Single-speed hub

Abstract

The utility model relates to a single-speed hub, which comprises a hub body which defines an axial direction and comprises a hub shell and a shaft rod assembly rotatably and axially penetrating through the hub shell, and the hub shell is axially and convexly provided with a threaded pipe section; the gear assembly comprises a ring joint seat and a single-speed gear ring, the ring joint seat is connected to the threaded pipe section in a threaded mode, the single-speed gear ring is arranged on the ring joint seat in a sleeved mode in a one-way rotating mode, a plurality of embedded concave parts are arranged on one side of the ring joint seat in the axial direction, the embedded concave parts are distributed at intervals in the axial direction, and the embedded concave parts can be connected with a plurality of embedded teeth of a dismounting sleeve of a bottom bracket (BB) middle shaft in an embedded mode. Therefore, an effective and stable assembling effect of the dismounting tool can be provided, and the dismounting tool is suitable for the dismounting sleeve of the five-way center shaft and is simple and convenient to use.

Description

Technical Field

[0001] The utility model relates to a vehicle component, in particular to a single-speed hub. Background Art

[0002] Due to environmental protection, energy conservation, carbon reduction or health needs, cycling has become increasingly popular. In addition, cycling not only has the effect of environmental protection, but also has functions such as strengthening the body and relieving stress. Therefore, cycling is widely loved by modern people.

[0003] When a bicycle is about to move forward, the rider drives the large chainring to rotate by stepping on the pedals. The large chainring then drives the freewheel to rotate through a chain. Furthermore, the freewheel cooperates with the hub structure to drive the rim to rotate. Among them, the hub generally includes a hub body, an axle center and a gear assembly. The gear assembly is used to transmit the acting force to the hub body; the hub body then drives the rim through a plurality of spokes.

[0004] However, in the known hub, the gear assembly is screwed to the hub body, and the axle center axially protrudes beyond the hub body and the gear assembly. Therefore, when disassembling and assembling the gear assembly, the axle center is likely to interfere with the operation of the disassembly tool. Thus, it is necessary to use multiple disassembly tools in combination, which is extremely inconvenient in operation.

[0005] Therefore, it is necessary to provide a novel and progressive hub to solve the above problems.

[0006] Therefore, it is necessary to provide a novel and progressive single-speed hub to solve the above problems. Summary of the Utility Model

[0007] The main purpose of the utility model is to provide a single-speed hub, which can provide an effective and stable connection effect of the disassembly tool, and is applicable to the disassembly sleeve of the bottom bracket spindle, and is simple and convenient to use.

[0008] To achieve the above purpose, the utility model provides a single-speed hub, including: a hub body, defining an axial direction, including a hub shell and a shaft rod assembly rotatably axially penetrating the hub shell, the hub shell axially protruding with a threaded pipe section; and a gear assembly, including an annular seat screwed to the threaded pipe section and a single-speed gear ring rotatably sleeved on the annular seat in one direction, the annular seat is provided with a plurality of concave portions on one side in the axial direction, the plurality of concave portions are spaced apart around the axial direction, and the plurality of concave portions can be mutually engaged with a plurality of engaging teeth of a disassembly sleeve of a bottom bracket (BB) spindle.

[0009] Viewed along the axial direction, there is an annular space between the inner ring surface of the annular seat and the shaft rod assembly, and the annular space allows the barrel wall of the disassembly sleeve to pass through so that the plurality of engaging teeth are engaged with the plurality of concave portions.

[0010] The ring connection base includes a bushing screwed onto the threaded pipe section and a ring cover screwed onto the bushing. The single-speed gear ring is disposed between the bushing and the ring cover.

[0011] The outer peripheral surface of the bushing is provided with a plurality of axially extending grooves, and the inner ring surface of the ring cover radially covers each of the grooves to form a passage.

[0012] One side of the ring cover in the axial direction includes a plurality of radially opposed concave holes for engaging a tool.

[0013] The number of the plurality of recesses is not less than 10.

[0014] The number of the plurality of recesses is 20.

[0015] The number of the plurality of recesses is greater than the number of teeth of the single-speed gear ring.

