JP6322619B2 - Clutch device - Google Patents

Description

  The present invention relates to a clutch device for transmitting a driving force from a driving source such as an engine to a transmission.

  Generally, in a vehicle equipped with a manual transmission (manual transmission), a dry friction clutch is provided between a drive source (engine) and the transmission. A dry friction clutch is generally constituted by a clutch cover and a clutch disk. The clutch cover includes a pressure plate that can move along the axial direction of the input shaft, and a diaphragm spring that applies a load to the pressure plate along the axial direction, and is fixed to the flywheel.

  A clutch disk is disposed between the flywheel and the pressure plate. The clutch disk is engaged with a spline provided on the outer periphery of the input shaft connected to the transmission, and is movable along the axial direction of the shaft. A facing portion provided with a friction material is disposed on the outer peripheral side of the clutch disk.

  In a transmission that uses a clutch that presses the pressure plate with a diaphragm spring and transmits the torque with a clutch disc, a clutch with specifications that satisfy the required clutch capacity for the operating conditions is set. The generated value becomes high. If the torque generation value is high, it is necessary to ensure the strength of each component, resulting in a problem that the size of the transmission connected to the clutch becomes large and heavy. For this reason, in order to reduce the size of the transmission, it is necessary to reduce the torque generated during the slip.

JP 2005-308121 A

  The present invention has been made in view of the above points, and an object of the present invention is to provide a clutch device capable of reducing the torque generated at the time of sliding.

  In order to solve the above problems, the clutch device (1) according to the present invention, which transmits the driving force from the drive source (E) by frictional engagement with the rotating member (50) of the drive source (E), A clutch disk (10) having a frictional engagement portion (11) that comes into contact with the member (50) and spline-engaging with the output shaft (60), and a pressing member for pressing the clutch disk (10) against the rotating member (50) ( 21), and the clutch disk (10) is configured such that the frictional engagement portion (11) is movable in the radial direction.

  Thus, if the frictional engagement portion (11) of the clutch disk (10) is configured to be movable in the radial direction, the frictional engagement portion (11) can be obtained by moving the frictional engagement portion (11) in the radial direction. The effective diameter can be reduced. For this reason, the generated torque at the time of slip can be reduced, and the enlargement of the transmission connected to the clutch device (1) can be suppressed.

  In the clutch device (1), when the rotational speed of the output shaft (60) is increased, the effective diameter of the frictional engagement portion (11) is reduced and the rotational speed of the output shaft (60) is reduced. It is good also as a structure comprised so that the effective diameter of a friction fastening part (11) may become large when becomes low.

  As described above, if the effective diameter of the frictional engagement portion (11) is reduced as the rotational speed of the output shaft (60) is increased, the frictional engagement portion is obtained when the output shaft (60) rotates at a high speed. Since the effective diameter of (11) is reduced, the clutch transmission capacity is also reduced. On the other hand, when the output shaft (60) rotates at a low speed as in the start operation of the vehicle, the effective diameter of the frictional engagement portion (11) increases and the clutch transmission capacity increases. Can be secured.

  In the clutch device (1), the clutch disk (10) includes a disk body (12) that supports the frictional engagement part (11) so as to be movable in the radial direction, a frictional engagement part (11), and a mass body (13). ) Are connected to both ends, and are connected to the connecting member (14) supported on the surface of the disk body (12) so as to be swingable about the supporting shaft (14a), and the supporting shaft (14a) of the connecting member (14). An elastic member (15) wound around and urging the mass body (13) in a predetermined direction, and when the rotational speed of the output shaft (60) increases, the mass body (13) is moved in the outer diameter direction by centrifugal force. When the connecting member (14) swings to move the friction fastening portion (11) in the inner diameter direction and the rotational speed of the output shaft (60) decreases, the connecting member (14) is connected by the elastic force of the elastic member (15). The member (14) swings to move the friction fastening part (11) in the outer diameter direction. Rukoto may be characterized.

As described above, when the connecting member (14) that connects the friction fastening portion (11) and the mass body (13) to both ends is supported so as to be swingable with respect to the disc body (12), the output shaft (60). When the number of rotations increases, the mass body (13) moves in the outer diameter direction by centrifugal force. When the mass body (13) at one end of the connecting member (14) moves in the outer diameter direction, the friction fastening portion (11) at the other end of the connecting member (14) is moved to the inner diameter side. Thus, when the output shaft (60) rotates at a high speed, the friction fastening portion (11) moves in the inner diameter direction. On the other hand, when the rotation speed of the output shaft (60) is lowered, the centrifugal force of the mass body (13) is weakened, and the elastic force of the elastic member (15) is relatively strong. Then, the frictional fastening portion (11) at the other end of the connecting member (14) is moved to the outer diameter side to return to the original position. Thus, when the output shaft (60) rotates at a low speed, the frictional engagement portion (11) returns to the outer diameter direction. With such a configuration, since the frictional engagement portion (11) naturally moves according to the rotation speed of the output shaft (60), a special control member is used to change the effective diameter of the frictional engagement portion (11). There is no need to attach.
In addition, the code | symbol in said parenthesis has shown the code | symbol of the corresponding component of embodiment mentioned later as an example of this invention.

