JP2017155883A - Power transmission device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power transmission device capable of properly applying engine brake even when a weight member is located on an inner diameter-side position, and suppressing increase of the number of components.SOLUTION: A power transmission device having an interlocking member 9 for moving a pressure member 5 from a non-operation position to an operation position in accompany with movement of a weight member 8 from an inner diameter-side position to an outer diameter-side position, and an operation member 10 capable of moving the pressure member 5 from the operation position to the non-operation position, further includes a one-way clutch 11 for blocking power transmission from an input gear 1 to an output shaft 3 and transmitting power from the output shaft 3 toward the input gear 1 when the weight member 8 is located on the inner diameter-side position, and a dog clutch 10b capable of blocking the power transmission from the output shaft 3 toward the input gear 1 by the one-way clutch 11, and the dog clutch 10b is disposed integrally with the operation member 10.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a power transmission device that can arbitrarily transmit or block the rotational force of an input member to an output member.

  In general, a power transmission device included in a motorcycle is used to arbitrarily transmit or cut off the driving force of an engine to a transmission and a driving wheel. An input member connected to the engine side, a transmission and a driving wheel side, It has a connected output member, a clutch member connected to the output member, and a pressure member that can approach or separate from the clutch member, and is driven by bringing the pressure member close to the clutch member. The side clutch plate and the driven clutch plate are pressed against each other to transmit power, and the pressure member is separated from the clutch member to release the pressure contact force between the driving side clutch plate and the driven side clutch plate. Therefore, the transmission of the power is cut off.

  Further, as a conventional power transmission device, for example, as disclosed in Patent Document 1, the groove portion is disposed in a groove portion extending in the radial direction of the clutch housing, and the groove portion is subjected to centrifugal force accompanying rotation of the clutch housing. There has been proposed one having a weight member capable of pressing the driving side clutch plate and the driven side clutch plate by moving from the inner diameter side position to the outer diameter side position. According to such a conventional power transmission device, the clutch housing rotates as the engine is driven, whereby a centrifugal force can be applied to the weight member, and the driving side clutch plate and the driven side clutch plate are brought into pressure contact with each other. The driving force of the engine can be transmitted to the wheels.

JP2013-221585A

  In the above conventional power transmission device, when the engine is at a predetermined rotation speed or less and the weight member is at the inner diameter side position, the driving side clutch plate and the driven side clutch plate are not in pressure contact with each other. There was a problem that the engine brake could not be transmitted to the engine side.

  Therefore, the present applicant uses a one-way clutch that interrupts power transmission from the engine side to the wheel side and performs power transmission from the wheel side to the engine side when the weight member is at the inner diameter side position, and a one-way clutch. Although a dog clutch that can cut off power transmission from the wheel side to the engine side has been studied, a power transmission device has been studied that can generate engine braking satisfactorily even when the weight member is at the inner diameter side position. In this case, a dog clutch is required in addition to the one-way clutch, which increases the number of parts and increases the manufacturing cost.

  The present invention has been made in view of such circumstances, and provides a power transmission device that can satisfactorily generate an engine brake even when the weight member is positioned on the inner diameter side and can suppress an increase in the number of components. It is to provide.

  The invention according to claim 1 is formed alternately with a clutch housing that rotates together with an input member that is rotated by a driving force of a vehicle engine and has a plurality of drive side clutch plates, and a drive side clutch plate of the clutch housing. A plurality of driven-side clutch plates, a clutch member connected to an output member capable of rotating a vehicle wheel, and the driving-side clutch plate and the driven-side clutch plate are brought into pressure contact with each other so that the driving force of the engine is applied to the wheels. An operating position for enabling transmission, and a non-operating position capable of blocking the transmission of the driving force of the engine to the wheels by releasing the pressure contact force between the driving side clutch plate and the driven side clutch plate. A pressure member movable between the clutch housing and a groove extending in the radial direction of the clutch housing, and the centrifugal force generated by the rotation of the clutch housing A weight that can be moved from the radial side position to the outer radial side position and that can move the pressure member from the non-operating position to the operating position as it moves from the inner diameter side position to the outer radial side position. In a power transmission device having a member and an operating member that is operated by a manual operation or an actuator and can move the pressure member from the operating position to the non-operating position, when the weight member is at an inner diameter side position, A one-way clutch that blocks power transmission from the input member to the output member and performs power transmission from the output member to the input member, and a blocking unit that can block power transmission from the output member to the input member by the one-way clutch And the blocking member is formed integrally with the operating member.

  According to a second aspect of the present invention, in the power transmission device according to the first aspect, the shut-off means is a dog clutch formed on the operating member.

  According to a third aspect of the present invention, in the power transmission device according to the first or second aspect, the pressure member includes external fastening means for fastening the output member and the clutch member to attach the entire device to the vehicle. An opening that can be exposed to the surface is formed, and the operating member is attached to the opening.

  According to a fourth aspect of the present invention, in the power transmission device according to any one of the first to third aspects, the clutch housing includes a bottomed cup-shaped member, and the groove portion is formed on the opening side of the clutch housing. A weight housing is attached.

  According to a fifth aspect of the present invention, in the power transmission device according to any one of the first to fourth aspects, the operating member moves in the axial direction of the pressure member when operated manually or by an actuator, In the movement process, the circlip fixed to the pressure member is brought into contact, and the pressure member can be moved in the same direction to change from the inoperative position to the activated position.

