Hand change and electric power-assisted bicycle applying same

Abstract

The invention discloses a hand change which comprises a hand change body, the hand change body comprises a first end and a second end opposite to the first end, and a cavity is formed in the hand change body; the brake assembly is pivotally mounted at the second end; the oil cylinder assembly comprises a piston and an oil outlet hole, the piston is movably installed in the cavity and driven by the brake assembly, and the oil outlet hole is formed in the side face of the second end; the sensing assembly is arranged at the second end and on the side surface opposite to the oil outlet hole; the magnetic part is arranged on the piston; the brake assembly can drive the piston and the magnetic piece on the piston to get close to or away from the induction assembly so as to generate a power-off signal or a conductive signal. The induction assembly is arranged on the hand transformer body, the magnetic piece is arranged on the piston, the piston can drive the magnetic piece to be close to or away from the induction assembly when moving, and therefore the power-off signal or the conductive signal is generated, and therefore the brake power-off structure is integrated in the limited space of the hand transformer, and the installation difficulty is small.

Description

Technical Field

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

[0002] As a new type of transportation, road electric-assisted bicycles are widely welcomed because they effectively reduce the obstacles to riders caused by terrain undulations and wind factors during riding with their electric-assisted function. Usually, the shift control mechanism (hand shift) of road electric-assisted bicycles needs to be ergonomically designed, so its external dimensions are strictly restricted. In addition, the hand shift has an integrated speed shift mechanism, and the available space is extremely limited. However, in order to improve riding safety, a brake power-off structure needs to be added to the limited space of the hand shift to promptly cut off the motor power output during braking to prevent the motor from continuously running and causing brake failure or motor overload and heating.

[0003] In the prior art, some brake power-off devices use mechanical switches or cable pulling to control the power on and off, but such solutions are often complex in structure, difficult to install, and have low reliability, and are easily mistriggered or fail due to external environmental influences. At the same time, due to the limited space of the hand shifter, traditional power-off devices are difficult to integrate, resulting in limited application on road electric-assisted bicycles. Therefore, how to integrate a compact, efficient and reliable brake power-off structure within the limited space of the hand shifter is a technical problem that needs to be solved urgently. Summary of the invention

[0004] The object of the present invention is to provide a hand shift and an electric power-assisted bicycle using the hand shift, aiming to solve the problem that the power-off device on the hand shift in the prior art is difficult to integrate, resulting in great difficulty in installation.

[0005] To solve the above technical problems, the objective of the present invention is achieved through the following technical solutions: providing a hand shift, including a hand shift body, the hand shift body including a first end and a second end opposite to the first end, the hand shift body having a cavity inside; a brake assembly, the brake assembly being pivotally mounted on the second end; a cylinder assembly, the cylinder assembly including a piston and an oil outlet hole, the piston being movably mounted in the cavity and driven by the brake assembly, the oil outlet hole being arranged on the side of the second end; an induction assembly, arranged at the second end and on the side opposite to the oil outlet hole; a magnetic member, arranged on the piston; wherein the brake assembly can drive the piston and the magnetic member thereon to be close to or away from the induction assembly to generate a power-off signal or a conductive signal.

[0006] Furthermore, a receiving groove is provided on the side surface of the second end opposite to the oil outlet hole, and the sensing component can be movably arranged in the receiving groove to adjust the distance between the sensing component and the magnetic component.

[0007] Further, the sensing component is connected with a lead wire. A wire outlet groove for accommodating the lead wire is further formed on the side surface opposite to the second end and the oil outlet hole. One end of the wire outlet groove communicates with the accommodating groove, and one end of the wire outlet groove extends from the second end to the first end.

[0008] Further, the surface of the sensing component is lower than or flush with the surface of the hand change body.

[0009] Further, a sliding groove is arranged in the accommodating groove. The sensing component includes a sensing element, and the sensing element is slidably arranged in the sliding groove.

[0010] Further, the sensing component further includes a gland. The gland is detachably connected to the accommodating groove through a connecting piece, and the gland is used for pressing the sensing element.

