JP2005180650A - Clutch disc assembly - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simplify a structure by dispensing with restriction in the axial direction of a friction disc. <P>SOLUTION: This clutch disc assembly comprises the carbon friction disc 2, a clutch disc main body 3 and a plurality of rivets 4. The friction disc is pressed to a fly wheel. The clutch disc main body has a clutch plate 8 connected with an inner peripheral part of the friction disc at its outer periphery, and a spline hub 7 connected with an input shaft of a transmission. The rivets directly connect an outer peripheral part of the clutch plate with the inner peripheral part of the friction disc. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a clutch disk assembly, and more particularly to a clutch disk assembly reinforced for high loads.

  In general, a clutch disk assembly used in a racing automobile or the like can withstand a high load and is required to have durability, so vibration absorption and quietness are often sacrificed. As such a clutch disk assembly, for example, there is a clutch disk assembly disclosed in Japanese Patent Laid-Open No. 10-141387. The clutch disk assembly includes a first cylindrical portion fixed to the flywheel, a hub flange having a second cylindrical portion disposed on the inner peripheral side of the first cylindrical portion and connected to the shaft, A drive plate and a driven plate as friction disks respectively engaged with the first cylindrical portion and the second cylindrical portion, and a pressing mechanism for pressing or releasing the both plates to the flywheel side are provided. The pressing mechanism includes a clutch cover, a pressure plate, a diaphragm spring for urging the clutch cover, and the like. The pressing mechanism is fixed to the first cylindrical portion and disposed on the side opposite to the flywheel side of the drive plate and the driven plate. .

Also, this type of clutch disk assembly has also been proposed in which a damper portion is provided in order to absorb and mitigate vibrations (for example, JP-A-2002-195290). Here, a damper spring is disposed between the input side member and the output side member to elastically connect these members in the circumferential direction.
Japanese Patent Laid-Open No. 10-141387 JP 2002-195290 A

  In the clutch disk assembly of the type described above, the friction disk and the output side member are coupled by meshing of the gears, and the friction disk can move in the axial direction. For this reason, a mechanism for restricting the axial movement of the friction disk is required, and the structure becomes complicated.

  Further, in the clutch disk assembly without the damper portion, the engine rotational fluctuation is transmitted to the transmission as it is, and a rattling sound is generated. Further, as described above, since the friction disk and the output side member are coupled by the meshing of the gears, rattling noise is also generated at this portion. The type provided with the damper portion can suppress these rattling noises but is not sufficient.

  It is an object of the present invention to simplify the structure by eliminating the need for axial regulation of the friction disk. Another problem is to eliminate the engagement between the friction disk and the output-side member and eliminate the rattling noise.

  A clutch disk assembly according to claim 1 is for transmitting and shutting off power from an engine-side flywheel to an input shaft of a transmission, comprising a carbon friction disk, a clutch disk body, and a plurality of fixed parts. With tools. The carbon friction disc is pressed against the flywheel. The clutch disk main body has a disk-shaped input part connected to the outer periphery of the inner periphery of the friction disk and an output part connected to the input shaft of the transmission. The plurality of fixtures directly connect the outer peripheral portion of the disc-shaped input portion and the inner peripheral portion of the friction disk.

  Here, the engine-side power is transmitted to the transmission via the carbon friction disc and the clutch disc body. At this time, since the carbon friction disk and the disc-shaped input portion of the clutch disk main body are directly connected by the fixture, it is not necessary to restrict the axial movement of the friction disk, and the structure is simplified. . Further, since the connection by the meshing of the gears is not used, the rattling noise in the connecting portion between the friction disk and the clutch disk body in the conventional apparatus is eliminated.

  A clutch disk assembly according to a second aspect is the clutch disk assembly according to the first aspect, wherein the friction disk has a notch into which a fixture is inserted. And the fixing tool has a collar part, a trunk | drum, and a fixing | fixed part. The collar portion abuts on the side surface of the friction disk and restricts the axial movement of the friction disk. The body portion is inserted into the notch of the friction disk, has a thickness corresponding to the thickness of the friction disk, and a part of the end surface comes into contact with the side surface of the disk-shaped input portion. The fixing portion is formed at an end portion on the opposite side of the collar portion, and is fixed to the disc-like input portion.

