CN212685105U - Bicycle hub clutch structure - Google Patents
Bicycle hub clutch structure Download PDFInfo
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- CN212685105U CN212685105U CN202020404776.0U CN202020404776U CN212685105U CN 212685105 U CN212685105 U CN 212685105U CN 202020404776 U CN202020404776 U CN 202020404776U CN 212685105 U CN212685105 U CN 212685105U
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- 239000000428 dust Substances 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims 8
- 230000005540 biological transmission Effects 0.000 abstract description 13
- 238000000926 separation method Methods 0.000 description 21
- 230000004308 accommodation Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 210000000078 claw Anatomy 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
本实用新型公开了一种自行车花鼓离合结构，包括：花鼓壳体与棘轮座，各借第一、第二轴承与第三、第四轴承可转动地套设在心轴上，花鼓壳体设有容置空间其内部具有挡壁及内螺纹；棘轮座设有凸环可伸入容置空间内，凸环设数个第一嵌齿；一从动齿盘具有第一内径套在棘轮座的凸环外周，从动齿盘的外周设外螺纹与花鼓壳体的内螺纹螺合，从动齿盘设有接合面，接合面分布数个第一棘齿；一离合齿盘具有第二内径，第二内径分布数个第二嵌齿与棘轮座的第一嵌齿啮合，离合齿盘具有一环面，环面分布有数个第二棘齿与从动齿盘的第一棘齿啮合；一偏压构件套在棘轮座的凸环外周并位在离合齿盘与容置空间的挡壁间，借此达到传动反应快速及组装方便目的。
The utility model discloses a bicycle hub clutch structure, comprising: a hub shell and a ratchet seat, each of which is rotatably sleeved on a spindle by means of first and second bearings and third and fourth bearings, the hub shell is provided with an accommodating space, the interior of which is provided with a retaining wall and an internal thread; the ratchet seat is provided with a convex ring which can extend into the accommodating space, the convex ring is provided with a plurality of first cog teeth; a driven toothed disc has a first inner diameter and is sleeved on the outer periphery of the convex ring of the ratchet seat, the outer periphery of the driven toothed disc is provided with an external thread which is screwed with the internal thread of the hub shell, the driven toothed disc is provided with a joint surface, the joint surface is provided with a plurality of first ratchet teeth; a clutch toothed disc has a second inner diameter, a plurality of second cog teeth are distributed on the second inner diameter and mesh with the first cog teeth of the ratchet seat, the clutch toothed disc has an annular surface, a plurality of second ratchet teeth are distributed on the annular surface and mesh with the first ratchet teeth of the driven toothed disc; a biasing member is sleeved on the outer periphery of the convex ring of the ratchet seat and is located between the clutch toothed disc and the retaining wall of the accommodating space, thereby achieving the purpose of fast transmission response and convenient assembly.
Description
Technical Field
The utility model relates to a bicycle especially relates to bicycle flower-drum separation and reunion structure.
Background
Please refer to the ratchet structure of the known taiwan No. M534113 bicycle hub, which comprises: a hub, a sleeve arranged at one side of the hub and a ratchet group. The central axis of the hub is provided with a hub, one side of the hub is concavely provided with a containing groove, the inner edge part of the containing groove is annularly provided with an internal thread section, and the hub is positioned at the innermost side of the containing groove and the other side of the hub is sleeved with a bearing. The two sides of the sleeve are respectively provided with at least one bearing, one side of the outer part of the sleeve is provided with a first-order edge part with a convex outer diameter, one side of the edge part, which is far away from the sleeve, is integrally provided with a pawl seat, the outer diameter of the edge part is provided with a plurality of pawl grooves, the pawl grooves are annularly arranged among the pawl grooves and are arranged on the outer diameter of the pawl seat, one end of the inner part of each pawl groove is provided with an accommodating part, and one side of the sleeve, which is far away from the hub, is provided with a connecting part for mutually locking and combining with the bicycle center.
