing and the cushioning plate are fixed with an adhesive has been proposed.
JP 2001-241463 A

  Since the adhesive-fixed clutch disc uses an adhesive, the fixing strength is inferior to that of the rivet-fixed clutch disc. For example, when the clutch is engaged, a rotational load acts between the friction facing and the cushioning plate. As a result, a shearing force acts on the friction facing, the cushioning plate, and the bonding surface, and the bonded portion may be damaged.

  Further, the adhesive fixing type clutch disc requires more time for positioning the friction facing and the cushioning plate than the rivet fixing type clutch disc. As a result, production efficiency may be reduced.

  An object of the present invention is to improve the adhesive strength between a friction facing and a cushioning plate in an adhesively fixed clutch disk.

  Another object of the present invention is to improve the production efficiency of the adhesively fixed clutch disk.

  The clutch disk according to claim 1 is a clutch disk of a clutch disk assembly for transmitting torque from the input rotating body to the output rotating body by frictional engagement, and is disposed so as to face each other in the axial direction. A pair of annular friction facings for frictional engagement with the body, and a pair of flat portions disposed between the pair of friction facings so as to be elastically deformable and opposed to the pair of friction facings A plurality of cushioning plates and at least one adhesive fixing part for fixing the friction facing and the flat part with an adhesive are provided. The friction facing has at least one recess on the side facing the flat portion. At least a part of the flat portion is fitted in the recess.

  In this clutch disc, since at least a part of the flat portion is fitted in the concave portion of the friction facing, when the shearing force acts between the friction facing and the flat portion when the clutch is engaged, the fitting portion rotates in the rotational direction. Abut. Further, when the clutch disk is rotated, a shearing force due to centrifugal force acts between the friction facing and the flat portion. In this case, the fitting portion also abuts in the radial direction. As a result, the shearing force acting on the bonding surface can be reduced. Thereby, the shear strength of the adhesion part of a friction facing and a cushioning plate can be improved, and the adhesive strength of both members can be improved.

  Here, the term “fitting” means that at least a part of the flat portion enters the recessed portion in the axial direction, and includes a case where the entering portion and the recessed portion are not in contact with each other.

  According to a second aspect of the present invention, in the clutch disc according to the first aspect, the flat portion has at least one protrusion that fits into the concave portion.

  In this clutch disc, since the flat portion has at least one protrusion that fits into the recess, the protrusion and the recess can come into contact with each other in the rotational direction and the radial direction. As a result, the shearing force in the rotational direction and the radial direction acting on the bonding surface can be reduced. Thereby, the shear strength of the adhesion part of a friction facing and a cushioning plate can be improved, and the adhesive strength of both members can be improved.

  According to a third aspect of the present invention, in the clutch disc according to the second aspect, the protrusion and the concave portion are fixed by the adhesive fixing portion.

  In this clutch disc, since the protrusion and the recess are bonded and fixed, the bonding area becomes larger than when there is no protrusion and recess. Thereby, the adhesive strength between the friction facing and the cushioning plate can be improved.

  According to a fourth aspect of the present invention, in the clutch disc according to the second or third aspect, the protrusion has a first facing surface perpendicular to the rotation plane. The recess has a second facing surface that faces the first facing surface and is perpendicular to the rotation plane.

  In this clutch disc, the protrusion and the recess have first and second opposing surfaces perpendicular to the rotation plane, respectively, so that when the shear force in the rotational direction and the radial direction is received by the protrusion and the recess, the axial direction Power does not work. Thereby, the adhesive strength of a friction facing and a cushioning plate can be improved more reliably.

  The clutch disk according to claim 5 is the clutch disk according to claim 1, wherein the entire flat portion is fitted in the recess. The entire flat portion and the recess are fixed by an adhesive fixing portion.

  In this clutch disc, since the entire flat portion is fitted in the recess, for example, the rotation direction end and the radial end of the flat portion and the recess can come into contact with each other in the rotation direction and the radial direction. As a result, the shearing force in the rotational direction and the radial direction acting on the bonding surface can be reduced. Thereby, the shear strength of the adhesion part of a friction facing and a cushioning plate can be improved, and the adhesive strength of both members can be improved.

  A clutch disk according to a sixth aspect of the present invention is the clutch disk according to the fifth aspect of the present invention, having a first facing surface facing the rotation direction at the rotation direction end. The recess has a second facing surface that faces the first facing surface and faces the rotation direction.

  In this clutch disc, the flat portion and the concave portion have the first and second opposing surfaces facing the rotation direction, respectively, so that when the shear force in the rotational direction is received by the flat portion and the concave portion, an axial force is generated. It is hard to act. Thereby, the adhesive strength of a friction facing and a cushioning plate can be improved more reliably.

  According to a seventh aspect of the present invention, in the clutch disc according to the sixth aspect, the angle between the flat portion and the first facing surface is in the range of 45 to 90 degrees.

  In this clutch disc, since the angle between the flat portion and the first facing surface is within a range of 45 to 90 degrees, the axial force acts more when receiving the shearing force in the rotational direction by the flat portion and the concave portion. It becomes difficult to do.

  According to an eighth aspect of the present invention, in the sixth aspect, the angle between the flat portion and the first facing surface is in the range of 60 to 90 degrees.

  In this clutch disc, since the angle between the flat portion and the first facing surface is in the range of 60 to 90 degrees, the axial force acts more when receiving the shearing force in the rotational direction by the flat portion and the concave portion. It becomes difficult to do.

  According to a ninth aspect of the present invention, in any one of the fifth to eighth aspects, the clutch disk has a third opposing surface facing the radial direction at the radial end. The recess has a fourth facing surface that faces the third facing surface and faces the rotation direction.

  In this clutch disc, since the flat portion and the concave portion have the third and fourth opposing surfaces respectively facing in the radial direction, an axial force is applied when receiving the radial shearing force by the flat portion and the concave portion. It is hard to act. Thereby, the adhesive strength of a friction facing and a cushioning plate can be improved more reliably.

  According to a tenth aspect of the present invention, in the clutch disk according to the ninth aspect, the third facing surface faces inward in the radial direction.