  According to the first aspect of the present invention, when the weight member is at the inner diameter side position, the one-way clutch that blocks power transmission from the input member to the output member and performs power transmission from the output member to the input member; And a means for shutting off power transmission from the output member to the input member by the clutch, and the actuating member is integrally formed with the shut-off means. It can be generated and an increase in the number of parts can be suppressed.

  In addition, when the vehicle is running, power transmission from the output member to the input member is performed by the drive-side clutch plate and the driven-side clutch plate that are in pressure contact when the weight member is at the outer diameter side position. When it is at the inner diameter side position, it is performed by a one-way clutch. Therefore, the power transmission path from the output member to the input member can be varied according to the position of the weight member, and power transmission from the output member to the input member can be appropriately performed.

  Further, since the blocking means is integrally formed with the operating member, the movement of the pressure member by the operating member at the time of shifting and the interruption of power transmission by the blocking means can be performed simultaneously by the same member, and the response of the blocking means Can be further improved.

  According to the invention of claim 2, since the shut-off means is composed of a dog clutch formed on the operating member, the power transmission from the output member to the input member by the one-way clutch and the shut-off of the power transmission can be surely performed. .

  According to the third aspect of the present invention, the pressure member is formed with an opening capable of facing the outside for fastening means for fastening the output member and the clutch member to attach the entire apparatus to the vehicle. Since the actuating member is attached, it is possible to release the fastening with a tool by removing the actuating member and exposing the fastening means to the outside, and the removal work of the entire device from the vehicle can be performed more easily. .

  According to the fourth aspect of the present invention, the clutch housing is made of a cup-shaped member with a bottom, and the weight housing having the groove portion is attached to the opening side of the clutch housing, so that the weight member is arranged on the opening side of the clutch housing. It can be set as the installed power transmission device.

  According to the invention of claim 5, the operating member moves in the axial direction of the pressure member when operated by a manual operation or an actuator, and abuts on the circlip fixed to the pressure member in the moving process, and the pressure member Can be moved from the non-operating position to the operating position by moving in the same direction, so that the movement of the operating member and the movement of the pressure member from the non-operating position to the operating position can be easily performed via the circlip.

1 is an external view showing a power transmission device according to an embodiment of the present invention. A longitudinal sectional view showing the internal configuration of the power transmission device The perspective view which shows the input gear and clutch housing in the same power transmission device The perspective view which shows the weight housing in the same power transmission device The perspective view which shows the clutch member in the power transmission device The perspective view which shows the pressure member in the same power transmission device Front view showing interlocking member (with one-way clutch attached) in the power transmission device The perspective view which shows the inner member which comprises the one-way clutch attached to the attachment member Three views showing the inner member Sectional drawing which shows the fitting surface of the inner member The perspective view which shows the retainer member which comprises the one-way clutch in the same power transmission device The perspective view which shows the action | operation member in which the dog clutch in the same power transmission device was integrally formed Longitudinal sectional view showing the operating member Sectional drawing which shows the fitting surface of the dog clutch Schematic diagram for explaining the operation of the pressure-assist assist cam in the power transmission device Schematic diagram for explaining the operation of the back torque limiter cam in the power transmission device Sectional drawing which shows the engagement state of the dog clutch in the same power transmission device A longitudinal sectional view showing the internal configuration of the power transmission device A longitudinal sectional view showing the internal configuration of the power transmission device A longitudinal sectional view showing the internal configuration of the power transmission device A longitudinal sectional view showing the internal configuration of the power transmission device A longitudinal sectional view showing the internal configuration of the power transmission device A longitudinal sectional view showing the internal configuration of the power transmission device

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
The power transmission device according to the present embodiment is disposed in a vehicle such as a two-wheeled vehicle and arbitrarily transmits or cuts off the driving force of the engine to the mission or driving wheel side, as shown in FIGS. A clutch housing 2 in which an input gear 1 (input member) that rotates by the driving force of the engine E of the vehicle is formed, and a clutch member 4 connected to an output shaft 3 (output member) that can rotate the wheels D of the vehicle; A pressure member 5 attached to the right side of the clutch member 4 in FIG. 2, a plurality of drive side clutch plates 6 and a plurality of driven side clutch plates 7, and a rigid ball member capable of rolling in the clutch housing 2 in the radial direction. A weight member 8, an interlocking member 9, an operation member 10 that can be operated manually or by an actuator (not shown), a one-way clutch 11, and a weight housing 12. It is configured.

  The input gear 1 is rotatable about the output shaft 3 when a driving force (rotational force) transmitted from the engine E is input, and is connected to the clutch housing 2 by a rivet R or the like. As shown in FIG. 3, the clutch housing 2 is composed of a bottomed cup-shaped member opened on the right end side in the drawing, and rotates with the rotation of the input gear 1 by the driving force of the engine E. A plurality of notches 2a are formed in the direction, and the drive side clutch plate 6 is fitted in each of the notches 2a. Each of the driving side clutch plates 6 is made of a plate material formed in a substantially annular shape, and is configured to rotate with the rotation of the clutch housing 2 and to slide in the axial direction (left and right direction in FIG. 2). Yes.

