Coaxial type electric power-assisted bicycle

Abstract

The invention relates to the technical field of electric power-assisted bicycles, in particular to a coaxial electric power-assisted bicycle which comprises a mounting supporting structure and a driving control structure, and the lower end of the mounting supporting structure is used for limiting the driving control structure. The mounting supporting structure comprises a butt joint fixing block, a butt joint fixing plate, a fixing arc frame, a connecting guide frame, a stepping motor, a mounting matching seat, a reinforcing side block, a reinforcing inclined rod and a fixing frame block, the lower end of the butt joint fixing plate is fixedly connected with the fixing frame block, and the side end of the fixing frame block is fixedly connected with the butt joint fixing block; the lower end of the fixing frame block is fixedly connected with a fixing arc frame, the side portion of the lower end of the fixing arc frame is fixedly connected with a reinforcing side block, and the reinforcing side block is fixedly connected with the fixing frame block through a reinforcing inclined rod. And through the arrangement of the mounting supporting structure and the driving control structure, the control work of the electric power-assisted bicycle is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of electric power-assisted bicycles, in particular to a coaxial electric power-assisted bicycle. Background Art

[0002] The power-assisted bicycle is a new type of two-wheeled vehicle, a type of bicycle. It uses a battery as an auxiliary power source, is equipped with a motor, and has a power assist system. It is a means of transportation that can integrate human riding and motor assistance.

[0003] According to Chinese patent publication number CN2051612U, a coaxial electric power-assisted bicycle is a novel electric bicycle, the driving device of which is mainly composed of a hollow shaft motor, a planetary gear, a driving gear, a planetary gear frame, a ratchet clutch, a gear ring and a housing, or a hollow shaft motor, an eccentric wheel, a gear with a small tooth difference, a gear ring, a ratchet clutch and a housing, and a pin shaft frame. The driving device is completely installed at the rear wheel of the bicycle, and the power of the motor is coaxially transmitted to the rear wheel of the bicycle by a two-stage planetary gear reduction method or a gear reduction method with a small tooth difference. Therefore, this device is small in size, light in weight, and has high transmission efficiency. The body load-bearing structure is novel in concept and beautiful in appearance. The user can also drive it with manpower like riding an ordinary bicycle.

[0004] At present, the existing coaxial electric power-assisted bicycles and the above-mentioned cases are not convenient for the purpose of efficient coordination when in use, and cannot better integrate power to better ensure the smooth operation of the coaxial electric power-assisted bicycles. Therefore, improvements are made to the above-mentioned problems. Summary of the invention

[0005] In view of the problems in the prior art, the present invention provides a coaxial electric power-assisted bicycle.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a coaxial electric power-assisted bicycle, including a mounting support structure and a driving control structure, the lower end of the mounting support structure is used for limiting the driving control structure, the mounting support structure includes a docking fixing block, a docking fixing plate, a fixed arc frame, a connecting guide frame, a stepping motor, an installation matching seat, a reinforcing side block, a reinforcing diagonal rod and a fixed frame block, the lower end of the docking fixing plate is fixedly connected to the fixed frame block, the side end of the fixed frame block is fixedly connected to the docking fixing block, the lower end of the fixed frame block is fixedly connected to the fixed arc frame, the lower end side of the fixed arc frame is fixedly connected to the reinforcing side block, the reinforcing side block is fixedly connected to the fixed frame block through the reinforcing diagonal rod, the front end of the fixed arc frame is fixedly connected to the connecting guide frame, and the connecting guide frame is symmetrically arranged with respect to the fixed arc frame, and the connecting guide frame at the rear end position is fixedly connected to the fixed frame. The guide frame is fixedly connected with an installation matching seat, and a stepper motor is installed at the center of the installation matching seat. Through the structural setting of the installation support structure, it can play a supporting function. The upper end of the fixed frame block is provided with a docking fixing block and a docking fixing plate, which are fixed to the frame through the docking fixing block and the docking fixing plate to realize the supporting work. The fixed frame block is fixed to the reinforcing side block through the reinforcing diagonal rod, and the reinforcing side block is fixed to the fixed arc frame. The upper end of the fixed arc frame is fixed to the fixed frame block, which can perform efficient supporting work of the fixed arc frame. At the same time, a connecting guide frame is provided on the fixed arc frame, which can be connected to the driving control structure through the connecting guide frame to realize the limit mounting rod of the driving control structure. At the same time, a stepper motor is installed on the connecting guide frame at the rear end position through the installation matching seat. Through the setting of the stepper motor, driving work can be performed, thereby assisting the driving travel function;

