TW201307102A - Ratchet hub - Google Patents

Abstract

A ratchet hub working on magnetic repulsion principle is disclosed. The ratchet hub includes a hub body whose one end formed with a ratchet shell. The ratchet shell receives therein a sliding sleeve, a positioning ring, a magnetic ring, a pushing ring equipped with a plurality of magnetic members, a ratchet ring in order. A shaft passes through and thereby link up the hub body and a freewheel set so that the components received in the ratchet shell are held therebetween. The magnetic ring and the magnetic members on the pushing ring are such arranged that their facing surfaces are of the same magnetic pole. Thereby, magnetic repulsion generated between the magnetic ring and the pushing ring normally pushes the ratchet ring toward the freewheel set, so as to make ratchet teeth of the ratchet ring engage with retaining teeth formed on the freewheel set.

Description

Magnetic floating ratchet flower hub structure

This case is related to the bicycle hub. In more detail, it refers to a source of resetting force using magnetic force as a one-way ratchet device, which has the advantages of low resistance and inelastic fatigue, and further, has a forward transmission, Reverse idling is quick and difficult to get stuck.

It is known that the flower hub of the rear wheel of the bicycle uses a spring as a source of resetting force of the one-way ratchet device. The one-way ratchet device has sufficient elastic force of the return spring to smoothly push the ratchet block back to the position, and relatively The resistance formed is also large. Moreover, the spring is used over a long period of time, and the elastic fatigue is also caused, so that the one-way ratchet device cannot be smoothly reset, so that the flower hub cannot be smoothly driven.

Another flower hub ratchet device disclosed in the Chinese Patent No. M330208 includes a ring, a ratchet block, a lateral annular ratchet disposed on an end face of a flywheel device, and more than one disposed on the ratchet block. The permanent magnet of the flywheel device uses the adsorption magnetic force generated between the permanent magnet, the ratchet block and the collar as the resetting force of the ratchet block, so that the lateral annular ratchet and the flywheel device reach the one-way transmission, and the resistance is small. The advantage of inelastic fatigue.

However, the ratchet block and the collar of the hub one-way ratchet device need to be made of magnetic metal, but the ratchet block itself needs to be processed at one end to form a lateral annular ratchet, the ratchet block and the collar. The joint surface also needs to be processed to form a shape of the rotational rotation limit. If it is directly processed by a magnetic conductive metal, it is easy to reduce or disappear the magnetic force due to cutting, high temperature and impact during the processing, if it is after processing. Re-magnetizing the ratchet block and the collar will not only increase the manufacturing process, but also increase the cost. It is more likely that the magnetized ratchet block and the collar have too many concave and convex surfaces, resulting in poor magnetization.

Moreover, since the parts of the hub one-way ratchet device are mostly composed of metal magnetically permeable materials, especially the flywheel device, the lateral annular ratchet of the ratchet block is meshed with the flywheel device due to the magnetic properties of the ratchet block. The close adsorption causes the ratchet block to be separated from the flywheel device when the ratchet device is reversely rotated, and the iron scrap is easily adsorbed and invaded, resulting in loss of parts.

In view of the above problems, the present invention provides a magnetic floating ratchet hub structure, which has the advantages of small actuation resistance and inelastic fatigue, and has a simple structure and convenient assembly, and can reliably avoid the ratchet hub parts. The problem of being difficult to separate due to magnetic adsorption.

