JP6349815B2 - 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 by separating the piston from the clutch plate (clutch disconnection). The return spring is interposed between the clutch hub and the piston.

  In such a wet multi-plate clutch device, if acceleration in the rotational direction occurs in the clutch hub when the clutch is disconnected, the return spring may fall down due to differential rotation between the clutch hub and the piston, and the clutch may not function. . For this reason, there has been known one provided with a detent pin that connects the clutch hub and the piston so as to be integrally rotatable (see, for example, Patent Document 1).

JP 62-167933 A

  By the way, when the length of the detent pin is shorter than the stroke length of the piston, or when the detent pin is not fixed to either the piston or the clutch hub, the movement of the detent pin cannot be regulated. When the clutch where the clutch hub and the piston are most separated from each other is disengaged, the detent pin may fall off and cause the return spring to fall.

  If the axial length of the locking pin is increased to prevent the locking pin from falling off, the locking pin may interfere with the piston when the clutch is engaged, and the clutch plates may not be pressed against each other. .

  An object of the present invention is to reliably prevent the rotation-stop pin that connects the clutch hub and the piston so as to be integrally rotatable.

  To achieve the above object, a clutch device of the present invention includes a clutch hub that can rotate integrally with an input shaft, a clutch drum that can rotate integrally with an output shaft, and a first spline-fitted to the outer periphery of the clutch hub. A plate, a second plate that is spline-fitted to the inner periphery of the clutch drum, a piston that can move in the axial direction and press the first and second plates together, and a first that is provided on the clutch hub. A pin member that is inserted into one hole and a second hole provided in the piston and connects the clutch hub and the piston so as to be integrally rotatable, and one end side of the pin member is disposed in the first hole or the While being held in either one of the second holes, the protruding length of the other end side of the pin member is longer than the stroke length of the piston. To.

  Also, biasing means provided in any one of the first hole and the second hole and biasing the pin member toward the bottom of either the first hole or the second hole. Further, it may be provided.

  Moreover, you may further provide the fixing means which fixes the edge part of the said pin member to the bottom part of either the said 1st hole or the said 2nd hole.

  According to the clutch device of the present invention, it is possible to reliably prevent the detent pin that connects the clutch hub and the piston so as to be integrally rotatable.

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 one embodiment of the present invention. It is a typical longitudinal cross-sectional view which shows the upper half of the state which the 1st wet multi-plate clutch cut | disconnected in the clutch apparatus which concerns on one Embodiment of this invention. It is a typical longitudinal cross-sectional view which shows the upper half of the clutch apparatus which concerns on other embodiment. It is a typical longitudinal cross-sectional view which shows the upper half of the clutch apparatus which concerns on other embodiment.

  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 10A of the present embodiment is a dual clutch device including a first wet multi-plate clutch C1 and a second wet multi-plate clutch C2, and reference numeral 11 denotes a driving force of the engine E. The input shaft to be transmitted is shown. Reference numeral 12A denotes a second output shaft provided with a plurality of transmission gears (not shown) that establish, for example, even stages of the transmission T, and reference numeral 12B denotes a plurality of transmissions that establish, for example, odd stages of the transmission T. The 1st output shaft provided with the gear (not shown) is shown. The first output shaft 12B is rotatably inserted into the hollow shaft of the second output shaft 12A.

  The first wet multi-plate clutch C1 includes a cylindrical first clutch hub 13 that rotates integrally with the input shaft 11, and a plurality of inner plates (first plates) 14A that are spline-fitted to the outer peripheral surface of the first clutch hub 13. And a cylindrical first clutch drum 15 that has a larger diameter than the first clutch hub 13 and rotates integrally with the first output shaft 12B, and an inner plate 14A that is alternately disposed between the first clutch drum 15 and the first clutch drum 15. A plurality of outer plates (second plates) 14B that are spline-fitted to the inner peripheral surface, an annular pressure contact plate 16 that is rotatably inserted into the first clutch hub 13, a pressure contact plate 16, and a disc spring 16A. A cylindrical first piston 17 capable of pressing the plates 14A and 14B in the axial direction, and a bottomed circle having an inner peripheral surface in contact with the outer peripheral surface of the first piston 17 And a Jo cover member 18.