  The clutch disk according to an eleventh aspect is the clutch disk according to the ninth or tenth aspect, wherein an angle between the flat portion and the third facing surface is in a range of 45 to 90 degrees.

  In this clutch disc, since the angle between the flat portion and the third facing surface is within a range of 45 to 90 degrees, the axial force acts more when receiving the radial shear force by the flat portion and the concave portion. It becomes difficult to do.

  A clutch disk according to a twelfth aspect is the clutch disk according to the ninth or tenth aspect, wherein an angle between the flat portion and the third facing surface is in a range of 60 to 90 degrees.

  In this clutch disc, since the angle between the flat portion and the third facing surface is in the range of 60 to 90 degrees, the axial force acts more when receiving the radial shear force by the flat portion and the concave portion. It becomes difficult to do.

  A clutch disk according to a thirteenth aspect of the present invention is the clutch disk according to the fifth aspect of the present invention, wherein the flat portion has a fifth opposing surface that faces the rotational direction and the radial direction at the radial end portion. The recess has a sixth facing surface that faces the fifth facing surface.

  In this clutch disc, since the flat portion and the concave portion have the third and fourth opposing surfaces facing the rotation direction and the radial direction, respectively, when receiving the shearing force in the rotation direction and the radial direction by the flat portion and the concave portion, Axial force is difficult to act on Thereby, the adhesive strength of a friction facing and a cushioning plate can be improved more reliably.

  According to a fourteenth aspect of the present invention, in the clutch disc according to the thirteenth aspect, the fifth facing surface is directed radially inward and opposite to the rotational direction of the input rotating body.

  In this clutch disk, the fifth facing surface faces the direction opposite to the rotation direction of the input rotator and the inside in the radial direction, so that the shearing force in the rotation direction and the radial direction can be more reliably received by the flat portion and the concave portion. .

  A clutch disk assembly according to claim 15 is a clutch disk assembly for transmitting torque from an input rotating body to an output rotating body by frictional engagement, and the clutch according to any one of claims 1 to 14 And a damper mechanism disposed between the clutch disk and the output rotator for elastically connecting the clutch disk and the output rotator in the rotational direction.

  A clutch device according to a sixteenth aspect is a clutch device for transmitting and interrupting torque from an input rotator to an output rotator, and is coupled to the clutch disk assembly according to the fifteenth aspect and the input rotator. A clutch cover, a pressing member which is provided on the clutch cover so as not to rotate relative to the input rotating body and presses the friction facing against the input rotating body, and is provided so as to be elastically deformable in the axial direction with respect to the clutch cover. A clutch cover assembly having a biasing member for biasing toward the body side.

  The manufacturing method of a clutch disk according to claim 17 includes: a pair of annular friction facings disposed in opposition to each other in the axial direction for frictional engagement with the input rotating body; and a pair of friction facings in the axial direction. A method of manufacturing a clutch disk of a clutch disk assembly having a plurality of cushioning plates for elastic coupling, wherein the cushioning plate has a pair of flat portions disposed to face a pair of friction facings. A cushioning plate forming step for forming a pair, a friction facing forming step for forming a pair of friction facings having a recess that fits at least a part of the flat portion, and an adhesive on at least one of the friction facing and the flat portion Apply and fit at least a part of the flat part and the concave part to at least one friction facing It includes a bonding step of fixing with an adhesive and a flat portion.

  In this manufacturing method, since at least a part of the flat portion and the concave portion are fitted in the bonding step, the positioning of the friction facing and the cushioning plate can be easily performed. As a result, it is possible to reduce the labor of the positioning operation during the bonding operation and to increase the positioning accuracy between the friction facing and the cushioning plate. As a result, the production efficiency of the clutch disk can be improved.

  Here, the term “fitting” means that at least a part of the flat portion enters the recessed portion in the axial direction, and includes a case where the entering portion and the recessed portion are not in contact with each other.

  Further, in the conventional clutch disk manufacturing process, the baking process after forming the friction facing and the drying process of the adhesive are separated. Because the friction facing is fired for a long time, if the friction facing firing and the adhesive drying are performed at the same time, the friction facing shrinks and the adhesive peels off during cooling after firing. It is.

  However, in this manufacturing method, since at least a part of the flat portion and the concave portion are fitted in the bonding step, shrinkage during cooling of the friction facing of the bonded portion can be suppressed. As a result, it is possible to prevent peeling of the adhesive due to shrinkage during cooling of the friction facing. Thereby, the baking process of a friction facing and the drying process of an adhesive agent can be made into the same process, and the manufacturing process of a clutch disk can be shortened.

  A method for manufacturing a clutch disk according to an eighteenth aspect of the present invention further includes the step of forming a cushioning plate forming step into a flat portion in the seventeenth aspect, wherein the cushioning plate forming step fits into the concave portion.

  In this clutch disk, since the protrusion is processed into a flat portion, the friction facing and the cushioning plate can be easily positioned by fitting the protrusion and the recess in the bonding step. Thereby, the labor of the positioning operation at the time of the bonding operation can be reduced, and the positioning accuracy between the friction facing and the cushioning plate can be increased.

  According to a nineteenth aspect of the present invention, in the clutch disk manufacturing method according to the seventeenth aspect, in the friction facing forming step, the concave portion is formed so that the entire flat portion can be fitted.

  In this clutch disc, since the entire flat portion can be fitted into the recess, the friction facing and the cushioning plate can be easily positioned by fitting the projection and the recess in the bonding step. Thereby, the labor of the positioning operation at the time of the bonding operation can be reduced, and the positioning accuracy between the friction facing and the cushioning plate can be increased.

  In the clutch disk according to the present invention, the adhesive strength between the friction facing and the cushioning plate in the adhesively fixed clutch disk can be improved by adopting the above configuration.

  In the clutch disk manufacturing method according to the present invention, the positioning of the friction facing and the cushioning plate is facilitated in the bonding step, and the production efficiency can be improved.

