Front variable-speed chain presser and vertical electric control hand shifter

Abstract

A front speed change chain pressing device is installed on a bicycle frame of a bicycle and comprises a supporting part, a front speed change chain pressing part and a rear speed change chain pressing part, the motor is fixedly connected to the supporting part; the zipper pressing head is provided with a limiting guide plate; the fluted disc set is located on the side, away from the motor, of the chain pressing head and comprises at least two fluted discs arranged side by side in the first direction perpendicular to the plate face of the limiting guide plate. The motor drives the chain pressing head to move in the first direction, the chain hung on any fluted disc is meshed with the adjacent fluted disc, and the chain is connected between the limiting guide plates in an abutting mode and fixed in the first direction. When the motor drives the chain pressing head to move in the first direction, the chain pressing head drives the chain hung on any fluted disc to be meshed with the adjacent fluted disc, so that the chain can be hung on different fluted discs, and the speed of the bicycle can be effectively changed. And the design that the chains abut against the limiting guide plates is adopted, so that the limiting guide plates can fix the chains in the first direction, and the situation that the chains fall off in the direction of entering the adjacent fluted discs during speed changing is avoided.

Description

Technical Field

[0001] This utility model relates to the field of vehicle accessories, and in particular to a front derailleur chain clamp and a vertical electric manual shifter. Background Technology

[0002] As the core component of a bicycle's drivetrain, the derailleur functions by adjusting the meshing relationship between the chain and gears (chainrings and cassettes) with different numbers of teeth. This allows for flexible changes in the gear ratio during riding, helping riders adjust cadence and speed according to different road conditions (such as flat roads, uphill, downhill) and riding needs (such as saving energy or accelerating), thereby improving riding comfort and efficiency. However, current bicycle derailleur technology still faces many unresolved issues in practical applications, which significantly impact riding experience and safety.

[0003] On the one hand, the phenomenon of the chain slipping off the gear during shifting (i.e., chain drop) frequently occurs in existing derailleurs. This is usually due to insufficient precision in the derailleur's guidance and tension control of the chain during shifting, especially in extreme road conditions or improper shifting operations, where the chain can easily slip off the current gear, causing a transmission interruption. Chain drop not only disrupts the riding rhythm and increases the rider's physical exertion, but can also cause safety hazards, such as the chain getting stuck in the wheel or frame, causing loss of control or damage to the vehicle.

[0004] On the other hand, as the direct interaction component between the rider and the derailleur, the rationality of the shifter's structural design directly affects the convenience and reliability of shifting operations. However, existing shifters have some inherent structural defects. For example, the shift cable (the control cable connecting the shifter and the derailleur) is prone to decreased elasticity due to wear, stretching, or aging during long-term use, thus affecting the accurate transmission of shift signals. This may cause the shifter to be unable to effectively control the derailleur's shifting actions, resulting in abnormal situations such as inability to shift (i.e., the derailleur not responding to the shifter's operation) or skipping gears (i.e., the derailleur overreacting to the shifter's operation). These problems not only reduce the smoothness of riding but may also pose a potential threat to riding safety.

[0005] Therefore, it is necessary to provide a front derailleur chain clamp and a vertical electric manual shifter that can effectively change speeds and prevent the chain from falling off the gears during speed changes. Utility Model Content

[0006] The purpose of this invention is to provide a front derailleur chain pressure device that can effectively change speed and prevent the chain from falling off the gears during speed change.

[0007] According to one aspect of this application, a front derailleur chain clamp is provided, mounted on a bicycle frame, the chain clamp comprising:

[0008] Support section, connected to the frame;

[0009] The motor is fixedly connected to the support portion;

[0010] The chain head is equipped with a limit guide plate;

[0011] The toothed disc assembly, located on the side of the chain press head away from the motor, includes at least two toothed discs arranged side by side along a first direction perpendicular to the surface of the limiting guide plate;

[0012] The motor drives the chain pressing head to move along the first direction, and the chain mounted on any of the toothed discs meshes with the adjacent toothed discs. The chain abuts against the limiting guide plates and is fixed in the first direction.