The invention relates to a magnetic floating ratchet flower hub structure, which mainly comprises: a magnetic floating ratchet flower hub structure, which mainly comprises: a flower hub, wherein a hollow ratchet chamber is arranged at one end of the flower hub, and the flower hub A shaft hole is formed in the center of the seat, wherein the shaft hole is connected with a hollow sliding sleeve at the opening of the ratchet chamber, and the outer peripheral surface of the sliding sleeve is provided with a plurality of sliding along the axial direction of the hub. a rotating shaft, which is disposed in the shaft hole and the sliding sleeve, so that the flower hub can rotate on the rotating shaft; a magnetic ring is fixed on the wall surface of one end of the proximal shaft hole of the ratchet chamber a ratchet ring having a through hole at a center of the hole, wherein a plurality of sliding teeth are disposed at a periphery of the hole of the hole, and the sliding tooth can be fitted into the sliding groove to be adjacent to the magnetic ring On the sliding sleeve, and the ratchet ring is movable on the sliding sleeve to generate axial slip, wherein the ratchet ring is provided with a plurality of one-way ratchets toward the other side of the magnetic ring; a flywheel seat, The sleeve is rotatably sleeved on the rotating shaft at one end of the ratchet chamber, adjacent thereto One side of the ratchet ring is provided with a plurality of meshing teeth; and a push ring is disposed between the magnetic ring and the ratchet ring, and the magnetic ring is embedded with a plurality of magnetic members, and the magnetic The ring system is oppositely arranged for the magnetic repulsive surface.

One of the effects achieved by the present invention is that since the push ring and the magnetic ring are opposite to each other, the magnetic force generated by the normal between the push ring and the magnetic ring can be used as a reset action of the one-way ratchet and the meshing tooth. The source of strength is to achieve the advantages of low resistance to movement and no traditional spring elastic fatigue.

According to the second aspect of the present invention, the magnetic force of the push ring is derived from the magnetic member embedded thereon, and the peripheral edge of the perforated ring of the ratchet ring extends toward the side of the magnetic ring to provide a connecting portion for the push ring to be The sleeve is fixed on it as a source of power between the magnetic ring and the ratchet ring. The ratchet ring itself can be designed into a complex shape according to the function required, which is not only simple in structure, easy to assemble, and less likely to be learned. It is difficult to process the technology and reduce the magnetic force.

According to the third aspect of the invention, at least one of the ratchet ring or the flywheel seat is made of a non-magnetic material, and when the magnetic member is attached or approached, the one-way ratchet and meshing are not caused by magnetic conduction. The teeth are magnetically attracted to each other and difficult to separate, which causes the ratchet hub to fail to operate properly.

For the convenience of the description, the central idea expressed in the column of the above summary of the present invention is expressed by a specific embodiment. The various items in the embodiments are drawn to scale as illustrated and not to the actual proportions of the elements.

As shown in the first to fourth figures, the magnetic floating ratchet hub structure of the present invention mainly comprises: a flower hub 10, and a hollow ratchet chamber 11 is disposed at one end of the flower hub 10, and A shaft hole 12 is formed in the center of the flower hub 10, wherein the shaft hole 12 is fastened to the opening of the ratchet chamber 11 with a hollow sliding sleeve 13 , and the outer peripheral surface of the sliding sleeve 13 is along the flower hub The axial recess of 10 is provided with a plurality of sliding slots 14; a rotating shaft 20 is disposed in the shaft hole 12 and the sliding sleeve 13, so that the flower hub 10 can rotate on the rotating shaft 20; 30, which is fixed at the wall surface of one end of the proximal shaft hole 12 of the ratchet chamber 11, and a positioning ring 31 is disposed between the magnetic ring 30 and the flower hub 10, and the positioning ring 31 has a central hole 32 for A positioning protrusion 33 is protruded from a periphery of the center hole 32 of the positioning ring 31 so that the magnetic ring 30 can be locked with the positioning ring 31, and the positioning ring 31 is fastened. Made of elastic material, the cymbal is elastically supported against the wall surface of the proximal shaft hole 12 of the ratchet chamber 11; a ratchet ring 40 is provided with a shaft at its center. 41. A plurality of sliding teeth 42 are disposed at a periphery of the hole of the through hole 41. The sliding teeth 42 can be fitted into the sliding slot 14 so as to be sleeved on the sliding sleeve 13 adjacent to the magnetic ring 30, and The ratchet ring 40 is movable on the sliding sleeve 13 to generate an axial slip, wherein the ratchet ring 40 is provided with a plurality of one-way ratchet teeth 43 at the other side of the magnetic ring 30, and the ratchet ring 40 A peripheral end of the through hole 41 extends toward a side of the magnetic ring 30; a flywheel seat 50 is rotatably sleeved on the rotating shaft 20 at one end of the ratchet chamber 11 and adjacent to one of the ratchet rings 40 A plurality of meshing teeth 51 are disposed on the side; a push ring 60 is sleeved and fixed on the sleeve portion 44 of the ratchet ring 40 to be disposed between the magnetic ring 30 and the ratchet ring 40. A plurality of magnetic members 61 are embedded on the ring 60, and the magnetic ring 30 is disposed opposite to the magnetic repulsive surface, so that a normal magnetic force is generated between the push ring 60 and the magnetic ring 30, so that the one-way The ratchet 43 is normally meshed with the meshing teeth 51; and a plurality of bearings 70 are respectively disposed between the rotating shaft 20 and the flower hub 40, and the rotating shaft 20 and the flywheel housing 50 , So that the rotary shaft 20 and the hub 10 flowers, the rotary shaft 20 and the rotation shaft 50 can be smoothly flywheel housing.