  As shown in FIGS. 2 and 4, the weight housing 12 is composed of a bottomed cup-shaped member, and is attached to the opening side (the right side in FIG. 2) of the clutch housing 2 so as to rotate together with the clutch housing 2. In addition, a plurality of grooves 12 a extending in the radial direction of the weight housing 12 are formed on the bottom surface. Weight members 8 are accommodated in the grooves 12a, respectively. When the clutch housing 2 and the weight housing 12 are stopped (engine stopped or idling state) and rotated at a low speed, the weight member 8 is positioned on the inner diameter side. (The position shown in FIG. 2), and when the clutch housing 2 and the weight housing 12 are rotated at a high speed, the weight member 8 is set to the outer diameter side position (position shown in FIG. 19). .

  The clutch member 4 is connected to a spline formed in a central hole 4c of the clutch member 4 by fitting with a spline formed at a tip portion of the output shaft 3 (output member). The output shaft 3 is also rotated when the clutch member 4 is rotated. That is, the clutch member 4 and the output shaft 3 are connected in the rotational direction by spline fitting and fastened by the nut N, and the entire power transmission device is attached to the vehicle by such fastening. .

  Further, as shown in FIGS. 2 and 4, the weight housing 12 according to the present embodiment is formed with a bulging portion 12 e that bulges in the circumferential direction at the opening-side end portion Q, and the bulging portion. 12e contacts the mounting surface 2b (see FIG. 3) formed on the opening side end portion P of the clutch housing 2, and the weight housing 12 is positioned in the radial direction. The mounting surface 12e is a surface obtained by molding the weight housing 12 and then cutting the vicinity of the opening-side end portion P.

  2 and 3, the mounting surface 12e is formed with a mounting groove 2c into which the circlip 17 can be fitted, and the weight housing 12 is pulled out by the circlip 17 fitted into the mounting groove 2c. It can be stopped. In other words, the weight housing 12 is attached to the attachment surface 12 e formed in the clutch housing 2 and positioned in the radial direction, and the circlip 17 is positioned in the axial direction.

  Further, a pressure member 5 is attached to the clutch member 4, and a plurality of driving side clutch plates 6 and driven side clutch plates 7 are provided between the flange surface 5 c of the pressure member 5 and the flange surface 4 d of the clutch member 4. Is attached. The pressure member 5 has an operating position (see FIG. 19) in which the driving side clutch plate 6 and the driven side clutch plate 7 are brought into pressure contact with each other so that the driving force of the engine E can be transmitted to the wheels D, and the driving side clutch plate. 6 and a non-operating position (see FIG. 2) that can block the transmission force of the engine E from being transmitted to the wheels D by releasing the pressure contact force between the driven clutch plate 7 and the driven clutch plate 7. .

  More specifically, as shown in FIG. 5, the outer peripheral side surface 4e of the clutch member 4 is formed with a spline extending in the axial direction (the left-right direction in the figure), and the driven clutch plate 7 is formed on the spline. Is inserted and formed. That is, the spline formed on the outer peripheral side surface 4e of the clutch member 4 is formed in a concavo-convex shape integrally formed over substantially the entire circumference of the outer peripheral side surface 4e of the clutch member 4 as shown in FIG. The driven-side clutch plate 7 is fitted into the concave groove constituting the spline, so that the movement of the driven-side clutch plate 7 in the rotational direction is restricted while allowing the axial movement of the driven-side clutch plate 7 with respect to the clutch member 4. It is configured to be able to rotate together with the clutch member 4.

  The driven clutch plates 7 are alternately stacked with the drive side clutch plates 6 so that the adjacent clutch plates 6 and 7 can be pressed or released. That is, both the clutch plates 6 and 7 are allowed to slide in the axial direction of the clutch member 4, and the pressure member 5 moves to the left side in FIG. 2 and its flange surface 5 c and the flange surface of the clutch member 4. When 4d approaches, both clutch plates 6 and 7 are brought into pressure contact, and the rotational force of the clutch housing 2 is transmitted to the clutch member 4 and the output shaft 3 via the pressure member 5, and the pressure member 5 is in the right side in FIG. When the flange surface 5c and the flange surface 4d of the clutch member 4 are separated from each other, the pressure contact force of both the clutch plates 6 and 7 is released, and the clutch member 4 does not follow the rotation of the clutch housing 2 and stops. The rotational force is not transmitted to the output shaft 3.

  Thus, in a state where the driving side clutch plate 6 and the driven side clutch plate 7 are in pressure contact with each other, the rotational force (engine driving force) input to the clutch housing 2 is transmitted to the wheels via the output shaft 3 (output member). The rotational force (engine driving force) input to the clutch housing 2 is transmitted to the output shaft 3 (output) while being transmitted to the D side and the pressure contact between the driving clutch plate 6 and the driven clutch plate 7 is released. Transmission to the member) can be blocked.

  Further, in the present embodiment, as shown in FIGS. 5 and 6, the clutch member 4 is formed with slope surfaces 4 a and 4 b, and the pressure member 5 has a slope facing these slope surfaces 4 a and 4 b. Surfaces 5a and 5b are formed. That is, the gradient surface 4a and the gradient surface 5a are in contact with each other to form a pressure contact assist cam, and the gradient surface 4b and the gradient surface 5b are in contact with each other to form a back torque limiter cam.

  Then, the rotational speed of the engine E increases, and the rotational force input to the input gear 1 and the clutch housing 2 can be transmitted to the output shaft 3 via the pressure member 5 and the clutch member 4 (the weight member is on the outer diameter side). 15, since a rotational force in the direction a is applied to the pressure member 5 as shown in FIG. 15, the pressure member 5 is acted on the pressure member 5 in the direction c in FIG. A force is generated. As a result, the pressure member 5 moves in a direction in which the flange surface 5c is closer to the flange surface 4d of the clutch member 4 (left side in FIG. 2), and the drive side clutch plate 6 and the driven side clutch plate 7 The pressure contact force is increased.