The ratchet group consists of a plurality of pawls, a plurality of elastic parts and a ratchet ring, wherein each pawl is respectively accommodated in each pawl groove of the pawl seat, the pawls are provided with arc-shaped group-arranging ends, a plurality of outward pawls extend towards the other end, the pawls can rotate relative to the pawl grooves, the first ends of the elastic parts are accommodated in the accommodating parts of the sleeves, and the second ends of the elastic parts are abutted against the back parts of the pawls to provide restoring force for the pawls. The ratchet ring is locked with the internal thread section annularly arranged on the inner side edge of the containing groove of the hub through the external thread section, a plurality of ratchets are arranged on the inner periphery of the ratchet ring, and the hub sleeve is arranged on one side of the hub and is mutually penetrated with the hub. By means of the rotation of the sleeve, the pawls of the pawls are meshed with the ratchets of the ratchet ring to drive the ratchet ring and the hub to rotate. On the contrary, when the sleeve rotates reversely, the pawls are pressed by the ratchet ring to press the elastic element, and the pawls of the pawls are disengaged from the ratchets of the ratchet ring, so that the hub cannot be driven to rotate in one direction. It is characterized in that the R angles of the claw tips of a plurality of claws of the pawl are sequentially enlarged.
Therefore, each pawl is propped against the back of the pawl by the elastic piece, a plurality of claws of the pawl are clamped against the ratchets in the ratchet ring, and the sleeve drives the hub. On the contrary, when the pawls and the ratchet ring relatively rotate reversely, the pawls are meshed with the ratchets of the ratchet ring in a relative number to form a meshing length with a section of stroke, the R angles of the pawl tips of the pawls are sequentially enlarged, and the pawl tips of the pawls are meshed with the ratchets of the ratchet ring in a relative number to form a meshing gap with a gap from small to large from complete sealing, so that the pawls can be separated from the ratchets of the ratchet ring more quickly and smoothly, the elastic piece is pressed, the hub and the pawls are in an idle running state, and the one-way transmission between the sleeve and the hub is realized.
The sleeve drives the hub to rotate, only the ratchets of the pawls are meshed with partial ratchets of the ratchet ring to drive the hub to rotate forwards, the driving force is quite limited, the reaction speed of the hub driven to rotate is low, particularly, the pawls are meshed with the ratchets of the ratchet ring and respectively abut against the back of the pawls through an elastic piece, a plurality of pawls outside the pawls can be meshed with a relative number of ratchets of the ratchet ring, the number of integral parts is large, and time and labor are wasted during assembly.
SUMMERY OF THE UTILITY MODEL
The utility model provides a bicycle flower-drum separation and reunion structure, the separation and reunion fluted disc of its ratchet seat can receive the spring action and the driven fluted disc meshing of a bias voltage component, and then make driven fluted disc drive flower-drum casing rotatory, make the bicycle move ahead to the rotation of flower-drum is driven to minimum subassembly, and the number of teeth that separation and reunion fluted disc and driven fluted disc meshed is many, and the interlock area is big, can reach the quick and convenient purpose of equipment of transmission reaction.
The utility model discloses a further purpose, for borrowing from the driven fluted disc has conical composition surface, and the separation and reunion fluted disc has conical anchor ring, the elasticity promotion that is by the bias voltage component when the separation and reunion fluted disc leans on to the driven fluted disc, when making the second ratchet on the separation and reunion fluted disc anchor ring and the first ratchet on the composition surface of driven fluted disc eat mutually, the conical anchor ring of separation and reunion fluted disc has the guide effect, can just accurately let the second ratchet of separation and reunion fluted disc mesh mutually with the first ratchet of driven fluted disc fast, reach the accurate and quick transmission purpose of degree of contact.