Wherein, at least one of the ratchet ring 40 or the flywheel base 50 is made of a non-magnetic material.

After the above detailed structure of the present invention is clarified, the following is a detailed description of the operation principle of the present invention: as shown in the fifth drawing, the present invention generates a pushing magnetic force by the normal state between the pushing ring 60 and the magnetic ring 30. The one-way ratchet teeth 43 are normally meshed with the meshing teeth 51. When the flywheel base 50 rotates in the forward direction (such as the user stepping on the bicycle pedal to advance the bicycle), the one-way ratchet teeth 43 and the meshing teeth 51 can be tightly engaged, and the flywheel base 50 sequentially drives the spines. The ring gear 40, the sliding sleeve 13 and the flower hub 10 rotate the flower hub 10 on the rotating shaft 20.

As shown in the sixth figure, when the flywheel base 50 is rotated in the reverse direction, due to the toothed design of the one-way ratchet teeth 43, the meshing teeth 51 generate a force to push the ratchet ring 40, and this pushing force When the pushing force between the pushing ring 60 and the magnetic ring 30 is greater than that, the ratchet ring 40 is pushed to slide in the direction of the magnetic ring 30 on the sliding sleeve 13, and the one-way ratchet 43 is separated from the meshing teeth 51, that is, The flywheel seat 50 can be idling on the rotating shaft 20. When the flywheel seat 50 is rotated forward again to make the pushing force disappear, the pushing magnetic force between the pushing ring 60 and the magnetic ring 30 can immediately push the ratchet ring 40 back to the original position, and the one-way ratchet 43 and the meshing tooth 51 are quickly Engage to achieve rapid response.

The magnetic force generated by the normal state between the push ring 60 and the magnetic ring 30 is used as a source of the power of the resetting of the one-way ratchet 43 and the meshing tooth 51, and has the advantages of small actuation resistance and rapid response, and the magnetic ring 30 and The magnetic member 61 is a permanent magnet, and the magnetic property is not lost due to long-term use, no conventional spring elastic fatigue phenomenon, and has the advantages of long service life and durability.

Furthermore, at least one of the ratchet ring 40 or the flywheel base 50 is made of a non-magnetic material. When the magnetic member 61 is attached or approached, the one-way ratchet 43 is not meshed due to magnetic conduction. The teeth 51 are magnetically attracted to each other and are difficult to separate, resulting in the ratchet hub not being able to operate properly. At the same time, it can prevent the external iron scraps and other substances from being magnetically drawn into the interior, causing the parts to wear too fast.

Although the present case is illustrated by a preferred embodiment, those skilled in the art can make various forms of changes without departing from the spirit and scope of the present invention. The above embodiments are only used to illustrate the present case and are not intended to limit the scope of the present invention. All kinds of modifications or changes that are not in violation of the spirit of the case are the scope of patent application in this case.

10. . . Flower hub

11. . . Ratchet room

12. . . Shaft hole

13. . . Sliding sleeve

14. . . Sliding slot

20. . . Rotating shaft

30. . . Magnetic ring

31. . . Locating ring

32. . . Center hole

33. . . Positioning abrupt

40. . . Ratchet ring

41. . . perforation

42. . . Sliding tooth

43. . . One-way ratchet

44. . . Socket

50. . . Flywheel seat

51. . . Meshing teeth

60. . . Push ring

61. . . Magnetic parts

70. . . Bearing

The first figure is a schematic diagram of the stereoscopic appearance of the present invention.

