CN215826384U - Novel bicycle rear hub with ratchet structure - Google Patents
Novel bicycle rear hub with ratchet structure Download PDFInfo
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- CN215826384U CN215826384U CN202122026850.7U CN202122026850U CN215826384U CN 215826384 U CN215826384 U CN 215826384U CN 202122026850 U CN202122026850 U CN 202122026850U CN 215826384 U CN215826384 U CN 215826384U
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- ratchet wheel
- ratchet
- bearing
- hub shell
- tower
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Abstract
The utility model discloses a bicycle rear hub with a novel ratchet structure, which comprises an axle center, a hub shell, a tower footing, a transmission structure, a left side cover and a right side cover, wherein the axle center extends along the left and right directions, and the hub shell and the tower footing are in transmission connection through the transmission structure; the transmission structure comprises a first ratchet wheel, a second ratchet wheel and an elastic piece, the first ratchet wheel is sleeved on the shaft center and is positioned on one side, facing the tower footing, of the interior of the hub shell, and the first ratchet wheel is abutted to the first bearing; the second ratchet wheel and the elastic piece are sleeved on the shaft center and located on one side, facing the hub shell, of the inside of the tower base, two ends of the elastic piece are respectively abutted to the second ratchet wheel and the second bearing, and the elastic piece pushes the second ratchet wheel to move in the left-right direction so as to enable the first ratchet wheel and the second ratchet wheel to be meshed or separated. The utility model enables the bearings in the hub shell to be closer to two sides of the axle center, the bearing is stressed more uniformly, the durability of the bearings and the axle center is improved, the friction force is reduced, and the transmission efficiency is improved.
Description
Technical Field
The utility model relates to the technical field of bicycle hubs, in particular to a bicycle rear hub with a novel ratchet structure.
Background
At present, with the understanding and attention of people to environmental protection, the bicycle becomes a new generation of energy-saving and environment-friendly vehicle due to multiple advantages of lightness, time saving, labor saving, economy, no pollution to the atmosphere and the like, and is generally favored by people, and the bicycle transmission component is an important part of the bicycle hub and directly influences the transmission efficiency and the service life of the bicycle.
In the prior art, the transmission mode of a commonly used bicycle hub is that a ratchet structure is adopted between a hub shell and a tower footing for transmission connection, specifically, the hub shell and the tower footing are respectively erected on a shaft center through a bearing, a tower spring and a first ratchet wheel are arranged on one side of the hub shell, a second ratchet wheel is arranged on one side of the tower footing, the first ratchet wheel and the second ratchet wheel are driven to be meshed through the tower spring, and the hub shell and the tower footing are in transmission connection.
This mechanism has the following drawbacks:
firstly, the length of a first ratchet wheel on one side of the hub shell is longer, and a second ratchet wheel is positioned outside the tower footing, so that a bearing on one side of the tower footing inside the hub shell is closer to the central point of the axis, when the bearing is subjected to pressure or impact, stress is excessively concentrated to the center of the axis, the axis is easier to deform, and the durability is reduced;
secondly, set up the lateral shifting that tower spring drove first ratchet on flower-drum casing one side, receive the influence of tower spring for the flower-drum casing can only adopt deep groove ball bearing cover to locate on the axle center, and it is less that unable adoption friction system, the higher angular contact bearing of transmission efficiency makes the coefficient of friction of whole flower-drum casing and axle center bigger, and whole transmission efficiency is lower.
In view of the above, the present inventors have developed and designed a structure that makes bearings inside a hub housing closer to both sides of an axis, so that the bearings are more uniformly stressed, durability of the bearings and the axis is improved, friction is reduced, and overall transmission efficiency is improved, thereby producing the present invention.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a bicycle rear hub with a novel ratchet structure, so that bearings in a hub shell are closer to two sides, the bearing is stressed more uniformly, the durability of the bearings and an axis is improved, the friction is reduced, and the transmission efficiency is improved.
