JP4054504B2 - Clutch device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to a clutch device, and more particularly to a clutch device capable of separately performing torque transmission / cut-off operation from an engine crankshaft to a first and second input shafts of a transmission.
[0002]
[Prior art]
  The clutch device is a device for transmitting torque from the crankshaft of the engine to the transmission and interrupting the torque transmission as necessary. The clutch device is adapted for friction between the flywheel fixed to the crankshaft and the friction surface of the flywheel. The clutch disk assembly includes a coupling portion, and a clutch cover assembly that is fixed to the flywheel and biases the friction coupling portion to the friction surface of the flywheel and releases the biasing as necessary.
[0003]
  In the clutch device, there is a double clutch capable of separately transmitting torque or blocking torque transmission to two input shafts extending from the transmission. Such a double clutch has a friction drive plate to which torque is input from the crankshaft of the engine. A first friction surface is formed on the axial engine side of the friction drive plate, and a second friction surface is formed on the axial transmission side. Further, a first friction coupling portion of the first clutch disk assembly is disposed in the vicinity of the first friction surface. The first clutch disk assembly is connected to the first input shaft. A second friction coupling portion of the second clutch disk assembly is disposed in the vicinity of the second friction surface. The second clutch disk assembly is connected to the second input shaft. Furthermore, a first pressure plate is disposed on the opposite side of the first friction coupling portion from the friction drive plate. Further, a second pressure plate is disposed on the opposite side of the first friction coupling portion from the friction drive plate.
[0004]
  In the double clutch shown in U.S. Pat. No. 4,966,270, the first pressure plate and the second pressure plate each frictionally drive each friction coupling portion by hydraulic pressure supplied from separate oil passages formed in the clutch housing. It is designed to be biased toward the plate side. The first hydraulic working chamber for driving the first pressure plate is formed in the transmission side portion of the clutch housing, and the second hydraulic working chamber for driving the second pressure plate is formed in the engine side portion of the clutch housing.
[0005]
  Further, in the double clutch shown in US Pat. No. 4,710,147, first and second annular pistons are arranged in first and second annular hydraulic chambers formed in a transmission side portion of the clutch housing. The first piston can drive the first pressure plate by a plurality of pins. The second annular piston can drive the second pressure plate by a plurality of pins.
[0006]
  As described above, in the structure in which the pressure plate, in particular, the hydraulic chamber for driving the first pressure plate is formed in the clutch housing, the axial length of the clutch housing is increased, and the structure is further complicated. . An object of the present invention is to realize a clutch device of a double clutch with a simple structure.
[0007]
[Means for Solving the Problems]
  The clutch device according to claim 1 can perform torque transmission / cut-off operation separately from the crankshaft of the engine to the first and second input shafts of the transmission,,With flywheel,A first clutch disk assembly;,A second clutch disc assembly;,With the first pressure plate,Elastic member and release mechanism,With the second pressure plate,With clutch mechanismWith clutch coverIt has. The friction coupling member has a first friction surface on the axial engine side and a second friction surface on the axial transmission side. Torque is input from the crankshaft to the friction coupling member. The flywheel is connected to the crankshaft. The first clutch disc assembly has a first friction coupling portion disposed in proximity to the first friction surface, and can transmit torque to the first input shaft. The second clutch disk assembly has a second friction coupling portion arranged in the vicinity of the second friction surface, and can transmit torque to the second input shaft. The first pressure plate is disposed close to the axial engine side of the first friction coupling member. The elastic member is a member that is supported by the flywheel and biases the first pressure plate toward the first friction coupling portion. The release mechanismBy having a lever member and moving the lever memberThis is a mechanism for pulling the first pressure plate away from the first friction coupling portion. The second pressure plate is disposed close to the axial transmission side of the second friction coupling portion. The clutch mechanismHaving a diaphragm spring,Arranged near the release mechanism,By driving the diaphragm springThis is a mechanism for urging and separating the second pressure plate from the second frictional connecting portion.The friction coupling member rotates integrally with the second friction surface, and is disposed to face the second friction surface with an interval on the axial transmission side. The annular portion and the annular portion are integrated with each other. A first extension formed and extending axially from the annular portion; a second extension formed integrally with the annular portion and extending from the annular portion toward the inner peripheral side than the first extension; and the first extension An annular second member fixed to the tip, a first support formed on the two members to contact the lever member to support the release mechanism, and formed on the second extension to contact the diaphragm spring A clutch cover having a second support portion for supporting the clutch mechanism;
  In this clutch device, the first pressure plate is urged toward the first friction coupling portion by the elastic member. For this reason, it is not necessary to provide an oil passage or a hydraulic working chamber for driving the first pressure plate, and the structure of the entire clutch device is simplified.Also,In this clutch device, since the first support portion of the clutch cover supports the release mechanism and the second support portion supports the clutch mechanism, the number of parts can be reduced.
