JP6074381B2 - Power transmission device for vehicle - Google Patents

Description

  The present invention relates to a vehicle power transmission device.

  Patent Document 1 discloses a structure in which a general one-way clutch is refueled from within a shaft.

  Patent Document 2 discloses a continuously variable transmission that converts the rotation of the input shaft connected to the engine into the reciprocating motion of the connecting rod, and converts the reciprocating motion of the connecting rod into the rotational motion of the output shaft by a one-way clutch. Has been.

Japanese Patent No. 3507999 Specification JP 2012-1048 A

  For example, as shown in FIG. 10, the one-way clutch used in the conventional continuously variable transmission is basically disposed coaxially with the inner peripheral surface 22 a of the annular outer member 22 and the outer member 22. A roller 25 is disposed in an annular space formed between the cylindrical inner member 23 and an outer circumferential surface that is bent in a wave shape. The roller 25 is urged by an engagement spring 24 fixed to the support rod 33.

  When the one-way clutch transmits torque, the one-way clutch is engaged when the roller 25 is engaged in a wedge-shaped space formed between the inner peripheral surface 22a of the outer member 22 and the outer peripheral surface 23a of the inner member 23. Torque can be transmitted between the outer member 22 and the inner member 23.

  In a state where the engaged state is released, the roller 25 rotates together with the inner member 23, and differential rotation with different rotational speeds occurs between the outer member 22 and the inner member 23. At this time, the contact between the roller 25 and the outer member 22 becomes a sliding resistance, which causes energy loss of the one-way clutch and generates heat.

  Since the connecting rod of the continuously variable transmission power transmission unit reciprocates at a high speed, the one-way clutch repeats engagement and disengagement in a short cycle, and it is required to improve the engagement response. At this time, if the behavior of the roller 25 is not stable due to damping after disengagement, or if the difference in rotational speed increases and the sliding resistance increases, the lack of lubricating oil increases the energy loss of the one-way clutch. Variations in torque transmitted by the one-way clutch can occur.

  When the one-way clutches in the plurality of power transmission units repeat disengagement with different phases, in the configuration in which oil is supplied in the shaft as in Patent Document 1, it is difficult to supply lubricating oil according to the operating state of each one-way clutch. Cases can arise.

  An object of the present invention is to provide a vehicular power transmission device capable of suppressing torque fluctuations by supplying lubricating oil according to the operating state of a one-way clutch.

In order to achieve the above object, the present invention described in claim 1 includes an input shaft (11) connected to a rotating shaft of an engine (E) and an output shaft (12) connected to drive wheels (W). ), An input side fulcrum (18) rotating with the input shaft (11), and a one-way clutch connected to the output shaft (12). 21), an output side fulcrum (19c) provided on the outer peripheral member (22) of the one-way clutch (21), and both ends of the input side fulcrum (18) and the output side fulcrum (19c), A vehicular power transmission device comprising: a connecting rod (19) that reciprocates according to the amount of eccentricity; and a speed change actuator (14) that changes the amount of eccentricity,
The one-way clutch (21)
An inner peripheral member (23) that is coaxially rotatable inside the outer peripheral member (22) and is connected to the output shaft (12), and the outer peripheral member (22) and the inner peripheral member (23). A plurality of rolling elements (25) that roll between,
The inner circumferential member (23)
An output shaft outer peripheral member (61) disposed on the outer peripheral side with respect to the output shaft (12) and formed with a rolling surface of the rolling element (25), the output shaft (12), and the output shaft outer peripheral member An output shaft inner peripheral member (71) disposed between the output shaft outer peripheral member (61) and transmitting the rotation of the output shaft outer peripheral member (61) to the output shaft (12),
The output shaft outer peripheral member (61) is disposed so as to be rotatable relative to the output shaft inner peripheral member (71) in accordance with the operation of the one-way clutch (21), and the output shaft outer peripheral member ( 61) and the convex portion (73) formed in the output shaft inner circumferential member (71) are formed with a space capable of storing lubricating oil. In addition, the output shaft outer peripheral member (61) communicates with the space, and can supply the lubricating oil to the rolling surface by the rotation of the output shaft outer peripheral member (61). ) Is provided. A vehicle power transmission device is proposed.

  In addition to the configuration of claim 1, the present invention as set forth in claim 2 is characterized in that the supply oil passage (63) is configured so that the space is narrowed by the rotation of the output shaft outer peripheral member (61). A vehicle power transmission device is proposed in which the lubricating oil is supplied to the rolling surface.

  Further, in the present invention described in claim 3, in addition to the configuration of claim 1 or 2, the convex portion (64, 75) of the output shaft outer peripheral member (61) or the output shaft inner peripheral member (71). Lubricating oil is provided by recesses formed by disposing two convex portions (73, 74, 65, 66) of the output shaft inner peripheral member (71) or the output shaft outer peripheral member (61) on both sides of the output shaft. A space (81, 82) that can be stored is formed, and communicates with a space (82) formed between one convex portion (73, 65) of the concave portion and the convex portion (64, 75). The supply oil passage (63) is formed in the output shaft outer peripheral member (61), and is formed between the other convex portion (74, 66) of the concave portion and the convex portion (64, 75). The suction oil passage (75) that communicates with the space (81) and sucks the lubricating oil has an inner periphery of the output shaft. Vehicle power transmission apparatus characterized by being configured to wood (71) is proposed.

  Further, in the present invention described in claim 4, in addition to the configuration of claim 3, the output shaft inner peripheral member (71) is provided on both sides of the convex portion (64) of the output shaft outer peripheral member (61). Spaces (81, 82) in which lubricating oil can be stored are formed by the concave portions formed by arranging the two convex portions (73, 74), and one of the output shaft inner peripheral members (71) is formed. The supply oil passage (63) communicates with a space (82) formed between the convex portion (73) and the convex portion (64) of the output shaft outer peripheral member (61) so that the supply oil passage (63) is connected to the output shaft outer peripheral member (61). And communicated with a space (81) formed between the other convex portion (74) of the output shaft inner peripheral member (71) and the convex portion (64) of the output shaft outer peripheral member (61). The suction oil passage (75) for sucking the lubricating oil is configured in the output shaft inner peripheral member (71). Power transmission device is proposed for a vehicle.

