One-way clutch type flywheel
By setting a clutch structure between the inner and outer rings of the flywheel, the noise problem during the flywheel rotation is solved, and the stability and sensitivity of forward transmission are achieved, which is convenient to assemble and reduces wear.
Patent Information
- Application Number
- CN202422891358.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-26
- Publication Date
- 2025-08-26
- Estimated Expiration
- 2034-11-26
AI Technical Summary
The existing flywheel produces noise when it rotates in reverse.
A clutch structure is arranged between the inner ring and the outer ring of the flywheel, including an abutment ring, a clutch convex ring, a clutch arrangement groove, abutment member and an elastic member. Through the spacing design between the clutch surface and the abutment ring surface, the abutment member and abutment ring surface are combined when the flywheel outer ring rotates in a direction, and are separated when the reverse rotation is performed to realize the one-way clutch function.
It reduces the noise when the flywheel rotates in reverse, improves the stability and sensitivity of the transmission, is easy to assemble and wear-resistant rings reduce wear.
Smart Images
Figure CN223270463U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of flywheel technology, and in particular to a one-way clutch flywheel. Background Art
[0002] The flywheel is a common transmission accessory in bicycles, which is used in conjunction with bicycle chains, hubs and other parts to form the transmission mechanism of the bicycle.
[0003] The flywheel consists of an inner ring that fits over and is fixedly connected to the hub, and an outer ring with a sprocket structure that mates with the bicycle chain. The inner surface of the outer ring is provided with a ratchet structure. The inner ring is equipped with a pawl mechanism that mates with the ratchet structure, enabling the outer ring to drive the inner ring in a specific direction, thereby propelling the bicycle forward. When the outer ring rotates in another direction, the outer ring is unable to drive the inner ring, and the pawl repeatedly impacts the ratchet structure, producing a specific sound. The specific direction in which the outer ring drives the inner ring is defined as the forward direction; the direction in which the outer ring fails to drive the inner ring is defined as the reverse direction.
[0004] With respect to the above-mentioned related technologies, the inventor believes that noise will be generated when the outer ring of the flywheel in the above-mentioned flywheel rotates in the opposite direction relative to the inner ring of the flywheel. Utility Model Content
[0005] In order to improve the problem of noise generated when the outer ring of the flywheel rotates in the opposite direction relative to the inner ring of the flywheel, the present application provides a one-way clutch flywheel.
[0006] The one-way clutch flywheel provided in this application adopts the following technical solution:
[0007] A one-way clutch flywheel comprises a flywheel inner ring and a flywheel outer ring mounted on the outside of the flywheel inner ring; a clutch structure is arranged between the flywheel inner ring and the flywheel outer ring; the clutch structure comprises an abutment ring surface arranged on the flywheel inner ring, a clutch convex ring arranged on the flywheel outer ring and corresponding to the abutment ring surface, a clutch arrangement groove opened at the clutch convex ring, an abutment member arranged in the clutch arrangement groove and an elastic member arranged in the clutch arrangement groove; the clutch arrangement groove has a clutch surface arranged corresponding to the abutment ring surface and an abutment end surface connected to the forward end of the clutch surface; one end of the elastic member abuts the abutment end surface and the other end abuts the abutment member; the distance between the clutch surface and the abutment ring surface gradually increases in the forward direction and the abutment member can be locked and abutted between the clutch surface and the abutment ring surface.
[0008] By adopting the above technical solution, the distance between the clutch surface and the abutment annular surface gradually increases in the forward direction. When the outer ring of the flywheel rotates in the forward direction, the abutment moves away from the abutment end surface, so that the clutch surface drives the abutment to squeeze the abutment annular surface. The clutch surface, the abutment and the abutment annular surface form a combined state, so that the outer ring of the flywheel can drive the inner ring of the flywheel to rotate synchronously; when the outer ring of the flywheel rotates in the reverse direction relative to the inner ring of the flywheel, the abutment moves closer to the abutment end surface, so that the clutch surface, the abutment and the abutment annular surface are in a separated state, so that the outer ring of the flywheel does not drive the inner ring of the flywheel to rotate synchronously. Compared with the flywheel with a traditional ratchet tooth structure, the above-mentioned one-way clutch flywheel improves the problem of noise generated during reverse rotation.