The second drawing is a schematic exploded view of the present invention.

The third figure is a schematic cross-sectional view of the combination of the present invention.

The fourth figure is a partially enlarged schematic view of the third figure.

The fifth figure is a schematic diagram of a partial cross-sectional action of the present invention (1).

The sixth drawing is a schematic diagram of a partial cross-sectional action of the present invention (2).

10. . . Flower hub

11. . . Ratchet room

12. . . Shaft hole

13. . . Sliding sleeve

14. . . Sliding slot

20. . . Rotating shaft

30. . . Magnetic ring

31. . . Locating ring

32. . . Center hole

33. . . Positioning abrupt

40. . . Ratchet ring

41. . . perforation

42. . . Sliding tooth

43. . . One-way ratchet

44. . . Socket

50. . . Flywheel seat

51. . . Meshing teeth

60. . . Push ring

61. . . Magnetic parts

Claims (9)

The utility model relates to a magnetic floating ratchet hub structure, which mainly comprises: a flower hub, a hollow ratchet chamber is arranged at one end of the flower hub, and a shaft hole is arranged in the center of the flower hub, wherein the shaft hole is arranged on the ratchet A hollow sliding sleeve is fastened to the opening of the chamber, and the outer peripheral surface of the sliding sleeve is recessed along the axial direction of the flower hub to provide a plurality of sliding grooves; a rotating shaft is threaded through the shaft hole and sliding Inside the sleeve, the flower hub can be rotated on the rotating shaft; a magnetic ring is fixed on the wall surface of one end of the proximal shaft hole of the ratchet chamber; a ratchet ring is provided with a perforation at the axial center thereof. a plurality of sliding teeth are disposed at a circumference of the perforated hole, and the sliding teeth can be fitted into the sliding groove, and the magnetic ring is sleeved on the sliding sleeve, and the ratchet ring can be sleeved on the sliding sleeve The upper movement generates an axial slip, wherein the ratchet ring is provided with a plurality of one-way ratchets on the other side of the magnetic ring; a flywheel seat is rotatably sleeved on the rotating shaft at one end of the ratchet chamber a plurality of meshing teeth adjacent to one side of the ratchet ring; and a push ring The magnetic ring and the ratchet ring are disposed on the push ring, and a plurality of magnetic members are embedded on the push ring, and the magnetic ring is disposed opposite to the magnetic repulsive surface, so that the push ring and the magnetic ring are arranged. Normally, a magnetic force is generated, and the one-way ratchets are normally meshed with the meshing teeth. The magnetic floating ratchet hub structure according to claim 1, wherein the peripheral edge of the ratchet ring has a connecting portion extending toward a side of the magnetic ring, so that the pushing ring can be sleeved and fixed thereon. . The magnetic floating ratchet hub structure according to claim 1, further comprising a positioning ring, the positioning ring having a central hole for being disposed on the sliding sleeve, and the positioning ring is disposed on the sliding ring Between the magnetic ring and the flower hub. The magnetic floating ratchet hub structure according to claim 3, wherein a positioning protrusion is protruded from a periphery of the center hole of the positioning ring, so that the magnetic ring can be locked and fixed with the positioning ring. The magnetic floating ratchet hub structure according to claim 4, wherein the positioning ring is made of an elastic material, and the elastic body is elastically supported against the wall surface of the proximal hole of the ratchet chamber. The magnetic floating ratchet hub structure according to claim 1, wherein the ratchet ring is made of a non-magnetic material. The magnetic floating ratchet hub structure according to claim 1, wherein the flywheel seat is made of a non-magnetic material. The magnetic floating ratchet hub structure according to claim 1, wherein at least one bearing is disposed between the rotating shaft and the flower hub. The magnetic floating ratchet hub structure according to claim 1, wherein at least one bearing is disposed between the rotating shaft and the flywheel housing.