[0007] The drive control structure includes a first protective ring, a drive control rod, a matching gear ring, a second protective ring and a drive connecting component. The front end of the drive connecting component is fixedly connected to the second protective ring, the front end of the second protective ring is fixedly connected to the matching gear ring, the front end of the matching gear ring is fixedly connected to the first protective ring, and the center limit of the first protective ring is provided with a drive control rod.

[0008] Specifically, the driving connection component includes a reduction fitting mechanism, a bearing docking ring, a matching transmission mechanism and a wheel hub matching mechanism. The front end of the wheel hub matching mechanism is meshed with a matching transmission mechanism, and the front end of the matching transmission mechanism is fixedly connected with a reduction fitting mechanism. The reduction fitting mechanism, the matching transmission mechanism and the wheel hub matching mechanism are arranged to rotate relative to each other, and the front end of the reduction fitting mechanism is provided with a bearing docking ring.

[0009] Specifically, the bearing docking ring is rotatably connected to the second protective ring, the front end of the speed reduction fitting mechanism is limitedly connected to the connecting guide frame, and the docking fixing block and the docking fixing plate are fixedly connected to the frame.

[0010] Specifically, the deceleration matching mechanism includes a fixed protrusion, a buffer pressure rod, a docking coupling, a reinforcement side frame, a docking cross block and an adaptation ring. The fixed protrusion is provided with a buffer pressure rod, and the buffer pressure rod is limited by a connecting guide frame. The fixed protrusion is fixedly connected to a reinforcement side frame, and the side end of the reinforcement side frame is fixedly connected to a docking cross block. The side end of the docking cross block is installed with an adaptation ring. The fixed protrusion is also provided with a docking coupling, and the docking coupling is docked and fixed with the matching transmission mechanism.

[0011] Specifically, the mating transmission mechanism includes a first gear, a docking support rod and a bearing connecting ring, the bearing connecting ring is fixedly provided with a docking support rod, the docking support rod is rotatably connected with the first gear, the docking connecting shaft is fixedly connected to the docking support rod, the bearing connecting ring is sleeved with the wheel hub mating mechanism, and the adapter ring is also sleeved with the wheel hub mating mechanism.

[0012] Specifically, the wheel hub matching mechanism includes a wheel hub, a connecting rib, a counterweight, a rotation control disk, a docking connecting rod, a power rod, a second gear, a rotating gear ring and a cooperative disk, the power rod is drivingly connected to the second gear, the second gear is provided with a rotating gear ring, the rotating gear ring is fixedly connected to the cooperative disk, the cooperative disk is fixedly connected to the docking connecting rod, the docking connecting rod is fixedly connected to the rotation control disk, the rotation control disk is fixedly connected to the connecting rib, the connecting rib is fixedly connected to the wheel hub, and through the structural setting of the drive control structure, the stepping motor is connected to the power rod through the drive rod, so as to control the second gear The wheel rotates, and the second gear can drive the first gear to rotate by meshing with the first gear. The upper end of the first gear is meshed and connected with the rotating gear ring, so as to control the rotation of the rotating gear ring. The rotating gear ring can control the rotation of the wheel hub and the connecting rib through the docking connecting rod, the cooperative disk, and the rotating control disk to achieve the driving purpose. At the same time, the matching gear ring is connected to the gear at the pedal through a toothed belt, which can drive the matching gear ring to rotate. The matching gear ring drives the first protective ring and the fixed arc frame to rotate, and the driving control rod can also control the rotation of the power rod and the second gear, so that they can cooperate and use the stepper motor to assist in driving.

[0013] Specifically, a counterweight block is provided at the center of the wheel hub, a front end of the counterweight block is fixedly connected to a rotating control disk, and the first gear is provided between the second gear and the rotating gear ring.

[0014] Specifically, the front end of the power rod is fixedly connected to the driving control rod, the adapting ring is sleeved with the power rod, and the bearing connecting ring is also sleeved with the power rod.