  On the other hand, when the vehicle is traveling and the rotation of the output shaft 3 exceeds the rotation speed of the input gear 1 and the clutch housing 2 and a back torque in the direction b in FIG. 16 is generated, the back torque limiter cam acts. The pressure member 5 is moved in the direction d in the figure to release the pressure contact force between the drive side clutch plate 6 and the driven side clutch plate 7. Thereby, the malfunction with respect to the power transmission device and power source (engine side) by back torque can be avoided.

  The weight member 8 is disposed in a groove 12a extending in the radial direction of the weight housing 12, and is positioned on the inner diameter side of the groove 12a by the centrifugal force accompanying the rotation of the clutch housing 2 and the weight housing 12 (see FIG. 2). The drive side clutch plate 6 and the driven side clutch plate 7 can be brought into pressure contact with each other by moving to the outer diameter side position (see FIG. 19). That is, the rolling surface (bottom surface) of the weight member 8 in the groove portion 12a is inclined upward from the inner diameter side position toward the outer diameter side position, and the weight member 8 is in a state where the clutch housing 2 and the weight housing 12 are stopped. When the clutch housing 2 and the weight housing 12 rotate, a centrifugal force is applied to the weight member 8 to move along an upward gradient (see FIG. 18), and the clutch housing 2 and the weight housing When 12 reaches a predetermined rotational speed, it is moved to the outer diameter side position (see FIG. 19).

  As shown in FIG. 7, the interlocking member 9 is formed of an annular member having a hole 9 a formed at the center and a plurality of protruding portions 9 b protruding from the outer peripheral edge. The protruding portion 9 b is formed in the weight housing 12. The groove shapes 12d (see FIG. 4) formed in the axial direction are respectively fitted and connected to be rotatable together with the weight housing 12 and movable in the left-right direction in FIG. The interlocking member 9 moves to the left in FIG. 2 against the urging force of the elastic member 13 as the weight member 8 moves from the inner diameter side position to the outer diameter side position, and presses the pressure member 5. Thus, it can be moved from the non-operating position to the operating position.

  The elastic member 13 (clutch spring) includes a coil spring interposed between the interlocking member 9 (specifically, the auxiliary member F attached to the interlocking member 9) and the pressure member 5, and the interlocking member 9 As the pressure member 5 is moved, the pressure member 5 can be moved in the direction in which the driving side clutch plate 6 and the driven side clutch plate 7 are pressed against each other by pressing the pressure member 5, and when the operating member 10 is operated, The pressing force against the interlocking member 9 can be absorbed. As shown in FIG. 2, a thrust bearing B2 is interposed between the elastic member 13 and the auxiliary member F attached to the interlocking member 9.

  That is, when the weight member 8 moves from the inner diameter side position to the outer diameter side position with the rotation of the clutch housing 2 and the weight housing 12, and the interlocking member 9 is pressed against the weight member 8, the pressing force is changed to the elastic member 13. 18 and 19, as shown in FIGS. 18 and 19, the pressure member 5 is moved to the left side in the drawing to bring the driving side clutch plate 6 and the driven side clutch plate 7 into pressure contact with each other, and in this state When the actuating member 10 is actuated, as shown in FIG. 22, the pressure member 5 moves to the right side in the drawing due to the axial movement of the actuating member 10, but the pressing force against the interlocking member 9 is applied to the elastic member 13. Thus, the position of the interlocking member 9 (the position of the weight member 8) is held.

  The interlocking member 9 according to the present embodiment is formed with an accommodating portion 9c that accommodates the one-way clutch 11 at the periphery of a hole 9a formed at the center thereof. The one-way clutch 11 interrupts power transmission from the input gear 1 (input member) to the output shaft 3 (output member) and inputs from the output shaft 3 (output member) when the weight member 8 is at the inner diameter side position. The power transmission toward the gear 1 (input member) is performed, and the inner member 11a, the retainer member 11b, the roller 11c, and the spring 11d are included.

  As shown in FIGS. 8 and 9, the inner member 11a is composed of an annular member having an outer peripheral wall surface 11aa and a surface 11ab on which a plurality of fitting surfaces Ka (see FIG. 10) are formed, and interlocks with the outer peripheral wall surface 11aa. A plurality of rollers 11c and springs 11d are attached between the member 9 and the inner peripheral wall surface of the retainer member 11b. That is, as shown in FIG. 11, the retainer member 11b is formed with a plurality of attachment portions 11ba, the base end of a spring 11d having a roller 11c fixed to the distal end is attached to the attachment portion 11ba, and the retainer member When 11b is assembled to the inner member 11a and the interlocking member 9, the roller 11c is positioned between the outer peripheral wall surface 11aa of the inner member 11a and the inner peripheral surface of the interlocking member 9, as shown in FIG.

