Bicycle pedal structure

Abstract

The application discloses a bicycle pedal structure which comprises a rotating shaft, a frame, a pedal and a pedal shaft, the rotating shaft is rotatably connected with the frame, a sealed cavity is formed between the outer wall of the rotating shaft and the frame, the end of the rotating shaft is fixedly connected with one end of the pedal shaft, the other end of the pedal shaft is rotatably connected with the pedal, a flow channel one is arranged in the rotating shaft, a flow channel two is arranged in the pedal shaft, one end of the flow channel two is communicated with the flow channel one, the other end of the flow channel two is provided with a piston cavity one which is perpendicular to the flow channel two, a piston one is arranged in the piston cavity one, one end of the piston one is elastically connected with one end of the piston cavity one, the other end of the piston one penetrates through the other end of the piston cavity one and is corresponded to the pedal, an oil outlet hole which is communicated with the cavity is arranged on the side wall of the flow channel one, a piston two which is communicated with the cavity is elastically connected in the frame, and a brake line is fixed on the piston two.The application has the beneficial effect of improving the safety performance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bicycle pedal, in particular to a bicycle pedal structure. BACKGROUND

[0002] Bicycle, also known as pedal car or bicycle, is usually a small land vehicle with two wheels. After a person rides the car, the power is provided by the foot pedal, which is a green and environmentally friendly transportation tool, and is also a kind of travel tool beneficial to health. Because of its advantages, bicycle is still a more mainstream transportation tool.

[0003] In the prior art, the bicycle usually only sets brake handle on the handle, and the brake handle is pulled tightly by hand to pull the brake wire, so that the brake pads on both sides of the wheel are close to each other and gradually clamp the wheel to realize braking. However, when the brake handle fails or the hand is injured, the rider cannot operate the brake handle to tighten the brake wire to realize braking, which is inconvenient to operate and dangerous, and the safety performance is not high. SUMMARY

[0004] The present application is to overcome the deficiency of low safety performance of the prior art bicycle, and provides a bicycle pedal structure which is beneficial to improve the safety performance.

[0005] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows:

[0006] A bicycle pedal structure, comprising a rotating shaft, a frame, a pedal and a pedal shaft, the rotating shaft is rotatably connected with the frame, a sealed cavity is formed between the outer wall of the rotating shaft and the frame, the end of the rotating shaft is located outside the frame and is sealingly and fixedly connected with the inside of one end of the pedal shaft, the other end of the pedal shaft is rotatably connected with the pedal, a flow channel one is arranged in the rotating shaft, a flow channel two is arranged in the pedal shaft, one end of the flow channel two is communicated with the flow channel one, the other end of the flow channel two is provided with a piston cavity one communicated therewith and perpendicular thereto, a piston one is arranged in the piston cavity one, one end of the piston one is elastically connected with one end of the piston cavity one, the other end of the piston one is located outside the other end of the piston cavity one and corresponds to the pedal after penetrating through the other end of the piston cavity one, an oil outlet hole communicated with the cavity is arranged on the side wall of the flow channel one, a piston two communicated with the cavity is elastically connected in the frame, a brake wire is fixed on the piston two, the flow channel one, the flow channel two and the piston cavity one jointly constitute an oil cavity storing oil.

[0007] The rotating shaft is rotatably connected with the frame, a sealed cavity is formed between the outer side wall of the rotating shaft and the frame, the end of the rotating shaft is fixedly connected with the inner end of the pedal shaft, the other end of the pedal shaft is rotatably connected with the foot pedal, a flow passage one is arranged in the rotating shaft, a flow passage two is arranged in the pedal shaft, one end of the flow passage two is communicated with the flow passage one, the other end of the flow passage two is provided with a piston cavity one communicated therewith and perpendicular thereto, the piston cavity one is provided with a piston one, one end of the piston one is elastically connected with one end of the piston cavity one, the other end of the piston one is located outside the other end of the piston cavity one and corresponds to the foot pedal after penetrating through the other end of the piston cavity one, an oil outlet hole communicated with the cavity is arranged on the side wall of the flow passage one, a piston two communicated with the cavity is elastically connected in the frame, the piston two is fixedly provided with a brake wire, the flow passage one, the flow passage two and the piston cavity one jointly form an oil cavity storing oil. When braking, the rider pushes the piston one inward by overcoming the elastic action with the foot, so that the oil in the oil cavity enters the cavity through the oil outlet hole and pushes the piston two to slide, the piston two tightens the brake wire, the operation is extremely simple, the rider cannot pinch the brake handle by the finger to realize braking when a special situation occurs, the safety performance is improved.