[0015] Specifically, the second gear is meshed and connected with the rotating gear ring through the first gear, the rotating gear ring is fixed with the rotating control disk through the cooperation disk, the docking connecting rod and the rotating control disk, and the bearing docking ring and the fixed protrusion are arranged to rotate relative to each other.

[0016] Specifically, the driving rod on the stepping motor is connected to the power rod, and the driving rod rotates relative to the counterweight block, and the driving rod does not directly drive the wheel hub and the counterweight block.

[0017] Beneficial effects of the present invention:

[0018] First, the present invention can play a supporting function through the structural setting of installing the supporting structure. The upper end of the fixed frame block is provided with a docking fixing block and a docking fixing plate, which are fixed to the frame through the docking fixing block and the docking fixing plate to realize the supporting work. The fixed frame block is fixed to the reinforced side block through the reinforcing diagonal rod, and the reinforced side block is fixed to the fixed arc frame. The upper end of the fixed arc frame is fixed to the fixed frame block, which can perform efficient supporting work of the fixed arc frame. At the same time, a connecting guide frame is provided on the fixed arc frame, which can be connected to the driving control structure through the connecting guide frame to realize the limit mounting rod of the driving control structure. At the same time, a stepping motor is installed on the connecting guide frame at the rear end position through the mounting seat. Through the setting of the stepping motor, driving work can be performed, thereby assisting the driving travel function.

[0019] Second, the present invention has a structural setting of a driving control structure. The stepper motor is connected to the power rod through a driving rod, and can control the rotation of the second gear. The second gear can drive the first gear to rotate by meshing with the first gear. The upper end of the first gear is meshed and connected with the rotating gear ring, thereby controlling the rotation of the rotating gear ring. The rotating gear ring can control the rotation of the wheel hub and the connecting ribs through the docking connecting rod, the cooperative disk, and the rotating control disk to achieve the driving purpose. At the same time, the matching gear ring is connected to the gear at the pedal through a toothed belt, and can drive the matching gear ring to rotate. The matching gear ring drives the first protective ring and the fixed arc frame to rotate, and the rotation of the power rod and the second gear can also be controlled by the driving control rod, so that the stepper motor can be used to assist the driving work, better integrate the power, and thus better ensure the smooth operation of the coaxial electric power-assisted bicycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the main body of the present invention from the front perspective;

[0022] Figure 2 It is a schematic diagram of the three-dimensional structure of the main body of the present invention from a side perspective;

[0023] Figure 3 It is a schematic diagram of the three-dimensional structure of the main body of the present invention from a rear perspective;

[0024] Figure 4 A schematic diagram of a three-dimensional structure from a front perspective of the mounting support structure of the present invention;

[0025] Figure 5 It is a three-dimensional diagram of the driving control structure of the present invention;

[0026] Figure 6 It is a split diagram of the drive control structure in the present invention;

[0027] Figure 7 This is a disassembled diagram of the driving connection component in the present invention;

[0028] Figure 8 It is a three-dimensional diagram of the speed reduction matching mechanism in the present invention;

[0029] Fig. 9 It is a three-dimensional diagram of the transmission mechanism of the present invention;

[0030] Fig.10 It is a stereoscopic diagram of the wheel hub matching mechanism in the present invention.

[0031] In the figure: 1-installation support structure, 2-drive control structure, 3-docking fixed block, 4-docking fixed plate, 5-fixed arc frame, 6-connection guide frame, 7-stepping motor, 8-installation matching seat, 9-reinforcement side block, 10-reinforcement diagonal rod, 11-fixed frame block, 12-first protection ring, 13-drive control rod, 14-matching gear ring, 15-second protection ring, 16-drive connection component, 18-deceleration matching mechanism, 19-bearing docking ring, 20-matching Combined transmission mechanism, 21-wheel hub matching mechanism, 22-fixed protrusion, 23-buffered hydraulic rod, 24-docking coupling, 25-reinforced side frame, 26-docking cross block, 27-adapting ring, 28-first gear, 29-docking support rod, 30-bearing connecting ring, 31-wheel hub, 32-connecting rib, 33-counterweight, 34-rotating control disk, 35-docking connecting rod, 36-power rod, 37-second gear, 38-rotating gear ring, 39-cooperative disk. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0033] The present invention is further described below in conjunction with the accompanying drawings.

