Ratchet wheel structure of bicycle hub

Abstract

The utility model provides a ratchet wheel structure of a bicycle hub, which comprises a clutch ratchet group, a first ratchet ring and a second ratchet ring which are made of magnetic materials and mutually exclusive in magnetism, a plurality of first ratchets and second ratchets which are radially arranged are respectively arranged on one end face of each first ratchet ring and one end face of each second ratchet ring, and a plurality of second ratchets are respectively arranged on the other end face of each first ratchet ring and the other end face of each second ratchet ring. The other meshed end edges of the first ratchet rings and the second ratchet rings are respectively provided with an elastic element; a first transmission group is arranged between each first ratchet ring and the hub seat, and a second transmission group is arranged between each first transmission group and the hub seat; therefore, the first ratchet ring and the second ratchet ring which are in a magnetic repulsion state are utilized to generate separation force, and elastic elements at the other ends of the first ratchet ring and the second ratchet ring are matched to apply approaching force, so that the ratchet rings are in a floating state, and when friction force is larger than elastic force and the repulsion force is added, the separation distance between the ratchets on the two sides can be increased so as to reduce friction. And the service life of the ratchets is prolonged, the non-treading tooth disengaging action is quicker and more sensitive, and the maintenance cost can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to a ratchet structure, in particular to a structure used between a hub seat and a flywheel sleeve of a bicycle, which generates intermittent one-way transmission by the axial linear clutch action of the hub. Background Art

[0002] When riding a bicycle, pedaling transmits power to the rear wheel hub assembly through a chain and sprocket connected to the pedals, generating driving force for the rear wheel and propelling the bicycle forward. When the pedals are not pedaling, the rear wheel and hub assembly continue to rotate, allowing the bicycle to continue moving forward. This transmission mode is achieved primarily by utilizing the ratchet mechanism within the rear wheel hub assembly, which generates intermittent, one-way transmission.

[0003] The ratchet structure generally used on the hub seat and the sleeve can be roughly divided into two categories, namely "swinging type" and "linear type", according to the different action modes of the intermittent transmission ratchet of the active part. Among them, "swinging type" refers to the structural design in which the active part is engaged and disengaged by the driven part in a swinging manner; such technologies include the "combination structure of the bicycle hub system" disclosed in Taiwan Utility Model Patent No. 111211577, China, and the "bicycle hub" disclosed in Taiwan Utility Model Patent No. 112206175, China.

[0004] "Linear" refers to a structural design in which the engagement and disengagement of the active element with the driven element is achieved through linear motion. This type of technology, such as the "bicycle hub" disclosed in Taiwan Patent No. 111146818, includes: a hollow tubular body with an internal toothed portion formed on the inner wall surface of one end of the body; a gear set housed at one end of the body and meshing with the internal toothed portion of the body; a sprocket seat rotatably coupled to the end of the body housing the gear set, with a ring gear disposed within the sprocket seat that meshes with the gear set, wherein the ring gear and the gear set mesh in a one-way transmission; and two shock-absorbing washers, each of which is abutted against either side of the gear set.

[0005] Another "linear" bicycle hub ratchet structure, such as the "bicycle transmission device ratchet structure" disclosed in Taiwan Utility Model Patent No. 112207964, includes: a first gear ring, the first gear ring having a circumferential surface and a side surface, the side surface having a plurality of first-side ratchet teeth arranged in a ring, each first-side ratchet tooth being a helical tooth having a supporting portion, the supporting portion having an outwardly convex arc surface, and; a second gear ring, the second gear ring having a circumferential surface and a side surface facing the first gear ring, the side surface of the second gear ring having a plurality of second-side ratchet teeth arranged in a ring; wherein the first-side ratchet teeth and the second-side ratchet teeth engage with each other.

[0006] The two prior art designs described above are linear bicycle hub ratchet structures, each featuring two ratchet rings meshing laterally. Each ratchet ring undergoes linear displacement along the hub axis, switching between two states: engaged and disengaged. Each ratchet ring directly drives the hub and sleeve seats to produce synchronized rotation. The first design primarily relies on the structure of its components, aside from the ratchet rings. The second design, however, is characterized by the shape and structure of the meshing ratchet teeth of the two ratchet rings.