[0011] Further, a pressing groove is arranged on one side of the gland facing the sensing element. One side of the sensing element is located in the sliding groove, and the other side of the sensing element is located in the pressing groove.

[0012] Further, a connecting hole is further arranged in the accommodating groove on the side of the sliding groove. The sensing component further includes an adjusting part connected to the side of the sensing element. An adjusting long hole with a predetermined length along the length direction of the sliding groove is formed in the adjusting part. The sensing component is slidably arranged in the accommodating groove, and the adjusting long hole is detachably connected to the connecting hole through a connecting piece.

[0013] Further, at least one wire clamping rib is arranged on the groove wall of the wire outlet groove.

[0014] An embodiment of the present invention further provides an electric assist bicycle, including the hand change as described above.

[0015] The present invention provides a hand shifter, which includes a hand shifter body. The hand shifter body includes a first end and a second end opposite to the first end, and a cavity is formed inside the hand shifter body; a brake assembly pivotally mounted at the second end; an oil cylinder assembly including a piston and an oil outlet hole, the piston being movably mounted in the cavity and driven by the brake assembly, and the oil outlet hole being provided on the side surface of the second end; a sensing assembly provided on the side surface of the second end opposite to the oil outlet hole; a magnetic member provided on the piston; wherein, the brake assembly can drive the piston and the magnetic member thereon to approach or move away from the sensing assembly to generate a power-off signal or a conductive signal. By providing a sensing assembly on the hand shifter body and a magnetic member on the piston, when the piston moves, it can drive the magnetic member to approach or move away from the sensing assembly, thereby generating a power-off signal or a conductive signal. In this way, a brake power-off structure is integrated within the limited space of the hand shifter, and the installation difficulty is small. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 FIG. 1 is a schematic structural diagram of Embodiment 1 of a hand shifter provided by an embodiment of the present invention;

[0018] Figure 2 FIG. 2 is a sectional view of a hand shifter provided by an embodiment of the present invention Figure 1 ;

[0019] Figure 3 FIG. 3 is Figure 2 an enlarged view of part A in FIG. 2;

[0020] Figure 4 FIG. 4 is a sectional view of a hand shifter provided by an embodiment of the present invention Figure 2 ;

[0021] Figure 5 FIG. 5 is an exploded view of a hand shifter provided by an embodiment of the present invention;

[0022] Figure 6 FIG. 6 is Figure 5 an enlarged view of part B in FIG. 5;

[0023] Figure 7 FIG. 7 is a schematic structural diagram of Embodiment 2 of a hand shifter provided by an embodiment of the present invention;

[0024] Figure 8 FIG. 8 is Figure 7Enlarged view of part C

[0025] Description of the markings in the figure:

[0026] 10. Hand change main body; 11. Accommodating groove; 111. Sliding groove; 112. Connecting hole; 12. Wire outlet groove; 121. Wire clamping bone

[0027] 20. Brake assembly; 21. Rotating arm part; 22. Brake lever

[0028] 30. Oil cylinder assembly; 31. Piston; 311. First limiting part; 312. Second limiting part; 32. Oil cylinder main body; 321. Oil cylinder cavity; 33. Elastic part; 34. Pressing block

[0029] 40. Induction assembly; 41. Induction part; 42. Pressing cover; 421. Pressing groove; 43. Adjusting part; 431. Adjusting long hole

[0030] 50. Magnetic part Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention

[0032] It should be understood that when used in this specification and the appended claims, the terms "comprises" and "comprising" indicate the presence of the described features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their combinations

[0033] It should also be understood that the terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in this specification of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" are intended to include the plural forms

[0034] It should be further understood that the term " / and / " used in this specification of the present invention and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations

[0035] In combination with Figures 1 to 3As shown in the figure, an embodiment of the present invention provides a shift lever, which includes a shift lever main body 10. The shift lever main body 10 includes a first end and a second end opposite to the first end, and the interior of the shift lever main body 10 has a cavity; a brake assembly 20, which is pivotally installed at the second end; an oil cylinder assembly 30, which includes a piston 31 and an oil outlet hole. The piston 31 is movably installed in the cavity and is driven by the brake assembly 20. The oil outlet hole is arranged on the side surface of the second end; a sensing assembly 40, which is arranged on the side surface of the second end opposite to the oil outlet hole; a magnetic member 50, which is arranged on the piston 31; wherein, the brake assembly 20 can drive the piston 31 and the magnetic member 50 thereon to approach or move away from the sensing assembly 40 to generate a power-off signal or a conductive signal.

