TWI882044B - One-way clutch unit for human-powered vehicle and wheel hub assembly for human-powered vehicle - Google Patents

Abstract

In order to provide a one-way clutch unit and a wheel hub assembly for a human-powered vehicle that can be appropriately used. A one-way clutch unit for a human-powered vehicle comprises: a supporting member, a first ratchet member having a first ratchet tooth and a first ratchet member hole, a second ratchet member having a second ratchet tooth and a second ratchet member hole, a receiving member having a receiving member hole, a spring member for springing the receiving member, a lubricant, and a suppression structure for suppressing the movement of the lubricant; at least a portion of the first ratchet member is disposed in the receiving member hole, at least a portion of the supporting member is disposed in the first ratchet member hole, at least a portion of the lubricant is disposed in a first portion between an inner peripheral portion of the first ratchet member hole and an outer peripheral portion of the supporting member, and the suppression structure is for suppressing the movement of the lubricant from the first portion to a second portion disposed between the receiving member hole and the first ratchet member.

Description

One-way clutch unit for human-powered vehicle and wheel hub assembly for human-powered vehicle

The present invention relates to a one-way clutch unit for a human-powered vehicle and a wheel hub assembly for a human-powered vehicle.

For example, Patent Document 1 discloses a one-way clutch unit for a human-driven vehicle. The one-way clutch unit of Patent Document 1 can be used appropriately by making a plurality of sliding parts slide appropriately. [Prior Art Document] [Patent Document]

[Patent Document 1] U.S. Patent No. 9707801 Specification

[The problem the invention is trying to solve]

One of the purposes of the present invention is to provide a one-way clutch unit for a human-powered vehicle and a wheel hub assembly for a human-powered vehicle that can be used appropriately. [Technical means for solving the problem]

According to the first aspect of the present invention, the one-way clutch unit is a one-way clutch unit for a human-driven vehicle, and comprises: a supporting member, a first ratchet member, a second ratchet member, a receiving member, a spring member, a lubricant, and a restraining structure, wherein the supporting member has a supporting member hole extending in an axial direction with respect to the rotation center axis of the one-way clutch unit. The first ratchet component has a first ratchet tooth and a first ratchet component hole extending in the axial direction, and the second ratchet component has a second ratchet tooth engaged with the first ratchet tooth and a second ratchet component hole extending in the axial direction, wherein the axial direction includes: a first axial direction from the second ratchet component toward the first ratchet component, and a second axial direction from the second ratchet component toward the first ratchet component. 1 ratchet member faces the second axial direction of the second ratchet member, the receiving member has a receiving member hole extending in the axial direction, the elastic member elastically presses the receiving member in the second axial direction, the inhibition structure inhibits the movement of the lubricant, at least a portion of the first ratchet member is disposed in the receiving member hole, at least a portion of the supporting member is disposed in the first ratchet member hole, at least a portion of the lubricant is disposed in the first portion between the inner peripheral portion of the first ratchet member hole and the outer peripheral portion of the supporting member, and the inhibition structure inhibits the movement of the lubricant from the first portion to the second portion disposed between the receiving member hole and the first ratchet member. According to the one-way clutch unit of the first aspect, the movement of the lubricant disposed in the first part to the second part is suppressed by the suppression structure. Therefore, by suppressing the movement of the lubricant to the second part, the friction caused by the lubricant when the receiving member and the first ratchet member slide is not easily affected. Therefore, the relative movement of the receiving member and the ratchet member is maintained in an appropriate state. Therefore, the one-way clutch for a human-driven vehicle can be used appropriately.

In the one-way clutch unit of the second aspect according to the first aspect, the support member includes at least one first screw bolt groove in the outer peripheral portion, and the first ratchet member includes at least one second screw bolt groove engaged with the at least one first screw bolt groove in the inner peripheral portion. According to the one-way clutch unit of the second aspect, the support member and the first ratchet member can be appropriately moved relative to each other in the axial direction by at least one first screw bolt groove and at least one second screw bolt groove.

In the one-way clutch unit of the third aspect according to the first or second aspect, the receiving member presses the first ratchet member toward the second axial direction. According to the one-way clutch unit of the third aspect, the first ratchet member can be moved toward the second ratchet member by the receiving member, so that the first ratchet member and the second ratchet member can be properly engaged.

In the one-way clutch unit of the fourth aspect according to any one of the first to third aspects, the aforementioned suppression structure has a convex portion protruding in a direction intersecting the aforementioned axial direction, the aforementioned convex portion includes at least one of a first convex portion and a second convex portion, the aforementioned first convex portion extends from the inner peripheral portion of the hole of the aforementioned first ratchet member toward the radial inner side with respect to the aforementioned rotation center axis, and the aforementioned second convex portion extends from the outer peripheral portion of the aforementioned support member toward the radial outer side. According to the one-way clutch unit of the fourth aspect, the convex portion can suppress the lubricant arranged in the first part from moving over the convex portion.

In the one-way clutch unit of the fifth aspect according to the fourth aspect, the convex portion is disposed on the downstream side of the first portion in the first axial direction. According to the one-way clutch unit of the fifth aspect, the convex portion can prevent the lubricant disposed in the first portion from passing over the convex portion and moving to the downstream side of the first portion.

In the one-way clutch unit of the sixth aspect according to the fourth or fifth aspect, the protrusion is formed as a different entity from the first ratchet member and the support member. According to the one-way clutch unit of the sixth aspect, since the protrusion is formed as a different entity from the first ratchet member and the support member, the complexity of the structure of the first ratchet member and the support member can be suppressed.

