TWM615924U - Hub ratchet structure of gicycle - Google Patents

Abstract

This creation mainly provides a bicycle hub ratchet structure, which includes: a ratchet wheel set between a hub seat and a sleeve set, and a ring on the side of the hub seat corresponding to the socket set There are a number of oblique grooves with preset depths. The axis of each of the oblique grooves is non-parallel to the axis of the axle. A ratchet ring is sleeved on the socket and between the hub seat. The ratchet ring is provided with a plurality of ratchet teeth arranged in a ring shape with a predetermined interval relative to the edge surface of each of the inclined grooves, each of the ratchet teeth is flange-shaped, and one of the predetermined edge surfaces is arcuate and one meshes The arc surface is provided with a cylindrical pawl member in each of the oblique grooves, which can respectively correspond to a part of each of the ratchet teeth. When each of the pawl members and the ratchet teeth are engaged, a part of the pawl member The edge surface will fit the meshing arc surface, and an elastic group is provided between the bottom of the oblique groove and the pawl member, so that the pawl member can be moved linearly toward each ratchet tooth automatically, so that each pawl member And the ratchet teeth mesh with each other; thereby, the pawl piece is used to switch between meshing and non-meshing with the linear displacement of the preset inclination angle, and the larger area of the arc surface between the pawl and the ratchet is fit to facilitate the force The transmission can effectively improve the driving force, increase the sensitivity of meshing switching, and shorten the delay time of pedaling. At the same time, each pawl piece moves directly without any force, which can reduce power consumption and reduce the meshing or leaving position between ratchet teeth. The situation of mutual interference.

Description

Flower hub ratchet structure of bicycle

This creation is about a ratchet structure with one-way rotation drive, especially a kind of wheel hub seat used in a bicycle. When the sleeve seat is driven by a chain device, it can indirectly drive the hub seat to rotate and drive in only one direction. Actuator who rotates in the other direction and rotates idling.

The advancement of the bicycle is mainly driven by pedaling with the foot and driving the crank to rotate, which is driven by the chain device to the flywheel on the rear wheel to drive the sleeve set and hub seat connected with the flywheel, and then the rear wheel rotates to cause the body to move. March forward. In addition, in order to make the wheel continue to advance according to its inertia when it is not stepped on, a ratchet set is installed between the hub seat and the sleeve set for rotating work in the forward direction, and a ratchet set that rotates idly when rotating in the opposite direction.

The ratchet structure of a bicycle, its main components include a ratchet ring, ratchet teeth, pawls, and elastic parts. The ratchet ring is mostly fixed inside the hub seat, and the inner ring of the ratchet ring is provided with several The ratchet teeth. The ratchet pawls often have several loops and are pivotally connected to one of the side end surfaces of the sleeve seat, and maintain the action within a preset range, and then cooperate with an elastic member to provide an elastic force for each of the pawls, so that the pawls It can be externally rotated at a constant distance to expose the state of its meshing end to facilitate the meshing with the ratchet for transmission.

Further analysis of the technical application of the pawl, according to the meshing structure of the pawl can be divided into "pawl type" and "spindle type", among which the "pawl type" is a single element with a single ratchet structure at the preset position. To engage one of the ratchet teeth on the ratchet ring, this kind of structure is like the "clutch hub structure" disclosed in the domestic new patent No. 108202194; the "spindle type" is to have more than two in the preset position of a single element The ratchet tooth structure is used to engage more than two ratchet teeth on the ratchet ring. This kind of structure is as disclosed in the domestic invention patent No. 101126603 "Clutch Drive System for Bicycle Wheel Hub".

Press again, according to the ratchet tooth engagement position of the ratchet ring, it can be divided into "lateral engagement" and "inner diameter engagement", where "lateral engagement" means that the ratchet structure is set on the side surface of the ratchet ring. This kind of structure is like the one-way ratchet structure of the disc surface meshing of a bicycle hub disclosed in the domestic new patent No. 101203883; the “inner diameter meshing” means that the ratchet structure is arranged on the annular inner diameter edge of the ratchet ring. Such a structure is the "Rear Wheel Hub Ratchet Tube Assembly" disclosed in the domestic invention patent No. 105135384.

