Bicycle transmission structure and bicycle

Abstract

The invention discloses a bicycle transmission structure and a bicycle, and belongs to the technical field of bicycles, the bicycle transmission structure comprises a driving wheel and a support, a swing rod is eccentrically arranged on the driving wheel, one end of the swing rod is connected with the driving wheel, and the end, away from the driving wheel, of the swing rod is slidably connected with a driving part; the driving piece rotates around one end of the support in the circumferential direction and enables the swing rod and the driving wheel to swing in a reciprocating mode, and the driving wheel is rotationally connected to the other end of the support. The bicycle comprises the bicycle transmission structure and further comprises a frame, and the support is fixedly connected with the frame. A driven wheel is arranged on the frame, and a transmission chain is arranged between the driving wheel and the driven wheel. The transmission structure only swings in the action process, so that the rotating speed of the chain wheel of the bicycle can be reduced, meanwhile, the swing structure has a more labor-saving effect, and more labor is saved when a user uses the bicycle.

Description

Technical Field

[0001] The present invention relates to a bicycle and a cycle structure, and more particularly to a bicycle transmission structure and a bicycle. Background Art

[0002] As a common means of transportation, bicycles bring convenience to people. With the development of society, the forms of bicycles and pedal bikes have become more diverse. However, the user group of bicycles is still mainly middle-aged and younger. For some elderly groups, using bicycles will not only cause excessive physical exertion, but also the problem of riding too fast, which may lead to safety accidents. Similarly, in some situations where slow riding is required, such as pedal bikes in scenic spots, the speed should not be too fast. This is not only beneficial to the safety of other pedestrians, but also increases the slow-paced enjoyment of users. Therefore, pedal bikes suitable for slow and labor-saving situations have also come into being.

[0003] For example, Chinese patent publication number CN210284503U, published on April 10, 2020, describes a utility model entitled "A labor-saving speed-changing device for a bicycle," comprising a speed-changing bicycle and a second handlebar. The speed-changing bicycle is equipped with a speed-changing switch. The speed-changing bicycle comprises a frame, wheels, and a first handlebar. A screw rod is mounted above the first handlebar, a nut movably mounted on the surface of the screw rod, and two support rods are fixedly connected to the nut. The end of the support rod, remote from the nut, is fixedly connected to the second handlebar. A base is movably disposed within the second handlebar, and a spring is connected to the bottom of the base. A groove is formed on the surface of the second handlebar, a handle is vertically connected to the base, and a plurality of holes are formed on the surface of the second handlebar. A button is fixedly connected to the base. This device solves the problem of numbness and fatigue in the rider's arms. However, the structure is complex, and the requirements of labor-saving and slow speed cannot be met simultaneously. Summary of the Invention

[0004] The present invention overcomes the above-mentioned technical problems and provides a bicycle transmission structure and a bicycle. The transmission structure only performs a swinging motion during operation, thereby reducing the rotation speed of the vehicle's sprocket. At the same time, the swinging structure also has a more labor-saving effect, so that the bicycle can achieve the effect of slow speed while meeting the labor-saving requirements, making the vehicle have an excellent effect in slow and labor-saving situations.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solution: a bicycle transmission structure, including a driving wheel and a bracket, a swing lever is eccentrically arranged on the driving wheel, one end of the swing lever is connected to the driving wheel, and the end of the swing lever away from the driving wheel is slidingly connected to a driving member, the driving member rotates circumferentially around one end of the bracket and causes the swing lever and the driving wheel to swing back and forth, and the driving wheel is rotationally connected to the other end of the bracket. In this solution, the swing arm only swings back and forth up and down, thereby driving the transmission wheel to swing, and the driving member can rotate circumferentially around the bracket. The driving member rotates one circle around the bracket, and the active wheel can only swing back and forth once, so that the overall rotation angle of the active wheel becomes smaller, the transmission efficiency of the active wheel is reduced, and the output speed is correspondingly reduced; and the driving member is slidingly connected to the swing arm. When the driving member rotates downward, it will bear the gravity of the swing arm itself, so that the driving force of the driving member can be reduced. When the driving member rotates upward, the inertia of the circumferential rotation of the driving member can be used to return to the highest point, thereby achieving a labor-saving effect. Therefore, for the bicycle, it can achieve a slow speed effect, improve safety, and also achieve a labor-saving effect.

[0006] Preferably, the driving member is connected to the bracket via a connecting rod, the connecting rod being rotatably connected to the driving member, and the connecting rod being rotatably connected to the bracket. The driving member is connected to the bracket via the connecting rod so that the driving member can perform a circular motion with one end of the connecting rod as the center and the length of the connecting rod as the radius.

[0007] Preferably, the swing arm is detachably connected to the driving wheel, and a plurality of connection points are provided between the swing arm and the driving wheel. The swing arm and the driving wheel are detachably connected, and the swing arm and the driving wheel are connected at different points, so that the eccentricity of the swing arm relative to the driving wheel can be changed, thereby changing the swing amplitude of the swing arm and thus changing the output efficiency of the driving wheel.