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

A. Clutch disc, clutch disc assembly and clutch device First Embodiment (1) Configuration of Clutch Device FIG. 1 is a schematic longitudinal sectional view of a clutch device 1 in which a clutch disk 32 as a first embodiment of the present invention is adopted, and FIG. 2 is a schematic plan view thereof. OO indicates the rotation center line of the clutch device 1 and the clutch disk assembly 3.

  The clutch device 1 is for transmitting and interrupting torque from an engine (not shown) to a transmission (not shown). As shown in FIGS. 1 and 2, a clutch disk assembly 3 and a clutch cover assembly are provided. It is composed of a solid 4.

  The clutch disk assembly 3 is for transmitting torque by frictional engagement, and includes a spline hub 30, a damper mechanism 31, and a clutch disk 32. The spline hub 30 is disposed on the outer peripheral side of the input shaft 5 of the transmission, and includes a hub 30a and a flange portion 30b. The hub 30 a is a cylindrical member extending in the axial direction, and is spline-engaged with the input shaft 5. The flange portion 30b is a disk-shaped portion that extends radially outward from the outer peripheral portion of the hub 30a.

  The damper mechanism 31 is for elastically connecting the clutch disk 32 and the spline hub 30 in the rotational direction, and is composed of a clutch plate 31a, a retaining plate 31b, and a plurality of coil springs 31c. . The clutch plate 31a and the retaining plate 31b are disk-shaped members disposed so as to sandwich the flange portion 30b in the axial direction, and are connected by a plurality of rivets 31d. The flange portion 30b, the clutch plate 31a, and the retaining plate 31b are formed with a plurality of accommodating portions 30c, 31e, and 31f that are cut out in a window shape, and the respective accommodating portions 30c, 31e, and 31f are coil springs 31c. Are accommodated so as to be elastically deformable in the rotational direction.

  The clutch disk 32 is for transmitting torque by friction engagement, and is connected to the outer periphery of the clutch plate 31a. Details of the clutch disk 32 will be described later.

  The clutch cover assembly 4 is for operating torque transmission by frictional engagement, and mainly includes a clutch cover 41, a pressure plate 42, and a diaphragm spring 43. The clutch cover 41 is an annular member fixed to the flywheel 2 and accommodates the pressure plate 42, the diaphragm spring 43, and the clutch disc assembly 3 therein. The pressure plate 42 is an annular member for holding the clutch disk 32 between the flywheel 2 and is provided so as not to rotate relative to the clutch cover 41 and to be relatively movable in the axial direction.

  The diaphragm spring 43 urges the pressure plate 42 toward the flywheel 2 and is provided so as not to rotate relative to the clutch cover 41 and to be elastically deformable in the axial direction. The diaphragm spring 43 has an annular portion 43b and a plurality of lever portions 43a. The annular portion 43 b is for urging the pressure plate 42 in the axial direction, and the outer peripheral portion is supported by the clutch cover 41. The inner peripheral portion of the annular portion 43 b is in contact with the pressure plate 42. The lever portion 43a is for elastically deforming the annular portion 43b in the axial direction, and is a portion extending radially inward from the annular portion 43b. The distal end of the lever portion 43a is supported by the release device 6 so as to be movable in the axial direction.

(2) Detailed Configuration of Clutch Disc 32 FIG. 3 is a plan layout view of the clutch disc 32 as the first embodiment of the present invention, and FIG. 4 is a cross-sectional view taken along line AA of FIG. The clutch disk 32 according to the first embodiment includes a pair of friction facings 33 and a plurality of cushioning plates 35. The friction facing 33 and the cushioning plate 35 are fixed not by rivets but by an adhesive. The hatched portion in FIG. 3 indicates the adhesion range.

  The friction facing 33 is a portion that frictionally engages with the flywheel 2 and the pressure plate 42 and is an annular plate formed of a friction material. As shown in FIG. 4, the friction facings 33 are disposed so as to face each other in the axial direction, and a cushioning plate 35 is disposed between the friction facings 33.

  The cushioning plate 35 is for connecting the friction facing 33 elastically in the axial direction and non-rotatably relative to the damper mechanism 31, and is arranged adjacent to the circumferential direction at equal intervals as shown in FIG. Has been.

  The cushioning plate 35 is composed of a single plate bent into a corrugated shape, and includes a pair of flat portions 36, a first elastic portion 37a, a second elastic portion 37b, and a fixing portion 39. is doing. The flat portion 36 is a portion that is bonded to the friction facing 33 and is a flat plate portion that is disposed in the vicinity of the friction facing 33. The flat portion 36 and the friction facing 33 are fixed by an adhesive, and an adhesive layer 38 (adhesive fixing portion) in which the adhesive is cured is formed between the flat portion 36 and the friction facing 33 as shown in FIG. Has been. Actually, the thickness of the adhesive layer 38 is smaller than the thickness of the cushioning plate 35, but for convenience, the adhesive layer 38 is drawn thicker than the actual thickness in FIG.

  The pair of flat portions 36 are disposed at different circumferential and axial positions, and are connected by a first elastic portion 37a so as to be elastically deformable. A second elastic portion 37b is disposed on the opposite side of the flat portion 36 from the first elastic portion 37a. The first elastic part 37 a and the second elastic part 37 b are bent in the axial direction so as to be inclined with respect to the flat part 36. That is, the cushioning plate 35 has a wave shape that is bent in the circumferential direction and the axial direction from one second elastic portion 37b to the other second elastic portion 37b.

  The fixing portion 39 is for connecting the flat portion 36 and the first elastic portion 37a to the clutch plate 31a of the damper mechanism 31, and extends inward in the radial direction from the flat portion 36 as shown in FIG. The fixed portion 39 is connected to the clutch plate 31a by, for example, a plurality of rivets 31d (FIG. 1).

  In the clutch disk 32 described above, a part of the flat portion 36 is fitted to the friction facing as shown in FIG. Specifically, the flat portion 36 has a plurality of protrusions 36 a on the side facing the friction facing 33. In the present embodiment, as shown in FIGS. 3 and 4, for example, four protrusions 36 a are formed on one flat portion 36, and the protrusion 36 a has a conical shape.