  A clutch disk assembly according to a third aspect is the clutch disk assembly according to the second aspect, wherein the body portion has an axial length equal to or greater than a thickness of the friction disk.

  Here, since the fixture has the body portion, the coupling relationship between the friction disk and the clutch disk body can be adjusted by controlling the length of the body portion. That is, by making the length of the body of the fixture equal to the thickness of the friction disk, the friction disk and the clutch disk main body are completely fixed so that they cannot move with respect to each other. By making it longer than the thickness, the fixation of both is fixed with a degree of freedom in the axial direction.

  The clutch disk assembly according to claim 4 is the clutch disk assembly according to claim 2 or 3, wherein the notches of the friction disk have a pair of side surfaces extending in the radial direction and parallel to each other, and Has a pair of flat surfaces that can abut against a pair of side surfaces.

  Here, the notch of the friction disk and the body of the fixture are in surface contact instead of point contact, so the surface pressure is reduced and wear can be suppressed.

  A clutch disk assembly according to a fifth aspect is the clutch disk assembly according to the fourth aspect, wherein a pair of flat surfaces formed on the body of the fixture and a pair of side surfaces of the notches of the friction disk are provided. There is a gap between them.

  Here, since a plurality of fixtures are provided, it is difficult to accurately manage the dimensions of all the fixtures and notches. Therefore, a gap is provided between each fixture and the notch to facilitate manufacture and assembly.

  A clutch disk assembly according to claim 6 is the clutch disk assembly according to any one of claims 1 to 5, wherein the clutch disk body includes a hub as an output portion and a disk shape as a disk-shaped input portion. And an input plate. The hub has a boss coupled to the input shaft of the transmission and a flange portion extending in the radial direction from the boss. The disc-shaped input plate is provided on the side of the flange portion of the hub.

  A clutch disk assembly according to a seventh aspect is the clutch disk assembly according to the sixth aspect, wherein the disk-like plate is disposed so as to be relatively rotatable with respect to the flange portion of the hub within a predetermined angular range. It further includes a damper portion that elastically connects the disc-shaped input plate and the flange portion of the hub in the circumferential direction.

  In this case, vibrations caused by rotational fluctuations are suppressed by the damper portion, and rattling noise in the transmission can be suppressed.

  The clutch disk assembly according to an eighth aspect is the clutch disk assembly according to any one of the first to seventh aspects, wherein the fixing tool is a rivet and the fixing portion is fixed by caulking.

  In the present invention as described above, the axial restriction of the friction disk is not necessary, and the structure is simplified. Further, rattling noise can be suppressed.

  1 and 2 show a clutch disk assembly 1 in which an embodiment of the present invention is adopted. The clutch disk assembly 1 is used in a clutch device of an automobile, particularly an automobile clutch device that requires a high transmission torque compared to the clutch size, and is transmitted from an engine-side flywheel (not shown). This is a device for transmitting torque to a side input shaft (not shown). In FIG. 1, OO is the rotation axis of the clutch disk assembly 1.

  The clutch disk assembly 1 is composed of a carbon friction disk 2 pressed against a flywheel on the engine side, a clutch disk body 3 to which the friction disk 2 is fixed, and the friction disk 2 and the clutch disk body 3 connected to each other. And rivets 4 to be used.

  The carbon friction disk 2 is formed in an annular shape. A plurality of notches 5 are formed on the inner peripheral edge of the friction disk 2 at predetermined equal intervals in the circumferential direction. As shown in FIG. 3, the notch 5 is formed with a predetermined depth and a predetermined width from the inner peripheral edge toward the outer peripheral side, and the pair of side surfaces 5 a and 5 b are formed with respect to the radiation P. They are parallel to each other.

  The clutch disk main body 3 includes a spline hub 7 connected to the input shaft, a clutch plate 8 and a retaining plate 9, and a damper portion 10.

