Novel bicycle transmission mechanism

Abstract

The utility model discloses a novel bicycle transmission mechanism, and belongs to the field of bicycles. The chain wheel device comprises a pedal force arm, a balance arm, a chain wheel disc, a pedal force arm bearing seat, a pedal force arm angle control arm, a balance arm bearing seat, a connecting arm bearing seat and a left force arm, the chain wheel disc is fixedly installed on a middle shaft at the right side end of a bicycle frame, and the pedal force arm bearing seat is fixedly installed on the edge of the chain wheel disc. The pedal force arm is fixedly installed on the pedal force arm bearing seats, the balance arm is arranged at the upper end of the pedal force arm, the balance arm bearing seats are installed at the two ends of the balance arm respectively, and the pedal force arm angle control arms are fixedly connected to the two ends of the balance arm respectively. The other ends of the pedal force arm angle control arms are fixedly connected to connecting arm bearing seats fixedly installed on the right side of the bicycle frame, and the left force arm is fixedly installed at the left side end of the bicycle middle shaft. The problems that an existing bicycle is strenuous in riding and not high in speed are solved, and the riding efficiency of the bicycle can be improved by meeting the riding requirements of the legs of the human body.

Description

TECHNICAL FIELD

[0001] The present application relates to the bicycle technical field, specifically to a new bicycle transmission mechanism. BACKGROUND

[0002] The current bicycle is developing more and more perfect, various bicycles have made various improvements in terms of labor saving and fast riding.

[0003] But the traditional bicycle still has the following problems in the actual use process, limited by the requirements of human leg riding and the structure of the bicycle frame, the length of the bicycle pedal arm is limited, which restricts the development of more labor-saving bicycle riding; therefore, it does not meet the existing needs, and for this we propose a new bicycle transmission mechanism. SUMMARY

[0004] The purpose of the present application is to provide a new bicycle transmission mechanism, which can greatly increase the length of the pedal arm by adapting to the requirements of human leg riding, and also further increase the diameter of the chain wheel, so as to achieve the purpose of more labor-saving and faster riding of the bicycle, and solve the problems raised in the above background technology.

[0005] To achieve the above purpose, the present application provides the following technical scheme: a new bicycle transmission mechanism, including a pedal arm, a balance arm, a chain wheel, a pedal arm bearing seat, a pedal arm angle control arm, a balance arm bearing seat, a connecting arm bearing seat and a left force arm, the chain wheel is fixedly installed on the right end of the bicycle frame, the pedal arm bearing seat is fixedly installed at the edge of the chain wheel, the pedal arm is fixedly installed on the pedal arm bearing seat, the upper end of the pedal arm is provided with the balance arm, the balance arm bearing seat is installed at both ends of the balance arm, the pedal arm angle control arm is fixedly connected at both ends of the balance arm, the other end of the pedal arm angle control arm is fixedly connected to the connecting arm bearing seat fixedly installed on the right side of the bicycle frame, and the left force arm is fixedly installed on the left end of the bicycle shaft.

[0006] The pedal force arm is provided with a pedal fixing hole and a chain wheel disc fixing connection shaft hole; the balance arm is provided with a bearing seat fixing hole and a shaft hole one; the chain wheel disc is provided with a chain wheel disc center fixing shaft hole, a pedal force arm shaft hole, a bearing seat fixing screw hole and a chain wheel tooth; the pedal force arm bearing seat is composed of a bearing seat one and a partition one, the bearing seat one is provided with a bearing mounting hole one and a fixing screw hole one, and the partition one is provided with a shaft hole two and a fixing screw hole two; the pedal force arm angle control arm is provided with a shaft hole three; the balance arm bearing seat is provided with a bearing mounting hole two and a fixing screw hole three, wherein the partition used by the balance arm bearing seat is replaced by two ends of the balance arm; the connecting arm bearing seat is composed of a bearing seat two and a partition two, the bearing seat two is provided with a bearing mounting hole three and a fixing screw hole four, and the partition two is provided with a shaft hole four and a fixing screw hole five; the left force arm is provided with a left force arm fixing shaft hole, and the left force arm is welded with a left force arm bearing seat, and the left force arm bearing seat is provided with a partition three, a bearing mounting hole four and a fixing screw hole six, and the partition three is provided with a shaft hole five and a fixing screw hole seven.