[0034] Example

[0035] like Figure 1-10As shown, a coaxial electric power-assisted bicycle of the present invention comprises an installation support structure 1 and a driving control structure 2, the lower end of the installation support structure 1 is used for limiting the driving control structure 2, the installation support structure 1 comprises a docking fixing block 3, a docking fixing plate 4, a fixed arc frame 5, a connecting guide frame 6, a stepping motor 7, an installation matching seat 8, a reinforcing side block 9, a reinforcing diagonal rod 10 and a fixed frame block 11, the lower end of the docking fixing plate 4 is fixedly connected with the fixed frame block 11, the side end of the fixed frame block 11 is fixedly connected with the docking fixing block 3, the lower end of the fixed frame block 11 is fixedly connected with the fixed arc frame 5, the lower end side of the fixed arc frame 5 is fixedly connected with the reinforcing side block 9, the reinforcing side block 9 is fixedly connected to the fixed frame block 11 through the reinforcing diagonal rod 10, the front end of the fixed arc frame 5 is fixedly connected with the connecting guide frame 6, and the connecting guide frame 6 is symmetrically arranged with respect to the fixed arc frame 5, the connecting guide frame 6 at the rear end position is fixedly connected with the installation matching seat 8, and the center of the installation matching seat 8 is installed with the stepping motor 7;

[0036] The drive control structure 2 includes a first protective ring 12, a drive control rod 13, a matching gear ring 14, a second protective ring 15 and a drive connecting component 16. The front end of the drive connecting component 16 is fixedly connected to the second protective ring 15. The front end of the second protective ring 15 is fixedly connected to the matching gear ring 14. The front end of the matching gear ring 14 is fixedly connected to the first protective ring 12. The center limit of the first protective ring 12 is provided with a drive control rod 13.

[0037] The driving connection component 16 includes a reduction fitting mechanism 18, a bearing docking ring 19, a matching transmission mechanism 20 and a hub matching mechanism 21. The front end of the hub matching mechanism 21 is meshed with the matching transmission mechanism 20. The front end of the matching transmission mechanism 20 is fixedly connected with the reduction fitting mechanism 18. The reduction fitting mechanism 18, the matching transmission mechanism 20 and the hub matching mechanism 21 are arranged to rotate relative to each other. The front end of the reduction fitting mechanism 18 is provided with a bearing docking ring 19.

[0038] The bearing docking ring 19 is rotatably connected to the second protection ring 15, the front end of the speed reduction matching mechanism 18 is limitedly connected to the connecting guide frame 6, and the docking fixing block 3 and the docking fixing plate 4 are fixedly connected to the frame.

[0039] The deceleration matching mechanism 18 includes a fixed protrusion 22, a buffer hydraulic rod 23, a docking coupling 24, a reinforcement side frame 25, a docking cross block 26 and an adaptation ring 27. The fixed protrusion 22 is provided with a buffer hydraulic rod 23, and the buffer hydraulic rod 23 is limitedly set with the connecting guide frame 6. The fixed protrusion 22 is fixedly connected with a reinforcement side frame 25, and the side end of the reinforcement side frame 25 is fixedly connected with a docking cross block 26. The side end of the docking cross block 26 is installed with an adaptation ring 27. The fixed protrusion 22 is also provided with a docking coupling 24, and the docking coupling 24 is fixedly arranged with the matching transmission mechanism 20.