  According to a fifth aspect of the present invention, in addition to the configuration of the fourth aspect, between the inner peripheral surface (22a) of the outer peripheral member (22) and the rolling surface of the output shaft outer peripheral member (61). When the engagement of the one-way clutch (21) is released by releasing the rolling element (25) from the wedge-shaped space formed in the supply oil passage (63), the supply oil passage (63) is connected to the output shaft outer peripheral member (61). The vehicle power transmission device is proposed in which the lubricating oil is supplied to the rolling surface in response to the space (82) becoming narrow due to the rotation of).

  Further, in the present invention described in claim 6, in addition to the configuration of claim 5, when the engagement of the one-way clutch (21) is released, the suction oil passage (75) is connected to the outer periphery of the output shaft. A vehicle power transmission device is proposed in which the lubricating oil is sucked into the space (81) in response to the space (81) being widened by the rotation of the member (61).

  In addition, in the present invention described in claim 7, in addition to the configuration of claim 3, the output shaft outer peripheral member (61) is provided on both sides of the convex portion (76) of the output shaft inner peripheral member (71). Spaces (81, 82) in which lubricating oil can be stored are formed by the concave portions formed by arranging the two convex portions (65, 66), and one convex portion of the output shaft outer peripheral member (61) is formed. The supply oil passage (63) communicates with a space (82) formed between the portion (65) and the convex portion (75) of the output shaft inner peripheral member (71), and the supply oil passage (63) is connected to the output shaft outer peripheral member (61). And communicates with a space (81) formed between the other convex portion (66) of the output shaft outer peripheral member (61) and the convex portion (76) of the output shaft inner peripheral member (71). The suction oil passage (75) for sucking the lubricating oil is configured in the output shaft inner peripheral member (71). Power transmission device is proposed for a vehicle.

  Further, in the present invention described in claim 8, in addition to the configuration of claim 7, the inner peripheral surface (22a) of the outer peripheral member (22) and the rolling surface of the output shaft outer peripheral member (61). When the one-way clutch (21) is engaged by the rolling element (25) biting into a wedge-shaped space formed therebetween, the supply oil passage (63) is connected to the output shaft outer peripheral member (61). A vehicle power transmission device is proposed in which the lubricating oil is supplied to the rolling surface in response to the space (82) being narrowed by rotation.

  In the present invention described in claim 9, in addition to the configuration of claim 8, when the one-way clutch (21) is engaged, the suction oil passage (75) is connected to the output shaft outer peripheral member (61). The vehicle power transmission device is proposed in which the lubricating oil is sucked into the space (81) in response to the space (81) becoming wider due to the rotation of the motor.

  In the present invention described in claim 10, in addition to the configuration of any one of claims 1 to 9, a plurality of one-way clutches (21) are connected to the output shaft (12), The output shaft outer peripheral member (61) is disposed in each of the plurality of one-way clutches (21), and the output shaft inner peripheral member (71) is a common member with respect to the plurality of one-way clutches (21). A vehicle power transmission device is proposed in which the rotation of the plurality of output shaft outer peripheral members (61) is transmitted to the output shaft inner peripheral member (71).

  According to the configuration of the first and second aspects, by supplying the lubricating oil according to the operation state of the one-way clutch, it is possible to stabilize the behavior of the roller and suppress the torque fluctuation.

  According to the third aspect of the present invention, when the one-way clutch is engaged or disengaged, the impact applied to the roller can be reduced, and the generation of vibration and noise can be reduced.

  According to the fourth to sixth aspects of the present invention, as the operating state of the one-way clutch, the lubricating oil is supplied from the supply oil passage when the one-way clutch is disengaged, so that the behavior of the roller is stabilized and the torque is increased. It becomes possible to suppress fluctuations.

  According to the seventh to ninth aspects of the present invention, as the operation state of the one-way clutch, the lubricating oil is supplied from the supply oil passage when the one-way clutch is engaged, so that the behavior of the roller is stabilized and the torque fluctuation Can be suppressed.

  According to the configuration of the tenth aspect, it is possible to stabilize the behavior of the roller and suppress the torque fluctuation by supplying the lubricating oil at a timing suitable for the operating state of the plurality of one-way clutches.

The skeleton figure of the power transmission device for vehicles. FIG. 2 is a detailed view of part 2 of FIG. 1. FIG. 3 is a sectional view taken along line 3-3 in FIG. 2 (TOP state). FIG. 3 is a sectional view taken along line 3-3 in FIG. 2 (LOW state). The action explanatory view in the TOP state. The action explanatory view in the LOW state. The disassembled perspective view of a one-way clutch. The figure explaining the state change of a one-way clutch. The figure explaining the structure of the one-way clutch which concerns on embodiment. The figure explaining the structure of the one-way clutch which concerns on embodiment. The figure which illustrates the conventional one-way clutch. The figure which illustrates the structure of the modification of a supply oil path.

  Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to FIGS. However, the components described in this embodiment are merely examples, and the technical scope of the present invention is determined by the scope of the claims, and is not limited by the following individual embodiments. Absent.

  With reference to FIG. 1, the structure of the power train of the motor vehicle in which the vehicle power transmission device of this embodiment is mounted will be described. As shown in FIG. 1, the vehicle power transmission device for transmitting the driving force of the engine E to the drive wheels W, W via the left and right axles 10, 10 includes a crank type continuously variable transmission T and a differential gear D. Prepare. The continuously variable transmission T shifts the rotation of the input shaft 11 connected to the rotation shaft of the drive source and transmits it to the output shaft 12.

  Next, the structure of the continuously variable transmission T will be described with reference to FIGS. 2 to 7A and 7B. As shown in FIG. 2, the continuously variable transmission T according to the present embodiment has a plurality of power transmission units U having the same structure (six examples are illustrated in the embodiment) stacked in the axial direction. It is a thing. These power transmission units U include a common input shaft 11 and a common output shaft 12 arranged in parallel, and the rotation of the input shaft 11 is decelerated or increased and transmitted to the output shaft 12.

  Hereinafter, the structure of one power transmission unit U will be described as a representative. The input shaft 11 connected to the engine E and rotates passes through the hollow rotating shaft 14a of the speed change actuator 14 such as an electric motor so as to be relatively rotatable. The rotor 14b of the speed change actuator 14 is fixed to the rotating shaft 14a, and the stator 14c is fixed to the casing. The rotation shaft 14 a of the speed change actuator 14 can rotate at the same speed as the input shaft 11 and can rotate relative to the input shaft 11 at a different speed.

