Ratchet wheel structure of bicycle hub and bicycle

Abstract

The utility model provides a ratchet wheel structure of a bicycle hub and a bicycle, and relates to the technical field of bicycles, the ratchet wheel structure comprises a shaft core, a hub seat and a tower footing, the shaft core is sleeved with the hub seat and the tower footing, a first gear ring is arranged at one end, facing the tower footing, of the hub seat, and a second gear ring is arranged on the tower footing corresponding to the first gear ring. First meshing teeth and second meshing teeth are formed on the end face of the first gear ring and the end face of the second gear ring respectively, the number of the meshing teeth on each gear ring is 40-45, elastic pieces are arranged between the first gear ring and the hub seat and between the second gear ring and the tower footing, and the elastic pieces are connected with the first gear ring and the second gear ring. And the first meshing teeth are meshed with the second meshing teeth in a one-way mode. Therefore, the problem that an existing axially-clamped bicycle hub structure is large in spring abrasion is solved, meanwhile, the meshing angle of the meshing teeth can be reduced by increasing the number of the meshing teeth, the response time of the ratchet wheel structure is shortened, and the riding efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a bicycle technical field, specifically, a kind of ratchet structure of bicycle hub and bicycle. BACKGROUND

[0002] The structure of bicycle hub is the important factor to determine the performance of bicycle, the ratchet structure of the bicycle hub of the existing axial clamping is mostly like the self-acting bicycle hub and bicycle disclosed in Chinese patent CN219044252U, including shell, tower base, ratchet wheel and elastic member, the outer periphery of ratchet wheel is formed with inclined external spline, the inner periphery of shell is provided with internal spline matched with external spline, the rear end of ratchet wheel is provided with first meshing tooth, the front end of tower base is provided with second meshing tooth, and elastic member is arranged between shell and ratchet wheel to make first meshing tooth and second meshing tooth one-way meshing.In this structure, since second meshing tooth is directly formed on tower base, ratchet wheel can only compress single-side spring to move, which leads to the wear of the spring, and the spring is prone to failure, causing the problem of short service life of hub.In addition, the number of meshing teeth in the existing axial clamping ratchet wheel is generally 32 or 36 teeth, and the meshing angle of each meshing tooth is relatively large, so the response speed is slow, which leads to the decline of user experience. SUMMARY

[0003] The utility model discloses a kind of ratchet structure of bicycle hub, to improve the problem of the existing axial clamping bicycle hub structure spring wear and experience is not good.

[0004] The utility model discloses a kind of ratchet structure of bicycle hub, to improve the problem of the existing axial clamping bicycle hub structure spring wear and experience is not good.

[0005] A kind of ratchet structure of bicycle hub, including shaft core and the hub seat and tower base of the sleeve set on the shaft core, the first tooth ring is configured with to the end of the hub seat towards the tower base, the second tooth ring is configured with to the tower base corresponding the first tooth ring, the end face of the first tooth ring and the second tooth ring is respectively formed with first meshing tooth and second meshing tooth, the number of meshing teeth on each tooth ring is 40-45 teeth, wherein, the first tooth ring and the second tooth ring are configured with elastic member between the hub seat and the tower base, to make the first meshing tooth and the second meshing tooth one-way meshing.

[0006] As further improvement, the structure of the first tooth ring and the second tooth ring is same.

[0007] As further improvement, spline is provided on the outer peripheral wall of tooth ring and extends along the axial direction, and the spline groove matched with the spline is provided on the hub seat and the tower base to realize the circumferential transmission.

[0008] As further improvement, assembly cavity for installing the elastic member is formed on the side of tooth ring away from meshing tooth.

[0009] As a further improvement, the number of the meshing teeth on the ring gear is 45 teeth, and the height of each tooth is not less than 0.85mm.

[0010] As a further improvement, the width of the meshing teeth is 1.78mm.

[0011] As a further improvement, the meshing teeth are arranged along the circumferential direction of the ring gear and have inclined surfaces arranged along the circumferential direction, and the inclination angle of the inclined surfaces is 25°.

[0012] As a further improvement, the cross-sectional shape of the meshing teeth is triangular.

[0013] As a further improvement, the tip end of the meshing teeth is provided with a transition surface with a width not less than 0.03mm.

[0014] Also provided is a bicycle comprising a bicycle body and a ratchet structure of the bicycle hub as claimed in any one of the above.

