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CN-224210829-U - Hub device and bicycle

CN224210829UCN 224210829 UCN224210829 UCN 224210829UCN-224210829-U

Abstract

The utility model provides a hub device and a bicycle, the flower-drum device comprises a connecting shaft, a tower foundation assembly, a flower-drum assembly and a ratchet wheel assembly. The connecting shaft comprises two sections which are oppositely arranged. The tower foundation assembly is rotatably connected to a section of the connecting shaft and is used for inputting power. The hub assembly is rotatably connected to the other section of the connecting shaft and is used for outputting power. The ratchet wheel assembly comprises a first ratchet wheel and a second ratchet wheel which are oppositely arranged, the first ratchet wheel is connected with the tower base assembly, and the second ratchet wheel is connected with the hub assembly. The first ratchet includes a first engagement end corresponding to the second ratchet, and the second ratchet includes a second engagement end corresponding to the first ratchet, the first engagement end and the second engagement end being partially engaged. According to the hub device provided by the embodiment of the utility model, the first engagement end of the first ratchet wheel and the second engagement end of the second ratchet wheel are arranged in a connection mode of opposite and partial engagement, so that friction resistance and tooth surface abrasion of the two ratchet wheels can be effectively reduced, and transmission efficiency and riding experience are improved.

Inventors

  • YANG DONGSHENG

Assignees

  • 深圳市飞锐照明有限公司

Dates

Publication Date
20260508
Application Date
20250508

Claims (10)

  1. 1. A flower-drum device, comprising: the connecting shaft comprises two sections which are oppositely arranged; the tower foundation assembly is rotationally connected to one section of the connecting shaft and is used for inputting power; The hub assembly is rotationally connected to the other section of the connecting shaft and is used for outputting power; The ratchet wheel assembly comprises a first ratchet wheel and a second ratchet wheel which are oppositely arranged, the first ratchet wheel is connected with the tower foundation assembly, and the second ratchet wheel is connected with the flower-drum assembly; the first ratchet includes a first engagement end corresponding to the second ratchet, the second ratchet includes a second engagement end corresponding to the first ratchet, and the first engagement end and the second engagement end are partially engaged.
  2. 2. The hub device of claim 1, wherein the first engagement end includes a first engagement zone and a first free zone, the first engagement zone and the first free zone alternating along a circumference of the first ratchet, the second engagement end includes a second engagement zone continuously along a circumference of the second ratchet, the first engagement zone and the second engagement zone engaging, or The first meshing end comprises first meshing areas, the first meshing areas are continuously distributed along the circumferential direction of the first ratchet wheel, the second meshing end comprises second meshing areas and second empty areas, the second meshing areas and the second empty areas are alternately distributed along the circumferential direction of the second ratchet wheel, and the first meshing areas and the second meshing areas are meshed.
  3. 3. The hub device of claim 1, wherein the first engagement end includes a plurality of first ratchet teeth circumferentially spaced apart and the second engagement end includes a plurality of second ratchet teeth circumferentially continuously spaced apart, the first ratchet teeth engaging the second ratchet teeth, or The first engagement end comprises a plurality of first ratchets distributed continuously along the circumferential direction, the second engagement end comprises a plurality of second ratchets distributed at intervals along the circumferential direction, and the first ratchets and the second ratchets are engaged.
  4. 4. A hub device according to any one of claims 1-3, wherein each first ratchet tooth of the first ratchet wheel comprises a first drive face and a first sliding face connected, each second ratchet tooth of the second ratchet wheel comprises a second drive face and a second sliding face connected, the first drive face and the second drive face being abuttable, the first sliding face and the second sliding face being relatively slidable; the first sliding surface and the second sliding surface are not equal.
  5. 5. The hub device of claim 4, wherein a ratio of a radial dimension of the first ratchet teeth to a radial dimension of the second ratchet teeth is between 0.4 and 0.8, or The ratio of the radial dimension of the second ratchet to the radial dimension of the first ratchet is between 0.4 and 0.8.
  6. 6. A hub device according to any one of claims 1-3, wherein the engagement ratio of the first ratchet and the second ratchet is between 0.4-0.7, or The meshing ratio of the second ratchet wheel and the first ratchet wheel is 0.4-0.7.
  7. 7. A hub device according to any one of claims 1-3, wherein the first ratchet teeth of the first ratchet wheel have a tip angle of between 50 ° and 65 °, and/or The tooth top angle of the second ratchet wheel is 50-65 degrees.
  8. 8. A hub device according to any of claims 1-3, wherein the first ratchet teeth of the first ratchet have a tooth height in the range of 0.6 mm-1 mm, and/or The range of the tooth height of the second ratchet teeth of the second ratchet wheel is between 0.6mm and 1 mm.
  9. 9. A drum device according to any one of claims 1-3, wherein the drum assembly comprises a drum shell, the outer circumferential surface of the drum shell being provided with a plurality of ring grooves extending in the rotational direction of the drum shell, the plurality of grooves being spaced apart along the rotational axis of the drum shell, and/or The flower-drum shell comprises two end parts which are oppositely arranged and a middle part which is connected between the two end parts, and the middle part of the flower-drum shell is bent towards the rotation axis of the flower-drum shell.
  10. 10. A bicycle, comprising: A frame; The front wheel is rotationally arranged on the front side of the frame; A rear wheel rotatably provided at the rear side of the frame, the rear wheel comprising the drum device according to any one of claims 1 to 9, the drum device being provided at the center of the rear wheel.