[0008] Preferably, a slide groove is provided on the side of the swing arm away from the driving wheel, and the driving member is slidably connected to the slide groove. The swing arm is provided with a slide groove, and the driving member slides back and forth on the slide groove, thereby driving the swing arm to swing up and down, and finally causing the driving wheel to achieve swing output.

[0009] Preferably, a counterweight is provided on the driving wheel. The counterweight on the driving wheel can provide a certain gravity when the swing rod swings upward, making the swing rod swing more effortless.

[0010] Preferably, the swing lever comprises a first swing lever located on one side of the bracket, the first swing lever being fixedly connected to the driving wheel, and a second swing lever located on the other side of the bracket, the second swing lever being rotationally connected to the center of the driving wheel. Two sets of swing levers may be provided, one on either side of the driving wheel, thereby reducing the effort required by the drive components on both sides. To prevent the two sets of swing levers from interfering with the driving wheel, only one set of swing levers may be fixedly connected to the driving wheel, while the other set of swing levers only needs to form a rotational engagement with the driving wheel, with the rotation point located at the center of the driving wheel.

[0011] Preferably, the driving wheels include a first driving wheel and a second driving wheel, the first driving wheel and the second driving wheel being disposed on either side of the bracket, and the swing lever includes a first swing lever and a second swing lever, the first swing lever and the second swing lever being fixedly connected to the first driving wheel and the second driving wheel, respectively. In this solution, two sets of driving wheels and swing levers are provided, one on each side of the bracket. This allows the driving members on both sides to not only achieve a labor-saving effect but also provide drive output to their respective driving wheels. The drive output of the driving wheels can be independently transmitted to the rear wheel of the bicycle, thereby increasing the output rate of the bicycle to a certain extent and preventing the bicycle from being too slow.

[0012] A bicycle comprising the aforementioned bicycle transmission structure, further comprising a frame, the bracket being fixedly connected to the frame; a driven wheel being provided on the frame, and a transmission chain being provided between the driving wheel and the driven wheel. The transmission structure being arranged on the bicycle frame enables the bicycle to have a slow speed and energy-saving effect. For each rotation of the driving member, the effective rotation output of the driving wheel is less than one rotation, causing the overall rotation speed of the driven wheel to decrease, thereby relatively slowing the rotation speed of the bicycle.

[0013] Preferably, the driving member includes a pedal and a pedal shaft, wherein the pedal shaft is slidably connected to the swing arm, and the swing arm is disposed between the pedal and the frame. The pedal in the driving member can be stepped on by a user, and the swing arm can be disposed between the pedal and the frame, thereby reducing the overall size of the bicycle.

[0014] Preferably, the driving member includes a pedal and a pedal shaft, the pedal shaft is slidably connected to the swing lever, and the swing lever is arranged on the side of the pedal away from the frame. The swing lever can also be arranged on the side of the pedal away from the frame, which can improve the user's riding experience.

[0015] Compared with the prior art, the present invention has the following beneficial effects: (1) the transmission structure only performs a swinging motion during operation, thereby reducing the rotation speed of the vehicle's sprocket, thereby achieving the effect of slowing down the bicycle; (2) the swinging rod and the counterweight structure on the transmission structure can reduce the driving force of the transmission structure, thereby achieving the effect of saving effort in riding the bicycle; (3) the eccentricity of the swinging rod relative to the transmission wheel is adjustable, which can realize the adjustment of the swinging amplitude of the swinging rod and the driving wheel, thereby achieving the effect of adjusting the speed of the bicycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view of the bicycle transmission structure of the present invention.

[0017] Figure 2 This is another structural schematic diagram of the bicycle transmission structure of the present invention.

[0018] Figure 3 It is a schematic diagram of the structure of the swing rod of the present invention.

[0019] Figure 4 It is an axonometric view of a bicycle of the present invention.

[0020] Figure 5 It is an axonometric view of a bicycle of the present invention.

[0021] Figure 6 Schematic diagram of the transmission structure on the bicycle of the present invention.

[0022] Figure 7 It is a top view of the bicycle of the present invention.

