CN220286255U - Single-stage flywheel for bicycle - Google Patents

Abstract

The utility model relates to a single-stage flywheel for a bicycle, which belongs to the field of bicycle accessories, and aims at solving the problems of large number of parts and inconvenient disassembly and assembly of the existing flywheel, and adopts the following technical scheme: a bicycle single-stage flywheel comprises a flywheel core and a jacket sleeved on the flywheel core, wherein a pawl and a pawl spring for limiting the pawl are arranged between the flywheel core and the jacket, the outer wall of the jacket is provided with a ratchet, the inner wall of the jacket is provided with a embedding groove, and the pawl can be arranged at the embedding groove in a sliding manner; the bearing is radially limited between the flying core and the outer sleeve, and the bearing and the embedded groove are arranged side by side along the axis direction of the flying core and/or the outer sleeve and are radially limited through the inner wall of the outer sleeve; the flying cover is connected with the flying core to axially limit the bearing. The rotating connection of the flying core and the outer sleeve can be realized only through a single bearing, so that the number of parts is effectively reduced, the disassembly and assembly process is simplified, and the disassembly and assembly time is shortened; the bearing and the embedded groove are arranged side by side along the axis direction of the flying core and/or the outer sleeve, and the bearing, the pawl and the pawl spring are not affected when being disassembled and assembled, so that the disassembly and the assembly are convenient.

Description

Single-stage flywheel for bicycle

Technical Field

The utility model belongs to the field of bicycle accessories, and particularly relates to a bicycle single-stage flywheel.

Background

The existing single-stage flywheel is provided with a jacket and a flywheel core which are matched with the chain for use, wherein a pawl is arranged between the jacket and the flywheel core, the chain drives the flywheel to rotate during pedaling, the pawl is sprung up, the jacket and the flywheel core synchronously rotate, the flywheel drives the wheel to rotate, the pawl falls off when pedaling is stopped, the jacket and the flywheel core are separated, the jacket stops rotating, the flywheel core rotates along with the wheel, balls are further arranged in the traditional flywheel structure and used for reducing friction force between the jacket and the flywheel core, and two groups of steel balls with more quantity are usually used and need to be assembled and disassembled one by one; the pawl in the existing single-stage flywheel structure is positioned between two groups of steel balls, and the positions of the steel balls on one side need to be paid attention to at any time during disassembly and assembly so as to prevent the steel balls from falling off; in addition, a plurality of gaskets are needed to adjust the assembly clearance of the steel balls in the axial direction and the radial direction so as to avoid the problems that the steel balls cannot rotate due to clamping or shift due to assembly looseness, and the existing flywheel is long in assembly and disassembly time and inconvenient to assemble and disassemble.

Disclosure of Invention

Aiming at the problems of large number of parts and inconvenient disassembly and assembly of the existing flywheel, the utility model provides a single-stage flywheel for a bicycle, wherein a bearing is arranged in the single-stage flywheel for reducing friction between an outer sleeve and a flywheel core, and the single-stage flywheel is convenient to disassemble and assemble and short in use.

The utility model adopts the following technical scheme: a bicycle single-stage flywheel comprises a flywheel core and a jacket sleeved on the flywheel core, wherein a pawl and a pawl spring for limiting the pawl are arranged between the flywheel core and the jacket, the outer wall of the jacket is provided with a ratchet, the inner wall of the jacket is provided with an embedded groove, and the pawl can be arranged at the embedded groove in a sliding manner; a bearing is radially limited between the flying core and the outer sleeve, and the bearing and the embedded groove are arranged side by side along the axial direction of the flying core and/or the outer sleeve; and a flying cover is connected with the flying core and axially limits the bearing.

