TWI863216B - Bicycle rear hub structure - Google Patents

Abstract

The invention mainly provides a bicycle rear hub structure, which comprises: a hub, provided with a containing space, the inner wall of the containing space is ringed with a plurality of ratchets; a spindle, which is passed through the hub, the spindle is provided with a first section, a second section and a third section in sequence, a first bearing is provided between the containing space and the second section; a positioning ring set, comprising a first, a second and a third positioning ring, the first and second positioning rings are sleeved on the second section, the first and second positioning rings are abutted, and the other end of the first positioning ring is abutted against the first bearing, and the third positioning ring is sleeved on the third section, one end of the third positioning ring is abutted against the second section, and the third positioning ring is sleeved on the third section, one end of the third positioning ring is abutted against the second section, and the third bearing is abutted against the third section. A ratchet sleeve is provided with a pawl seat, and a second bearing is provided inside the pawl seat. One end of the ratchet sleeve is inserted into the accommodating space, and the spindle is also provided with a ratchet sleeve. The second positioning ring is located between the pawl seat and the second section, and one end of the second bearing is in contact with the third positioning ring. Through the above components, the multiple positioning rings and the two bearings are in contact with each other to produce rotation, and a loose fit is formed in the radial direction, which can compensate for the difference in concentricity between the hub, the spindle, the ratchet sleeve and the bearing, so that the hub rotates more smoothly. The components are simple, the production speed is fast and the cost is low, and it is indeed extremely innovative and convenient and practical.

Description

Bicycle rear hub structure

The present invention relates to a bicycle rear hub structure, and in particular to a positioning ring structure that can improve concentricity, which can compensate for the difference in concentricity between the hub, spindle, ratchet sleeve and bearing, making the hub rotate more smoothly, and has the effect of simple components.

A hub structure is provided between the rear wheel and the flywheel of the bicycle. The hub body has a ratchet design. A central shaft is passed through the hub body. A ratchet sleeve is sleeved on one side of the hub body. The ratchet sleeve is provided with a plurality of ratchet blocks around the circumference to cooperate with the ratchet of the hub body that is unidirectionally clamped to drive the hub body to produce synchronous rotation, so as to provide a driving effect for driving the rear wheel to rotate.

According to the prior art, the hub structure of a bicycle, such as the "Bicycle Hub Structure" disclosed in the domestic utility model patent No. 105214476, comprises: a hub with a hollow interior, one side of which has an opening whose inner diameter is larger than the inner diameter of the middle of the hub, a receiving groove is provided on the inner side of the opening and on the other side of the hub, a plurality of limiting slots are provided along the radial direction at the bottom end of the inner side of the opening so as to accommodate a plurality of compression springs, an inner thread section is provided around the intersection of the inner side of the opening and the receiving groove, and a positioning ring is provided near the outer edge of the opening; a rod-shaped hub is inserted into the center of the hub, and the two ends of the hub are provided with outer thread sections, A positioning ring is provided on one side and approximately in the middle. When a bearing is inserted from the two ends of the wheel center, the positioning rings will position the two bearings relatively inwardly in the receiving grooves provided at the inner end of the opening and the other side of the hub respectively. A hollow inner gear ring has an outer threaded pattern on its outer periphery so that The inner threaded section is locked and connected with the inner threaded section arranged at the junction of the inner side of the hub opening and the receiving groove, and a plurality of inner teeth are arranged around the inner periphery; a hollow outer tooth ring is mounted inside the inner tooth ring at the hub opening end, and a plurality of outer teeth are arranged around the outer periphery of the outer tooth ring to engage with the inner periphery of the inner tooth ring. The inner teeth arranged around the hub are matched, and the outer end surface is ringed with several ratchets; a positioning ring is sleeved on the wheel center of the hub opening, and the outer side of the bearing sleeved on the inner side of the hub opening is located; a sleeve with two ends passing through is sleeved on the hub opening, which includes: a sleeve body, two bearings, and a positioning sleeve; wherein, an extension tube body is arranged at the inner side end of the sleeve body, and a ratchet ring is arranged on the outer periphery of the extension tube body, and ratchets are arranged on the outer end surface of the ratchet ring; and the two bearings are separately arranged at the two ends inside the sleeve body, and in particular, the bearing inside the inner side end of the sleeve body is sleeved on the extension tube opening end; the positioning sleeve The positioning sleeve is used to separate the two bearings and maintain an appropriate distance; when the sleeve is sleeved on the wheel center from the opening end of the hub, the ratchet ring assembled on the outer periphery of the extension tube of the sleeve body, the ratchet set on the outer end face of the ratchet ring, cooperates with the elastic compression of the compression spring sleeved in the plurality of limiting slots at the bottom end of the inner side of the opening of the hub, so that the ratchet set on the outer end face of the outer gear ring cooperates with the ratchet set on the outer end face of the ratchet ring, and the outer gear ring can be driven to rotate in one direction; an oil seal is embedded on the edge of the positioning ring set near the outer edge of the opening of the hub; two nuts are matched with the external threaded sections set at the two ends of the wheel center.