[0023] In the figure: 1. driving wheel, 1.1. first driving wheel, 1.2. second driving wheel, 2. bracket, 3. swing arm, 3.1. first swing arm, 3.2. second swing arm, 4. driving member, 4.1. first driving member, 4.2. second driving member, 5. connecting rod, 6. connection point, 7. slide, 8. counterweight, 9. frame, 10. driven wheel, 10.1. first driven wheel, 10.2. second driven wheel, 11. transmission chain, 12. bearing, 13 front wheel, 14. rear wheel, 15. seat, 16. steering handle. DETAILED DESCRIPTION

[0024] The technical solution of the present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0025] Example 1: Figure 1The bicycle transmission structure shown includes a driving wheel 1, a swing rod 3 and a bracket 2. The driving wheel 1 is a circular sprocket structure. The swing rod 3 is arranged on the driving wheel 1. The swing rod 3 includes a first swing rod 3.1 and a second swing rod 3.2. The driving wheel 1 includes a first driving wheel 1.1 and a second driving wheel 1.2, wherein the first swing rod 3.1 is eccentrically arranged on the first driving wheel 1.1, and the second swing rod 3.2 is eccentrically arranged on the second driving wheel 1.2. The first swing rod 3.1 is fixedly connected to the first driving wheel 1.1, and the second swing rod 3.2 is fixedly connected to the second driving wheel 1.2. The first driving wheel 1.1 and the second driving wheel 1.2 are arranged at one end of the bracket 2 and are respectively connected to the two sides of the bracket 2 in a rotational manner. A driving member 4 is arranged at the other end of the bracket 2. Specifically, the driving member 4 includes a first driving member 4.1 and a second driving member 4.2. The first driving member 4.1 and the second driving member 4.2 are respectively connected to the end of the bracket 2 away from the driving wheel 1 through the connecting rod 5, that is, the first driving member 4.1 and the second driving member 4.2 can form a circumferential rotation relative to the end of the bracket 2, and the first driving member 4.1 and the second driving member 4.2 are arranged on both sides of the end of the bracket 2 in a center-symmetrical manner.

[0026] Furthermore, a sliding groove 7 is arranged on the first swing link 3.1 and the second swing link 3.2, and the first drive member 4.1 and the second drive member 4.2 are slidably connected to the first swing link 3.1 and the second swing link 3.2, respectively. Specifically, the first swing link 3.1 and the second swing link 3.2 are two identical rod structures, and the first drive member 4.1 and the second drive member 4.2 also have the same structure. The cooperation between the first swing link 3.1 and the first drive member 4.1 is the same as the cooperation between the second swing link 3.2 and the second drive member 4.2. Here, only the cooperation between the first swing link 3.1 and the first drive member 4.1 will be described.

[0027] Specifically, such as Figure 3As shown, the first swing link 3.1 is a square tube structure with a rectangular cross-section. The interior of the first swing link 3.1 is a hollow rectangular structure. Three sets of connection points 6 are provided at one end of the first swing link 3.1 near the first driving wheel 1.1. The rest of the first swing link 3.1 is provided with a chute 7. It should be noted that the chute 7 is arranged along the length of the first swing link 3.1. Chute holes are provided on two opposing sides of the first swing link 3.1. The chute holes do not penetrate the longitudinal ends of the first swing link 3.1, allowing the ends of the first swing link 3.1 to maintain a square tube shape, thus ensuring the structural strength of the first swing link 3.1. The width of the chute holes is smaller than the width of the first swing link 3.1. Thus, the sides of the first swing link 3.1 and the internal square tube space of the first swing link 3.1 form side ribs. In other words, the chute 7 is formed by the hollow groove, the side ribs, and the chute holes within the first swing link 3.1. A sliding shaft is provided at the end of the first driving member 4 . 1 . The first driving member 4 . 1 and the axial end of the sliding shaft are rotationally connected. The sliding shaft slides inside the sliding groove 7 via a bearing 12 .

[0028] It should be noted that the first driving member 4.1 and the second driving member 4.2 are the pedal structure of the bicycle. When a user steps on the first driving member 4.1 and the second driving member 4.2, the first driving member 4.1 and the second driving member 4.2 continuously perform a circular motion around the end of the bracket. Since the first driving member 4.1 and the second driving member 4.2 slide relative to the first swing link 3.1 and the second swing link 3.2 via the sliding shaft, during the continuous circular motion of the first driving member 4.1 and the second driving member 4.2, the first swing link 3.1 and the second swing link 3.2 will swing up and down along the circular trajectory of the first driving member 4.1 and the second driving member 4.2. Since the first swing link 3.1 and the second swing link 3.2 are fixedly connected to the first driving wheel 1.1 and the second driving wheel 1.2 on the side away from the driving member 4, the first driving wheel 1.1 and the second driving wheel 1.2 will also swing accordingly with the swing of the first swing link 3.1 and the second swing link 3.2.

[0029] Furthermore, the first swing arm 3.1 and the second swing arm 3.2 are eccentrically arranged relative to the first driving wheel 1.1 and the second driving wheel 1.2 respectively; the eccentric arrangement of the two can be the same, or can be adjusted according to needs. Therefore, in this embodiment, only the matching relationship between the first swing arm 3.1 and the first driving wheel 1.1 is described. Specifically, three groups of connection points 6 are provided on the first swing arm 3.1 and the first driving wheel 1.1. Specifically, the connection points 6 are adapted shaft hole connection structures on the first swing arm 3.1 and the first driving wheel 1.1. Three groups of connection holes are provided on the first swing arm 3.1, and three groups of connecting shafts are provided on the first driving wheel 1.1. The three groups of connection holes are arranged along the length direction of the first swing arm 3.1, and the arrangement direction of the three groups of connecting shafts is perpendicular to the radius direction of the first driving wheel 1.1. By cooperating with different connecting holes on the first swing arm 3.1 and different connecting shafts on the first driving wheel 1.1, different swing amplitudes of the first swing arm 3.1 and the first driving wheel 1.1 can be achieved. That is, when the driving member 4 rotates one circle around the bracket 2, the swing angles of the first swing arm 3.1 and the first driving wheel 1.1 will also be different, thereby changing the output efficiency of the first driving wheel 1.1.