In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:
a bicycle rear hub with a novel ratchet structure comprises an axle center, a hub shell, a tower footing, a transmission structure, a left side cover and a right side cover, wherein the axle center extends along the left and right directions, the left and right end parts of the axle center are respectively connected with the left side cover and the right side cover, the two ends of the hub shell are respectively movably sleeved on the axle center through a first bearing, the two ends of the tower footing are respectively movably sleeved on the axle center through a second bearing, and the hub shell and the tower footing are in transmission connection through the transmission structure;
the transmission structure comprises a first ratchet wheel, a second ratchet wheel and an elastic piece, the first ratchet wheel is sleeved on the shaft center and is positioned on one side, facing the tower footing, of the interior of the hub shell, and the first ratchet wheel is abutted to the first bearing; the second ratchet wheel and the elastic piece are sleeved on the shaft center and located on one side, facing the hub shell, of the inside of the tower base, two ends of the elastic piece are respectively abutted to the second ratchet wheel and the second bearing, and the elastic piece pushes the second ratchet wheel to move in the left-right direction so as to enable the first ratchet wheel and the second ratchet wheel to be meshed or separated.
Furthermore, one end of the first ratchet wheel is convexly provided with a first ratchet part, and one end of the second ratchet wheel is convexly provided with a second ratchet part meshed with the first ratchet part.
Furthermore, a first bearing containing cavity and a first inner gear ring are arranged at the end part of the hub shell facing one side of the tower footing from left to right, a first outer gear is arranged outside the first ratchet wheel, the first bearing is located in the first bearing containing cavity, and the first outer gear is clamped with the first inner gear ring so that the hub shell is fixedly connected with the first ratchet wheel.
Furthermore, a second inner gear ring and a second bearing accommodating cavity are arranged at the end part of the tower footing, facing one side of the hub shell, from left to right, a second outer gear is arranged outside the second ratchet wheel, the second bearing is located in the second bearing accommodating cavity, and the second outer gear is clamped with the second inner gear ring so that the tower footing is fixedly connected with the second ratchet wheel.
Furthermore, the elastic part is a tower spring, an elastic part accommodating cavity is arranged between the second inner gear ring and the second bearing accommodating cavity, and the elastic part is arranged in the elastic part accommodating cavity.
Further, the number of teeth of the first ratchet wheel and the second ratchet wheel ranges from 10 teeth to 180 teeth.
Further, the angle range of the tooth bevel angles of the first ratchet wheel and the second ratchet wheel is between 5 degrees and 60 degrees.
Further, the first bearing is an angular contact bearing or a deep groove ball bearing.
After the scheme is adopted, the utility model has the following technical effects:
firstly, the first ratchet wheel on one side of the hub shell is smaller in size, and the elastic piece is positioned on one side of the tower footing to drive the second ratchet wheel on the side of the tower footing to move, so that the bearing on one side, close to the tower footing, inside the hub shell is closer to the outer side of the axle center, the stress is more uniform, the bearing and the axle center are not easy to deform, and the durability of the transmission assembly is improved;
secondly, the elastic piece and the second ratchet wheel are arranged on one side of the tower base, the second ratchet wheel is pushed to move towards one side of the hub shell, the hub shell can only rotate in the circumferential direction and cannot move in the axial direction, and an angular contact bearing can be adopted between the hub shell and the axis, so that the friction coefficient between the hub shell and the axis is lower, and the overall transmission efficiency is higher.
The utility model is described in further detail below with reference to the figures and the specific embodiments.
Drawings
FIG. 1 is a perspective view of the rear hub construction of the present invention;
FIG. 2 is a front elevational view of the rear hub structure of the present invention;
FIG. 3 is a cross-sectional view of the rear hub construction of the present invention;
FIG. 4 is an exploded view of the rear hub construction of the present invention;
FIG. 5 is a schematic view of a first ratchet of the present invention;
FIG. 6 is a schematic structural view of a second ratchet wheel of the present invention;
FIG. 7 is a schematic structural view of the hub shell of the present invention;
FIG. 8 is a schematic view of the structure of the foundation of the present invention.