In the above-mentioned structure, after the hub is inserted from one side of the hub, the two bearings are inserted from the two ends of the hub respectively, and the positioning ring edge provided on one side of the hub and approximately in the middle is used for positioning, so that the two bearings are respectively inserted into the receiving grooves provided on the inner side of the opening of the hub and the other side of the hub, and then the hub is provided to be inserted into the outer thread section of the other side of the opening of the hub and locked with the nut to prevent the bearing on that side from disengaging outward; then the outer gear ring, the positioning ring, and the sleeve are inserted from the opening end of the hub in sequence, and finally another nut is used to lock with the other outer thread section of the side of the hub to form the hub structure.

However, in the conventional hub structure, the two bearings are only connected by a locating ring. Due to the tolerance between the axle and the hub and between the ratchet sleeve and the bearing, there are differences in concentricity, which will affect the smoothness of the hub rotation. The overall structure needs to be improved.

The invention provides a bicycle rear hub structure, which comprises: a hub, one end of which is concavely provided with a receiving space, the inner wall of the receiving space is ringed with a plurality of ratchets; a spindle, which is passed through the hub, the outer circumference of the spindle is sequentially provided with a first section, a second section, and a third section, and each of the first, second, and third sections is stepped, the other end of the first section is connected to the inside of the hub, and a sleeve is provided between the receiving space and the second section. A first bearing; a positioning ring set, including a first positioning ring, a second positioning ring, and a third positioning ring, the first positioning ring and the second positioning ring are sleeved on the second section, the first positioning ring and the second positioning ring are mutually abutted, and the other end of the first positioning ring is mutually abutted with the first bearing, and the third positioning ring is sleeved on the third section, and one end of the third positioning ring is mutually abutted with the second positioning ring; a ratchet The sleeve has one end for sleeve connection with a flywheel assembly, and the other end of the ratchet sleeve is provided with a pawl seat corresponding to the ratchet, and the pawl seat is provided with a plurality of pawls around the circumference, and a second bearing is sleeved inside the pawl seat, and one end of the ratchet sleeve is inserted into the accommodating space so that each pawl and the ratchet engage with each other, and the spindle is also inserted into the ratchet sleeve, and the other end of the third section is also assembled with the ratchet sleeve, and the second positioning ring is located between the pawl seat and The second section, and one end of the second bearing abuts against the third positioning ring; through the above components, the multiple positioning rings and the two bearings abut against each other to produce rotation, forming a loose fit in the radial direction, and the gap between them can be used to compensate for the difference in concentricity between the hub, the spindle, the ratchet sleeve and the bearing, so that the hub rotates more smoothly. Its components are simple, the production speed is fast and the cost is low, and it is indeed extremely innovative and convenient and practical.

The bicycle rear hub structure of the present invention is provided with a positioning ring set between the hub and the ratchet sleeve. The positioning ring set is provided with a first, a second, and a third positioning ring that abut against each other on the axle sleeve. The other end of the first positioning ring abuts against the first bearing in the hub, and the other end of the third positioning ring abuts against the second bearing in the ratchet sleeve. The three positioning rings abut against the two axles. The bearings are in contact with each other to rotate, and a loose fit is formed in the radial direction. The gap between them can be used to compensate for the difference in concentricity between the hub, the spindle, the ratchet sleeve and the bearing, so that the hub can rotate more smoothly. The components are simple, the production speed is fast and the cost is low, so it has excellent practicality and convenience. Furthermore, the second positioning ring is designed to cooperate with the extension section at one end, so that A gap is provided between the outer surface of the second positioning ring and the inner surface of the hub and ratchet sleeve to compensate for the concentricity differences between the hub, spindle, ratchet sleeve and bearing, so that the hub can rotate more smoothly. The second and third sections of the spindle are designed so that the outer diameter of the second section is greater than the outer diameter of the third section, which can increase the strength between the hub and the ratchet sleeve. The outer periphery of the spindle is The stepped design has a larger outer diameter of the second section to enhance the lateral strength; the second positioning ring can be made of copper or plastic to enhance the smoothness of rotation and lightness; the first and third positioning rings can be made of steel, aluminum or copper, etc., with the same steel properties, to enhance the smoothness and stability of rotation.