In the one-way clutch unit of the seventh aspect according to the sixth aspect, the protrusion includes at least one of a C-ring and a washer. According to the one-way clutch unit of the seventh aspect, the protrusion can be simply constructed using a C-ring and a washer.

In the one-way clutch unit of the eighth aspect according to the sixth or seventh aspect, at least one of the inner periphery of the hole of the first ratchet member and the outer periphery of the supporting member has a groove for arranging the protrusion. According to the one-way clutch unit of the eighth aspect, by arranging the protrusion in the groove, the protrusion is not easily moved relative to at least one of the inner periphery of the hole of the first ratchet member and the outer periphery of the supporting member.

In the one-way clutch unit of the ninth aspect according to any one of the fourth to eighth aspects, the convex portion is provided on at least one of the outer peripheral portion of the supporting member or the inner peripheral portion of the hole of the first ratchet member to cover more than 80% of the entire circumference in the circumferential direction of the rotation center axis. According to the one-way clutch unit of the ninth aspect, the convex portion is provided on at least one of the outer peripheral portion of the supporting member or the inner peripheral portion of the hole of the first ratchet member to cover more than 80% of the entire circumference in the circumferential direction of the rotation center axis, thereby appropriately suppressing the movement of the lubricant disposed in the first portion.

In the one-way clutch unit of the tenth aspect according to any one of the fourth to eighth aspects, the protrusion is provided on the inner periphery of the ratchet component hole to extend in a circumferential direction with a gap about the rotation center axis, and the length of the gap in the circumferential direction is 0.1 mm to 3 mm. According to the one-way clutch unit of the tenth aspect, the movement of the lubricant arranged in the first part can be suppressed by the protrusion having a gap with a length of 0.1 mm to 3 mm in the circumferential direction.

In the one-way clutch unit of the 11th aspect according to any one of the 1st to 10th aspects, the restraining structure includes a small diameter portion about the rotation center axis, and the small diameter portion is formed on at least one of the support member and the first ratchet member at the downstream side of the first part in the first axial direction. According to the one-way clutch unit of the 11th aspect, the lubricant arranged in the first part can be guided to a direction different from that of the second part by the small diameter portion.

In the one-way clutch unit of the 12th aspect according to the aforementioned 11th aspect, the aforementioned small diameter portion includes at least one of an inclined surface or a step difference surface, and the aforementioned inclined surface is inclined from the upstream side of the aforementioned first axial direction toward the downstream side of the first axial direction toward the radial inner side of the aforementioned rotation center axis. According to the one-way clutch unit of the aforementioned 12th aspect, the lubricant arranged in the first part can be guided to a direction different from that of the second part by the inclined surface or the step difference surface.

In the one-way clutch unit of the 13th aspect according to any one of the above-mentioned 1st to 12th aspects, the end of the aforementioned support member on the downstream side in the aforementioned first axial direction is arranged on the upstream side in the aforementioned first axial direction relative to the end of the aforementioned first ratchet member on the downstream side in the aforementioned first axial direction. According to the one-way clutch unit of the above-mentioned 13th aspect, the end of the supporting member on the downstream side in the first axial direction is arranged on the upstream side in the first axial direction relative to the end of the first ratchet member on the downstream side in the first axial direction, thereby suppressing the movement of the lubricant arranged in the first part to the second part.

In the one-way clutch unit of the 14th aspect according to any one of the 1st to 13th aspects, the outer peripheral portion of the first ratchet member has a first contact surface extending in a direction intersecting the axial direction, the receiving member has a second contact surface that can contact the first contact surface, and the second portion further includes a portion between the first contact surface and the second contact surface. According to the one-way clutch unit of the 14th aspect, the lubricant disposed in the first portion can be suppressed from moving to the portion between the first contact surface and the second contact surface.

In the one-way clutch unit of the 15th aspect according to any one of the above-mentioned 1st to 14th aspects, the above-mentioned 1st ratchet member is engaged with the above-mentioned supporting member as a component of the wheel hub assembly for a human-powered vehicle in a torque-transmitting manner, and the above-mentioned 2nd ratchet member is engaged with the wheel hub shell as a component of the wheel hub assembly for a human-powered vehicle in a torque-transmitting manner. According to the one-way clutch unit of the 15th aspect, a one-way clutch unit having a 2nd ratchet member and a supporting member as a component of the wheel hub assembly for a human-powered vehicle can be appropriately used, and the 2nd ratchet member is engaged with the wheel hub shell as a component of the wheel hub assembly for a human-powered vehicle in a torque-transmitting manner.

According to the 16th aspect of the present invention, the wheel hub assembly is a wheel hub assembly for a human-powered vehicle, which is equipped with a one-way clutch unit for a human-powered vehicle described in any one of the above-mentioned 1st to 15th aspects. According to the above-mentioned 15th aspect of the wheel hub assembly, the wheel hub assembly for a human-powered vehicle can be appropriately used. [Effect of the invention]

The one-way clutch unit for a human-powered vehicle and the wheel hub assembly for a human-powered vehicle of the present invention can be appropriately used.