[0007] However, the above two cases belong to the "linear" bicycle hub ratchet structure, which uses two meshing ratchet rings to directly drive the hub seat and the sleeve seat to produce synchronous rotation. Because the inner diameter of the hub seat and the outer diameter of the ratchet ring are both provided with a ring-shaped transmission gear structure that can mesh with each other, due to the large inner diameter of the hub seat, high processing technology is required to achieve the precision requirements, resulting in high processing and manufacturing costs; and, when riding, the ratchet teeth are engaged or disengaged, which makes the linear reciprocating motion of the ratchet ring quite frequent and unsteady. This can be avoided, but it is also easy to cause wear of the meshing gear structure. If maintenance is required, the entire hub seat must be replaced, which makes the maintenance cost too high. On the other hand, when not pedaling, the two ratchet rings are in a disengaged state. Whether the existing technology uses spring elastic force to drive or magnetic attraction to bring the two ratchet rings close to each other, the ratchets on both sides that cannot be fully engaged repeatedly and continuously contact and rub against each other in the engaged and disengaged states, and produce a clicking sound. This design of forcing the two ratchets to be close in one direction can easily accelerate the wear of the ratchets and shorten their service life. Utility Model Content

[0008] In view of this, the utility model discloses a ratchet structure of a bicycle hub, which is arranged between a hub seat and a sleeve seat, and the sleeve seat is located on one side of the hub seat with one end thereof, and comprises: a wheel axle group, having a wheel axle passing through the axis of each hub seat and the sleeve seat, at least one first bearing sleeved between each wheel axle and the hub seat, and at least one second bearing sleeved between each wheel axle and the sleeve seat; a clutch ratchet group, which is sleeved outside the wheel axle and generates a linear action of ratchet meshing or separation switching in the axial direction of each hub seat and the sleeve seat, and comprises a first ratchet ring and a second ratchet ring made of magnetic material, one end face of the first ratchet ring is provided with a plurality of first ratchet teeth arranged radially, and one end face of the second ratchet ring is provided with a plurality of second ratchet teeth arranged radially, and can mesh with each first ratchet teeth and be in a state of magnetic field repulsion with each other, each first ratchet ring The other end edges of the ratchet ring and the second ratchet ring that are meshed with each other are respectively provided with an elastic element for providing a driving force for linear displacement of each first ratchet ring and the second ratchet ring in the meshing direction; a first transmission group, which has a first transmission seat sleeved outside the first ratchet ring, and a plurality of transmission tooth groups arranged in a ring shape are mutually meshed between the outer diameter edge of each first ratchet ring and the inner diameter edge of the first transmission seat, and a plurality of transmission tooth groups arranged in a ring shape are mutually meshed between the outer diameter edge of each second ratchet ring and the inner diameter edge of the sleeve seat; a second transmission group, which has a plurality of convex ribs arranged in a ring shape on the inner diameter edge of the hub seat, the outer diameter edge of the first transmission seat is provided with a plurality of grooves that are mutually engaged with the respective convex ribs, and a second transmission seat is sleeved between each hub seat and the sleeve seat, and its outer diameter edge is provided with a plurality of limiting grooves that are mutually engaged with the respective convex ribs, and the limiting grooves are groove-shaped with a preset length.

[0009] As a further technical solution, the inner diameter of each elastic element is larger than the inner diameter of the abutment portion of each first ratchet ring and the second ratchet ring.

[0010] As a further technical solution, the contact areas between each first ratchet ring, the second ratchet ring and each elastic element have a radially extending abutment edge, thereby increasing the contact area between each first ratchet ring, the second ratchet ring and each elastic element, and the inner diameter of each elastic element is larger than the inner diameter of each abutment edge.

[0011] As a further technical solution, each first bearing and second bearing respectively has an inner ring and an outer ring which are sleeved on each other, and a number of rolling elements are provided between each inner ring and outer ring; a bearing ring is provided between each first bearing and second bearing, and is sleeved on the outside of the wheel axle, and both end faces of the bearing ring respectively abut against the end faces of the inner rings of each first bearing and second bearing.

[0012] As a further technical solution, a bearing ring is provided between each first bearing and is sleeved on the outside of the wheel axle, and the two end surfaces of the bearing ring respectively abut against the inner ring end surfaces of each first bearing; a bearing ring is provided between each second bearing and is sleeved on the outside of the wheel axle, and the two end surfaces of the bearing ring respectively abut against the inner ring end surfaces of each second bearing.