[0008]
  Claim2In the clutch device according to claim 1,1The clutch cover includes an annular portion, a first portion extending from the annular portion toward the axial transmission side and having a first support portion, and a second portion extending from the annular portion toward the axial transmission side and having a second support portion. .
[0009]
  In this clutch device, since the first part having the first support part, the second part having the second support part, and the annular part are formed of an integral member, the structure is simple.
[0010]
  Claim3In the clutch device according to claim 1,2The first portion includes a plurality of first extensions extending from the annular portion toward the axial transmission side, and an annular member fixed to the first extension and forming a first support portion. The second portion has a plurality of second extensions that extend from the annular portion toward the axial transmission and form a second support.
[0011]
  In this clutch device, since the first support portion is formed by the annular member, the release mechanism can be supported more stably.
[0012]
  Claim4In the clutch device according to claim 1,3The second extension portion extends radially inward relative to the first extension portion, whereby the second support portion is positioned on the axial engine side with respect to the first support portion.
[0013]
  In this clutch device, since the second support portion and the first support portion have different axial positions, it is possible to arrange another member between the axial directions.
[0014]
  Claim5In the clutch device according to claim 1,4The release mechanism includes a release member and a lever member. One end of the release member is in contact with the first pressure plate from the axial transmission side, and the other end is positioned near the first portion. The lever member can contact the first support portion and the other end to move the release member toward the axial direction engine. The release member has a drive member. The drive member has an annular portion supported by the first pressure plate, and a plurality of axially extending portions extending from the annular portion toward the axial transmission side and penetrating the friction coupling member. The plurality of axially extending portions extend between the rotation directions of the plurality of second extensions and radially inward of the second extensions.
[0015]
  In this clutch device, since the plurality of axially extending portions of the release member extend radially inward of the first extending portion, it is not necessary to provide a through hole in the clutch cover.
[0016]
  Claim6The clutch device according to claim 1,4In any of the above, the release mechanism has a release member and a lever member. One end of the release member is in contact with the first pressure plate from the axial transmission side, and the other end is positioned near the second portion. The lever member is in contact with the first support portion and the other end, and can move the release member toward the axial direction engine.
[0017]
  In this clutch device, the first pressure plate can be separated from the first friction coupling portion by the lever member driving the release member.
[0018]
  Claim7In the clutch device according to claim 1,6The release member has a drive member. The drive member includes an annular portion supported by the first pressure plate, and a plurality of axially extending portions extending from the annular portion toward the axial transmission side and penetrating the friction coupling member.
[0019]
  In this clutch device, since the annular portion of the drive member is supported by the first pressure plate, the posture is easily stabilized.
[0020]
  Claim8In the clutch device according to claim 1,5 or 7The drive member further includes an annular contact portion that is fixed to the distal end of the axially extending portion and contacts the lever member.
[0021]
  In this clutch device, the contact with the lever member is stabilized by providing the annular contact portion.
[0022]
  Claim9In the clutch device according to claim 1,8The annular abutment portion is detachable in the axial direction from the axially extending portion.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
  FIG. 1 shows a schematic longitudinal sectional view of a clutch device 1 as an embodiment of the present invention.