[0013] More preferably, the motor includes a slide rod extending along the first direction and a drive rod extending along the first direction and arranged horizontally alongside the slide rod, and having threads on its surface.

[0014] More preferably, the chain pressing head further includes a threaded hole integrally formed along the first direction, and a limiting hole integrally formed along the first direction and arranged side by side with the threaded hole.

[0015] More preferably, the drive rod is threaded to the threaded hole, the motor drives the drive rod to rotate circumferentially, and the thread on the drive rod drives the pressure chain head to move in the first direction.

[0016] More preferably, the slide rod passes through the limiting hole and is slidably connected to the limiting hole;

[0017] When the pressing head moves along the first direction, the pressing head slides on the slide bar, and the slide bar limits the pressing head.

[0018] More preferably, the chain press further includes:

[0019] The control unit is fixedly connected to the motor and is located on the side of the motor away from the support unit;

[0020] The control unit is electrically connected to the motor.

[0021] More preferably, the surface of the control unit is provided with electronic components, and the surface is located on the side of the control unit away from the motor.

[0022] More preferably, the diameters of the toothed discs in the toothed disc assembly are different.

[0023] A vertical electronically controlled shifter, mounted on the handlebars of a bicycle, is used in the front derailleur chain clamp as described in any of the above descriptions, the shifter comprising:

[0024] The connecting part connects to the handlebars;

[0025] A toggle part is fixedly connected to the connecting part;

[0026] The actuating part is signal-connected to the control part of the chain presser, and the actuating part controls the chain presser head to move along the first direction in sequence through the control part and the motor.

[0027] More preferably, the actuating part includes:

[0028] The first actuating element is disposed on the surface of the actuating part and is located on the side of the actuating part closer to the handlebar;

[0029] The second actuating element is disposed on the surface of the actuating part where the first actuating element is disposed, and is located on the side of the first actuating element away from the handlebar.

[0030] This utility model has the following beneficial effects:

[0031] When the motor drives the chain clamping head to move along the first direction, the chain clamping head causes the chain mounted on any of the sprockets to mesh with the adjacent sprocket, allowing the chain to be mounted on different sprockets and enabling the bicycle to effectively change gears. Furthermore, the design of the chain abutting against the limiting guide plates ensures that the limiting guide plates can fix the chain in the first direction, preventing the chain from falling off when entering the adjacent sprocket during gear changes. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0033] Figure 1 This is a three-dimensional structural diagram of the chain clamp fixed to the bicycle frame according to one embodiment of this application;

[0034] Figure 2 This is an exploded structural diagram of the chain press described in one embodiment of this application;

[0035] Figure 3 This is a schematic diagram of the planar structure of the motor in the chain press according to one embodiment of this application;

[0036] Figure 4 This is a three-dimensional structural diagram of the chain pressing head in the chain pressing device according to one embodiment of this application;

[0037] Figure 5 This is a three-dimensional structural diagram of the chain clamp fixed to the bicycle frame, viewed along a direction perpendicular to the first direction, according to one embodiment of this application.

[0038] Figure 6 This is a three-dimensional structural diagram of the vertical electric shifter fixed to the handlebars of a bicycle according to one embodiment of this application;

[0039] Explanation of reference numerals: 100, chain presser; 10, support unit; 20, motor; 21, slide bar; 22, drive rod; 30, chain presser head; 31, limit guide plate; 32, threaded hole; 33, limit hole; 40, gear assembly; 50, control unit; 51, electronic component; 200, vertical electric shifter; 110, connecting unit; 120, shifting unit; 121, first shifting element; 122, second shifting element; 300, frame; 400, handlebars; F1, first direction. Detailed Implementation

[0040] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this application.

[0041] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0043] Please refer to Figure 1 - Figure 6 One embodiment of this application provides a front derailleur chain clamp 100, which is installed on the bicycle frame 300. The chain clamp 100 includes: a support part 10, a motor 20, a chain clamp head 30, and a chainring assembly 40.