[0008] As preferred, the foot pedal comprises a connecting shaft and a pedal body, the connecting shaft is perpendicular to the pedal shaft, one end of the connecting shaft is rotatably connected with the pedal shaft, the other end of the connecting shaft is rotatably connected with the pedal body, the pedal body and the pedal shaft are located on the same side of the connecting shaft, the side of the pedal body is fixedly provided with a push block, the piston one corresponds to one end of the push block and forms a gap, the gap between the push block and the piston one gradually decreases from one end of the push block to the other end thereof. In the initial state, the piston one corresponds to one end of the push block and forms a gap, so that the rider avoids the interference between the push block and the piston one in the riding state, the pedal body can rotate and drive the bicycle to move forward; when braking, the rider drives the pedal body to rotate by the foot operation, so that the push block gradually approaches the piston one and pushes the piston one to slide inward in the rotating process, so as to realize the bicycle braking by the foot, the structure is simple, the operation is convenient, and the cost is saved.

[0009] As preferred, one side of the push block is fixedly connected with the pedal body and away from the piston one, the other side of the push block corresponds to the piston one and is arc-shaped. This design is beneficial to ensure the smoothness of the process that the push block gradually approaches the piston one and pushes the piston one to slide inward in the rotating process.

[0010] As another preferred, the pedal comprises a connecting shaft and a pedal body, the connecting shaft is perpendicular to the pedal shaft, one end of the connecting shaft is rotatably connected with the pedal shaft, the pedal body is slidably connected with the other end of the connecting shaft, and the pedal body and the pedal shaft are located on the same side of the connecting shaft. In the initial state, the pedal body is away from the piston, so that the rider can avoid the interference between the pedal body and the piston in the riding state, and the pedal body can rotate and drive the bicycle to move forward; when braking, the rider operates the pedal body by foot to gradually approach the piston and push the piston to slide inward, so as to realize the bicycle braking by foot, which is simple in structure, convenient in operation and beneficial to cost saving.

[0011] As preferred, the bottom of the pedal body is connected with the connecting shaft, the top of the pedal body is provided with a foot cover, and the foot cover is fixedly connected with the pedal body. The foot cover is more conducive to improving the rider's control of the pedal body by foot and is convenient to operate.

[0012] As preferred, the flow channel two is located at one end of the piston cavity one, the piston one is located at the other end of the piston cavity one, the piston one is provided with a plug one, one side of the plug one is fixedly connected with the piston one, the diameter of the plug one is larger than that of the piston one, the piston one is sealingly and slidably connected with the piston cavity one through the plug one, the piston cavity one is provided with a spring one, and the other side of the plug one is elastically connected with one end of the piston cavity one through the spring one. The flow channel two is located at one end of the piston cavity one, and the piston one is located at the other end of the piston cavity one, so that the piston one can more effectively extrude the internal oil liquid when sliding inward to the bottom; the diameter of the plug one is larger than that of the piston one, and the plug one is elastically connected with the piston cavity one through the spring one, so that the piston one and the plug one can be limited in the piston cavity one, and the stability of the structure is improved.

[0013] As preferred, the frame comprises a support tube beam, the end of the support tube beam is provided with a mounting tube beam which is perpendicular to the support tube beam, the outer side wall of the support tube beam and the mounting tube beam is fixedly connected and integrated, the rotating shaft penetrates the inside of the mounting tube beam and is sealingly connected with the mounting tube beam, the cavity is located between the rotating shaft and the mounting tube beam, the end of the rotating shaft is located outside the mounting tube beam, the outer side wall of the mounting tube beam is provided with a convex column which is located in the support tube beam and is fixedly connected with the mounting tube beam, the convex column is provided with a piston cavity two which is matched with the piston two, one end of the piston cavity two is communicated with the cavity, one end of the piston two is located in the piston cavity two and is sealingly and slidingly connected with the piston cavity two, the other end of the piston two is fixedly connected with the brake wire after penetrating the other end of the piston cavity two. When braking, the rider directly uses the foot or the pedal body driven by the foot to overcome the elastic effect of the spring one to push the piston one inward, so that the oil in the oil cavity enters the piston cavity two through the oil outlet hole and the cavity in sequence and pushes the piston two to slide, the piston two gradually tightens the brake wire in the sliding process to achieve the braking effect, which is extremely simple to operate, avoids the situation that the rider cannot realize braking by pinching the brake handle with fingers when a special situation occurs, and achieves the purpose of improving safety performance.