The rotating connection of the flying core and the outer sleeve can be realized only through a single bearing, so that the number of parts is effectively reduced, the disassembly and assembly process is simplified, and the disassembly and assembly time is shortened; the bearing and the embedded groove are arranged side by side along the axis direction of the flying core and/or the outer sleeve, the bearing, the pawl and the pawl spring are independent of each other and do not affect each other when being disassembled, the positions of the bearing, the pawl and the pawl spring do not need to be noticed at any time, and the disassembly is convenient.

Further, the bearing is provided with an outer ring and an inner ring, and a check ring is further arranged between the flying cover and the bearing and is used for pressing the outer ring and limiting the outer ring axially; the flying cover compresses the inner ring and is used for axially limiting the inner ring. The outer ring and the inner ring of the bearing are limited through different parts respectively, and the problem that the bearing moves outwards and deflects obliquely when being stressed can be prevented by the arrangement.

Further, a gap is arranged between the retainer ring and the flying cover, so that the flying cover is prevented from influencing the rotation of the outer ring and further influencing the movement of the outer sleeve.

Further, a groove is formed in the inner wall of the outer sleeve, the retainer ring is embedded in the groove, and the retainer ring can deform radially, so that the retainer ring is embedded in the groove or taken out of the groove after deformation. Specifically, a notch is formed on the retainer ring, so that the retainer ring can radially deform, or the retainer ring is an elastic piece such as plastic, rubber and the like and elastically deforms by using the retainer ring; because the retainer ring can deform, the retainer ring can be disassembled and assembled by applying less force, and the operation is convenient.

Further, a smooth section is arranged on the inner wall of the outer sleeve and is located between the groove and the embedded groove, the smooth section is in interference fit with the outer ring so as to radially limit the bearing, a step is formed at the joint of the smooth section and the embedded groove, and the outer ring of the bearing is arranged at the step to realize axial limit. The smooth section that sets up can reduce the bearing dismouting degree of difficulty, can also guarantee simultaneously that bearing and overcoat are closely laminated, reduces bearing and overcoat aversion probability, guarantees single-stage flywheel life.

Further, a limit section for embedding a pawl and a pawl spring is arranged on the flying core, and when the flying core is assembled with the outer sleeve, the limit section is matched with the embedded groove in position. During assembly, the pawl and the pawl spring are firstly arranged on the fly core, then the bearing is assembled on the outer sleeve, and then the bearing is axially limited through the fly cover, so that the fly core and the outer sleeve are fixed in position.

Further, the first end of the flying core is provided with an annular outer edge, the annular outer edge extends outwards along the radial direction of the limiting section, when the flying core and the outer sleeve are assembled, an assembly gap is formed between the annular outer edge and the outer sleeve, and the annular outer edge can cover the limiting section. The annular outer edge plays a role of shielding so as to prevent the pawl and the pawl spring from being exposed. The assembly gap is arranged between the annular outer edge and the outer sleeve, so that the outer sleeve and the flying core are not in direct contact with each other, and the outer sleeve and the flying core are not affected when the bearing rotates.

Further, a threaded clamping section is arranged at the second end of the flying core, so that the flying cover is matched with the clamping section through threads, and at least one limiting hole is formed in the clamping section. During assembly, the outer end of the clamping section protrudes from the outer sleeve, the position of the limiting hole protrudes from the surface of the flying cover, and the limiting hole can facilitate the clamping section of the dismounting tool to effectively prevent the tool from slipping.

Further, a concave cavity is formed in the inner wall of the outer sleeve, and the concave cavity is adjacent to the embedded groove and is used for accommodating the annular outer edge. The concave cavity can accommodate the annular outer edge, so that the assembled flying core and the end face of the outer sleeve have no obvious protrusions, and the flying core and the outer sleeve cannot be scratched when in use, and are good in integrity.

Further, the number of the ratchets is 14 or more. The width of overcoat can be influenced to the ratchet quantity, and this setting can avoid the width of overcoat too wide, bearing atress uneven, overall structure unstable.