[0009] Optionally, the flywheel inner ring includes a flywheel seat and a flywheel end cover; the flywheel seat includes a flywheel base plate and a mounting tube connected to the flywheel base plate, the flywheel end cover is installed in the mounting tube at the end away from the flywheel base plate, and the abutment annular surface is arranged on the mounting tube.
[0010] By adopting the above technical solution, the specific structure of the flywheel inner ring is disclosed, and the flywheel inner ring is divided into a flywheel seat and a flywheel end cover, which facilitates the assembly of the flywheel inner ring and the flywheel outer ring.
[0011] Optionally, the clutch arrangement groove is a through groove that passes through the end surfaces on both sides of the clutch convex ring.
[0012] By adopting the above technical solution, when assembling the above one-way clutch flywheel, the clutch arrangement groove is a through groove structure, so that the abutment member and the elastic member can be more conveniently installed in the clutch arrangement groove.
[0013] Optionally, the number of the clutch arrangement grooves in the clutch structure is nine, and the nine clutch arrangement grooves are evenly spaced circumferentially arranged on the clutch convex ring.
[0014] By adopting the above technical solution, nine clutch arrangement grooves are provided in the clutch structure, and elastic members and abutment members are provided in the clutch arrangement grooves, so that when the flywheel outer ring drives the flywheel inner ring to rotate through the clutch structure, the transmission of the flywheel outer ring and the flywheel inner ring is more stable; wherein, the clutch arrangement grooves are arranged on the clutch convex ring at uniform intervals in the circumferential direction, further improving the transmission stability of the flywheel outer ring and the flywheel inner ring.
[0015] Optionally, the elastic member is a pressure spring, and the abutting member is a metal cylinder.
[0016] By adopting the above technical solution, the specific structure of the elastic part and the abutment part is disclosed. The abutment part is a metal cylinder, so that the abutment part is not easily stuck between the clutch surface and the abutment ring surface, so that when the outer ring of the flywheel rotates in the forward direction, the clutch surface, the abutment part and the abutment ring surface form a combined state. When the outer ring of the flywheel stops rotating or rotates reversely relative to the inner ring of the flywheel, the abutment part is designed as a metal cylinder, so that the abutment part can better disengage from between the clutch surface and the abutment ring surface, which helps to improve the sensitivity performance of the one-way clutch flywheel.
[0017] Optionally, the abutting end surface is provided with a clamping column for installing the pressure spring.
[0018] By adopting the above technical solution, the provision of the clamping column enables the pressure spring to maintain a stable installation position, thereby reducing the probability of the pressure spring being displaced due to vibration or force.
[0019] Optionally, a first wear-resistant ring for abutting one end of the abutting member is provided between the flywheel base plate and the clutch convex ring; a second wear-resistant ring for abutting the other end of the abutting member is provided between the flywheel end cover and the clutch convex ring.
[0020] By adopting the above technical solution, the provision of the first wear-resistant ring and the second wear-resistant ring helps the abutment to rotate with the outer ring of the flywheel, helping to reduce the wear on both ends of the abutment and the sides of both ends of the clutch convex ring.
[0021] Optionally, the mounting cylinder has a first convex ring for arranging the first wear-resistant ring; the flywheel end cover has a second convex ring for arranging the second wear-resistant ring.
[0022] By adopting the above technical solution, the arrangement of the first convex ring and the second convex ring enables the first wear-resistant ring and the second wear-resistant ring to maintain a relatively stable position during installation and operation, and are not prone to movement.
