Driver for derailleur in vehicle

Abstract

The utility model relates to a driver for a derailleur in a vehicle. Comprising a bicycle frame, a handlebar connected to the bicycle frame, a front wheel and a rear wheel which are rotationally connected to the bicycle frame, a crank pedal assembly rotationally connected to the bicycle frame, a fluted disc in transmission connection to the crank pedal assembly, a flywheel in transmission connection with the fluted disc through a chain, and a derailleur acting on the chain to enable the chain to conduct position switching on the flywheel. A hub assembly is arranged between the frame and the front wheel or / and the rear wheel, the hub assembly is provided with a through hole, a chain shifting electric driver is arranged in the through hole, and the chain shifting electric driver is in transmission fit with the derailleur through a speed change cable. By means of the existing structure and installation position characteristics of a vehicle, a matched chain shifting electric driver is researched and developed, a cylinder shaft in a hub assembly of an original rear wheel is detached to replace the installation of the chain shifting electric driver to act as a chain shifting device, and an original mechanical speed change system is modified into an electronic speed change system.

Description

Technical Field

[0001] The utility model relates to the field of bicycle speed change devices, in particular to a driver for a derailleur in a vehicle. Background Art

[0002] In recent years, the bicycle market has been booming. Whether it is a high-end bicycle for competition or a popular bicycle for leisure and entertainment, it is popular among consumers, prompting manufacturers to pay more attention to users' needs for bicycle functions and continuously improve the body materials and equipment functions. Generally speaking, a transmission system is often configured on a bicycle so that the bicycle can move the chain to different toothed discs through the transmission according to the terrain and user needs to match different gear ratios. The transmission includes a front transmission and a rear transmission, wherein the rear transmission can be set on the bicycle frame to control the position of the chain hanging on the flywheel. With different frame structures or speed change lines, bicycles can be used with different rear transmissions. In addition, the speed change system is divided into a mechanical speed change system and an electronic speed change system. The mechanical speed change system uses a speed change lever with a transmission line to switch the gears of the front and rear transmissions. The electronic speed change system uses a speed change button with a speed change control circuit to switch the gears of the front and rear transmissions. Since the sensitivity and accuracy of the electronic transmission system are better than those of the mechanical transmission system, and the control feel of the electronic transmission system is also lighter and more direct, the electronic transmission system has become the development trend of the current bicycle market.

[0003] Technical Example 1 shows a traditional mechanical transmission system. Referring to patent document CN207773365U, a bicycle derailleur mounting structure and a bicycle are disclosed. The bicycle derailleur mounting structure includes a frame, a hub shaft straddling between a first rear fork and a second rear fork of the frame, a first sprocket rotatably connected to the middle of the frame, a hub shell mounted on the hub shaft and rotatably connected to the hub shaft, a flywheel assembly mounted on the hub shell, a derailleur, and a chain mounted on the first sprocket, the flywheel assembly and the derailleur. The derailleur is mounted on the first rear fork, and the tensioning unit is located between the hub shell and the first rear fork. When the frame is in an upright state, the tensioning unit is located below the horizontal plane passing through the axis of the hub shaft, and the tensioning unit is located between the vertical plane passing through the axis of the hub shaft and the vertical plane passing through the axis of the first sprocket. And a bicycle including the bicycle derailleur mounting structure.

[0004] As the technology of electronic speed change system gradually matures, electronic speed change system has been widely sought after in recent years. The battery of electronic derailleur on the market is generally installed on the base member, or the battery of electronic derailleur is installed on the inner and outer connecting rods, or the battery of electronic derailleur is installed on other places of the bicycle frame, so as to leave enough space for the inner and outer connecting rods of the electronic derailleur to install the tension spring.