According to another press, the engagement action mode of the pawl can be divided into "rotating pendulum meshing" and "linear meshing". The "rotating pendulum meshing" refers to the switching of the pawl's meshing or non-meshing state by rotating pendulum displacement action. The structure of "swivel engagement" is the "rear wheel hub ratchet cylinder assembly" disclosed in the domestic new patent No. 105216628; "linear engagement" means that the engagement of the pawl is switched by linear displacement action to generate engagement or non-engagement. Such a structure is the "ratchet structure of bicycle hub" disclosed in the domestic invention patent No. 098141871.

As mentioned above, a rough analysis of the conventional bicycle hub technology can distinguish a number of technical application differences. It can be seen that the bicycle hub technology is not just the principle application of the ratchet structure, but the shape, structure, combination method and actuation method of each component. The change of the shape can make the meshing drive of the ratchet structure produce different effects and economic benefits.

Further analysis of the aforementioned conventional ratchet structure technology, compared with the "ratchet type" structure, the "pawl type" is smaller and lighter in structure, and each pawl is actuated by a single ratchet tooth, so it meshes And the departure action is quicker and more sensitive, which can shorten the delay time of pedaling start; comparing "side meshing" and "inner diameter meshing", then "inner diameter meshing" because the meshing direction of the ratchet ring is the same as the direction of wheel rotation , And the meshing direction of "lateral meshing" is 90 degrees to the direction of wheel rotation. Therefore, compared with "lateral meshing", the "inner diameter meshing" structure has a higher efficiency in the improvement of drive and rotational inertia; another analysis The technology of "rotating pendulum meshing" and "linear meshing", when the pawl rotates the pendulum, the force of the movement will be generated and there will be power loss, so that the clutch between the ratchet teeth is less sensitive. It is more cautious than " Rotary pendulum meshing method, when the ratchet teeth are actuated in the linear pendulum meshing mode, it is easy to cause the ratchet teeth to mesh or leave the position not in place due to the inaccurate clutch action. In the case of mutual interference, the moving force moves directly without any component, which can reduce power loss and improve the sensitivity of engagement and separation.

See the analysis of the various types of ratchet structures mentioned above. In response to the aforementioned conventional problems, the author of this case, whichever is the best technical structure application, proposes a solution that can solve the common problems of the ratchet structure of the conventional bicycle hub, in addition to improving the sensitivity of the ratchet clutch action and shortening In addition to stepping start time, reducing movement loss and effectively maintaining a better rotation driving force, it further strengthens the transmission of force between ratchet teeth to enhance the bicycle hub ratchet structure of driving force.

In view of this, the bicycle hub ratchet structure disclosed in this creation includes: a ratchet wheel set between a hub seat and a socket set, and a hub seat corresponding to the socket set The side upper ring is provided with a number of oblique grooves with preset depths, and the slot axis of each oblique groove is non-parallel to the axis of the axle, and a ratchet ring is sleeved on the bearing and between the hub seat , On the edge surface of the ratchet ring relative to each of the oblique grooves, there are a plurality of ratchet teeth arranged in a ring shape with a predetermined interval, each of the ratchet teeth is flange-shaped, and one of the predetermined edge surfaces is arcuate A meshing arc surface is provided with a cylindrical pawl member in each of the oblique grooves, which can correspond to a part of each ratchet tooth. When each ratchet member and ratchet tooth are meshed, the pawl The part of the edge surface of the piece will fit the arc surface of the engagement. An elastic piece is provided between the bottom of the oblique groove and the pawl piece to automatically move the pawl piece linearly in the direction of each ratchet, so that each of the The pawl piece and the ratchet tooth mesh with each other; through the above-mentioned components, the pawl piece is used to switch between meshing and non-meshing with the linear displacement of the preset inclination angle to match the larger area of the arc between the pawl and the ratchet tooth The fit is conducive to the transmission of power, which can effectively increase the driving force, increase the sensitivity of meshing switching, and shorten the delay time of stepping start. At the same time, each pawl piece moves directly without component force, which can reduce power consumption and reduce ratchets. In the case of mutual interference between the meshing or leaving positions, the overall structure can be convenient and practical.