[0013] As a further technical solution, an outer cover is provided between the end surface of the hub seat and the sleeve seat.

[0014] As a further technical solution, the elastic element is a conical spring.

[0015] As a further technical solution, the driving elastic force of each elastic element is greater than the magnetic field repulsive force between each first ratchet tooth and the second ratchet tooth.

[0016] As a further technical solution, a group of concave grooves are provided at a preset position in the sleeve seat to provide a position in which one end surface of the elastic element is arranged.

[0017] As a further technical solution, a positioning groove is axially recessed in a preset position inside the hub seat to provide a position in which one end surface of the elastic element is assembled.

[0018] Comparison with existing technologies:

[0019] The main purpose of the utility model is to provide a ratchet structure for a bicycle hub, which utilizes two ratchet rings in a magnetic repulsive state to generate a separation force, and cooperates with the elastic elements at the other ends of each ratchet ring to apply a similar force, so that each ratchet ring is in a floating state. When the friction force is greater than the elastic force and the repulsive force is added, the distance between the ratchet teeth on both sides is increased to reduce friction and increase the service life of the ratchet teeth.

[0020] A second object of the present invention is to provide a ratchet structure for a bicycle hub, which has two ratchet rings that magnetically repel each other, so that the teeth can be disengaged faster and more sensitively without pedaling.

[0021] Another object of the present invention is to provide a ratchet structure for a bicycle hub, wherein a first transmission seat is provided between each first ratchet ring and the hub seat, so that the first ratchet ring performs reciprocating linear displacement in the first transmission seat. If the transmission tooth portion is damaged, only the first transmission seat needs to be replaced without replacing the entire hub seat, which can effectively reduce maintenance costs.

[0022] Another object of the present invention is to provide a ratchet structure for a bicycle hub, wherein a first transmission seat is provided between each first ratchet ring and the hub seat, and transmission teeth are processed on the inner diameter of the first transmission seat. Since the inner diameter of the first transmission seat is much smaller than the inner diameter of the hub seat, the processing technology required for processing the transmission teeth is relatively low in difficulty and can meet the precision requirements, which can effectively reduce the processing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0024] FIG1 is a three-dimensional appearance diagram of a preferred embodiment of the present invention;

[0025] FIG2 is a perspective exploded view of a preferred embodiment of the present invention;

[0026] FIG3 is a cross-sectional view of a preferred embodiment of the present invention Figure 1 ;

[0027] FIG4 is a cross-sectional view of a preferred embodiment of the present invention Figure 2 ;

[0028] FIG5 is a schematic diagram of the operation of a preferred embodiment of the utility model Figure 1 ;

[0029] FIG6 is a schematic diagram of the operation of a preferred embodiment of the present utility model Figure 2 ;

[0030] FIG7 is a partially enlarged schematic diagram of a preferred embodiment of the present invention in a tooth-disengaging state.

[0031] Description of Reference Numerals

[0032] Hub seat 10;

[0033] Clutch ratchet group 30;

[0034] Sleeve seat 11;

[0035] first ratchet ring 31;

[0036] outer cover 12;

[0037] abutting the edge 311, 321;

[0038] Positioning groove 13;

[0039] a second ratchet ring 32;

[0040] Axle group 20;

[0041] first ratchet 33;

[0042] Axle 21;

[0043] Second ratchet 34;

[0044] First bearing 22;

[0045] elastic element 35;

[0046] inner ring 221, 231;

[0047] First transmission group 40;

[0048] Outer ring 222, 232;

[0049] First transmission seat 41;

[0050] Rolling elements 223, 233;

[0051] Transmission gear set 1 42;

[0052] Second bearing 23;

[0053] Transmission gear set 2 43;

[0054] bearing ring 24;

[0055] Second transmission group 50;

[0056] Group set slot 25;

[0057] rib 51;

[0058] groove 52;

[0059] Second transmission seat 53;

[0060] Limiting groove 54;

[0061] Inner diameter of the elastic element D;

[0062] The inner diameter of the abutment is d. DETAILED DESCRIPTION

[0063] First, please refer to Figures 1 to 4. The utility model provides a ratchet structure for a bicycle hub, which mainly includes: a hub seat 10 and a sleeve seat 11 assembled with the hub seat 10, an axle assembly 20, a clutch ratchet assembly 30, a first transmission assembly 40 and a second transmission assembly 50.