[0005] To this end, technical example 2 has emerged. Referring to patent document CN219339651U, a rear derailleur and a speed-changing bicycle are disclosed, wherein the rear derailleur comprises a base member, a P joint member, a chain guide member, and a base member for connecting to a bicycle frame; the P joint member is connected to the base member via an articulated quadrilateral member; the P joint member is rotatably disposed at one end of the chain guide member; the articulated quadrilateral member comprises an inner link, an outer link and an elastic reset member, and the two ends of the outer link are rotatably disposed on the base member and the P joint member, respectively, wherein the outer link is arranged opposite to the inner link in the articulated quadrilateral; the two ends of the inner link are rotatably disposed on the base member and the P joint member, respectively; the elastic reset member is respectively connected to the outer sides of the inner link and the outer link and is in a stretched state, and is used to generate a reset pulling force on the inner link and the outer link. The embodiment of the utility model effectively improves the structural compactness of the rear derailleur.

[0006] Example 3, which is similar to Example 2, refers to patent document CN208630797U, which discloses a transmission assembly including a connecting member, a power module, a connecting rod and a driving module. The power module includes a seat and a battery assembly, and the battery assembly is disposed on the seat. The connecting rod is pivoted to a place of the connecting member with a first pivot, and the connecting rod is pivoted to a place of the seat with a second pivot. The driving module includes a housing and a motor. The housing is pivoted to another place of the connecting member with a third pivot, and the housing is pivoted to another place of the seat with a fourth pivot. The motor is disposed in the housing, and the motor is electrically connected to the battery assembly.

[0007] Both Example 2 and Example 3 show the structural scheme of the electronic speed change system, but during the test and use, the applicant found that they have common defects, such as: 1. Most of them adopt the transmission structure of motor and multiple gears, which leads to large size and heavy weight, which is not conducive to the lightweight of the vehicle; 2. It is impossible to achieve hidden installation, and it is generally tied to the frame by cable ties or made together with the derailleur, with a prominent structure and poor stability; 3. Due to the prominent structure, the protective performance is poor, that is, it is easy to be bumped and damaged when falling or reversing; 4. Due to the overly concentrated structure and unbalanced installation structure, the weight will be concentrated in a small area, which will break the original weight balance of the vehicle and affect the user's riding experience; 5. It is difficult to modify the existing mechanical speed change system, that is, when the user replaces it, the entire set of equipment needs to be replaced, which increases the user's modification cost. Summary of the invention

[0008] In order to overcome the above-mentioned deficiencies in the prior art, the utility model provides a driver for a derailleur in a vehicle.

[0009] The utility model solves the technical problem by providing a driver for a derailleur in a vehicle, comprising a frame, a handlebar connected to the frame, a front wheel and a rear wheel rotatably connected to the frame, a crank pedal assembly rotatably connected to the frame, a toothed disc transmission-connected to the crank pedal assembly, a flywheel transmission-connected to the toothed disc through a chain, and a derailleur acting on the chain to switch the chain position on the flywheel;

[0010] A hub assembly is provided between the frame and the front wheel or / and the rear wheel. The hub assembly has a through hole. A derailleur electric driver is provided in the through hole. The derailleur electric driver forms a transmission match with the derailleur through a speed change cable.

[0011] The specific configuration of the derailleur electric drive is as follows: the derailleur electric drive comprises an electric drive assembly in the shape of a linear shaft, one end of which is used to connect a speed change cable so that the speed change cable can be extended forward or pulled back along the axis direction;

[0012] A battery assembly electrically connected to the electric drive assembly;

[0013] A drive-end electric control board, which is electrically connected to the battery assembly and is control-connected to the electric drive assembly;

[0014] The manual shift assembly is controlled by the user, and the manual shift assembly forms a wireless communication connection with the drive end electronic control board.

[0015] A more specific structural solution for the vehicle is that it also includes a brake assembly acting on the wheels, and a brake mounting seat arranged on the frame and used to support the brake assembly, and the battery assembly is connected to the brake mounting seat.

[0016] The specific configuration of the electric drive assembly is that the electric drive assembly includes a micro motor, a screw rod transmission-connected to the micro motor, a threaded sleeve movably connected to the screw rod, and a wiring fastener arranged at the end of the threaded sleeve, and the speed change cable is fixedly connected to the wiring fastener.

