Transmission mechanism for bicycle and bicycle

Abstract

The invention belongs to the technical field of bicycles, and discloses a transmission mechanism for a bicycle and the bicycle. The transmission mechanism for the bicycle comprises a rotating assembly and two transmission assemblies, the rotating assembly comprises a rotating shaft and a rotating sleeve, the outer wall of the rotating sleeve is configured to be fixedly connected with spokes of a wheel, and the rotating shaft is sleeved with the rotating sleeve and rotationally connected with the rotating shaft; a plurality of tooth grooves are concavely formed in the inner wall of the rotating sleeve at equal intervals in the circumferential direction, at least one convex tooth is arranged on the outer wall of the rotating shaft, and each convex tooth can selectively abut against one tooth groove; the two transmission assemblies are arranged on the two sides of the rotating shaft correspondingly. Each transmission assembly comprises a pedal assembly and a reset assembly, and the pedal assembly is configured to be rotationally connected with the frame and fixedly connected with the rotating shaft; the reset assembly is fixed to the frame and fixedly connected with the rotating shaft. Through cooperation of the convex teeth and the tooth grooves, rotation of the wheel is achieved, the maintenance cost is low, generated vibration and noise are small, the wheel is driven to rotate by treading and loosening the pedal assembly, and a user has good riding experience.

Description

Technical Field

[0001] The present invention relates to the technical field of bicycles, and in particular to a transmission mechanism for a bicycle and a bicycle. Background Art

[0002] A bicycle, also known as a bike or a bicycle, is mainly powered by pedaling. The wheels are driven by pedaling to achieve riding.

[0003] During riding, the bicycle can only move forward by relying on the transmission mechanism. The existing bicycle transmission mechanism is generally a chain drive, but the chain drive will be disconnected due to wear between the chain and the sprocket due to long-term operation, which will increase the maintenance cost. In addition, the chain drive will also generate vibration and noise, which will affect the user's riding experience.

[0004] Therefore, there is an urgent need for a bicycle transmission mechanism to solve the above technical problems. Summary of the invention

[0005] The object of the present invention is to provide a bicycle transmission mechanism and a bicycle, which have low maintenance costs, generate less vibration and noise, and provide users with a good riding experience.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] On the one hand, a bicycle transmission mechanism is provided, comprising:

[0008] A rotating assembly comprises a rotating shaft and a rotating sleeve, wherein the outer wall of the rotating sleeve is configured to be fixedly connected to the spokes of the wheel, and the rotating sleeve is sleeved outside the rotating shaft and is rotatably connected to the rotating shaft; the inner wall of the rotating sleeve is concavely provided with a plurality of tooth grooves at equal intervals along the circumferential direction, and the outer wall of the rotating shaft is provided with at least one convex tooth, and each of the convex teeth can selectively abut against one of the tooth grooves;

[0009] Two groups of transmission assemblies are respectively arranged on both sides of the rotating shaft; each group of the transmission assemblies includes a pedal assembly and a reset assembly, the pedal assembly is configured to be rotatably connected to the frame and fixedly connected to the rotating shaft, when the pedal assembly is stepped on, the pedal assembly can drive the rotating shaft to rotate, and the convex tooth drives the rotating sleeve to rotate; the reset assembly is fixed to the frame and fixedly connected to the rotating shaft, when the pedal assembly is released, the reset assembly is used to reset the rotating shaft and the pedal assembly, and make the convex tooth enter the next tooth groove.

[0010] In some possible embodiments, the pedal assembly includes a pedal member, a connecting member and a first pulling member, the pedal member is connected to one end of the connecting member, the connecting member is rotatably connected to the frame, one end of the first pulling member is fixedly connected to the connecting member, and the other end of the first pulling member is fixedly connected to the rotating shaft.

[0011] In some possible embodiments, the reset assembly includes a fixed seat, a rotating member, a first elastic member and a second pulling member, the fixed seat is fixed to the frame, the rotating member is sleeved on the fixed seat and rotatably connected to the fixed seat, the two ends of the first elastic member are respectively fixed to the fixed seat and the rotating member, and the two ends of the second pulling member are respectively fixed to the rotating member and the rotating shaft.

[0012] In some possible implementations, both the first pulling member and the second pulling member are belts.

