Bicycle hub structure
By using wave-crest adjustment and multi-spring uniform force distribution design, the problems of difficult preload adjustment of bicycle hubs and heavy and uneven force distribution of clutch structure are solved, thus improving service life and riding performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-09
- Publication Date
- 2026-03-20
AI Technical Summary
Existing bicycle hubs have difficulty adjusting preload, and the clutch structure is heavy and unevenly stressed, affecting service life and riding performance.
The axial clearance is adjusted by using a wave-shaped pad, multiple small springs are evenly stressed, the toothed ring design is eliminated, and a tapered tooth surface is used to enhance meshing stability, reducing the number of parts to reduce weight.
It allows ordinary consumers to adjust the locking force themselves, ensuring even force distribution, reducing wear, improving service life and riding performance, and reducing overall weight.
Smart Images
Figure CN224013315U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of bicycle hub, concretely relates to a bicycle hub structure. BACKGROUND
[0002] At present, in order to realize the function that the bicycle is driven forward when pedaling and continues to slide when stopping pedaling, the modern bicycle generally adopts the hub with one-way clutch function to drive the rotation of the bicycle wheel.
[0003] In the prior art, the pre-pressing locking scheme of the bicycle hub generally sets screw holes on the side cover, and is realized by locking screw after artificial adjustment. The technical level of the operator is extremely high in this way, and once the adjustment is improper, the shaft center is easily deformed, affecting the normal use of the hub. In the aspect of clutch structure, the existing scheme mostly adopts the form of combination of gear ring, double gear and tower base, which not only increases the overall weight of the hub, but also makes the gear unevenly stressed by using a single large spring, and the gear is unevenly stressed when engaging, thereby reducing the service life of the hub. SUMMARY
[0004] The utility model aims at providing a bicycle hub structure to solve the problems of pre-pressing adjustment difficulty, heavy clutch structure and uneven stress.
[0005] To achieve the above object, the utility model provides the following technical scheme: a bicycle hub structure, including hub shell, tower base shell, middle shaft, movable gear ring and multiple springs, the hub shell and tower base shell are rotationally arranged on the middle shaft, the side of the hub shell close to the tower base shell is provided with a key groove, the movable gear ring is slidably connected in the key groove and fixedly connected with the hub shell in the circumferential direction, the side of the tower base shell close to the hub shell is integrally formed with a plurality of first ratchets, the side of the movable gear ring close to the tower base shell is provided with a plurality of second ratchets meshing with the first ratchets, a plurality of installation grooves for placing the springs are formed in the hub shell, the left and right limit end covers are connected with the middle shaft between the hub shell and the tower base shell, and a wave crest pad is arranged between the right limit end cover and the tower base shell.
[0006] In further embodiments, the tooth surfaces of the first ratchets on the tower base shell and the second ratchets on the movable gear ring are both tapered tooth surfaces, and the cooperation of the two enables the movable gear ring to drive the one-way rotation of the tower base shell.
[0007] In further embodiments, a plurality of limit grooves corresponding to the springs are uniformly arranged on the side of the movable gear ring away from the tower base shell, and the two ends of the spring are respectively in contact with the groove bottom of the limit groove and the groove bottom of the installation groove, for driving the movable gear ring and the tower base shell to always keep meshing.
[0008] In further embodiments, the outer peripheral wall of the movable ring gear is provided with external splines, the inner wall of the keyway is provided with internal splines matched with the external splines, and the movable ring gear is slidably installed in the keyway through the matching of the external splines and the internal splines.
[0009] In further embodiments, the hub shell is rotatably arranged on the middle shaft through two first bearings, and the tower base shell is rotatably arranged on the middle shaft through two second bearings.
[0010] In further embodiments, the opposite end faces of the first ratchet teeth on the tower base shell and the second ratchet teeth on the movable ring gear are flatly arranged and perpendicularly arranged relative to the axis.