[0017] Regarding the specific configuration of the wiring fastener, the wiring fastener includes a small diameter section and a large diameter section;

[0018] The small diameter section is inserted into the threaded sleeve and is fixedly connected with the threaded sleeve via an axle pin;

[0019] The large diameter section extends out of the threaded sleeve, and is provided with wire holes and threaded holes that are staggered and connected to each other. A fastening screw is inserted into the threaded hole, and the fastening screw can tighten the speed change wire inserted into the wire hole into the wiring fastener.

[0020] In a preferred embodiment of the utility model, a protective mounting sleeve assembly is also included, and the electric drive assembly is inserted into the protective mounting sleeve assembly.

[0021] A specific solution in a preferred embodiment is that the protective installation sleeve assembly includes a sleeve body, a first cover body detachably connected to one end of the sleeve body, and a second cover body detachably connected to the other end of the sleeve body;

[0022] The second cover body is provided with a through hole, and the shift cable can pass through the through hole and enter into the protective mounting sleeve assembly;

[0023] The first cover body is provided with a cable hole, and a wire is passed through the cable hole to realize electrical connection between the driving end electric control board and / or the battery assembly and the electric driving assembly;

[0024] The sheath body is fixedly connected to the vehicle frame via connecting threads.

[0025] Preferably, the driving end electric control panel and the manual shift assembly are wirelessly connected via a Bluetooth module.

[0026] A preferred configuration of the present invention is that the electric drive assembly is at least partially installed in the through hole.

[0027] In the utility model, the manual shift assembly is installed on the handlebar, and the manual shift assembly has an upshift key and a downshift key.

[0028] The beneficial effects of the utility model are:

[0029] 1. With the help of the existing structure and installation position characteristics of the vehicle, a matching derailleur electric drive was developed. The barrel axle in the original rear wheel hub assembly was removed and replaced with a derailleur electric drive. A battery assembly was installed on the brake mounting seat, and a hand shift assembly was installed on the handlebar, that is, the original mechanical speed change system was converted into an electronic speed change system, and a hidden installation was achieved. The derailleur electric drive was used to replace the barrel axle, which can not only play the role of connecting the hub assembly and the frame, but also play the role of driving the derailleur.

[0030] Second, it adopts an axle-rod shape with small size and light weight, which is conducive to lightweighting of the vehicle and improving the vehicle's competitive performance.

[0031] 3. With the aid of the shaft-shaped shape, it is preferably installed in the hub assembly of the rear wheel to form a structure that is approximately an axle-centered axle, which is beneficial to reducing wind resistance, does not require cable ties to fix, has a concealed structure, and is stable and reliable.

[0032] Fourth, the protective performance is good, that is, the hub assembly of the rear wheel improves the protective effect when falling or reversing, and can effectively avoid bumps and injuries.

[0033] 5. The derailleur electric driver of the utility model is preferably installed in the hub assembly corresponding to the rear wheel, and is therefore preferably coaxially arranged with the hub assembly to form a balanced structure, thereby reducing the impact on the weight balance of the original vehicle and ensuring the user's riding experience.

[0034] 6. The existing mechanical lock speed change system can be directly modified by cutting off a part of the original speed change cable. Since the hub assembly and the derailleur are close to each other, the original derailleur is directly connected to the derailleur electric drive through a shorter speed change cable, and then the hand shift assembly is assembled on the handlebar to obtain an electronic speed change system and realize the electronic speed change function. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is an exploded view of the electric drive assembly.

[0036] Figure 2 It is a schematic diagram of the structure of the electric drive component.

[0037] Figure 3 is a cross-sectional view of the electric drive assembly (pulled back).

[0038] Figure 4 It is a cross-sectional view of the electric drive assembly (extending forward).

[0039] Figure 5 It is a structural schematic diagram and a partial enlarged schematic diagram of the vehicle in the utility model.

[0040] Figure 6 It is a schematic diagram of the structure of the hub assembly of the rear wheel.

[0041] Figure 7 This is a schematic diagram of the disassembly of the rear wheel hub assembly and the derailleur electric drive.