  A first pinion 15 is fixed to the input shaft 11 passing through the rotation shaft 14 a of the speed change actuator 14, and a crank-shaped carrier 16 is connected to the rotation shaft 14 a of the speed change actuator 14 so as to straddle the first pinion 15. The Two second pinions 17, 17 having the same diameter as the first pinion 15 are supported via pinion pins 16 a, 16 a at positions forming an equilateral triangle in cooperation with the first pinion 15, respectively. The first pinion 15 and the second pinions 17 and 17 mesh with a ring gear 18a formed eccentrically inside a disc-shaped eccentric disk 18 (input side fulcrum). A ring portion 19 b provided at one end of the rod portion 19 a of the connecting rod 19 is fitted to the outer peripheral surface of the eccentric disk 18 via a ball bearing 20 so as to be relatively rotatable.

  A one-way clutch 21 provided on the outer periphery of the output shaft 12 includes a ring-shaped outer member 22 pivotally supported on a rod portion 19 a of a connecting rod 19 via a pin 19 c (output-side fulcrum), and an inner portion of the outer member 22. An inner member 23 disposed and fixed to the output shaft 12, and a roller 25 disposed in a wedge-shaped space formed between the outer member 22 and the inner member 23 and biased by an engagement spring 24 (elastic member). With. The inner member 23 of the one-way clutch 21 according to this embodiment is divided into an output shaft outer peripheral member 61 and an output shaft inner peripheral member 71. The specific structure of the one-way clutch 21 will be described in detail later with reference to FIGS.

  Next, the structure of the one-way clutch and the state change of the one-way clutch will be described with reference to FIGS. 7A and 7B.

  As shown in FIG. 7A, the one-way clutch 21 of the present embodiment basically includes a circular inner peripheral surface 22 a of an annular outer member 22 and a cylindrical inner member disposed coaxially within the outer member 22. The roller 25 is disposed in an annular space formed between the outer circumferential surface 23a (rolling surface) that bends in a wavy shape. In order to form a wedge-shaped space with which the roller 25 engages between the inner peripheral surface 22a of the outer member 22 and the outer peripheral surface 23a of the inner member 23, the outer peripheral surface 23a (rolling) Surface) has a peripheral surface inclined with respect to the circular inner peripheral surface 22a of the outer member 22.

  An annular groove 22c is formed in the inner peripheral surface 22a of the outer member 22, and an annular ring spring 39 is disposed in the annular groove 22c. The ring spring 39 abuts on the circumferential surface of the roller 25 and urges toward the outer circumferential surface 23 a of the inner member 23.

  The connecting rod 19 is connected to protrusions 22b, 22b provided on the outer periphery of the outer member 22 via pins 19c and clips 40, 40. The output shaft 12 is coupled to the inner peripheral portion of the inner member 23 so as not to be relatively rotatable.

  The one-way clutch 21 includes an engagement spring 24 that urges the roller 25 in the circumferential direction of the annular space, and a support rod 33 that supports the engagement spring 24. The support rod 33 is fixed to inner races of ball bearings 34 and 34 (angular bearings).

  The engagement spring 24 is composed of a single elastic plate, and one end side of the engagement spring 24 is fixed to the support rod 33 by welding or the like, and a biasing portion that biases the roller 25 is formed on the other end side. When the urging portion comes into contact with the roller 25, the engagement spring 24 generates a pressing force. The roller 25 is biased by the pressing force of the engagement spring 24, and the engagement spring 24 pushes the roller 25 back to a position indicating a state immediately before the one-way clutch is engaged. The roller 25 can roll on the outer peripheral surface 23 a (rolling surface) of the inner member 23 by the urging force of the engagement spring 24.

  Between the outer member 22 and the inner member 23, a pair of ball bearings 34, 34 located on both sides in the axial direction of the roller 25 are disposed, and the outer member 22 and the inner member 23 are the same by the ball bearings 34, 34. It is connected so that relative rotation is possible while maintaining the core state. The inner race 36 of the ball bearings 34, 34 constitutes a housing member for housing the roller 25. On the side surface of the inner race 36 of the ball bearing 34, a lubricating hole 50 for supplying lubricating oil between the roller 25 and the outer member 22 is provided in parallel with the axial direction of the output shaft 12. From the lubrication hole 50 at the reference position where the roller 25 (rolling element) starts engagement between the outer member 22 (outer peripheral member) and the inner member 23 (inner peripheral member) (position in the Data Point state: DP position). Lubricating oil can be supplied between the roller 25 (rolling element) and the outer member 22 (outer peripheral member).

  The inner member 23 is held by the outer member 22 by shims and clips arranged on both sides of the ball bearings 34, 34.

  The ball bearing 34 has a plurality of balls 37 disposed between an outer ring 35 and an inner ring (inner race) 36. The outer ring 35 is formed at the axial end of the outer member 22, and the inner ring (inner race) 36 is formed of a separate member and is fixed to the outer periphery of the inner member 23. There are two types of ball bearings 34, one is a single row, and the two ball bearings 34, 34 located at both axial ends of the six one-way clutch 21 are a single row, and the other balls Since the bearing 34 is shared by the two adjacent one-way clutches 21 and 21, it becomes a double row.

  In the two single-row ball bearings 34, 34 positioned at both axial ends of the one-way clutch 21 and the other double-row ball bearings 34, the roller 25, the outer member 22, In between, a lubricating hole 50 for supplying lubricating oil is provided. The lubricating hole 50 constitutes an oil supply structure for supplying lubricating oil to a contact portion where the amount of heat generated increases due to contact between the roller 25 and the outer member 22.

  An axial spring 38 is disposed between one ball bearing 34 and the other ball bearing 34, and a plurality of protrusions 38 a protruding from the inner periphery of the axial spring 38 abuts elastically on the end surface of the roller 25. .

  Next, referring to FIG. 7B, the state change of the one-way clutch 21 will be described. FIG. 7B (A) shows a DP (Datum Point) state of the one-way clutch 21, that is, a state immediately before the one-way clutch 21 is engaged (engagement start state). The DP position is a reference point for starting engagement at which the roller 25 starts engaging. Hereinafter, the DP position is also referred to as an engagement start point (reference point). In the DP state, the urging portion of the engagement spring 24 abuts on the outer peripheral surface of the roller 25 and urges the roller 25 in a direction to be engaged between the inner peripheral surface 22 a of the outer member 22 and the outer peripheral surface 23 a of the inner member 23. At this time, the one-way clutch 21 is not yet engaged, and the roller 25 is in contact with the inner peripheral surface 22a of the outer member 22 and the outer peripheral surface 23a of the inner member 23 without being engaged.