[The present invention]

D1: Outer diameter

D2: Outer diameter

H: Gap

10:Hub

11: Storage space

12: Thorns

13: First bearing

20: Axis

21: First paragraph

22: Second paragraph

23: The third paragraph

24:Blocking edge

25: Class

30: Positioning ring set

31: First positioning ring

32: Second positioning ring

321: Extension section

33: Third positioning ring

40: Ratchet socket

41: Ratchet seat

42: Ratchet

43: Second bearing

Figure 1 is a three-dimensional external view of a preferred embodiment of the present invention.

Figure 2 is a three-dimensional exploded view of a preferred embodiment of the present invention.

Figure 3 is a combined cross-sectional view of a preferred embodiment of the present invention.

Figure 4 is an enlarged cross-sectional view of a preferred embodiment of the present invention.

Figure 5 is a second enlarged cross-sectional view of a preferred embodiment of the present invention.

First, please refer to Figures 1 to 5. The bicycle rear hub structure provided by the present invention mainly includes: a hub 10, a spindle 20, a positioning ring assembly 30, and a ratchet sleeve 40.

The hub 10 has a recessed receiving space 11 at one end, and a plurality of ratchets 12 are arranged around the inner wall of the receiving space 11.

A central shaft 20 is inserted into the hub 10. The outer circumference of the central shaft 20 is provided with a first section 21, a second section 22, and a third section 23 in sequence, and the first, second, and third sections 21, 22, 23 are stepped. The first section 21 is connected to the inside of the hub 10 at one end. The outer diameter of the second section 22 is D1, and the outer diameter of the third section 23 is D2, and D1>D2. A baffle 24 is formed between the first section 21 and the second section 22, and a stepped edge 25 is formed between the second section 22 and the third section 23. A first bearing 13 is sleeved between the accommodating space 11 of the hub 10 and the second section 22, and one end of the first bearing 13 abuts against the baffle 24.

The positioning ring assembly 30 includes a first positioning ring 31, a second positioning ring 32, and a third positioning ring 33. The first positioning ring 31 and the third positioning ring 33 are in a ring shape. The second positioning ring 32 is slightly sleeve-shaped and has a preset height. One end of the second positioning ring 32 extends and is radially inwardly contracted and axially formed with an extension section 321. The first positioning ring 31 and the second positioning ring 32 are sleeved on the second section 22, and one end of the first positioning ring 31 is remote from the first bearing 13. One end of the stopper 24 abuts against each other, so that one end of the first positioning ring 31 away from the first bearing 13 abuts against one end of the second positioning ring 32, and the extension section 321 of the other end of the second positioning ring 32 is sleeved on the third section 23, and the third positioning ring 33 is sleeved on the third section 23, and one end of the third positioning ring 33 abuts against the extension section 321; wherein, the second positioning ring 32 can be applied with copper or plastic materials, which can improve the smoothness of rotation and the effect of light weight.

The ratchet sleeve 40 has one end that is sleeved with a flywheel assembly to drive the ratchet sleeve to rotate synchronously. The other end of the ratchet sleeve 40 is provided with a pawl seat 41 corresponding to the ratchet tooth 12. The pawl seat 41 is provided with a plurality of pawls 42 around its periphery. A second bearing 43 is sleeved inside the pawl seat 41. One end of the ratchet sleeve 40 is inserted into the accommodating space 11 so that each pawl 42 and the ratchet tooth 12 are engaged with each other. The spindle 20 is also provided with a ratchet sleeve 41. 0, the second section 22 and the third section 23 are inserted into the ratchet sleeve 40, the other end of the third section 23 is assembled with the ratchet sleeve 40, the second positioning ring 32 is located between the pawl seat 41 and the second section 22, the second bearing 43 is sleeved on the third section 23, and one end of the second bearing 43 abuts against the third positioning ring 33, and a gap H is provided between the outer annular surface of the second positioning ring 32 and the inner annular surface of the hub 10 and the ratchet sleeve 40, forming a rear hub structure.

