JP6558142B2 - Clutch device - Google Patents

Description

  The present invention relates to a clutch device, and more particularly to a wet multi-plate clutch device that connects and disconnects power transmission from an engine to a transmission.

  Conventionally, a wet multi-plate clutch device that connects and disconnects power transmission from an engine to a transmission is known. A general wet multi-plate clutch device includes a clutch hub that rotates integrally with an input shaft, a clutch drum that rotates integrally with an output shaft, a plurality of clutch plates respectively provided on the clutch hub and the clutch drum, and hydraulic pressure. And a return spring for releasing the pressure contact of each clutch plate (clutch disengagement) by separating the piston from the clutch plate.

  In this clutch device, a temperature rise caused by friction between the clutch plates is suppressed by oil lubrication. In order to lubricate oil efficiently, two clutch plates are overlapped and an oil passage is formed on the overlapping surface. For example, a flat oil flow path extending in the radial direction or an oil flow path having a rectangular cross section bent in the circumferential direction and the radial direction formed on the overlapping surface (see Patent Document 1), between two plates An arrangement in which a cushion plate deformable in the axial direction is arranged (see Patent Document 2), and an arrangement in which a corrugated plate deformable in the axial direction is arranged between two plates (see Patent Document 3) is known. Yes.

JP-A-3-239819 JP-A-4-102723 Japanese Patent No. 3106713

  When the plates are overlapped, there is a possibility that the thickness of each plate in the plate is reduced. When the thickness of the plate is reduced, the spline teeth fitted in the spline grooves are also reduced. If the spline teeth become thin, the operating characteristics of the clutch device may be impaired due to bending or the like.

  It is an object of the disclosed device to improve the operating characteristics of a clutch device.

The disclosed device is a clutch device that is provided between an input shaft and an output shaft arranged on the same axis and transmits the rotation of the input shaft to the output shaft, and is a clutch that is rotated integrally with the input shaft. A hub, a clutch drum that rotates integrally with the output shaft, a first plate member that is spline-fitted to the clutch hub, a second plate member that is spline-fitted to the clutch drum, and an axial stroke A piston capable of moving and pressure-contacting the first plate member and the second plate member with each other, wherein at least one of the first plate member and the second plate member is disposed opposite to each other and is formed in the spline groove; Between a plurality of plates formed with a plurality of plate-like protrusions to be fitted and the plate-like protrusions facing each other Comprises a spacer which is bonded to each of said plate-like projections.

  According to the disclosed device, the operating characteristics of the clutch device can be improved.

In the clutch device concerning this embodiment, it is a typical longitudinal section showing the upper half of the state where the 1st wet multi-disc clutch was connected. In the clutch device concerning this embodiment, it is a typical longitudinal section showing the important section in the state where the 2nd wet multi-disc clutch was connected. (A) is the whole figure explaining the 1st separate plate. (B) is the elements on larger scale explaining typically the spline teeth formed in the inner peripheral part. It is the elements on larger scale explaining typically the mode of the movement to the axial direction of a 1st separate plate. (A) is a general view illustrating a second separate plate. (B) is the elements on larger scale explaining typically the spline teeth formed in the outer peripheral part. It is the elements on larger scale explaining typically the mode of the movement to the axial direction of a 2nd separate plate.

  Hereinafter, based on an accompanying drawing, a clutch device concerning one embodiment of the present invention is explained. The same parts are denoted by the same reference numerals, and their names and functions are also the same. Therefore, detailed description thereof will not be repeated.

  As shown in FIG. 1, the clutch device 10 of this embodiment is a dual clutch device including a first wet multi-plate clutch C1 and a second wet multi-plate clutch C2. The clutch device 10 is provided between the input shaft 11, the first output shaft 12A, and the second output shaft 12B, and selectively transmits the driving force of the engine E to the first output shaft 12A and the second output shaft 12B. ing. In the present embodiment, the second output shaft 12B is rotatably inserted into the hollow shaft of the first output shaft 12A. The input shaft 11, the first output shaft 12A, and the second output shaft 12B rotate on the same axis. The driving forces of the first output shaft 12A and the second output shaft 12B are transmitted to the transmission T, and rotate the odd-numbered transmission gear group and the even-numbered transmission gear group, respectively.