The main purpose of this creation is to provide a bicycle hub ratchet structure, wherein the pawl It has a cylindrical shape, and the ratchet teeth on the ratchet ring have a meshing arc surface structure, so that each pawl and the ratchet teeth are attached to a larger area of arc surface to facilitate the transmission of force and increase the driving force.

The second purpose of this creation is to provide a bicycle hub ratchet structure. The pawl piece is meshed with a single ratchet and moves linearly in the direction of meshing movement, so that the meshing movement direction is non-parallel to the axis of the axle. The technology can effectively improve the transmission efficiency of the driving force, and make the pawl engage and leave the action quickly and reliably, so as to improve the sensitivity of the engagement switch and shorten the delay time of stepping on the start.

Another purpose of this creation is to provide a bicycle hub ratchet structure, the pawl of the linear movement meshing method, the moving force can be directly moved without any force, which can reduce the power loss and reduce the meshing or leaving the position of the ratchet teeth. Interference situation.

Another purpose of this creation is to provide a bicycle hub ratchet structure. The ratchet ring is a technology of inner diameter meshing. The meshing direction of the ratchet ring is the same as the wheel rotation direction, which helps the wheel to rotate inertia quickly. Upgrade, and has a better power-driven benefit.

[This Creation]

(10): Flower hub seat

(20): Socket set

(21): Socket seat

(22): Socket

(30): Ratchet group

(31): Inclined slot

(34): Detent pieces

(341): Side Curved Surface

(342)(343): end face

(35): Flexible group

(351): Spring element

(352): Magnetic element

(311): Linear direction

(32): Ratchet ring

(321): Embedded Hole

(33): Ratchet

(331): Meshing arc

(332): Move slope

(353): first magnetic element

(354): second magnetic element

(40): Axle

(41): Axis

(θ): Inclination

Figure 1 is a perspective view of a preferred embodiment of the creation.

Figure 2 is a three-dimensional exploded view 1 of a preferred embodiment of the creation.

Figure 3 is a second perspective exploded view of a preferred embodiment of the creation.

Figure 4 is a schematic cross-sectional plan view of a preferred embodiment of the creation.

Fig. 5 is a schematic cross-sectional view of a second embodiment of the creation of a preferred embodiment.

Figure 6 is a schematic diagram of the meshing state of a preferred embodiment of the creation.

Fig. 7 is a schematic diagram of a non-engaged state of a preferred embodiment of the creation.

Fig. 8 is a schematic diagram of the meshing state of the wheel rotating backward in creating a preferred embodiment. +

Figure 9 is a three-dimensional exploded view of the second embodiment of the creation.

Fig. 10 is a schematic cross-sectional plan view of the second embodiment of the creation.

Figure 11 is a schematic cross-sectional view of the second embodiment of the creation.

Figure 12 is a flat and three-dimensional exploded view of the third embodiment of the creation.

Figure 13 is a schematic plan view of the third embodiment of the creation.

First of all, please refer to Figures 1 to 5, a bicycle hub ratchet structure provided by this creation, which mainly includes: a hub seat (10), and a set on one side of the hub seat (10) The barrel group (20) and a ratchet wheel group (30) arranged inside each of the hub seat (10) and the sleeve group (20).

The hub seat (10) is pierced outside a wheel shaft (40) and can be smoothly rotated on the wheel shaft (40).

