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Patent Information
- Application Number
- DE202025101807
- Authority / Receiving Office
- DE · DE
- Patent Type
- Utility models
- Current Assignee / Owner
- Filing Date
- 2025-04-02
- Publication Date
- 2025-09-25
- Estimated Expiration
- 2035-04-30
Smart Images
Figure 00000000_0000_ABST
Abstract
Description
Technical area
[0001] The invention relates to a bicycle component, in particular a hub. State of the art
[0002] Due to environmental protection, energy savings, CO2 reduction, and health concerns, many people are replacing their mode of transport from motorcycles or cars to bicycles. In addition to its environmental benefits, cycling can also strengthen the body and reduce stress. Therefore, cycling is very popular among modern people.
[0003] When the bike is to move forward, the rider drives the large sprocket to rotate by pedaling. The large sprocket then drives the flywheel via the chain, which drives the hub structure to rotate the rim. The hub generally consists of a hub body, an axle, and a pawl seat. The pawl seat is arranged on the flywheel and connected to the hub body to transmit the power to the hub body. The hub body is connected to the rim via several spokes to carry it along. The axle connects the entire hub structure in series. The axle, as a core component, forms the axis of rotation around which the rim is rotated. Therefore, the hub is an extremely important component of a bicycle.
[0004] However, the hub body, the pawl seat, and the pawls arranged between the hub body and the pawl seat of a conventional hub often have problems such as unstable assembly, low structural strength, uneven rotation, and poor drive power transmission efficiency. Therefore, it is necessary to provide a novel and advanced hub to solve the above-mentioned problems. Object of the invention
[0005] The object of the invention is to provide a hub that can be driven more stably, precisely and reliably.
[0006] This object is achieved by the hub of the invention, which comprises: a hub shell having an axle hole, a plurality of teeth surrounding the axle hole and extending axially, and at least one flange surrounding the axle hole, extending radially, and serving to connect to a plurality of spokes; a pawl seat having a drive end axially inserted into the hub shell, the outer peripheral surface of the drive end being provided with two grooves and a plurality of axially extending recesses; a plurality of pawls received in the plurality of recesses and engaging with the teeth to allow only one direction of rotation, the pawls being able to pivot between an outer pivot position and an inner pivot position; two elastic members circumferentially arranged around the plurality of pawls, whereby the plurality of pawls engage with the teeth in the normal state;and an axis passing through the hub shell and the pawl seat; wherein, when the plurality of pawls are in the outer pivot position, the elastic restraining force of the elastic members is between 0.0561 kgf and 0.0828 kgf, and when the plurality of pawls are in the inner pivot position, the elastic restraining force of the elastic members is between 0.09945 kgf and 0.13685 kgf.; Short description of the drawings Fig. 1 a perspective view of the embodiment of the invention, Fig. 2 an exploded view of the embodiment of the invention, Fig. 3 an enlarged view according to Fig. 2, Fig. 4 is a sectional view before inserting the drive end into the hub shell of the pawl seat of the embodiment of the invention, Fig. 5 and Fig. 6 representations of the movement of the embodiment of the invention, Fig. 7 an enlarged view according to Fig. 4. Ways to implement the invention
[0007] The following examples are merely illustrative of possible implementations of the present invention and are not intended to limit the scope of the present invention.
[0008] Fig. Figures 1 to 7 show an embodiment of the invention. The hub 1 of the invention comprises a hub shell 10, a pawl seat 20, a plurality of pawls 30, two elastic elements 40, and an axle 50.
[0009] The hub shell 10 has an axle hole 11, a plurality of teeth 12 surrounding the axle hole 11 and extending axially, and at least one flange 13 surrounding the axle hole 11, extending radially, and serving to connect to a plurality of spokes. The pawl seat 20 has a drive end 21 axially inserted into the hub shell 10. The outer peripheral surface 211 of the drive end 21 is provided with two grooves 22 and a plurality of axially extending recesses 23. The plurality of pawls 30 are received in the plurality of recesses 23 and can engage with the teeth 12 to realize rotation in only one direction. The pawls 30 can be pivoted between an outer pivot position ( Fig. 5) and an inner pivot position ( Fig. 6). The two elastic members 40 are arranged circumferentially around the plurality of pawls 30, whereby the plurality of pawls 30 are normally engaged with the teeth 12, so that the pawl seat 20 can drive the hub shell 10 through the plurality of pawls 30, and the hub shell 10 can only be rotated in one direction relative to the pawl seat 20. The axis 50 extends through the hub shell 10 and the pawl seat 20.