The utility model has the beneficial effects that: according to the bicycle single-stage flywheel, the rotating connection of the flywheel core and the outer sleeve can be realized through the single bearing, so that the number of parts is effectively reduced, the disassembly and assembly difficulty is reduced, and the disassembly and assembly time is shortened; and the bearing and the embedded groove are arranged side by side along the axis direction of the flying core and/or the outer sleeve, the bearing, the pawl and the pawl spring are not affected when being disassembled and assembled, and the disassembly and the assembly are convenient.

Drawings

FIG. 1 is a schematic view of the overall structure of a bicycle single-stage flywheel;

FIG. 2 is a schematic diagram of an assembled structure of a bicycle single-stage flywheel;

FIG. 3 is a schematic view of the internal structure of a bicycle single-stage flywheel;

FIG. 4 is a schematic illustration of a jacket structure;

FIG. 5 is a schematic view of a flying core structure;

in the figure: 1-flying cores; 11-a limit section; 12-an annular outer rim; 13-clamping sections; 14-limiting holes; 15-an assembly section; 16-a yielding groove; 2-coat; 21-ratchet teeth; 22-an embedded groove; 23-grooves; 24-smooth section; 25-steps; 26-a cavity; 3-pawl; 4-detent springs; 5-bearing; 51-an outer ring; 52-an inner ring; 6-flying cover; 7-check ring.

Detailed Description

The technical solutions of the embodiments of the present utility model will be explained and illustrated below with reference to the drawings of the present utility model, but the following embodiments are only preferred embodiments of the present utility model, and not all the embodiments. Based on the examples in the implementation manner, other examples obtained by a person skilled in the art without making creative efforts fall within the protection scope of the present utility model.

The single-stage flywheel for the bicycle of the embodiment, as shown in fig. 1 and 2, comprises a flywheel core 1 and a jacket 2 sleeved on the flywheel core 1, wherein a pawl 3 and a pawl spring 4 for limiting the pawl 3 are arranged between the flywheel core 1 and the jacket 2, a ratchet 21 is arranged on the outer wall of the jacket 2, a built-in groove 22 is formed in the inner wall of the jacket 2, and the pawl 3 can be slidably arranged at the built-in groove 22; the bearing 5 is radially limited between the flying core 1 and the outer sleeve 2, in particular by the outer wall of the flying core 1 and the inner wall of the outer sleeve 2, and the bearing 5 and the embedded groove 22 are arranged side by side along the axial direction of the flying core 1 and/or the outer sleeve 2; the flying cover 6 is connected with the flying core 1 and axially limits the bearing 5.

The rotating connection of the flying core 1 and the outer sleeve 2 can be realized only through a single bearing 5, so that the number of parts is effectively reduced, the disassembly and assembly process is simplified, and the disassembly and assembly time is shortened; and the bearing 5 and the embedded groove 22 are arranged side by side along the axial direction of the flying core 1 and/or the outer sleeve 2, and the bearing 5, the pawl 3 and the pawl spring 4 are not affected when being disassembled and assembled, so that the disassembly and the assembly are convenient.

The bearing 5 is provided with an outer ring 51 and an inner ring 52, a retainer ring 7 is further arranged between the flying cover 6 and the bearing 5, the retainer ring 7 is tightly pressed against the outer ring 51 for axially limiting the outer ring 51, and the flying cover 6 is tightly pressed against the inner ring 52 for axially limiting the inner ring 52. The outer ring 51 and the inner ring 52 of the bearing 5 are limited by different components respectively, and the arrangement can prevent the bearing 5 from moving outwards and inclining when being stressed.

As shown in fig. 3, a gap is provided between the retainer ring 7 and the flying cover 6, so as to prevent the flying cover 6 from affecting the rotation of the outer ring 51 and thus the movement of the outer sleeve 2. The outer ring 51 and the inner ring 52 are tightly pressed and axially limited through the retainer ring 7 and the fly cover 6, so that the fly core 1 and the outer sleeve 2 are not directly contacted all the time, and collision and friction can not be generated between the fly core 1 and the outer sleeve 2 when the bearing rotates, thereby influencing the service life of the single-stage flywheel.