[0013] In some possible embodiments, the two groups of the reset assemblies share the same fixed seat, which includes a rotating rod and two fixing members fixed on both sides of the rotating rod, the two rotating members are both sleeved on the rotating rod and rotatably connected to the rotating rod, and the two fixing members are both fixed to the frame.

[0014] In some possible embodiments, the rotating shaft is provided with a connecting portion, the convex tooth sleeve is arranged outside the connecting portion and is rotatably connected to the connecting portion, and the rotating assembly also includes a second elastic member, and two ends of the second elastic member are respectively fixed to the connecting portion and the convex tooth.

[0015] In some possible implementations, the second elastic member is a torsion spring, the torsion spring is sleeved and attached to the connecting portion, the convex tooth is sleeved outside the torsion spring, and two ends of the torsion spring are respectively fixed to the connecting portion and the convex tooth.

[0016] In some possible embodiments, the rotating sleeve includes a first sleeve body and two second sleeve bodies, the two second sleeve bodies are respectively fixed on both sides of the first sleeve body, the inner wall of the first sleeve body is recessed with a plurality of the tooth grooves, and the inner wall of the second sleeve body is in contact with the outer wall of the rotating shaft.

[0017] In some possible embodiments, a first rotating part and a second rotating part are respectively provided at both ends of the rotating shaft, and the first rotating part and the second rotating part are sequentially arranged from the inside to the outside along the axial direction of the rotating shaft, the reset assembly is fixedly connected to the first rotating part, and the pedal assembly is fixedly connected to the second rotating part.

[0018] On the other hand, a bicycle is provided, comprising a wheel, a frame and a bicycle transmission mechanism as described in any of the above schemes, wherein the wheel comprises spokes, the outer wall of the rotating sleeve is fixedly connected to the spokes, the pedal assembly is rotatably connected to the frame, and the reset assembly is fixed to the frame.

[0019] Beneficial effects of the present invention:

[0020] The bicycle transmission mechanism provided by the present invention comprises a rotating assembly and two groups of transmission assemblies. When in use, the user drives the rotating shaft to rotate by stepping on the pedal assembly, and drives the convex teeth to drive the rotating sleeve to rotate, so as to realize the rotation of the wheel, and then releases the pedal assembly, and the reset assembly resets the rotating shaft and the pedal assembly, so that the convex teeth enter the next tooth groove, and then continues to step on the pedal assembly, and the convex teeth and the tooth groove abut to continue to drive the rotating sleeve to rotate, and so on. The transmission assembly is provided with two groups, which are respectively arranged on both sides of the rotating shaft. When in use, the user can realize riding by stepping on the pedal assembly on one side of the rotating shaft with the left foot and releasing it, and then the right foot continues to step on the pedal assembly on the other side of the rotating shaft and then releases it, and then the left foot continues to step on the pedal assembly on one side of the rotating shaft and releases it, and so on. The bicycle transmission mechanism provided by the present invention realizes the rotation of the wheel through the cooperation of the convex teeth and the tooth groove, has low maintenance cost, generates less vibration and noise, and drives the wheel to rotate by stepping on and releasing the pedal assembly, so that the user has a good riding experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a bicycle provided by the present invention;

[0022] Figure 2 It is a structural schematic diagram of the bicycle transmission mechanism provided by the present invention;

[0023] Figure 3 It is a partial structural schematic diagram of the rotating assembly involved in the present invention;

[0024] Figure 4 yes Figure 3 A partial enlarged view of the middle A;

[0025] Figure 5 It is a partial structural schematic diagram of the reset component involved in the present invention.

[0026] In the figure:

[0027] 1. Rotating assembly; 11. Rotating shaft; 111. Protruding teeth; 1111. Second fixing plate; 112. Connecting part; 113. First rotating part; 114. Second rotating part; 115. Third rotating part; 116. Fourth rotating part; 117. Fifth rotating part; 12. Rotating sleeve; 121. Tooth groove; 1211. Rotating abutting surface; 1212. Guide surface; 122. First sleeve body; 123. Second sleeve body; 13. Second elastic member;

[0028] 2. Transmission assembly; 21. Pedal assembly; 211. Pedal member; 2111. Connecting shaft; 212. Connecting member; 2121. First connecting rod; 2122. Second connecting rod; 213. First pulling member; 22. Reset assembly; 221. Fixed seat; 2211. Rotating rod; 2212. Fixed member; 2213. First fixed plate; 222. Rotating member; 223. First elastic member; 224. Second pulling member;