Description

Hub device and bicycle Technical Field The utility model relates to the technical field of bicycles, in particular to a hub device and a bicycle. Background The hub device is an important part for connecting spokes and transmitting power in a bicycle wheel. The rear wheel of the bicycle is used as a driving wheel of the bicycle, the hub device in the related art can comprise a hub, a tower foundation and a ratchet wheel set, the ratchet wheel set is arranged between the tower foundation and the hub, a rider treads the pedal to transmit the rotating force to the tower foundation through the transmission device, and the tower foundation transmits the rotating force to the hub through the ratchet wheel set. Referring to fig. 1, fig. 1 is a schematic structural diagram of a ratchet assembly in the related art. In the related art, the ratchet group comprises a pair of ratchet wheels with opposite end surfaces, the end surface of each ratchet wheel is fully distributed with ratchet teeth along the rotation direction, one ratchet wheel is connected with the tower base, the other ratchet wheel is connected with the flower drum, and the two ratchet wheels are meshed. When the hub device with the structure rotates on the tower foundation, the opposite ratchets in the ratchet group do sliding motion, so that larger friction resistance is generated, the transmission efficiency is reduced, and a rider can drive the bicycle to run only by stepping on the pedal more laboriously. When the bicycle is cruising, the abrasion of the ratchet tooth surface is accelerated by the larger friction resistance, and the service life is shortened. In order to solve the technical problems of the hub device in the related art, the common adopted improvement means is that firstly, a high-hardness wear-resistant material is used or wear of two ratchet wheels of a ratchet wheel assembly in the riding process of a bicycle is reduced in a surface plating (such as tungsten carbide) mode, and secondly, the consumption of lubricating grease is increased, the friction resistance between the two ratchet wheels is reduced, but the lubricating grease is easy to adsorb dust or other impurity particles, so that the wear of tooth surfaces of the ratchet wheels is aggravated, fatigue damage is caused, and the transmission performance is reduced. Disclosure of utility model The embodiment of the utility model provides a hub device and a bicycle, which can solve the technical problems of low transmission efficiency, poor riding experience and rapid abrasion of ratchet tooth surfaces of the hub device in the related art. The application provides a flower-drum device, comprising: the connecting shaft comprises two sections which are oppositely arranged; the tower foundation assembly is rotationally connected to one section of the connecting shaft and is used for inputting power; The hub assembly is rotationally connected to the other section of the connecting shaft and is used for outputting power; The ratchet wheel assembly comprises a first ratchet wheel and a second ratchet wheel which are oppositely arranged, the first ratchet wheel is connected with the tower foundation assembly, and the second ratchet wheel is connected with the flower-drum assembly; the first ratchet includes a first engagement end corresponding to the second ratchet, the second ratchet includes a second engagement end corresponding to the first ratchet, and the first engagement end and the second engagement end are partially engaged. In one embodiment, the first engagement end includes a first engagement region and a first free region, the first engagement region and the first free region alternately distributed along the circumference of the first ratchet, the second engagement end includes a second engagement region continuously distributed along the circumference of the second ratchet, the first engagement region and the second engagement region are engaged, or The first meshing end comprises first meshing areas, the first meshing areas are continuously distributed along the circumferential direction of the first ratchet wheel, the second meshing end comprises second meshing areas and second empty areas, the second meshing areas and the second empty areas are alternately distributed along the circumferential direction of the second ratchet wheel, and the first meshing areas and the second meshing areas are meshed. In one embodiment, the first engagement end includes a plurality of first ratchet teeth circumferentially spaced apart and the second engagement end includes a plurality of second ratchet teeth circumferentially continuously spaced apart, the first ratchet teeth engaging the second ratchet teeth, or The first engagement end comprises a plurality of first ratchets distributed continuously along the circumferential direction, the second engagement end comprises a plurality of second ratchets distributed at intervals along the circumferential direction, and the first ratche