The sleeve set (20) is arranged on one side of the hub seat (10) and sleeved on the axle (40). It has a sleeve seat (21) for providing a flywheel set (not shown in the figure). Show) the installation location; on the other side of the sleeve seat (21) axially corresponding to the hub seat (10), there is a socket (22), the socket (22) is a polygonal column.

The ratchet wheel set (30) is arranged between each of the hub seat (10) and the socket set (20); on the side of the hub seat (10) corresponding to the socket set (30) there is a ring A number of oblique grooves (31) of preset depth; the axis of each of the oblique grooves (31) is non-parallel to the axis (41) of the axle (40); the axis of each oblique groove is set It is a linear direction (311).

A ratchet ring (32) is sleeved on the socket (22) and between the hub seat (10), and the central part of the ratchet ring (32) has a socket (22) that can be nested and embedded with each other An embedding hole (321) in the shape of a polygon; on the edge surface of the ratchet ring (32) opposite to each of the oblique grooves (31), there are a plurality of ratchet teeth (33) arranged in a ring shape with a preset interval, Each of the ratchet teeth (33) is flange-shaped, a predetermined edge surface of which is arcuate, and an engagement arc (331); each of the ratchet teeth (33) is the engagement arc (331) and a sliding inclined surface (332) is jointly composed.

Each of the oblique grooves (31) is provided with a cylindrical ratchet piece (34), which can correspond to a part of each ratchet tooth (33). When each ratchet piece (34) and ratchet tooth (22) When engaged, the cylindrical partial edge surface of the pawl piece (34) will fit the arc surface (331); it is set between the bottom of the inclined groove (31) and the pawl piece (34) There is an elastic group (35), so that the pawl piece (34) automatically faces each ratchet tooth (33) The direction is moved linearly, so that the pawl pieces (34) and the ratchet teeth (22) mesh with each other; the elastic group (35) can be a spring element (351), the two ends of which abut against the end surface (342) respectively And the bottom edge of the oblique groove (31); the pawl piece (34) is composed of a curved surface (341) and two end surfaces (342) (343) provided on both sides of the curved surface, one of The end surface (342) is attached to the elastic group (35), and the other end surface (343) and part of the side arc surface (341) are exposed in the inclined groove (31).

The linear direction (311) of each of the inclined grooves (31), that is, the linear displacement direction of each of the pawl members (34), is an inclination angle θ with the sliding inclined surface (332); the inclination angle θ is preferably 90 °; When each of the pawl pieces (34) mesh with the ratchet teeth (33), the side arc surface (341) exposed in the oblique slot (31) is attached to the mesh arc surface (331), exposed The end surface (343) of the inclined slot (31) is attached to the sliding inclined surface (332); when each of the pawl pieces (34) contacts the sliding inclined surface (32) and rotates in the non-driving direction, they are In the non-engaged idling state, the sliding inclined surface (332) can linearly move the pawl member (34) toward the inner direction of the inclined slot (31).

With the above-mentioned components, the pawl piece (34) is used to perform linear displacement at the preset inclination angle θ to produce meshing and non-engaging switching, and the pawl piece (34) and the ratchet tooth (33) are curved in cooperation with each other. The larger area fits to facilitate the transmission of force, which can effectively increase the driving force, increase the sensitivity of meshing switching, and shorten the delay time of stepping on the start. At the same time, each of the pawls (34) move to move directly without any force, which can reduce Power consumption is reduced, and the interference between the meshing or leaving positions of the ratchet teeth is reduced, so the overall structure can be convenient and practical.

In order to further understand the structural characteristics of this creation, the use of technical means and the expected effects, the method of use of this creation is described as follows:

For the meshing state of this creation, that is, the pedaling driving state when the wheel is moving forward, please refer to Figure 6. Each pawl piece (34) always faces each ratchet tooth (33) due to the elastic force of the elastic group (35) When the sleeve set (20) is driven, the sleeve sets (20) and the ratchet ring (32) rotate synchronously. When the ratchet ring (32) rotates to the pawl pieces (34) When the ratchet teeth (33) are in meshing state, each of the pawls (34), the ratchet wheel set (30) and the hub seat (20) are synchronously driven to rotate toward the front of the vehicle body, and the drive is in an effective state, and the wheels are Able to spin forward.