[0014] As preferred, one end of the piston two located in the piston cavity two is fixedly connected with a plug body two, the diameter of the plug body two is greater than the diameter of the piston two, one end of the piston two is sealingly and slidingly connected with the piston cavity two through the plug body two, the other end of the piston cavity two is provided with a through hole which is matched with the piston two, the support tube beam is provided with a limiting plate, the limiting plate is fixedly connected with the inner side wall of the support tube beam, the other end of the piston two is provided with a connecting block, the piston two is fixedly connected with one end of the connecting block after penetrating the through hole and the limiting plate in sequence, the piston two is slidingly connected with the through hole and the limiting plate respectively, the brake wire is fixedly connected with the other end of the connecting block after penetrating the limiting plate, the brake wire is slidingly connected with the limiting plate under the drive of the piston two, a spring two is sleeved on the piston two, one end of the spring two is connected with the limiting plate, the other end of the spring two is connected with the end of the convex column. The diameter of the plug body two is greater than the diameter of the piston two, and under the action of the spring two, the piston two and the plug body two can be limited in the piston cavity two, and the stability of the structure is improved.

[0015] As preferred, two oil seals one and two bearings are sleeved on the rotating shaft, the two oil seals one are located between the two bearings, the rotating shaft is sealingly connected with the mounting tube beam through the oil seal one, the cavity is located between the two oil seals one, and the rotating shaft is rotatably connected with the mounting tube beam through the bearings. The design of the oil seal one is conducive to preventing the oil in the cavity from leaking out, and the sealing effect is good; the design of the bearings is conducive to reducing the rotating friction of the rotating shaft and prolonging the service life of the rotating shaft.

[0016] As preferred, one side of the pedal shaft is close to the frame, and the other side of the pedal shaft is away from the frame, the end of the rotating shaft is sleeved with two oil seals two, the rotating shaft is connected with the inside of the one side of the pedal shaft close to the frame through the two oil seals two, the rotating shaft is provided with an oil inlet, the oil inlet is located between the two oil seals two, the flow channel two is connected with the flow channel one through the oil inlet, the rotating shaft is screw-connected with a nut, the pedal shaft is fixedly connected with the rotating shaft through the nut, and the nut is located on the side of the pedal shaft away from the frame. The design of the oil seal two is favorable for preventing the oil from seeping out during the flowing process of the oil in the flow channel two and the flow channel one, and the sealing effect is good.

[0017] The present application has the advantages of simple operation, high safety performance, simple structure, cost saving, high structural stability, good sealing effect, and the like. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 and Figure 2 is a structural schematic view of the present application;

[0019] Figure 3 is a sectional view of A-A in Figure 2

[0020] Figure 4 is a sectional view of B-B in Figure 2

[0021] Figure 5 is a bottom view of Figure 2

[0022] Figure 6 is an enlarged view of the structure at C in Figure 2

[0023] Figure 7 is a structural schematic view of the piston two.

[0024] ​​​​In the figure: 1. rotating shaft, 2. frame, 3. pedal, 4. pedal shaft, 5. cavity, 6. flow passage one, 7. flow passage two, 8. piston cavity one, 9. piston one, 10. oil outlet hole, 11. piston two, 12. brake cable, 13. connecting shaft, 14. pedal body, 15. push block, 16. gap, 17. foot cover, 18. plug one, 19. spring one, 20. support pipe beam, 21. installation pipe beam, 22. convex column, 23. piston cavity two, 24. plug two, 25. through hole, 26. limiting plate, 27. connecting block, 28. spring two, 29. oil seal one, 30. bearing, 31. oil seal two, 32. oil inlet, 33. nut. DETAILED DESCRIPTION

[0025] The application will be further described below in conjunction with the drawings and specific embodiments.