[0016] The ring connection base includes an internal thread section and a ring flange, and the ring flange includes the plurality of recesses.

[0017] In the axial direction, the depth of each of the recesses is not less than 0.5 times the thickness of the ring flange.

[0018] Advantages of the present utility model: A single-speed freewheel of the present utility model can provide an effective and stable assembling effect of a disassembly tool, and can be applied to a disassembly sleeve of a bottom bracket spindle, and is simple and convenient to use. Description of the Drawings

[0019] Figure 1 Is a perspective view of an embodiment of the present utility model.

[0020] Figure 2 Is an exploded view of an embodiment of the present utility model.

[0021] Figure 3 Is an axial side view of an embodiment of the present utility model.

[0022] Figure 4 Is an exploded view of a gear assembly of an embodiment of the present utility model.

[0023] Figure 5 Is a schematic view of the cooperation between a gear assembly and a disassembly sleeve of an embodiment of the present utility model.

[0024] 1: Single-speed freewheel

[0025] 10: Freewheel body

[0026] 11: Axial direction

[0027] 12: Freewheel housing

[0028] 121: Threaded pipe section

[0029] 13: Shaft rod assembly

[0030] 20: Gear assembly

[0031] 21: Ring connection seat

[0032] 211: Embedded recess

[0033] 212: Bush

[0034] 213: Ring cover

[0035] 214: Groove

[0036] 215: Duct

[0037] 216: Concave hole

[0038] 217: Internal thread section

[0039] 218: Ring flange

[0040] 22: Single-speed gear ring

[0041] 30: Ball

[0042] 100: Disassembly sleeve

[0043] 101: Embedded tooth

[0044] G: Ring spacing space Detailed implementation manner

[0045] The following only uses embodiments to illustrate the possible implementation modes of the present invention, but is not intended to limit the scope of protection of the present invention. This is stated first for clarification.

[0046] Please refer to Figures 1 to 5 , which shows an embodiment of the present invention. The single-speed freewheel 1 of the present invention includes a freewheel body 10 and a gear assembly 20.

[0047] The freewheel body 10 defines an axis 11. The freewheel body 10 includes a freewheel housing 12 and a shaft rod assembly 13 that is rotatably axially inserted through the freewheel housing 12. The freewheel housing 12 axially protrudes with a threaded pipe section 121. The gear assembly 20 includes a ring connection seat 21 screwed to the threaded pipe section 121 and a single-speed gear ring 22 that is rotatable in one direction and sleeved on the ring connection seat 21. The ring connection seat 21 is provided with a plurality of embedded recesses 211 on one side in the axial direction 11. The plurality of embedded recesses 211 are spaced apart around the axial direction 11. The plurality of embedded recesses 211 can be mutually engaged with a plurality of embedded teeth 101 of a disassembly sleeve 100 of a bottom bracket (BB) spindle. Thereby, the plurality of embedded recesses 211 can provide an effective and stable connection effect of the disassembly tool, and can be simultaneously applicable to the disassembly sleeve 100 of the bottom bracket spindle, and is simple and convenient to use.

[0048] Viewed along the axial direction 11, there is an annular spacing space G between the inner ring surface of the ring connection seat 21 and the shaft rod assembly 13. The annular spacing space G allows the wall of the disassembly sleeve 100 to pass through, so that the multiple engaging teeth 101 can be engaged with the multiple engaging recesses 211. In this way, the disassembly sleeve 100 will not be interfered by the shaft rod assembly 13, and can be directly sleeved to perform the disassembly operation of the gear assembly 20.

[0049] Specifically, the ring connection seat 21 further includes a shaft sleeve 212 screwed to the threaded pipe section 121 and a ring cover 213 screwed to the shaft sleeve 212. The single-speed gear ring 22 is disposed around the shaft sleeve 212 and the ring cover 213. The outer peripheral surface of the shaft sleeve 212 is provided with a plurality of axially extending grooves 214. The inner ring surface of the ring cover 213 radially covers each of the grooves 214 to form a passage 215, and auxiliary substances such as lubricating oil can be injected into the passage 215. One side of the ring cover 213 in the axial direction 11 includes a plurality of radially opposite concave holes 216, and the plurality of concave holes 216 are for a tool to be engaged, which is beneficial to the installation and disassembly of the ring cover 213.