  The friction facing 33 has a plurality of concave portions 33 a on the side facing the flat portion 36. The concave portion 33a is a portion into which the protruding portion 36a is fitted, and is disposed at a position corresponding to the protruding portion 36a. Moreover, the recessed part 33a has a shape complementary to the projection part 36a. As shown in FIG. 4, the protrusion 36a is bonded and fixed in a state of being fitted in the recess 33a. That is, the adhesive layer 38 is also formed between the protrusion 36a and the recess 33a.

  As described above, in the clutch disk 32, the protrusion 36 a that is a part of the flat portion 36 is fitted in the recess 33 a of the friction facing 33. For this reason, when a shearing force in the rotational direction and the radial direction acts between the friction facing 33 and the flat portion 36 when the clutch is engaged, the protrusion 36a and the concave portion 33a are interposed in the rotational direction and the radial direction via the adhesive layer 38. opposite. As a result, the rotational force and the radial shearing force acting when the clutch is engaged can be received by the protrusion 36a and the recess 33a, and the shearing force acting on the adhesive surface of the adhesive layer 38 can be reduced. Thereby, the shear strength of the adhesion part of the friction facing 33 and the cushioning plate 35 can be improved, and the adhesive strength of both members can be improved.

  Further, in this clutch disk 32, since the protruding portion 36a and the recessed portion 33a are also bonded and fixed, the bonding area becomes larger than when the protruding portion 36a and the recessed portion 33a are not provided. Thereby, the adhesive strength between the friction facing 33 and the cushioning plate 35 can be improved.

  Further, as will be described later, in the clutch disk 32, the baking process of the friction facing 33 and the drying process of the adhesive are simultaneously performed in the manufacturing process. Specifically, the friction facing 33 and the cushioning plate 35 are heated in a bonded state. After the heating, the friction facing 33 is naturally cooled, but at this time, each member contracts. When the friction facing 33 contracts, the concave portion 33a tightens the protruding portion 36a fitted in the concave portion 33a through the adhesive layer 38. As a result, the adhesive strength between the friction facing 33 and the cushioning plate 35 can be improved more reliably.

  The protrusion 36a is integrally formed with the flat portion 36, and does not have a portion that penetrates in the axial direction or a portion that is notched. Therefore, the strength around the protrusion 36a is not reduced. Thereby, even when a load is applied to the protrusion 36a, the protrusion 36a can be prevented from being deformed or damaged.

(3) Operation The operation of the clutch device 1 and the clutch disk assembly 3 will be described.

  As shown in FIG. 1, when releasing the clutch, the release device 6 pulls the distal ends of the plurality of lever portions 43a of the diaphragm spring 43 toward the axial transmission side (right side in FIG. 1), and the diaphragm spring 43 moves in the axial direction. Elastically deforms. As a result, the urging force to the pressure plate 42 is released, the clutch disk 32 of the clutch disk assembly 3 is not held between the flywheel 2 and the pressure plate 42, and the coupling of the clutch device 1 is released.

  When the clutch is engaged, the distal end of the lever portion 43a is returned to the axial engine side by the release device 6, and the pressure plate 42 is urged toward the axial engine side by the elastic force of the diaphragm spring 43. As a result, the clutch disk 32 is held between the flywheel 2 and the pressure plate 42, and the cushioning plate 35 is elastically deformed in the axial direction between the friction facings 33. Specifically, as shown in FIG. 5A, first, the first elastic portion 37a is elastically deformed in the axial direction. Then, as shown in FIG. 5B, the flat portion 36, the first elastic portion 37 a and the adhesive layer 38 are compressed between the friction facings 33. At this time, a frictional force is generated on the friction surface between the friction facing 33, the flywheel 2 and the pressure plate 42, and the rotational surface and the radial direction are applied to the adhesive surface of the adhesive layer 38 which is a joint between the friction facing 33 and the cushioning plate 35. The shearing force acts.

  However, in this clutch disc 32, the protrusion 36a, which is a part of the flat portion 36, is fitted in the concave portion 33a of the friction facing 33, so that the rotational direction and the clearance between the friction facing 33 and the flat portion 36 when the clutch is engaged. When a shearing force in the radial direction is applied, the shearing force can be received by the protrusion 36a and the recess 33a. As a result, the shearing force acting on the bonding surface of the bonding layer 38 can be reduced. Further, in this clutch disk 32, since the protrusion 36a and the recess 33a are bonded and fixed, the bonding area becomes larger than when the protrusion 36a and the recess 33a are not provided.

  As described above, in the clutch disk 32, the adhesive strength between the friction facing 33 and the cushioning plate 35 can be improved, and the bonded portion can be prevented from being damaged by a shearing force or the like when the clutch is engaged.

2. Second Embodiment In the first embodiment described above, the protrusion 36a has a conical shape, but other shapes are also conceivable. FIG. 6 shows a schematic sectional view of a clutch disk 132 as a second embodiment of the present invention.

  As shown in FIG. 6, in the clutch disk 132 of this embodiment, the protrusion 136a has a cylindrical shape instead of a conical shape, and has a first facing surface 136b on the outer peripheral side. Since the first facing surface 136b is an outer peripheral surface of the protruding portion 136a having a cylindrical shape, the first facing surface 136b is perpendicular to the rotation plane of the clutch disk 132. Accordingly, the recess 133a of the friction facing 133 also has a shape complementary to the protrusion 136a, and has a second opposing surface 133b that faces the first opposing surface 136b and is perpendicular to the rotation plane on the inner peripheral side. ing.

  In the clutch disk 32 of the first embodiment, since the protrusion 36a has a conical shape, the opposing surfaces of the protrusion 36a and the recess 33a are inclined in the axial direction. That is, the opposed surfaces of the protrusion 36 a and the recess 33 a are not perpendicular to the rotation plane of the clutch disk 32. Accordingly, when the shearing force is received by the protrusion 36a and the recess 33a, the force also acts in the axial direction, that is, the direction in which the friction facing 33 and the flat portion 36 are separated.