  According to the clutch device of the present invention, it is possible to reduce the torque generated at the time of sliding.

It is the schematic which shows the whole structure of a clutch apparatus. It is a perspective view at the time of low rotation of a clutch apparatus. It is a front view at the time of low rotation of a clutch apparatus. It is a front view at the time of high rotation of a clutch apparatus.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, the overall structure of the clutch device 1 will be described. FIG. 1 is a schematic diagram showing the overall configuration of the clutch device 1. The clutch device 1 of this embodiment is configured to frictionally fasten to a flywheel 50 (rotating member) disposed on a drive source E side such as an engine. The clutch device 1 includes a clutch disk 10 disposed adjacent to the flywheel 50 of the drive source E, and a clutch cover 20 disposed so as to cover the periphery of the clutch disk 10. Next, each member will be described in detail.

  The clutch disk 10 is spline-engaged with the output shaft 60 at the center of rotation. Therefore, the clutch disk 10 is configured to be slidable in the axial direction with respect to the output shaft 60 and not to be rotatable relative to the output shaft 60. With this configuration, the clutch disk 10 transmits the driving force transmitted from the flywheel 50 to the output shaft 60.

  As shown in FIG. 1, the clutch disk 10 includes a friction fastening portion 11 called a facing in which a friction material is fixedly disposed on both surfaces, and a disk body 12 that supports the friction fastening portion 11 so as to be movable in the radial direction. On the surface of the disc body 12 on the transmission (not shown) side, the mass body 13, the friction fastening portion 11, and the connecting member 14 that connects the mass body 13 are provided.

  The clutch cover 20 includes a pressure plate 21 (pressing member) for pressing the clutch disk 10 against the flywheel 50. The pressure plate 21 has an annular protrusion 21a, and a diaphragm spring 22 is attached to the clutch cover 20 so as to be in pressure contact with the annular protrusion 21a. That is, in the steady state, the diaphragm spring 22 is biased so that the vicinity of the outer peripheral side presses the annular protrusion 21 a of the pressure plate 21.

  On the inner diameter side of the diaphragm spring 22, a release guide 31 that is integrally formed with a clutch housing (not shown) and is fixedly disposed around the output shaft 60, and is slidably attached to the release guide 31. A release bearing 32 is disposed. The release bearing 32 moves in the axial direction by operating a release fork 33 that moves the release bearing 32 in the axial direction. The release fork 33 is finally connected to the clutch pedal CP. Although the operation of the release fork 33 by the clutch pedal CP includes an operation method such as a hydraulic method and a mechanical method, any method may be used.

  With this configuration, when the release fork 33 rotates in conjunction with the depression of the clutch pedal CP and the release bearing 32 is moved in the right direction in FIG. 1, the inner diameter side end of the diaphragm spring 22 is also moved in the right direction. It will be. Then, the urging force of the diaphragm spring 22 against the annular protrusion 21a is released, and the pressure plate 21 moves to the left.

  As a result, the urging force of the pressure plate 21 against the frictional engagement portion 11 is released, and the clutch is released. Then, the drive transmission from the flywheel 50 of the drive source E to the output shaft 60 via the frictional engagement portion 11 is cut off.

  In the present embodiment, a push-type clutch is illustrated in which the release bearing 32 releases the clutch when the end of the pressure plate 21 is pressed. However, the present invention is not limited to this. That is, the release bearing 32 may be a pull-type clutch in which the clutch is released when the end of the pressure plate 21 is pulled.

  Next, a detailed structure of the clutch disk 10 which is a characteristic configuration of the present embodiment will be described. FIG. 2 is a perspective view of the clutch device 1 during low rotation. FIG. 3 is a front view of the clutch device 1 during low rotation. In addition, the cross section of the clutch disk 10 in FIG. 1 is an AA cross section in FIG.

  As shown in FIGS. 2 and 3, the clutch disk 10 includes a friction fastening portion 11, a disc body 12, a mass body 13 that is a weight, and a connecting member that connects the friction fastening portion 11 and the mass body 13 to both ends. 14 and an elastic member 15 made of a coil spring that urges the connecting member 14 in a predetermined direction. 2 and 3, since the back surface of each member has the same configuration as the front surface, only the front surface side is shown and described. Next, each member will be described in detail.