[0015] By adopting the above technical solutions, the following technical effects can be achieved:

[0016] 1. The ratchet structure is arranged on the two tooth rings respectively arranged on the hub seat and the tower base, and elastic members are arranged between the hub seat and the first tooth ring and between the tower base and the second tooth ring, so that the two elastic members on both sides can jointly bear the pressure generated in the rotation process during the engagement transmission or the skipping idling of the first meshing teeth and the second meshing teeth, the one-way wear is reduced, and the service life of the hub is prolonged. At the same time, the elastic members arranged at both ends can better balance the stress of the wheel during rotation, so that the stability of the hub is better. In addition, the two tooth rings are designed in a split manner, which is conducive to the replacement and maintenance of the ratchet structure and reduces the replacement cost.

[0017] 2. The number of the meshing teeth on each tooth ring is 40-45 teeth, and the increase of the number of the meshing teeth can reduce the engagement angle of the meshing teeth, reduce the response time of the ratchet structure, and improve the riding efficiency. Preferably, the number of the meshing teeth on the tooth ring is 45 teeth, and the height of each tooth is not less than 0.85mm, which can guarantee the response time and avoid the problem of slipping caused by too many teeth. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation to the scope, and other related drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0019] Figure 1 is a structure schematic view of one of the embodiments of the present application;

[0020] Figure 2 is a sectional view of one of the embodiments of the present application;

[0021] Figure 3 and Figure 4 is a structure schematic view of the hub seat of one of the embodiments of the present application under different viewing angles;

[0022] Figure 5 is a sectional view of the hub seat of one of the embodiments of the present application;

[0023] Figure 6 and Figure 8 is a structure schematic view of the tower base of one of the embodiments of the present application under different viewing angles;

[0024] Figure 7 is Figure 6 is an enlarged view of A in figure 8;

[0025] Figure 9 is a sectional view of the tower base of one of the embodiments of the present application;

[0026] Figures 10 to 12 is a structure schematic view of the second gear ring of one of the embodiments of the present application under different viewing angles;

[0027] Figure 13 is a structure schematic view of the engagement of the two gear rings of one of the embodiments of the present application.

[0028] Icon:

[0029] 1 - shaft core; 11 - ring groove;

[0030] 2 - hub seat; 21 - first gear ring; 211 - first engagement tooth; 22 - first spring; 23 - first shaft sleeve; 24 - first threaded part;

[0031] 3 - tower base; 31 - second gear ring; 311 - second engagement tooth; 3111 - inclined surface; 3112 - transition surface; 312 - assembly cavity; 313 - spline; 32 - second spring; 33 - second shaft sleeve; 331 - insertion slot; 34 - second threaded part. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0033] Embodiment

[0034] In combination Figures 1 to 13 , the embodiment provides a ratchet structure of a bicycle hub, which comprises a shaft core 1, a hub seat 2 and a tower base 3 sleeved on the shaft core 1, the hub seat 2 is provided with a first gear ring 21 at one end facing the tower base 3, the tower base 3 is provided with a second gear ring 31 corresponding to the first gear ring 21, the end faces of the first gear ring 21 and the second gear ring 31 are respectively formed with a first meshing tooth 211 and a second meshing tooth 311, the number of the meshing teeth on each gear ring is 40-45 teeth, wherein the first gear ring 21 and the hub seat 2 and the second gear ring 31 and the tower base 3 are both provided with elastic members, so that the first meshing tooth 211 and the second meshing tooth 311 are unidirectionally meshed.

[0035] Exemplarily, the elastic member is a spring, the first gear ring 21 and the hub seat 2 are provided with a first spring 22, and the second gear ring 31 and the tower base 3 are provided with a second spring 32. When the tower base 3 is driven by the freewheel to rotate in the positive direction, the first meshing tooth 211 and the second meshing tooth 311 are meshed and transmitted, and when the tower base 3 is driven by the freewheel to rotate in the reverse direction, the second meshing tooth 311 and the first meshing tooth 211 are jumped under the action of the elastic member, so as to realize idling.

[0036] It should be noted that in the present embodiment, the ratchet structure is arranged as two toothed rings respectively arranged on the hub seat 2 and the tower base 3, and elastic members are arranged between the hub seat 2 and the first toothed ring 21 and between the tower base 3 and the second toothed ring 31, so that in the process of engaging transmission or skipping idling of the first engaging teeth 211 and the second engaging teeth 311, the elastic members on both sides can jointly bear the pressure generated in the rotating process, reduce one-way wear, thereby prolonging the service life of the hub. At the same time, the elastic members arranged at both ends can better balance the stress of the wheel in the rotating process, so that the stability of the hub is better. In addition, the two toothed rings are designed separately, which is conducive to the replacement and maintenance of the ratchet structure, and reduces the replacement cost.