[0042] Figure 8 It is a schematic diagram of the installation location of the battery assembly in the vehicle.

[0043] Fig. 9 It is a schematic diagram of the structure of the wiring fastener.

[0044] Fig.10 It is a schematic diagram of the manual shift assembly.

[0045] Fig.11 It is a partial structural cross-sectional view of the derailleur electric drive and the hub assembly during assembly.

[0046] In the figure: 1, electric drive for chain shifting; 11, electric drive assembly; 111, micro motor; 112, lead screw; 113, threaded sleeve; 114, wiring fastener; 1141, small diameter section; 1142, large diameter section; 1143, wire hole; 1144, threaded hole; 1145, fastening screw; 1146, shaft pin; 12, battery assembly; 13, drive end electric control board; 14, manual shift assembly; 141, upshift key; 142, downshift key; 2. Protective mounting sleeve assembly; 21. Sheath body; 211. Connecting thread; 22. First cover body; 221. Cable hole; 23. Second cover body; 231. Through hole; 24. Electric wire; 3. Shift cable; 41. Frame; 42. Handlebar; 43. Front wheel; 44. Rear wheel; 45. Hub assembly; 451. Through hole; 46. Sprocket; 47. Flywheel; 48. Derailleur; 481. Chain; 49. Brake assembly; 491. Brake mounting seat. DETAILED DESCRIPTION

[0047] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments are only specific descriptions of the present invention, and their purpose is to allow those skilled in the art to better understand the technical solution of the present invention, and should not be regarded as limiting the present invention.

[0048] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0049] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] Embodiment 1

[0051] Reference Figures 1 to 11, a driver for a derailleur in a vehicle, comprising a frame 41, a handlebar 42 connected to the frame 41, a front wheel 43 and a rear wheel 44 rotatably connected to the frame 41, a crank pedal assembly rotatably connected to the frame 41, a toothed disc 46 transmission-connected to the crank pedal assembly, a flywheel 47 transmission-connected to the toothed disc 46 via a chain 481, and a derailleur 48 acting on the chain 481 to switch the chain 481 on the flywheel 47;

[0052] A hub assembly 45 is provided between the frame 41 and the front wheel 43 and / or the rear wheel 44. The hub assembly 45 has a through hole 451. A derailleur electric driver 1 is provided in the through hole 451. The derailleur electric driver 1 forms a transmission fit with the derailleur 48 via a speed change cable 3.

[0053] In the prior art vehicle, the front wheel 43 / rear wheel 44 is fixedly connected with a hub assembly 45, which is connected to the wheel hub on one hand and to the frame 41 through a barrel shaft on the other hand, and the hub assembly 45 is used to realize the rotational cooperation of the wheel hub relative to the frame 41, that is, the barrel shaft plays a single connecting role. In the utility model, the electric derailleur driver 1 is used to replace the barrel shaft, which can play both the connecting role and the driving role of the derailleur.

[0054] The above content is the basic structural scheme of the utility model. When it is used, the chain electric drive 1 is started after receiving the shifting demand instruction. Under the action of the chain electric drive 1, the speed change cable 3 is extended forward or pulled back along the axis direction of the (hub assembly 45), so that the speed change cable 3 can drive the chain derailleur 48 to move, so that the chain 481 can achieve position switching relative to the flywheel 47, that is, the speed change function of upshifting or shifting gears is realized.

[0055] It should be emphasized that the modification instructions for the existing mechanical speed change system are as follows: first, the original hub assembly 45 of the rear wheel 44 is modified or replaced so that the hub assembly 45 of the rear wheel 44 has a through hole 451 to provide installation space; second, the speed change cable 3 in the mechanical speed change system is partially cut off, the derailleur 48 and the speed change cable 3 near the vicinity are retained, and the retained speed change cable 3 is connected to the wiring fastener 114 of the derailleur electric drive 1; third, the manual shift assembly 14 is assembled to the frame 41 to replace the original manual shift assembly to complete the modification.