  When the outer member 22 rotates relative to the inner member 23 in the direction of arrow A from this DP state, the roller 25 is subjected to the arrow A by the biasing force received from the engagement spring 24 and the frictional force received from the outer member 22 and the inner member 23. The one-way clutch 21 is engaged as shown in FIG. 7B by moving in the direction and engaging in a wedge-shaped space between the inner peripheral surface 22a of the outer member 22 and the outer peripheral surface 23a of the inner member 23.

  When the outer member 22 rotates relative to the inner member 23 in the arrow B direction from the engaged state of the one-way clutch 21 shown in FIG. 7B (B), the roller 25 is caused by the frictional force received from the outer member 22 and the inner member 23. 7B (C) by moving in the direction of arrow B against the urging force received from the engagement spring 24 and detaching from the wedge-shaped space between the inner peripheral surface 22a of the outer member 22 and the outer peripheral surface 23a of the inner member 23. As shown, the one-way clutch 21 is disengaged. This state is called a damping state, and the roller 25 rotates in the direction of arrow B while compressing the urging portion 24a of the engagement spring 24. The roller 25 moves from the inner peripheral surface 22a of the outer member 22 or the outer peripheral surface 23a of the inner member 23. Get away. Thereafter, the roller 25 is urged by the engagement spring 24 and quickly returns to the DP state shown in FIG. 7B (A).

  Next, with reference to FIG. 3 thru | or FIG. 6, the power transmission effect | action of the continuously variable transmission of this embodiment is demonstrated. First, the operation of one power transmission unit U of the continuously variable transmission T will be described. When the rotation shaft 14 a of the speed change actuator 14 is rotated relative to the input shaft 11, the carrier 16 rotates about the axis L <b> 1 of the input shaft 11. At this time, the center O of the carrier 16, that is, the center of the equilateral triangle formed by the first pinion 15 and the two second pinions 17, 17 rotates around the axis L 1 of the input shaft 11.

  3 and 5 show a state in which the center O of the carrier 16 is on the opposite side of the output shaft 12 with respect to the first pinion 15 (that is, the input shaft 11). The eccentricity is maximized and the ratio of the continuously variable transmission T is in the TOP state. 4 and 6 show a state in which the center O of the carrier 16 is on the same side as the output shaft 12 with respect to the first pinion 15 (that is, the input shaft 11). The amount of eccentricity is minimized and the ratio of the continuously variable transmission T is in the LOW state.

  In the TOP state shown in FIG. 5, when the input shaft 11 is rotated by the engine E and the rotation shaft 14 a of the speed change actuator 14 is rotated at the same speed as the input shaft 11, the input shaft 11, the rotation shaft 14 a, the carrier 16, With the one pinion 15, the two second pinions 17 and 17, and the eccentric disk 18 being integrated, the pinion 15 rotates eccentrically around the input shaft 11 (see arrow A). While rotating from the state shown in FIG. 5A to the state shown in FIG. 5C, a ring portion 19b is supported on the outer periphery of the eccentric disk 18 via the ball bearing 20 so as to be relatively rotatable. The connecting rod 19 rotates the outer member 22 pivotally supported by the pin 19c at the tip of the rod portion 19a in the counterclockwise direction (see arrow B). 5A and 5C show both ends of rotation of the outer member 22 in the arrow B direction.

  When the outer member 22 rotates in the direction of arrow B in this manner, the roller 25 is engaged in the wedge-shaped space between the outer member 22 and the inner member 23 of the one-way clutch 21, and the rotation of the outer member 22 is performed via the inner member 23. Since it is transmitted to the output shaft 12, the output shaft 12 rotates counterclockwise (see arrow C).

  When the input shaft 11 and the first pinion 15 further rotate, the eccentric disk 18 in which the ring gear 18a is engaged with the first pinion 15 and the second pinion 17, 17 rotates eccentrically in the counterclockwise direction (see arrow A). While rotating from the state shown in FIG. 5C to the state shown in FIG. 5A, a ring portion 19b is supported on the outer periphery of the eccentric disk 18 via the ball bearing 20 so as to be relatively rotatable. The connecting rod 19 rotates the outer member 22 pivotally supported by a pin 19c at the tip of the rod portion 19a in the clockwise direction (see arrow B '). 5C and 5A show both ends of rotation of the outer member 22 in the direction of arrow B ′.

  When the outer member 22 rotates in the direction of the arrow B ′ in this way, the roller 25 is pushed out from the wedge-shaped space between the outer member 22 and the inner member 23 while compressing the engagement spring 24, so that the outer member 22 is The output shaft 12 does not rotate by slipping with respect to the inner member 23.

  As described above, when the outer member 22 reciprocates, the output shaft 12 rotates counterclockwise (see arrow C) only when the rotation direction of the outer member 22 is counterclockwise (see arrow B). The shaft 12 rotates intermittently.

  FIG. 6 shows the operation when the continuously variable transmission T is operated in the LOW state. At this time, since the position of the input shaft 11 coincides with the center of the eccentric disk 18, the eccentric amount of the eccentric disk 18 with respect to the input shaft 11 becomes zero. In this state, when the input shaft 11 is rotated by the engine E and the rotating shaft 14a of the speed change actuator 14 is rotated at the same speed as the input shaft 11, the input shaft 11, the rotating shaft 14a, the carrier 16, the first pinion 15, 2 In a state where the second pinions 17 and 17 and the eccentric disk 18 are integrated, the input pin 11 is rotated eccentrically in the counterclockwise direction (see arrow A). However, since the eccentric amount of the eccentric disk 18 is zero, the stroke of the reciprocating motion of the connecting rod 19 is also zero, and the output shaft 12 does not rotate.

  Therefore, if the speed change actuator 14 is driven and the position of the carrier 16 is set between the TOP state of FIG. 3 and the LOW state of FIG. 4, operation at an arbitrary ratio between the zero ratio and the predetermined ratio becomes possible.

  In the continuously variable transmission T, the phases of the eccentric disks 18 of the six power transmission units U juxtaposed are shifted from each other by 60 °, so that the six power transmission units U alternately transmit the driving force. In other words, any one of the six one-way clutches 21 is always in an engaged state, so that the output shaft 12 can be continuously rotated.