[0026] As Figure 1 , Figure 2 , Figure 3 and Figure 4 described in the embodiments, a bicycle pedal structure includes a rotating shaft 1, a frame 2, a pedal 3 and a pedal shaft 4, the rotating shaft 1 is rotatably connected with the frame 2, a sealed cavity 5 is formed between the outer wall of the rotating shaft 1 and the frame 2, the end of the rotating shaft 1 is located outside the frame 2 and is sealingly and fixedly connected with the inside of one end of the pedal shaft 4, the other end of the pedal shaft 4 is rotatably connected with the pedal 3, a flow passage one 6 is arranged in the rotating shaft 1, a flow passage two 7 is arranged in the pedal shaft 4, one end of the flow passage two 7 is communicated with the flow passage one 6, the other end of the flow passage two 7 is provided with a piston cavity one 8 which is communicated with the flow passage two 7 and is perpendicular to the flow passage two 7, a piston one 9 is arranged in the piston cavity one 8, one end of the piston one 9 is elastically connected with one end of the piston cavity one 8, the other end of the piston one 9 penetrates through the other end of the piston cavity one 8 and is located outside the piston cavity one 8 and corresponds to the pedal 3, an oil outlet hole 10 is arranged on the side wall of the flow passage one 6 and is communicated with the cavity 5, a piston two 11 is elastically connected with the cavity 5 in the frame 2, a brake cable 12 is fixed on the piston two 11, the flow passage one 6, the flow passage two 7 and the piston cavity one 8 together form an oil cavity which stores oil.

[0027] As Figure 1 , Figure 5 and Figure 6As shown in the figure, the foot pedal 3 comprises a connecting shaft 13 and a pedal body 14, the connecting shaft 13 is perpendicular to the pedal shaft 4, one end of the connecting shaft 13 is rotationally connected with the pedal shaft 4, the other end of the connecting shaft 13 is damping rotationally connected with the side wall of the pedal body 14, the pedal body 14 and the pedal shaft 4 are located on the same side of the connecting shaft 13, the side of the pedal body 14 is fixed with a push block 15, the piston one 9 corresponds to one end of the push block 15 and forms a gap 16, the size of the gap 16 between the push block 15 and the piston one 9 gradually decreases from one end of the push block 15 to the other end.

[0028] As shown in the figure, Figure 6 the side of the push block 15 is fixedly connected with the pedal body 14 and away from the piston one 9, the other side of the push block 15 corresponds to the piston one 9 and is arc-shaped.

[0029] As shown in the figure, Figure 1 the foot pedal 3 comprises a connecting shaft 13 and a pedal body 14, the connecting shaft 13 is perpendicular to the pedal shaft 4, one end of the connecting shaft 13 is rotationally connected with the pedal shaft 4, the pedal body 14 is damping slidingly connected with the side wall of the other end of the connecting shaft 13 along the length direction of the connecting shaft 13, the pedal body 14 and the pedal shaft 4 are located on the same side of the connecting shaft 13.

[0030] As shown in the figure, Figure 1 , Figure 2 and Figure 3 the bottom of the pedal body 14 is connected with the connecting shaft 13, the top of the pedal body 14 is provided with a foot cover 17, and the foot cover 17 is fixedly connected with the pedal body 14.

[0031] As shown in the figure, Figure 3 the flow channel two 7 is located at one end of the piston cavity one 8, the piston one 9 is located at the other end of the piston cavity one 8, the piston one 9 is provided with a plug body one 18, one side of the plug body one 18 is fixedly connected with the piston one 9, the diameter of the plug body one 18 is greater than the diameter of the piston one 9, the piston one 9 is sealingly and slidingly connected with the piston cavity one 8 through the plug body one 18, the piston cavity one 8 is provided with a spring one 19, the other side of the plug body one 18 is elastically connected with one end of the piston cavity one 8 through the spring one 19.