Description of reference numerals:
an axis 1;
the hub shell 2, the first bearing accommodating cavity 21 and the first inner gear ring 22;
the tower footing 3, the second inner gear ring 31, the elastic part accommodating cavity 32 and the second bearing accommodating cavity 33;
the transmission structure 4, the first ratchet wheel 41, the first ratchet part 411, the first external gear 412, the second ratchet wheel 42, the second ratchet part 421, the second external gear 422 and the elastic element 43;
the left side cover 5, the right side cover 6, a first bearing 7 and a second bearing 8.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "top", "bottom", "side", "center", "vertical", "horizontal", "inside", "outside", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Referring to fig. 1 to 8, the bicycle rear hub with a novel ratchet structure disclosed by the utility model comprises an axle center 1, a hub shell 2, a tower footing 3, a transmission structure 4, a left side cover 5 and a right side cover 6, wherein the axle center 1 extends along the left-right direction, the left end part of the axle center 1 is connected with the left side cover 5, and the right end part of the axle center is connected with the right side cover 6. Two ends of the hub shell 2 are movably sleeved on the axle center 1 through first bearings 7 respectively, two ends of the tower footing 3 are movably sleeved on the axle center 1 through second bearings 8 respectively, and the hub shell 2 and the tower footing 3 are in transmission connection through a transmission structure 4; the transmission structure 4 comprises a first ratchet wheel 41, a second ratchet wheel 42 and an elastic element 43, the first ratchet wheel 41 is sleeved on the axis 1 and is positioned on one side of the interior of the hub shell 2 facing the tower footing 3, and the first ratchet wheel 41 is abutted with the first bearing 7; the second ratchet wheel 42 and the elastic element 43 are sleeved on the shaft center 1 and located on one side of the inside of the tower base 3 facing the hub shell 2, two ends of the elastic element 43 are respectively abutted against the second ratchet wheel 42 and the second bearing 8, and the elastic element 43 pushes the second ratchet wheel 42 to move along the left-right direction, so that the first ratchet wheel 41 is engaged with or disengaged from the second ratchet wheel 42. When the first ratchet wheel 41 is meshed with the second ratchet wheel 42, the hub shell 2 is connected with the tower footing 3, and the tower footing 3 is driven to drive the hub shell 2 to synchronously rotate by stepping on a pedal by a riding vehicle so as to realize the forward movement of the vehicle; when the first ratchet wheel 41 and the second ratchet wheel 42 are separated, the hub shell 2 is not connected with the tower footing 3 at the moment, and the vehicle is stopped. According to the utility model, the elastic piece 43 and the second ratchet wheel 42 are arranged on one side of the tower footing 3, and only the first ratchet wheel 41 with smaller volume is arranged on one side of the hub shell 2, so that the first bearing 7 in one side of the hub shell 2 is closer to the outer side of the axle center 1, the stress of the first bearing 7 is more uniform, the deformation of the first bearing 7 is small, the rotation of the first bearing 7 is smooth, and the durability of the bearing and the axle center 1 is higher; meanwhile, the elastic piece 43 drives the first ratchet wheel 41 and the second ratchet wheel 42 to be meshed, the tower footing 3 moves laterally relative to the hub shell 2, the hub shell 2 does not slide, the first bearing 7 can adopt an angular contact bearing, a friction system of the angular contact bearing has a lower friction coefficient than a deep groove ball bearing used in the prior art, and the whole transmission efficiency is higher.
Specifically, referring to fig. 4 to 5, one end of the first ratchet wheel 41 is protruded to form a first ratchet part 411, and a first external gear 412 is disposed at the side end of the first ratchet wheel 41; one end of the second ratchet wheel 42 is convexly provided with a second ratchet part 421 meshed with the first ratchet part 411, a second external gear 422 is arranged outside the second ratchet wheel 42, when a rider steps on a pedal, the first ratchet part 411 is meshed with the second ratchet part 421 to drive the same-direction rotation to enable the hub shell 2 and the tower footing 3 to synchronously transmit, and then the bicycle advances; when the rider stops operating or pedals in the reverse direction, the second ratchet portion 421 rotates in the reverse direction with respect to the first ratchet portion 411, the first ratchet portion 411 disengages from the second ratchet portion 421, the tower base 3 is disconnected from the hub shell 2, and the bicycle stops. The number of teeth of the first ratchet portion 411 of the first ratchet wheel 41 and the second ratchet portion 421 of the second ratchet wheel 42 is in the range of 10 teeth to 180 teeth, and the optimal gear of the present embodiment is 36 teeth, which facilitates the transmission of the two. The angle of the oblique angle of the teeth of the first ratchet portion 411 and the second ratchet portion 421 is in the range of 5 to 60 degrees, and the optimal angle of the present embodiment is 10 degrees, thereby reducing the friction force in the engagement and increasing the transmission efficiency.