[0036] In this embodiment, the brake assembly 20 is pivotally installed at the second end of the shift lever main body 10 and is used to implement a braking action. The sensing assembly 40 is installed at the second end of the shift lever main body 10 and is arranged opposite to the oil outlet hole. The shift lever further includes a shift control assembly (which can be a ratchet shift structure or an electronic control component), and the shift control assembly is closer to the first end than the oil cylinder assembly 30. The oil cylinder assembly 30 includes a movable piston 31, and the piston 31 is installed inside the oil cylinder assembly 30 and can slide up and down. The brake assembly 20 includes a swing arm member 21 and a brake lever 22. The swing arm member 21 adopts a lever structure. The middle part of the swing arm member 21 is rotatably connected to the shift lever main body 10. One end of the swing arm member 21 is connected to the brake lever 22, and the other end is connected to the piston 31 of the oil cylinder assembly 30. When the rider operates the brake lever 22, the brake lever 22 drives the piston 31 to move through the swing arm member 21.

[0037] The sensing assembly 40 can detect a power-off signal or a conductive signal, and the sensing assembly 40 forms a signal transmission with a power supply assembly (not shown in the figure) through an electrical connection method. The magnetic member 50 is installed on the surface of the piston 31. When the piston 31 moves inside the oil cylinder assembly 30, the magnetic member 50 will move accordingly, thereby changing its relative position with the sensing assembly 40, thereby triggering a power control signal.

[0038] Further, the detection principle of the induction component 40 is that the displacement of the magnetic component 50 causes a change in magnetic flux, which generates an induced electromotive force in the induction component 40. In the initial state, that is, when the rider does not squeeze the brake component 20, the piston 31 is in the lower position, and the magnetic component 50 is outside the induction range of the induction component 40 (it can also be set that the magnetic component 50 is within the induction range of the induction component 40. In this embodiment, the outside of the range is preferably used, which can effectively save electricity). At this time, the induction component 40 generates a conductive signal, the power supply component is turned on, and the electric assist function operates normally. When the rider squeezes the brake component 20, the swing arm member 21 makes a lever movement, driving the piston 31 to move upward. The piston 31 is in the upper position and gradually enters the induction range of the induction component 40. When the magnetic component 50 enters the induction range of the induction component 40, the induction component 40 generates a power-off signal, causing the power supply component to disconnect, thereby cutting off the electric assist function to ensure the braking effect. When the rider releases the brake component 20, the brake component 20 resets, the piston 31 simultaneously resets downward, the magnetic component 50 moves away from the induction range of the induction component 40, and the induction component 40 continues to generate a conductive signal, causing the power supply component to resume conduction, and the electric assist function restarts.

[0039] Combined Figure 4 As shown, in an embodiment, the oil cylinder assembly 30 further includes an oil cylinder body 32, an elastic member 33, and a pressing block 34. The oil cylinder body 32 includes an oil cylinder cavity 321. One end of the oil cylinder cavity 321 has an opening. One end of the piston 31 and the elastic member 33 are both located in the oil cylinder cavity 321. The other end of the piston 31 extends out of the opening. One end of the elastic member 33 abuts against the other end of the oil cylinder cavity 321, and the other end of the elastic member 33 abuts against one end of the piston 31. The other end of the piston 31 is connected to the pressing block 34, the pressing block 34 is connected to one end of the swing arm member 21, and the magnetic component 50 is sleeved on the piston 31.