To achieve the above object, the present invention discloses a bicycle hub clutch structure, including: a spindle, a hub housing, a ratchet seat, a driven gear, a clutch gear and a biasing member. The hub shell is rotatably sleeved on the mandrel and provided with an accommodating space, an internal thread and a retaining wall are arranged in the accommodating space, and the inner diameter of the retaining wall is smaller than that of the accommodating space; the ratchet seat is rotatably sleeved on the mandrel, a convex ring is arranged on the ratchet seat towards the direction of the hub shell, and a plurality of first embedded teeth are radially arranged on the periphery of the convex ring; the driven fluted disc is provided with a first inner diameter which is sleeved on the periphery of the convex ring of the ratchet seat, the periphery of the driven fluted disc is provided with an external thread, the external thread is screwed with the internal thread of the hub shell, the driven fluted disc is provided with a joint surface facing the direction of the hub shell, and the joint surface is annularly distributed with a plurality of first ratchets; the clutch fluted disc is provided with a second inner diameter, a plurality of second embedded teeth are annularly distributed on the second inner diameter, the second embedded teeth are meshed with the first embedded teeth of the ratchet wheel seat, the clutch fluted disc is provided with a ring surface facing the ratchet wheel seat, a plurality of second ratchets are annularly distributed on the ring surface, and the second ratchets are meshed with the first ratchets of the driven fluted disc; the biasing member is disposed between the clutch gear and the retaining wall of the hub shell to urge the clutch gear and the driven gear into engagement.
Wherein, the joint surface of the driven fluted disc and the ring surface of the clutch fluted disc are conical.
The holding space of the hub shell is provided with a baffle ring, the baffle ring is provided with a radial surface and a ring wall, the radial surface is attached to the baffle wall, the ring wall of the baffle ring is matched with the peripheral wall of the holding space, the biasing member is wound into a plurality of circles by spiral circles and is conical, one end of the biasing member, which is in contact with the radial surface of the baffle ring, is a large circular diameter, and one end of the biasing member, which is in contact with the clutch fluted disc, is a small circular diameter.
Wherein, the periphery of this ratchet seat is equipped with a backstop ring, and the external diameter of this backstop ring is greater than the external diameter of this bulge loop, and the periphery of this backstop ring is equipped with an annular dirt proof boot, and the opening of the accommodation space of this flower-drum casing is sealed to this dirt proof boot.
Wherein, a tool joint configuration is arranged on one side of the driven fluted disc facing the ratchet wheel seat, so that a tool can be jointed to tightly press the driven fluted disc on the hub shell.
The hub shell is rotatably sleeved on the mandrel through a first bearing and a second bearing, and the ratchet seat is rotatably sleeved on the mandrel through a third bearing and a fourth bearing.
Wherein, a hollow sleeve is arranged between the third bearing and the fourth bearing, and the sleeve is sleeved on the mandrel.
Wherein, the number of teeth of the first ratchet and/or the second ratchet is 72 teeth, 90 teeth or 120 teeth.
Wherein the first cog and the second cog are arranged in parallel with the mandrel.
Wherein, the first end of the mandrel is provided with a first seal cover in a screw way, and the second end of the mandrel is provided with a second seal cover in a screw way.
Therefore, the utility model discloses have following advantage at least:
1. the utility model discloses the ratchet seat is rotatory with the drive flower-drum casing, the component subassembly that makes the wheel walk forward is few, simple structure makes the equipment convenient, outside great reduce cost, the ratchet seat drives the component subassembly that the flower-drum casing produced the rotation and keeps off the ring, the bias voltage component, separation and reunion fluted disc and driven fluted disc, all dispose in the accommodation space of flower-drum casing, seal by the dirt proof boot of ratchet seat again, can prevent that the dust of outside from getting into, ensure the accurate meshing transmission of separation and reunion fluted disc and driven fluted disc in the accommodation space, it is more certain to make the foot step on pedal drive bicycle and walk forward, and reduce the fault rate widely.
2. The utility model discloses driven fluted disc is conical composition surface towards the direction of flower-drum casing, can expand the arrangement in the number of teeth of its surperficial first ratchet, and this separation and reunion fluted disc has conical anchor ring towards ratchet seat direction, can expand the arrangement in the number of teeth of its surperficial second ratchet, and the number of teeth that makes separation and reunion fluted disc and driven fluted disc interlock of each other is more, bears the power on average and stabilizes, and the messenger tramples the smooth and easy firm again of transmission that the bicycle went forward.