  The first wet multi-plate clutch C1 includes a first clutch hub 13, a first separate plate 14A, a first clutch drum 15, a first friction plate 14B, a pressure contact plate 16, a first piston 17, and a cover member. 18.

  The first clutch hub 13 is a cylindrical member that rotates integrally with the input shaft 11, and a groove (on the outer peripheral surface) that is parallel to the axial direction of each shaft 11, 12 </ b> A, 12 </ b> B (hereinafter simply referred to as the axial direction). Spline groove) GR1 is formed. The first separate plate 14A is an example of the first plate member according to the present invention, and is attached to the outer peripheral surface of the first clutch hub 13 so as to be splined and movable in the axial direction. A plurality of the first separate plates 14A are attached in the axial direction. The first separate plate 14A will be described in detail later.

  The first clutch drum 15 is a bottomed cylindrical member that is open on the input shaft 11 side and has a larger diameter than the first clutch hub 13, and rotates integrally with the first output shaft 12A. A spline groove GR2 parallel to the axial direction is formed on the inner peripheral surface of the cylindrical portion of the first clutch drum 15. The first friction plate 14B is an example of a second plate member according to the present invention, and is attached to the inner peripheral surface of the first clutch drum 15 in a splined manner and movable in the axial direction. A plurality of the first friction plates 14B are alternately attached to the first separate plate 14A, and a friction material (not shown) is attached to the surface facing the first separate plate 14A.

  The pressure contact plate 16 is an annular plate-like member that is rotatably inserted into the first clutch hub 13. A disc spring 16A is disposed between the pressure contact plate 16 and the first friction plate 14B. The first piston 17 has a cylindrical shape and moves in the axial direction toward the output shafts 12A and 12B, thereby pressing the plates 14A and 14B in the axial direction via the pressure plate 16 and the disc spring 16A. . On the contrary, when the first piston 17 moves toward the input shaft 11, the plates 14A and 14B are opened. The first wet multi-plate clutch C1 is brought into a clutch contact state by the pressure contact of the plates 14A and 14B, and is brought into a clutch disengagement state by opening the plates 14A and 14B.

  The cover member 18 is a bottomed cylindrical member with the output shafts 12 </ b> A and 12 </ b> B open, and the diameter of the inner peripheral surface thereof is aligned with the diameter of the outer peripheral surface of the first piston 17. A portion of the first piston 17 on the input shaft 11 side is inserted into the cover member 18 in a liquid-tight state.

  A hydraulic oil chamber 19 filled with hydraulic oil is formed between the first piston 17 and the cover member 18. When the hydraulic pressure in the hydraulic oil chamber 19 increases, the first piston 17 moves in the axial direction toward the first clutch hub 13 to press the plates 14A and 14B against each other (first wet multi-plate clutch C1: Contact). In the pressure contact state, the driving force of the engine E is transmitted to the first output shaft 12A via the input shaft 11, the first clutch hub 13, the plates 14A and 14B, and the first clutch drum 15.

  A plurality of return springs (not shown) are provided between the first piston 17 and the first clutch hub 13 to urge the first piston 17 in a direction away from the first clutch hub 13. That is, when the hydraulic pressure in the hydraulic oil chamber 19 is lowered, as shown in FIG. 2, the first piston 17 is moved away from the first clutch hub 13 by the urging force of the return spring to press the plates 14A and 14B. The state is released (first wet multi-plate clutch C1: disengaged).

  The first wet multi-plate clutch C1 includes a bottomed cylindrical first detent pin member 20 and a first detent pin member 20 that connect the first clutch hub 13 and the first piston 17 so as to be integrally rotatable. A first spring member 21 that biases toward the pin insertion hole of the first clutch hub 13 is provided.