[0029] 101. wheel; 1011. spokes; 102. frame. DETAILED DESCRIPTION

[0030] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0031] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0033] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0034] like Figures 1 to 5 As shown, the present invention provides a bicycle transmission mechanism, including a rotating assembly 1 and two transmission assemblies 2. The rotating assembly 1 includes a rotating shaft 11 and a rotating sleeve 12, the outer wall of the rotating sleeve 12 is configured to be fixedly connected to the spokes 1011 of the wheel 101, and the rotating sleeve 12 is sleeved outside the rotating shaft 11 and is rotatably connected to the rotating shaft 11; the inner wall of the rotating sleeve 12 is concavely provided with a plurality of tooth grooves 121 at equal intervals along the circumferential direction, and the outer wall of the rotating shaft 11 is provided with at least one convex tooth 111, and each convex tooth 111 can selectively abut against one of the tooth grooves 121; the two transmission assemblies 2 are respectively arranged on both sides of the rotating shaft 11; each transmission assembly 2 includes The pedal assembly 21 and the reset assembly 22, the pedal assembly 21 is configured to be rotatably connected to the frame 102 and fixedly connected to the rotating shaft 11. When the pedal assembly 21 is stepped on, the pedal assembly 21 can drive the rotating shaft 11 to rotate, and the convex tooth 111 drives the rotating sleeve 12 to rotate; the reset assembly 22 is fixed to the frame 102 and fixedly connected to the rotating shaft 11. When the pedal assembly 21 is released, the reset assembly 22 is used to reset the rotating shaft 11 and the pedal assembly 21, and the convex tooth 111 enters the next tooth groove 121. Optionally, the tooth groove 121 has a rotation abutment surface 1211 and a guide surface 1212. When the pedal assembly 21 drives the rotating shaft 11 to rotate, the convex tooth 111 abuts against the rotation abutment surface 1211. When the pedal assembly 21 is released, the convex tooth 111 abuts against the guide surface 1212 and can enter the next tooth groove 121.

[0035] When in use, the user drives the rotating shaft 11 to rotate by stepping on the pedal assembly 21, and the convex teeth 111 drive the rotating sleeve 12 to rotate, so as to realize the rotation of the wheel 101. After releasing the pedal assembly 21, the reset assembly 22 resets the rotating shaft 11 and the pedal assembly 21, so that the convex teeth 111 enter the next tooth groove 121. Then continue to step on the pedal assembly 21, and the convex teeth 111 and the tooth groove 121 can continue to drive the rotating sleeve 12 to rotate, and the operation is cyclical. The transmission assembly 2 is provided with two groups, which are respectively arranged on both sides of the rotating shaft 11. When in use, the user can cross-step with both feet to realize riding. For example, after the left foot steps on the pedal assembly 21 on one side of the rotating shaft 11 and releases it, the right foot continues to step on the pedal assembly 21 on the other side of the rotating shaft 11 and then releases it, and then the left foot continues to step on the pedal assembly 21 on one side of the rotating shaft 11 and releases it, and the operation is cyclical. In addition, the two groups of transmission assemblies 2 of this embodiment are symmetrically arranged to ensure that the user exerts force evenly. The bicycle transmission mechanism provided by the present invention realizes the rotation of the wheel 101 through the cooperation of the convex teeth 111 and the tooth grooves 121, has low maintenance costs, generates less vibration and noise, and drives the wheel 101 to rotate by pressing and releasing the pedal assembly 21, so that the user has a good riding experience.

[0036] Alternatively, if Figure 1 As shown, the pedal assembly 21 includes a pedal member 211, a connecting member 212 and a first pulling member 213. The pedal member 211 is connected to one end of the connecting member 212, and the connecting member 212 is rotatably connected to the frame 102. One end of the first pulling member 213 is fixedly connected to the connecting member 212, and the other end of the first pulling member 213 is fixedly connected to the rotating shaft 11. When in use, the user steps on the pedal member 211 to drive the connecting member 212 to rotate on the frame 102. Through the rotation of the connecting member 212, the first pulling member 213 pulls the rotating shaft 11 to rotate counterclockwise. Such a configuration has a simple structure, reduces vibration and noise, and optimizes the riding experience. Optionally, in this embodiment, a connecting hole is provided at one end of the connecting member 212, and a connecting shaft 2111 is fixed to the pedal member 211, and the connecting shaft 2111 is rotatably connected to the connecting hole, so that the user's pedaling operation is more flexible. In addition, the footrest member 211 is a foot pedal, which increases the contact area between the foot and the footrest member 211 and facilitates exertion.