[0024]
  The clutch device 1 is a device for transmitting and interrupting torque from the crankshaft 2 of the engine to the first and second input shafts 3 and 4 of the transmission. An engine (not shown) is arranged on the left side of FIG. 1, and a transmission (not shown) is arranged on the right side of FIG. The first input shaft 3 is a cylindrical shaft extending from the transmission side. The tip of the first input shaft 3 extends to the vicinity of the tip of the crankshaft 2. The second input shaft 4 is a substantially cylindrical shaft extending around the first input shaft 3 from the transmission side. The distal end of the second input shaft 4 is positioned on the axial transmission side with respect to the first input shaft. A plurality of spline teeth extending in the axial direction are formed on the outer peripheral surfaces of both the input shafts 3 and 4.
[0025]
  The clutch device 1 mainly includes a flywheel 7, a friction drive plate 8, a clutch cover 9, a first clutch disk assembly 13, a second clutch disk assembly 14, a first clutch mechanism 16, and a first clutch mechanism 16. A two-clutch mechanism 17.
[0026]
  The flywheel 7 is a disk-like and annular member fixed to the tip of the crankshaft 2. The flywheel 7 is a member having a relatively large axial thickness. The inner peripheral portion of the flywheel 7 is fixed to the crankshaft 2 by a plurality of bolts 31.
[0027]
  The bolt 31 extends through a hole formed in the flywheel 7 and is screwed into a bolt hole 32 formed in the crankshaft 2. Further, an outer peripheral cylindrical portion 34 extending toward the axial transmission side is formed on the outer peripheral portion of the flywheel 7. A plurality of bolt holes 36 are formed at the axial transmission side end of the outer cylindrical portion 34. An engine starting ring gear 35 is fixed to the outer peripheral surface of the flywheel 7.
[0028]
  The friction drive plate 8 is a disk-like and annular member disposed on the flywheel 7 on the transmission side in the axial direction with a space therebetween. The outer diameter of the friction drive plate 8 is substantially equal to the outer diameter of the flywheel 7. However, the inner diameter of the friction drive plate 8 is larger than the inner diameter of the flywheel 7. The friction drive plate 8 has a first friction surface 8a on the axial engine side and a second friction surface 8b on the axial transmission side. Further, the outer peripheral portion of the friction drive plate 8 is in contact with the outer peripheral cylindrical portion 34 of the flywheel 7, and further has a hole 8 c at a position corresponding to the bolt hole 36.
[0029]
  The clutch cover 9 is a generally annular member made of sheet metal. The clutch cover 9 is fixed so as to rotate integrally with the friction drive plate 8 and the flywheel 7 by a bolt (not shown). Specifically, a bolt (not shown) passes through a hole 8 c formed in the friction drive plate 8 and is screwed into the bolt hole 36 of the flywheel 7. The clutch cover 9 is composed of a first member 37 and a second member 41. The first member 37 includes an annular part 38 and a first extension part 39 and a second extension part 40 that extend from the annular part 38 toward the axial transmission side. The annular portion 38 is in contact with the outer peripheral portion of the friction drive plate 8 in the axial direction transmission side. Further, the annular portion 38 is formed with a hole 38a through which the aforementioned bolt passes. As shown in FIGS. 2 and 4, the first extension portions 39 and the second extension portions 40 are alternately formed in the rotation direction. The first extension 39 extends substantially straight in the axial direction. A second member 41 is fixed to the tip of the first extension 39. The second member 41 is a substantially annular member made of a sheet metal member, and includes a substantially cylindrical portion 41a extending from the first extension 39 to the axial transmission side, and a disc-shaped portion 41b extending from the tip to the inner peripheral side. Have. An annular protrusion 56 that protrudes toward the axial engine side is formed on the inner peripheral side of the disc-shaped portion 41b. The second extension 40 extends to the inner peripheral side compared to the first extension 39. As a result, the second extension 40 is positioned closer to the axial engine side than the second member 41. Further, the second extension portion 40 is formed with a support portion 58 that protrudes toward the axial engine side.
[0030]
  The first clutch disk assembly 13 is a mechanism for outputting torque to the first input shaft 3. The first clutch disk assembly 13 has a first friction coupling portion 44 on the outer peripheral side thereof. The first friction coupling portion 44 is disposed close to the first friction surface 8 a of the friction drive plate 8, that is, on the axial engine side of the friction drive plate 8. Further, the first clutch disk assembly 13 has a damper mechanism for absorbing and dampening torsional vibration including a plurality of springs, a friction generating mechanism, and the like. Further, the inner peripheral surface of the first clutch disk assembly 13 is spline engaged with the first input shaft 3.