[0044] The support part 10 is connected to the frame 300. The motor 20 is fixedly connected to the support part 10. The chain pressing head 30 is provided with a limiting guide plate 31. The toothed disc assembly 40 is located on the side of the chain pressing head 30 away from the motor 20, and includes at least two toothed discs arranged side by side along a first direction F1 perpendicular to the surface of the limiting guide plate 31. The motor 20 drives the chain pressing head 30 to move along the first direction F1, and the chain mounted on any of the toothed discs meshes with the adjacent toothed discs. The chain abuts against the limiting guide plate 31 and is fixed in the first direction F1.

[0045] The support part 10 serves as the foundation of the entire chain clamp 100, providing fixation and support. Connecting the support part 10 to the frame 300 ensures the chain clamp 100 remains stable during use, preventing positional shifts or instability caused by vibration or external forces. The motor 20 is the core component driving the chain clamp head 30. Fixing the motor 20 to the support part 10 ensures its positional stability, preventing unnecessary external vibrations or impacts that could affect its driving performance and lifespan. The limiting guide plate 31 provides stable guidance for the chain, ensuring it maintains the correct path during gear shifting and preventing slippage or deviation from the sprockets. The limiting guide plate 31 effectively prevents the chain from detaching from the sprockets due to positional instability or misoperation during gear shifting, ensuring no chain drop during riding. The sprocket set 40 is designed to achieve different gear ratios for gear shifting. Multiple sprockets are arranged on the side of the chain tensioner 30 opposite to the motor 20. The motor 20 drives the chain tensioner 30 to switch between different sprockets, thus achieving the function of front derailleur. The design of multiple sprockets arranged side by side increases the working range of the derailleur, adapting to different road conditions and riding needs (such as uphill, flat roads, downhill, etc.). Driven by the motor 20, the chain tensioner 30 can move precisely in the first direction F1, allowing the chain to switch precisely between multiple sprockets. The precise control of the motor 20 reduces chain slippage or gear skipping caused by human error. Compared with mechanical drive, the motor 20 drive method improves the accuracy and flexibility of control. The meshing between the chain and the sprockets is the core of derailleurage. When the chain is attached to a sprocket and meshes with the adjacent sprockets, the gear ratio can be effectively changed, thereby adjusting the riding speed and cadence. This design ensures a smooth transition of the chain during derailleurage and prevents the chain from slipping off. The function of the limiting guide plate 31 is to limit the range of movement of the chain, ensuring that the chain remains in the correct position during shifting and preventing riding interruptions caused by the chain coming off or deviating from its path. Guided by the limiting guide plate 31, the chain runs on the correct track, thereby improving the stability and reliability of shifting.

[0046] More preferably, the motor 20 includes a slide rod 21 extending along the first direction F1, and a drive rod 22 extending along the first direction F1, arranged side by side with the slide rod 21 in the horizontal direction, and having threads on its surface.

[0047] The sliding rod 21 provides a sliding path, allowing the motor 20 to drive the chain pressing head 30 smoothly. The sliding rod 21 extends along the first direction F1, enabling the chain pressing head 30 to slide freely in this direction, ensuring accuracy and stability during movement. The design of the sliding rod 21 not only reduces friction, allowing the motor 20 to drive the chain pressing head 30 more smoothly, but also acts as a limiter, ensuring that the chain pressing head 30 moves only in the direction of the sliding rod 21 (the first direction F1). The drive rod 22 is arranged side-by-side with the sliding rod 21 and extends horizontally, designed to work in conjunction with the sliding rod 21. The output shaft of the motor 20 drives the drive rod 22 to rotate in the same direction via an internal transmission belt. The drive rod 22 has threads that can engage with the threaded holes 32 on the sliding rod 21 or inside the chain pressing head 30, allowing the chain pressing head 30 to translate by rotating the drive rod 22. This side-by-side arrangement ensures that the slide bar 21 and drive bar 22 can cooperate with each other during movement, reducing offset or error during movement, thereby improving the stability and accuracy of the chain clamping head 30. The threaded design is for driving the chain clamping head 30 along the first direction F1 by rotating the drive bar 22. The thread ensures a very tight connection between the drive bar 22 and the chain clamping head 30, avoiding slippage, instability, or loosening. Through the rotation of the thread, the drive bar 22 can precisely push the slide bar 21 or the chain clamping head 30 in the first direction F1, providing higher precision and control. This design allows the chain to be precisely engaged with different sprockets during speed changes.