[0010] When the plurality of pawls 30 are in the outer pivot position (in Fig. 5, the plurality of pawls 30 engage with the plurality of teeth 12), the elastic retention force of the elastic elements 40 is between 0.0561 kgf and 0.0828 kgf. When the plurality of pawls 30 are in the inner pivot position (in Fig. 6 (the plurality of pawls 30 slide over the plurality of teeth 12), the elastic restraining force of the elastic members 40 is between 0.09945 kgf and 0.13685 kgf. When the plurality of pawls 30 are in the outer pivoting position, the elastic restraining force of the elastic members 40 is preferably between 0.066 kgf and 0.072 kgf, and when the plurality of pawls 30 are in the inner pivoting position, the elastic restraining force of the elastic members 40 is preferably between 0.117 kgf and 0.119 kgf. This allows the plurality of pawls 30 to be exerted with sufficient restraining force to stably pivot, so that they can reliably engage the plurality of teeth 12 to drive the hub shell 10 more effectively.
[0011] Specifically, the two elastic elements 40 are C-shaped rings. The linear density of the elastic elements 40 is between 0.306 kg / mm and 0.04485 kg / mm. The linear density of the elastic elements 40 is preferably between 0.036 kg / mm and 0.039 kg / mm, which can provide uniform force application, adequate elasticity, and a stable structure.
[0012] Furthermore, each of the pawls 30 is provided with two grooves 31. The two elastic members 40 are received in the grooves 31. The two grooves 31 each have a bottom surface 32. When the plurality of pawls 30 are in the outer or inner pivot position, the bottom surfaces 32 of the grooves 31 are lower than the outer peripheral surface 211 of the drive end 21 relative to the bottom surfaces of the recesses 23. In this way, the two elastic members 40 do not protrude from the outer peripheral surface 211 of the drive end 21, so that the plurality of pawls 30 and the plurality of teeth 12 can mesh and disengage smoothly. In this embodiment, the bottom surfaces 32 of the two grooves 31 are flat surfaces.When the plurality of pawls 30 are in the outer pivot position, the two elastic members 40 each press against one end of the flat surfaces, and a gap G exists between the two elastic members 40 and the flat surfaces, so that the elastic force of the two elastic members 40 can retain the plurality of pawls 30 more effectively and accurately. When the drive end 21 is not yet inserted into the hub shell 10, the bottom surfaces 32 of the two grooves 31 are perpendicular to the radial direction R of the axis 50 (Fig. Fig. 4). Preferably, the angle θ between the bottom surface 32 and the end face of each groove 31 is between 25 and 35 degrees so that the pivoting of the plurality of pawls 30 can be more precise and smooth.
[0013] In this embodiment, a projection 24 is provided in each of the two grooves 22. The projections 24 in the two grooves 22 are arranged at an angle of 90 degrees (or other angles). The two ends of each elastic member 40 are restricted on the opposite sides of the projection 24 to prevent the two elastic members 40 from arbitrarily rotating or displacing. In particular, the bottom surfaces of the two grooves 22 are each provided with an insertion hole 221, and the projection 24 is inserted into the insertion hole 221, which enables quick and convenient assembly and disassembly. Preferably, the radial dimensions of the projection 24 and the insertion hole 221 are larger than the width of the two grooves 22, thereby achieving good structural strength and preventing the projections 24 from being deformed and tilted by external forces. The projections 24 may also be integrally formed on the drive end.