[0023] Optionally, the flywheel end cover is threadedly mounted on the mounting tube.
[0024] By adopting the above technical solution, the installation structure of the flywheel end cover and the installation barrel is simple and the assembly is relatively convenient. After the flywheel end cover and the installation barrel are assembled, the two are not easy to separate.
[0025] Optionally, the outer end surface of the flywheel end cover is provided with a plurality of tightening holes, and the plurality of tightening holes are evenly spaced in the circumferential direction with the axis of the flywheel end cover as the axis.
[0026] By adopting the above technical solution, the provision of multiple tightening holes makes the flywheel end cover more evenly stressed when installing and removing the flywheel end cover, which helps to facilitate the installation of the flywheel end cover on the installation tube of the flywheel seat.
[0027] In summary, this application includes at least one of the following beneficial technical effects:
[0028] 1. A one-way clutch flywheel, which provides a clutch structure between the flywheel inner ring and the flywheel outer ring. This reduces the probability of noise generation when the flywheel outer ring rotates in the opposite direction relative to the flywheel inner ring, compared to flywheels with traditional ratchet tooth structures.
[0029] 2. The inner ring of the flywheel includes a flywheel seat and a flywheel end cover. The mounting tube of the flywheel seat and the flywheel end cover are connected by a threaded structure, and the clutch arrangement groove of the flywheel outer ring is a through-slot structure, making the assembly of the one-way clutch flywheel more convenient;
[0030] 3. By arranging the first wear-resistant ring and the second wear-resistant ring on both end faces of the clutch convex ring for abutting the end faces of the abutting member, it helps to reduce the wear of the ends of the abutting member and the side faces of the clutch convex ring. BRIEF DESCRIPTION OF THE DRAWINGS
[0031] Figure 1 It is an exploded schematic diagram of the one-way clutch flywheel structure in an embodiment of the present application.
[0032] Figure 2 It is a cross-sectional schematic diagram of the clutch structure in the embodiment of the present application.
[0033] Figure 3 yes Figure 2 A local enlarged schematic diagram of point A in the middle.
[0034] Figure 4 It is a cross-sectional schematic diagram of a one-way clutch flywheel in an embodiment of the present application.
[0035] Explanation of the accompanying drawings: 1. Flywheel inner ring; 11. Flywheel seat; 111. Flywheel base plate; 112. Mounting tube; 1121. Mounting threaded section; 113. First convex ring; 114. Abutment ring surface; 12. Flywheel end cover; 121. Tightening hole; 122. Second convex ring; 2. Flywheel outer ring; 21. Clutch convex ring; 3. Clutch arrangement groove; 31. Clutch surface; 32. Abutment end surface; 321. Clamping column; 33. Locking end surface; 34. Abutment member; 35. Elastic member; 4. First wear-resistant ring; 5. Second wear-resistant ring. DETAILED DESCRIPTION
[0036] The following is combined with Figure 1-4 This application is described in further detail.
[0037] The embodiment of the present application discloses a one-way clutch flywheel.
[0038] Reference Figure 1A one-way clutch flywheel includes a flywheel inner ring 1 and a flywheel outer ring 2 mounted outside the flywheel inner ring 1. A clutch structure is provided between the flywheel inner ring 1 and the flywheel outer ring 2, so that the flywheel outer ring 2 can drive the flywheel inner ring 1 to rotate synchronously in the forward direction. When the flywheel outer ring 2 rotates in the reverse direction relative to the flywheel inner ring 1, the flywheel outer ring 2 and the flywheel inner ring 1 are separated.