  However, in this clutch disk 132, since the first facing surface 136b and the second facing surface 133b are perpendicular to the rotation plane, when receiving the shearing force in the rotational direction and the radial direction by the protrusion 136a and the recess 133a, Power does not work. As a result, the shearing force acting on the adhesive surface of the adhesive layer 138 can be reduced, and the axial tensile force acting on the adhesive layer 138 can also be reduced, and the adhesive strength between the friction facing 133 and the cushioning plate 135 can be reduced. Can be improved more reliably.

3. Third Embodiment In the first and second embodiments described above, a part of the flat portion is fitted in the concave portion of the friction facing, but the following shapes are also conceivable. In FIG. 7, the cross-sectional schematic of the clutch disk 232 as 3rd Embodiment of this invention is shown.

  As shown in FIG. 7, in the clutch disk 232 of the present embodiment, the entire flat portion 236 is fitted in the concave portion 233 a of the friction facing 233. In this case, the first elastic portion 237a and the second elastic portion 237b and the concave portion 233a arranged in the circumferential direction of the flat portion 236 face each other through the adhesive layer 238 in the rotation direction. As a result, as in the first embodiment, the first and second elastic portions 237a and 237b and the recess 233a can receive a shearing force in the rotational direction, and the shearing in the rotational direction acting on the adhesive surface of the adhesive layer 238. The force can be reduced. In this embodiment, as shown in FIG. 7, the angles A1 and A2 between the flat portion 236 and the first facing surface 236b are set to 45, but A1 and A2 are within a range of 45 to 90 degrees, more preferably 60. It should just be in the range of -90 degree | times. Thereby, the adhesive strength between the friction facing 233 and the cushioning plate 235 can be improved. In the present embodiment, A1 and A2 are set to the same angle, but may be set to different angles as long as they are within the above range.

4). Fourth Embodiment In the third embodiment described above, A1 and A2 are set to 45 degrees. However, as described above, a case of 90 degrees is also conceivable. FIG. 8 shows a schematic cross-sectional view of a clutch disk 332 as a fourth embodiment of the present invention.

  As shown in FIG. 8, in the clutch disk 332 of the present embodiment, the entire flat portion 336 protrudes in the axial direction as compared with the flat portion 236 of the third embodiment. Specifically, the flat portion 336 has a pair of first side walls 336a at both ends in the rotation direction. The first side wall 336a is a portion formed perpendicular to the rotation plane of the clutch disk 332, and has a first facing surface 336b perpendicular to the rotation plane. In the present embodiment, the first side wall 336a and the first facing surface 336b are provided perpendicular to the rotation direction. The first side wall 336a is integrally formed with peripheral members from the radially outer side to the inner side of the flat portion 336, for example. The recess 333a is formed in a shape that allows the flat portion 336 to be fitted, and has a second facing surface 333b that faces the first facing surface 336b and is perpendicular to the rotation plane at the circumferential end. In the present embodiment, the second facing surface 333b is provided perpendicular to the rotation direction.

  In the clutch disk 232 of the third embodiment, the first elastic portion 237a and the second elastic portion 237b are slightly inclined with respect to the flat portion 236. For this reason, the opposing surfaces of the elastic portions 237a and 237b and the concave portion 33a are not perpendicular to the rotation plane. Therefore, when the shearing force is received by both the elastic portions 237a and 237b and the concave portion 33a, the force also acts in the axial direction, that is, the direction in which the friction facing 233 and the flat portion 236 are separated.

  However, in this clutch disk 332, since the first opposing surface 336b and the second opposing surface 333b are perpendicular to the rotation plane with respect to the rotation plane, when receiving the shearing force in the rotation direction by the first side wall 336a and the recess 333a. No force acts in the axial direction. Thereby, the shearing force in the rotational direction acting on the adhesive surface of the adhesive layer 338 can be reduced, and the axial pulling force acting on the adhesive layer 338 can also be reduced. The friction facing 333 and the cushioning plate 335 The adhesive strength can be improved more reliably.

  In addition, the cushioning plate 335 and the friction facing 333 are advantageous in strength because the stress is less likely to concentrate than in the case where the protrusions are provided as in the first and second embodiments described above. Further, since the shape changes more slowly than the case where the protrusions are provided, the cushioning plate 335 and the friction facing 333 can be easily manufactured. Furthermore, since it is easy to separately apply the adhesive for each of the recesses 333a, the adjustment of the adhesion location is facilitated, and the adhesion area can be selectively adjusted. This facilitates adjustment of the rigidity of the clutch disk 332.

  Moreover, the case as shown in FIG. 9 is also considered as a first modification of the present embodiment. In the clutch disk 332, the flat portion 336 has only one first side wall 336a. Specifically, as shown in FIG. 9, the first side wall 336 a is formed on the first elastic part 337 a side in the rotation direction of the flat part 336. The side opposite to the first side wall 336a of the flat portion 336 is not in contact with the concave portion 333a in the rotation direction.

  Normally, only one-way torque is transmitted from the flywheel to the clutch disc. Therefore, by appropriately setting the rotational direction of the flywheel and the positional relationship between the first side wall 336a, the first side wall 336a and the recess 333a can reliably receive the shearing force in one rotational direction. For example, in FIG. 9, if a flywheel is arranged on the upper side of the clutch disk 332 in the figure, the rotation direction of the flywheel is appropriate from right to left in the figure.

  Furthermore, a case as shown in FIG. 10 is also conceivable as a second modification of the present embodiment. In the clutch disk 332, the first side wall 336a is formed on the side opposite to the first side wall 336a in the rotational direction of the flat portion 336, contrary to the above-described modification. The side opposite to the first side wall 336a of the flat portion 336 is not in contact with the concave portion 333a in the rotation direction. In consideration of the elastic deformation of the cushioning plate 335 in the axial direction, the side opposite to the first side wall 336a of the recess 333a is formed to be largely oblique.

  Also in this case, the shearing force in one rotational direction can be reliably received as in the first modified example. For example, in FIG. 10, if a flywheel is disposed on the upper side of the clutch disk 332 in the figure, the rotation direction of the flywheel is appropriate from the left to the right in the figure.