＜Implementation form＞

Referring to FIG. 1 to FIG. 10 , a wheel hub assembly 10 for a human-powered vehicle and a one-way clutch unit 30 for a human-powered vehicle are described in an embodiment. A human-powered vehicle is a vehicle having at least one wheel and being driven at least by human power. Human-powered vehicles include, for example, various types of bicycles such as mountain bikes, road bikes, city commuter bikes, cargo bikes, handbikes, and recumbent bikes. There is no limit to the number of wheels a human-powered vehicle has. Human-powered vehicles also include, for example, vehicles having one wheel and vehicles having three or more wheels. Human-powered vehicles are not limited to vehicles that can only be driven by human power. Human-powered vehicles include electric bicycles (E-bikes) that are propelled by not only human power but also electric motor power. Electric bicycles include electric-assisted bicycles that are propelled by electric motors. In the following, in the embodiment, human-powered vehicles are described in the form of bicycles.

The wheel hub assembly 10 for a human-powered vehicle is provided with a one-way clutch unit 30 for a human-powered vehicle. In the present embodiment, the wheel hub assembly 10 is, for example, an axle provided on the rear wheel of the human-powered vehicle. The wheel hub assembly 10 includes: a supporting member 32, a wheel hub shell 12, and a wheel hub axle 14. A part of the supporting member 32 constitutes the one-way clutch unit 30. The wheel hub axle 14 is supported by the frame of the human-powered vehicle.

≪Wheel hub shell 12≫ The wheel hub shell 12 is rotatably mounted on the wheel hub shaft 14. The outer periphery of the wheel hub shell 12 is provided with a mounting portion 12A for mounting the spokes of the wheel. The rotation of the sprocket input to the supporting member 32 is transmitted to the wheel hub shell 12 via the one-way clutch unit 30.

≪One-way clutch unit 30≫ As shown in FIG. 2 and FIG. 3 , the one-way clutch unit 30 includes: a supporting member 32, a first ratchet member 34, a second ratchet member 36, a receiving member 38, and a spring member 40. The first ratchet member 34 is engaged with the supporting member 32 as a component of the wheel hub assembly 10 in a torque-transmitting manner. The second ratchet member 36 is engaged with the wheel hub shell 12 as a component of the wheel hub assembly 10 in a torque-transmitting manner.

≪Support member 32≫ The support member 32 is rotatably mounted on the wheel hub shaft 14 relative to the wheel hub shaft 14. The support member 32 holds the rear sprocket of the human-powered vehicle. The support member 32 has: an input portion 16 for inputting the rotation of the rear sprocket of the human-powered vehicle. The input portion 16 is, for example, a bolt groove provided on the outer periphery of the support member 32. The bolt groove provided on the outer periphery of the support member 32 engages with the bolt groove provided on the inner periphery of the rear sprocket. The support member 32 is configured to be rotatable integrally with the rear sprocket.

The support member 32 has a support member hole 46 extending in the axial direction X about the rotation center axis C of the one-way clutch unit 30. The axial direction X includes a first axial direction X1 from the second ratchet member 36 toward the first ratchet member 34, and a second axial direction X2 from the first ratchet member 34 toward the second ratchet member 36. The outer peripheral portion 32A of the support member 32 includes at least one first spiral bolt groove 48. The first spiral bolt groove 48 is a constituent element of the one-way clutch unit 30. The first spiral bolt groove 48 is provided in the outer peripheral portion 32A of the support member 32. The first spiral bolt groove 48 is formed at the end of the support member 32 on the first axial direction X1 side. The first spiral bolt groove 48 extends in the axial direction X in a spiral shape relative to the rotation center axis C.

≪First ratchet member 34≫ The first ratchet member 34 is engaged with the support member 32 so as to transmit torque as described above. The first ratchet member 34 has a first ratchet tooth 50 engaged with the second ratchet member 36. The first ratchet member 34 is configured to transmit the rotation of the first ratchet member 34 to the second ratchet member 36 by engaging with the second ratchet member 36. By releasing the engagement between the first ratchet member 34 and the second ratchet member 36, the relative rotation of the first ratchet member 34 and the second ratchet member 36 is allowed.

The first ratchet component 34 is formed in an annular shape. The first ratchet component 34 has a convex portion 34E and a cylindrical portion 34F. The convex portion 34E is formed at the end of the cylindrical portion 34F in the second axial direction X2. The convex portion 34E extends from the cylindrical portion 34F toward the outer side in the radial direction about the rotation center axis C. The first contact surface 34D is provided on the surface of the convex portion 34E on the first axial direction X1 side. The first ratchet tooth 50 is provided on the surface of the convex portion 34E on the second axial direction X2 side. The first ratchet component 34 has: the first ratchet tooth 50 and the first ratchet component hole 52 extending in the axial direction X. The inner peripheral portion 34A of the first ratchet component 34 is formed in the first ratchet component hole 52. The inner circumference 34A of the first ratchet member 34 includes at least one second screw bolt groove 54 engaged with at least one first screw bolt groove 48. The first screw bolt groove 48 and the second screw bolt groove 54 are engaged with each other, so that the first ratchet member 34 can be engaged with the support member 32 in a torque-transmitting manner. At least a portion of the support member 32 is disposed in the first ratchet member hole 52. In the present embodiment, the first screw bolt groove 48 is disposed in the first ratchet member hole 52.

≪Second ratchet member 36≫ The second ratchet member 36 is formed in an annular shape. The second ratchet member 36 has: a second ratchet tooth 56 engaged with the first ratchet tooth 50, and a second ratchet member hole 58 extending in the axial direction X. The second ratchet member 36 has: a bolt groove 59 formed on the outer periphery. The bolt groove 59 is engaged with the bolt groove formed on the inner periphery of the wheel hub shell 12. By engaging the bolt groove 59 of the second ratchet member 36 with the bolt groove of the wheel hub shell 12, the second ratchet member 36 can be engaged with the wheel hub shell 12 in a torque-transmitting manner.