Referring to fig. 7, for convenience of assembly, a first through hole is formed in the middle of the hub shell 2 for the shaft center 1 to pass through, and first bearings 7 are respectively arranged on the shaft center 1 and at the left and right ends inside the hub shell 2; the end part of the hub shell 2 facing the tower footing 3 is provided with a first bearing accommodating cavity 21 and a first inner gear ring 22 from left to right, a first bearing 7 is positioned in the first bearing accommodating cavity 21, and the first outer gear 412 is clamped with the first inner gear ring 22 so that the hub shell 3 is fixedly connected with the first ratchet wheel 41. In this embodiment, the first ratchet 41 is a ratchet piece with a smaller volume, so that the first bearing can be closer to the outer side of the shaft center 1. The end part of one side far away from the tower base 3 is provided with a first groove (not shown in the figure), and the other first bearing 7 is clamped in the first groove. The left end portion of axle center 1 is located to left side lid 5, and the inside of hub shell 2 is located to the right side card of left side lid 5, and left side lid 5 supports and leans on in left first bearing 7. In other embodiments, the connection manner of the first bearing 7 and the hub casing 2, and the connection manner of the left side cover 5 and the hub casing 2 are not limited thereto. In the embodiment, the first bearing 7 adopts an angular contact bearing, the friction force of the angular contact bearing is small, and the transmission efficiency is higher. Of course, in other embodiments, the first bearing 7 may be a deep groove ball bearing with higher friction and relatively lower transmission efficiency.
Referring to fig. 8, for convenience of assembly, a second through hole is formed in the middle of the tower foundation 3 for the shaft center 1 to pass through, and second bearings 8 are respectively arranged on the shaft center 1 and on the left side and the right side inside the tower foundation 3; the end part of the tower footing 3 facing one side of the hub shell 2 is provided with a second bearing accommodating cavity 33 and a second inner gear ring 31 from left to right, a second bearing 8 is positioned in the second bearing accommodating cavity 33, and the second outer gear 422 is clamped with the second inner gear ring 31 so as to fixedly connect the tower footing 3 with the second ratchet wheel 42. The end of the tower footing 3 far away from the side of the hub shell 2 is provided with a second groove (not shown in the figure), and the other second bearing 8 is clamped in the second groove. The left side card of right side lid 6 is located the inside of column foot 3, and right side lid 6 supports and leans on in the second bearing 8 on right side. Of course, in other embodiments, the connection manner of the second bearing 8 and the tower foundation 3 and the connection manner of the right side cover 6 and the tower foundation 3 are not limited to this. In order to facilitate the contraction of the elastic members, an elastic member accommodating chamber 32 is provided between the second ring gear 31 and the second bearing accommodating chamber 33, and an elastic member 43 is provided in the elastic member accommodating chamber 32. In this embodiment, the elastic member 43 can be a tower spring to facilitate the lateral movement of the second ratchet 42, and in other embodiments, the elastic member 43 can be made of other elastic materials, which are not listed herein.
In this embodiment, the first state (initial state) of the hub is the first state when the rider steps on the pedal to drive the tower base 3 to rotate clockwise, and the second state of the hub is the second state when the tower base 3 stops or rotates counterclockwise. In other applications, the first state and the second state may be interchanged.
When a rider steps on the pedal, the tower footing 3 is driven to rotate clockwise, the second ratchet wheel 42 correspondingly rotates clockwise, at the moment, under the action of the elastic force of the elastic piece 43, the second ratchet wheel 42 is meshed with the first ratchet wheel 41 to drive the hub shell 1 to synchronously rotate clockwise, and finally, the wheels are driven to rotate clockwise, so that the bicycle advances;
when the riding vehicle stops operating or pedals are pedaled in the anticlockwise direction, the tower footing 3 rotates anticlockwise relative to the hub shell 2, the second ratchet wheel 42 also rotates anticlockwise relative to the first ratchet wheel 41, so that the second ratchet wheel 42 is separated from the first ratchet wheel 41, and finally the transmission connection between the tower footing 3 and the hub shell 2 is disconnected, and the bicycle stops advancing.