[0040] In this embodiment, the oil cylinder body 32, the elastic member 33, and the pressing block 34 are all used to cooperate with the brake assembly 20 and the swing arm member 21 to realize the reset and movement control of the piston 31. An oil cylinder cavity 321 is formed inside the oil cylinder body 32 for accommodating the piston 31 and the elastic member 33. One end of the oil cylinder cavity 321 has an opening, and the piston 31 can slide axially within the oil cylinder cavity 321, and the oil outlet hole is communicated with the oil cylinder cavity 321. When the piston 31 slides, part of the oil can flow out from the oil outlet hole. Part of the piston 31 is located inside the oil cylinder cavity 321, and the other end of the piston 31 extends out of the opening of the oil cylinder cavity 321, and one end interacts with the elastic member 33 to achieve controlled movement. The elastic member 33 is arranged inside the oil cylinder cavity 321 and is used to provide the elastic force required for the piston 31 to reset. Specifically, one end of the elastic member 33 abuts against the other end of the oil cylinder cavity 321, and the other end of the elastic member 33 abuts against the end face of the piston 31, so as to accumulate elastic potential energy when the piston 31 is pushed by an external force and push the piston 31 back to the initial position after the external force is removed. A convex portion can be provided on the end face of the piston 31, and the other end of the elastic member 33 can be hooked on the convex portion to ensure that the elastic member 33 will not fall off or become displaced when moving with the piston 31.

[0041] To realize the connection with the swing arm member 21, the other end of the piston 31 is fixedly connected to the pressing block 34, and the pressing block 34 is further connected to one end of the swing arm member 21. When the brake assembly 20 is triggered, the swing arm member 21 acts on the pressing block 34, thereby driving the piston 31 to move upward in the oil cylinder cavity 321 and enabling the magnetic member 50 to enter the induction range of the induction assembly 40 to realize the power-off control of the power supply.

[0042] In addition, the magnetic member 50 is sleeved on the piston 31 and moves synchronously with the movement of the piston 31. The magnetic member 50 triggers the conduction and disconnection of the power supply assembly through the change in the relative position with the induction assembly 40, realizes the timely power-off of the electric assist function during braking, and ensures riding safety. Through the above structural design, this embodiment ensures the stable movement of the piston 31 in a limited space, and the elastic member 33 enables the piston 31 to have an automatic reset function, thereby improving the reliability and response speed of the brake power-off structure, reducing mis-triggering caused by external force interference at the same time, and improving the system stability.

[0043] Furthermore, a sealing ring can also be sleeved on the piston 31, and the opening of the sealing ring is arranged near one end of the oil cylinder cavity 321 to prevent the oil in the oil cylinder cavity 321 from leaking when the piston 31 moves, enhancing the tightness of the piston 31.

[0044] In one embodiment, the outer wall of the piston 31 is axially provided with spaced first limiting portions 311 and second limiting portions 312, and the magnetic member 50 is clamped between the first limiting portion 311 and the second limiting portion 312.

[0045] In this embodiment, in order to ensure the stability of the magnetic member 50 during the axial movement of the piston 31 and prevent it from shifting due to vibration or external forces, the outer wall of the piston 31 is axially provided with a first limiting portion 311 and a second limiting portion 312 arranged at intervals. The magnetic member 50 is clamped between the first limiting portion 311 and the second limiting portion 312, thereby realizing the positioning and limiting restraint of the magnetic member 50.

[0046] Specifically, the first limiting portion 311 and the second limiting portion 312 are formed by radially protruding from the outer wall of the piston 31, and their spacing is preset according to the size of the magnetic member 50, so that the magnetic member 50 can be stably held between the two limiting portions and move synchronously with the movement of the piston 31. When the piston 31 slides in the oil cylinder cavity 321, the magnetic member 50 always remains in a fixed position, thereby ensuring the stability of the relative position relationship between it and the induction component 40, and avoiding abnormal induction signals or power control failures caused by the displacement of the magnetic member 50. In addition, the structural design of the first limiting portion 311 and the second limiting portion 312 can effectively prevent the magnetic member 50 from shifting due to inertia or external forces during long-term use, improving the reliability and durability of the entire brake power-off structure.