[0030] Of course, the connection points 6 between the first swing link 3.1 and the first driving wheel 1.1 can also be configured as follows: only one set of connection holes is provided on the first swing link 3.1, and three sets of connection shafts are provided on the first driving wheel 1.1, wherein the three sets of connection shafts are arranged along the diameter of the first driving wheel 1.1. In this way, when the first swing link 3.1 and the first driving wheel 1.1 are engaged, the eccentricity of the first swing link 3.1 relative to the first driving wheel 1.1 can also be changed, thereby changing the swing amplitude of the first swing link 3.1 and the first driving wheel 1.1.

[0031] A counterweight 8 is also provided on the first driving wheel 1.1 and the second driving wheel 1.2. The counterweight 8 and the swing arm 3 are arranged on the front and rear sides of the driving wheel 1. Specifically, the swing arm 3 is arranged on the front side of the driving wheel 1, and the counterweight 8 is arranged on the rear side of the driving wheel 1. When the driving member 4 drives the swing arm 3 to rotate downward, the swing arm 3 can exert its own weight on the driving member 4, thereby making it easier for the driving member 4 to rotate downward. When the driving member 4 moves upward in the opposite direction, the counterweight 8 can exert a downward force on the driving wheel 1 through its own weight, thereby causing the driving wheel 1 to swing upward, that is, promoting the upward swing of the swing arm 3, thereby reducing the overall driving force of the driving member 4, which can greatly reduce the force applied by the user to the driving member 4 and achieve a labor-saving effect.

[0032] It should be noted that, in this embodiment, except for the bracket 2 , the driving wheel 1 , the swing rod 3 , the driving member 4 and other structures are arranged in two groups, and are symmetrically arranged on both sides of the bracket 2 as a whole.

[0033] Example 2: Figure 1 The bicycle transmission structure shown includes a driving wheel 1, a swinging rod 3, and a bracket 2. The driving wheel 1 is a circular sprocket structure. The swinging rod 3 is arranged on the driving wheel 1. The swinging rod 3 includes a first swinging rod 3.1, wherein the first swinging rod 3.1 is eccentrically arranged on the driving wheel 1 and is fixedly connected to the driving wheel 1. The driving wheel 1 is arranged at one end of the bracket 2 and is rotationally connected to the bracket 2. A driving member 4 is arranged at the other end of the bracket 2. Specifically, the driving member 4 includes a first driving member 4.1 and a second driving member 4.2. The first driving member 4.1 and the second driving member 4.2 are rotationally connected to the end of the bracket 2 away from the driving wheel 1 through a connecting rod 5. That is, the first driving member 4.1 and the second driving member 4.2 can form circumferential rotation relative to the end of the bracket 2, and the first driving member 4.1 and the second driving member 4.2 are arranged on both sides of the end of the bracket 2 with center symmetry. In addition, a second swing arm 3.2 is provided on the side of the bracket 2 away from the first swing arm 3.1. The structure of the second swing arm 3.2 is the same as that of the first swing arm 3.1, but the second swing arm 3.2 is connected to the driving wheel 1, and the center position of the second swing arm 3.2 and the driving wheel 1 forms a rotational connection.

[0034] The difference between this embodiment and embodiment 1 is that the swing arm 3 includes only the first swing arm 3.1, the driving wheel 1 has only one set, the first swing arm 3.1 is eccentrically arranged with the driving wheel 1, and the second swing arm 3.2 is used only as a labor-saving arm, rotating with the center of the driving wheel 1. Thus, when the first driving member 4.1 drives the first swing arm 3.1 to swing, it can drive the driving wheel 1 to swing back and forth. When the second driving member 4.2 drives the second swing arm 3.2 to swing, the second swing arm 3.2 can play a labor-saving role for the second driving member 4.2. The second swing arm 3.2 is not fixed to the driving wheel 1, but rotates at the center of the driving wheel 1. This can ensure that the driving wheel 1 swings back and forth under the action of the first swing arm 3.2, so that the driving wheel 1 also has rotational freedom. The implementation scheme thus constructed should also fall within the scope of protection of this application.