  A hydraulic oil chamber 19 is defined between the first piston 17 and the cover member 18. When the hydraulic pressure in the hydraulic oil chamber 19 rises, the first piston 17 moves in the axial direction toward the first clutch hub 13 and presses the plates 14A and 14B together (first wet multi-plate clutch C1: Contact). That is, the driving force of the engine E is transmitted to the second output shaft 12A via the input shaft 11, the first clutch hub 13, the plates 14A and 14B, and the first clutch drum 15.

  Although not shown, a plurality of return springs that urge the first piston 17 in a direction away from the first clutch hub 13 are interposed between the first piston 17 and the first clutch hub 13. ing. 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 a return spring (not shown), and each plate 14A is moved. , 14B is released (first wet multi-plate clutch C1: disengaged).

  The first wet multi-plate clutch C1 of this embodiment includes a bottomed cylindrical first detent pin member 20 that connects the first clutch hub 13 and the first piston 17 so as to be integrally rotatable.

  The first non-rotating pin member 20 has its bottom cylindrical portion (one end side) inserted into a pin insertion hole (first hole) formed in the first clutch hub 13, and its open side cylindrical portion (other end). Side) is slidably inserted into a pin insertion hole (second hole) formed in the first piston 17. Further, the protruding length of the first detent pin member 20 from the first clutch hub 13 (the protruding length on the other end side) is formed longer than the stroke length of the first piston 17. Further, a part of the first spring member 21 (biasing means) is accommodated in the cylinder of the first detent pin member 20.

  One end of the first spring member 21 is brought into contact with the bottom of the pin insertion hole of the first piston 17 and the other end thereof is brought into contact with the bottom of the cylinder of the first detent pin member 20. In other words, the first detent pin member 20 is constantly urged toward the pin insertion hole of the first clutch hub 13 by the first spring member 21.

  The clutch device 10 </ b> A of the present embodiment includes the first detent pin member 20 and the first spring member 21 described above, whereby the first wet multi-plate clutch in which the first clutch hub 13 and the first piston 17 are most separated from each other. Even when C1 is disconnected (when the stroke amount of the first piston 17 is substantially zero), one end of the first detent pin member 20 is held in the pin insertion hole of the first clutch hub 13, and the first detent pin member A part of the other end side 20 (a part longer than the stroke length of the first piston 17) is held in the pin insertion hole of the first piston 17. This reliably prevents the first detent pin member 20 from falling off.

  The second wet multi-plate clutch C2 includes a second clutch hub 33, a second clutch drum 35, an inner plate 34A, an outer plate 34B, a second piston 37, and a hydraulic oil chamber 39. The configuration is substantially the same as the one wet multi-plate clutch C1. Further, the second wet multi-plate clutch C2 includes a second detent pin member 40 and a second spring member 41, like the first wet multi-plate clutch C1. Each configuration of the second wet multi-plate clutch C2 has the same function as that of the first wet multi-plate clutch C1, and thus detailed description thereof is omitted. The second wet multi-plate clutch C2 is disconnected when the first wet multi-plate clutch C1 is engaged (see FIG. 1), and is engaged when the first wet multi-plate clutch C1 is disconnected (see FIG. 1). (See FIG. 2).

  Next, the effect by the clutch apparatus 10A of this embodiment is demonstrated.