  Next, the structure of the one-way clutch 21 will be described with reference to FIGS. FIG. 8 is a cross-sectional view of the outer member 22, the roller 25, and the inner member 23 of the one-way clutch 21 when six power transmission units U are overlapped in the axial direction. The inner member 23 is disposed on the outer peripheral side with respect to the output shaft 12, the output shaft outer peripheral member 61 on which the rolling surface of the roller 25 is formed, and the output shaft inner portion disposed on the inner peripheral side with respect to the output shaft 12. The structure is divided into a peripheral member 71.

  The output shaft inner peripheral member 71 is disposed between the output shaft 12 and the output shaft outer peripheral member 61, and transmits the rotation of the output shaft outer peripheral member 61 to the output shaft 12. The output shaft outer peripheral member 61 is disposed so as to be rotatable relative to the output shaft inner peripheral member 71 in accordance with the operation of the one-way clutch 21.

  The output shaft outer peripheral member 61 is a member arranged separately for each of the power transmission units U. The output shaft inner peripheral member 71 is a common member for the six power transmission units U, and is a member disposed in a state of penetrating the six power transmission units U in the lateral direction. The output shaft inner peripheral member 71 is formed with a convex portion 73 between each output shaft outer peripheral member 61.

  The spacer 80 is arranged on the side surfaces of the convex portions of the output shaft outer peripheral member 61 and the output shaft inner peripheral member 71, and the side surfaces of the convex portions of the output shaft outer peripheral member 61 and the output shaft inner peripheral member 71 are separated by the spacer 80. It has been.

  FIGS. 9A and 9B are side views showing the positional relationship between the outer member 22, the roller 25, and the inner member 23 (the output shaft outer peripheral member 61 and the output shaft inner peripheral member 71). 9A and 9B, the one-way clutch 21 is engaged (engaged state) when the roller 25 rotates and moves to the left side of the page. On the other hand, when the roller 25 rotates and moves to the right side of the page, the one-way clutch 21 is disengaged (disengaged state). Assume that the configurations shown in FIGS. 9A and 9B are similarly configured for each roller 25. 9A and 9B, the engagement spring 24 is arranged as shown in FIG. 7B, although the engagement spring is not clearly shown in order to clarify the configuration of the outer member 22 and the inner member 23. It shall be.

(First embodiment)
In the present embodiment, a configuration in which lubricating oil is supplied from the supply oil passage 63 when the one-way clutch 21 is disengaged will be described. FIG. 9A is a diagram illustrating a configuration of the inner member 23 according to the first embodiment. The output shaft outer peripheral member 61 is formed with a supply oil passage 63 for supplying lubricating oil. The output shaft outer peripheral member 61 has a peripheral surface (rolling surface) that is inclined with respect to the circular inner peripheral surface 22 a of the outer member 22. This peripheral surface corresponds to the outer peripheral surface 23a (rolling surface) described in FIG. 7A.

  A plurality of convex portions 73 and 74 are formed upward on the output shaft inner peripheral member 71, and a convex portion 64 is formed downward on the output shaft outer peripheral member 61. The convex portion 64 of the output shaft outer peripheral member 61 is disposed in the concave space between the convex portions 73 and 74 of the output shaft inner peripheral member 71. A first space 81 is formed between the convex portion 74 of the output shaft inner peripheral member 71 and the convex portion 64 of the output shaft outer peripheral member 61, and the convex portion 73 and the convex portion 64 of the output shaft inner peripheral member 71 are formed. A second space 82 is formed between them.

  The spacer 80 is disposed on the side surfaces of the convex portion 64 of the output shaft outer peripheral member 61 and the convex portions 73 and 74 of the output shaft inner peripheral member 71. The first space 81 is a space (substantially sealed space) surrounded by the convex portions 74, the convex portions 64, and the spacers 80 disposed on both side surfaces. The second space 82 is a space (substantially sealed space) surrounded by the convex portions 64, the convex portions 73, and the left and right spacers 80. The first space 81 and the second space 82 function as an oil reservoir space in which lubricating oil can be stored. The sizes of the first space 81 and the second space 82 are variable depending on the relative positional relationship between the output shaft inner peripheral member 71 and the output shaft outer peripheral member 61.

  A suction oil passage 75 for sucking the lubricating oil supplied in the shaft from the oil pump into the first space 81 is formed in the vicinity of the right lower end portion of the convex portion 74 of the output shaft inner peripheral member 71. Lubricating oil sucked from the suction oil passage 75 is stored in the first space 81. A gap 83 is formed between the tip of the convex portion 64 of the output shaft outer peripheral member 61 and the output shaft inner peripheral member 71, and the first space 81 and the second space 82 communicate with each other through the gap 83. doing.

  When the outer member 22 of the one-way clutch 21 rotates counterclockwise (leftward in the drawing), the roller 25 that contacts the inner peripheral surface 22a of the outer member 22 also rotates counterclockwise. At this time, the roller 25 engages with the wedge-shaped space between the inner peripheral surface 22a of the outer member 22 and the peripheral surface (outer peripheral surface 23a) of the output shaft outer peripheral member 61 of the inner member 23, whereby the one-way clutch 21 is engaged. Match.

  The output shaft outer peripheral member 61 is urged in the circumferential direction by the engagement of the roller 25 and moves. When the convex portion 64 of the output shaft outer peripheral member 61 comes into contact with the convex portion 74 of the output shaft inner peripheral member 71 due to the movement of the output shaft outer peripheral member 61 in the circumferential direction, the output shaft inner peripheral member 71 is biased in the circumferential direction. And move. In this way, the rotation of the outer member 22 is transmitted to the output shaft outer peripheral member 61 and the output shaft inner peripheral member 71 of the inner member 23.

  As the convex portion 64 of the output shaft outer peripheral member 61 and the convex portion 74 of the output shaft inner peripheral member 71 approach each other, the first space 81 becomes narrower, and the lubricating oil accumulated in the first space 81 forms a gap 83. Through the second space 82. The lubricating oil collected in the first space 81 in a state where the convex portion 64 and the convex portion 74 are in contact with each other is in a state where it is accumulated in the second space 82.

  When the outer member 22 rotates in the clockwise direction from the engaged state of the one-way clutch 21, the roller 25 also moves in the clockwise direction by the frictional force received from the output shaft outer peripheral member 61 of the outer member 22 and the inner member 23. By disengaging from the space, the one-way clutch 21 is disengaged.