[0035] Furthermore, a sliding groove 7 is arranged on the first swing link 3.1 and the second swing link 3.2, and the first drive member 4.1 and the second drive member 4.2 are slidably connected to the first swing link 3.1 and the second swing link 3.2, respectively. Specifically, the first swing link 3.1 and the second swing link 3.2 are two identical rod structures, and the first drive member 4.1 and the second drive member 4.2 also have the same structure. The cooperation between the first swing link 3.1 and the first drive member 4.1 is the same as the cooperation between the second swing link 3.2 and the second drive member 4.2. Here, only the cooperation between the first swing link 3.1 and the first drive member 4.1 will be described.

[0036] Specifically, such as Figure 3As shown, the first swing link 3.1 is a square tube structure with a rectangular cross-section. The interior of the first swing link 3.1 is a hollow rectangular structure. Three sets of connection points 6 are provided at one end of the first swing link 3.1 near the driving wheel 1, and a chute 7 is provided on the rest of the first swing link 3.1. It should be noted that the chute 7 is arranged along the length of the first swing link 3.1. Chute holes are provided on two opposing sides of the first swing link 3.1. The chute holes do not penetrate the longitudinal ends of the first swing link 3.1, allowing the ends of the first swing link 3.1 to maintain a square tube shape, thus ensuring the structural strength of the first swing link 3.1. The width of the chute holes is smaller than the width of the first swing link 3.1. Thus, the sides of the first swing link 3.1 and the internal square tube space of the first swing link 3.1 form side ribs. In other words, the chute 7 is formed by the hollow groove, the side ribs, and the chute holes within the first swing link 3.1. A sliding shaft is provided at the end of the first driving member 4 . 1 . The first driving member 4 . 1 and the axial end of the sliding shaft are rotationally connected. The sliding shaft slides inside the sliding groove 7 via a bearing 12 .

[0037] It should be noted that the first and second driving members 4.1, 4.2 constitute the pedal structure of the bicycle. When a user steps on the first and second driving members 4.1, 4.2, they continuously perform circular motion around the ends of the bracket. Since the first and second driving members 4.1, 4.2 slide relative to the first and second swing arms 3.1, 3.2, respectively, via sliding shafts, during this continuous circular motion, the first and second swing arms 3.1, 3.2 swing up and down, following the circular paths of the first and second driving members 4.1, 4.2, respectively. Since the first and second swing arms 3.1, 3.2 are connected to the driving wheel 1 on the side away from the driving member 4 (the first swing arm 3.1 is fixedly connected to the driving wheel 1 eccentrically, while the second swing arm 3.2 is rotationally connected to the driving wheel 1), the driving wheel 1 also swings accordingly, following the swinging of the first and second swing arms 3.1, 3.2, respectively.

[0038] Furthermore, the connection point 6 between the first swing arm 3.1 and the driving wheel 1 can be adjusted automatically according to demand. Specifically, three groups of connection points 6 are provided on the first swing arm 3.1 and the driving wheel 1. Specifically, the connection points 6 are adapted shaft hole connection structures on the first swing arm 3.1 and the driving wheel 1. The first swing arm 3.1 is provided with three groups of connection holes, and the driving wheel 1 is provided with three groups of connection shafts. The three groups of connection holes are arranged along the length direction of the first swing arm 3.1, and the arrangement direction of the three groups of connection shafts is perpendicular to the radius direction of the driving wheel 1. By matching different connection holes on the first swing arm 3.1 with different connection shafts on the driving wheel 1, different swing amplitudes of the first swing arm 3.1 and the driving wheel 1 are achieved. That is to say, when the driving member 4 rotates around the bracket 2 once, the swing angles of the first swing arm 3.1 and the driving wheel 1 will also be different, thereby changing the output efficiency of the driving wheel 1.

[0039] Of course, the connection point 6 between the first swing link 3.1 and the driving wheel 1 can also be configured as follows: only one set of connection holes is provided on the first swing link 3.1, and three sets of connection shafts are provided on the driving wheel 1, wherein the three sets of connection shafts are arranged along the diameter direction of the driving wheel 1. In this way, when the first swing link 3.1 is engaged with the driving wheel 1, the eccentricity of the first swing link 3.1 relative to the driving wheel 1 can also be changed, thereby changing the swing amplitude of the first swing link 3.1 and the driving wheel 1.

[0040] A counterweight 8 is also provided on the driving wheel 1. The counterweight 8 and the swinging rod 3 are arranged on the front and rear sides of the driving wheel 1. Specifically, the swinging rod 3 is arranged on the front side of the driving wheel 1, and the counterweight 8 is arranged on the rear side of the driving wheel 1. When the driving member 4 drives the swinging rod 3 to rotate downward, the swinging rod 3 can exert its own weight on the driving member 4, thereby making it easier for the driving member 4 to rotate downward; when the driving member 4 moves upward in the opposite direction, the counterweight 8 can exert a downward force on the driving wheel 1 through its own weight, thereby causing the driving wheel 1 to swing upward, that is, promoting the swinging rod 3 to swing upward, thereby reducing the overall driving force of the driving member 4, which can greatly reduce the force applied by the user to the driving member 4 and achieve a labor-saving effect.