  Further, on the outer peripheral wall surface 11aa of the inner member 11a, as shown in FIG. 7, a cam that is fitted to the roller 11c that relatively rotates in one direction and that does not fit to the roller 11c that relatively rotates in the other direction is formed. Yes. Thereby, when the rotation speed of the clutch housing 2 is higher than the rotation speed of the output shaft 3 (that is, when power is transmitted from the input gear 1 to the output shaft 3), the inner member 11a and the interlocking member 9 are relatively opposite to each other. Although the roller 11c is not fitted to the cam, the one-way clutch 11 is idled so that power transmission is not performed. On the other hand, when the rotation speed of the output shaft 3 is higher than the rotation speed of the housing 2 (that is, when power is transmitted from the output shaft 3 to the input gear 1), the inner member 11a and the interlocking member 9 are relatively rotated in one direction. Therefore, the roller 11c is fitted to the cam and power is transmitted by the one-way clutch 11.

  The actuating member 10 has an external shape as shown in FIG. 12 and is actuated by an operating means T (see FIG. 2) that can be operated manually or by an actuator, so that the driving side clutch plate 6 and the driven side clutch plate 7 The pressure member 5 can be moved in a direction in which the pressure contact force can be released (right side in FIG. 2). The operating means T can be moved to the right in the axial direction in FIG. 2 by operating a clutch pedal, a clutch lever or the like provided in the vehicle, or by actuating the actuator, and is on the inner race side of the bearing B1 attached to the operating member 10. The operating member 10 can be pressed to the right side in FIG.

  More specifically, the actuating member 10 is composed of a part attached to an opening 5d formed in the center of the pressure member 5, and rotates together with the pressure member 5 and has its axis (rotating shaft) with respect to the pressure member 5. ) Is slidable in the direction. Furthermore, the operating member 10 according to the present embodiment can move the pressure member 5 in the same direction by moving in the axial direction of the pressure member 5, and also includes a holding portion 10 a that holds the bearing B <b> 1 and a one-way clutch 11. A dog clutch 10b (blocking means) that can block power transmission from the output shaft 3 (output member) to the input gear 1 (input member) is integrally formed. Further, a disc spring 14 is attached between the operating member 10 and the circlip 16 fixed to the clutch member 4, and the operating member 10 is biased to the right side in FIG. It is assembled with.

  Thus, when the operating member 10 is pressed to the right side in FIG. 2 by the operating means T (or actuator) at the time of shifting, for example, the actuating member 10 resists the biasing force of the disc spring 14 in the opening 5d of the pressure member 5. It moves and abuts against the circlip 15 fixed to the pressure member 5 in the moving process, and the pressure member 5 can be moved in the same direction to change from the non-operating position to the operating position.

  Here, as shown in FIGS. 12 and 13, a dog clutch 10 b (blocking means) is integrally formed on the proximal end side of the operating member 10 according to the present embodiment. The dog clutch 10b can block power transmission from the output shaft 3 to the input gear 1 by the one-way clutch 11, and meshes with a fitting surface Ka (see FIG. 10) formed on the one-way clutch 11 (inner member 11a). It has a fitting surface Kb (see FIG. 14).

  That is, when the actuating member 10 is not actuated, as shown in FIG. 17A, the engagement surface Kb of the dog clutch 10b formed on the actuating member 10 is engaged with the engagement surface Ka of the one-way clutch 11 ( When the actuating member 10 is actuated when the one-way clutch 11 transmits power from the output shaft 3 to the input gear 1 and the actuating member 10 is actuated, as shown in FIG. 11, the engagement between the fitting surface Kb and the fitting surface Ka is released, and the power transmission from the output shaft 3 to the input gear 1 by the one-way clutch 11 can be cut off.

  Further, when the clutch housing 2 and the weight housing 12 reach a predetermined rotational speed and the weight member 8 moves from the inner diameter side position toward the outer diameter side position, as shown in FIG. Since the clutch 11 is separated from the dog clutch 10b of the operating member 10, the engagement (fitting) between the fitting surface Ka and the fitting surface Kb is released. As a result, the weight member 8 moves from the inner diameter side position toward the outer diameter side position, whereby the power transmission from the output shaft 3 to the input gear 1 by the one-way clutch 11 can be interrupted.

  In addition, in the present embodiment, the pressure member 5 and the weight housing 12 have an opening (a nut N) for fastening the output member and the clutch member to attach the entire apparatus to the vehicle. An opening 5d of the pressure member 5 and an opening 12b) of the weight housing 12 are formed, and the operating member 10 is attached to the opening 5d of the pressure member 5. In particular, in the present embodiment, an opening through which the nut N for attaching the entire power transmission device to the vehicle (vehicle output shaft 3) can be exposed to the outside is the pressure member 5 and the weight housing 12 as well as the interlocking member 9 (hole 9a). ) And the like, and when the actuating member 10 is removed, the nut N faces the outside through the openings and holes.

  On the other hand, as shown in FIG. 4, the weight housing 12 according to the present embodiment has a plurality of protruding portions 12c that are formed to protrude laterally from the outer peripheral surface thereof, as shown in FIG. The portion 12c is fitted to a predetermined position in the clutch housing 2 and attached to the clutch housing 2, and the wall portion La near the opening side end portion Q of the weight housing 12 and the wall near the opening side end portion P of the clutch housing 2 are attached. The portion Lb is overlapped. Specifically, as shown in FIG. 3, the clutch housing 2 has a plurality of notches 2a in the circumferential direction for fitting the drive side clutch plate 6, and the weight housing 12 is formed in the notches 2a. The protrusion 12c is fitted and assembled so that the outer peripheral surface of the wall portion La near the opening side end portion Q of the weight housing 12 and the inner periphery of the wall portion Lb near the opening side end portion P of the clutch housing 12 are assembled. These walls (La, Lb) are overlapped with each other facing the surface.