  In the first and second modified examples, the first side wall 336a is provided only on the side receiving the force, but the first side wall 336a is also provided on the opposite side, and a gap or the like is provided between the rotation direction with the friction facing 333 side. It is also conceivable to provide In this case, it can be set as embodiment like a 1st and 2nd modification, unifying the shape of the cushioning plate 335. FIG.

5. Fifth Embodiment In the above-described fourth embodiment, the adhesive layer is formed in the portion where the cushioning plate and the friction facing are opposed to each other in the rotational direction, but there may be a case where there is no adhesive layer. FIG. 11 shows a schematic cross-sectional view of a clutch disk 432 as a fifth embodiment of the present invention.

  As shown in FIG. 11, in the clutch disk 432 of this embodiment, the adhesive layer 438 is not formed between the rotation directions of the first side wall 436a of the flat portion 436 and the concave portion 433a of the friction facing 433. Specifically, the first side wall 436a and the concave portion 433a have a first facing surface 436b and a second facing surface 433b facing each other perpendicular to the rotation plane of the clutch disk 432, respectively. The flat portion 436 is fitted in the concave portion 433a, and the first and second opposing surfaces 436b and 433b are in contact with each other. In this case, the same effect as that of the fourth embodiment can be obtained.

  In addition, in this embodiment, although described as a modification of 4th Embodiment, the same effect can be obtained by setting it as the same structure also in 1st-3rd Embodiment.

6). Sixth Embodiment The clutch disks according to the fourth and fifth embodiments described above are designed in consideration of the shearing force in the rotational direction. However, embodiments in which the shearing force in the radial direction due to the centrifugal force when the clutch disk is rotated are also considered. Conceivable. FIG. 12 is a schematic cross-sectional view in the rotational direction of a clutch disk 532 serving as a sixth embodiment of the present embodiment.

  As shown in FIG. 12, in the clutch disk 532 of this embodiment, the flat portion 536 has a second side wall 536a on the radially inner side. The second side wall 536a is a portion formed perpendicular to the rotation plane of the clutch disk 532, and has a third facing surface 536b perpendicular to the rotation plane. In the present embodiment, the second side wall 536a and the third facing surface 536b are provided perpendicular to the radial direction. For example, the second side wall 536a is integrally formed with peripheral members from one side to the other side in the rotation direction of the flat portion 536. The concave portion 533a has a shape in which the outer peripheral side of the friction facing 533 is recessed in the axial direction so that the flat portion 536 can be fitted, and is opposed to the third facing surface 536b at the rotational direction end and perpendicular to the rotational plane. It has the 4th opposing surface 533b. In the present embodiment, the fourth facing surface 533b is provided perpendicular to the radial direction.

  With these configurations, since the third facing surface 536b and the fourth facing surface 533b are perpendicular to the rotation plane in the radial direction, the second sidewall 536a and the concave portion 533a cause a centrifugal force outward in the radial direction, that is, in the radial direction. No force acts in the axial direction when receiving a shearing force. Accordingly, the radial shearing force acting on the adhesive surface of the adhesive layer 538 can be reduced, and the axial tensile force acting on the adhesive layer 538 can also be reduced. The friction facing 533 and the cushioning plate 535 The adhesive strength can be improved more reliably.

  As in the fifth embodiment described above, in this embodiment, there may be a case where the adhesive layer 538 is not formed between the second side wall 536a of the flat portion 536 and the concave portion 533a of the friction facing 533. . Also in this case, the same effect as this embodiment can be obtained.

  In addition, a pair of second side walls 536a may be provided at both ends of the flat portion 536 in the radial direction. In this case, the recessed part 533a has the 4th opposing surface 533b in the outer peripheral side. Also in this case, the same effect as this embodiment can be obtained.

  Furthermore, the configurations of the first to sixth embodiments described above can be applied in combination. In this case, the same effect as each embodiment can be obtained.

7). Seventh Embodiment In the above-described embodiment, it is assumed that the first and second side walls are provided separately, but one type of side wall can have the same function as the first and second side walls. FIG. 13 shows a cushioning plate 635 constituting a clutch disk as a seventh embodiment of the present invention. The upper drawing of FIG. 13 is a plan view of the cushioning plate 635, and the lower drawing is a schematic sectional view in the radial direction.

  In the third to fifth embodiments described above, the first elastic portion 37a and the first side wall 336a are not inclined in a plane with respect to the radial direction. Therefore, the shearing force in the rotational direction can be received, but the shearing force in the radial direction cannot be received. In the sixth embodiment described above, the second side wall 536a is not inclined in a plane with respect to the rotation direction. Therefore, it can receive a shearing force in the radial direction but cannot receive a shearing force in the rotational direction.

  In the present embodiment, as shown in FIG. 13, for example, the cushioning plate 635 of the present embodiment includes a pair of flat portions 636 and a first elastic portion 637a that connects the flat portions 636 so as to be elastically deformable. . The flat portion 636 has a first side wall 636a at one rotational direction end. The first side wall 636a is formed on the first elastic portion 637a side in the rotation direction of the flat portion 636, and has a third facing surface 636b.

  And as shown in FIG. 13, in this embodiment, the 1st elastic part 637a inclines by angle A3 planarly with respect to the radial direction. That is, the first side wall 636a corresponds to the first side wall 336a (FIG. 9) of the first modified example of the fourth embodiment inclined in a plane with respect to the radial direction. In this case, the concave portion (not shown) on the friction facing side is also inclined in a plane with respect to the radial direction.

  In this clutch disc, since the first elastic portion 637a and the corresponding concave portion are inclined in a plane, if the relationship between the rotation direction and the inclination angle A3 is appropriately set, the shear force in the rotation direction and the radial direction can be reduced. A part can be received by the first elastic portion 637a. As a result, the shearing force in the rotational direction and the radial direction can be received with a simple structure, and the structure of the clutch disk can be simplified.

  The inclination angle A3 may be in the range of 0 to 90 degrees, more preferably in the range of 30 to 60 degrees. What is necessary is just to adjust an angle with the difference in the magnitude | size of the shear force of a rotation direction, and the shear force of a radial direction. The first side wall 636a is formed perpendicular to the flat portion 636, but the angle with the flat portion 636 is in the range of 45 to 90 degrees, more preferably in the range of 60 to 90 degrees, as in the third embodiment. If it is in.