By means of the above-mentioned components, a positioning ring assembly 30 is provided between the hub 10 and the ratchet sleeve 40. The positioning ring assembly 30 is provided with first, second and third positioning rings 31, 32 and 33 which abut against each other on the spindle 20. The other end of the first positioning ring 31 abuts against the first bearing 13 in the hub 10, and the other end of the third positioning ring 33 abuts against the second bearing 13 in the ratchet sleeve 40. The bearings 43 abut against each other, and the three positioning rings and the two bearings abut against each other to produce rotation, forming a loose fit in the radial direction. The gap between them can be used to compensate for the difference in concentricity between the hub 10, the spindle 20, the ratchet sleeve 40 and the bearings, so that the hub 10 can rotate more smoothly. Its components are simple, the production speed is fast and the cost is low, so the overall structure is extremely innovative and practical.

In order to further understand the structural features, applied technical means and expected effects of the present invention, the use of the present invention is described as follows:

The assembly of the present invention is to insert the spindle 20 into the hub 10, so that one end of the first bearing 13 abuts against the baffle 24, then insert the first, second, and third positioning rings 31, 32, and 33 into the spindle 20 in sequence, so that the first positioning ring 31 abuts against the first bearing 13, and then insert the ratchet sleeve 40 into the accommodating space 11, so that the second positioning ring 32 is arranged between the spindle 20 and the pawl seat 41, the extension section 321 abuts against the third positioning ring 33, and the other end of the third positioning ring 33 abuts against the second bearing 43, and the assembly is completed.

The bicycle rear hub structure of the present invention is provided with a positioning ring set 30 between the hub 10 and the ratchet sleeve 40. The positioning ring set 30 is sleeved with a first, a second, and a third positioning ring 31, 32, and 33 on the spindle 20, and the other end of the first positioning ring 31 is in contact with the first bearing 13 in the hub 10, and the other end of the third positioning ring 33 is in contact with the second bearing 43 in the ratchet sleeve 40. The three positioning rings and the two bearings are in contact with each other to produce rotation, and a loose fit is formed in the radial direction, and the gaps between them can be used to compensate for the respective The difference in concentricity between the hub 10, the spindle 20, the ratchet sleeve 40 and the bearing makes the hub 10 rotate more smoothly. The components are simple, the production speed is fast and the cost is low, so it is extremely practical and convenient. In addition, the second positioning ring 32 is designed to match the extension section 321 at one end, and a gap H is provided between the outer annular surface of the second positioning ring 32 and the inner annular surface of the hub 10 and the ratchet sleeve 40, which can compensate for the difference in concentricity between the hub 10, the spindle 20, the ratchet sleeve 40 and the bearing, so that the hub 10 rotates more smoothly.

The second section 22 and the third section 23 of the spindle 20 are designed such that the outer diameter D1 of the second section 22 is greater than the outer diameter D2 of the third section 23, which can increase the strength between the hub 10 and the ratchet sleeve 40; the outer periphery of the spindle 20 is designed in a stepped shape, and the outer diameter of the second section 22 is larger, so as to achieve the effect of improving the lateral strength.

The second positioning ring 32 can be made of copper or plastic material, which can improve the smoothness of rotation and the effect of light weight; the first positioning ring 31 and the third positioning ring 33 can be made of steel, aluminum or copper and other materials, which have the same steel properties and can improve the smoothness and stability of rotation.

In summary, the "bicycle rear hub structure" disclosed in the present invention provides a positioning structure with a positioning ring set 30. The positioning ring set 30 is disposed between the hub 10 and the ratchet sleeve 40. The positioning ring set 30 is sleeved with a plurality of mutually abutting positioning rings on the spindle 20. The plurality of positioning rings and the two bearings are mutually abutted and matched to generate rotation, and a loose fit is formed in the radial direction. The gap can be used to compensate for the difference in concentricity between the hub 10, the spindle 20, the ratchet sleeve 40 and the bearing, so that the hub 10 can rotate more smoothly. Its components are simple, the production speed is fast and the cost is low, so that the whole has industrial practicality and innovative benefits. Moreover, its structure has never been seen in books or public use. It truly meets the requirements for invention patent application. We sincerely request the Bureau of Justice to examine it and grant the patent as soon as possible. We are very grateful.