  Further, the protruding portion 12c according to the present embodiment is fitted into the notch 2a at a position of a predetermined dimension bottom side (left side in FIG. 2) from the opening side end portion P (opening end surface) of the clutch housing 2, and the clutch The circlip 17 attached to the inner peripheral surface of the housing 2 prevents the detachment. That is, the notch 2a of the clutch housing 2 is fitted with the driven-side clutch plate 7 and the drive-side clutch plate 6 in a stacked state, and the weight housing 12 is disposed on the opening side end P side of the notch 2a. The protruding portion 12c is fitted and fixed by the circlip 17.

Next, the operation of the power transmission device according to this embodiment will be described.
When the engine E of the vehicle is stopped or idling, the driving force of the engine E is not transmitted to the input gear 1 or the rotational speed of the input gear 1 is low. Therefore, as shown in FIG. While being in the side position, the pressure member 5 is in the non-operating position. At this time, the clutch is turned off (the pressure contact between the driving side clutch plate 6 and the driven side clutch plate 7 is released), the one-way clutch 11 is turned off (the state where no power is transmitted), and the dog clutch 10b is turned on (the power is transmitted). Obtained state), the pressure-contact assist cam is turned off, the back torque limiter cam is turned off, and the operating member 10 is not operated.

  When the vehicle starts after the vehicle is stopped or idling, the rotation speed of the input gear 1 shifts from a low rotation to a high rotation (medium rotation range). Therefore, as shown in FIG. Between the position and the outer diameter side position, the pressure member 5 is between the non-actuated position and the actuated position. At this time, the clutch is on (the state where the pressure contact between the driving side clutch plate 6 and the driven side clutch plate 7 is started), the one-way clutch 11 is off (the state where no power is transmitted), and the dog clutch 10b is off (the power is not transmitted). State), the pressure contact assist cam is on, the back torque limiter cam is off, and the operating member 10 is inactive.

  When the vehicle accelerates and travels in a high speed range after the vehicle starts, the rotation speed of the input gear 1 is high, so that the weight member 8 is positioned at the outer diameter side as shown in FIG. The member 5 is in the operating position. At this time, the clutch is on (the state where the driving clutch plate 6 and the driven clutch plate 7 are pressed), the one-way clutch 11 is off (power is not transmitted), and the dog clutch 10b is off (power is not transmitted). State), the pressure contact assist cam is on, the back torque limiter cam is off, and the operating member 10 is inactive.

  When the vehicle shifts in a high speed range, as shown in FIG. 20, the actuating member 10 is actuated to move to the right side in the figure together with the pressure member 5. The weight member 8 is held at the outer diameter side position, and the pressure member 5 is in the non-actuated position. At this time, the clutch is turned off (the pressure contact between the driving side clutch plate 6 and the driven side clutch plate 7 is released), the one-way clutch 11 is turned off (the state where no power is transmitted), and the dog clutch 10b is turned off (the power is not transmitted). State), the pressure contact assist cam is off, the back torque limiter cam is on, and the operating member 10 is in operation.

  When the vehicle decelerates in the low speed range, the rotational speed of the input gear 1 is lower than the rotational speed of the output shaft 3, so that the weight member 8 is positioned at the inner diameter side as shown in FIG. It is in the non-operating position. At this time, the clutch is turned off (the pressure contact between the driving side clutch plate 6 and the driven side clutch plate 7 is released), the one-way clutch 11 is turned on (a state where power can be transmitted), and the dog clutch 10b is turned on (power is transmitted). The pressure assisting cam is off, the back torque limiter cam is off, and the operating member 10 is inactive.

  When the vehicle shifts in the low speed range, the operation member 10 operates as shown in FIG. The weight member 8 is at the inner diameter side position, and the pressure member 5 is at the non-actuated position. At this time, the clutch is turned off (the pressure contact between the driving side clutch plate 6 and the driven side clutch plate 7 is released), the one-way clutch 11 is turned off (the state where no power is transmitted), and the dog clutch 10b is turned off (the power is not transmitted). State), the pressure-contact assist cam is off, the back torque limiter cam is off, and the operating member 10 is in operation.

  Further, when the vehicle runs downhill or starts the engine E with a kick starter, as shown in FIG. 23, the weight member 8 is set to the inner diameter side position, and the pressure member 5 is set to the non-operating position. . At this time, the clutch is turned off (the pressure contact between the driving side clutch plate 6 and the driven side clutch plate 7 is released), the one-way clutch 11 is turned on (a state where power can be transmitted), and the dog clutch 10b is turned on (power is transmitted). The pressure assisting cam is off, the back torque limiter cam is off, and the operating member 10 is inactive.

  According to the present embodiment, when the weight member 8 is at the inner diameter side position, power transmission from the input gear 1 (input member) to the output shaft 3 (output member) is interrupted and the output shaft 3 to the input gear 1 is blocked. The one-way clutch 11 for transmitting the power to be directed and the dog clutch 10b (shut-off means) capable of shutting off the power transmission from the output shaft 3 to the input gear 1 by the one-way clutch 11 are provided. As a result, the engine brake can be generated satisfactorily and the increase in the number of parts can be suppressed.