[0037] Specifically, the connecting member 212 includes a first connecting rod 2121, a second connecting rod 2122 and two pins, one end of the first connecting rod 2121 is connected to the pedal member 211, the other end of the first connecting rod 2121 is fixedly connected to one end of the second connecting rod 2122, a pin passes through the other end of the first connecting rod 2121 and one end of the second connecting rod 2122 and is connected to the frame 102, and the other end of the second connecting rod 2122 is connected to the first pulling member 213 through another pin. Such a configuration facilitates the disassembly and assembly of the connecting member 212, and facilitates the processing of the connecting member 212.

[0038] Optionally, in this embodiment, the reset assembly 22 includes a fixed seat 221, a rotating member 222, a first elastic member 223 and a second pulling member 224. The fixed seat 221 is fixed to the frame 102. The rotating member 222 is sleeved on the fixed seat 221 and is rotatably connected to the fixed seat 221. The two ends of the first elastic member 223 are respectively fixed to the fixed seat 221 and the rotating member 222. The two ends of the second pulling member 224 are respectively fixed to the rotating member 222 and the rotating shaft 11. When the user steps on the pedal assembly 21 to rotate the rotating shaft 11, since one end of the second pulling member 224 is fixed to the rotating shaft 11, the rotating member 222 rotates relative to the fixed seat 221, and the first elastic member 223 is elastically deformed. When the pedal assembly 21 is released, the first elastic member 223 is reset, and the rotating shaft 11 and the pedal assembly 21 are reset at the same time. The rotating member 222 is rotatably connected to the fixing seat 221, thereby increasing the structural strength of the reset assembly 22, and the second pulling member 224 can fit the outer wall of the rotating member 222, thus playing a certain guiding role when the second pulling member 224 is bent.

[0039] Optionally, the first elastic member 223 is a torsion spring, which is sleeved and fitted on the fixed seat 221, and the rotating member 222 is sleeved outside the torsion spring, and the two ends of the torsion spring are respectively fixed to the fixed seat 221 and the rotating member 222. Such a configuration facilitates the rotation of the rotating member 222 on the fixed seat 221, and the torsion spring is located inside the rotating member 222, which can prevent dust from falling on the torsion spring. Specifically, a first fixing plate 2213 is provided on the fixed seat 221, and one end of the torsion spring is fixed on the first fixing plate 2213. In addition, the first elastic member 223 can also be a tension spring or a compression spring.

[0040] Optionally, in other embodiments, the rotating member 222 and the fixed seat 221 may not be provided, and the reset assembly 22 includes a first elastic member 223 and a second pulling member 224, one end of the first elastic member 223 is fixed to the frame 102, one end of the second pulling member 224 is fixedly connected to the other end of the first elastic member 223, the other end of the second pulling member 224 is fixedly connected to the rotating shaft 11, and the first elastic member 223 is a tension spring or a compression spring, which can realize the reset of the rotating shaft 11 and the pedal assembly 21.

[0041] Optionally, in this embodiment, the first pulling member 213 and the second pulling member 224 are both belts, which have good elasticity, can alleviate impact and vibration, make the movement smooth and noiseless, and are relatively durable. In other embodiments, the first pulling member 213 and the second pulling member 224 can also be pull ropes.

[0042] Optionally, in this embodiment, two groups of reset assemblies 22 share the same fixed seat 221, the fixed seat 221 includes a rotating rod 2211 and two fixing members 2212 fixed on both sides of the rotating rod 2211, the two rotating members 222 are both sleeved on the rotating rod 2211 and are rotatably connected to the rotating rod 2211, and the two fixing members 2212 are both fixed to the frame 102. Such an arrangement improves the structural strength of the transmission mechanism for a single vehicle, and is more convenient to install. Specifically, the reset assembly 22 also includes a bolt and a nut, the bolt passes through the fixing member 2212 and the frame 102 and is threadedly connected to the nut, which is convenient for disassembly.

