CN212737611U

CN212737611U - Ratchet wheel transmission bicycle hub using angular contact bearing

Info

Publication number: CN212737611U
Application number: CN202021290396.5U
Authority: CN
Inventors: 张泽霖
Original assignee: 张泽霖
Current assignee: Xiamen fangyuanleqi industry and Trade Co.,Ltd.
Priority date: 2020-07-03
Filing date: 2020-07-03
Publication date: 2021-03-19
Anticipated expiration: 2030-07-03

Abstract

The invention relates to a ratchet wheel transmission bicycle hub using an angular contact bearing, which comprises an axis, a hub and a tower footing, wherein the hub and the tower footing are sleeved on the axis; the first ratchet can only rotate circumferentially but cannot move axially, so that sliding friction force in occlusion is effectively reduced, and transmission efficiency is improved; by using the angular contact bearing, the bearing can better bear lateral angle force, and the bearing wettability and the friction service life in actual work are increased.

Description

Ratchet wheel transmission bicycle hub using angular contact bearing

[ technical field ] A method for producing a semiconductor device

The invention relates to the technical field of bicycle hubs, in particular to a ratchet wheel transmission bicycle hub using an angular contact bearing.

[ background of the invention ]

The transmission engagement of the existing bicycle hub is basically divided into two types. One is the traditional spring leaf which pushes the jack sheet to carry out occlusion; the other is a star-shaped ratchet structure, which is driven by the inner and outer springs pushing the inner and outer ratchets to engage with each other, as shown in US2019225014a1, and the structure cannot use an angular contact bearing due to the lateral movement and impact engagement of the two ratchets. Because the bicycle is not in a complete vertical state during traveling, but swings left and right, the bearing can bear lateral angle stress, and the smoothness and the service life of the deep groove ball bearing are influenced.

[ summary of the invention ]

In order to solve the problems, the invention provides the ratchet wheel transmission bicycle hub using the angular contact bearing, which can reduce the sliding friction force in engagement, increase the transmission efficiency, increase the bearing lubrication degree in actual work and prolong the friction service life.

In order to achieve the purpose, the invention provides the following technical scheme:

a ratchet wheel transmission bicycle hub using an angular contact bearing comprises an axle center, a hub and a tower footing, wherein the hub and the tower footing are sleeved on the axle center, one end, facing the tower footing, of the hub is provided with a first ratchet, one end, facing the hub, of the tower footing is provided with a second ratchet meshed with the first ratchet, the axle center is sleeved with a first bearing and a second bearing which are positioned in the hub, the hub and the axle center are movably connected through the first bearing and the second bearing, and the first bearing and the second bearing are both angular contact bearings; the first ratchet is only capable of circumferential rotation and is not capable of axial movement; and the shaft center is also sleeved with an elastic mechanism which is positioned in the tower footing and pushes the second ratchet to be meshed with the first ratchet.

As a preferred embodiment, further defined is: the contact angle of the angular contact bearing is 45 degrees +/-30 degrees.

As a preferred embodiment, further defined is: a first through hole for the axle center to pass through is formed in the hub, a first assembly cavity with the diameter larger than that of the first through hole is formed in one end, facing the tower footing, of the hub, a first ratchet part is formed at the front end of the first ratchet in a protruding mode, and a second ratchet part meshed with the first ratchet part is formed at the front end of the second ratchet in a protruding mode; a first threaded part is arranged at the side end of the first ratchet, a bearing accommodating cavity is arranged at the rear end of the first ratchet, and a second threaded part matched with the first threaded part is arranged on the cavity wall of the first assembly cavity; and after assembly, the first bearing is positioned in the bearing accommodating cavity.

As a preferred embodiment, further defined is: the first bearing comprises a first outer ring and a first inner ring, the outer surface A of the first outer ring is tightly matched with the cavity wall of the bearing accommodating cavity, and the inner side surface B of the first outer ring abuts against the cavity bottom of the first assembling cavity; and a limiting part is convexly formed in the middle of the axis, and the outer side surface C of the first inner ring abuts against the cavity bottom of the bearing accommodating cavity and the limiting part.

As a preferred embodiment, further defined is: the flower-drum deviates from the one end of tower footing is provided with the diameter and is greater than the second assembly chamber of first through-hole, still be provided with on the axle center and close the cap the first side cap in second assembly chamber, the second bearing includes second outer lane and second inner circle, the surface D of second outer lane with the chamber wall tight fit in second assembly chamber, the medial surface E of second outer lane supports on the chamber bottom in second assembly chamber, the lateral surface F of second inner circle supports on the first side cap.