  The second wet multi-plate clutch C2 includes a second clutch hub 33, a second separate plate 34A, a second clutch drum 35, a second friction plate 34B, a disc spring 36A, a second piston 37, and hydraulic oil. The chamber 39, the 2nd non-rotating pin member 40, and the 2nd spring member 41 are provided, and it is comprised substantially the same as the 1st wet multi-plate clutch C1.

  For example, the second separate plate 34A (an example of the first plate member according to the present invention) is spline-fitted to the inner peripheral surface (spline groove GR3) of the second clutch hub 33 and attached in a state of being movable in the axial direction. It has been. Further, the second friction plate 34B (an example of the second plate member according to the present invention) is spline-fitted to the outer peripheral surface (spline groove GR4) of the second clutch drum 35 and is attached so as to be movable in the axial direction. ing.

  Each configuration of the second wet multi-plate clutch C2 has the same function as the first wet multi-plate clutch C1. Briefly, as the hydraulic pressure in the hydraulic oil chamber 39 rises, the second piston 37 is moved in the axial direction toward the second clutch hub 33. As a result, the second wet multi-plate clutch C2 is engaged with the clutch. When the hydraulic pressure in the hydraulic oil chamber 39 is lowered, the second piston 37 is moved away from the second clutch hub 33 by the urging force of the return spring, and the second wet multi-plate clutch C2 is disengaged.

  In the second wet multi-plate clutch C2, the first wet multi-plate clutch C1 is disconnected when the first wet multi-plate clutch C1 is engaged (see FIG. 1). (See FIG. 2). When the second wet multi-plate clutch C2 is brought into contact, the driving force of the engine E is passed through the input shaft 11, the first clutch hub 13, the second clutch hub 33, the plates 34A and 34B, and the second clutch drum 35. Is transmitted to the second output shaft 12B.

  Next, the separate plate will be described. First, the first separate plate 14A will be described.

  As shown in FIGS. 3A and 3B, the first separate plate 14 </ b> A includes a first plate 51 and a second plate 61.

  The first plate 51 has an annular plate-like base portion 52 and a plurality of spline protrusions 53 that protrude from the inner peripheral edge of the base portion 52 toward the center in the radial direction and that are provided at predetermined angular intervals in the circumferential direction. And. The spline protrusion 53 is an example of a plate-like protrusion of the present invention, and is a portion that is fitted into an axial spline groove GR1 formed on the outer peripheral surface of the first clutch hub 13.

  The second plate 61 has an annular plate-shaped base portion 62 and a plurality of spline protrusions 63 that protrude from the inner peripheral edge of the base portion 62 toward the center in the radial direction and that are provided at predetermined angular intervals in the circumferential direction. And. The spline protrusion 63 is also an example of the plate-like protrusion of the present invention, and is a portion that is fitted in the axial spline groove GR1 formed on the outer peripheral surface of the first clutch hub 13.

  As shown in FIG. 3B, the spline protrusion 53 of the first plate 51 and the spline protrusion 63 of the second plate 61 are disposed so as to face each other in the axial direction. Are integrated via a spacer SP1. The spacer SP1 is a block member whose cross-sectional shape is aligned with the cross-sectional shape of the spline protrusions 53 and 63, and is joined to each of the spline protrusion 53 and the spline protrusion 63 by welding (for example, brazing). .

  As shown in FIG. 4, spline teeth PR1 having an axial length corresponding to the thickness TC of the first separate plate 14A are produced by joining the spline protrusions 53 and 63 and the spacer SP1. The spline teeth PR1 are fitted into the spline groove GR1, and serve as a guide when the first separate plate 14A is moved in the axial direction.

  The length of the spline teeth PR1 in the axial direction is sufficiently longer than the thickness of the spline protrusions 53 and 63. For this reason, the spline teeth PR1 hardly undergo deformation such as bending, and can smoothly guide the first separate plate 14A. As a result, the operating characteristics of the clutch device 10 can be improved.

  Next, the second separate plate 34A will be described.

  As shown in FIGS. 5A and 5B, the second separate plate 34 </ b> A includes a first plate 71 and a second plate 81.