It should be noted that the above is a specific embodiment of the present invention and the technical principles used. If the changes made according to the concept of the present invention still do not exceed the spirit covered by the instructions and drawings, they should be stated within the scope of the present invention.

10:Hub

11: Storage space

12: Thorns

13: First bearing

20: Axis

21: First paragraph

22: Second paragraph

23: The third paragraph

24:Blocking edge

25: Class

30: Positioning ring set

31: First positioning ring

32: Second positioning ring

321: Extension section

33: Third positioning ring

40: Ratchet socket

41: Ratchet seat

42: Paw

Claims (6)

A bicycle rear hub structure comprises: a hub, one end of which is concavely provided with a receiving space, the inner wall of the receiving space is ring-shaped with a plurality of ratchets; a spindle is inserted into the hub, the outer circumference of the spindle is sequentially provided with a first section, a second section, and a third section, and each of the first, second, and third sections is stepped, the other end of the first section is connected to the inside of the hub, and a first bearing is sleeved between the receiving space and the second section; a positioning ring set comprises a first positioning ring, a second positioning ring, and a third positioning ring, the first positioning ring and the third positioning ring are ring-shaped, the second positioning ring is slightly sleeve-shaped and has a preset height, the first positioning ring and the second positioning ring are sleeved on the second section, the first positioning ring and the third positioning ring are sleeved on the second section, and the first positioning ring and the third positioning ring are sleeved on the second section. The second positioning rings are mutually abutted, and the other end of the first positioning ring is mutually abutted with the first bearing, and the third positioning ring is sleeved on the third section, and one end of the third positioning ring is mutually abutted with the second positioning ring; a ratchet sleeve, one end of which is sleeved with a flywheel assembly, and the other end of the ratchet sleeve is provided with a pawl seat corresponding to the ratchet, and the pawl seat is provided with a plurality of pawls around the circumference, and a second bearing is sleeved inside the pawl seat, and one end of the ratchet sleeve is inserted into the accommodating space so that each pawl and the ratchet are engaged with each other, and the spindle is also penetrated by the ratchet sleeve, and the other end of the third section is assembled with the ratchet sleeve, and the second positioning ring is located between the pawl seat and the second section, and one end of the second bearing is mutually abutted with the third positioning ring. The bicycle rear hub structure as described in claim 1, wherein the outer diameter of the second section of the axle is larger than the outer diameter of the third section, a baffle is formed between the first section and the second section, a step is formed between the second section and the third section, and one end of the first bearing abuts against the baffle. As described in claim 2, the bicycle rear hub structure, wherein one end of the second positioning ring extends and is radially inwardly contracted to form an extension section in the axial direction, the first positioning ring and the second positioning ring are sleeved on the second section, and one end of the first positioning ring and one end of the first bearing away from the baffle are mutually abutted, so that one end of the first positioning ring away from the first bearing and one end of the second positioning ring are mutually abutted, and the extension section of the other end of the second positioning ring is sleeved on the third section, and the third positioning ring is sleeved on the third section, and one end of the third positioning ring and the extension section are mutually abutted. The bicycle rear hub structure as described in claim 1, wherein the second positioning ring is made of copper. The bicycle rear hub structure as described in claim 1, wherein the second positioning ring is applied with a plastic material. As described in claim 1, the rear hub structure of a bicycle, wherein one end of the ratchet sleeve is provided for sleeve connection with a flywheel assembly to drive the ratchet sleeve to rotate synchronously, the other end of the ratchet sleeve is provided with a pawl seat corresponding to the ratchet tooth, the pawl seat is provided with a plurality of pawls around the circumference, and the second bearing is sleeved inside the pawl seat, one end of the ratchet sleeve is inserted into the accommodating space so that each pawl and the ratchet tooth are engaged with each other, the spindle is also inserted into the ratchet sleeve, the second section and the third section are inserted into the ratchet sleeve, the other end of the third section is also assembled with the ratchet sleeve, the second positioning ring is located between the pawl seat and the second section, and one end of the second bearing is mutually abutted with the third positioning ring.

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