[0007] Further, one end of the pedal force arm is fixedly connected at the edge of the chain wheel disc through the second movable fixing point of the pedal force arm bearing seat, and the pedal force arm angle control arm, the left force arm, the chain wheel disc and the bicycle middle shaft are fixedly connected, so that the pedal force arm and the footstool fixedly installed on the pedal force arm move in an elliptical track with controllable up-down and front-back angles in a small cycle form in front of the chain wheel disc under the action and control of the chain wheel disc and the bicycle middle shaft.

[0008] Further, the pedal force arm bearing seat is fixedly installed at the edge of the chain wheel disc through the fixing screw hole one, the fixing screw hole two and the bearing seat fixing screw hole to serve as the second movable fixing point of the pedal force arm, one end of the pedal force arm is fixedly connected at the edge of the chain wheel disc through the second movable fixing point of the pedal force arm bearing seat, and the pedal force arm angle control arm, the left force arm, the chain wheel disc and the bicycle middle shaft are fixedly connected, so that the pedal force arm and the footstool fixedly installed on the pedal force arm move in an elliptical track with controllable up-down and front-back angles in a small cycle form in front of the chain wheel disc under the action and control of the chain wheel disc and the bicycle middle shaft.

[0009] Further, the pedal force arm bearing seat fixedly installed at the edge of the chain wheel disc and the left force arm bearing seat welded on the left force arm serve as the second movable fixing point, and when each part is connected and matched to work, the length of the pedal force arm is doubled, and the diameter of the chain wheel disc is also increased.

[0010] Compared with the prior art, the beneficial effects of the present application are:

[0011] When the connection between the first fixed point of the connecting arm bearing seat, the pedal force arm bearing seat, the second movable fixed point of the left force arm bearing seat, the pedal force arm, the balance arm, the pedal force arm angle control arm, the chain wheel disc and the left force arm is connected to work, the length of the pedal force arm can be multiplied when adapting to the requirements of the human leg riding, and the diameter of the chain wheel disc can also be increased. Moreover, one end of the pedal force arm is fixedly connected to the edge of the chain wheel disc through the second movable fixed point of the pedal force arm bearing seat, and the pedal force arm and the footstool fixedly installed on the pedal force arm can move in an up-down and front-back angle-controllable elliptical track in a small cycle in front of the chain wheel disc when working. The above design can improve the riding efficiency of the bicycle, so that the bicycle can be more labor-saving and faster when riding. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a pedal force arm structure diagram of the application;

[0013] Figure 2 It is a chain wheel disc structure diagram of the application;

[0014] Figure 3 It is a pedal force arm bearing seat structure diagram of the application;

[0015] Figure 4 It is a pedal force arm angle control arm structure diagram of the application;

[0016] Figure 5 It is a balance arm bearing seat structure diagram of the application;

[0017] Figure 6 It is a connecting arm bearing seat structure diagram of the application;

[0018] Figure 7 It is a left force arm structure diagram of the application;

[0019] Figure 8 It is a new bicycle transmission mechanism installed on the right side of the bicycle;

[0020] Figure 9 It is a new bicycle transmission mechanism installed on the left side of the bicycle.

[0021] In the figure: 1, pedal force arm; 2, pedal fixed hole; 3, sprocket wheel fixed connection shaft hole; 4, balance arm; 5, bearing seat fixed hole; 6, shaft hole one; 7, sprocket wheel; 8, sprocket wheel center fixed shaft hole; 9, pedal force arm shaft hole; 10, bearing seat fixed screw hole; 11, sprocket tooth; 12, pedal force arm bearing seat; 13, bearing seat one; 14, bearing mounting hole one; 15, fixed screw hole one; 16, spacer one; 17, shaft hole two; 18, fixed screw hole two; 19, pedal force arm angle control arm; 20, shaft hole three; 21, balance arm bearing seat; 22, bearing mounting hole two; 23, fixed screw hole three; 24, connecting arm bearing seat; 25, bearing seat two; 26, bearing mounting hole three; 27, fixed screw hole four; 28, spacer two; 29, shaft hole four; 30, fixed screw hole five; 31, left force arm; 32, left force arm fixed shaft hole; 33, left force arm bearing seat; 34, bearing mounting hole four; 35, fixed screw hole six; 36, spacer three; 37, shaft hole five; 38, fixed screw hole seven. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0023] In order to solve the technical problem that the transmission mechanism of the existing bicycle restricts the bicycle to be ridden with great effort and at low speed, please refer to Figures 1-9 The technical solutions are provided in the embodiments as follows.