[0031]
  Next, the first clutch mechanism 16 will be described. The first clutch mechanism 16 is a mechanism for urging the first friction coupling portion 44 to the friction drive plate 8 and releasing the urging force as necessary. The first clutch mechanism 16 mainly includes a first pressure plate 19, a cone spring 20, and a release mechanism 21. The first pressure plate 19 is an annular member disposed on the axial direction engine side of the first friction coupling portion 44. The first pressure plate 19 is fixed by a plate (not shown) or the like so as to rotate integrally with the flywheel 7 or the friction drive plate 8 and to be movable in the axial direction. The cone spring 20 is an urging elastic member disposed between the first pressure plate 19 and the flywheel 7 in the axial direction. The outer peripheral end of the cone spring 20 is supported by an annular support portion 61 of the first pressure plate 19, and the inner peripheral end is supported by an annular support portion 62 formed on the flywheel. The inner peripheral surface of the cone spring 20 is supported by a peripheral surface 33 formed on the flywheel 7 and positioned in the radial direction. In this state, the cone spring 20 is compressed in the axial direction, and as a result, a biasing force toward the axial transmission side is applied to the first pressure plate 19.
[0032]
  The release mechanism 21 mainly includes a release member 22 and a lever member 23. The release member 22 includes a driving member 24 extending in the axial direction and a support portion forming member 25. As shown in FIG. 3, the drive member 24 is a substantially cylindrical member, and includes a ring-shaped seat portion 48 and a plurality of axial extensions 49 extending from the seat portion 48 toward the axial transmission side. . The axial engine side end of the seating portion 48 is in contact with a groove 19 a formed on the outer peripheral edge of the first pressure plate 19 on the axial transmission side. Further, the inner peripheral surface on the front end side of the seating portion 48 abuts on the outer peripheral surface of the groove 19a and is positioned in the radial direction. By providing the annular seating portion 48 in this way, the posture of the release member 22 with respect to the first pressure plate 19 is stabilized. As shown in FIGS. 1 and 2, the axial extension 49 passes through the axial through-hole 47 of the friction drive plate 8 in the axial direction, and the tip is from the end of the friction drive plate 8 on the axial transmission side. It protrudes further. The tip of the axial extension 49 is a bent portion 50 that is bent inward in the radial direction and further extends in the axial direction. The support portion forming member 25 is a member for forming an annular support portion on the release member 22 and can be easily attached to and detached from the release member 22 from the axial transmission. The support portion forming member 25 is a substantially annular sheet metal member, and includes a disc-like portion 51 and a cylindrical portion 52 that extends from the outer peripheral end to the axial transmission side. The disc-like portion 51 is formed with an annular protrusion 54 that protrudes toward the axial transmission side. The protrusion 54 is located on the outer peripheral side of the protrusion 56. The tip of the cylindrical part 52 protrudes to the outer peripheral side of the bent part 50. In addition, the tubular portion 52 is formed with a bent portion 53 that is cut and bent and comes into contact with the inner peripheral side of the bent portion 50. The bent portion 53 is located in the middle of the rotating direction of the bent portion 50. In this way, the bent portion 50 is sandwiched between the radial direction of the tubular portion 52 and the bent portion 53, whereby the support portion forming member 25 is axially transmitted with respect to the tip of each axial extension portion 49. It is detachable on the side, but is engaged so as to be immovable in the radial direction and other directions.