3. Because the utility model discloses the composition surface of driven fluted disc is conical, the anchor ring of separation and reunion fluted disc is conical, promote by the elasticity of bias voltage component when the separation and reunion fluted disc and lean on to driven fluted disc, and then when making the second ratchet on the separation and reunion fluted disc anchor ring mesh mutually with the first ratchet on the composition surface of driven fluted disc, because conical anchor ring has the guide effect, can be fast and accurate let the second ratchet of separation and reunion fluted disc mesh mutually with the first ratchet of driven fluted disc, and degree of closure is accurate, reach quick transmission, make the ratchet seat drive flower-drum casing rotation rapidly make the bicycle walk forward fast.
Drawings
Fig. 1 is a combined perspective view of an embodiment of the present invention;
FIG. 2 is an exploded perspective view of an embodiment of the present invention;
fig. 3 is an exploded perspective view of the embodiment of the present invention in another direction;
fig. 4A is a combined cross-sectional view of an embodiment of the present invention;
FIG. 4B is an enlarged view of a portion of FIG. 4A;
FIG. 4C is an action diagram of FIG. 4B.
Symbolic illustration in the drawings:
10: a mandrel;
101: a first end;
102: a second end;
103: a first bearing;
104: a second bearing;
105: a first cover;
106: a second cover;
107: a third bearing;
108: a fourth bearing;
109: a sleeve;
110: a positioning ring;
20: a hub housing;
21: an accommodating space;
22: a retaining wall;
23: a baffle ring;
231: a diametral plane;
232: an annular wall;
24: an internal thread;
30: a ratchet seat;
31: a convex ring;
32: a first cog;
33: a stop ring;
34: a dust-proof sleeve;
40: a driven fluted disc;
41: a first inner diameter;
42: an external thread;
43: a bonding surface;
44: a first ratchet;
45: an outer diametric plane;
46: a tool engagement configuration;
50: a clutch fluted disc;
51: a second inner diameter;
52: a second cog;
53: an annulus;
54: a second ratchet;
60: a biasing member.
Detailed Description
The present invention will now be described in further detail by way of examples, but it is to be understood that these examples are for illustrative purposes only and are not to be construed as limiting the practice of the invention.
Referring to fig. 1 to 3 and fig. 4A to 4C, the present invention discloses a bicycle hub engaging and disengaging structure, which includes a spindle 10, a hub housing 20, a ratchet seat 30, a driven gear 40, an engaging and disengaging gear 50 and a biasing member 60.
The spindle 10 has a first end 101 and a second end 102 with different directions, the spindle 10 penetrates through the center of the hub shell 20, the hub shell 20 is rotatably sleeved on the spindle 10 by a first bearing 103 and a second bearing 104, the first bearing 103 is adjacent to the first end 101 of the spindle 10, the second bearing 104 is located at the middle position of the spindle 10, the first end 101 of the spindle 10 is screwed with a first sealing cover 105, and the second end 102 of the spindle 10 is screwed with a second sealing cover 106.
The hub shell 20 is a hollow body with two through ends, and is provided with an accommodating space 21 facing the direction of the ratchet seat 30, the diameter of the circle inside the accommodating space 21 is smaller than that of the circle of the accommodating space 21 to form a retaining wall 22, a retaining ring 23 is assembled inside the accommodating space 21, the retaining ring 23 is provided with a diameter surface 231 and an annular wall 232, the diameter surface 231 of the retaining ring 23 is attached to the retaining wall 22, the annular wall 232 of the retaining ring 23 is matched with the peripheral wall of the accommodating space 21, and the outer opening of the accommodating space 21 is provided with an internal thread 24.
The ratchet seat 30 is a hollow body, a convex ring 31 is arranged in the direction facing the hub shell 20, the convex ring 31 extends into the accommodating space 21 of the hub shell 20, a plurality of first cogs 32 are annularly arranged on the periphery of the convex ring 31, the first cogs 32 are arranged in parallel with the mandrel 10, a stop ring 33 is sleeved on the periphery of the ratchet seat 30, the outer diameter of the stop ring 33 is larger than that of the convex ring 31, an annular dust-proof sleeve 34 is sleeved on the periphery of the stop ring 33, and the opening of the accommodating space 21 of the hub shell 20 is sealed by the dust-proof sleeve 34. The ratchet seat 30 is rotatably sleeved on the spindle 10 through a third bearing 107 and a fourth bearing 108, so that the ratchet seat 30 can rotate around the spindle 10, a hollow sleeve 109 is arranged between the third bearing 107 and the fourth bearing 108, the sleeve 109 is sleeved on the spindle 10, a positioning ring 110 is arranged between the second bearing 103 and the third bearing 107, and the positioning ring 110 is sleeved on the spindle 10.