[0048] More preferably, the chain pressing head 30 further includes a threaded hole 32 integrally formed along the first direction F1, and a limiting hole 33 integrally formed along the first direction F1 and arranged side by side with the threaded hole 32.

[0049] The threaded hole 32 is designed to engage with the threaded drive rod 22. Through the rotation of the thread, the drive rod 22 can push the pressure chain head 30 to translate or move along the first direction F1. The through-hole design of the threaded hole 32 means that the connection between the pressure chain head 30 and the drive rod 22 is very tight and reliable, ensuring stability and accuracy during the driving process. The threaded hole 32 also makes the interaction between the drive rod 22 and the pressure chain head 30 more precise and controllable, allowing the pressure chain head 30 to be accurately adjusted in position as needed. The limiting hole 33 provides restriction or constraint to the movement of the pressure chain head 30, preventing excessive movement or loss of control of the pressure chain head 30 in the radial direction of the slide rod 21. The limiting hole 33 can effectively control the displacement range of the pressure chain head 30, keeping it on the appropriate track during speed change. The design of the chain pressing head 30 being arranged side by side with the threaded hole 32 and integrally formed along the first direction F1 ensures that the chain pressing head 30 can be precisely driven by the thread during movement, while also being constrained by the limiting hole 33, thus ensuring that the chain pressing head 30 is always within the designed range of motion.

[0050] More preferably, the drive rod 22 is threadedly connected to the threaded hole 32, the motor 20 drives the drive rod 22 to rotate circumferentially, and the thread on the drive rod 22 drives the pressure chain head 30 to move along the first direction F1.

[0051] The drive rod 22 is connected to the threaded hole 32 on the chain pressing head 30 via a thread, forming a key component of the mechanical transmission. Through this threaded connection, the drive rod 22 can rotate to push the chain pressing head 30 to translate along the first direction F1. The threaded connection provides a precise transmission method; the matching of the threads ensures a tight fit between the chain pressing head 30 and the drive rod 22, making force transmission more stable and reliable. The motor 20 drives the drive rod 22 to rotate circumferentially, meaning that the motor 20 not only controls the translation of the chain pressing head 30 along the first direction F1 but also controls the rotation of the drive rod 22. This rotational action allows the threaded rod to drive the chain pressing head 30 in the threaded hole 32 to move precisely along the designed trajectory. This design makes the speed change process smoother and more precise, especially when fine adjustments to the position of the chain pressing head 30 are needed; the motor 20's control provides smooth motion. The thread on the drive rod 22 directly acts on the chain pressing head 30, causing it to move along the first direction F1. Because the threaded connection provides directional drive, the rotation of the motor 20 is gradually converted into the translational movement of the pressure head 30 along the first direction F1 through the thread of the drive rod 22. This design allows the movement of the pressure head 30 to be very precise, avoiding other possible motion instability factors (such as excessive or insufficient movement), and ensuring stable meshing between the chain and the toothed disc.

[0052] More preferably, the slide rod 21 passes through the limiting hole 33 and is slidably connected to the limiting hole 33. When the pressing head 30 moves along the first direction F1, the pressing head 30 slides on the slide rod 21, and the slide rod 21 limits the pressing head 30.