[0024] The novel bicycle transmission mechanism comprises a pedal force arm 1, a balance arm 4, a sprocket wheel 7, a pedal force arm bearing seat 12, a pedal force arm angle control arm 19, a balance arm bearing seat 21, a connecting arm bearing seat 24 and a left force arm 31. The sprocket wheel 7 is fixedly installed on the middle shaft at the right end of the bicycle frame. The pedal force arm bearing seat 12 is fixedly installed at the edge of the sprocket wheel 7. The pedal force arm 1 is fixedly installed on the pedal force arm bearing seat 12. The upper end of the pedal force arm 1 is provided with the balance arm 4. The balance arm bearing seat 21 is installed at the two ends of the balance arm 4 respectively. The pedal force arm angle control arm 19 is fixedly connected at the two ends of the balance arm 4 respectively. The other end of the pedal force arm angle control arm 19 is fixedly connected on the connecting arm bearing seat 24 fixedly installed at the right side of the bicycle frame. The left force arm 31 is fixedly installed on the middle shaft at the left end of the bicycle.

[0025] The connecting arm bearing seat 24 is composed of the bearing seat two 25 and the spacer two 28. The bearing seat two 25 is provided with the bearing mounting hole three 26 and the fixed screw hole four 27. The spacer two 28 is provided with the shaft hole four 29 and the fixed screw hole five 30.

[0026] Chain wheel 7, which is provided with chain wheel center fixed shaft hole 8, pedal force arm shaft hole 9, bearing seat fixed screw hole 10 and chain wheel teeth 11.

[0027] Pedal force arm bearing seat 12, which is composed of bearing seat one 13 and spacer one 16, bearing seat one 13 is provided with bearing mounting hole one 14 and fixed screw hole one 15, spacer one 16 is provided with shaft hole two 17 and fixed screw hole two 18.

[0028] Pedal force arm 1, which is provided with pedal fixed hole 2 and chain wheel fixed connection shaft hole 3.

[0029] Balancing arm 4, which is provided with bearing seat fixed hole 5 and shaft hole one 6, pedal force arm 1 is provided with balancing arm 4.

[0030] Pedal force arm angle control arm 19, which is provided with shaft hole three 20.

[0031] Balancing arm bearing seat 21, which is provided with bearing mounting hole two 22 and fixed screw hole three 23, wherein, the spacer used by balancing arm bearing seat 21 is replaced by the two ends of the balancing arm 4.

[0032] Specifically, spacer two 28 is assembled between two bearing seat two 25, two-piece roller taper pressure bearing is respectively installed in bearing mounting hole three 26 of bearing seat two 25 on both sides of spacer two 28, and four groups are assembled in the above form, and the four groups of assembled bearing seats are respectively fixed and installed on the positions set at the left and right ends of the bicycle frame by fixed screw hole four 27 and fixed screw hole five 30 with screws, so as to serve as the first fixed point of the left and right pedal force arms 1.

[0033] Chain wheel 7 is fixedly installed on the middle shaft of the right end of the bicycle frame through chain wheel center fixed shaft hole 8, spacer one 16 is assembled between two bearing seat one 13, two-piece roller taper pressure bearing is respectively installed in bearing mounting hole one 14, and the above assembled pedal force arm bearing seat 12 is fixedly installed at the edge of chain wheel 7 through fixed screw hole one 15, fixed screw hole two 18 and bearing seat fixed screw hole 10 with screws, so as to serve as the second movable fixed point of the right pedal force arm 1.

[0034] The chain wheel disc is fixedly connected with the shaft hole 3 on the pedal force arm 1, and the pedal force arm 1 is fixedly installed on the pedal force arm bearing seat 12 by means of bolts, the two ends of the balance arm 4 are used as spacers, the balance arm bearing seats 21 (a total of four) are respectively installed at the two ends of the balance arm 4 by means of the bearing seat fixing holes 5 and the fixing screw holes three 23 through screws, two-piece roller cone pressure bearings (a total of four) are respectively installed on the balance arm bearing seats 21 through the bearing installation holes two 22, the pedal force arm angle control arms 19 (a total of two) are respectively fixedly connected with one end of the balance arm bearing seats 21 through the shaft holes three 20 by means of bolts, the other end of the pedal force arm angle control arms 19 is fixedly connected with the first fixed point of the connecting arm bearing seat 24 fixedly installed on the right side of the bicycle frame through the shaft holes three 20 by means of bolts, the bicycle pedal is fixedly installed on the pedal force arm 1 through the pedal fixing hole 2, the chain wheel disc 7 can be engaged and connected with the bicycle freewheel by means of the chain and the chain wheel teeth 11 on the chain wheel disc 7, and through the above process, the novel bicycle transmission mechanism of the application is assembled and installed on the right side of the bicycle.