The inner wall of the outer sleeve 2 is provided with a groove 23, the retainer ring 7 is embedded in the groove 23, and the retainer ring 7 can be deformed radially, so that the retainer ring 7 is embedded in the groove 23 or taken out from the groove 23 after being deformed. Specifically, a notch is formed on the retainer ring 7, so that the retainer ring 7 can radially deform, or the retainer ring 7 is an elastic piece such as plastic, rubber and the like, and is elastically deformed by the retainer ring 7; in this setting, because retaining ring 7 is flexible, then only need exert less power to retaining ring 7 and can realize the dismouting, the simple operation.

As shown in fig. 4, the inner wall of the outer sleeve 2 is provided with a smooth section 24, the smooth section 24 is located between the groove 23 and the embedded groove 22, the smooth section 24 is in interference fit with the outer ring 51 so as to radially limit the bearing 5, a step 25 is formed at the joint of the smooth section 24 and the embedded groove 22, and the outer ring 51 of the bearing 5 is lapped on the step 25 to realize axial limit. The smooth section 24 that sets up can reduce the dismouting degree of difficulty of bearing 5, can also guarantee simultaneously that bearing 5 and overcoat 2 closely laminate, effectively reduces bearing 5 and overcoat 2 aversion probability, guarantees single-stage flywheel life.

As shown in fig. 5, the flyer 1 is provided with a limit section 11 for embedding the pawl 3 and the pawl spring 4, and when the flyer 1 is assembled with the outer sleeve 2, the limit section 11 is in position adaptation with the embedding groove 22. During assembly, the pawl 3 and the pawl spring 4 are firstly arranged on the fly core 1, then the bearing 5 is assembled on the outer sleeve 2, and then the bearing 5 is axially limited through the fly cover 6, so that the fly core 1 and the outer sleeve 2 are fixed in position.

The first end of the flying core 1 is provided with an annular outer edge 12, the first end is one end close to the limiting section 11, the annular outer edge 12 extends outwards along the radial direction of the limiting section 11, the height of the annular outer edge 12 is higher than that of the limiting section 11, when the flying core 1 and the outer sleeve 2 are assembled, an assembly gap is formed between the annular outer edge 12 and the outer sleeve 2, and the annular outer edge 12 can cover the limiting section 11. The annular outer rim 12 serves as a shield to prevent the pawl 3 and the pawl spring 4 from being exposed. The assembly gap is arranged between the annular outer edge 12 and the outer sleeve 2, so that the outer sleeve 2 and the flying core 1 can be ensured not to be in direct contact with each other, and the outer sleeve 2 and the flying core 1 are not affected by each other when the bearing rotates.

The second end of the flying core 1 is provided with a threaded clamping section 13, the second end is the end far away from the annular outer edge 12, the threaded is external, the flying cover 6 is provided with internal threads, the flying cover 6 is matched with the clamping section 13 through threads, and the clamping section 13 is provided with at least one limiting hole 14. During assembly, the outer end of the clamping section 13 protrudes from the outer sleeve 2, the position of the limiting hole 14 protrudes from the surface of the flying cover 6, and the limiting hole 14 can facilitate the clamping section 13 to be clamped by the dismounting tool, so that the tool is effectively prevented from slipping.

The assembly section 15 is also arranged on the flying core 1, the assembly section 15 is a smooth surface, and when the flying core 1 is assembled with the outside, a gap is arranged between the assembly section 15 and the inner ring 52 of the bearing 5 so as to reduce the disassembly and assembly difficulty between the flying core 1 and the outer sleeve 2. Because the outer sleeve and the outer ring are in interference fit, if the flywheel core and the inner ring are assembled in a pressed mode, the single-stage flywheel is difficult to assemble, and therefore a gap is formed between the assembly section 15 and the inner ring 52, and the disassembly and assembly difficulty can be reduced.