[0041] Example 3: Figure 2The bicycle transmission structure shown includes a driving wheel 1, a swinging rod 3, and a bracket 2. The driving wheel 1 is a circular sprocket structure. The swinging rod 3 is arranged on the driving wheel 1. The swinging rod 3 is eccentrically arranged on the driving wheel 1 and is fixedly connected to the driving wheel 1. The driving wheel 1 is arranged at one end of the bracket 2 and is rotationally connected to the bracket 2. A driving member 4 is arranged at the other end of the bracket 2. Specifically, the driving member 4 includes a first driving member 4.1 and a second driving member 4.2. The first driving member 4.1 and the second driving member 4.2 are rotationally connected to the end of the bracket 2 away from the driving wheel 1 via a connecting rod 5. That is, the first driving member 4.1 and the second driving member 4.2 can form a circumferential rotation relative to the end of the bracket 2, and the first driving member 4.1 and the second driving member 4.2 are arranged on both sides of the end of the bracket 2 with center symmetry.

[0042] This embodiment differs from Embodiments 1 and 2 in that only one set of swing levers and one set of driving wheels are provided, and the swing levers and driving wheels are eccentrically arranged. Thus, when the first driving member drives the swing lever to swing, it can drive the driving wheels to swing back and forth. The embodiments thus constructed should also fall within the scope of protection of this application.

[0043] Furthermore, a slide groove 7 is arranged on the swing lever 3, and the swing lever 3 can be arranged on either side of the bicycle. In this embodiment, the cooperation between the first driving member 4.1 and the slide groove 7 of the swing lever 3 is used as an example. Figure 3 As shown, the swing link 3 is a square tube structure with a rectangular cross-section. The interior of the swing link 3 is a hollow rectangular structure. Three sets of connection points 6 are provided at the end of the swing link 3 near the driving wheel 1, and a chute 7 is provided on the rest of the swing link 3. It should be noted that the chute 7 is arranged along the length of the swing link 3, with chute holes provided on two opposing sides of the swing link 3. The chute holes do not penetrate the longitudinal ends of the swing link 3, allowing the ends of the swing link 3 to maintain a square tube shape, ensuring the structural strength of the swing link 3. The width of the chute holes is smaller than the width of the swing link 3. In this way, the sides of the swing link 3 and the internal square tube space of the swing link 3 form side ribs. In other words, the chute 7 is formed by the hollow groove inside the swing link 3, the side ribs, and the chute hole. A sliding shaft is provided at the end of the first drive member 4.1. The first drive member 4.1 is rotatably connected to the axial end of the sliding shaft, and the sliding shaft slides within the chute 7 via a bearing 12.

[0044] It should be noted that the first driving member 4.1 and the second driving member 4.2 are the pedal structure of the bicycle. By stepping on the first driving member 4.1 and the second driving member 4.2, the first driving member 4.1 and the second driving member 4.2 continuously perform a circular motion around the end of the bracket. Since the first driving member 4.1 slides relative to the swinging rod 3 via the sliding shaft, the swinging rod 3 will swing up and down along the circular trajectory of the first driving member 4.1 during the continuous circular motion of the first driving member 4.1. Since the swinging rod 3 is connected to the driving wheel 1 on the side away from the driving member 4, the driving wheel 1 will also swing accordingly to follow the swing of the swinging rod 3.

[0045] Furthermore, the connection points 6 between the swing arm 3 and the driving wheel 1 can be adjusted automatically according to needs. Specifically, three groups of connection points 6 are provided on the swing arm 3 and the driving wheel 1. Specifically, the connection points 6 are adapted shaft-hole connection structures on the swing arm 3 and the driving wheel 1. The swing arm 3 is provided with three groups of connection holes, and the driving wheel 1 is provided with three groups of connection shafts. The three groups of connection holes are arranged along the length direction of the swing arm 3, and the arrangement direction of the three groups of connection shafts is perpendicular to the radius direction of the driving wheel 1. By matching different connection holes on the swing arm 3 with different connection shafts on the driving wheel 1, different swing amplitudes of the swing arm 3 and the driving wheel 1 can be achieved. That is, when the driving member 4 rotates around the bracket 2 for one circle, the swing angles of the swing arm 3 and the driving wheel 1 will also be different, thereby changing the output efficiency of the driving wheel 1.

[0046] Of course, the connection points 6 on the swing link 3 and the driving wheel 1 can also be configured as follows: only one set of connection holes is provided on the swing link 3, and three sets of connection shafts are provided on the driving wheel 1, wherein the three sets of connection shafts are arranged along the diameter direction of the driving wheel 1. In this way, when the swing link 3 is engaged with the driving wheel 1, the eccentricity of the swing link 3 relative to the driving wheel 1 can also be changed, thereby changing the swing amplitude of the swing link 3 and the driving wheel 1.

