Electric power-assisted mountain bike

Abstract

The invention relates to the technical field of electric bicycles, and provides an electric power-assisted mountain bike. The core of the invention lies in the innovation of the frame design, the electric vertical support system is ingeniously integrated into the frame structure, and especially the horizontal pipe shaft arranged in the rear structure provides an ideal installation position for the electric vertical support device. By means of the integrated design, the structural strength and attractiveness of the frame are kept, and the functionality of the whole vehicle is remarkably improved. The innovative frame design comprises a compact electric vertical supporting device, and the automatic unfolding and folding functions are achieved through cooperative work of a warping plate, a linkage assembly, a supporting rod and a motor transmission mechanism. By means of the design, on the premise that the overall performance of the frame is not affected, the stability and safety in the parking process are greatly improved. The supporting reliability is further enhanced through the supporting rod and the reset mechanism which are uniquely designed, and meanwhile it is ensured that the riding performance is not affected in the storage state.

Description

[0001] This application is a divisional application of the Chinese patent application filed on October 17, 2024, with application number 2024114490175 and invention name “Electric-assisted bicycle frame with electric stand and electric-assisted mountain bicycle”. Technical Field

[0002] The present invention relates to the technical field of electric bicycles, and more specifically, to the field of structural design and functional improvement of electric-assisted mountain bicycles. The present invention is mainly directed to the frame structure and support system of electric-assisted mountain bicycles, and more particularly to the design of an integrated electric stand support device and its application in electric-assisted mountain bicycles. Background Art

[0003] In recent years, electric-assisted mountain bikes have become increasingly popular due to their ability to adapt to complex road conditions and long-distance riding. Such vehicles usually use a frame structure similar to that described in the authorization announcement No. CN101428659 B, including a handlebar, a steering shaft connecting the handlebar, longitudinal beams in the front and rear directions, etc. However, existing electric-assisted mountain bikes still have significant deficiencies in the parking support system.

[0004] Currently, most electric mountain bikes are only equipped with side supports, which can only provide single-point support. In contrast, the upright support system can carry most of the vehicle's weight on two support points, providing better stability. This problem is also reflected in the authorization announcement number CN 219134296 U, which mentions the "poor stability problem of the double support connection area" and enhances the overall strength through improvements to the frame structure.

[0005] The special feature of electric mountain bikes is that they are equipped with a power supply unit (battery). Once the vehicle falls over due to unstable support, it may not only damage expensive electronic components, but also cause safety hazards. Therefore, equipping electric mountain bikes with an efficient and stable support system is not only a requirement to improve parking stability, but also an important safety consideration.

[0006] However, traditional stand systems often have the following problems: the structure is bulky, affecting the overall appearance and riding performance of the vehicle. Manual operation is inconvenient, especially for electric mountain bikes with heavy loads, it may take considerable effort to unfold and retract the stand. The integration with the overall structure of the vehicle is low, and it is often used as an independent additional component, which affects the integrity and appearance of the vehicle.

[0007] Although CN101428659 B and CN 219134296 U have made improvements in the frame structure and stability, they still fail to solve the unique stand support requirements of electric mountain bikes. The former is mainly aimed at the design of four-wheeled bicycles, while the latter focuses on the optimization of the frame structure, and neither directly solves the problem of the stand support system of electric mountain bikes. Summary of the invention

[0008] In view of this, the present invention provides an electric-assisted mountain bicycle frame with an electric stand and an integrated electric stand device. Through an innovative linkage mechanism, efficient and stable automatic unfolding and storage functions are achieved, which significantly improves the convenience and safety of use while maintaining the beauty and riding performance of the bicycle.

[0009] The technical solution of the embodiment of the present invention provides an electric-assisted bicycle frame with an electric stand, comprising: an upper beam, a front lower beam and a rear lower beam, which are combined into a triangular structure; a steering tube, located at the connection between the front lower beam and the upper beam; a pedal mounting tube shaft, located at the connection between the front lower beam and the rear lower beam; a rear structure, fixedly connected to the pedal mounting tube shaft, including a chain support and a support beam; a horizontal tube shaft, arranged in the rear structure, close to one side of the pedal mounting tube shaft; an electric stand support device, pivotally mounted on the horizontal tube shaft. Beneficial effects of the technical solution: Structural integration: The electric stand support device is directly pivotally mounted on the horizontal tube shaft, becoming an organic part of the frame, achieving a high degree of structural integration. This design reduces additional mounting points and connectors, and simplifies the overall structure. Optimized space utilization: The electric stand support device is integrated in the rear structure, making full use of the original space of the frame without increasing the overall size of the vehicle. The optimized space layout helps to maintain the streamlined appearance and good weight distribution of the vehicle. Improved stability: The direct connection between the electric stand and the horizontal pipe axis provides a solid support point for the stand. This design can improve the stability of the vehicle when parked and reduce the risk of tipping. Convenient operation: The design of the electric stand eliminates the steps of traditional manual operation, greatly improving the convenience of use. Riders can easily operate the stand through the control system and complete parking support without getting off the vehicle.