[0064] One end of the sleeve seat 11 is located inside one side of the flower hub seat 10; an outer cover 12 is provided between the end surface of the flower hub seat 10 and the sleeve seat 11, so that the sleeve seat 11 is firmly connected to the flower hub seat 10 and has dustproof and waterproof effects; a positioning groove 13 is axially recessed at a preset position inside the flower hub seat 10.

[0065] The wheel axle assembly 20 comprises a wheel axle 21 passing through the axis of each hub seat 10 and the sleeve seat 11; at least one first bearing 22 is sleeved between each wheel axle 21 and the hub seat 10; at least one second bearing 23 is sleeved between each wheel axle 21 and the sleeve seat 11; each first bearing and second bearing 2223 respectively comprises an inner ring 221, 231 and an outer ring 222, 232 sleeved with each other, and a plurality of rolling elements 223, 233 are provided between each inner ring 221, 231 and the outer ring 222, 232; a bearing ring 24 is provided between each first bearing 22 and the second bearing 23, and Sleeved on the outside of the wheel axle 21, the two end surfaces of the bearing ring 24 respectively abut against the end surfaces of the inner rings 221 and 231 of the first bearing 22 and the second bearing 23; a bearing ring 24 is provided between each first bearing 22 and sleeved on the outside of the wheel axle 21, and the two end surfaces of the bearing ring 24 respectively abut against the end surfaces of the inner rings 221 of each first bearing 22; a bearing ring 24 is provided between each second bearing 23 and sleeved on the outside of the wheel axle 21, and the two end surfaces of the bearing ring 24 respectively abut against the end surfaces of the inner rings 231 of each second bearing 23; a group of concave grooves 25 are provided at a preset position in the sleeve seat 11.

[0066] The clutch ratchet group 30 is sleeved outside the wheel axle 21 and generates a linear action of ratchet engagement or separation switching in the axial direction of each hub seat 10 and sleeve seat 11. It has a first ratchet ring 31 and a second ratchet ring 32 made of magnetic material; one end surface of the first ratchet ring 31 is provided with a plurality of first ratchet teeth 33 arranged radially; one end surface of the second ratchet ring 32 is provided with a plurality of second ratchet teeth 34 arranged radially, and can be engaged with each first ratchet teeth 33 and are in a state of magnetic field repulsion; the other end edge of each first ratchet ring 31 and the second ratchet ring 32 that are engaged is respectively provided with an elastic element 35, providing each first ratchet ring 31 and the second ratchet ring 32 respectively drive forces for linear displacement in the meshing direction; the driving elastic force of each elastic element 35 is greater than the magnetic field repulsion force between each first ratchet 33 and the second ratchet 34; the mutually abutting parts of each first ratchet ring 31, the second ratchet ring 32 and each elastic element 35 protrude radially with an abutting edge 311, 321, so that the mutually abutting area of ​​each first ratchet ring 31, the second ratchet ring 32 and each elastic element 35 is increased; and the inner diameter D of each elastic element 35 is greater than the inner diameter d of each abutting edge 311, 321; the other end of the elastic element relative to each first ratchet ring 31 and the second ratchet ring 32 abuts against each positioning groove 13 and the assembly groove 25 respectively.

[0067] The elastic element 35 can be a conical spring or other types of springs, leaf springs, coil springs, flat springs, vortex springs, or other elastic plastics.

[0068] The first transmission group 40 has a first transmission seat 41 sleeved outside the first ratchet ring 31. A plurality of transmission tooth groups 42 arranged in a ring shape engage with each other between the outer diameter edge of each first ratchet ring 31 and the inner diameter edge of the first transmission seat 41 to generate synchronous rotation transmission; a plurality of transmission tooth groups 43 arranged in a ring shape engage with each other between the outer diameter edge of each second ratchet ring 32 and the inner diameter edge of the sleeve seat 11 to generate synchronous rotation transmission.

[0069] The second transmission group 50 has a plurality of ribs 51 arranged in a ring shape on the inner diameter edge of the hub seat 10, which have a preset length; the outer diameter edge of the first transmission seat 41 is provided with a plurality of grooves 52 that are mutually engaged with the ribs 51, so that the first transmission seat 41 is firmly sleeved in the hub seat 10 and rotates synchronously; a second transmission seat 53 is sleeved between each hub seat 10 and the sleeve seat 11, and its outer diameter edge is provided with a plurality of limiting grooves 54 that are mutually engaged with the ribs 51, so that the second transmission seat 53 is sleeved in the hub seat 10 and rotates synchronously; the limiting groove 54 is a groove with a preset length, which can limit the displacement of the sleeve seats 11 and the second transmission seat 53 connected in combination toward the hub seat 10.