[0014] The invention relates to a hub comprising: a hub shell (10) having an axle hole (11), a plurality of teeth (12) surrounding the axle hole (11) and extending axially, and at least one flange (13) surrounding the axle hole (11), extending radially, and serving to connect to a plurality of spokes; a pawl seat (20) having a drive end (21) axially inserted into the hub shell (10), wherein the outer peripheral surface (211) of the drive end (21) is provided with two grooves (22) and a plurality of axially extending recesses (23); a plurality of pawls (30) received in the plurality of recesses (23) and engaging with the teeth (12) to allow only one direction of rotation, wherein the pawls (30) can pivot between an outer pivot position and an inner pivot position;two elastic members (40) arranged circumferentially around the plurality of pawls (30), whereby the plurality of pawls (30) are normally engaged with the teeth (12); and an axis (50) passing through the hub shell (10) and the pawl seat (20); wherein, when the plurality of pawls (30) are in the outer pivot position, the elastic restraining force of the elastic members (40) is between 0.0561 kgf and 0.0828 kgf, and when the plurality of pawls (30) are in the inner pivot position, the elastic restraining force of the elastic members (40) is between 0.09945 kgf and 0.13685 kgf. List of reference symbols 1 hub 10 hub shells 11 axle hole 12 tooth 13 Flange 20 pawl seat 21 Drive end 211 Outer peripheral surface 22 grooves 221 insertion hole 23 Recess 24 lead 30 pawl 31 groove 32 floor area 40 elastic element 50 axle G gap R radial direction θ angle
Claims
[1] Hub, with a hub shell (10) having an axle hole (11), a plurality of teeth (12) surrounding the axle hole (11) and extending axially, and at least one flange (13) surrounding the axle hole (11), extending radially, and serving to connect to a plurality of spokes; a pawl seat (20) having a drive end (21) axially inserted into the hub shell (10), the outer peripheral surface (211) of the drive end (21) being provided with two grooves (22) and a plurality of axially extending recesses (23); a plurality of pawls (30) received in the plurality of recesses (23) and engaging the teeth (12) to realize rotation in only one direction, wherein the pawls (30) can pivot between an outer pivot position and an inner pivot position; two elastic elements (40) arranged circumferentially around the plurality of pawls (30), whereby the plurality of pawls (30) are in engagement with the teeth (12) in the normal state; and an axis (50) passing through the hub shell (10) and the pawl seat (20); wherein, when the plurality of pawls (30) are in the outer pivoting position, the elastic retaining force of the elastic elements (40) is between 0.0561 kgf and 0.0828 kgf, and when the plurality of pawls (30) are in the inner pivoting position, the elastic retaining force of the elastic elements (40) is between 0.09945 kgf and 0.13685 kgf. [2] Hub according to claim 1, characterized bythat when the plurality of pawls (30) are in the outer pivoting position, the elastic retaining force of the elastic elements (40) is between 0.066 kgf and 0.072 kgf, and when the plurality of pawls (30) are in the inner pivoting position, the elastic retaining force of the elastic elements (40) is between 0.117 kgf and 0.119 kgf. [3] Hub according to claim 1, characterized by that the two elastic elements (40) are C-shaped rings, the linear density of the elastic elements (40) being between 0.306 kg / mm and 0.04485 kg / mm. [4] Hub according to claim 3, characterized by that the linear density of the elastic elements (40) is between 0.036 kg / mm and 0.039 kg / mm. [5] Hub according to claim 1, characterized bythat each pawl (30) is provided with two grooves (31) each having a bottom surface (32), wherein, when the plurality of pawls (30) are in the outer or inner pivot position, the bottom surfaces (32) of the grooves (31) are lower relative to the bottom surfaces of the recesses (23) than the outer peripheral surface (211) of the drive end (21). [6] Hub according to claim 5, characterized by that the bottom surfaces (32) of the two grooves (31) are flat surfaces, wherein, when the plurality of pawls (30) are in the outer pivoting position, the two elastic elements (40) each press against one end of the flat surfaces and there is a gap (G) between the two elastic elements (40) and the flat surfaces. [7] Hub according to claim 5, characterized bythat, when the drive end (21) is not yet inserted into the hub shell (10), the bottom surfaces (32) of the two grooves (31) are perpendicular to the radial direction (R) of the axis (50). [8] Hub according to claim 1, characterized by that each pawl (30) is provided with two grooves (31), wherein the two elastic elements (40) are C-shaped rings and are received in the grooves (31), wherein a projection (24) is provided in each of the two grooves (22), and wherein the two ends of each elastic element (40) are restricted on the opposite sides of the projection (24). [9] Hub according to claim 8, characterized by that the bottom surfaces of the two grooves (22) are each provided with an insertion hole (221) into which the projection (24) is inserted. [10] Hub according to claim 6, characterized bythat when the plurality of pawls (30) are in the outer pivoting position, the elastic retention force of the elastic elements (40) is between 0.066 kgf and 0.072 kgf, and when the plurality of pawls (30) are in the inner pivoting position, the elastic retention force of the elastic elements (40) is between 0.117 kgf and 0.119 kgf; that the two elastic elements (40) are C-shaped rings, the linear density of the elastic elements (40) being between 0.306 kg / mm and 0.04485 kg / mm; that when the drive end (21) is not yet inserted into the hub shell (10), the bottom surfaces (32) of the two grooves (31) are perpendicular to the radial direction (R) of the axis (50); that a projection (24) is provided in each of the two grooves (22), the two ends of each elastic element (40) being restricted on the opposite sides of the projection (24);that the bottom surfaces of the two grooves (22) are each provided with an insertion hole (221) into which the projection (24) is inserted; that the radial dimensions of the projection (24) and the insertion hole (221) are greater than the width of the two grooves (22); and that the angle (θ) between the bottom surface (32) and the end face of each groove (31) is between 25 and 35 degrees.;