[0039] Reference Figure 1 The flywheel inner ring 1 includes a flywheel seat 11 and a flywheel end cover 12. The flywheel seat 11 includes a flywheel base plate 111 and a mounting tube 112 connected to the flywheel base plate 111. The flywheel base plate 111 is annular, the mounting tube 112 is connected to the inner edge of the flywheel base plate 111, and the mounting tube 112 is coaxially arranged with the flywheel base plate 111. The flywheel end cover 12 is an annular metal plate structure, and the flywheel end cover 12 is threadedly mounted on the end of the mounting tube 112. The end of the mounting tube 112 is provided with a mounting thread section 1121 for threaded mounting of the flywheel end cover 12. In order to facilitate the installation of the flywheel end cover 12 on the end of the mounting tube 112, four tightening holes 121 are provided on the outer end face of the flywheel end cover 12. The four tightening holes 121 are evenly spaced circumferentially with the axis of the flywheel end cover 12 as the axis.
[0040] Reference Figure 1 and Figure 2 The clutch structure includes an abutment annular surface 114 disposed on the outside of the mounting cylinder 112, a clutch protrusion 21 disposed on the inside of the flywheel outer ring 2, a plurality of clutch arrangement grooves 3 defined in the clutch protrusion 21, an abutment member 34 disposed within each clutch arrangement groove 3, and an elastic member 35 disposed within each clutch arrangement groove 3. In this embodiment, there are nine clutch arrangement grooves 3, which are evenly spaced and arranged around the clutch protrusion 21.
[0041] Reference Figure 2 and Figure 3 The clutch arrangement groove 3 is a through groove that penetrates the end surfaces of both sides of the clutch convex ring 21. The clutch arrangement groove 3 includes a clutch surface 31 corresponding to the abutment ring surface 114, an abutment end surface 32 connected to the forward end of the clutch surface 31, and a locking end surface 33 connected to the reverse end of the clutch surface 31. When the flywheel inner ring 1 and the flywheel outer ring 2 are assembled, the distance between the clutch surface 31 and the abutment ring surface 114 gradually increases in the forward direction.
[0042] Reference Figure 2 and Figure 3The abutment member 34 is a metal cylinder, and its length is consistent with the thickness of the clutch cam 21. The outer diameter of the abutment member 34 is greater than the minimum distance between the clutch surface 31 and the abutment annular surface 114, allowing the abutment member 34 to lock and abut between the clutch surface 31 and the abutment annular surface 114. The outer diameter of the abutment member 34 is less than the maximum distance between the clutch surface 31 and the abutment annular surface 114, allowing the above-mentioned clutch structure to achieve separation between the flywheel outer ring 2, the flywheel inner ring 1, and the abutment member 34.
[0043] Reference Figure 3 The elastic member 35 is a pressure spring. One end of the pressure spring abuts against the abutting end surface 32 and the other end abuts against the abutting member 34. The flywheel outer ring 2 is provided with a clamping column 321 at the abutting end surface 32 for mounting the end of the pressure spring.
[0044] Reference Figure 1 and Figure 4 A first wear-resistant ring 4 is provided between the flywheel base plate 111 and the clutch protrusion 21, for abutting one end of the abutment member 34. A first protrusion 113 is provided at the end of the mounting tube 112 near the flywheel base plate 111, for accommodating the first wear-resistant ring 4. A second wear-resistant ring 5 is provided between the flywheel end cover 12 and the clutch protrusion 21, for abutting the other end of the abutment member 34. The flywheel end cover 12 has a second protrusion 122 for accommodating the second wear-resistant ring 5. The threaded fitting structure of the flywheel seat 11 and the flywheel end cover 12 in the flywheel inner ring 1 enables the first wear-resistant ring 4 to abut against one end face of the clutch protrusion 21, and the second wear-resistant ring 5 to abut against the other end face of the clutch protrusion 21.