[0035] The left force arm 31 is provided with the left force arm fixed shaft hole 32, and the left force arm bearing seat 33 is welded and installed on the left force arm 31, the left force arm bearing seat 33 is provided with the spacer three 36, the bearing installation hole four 34 and the fixing screw hole six 35, and the shaft hole five 37 and the fixing screw hole seven 38 are arranged on the spacer three 36.

[0036] Specifically, the left arm bearing seat 33 (two in total) is combined with the spacer three 36 together, and is fixed by screws through the fixed screw hole six 35 and the fixed screw hole seven 38. After being fixed, the two-piece roller cone pressure bearing (two in total) is respectively installed in the bearing installation hole four 34. Through the above process, the left arm bearing seat 33 assembled is welded on one end of the left arm 31 as the second movable fixed point of the pedal force arm 1. The combined left arm 31 passes through the left arm fixed shaft hole 32, so that the left arm 31 can be fixedly installed on the left side end of the bicycle middle shaft. At the same time, during installation, the left arm bearing seat 33 should be 180 degrees away from the installed pedal force arm bearing seat 12. The pedal force arm 1 is fixedly installed on the second movable fixed point of the pedal force arm bearing seat 33 through the chain wheel disc fixed connection shaft hole 3 by means of bolts. The two ends of the balance arm 4 are used as spacers. The balance arm bearing seat 21 (four in total) is fixedly installed on the two ends of the balance arm 4 through the fixed screw hole three 23 and the bearing seat fixed hole 5 by means of screws. The two-piece roller cone pressure bearing (four in total) is respectively installed in the bearing installation hole two 22. The one end of the pedal force arm angle control arm 19 (two in total) is fixedly installed on the balance arm bearing seat 21 at the two ends of the balance arm 4 through the shaft hole three 20 by means of bolts. The other end of the pedal force arm angle control arm 19 is fixedly connected with the first fixed point of the connecting arm bearing seat 24 fixedly installed on the left side of the bicycle frame through the shaft hole three 20 by means of bolts. The bicycle pedal is fixedly installed on the pedal force arm 1 through the pedal fixed hole 2. Through the above process, the new bicycle transmission mechanism of the present application is assembled and installed on the left side of the bicycle.

[0037] The pedal force arm bearing seat 12 is fixedly installed on the edge of the chain wheel disc 7 through the fixed screw hole one 15, the fixed screw hole two 18 and the bearing seat fixed screw hole 10 as the second movable fixed point of the pedal force arm 1. One end of the pedal force arm 1 is fixedly connected with the edge of the chain wheel disc 7 through the second movable fixed point of the pedal force arm bearing seat 12. The pedal force arm angle control arm 19, the left arm 31, the chain wheel disc 7 and the bicycle middle shaft are fixedly connected. Under the action and control of the chain wheel disc 7 and the bicycle middle shaft, the pedal force arm 1 and the bench fixedly installed on the pedal force arm 1 move in an elliptical track in a small cycle form in front of the chain wheel disc 7 with controllable up-down and back-and-forth angles.

[0038] The left arm bearing seat 33 is welded on one end of the left arm 31 as the second movable fixed point of the pedal force arm 1. The chain wheel disc 7 is fixedly installed on the second movable fixed points of the pedal force arm bearing seat 12 and the left arm bearing seat 33 at the edge. The pedal force arm 1 is provided with the balance arm 4.

[0039] The pedal force arm bearing seat 12 fixedly installed at the edge of the chain wheel plate 7 and the left force arm bearing seat 33 welded on the left force arm 31 serve as the second movable fixed points, and when the parts are connected and work together, the length of the pedal force arm 1 is multiplied, and the diameter of the chain wheel plate 7 is also increased.

[0040] Technical effects of the above content:

[0041] The left force arm 31 and the left force arm bearing seat 33 used in the novel bicycle transmission mechanism of the application are welded together and processed into an integrated body in actual production, and in actual use, the left force arm 31 can be replaced by a gear plate and a wheel plate according to the situation.