≪Receiving member 38≫ As shown in FIG. 2 , the receiving member 38 of the one-way clutch unit 30 is divided in the circumferential direction about the rotation center axis C. In the present embodiment, the receiving member 38 is divided into three parts in the circumferential direction. When the receiving member 38 is mounted on the first ratchet member 34, the receiving member 38 is formed into a ring shape. In a modified example, the receiving member 138 described later is not divided in the circumferential direction but is formed into a single ring shape. The receiving member 38 has a cylindrical portion 38C.

When the receiving member 38 is mounted on the first ratchet member 34, the receiving member 38 has a receiving member hole 60 extending in the axial direction X. That is, in the present embodiment, the receiving member hole 60 is formed by combining the divided receiving members 38. At least a portion of the first ratchet member 34 is disposed in the receiving member hole 60. The first ratchet member 34 is configured to be rotatable relative to the receiving member 38. The receiving member 38 is disposed on the outer side in the radial direction of the rotation center axis C of the barrel portion 34F of the first ratchet member 34. The inner peripheral portion 38A of the receiving member hole 60 is connected to the outer peripheral portion 34C of the first ratchet member 34. The inner peripheral portion 38A of the receiving member hole 60 is connected to the outer peripheral portion 34C of the barrel portion 34F.

The receiving member 38 is used to bias the first ratchet member 34 toward the second axial direction X2. As described above, the outer peripheral portion 34C of the first ratchet member 34 has a convex portion 34E protruding outward in the radial direction. The end portion of the receiving member 38 on the upstream side in the first axial direction X1 is configured to be in contact with the convex portion 34E. In the present embodiment, the second contact surface 62 of the receiving member 38 is in contact with the first contact surface 34D of the first ratchet member 34. The biasing member 40 biases the receiving member 38 toward the second axial direction X2, thereby biasing the first ratchet member 34 toward the second axial direction X2 by the receiving member 38. As shown in FIG. 2 , the receiving member 38 has an engaging protrusion 38D protruding from the cylindrical portion 38C in the axial direction X. The engaging protrusion 38D extends from the end portion of the receiving member 38 in the first axial direction X1 in the first axial direction X1. The engaging protrusion 38D is formed on each of the divided receiving members 38. The engaging protrusion 38D engages with a corresponding engaging recess formed on the wheel hub shell 12. Thereby, the receiving member 38 and the wheel hub shell 12 are rotated integrally with respect to the wheel hub shaft 14.

≪Elastic pressure member 40≫ The elastic pressure member 40 is used to elastically pressure the receiving member 38 in the second axial direction X2. The elastic pressure member 40 is, for example, an elastic member. The elastic pressure member 40 includes, for example, a coil spring. The elastic pressure member 40 may also be a disc spring. The elastic pressure member 40 is arranged between: the end 38F on the upstream side of the receiving member 38 in the first axial direction X1 and the step portion 12B of the wheel hub shell 12 that is closer to the downstream side of the receiving member 38 in the first axial direction X1. In the present embodiment, the end 38F is a convex portion 38B. That is, one end of the spring-pressing member 40 is connected to the wheel hub shell 12. Moreover, the other end of the spring-pressing member 40 is connected to the receiving member 38. The other end of the spring-pressing member 40 is connected to the convex portion 38B of the receiving member 38. Thereby, the spring-pressing member 40 is relative to the wheel hub shell 12, and the receiving member 38 is pressed toward the second axial direction X2. Moreover, the spring-pressing member 40 is relative to the wheel hub shell 12, and the first ratchet member 34 is pressed toward the second ratchet member 36 side.

≪Auxiliary elastic member 41≫ Preferably, the one-way clutch unit 30 further has an auxiliary elastic member 41. The auxiliary elastic member 41 is to elastically press the receiving member 38 inward in the radial direction with respect to the rotation center axis C. The auxiliary elastic member 41 is, for example, arranged on the outer peripheral portion 38E of the receiving member 38. The auxiliary elastic member 41 is, for example, an elastic member. In the present embodiment, the auxiliary elastic member 41 has an annular shape. The auxiliary elastic member 41 has a first circumferential end 41A and a second circumferential end 41B. The second circumferential end 41B is configured to be separated from the first circumferential end 41A in the circumferential direction about the rotation center axis C. The auxiliary elastic member 41 can be elastically deformed in the radial direction. In this embodiment, the auxiliary elastic member 41 is C-shaped. The auxiliary elastic member 41 can also be, for example, a coil spring.

≪Ratchet Movement≫ When the human-powered vehicle is driven, by pedaling, the rotation is input from the rear sprocket to the support member 32 in such a way that the human-powered vehicle moves forward. When the human-powered vehicle is driven, the support member 32 rotates the first ratchet member 34 using the first screw bolt groove 48 and the second screw bolt groove 54. In addition, in the axial direction X, the first ratchet member 34 approaches the second ratchet member 36. The first ratchet tooth 50 is engaged with the second ratchet tooth 56. The first ratchet member 34 is engaged with the second ratchet member 36, and the rotation of the first ratchet member 34 is transmitted to the second ratchet member 36. In addition, the rotation of the second ratchet member 36 is transmitted to the wheel hub shell 12.