[0032] As shown in the figure, Figure 3 and Figure 4As shown, the frame 2 comprises a support tube beam 20, the end of the support tube beam 20 is provided with a mounting tube beam 21 which is perpendicular to the support tube beam 20, the outer side wall of the support tube beam 20 is fixedly connected with the mounting tube beam 21 and forms an integral body, the rotating shaft 1 penetrates the inside of the mounting tube beam 21 and is sealingly connected with the mounting tube beam 21 in rotation, the cavity 5 is located between the rotating shaft 1 and the mounting tube beam 21, the end of the rotating shaft 1 is located outside the mounting tube beam 21, the outer side wall of the mounting tube beam 21 is provided with a convex column 22, the convex column 22 is located in the support tube beam 20 and is fixedly connected with the mounting tube beam 21, the convex column 22 is provided with a piston cavity two 23 matched with the piston two 11, one end of the piston cavity two 23 is communicated with the cavity 5, one end of the piston two 11 is located in the piston cavity two 23 and is sealingly connected with the piston cavity two 23 in sliding, the other end of the piston two 11 penetrates the other end of the piston cavity two 23 and is fixedly connected with the brake cable 12.

[0033] As shown in Figure 4 and Figure 7 As shown, the end of the piston two 11 located in the piston cavity two 23 is fixedly connected with a plug body two 24, the diameter of the plug body two 24 is larger than that of the piston two 11, the end of the piston two 11 is sealingly connected with the piston cavity two 23 in sliding through the plug body two 24, the other end of the piston cavity two 23 is provided with a through hole 25 matched with the piston two 11, the support tube beam 20 is provided with a limiting plate 26, the limiting plate 26 is fixedly connected with the inner side wall of the support tube beam 20, the other end of the piston two 11 is provided with a connecting block 27, the piston two 11 is fixedly connected with one end of the connecting block 27 after penetrating the through hole 25 and the limiting plate 26 in sequence, the piston two 11 is connected with the through hole 25 and the limiting plate 26 in sliding respectively, the brake cable 12 is fixedly connected with the other end of the connecting block 27 after penetrating the limiting plate 26, the brake cable 12 is connected with the limiting plate 26 in sliding under the driving of the piston two 11, the piston two 11 is sleeved with a spring two 28, one end of the spring two 28 is connected with the limiting plate 26, the other end of the spring two 28 is connected with the end of the convex column 22.

[0034] As shown in Figure 3 The rotating shaft 1 is sleeved with two oil seals one 29 and two bearings 30, the two oil seals one 29 are located between the two bearings 30, the rotating shaft 1 is sealingly connected with the mounting tube beam 21 through the oil seals one 29, the cavity 5 is located between the two oil seals one 29, the rotating shaft 1 is rotatably connected with the mounting tube beam 21 through the bearings 30. One side of the pedal shaft 4 is close to the frame 2, the other side of the pedal shaft 4 is away from the frame 2, the end of the rotating shaft 1 is sleeved with two oil seals two 31, the rotating shaft 1 is sealingly connected with the inside of the one side of the pedal shaft 4 close to the frame 2 through the two oil seals two 31, the rotating shaft 1 is provided with an oil inlet 32, the oil inlet 32 is located between the two oil seals two 31, the flow channel two 7 is communicated with the flow channel one 6 through the oil inlet 32, the rotating shaft 1 is threadedly connected with a nut 33, the pedal shaft 4 is fixedly connected with the rotating shaft 1 through the nut 33, the nut 33 is located on the side of the pedal shaft 4 away from the frame 2, the pedal shaft 4 is fixedly connected with the rotating shaft 1 through the nut 33.

[0035] In the initial state, the pedal body 14 is away from the piston 9, so that the rider avoids the interference between the pedal body 14 and the piston 9 in the riding state, and the pedal body 14 can rotate and drive the bicycle to move forward. When braking, the rider gradually pushes the piston 9 inward by approaching the piston 9 with the foot and overcoming the elastic action of the spring 19, so that the oil in the oil chamber enters the piston cavity 23 through the oil outlet hole 10 and the cavity 5 in turn and pushes the piston 11 to slide. The piston 11 tightens the brake wire 12, which is extremely simple to operate. In the case of special circumstances, the rider cannot realize braking by pinching the brake handle with the fingers, which improves the safety performance.