[0056] It is worth mentioning that, compared with the prior art, the unique features and functions of the present invention are at least: first, it adopts an axle-shaped form, which is small in size and light in weight, which is conducive to lightweighting of the vehicle and improving the competitive performance of the vehicle; second, with the aid of the axle-shaped form, it is preferably installed in the hub assembly 45 of the rear wheel 44 to form an axle-in-axis structure, thereby realizing hidden installation, reducing wind resistance, and no need for cable ties to fix it. The structure is concealed and stable and reliable; third, due to the realization of hidden installation, the protective performance is good, that is, when the vehicle falls or reverses, the hub assembly 45 of the rear wheel 44 improves the protective effect, which can effectively avoid bumps and injuries; fourth, the present invention The derailleur electric driver 1 is preferably inserted into the hub assembly 45 corresponding to the rear wheel 44, and is therefore preferably coaxially arranged with the hub assembly 45 to form a balanced structure, thereby reducing the impact on the weight balance of the original vehicle and ensuring the user's riding experience; fifthly, the existing mechanical lock speed change system can be directly modified, that is, a part of the original speed change cable 3 is cut off. Since the hub assembly 45 is close to the derailleur 48, the original derailleur 48 is directly connected to the derailleur electric driver 1 through the shorter speed change cable 3, and then the hand shift assembly 14 is assembled to the handlebar 42, so as to obtain an electronic speed change system and realize the electronic speed change function.

[0057] Embodiment 2

[0058] Based on the structure of the first embodiment, this embodiment provides a more detailed description of each component, as follows:

[0059] 1. The specific configuration of the derailleur electric drive 1 is as follows: Figure 1 to Figure 5 , Fig.10 The derailleur electric drive 1 includes an electric drive assembly 11, which is in the shape of a linear shaft, one end of which is used to connect the speed change cable 3 so that the speed change cable 3 can be extended forward or pulled back along the axial direction; a battery assembly 12, which is electrically connected to the electric drive assembly 11; a drive-end electric control board 13, which is electrically connected to the battery assembly 12 and forms a control connection with the electric drive assembly 11; a manual shift assembly 14, which is controlled by the user, and the manual shift assembly 14 forms a wireless communication connection with the drive-end electric control board 13.

[0060] The working principle of the derailleur electric drive 1 is as follows: the hand-shifting assembly 14 transmits the signal to the driving end electronic control board 13, and then the driving end electronic control board 13 controls the electric drive assembly 11 to start, and under the action of the electric drive assembly 11, the speed change cable 3 extends forward or pulls back along the axial direction, so that the speed change cable 3 can drive the derailleur 48 to move, so that the chain 481 can achieve position switching relative to the flywheel 47, that is, the speed change function of upshifting or shifting gears is realized.

[0061] Preferably, the driving end electric control board 13 and the manual shift assembly 14 are wirelessly connected via a Bluetooth module. Of course, other wireless communication methods may also be used, which are not particularly limited here.

[0062] Preferably, the manual shift assembly 14 is mounted on the handlebar 42, and the manual shift assembly 14 has an upshift key 141 and a downshift key 142. When in use, the user makes a decision to upshift or downshift according to the current riding condition, and operates the corresponding upshift key 141 or downshift key 142 to send a wireless communication instruction of upshift or downshift to the driving end electronic control board 13.

[0063] 2. The more specific structural scheme of the vehicle is as follows: Figure 8 , and also includes a brake assembly 49 acting on the wheel, and a brake mounting seat 491 arranged on the frame 41 and used to support the brake assembly 49. The battery assembly 12 is connected to the brake mounting seat 491 to solve the installation problem of the battery assembly 12.

[0064] Specifically, most vehicles are equipped with a brake assembly 49, especially vehicles using a hydraulic oil disc, and a brake mounting seat 491 is provided to realize the installation of the brake assembly 49. According to this feature, the battery assembly 12 is installed on the brake mounting seat 491 to provide structural support, and the brake mounting seat 491 also has a multifunctional function, which can realize the installation of the brake assembly 49 and the battery assembly 12 respectively.