[0047] Of course, a third limiting portion can also be provided on the piston 31. The third limiting portion is provided near the opening of the oil cylinder cavity 321, and an abutting portion that abuts against the third limiting portion is provided at the opening of the oil cylinder cavity 321. When the piston 31 moves to the position where the third limiting portion abuts against the abutting portion, the piston 31 can no longer move forward. At this time, the piston 31 reaches its maximum movement stroke, that is, the abutting portion can prevent the piston 31 from completely disengaging from the oil cylinder cavity 321.

[0048] Combined Figure 5 and Figure 6 As shown, in one embodiment, a receiving groove 11 is formed on the side surface of the second end opposite to the oil outlet hole, and the induction component 40 is movably arranged in the receiving groove 11 for adjusting the distance between the induction component 40 and the magnetic member 50.

[0049] In this embodiment, in order to facilitate the installation and position adjustment of the induction component 40 to ensure that the induction component 40 can maintain the best induction distance from the magnetic member 50 in different installation environments, a receiving groove 11 is formed at the second end of the hand control body 10 for accommodating the induction component 40. During installation, the induction component 40 can be appropriately adjusted along the sliding direction to ensure that the magnetic member 50 can stably enter or leave the induction area during the movement of the piston 31, thereby ensuring the accuracy of signal output. After the induction component 40 is adjusted to the best position, it is locked and fixed.

[0050] In one embodiment, the sensing component 40 is connected with a lead wire. A wire outlet groove 12 for accommodating the lead wire is further formed on the side surface opposite to the second end and opposite to the oil outlet hole. One end of the wire outlet groove 12 communicates with the accommodating groove 11, and one end of the wire outlet groove 12 extends from the second end towards the first end.

[0051] In this embodiment, the wire outlet groove 12 can be integrally formed by the structure of the hand change main body 10. The lead wire can be orderly arranged and led out from the sensing component 40, avoiding messy distribution and affecting the normal operation of other components. To optimize the wiring direction, the wire outlet groove 12 is designed to extend from the second end to the first end of the hand change main body 10, enabling the lead wire to be reasonably arranged along the layout structure of the hand change main body 10. This wiring method can improve the overall aesthetics and effectively reduce the risks such as loosening and breaking of the lead wire caused by external force pulling or vibration during riding.

[0052] In one embodiment, the surface of the sensing component 40 is lower than or flush with the surface of the hand change main body 10.

[0053] In this embodiment, when the surface of the sensing component 40 is lower than the surface of the hand change main body 10, it can effectively reduce the damage to the sensing component 40 caused by external foreign objects, collisions or frictions during riding, and improve its durability and service life. In addition, this installation method can also prevent the sensing component 40 from being displaced or loosened due to external forces, thus ensuring its optimal sensing effect in the long term. Of course, the surface of the sensing component 40 can also be flush with the surface of the hand change main body 10 to make the overall structure of the hand change more compact while ensuring that the sensing component 40 fully functions.

[0054] In one embodiment, a sliding groove 111 is provided in the accommodating groove 11. The sensing component 40 includes a sensing element 41, and the sensing element 41 is slidably arranged in the sliding groove 111.

[0055] In this embodiment, a sliding groove 111 is provided in the accommodating groove 11. The sensing component 40 includes a sensing element 41, and the sensing element 41 is slidably arranged in the sliding groove 111 to allow the sensing element 41 to be finely adjusted within a certain range to adapt to hand changes of different specifications.

[0056] In one embodiment, the sensing component 40 further includes a gland 42. The gland 42 is detachably connected to the accommodating groove 11 through a connecting piece, and the gland 42 is used to press the sensing element 41.