As a preferred embodiment, further defined is: the tower footing is internally provided with a second through hole for the axle center to pass through, one end of the tower footing, facing the hub, is provided with internal teeth, and the side end of the second ratchet is provided with external teeth matched with the internal teeth.

As a preferred embodiment, further defined is: the elastic mechanism comprises a clamp spring sleeved on the shaft center and at least one jack piece clamped on the clamp spring, and a clamp spring groove which is located at the rear end of the internal tooth and used for containing the clamp spring is arranged in the tower base.

As a preferred embodiment, further defined is: the inner side wall of the tower footing is inwards protruded to form a first convex ring and a second convex ring, and the clamp spring groove is formed between the first convex ring and the second convex ring.

As a preferred embodiment, further defined is: and a third bearing and a fourth bearing which are positioned in the tower footing are sleeved on the shaft center.

As a preferred embodiment, further defined is: the flower-drum orientation the one end of column foot is provided with the diameter and is greater than first assembly chamber is located the sealed chamber in the first assembly chamber outside, the front end of column foot stretches into in the sealed chamber, the lateral surface of column foot is provided with the seal groove, be provided with the sealing washer in the seal groove.

The beneficial effects of the invention are as follows:

1. the first ratchet is only capable of rotating in the circumferential direction but not capable of moving in the axial direction, the second ratchet is meshed with the first ratchet 4 under the pushing of the elastic mechanism, and the sliding friction force in meshing is reduced and the transmission efficiency is improved by fixing the ratchet on one side.

2. The first bearing and the second bearing are both angular contact bearings, so that the bearing can better bear lateral angle force, and the bearing wettability and the friction service life in actual work are increased.

[ description of the drawings ]

FIG. 1 is a schematic structural diagram of the invention;

FIG. 2 is an exploded view of the present invention;

FIG. 3 is a cross-sectional view of the invention;

FIG. 4 is a schematic view of the first ratchet;

FIG. 5 is a schematic view of the second ratchet;

fig. 6 is a schematic structural view of the elastic mechanism.

[ detailed description ] embodiments

The invention is described in further detail below with reference to the following figures and detailed description:

as shown in fig. 1 and 2, the ratchet transmission bicycle hub using the angular contact bearing comprises a shaft center 1, a hub 2 and a tower footing 3, wherein the hub 2 and the tower footing 3 are sleeved on the shaft center 1, a first ratchet 4 is arranged at one end of the hub 2 facing the tower footing 3, a second ratchet 5 meshed with the first ratchet 4 is arranged at one end of the tower footing 3 facing the hub 2, a first bearing 6 and a second bearing 7 which are positioned in the hub 2 are sleeved on the shaft center 1, the hub 2 and the shaft center 1 are movably connected through the first bearing 6 and the second bearing 7, and the first ratchet 4 can only circumferentially rotate but cannot axially move. The shaft center 1 is sleeved with an elastic mechanism 8 which is positioned in the tower footing 3 and pushes the second ratchet 5 to be meshed with the first ratchet 4. The second ratchet is meshed with the first ratchet 4 under the pushing of the elastic mechanism 8, and the sliding friction force in occlusion is reduced and the transmission efficiency is increased by fixing the ratchet wheel on one side.

In the present embodiment, the first bearing 6 and the second bearing 7 are both angular contact bearings having a contact angle of 45 ° ± 30 °. The optimal angle is 15 degrees, and the bearing can better bear lateral angle force, so that the bearing wettability and the friction service life in actual work are increased.

In this embodiment, a first through hole 21 is provided in the hub 2 for the shaft center 1 to pass through, a first fitting cavity 22 having a diameter larger than that of the first through hole 21 is provided at one end of the hub 2 facing the tower base 3, a first ratchet portion 41 is formed at a front end of the first ratchet 4, and a second ratchet portion 51 engaged with the first ratchet portion 41 is formed at a front end of the second ratchet 5; a first threaded part 42 is arranged at the side end of the first ratchet 4, a bearing accommodating cavity 43 is arranged at the rear end of the first ratchet 4, and a second threaded part 23 matched with the first threaded part 42 is arranged on the cavity wall of the first assembling cavity 22; the first bearing 6 is located in the bearing receiving cavity 43 after assembly. The first ratchet 4 is axially fixed by means of a screw connection, and lateral forces are taken up by the first bearing 6.