  In addition, according to this embodiment, when the weight member 8 is at the inner diameter side position, power transmission from the input gear 1 (input member) to the output shaft 3 (output member) is interrupted and input from the output shaft 3 is performed. Since the one-way clutch 11 for transmitting power toward the gear 1 is provided, when the weight member 8 is at the inner diameter side position, the rotational force on the wheel D side can be transmitted to the engine E side to cause engine braking. At the same time, the engine can be started by a kick starter.

  Further, during the traveling of the vehicle, the power transmission from the output shaft 3 (output member) to the input gear 1 (input member) is such that when the weight member 8 is at the outer diameter side position, This is performed by the driven clutch plate 7 and by the one-way clutch 11 when the weight member 8 is at the inner diameter side position. Therefore, the power transmission path from the output shaft 3 toward the input gear 1 can be varied according to the position of the weight member 8, and power transmission from the output shaft 3 toward the input gear 1 can be appropriately performed.

  Furthermore, the one-way clutch 11 according to the present embodiment is attached to the interlocking member 9 and performs power transmission from the output shaft 3 to the input gear 1 via the interlocking member 9 when the weight member 8 is at the inner diameter side position. Therefore, with respect to the interlocking member 9, the function of moving the pressure member 5 from the non-operating position to the operating position and the function of transmitting power from the output shaft 3 to the input gear 1 can be combined.

  In particular, since the dog clutch 10b (shut-off means) is integrally formed with the operating member 10, the movement of the pressure member 5 by the operating member 10 and the interruption of power transmission by the dog clutch 10b at the same time can be performed simultaneously by the same member. The responsiveness of the dog clutch 10b can be further improved. In the present embodiment, the shut-off means is constituted by the dog clutch 10b formed on the operating member 10, so that the power transmission from the output shaft 3 to the input gear 1 by the one-way clutch 11 and the shut-off of the power transmission are reliably performed. Can be made.

  Furthermore, the pressure member 5 according to the present embodiment can have the nut N (fastening means) for fastening the output shaft 3 and the clutch member 4 and attaching the entire device (the power transmission device) to the vehicle facing outside. Since the opening 5d is formed and the operating member 10 is attached to the opening 5d, the fastening can be released by a tool by removing the operating member 10 and exposing the nut N to the outside. The entire apparatus can be removed more easily.

  In particular, in the present embodiment, both the pressure member 5 and the weight housing 12 are formed with openings through which the nut N (fastening means) can be exposed to the outside, and the operating member 10 is attached to the opening 5d of the pressure member 5. Thus, the operation member 10 is removed and the nut N is exposed to the outside, so that the fastening can be released with a tool, and the removal operation of the entire apparatus from the vehicle can be performed more easily.

  Furthermore, the clutch housing 2 according to the present embodiment is composed of a cup-shaped member with a bottom, and the weight housing 12 having the groove portion 12a is attached to the opening side (opening side end portion P side) of the clutch housing 2. The power transmission device in which the weight member 8 is disposed on the opening side of the clutch housing 2 can be provided.

  Further, the operating member 10 according to the present embodiment moves in the axial direction of the pressure member 5 when operated manually or by an actuator, and abuts on the circlip 15 fixed to the pressure member 5 in the moving process. Since the pressure member 5 can be moved in the same direction to change from the non-actuated position to the actuated position, the movement of the actuating member 10 and the movement of the pressure member 5 from the non-actuated position to the actuated position can be easily achieved via the circlip 15 Can be done.

  In addition, according to the present embodiment, the weight housing 12 has the protruding portion 12c that is formed to protrude laterally from the outer peripheral surface thereof, and the protruding portion 12c is fitted in a predetermined position in the clutch housing 2. The wall portion La near the opening side end portion Q of the weight housing 12 and the wall portion Lb near the opening side end portion P of the clutch housing 2 are overlapped with each other. Even in the case where the weight housing 12 accommodating the weight member 8 is attached to the opening side (opening side end portion P side), enlargement in the radial direction and the axial direction can be suppressed.

  Further, the weight housing 12 according to the present embodiment is composed of a cup-shaped member with a bottom, and the protruding portion 12c is fitted at a position of a predetermined dimension bottom side from the opening side end portion P of the clutch housing 2, Even in the case where the weight housing 12 that houses the weight member 8 is attached to the opening side of the clutch housing 2, the increase in size in the radial direction and the axial direction can be suppressed. Particularly, in the clutch housing 2 according to the present embodiment, the notch 2a for fitting the drive side clutch plate 6 is formed, and the protruding portion 12c of the weight housing 12 is fitted to the notch 2a. Both the fitting of the drive side clutch plate 6 and the fitting of the protruding portion 12c of the weight housing 12 can be performed on the notch 2a of the clutch housing 2.

  Furthermore, the weight housing 12 according to the present embodiment has a bulging portion 12e that bulges in the circumferential direction at the opening-side end portion Q, and the bulging portion 12e is formed on the opening side of the clutch housing 2. Since the weight housing 12 is positioned in the radial direction in contact with the mounting surface 2b formed at the end portion P, the movement of the weight member 8 can be more accurately transmitted to the pressure member 5, and the device Reliability can be improved. In particular, the mounting surface 2b according to the present embodiment is formed with a mounting groove 2c into which the circlip 17 can be fitted, and the weight housing 12 can be prevented from being detached by the circlip 17 fitted into the mounting groove 2c. Therefore, the positioning accuracy of the weight housing 12 with respect to the clutch housing 2 can be further improved.