The non-meshing state of this creation, that is, the idling state without pedaling when the wheels are moving forward, please Referring to Figure 7, each of the pawl members (34) is still constantly moving in the direction of each of the ratchet teeth (33) due to the elastic force of the elastic group (35). When the sleeve group (20) stops rotating, each The sleeve set (20) and ratchet ring (32) stop rotating synchronously, because each of the pawl piece (34), ratchet wheel set (30) and hub seat (10) continue to rotate forward synchronously according to inertia, so that Each of the pawl pieces (34) in the rotating movement is pushed by the pushing inclined surface (332) to be separated from each of the ratchet teeth (33) in a non-engaged and de-toothed state, and each of the pawl pieces (34) is connected to its After the pushing of the sliding slope (332) is released, it will automatically rebound to fit the next sliding slope (332), and each of the pawl pieces (34) and the ratchet teeth (33) will continue to repeat this bonding and pushing It is a non-driving idling state, and the wheels are still spinning forward.

Please refer to Figure 8, which is the transmission state of the wheel retreating. When each of the pawls (34) is engaged with each of the ratchet teeth (33), if the wheel rotates backwards, the hub seat (10) will move toward The rear of the car body rotates, and synchronously drives each of the pawls (34), ratchet wheel set (30) and hub seat (20) to rotate toward the rear of the car body, and the drive is in a valid state, and the wheels can rotate toward the rear of the car body And back off.

This creation uses the pawl piece (34) to perform linear displacement at the preset inclination angle θ to produce meshing and non-engaging switching, which is matched with each pawl piece (34) and the ratchet tooth (33) in a curved surface fit. The structure design can effectively achieve the following effects:

1. The pawl piece (34) of this creation is cylindrical, and the ratchet tooth (33) on the ratchet ring (32) has a meshing arc surface (331) structure, so that each pawl piece (34) It fits with the ratchet teeth (33) on a large curved surface to facilitate the transmission of force and enhance the driving force.

2. The pawl piece (34) is a single ratchet tooth (33) meshing and linearly moving in the meshing moving direction, so that the meshing linear direction (331) and the axis (41) of the wheel shaft (40) are in a non-parallel state. The technology can effectively enhance the transmission efficiency of the driving force.

3. By linear movement of the pawl member (34) to generate the engagement drive switching in the clutch state, the engagement and separation actions of the pawl member (34) can be made quickly and surely, so as to improve the sensitivity of the engagement switching and shorten the stepping start time. delay.

4. The pawl member (34) is used to linearly move to produce the meshing drive switching in the clutch state, and the moving force can be moved directly without any force, which can reduce the power loss and reduce the interference between the meshing or leaving positions of the ratchet teeth.

5. Each of the pawl pieces (34) and ratchet ring (32) are meshed with inner diameters, and the meshing direction is designed with an inclination (θ) toward the advancing direction of the wheel, which can contribute to the rapid increase of the rotational inertia of the wheel, and It has better power-driven benefits.

Please refer to Figure 9 to Figure 11, which is the second embodiment of this creation, in which the ratchet ring (32) is screwed on the side edge of the sleeve seat (21); the elastic group ( 35) is the application of the principle of magnetism. It has a magnetic element (352) arranged on the end face of the pawl piece (34) corresponding to the ratchet ring (32); the ratchet ring (32) is made of metal Application: Utilizing the magnetic attraction of each of the magnetic elements (352) and the ratchet ring (32), the pawl piece (34) is automatically linearly displaced in the direction of the ratchet tooth (33).