[0036] In the initial state, the piston 9 corresponds to one end of the push block 15 with a gap 16, so that the rider avoids the interference between the push block 15 and the piston 9 in the riding state, and the pedal body 14 can rotate and drive the bicycle to move forward. When braking, the rider rotates the pedal body 14 by twisting the foot to drive the pedal body 14 to rotate, so that the push block 15 gradually approaches the piston 9 and pushes the piston 9 to slide inward during rotation. The oil in the oil chamber enters the piston cavity 23 through the oil outlet hole 10 and the cavity 5 in turn under the action of the piston 9 and pushes the piston 11 to slide. The piston 11 tightens the brake wire 12, which is extremely simple to operate. In the case of special circumstances, the rider cannot realize braking by pinching the brake handle with the fingers, which improves the safety performance.

[0037] In the initial state, the pedal body 14 is away from the piston 9, so that the rider avoids the interference between the pedal body 14 and the piston 9 in the riding state, and the pedal body 14 can rotate and drive the bicycle to move forward. When braking, the rider rotates the pedal body 14 by twisting the foot to drive the pedal body 14 to rotate, so that the push block 15 gradually approaches the piston 9 and pushes the piston 9 to slide inward during rotation. The oil in the oil chamber enters the piston cavity 23 through the oil outlet hole 10 and the cavity 5 in turn under the action of the piston 9 and pushes the piston 11 to slide. The piston 11 tightens the brake wire 12, which is extremely simple to operate. In the case of special circumstances, the rider cannot realize braking by pinching the brake handle with the fingers, which improves the safety performance.

[0038] In the above-mentioned embodiment two and embodiment three, in order to facilitate the rider's foot to drive the pedal body 14 to move, a foot cover 17 can be arranged on the pedal body 14.

Claims

1. A bicycle pedal structure, characterized by, The utility model provides a kind of bicycle, including rotating shaft (1), frame (2), footboard (3) and pedal shaft (4), the rotating shaft (1) is rotatably connected with frame (2), the outer wall of the rotating shaft (1) is sealed with the cavity (5) between frame (2), the end of the rotating shaft (1) is located outside frame (2) and is sealed with the one end inside pedal shaft (4) fixed connection, the other end side wall of pedal shaft (4) is rotatably connected with footboard (3), the rotating shaft (1) is equipped with flow passage one (6), pedal shaft (4) is equipped with flow passage two (7), one end of flow passage two (7) is communicated with flow passage one (6), the other end of flow passage two (7) is equipped with piston cavity one (8) communicated with it and perpendicular, piston cavity one (8) is equipped with piston one (9), one end of piston one (9) is elastically connected with one end of piston cavity one (8), the other end of piston one (9) is located outside piston cavity one (8) after penetrating the other end of piston cavity one (8) and is corresponding with footboard (3), the side wall of flow passage one (6) is equipped with oil outlet hole (10) communicated with cavity (5), frame (2) is elastically connected with piston two (11) communicated with cavity (5), brake cable (12) is fixed on piston two (11), flow passage one (6), flow passage two (7) and piston cavity one (8) jointly constitute oil chamber that oil is stored;The footboard (3) includes connecting shaft (13) and pedal body (14), the connecting shaft (13) is perpendicular to pedal shaft (4), one end of the connecting shaft (13) is rotatably connected with pedal shaft (4), and the pedal body (14) and pedal shaft (4) are located on the same side of the connecting shaft (13);The pedal body (14) is dampedly rotatably connected with the other end side wall of the connecting shaft (13) or is dampedly slidably connected along the length direction of the connecting shaft (13), when the pedal body (14) is dampedly rotatably connected with the connecting shaft (13), the side of the pedal body (14) is fixed with push block (15), one end of the push block (15) is corresponding with piston one (9) and forms gap (16), and the gap (16) between the push block (15) and piston one (9) gradually decreases from one end of the push block (15) to the other end thereof.

2. A bicycle pedal structure according to claim 1, wherein The push block (15) is fixedly connected with the pedal body (14) on one side and away from piston one (9), and the other side corresponding to the push block (15) is close to piston one (9) and is arc-shaped.

3. A bicycle pedal structure according to claim 1 or 2, characterised in that, The bottom of the pedal body (14) is connected with the connecting shaft (13), the top of the pedal body (14) is provided with a foot cover (17), and the foot cover (17) is fixedly connected with the pedal body (14).