[0065] 3. The specific configuration of the electric drive assembly 11 is as follows: Figure 1 to Figure 4 The electric drive assembly 11 includes a micro motor 111, a screw rod 112 transmission-connected to the micro motor 111, a threaded sleeve 113 movably connected to the screw rod 112, and a wiring fastener 114 arranged at the end of the threaded sleeve 113, and the speed change cable 3 is fixedly connected to the wiring fastener 114.

[0066] The micro motor 111 receives a start instruction, drives the screw rod 112 to rotate, and then the screw rod 112 drives the threaded sleeve 113 to move forward or backward relative to the screw rod 112, and then pulls the speed change cable 3 through the wiring fastener 114 to achieve the displacement function of the speed change cable 3.

[0067] Preferably, the electric drive assembly 11 (screw rod 112 and threaded sleeve 113) is at least partially installed in the through hole 451, and the other part (micro motor 111) extends out of the through hole 451. Firstly, it is convenient for wiring the micro motor 111, and secondly, the radial dimensions of the micro motor 111 and components such as the screw rod 112 are different. The zoned installation can make the structure more compact and the layout more reasonable.

[0068] 4. The specific configuration of the wiring fastener 114 is as follows: Figure 3-4 , Fig. 9 The wiring fastener 114 includes a small diameter section 1141 and a large diameter section 1142; wherein the small diameter section 1141 is inserted into the threaded sleeve 113 and is fixedly connected with the threaded sleeve 113 through an axle pin 1146 to realize the linkage between the threaded sleeve 113 and the small diameter section 1141; the large diameter section 1142 extends out of the threaded sleeve 113 and abuts against the end surface of the threaded sleeve 113 to form a limit, and the large diameter section 1142 is provided with wire holes 1143 and threaded holes 1144 that are staggered and connected to each other, and a fastening screw 1145 is connected to the threaded hole 1144, and the fastening screw 1145 can press the shift wire 3 inserted into the wire hole 1143 tightly in the wiring fastener 114.

[0069] Embodiment 3

[0070] Based on the structure of the first embodiment, this embodiment provides a safer protection structure: Figure 1 to Figure 4 , also includes a protective mounting set assembly 2, and the electric drive assembly 11 is arranged inside the protective mounting set assembly 2 to provide effective protection for the components inside the protective mounting set assembly 2.

[0071] The specific structure of the protective mounting cover assembly 2 is as follows: the protective mounting cover assembly 2 includes a cover body 21, a first cover body 22 detachably connected to one end of the cover body 21, and a second cover body 23 detachably connected to the other end of the cover body 21; the second cover body 23 is provided with a through hole 231, and the shift cable 3 can pass through the through hole 231 to enter the protective mounting cover assembly 2; the first cover body 22 is provided with a cable hole 221, and the cable hole 221 is penetrated with an electric wire 24 to realize the electrical connection between the driving end electronic control board 13 and / or the battery assembly 12 and the electric drive assembly 11.

[0072] Among them, refer to Fig.11 The sheath body 21 is fixedly connected to the frame 41 via a connecting thread 211. The frame 41 has a thread that matches the connecting thread 211, thereby achieving a threaded connection to fix the entire derailleur electric drive 1 to the frame 41 and between the frame 41 and the hub assembly 45.

[0073] Another advantage of the protective mounting cover assembly 2 is that it can achieve modular production and installation, that is, the manufacturer can first assemble the electric drive components into the protective mounting cover assembly 2 externally to reduce the difficulty of production and assembly processes; on the other hand, when an internal fault occurs, the protective mounting cover assembly 2 can be taken out of the hub assembly 45 of the rear wheel 44 as a whole, and maintenance operations can be carried out in the external space, which is more convenient.

[0074] It is worth noting that other technical solutions of the present invention belong to the prior art and will not be described in detail.