  In the clutch device 10A of the present embodiment, the non-rotating pin members 20 and 40 for connecting the clutch hubs 13 and 33 and the pistons 17 and 37 so as to be integrally rotatable are connected to the pin insertion holes of the clutch hubs 13 and 33 by the spring members 21 and 41. The movement of the detent pin members 20 and 40 is regulated by always contacting the bottom. Further, the protruding length of the rotation-preventing pin members 20 and 40 from the clutch hubs 13 and 33 is longer than the stroke length of the pistons 17 and 37.

  That is, even in the clutch disengaged state in which the stroke amount of the pistons 17 and 37 is approximately zero (the pistons 17 and 37 and the clutch hubs 13 and 33 are most distant from each other), the bottom side cylindrical portions of the rotation prevention pin members 20 and 40 are 17 and 37 are configured to be held in the pin insertion holes of the clutch hubs 13 and 33, and the opening side cylindrical portions of the rotation preventing pin members 20 and 40 are held in the pin insertion holes of the clutch hubs 13 and 33.

  Accordingly, it is possible to effectively prevent the non-rotating pin members 20 and 40 from falling off, and reliably prevent the return spring from falling down caused by the differential rotation between the clutch hubs 13 and 33 and the pistons 17 and 37. be able to.

  Further, the spring members 21 and 41 of the present embodiment function not only as a function of restricting the movement of the non-rotating pin members 20 and 40 but also as a return spring that separates the pistons 17 and 37 when the clutch is disengaged.

  Therefore, the device can be simplified, for example, the number of return springs can be reduced as compared with a clutch device having a conventional structure in which the rotation prevention pin member and the return spring are provided separately.

  In addition, this invention is not limited to the above-mentioned embodiment, In the range which does not deviate from the meaning of this invention, it can change suitably and can implement.

  For example, as shown in FIG. 3, the non-rotating pin members 20 and 40 may be constantly urged into the pin insertion holes of the pistons 17 and 37 by spring members 21 and 41. Further, the spring members 21 and 41 that urge the rotation preventing pin members 20 and 40 are not limited to coil springs, and other elastic deformation members such as leaf springs may be applied. Further, as shown in FIG. 4, the spring members 21 and 41 may be omitted, and the anti-rotation pin members 20 and 40 may be directly fixed to the clutch hubs 13 and 33 with bolt nuts 50 and 51. Further, without using the spring members 21, 41 and the bolt nuts 50, 51, the one end side cylindrical portion of the rotation-preventing pin members 20, 40 is inserted into one of the pin insertion holes of the clutch hubs 13, 33 or pistons 17, 37. It may be inserted. Moreover, clutch apparatus 10A-C is not limited to a dual clutch, It is also possible to apply to a single clutch.

10A, B, C Clutch device 11 Input shaft 12A, 12B Output shaft 13, 33 Clutch hub 14A, 34A Inner plate 14B, 34B Outer plate 15, 35 Clutch drum 16 Pressure plate 17, 37 Piston 18 Cover member 19, 39 Hydraulic oil Chamber 20, 40 Non-rotating pin member 21, 41 Spring member

Claims (2)

A clutch hub that can rotate integrally with the input shaft;
A clutch drum that can rotate integrally with the output shaft;
A first plate that is spline fitted to the outer periphery of the clutch hub;
A second plate splined to the inner periphery of the clutch drum;
A piston capable of axially moving the stroke and pressing the first plate and the second plate together;
A bottomed first hole provided in the clutch hub ;
A bottomed second hole provided in the piston ;
A bottomed cylindrical pin member which is inserted into the first hole and the second hole and which connects the clutch hub and the piston so as to be integrally rotatable;
Biasing means accommodated in the pin member ,
The biasing means has one end in contact with one bottom of the first hole and the second hole, and the other end in contact with the bottom inner surface of the pin member, and the bottom outer surface of the pin member is Energizing to contact the bottom of the other of the first hole and the second hole,
The clutch device characterized in that the pin member is held in the other by the biasing means, and the protruding length of the pin member from the other is longer than the stroke length of the piston. The clutch device according to claim 1, wherein the urging means is formed by a coil spring .

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