For example, when the human-powered vehicle is going downhill, the rear sprocket does not rotate but the wheel rotates. This is coasting. During coasting, the rear sprocket and the supporting member 32 do not rotate. On the other hand, the first ratchet member 34 rotates in the same direction as the wheel hub shell 12 by engaging with the second ratchet member 36 and by friction with the receiving member 38. That is, relative to the supporting member 32, the first ratchet member 34 rotates in the opposite direction to when the human-powered vehicle is driven. Moreover, by means of the first screw bolt groove 48 and the second screw bolt groove 54, the first ratchet member 34 is moved in the direction away from the second ratchet member 36 (the first axial direction X1). The second ratchet member 36 moves in the first axial direction X1 against the elastic force of the elastic member 40 by the second screw bolt groove 54 and the first screw bolt groove 48. The engagement between the first ratchet teeth 50 and the second ratchet teeth 56 is released, and the rotation of the first ratchet member 34 cannot be transmitted to the second ratchet member 36. In the state where the engagement between the first ratchet member 34 and the second ratchet member 36 is released, the first ratchet member 34 rotates in the same direction as the wheel hub shell 12 by friction with the receiving member 38. The receiving member 38 rotates in the same direction as the wheel hub shell 12. For example, the receiving member 38 rotates integrally with the wheel hub shell 12. Then, the second screw bolt groove 54 reaches the end of its movable range with respect to the first screw bolt groove 48. And the rotation of the second screw bolt groove 54 relative to the first screw bolt groove 48 stops. That is, the rotation of the first ratchet member 34 relative to the support member 32 stops. At this time, slip occurs between the first ratchet member 34 and the receiving member 38.

The one-way clutch unit 30 can realize the relative movement of the first ratchet member 34 and the second ratchet member 36 in the axial direction X. The one-way clutch unit 30 can be switched between a state where the first ratchet member 34 and the second ratchet member 36 are engaged and a state where the first ratchet member 34 and the second ratchet member 36 are disengaged. During sliding, since the first ratchet member 34 and the second ratchet member 36 are disengaged, the generation of abnormal noise during sliding is suppressed.

As described above, when the engagement between the first ratchet member 34 and the second ratchet member 36 is released, the first ratchet member 34 rotates due to the friction between the first ratchet member 34 and the receiving member 38. Therefore, it is necessary to suppress the change of the friction coefficient between the first ratchet member 34 and the receiving member 38. That is, the suppression structure 44 prevents the lubricant 42 of the first portion 30A from flowing into the second portion 30B. Thereby, the change of the friction coefficient between the first ratchet member 34 and the receiving member 38 is suppressed.

≪Lubricant 42, first portion 30A, second portion 30B≫ Preferably, the lubricant 42 is used to facilitate the relative movement of the first screw bolt groove 48 and the second screw bolt groove 54. At least a portion of the lubricant 42 is disposed in the first portion 30A between the inner circumference 34A of the first ratchet member hole 52 and the outer circumference 32A of the support member 32. In the present embodiment, the first portion 30A is a portion between the first screw bolt groove 48 and the second screw bolt groove 54. The inhibition structure 44 inhibits the movement of the lubricant 42. The inhibition structure 44 inhibits the movement of the lubricant 42 from the first portion 30A to the second portion 30B.

The second portion 30B is disposed between the receiving member hole 60 and the first ratchet member 34. The second portion 30B is disposed between the inner peripheral portion 38A of the receiving member 38 and the outer peripheral portion 34C of the first ratchet member 34. The outer peripheral portion 34C of the first ratchet member 34 has a first contact surface 34D extending in a direction intersecting the axial direction X. The receiving member 38 has a second contact surface 62 capable of contacting the first contact surface 34D. The second portion 30B further includes a portion between the first contact surface 34D and the second contact surface 62. The first contact surface 34D is disposed on the convex portion 34E. The first contact surface 34D is a surface of the convex portion 34E facing the first axial direction X1 side. The second contact surface 62 is provided at the upstream end of the receiving member 38 in the first axial direction X1. The first ratchet tooth 50 is formed, for example, on the back side of the first contact surface 34D of the convex portion 34E in the axial direction X. The first ratchet tooth 50 is formed on the surface of the convex portion 34E facing the second axial direction X2.

Preferably, the end portion 32B on the downstream side in the first axial direction X1 of the support member 32 is arranged on the upstream side in the first axial direction X1 relative to the end portion 34G on the downstream side in the first axial direction X1 of the first ratchet member 34. Preferably, the end portion on the downstream side in the first axial direction X1 of the receiving member 38 is arranged on the upstream side in the first axial direction X1 relative to the end portion 34G on the downstream side in the first axial direction X1 of the first ratchet member 34. When the receiving member 38 is located lower (on the ground side) than the first ratchet member 34, it is difficult for the lubricant 42 to reach the inner peripheral portion 38A of the receiving member 38.

≪Suppression structure 44≫ Preferably, the suppression structure 44 has: a convex portion 64 protruding in a direction intersecting the axial direction X. The convex portion 64 includes at least one of a first convex portion and a second convex portion, the first convex portion extending from the inner circumference 34A of the first ratchet member hole 52 toward the radial inner side with respect to the rotation center axis C, and the second convex portion extending from the outer circumference of the support member 32 toward the radial outer side. In the present embodiment, the convex portion 64 has the first convex portion. When the convex portion 64 is provided on the inner circumference 34A of the first ratchet member hole 52, the movement of the lubricant 42 to the second portion 30B located on the outer circumference 34C of the first ratchet member 34 can be more appropriately suppressed.