[0033]
  The lever member 23 is an annular and disk-shaped plate member. It is preferable that the lever member 23 has almost no elastic function by a slit formed alternately from the inner peripheral edge and the outer peripheral edge in a disk-shaped plate, for example, and simply functions as a lever. The outer peripheral end of the lever member 23 is in contact with the protruding portion 54 of the supporting portion forming member 25 from the axial transmission side, and the inner peripheral portion is in contact with the protruding portion 56 of the clutch cover 9 from the axial engine side. . In the structure described above, when the inner peripheral end of the lever member 23 is moved to the axial transmission side, the outer peripheral end of the lever member 23 rotates to the axial engine side with the protruding portion 56 of the clutch cover 9 as a fulcrum. Then, the release member 22 is moved to the axial direction engine side. As a result, the first pressure plate 19 overcomes the urging force from the cone spring 20 and moves away from the first friction coupling portion 44.
[0034]
  The first drive mechanism 64 is a mechanism for performing a clutch release operation with respect to the first clutch disk assembly 13 by driving the lever member 23. The first drive mechanism 64 mainly includes a release bearing 67, a hydraulic cylinder 68, and a first hydraulic circuit 69. The release bearing 67 mainly includes an inner race, an outer race, and a plurality of rolling elements disposed between the inner race and the outer race, and can receive a radial load and a thrust load. A cylindrical retainer 71 is attached to the outer race of the release bearing 67. The retainer 71 includes a cylindrical portion that contacts the outer peripheral surface of the outer race, a first flange that extends radially outward from the axial engine side end of the cylindrical portion, and a radially inner side from the axial transmission side end of the cylindrical portion. And a second flange abutting against the axial transmission side surface of the outer race. The first flange is formed with an annular support portion that is in contact with the radially inner end of the lever member 23 from the axial engine side.
[0035]
  The hydraulic cylinder 68 is mainly composed of a hydraulic chamber constituent member 79 and a piston 72. The hydraulic chamber constituting member 79 constitutes a hydraulic chamber between it and a cylindrical piston 72 arranged on the inner peripheral side thereof. Hydraulic pressure can be supplied from the first hydraulic circuit 69 into the hydraulic chamber. The piston 72 is a substantially cylindrical member, and the inner peripheral surface thereof is supported by a hydraulic cylinder 77 described later. Further, the piston 72 has a flange that comes into contact with the inner race of the release bearing 70 from the axial engine side. In this state, when the hydraulic oil in the hydraulic chamber is drained from the first hydraulic circuit 69, the piston 72 moves the release bearing 70 to the axial transmission side.
[0036]
  The second clutch disk assembly 14 is a mechanism for outputting torque to the second input shaft 4 of the transmission. The second clutch disk assembly 14 has a second friction coupling portion 45 on the outer periphery thereof. The second friction coupling portion 45 is disposed close to the second friction surface 8 b of the friction drive plate 8, that is, on the axial engine side of the friction drive plate 8. The second clutch disk assembly 14 has a damper composed of a plurality of springs and a friction generating mechanism. Further, the inner peripheral portion of the second clutch disk assembly 14 is spline-engaged with the second input shaft 4.
[0037]
  Next, the second clutch mechanism 17 will be described. The second clutch mechanism 17 is a mechanism for urging the second friction coupling portion 45 of the second clutch disk assembly 14 with respect to the friction drive plate 8 and releasing the urging. The second clutch mechanism 17 is mainly composed of a second pressure plate 27 and a diaphragm spring 28. The second pressure plate 27 is an annular member disposed close to the axial transmission side of the second friction coupling portion 45 of the second clutch disk assembly 14. The second pressure plate 27 is fixed so as to rotate integrally with the clutch cover 9 or the friction drive plate 8 by an unillustrated plate or the like and to be movable in the axial direction. The diaphragm spring 28 is a generally disc-shaped and annular plate member, and has an outer peripheral elastic portion 28a and a plurality of lever portions 28b extending from the inner peripheral end to the inner peripheral side. The elastic portion 28 a has an outer peripheral end supported by the support portion 58 of the clutch cover 9 and an inner peripheral end supported by the support portion 59 of the second pressure plate 27. The elastic portion 28a is compressed in the axial direction, thereby applying a biasing force toward the axial engine side to the second pressure plate 27. A stop plate 42 is fixed to the pressure plate 27 on the axial transmission side by bolts 43. The stop plate 42 extends between the plurality of lever portions 28b, and is in contact with the inner peripheral end of the elastic portion 28a from the axial transmission side. Thereby, when the inner peripheral end of the lever portion 28b is moved to the axial transmission side, the inner peripheral end of the elastic portion 28a is moved to the axial transmission side accordingly, and the urging force to the pressure plate 27 is released. The pressure plate 27 is moved along the axial transmission side.