B. Method for Producing Clutch Disc The clutch disc according to the present invention can obtain excellent effects in the production process. Below, the manufacturing method of the clutch disk based on this invention is demonstrated.

1. Eighth Embodiment FIG. 14 shows a manufacturing process of a clutch disk manufacturing method as a first embodiment according to the present invention. This manufacturing method mainly includes a friction facing forming step S1, a cushioning plate forming step S2, an assembling step S3, an adhering step S4, and a heating step S5. Each part of the clutch disk 32 is shown in FIG.

  In the friction facing forming step S1, the friction facing 33 is formed. This process is basically the same as the conventional friction facing forming process, but differs in that the recess 33a is formed. For example, the concave portion 33a is formed in advance in a portion corresponding to the concave portion 33a in a molding die. As a result, the concave portion 33a is formed at the same time as the friction facing.

  In the cushioning plate forming step S2, the cushioning plate 35 is formed. Specifically, the outer shapes of the flat portion 36, the first elastic portion 37a, the second elastic portion 37b, and the fixing portion 39 are punched from the plate. The punched plate is bent into a corrugated shape by pressing or the like, and the flat portion 36, the first elastic portion 37a, the second elastic portion 37b, and the fixing portion 39 are formed. At this time, the protrusion 36a described in the first embodiment is formed on the flat portion 36 by press working. In the assembling step S3, the plurality of cushioning plates 35 are assembled to the clutch plate 31a or the jig for positioning the cushioning plate 35 by rivet coupling or the like.

  In the bonding step S4, the friction facing 33 is fixed to the cushioning plate 35 with an adhesive. Specifically, an adhesive is applied to the bonding surface of each flat portion 36. At this time, the adhesive is also applied to the protrusion 36a. Then, the friction facing 33 is pressed against a predetermined position of the cushioning plate 35. At this time, the protrusion 36 a of the flat portion 36 is fitted into the recess 33 a of the friction facing 33. As a result, the friction facing 33 and the cushioning plate 35 can be easily positioned as compared with the conventional case. Thereby, the labor of the positioning operation during the bonding operation can be reduced, and the positioning accuracy between the friction facing 33 and the cushioning plate 35 can be increased.

  In the heating step S5, the molded friction facing 33 is baked, and the adhesive strength between the friction facing 33 and the cushioning plate 35 bonded in the bonding step S4 is increased. Specifically, the heat treatment is performed with the friction facing 33 compressed in the axial direction. Comparing the firing process of the friction facing 33 and the drying process of the adhesive, the heating temperature is about 200 ° C., but the heating time is about 10 to 20 hours for the former and about 1 hour for the latter. is there. Therefore, in the heating step S <b> 5, heating is performed at around 200 ° C. for about 10 to 20 hours in accordance with the firing step of the friction facing 33. As a result, the friction facing 33 is fired and the adhesive is cured to form the adhesive layer 38. Thereafter, the clutch disk 32 is naturally cooled, and the clutch disk 32 is completed. At this time, the friction facing 33 contracts due to cooling. However, in the clutch disk 32, the protrusion 36a and the recess 33a of the flat portion 36 are fitted in the bonding step S4, so that the friction facing 33 around the adhesive layer 38 is cooled. Time contraction can be suppressed. As a result, it is possible to prevent peeling of the adhesive due to shrinkage during cooling of the friction facing 33. Thereby, the baking process of the friction facing 33 and the drying process of an adhesive agent can be made into the same process, and the manufacturing process of the clutch disc 32 can be shortened.

  In this embodiment, the method for manufacturing the clutch disk 32 according to the first embodiment is described. However, the same effect can be obtained even with the method for manufacturing the clutch disk according to the second to sixth embodiments. it can. Here, since the description content overlaps with the manufacturing method of the present embodiment, detailed description is omitted.

C. Other Embodiments The present invention is not limited to the above-described embodiments, and various modifications or corrections can be made without departing from the scope of the present invention.

(1) Flat part In the above-mentioned embodiment, although the flat part of each cushioning plate is made into the member of the same shape, it is not limited to this, The same effect is acquired even if it has a different shape. Further, the shape of the cushioning plate is not limited to the shape of each embodiment, and the same effect can be obtained even if the shape is other than those. For example, each cushioning plate may be connected in the circumferential direction by an annular connecting member. In this case, the coupling strength of the cushioning plate can be improved, and the strength of the clutch disk can be improved. Moreover, the bonding work in the bonding process is facilitated. For example, when the assembly process is performed as positioning of the cushioning plate, the positioning of the cushioning plate is not required by the connecting member, so that the assembly process can be omitted.

(2) Protruding part and concave part In the first and second embodiments described above, the shape of the projecting part of the flat part is described as a conical shape or a cylindrical shape, but the present invention is not limited to this. It is only necessary that a part of the flat portion protrudes toward the friction facing. The same applies to the concave portion of the friction facing.

  Moreover, although four protrusion parts are formed with respect to one flat part, it is not limited to this. Various patterns and arrangements of the protrusions 36a can be considered depending on the sizes of the flat part 36 and the protrusions 36a.

(3) First to Fourth Opposing Surfaces In the second embodiment described above, the first and second opposing surfaces 136b and 133b are referred to as being perpendicular to the rotation plane. The opposing surface of 133a does not have to be perpendicular to the rotation plane over the entire surface. It is only necessary that the surface receiving the shearing force is perpendicular to the rotation plane.

  In the fourth and fifth embodiments described above, the first side wall and the recess have the first and second opposing surfaces perpendicular to the rotation direction, but the present invention is not limited to this. The first and second opposing surfaces may be surfaces that are perpendicular to the rotation plane of the clutch disk.

  Furthermore, in the above-described sixth embodiment, the second side wall and the recess have the third and fourth opposing surfaces perpendicular to the radial direction, but the present invention is not limited to this. The third and fourth opposing surfaces may be surfaces that are perpendicular to the rotation plane of the clutch disk.