  The friction fastening portion 11 is configured by arranging a friction material on the front and back surfaces at a position between the pressure plate 21 and the flywheel 50. The friction fastening portion 11 is composed of six members having the same configuration, and is connected to the disc body 12 so as to be slidable in the radial direction. The three members are evenly arranged on the front surface side of the disc main body 12 so as to be shifted every 120 degrees in the circumferential direction, and the remaining three members are evenly shifted on the back surface side of the disc main body 12 every 120 degrees in the circumferential direction. Arranged. Since the plurality of friction fastening portions 11 have the same configuration, only one friction fastening portion 11 will be described with reference numerals. In the present embodiment, the number of frictional engagement portions 11 is six, but the number of members may not be six.

  The frictional fastening portion 11 is fixed to the outer peripheral side end portion of the sliding plate 16 so as to be slidably attached to the disc body 12 in the radial direction. The sliding plate 16 is formed with two sliding holes, a first guide 16a and a second guide 16b, parallel to the radial direction.

  On the first guide 16a side, a plurality of rivets for penetrating from the front surface to the back surface and holding the members are disposed, and are composed of an outer diameter side first rivet 17a and an inner diameter side support shaft 14a. Further, on the second guide 16b side, a second rivet 17b on the outer diameter side and a third rivet 17c on the inner diameter side are arranged. The third rivet 17c is a shaft that supports the back side of the support shaft 14a.

  Further, the sliding plate 16 is provided with a through hole 16c through which the moving shaft 14b provided at the end opposite to the end where the mass body 13 is provided in the connecting member 14 is passed. The The moving shaft 14b moves while being guided by a rotation guide 12a formed on the disc body 12 so as to have the same radius with the support shaft 14a as a center.

  The connecting member 14 attaches the mass body 13 to one end, and attaches the moving shaft 14b to the other end. The moving shaft 14b is guided by the rotation guide 12a and rotates about the support shaft 14a. Since the moving shaft 14b is connected to the friction fastening portion 11 via the sliding plate 16, the connecting member 14 swings around the support shaft 14a, so that the friction fastening portion 11 is moved to the second position of the sliding plate 16. It can be moved in the radial direction along the one guide 16a and the second guide 16b. As described above, the mass member 13 is disposed at one end of the connecting member 14, and the friction fastening portion 11 is disposed at the other end via the sliding plate 16. For this reason, when the connecting member 14 swings around the support shaft 14a, the mass body 13 and the friction fastening portion 11 are interlocked.

  The elastic member 15 is composed of a coil spring, and is wound around the support shaft 14 a on the front side of the disk main body 12. Then, both ends are fixed between the moving shaft 14b and the first rivet 17a. For this reason, the moving shaft 14b is biased toward the first rivet 17a around the support shaft 14a. When the moving shaft 14b approaches the first rivet 17a, the mass body 13 is urged in a direction away from the first rivet 17a because the mass body 13 is present at the opposite end of the connecting member 14 to the moving shaft 14b. Will be. Since the mass body 13 is closer to the inner diameter side than the first rivet 17a, the elastic body 15 causes the mass body 13 to be constantly urged so as to move toward the inner diameter side around the support shaft 14a. Yes.

  It will be described with reference to FIGS. 3 and 4 that the effective diameter of the frictional engagement portion 11 changes during the operation of the clutch disk 10 with the above configuration. FIG. 3 is a front view of the clutch device 1 during low rotation as described above. FIG. 4 is a front view of the clutch device 1 when it rotates at a high speed.

  When the rotational speed of the output shaft 60 is low, the frictional engagement portion 11 is moved in the outer diameter direction as shown in FIG. In FIG. 3, the support shaft 14a is in contact with the lower end portion of the first guide 16a in the drawing, and the third rivet 17c is in contact with the lower end portion of the second guide 16b in the drawing. In this case, the effective diameter of the frictional engagement portion 11 is the maximum effective diameter Rb.

  A specific operation when the output shaft 60 rotates at low speed will be described. First, due to the elastic force of the elastic member 15, the connecting member 14 is urged clockwise in the drawing around the support shaft 14a, and the moving shaft 14b of the connecting member 14 moves in the outer diameter direction. Then, the through hole 16c of the sliding plate 16 in contact with the moving shaft 14b also moves in the outer diameter direction. At this time, the frictional fastening portion 11 fixed to the outer peripheral end portion of the sliding plate 16 in which the through hole 16c is formed moves in the outer diameter direction.

  When the rotation speed of the output shaft 60 is high, as shown in FIG. 4, the frictional engagement portion 11 is moved in the inner diameter direction. In FIG. 4, the moving shaft 14b is in contact with the upper end of the first guide 16a in the drawing, and the second rivet 17b is in contact with the upper end of the second guide 16b in the drawing. In this case, the effective diameter of the frictional engagement portion 11 is the minimum effective diameter Rs.