[0038]
  The second drive mechanism 65 is a mechanism for performing a clutch release operation with respect to the second clutch disk assembly 14 by driving the diaphragm spring 28. The second drive mechanism 65 mainly includes a release bearing 76, a hydraulic cylinder 77, and a second hydraulic circuit 78. The release bearing 76 mainly includes an inner race, an outer race, and a plurality of rolling elements disposed between the inner race and the outer race, and can receive a radial load and a thrust load. A cylindrical retainer 80 is attached to the outer race of the release bearing 76. The retainer 80 includes a cylindrical portion that contacts the outer periphery of the outer race, a first flange that extends radially outward from the axial engine side end of the cylindrical portion, and a radially inner side from the axial transmission side end of the cylindrical portion. And a second flange that contacts the surface of the outer race on the axial transmission side. The first flange is formed with an annular support portion that comes into contact with the radially inner end of the lever portion 28b from the axial engine side. The hydraulic cylinder 77 includes a piston 81 and a hydraulic chamber constituent member 82. The hydraulic chamber constituent member 82 constitutes a hydraulic chamber between the piston 81 disposed on the inner peripheral side thereof. The hydraulic pressure can be supplied from the second hydraulic circuit 78 into the hydraulic chamber. The piston 81 is a cylindrical member, and an inner peripheral surface thereof is supported by an outer peripheral surface of a member (not shown) extending from the transmission side. Furthermore, the piston 81 has a flange that comes into contact with the inner race of the release bearing 76 from the axial engine side. In this state, when the hydraulic oil in the hydraulic chamber is drained from the second hydraulic circuit 78, the piston 81 moves to the axial transmission side to move the release bearing 76. As described above, the first clutch mechanism 16 and the second clutch mechanism 17 are driven by the independent first and second drive mechanisms 64 and 65, respectively.
[0039]
  Further, in the first clutch mechanism 16, the urging force to the first first pressure plate 19 is given by the cone spring 20 which is a spring member, so that the structure corresponding to the flywheel 7 and the clutch cover 9 has an oil path and an operation. There is no need to form an oil chamber. Therefore, the entire structure of the clutch device 1 is simplified, the number of parts is reduced, and the overall size can be reduced.
[0040]
  In particular, the clutch cover 9 has a protruding portion 56 for the first clutch mechanism 16 and a support portion 58 for the second clutch mechanism 17 in spite of being an integral member as a whole. The structure is simple and the increase in the number of parts can be suppressed, contributing to space saving.
[Modification]
  The present invention is not limited to the embodiment.
[0041]
  For example, in the first clutch mechanism and the second clutch mechanism, the clutch release operation is a pull-type operation in which the inner peripheral side with the lever member is pulled out to the axial transmission side, but these may be changed to a push type.
[0042]
  In the second clutch mechanism 17, the diaphragm spring having the functions of both the elastic member and the lever member is used. However, the structure may be such that both functions are provided to different members.
[0043]
  Further, the diaphragm spring of the second clutch mechanism is a lever member that does not give its own elastic force to the second pressure plate, so that the pressure plate is biased by the axial force from the second drive mechanism. Also good. Further, the flywheel may be a combination of a disk-shaped member and an inertia member fixed to the outer peripheral side instead of an integral member.
[0044]
  The protrusions and the like for supporting the springs and levers are not annular and may have a shape divided into a plurality in the circumferential direction.
[0045]
【The invention's effect】
  In the clutch device according to the present invention, since the first pressure plate is urged toward the first friction coupling portion by the elastic member, there is no need to provide an oil passage or a hydraulic working chamber for driving the first pressure plate. The entire structure of the clutch device is simplified.
[Brief description of the drawings]
FIG. 1 is a schematic longitudinal sectional view of a clutch device in which an embodiment of the present invention is employed.
FIG. 2 is a partial cross-sectional plan view for explaining a configuration of a clutch cover.