More specifically, the first bearing 6 includes a first outer ring 61 and a first inner ring 62, an outer surface a of the first outer ring 61 is tightly fitted with a cavity wall of the bearing accommodating cavity 43, and an inner side surface B of the first outer ring 61 abuts against a cavity bottom of the first assembling cavity 22; the middle part of the axle center 1 is convexly provided with a limiting part 11, the outer side surface C of the first inner ring 62 is abutted against the cavity bottom of the bearing accommodating cavity 43 and the limiting part 11, the first bearing 6 is more firmly assembled through the structure, and the first bearing 6 is better contacted and stressed with the axle center 1, the hub 2 and the first ratchet 4.

In this embodiment, a second assembly cavity 24 with a diameter larger than that of the first through hole 21 is disposed at one end of the hub 2 away from the tower footing 3, a first side cover 12 capable of sealing the second assembly cavity 24 is further disposed on the axle center 1, and the first side cover 12 is in threaded connection with the axle center 1; the first side cover 12 can prevent dust from entering the hub. The second bearing 7 comprises a second outer ring 71 and a second inner ring 72, the outer surface D of the second outer ring 71 is tightly matched with the cavity wall of the second assembling cavity 24, the inner side surface E of the second outer ring 71 abuts against the cavity bottom of the second assembling cavity 24, and the outer side surface F of the second inner ring 72 abuts against the first side cover 12, so that the second bearing 7 is assembled more firmly through the structure, and the second bearing 7 is better contacted and stressed with the shaft center 1 and the first side cover 12.

In the embodiment, a second through hole 31 for the shaft center 1 to pass through is arranged in the tower base 3, inner teeth 32 distributed in an axial annular manner are arranged at one end of the tower base 3 facing the hub 2, and outer teeth 52 matched with the inner teeth 32 are arranged at the side end of the second ratchet 5; the internal teeth 32 and the external teeth 52 are straight teeth, and the second ratchet 5 can not only rotate in the circumferential direction but also move in the axial direction by the matching of the internal teeth 32 and the external teeth 52. The second ratchet 5 is pushed by the elastic mechanism 8 to move axially to be engaged with the first ratchet 4. Furthermore, the elastic mechanism 8 comprises a snap spring 81 sleeved on the shaft center 1 and at least one jack 82 clamped on the snap spring 81, a snap spring groove 33 is arranged in the tower base 3 and is located at the rear end of the internal tooth 32 and used for accommodating the snap spring 81, and the snap spring groove 33 plays a limiting role in the snap spring 81. In the present embodiment, three jack pieces 82 are provided in total, and the axial thrust is generated on the second ratchet 5 by the three jack pieces 82.

In this embodiment, the inner side wall of the tower foundation 3 protrudes inwards to form a first convex ring 34 and a second convex ring 35, and the clamp spring groove 33 is formed between the first convex ring 34 and the second convex ring 35, so that the structure is simple and the design is ingenious.

In this embodiment, the shaft core 1 is sleeved with a third bearing 9 and a fourth bearing 10 which are located in the tower base 3. Furthermore, the third bearing 9 is assembled at the rear end of the elastic mechanism 8, the fourth bearing 10 is assembled at one end of the tower footing 3 deviating from the hub 2, the second side cover 13 is further arranged on the shaft center 1, the second side cover 13 can prevent dust from entering the tower footing 3, and the outer side of the fourth bearing 10 abuts against the inner side of the second side cover 13. The second side cover 13 is connected with the axle center 1 by screws. Still the cover is equipped with and is located first sleeve 14 between third bearing 9 and the fourth bearing 10 on the axle center 1, plays limiting displacement to third bearing 9 and fourth bearing 10, prevents third bearing 9 and fourth bearing 10 axial displacement. In addition, still be equipped with second shaft sleeve 15 on the axle center 1, second shaft sleeve 15's one end is supported on spacing portion 11, and the other end supports the side of third bearing 9 plays limiting displacement to third bearing 9.

In this embodiment, the flower-drum 2 orientation the one end of column foot 3 is provided with the diameter and is greater than first assembly chamber 22 and is located the seal chamber 25 in the first assembly chamber 22 outside, the front end of column foot 3 stretches into in the seal chamber 25, the lateral surface of column foot 3 is provided with seal groove 36, be provided with sealing washer 37 in the seal groove 36, play sealed effect to the junction between flower-drum 2 and the column foot 3.