[0040] The matching transmission mechanism 20 includes a first gear 28, a docking support rod 29 and a bearing connecting ring 30. The bearing connecting ring 30 is fixedly provided with a docking support rod 29, and the first gear 28 is rotatably connected to the docking support rod 29. The docking shaft 24 is fixedly connected to the docking support rod 29. The bearing connecting ring 30 is sleeved with the hub matching mechanism 21, and the adapter ring 27 is also sleeved with the hub matching mechanism 21. The stepper motor 7 can also be driven. The stepper motor 7 can assist the power rod 36 to rotate through the driving rod, thereby reducing the output of the personnel. The wheel hub 31 is also driven to rotate. The first gear 28 is limited by the docking support rod 29. At the same time, the lower end of the docking support rod 29 is sleeved with the power rod 36 through the bearing connecting ring 30. The power rod 36 rotates on the bearing connecting ring 30, and the shaft The bearing connecting ring 30 is fixed to the docking coupling 24, and at the same time, the docking coupling 24 is limitedly connected to the mounting support structure 1 through the fixed protrusion 22 and the buffer hydraulic rod 23 to keep the position constant and not rotate. The adapting ring 27 is also sleeved with the power rod 36, so that the fixed protrusion 22 and the power rod 36 are relatively rotatable, and the lower end of the connecting guide frame 6 is rotatably set with the driving control rod 13, and the driving control rod 13 rotates at the lower end of the connecting guide frame 6, and the supporting work is performed through the connecting guide frame 6. The mounting support structure 1 is fixed to the external frame through the docking fixing block 3 and the docking fixing plate 4 to achieve the supporting work. At the same time, the fixed arc frame 5, the connecting guide frame 6, the reinforced side block 9, the strengthened diagonal rod 10, and the fixed frame block 11 can play a protective limiting role to ensure efficient supporting and protection capabilities.

[0041] The hub matching mechanism 21 includes a hub 31, a connecting rib 32, a counterweight 33, a rotating control disk 34, a docking connecting rod 35, a power rod 36, a second gear 37, a rotating gear ring 38 and a cooperative disk 39. The power rod 36 is drivingly connected to the second gear 37, the second gear 37 is provided with a rotating gear ring 38, the rotating gear ring 38 is fixedly connected to the cooperative disk 39, the cooperative disk 39 is fixedly connected to the docking connecting rod 35, the docking connecting rod 35 is fixedly connected to the rotating control disk 34, the rotating control disk 34 is fixedly connected to the connecting rib 32, the connecting rib 32 is fixedly connected to the hub 31, and the matching gear ring 14 can be driven to rotate through the toothed belt. The matching gear ring 14 is fixed to the first protective ring 12 and the second protective ring 15, so that the first protective ring 12 and the second protective ring 15 rotate synchronously, and the first protective ring 12 and the second protective ring 15 rotate synchronously. A driving control rod 13 is provided at the center of a protective ring 12. When the first protective ring 12 rotates, it can drive the driving control rod 13 to rotate accordingly. The rear end of the driving control rod 13 is fixed to the power rod 36, which can drive the power rod 36 to rotate. The power rod 36 drives the second gear 37 to rotate in coordination. The second gear 37 can drive the rotating gear ring 38 to rotate through the meshing first gear 28, so that the rotating gear ring 38 rotates around the power rod 36. When the rotating gear ring 38 rotates, it drives the cooperative disk 39 to follow the movement, and the cooperative disk 39 is fixed to the rotating control disk 34 through the docking connecting rod 35, thereby driving the rotating control disk 34 to cooperate with the movement. The rotating control disk 34 is fixed to the wheel hub 31 through the connecting rib 32, which can drive the wheel hub 31 to rotate, thereby performing driving work.

[0042] A counterweight block 33 is provided at the center of the wheel hub 31 , and the front end of the counterweight block 33 is fixedly connected to the rotating control disk 34 . The first gear 28 is provided between the second gear 37 and the rotating gear ring 38 .

[0043] The front end of the power rod 36 is fixedly connected to the driving control rod 13 , the adapting ring 27 is sleeved with the power rod 36 , and the bearing connecting ring 30 is also sleeved with the power rod 36 .

[0044] The second gear 37 is meshedly connected with the rotating gear ring 38 through the first gear 28 . The rotating gear ring 38 is fixed to the rotating control disk 34 through the cooperative disk 39 and the docking connecting rod 35 . The bearing docking ring 19 and the fixed protrusion 22 are arranged to rotate relative to each other.

[0045] The driving rod on the stepping motor 7 is connected to the power rod 36 , and the driving rod rotates relative to the counterweight 33 , and the driving rod does not directly drive the wheel hub 31 and the counterweight 33 .