[0057] In this embodiment, to ensure that the sensing element 41 can be stably fixed after adjustment, the gland 42 is detachably connected to the receiving groove 11 through a connecting member (such as a screw, a buckle, etc.). After installation, the gland 42 can apply a certain pressing force to the sensing element 41 to prevent the sensing element 41 from shifting due to vibration or external force during riding, thereby ensuring the stability and reliability of its sensing effect. Through the above structural design, this embodiment effectively solves the problem that it is difficult to adjust the traditional fixed sensing component during the installation process, improves the installation flexibility, and ensures that the sensing element 41 can maintain the best working state.

[0058] In one embodiment, a pressing groove 421 is provided on the side of the gland 42 facing the sensing element 41. One side of the sensing element 41 is located in the sliding groove 111, and the other side of the sensing element 41 is located in the pressing groove 421.

[0059] In this embodiment, a pressing groove 421 is provided on the side of the gland 42 facing the sensing element 41 for limiting and pressing the sensing element 41. Specifically, the sensing element 41 is adjusted in position through the sliding groove 111, and one side of it is located in the sliding groove 111 for appropriate sliding adjustment during installation. After being adjusted to the appropriate position, the other side of the sensing element 41 fits into the pressing groove 421 of the gland 42. When the gland 42 is fixed to the receiving groove 11 through a connecting member, the pressing groove 421 exerts a certain binding force on the sensing element 41 to firmly position it and avoid loosening or displacement. This embodiment provides a reliable limiting and fixing method while ensuring the adjustable position of the sensing element 41, effectively preventing the displacement of the sensing element 41 caused by vibration or external force during long-term use.

[0060] In addition, the sliding groove 111 can also extend a limiting groove. When the sensing element 41 slides in the sliding groove 111 until it abuts against the limiting groove, at this time, the sensing element 41 cannot continue to slide, and the sensing element 41 reaches the maximum adjustment stroke. The limiting groove can effectively limit the sliding position of the sensing element 41, so that the sensing element 41 always remains within the sensing range.

[0061] Combined Figure 7 and Figure 8 As shown, in one embodiment, a connecting hole 112 is further provided in the receiving groove 11 on the side of the sliding groove 111. The sensing assembly 40 further includes an adjusting portion 43 connected to the side of the sensing element 41. An adjusting long hole 431 with a predetermined length is formed on the adjusting portion 43 along the length direction of the sliding groove 111. The sensing assembly 40 is slidably disposed in the receiving groove 11, and the adjusting long hole 431 is detachably connected to the connecting hole 112 through a connecting member.

[0062] In this embodiment, a connection hole 112 is provided on the side of the sliding groove 111. The connection hole 112 serves as a fixed point for adjustment to ensure that the sensing component 40 can be stably fixed after being adjusted to an appropriate position. It should be noted that the oil cylinder assembly 30 is a detachable structure independent of the hand-operated shift main body 10. When the oil cylinder assembly 30 is disassembled, a cavity can be formed at the second end of the hand-operated shift main body 10. The connection hole 112 can be made into a through hole without worrying about oil leakage problems. The adjustment portion 43 is used to provide a position fine-tuning function, and an adjustment long hole 431 extending along the length direction of the sliding groove 111 is formed thereon. The adjustment long hole 431 has a predetermined length to allow the sensing component 40 to slide and adjust within a certain range to adapt to the installation requirements at different positions.

[0063] During the installation process, the sensing component 40 is slidably disposed in the receiving groove 11, and the sensing element 41 is located in the sliding groove 111. At the same time, the adjustment long hole 431 is detachably connected to the connection hole 112 through a connecting member (such as a screw, a buckle, etc.). When it is necessary to adjust the position of the sensing component 40, loosen the connecting member, move the sensing component 40 along the sliding groove 111 to the optimal sensing position, and then fix the connecting member again to firmly lock the adjustment portion 43 at the connection hole 112, thereby ensuring the stable and reliable sensing position of the sensing element 41.

[0064] In one embodiment, the sensing element 41 is a Hall proximity switch.