Preferably, the convex portion 64 is disposed on the downstream side of the first portion 30A in the first axial direction X1. The convex portion 64 is, for example, disposed near the end portion of the inner peripheral portion 34A of the first ratchet member hole 52 on the downstream side in the first axial direction X1. The convex portion 64 is disposed on the downstream side of the second screw bolt groove 54 in the first axial direction X1. When the first ratchet tooth 50 and the second ratchet tooth 56 are engaged, the convex portion 64 is disposed on the downstream side of the first screw bolt groove 48 in the first axial direction X1.

Preferably, the protrusion 64 is formed as a separate entity from the first ratchet member 34 and the support member 32. The protrusion 64 includes at least one of a C-shaped ring 66 and a washer. In the present embodiment, the protrusion 64 includes a C-shaped ring 66. The protrusion 64 may also be formed as a single body with at least one of the first ratchet member 34 and the support member 32.

Preferably, the projection 64 is provided over 80% or more of the entire circumference in the circumferential direction about the rotation center axis C in at least one of the outer circumference 32A of the support member 32 or the inner circumference 34A of the first ratchet member hole 52 .

Preferably, the projection 64 is provided so as to extend with a gap 64A in the circumferential direction about the rotation center axis C at the inner circumferential portion 34A of the first ratchet member hole 52. The length of the gap 64A in the circumferential direction is 0.1 mm to 3 mm. When the projection 64 includes the C-shaped ring 66, the gap 64A constitutes a discontinuous portion of the C-shaped ring 66.

Preferably, at least one of the inner circumference 34A of the first ratchet member hole 52 and the outer circumference 32A of the support member 32 has a groove 34B for arranging the protrusion 64. In the present embodiment, the inner circumference 34A of the first ratchet member hole 52 has the groove 34B. Preferably, the groove 34B is formed on the entire circumference of the first ratchet member hole 52. The depth of the groove 34B is, for example, 1/4 to 2/3 of the width of the C-shaped ring 66 in the radial direction.

Preferably, the restraining structure 44 includes a small diameter portion 68 about the rotation center axis C, and the small diameter portion 68 is formed on at least one of the support member 32 and the first ratchet member 34 at the downstream side of the first portion 30A in the first axial direction X1. In the present embodiment, the small diameter portion 68 is formed on the support member 32.

Preferably, the small diameter portion 68 includes at least one of an inclined surface 70 or a step surface, and the inclined surface 70 is inclined from the upstream side of the first axial direction X1 toward the downstream side of the first axial direction X1 toward the radial inner side with respect to the rotation center axis C. The small diameter portion 68 is formed on the surface of the support member 32 opposite to the inner peripheral portion 34A of the first ratchet member 34. The inclined surface 70 is, for example, provided at the end portion of the first screw bolt groove 48 on the downstream side in the first axial direction X1. The inclined surface 70 is, for example, inclined from the top of the bolt groove tooth of the first screw bolt groove 48 protruding toward the radial outer side toward the radial inner side. The inclined surface 70 is formed, for example, at the end portion in the first axial direction X1 of the bolt groove teeth of the first spiral bolt groove 48. The downstream side in the first axial direction X1 of the small diameter portion 68 is farther from the inner peripheral portion 34A of the first ratchet member 34 than the upstream side in the first axial direction X1 of the small diameter portion 68. The lubricant 42 flowing from the upstream side in the first axial direction X1 toward the downstream side in the first axial direction X1 is stored in the space formed by the small diameter portion 68 and the inner peripheral portion 34A.

When the small diameter portion 68 is formed on the first ratchet member 34, the small diameter portion 68 is formed on the inner peripheral portion 34A. The small diameter portion 68 formed on the first ratchet member 34 is a convex portion for blocking the flow of the lubricant 42.

<Variations> The description of the implementation form is an example of the form that the one-way clutch unit and the wheel hub assembly for a human-powered vehicle according to the present invention can take, and there is no intention to limit the form. According to the one-way clutch unit and the wheel hub assembly for a human-powered vehicle according to the present invention, the form of the modification of the implementation form shown below and the form of at least two non-contradictory modifications can be taken. In the following modifications, the parts that are in common with the form of the implementation form are given the same symbols as the implementation form and their descriptions are omitted.