[0046] The working principle is as follows: when in use, the toothed belt is meshed and connected with the matching toothed ring 14 through the setting of the external toothed belt, and the toothed disk at the pedal position can be driven to rotate by the foot of the person, so that the matching toothed ring 14 can be driven to rotate through the toothed belt, and the matching toothed ring 14 is fixed to the first protection ring 12 and the second protection ring 15, so that the first protection ring 12 and the second protection ring 15 rotate synchronously, and a driving control rod 13 is provided at the center of the first protection ring 12. When the first protection ring 12 rotates, it can drive the driving control rod 13 to rotate accordingly, and the rear end of the driving control rod 13 is fixed to the power rod 36, which can drive the dynamic The power rod 36 rotates, and the power rod 36 drives the second gear 37 to rotate in coordination. The second gear 37 can drive the rotating gear ring 38 to rotate through the meshing first gear 28, so that the rotating gear ring 38 rotates around the power rod 36. When the rotating gear ring 38 rotates, the cooperative disk 39 is driven to follow the movement, and the cooperative disk 39 is fixed to the rotating control disk 34 through the docking connecting rod 35, thereby driving the rotating control disk 34 to cooperate with the movement. The rotating control disk 34 is fixed to the wheel hub 31 through the connecting rib 32, which can drive the wheel hub 31 to rotate, thereby performing driving work. At the same time, during operation, At this time, the stepper motor 7 can also be driven. The stepper motor 7 can assist the power rod 36 to rotate through the driving rod, thereby reducing the output of personnel. Similarly, the wheel hub 31 is driven to rotate. The first gear 28 is limited by the docking support rod 29. At the same time, the lower end of the docking support rod 29 is sleeved with the power rod 36 through the bearing connecting ring 30. The power rod 36 rotates on the bearing connecting ring 30. The bearing connecting ring 30 is fixed to the docking shaft 24. At the same time, the docking shaft 24 is limited and connected to the mounting support structure 1 through the fixed protrusion 22 and the buffer hydraulic rod 23 to keep the position constant without rotating. The adapting ring 27 is also sleeved with the power rod 36, so that the fixed protrusion 22 and the power rod 36 are relatively rotatable, and the lower end of the connecting guide frame 6 is rotatably arranged with the driving control rod 13, and the driving control rod 13 rotates at the lower end of the connecting guide frame 6, and the supporting work is performed through the connecting guide frame 6. The supporting structure 1 is installed and fixed to the external frame through the docking fixing block 3 and the docking fixing plate 4 to achieve the supporting work. At the same time, the fixed arc frame 5, the connecting guide frame 6, the reinforced side block 9, the strengthened diagonal rod 10, and the fixed frame block 11 can play a protective limit work to ensure efficient support and protection capabilities and complete the work.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A coaxial electric power-assisted bicycle, characterized in that: The invention comprises an installation support structure (1) and a drive control structure (2), wherein the lower end of the installation support structure (1) is used for limiting the position of the drive control structure (2), and the installation support structure (1) comprises a docking fixing block (3), a docking fixing plate (4), a fixed arc frame (5), a connecting guide frame (6), a stepping motor (7), an installation matching seat (8), a reinforcement side block (9), a reinforcement diagonal rod (10) and a fixed frame block (11), wherein the lower end of the docking fixing plate (4) is fixedly connected to the fixed frame block (11), and the side end of the fixed frame block (11) is fixedly connected to the docking fixing plate (4). The fixed frame block (3) is fixedly connected to a fixed arc frame (5) at the lower end of the fixed arc frame (5), and a reinforcing side block (9) is fixedly connected to the lower end side of the fixed arc frame (5). The reinforcing side block (9) is fixedly connected to the fixed frame block (11) via a reinforcing diagonal rod (10). The front end of the fixed arc frame (5) is fixedly connected to a connecting guide frame (6), and the connecting guide frame (6) is symmetrically arranged with respect to the fixed arc frame (5). The connecting guide frame (6) at the rear end position is fixedly connected to a mounting seat (8), and a stepping motor (7) is installed at the center of the mounting seat (8); The drive control structure (2) comprises a first protective ring (12), a drive control rod (13), a matching toothed ring (14), a second protective ring (15) and a drive connection component (16); the front end of the drive connection component (16) is fixedly connected to the second protective ring (15); the front end of the second protective ring (15) is fixedly connected to the matching toothed ring (14); the front end of the matching toothed ring (14) is fixedly connected to the first protective ring (12); and the center of the first protective ring (12) is limited by a drive control rod (13).