[0042] The length of the pedal force arm 1 can be multiplied according to the design requirements when adapting to the requirements of the human leg riding.

[0043] When the connecting arm bearing seat 24 first fixed point, the pedal force arm bearing seat 12, the left force arm bearing seat 33 second movable fixed point, the pedal force arm 1, the balance arm 4, the pedal force arm angle control arm 19, the chain wheel plate 7 and the left force arm 31 work together in the novel bicycle transmission mechanism of the application, the pedal force arm 1 and the fixedly installed pedal stool can move up and down and forward and backward in a small cycle form in front of the chain wheel plate 7, solving the problem that the pedal force arm 1 with a length that is too long and the chain wheel plate 7 with a diameter that is too large cannot be used on a bicycle to adapt to the requirements of the human leg riding.

[0044] In the novel bicycle transmission mechanism of the application, one end of the pedal force arm 1 is fixedly connected between the chain wheel fixing connection shaft hole 3 and the pedal force arm bearing seat 12 second movable fixed point, which can achieve the effect of more labor-saving riding.

[0045] The novel bicycle transmission mechanism of the application can be applied to various mechanical devices that complete work by human power or wind power.

[0046] The novel bicycle transmission mechanism of the application can be applied to various electric vehicle transmission systems and oil-electric hybrid transmission systems, improving the output torque of the electric motor, improving the vehicle speed, reducing the current consumption, and charging the storage battery during driving, which reduces energy consumption and increases the range.

[0047] The working principle of the novel bicycle transmission mechanism of the present application is as follows: when the pedals are stepped down to drive the pedal force arm 1 to work, the pedal force arm angle control arm 19 can be driven to rotate around the first fixed point of the connecting arm bearing seat 24 through the pedal force arm 1 and the balance arm 4, and in the rotating movement, the balance arm 4, the pedal force arm 1 and the pedals fixedly installed thereon are controlled to move forward and backward in a small circular motion downward through the push-pull action, at the same time, when the pedal force arm 1 moves downward, the sprocket 7 can be driven to rotate through the second movable fixed point of the pedal force arm bearing seat 12 fixedly installed at the edge of the sprocket 7, and the angle and the forward and backward movement distance of the pedal force arm 1 in the movement are controlled through the second movable fixed point of the pedal force arm bearing seat 12, at the same time, the sprocket teeth 11 on the sprocket 7 are engaged with the chain to drive the freewheel and the wheel to work, and at the same time, the sprocket 7 is fixedly connected with the right side end of the middle shaft of the bicycle, thereby driving the left force arm 31 and the second movable fixed point of the left force arm bearing seat 33 at the right side end of the middle shaft, and further driving the pedal force arm 1 and the pedals fixedly installed thereon to move from the lower stop point position to the upper stop point position, and in the movement, the pedal force arm angle control arm 19 fixedly connected with the balance arm 4 is driven to rotate around the first fixed point of the connecting arm bearing seat 24 fixedly installed at the left side of the bicycle frame, and in the rotating movement, the angle distance and the backward movement distance of the pedal force arm 1 in the upward movement are controlled through the push-pull action, when the pedals at the right side of the bicycle and the second movable fixed point of the pedal force arm bearing seat 12 reach the lower stop point position, the pedals at the left side of the bicycle and the second movable fixed point of the left force arm bearing seat 33 also reach the upper stop point position, at this time, a working process is completed, through the continuous reciprocating working of the pedal force arms 1 at the left and right sides of the bicycle and the working of the connected components, the complete working process of the novel bicycle transmission mechanism of the present application on the bicycle is completed continuously.

[0048] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting, since the scope of the present application will be limited only by the appended claims. It is to be understood that the terms such as first and second, etc., are used herein merely to differentiate one element from another, and do not necessarily imply or require any actual relationship or order between the elements. Also, the terms "include", "comprise" or any other variants are intended to cover non-exclusive inclusion, so that processes, methods, articles, or apparatuses including a series of elements not only include those elements, but also include other elements not explicitly listed, or further include inherent elements of such processes, methods, articles, or apparatuses.