The restraining structure 44 can also be applied to the one-way clutch unit 130 shown in FIGS. 11 to 13. The one-way clutch unit 130 includes: a supporting member 32, a first ratchet member 34, a second ratchet member 36, a receiving member 138, and a spring member 40. The one-way clutch unit 130 is different from the one-way clutch unit 30 in that the receiving member 138 is not divided in the circumferential direction, the receiving member 138 does not have an engaging protrusion 38D, and does not have an auxiliary spring member 41. The first ratchet member 34 of the one-way clutch unit 130 has a recess 134A on the first axial direction X1 side of the protrusion 34E. The recess 134A extends in the circumferential direction about the rotation center axis C. The recess 134A is formed into an annular shape with the rotation center axis C as the center axis. The first ratchet member 34 of the one-way clutch unit 130 has: a recess 134A at the end portion on the upstream side of the first axial direction X1 for arranging the receiving member 138. That is, at least a portion of the receiving member 138 is arranged in the recess 134A. The convex portion 38B of the receiving member 138 is arranged in the recess 134A. The first contact surface 34D is provided on the bottom surface of the recess 134A. Here, the bottom surface is the innermost surface of the recess 134A in the axial direction X. In the one-way clutch unit 130, the bottom surface is a surface perpendicular to the rotation center axis C. Preferably, the receiving member 138 is entirely arranged inside the recess 134A. Preferably, the end portion of the receiving member 138 on the downstream side in the first axial direction X1 is arranged on the upstream side in the first axial direction X1 relative to the end portion 34G on the downstream side in the first axial direction X1 of the first ratchet member 34. As described above, the receiving member 138 does not have the engaging protrusion 38D. That is, the receiving member 138 is not directly engaged with the wheel hub shell 12. One end of the elastic member 40 is engaged with the wheel hub shell 12. The other end of the elastic member 40 is engaged with the receiving member 138. That is, the receiving member 138 is engaged with the wheel hub shell 12 through the elastic member 40. Thereby, the receiving member 138 is rotated integrally with the wheel hub shell 12 relative to the wheel hub shaft 14 .

The one-way clutch unit 30 shown in FIG14 may be provided with a suppression structure 44 of another structure. As shown in FIG14 , the suppression structure 44 may include at least one of a first recess 44A and a second recess 44B, wherein the first recess 44A extends from the inner peripheral portion 34A of the first ratchet member hole 52 toward the radial outer side with respect to the rotation center axis C, and the second recess 44B extends from the outer peripheral portion 32A of the support member 32 toward the radial inner side. By retaining the lubricant 42 in the first recess 44A and the second recess 44B, the lubricant 42 can be suppressed from flowing into the second portion 30B.

The one-way clutch unit 30 can also be used in other than the wheel hub assembly 10. For example, the one-way clutch unit 30 can be disposed between the crankshaft and the front sprocket of the human-powered vehicle. The one-way clutch unit 30 can also be disposed between the motor that provides the propulsion force to the human-powered vehicle and the components that constitute the transmission path of the human-powered driving force.

The term "at least one" used in this specification refers to "one or more" of the desired options. As an example, if there are two options, the term "at least one" used in this specification means "only one option" or "both of the two options". As another example, if there are three or more options, the term "at least one" used in this specification means "only one option" or "a combination of two or more options".

10: Wheel hub assembly 12: Wheel hub housing 12A: Mounting section 14: Wheel hub shaft 16: Input section 30,130: One-way clutch unit 30A: First section 30B: Second section 32: Support member 32A: Outer periphery 32B: End section 34: First ratchet member 34A: Inner periphery 34B: Groove 34C: Outer periphery 34D: First contact surface 34E: Protrusion 34F: Cylinder 34G: End section 134A: Recess 36: Second ratchet member 38,138: Receiving member 38A: Inner periphery 38B: Protrusion 38C: Cylinder 38D: Engaging convex portion 38E: Peripheral portion 38F: End portion 40: Elastic member 41: Auxiliary elastic member 41A: First circumferential end 41B: Second circumferential end 42: Lubricant 44: Suppression structure 44A: First concave portion 44B: Second concave portion 46: Support member hole 48: First spiral bolt groove 50: First ratchet tooth 52: First ratchet member hole 54: Second spiral bolt groove 56: Second ratchet tooth 58: Second ratchet member hole 59: Bolt groove 60: Receiving member hole 62: Second contact surface 64: Protrusion 64A: Gap 66: C-shaped ring 68: Small diameter 70: Inclined surface C: Rotation center axis X: Axis direction X1: 1st axis direction X2: 2nd axis direction

[FIG. 1] is a perspective view of a wheel hub assembly for a human-powered vehicle in an embodiment. [FIG. 2] is an exploded perspective view of a portion of the wheel hub assembly for a human-powered vehicle and a one-way clutch unit for a human-powered vehicle in FIG. 1. [FIG. 3] is a cross-sectional view along the D3-D3 line in FIG. 2. [FIG. 4] is a cross-sectional view showing a portion of FIG. 3 in an enlarged manner. [FIG. 5] is a perspective view showing the support member, the first ratchet member, and the restraining structure in FIG. 3. [FIG. 6] is a perspective view showing the support member in FIG. 3. [FIG. 7] is a side view showing the support member in FIG. 3. [FIG. 8] is a perspective view showing the first ratchet member and the protrusion in FIG. 3. [FIG. 9] is a top view of the first ratchet member and the protrusion in FIG. 3. [Fig. 10] is a cross-sectional view along the D10-D10 line of Fig. 9. [Fig. 11] is a partial cross-sectional view of a part of the wheel hub assembly for a human-powered vehicle and a one-way clutch unit for a human-powered vehicle of the first variant. [Fig. 12] is a three-dimensional view showing the support member, the first ratchet member and the restraining structure of Fig. 11. [Fig. 13] is a three-dimensional view showing the first ratchet member and the protrusion of Fig. 11. [Fig. 14] is a cross-sectional view showing a part of the one-way clutch unit of the second variant.