[0043] Optionally, in this embodiment, if Figure 3 and Figure 4 As shown, the rotating shaft 11 is provided with a connecting portion 112, the convex tooth 111 is sleeved outside the connecting portion 112 and is rotatably connected to the connecting portion 112, and the rotating assembly 1 further includes a second elastic member 13, and the two ends of the second elastic member 13 are respectively fixed to the connecting portion 112 and the convex tooth 111. When the reset assembly 22 resets the rotating shaft 11, the second elastic member 13 is provided to reduce the friction between the convex tooth 111 and the tooth groove 121, so that the convex tooth 111 is easy to abut against the next tooth groove 121.

[0044] Optionally, the second elastic member 13 is a torsion spring, which is sleeved and fitted on the connecting portion 112, and the convex tooth 111 is sleeved outside the torsion spring, and the two ends of the torsion spring are respectively fixed to the connecting portion 112 and the convex tooth 111. Such a configuration facilitates the rotation of the convex tooth 111 on the connecting portion 112, and the torsion spring is located inside the convex tooth 111, making the structure compact. In addition, the inner wall of the convex tooth 111 is provided with a second fixing plate 1111, and one end of the torsion spring is fixed on the second fixing plate 1111. In addition, the second elastic member 13 can also be a tension spring or a compression spring.

[0045] Optionally, in this embodiment, if Figure 2 and Figure 3 As shown, the rotating sleeve 12 includes a first sleeve body 122 and two second sleeve bodies 123, the two second sleeve bodies 123 are respectively fixed on both sides of the first sleeve body 122, the inner wall of the first sleeve body 122 is concavely provided with a plurality of tooth grooves 121, and the inner wall of the second sleeve body 123 is in contact with the outer wall of the rotating shaft 11. The inner wall of the second sleeve body 123 is in contact with the outer wall of the rotating shaft 11, guiding the rotation of the first sleeve body 122 relative to the rotating shaft 11, and protecting the plurality of tooth grooves 121 and the protruding teeth 111 on the inner wall of the first sleeve body 122.

[0046] Optionally, in this embodiment, the first rotating part 113 and the second rotating part 114 are respectively provided at both ends of the rotating shaft 11, and the first rotating part 113 and the second rotating part 114 are sequentially arranged from the inside to the outside along the axial direction of the rotating shaft 11, and the reset assembly 22 is fixedly connected to the first rotating part 113, and the pedal assembly 21 is fixedly connected to the second rotating part 114. The pedal assembly 21 is arranged outside the reset assembly 22 to avoid collision and interference between the pedal assembly 21 and the reset assembly 22 when the pedal assembly 21 is stepped on, and to avoid interference between the first pulling member 213 and the second pulling member 224 during operation. Specifically, the cross-sectional area of ​​the second rotating part 114 is smaller than the cross-sectional area of ​​the first rotating part 113, which further avoids interference between the first pulling member 213 and the second pulling member 224 during operation.

[0047] Specifically, the rotating shaft 11 includes a third rotating portion 115, a fourth rotating portion 116 and a fifth rotating portion 117. The fourth rotating portion 116 and the fifth rotating portion 117 are respectively provided at both ends of the third rotating portion 115 in sequence from the inside to the outside along the axial direction. The fourth rotating portion 116 is fixedly connected to the third rotating portion 115, and the fifth rotating portion 117 is transmission-connected to the fourth rotating portion 116 and fixedly connected to the first rotating portion 113.

[0048] The present invention also provides a bicycle, including a wheel 101, a frame 102 and a bicycle transmission mechanism, wherein the wheel 101 includes spokes 1011, the outer wall of the rotating sleeve 12 is fixedly connected to the spokes 1011, the pedal assembly 21 is rotatably connected to the frame 102, and the reset assembly 22 is fixed to the frame 102. The bicycle has low maintenance cost, generates less vibration and noise, and the wheel 101 is driven to rotate by pressing and releasing the pedal assembly 21, so that the user has a good riding experience.