[0053] The design of the slide bar 21 and the limiting hole 33 allows the slide bar 21 to pass through and slide within the limiting hole 33. The sliding connection of the slide bar 21 provides guidance and constraint, ensuring that the chain pressure head 30 remains on the designed track during movement. The sliding of the slide bar 21 in the limiting hole 33 provides flexibility and precise guidance, while preventing displacement or deviation of the chain pressure head 30 during movement, ensuring smooth movement along the predetermined trajectory. The movement of the chain pressure head 30 is along the first direction F1, and the slide bar 21 provides a stable support surface on which the chain pressure head 30 can slide. Due to the presence of the slide bar 21, the chain pressure head 30 will not deviate from the original track during movement, avoiding loss of control, jamming, or instability during speed change. The slide bar 21 ensures that the chain pressure head 30 can slide smoothly and precisely along the designed path, ensuring that the chain can be stably engaged with the corresponding gear. The slide bar 21 not only provides guidance but also serves as a limit. When the chain tensioner 30 moves along the first direction F1, the slide bar 21 restricts the chain tensioner 30 through its designed structure, ensuring that the movement of the chain tensioner 30 does not exceed the predetermined range. This limiting function can effectively prevent excessive movement or loss of control of the chain tensioner 30, avoid the chain tensioner 30 slipping out of its normal track, thereby causing the chain to fall off or the gear sprocket to fail to mesh properly, and ensure the safety and stability of the transmission system.

[0054] More preferably, the chain press 100 further includes a control unit 50.

[0055] The control unit 50 is fixedly connected to the motor 20 and is located on the side of the motor 20 opposite to the support unit 10. The control unit 50 is electrically connected to the motor 20.

[0056] The control unit 50 is fixedly connected to the motor 20 and located on the side of the motor 20 away from the support unit 10, demonstrating the close integration between the motor 20 and the control unit 50. This design facilitates signal transmission and functional coordination between the motor 20 and the control unit 50. The movement of the motor 20 typically requires precise adjustment and command transmission through the control unit 50. The location of the control unit 50 on the side of the motor 20 away from the support unit 10 optimizes spatial layout, reduces unnecessary interference and cable complexity, thereby improving the compactness and stability of the entire system. The electrical connection between the control unit 50 and the motor 20 is the core of the entire chain presser 100's operation. The control unit 50 controls the motor 20's start / stop and speed via electrical signals to regulate the movement of the chain press head 30. The electrical connection design ensures precise information transmission between the motor 20 and the control unit 50, enabling the motor 20 to move appropriately according to the commands of the control unit 50. This electrical connection is typically achieved through wires, connectors, etc., ensuring the stability and accuracy of signal transmission.

[0057] More preferably, the surface of the control unit 50 is provided with electronic components 51, and the surface is located on the side of the control unit 50 away from the motor 20.

[0058] The design of mounting electronic components 51 on the surface of the control unit 50 indicates that the control unit 50 is not only a mechanical support component but also undertakes electronic control and signal processing functions. Electronic components 51 typically include sensors, circuit boards, microcontrollers, communication interfaces, etc. They can process signals from the transmission system, control the precise movement of the motor 20, or provide feedback on the system's operating status through sensors. This design allows the control unit 50 to not only provide mechanical support but also participate in the intelligent adjustment of the system, improving the automation level and response speed of the entire transmission. The motor 20 typically generates some electromagnetic interference during operation. If the electronic components 51 are too close to the motor 20, they may be affected by the electromagnetic interference generated by the motor 20, affecting their accuracy and reliability. Placing the electronic components 51 on the side away from the motor 20 can effectively reduce the impact of electromagnetic interference on the electronic components 51, ensuring their stable operation. The motor 20 generates heat during operation, and electronic components 51, such as microcontrollers and sensors, are typically sensitive to temperature. Placing electronic component 51 on the side opposite to motor 20 reduces the direct impact of heat generated by motor 20 on electronic component 51, thus improving its durability and stability. This location also optimizes the overall system layout. By rationally distributing space, collisions or interference between electronic component 51 and other moving parts (such as motor 20, geared disc, etc.) can be avoided. Furthermore, this design simplifies circuit design, reduces wiring complexity, and improves the overall integration of the device.

[0059] More preferably, the diameters of the toothed discs in the toothed disc assembly 40 are different.

[0060] The chainring assembly 40 comprises multiple chainrings of varying diameters. Typically, smaller chainrings are used for lower gears, offering a larger gear ratio and a lighter cadence; larger chainrings are used for higher gears, offering a smaller gear ratio suitable for higher cadences. In the chain clamp 100 design, the different diameters of the chainrings allow the bicycle to adjust gears according to different riding needs. For example, smaller chainrings are suitable for climbing or starting, while larger chainrings are suitable for high-speed riding. The combination of multiple chainrings provides riders with more flexible gear selection.