[0047] A counterweight 8 is also provided on the driving wheel 1. The counterweight 8 and the swinging rod 3 are respectively arranged on the front and rear sides of the driving wheel 1. Specifically, the swinging rod 3 is arranged on the front side of the driving wheel 1, and the counterweight 8 is arranged on the rear side of the driving wheel 1. When the driving member 4 drives the swinging rod 3 to rotate downward, the swinging rod 3 can exert its own weight on the driving member 4, thereby making it easier for the driving member 4 to rotate downward; when the driving member 4 moves upward in the opposite direction, the counterweight 8 can exert a downward force on the driving wheel 1 through its own weight, thereby causing the driving wheel 1 to swing upward, that is, promoting the swinging rod 3 to swing upward, thereby reducing the overall driving force of the driving member 4, which can greatly reduce the force applied by the user to the driving member 4 and achieve a labor-saving effect.

[0048] Example 4: Figures 4 to 7The bicycle shown includes any one of the bicycle transmission structures of Example 1, Example 2, or Example 3, and the bicycle performs best when Example 1 is used as the transmission structure. Therefore, in this embodiment, only the bicycle transmission structure of Example 1 is used to illustrate the bicycle.

[0049] The bicycle includes a frame 9, a front wheel 13, and a rear wheel 14. The front side of the frame 9 is rotatably connected to the front wheel 13, and the rear side of the frame 9 is rotatably connected to the rear wheel 14. The bicycle transmission structure described above is located in the middle of the frame 9. Specifically, the middle bottom of the frame 9 is fixedly connected to the bracket 2. The frame 9 and the bracket 2 can be integrally formed or welded together. A first driving wheel 1.1 and a second driving wheel 1.2 are respectively located on either side of the frame 9. Consequently, a first swing arm 3.1 and a second swing arm 3.2 are also located on either side of the frame 9.

[0050] A driven wheel 10 is provided at the connection position between the rear wheel 14 and the frame 9. The driven wheel 10 is also a sprocket structure. The number of the driven wheels 10 is consistent with the number of the driving wheels 1. Therefore, in this embodiment, the driven wheels 10 include a first driven wheel 10.1 and a second driven wheel 10.2. A transmission chain 11 is provided between the first driven wheel 10.1 and the first driving wheel 1.1, and a transmission chain 11 is also provided between the second driven wheel 10.2 and the second driving wheel 1.2. Power transmission is performed between the driving wheel 1 and the driven wheel 10 through the transmission chain 11.

[0051] The first driving member 4.1 and the second driving member 4.2 each include a pedal, which is slidably connected to the swing arm 3 via a pedal shaft. The frame 9 is provided with a seat 15 and a steering handle 16. When a user pedals with both legs, the first driving member 4.1 and the second driving member 4.2 perform circular motions, which in turn drive the first swing arm 3.1 and the second swing arm 3.2 to swing back and forth, thereby driving the driving wheel 1 to swing back and forth in both directions. It is understandable that, as is well known, when the driving wheel 1 swings forward, the driving wheel 1 drives the driven wheel 10 to output a rotational force to the rear wheel 14 through the transmission chain 11, thereby causing the rear wheel 14 to generate a forward rotational force; and when the driving wheel 1 swings backward, although the driving wheel 1 drives the driven wheel 10 to rotate in the reverse direction through the transmission chain 11, it does not generate a force in the opposite direction to the rear wheel 14 (i.e., it does not cause the bicycle to reverse). Due to this feature, when the driving wheel 1 swings back and forth, it intermittently outputs a transmission force, driving the driven wheel 10 to rotate forward, thereby causing the rear wheel 14 to intermittently obtain a forward rotational force.

[0052] That is to say, every time the user pedals the driving member 4 once, the driving wheel 1 swings forward and backward once. By adjusting the connection point 6 between the swing rod 3 and the driving wheel 1, the swing amplitude of the driving wheel 1 can be adjusted. In this embodiment, the maximum swing amplitude of the driving wheel 1 is one-third of the circumference (120°) and the minimum swing amplitude is one-quarter of the circumference (90°).