[0049] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A transmission mechanism for a bicycle, characterized in that: include: A rotating assembly (1) comprises a rotating shaft (11) and a rotating sleeve (12), wherein the outer wall of the rotating sleeve (12) is configured to be fixedly connected to the spokes (1011) of the wheel (101), and the rotating sleeve (12) is sleeved outside the rotating shaft (11) and is rotatably connected to the rotating shaft (11); the inner wall of the rotating sleeve (12) is provided with a plurality of tooth grooves (121) at equal intervals along the circumferential direction, and the outer wall of the rotating shaft (11) is provided with at least one convex tooth (111), and each of the convex teeth (111) can selectively abut against one of the tooth grooves (121); Two groups of transmission components (2) are respectively arranged on both sides of the rotating shaft (11); each group of the transmission components (2) includes a pedal component (21) and a reset component (22); the pedal component (21) is configured to be rotatably connected to the frame (102) and fixedly connected to the rotating shaft (11); when the pedal component (21) is stepped on, the pedal component (21) can drive the rotating shaft (11) to rotate, and the convex tooth (111) drives the rotating sleeve (12) to rotate; the reset component (22) is fixed to the frame (102) and fixedly connected to the rotating shaft (11); when the pedal component (21) is released, the reset component (22) is used to reset the rotating shaft (11) and the pedal component (21), and to make the convex tooth (111) enter the next tooth groove (121).

2. The bicycle transmission mechanism according to claim 1, characterized in that: The pedal assembly (21) comprises a pedal member (211), a connecting member (212) and a first pulling member (213); the pedal member (211) is connected to one end of the connecting member (212); the connecting member (212) is rotatably connected to the vehicle frame (102); one end of the first pulling member (213) is fixedly connected to the connecting member (212); and the other end of the first pulling member (213) is fixedly connected to the rotating shaft (11).

3. The bicycle transmission mechanism according to claim 2, characterized in that: The reset assembly (22) comprises a fixed seat (221), a rotating member (222), a first elastic member (223) and a second pulling member (224); the fixed seat (221) is fixed to the vehicle frame (102); the rotating member (222) is sleeved on the fixed seat (221) and is rotatably connected to the fixed seat (221); two ends of the first elastic member (223) are respectively fixed to the fixed seat (221) and the rotating member (222); and two ends of the second pulling member (224) are respectively fixed to the rotating member (222) and the rotating shaft (11).

4. The bicycle transmission mechanism according to claim 3, characterized in that: The first pulling member (213) and the second pulling member (224) are both belts.

5. The bicycle transmission mechanism according to claim 3, characterized in that: The two groups of the reset assemblies (22) share the same fixed seat (221); the fixed seat (221) comprises a rotating rod (2211) and two fixing members (2212) fixed on both sides of the rotating rod (2211); the two rotating members (222) are both sleeved on the rotating rod (2211) and rotatably connected to the rotating rod (2211); and the two fixing members (2212) are both fixed to the vehicle frame (102).

6. The bicycle transmission mechanism according to claim 1, characterized in that: The rotating shaft (11) is provided with a connecting portion (112), the convex tooth (111) is sleeved outside the connecting portion (112) and is rotatably connected to the connecting portion (112), and the rotating assembly (1) also includes a second elastic member (13), two ends of the second elastic member (13) are respectively fixed to the connecting portion (112) and the convex tooth (111).

7. The bicycle transmission mechanism according to claim 6, characterized in that: The second elastic member (13) is a torsion spring, which is sleeved and fitted on the connecting portion (112), the convex tooth (111) is sleeved outside the torsion spring, and the two ends of the torsion spring are respectively fixed to the connecting portion (112) and the convex tooth (111).

8. The bicycle transmission mechanism according to any one of claims 1 to 7, characterized in that: The rotating sleeve (12) comprises a first sleeve body (122) and two second sleeve bodies (123), wherein the two second sleeve bodies (123) are respectively fixed on two sides of the first sleeve body (122), the inner wall of the first sleeve body (122) is recessed with a plurality of tooth grooves (121), and the inner wall of the second sleeve body (123) is in contact with the outer wall of the rotating shaft (11).

9. The bicycle transmission mechanism according to any one of claims 1 to 7, characterized in that: A first rotating part (113) and a second rotating part (114) are respectively provided at both ends of the rotating shaft (11); the first rotating part (113) and the second rotating part (114) are sequentially arranged from inside to outside along the axial direction of the rotating shaft (11); the reset assembly (22) is fixedly connected to the first rotating part (113); and the pedal assembly (21) is fixedly connected to the second rotating part (114).

10. A bicycle, characterized in that: The invention comprises a wheel (101), a frame (102) and a bicycle transmission mechanism as claimed in any one of claims 1 to 9, wherein the wheel (101) comprises spokes (1011), an outer wall of a rotating sleeve (12) is fixedly connected to the spokes (1011), a pedal assembly (21) is rotationally connected to the frame (102), and a reset assembly (22) is fixed to the frame (102).

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