Claims

1. A ratchet wheel transmission bicycle hub using angular contact bearings comprises a shaft center (1), a hub (2) and a tower base (3) which are sleeved on the shaft center (1), wherein one end, facing the tower base (3), of the hub (2) is provided with a first ratchet (4), one end, facing the hub (2), of the tower base (3) is provided with a second ratchet (5) meshed with the first ratchet (4), the shaft center (1) is sleeved with a first bearing (6) and a second bearing (7) which are located in the hub (2), the hub (2) and the shaft center (1) are movably connected through the first bearing (6) and the second bearing (7), and the ratchet wheel transmission bicycle hub is characterized in that the first bearing (6) and the second bearing (7) are both angular contact bearings; the first ratchet (4) can only rotate circumferentially and cannot move axially; and the shaft center (1) is also sleeved with an elastic mechanism (8) which is positioned in the tower foundation (3) and pushes the second ratchet (5) to be meshed with the first ratchet (4).

2. The angular contact bearing for a ratchet driven bicycle hub according to claim 1, wherein the angular contact bearing has a contact angle of 45 ° ± 30 °.

3. The angular contact bearing used ratchet transmission bicycle hub according to claim 2, wherein a first through hole (21) for the shaft center (1) to pass through is arranged in the hub (2), a first assembly cavity (22) with a diameter larger than that of the first through hole (21) is arranged at one end of the hub (2) facing the tower base (3), a first ratchet part (41) is convexly formed at the front end of the first ratchet (4), and a second ratchet part (51) meshed with the first ratchet part (41) is convexly formed at the front end of the second ratchet (5); a first threaded part (42) is arranged at the side end of the first ratchet (4), a bearing accommodating cavity (43) is arranged at the rear end of the first ratchet (4), and a second threaded part (23) matched with the first threaded part (42) is arranged on the cavity wall of the first assembly cavity (22); after assembly, the first bearing (6) is positioned in the bearing accommodating cavity (43).

4. The ratchet transmission bicycle hub using angular contact bearings according to claim 3, wherein the first bearing (6) comprises a first outer ring (61) and a first inner ring (62), the outer surface A of the first outer ring (61) is tightly fitted with the cavity wall of the bearing accommodating cavity (43), and the inner side surface B of the first outer ring (61) abuts against the cavity bottom of the first assembling cavity (22); the middle of the shaft center (1) is convexly provided with a limiting part (11), and the outer side surface C of the first inner ring (62) is abutted against the cavity bottom of the bearing accommodating cavity (43) and the limiting part (11).

5. The angular contact bearing used ratchet transmission bicycle hub according to claim 3, wherein a second assembly cavity (24) with a diameter larger than that of the first through hole (21) is arranged at one end of the hub (2) away from the tower base (3), a first side cover (12) capable of covering the second assembly cavity (24) is further arranged on the shaft center (1), the second bearing (7) comprises a second outer ring (71) and a second inner ring (72), an outer surface D of the second outer ring (71) is tightly matched with a cavity wall of the second assembly cavity (24), an inner side surface E of the second outer ring (71) abuts against a cavity bottom of the second assembly cavity (24), and an outer side surface F of the second inner ring (72) abuts against the first side cover (12).

6. The angular contact bearing for a ratchet transmission bicycle hub according to any one of claims 1 to 5, wherein a second through hole (31) for the shaft center (1) to pass through is formed in the tower base (3), an inner tooth (32) is formed at one end of the tower base (3) facing the hub (2), and an outer tooth (52) matched with the inner tooth (32) is formed at the side end of the second ratchet (5).

7. The angular contact bearing used ratchet transmission bicycle hub according to claim 6, wherein the elastic mechanism (8) comprises a snap spring (81) sleeved on the shaft center (1) and at least one jack blade (82) clamped on the snap spring (81), and a snap spring groove (33) located at the rear end of the internal tooth (32) and used for accommodating the snap spring (81) is arranged in the tower base (3).

8. The angular contact bearing for a ratchet driven bicycle hub according to claim 7, wherein the inner sidewall of the tower base (3) is formed with a first protruding ring (34) and a second protruding ring (35) protruding inward, and the clamp spring groove (33) is formed between the first protruding ring (34) and the second protruding ring (35).

9. The angular contact bearing for a ratchet transmission bicycle hub according to claim 8, wherein the hub (1) is sleeved with a third bearing (9) and a fourth bearing (10) which are located in the tower base (3).

10. The angular contact bearing used ratchet transmission bicycle hub according to any one of claims 3 to 5, wherein a sealing cavity (25) which is larger in diameter than the first assembly cavity (22) and located outside the first assembly cavity (22) is arranged at one end of the hub (2) facing the tower base (3), the front end of the tower base (3) extends into the sealing cavity (25), a sealing groove (36) is arranged on the outer side face of the tower base (3), and a sealing ring (37) is arranged in the sealing groove (36).