  At this time, the output shaft outer peripheral member 61 is urged and moved in the clockwise direction by the frictional force received from the roller 25 when the engagement is released. As the convex portion 64 of the output shaft outer peripheral member 61 approaches the convex portion 73 of the output shaft inner peripheral member 71, the lubricating oil that has accumulated in the second space 82 passes through the supply oil passage 63 and then the outer member 22. And the space between the inner member 23 and the inner member 23. The supply oil path 63 supplies lubricating oil to the rolling surface in response to the second space 82 becoming narrow due to the rotation of the output shaft outer peripheral member 61. The supply port 69 (outlet) of the supply oil passage 63 is located on the lower end side of the inclined peripheral surface of the output shaft outer peripheral member 61, and the lubricating oil supplied from the supply oil passage 63 is in a region near the supply port 69. Accumulate. The supply port 69 in the rolling surface can be provided in a place where a surface pressure load on the rolling surface does not act when the roller 25 is engaged. For example, it may be in a range from the reference position (FIG. 7B (A)) where engagement is started to the position on the engagement release side on the lower end side of the inclined peripheral surface of the output shaft outer peripheral member 61.

  At this time, the distance between the convex portion 64 of the output shaft outer peripheral member 61 and the convex portion 74 of the output shaft inner peripheral member 71 that are in contact or close to each other is separated, and the first space 81 is widened. Lubricating oil is stored in the first space 81 via 75. A pressure drop occurs in the first space 81 due to an operation in which the relative distance between the convex portion 64 and the convex portion 74 is increased, and the lubricating oil is easily sucked into the first space 81 through the suction oil passage 75.

  The disengaged roller 25 rotates in the clockwise direction. At this time, the roller 25 is immersed in the lubricating oil accumulated in the vicinity of the supply port 69, and the movement of the roller 25 is attenuated. Thereby, the impact at the time of the roller 25 contacting with the engagement spring 24 can be reduced, and the movement of the roller 25 can be stabilized. Thereafter, the roller 25 is urged by the engagement spring 24 as shown in FIG. 7B (A), and returns to the reference position (FIG. 7B (A)) where engagement is started.

  Lubricating oil collected in the vicinity of the supply port 69 is supplied into the space between the outer member 22 and the output shaft outer peripheral member 61 by centrifugal force when the inner peripheral member moves in the circumferential direction. The lubrication effect in the contact between the roller 25 and the inner peripheral surface 22a of the outer member 22 can be improved.

  According to this embodiment, by supplying lubricating oil according to the operating state of the one-way clutch 21, the behavior of the roller 25 when the one-way clutch 21 is engaged and when the engagement is released is stabilized, and torque fluctuation is suppressed. It becomes possible to do. When the one-way clutch 21 is engaged and released, the impact applied to the roller 25 can be reduced, and the generation of vibration and noise can be reduced.

  Further, by supplying the lubricating oil at a timing suitable for the operating state of the plurality of one-way clutches, it becomes possible to stabilize the behavior of the roller and suppress torque fluctuation.

(Second Embodiment)
In the present embodiment, a configuration in which lubricating oil is supplied from the supply oil passage 63 when the one-way clutch 21 is engaged will be described. FIG. 9B is a diagram illustrating a configuration of the inner member 23 according to the second embodiment. The output shaft outer peripheral member 61 is formed with a supply oil passage 63 for supplying lubricating oil. The output shaft outer peripheral member 61 has a peripheral surface (rolling surface) that is inclined with respect to the circular inner peripheral surface 22 a of the outer member 22. This peripheral surface corresponds to the outer peripheral surface 23a (rolling surface) described in FIG. 7A.

  The output shaft inner peripheral member 71 has a convex portion 76 formed upward, and the output shaft outer peripheral member 61 has a plurality of convex portions 65 and 66 formed downward. The convex portion 76 of the output shaft inner peripheral member 71 is disposed in the concave space between the convex portions 65 and 66 of the output shaft outer peripheral member 61. A first space 81 is formed between the convex portion 66 of the output shaft outer peripheral member 61 and the convex portion 76 of the output shaft inner peripheral member 71, and the convex portion 65 of the output shaft outer peripheral member 61 and the output shaft inner peripheral member 71 are formed. A second space 82 is formed between the convex portion 76.

  The spacer 80 is disposed on the side surfaces of the convex portions 65 and 66 of the output shaft outer peripheral member 61 and the convex portion 76 of the output shaft inner peripheral member 71. The first space 81 is a space (substantially sealed space) surrounded by the protrusions 76, the protrusions 66, and the spacers 80 disposed on both side surfaces. The second space 82 is a space (substantially sealed space) surrounded by the convex portions 65, the convex portions 76, and the spacers 80 arranged on both side surfaces. The first space 81 and the second space 82 function as an oil reservoir space in which lubricating oil can be stored. The sizes of the first space 81 and the second space 82 are variable depending on the relative positional relationship between the output shaft inner peripheral member 71 and the output shaft outer peripheral member 61.

  A suction oil passage 75 for sucking the lubricating oil supplied from the oil pump into the shaft into the first space 81 is formed in the vicinity of the lower left end portion of the convex portion 76 of the output shaft inner peripheral member 71. Lubricating oil sucked from the suction oil passage 75 is stored in the first space 81.

  A gap 83 is formed between the tip end of the convex portion 76 of the output shaft inner peripheral member 71 and the output shaft outer peripheral member 61, and the first space 81 and the second space 82 communicate with each other through the gap 83. doing.

  When the outer member 22 rotates in the clockwise direction from the engaged state of the one-way clutch 21, the roller 25 also moves in the clockwise direction by the frictional force received from the output shaft outer peripheral member 61 of the outer member 22 and the inner member 23. By disengaging from the space, the one-way clutch 21 is disengaged.

  At this time, the output shaft outer peripheral member 61 is urged and moved in the clockwise direction by the frictional force received from the roller 25 when the engagement is released. As the convex portion 66 of the output shaft outer peripheral member 61 and the convex portion 76 of the output shaft inner peripheral member 71 approach each other, the lubricating oil accumulated in the first space 81 enters the second space 82 via the gap 83. Flows in. The lubricating oil accumulated in the first space 81 in a state where the convex portion 66 and the convex portion 76 are in contact with each other is in a state where it is accumulated in the second space 82.