2. A coaxial electric power-assisted bicycle according to claim 1, characterized in that: The driving connection component (16) comprises a speed reduction fitting mechanism (18), a bearing docking ring (19), a matching transmission mechanism (20) and a wheel hub fitting mechanism (21); the front end of the wheel hub fitting mechanism (21) is meshed with a matching transmission mechanism (20); the front end of the matching transmission mechanism (20) is fixedly connected with the speed reduction fitting mechanism (18); the speed reduction fitting mechanism (18), the matching transmission mechanism (20) and the wheel hub fitting mechanism (21) are arranged to rotate relative to each other; the front end of the speed reduction fitting mechanism (18) is provided with a bearing docking ring (19).

3. A coaxial electric power-assisted bicycle according to claim 2, characterized in that: The bearing docking ring (19) is rotatably connected to the second protection ring (15), the front end of the speed reduction matching mechanism (18) is position-limitingly connected to the connecting guide frame (6), and the docking fixing block (3) and the docking fixing plate (4) are fixedly connected to the vehicle frame.

4. A coaxial electric power-assisted bicycle according to claim 3, characterized in that: The deceleration matching mechanism (18) comprises a fixed protrusion (22), a buffer hydraulic rod (23), a docking coupling (24), a reinforcement side frame (25), a docking cross block (26) and an adaption sleeve (27). The fixed protrusion (22) is provided with a buffer hydraulic rod (23), the buffer hydraulic rod (23) and the connecting guide frame (6) are limitedly arranged, the fixed protrusion (22) is fixedly connected with a reinforcement side frame (25), the side end of the reinforcement side frame (25) is fixedly connected with a docking cross block (26), the side end of the docking cross block (26) is installed with an adaption sleeve (27), the fixed protrusion (22) is also provided with a docking coupling (24), and the docking coupling (24) is docked and fixedly arranged with the matching transmission mechanism (20).

5. The coaxial electric power-assisted bicycle according to claim 4, characterized in that: The matching transmission mechanism (20) comprises a first gear (28), a docking support rod (29) and a bearing connecting ring (30); the bearing connecting ring (30) is fixedly provided with a docking support rod (29); the first gear (28) is rotatably connected to the docking support rod (29); the docking connecting shaft (24) is fixedly connected to the docking support rod (29); the bearing connecting ring (30) is sleeved with the wheel hub matching mechanism (21); and the adapting ring (27) is also sleeved with the wheel hub matching mechanism (21).

6. A coaxial electric power-assisted bicycle according to claim 5, characterized in that: The wheel hub matching mechanism (21) comprises a wheel hub (31), a connecting rib (32), a counterweight (33), a rotating control disk (34), a docking connecting rod (35), a power rod (36), a second gear (37), a rotating gear ring (38) and a cooperative disk (39); the power rod (36) is drivingly connected to the second gear (37); the second gear (37) is provided with a rotating gear ring (38); the rotating gear ring (38) is fixedly connected to the cooperative disk (39); the docking connecting rod (35) is fixedly connected to the cooperative disk (39); the docking connecting rod (35) is fixedly connected to the rotating control disk (34); the rotating control disk (34) is fixedly connected to the connecting rib (32); and the wheel hub (31) is fixedly connected to the connecting rib (32).

7. A coaxial electric power-assisted bicycle according to claim 6, characterized in that: A counterweight (33) is provided at the center of the wheel hub (31), the front end of the counterweight (33) is fixedly connected to a rotating control disk (34), and the first gear (28) is provided between the second gear (37) and the rotating gear ring (38).

8. The coaxial electric power-assisted bicycle according to claim 7, characterized in that: The front end of the power rod (36) is fixedly connected to the driving control rod (13), the adapting ring (27) is sleeved with the power rod (36), and the bearing connecting ring (30) is also sleeved with the power rod (36).

9. A coaxial electric power-assisted bicycle according to claim 8, characterized in that: The second gear (37) is meshedly connected with the rotating gear ring (38) through the first gear (28); the rotating gear ring (38) is fixed to the rotating control disk (34) through the cooperative disk (39) and the docking connecting rod (35); and the bearing docking ring (19) and the fixed protrusion (22) are arranged to rotate relative to each other.

10. The coaxial electric power-assisted bicycle according to claim 9, characterized in that: The driving rod on the stepping motor (7) is connected to the power rod (36), and the driving rod rotates relative to the counterweight (33), and the driving rod does not directly drive the wheel hub (31) and the counterweight (33).

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