Bicycle hub structure

Patent metadata

Field	Value
Publication number	US-11110743-B2
Application number	US-201916693464-A
Country	US
Kind code	B2
Filing date	Nov 25, 2019
Priority date	Nov 25, 2019
Publication date	Sep 7, 2021
Grant date	Sep 7, 2021

Abstract

A bicycle hub structure includes: a hub body including a first clutch ring, a sprocket support body connecting to the hub body and including a second clutch ring, first magnets and a magnetic ring. The magnetic ring is disposed on an axial side of the second clutch ring far away from the hub body, and the first magnets are disposed on a side of the second clutch ring adjacent to the magnetic ring. The sprocket support body includes a first state and a second state. In the first state, the first magnets and the magnetic ring attract the first clutch ring, so that the first clutch ring is in contact with the second clutch ring, and in the second state, a magnetic attracting force of the first magnets and the magnetic ring on the first clutch ring is less than that in the first state.

First claim

What is claimed is:

1. A bicycle hub structure, comprising:
a hub body, comprising a first clutch ring;
a sprocket support body, connecting to the hub body and comprising a second clutch ring, a plurality of first magnets and a magnetic ring, wherein the magnetic ring is disposed on an axial side of the second clutch ring far away from the hub body, and the plurality of first magnets are disposed on a side of the second clutch ring adjacent to the magnetic ring; and
a hub axle, passing through the hub body and the sprocket support body, and having a plurality of bearings disposed between the hub axle and both the hub body and the sprocket support body, wherein
a first torque transmission mechanism is disposed between the second clutch ring and the sprocket support body, and a second torque transmission mechanism is disposed between the first clutch ring and the second clutch ring;
a third torque transmission mechanism is disposed between the first clutch ring and the hub body; and
the sprocket support body comprises a first state and a second state, wherein in the first state, the first magnets and the magnetic ring attract the first clutch ring, to enable the first clutch ring to engage the second clutch ring, so that torque is transmitted from the sprocket support body to the hub body through the second clutch ring and the first clutch ring; and in the second state, a magnetic attracting force of the first magnets and the magnetic ring on the first clutch ring is less than that in the first state.

2. The bicycle hub structure according to claim 1 , wherein the plurality of first magnets are equidistantly and annularly disposed on the side of the second clutch ring adjacent to the magnetic ring, a plurality of second magnets are equidistantly and annularly disposed on the magnetic ring, and the plurality of first magnets and the plurality of second magnets are disposed opposite to each other.

3. The bicycle hub structure according to claim 2 , wherein polarities of two adjacent ends of two adjacent first magnets are different, and polarities of two adjacent ends of two adjacent second magnets are different.

4. The bicycle hub structure according to claim 3 , wherein in the first state, the plurality of first magnets and the plurality of second magnets exert repelling forces against each other, and the plurality of first magnets and the plurality of second magnets attract the first clutch ring to engage the second clutch ring, to form the second torque transmission mechanism.

5. The bicycle hub structure according to claim 3 , wherein in the second state, the plurality of first magnets and the plurality of second magnets exert attracting forces on each other, and the plurality of first magnets and the plurality of second magnets do not attract the first clutch ring.

6. The bicycle hub structure according to claim 1 , wherein at least one first convex portion and at least one accommodating groove are disposed on an inner periphery edge of the sprocket support body, at least one second convex portion is disposed on the magnetic ring, and the second convex portion of the magnetic ring is disposed in the at least one accommodating groove of the sprocket support body.

7. The bicycle hub structure according to claim 6 , wherein when observing from a direction from the sprocket support body to the hub body, when the sprocket support body rotates in a counterclockwise direction relative to the hub body, the first convex portion of the sprocket support body pushes the second convex portion of the magnetic ring to rotate for a radial displacement, so that the sprocket support body changes from the first state to the second state.

8. The bicycle hub structure according to claim 7 , wherein a rotation direction of the sprocket support body is opposite to a rotation direction of the hub body.

9. The bicycle hub structure according to claim 6 , wherein when observing from a direction from the sprocket support body to the hub body, when the sprocket support body rotates in a clockwise direction relative to the hub body, the first convex portion of the sprocket support body pushes the second convex portion of the magnetic ring to rotate for a radial displacement, so that the sprocket support body changes from the second state to the first state.

10. The bicycle hub structure according to claim 9 , wherein a rotation direction of the sprocket support body is the same as a rotation direction of the hub body.

11. The bicycle hub structure according to claim 1 , wherein an assembly ring is disposed on the hub body, and a periphery of the assembly ring is connected with an inner periphery of the hub body.

12. The bicycle hub structure according to claim 11 , wherein the assembly ring comprises a first axial length, the first clutch ring comprises a second axial length, and the first axial length of the assembly ring is greater than the second axial length of the first clutch ring.

13. The bicycle hub structure according to claim 11 , wherein an internal tooth ring is disposed on the inner periphery of the sprocket support body, a plurality of splines are disposed on the second clutch ring, the plurality of splines engage the internal tooth ring to form the first torque transmission mechanism, a plurality of first ratchet teeth are disposed on an axial side of the first clutch ring facing the sprocket support body, a plurality of second ratchet teeth are disposed on an axial side of the second clutch ring facing the hub body, the plurality of first ratchet teeth engage the plurality of second ratchet teeth to form the second torque transmission mechanism, a plurality of external ratchet teeth are disposed on a periphery of the first clutch ring, a plurality of internal ratchet teeth are disposed on an inner periphery of the assembly ring, and the plurality of external ratchet teeth engage the plurality of internal ratchet teeth to form the third torque transmission mechanism.

14. The bicycle hub structure according to claim 13 , wherein the second clutch ring comprises a first ring body close to the first clutch ring and a second ring body close to the magnetic ring, the first ring body comprises an axial side facing the hub body, the second ring body comprises another axial side opposite to the axial side, and the plurality of splines are annularly disposed on radial peripheries of the first ring body and the second ring body.

15. The bicycle hub structure according to claim 14 , wherein the first magnets are disposed on the second ring body.

16. The bicycle hub structure according to claim 1 , wherein a sleeve is sleeved on a periphery of the hub axle, the first clutch ring, the second clutch ring and the magnetic ring are sleeved on the sleeve, and a friction element is disposed between the magnetic ring and the sleeve.

Assignees

• Tien Hsin Industries Co Ltd

Inventors

• Miles Jason

Classifications

• F16D41/36

  with clutching ring or disc axially shifted as a result of lost motion between actuating members · CPC title

• F16D27/01

  with permanent magnets · CPC title

• B60Y2200/13

  Bicycles; Tricycles · CPC title

• B60B2900/931

  Magnetic effects · CPC title

• B60B27/047 Primary

  comprising a freewheel mechanisms · CPC title