  The spline hub 7 has a boss 71 at the center thereof and a disk-like flange portion 72 extending from the boss 71 in the radial direction. At the center of the boss 71, a spline hole 71a is formed that meshes with spline teeth (not shown) of the input shaft. As shown in FIG. 2, the flange portion 72 has stop pin notches 72a formed at four positions at predetermined intervals on the outer peripheral portion, and six pieces on the substantially same circumference as these notches 72a. A window hole 72b is formed.

  The clutch plate 8 and the retaining plate 9 are substantially disk-shaped plates, and are disposed on both sides of the flange portion 72 of the spline hub 2 so as to face each other with the flange portion 72 interposed therebetween. In addition, six windows 8a and 9a are formed in the plates 8 and 9 at positions corresponding to the window holes 72b formed in the flange 72 of the spline hub 7, respectively. Furthermore, a plurality of holes 8b for inserting rivets are formed on the circumference of the clutch plate 8 at predetermined intervals on the circumference. These two plates 8 and 9 are fitted to the boss 71 of the spline hub 7 so as to be rotatable relative to each other at the inner periphery.

  The retaining plate 8 and the clutch plate 9 are integrally connected by a stop pin 11 at the outer peripheral portion thereof. The stop pin 11 retains the axial length between the clutch plate 8 and the retaining plate 9 and is brought into contact with the stop pin notch 72a of the flange portion 72 from the circumferential direction so that the clutch plate 8 and The relative rotation angle between the retaining plate 9 and the flange portion 72 is restricted.

  Note that friction washers 12a and 12b are provided between the flange portion 72 of the spline hub 7 and the clutch plate 8 and the retaining plate 9, respectively. When these friction washers 12a and 12b are sandwiched between both members, a hysteresis torque is generated.

  The damper portion 10 elastically connects the clutch plate 8 and the retaining plate 9 to the spline hub 7 in the circumferential direction, and is housed in a window hole 72 b formed in the flange portion 72 of the spline hub 7. A torsion spring 14 is provided. The torsion spring 14 is supported by the windows 8 a and 9 a of the clutch plate 8 and the retaining plate 9.

  Next, the rivet 4 will be described. The rivet 4 is inserted into the notch 5 of the friction disk 2 and the hole 8 b of the clutch plate 8, and directly connects the friction disk 2 to the outer periphery of the clutch plate 8.

  3 and 4 show the rivets after assembly, and FIG. 5 shows the rivets before assembly (before caulking). As shown in these drawings, the rivet 4 has a collar portion 41, a trunk portion 42, and a fixing portion 43.

  The collar portion 41 has a larger diameter than the other portions, and the surface on the body portion 42 abuts against the side surface of the friction disk 2. The flange 41 protrudes toward the flywheel from the friction surface of the friction disk 2, but is arranged so as to be located further on the inner peripheral side than the inner peripheral end of the flywheel.

  The body portion 42 is formed by forming a pair of opposed flat surfaces 42 a and 42 b in a part of a portion formed continuously with the same diameter as the collar portion 41, and is formed in the notch 5 of the friction disk 2. Inserted. The width of the body portion 42 (the length between the pair of flat surfaces 42 a and 42 b) is set narrower than the width of the notch 5 of the friction disk 2, and a predetermined gap is formed in the notch 5. Has been inserted. Further, the length of the body portion 42 may be set substantially equal to the thickness of the friction disk 2 or may be set longer than the thickness of the friction disk 2. When the length of the body portion 42 is set substantially equal to the thickness of the friction disk 2, the friction disk 2 is completely fixed so as not to move with respect to the clutch plate 8, and is longer than the thickness of the friction disk 2. When set, the fixation of both is fixed with freedom in the axial direction. In this case, the friction disk 2 is made of carbon, the rivet 4 and the clutch plate 8 are each formed of an iron-based material, and the coefficients of thermal expansion are different from each other. It is effective in such cases.

  The fixing portion 43 is formed to have a smaller diameter than the body portion 42 and is inserted into the hole 8 b of the clutch plate 8. Then, by caulking the end portion of the fixing portion 43, the friction disk 2 and the clutch plate 8 are fixed to each other, and the movement of the friction disk 2 in the axial direction is restricted.

  Next, the operation will be described.