FIG. 3 is a view taken along the arrow III in FIG. 1 for explaining a release member.
FIG. 4 is a partial perspective view of a clutch cover.
[Explanation of symbols]
1 Clutch device
2 Crankshaft
3 First input shaft
4 Second input shaft
7 Flywheel
8 Friction drive plate
9 Clutch cover
13 First clutch disc assembly
14 Second clutch disc assembly
16 First clutch mechanism
17 Second clutch mechanism
39 First Extension
40 Second extension
41 Second member

Claims (9)

A clutch device capable of operating torque transmission / disconnection separately from an engine crankshaft to a transmission first and second input shafts,
A flywheel coupled to the crankshaft;
A friction coupling member having a first friction surface on the axial engine side and a second friction surface on the axial transmission side, to which torque is input from the crankshaft;
A first clutch disk assembly having a first friction coupling portion disposed in proximity to the first friction surface and capable of transmitting torque to the first input shaft;
A second clutch disk assembly having a second friction coupling portion disposed close to the second friction surface and capable of transmitting torque to the second input shaft;
A first pressure plate disposed proximate to the axial engine side of the first friction coupling portion;
An elastic member supported by the flywheel for biasing the first pressure plate toward the first friction coupling portion;
A release mechanism for moving the lever member to separate the first pressure plate from the first friction coupling portion;
A second pressure plate disposed proximate to the axial transmission side of the second friction coupling portion;
A clutch mechanism having a diaphragm spring , disposed in the vicinity of the release mechanism, and driving the diaphragm spring to urge and separate the second pressure plate from the second friction coupling portion;
The friction coupling member rotates integrally with the second friction surface, and is disposed so as to face the second transmission surface with an interval on the axial transmission side. The annular portion and the annular portion are integrated with each other. A first extension formed and extending axially from the annular portion; a second extension formed integrally with the annular portion and extending from the annular portion toward the inner peripheral side of the first extension; and the first extension An annular second member fixed to the tip, a first support formed on the two members to contact the lever member to support the release mechanism, and formed on the second extension to contact the diaphragm spring A clutch cover having a second support portion for supporting the clutch mechanism;
A clutch device comprising: The clutch cover includes an annular portion, a first portion having the first support portion extending from the annular portion toward the axial transmission side, and a second portion extending from the annular portion toward the axial transmission side and having the second support portion. and a portion, a clutch device according to claim 1. The first portion has a plurality of first extensions extending from the annular portion toward the axial transmission side, and an annular member fixed to the first extension and forming the first support portion,
3. The clutch device according to claim 2 , wherein the second portion includes a plurality of second extending portions that extend from the annular portion toward the axial transmission side to form the second support portion. It said second extension portion extends radially inwardly with respect to said first extension portion, whereby said second support portion is positioned toward the engine in the axial direction than the first supporting portion, to claim 3 The clutch device as described. The release mechanism has one end in contact with the first pressure plate from the axial transmission side and the other end in contact with the release member positioned near the first portion, the first support portion, and the other end. And a lever member capable of moving the release member toward the axial engine side,
The release member has a drive member,
The drive member includes an annular portion supported by the first pressure plate, and a plurality of axially extending portions extending from the annular portion toward the axial transmission side and penetrating the friction coupling member.
5. The clutch device according to claim 4 , wherein the plurality of axially extending portions extend between rotation directions of the plurality of second extending portions and radially inward of the first extending portion. The release mechanism has one end in contact with the first pressure plate from the axial transmission side and the other end in contact with the release member located near the first portion, the first support portion, and the other end. The clutch device according to any one of claims 1 to 4 , further comprising a lever member capable of moving the release member toward the axial engine side. The release member has a drive member,
Said drive member, said has an annular portion which is supported by the first pressure plate, and a plurality of axially extending portion extending through the friction coupling member extending axially toward the transmission from said annular portion, according to claim 6 Clutch device. The clutch device according to claim 5 or 7 , wherein the drive member further includes an annular contact portion that is fixed to a distal end of the axially extending portion and contacts the lever member. The clutch device according to claim 8 , wherein the annular contact portion is detachable in the axial direction from the axially extending portion.

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