30A: Part 1

30B: Part 2

32: Supporting member

32A: Periphery

32B: End

34: 1st ratchet component

34A: Inner circumference

34B: Groove

34D: 1st contact surface

34E:convex part

34F: barrel

34G: End

38: Accept components

38A: Inner circumference

38B:Protrusion

38C: barrel

38E: Periphery

38F: End

40: Spring-loaded components

41: Auxiliary elastic pressure component

42: Lubricant

44: Inhibitory structure

50: 1st ratchet tooth

52: 1st ratchet component hole

56: 2nd ratchet tooth

58: Second ratchet component hole

62: Second contact surface

64:convex part

66: C-shaped ring

68: Small path

70: Inclined surface

X: Axis direction

X1: 1st axis direction

X2: 2nd axis direction

Claims (16)

A one-way clutch unit is a one-way clutch unit for a human-driven vehicle, and comprises: a supporting member, a first ratchet member, a second ratchet member, a receiving member, a spring member, a lubricant, and a restraining structure. The supporting member has a supporting member hole extending in an axial direction about a rotation center axis of the one-way clutch unit. The first ratchet member has a first ratchet tooth and a first ratchet member hole extending in the axial direction. The second ratchet member has a second ratchet tooth engaged with the first ratchet tooth and a second ratchet member hole extending in the axial direction. The aforementioned axial direction includes: a first axial direction from the aforementioned second ratchet member toward the aforementioned first ratchet member, and a second axial direction from the aforementioned first ratchet member toward the aforementioned second ratchet member, the aforementioned receiving member has a receiving member hole extending toward the aforementioned axial direction, the aforementioned spring member springs the aforementioned receiving member toward the aforementioned second axial direction, the aforementioned inhibition structure inhibits the movement of the aforementioned lubricant, at least a portion of the aforementioned first ratchet member is disposed in the aforementioned receiving member hole, at least a portion of the aforementioned supporting member is disposed in the aforementioned first ratchet member hole, at least a portion of the aforementioned lubricant is disposed in the first portion between the inner periphery of the aforementioned first ratchet member hole and the outer periphery of the aforementioned supporting member, The aforementioned inhibition structure inhibits the aforementioned lubricant from moving from the aforementioned first portion to the second portion disposed between the aforementioned receiving member hole and the aforementioned first ratchet member. The one-way clutch unit as described in claim 1, wherein: the supporting member includes at least one first spiral bolt groove in the outer peripheral portion; the first ratchet member includes at least one second spiral bolt groove engaged with the at least one first spiral bolt groove in the inner peripheral portion. A one-way clutch unit as described in claim 1 or 2, wherein the receiving member is configured to press the first ratchet member toward the second axis. A one-way clutch unit as described in claim 1, wherein, the aforementioned restraining structure has a convex portion protruding in a direction intersecting with the aforementioned axial direction, the aforementioned convex portion includes at least one of a first convex portion and a second convex portion, the aforementioned first convex portion extends from the inner peripheral portion of the hole of the aforementioned first ratchet member toward the inner side in the radial direction about the aforementioned rotation center axis, and the aforementioned second convex portion extends from the outer peripheral portion of the aforementioned support member toward the outer side in the aforementioned radial direction. A one-way clutch unit as described in claim 4, wherein the convex portion is disposed on the downstream side of the first portion in the direction of the first axis. A one-way clutch unit as described in claim 4 or 5, wherein the protrusion is formed as a different entity from the first ratchet member and the supporting member. A one-way clutch unit as described in claim 6, wherein the protrusion includes at least one of a C-shaped ring and a gasket. A one-way clutch unit as described in claim 6, wherein, at least one of the inner peripheral portion of the hole of the first ratchet member and the outer peripheral portion of the supporting member has a groove for arranging the protrusion. A one-way clutch unit as described in claim 4 or 5, wherein the protrusion is provided on at least one of the outer periphery of the support member or the inner periphery of the hole of the first ratchet member so as to cover more than 80% of the entire circumference in the circumferential direction about the rotation center axis. A one-way clutch unit as described in claim 4 or 5, wherein, the protrusion is arranged on the inner periphery of the ratchet component hole to extend in a circumferential direction with a gap about the rotation center axis, the length of the gap in the circumferential direction is 0.1 mm to 3 mm. A one-way clutch unit as described in claim 1 or 4, wherein, the aforementioned restraining structure includes a small diameter portion about the aforementioned rotation center axis, the aforementioned small diameter portion is formed on at least one of the aforementioned support member and the aforementioned first ratchet member on the downstream side of the aforementioned first portion in the aforementioned first axial direction. The one-way clutch unit as described in claim 11, wherein the small diameter portion includes at least one of an inclined surface or a step surface, and the inclined surface is inclined from the upstream side in the first axial direction toward the downstream side in the first axial direction and toward the inner side in the radial direction with respect to the rotation center axis. A one-way clutch unit as described in claim 1 or 4, wherein, the end of the supporting member on the downstream side in the first axial direction is arranged on the upstream side in the first axial direction relative to the end of the first ratchet member on the downstream side in the first axial direction. A one-way clutch unit as described in claim 1 or 4, wherein: the outer peripheral portion of the first ratchet member has a first contact surface extending in a direction intersecting the axial direction; the receiving member has a second contact surface capable of contacting the first contact surface; the second portion further includes a portion between the first contact surface and the second contact surface. A one-way clutch unit as described in claim 1 or 4, wherein, the first ratchet member is engaged with the aforementioned support member as a component of a wheel hub assembly for a human-powered vehicle in a torque-transmitting manner, the second ratchet member is engaged with a wheel hub shell as a component of a wheel hub assembly for a human-powered vehicle in a torque-transmitting manner. A wheel hub assembly is a wheel hub assembly for a human-powered vehicle, which has a one-way clutch unit for a human-powered vehicle as described in any one of claims 1 to 15.

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