  A specific operation when the output shaft 60 rotates at high speed will be described. First, due to the centrifugal force acting on the mass body 13, the connecting member 14 swings counterclockwise in the figure indicated by an arrow about the support shaft 14 a against the elastic force of the elastic member 15. Then, the moving shaft 14b of the connecting member 14 moves in the inner diameter direction, and the through hole 16c of the sliding plate 16 in contact with the moving shaft 14b also moves in the inner diameter direction. At this time, the friction fastening portion 11 fixed to the outer peripheral end portion of the sliding plate 16 in which the through hole 16c is formed moves in the inner diameter direction.

  As described above, in the clutch device 1 according to the present embodiment, the frictional engagement portion 11 of the clutch disk 10 is configured to be movable in the radial direction. The effective diameter of the part 11 can be reduced. For this reason, the torque generated at the time of sliding can be reduced, and the enlargement of the transmission connected to the clutch device 1 can be suppressed.

  Further, if the clutch device 1 is configured such that the effective diameter of the frictional engagement portion 11 becomes smaller as the rotational speed of the output shaft 60 becomes higher, when the output shaft 60 rotates at a high speed, the frictional engagement portion 11 As the effective diameter decreases, the clutch transmission capacity also decreases. On the other hand, when the output shaft 60 rotates at a low speed as in the start operation of the vehicle, the effective diameter of the frictional engagement portion 11 is increased and the clutch transmission capacity is increased, so that the necessary clutch transmission capacity is ensured. Can do.

  Further, in the clutch device 1, a coupling member 14 that couples the frictional engagement portion 11 and the mass body 13 to both ends is supported so as to be swingable with respect to the disc body 12. Thereby, when the rotation speed of the output shaft 60 becomes high, the mass body 13 moves in the outer diameter direction by centrifugal force. When the mass body 13 at one end of the connecting member 14 moves in the outer diameter direction, the friction fastening portion 11 at the other end of the connecting member 14 is moved toward the inner diameter side. Thus, when the output shaft 60 rotates at a high speed, the frictional engagement portion 11 moves in the inner diameter direction.

  On the other hand, when the rotation speed of the output shaft 60 is lowered, the centrifugal force of the mass body 13 is weakened, and the elastic force of the elastic member 15 is relatively strong. Then, the frictional fastening portion 11 at the other end of the connecting member 14 is moved to the outer diameter side so as to return to the original position. Thus, when the output shaft 60 rotates at a low speed, the frictional engagement portion 11 returns to the outer diameter direction.

  With such a configuration, the frictional engagement portion 11 naturally moves in accordance with the rotational speed of the output shaft 60, so that it is not necessary to attach a special control member to change the effective diameter of the frictional engagement portion 11.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical idea described in the claims and the specification and drawings. Deformation is possible.

DESCRIPTION OF SYMBOLS 1 ... Clutch apparatus 10 ... Clutch disc 11 ... Friction fastening part 12 ... Disc main body 12a ... Turning guide 13 ... Mass body 14 ... Connecting member 14a ... Supporting shaft 14b ... Moving shaft 15 ... Elastic member 16 ... Sliding plate 16a ... First One guide 16b ... second guide 16c ... through hole 17a ... first rivet 17b ... second rivet 17c ... third rivet 20 ... clutch cover 21 ... pressure plate 22 ... diaphragm spring 31 ... release guide 32 ... release bearing 33 ... release fork 50 ... Flywheel 60 ... Output shaft CP ... Clutch pedal E ... Drive source

Claims (2)

In the clutch device that transmits the driving force from the driving source by friction fastening to the rotating member of the driving source,
A clutch disk that includes a frictional engagement portion that contacts the rotating member and is splined to the output shaft;
A clutch cover including a pressing member that presses the clutch disk against the rotating member;
The clutch disc is configured such that the frictional engagement portion is movable in a radial direction ,
The friction engagement portion is configured such that the effective diameter decreases when the rotation speed of the output shaft increases, and the effective diameter increases when the rotation speed of the output shaft decreases. Clutch device. The clutch disc is
A disc main body that supports the friction fastening portion in a radially movable manner;
A connecting member that connects the friction fastening portion and the mass body to both ends and is supported so as to be swingable around a support shaft on the surface of the disc body;
An elastic member wound around the support shaft of the connecting member and biasing the mass body in a predetermined direction;
Have
When the rotation speed of the output shaft increases, the mass body moves in the outer diameter direction by centrifugal force, the connecting member swings and moves the friction fastening portion in the inner diameter direction,
When the rotational speed of the output shaft is lowered by the elastic force of the elastic member, a clutch device according to claim 1, wherein the connecting member and wherein the moving the friction engagement unit swings radially outwardly .

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