4. A bicycle pedal structure according to claim 1 or 2, wherein The flow channel two (7) is located at one end of the piston cavity one (8), the piston one (9) is located at the other end of the piston cavity one (8), the piston one (9) is provided with a plug body one (18), one side of the plug body one (18) is fixedly connected with the piston one (9), the diameter of the plug body one (18) is larger than that of the piston one (9), the piston one (9) is sealingly and slidably connected with the piston cavity one (8) through the plug body one (18), the piston cavity one (8) is provided with a spring one (19), the other side of the plug body one (18) is elastically connected with one end of the piston cavity one (8) through the spring one (19).

5. A bicycle pedal structure according to claim 1 or 2, wherein The frame (2) comprises a support pipe beam (20), the end of the support pipe beam (20) is provided with a mounting pipe beam (21) perpendicular to the support pipe beam (20), the outer side wall of the support pipe beam (20) and the mounting pipe beam (21) is fixedly connected and integrated, the rotating shaft (1) penetrates the inside of the mounting pipe beam (21) and is sealingly and rotatably connected with the mounting pipe beam (21), the cavity (5) is located between the rotating shaft (1) and the mounting pipe beam (21), the end of the rotating shaft (1) is located outside the mounting pipe beam (21), the outer side wall of the mounting pipe beam (21) is provided with a convex column (22), the convex column (22) is located in the support pipe beam (20) and is fixedly connected with the mounting pipe beam (21), the convex column (22) is provided with a piston cavity two (23) matched with the piston two (11), one end of the piston cavity two (23) is communicated with the cavity (5), one end of the piston two (11) is located in the piston cavity two (23) and is sealingly and slidably connected with the piston cavity two (23), the other end of the piston two (11) penetrates the other end of the piston cavity two (23) and is fixedly connected with the brake cable (12).

6. A bicycle pedal structure according to claim 5, wherein The piston two (11) is fixedly connected with a plug body two (24) at one end located in the piston cavity two (23), the diameter of the plug body two (24) is larger than that of the piston two (11), one end of the piston two (11) is sealingly and slidably connected with the piston cavity two (23) through the plug body two (24), the other end of the piston cavity two (23) is provided with a through hole (25) matched with the piston two (11), the support pipe beam (20) is provided with a limiting plate (26), the limiting plate (26) is fixedly connected with the inner side wall of the support pipe beam (20), the other end of the piston two (11) is provided with a connecting block (27), the piston two (11) is fixedly connected with one end of the connecting block (27) after penetrating the through hole (25) and the limiting plate (26) in sequence, the piston two (11) is slidably connected with the through hole (25) and the limiting plate (26) respectively, the brake cable (12) is fixedly connected with the other end of the connecting block (27) after penetrating the limiting plate (26), the brake cable (12) is slidably connected with the limiting plate (26) under the drive of the piston two (11), the piston two (11) is sleeved with a spring two (28), one end of the spring two (28) is connected with the limiting plate (26), the other end of the spring two (28) is connected with the end of the convex column (22).

7. A bicycle pedal structure according to claim 5, wherein Two oil seals one (29) and two bearings (30) are sleeved on the rotating shaft (1), the two oil seals one (29) are located between the two bearings (30), the rotating shaft (1) is sealed and connected with the mounting pipe beam (21) through the oil seal one (29), the cavity (5) is located between the two oil seals one (29), and the rotating shaft (1) is rotationally connected with the mounting pipe beam (21) through the bearing (30).

8. A bicycle pedal structure according to claim 1 or 2, wherein One side of the pedal shaft (4) is close to the frame (2), the other side of the pedal shaft (4) is away from the frame (2), the end of the rotating shaft (1) is sleeved with two oil seals two (31), the rotating shaft (1) is sealed and connected with the inside of the one side of the pedal shaft (4) close to the frame (2) through the two oil seals two (31), the rotating shaft (1) is provided with an oil inlet (32), the oil inlet (32) is located between the two oil seals two (31), the flow channel two (7) is communicated with the flow channel one (6) through the oil inlet (32), the rotating shaft (1) is screwedly connected with a nut (33), the pedal shaft (4) is fixedly connected with the rotating shaft (1) through the nut (33), the nut (33) is located on the side of the pedal shaft (4) away from the frame (2), and the pedal shaft (4) is fixedly connected with the rotating shaft (1) through the nut (33).

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