In this embodiment, the sleeve seat (21) and the ratchet ring (32) are respectively provided with a male thread and a female thread. The pawl member (34) is moved linearly toward the ratchet ring (32) when the pawl member (34) is pushed by suction. When in action, it is the same as the first embodiment. When the pawl piece (34) and the ratchet tooth (33) are in meshing state, that is, when the pawl piece (34) is meshed with the meshing arc surface (331), then It can generate work rotation to drive the sleeve seat (21) and the hub seat (10) to rotate toward the front of the car body synchronously; when the pawl piece (34) and the ratchet teeth (33) are out of tooth State, that is, when the pawl member (34) is not engaged with the meshing arc surface (331), no idle rotation for work can be generated, and the rotating hub holder (10) will continue to rotate; or at each of the ratchets When the pawl (34) and the ratchet teeth (33) are in meshing state, the hub seat (10) is rotated toward the rear of the vehicle body, and synchronously drives the sleeve seat (21) and the hub seat (10) to synchronize Retreat towards the rear of the car body.

The other use states, assembly methods, device and component composition, operation and action methods, and expected effects of this embodiment are all the same as those of the first embodiment described above.

Please refer to Figures 12 to 13, which is the third embodiment of this creation, in which the ratchet ring (32) is integrally connected to the side edge of the sleeve seat (21); the elastic group ( 35) is the application of the principle of magnetism. It has a first magnetic element (353) arranged in a predetermined position in the inclined slot (31); a second magnetic element (354) is arranged in the corresponding inclined slot (31) ) On the end face of the pawl (34); using the repulsive magnetic effect between the first and second magnetic elements (353) (354), the pawl (34) automatically faces the ratchet ( 33) Linear displacement in direction.

This embodiment is mainly tied to each of the sleeve seat (21) and the ratchet ring (32). It can be used to directly process and set each ratchet tooth (33) on one side of the sleeve seat (21), or make each of the sleeve seat (21) and ratchet ring (32) one-piece Implementation mode; in conjunction with the elastic group (35) to push the pawl piece (34) linearly toward the ratchet ring (32) in a repulsive manner between the first and second magnetic elements (353) (354) move. The other use states, assembly methods, device and component composition, operation and action methods, and expected effects of this embodiment are all the same as those of the first embodiment described above.

Based on the above, the "bike hub ratchet structure" disclosed by this creation provides a bicycle ratchet structure with high driving force, fast meshing switching without interference, and reduced power loss of the pawl. It uses the pawl to prevent The linear displacement of the inclination angle produces the switching between meshing and non-meshing, and the larger area of the arc between the pawl and the ratchet is fitted to facilitate the transmission of force, which can effectively increase the driving force, increase the sensitivity of the meshing switch, and shorten the pedaling. The start delay time, and each of the pawls moves directly without any force, which can reduce power loss and reduce the interference between the ratchet teeth or the mutual interference between the positions of the ratchets, so as to make the whole industry practical and cost-effective. , And its structure has never been seen in books and periodicals or used publicly. It is in compliance with the requirements for a new patent application. I sincerely ask Jun Bureau to approve the patent as soon as possible. I really pray.

For those who need to be clarified, the above are the specific embodiments of this creation and the technical principles used. If changes are made according to the concept of this creation, the resulting functional effects still do not exceed the spirit covered by the specification and drawings. All times should be combined with Chen Ming within the scope of this creation.

(10): Flower hub seat

(20): Socket set

(21): Socket seat

(22): Socket

(30): Ratchet group

(31): Inclined slot

(32): Ratchet ring

(321): Embedded Hole

(33): Ratchet

(331): Meshing arc

(332): Move slope

(34): Detent pieces

(341): Side Curved Surface

(342)(343): end face

(35): Flexible group

(351): Spring element

(40): Axle

(41): Axis

Claims (11)