[0075] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the concept of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A driver for a derailleur in a vehicle, comprising a frame (41), a handlebar (42) connected to the frame (41), a front wheel (43) and a rear wheel (44) rotatably connected to the frame (41), a crank pedal assembly rotatably connected to the frame (41), a toothed disc (46) drivingly connected to the crank pedal assembly, a flywheel (47) drivingly connected to the toothed disc (46) via a chain (481), and a derailleur (48) acting on the chain (481) to switch the chain (481) on the flywheel (47); Features: A hub assembly (45) is provided between the frame (41) and the front wheel (43) or / and the rear wheel (44); the hub assembly (45) has a through hole (451); a derailleur electric driver (1) is provided in the through hole (451); the derailleur electric driver (1) forms a transmission match with the derailleur (48) via a speed change cable (3).

2. The driver for a derailleur in a vehicle according to claim 1, characterized in that: The derailleur electric drive (1) comprises an electric drive assembly (11) in the shape of a linear shaft, one end of which is used to connect a speed change cable (3) so that the speed change cable (3) can be extended forward or pulled back along the axial direction; A battery assembly (12) electrically connected to the electric drive assembly (11); A driving end electric control board (13), which is electrically connected to the battery assembly (12) and is control-connected to the electric drive assembly (11); The manual shift assembly (14) is controlled by a user, and the manual shift assembly (14) forms a wireless communication connection with the driving end electric control panel (13).

3. The driver for a derailleur in a vehicle according to claim 2, characterized in that: It also includes a brake assembly (49) acting on the wheel, and a brake mounting seat (491) arranged on the frame (41) and used to support the brake assembly (49), and the battery assembly (12) is connected to the brake mounting seat (491).

4. The driver for a derailleur in a vehicle according to claim 2, characterized in that: The electric drive assembly (11) comprises a micro motor (111), a screw rod (112) drivingly connected to the micro motor (111), a threaded sleeve (113) movably connected to the screw rod (112), and a wiring fastener (114) arranged at the end of the threaded sleeve (113), and the speed change cable (3) is fixedly connected to the wiring fastener (114).

5. The driver for a derailleur in a vehicle according to claim 4, characterized in that: The wiring fastener (114) comprises a small diameter section (1141) and a large diameter section (1142); The small diameter section (1141) is inserted into the threaded sleeve (113) and is fixedly connected to the threaded sleeve (113) via an axle pin (1146); The large diameter section (1142) extends out of the threaded sleeve (113), and is provided with wire holes (1143) and threaded holes (1144) that are staggered and connected to each other. A fastening screw (1145) is inserted into the threaded hole (1144), and the fastening screw (1145) can tighten the speed change wire (3) inserted into the wire hole (1143) into the wiring fastener (114).

6. The driver for a derailleur in a vehicle according to claim 2, characterized in that: It also includes a protective installation sleeve component (2), and the electric drive component (11) is inserted into the protective installation sleeve component (2).

7. The driver for a derailleur in a vehicle according to claim 6, characterized in that: The protective installation sleeve assembly (2) comprises a sleeve body (21), a first cover body (22) detachably connected to one end of the sleeve body (21), and a second cover body (23) detachably connected to the other end of the sleeve body (21); The second cover body (23) is provided with a through hole (231), and the speed change cable (3) can pass through the through hole (231) and enter the protective mounting sleeve assembly (2); The first cover body (22) is provided with a cable hole (221), and a wire (24) is passed through the cable hole (221) to achieve electrical connection between the driving end electric control board (13) and / or the battery assembly (12) and the electric drive assembly (11); The sheath body (21) is fixedly connected to the vehicle frame (41) via a connecting thread (211).

8. The driver for a derailleur in a vehicle according to claim 2, characterized in that: The driving end electric control panel (13) and the manual shift assembly (14) are connected by wireless communication via a Bluetooth module.

9. The driver for a derailleur in a vehicle according to claim 2, characterized in that: The electric drive assembly (11) is at least partially installed in the through hole (451).

10. The driver for a derailleur in a vehicle according to claim 2, characterized in that: The manual shift assembly (14) is mounted on a handlebar (42), and the manual shift assembly (14) comprises an upshift key (141) and a downshift key (142).

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