  When the pressure plate (not shown) of the clutch cover assembly 1 presses the friction disk 2 toward the flywheel by the clutch operation, the friction disk 2 is pressed against the flywheel, and the torque of the flywheel is input to the friction disk 2. The Torque is output from the friction disk 2 to the main drive shaft 32 via the clutch plate 8 (retaining plate 9), the torsion spring 14 and the spline hub 7.

  The clutch disk assembly 1 transmits torque and reduces torsional vibration. When the torsional vibration is transmitted to the clutch plate 8 and the retaining plate 9, the torsion spring 14 repeatedly expands and contracts, and both the plates 8 and 9 repeat relative rotation with respect to the spline hub 7. At this time, a hysteresis torque is generated at the sliding portion between the friction washers 12a and 12b and the flange portion 72, and the torsional vibration is attenuated.

  In the embodiment as described above, since the carbon friction disk 2 and the clutch plate 8 are directly connected by the rivet 4, it is not necessary to restrict the axial movement of the friction disk 2 and the structure is simplified. . Further, by controlling the length of the body portion 42 of the rivet 4, the friction disk 2 and the clutch disk main body 3 may be completely fixed so that they cannot move with each other, or fixed with a degree of freedom in the axial direction. it can. Furthermore, since the friction disk 2 and the rivet 4 are in surface contact, wear of both can be suppressed. In addition, since a gap is secured between the notch 5 of the friction disk 2 and the rivet 4, manufacture and assembly are facilitated.

1 is a longitudinal sectional view of a clutch disk assembly according to an embodiment of the present invention. FIG. 3 is a partial front view of the clutch disk assembly. The figure which shows the coupling | bond part of a friction disc and a clutch plate. The perspective view of the rivet after crimping. The perspective view of the rivet single body before crimping.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Clutch disc assembly 2 Friction disc 3 Clutch disc main body 4 Rivet 41 Brim part 42 Body part 43 Fixing part 5 Notch 5a, 5b Notch side surface 7 Spline hub 71 Boss 72 Flange part 8 Clutch plate 9 Retaining plate 10 Damper part

Claims (8)

A clutch disk assembly for transmitting and shutting off power from an engine-side flywheel to an input shaft of a transmission,
A carbon friction disc pressed against the flywheel;
A clutch disk main body having a disk-like input part connected to the outer periphery of the inner periphery of the friction disk, and an output part connected to the input shaft of the transmission;
A plurality of fixtures that directly connect the outer peripheral portion of the disc-shaped input portion and the inner peripheral portion of the friction disk;
A clutch disk assembly comprising: The friction disc has a notch into which the fixture is inserted;
The fixture is
A flange portion that abuts against a side surface of the friction disk to restrict axial movement of the friction disk;
A body that is inserted into the notch of the friction disk, has a thickness corresponding to the thickness of the friction disk, and a part of the end surface abuts against a side surface of the disk-shaped input portion;
A fixed portion formed at the opposite end of the collar portion and fixed to the disc-shaped input portion;
have,
The clutch disk assembly according to claim 1.   The clutch disk assembly according to claim 2, wherein the body portion has an axial length equal to or greater than a thickness of the friction disk. The notch of the friction disk has a pair of parallel side surfaces extending in the radial direction,
The body portion of the fixture has a pair of flat surfaces that can come into contact with the pair of side surfaces.
The clutch disk assembly according to claim 2 or 3.   The clutch disk assembly according to claim 4, wherein a gap is secured between a pair of flat surfaces formed on a body portion of the fixture and a pair of side surfaces of the notches of the friction disk. . The clutch disc body is
A hub as the output part, including a boss coupled to the input shaft of the transmission, and a flange part extending in a radial direction from the boss;
A disc-shaped input plate as the disc-shaped input portion provided on the side of the flange portion of the hub;
The clutch disk assembly according to claim 1, comprising: The disk-shaped plate is disposed so as to be rotatable relative to the flange portion of the hub within a predetermined angle range,
The clutch disc body further includes a damper portion that elastically connects the disc-shaped input plate and the flange portion of the hub in a circumferential direction.
The clutch disk assembly according to claim 6.   The clutch disk assembly according to any one of claims 1 to 7, wherein the fixing member is a rivet, and the fixing portion is fixed by caulking.

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