[0011] The technical effects and advantages of the utility model are as follows:
[0012] The bicycle hub structure adjusts the axial gap of the hub shell and the tower base shell on the middle shaft through the elastic deformation of the wave crest pad, does not need to use professional tools for complex screw adjustment, and ordinary consumers can self-adjust the locking force of the side cover according to the use requirement, greatly reduces the requirement for professional technical level, and avoids the problem of axis deformation caused by improper manual screw adjustment;
[0013] The multiple small springs replace the single large spring, the uniformly distributed small springs can make the movable ring gear be more uniformly stressed when moving in the axial direction, effectively reduce the abrasion and resistance between the movable ring gear and the tower base shell, and improve the service life of the clutch mechanism, in addition, the design of the conical tooth surface makes the first ratchet teeth and the second ratchet teeth have a self-adaptive effect when engaging, further enhances the stability of meshing, and reduces the damage of the gear caused by uneven stress;
[0014] The traditional ring gear design is cancelled, the first ratchet teeth are integrally formed on the tower base shell, the number of parts is reduced, the overall weight of the hub is effectively reduced, and the riding performance of the bicycle is improved, the bicycle hub structure adjusts through the wave crest pad, the multiple springs are uniformly stressed, and the lightweight design is realized, the bearing play is simply adjusted, the clutch mechanism is stably meshed, the overall weight is optimized, and the service life and use convenience of the hub are remarkably improved. BRIEF DESCRIPTION OF DRAWINGS
[0015] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can obtain other drawings according to these drawings without creating creative labor.
[0016] Figure 1 It is a structural schematic diagram of the utility model.
[0017] Figure 2 The front view of the utility model;
[0018] Figure 3 The sectional view of the utility model;
[0019] Figure 4 The front view of the utility model; Figure 3 The enlarged view of A in the middle.
[0020] In the figure: 1, flower drum shell; 2, tower base shell; 3, middle shaft; 4, first bearing; 5, second bearing; 6, movable gear ring; 7, spring; 8, left limit end cover; 9, right limit end cover; 10, wave crest pad. DETAILED DESCRIPTION
[0021] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one skilled in the art that the present application can be practiced without one or more of these specific details. In other instances, well-known features have not been described in detail to avoid obscuring the present application.
[0022] Unless the context clearly requires otherwise, throughout the description, the terms "comprise", "comprising", "include", "including", and the like are to be construed in an inclusive sense, as opposed to an exclusive or exhaustive sense; that is to say, in the sense of "including, but not limited to".
[0023] The utility model provides a kind of bicycle flower drum structure as Figures 1-4 As shown in the figure, the utility model discloses a bicycle flower drum structure, including flower drum shell 1, tower base shell 2, middle shaft 3, movable gear ring 6 and multiple springs 7, flower drum shell 1 is rotationally arranged on middle shaft 3 by two first bearings 4, tower base shell 2 is rotationally arranged on middle shaft 3 by two second bearings 5, the side of flower drum shell 1 close to tower base shell 2 is provided with keyway, the outer circumferential wall of movable gear ring 6 is equipped with external spline, the inner wall of keyway is equipped with the internal spline matched with external spline, movable gear ring 6 is slidably connected in keyway by the cooperation of external spline and internal spline, and is fixedly connected with flower drum shell 1 circumferentially;
[0024] The first ratchet teeth are integrally formed on one side of the tower base shell 2 close to the hub shell 1, the second ratchet teeth are arranged on one side of the movable gear ring 6 close to the tower base shell 2, the tooth surfaces of the first ratchet teeth and the second ratchet teeth are tapered tooth surfaces, the opposite end faces of the first ratchet teeth and the second ratchet teeth are flat and perpendicular to the axis, and the included angle between the tooth surface and the axis is set according to actual use requirements, so that the movable gear ring 6 can drive the tower base shell 2 to rotate in one direction; when the tower base shell 2 rotates in the positive direction, the first ratchet teeth mesh with the second ratchet teeth, so that the movable gear ring 6 and the hub shell 1 rotate; when the tower base shell 2 reverses, the first ratchet teeth slide out of the second ratchet teeth, and the tower base shell 2 idles;
[0025] A plurality of limiting grooves corresponding to the springs 7 are uniformly arranged on the side of the movable gear ring 6 away from the tower base shell 2, the two ends of the spring 7 are in contact with the groove bottoms of the limiting grooves and the mounting grooves respectively, and the movable gear ring 6 and the tower base shell 2 are always kept in meshing, so that even if one of the springs 7 fails, the other springs 7 can still provide sufficient elastic force to ensure that the movable gear ring 6 smoothly slides in the key groove;
[0026] The hub shell 1 and the tower base shell 2 are respectively provided with a left limiting end cover 8 and a right limiting end cover 9, the left limiting end cover 8 and the right limiting end cover 9 are detachably connected to the two ends of the middle shaft 3 through threads, the wave crest pad 10 is arranged between the right limiting end cover 9 and the tower base shell 2, the wave crest pad 10 is elastic, the compression amount thereof can be adjusted according to requirements, so that the axial gap of the hub shell 1 and the tower base shell 2 on the middle shaft 3 is adjusted, and pre-pressing adjustment is realized.