As shown in fig. 5, the limiting section 11 and the assembling section 15 of the flying core 1 are provided with a yielding groove 16 for yielding the pawl 3, so as to prevent the pawl 3 from interfering with the outer sleeve 2 when the flying core 1 and the outer sleeve 2 are assembled.

A cavity 26 is provided in the inner wall of the outer casing 2, and the cavity 26 is adjacent to the embedded groove 22 and is used for accommodating the annular outer edge 12. The concave cavity 26 can accommodate the annular outer edge 12, so that the assembled flying core 1 and the end face of the outer sleeve 2 have no obvious bulge, and cannot be scratched when in use, and the integrity is good.

The number of the ratchets 21 is 14 or more. The number of the ratchets 21 can influence the width of the outer sleeve 2, and the arrangement can avoid the over-wide width of the outer sleeve 2, uneven stress of the bearing 5 and unstable overall structure.

While the utility model has been described in terms of specific embodiments, it will be appreciated by those skilled in the art that the utility model is not limited thereto but includes, but is not limited to, those shown in the drawings and described in the foregoing detailed description. Any modifications which do not depart from the functional and structural principles of the present utility model are intended to be included within the scope of the appended claims.

Claims (10)

1. The single-stage flywheel for the bicycle is characterized by comprising a flywheel core and a jacket sleeved on the flywheel core, wherein a pawl and a pawl spring for limiting the pawl are arranged between the flywheel core and the jacket; the outer wall of the outer sleeve is provided with a ratchet, the inner wall of the outer sleeve is provided with a embedding groove, and the pawl can be arranged at the embedding groove in a sliding manner; a bearing is radially limited between the flying core and the outer sleeve, and the bearing and the embedded groove are arranged side by side along the axial direction of the flying core and/or the outer sleeve; and a flying cover is connected with the flying core and axially limits the bearing.

2. The bicycle single-stage flywheel according to claim 1, wherein the bearing has an outer ring and an inner ring, and a retainer ring is further arranged between the flywheel cover and the bearing, and the retainer ring compresses the outer ring for axially limiting the outer ring; the flying cover compresses the inner ring and is used for axially limiting the inner ring.

3. A bicycle single stage flywheel as claimed in claim 2 wherein a gap is provided between the retaining ring and the flywheel cover.

4. A bicycle single-stage flywheel according to claim 2 or 3, wherein the inner wall of the casing is provided with a recess, the collar being embedded in the recess, the collar being radially deformable.

5. The bicycle single-stage flywheel according to claim 4, wherein the inner wall of the outer sleeve is provided with a smooth section, the smooth section is located between the groove and the embedded groove, the smooth section is in interference fit with the outer ring so as to radially limit the bearing, a step is formed at the joint of the smooth section and the embedded groove, and the outer ring of the bearing is lapped on the step.

6. The bicycle single-stage flywheel according to claim 1 or 2, characterized in that the flywheel core is provided with a limit section for embedding a pawl and a pawl spring, and the limit section is adapted to the position of the embedding groove when the flywheel core is assembled with the outer sleeve.

7. The bicycle single-stage flywheel according to claim 6, wherein the first end of the flywheel core is provided with an annular outer rim extending radially outwardly from the spacing section, wherein an assembly gap is provided between the annular outer rim and the outer jacket when the flywheel core and the outer jacket are assembled, and wherein the annular outer rim is capable of concealing the spacing section.

8. The bicycle single stage flywheel of claim 7 wherein the second end of the flywheel core is provided with a threaded clamping section such that the flywheel cover is threadably engaged with the clamping section, the clamping section having at least one limiting aperture formed therein.

9. The bicycle single stage flywheel of claim 7 wherein the inner wall of the housing defines a recess adjacent the recessed groove for receiving the annular outer rim.

10. The bicycle single-stage flywheel according to claim 1, wherein the number of ratchet teeth is 14 or more.