[0045] Combine Figures 1 to 4 The implementation principle of a one-way clutch flywheel in the embodiment of the present application is as follows: the distance between the clutch surface 31 and the abutting annular surface 114 gradually increases in the forward direction. When the flywheel outer ring 2 rotates in the forward direction, the abutting member 34 moves away from the abutting end surface 32, so that the clutch surface 31 drives the abutting member 34 to squeeze the abutting annular surface 114, and the clutch surface 31, the abutting member 34 and the abutting annular surface 114 form a combined state, so that the flywheel outer ring 2 can drive the flywheel inner ring 1 to rotate synchronously; when the flywheel outer ring 2 rotates in the reverse direction relative to the flywheel inner ring 1, the abutting member 34 moves closer to the abutting end surface 32, so that the clutch surface 31, the abutting member 34 and the abutting annular surface 114 are in a separated state, so that the flywheel outer ring 2 does not drive the flywheel inner ring 1 to rotate synchronously.
[0046] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.
Claims
1. A one-way clutch flywheel, characterized in that: The invention comprises a flywheel inner ring (1) and a flywheel outer ring (2) installed outside the flywheel inner ring (1); a clutch structure is arranged between the flywheel inner ring (1) and the flywheel outer ring (2); the clutch structure comprises an abutting annular surface (114) arranged on the flywheel inner ring (1), a clutch convex ring (21) arranged on the flywheel outer ring (2) and corresponding to the abutting annular surface (114), a clutch arrangement groove (3) opened at the clutch convex ring (21), an abutting member (34) arranged in the clutch arrangement groove (3), and a clutch arrangement groove ( 3); the clutch arrangement groove (3) has a clutch surface (31) arranged corresponding to the abutting annular surface (114) and an abutting end surface (32) connected to the forward end of the clutch surface (31); one end of the elastic member (35) abuts against the abutting end surface (32) and the other end abuts against the abutting member (34); the spacing between the clutch surface (31) and the abutting annular surface (114) gradually increases in the forward direction and the abutting member (34) can be locked and abutted between the clutch surface (31) and the abutting annular surface (114).
2. A one-way clutch flywheel according to claim 1, characterized in that: The flywheel inner ring (1) includes a flywheel seat (11) and a flywheel end cover (12); the flywheel seat (11) includes a flywheel base plate (111) and a mounting tube (112) connected to the flywheel base plate (111); the flywheel end cover (12) is mounted on an end of the mounting tube (112) away from the flywheel base plate (111); and the abutting annular surface (114) is arranged on the mounting tube (112).
3. A one-way clutch flywheel according to claim 2, characterized in that: The clutch arrangement groove (3) is a through groove that penetrates the end surfaces on both sides of the clutch convex ring (21).
4. A one-way clutch flywheel according to claim 3, characterized in that: The number of the clutch arrangement grooves (3) in the clutch structure is nine, and the nine clutch arrangement grooves (3) are evenly spaced circumferentially arranged on the clutch convex ring (21).
5. A one-way clutch flywheel according to claim 4, characterized in that: The elastic member (35) is a pressure spring, and the abutting member (34) is a metal cylinder.
6. A one-way clutch flywheel according to claim 5, characterized in that: The abutting end surface (32) is provided with a clamping column (321) for installing the pressure spring.
7. The one-way clutch flywheel according to claim 5, characterized in that: A first wear-resistant ring (4) for abutting one end of the abutting member (34) is provided between the flywheel base plate (111) and the clutch convex ring (21); and a second wear-resistant ring (5) for abutting the other end of the abutting member (34) is provided between the flywheel end cover (12) and the clutch convex ring (21).
8. The one-way clutch flywheel according to claim 7, characterized in that: The mounting cylinder (112) has a first convex ring (113) for arranging the first wear-resistant ring (4); the flywheel end cover (12) has a second convex ring (122) for arranging the second wear-resistant ring (5).
9. The one-way clutch flywheel according to claim 2, characterized in that: The flywheel end cover (12) is threadedly mounted on the mounting tube (112).
10. The one-way clutch flywheel according to claim 9, characterized in that: The outer end surface of the flywheel end cover (12) is provided with a plurality of tightening holes (121), and the plurality of tightening holes (121) are evenly spaced in the circumferential direction with the axis of the flywheel end cover (12) as the axis.