(4) Bonding Step In the above-described embodiment, the adhesive is applied to the flat portion 36 in the bonding step, but the adhesive may be applied to the concave portion 33a of the friction facing 33.

(5) Type of clutch device Although the pull-type clutch device is described in the above-described embodiment, the present invention is not limited to this. For example, a push-type clutch device may be used.

1 is a schematic longitudinal sectional view of a clutch device 1 in which a clutch disk 32 as a first embodiment of the present invention is employed. 1 is a schematic plan view of a clutch device 1 in which a clutch disk 32 as a first embodiment of the present invention is employed. 1 is a schematic plan view of a clutch disk 32 as a first embodiment of the present invention. AA sectional drawing of FIG. The figure which shows the deformation | transformation state of the clutch disc 32. FIG. The cross-sectional schematic of the clutch disc 132 as 2nd Embodiment of this invention. The cross-sectional schematic of the clutch disk 232 as 3rd Embodiment of this invention. Sectional schematic of the clutch disk 332 as 4th Embodiment of this invention. The 1st modification of 4th Embodiment. The 2nd modification of 4th Embodiment. Sectional schematic of the clutch disk 432 as 5th Embodiment of this invention. Sectional schematic of the clutch disk 532 as 6th Embodiment of this invention. A clutch disk cushioning plate 635 according to a seventh embodiment of the present invention. The manufacturing process figure of the clutch disk as 8th Embodiment of this invention.

Explanation of symbols

1 Clutch device 2 Flywheel (input rotating body)
3 Clutch disc assembly 4 Clutch cover assembly 5 Input shaft (output rotating body)
30 spline hub 31 damper mechanism 32 clutch disk 33 friction facing 33a recess 35 cushioning plate 36 flat part 36a protrusion 37a first elastic part 37b second elastic part 38 adhesive layer (adhesion fixing part)
39 fixing part 136b first opposing surface 133b second opposing surface S1 friction facing forming step S2 cushioning plate forming step S3 assembly step S4 bonding step S5 heating step

Claims (19)

A clutch disk of a clutch disk assembly for transmitting torque by friction engagement from an input rotating body to an output rotating body,
A pair of annular friction facings disposed axially opposite each other and frictionally engaged with the input rotor;
A plurality of cushioning plates provided between the pair of friction facings so as to be elastically deformable and having a pair of flat portions disposed opposite to the pair of friction facings;
Comprising at least one adhesive fixing portion for fixing the friction facing and the flat portion with an adhesive;
The friction facing has at least one recess on a side facing the flat portion,
At least a part of the flat portion is fitted in the recess,
Clutch disc. The flat portion has at least one protrusion that fits into the recess.
The clutch disk according to claim 1. The protrusion and the recess are fixed by the adhesive fixing portion.
The clutch disk according to claim 2. The protrusion has a first facing surface perpendicular to the rotation plane,
The recess has a second facing surface that faces the first facing surface and is perpendicular to the rotation plane.
The clutch disk according to claim 2 or 3. The entire flat portion is fitted in the recess,
The entire flat portion and the concave portion are fixed by the adhesive fixing portion.
The clutch disk according to claim 1. The flat portion has a first facing surface facing the rotation direction at the rotation direction end,
The recess has a second facing surface that faces the first facing surface and faces the rotation direction.
The clutch disk according to claim 5. The angle between the flat portion and the first facing surface is within a range of 45 to 90 degrees.
The clutch disk according to claim 6. An angle between the flat portion and the first facing surface is in a range of 60 to 90 degrees.
The clutch disk according to claim 6. The flat portion has a third facing surface facing a radial direction at a radial end portion;
The concave portion has a fourth opposing surface facing the third opposing surface and facing the radial direction.
The clutch disk according to any one of claims 5 to 8. The third facing surface faces radially inward;
The clutch disk according to claim 9. The angle between the flat portion and the third facing surface is within a range of 45 to 90 degrees.
The clutch disk according to claim 9 or 10. An angle between the flat portion and the third facing surface is in a range of 60 to 90 degrees.
The clutch disk according to claim 9 or 10. The flat portion has a fifth facing surface facing a rotational direction and a radial direction at a radial end portion;
The recess has a sixth facing surface facing the fifth facing surface.
The clutch disk according to claim 5. The fifth facing surface faces the direction opposite to the rotation direction of the input rotating body and the inside in the radial direction.
The clutch disk according to claim 13.
A clutch disk assembly for transmitting torque by frictional engagement from an input rotator to an output rotator,
A clutch disk according to any one of claims 1 to 14,
A damper mechanism disposed between the clutch disk and the output rotator, for elastically connecting the clutch disk and the output rotator in a rotational direction;
A clutch disk assembly comprising: A clutch device for transmitting and interrupting torque from an input rotator to an output rotator,
A clutch disk assembly according to claim 15;
A clutch cover coupled to the input rotator, a pressing member provided on the clutch cover so as not to be relatively rotatable, and for pressing the friction facing against the input rotator; A clutch cover assembly that is provided so as to be elastically deformable and has a biasing member that biases the pressing member toward the input rotating body;
A clutch device comprising: A pair of annular friction facings which are arranged opposite to each other in the axial direction and frictionally engage with the input rotating body; and a plurality of cushioning plates for elastically connecting the pair of friction facings in the axial direction A clutch disk manufacturing method for a clutch disk assembly comprising:
A cushioning plate forming step of forming a cushioning plate having a pair of flat portions disposed opposite to the pair of friction facings;
A friction facing forming step of forming a pair of friction facings having a recess that fits into at least a part of the flat portion;
An adhesive is applied to at least one of the friction facing and the flat portion, and at least a part of the flat portion and the concave portion are fitted to each other so that the friction facing and at least one flat portion are bonded with the adhesive. Fixing process to fix,
A method of manufacturing a clutch disk containing The cushioning plate forming step further includes a step of processing at least one protrusion fitted into the recess into the flat portion.
The clutch disk according to claim 17. In the friction facing molding step, the concave portion is molded so that the entire flat portion can be fitted.
The clutch disk according to claim 17.

Images