[0050] Preferably, the number of the plurality of engaging recesses 211 is not less than 10, which can provide a stronger and more stable assembling effect. In this embodiment, the number of the plurality of engaging recesses 211 is 20, and the number of the plurality of engaging recesses 211 is greater than the number of teeth of the single-speed gear ring 22, which helps to evenly distribute the torque of the disassembly sleeve 100 and can reduce damage.

[0051] The ring connection seat 21 further includes an internal thread section 217 and a ring flange 218, and the ring flange 218 includes the plurality of engaging recesses 211. Preferably, in the axial direction 11, the depth of each of the engaging recesses 211 is not less than 0.5 times the thickness of the ring flange 218. Thereby, the portion where the plurality of engaging recesses 211 are engaged with the plurality of engaging teeth 101 of the disassembly sleeve 100 is larger, the engagement is stable and not easy to slip off, and it ensures the effective transmission of the torque of the disassembly sleeve 100. In this embodiment, the depth of each of the engaging recesses 211 is about 0.75 times the thickness of the ring flange 218. However, according to different structural forms, material properties of components, etc., it can also be designed as other ratios, such as other values such as 0.6, 0.65, 0.7, 0.8, 0.85, etc.

[0052] In addition, a plurality of balls 30 are respectively disposed in an annular shape between one side of the ring connection seat 21 and the shaft sleeve 212, and between the other side of the ring connection seat 21 and the ring cover 213. Thereby, the rotational friction of the single-speed gear ring 22 can be greatly reduced, and the plurality of balls 30 disposed on the opposite two sides of the ring connection seat 21 can greatly improve the rotational smoothness and rotational balance of the single-speed gear ring 22.

Claims

1. A single-speed hub, characterized in that: include: A hub body is defined with an axial direction, comprising a hub shell and a shaft assembly rotatably and axially penetrated in the hub shell, wherein a threaded tube section is axially protruded from the hub shell; and A gear assembly includes an annular seat screwed to the threaded pipe section and a single-speed gear ring unidirectionally rotatably sleeved on the annular seat. The annular seat is provided with a plurality of recesses on one side in the axial direction. The plurality of recesses are spaced around the axial direction and can be engaged with a plurality of cogs of a disassembly sleeve of a five-way middle shaft.

2. The single-speed hub according to claim 1, characterized in that: Viewed along the axial direction, there is an annular spacing space between the inner annular surface of the annular seat and the shaft assembly, and the annular spacing space allows the wall of the disassembly sleeve to pass through so that the multiple cogs are engaged with the multiple recesses.

3. The single-speed hub according to claim 1, characterized in that: The annular seat comprises a shaft sleeve threadedly connected to the threaded pipe section and a ring cover threadedly connected to the shaft sleeve, and the single-speed gear ring is arranged between the shaft sleeve and the ring cover.

4. The single-speed hub according to claim 3, characterized in that: The outer peripheral surface of the shaft sleeve is provided with a plurality of axially extending grooves, and the inner ring surface of the ring cover radially covers each of the grooves to form a channel.

5. The single-speed hub according to claim 3, characterized in that: The ring cover comprises a plurality of concave holes arranged opposite to each other in the radial direction on one side in the axial direction, and the plurality of concave holes are provided for clamping with a tool.

6. The single-speed hub according to claim 1, characterized in that: The number of the plurality of recesses is not less than ten.

7. The single-speed hub according to claim 6, characterized in that: The number of the plurality of recesses is 20.

8. The single-speed hub according to claim 6, characterized in that: The number of the plurality of recesses is greater than the number of teeth of the single-speed gear ring.

9. The single-speed hub according to any one of claims 1 to 8, characterized in that: The annular seat includes an internal thread section and an annular flange, and the annular flange includes the plurality of recesses.

10. The single-speed hub according to claim 9, characterized in that: In the axial direction, the depth of each recess is not less than 0.5 times the thickness of the annular flange.

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