  Next, when the outer member 22 of the one-way clutch rotates counterclockwise (leftward in the drawing), the roller 25 that contacts the inner peripheral surface 22a of the outer member 22 also rotates counterclockwise. At this time, the roller 25 engages with the wedge-shaped space between the inner peripheral surface 22a of the outer member 22 and the peripheral surface (outer peripheral surface 23a) of the output shaft outer peripheral member 61 of the inner member 23, whereby the one-way clutch 21 is engaged. Match.

  The output shaft outer peripheral member 61 is urged in the circumferential direction by the engagement of the roller 25 and moves. When the convex portion 65 of the output shaft outer peripheral member 61 approaches the convex portion 76 of the output shaft inner peripheral member 71 due to the movement of the output shaft outer peripheral member 61 in the circumferential direction, the second space 82 becomes narrower and the second space 82. The lubricating oil accumulated in the oil is supplied to the space between the outer member 22 and the inner member 23 through the supply oil passage 63. The supply oil passage 63 supplies the front lubricating oil to the rolling surface in response to the second space 82 being narrowed by the rotation of the output shaft outer peripheral member 61. The supply port 69 (outlet) of the supply oil passage 63 is located on the lower end side of the inclined peripheral surface of the output shaft outer peripheral member 61, and the lubricating oil supplied from the supply oil passage 63 is in a region near the supply port 69. Accumulate.

  At this time, the interval between the convex portion 66 of the output shaft outer peripheral member 61 and the convex portion 76 of the output shaft inner peripheral member 71 that are in contact or close to each other is separated, and the first space 81 is widened. Lubricating oil is stored in the first space 81 via 75. A pressure drop occurs in the first space 81 due to an operation in which the relative distance between the convex portion 66 and the convex portion 76 increases, and the lubricating oil is easily sucked into the first space 81 through the suction oil passage 75.

  When the convex portion 65 of the output shaft outer peripheral member 61 contacts the convex portion 76 of the output shaft inner peripheral member 71 due to the movement of the output shaft outer peripheral member 61 in the circumferential direction, the output shaft inner peripheral member 71 is biased in the circumferential direction. And move. In this way, the rotation of the outer member 22 is transmitted to the output shaft outer peripheral member 61 and the output shaft inner peripheral member 71 of the inner member 23.

  When the outer member 22 rotates in the clockwise direction from the engaged state of the one-way clutch 21, the roller 25 also moves in the clockwise direction by the frictional force received from the output shaft outer peripheral member 61 of the outer member 22 and the inner member 23. By disengaging from the space, the one-way clutch 21 is disengaged.

  At this time, the output shaft outer peripheral member 61 is urged and moved in the clockwise direction by the frictional force received from the roller 25 when the engagement is released.

  As the convex portion 66 of the output shaft outer peripheral member 61 and the convex portion 76 of the output shaft inner peripheral member 71 approach each other, the lubricating oil accumulated in the first space 81 enters the second space 82 via the gap 83. Flows in. The lubricating oil accumulated in the first space 81 in a state where the convex portion 66 and the convex portion 76 are in contact with each other is in a state where it is accumulated in the second space 82.

  The disengaged roller 25 rotates in the clockwise direction. At this time, the roller 25 is immersed in the lubricating oil accumulated in the vicinity of the supply port 69, and the movement of the roller 25 is attenuated. Thereby, the impact at the time of the roller 25 contacting with the engagement spring 24 can be reduced, and the movement of the roller 25 can be stabilized.

  Thereafter, the roller 25 is urged by the engagement spring 24 as shown in FIG. 7B (A), and returns to the reference position (FIG. 7B (A)) where engagement is started. Lubricating oil collected in the vicinity of the supply port 69 is supplied into the space between the outer member 22 and the output shaft outer peripheral member 61 by centrifugal force when the inner peripheral member moves in the circumferential direction. The lubrication effect in the contact between the roller 25 and the inner peripheral surface 22a of the outer member 22 can be improved.

  According to this embodiment, by supplying lubricating oil according to the operating state of the one-way clutch 21, the behavior of the roller 25 when the one-way clutch 21 is engaged and when the engagement is released is stabilized, and torque fluctuation is suppressed. It becomes possible to do.

  When the one-way clutch 21 is engaged and released, the impact applied to the roller 25 can be reduced, and the generation of vibration and noise can be reduced.

  Further, according to the configuration of the present embodiment, by supplying the lubricating oil when the engagement starts, the sliding resistance with the inner peripheral surface 22a of the outer member 22 is reduced during torque transmission, and the energy loss is reduced. It is possible to provide a one-way clutch that reduces this.

  The embodiments of the present invention have been described above, but various design changes can be made without departing from the scope of the present invention.

  Further, the one-way clutch 21 of the present embodiment can be applied to any use other than the continuously variable transmission T. The continuously variable transmission T according to the embodiment includes six power transmission units U, but the number of power transmission units U is not limited to six.

  In the configuration shown in FIGS. 9A and 9B, the supply port 69 of the supply oil passage 63 is configured to be located on the lower end side of the inclined peripheral surface of the output shaft outer peripheral member 61. The position 69 may be, for example, a range from a reference position (FIG. 7B (A)) where engagement is started to a position on the engagement release side on the lower end side of the inclined peripheral surface of the output shaft outer peripheral member 61.

  9A and 9B show an example in which the supply oil passage 63 is configured to communicate with the second space 82, the purpose of the first and second embodiments is this example. For example, as shown in FIGS. 11A and 11B, it is possible to configure the supply oil passage obliquely from the first space 81.

  FIG. 11A is a diagram showing a modification of FIG. When the supply oil passage 111 is formed as shown in FIG. 11A, the supply oil passage 111 can supply lubricating oil when the one-way clutch 21 is engaged. When the one-way clutch 21 is disengaged, the lubricating oil is supplied from the supply oil passage 63 as described with reference to FIG.

  FIG. 11B is a diagram showing a modification of FIG. When the supply oil passage 112 is formed as shown in FIG. 11B, the supply oil passage 112 can supply the lubricating oil when the one-way clutch 21 is disengaged. When the one-way clutch 21 is engaged, the lubricating oil is supplied from the supply oil passage 63 as described with reference to FIG.