[0053] Because reverse rotation of the driven wheel 10 does not generate a reverse driving force on the rear wheel 14 and does not cause the vehicle to move backward, the first and second driving members 4.1, 4.2, respectively, continuously control the reciprocating swing of the first and second driving wheels 1.1, 1.2 during their continuous circular motion. This means that the first and second driven wheels 10.1, 10.2 also continuously swing back and forth. Without considering external factors, the transmission efficiency of the first and second driven wheels 1.1, 10.1 to the rear wheel 14 is only 1 / 4 to 1 / 3 of that of a conventional bicycle (corresponding to the minimum and maximum swing amplitudes of the first driving wheel 1.1, respectively). Similarly, the transmission efficiency of the second driving wheel 1.2, 10.2 to the rear wheel 14 is only 1 / 4 to 1 / 3 of that of a transmission bicycle (corresponding to the minimum and maximum swing amplitudes of the second driving wheel 10.2, respectively). The effects of the first driven wheels 10.1 and the second driven wheels 10.2 on the two sides on the rear wheel 14 are cumulative. That is, the forward rotation of the first driven wheel 10.1 and the second driven wheel 10.2 acts independently on the rear wheel shaft, and the reverse rotation has no effect on the rear wheel shaft. Therefore, when the first driving wheel 1.1 and the second driving wheel 1.2 are both adjusted to the maximum swing angle amplitude, the rotational output efficiency of the rear wheel 14 is 2 / 3 of the output efficiency of the rear wheel of the transmission bicycle. When the first driving wheel 1.1 and the second driving wheel 1.2 are both adjusted to the minimum swing angle amplitude, the rotational output efficiency of the rear wheel 14 is 1 / 2 of the output efficiency of the rear wheel of the transmission bicycle.

[0054] When the connection point 6 between the swing arm 3 and the driving wheel 1 is arranged in a continuously adjustable manner, that is, the eccentricity between the swing arm 3 and the driving wheel 1 is continuously adjustable, the output efficiency of the bicycle can be continuously adjusted between 1 / 2 and 2 / 3 (relative to the output efficiency of the transmission bicycle), thereby meeting the different slow-speed riding effects of the user.

[0055] In addition, it should be noted that since the driving wheel 1 and the driven wheel 10 only have the effect of swinging, the driving wheel 1 and the driven wheel 10 can use notched sprockets (the sprocket does not need to be designed with a complete circumference, it can be a semicircle or three-quarters of a circumference). Similarly, the transmission chain 11 does not need a full chain structure, and can be designed as a chain near the driving wheel 1 and the driven wheel 10; such implementation plans should also fall within the scope of protection of this application.

[0056] In this embodiment, the driving wheel 1 and the driven wheel 10 are designed to have a complete circumference, so the driving wheel 1 and the driven wheel 10 can be adjusted. When the driving wheel 1 or the driven wheel 10 and the transmission chain 11 are worn, the driving wheel 1 or the driven wheel 10 can be rotated to re-engage the unworn part with the transmission chain 11. In this way, the bicycle can still be used normally, thereby extending the service life of the bicycle.

[0057] When using embodiment 2 or embodiment 3, the above-mentioned effects are basically achieved, and will not be described in detail here.

Claims

1. A bicycle transmission structure, characterized in that: It includes a driving wheel and a bracket, a swing rod is eccentrically provided on the driving wheel, one end of the swing rod is connected to the driving wheel, and the swing rod is slidably connected to a driving member at one end away from the driving wheel. The driving member rotates circumferentially around one end of the bracket and makes the swing rod and the driving wheel swing back and forth. The driving wheel is rotationally connected to the other end of the bracket.

2. A bicycle transmission structure according to claim 1, characterized in that: The driving member is connected to the bracket via a connecting rod, the connecting rod is rotatably connected to the driving member, and the connecting rod is rotatably connected to the bracket.

3. A bicycle transmission structure according to claim 1, characterized in that: The swing arm and the driving wheel are detachably connected, and a plurality of connection points are provided between the swing arm and the driving wheel.

4. A bicycle transmission structure according to claim 1, characterized in that: A sliding groove is provided on a side of the swing rod away from the driving wheel, and the driving member is slidably connected to the sliding groove.

5. A bicycle transmission structure according to claim 1, characterized in that: A counterweight is provided on the driving wheel.

6. A bicycle transmission structure according to any one of claims 1 to 5, characterized in that: The swing arm includes a first swing arm located on one side of the bracket, the first swing arm is fixedly connected to the driving wheel, and a second swing arm is provided on the other side of the bracket, the second swing arm is rotatably connected to the driving wheel.

7. A bicycle transmission structure according to any one of claims 1 to 5, characterized in that: The driving wheel includes a first driving wheel and a second driving wheel, and the first driving wheel and the second driving wheel are respectively arranged on both sides of the bracket. The swing arm includes a first swing arm and a second swing arm, and the first swing arm and the second swing arm are fixedly connected to the first driving wheel and the second driving wheel respectively.

8. A bicycle characterized by: A bicycle transmission structure comprising the method according to any one of claims 1 to 7, further comprising a frame, wherein the bracket is fixedly connected to the frame; a driven wheel is provided on the frame, and a transmission chain is provided between the driving wheel and the driven wheel.

9. A bicycle according to claim 8, characterized in that: The driving member includes a pedal and a pedal shaft. The pedal shaft is slidably connected to the swing rod. The swing rod is arranged between the pedal and the frame.

10. A bicycle according to claim 8, characterized in that: The driving member includes a pedal and a pedal shaft. The pedal shaft is slidably connected to the swing rod. The swing rod is arranged on a side of the pedal away from the frame.

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