[0070] Through the above-mentioned components, the first ratchet rings 31 and the second ratchet rings 32 in a magnetic repulsive state generate a separation force, and the elastic elements 35 at the other ends of the first ratchet rings 31 and the second ratchet rings 32 apply a similar force, so that the first ratchet rings 31 and the second ratchet rings 32 are in a floating state. When the friction force is greater than the elastic force and the repulsive force is added, the first ratchet teeth 33 and the second ratchet teeth 34 on both sides can increase the separation distance between them to reduce friction and increase the service life of the ratchet teeth. The tooth-disengaging action without stepping on is faster and more sensitive, and the processing technology required for the transmission tooth processing of the first transmission group 40 is relatively low in difficulty and can meet the precision requirements, which can effectively reduce the processing cost. If the transmission tooth part is damaged, only the first transmission seat 41 or the first ratchet ring 31 needs to be replaced, and there is no need to replace the entire hub seat, which can effectively reduce the maintenance cost. Therefore, the overall structure can be convenient and practical.

[0071] In order to further understand the structural features, applied technical means and expected effects of the present invention, the use of the present invention is described as follows:

[0072] When the present invention is in the pedaling state, that is, when the bicycle body is moving forward, please refer to Figure 5. When the pedal pulls the chain system and drives each sleeve seat 11 and the second transmission seat 53 to rotate synchronously toward the front of the bicycle body, each first ratchet 33 and the second ratchet 34 are in a complete meshing state, and then the first ratchet 33 links each first ratchet ring 31, the first transmission seat 41 and the hub seat 10 to rotate in the same direction, and the wheel also rolls forward synchronously.

[0073] When the present invention is not in the pedaling state, please refer to Figures 6 and 7. The sleeve seat 11 stops rotating, and each first ratchet ring 31, the first transmission seat 41 and the hub seat 10 continue to rotate toward the front of the bicycle body due to inertia. At this time, each first ratchet 33 and the second ratchet 34 are in the original meshing state. Because the second ratchet ring 32 does not rotate, the first ratchet 33 moves along the inclined surface of the second ratchet 34 to the top tooth portion, and then falls into the bottom tooth portion of the next ratchet. Each first ratchet 33 and the second ratchet 34 collide and produce a clicking sound. In this way, the first ratchet 33 and the second ratchet 34 are repeatedly displaced back and forth between the top and the bottom point of each second ratchet 34. This is the disengaged state of each first ratchet 33 and the second ratchet 34. The bicycle hub is in an idling state without doing work, but the bicycle body can still move forward continuously.

[0074] The elastic element 35 of the present invention is a conical spring. Utilizing the stackable and compressible properties of conical springs, the coils of the springs are stacked inwards in the compressed state, and can even be stacked into a flat surface. When stretched to its natural state, the width is also short, thereby taking up less space. The extra space allows for the adaptation of other components to different shapes and sizes.

[0075] The bicycle hub ratchet structure provided by the present invention primarily utilizes the magnetic repulsion between the first and second ratchet rings 31, 32 to generate a separation force, coupled with elastic elements 35 provided at the other ends of the first and second ratchet rings 31, 32 to apply a similar force, and combined with the structural design of the first and second transmission groups 40, 50 for indirect transmission, to achieve the following benefits:

[0076] First, the present invention utilizes the magnetic repulsive state of the first and second ratchet rings 31, 32 to generate a separation force, and cooperates with the elastic elements at the other ends of the first and second ratchet rings 31, 32 to apply a similar force, so that the first and second ratchet rings 31, 32 are in a floating state. During the linear movement, the first and second ratchet rings 31, 32 are respectively subjected to changes in the forces on both sides, automatically balancing the repulsive forces and the elastic forces on both sides at any time. When the teeth are disengaged, if the friction force is greater than the elastic force and the repulsive force is added, the first and second ratchet teeth 33, 34 on both sides are automatically separated from each other to reduce friction and increase the service life of the ratchet teeth, thereby solving the various problems caused by the constant hard-to-hard wear between the existing ratchet teeth.