The driven gear 40 is a circular ring body having a first inner diameter 41, the first inner diameter 41 is sleeved on the outer periphery of the protruding ring 31 of the ratchet seat 30, the outer periphery of the driven gear 40 is provided with an external thread 42, the external thread 42 is screwed with the internal thread 24 of the hub shell 10, the driven gear 40 has a conical joint surface 43 facing the hub shell 10, the joint surface 43 is annularly distributed with a plurality of first ratchet teeth 44, an outer radial surface 45 facing the ratchet seat 30 of the driven gear 40 faces the stop ring 33 of the ratchet seat 30, one side of the driven gear 40 facing the ratchet seat 30 is provided with a tool joint configuration 46 for a tool to be jointed to tightly clamp the driven gear 40 on the hub shell 20, the tool joint configuration 46 of the embodiment is provided with a plurality of grooves on a radial surface ring of one side of the ratchet seat 30.
The clutch fluted disc 50 is a circular ring body having a second inner diameter 51, a plurality of second cogs 52 are annularly distributed on the second inner diameter 51, the second cogs 52 are arranged in parallel with the mandrel 10, the second cogs 52 are engaged with the first cogs 32 of the ratchet seat 30, the clutch fluted disc 50 has a conical ring surface 53 facing the ratchet seat 30 direction, a plurality of second ratchets 54 are annularly distributed on the ring surface 53, the second ratchets 54 are engaged with the first ratchets 44 of the driven fluted disc 40, and the number of teeth of the first ratchets 44 and/or the second ratchets 54 can be 72 teeth, 90 teeth or 120 teeth.
The biasing member 60 is axially retractable in a plurality of helical turns, and as viewed in the axial direction of the mandrel 10, the biasing member 60 has a taper and is disposed around the outer periphery of the collar 31 of the ratchet seat 30, the biasing member 60 is located between the clutch toothed disc 50 and the retaining wall 22 of the hub shell 20, in this embodiment, the biasing member 60 is located between the clutch toothed disc 50 and the retaining ring 23, an end of the biasing member 60 contacting the radial surface 231 of the retaining ring 23 is a large diameter, an end of the biasing member 60 contacting the clutch toothed disc 50 is a small diameter, and the biasing member 60 pushes the clutch toothed disc 50 to engage with the driven toothed disc 40, so that the second ratchet teeth 54 of the clutch toothed disc 50 engage with the first ratchet teeth 44 of the driven toothed disc 40.
With this structure, referring to fig. 4A and 4B again, when the bicycle is stepped forward, the ratchet seat 30 is driven to rotate forward, the second cog 52 of the clutch cog 50 is engaged with the first cog 32 of the ratchet seat 30 to drive the clutch cog 50 to rotate forward, and the biasing member 60 constantly pushes the clutch cog 50 to lean against the driven cog 40, so that the second ratchet 54 of the clutch cog 50 is engaged with the first ratchet 44 of the driven cog 40, and the driven cog 40 is driven to rotate, and the external thread 42 on the periphery of the driven cog 40 is screwed with the internal thread 23 of the hub shell 10, so as to drive the hub shell 20 to rotate forward, and the wheel travels forward.
When the bicycle is pedaled reversely, the ratchet seat 30 is driven to rotate reversely, the second cog 52 of the clutch cog 50 engages with the first cog 32 of the ratchet seat 30 to drive the clutch cog 50 to rotate reversely, and when the second ratchet 54 of the clutch cog 50 rotates reversely, the second cog 44 of the driven cog 40 is pushed away to the biasing member 60 to displace and compress the biasing member 60 as shown in fig. 4C, the driven cog 40 is not driven by the clutch cog 50, so that the hub shell 20 is in an idle state and cannot drive the wheel to move forward.