A flower hub ratchet structure for bicycles, which comprises: A flower hub seat, which is inserted outside a wheel shaft, and can be rotated smoothly on the wheel shaft; A sleeve set is arranged on one side of the hub seat and sleeved on the axle. It has a sleeve seat to provide a place for assembling a flywheel; A ratchet wheel set is set between the hub seat and the socket set. On the side of the hub seat corresponding to the socket set, a number of oblique grooves with preset depths are ringed, and each of the oblique grooves The axis of the slot hole is non-parallel to the axis of the axle. A ratchet ring is sleeved on the socket and between the hub seat. The edge surface of the ratchet ring relative to each of the oblique grooves is provided with a There are a number of ratchet teeth arranged in a ring shape at intervals, each of the ratchet teeth is flange-shaped, a predetermined edge surface of which is arcuate and an engaging arc surface, and each of the oblique grooves is provided with one of the cylindrical shapes. The pawl piece can respectively correspond to a part of each of the ratchet teeth. When each of the pawl pieces and the ratchet teeth are engaged, the partial edge surface of the pawl piece will fit the meshing arc surface at the bottom of the inclined groove An elastic group is arranged between the pawl member and the pawl member to automatically move the pawl member linearly in the direction of the ratchet teeth, so that the pawl member and the ratchet teeth mesh with each other. According to the bicycle hub ratchet structure described in item 1 of the scope of patent application, when each of the pawls and ratchet teeth are meshed, the sleeve seat rotates in a preset direction to drive each of the socket, ratchet ring and The hub seat rotates in the same direction; when the sleeve seat rotates in the opposite direction, the sockets and the ratchet ring rotate in the opposite direction synchronously, and the ratchet teeth on the ratchet ring do not mesh with the pawls. Idling state. According to the bicycle hub ratchet structure described in item 1 of the scope of patent application, each of the ratchet teeth is composed of the meshing arc surface and a sliding inclined surface, wherein when each of the pawls contacts the sliding inclined surface and faces the non-driving direction When rotating, it is in a non-engaged idling state, and the sliding inclined surface can linearly move the pawl member toward the inclined slot. According to the bicycle hub ratchet structure described in item 1 of the scope of patent application, which A socket is provided on the other side of the hub socket axially corresponding to the sleeve socket, which is a polygonal column shape; the central part of the ratchet ring has a shape that can be nested and embedded with the socket. One of the polygons is embedded with a hole. According to the bicycle hub ratchet structure described in item 1 of the scope of patent application, the ratchet ring is screwed on the side edge of the sleeve seat. According to the bicycle hub ratchet structure described in item 1 of the scope of patent application, the ratchet ring is integrally connected to the side edge of the sleeve seat. According to the bicycle hub ratchet structure described in item 3 of the scope of patent application, the pawl member is composed of a curved surface on one side and two end surfaces provided on both sides of the curved surface, and one end surface is connected to the elastic assembly. The other end surface and part of the side arc surface are exposed in the oblique groove; when each of the pawl pieces is engaged with the ratchet teeth, the side arc surface exposed in the oblique groove is attached to The engagement arc surface, which is exposed on the end surface of the oblique slot, is attached to the pushing oblique surface. According to the bicycle hub ratchet structure described in item 3 of the scope of patent application, the axis of each inclined groove is set to a linear direction, that is, the linear displacement direction of each pawl piece, and the linear direction is the same as the sliding inclined plane A mutual inclination angle θ. According to the bicycle hub ratchet structure described in item 8 of the scope of patent application, the inclination angle θ is 90°. According to the bicycle hub ratchet structure described in item 1 of the scope of patent application, the elastic group can be a spring element, the two ends of which abut against the end surface and the bottom edge of the inclined groove respectively. According to the bicycle hub ratchet structure described in item 1 of the scope of patent application, the elastic group is an application of the principle of magnetism, and has a magnetic element arranged on the end surface of the pawl member corresponding to the ratchet ring; The gear ring is the application of metal material; using each of the magnetic elements According to the mutually attracting magnetic effect of the ratchet ring and the ratchet ring, the pawl member automatically linearly shifts in the direction of the ratchet tooth.

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