[0065] In this embodiment, as a sensor based on the principle of magnetic field induction, the Hall proximity switch can output an electrical signal to control the conduction or disconnection of the power supply component when the magnetic part 50 enters its sensing range. Compared with traditional mechanical switches, the Hall proximity switch has the advantages of non-contact, non-wear, high sensitivity, high stability, etc., and can work stably for a long time in a complex environment. In this embodiment, the Hall proximity switch is the sensing element 41, which is installed in the sliding groove 111 on the hand-operated shift main body 10 and its position is finely adjusted through the adjustment portion 43 to ensure that it can accurately sense the position change of the magnetic part 50 on the piston 31. When the rider does not trigger the brake, the magnetic part 50 is outside the sensing range of the Hall proximity switch, and the power supply component is in the conduction state, and the electric assist function operates normally; when the rider squeezes the brake lever, the brake assembly 20 drives the piston 31 to move through the swing arm member 21, so that the magnetic part 50 enters the sensing range of the Hall proximity switch, thereby triggering the Hall proximity switch to output a signal, causing the power supply component to cut off the power, and timely cutting off the electric assist function to ensure braking safety.

[0066] In addition, in order to avoid overheating of the Hall proximity switch in a continuously powered state and affect its service life, this embodiment preferably uses a normally open Hall proximity switch, which is only turned on when the magnetic part 50 enters the sensing range, ensuring minimum energy consumption and improving the stability and safety of the system at the same time.

[0067] In one embodiment, at least one wire clamping rib 121 is formed on the groove wall of the wire outlet groove 12.

[0068] In this embodiment, the wire outlet groove 12 is used to limit and fix the lead wire. The wire clamping rib 121 adopts a structural clamping method, so that the lead wire can be firmly fixed in the wire outlet groove 12 after installation, effectively preventing the lead wire from loosening, breaking or shifting due to vibration, external force pulling or long-term use during riding, thereby improving the stability and durability of the overall system. In addition, the arrangement of the wire clamping rib 121 ensures the standardization of the lead wire routing, reduces the interference phenomenon caused by the loose circuit, improves the utilization rate of the internal space of the shifter, and enhances the overall installation convenience.

[0069] In one embodiment, the induction component 40 is arranged on the outer side of the shifter body 10, and the oil cylinder component 30 is arranged inside the shifter body 10.

[0070] In this embodiment, as a key component for detecting the brake signal and controlling the power on and off, the induction component 40 needs to form a relative induction relationship with the magnetic part 50. To improve the induction accuracy and reduce the space occupation, the induction component 40 is fixed to the outer side of the shifter body 10 through the mounting structure, so that it can cooperate with the oil cylinder component 30 located inside without interfering with the internal shifting mechanism of the shifter. While ensuring the accurate induction relationship between the induction component 40 and the magnetic part 50, this embodiment effectively optimizes the internal space layout of the shifter, improves the structural compactness, installation convenience and use stability of the brake power-off system, and ensures the reliability and durability of the system during long-term use.

[0071] The embodiment of the present invention also provides an electric assist bicycle, including the shifter as described above.

[0072] In the embodiment, the electric assist bicycle includes a frame, a drive system, a control system and a shifter. Among them, the control system is used to receive the electrical signal of the shifter and control the working state of the drive system. The shifter is installed on the handlebar part of the frame to provide functions of shifting gears, braking and electric assist control.

[0073] When the rider is riding normally, the drive system of the electric assist bicycle is in the on state, and the drive system outputs assistance to assist riding. When the rider squeezes the brake lever, the brake component 20 inside the shifter triggers the movement of the piston 31 in the oil cylinder component 30 through the swing arm 21, so that the magnetic part 50 enters the induction range of the induction component 40, thereby generating a signal to control the drive system to cut off the power, so that the electric assist function is timely turned off to ensure the braking effect. When the rider releases the brake lever, the piston 31 resets under the action of the elastic member 33, the magnetic part 50 moves away from the induction component 40, the induction signal is released, and the electric assist function is turned on again to resume normal riding assistance.