[0061] A vertical electric shifter 200 is mounted on the handlebars 400 of a bicycle and applied to a chain clamp 100 as described above. The shifter includes a connecting part 110 and a shifting part 120.

[0062] The connecting part 110 is connected to the handlebar 400. The actuating part 120 is fixedly connected to the connecting part 110. The actuating part 120 is signal-connected to the control part 50 of the chain presser 100, and the actuating part 120 controls the chain presser head 30 to move along the first direction F1 in sequence through the control part 50 and the motor 20.

[0063] The vertical electronic shifter 200 refers to the control device installed on the bicycle handlebars 400. It has electronic control functionality and can control the operation of the chain clamp 100 via electrical signals. Unlike traditional mechanical shifters, the electronic shifter transmits gear shifting commands through electronic signals, thus providing more precise and faster control. This design allows the derailleur to perform shifting actions more smoothly and efficiently, improving the riding experience. The connecting part 110 is the connection interface between the shifter and the handlebars 400, typically using threads, clamps, or other fixing methods to install the electronic shifter onto the handlebars 400. Its design not only ensures the stability of the shifter but also ensures that the shifter is in a suitable operating position during riding, facilitating gear shifting. The shifting part 120 is the actual operating component of the shifter, through which the rider performs gear shifting operations. The shifting part 120 is fixedly connected to the connecting part 110, ensuring the stability and reliability of the shifting part 120 during gear shifting. This design prevents the shifter 120 from loosening or shifting, ensuring precise signal transmission for every rider operation. The electrical signal connection between the shifter 120 and the chain tensioner 100 control unit 50 is a core feature of the vertical electronic shifter 200. Through electrical signals, the shifter 120 transmits the rider's operation to the control unit 50, thereby controlling the movement of the motor 20. This connection ensures efficient communication between the shifter and the chain tensioner 100, allowing each shifting command from the rider to be transmitted and executed instantly. Through the electrical signal transmission from the shifter 120, the control unit 50 controls the movement of the motor 20, which in turn pushes the chain tensioner 30 to move along the first direction F1. This process achieves precise shifting. By controlling the movement of the motor 20, the chain tensioner 30 can adjust the chain and sprocket engagement according to the rider's needs, completing the shifting task. The significance of this design lies in achieving high-precision control of the derailleur through electronic means, avoiding potential malfunctions or delays that may occur with traditional mechanical shifting, and improving shifting efficiency and stability.

[0064] More preferably, the actuating part 120 includes: a first actuating member 121 and a second actuating member 122.

[0065] The first actuating member 121 is disposed on the surface of the actuating portion 120 and is located on the side of the actuating portion 120 close to the handlebar 400. The second actuating member 122 is disposed on the surface of the actuating portion 120 on which the first actuating member 121 is disposed and is located on the side of the first actuating member 121 away from the handlebar 400.

[0066] The first derailleur 121 is located on the surface of the derailleur section 120 and is close to the handlebar 400. This design means that the first derailleur 121 is the part most easily accessible to the rider when holding the handlebar 400. The rider typically uses their thumb or forefinger to touch this part to send a control signal when shifting gears. Positioning it close to the handlebar 400 improves the rider's comfort and convenience, reduces the distance required for operation, and makes shifting more natural and rapid. The second derailleur 122 is located on the side of the first derailleur 121 away from the handlebar 400, and is typically touched by the rider with another finger or another hand position. This layout allows for bidirectional control; the rider can choose to use different fingers to operate the first derailleur 121 or the second derailleur 122 as needed, achieving more flexible control. Especially during fast riding, the rider can easily shift gears using different fingers and hand positions, ensuring accurate and rapid shifting under various operational requirements. The parallel arrangement of the first derailleur 121 and the second derailleur 122 makes the operation of the entire derailleur unit 120 more flexible. With the two sets of derailleurs, the rider can flexibly adjust the gears by lightly touching or continuously shifting. The dual-derailleur design makes each operation more efficient, reducing the possibility of misoperation or delayed response during gear shifting. The first derailleur 121 is typically designed to control upshifting, even when the chain moves from a smaller sprocket to a larger sprocket (or a higher gear). The second derailleur 122 controls downshifting, even when the chain moves from a larger sprocket to a smaller sprocket (or a lower gear). The first derailleur 121 is located on the side of the handlebar 400 closest to the handlebar 400, allowing the rider to quickly shift up when needed, usually requiring less force, and is designed for easy operation. The second derailleur 122 is located on the side of the first derailleur 121 away from the handlebar 400, primarily used for downshifting. Compared to upshifting, downshifting may require more force or more precise feedback, so it is usually designed to allow for slightly more force or to enable the rider to accurately judge the gear change.