  Even if the configuration of the supply oil passage of FIGS. 11A and 11B is used, the one-way clutch 21 is supplied by supplying the lubricating oil according to the operation state of the one-way clutch 21 (when engaged and when released). It is possible to stabilize the behavior of the roller 25 at the time of engaging and releasing the engagement, and to suppress torque fluctuation.

Claims (10)

An input shaft (11) connected to the rotating shaft of the engine (E);
An output shaft (12) connected to the drive wheels (W);
An input side fulcrum (18) that is variable in eccentricity from the axis of the input shaft (11) and rotates together with the input shaft (11);
A one-way clutch (21) connected to the output shaft (12);
An output side fulcrum (19c) provided on the outer peripheral member (22) of the one-way clutch (21);
A connecting rod (19) connected to both ends of the input side fulcrum (18) and the output side fulcrum (19c), and reciprocating according to the amount of eccentricity;
A power transmission device for a vehicle comprising: a speed change actuator (14) for changing the amount of eccentricity;
The one-way clutch (21)
An inner peripheral member (23) that is coaxially rotatable inside the outer peripheral member (22) and is connected to the output shaft (12);
A plurality of rolling elements (25) that roll between the outer peripheral member (22) and the inner peripheral member (23);
The inner circumferential member (23)
An output shaft outer peripheral member (61) disposed on the outer peripheral side with respect to the output shaft (12) and formed with a rolling surface of the rolling element (25);
An output shaft inner peripheral member (71) disposed between the output shaft (12) and the output shaft outer peripheral member (61) and transmitting the rotation of the output shaft outer peripheral member (61) to the output shaft (12). And comprising
The output shaft outer peripheral member (61) is disposed so as to be rotatable relative to the output shaft inner peripheral member (71) in accordance with the operation of the one-way clutch (21).
Lubricating oil can be stored between the convex portion (64) formed on the output shaft outer peripheral member (61) and the convex portion (73) formed on the output shaft inner peripheral member (71). Space is formed,
The output shaft outer circumferential member (61) has a supply oil passage (63) that communicates with the space and can supply the lubricating oil to the rolling surface by the rotation of the output shaft outer circumferential member (61). A power transmission device for a vehicle characterized by being provided. The said supply oil path (63) supplies the said lubricating oil to the said rolling surface according to the said space becoming narrow by rotation of the said output shaft outer peripheral member (61). The vehicle power transmission device as described. On both sides of the convex portions (64, 75) of the output shaft outer peripheral member (61) or the output shaft inner peripheral member (71),
Lubricating oil can be stored by a concave portion formed by arranging two convex portions (73, 74, 65, 66) of the output shaft inner peripheral member (71) or the output shaft outer peripheral member (61). Space (81, 82) is formed,
The supply oil passage (63) communicating with the space (82) formed between one convex portion (73, 65) of the concave portion and the convex portion (64, 75) is formed on the output shaft outer peripheral member ( 61),
A suction oil passage (75) that sucks the lubricating oil in communication with the space (81) formed between the other convex portion (74, 66) of the concave portion and the convex portion (64, 75). The vehicular power transmission device according to claim 1, wherein the vehicular power transmission device is configured on the output shaft inner circumferential member (71). Lubricating oil is provided by a concave portion formed by disposing the two convex portions (73, 74) of the output shaft inner peripheral member (71) on both sides of the convex portion (64) of the output shaft outer peripheral member (61). A space (81, 82) capable of storing
The supply oil communicates with a space (82) formed between one convex portion (73) of the output shaft inner peripheral member (71) and a convex portion (64) of the output shaft outer peripheral member (61). A path (63) is formed in the output shaft outer peripheral member (61),
Lubricating oil communicates with a space (81) formed between the other convex portion (74) of the output shaft inner peripheral member (71) and the convex portion (64) of the output shaft outer peripheral member (61). The vehicle power transmission device according to claim 3, wherein a suction oil passage (75) for sucking air is configured in the output shaft inner circumferential member (71). When the rolling element (25) is detached from a wedge-shaped space formed between the inner peripheral surface (22a) of the outer peripheral member (22) and the rolling surface of the output shaft outer peripheral member (61), the one-way operation is performed. When the clutch (21) is disengaged,
The supply oil passage (63) supplies the lubricating oil to the rolling surface in response to the space (82) becoming narrow due to the rotation of the output shaft outer peripheral member (61). Item 5. The vehicle power transmission device according to Item 4. When the engagement of the one-way clutch (21) is released,
The suction oil passage (75) sucks the lubricating oil into the space (81) in response to the space (81) being widened by the rotation of the output shaft outer peripheral member (61). The vehicle power transmission device according to claim 5. Lubricating oil is provided by a concave portion formed by disposing the two convex portions (65, 66) of the output shaft outer peripheral member (61) on both sides of the convex portion (76) of the output shaft inner peripheral member (71). A space (81, 82) capable of storing
The supply oil communicates with a space (82) formed between one convex portion (65) of the output shaft outer peripheral member (61) and the convex portion (75) of the output shaft inner peripheral member (71). A path (63) is formed in the output shaft outer peripheral member (61),
Lubricating oil communicates with a space (81) formed between the other convex portion (66) of the output shaft outer peripheral member (61) and the convex portion (76) of the output shaft inner peripheral member (71). The vehicle power transmission device according to claim 3, wherein a suction oil passage (75) for sucking air is configured in the output shaft inner circumferential member (71). When the rolling element (25) bites into a wedge-shaped space formed between the inner peripheral surface (22a) of the outer peripheral member (22) and the rolling surface of the output shaft outer peripheral member (61), the one way When the clutch (21) is engaged,
The supply oil passage (63) supplies the lubricating oil to the rolling surface in response to the space (82) becoming narrow due to the rotation of the output shaft outer peripheral member (61). Item 8. The vehicle power transmission device according to Item 7. When the one-way clutch (21) is engaged,
The suction oil passage (75) sucks the lubricating oil into the space (81) in response to the space (81) being widened by the rotation of the output shaft outer peripheral member (61). The vehicle power transmission device according to claim 8. A plurality of one-way clutches (21) are connected to the output shaft (12),
The output shaft outer peripheral member (61) is disposed in each of the plurality of one-way clutches (21),
The output shaft inner circumferential member (71) is arranged as a common member for the plurality of one-way clutches (21),
The vehicle power transmission device according to any one of claims 1 to 9, wherein the rotation of the plurality of output shaft outer peripheral members (61) is transmitted to the output shaft inner peripheral member (71).

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