[0074] In summary, the present invention provides a shift lever that can control the on / off of the electric assist system during braking of an electric assist bicycle, ensuring riding safety and optimizing the power usage efficiency. The present invention utilizes the relative position change between the Hall proximity switch and the magnetic member 50 to achieve the conduction and disconnection of the signal circuit. The present invention adopts a normally open Hall proximity switch to avoid overheating problems caused by continuous conduction, while reducing power consumption and improving the endurance of the electric assist bicycle. In addition, the normally open Hall proximity switch can effectively disconnect the electric assist during excessive speed or downhill riding, preventing the drive system from continuously outputting assist during braking, thereby improving the braking effect and avoiding overheating and damage of the drive system caused by overload operation.

[0075] Furthermore, the Hall proximity switch of the present invention is installed on the side of the shift lever body 10, while the magnetic member 50 is fixed on the piston 31, ensuring the stability of the induction signal. Since the positions of the oil cylinder assembly 30 and the magnetic member 50 are not adjustable, to meet the installation requirements of different vehicle models, the present invention is provided with a sliding groove 111 on the shift lever body 10, enabling the Hall proximity switch to be finely adjusted to ensure the best induction effect. At the same time, a wire clamping bone 121 is provided in the wire outlet groove 12 to prevent the lead wire from being broken or displaced due to external pulling force, thereby improving the reliability and durability of the system.

[0076] In summary, the brake power-off structure of the present invention has the advantages of compact structure, simple installation, fast response, low energy consumption, stability and reliability, etc. It can achieve precise power control within the limited space of the shift lever, effectively improving the safety and service life of the electric assist bicycle.

[0077] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A hand change, characterized in that: include: A hand-shift body, the hand-shift body comprising a first end and a second end opposite to the first end, and the hand-shift body has a cavity inside; a brake assembly pivotally mounted on the second end; An oil cylinder assembly, the oil cylinder assembly comprising a piston and an oil outlet hole, the piston being movably mounted in the cavity and driven by the brake assembly, the oil outlet hole being arranged on a side surface of the second end; A sensing component is disposed on the second end and on a side opposite to the oil outlet hole; A magnetic member, disposed on the piston; The brake assembly can drive the piston and the magnetic component thereon to move closer to or farther from the sensing assembly to generate a power-off signal or a conduction signal.

2. The hand change according to claim 1, characterized in that: A receiving groove is provided on the side surface of the second end opposite to the oil outlet hole, and the sensing component can be movably arranged in the receiving groove to adjust the distance between the sensing component and the magnetic component.

3. The hand change according to claim 2, characterized in that: The sensing component is connected to a lead wire, and a wire outlet groove for accommodating the lead wire is provided on the side of the second end opposite to the oil outlet hole, one end of the wire outlet groove is connected to the accommodating groove, and one end of the wire outlet groove extends from the second end to the first end.

4. The hand change according to claim 2, characterized in that: The surface of the sensing component is lower than or flush with the surface of the hand-shift body.

5. The hand change according to claim 2, characterized in that: The accommodating groove is provided with a sliding groove, and the sensing component comprises a sensing member, and the sensing member can be slidably disposed in the sliding groove.

6. The hand change according to claim 5, characterized in that: The sensing component further comprises a pressure cover, which is detachably connected to the accommodating groove via a connecting piece and is used for pressing the sensing element.

7. The hand change according to claim 6, characterized in that: A pressing groove is arranged on one side of the pressure cover facing the sensing element, one side of the sensing element is located in the sliding groove, and the other side of the sensing element is located in the pressing groove.

8. The hand change according to claim 5, characterized in that: The accommodating groove is also provided with a connecting hole located on the side of the sliding groove. The sensing component also includes an adjusting portion connected to the side of the sensing member. The adjusting portion is provided with an adjusting long hole with a predetermined length along the length direction of the sliding groove. The sensing component can be slidably arranged in the accommodating groove, and the adjusting long hole is detachably connected to the connecting hole through a connecting member.

9. The hand change according to claim 3, characterized in that: The groove wall of the wire outlet groove is provided with at least one wire clamping bone.

10. An electric power-assisted bicycle, characterized in that: Including the hand change as described in any one of claims 1-9.

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