[0067] Therefore, when the motor 20 drives the chain clamping head 30 to move along the first direction F1, the chain clamping head 30 causes the chain mounted on any of the sprockets to mesh with the adjacent sprocket, allowing the chain to be mounted on different sprockets and enabling the bicycle to effectively change gears. Furthermore, the design of the chain abutting against the limiting guide plates 31 ensures that the limiting guide plates 31 can fix the chain in the first direction F1, preventing the chain from falling off when entering the adjacent sprocket during gear changes.

[0068] The embodiments described above are merely examples of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application.

Claims

1. A front derailleur chain clamp, mounted on a bicycle frame, characterized in that, The chain press includes: Support section, connected to the frame; The motor is fixedly connected to the support portion; The chain head is equipped with a limit guide plate; The toothed disc assembly, located on the side of the chain press head away from the motor, includes at least two toothed discs arranged side by side along a first direction perpendicular to the surface of the limiting guide plate; The motor drives the chain pressing head to move along the first direction, and the chain mounted on any of the toothed discs meshes with the adjacent toothed discs. The chain abuts against the limiting guide plates and is fixed in the first direction.

2. The front-speed chain pressure device according to claim 1, characterized in that, The motor includes a slide rod extending along the first direction and a drive rod extending along the first direction, arranged horizontally alongside the slide rod, and having threads on its surface.

3. A front-speed chain pressure device according to claim 2, characterized in that, The chain pressing head also includes a threaded hole integrally formed along the first direction, and a limiting hole integrally formed along the first direction and arranged side by side with the threaded hole.

4. A front-speed variable chain pressure device according to claim 3, characterized in that, The drive rod is threaded to the threaded hole, the motor drives the drive rod to rotate circumferentially, and the thread on the drive rod drives the pressure chain head to move in the first direction.

5. A front-speed chain pressure device according to claim 4, characterized in that, The slide rod passes through the limiting hole and is slidably connected to the limiting hole; When the pressing head moves along the first direction, the pressing head slides on the slide bar, and the slide bar limits the pressing head.

6. A front-speed variable chain pressure device according to claim 1, characterized in that, The chain press also includes: The control unit is fixedly connected to the motor and is located on the side of the motor away from the support unit; The control unit is electrically connected to the motor.

7. A front-speed chain pressure device according to claim 6, characterized in that, The surface of the control unit is provided with electronic components, and the surface is located on the side of the control unit away from the motor.

8. A front-speed variable chain pressure device according to claim 1, characterized in that, The diameters of the toothed discs in the toothed disc assembly are different.

9. A vertical electric hand lever, mounted on the handlebars of a bicycle, characterized in that, Applied to the front derailleur chain clamp as described in any one of claims 1-8, the hand lever includes: The connecting part connects to the handlebars; A toggle part is fixedly connected to the connecting part; The actuating part is signal-connected to the control part of the chain presser, and the actuating part controls the chain presser head to move along the first direction in sequence through the control part and the motor.

10. A vertical electric control hand lever according to claim 9, characterized in that, The actuating part includes: The first actuating element is disposed on the surface of the actuating part and is located on the side of the actuating part closer to the handlebar; The second actuating element is disposed on the surface of the actuating part where the first actuating element is disposed, and is located on the side of the first actuating element away from the handlebar.

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