[0077] 2. The present invention has the first ratchet ring 31 and the second ratchet ring 32 that magnetically repel each other. When the gear is not being disengaged and the user is not stepping on the gear, the repulsive force helps the gear disengagement to be faster and more sensitive.

[0078] 3. A first transmission seat 41 is provided between each first ratchet ring 31 and the hub seat 10, and a transmission gear is provided between each first ratchet ring 31 and the first transmission seat 41 in an indirect transmission structure design, so that the first ratchet ring 31 can perform reciprocating linear displacement in the first transmission seat 41. If the transmission tooth portion is damaged, only the first transmission seat 41 or the first ratchet 31, which are smaller components and lower in cost, needs to be replaced, without replacing the entire hub seat, thereby reducing the wear of the hub seat and effectively reducing the maintenance cost, thereby solving the existing problem of needing to replace the entire hub seat when the transmission tooth portion is damaged and the high maintenance cost.

[0079] Fourth, a first transmission seat 41 is provided between each first ratchet ring 31 and the hub seat 10, and transmission teeth are machined on its inner diameter. Since the inner diameter of the first transmission seat 41 is much smaller than the inner diameter of the hub seat 10, the processing technology required for processing the transmission teeth is relatively low, that is, it is easy to meet the precision requirements, which can effectively reduce the processing cost and solve the existing problem of high processing technology and high processing cost of transmission gears caused by the large inner diameter of the hub seat.

[0080] 5. The second transmission seat 53 is assembled between each sleeve seat 11 and the hub seat 10, and the indirect transmission structure design is used so that the sleeve seat 11, which often rotates, is not directly assembled with the hub seat 10, and the worn parts are transferred to the second transmission seat 53. If maintenance is required, the second transmission seat 53 can be replaced without replacing the entire hub seat, thereby reducing the wear of the hub seat and effectively reducing the maintenance cost. It solves the existing problem of needing to replace the entire hub seat due to damage to the transmission teeth and the high maintenance cost.

[0081] 6. The positioning grooves 13 and assembly grooves 25 respectively provided in the hub seat 10 and the sleeve seat 11 are mainly used to provide each elastic element 35 with a stable assembly in each hub seat 10 and the sleeve seat 11, thereby achieving a positioning effect.

[0082] 7. The structural design of the second transmission seat and the hub of the utility model, which are connected by various protrusions and limiting grooves, not only can position the two components, but also has a transmission function that causes the two to rotate synchronously. The limiting groove further has a limiting function to limit the position of the second transmission seat from being inaccurate during assembly, thereby improving the accuracy of assembly.

[0083] 8. The present invention further provides respective abutment edges 311, 321 on the inner diameter edges of the abutment portions of the first ratchet ring 31, the second ratchet ring 32 and the elastic elements 35, which are flanges extending radially toward the center at a certain height; the inner diameter dimension of each abutment edge 311, 321 is set to d, and the inner diameter dimension of each elastic element is set to D. Therefore, when the inner diameter dimension D of each elastic element 35 is set to be larger than the inner diameter dimension d of each abutment edge 311, 321, it is possible to prevent each elastic element 35 from falling into each first ratchet ring 31, the second ratchet ring 32, so that the elastic force of the linear drive fails. At the same time, each abutment edge 311, 321 can increase the abutment area with each elastic element 35. If each elastic element 35 shakes during operation, it can still effectively abut against the end faces of the abutment edge 311, 321, thereby reducing the occurrence of the elastic element 35 being detached.

[0084] In summary, the "ratchet structure of a bicycle hub" disclosed in the present invention provides a ratchet structure of a hub that can reduce wear, make the tooth disengagement action faster and more sensitive when not pedaling, and reduce maintenance and processing costs. It mainly utilizes the first ratchet rings and the second ratchet rings in a magnetic repulsive state to generate a separation force, and cooperates with the elastic elements at the other ends of the first ratchet rings and the second ratchet rings to apply a similar force, so that the first ratchet rings and the second ratchet rings are in a floating state. Combined with the structural design of the first transmission seat and the second transmission seat indirectly transmitting between the hub seat and the sleeve seat, the wear and damage are transferred to the first transmission seat, the second transmission seat and the first ratchet ring and the second ratchet ring of the small components, so there is no need to replace the entire hub seat. At the same time, the first ratchet rings and the second ratchet rings are in a floating state with automatic balance of force on both sides, which makes the clutch action of the first ratchet rings and the second ratchet rings more flexible, so the overall structure is convenient and practical.