[0027] The standard parts used in the utility model can be purchased from the market, the special-shaped parts can be ordered according to the description and the drawings, the specific connection mode of each part adopts the conventional means such as bolts, rivets and welding in the prior art, the machinery, parts and equipment adopt conventional models in the prior art, the circuit connection adopts the conventional connection mode in the prior art, and details are not described herein, the control mode of the utility model is controlled by a controller, the control circuit of the controller can be realized by simple programming of the person skilled in the art, and the contents not described in detail in the description belong to the prior art known by the person skilled in the art.
[0028] In the description of the utility model, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.
[0029] Working principle:
[0030] The bicycle hub structure, when pedaling, the tower base shell 2 rotates forward, the first ratchet and the second ratchet are engaged, the movable gear ring 6 and the hub shell 1 are driven to rotate, thereby driving the bicycle wheel to run; when stopping pedaling or reversing pedaling, the tower base shell 2 reverses, the ratchets are separated, the tower base shell 2 idles, the bicycle wheel continues to rotate by inertia, the bearing play can be conveniently adjusted through the wave crest pad 10, and the plurality of springs 7 ensure that the movable gear ring 6 is stably engaged, and the conical tooth surface enhances the self-adaptive ability and stability of engagement.
[0031] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.
Claims
1. A bicycle hub structure, comprising a hub housing (1), a freehub housing (2), a bottom bracket (3), a movable gear ring (6), and multiple springs (7), characterized in that: Both the hub shell (1) and the freehub shell (2) are rotatably mounted on the central shaft (3). The hub shell (1) has a keyway on the side near the freehub shell (2). The movable gear ring (6) is slidably connected in the keyway and is circumferentially fixed to the hub shell (1). The freehub shell (2) has several first ratchet teeth integrally formed on the side near the hub shell (1). The movable gear ring (6) has several second ratchet teeth that mesh with the first ratchet teeth on the side near the freehub shell (2). The hub shell (1) has multiple mounting slots for placing springs (7). The hub shell (1) and the freehub shell (2) are connected to the central shaft (3) at both ends through a left limiting end cap (8) and a right limiting end cap (9). A corrugated pad (10) is provided between the right limiting end cap (9) and the freehub shell (2).
2. The bicycle hub structure according to claim 1, characterized in that: The first ratchet on the tower base shell (2) and the second ratchet on the movable gear ring (6) both have conical tooth surfaces. The two work together to enable the movable gear ring (6) to drive the tower base shell (2) to rotate in one direction.
3. The bicycle hub structure according to claim 1, characterized in that: The movable toothed ring (6) is provided with a plurality of limiting grooves that correspond one-to-one with the springs (7) on the side away from the tower base shell (2). The two ends of the springs (7) are in contact with the bottom of the limiting groove and the bottom of the mounting groove, respectively, to drive the movable toothed ring (6) to always maintain engagement with the tower base shell (2).
4. The bicycle hub structure according to claim 1, characterized in that: The movable gear ring (6) has an external spline on its outer peripheral wall and an internal spline on the inner wall of the keyway that mates with the external spline. The movable gear ring (6) is slidably installed in the keyway through the mating of the external spline and the internal spline.
5. A bicycle hub structure according to claim 1, characterized in that: The hub shell (1) is rotatably mounted on the central shaft (3) via two first bearings (4), and the tower base shell (2) is rotatably mounted on the central shaft (3) via two second bearings (5).
6. A bicycle hub structure according to claim 2, characterized in that: The first ratchet on the tower base shell (2) and the second ratchet on the movable gear ring (6) are arranged with their opposite end faces flat and perpendicular to the axis.