[0049] While the embodiments of the present application have been shown and described, it is to be understood that the embodiments can be varied, modified, replaced and altered in many ways without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A new type of bicycle transmission mechanism comprising a pedal force arm (1), a balancing arm (4), a sprocket wheel (7), a pedal force arm bearing seat (12), a pedal force arm angle control arm (19), a balancing arm bearing seat (21), a connecting arm bearing seat (24) and a left force arm (31), characterized in that, The chain wheel plate (7) is fixedly installed on the middle shaft of the right end of the bicycle frame, the pedal force arm bearing seat (12) is fixedly installed at the edge of the chain wheel plate (7), the pedal force arm (1) is fixedly installed on the pedal force arm bearing seat (12), the upper end of the pedal force arm (1) is provided with a balance arm (4), balance arm bearing seats (21) are respectively installed at the two ends of the balance arm (4), pedal force arm angle control arms (19) are respectively fixedly connected at the two ends of the balance arm (4), the other ends of the pedal force arm angle control arms (19) are respectively fixedly connected on the connecting arm bearing seats (24) fixedly installed on the right side of the bicycle frame, and the left force arm (31) is fixedly installed on the left end of the middle shaft of the bicycle. The pedal force arm (1) is provided with a pedal fixing hole (2) and a chain wheel plate fixing connecting shaft hole (3) on the pedal force arm (1); the balance arm (4) is provided with a bearing seat fixing hole (5) and a shaft hole (6) on the balance arm (4); the chain wheel plate (7) is provided with a chain wheel plate center fixing shaft hole (8), a pedal force arm shaft hole (9), a bearing seat fixing screw hole (10) and a chain wheel tooth (11) on the chain wheel plate (7); the pedal force arm bearing seat (12) is composed of a bearing seat (13) and a spacer (16), the bearing seat (13) is provided with a bearing mounting hole (14) and a fixing screw hole (15) on the bearing seat (13), and the spacer (16) is provided with a shaft hole (17) and a fixing screw hole (18) on the spacer (16); the pedal force arm angle control arm (19) is provided with a shaft hole (20) on the pedal force arm angle control arm (19); the balance arm bearing seat (21) is provided with a bearing mounting hole (22) and a fixing screw hole (23) on the balance arm bearing seat (21), wherein the spacer of the balance arm bearing seat (21) is replaced by the two ends of the balance arm (4); the connecting arm bearing seat (24) is composed of a bearing seat (25) and a spacer (28), the bearing seat (25) is provided with a bearing mounting hole (26) and a fixing screw hole (27) on the bearing seat (25), and the spacer (28) is provided with a shaft hole (29) and a fixing screw hole (30) on the spacer (28); the left force arm (31) is provided with a left force arm fixing shaft hole (32) on the left force arm (31), meanwhile, the left force arm (31) is welded with a left force arm bearing seat (33), the left force arm bearing seat (33) is provided with a spacer (36), a bearing mounting hole (34) and a fixing screw hole (35) on the left force arm bearing seat (33), and the spacer (36) is provided with a shaft hole (37) and a fixing screw hole (38) on the spacer (36).

2. The new bicycle transmission mechanism according to claim 1, characterized in that: The pedal force arm bearing seat (12) is fixedly installed at the edge of the sprocket disc (7) through the first fixing screw hole (15), the second fixing screw hole (18) and the bearing seat fixing screw hole (10) to serve as the second movable fixing point of the pedal force arm (1), one end of the pedal force arm (1) is fixedly connected at the edge of the sprocket disc (7) through the second movable fixing point of the pedal force arm bearing seat (12), the pedal force arm angle control arm (19), the left force arm (31), the sprocket disc (7) and the bicycle middle shaft are fixedly connected, under the action and control of the sprocket disc (7) and the bicycle middle shaft, the pedal force arm (1) and the footstool fixedly installed on the pedal force arm (1) move in an elliptical track in a small cycle form in front of the sprocket disc (7) and are controllable in up-down and front-back angles.

3. The new bicycle transmission mechanism according to claim 1, characterized in that: The left force arm bearing seat (33) is welded at one end of the left force arm (31) to serve as the second movable fixing point of the pedal force arm (1), the sprocket disc (7) is fixedly installed at the second movable fixing points of the pedal force arm bearing seat (12) and the left force arm bearing seat (33) at the edge, and the pedal force arm (1) is provided with the balance arm (4).

4. The new bicycle transmission mechanism according to claim 3, characterized in that: The pedal force arm bearing seat (12) fixedly installed at the edge of the sprocket disc (7) and the left force arm bearing seat (33) welded on the left force arm (31) serve as the second movable fixing points, and when each part is connected and matched to work, the length of the pedal force arm (1) is doubled, and meanwhile, the diameter of the sprocket disc (7) is also increased.

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