[0085] The above are specific embodiments of the present invention and the technical principles used. If changes are made based on the concept of the present invention and the resulting functions and effects do not exceed the spirit covered by the description and drawings, they should be within the scope of the present invention.

Claims

1. A ratchet structure for a bicycle hub, characterized in that: It is located between a hub seat and a sleeve seat, and one end of the sleeve seat is located inside one side of the hub seat, and includes: An axle assembly includes an axle passing through the axis of each hub seat and sleeve seat, at least one first bearing sleeved between each axle and hub seat, and at least one second bearing sleeved between each axle and sleeve seat; a clutch ratchet assembly, sleeved outside the wheel axle and generating a linear action of ratchet engagement or disengagement switching in the axial direction of each hub seat and sleeve seat, comprising a first ratchet ring and a second ratchet ring made of magnetic material, one end surface of the first ratchet ring being provided with a plurality of first ratchet teeth arranged radially, and one end surface of the second ratchet ring being provided with a plurality of second ratchet teeth arranged radially, which mesh with each of the first ratchet teeth and are in a state of magnetic field repulsion, and the other end edge of each meshing first ratchet ring and second ratchet ring being provided with an elastic element for providing a driving force for linear displacement of each first ratchet ring and second ratchet ring in the meshing direction; a first transmission assembly having a first transmission seat sleeved outside the first ratchet ring, wherein a plurality of transmission teeth of annularly arranged first group mesh with each other between the outer diameter edge of each first ratchet ring and the inner diameter edge of the first transmission seat, and a plurality of transmission teeth of annularly arranged second group mesh with each other between the outer diameter edge of each second ratchet ring and the inner diameter edge of the sleeve seat; A second transmission group has a plurality of ribs arranged in a ring shape on the inner diameter edge of the hub seat, a plurality of grooves are provided on the outer diameter edge of the first transmission seat, and the grooves are engaged with the ribs. A second transmission seat is sleeved between each hub seat and the sleeve seat, and a plurality of limiting grooves are provided on the outer diameter edge of the second transmission seat, and the limiting grooves are grooves with a preset length.

2. The ratchet structure of the bicycle hub according to claim 1, wherein: The inner diameter of each elastic element is larger than the inner diameter of the abutting portion of each first ratchet ring and the second ratchet ring.

3. The ratchet structure of the bicycle hub according to claim 1, wherein: The contact areas between the first and second ratchet rings and the elastic elements have an abutment edge projecting radially, thereby increasing the contact areas between the first and second ratchet rings and the elastic elements. The inner diameter of each elastic element is larger than the inner diameter of each abutment edge.

4. The ratchet structure of the bicycle hub according to claim 1, wherein: Each first bearing and second bearing respectively has an inner ring and an outer ring that are sleeved on each other, and a number of rolling elements are provided between each inner ring and outer ring; a bearing ring is provided between each first bearing and second bearing and sleeved on the outside of the wheel axle, and both end surfaces of the bearing ring respectively abut against the inner ring end surfaces of each first bearing and second bearing.

5. The ratchet structure of a bicycle hub according to claim 1, wherein: A bearing ring is provided between each first bearing and is sleeved on the outside of the wheel axle. The two end surfaces of the bearing ring respectively abut against the inner ring end surfaces of each first bearing; a bearing ring is provided between each second bearing and is sleeved on the outside of the wheel axle. The two end surfaces of the bearing ring respectively abut against the inner ring end surfaces of each second bearing.

6. The ratchet structure of a bicycle hub according to claim 1, wherein: An outer cover is provided between the end surface of the hub seat and the sleeve seat.

7. The ratchet structure of a bicycle hub according to claim 1, wherein: The elastic element is a conical spring.

8. The ratchet structure of a bicycle hub according to claim 1, wherein: The driving elastic force of each elastic element is greater than the magnetic field repulsive force between each first ratchet tooth and the second ratchet tooth.

9. The ratchet structure of a bicycle hub according to claim 1, wherein: A set of concave grooves are provided at a preset position in the sleeve seat, which are used to provide a position where one end surface of the elastic element is arranged.

10. The ratchet structure of a bicycle hub according to claim 1, wherein: A positioning groove is axially recessed in a predetermined position inside the hub seat to provide a position in which one end surface of the elastic element is assembled.

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