[0037] In a preferred embodiment, the first toothed ring 21 and the second toothed ring 31 have the same structure, which is conducive to installation, prevents misinstallation, and also reduces mold opening cost. Further, the outer peripheral wall of the toothed ring is provided with a spline 313 extending in the axial direction, and the hub seat 2 and the tower base 3 are correspondingly provided with a spline groove matched with the spline 313, so as to realize circumferential transmission, that is, the tower base 3 drives the second toothed ring 31 to rotate, and the first toothed ring 21 drives the hub seat 2 to rotate. Preferably, one side of the toothed ring away from the engaging teeth is recessed to form an assembly cavity 312 for installing the elastic member, so as to make the structure more compact and save structural space. It should be noted that the other end of the hub seat 2 away from the first toothed ring 21 is provided with a first shaft sleeve 23 and a first threaded portion 24, and the end of the tower base 3 away from the second toothed ring 31 is provided with a second shaft sleeve 33 and a second threaded portion 34. The two shaft sleeves are provided with insertion grooves 331, and the outer periphery of the shaft core 1 is provided with a ring groove 11. During installation, the clip spring is inserted into the insertion groove 331 and clamped with the ring groove 11, so as to connect the shaft sleeve with the shaft core 1, and a threaded fastener is assembled on the two threaded portions to press the shaft sleeve, so that the hub seat 2 and the tower base 3 are limited in the axial direction of the shaft core 1. However, it is not limited to this and is not specifically limited.

[0038] In the above embodiment, in an optional embodiment of the present application, the number of engaging teeth on the toothed ring is 45, and the height of each tooth is not less than 0.85mm. Compared with the prior art, the design of 45 teeth can reduce the engagement angle of the engaging teeth, thereby reducing the response time of the ratchet structure, improving the riding efficiency, and avoiding the problem of slipping caused by too many teeth. Specifically, the engaging teeth are arranged in an array along the circumferential direction of the toothed ring, and have an inclined surface 3111 arranged in the circumferential direction, and the inclination angle of the inclined surface 3111 is 25°. Preferably, the cross-sectional shape of the engaging teeth is triangular, the tooth width is 1.78mm, and a transition surface 3112 with a width not less than 0.03mm is arranged at the tooth tip end of the engaging teeth. Thus, the tooth tip wear of the engaging teeth in the jumping process is avoided, and the smooth engagement of the engaging teeth is ensured.

[0039] The utility model discloses a bicycle wheel hub's ratchet wheel structure and a bicycle, and belongs to the technical field of bicycle wheel hub's ratchet wheel structure.

[0040] The preferred embodiments of the utility model are only above, the protection scope of the utility model is not only limited to the above -mentioned embodiment, and all technical schemes under the thought of the utility model of the utility model belong to the protection scope of the utility model.

Claims

1. A ratchet structure for a bicycle wheel hub, characterized in that, The device includes a shaft core, a hub seat, and a base sleeved on the shaft core. A first gear ring is disposed at one end of the hub seat facing the base, and a second gear ring is disposed on the base corresponding to the first gear ring. A first meshing tooth and a second meshing tooth are respectively formed on the end faces of the first gear ring and the second gear ring. The number of meshing teeth on each gear ring is 40 to 45. Elastic elements are disposed between the first gear ring and the hub seat, and between the second gear ring and the base, so that the first meshing tooth and the second meshing tooth engage in one direction.

2. The ratchet structure of the bicycle hub according to claim 1, characterized in that, The first gear ring and the second gear ring have the same structure.

3. The ratchet structure of the bicycle wheel hub according to claim 2, characterized in that, A spline is provided on the outer peripheral wall of the gear ring extending axially, and a spline groove adapted to the spline is provided on the hub seat and the base to realize circumferential transmission.

4. The ratchet structure of the bicycle wheel hub according to claim 2, characterized in that, The side of the gear ring away from the meshing teeth is recessed to form an assembly cavity for mounting the elastic element.

5. The ratchet structure of the bicycle wheel hub according to claim 2, characterized in that, The gear ring has 45 meshing teeth, and the height of each tooth is not less than 0.85 mm.

6. The ratchet structure of the bicycle wheel hub according to claim 5, characterized in that, The width of the meshing teeth is 1.78 mm.

7. The ratchet structure of the bicycle wheel hub according to claim 5, characterized in that, Each meshing tooth is arranged in an array along the circumference of the gear ring and has an inclined surface that is inclined along the circumference, the inclination angle of which is 25°.

8. The ratchet structure of the bicycle hub according to claim 7, characterized in that, The cross-sectional shape of the meshing teeth is triangular.

9. The ratchet structure of the bicycle wheel hub according to claim 8, characterized in that, The tips of the meshing teeth are provided with a transition surface with a width of not less than 0.03 mm.

10. A bicycle, characterized in that, The vehicle includes a vehicle body and a ratchet structure for a bicycle wheel hub as described in any one of claims 1-9, which is adapted to and connected to the vehicle body.

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