The above description is only a preferred embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modifications made by using the design concept should fall within the scope of infringing on the protection scope of the present invention.
Claims (8)
1. The utility model provides a novel bicycle rear hub of ratchet structure which characterized in that: the tower foundation structure comprises an axis, a hub shell, a tower foundation, a transmission structure, a left side cover and a right side cover, wherein the axis extends along the left and right directions, the left and right ends of the axis are respectively connected with the left side cover and the right side cover, the two ends of the hub shell are respectively movably sleeved on the axis through first bearings, the two ends of the tower foundation are respectively movably sleeved on the axis through second bearings, and the hub shell and the tower foundation are in transmission connection through the transmission structure;
the transmission structure comprises a first ratchet wheel, a second ratchet wheel and an elastic piece, the first ratchet wheel is sleeved on the shaft center and is positioned on one side, facing the tower footing, of the interior of the hub shell, and the first ratchet wheel is abutted to the first bearing; the second ratchet wheel and the elastic piece are sleeved on the shaft center and located on one side, facing the hub shell, of the inside of the tower base, two ends of the elastic piece are respectively abutted to the second ratchet wheel and the second bearing, and the elastic piece pushes the second ratchet wheel to move in the left-right direction so as to enable the first ratchet wheel and the second ratchet wheel to be meshed or separated.
2. The novel bicycle rear hub with a ratchet structure as claimed in claim 1, wherein: one end of the first ratchet wheel is convexly provided with a first ratchet tooth part, and one end of the second ratchet wheel is convexly provided with a second ratchet tooth part meshed with the first ratchet tooth part.
3. The novel bicycle rear hub with a ratchet structure as claimed in claim 1, wherein: the end part of the hub shell, which faces one side of the tower footing, is provided with a first bearing accommodating cavity and a first inner gear ring from left to right, the side end of the first ratchet wheel is provided with a first outer gear, the first bearing is located in the first bearing accommodating cavity, and the first outer gear is clamped with the first inner gear ring so that the hub shell is fixedly connected with the first ratchet wheel.
4. The novel bicycle rear hub with a ratchet structure as claimed in claim 1, wherein: the end part of the tower footing, which faces one side of the hub shell, is provided with a second inner gear ring and a second bearing accommodating cavity from left to right, the side end of a second ratchet wheel is provided with a second external gear, the second bearing is positioned in the second bearing accommodating cavity, and the second external gear is clamped with the second inner gear ring so as to fixedly connect the tower footing with the second ratchet wheel.
5. The novel ratchet structure bicycle rear hub of claim 4, wherein: the elastic piece is a tower spring, an elastic piece accommodating cavity is formed between the second inner gear ring and the second bearing accommodating cavity, and the elastic piece is arranged in the elastic piece accommodating cavity.
6. The novel bicycle rear hub with a ratchet structure as claimed in claim 1, wherein: the number of teeth of the first ratchet wheel and the second ratchet wheel ranges from 10 teeth to 180 teeth.
7. The novel bicycle rear hub with a ratchet structure as claimed in claim 1, wherein: the angle of the tooth bevel angle of the first ratchet wheel and the second ratchet wheel ranges from 5 degrees to 60 degrees.
8. The novel bicycle rear hub with a ratchet structure as claimed in claim 1, wherein: the first bearing is an angular contact bearing or a deep groove ball bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122026850.7U CN215826384U (en) | 2021-08-26 | 2021-08-26 | Novel bicycle rear hub with ratchet structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122026850.7U CN215826384U (en) | 2021-08-26 | 2021-08-26 | Novel bicycle rear hub with ratchet structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215826384U true CN215826384U (en) | 2022-02-15 |
Family
ID=80197117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122026850.7U Active CN215826384U (en) | 2021-08-26 | 2021-08-26 | Novel bicycle rear hub with ratchet structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215826384U (en) |
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2021
- 2021-08-26 CN CN202122026850.7U patent/CN215826384U/en active Active
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