  Further, in the present embodiment, the gradient surface 4a formed on the clutch member 4 and the gradient surface 5a formed on the pressure member 5 are opposed to each other, and the rotational force input to the input gear 1 is the output shaft 3. Since the pressure assisting cam for increasing the pressure contact force between the drive side clutch plate 6 and the driven side clutch plate 7 when the state is ready to be transmitted, the pressure contact associated with the movement of the weight member 8 due to the centrifugal force is provided. In addition to the force, a pressing force by the pressing assist cam can be applied, and the driving side clutch plate 6 and the driven side clutch plate 7 can be pressed and contacted more smoothly and reliably.

  Furthermore, according to the present embodiment, the gradient surface 4 b formed on the clutch member 4 and the gradient surface 5 b formed on the pressure member 5 are opposed to each other, and the rotation of the output shaft 3 is the rotation of the input gear 1. When the clutch member 4 and the pressure member 5 are relatively rotated more than the number, the back torque limiter cam that can release the pressure contact force between the driving side clutch plate 6 and the driven side clutch plate 7 is provided. When the weight member 8 is at the outer diameter side position, it is possible to prevent excessive power from being transmitted to the engine E side via the input gear 1.

  Although the present embodiment has been described above, the present invention is not limited to these embodiments. For example, the blocking means integrally formed with the operating member 10 transmits power from the output shaft 3 to the input gear 1 by the one-way clutch 11. Any other type of blocking means (such as a friction clutch) may be used. Further, the pressure contact assist cam or the back torque limiter cam may not be provided.

  Furthermore, the weight housing 12 according to the present embodiment has a protruding portion 12c that is formed to protrude laterally from the outer peripheral surface thereof, and the protruding portion 12c is fitted into a predetermined position in the clutch housing 2 so that the clutch housing is engaged. Although attached to 2, it is good also as another attachment form. The power transmission device according to the present invention can be applied to various multi-plate clutch type power transmission devices such as two-wheeled vehicles, automobiles, three-wheel or four-wheel buggies, and general-purpose machines.

  When the weight member is at the inner diameter side position, the power transmission from the input member to the output member is interrupted and the power transmission from the output member to the input member is performed, and the output member by the one-way clutch is directed from the output member to the input member As long as the power transmission device is provided with a shut-off means capable of shutting off power transmission and the actuating member is integrally formed with the shut-off means, it is also applicable to a device with a different external shape or with other functions added. can do.

1 Input gear (input member)
2 Clutch housing 2a Notch 3 Output shaft (output member)
4 Clutch members 4a, 4b Gradient surface 4c Center hole 4d Flange surface 4e Outer peripheral side surface 5 Pressure members 5a, 5b Gradient surface 5c Flange surface 5d Opening 6 Drive side clutch plate 7 Driven side clutch plate 8 Weight member 9 Interlocking member 9a Hole 9b Convex Portion 9c accommodating portion 10 actuating member 10a holding portion 10b dog clutch (blocking means)
11 One-way clutch 11a Inner member 11b Retainer member 12 Weight housing 12a Groove portion 12b Opening 12c Projection portion 12d Groove shape 13 Elastic member 14 Belleville spring 15 Circlip 16 Circlip 17 Circlip N Nut (fastening means)
F mounting member E engine D wheel P opening side end

Claims (5)

A clutch housing that is rotated together with an input member that is rotated by a driving force of an engine of the vehicle, and in which a plurality of drive side clutch plates are formed;
A plurality of driven-side clutch plates formed alternately with the driving-side clutch plates of the clutch housing;
A clutch member coupled to an output member capable of rotating a vehicle wheel;
An operating position where the driving clutch plate and the driven clutch plate are brought into pressure contact with each other so that the driving force of the engine can be transmitted to the wheels, and the pressure contact force between the driving clutch plate and the driven clutch plate is released. A pressure member movable between a non-operating position capable of interrupting transmission of the driving force of the engine to the wheels;
It is disposed in a groove extending in the radial direction of the clutch housing, and can be moved from the inner diameter side position of the groove section to the outer diameter side position by centrifugal force accompanying the rotation of the clutch housing, and the inner diameter side A weight member capable of moving the pressure member from the non-operating position to the operating position as it moves from the position to the outer diameter side position;
An actuating member that is actuated manually or by an actuator to move the pressure member from the actuated position to the non-actuated position;
In the power transmission device having
A one-way clutch that interrupts power transmission from the input member to the output member and performs power transmission from the output member to the input member when the weight member is at the inner diameter side position;
A blocking means capable of blocking power transmission from the output member to the input member by the one-way clutch;
And the operating member is integrally formed with the blocking means.   2. The power transmission device according to claim 1, wherein the blocking means is a dog clutch formed on the operating member.   The pressure member is formed with an opening that allows a fastening means for fastening the output member and the clutch member to attach the entire apparatus to the vehicle to face the outside, and the operating member is attached to the opening. The power transmission device according to claim 1 or 2, characterized in that.   The power according to any one of claims 1 to 3, wherein the clutch housing is made of a cup-shaped member having a bottom, and a weight housing having the groove portion is attached to an opening side of the clutch housing. Transmission device.   The actuating member moves in the axial direction of the pressure member when operated manually or by an actuator, and abuts against a circlip fixed to the pressure member in the moving process to move the pressure member in the same direction. The power transmission device according to claim 1, wherein the power transmission device can be changed from a non-operation position to an operation position.

Images