  The first plate 71 has an annular plate-like base portion 72 and a plurality of spline protrusions 73 that protrude outward from the outer peripheral edge of the base portion 52 in the radial direction and that are provided at predetermined angular intervals in the circumferential direction. It has. The spline protrusion 73 is an example of a plate-like protrusion of the present invention, and is a portion that is fitted into an axial spline groove GR3 formed on the outer peripheral surface of the second clutch hub 33.

  The second plate 81 has an annular plate-like base portion 82 and a plurality of spline protrusions 83 that protrude radially outward from the outer peripheral edge of the base portion 82 and that are provided at predetermined angular intervals in the circumferential direction. It has. The spline protrusion 83 is also an example of the plate-like protrusion of the present invention, and is a portion that is fitted into the axial spline groove GR3 formed on the inner peripheral surface of the second clutch hub 33.

  As shown in FIG. 5B, the spline protrusion 73 of the first plate 71 and the spline protrusion 83 of the second plate 81 are disposed so as to face each other in the axial direction. Are integrated via a spacer SP2. The spacer SP2 is a block member whose cross-sectional shape is aligned with the cross-sectional shape of the spline protrusions 73 and 83, and is joined to each of the spline protrusion 73 and the spline protrusion 83 by welding (for example, brazing). .

  As shown in FIG. 6, spline teeth PR2 having an axial length corresponding to the thickness of the second separate plate 34A are produced by joining the spline protrusions 73 and 83 and the spacer SP2. The spline teeth PR2 are fitted into the spline groove GR3 and serve as a guide when the second separate plate 34A moves in the axial direction.

  The axial length of the spline teeth PR2 is sufficiently longer than the thickness of each spline protrusion 73, 83. For this reason, the spline teeth PR2 are not easily deformed such as bending, and can smoothly guide the second separate plate 34A. As a result, the operating characteristics of the clutch device 10 can be improved.

  The above description of the embodiment is for facilitating the understanding of the present invention, and does not limit the present invention. The present invention can be changed and improved without departing from the gist thereof, and the present invention includes equivalents thereof. For example, you may comprise as follows.

  In the above-described embodiment, the separate plate is divided into the first plate and the second plate, but the present invention is not limited to this configuration. The separate plate may be divided into a plurality of three or more.

  In the above-described embodiment, the separation plate is the target of division, but the present invention is not limited to this configuration. The friction plate may be a division target.

DESCRIPTION OF SYMBOLS 10 ... Clutch apparatus, 11 ... Input shaft, 12A ... 1st output shaft, 12B ... 2nd output shaft, 13 ... 1st clutch hub, 14A ... 1st separate plate, 14B ... 1st friction plate, 15 ... 1st clutch Drum, 16 ... pressure contact plate, 17 ... first piston, 18 ... cover member, 19 ... hydraulic oil chamber, 20 ... pin member, 21 ... first spring member, 33 ... second clutch hub, 34A ... second separate plate, 34B ... second friction plate, 35 ... second clutch drum, 37 ... second piston, 39 ... hydraulic oil chamber, 40 ... pin member, 51 ... first plate, 52 ... base portion, 53 ... spline protrusion, 61 ... Second plate, 62 ... base portion, 63 ... spline protrusion, E ... engine, T ... transmission, C1 ... first wet multi-plate clutch, C2 The second wet multi-plate clutch, GR1 to GR4 ... spline grooves, SP1 ... spacer, PR1 ... spline teeth

Claims (2)

A clutch device that is provided between an input shaft and an output shaft arranged on the same axis, and transmits rotation of the input shaft to the output shaft;
A clutch hub rotated integrally with the input shaft;
A clutch drum rotated integrally with the output shaft;
A first plate member splined to the clutch hub;
A second plate member splined to the clutch drum;
A piston that can move in the axial direction and press-contact the first plate member and the second plate member with each other;
One of the first plate member and the second plate member is
A plurality of plates that are arranged opposite to each other and formed with a plurality of plate-like protrusions that are fitted into the spline grooves,
A clutch device comprising a spacer interposed between the opposing plate-like projections and joined to each of the plate-like projections.   The clutch device according to claim 1, wherein the plate-like protrusion and the spacer are joined by welding.

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