In the transmission, since the clutch gear 50 on the ratchet seat 30 can be engaged with the driven gear 40 under the elastic force of the biasing member 60, and the driven gear 40 drives the hub shell 10 to rotate, so that the bicycle moves forward, the hub shell 10 is driven to rotate by the minimum number of components compared with the prior art, and the clutch gear 50 and the driven gear 40 have a large number of engaged teeth and a large engagement area, thereby achieving the purposes of quick transmission response and convenient assembly.
It should be noted that the utility model discloses borrow by driven fluted disc 40 and have conical composition surface 43, and clutch fluted disc 50 has conical anchor ring 53, lean on to driven fluted disc 40 when clutch fluted disc 50 receives the spring action of biasing component 60, when making second ratchet 54 on clutch fluted disc 50 anchor ring 53 and the first ratchet 44 on the composition surface 43 of driven fluted disc 40 mesh mutually, clutch fluted disc 50's conical anchor ring 53 has the guide effect, can let clutch fluted disc 50's second ratchet 54 and driven fluted disc 40's first ratchet 44 mesh mutually fast and accurately, reach the accurate and fast transmission purpose of degree of closure.
The utility model discloses have following advantage at least:
1. the utility model discloses ratchet seat 30 is few with the rotatory component parts that makes the wheel walk forward of drive flower-drum casing 20, make simple structure equipment convenient, outside great reduce cost, ratchet seat 30 drives flower-drum casing 20 and produces rotatory component parts and keeps off ring 23, biasing component 60, separation and reunion fluted disc 50 and driven fluted disc 40, all dispose in the accommodation space 21 of flower-drum casing 20, sealed by the dirt proof boot 33 of ratchet seat 30 again, can prevent the dust of outside from getting into, can ensure the accurate meshing transmission of separation and reunion fluted disc 50 and driven fluted disc 40 in the accommodation space 21, it is more certain to make the foot step on pedal drive bicycle to walk forward, and reduce the fault rate.
2. The utility model discloses driven fluted disc 40 is conical composition surface 43 towards the direction of flower-drum casing 10, can expand the number of teeth of the arrangement at its surperficial first ratchet 44, and this separation and reunion fluted disc 50 has conical anchor ring 53 towards ratchet seat 30 direction, can enlarge the arrangement at its surperficial second ratchet 54's the number of teeth, and then makes the number of teeth of separation and reunion fluted disc 50 and driven fluted disc 40 interlock of each other more, and the transmission speed that the bicycle was walked forward is trampled in the order is fast firm again.
3. Because the utility model discloses the composition surface 43 of driven fluted disc 40 is conical, the anchor ring 53 of clutch fluted disc 50 is conical, when clutch fluted disc 50 is promoted by the elasticity of biasing component 60 and leans on to driven fluted disc 40, when making the first ratchet 44 on the second ratchet 54 on the anchor ring 53 of clutch fluted disc 50 and the composition surface 43 of driven fluted disc 40 eat mutually, conical anchor ring 53 has the guide effect, can just accurately let the second ratchet 54 of clutch fluted disc 50 mesh mutually with the first ratchet 44 of driven fluted disc 40 fast, can reach the good quick transmission of degree of contact, make ratchet seat 30 can drive flower-drum casing 20 fast and rotate in order to drive the bicycle and walk forward.
While the present invention has been disclosed in terms of the preferred embodiment, it will be understood by those skilled in the art that this embodiment is provided for illustration only, and should not be construed as limiting the scope of the invention. It should be noted that all equivalent changes and substitutions to the embodiments are intended to be included within the scope of the present invention. Therefore, the protection scope of the present invention is defined by the claims of the application.
Claims (10)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020404776.0U CN212685105U (en) | 2020-03-26 | 2020-03-26 | Bicycle hub clutch structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020404776.0U CN212685105U (en) | 2020-03-26 | 2020-03-26 | Bicycle hub clutch structure |
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| CN212685105U true CN212685105U (en) | 2021-03-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI874628B (en) * | 2021-03-29 | 2025-03-01 | 日商島野股份有限公司 | Bicycle rear wheel |
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- 2020-03-26 CN CN202020404776.0U patent/CN212685105U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI874628B (en) * | 2021-03-29 | 2025-03-01 | 日商島野股份有限公司 | Bicycle rear wheel |
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