[0010] The technical solution of the embodiment of the present invention further provides an electric-assisted mountain bicycle, comprising: The electric-assisted bicycle frame with electric stand; the power supply and control unit is used to provide electric assistance and control the stand action; the electric motor provides pedal force assistance to the rider through electrical connection; the front wheel is rotatably supported on the front of the frame through the front fork; the rear wheel is rotatably supported on the rear structure; the seat is fixedly mounted on the upper beam and the upper part of the rear lower beam. This electric-assisted mountain bike solution significantly improves the practicality, safety and user experience of the vehicle by integrating the electric stand system with the innovative frame design. Its core advantages are: the seamless integration of the electric stand device and the frame not only ensures high stability when parked, but also avoids affecting the appearance and riding performance of the whole vehicle; the optimized design of the power supply and control unit realizes the unified management of electric assistance and stand control, and improves the system efficiency; the coordinated work of the electric motor and the pedal force assistance system greatly reduces the physical exertion of the rider, and is particularly suitable for long-distance and complex terrain riding; the reasonable arrangement of the front and rear wheels and the ergonomic design of the seat ensure excellent controllability and comfort. This comprehensive innovative design not only solves many pain points of traditional electric mountain bikes in parking and use, but also provides users with a riding solution that is both safe, reliable, convenient and comfortable, greatly expanding the application scenarios and market potential of electric-assisted mountain bikes.

[0011] Preferably, the device body comprises: an axle seat having a core shaft; an outer ring parallel to the axis of the axle seat and located above the middle section of the axle seat; two connecting pieces fixed at both ends of the axle seat; two pivots respectively fixed in opposite directions of the two connecting pieces; and a flip rod connecting the outer extensions of the two connecting pieces. The beneficial effects of this additional technical solution are as follows: the design of the axle seat and the outer ring provides a stable support and rotation foundation, the structure of the connecting piece and the pivot enhances the overall strength, and the design of the flip rod realizes effective force transmission.

[0012] Preferably, the linkage assembly includes: a support swivel, which can be rotatably mounted on the core shaft of the shaft seat; a rolling body, which is arranged on the outer periphery of the outer ring; a synchronous belt, which matches the transmission meshing teeth of the support swivel and the rolling body; a transmission belt, one end of which has an elastic telescopic or elastic retracting box and is fixed under the pedal mounting tube shaft, and the other end is wound around the outer periphery of the synchronous belt. The beneficial effects of this additional technical solution: the combination of the support swivel, the rolling body and the synchronous belt realizes a smooth and synchronous transmission, the design of the transmission belt increases the flexibility and adaptability of the system, and the overall structure reduces the transmission error and improves the movement accuracy.

[0013] Preferably, the plate surface of the rocker is provided with an avoidance hole for avoiding the synchronous belt. The beneficial effect of this additional technical solution is: avoiding the interference between the synchronous belt and the rocker, optimizing the space utilization, and making the structure more compact.

[0014] Preferably, a downwardly extending pressing portion is provided on the lower surface of the rocker plate near the force-bearing portion to press the synchronous belt. The beneficial effects of this additional technical solution are: ensuring the effective movement of the synchronous belt, enhancing the force transmission effect, and improving the system responsiveness.

[0015] Preferably, the electric stand device is integrated with other electronic systems of the bicycle through the power supply and control unit to achieve intelligent control. The beneficial effect of this additional technical solution is that it achieves integration with other electronic systems of the bicycle, improving the overall operation intelligence level and user experience.

[0016] Preferably, the two support rods include: an upper section that maintains a straight line shape; and a lower section that has an outwardly expanding arc or angle; wherein the two support rods can rotate along the axis of the upper section to achieve synchronous outward expansion or gathering. The beneficial effects of this additional technical solution are: the straight line design of the upper section is easy to store and save space, the arc or angle design of the lower section increases the support stability, and the rotatable design improves adaptability and is suitable for different terrains.

[0017] As a preference, it further includes: two spherical rotating joints, arranged on the supporting swivel seat, and movably connected to the two struts respectively; a threaded line, arranged on the upper section; a movable block, having two holes respectively passing through and cooperating with the two upper sections, the movable block threadedly cooperating with the threaded line, and its movement can make the two struts gather or expand synchronously. The beneficial effect of this additional technical solution: the flexible adjustment of the struts is realized, and the cooperation of the threaded line and the movable block enables the struts to gather or expand synchronously, thereby enhancing the stability and adaptability of the stand.

[0018] Preferably, it also includes a pulling mechanism, which includes: a pull rod or a pull rope, which is arranged at the sliding part of the seesaw and connected to the movable block; wherein the length of the pull rod or the pull rope or the connection mechanism design enables it to just pull the movable block when the seesaw moves, so that the two support rods expand outward. The beneficial effects of this additional technical solution: the automatic expansion function of the support rod is realized, the convenience and efficiency of the support operation are improved, the support rod is ensured to be deployed in place, and the support stability is increased.

[0019] Preferably, a return spring is further included, which is arranged above the movable block and is used to restore the support rod to its initial position during the storage process. The beneficial effects of this additional technical solution are: assisting the support rod to return to its initial position, simplifying the storage process, increasing the reliability and speed of storage, and reducing the operation steps of the user during the storage process.

[0020] As a preference, it further comprises: a reset torsion spring, which is arranged inside the two pivots and the horizontal tube shaft sleeve; wherein the reset torsion spring makes the device body always have a deflection prestress toward the storage side. The beneficial effects of this additional technical solution are: providing a continuous deflection prestress for the device body, increasing the stability and reliability of the storage process, and reducing the possible jamming or failure to be in place during the storage process.

[0021] Compared with the prior art, the technical solution of the present invention has the following advantages: The electric stand device of the present invention has brought significant improvements and innovations to electric-assisted mountain bikes. Its compact and integrated design not only maintains the beautiful appearance and riding performance of the bicycle, but also greatly improves the convenience of use and the level of intelligence. The electric operation mechanism reduces the user's physical exertion, while improving the efficiency of the deployment and storage of the stand. The innovative linkage assembly and support rod structure design ensure the smoothness and precision of the movement, while enhancing the stability and adaptability of the support, so that it can adapt to various terrain conditions. It makes the conversion between parking and riding of electric-assisted mountain bikes more convenient and efficient, provides users with a safe and easy-to-use solution, and promotes the advancement of electric-assisted bicycle technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the figures required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the figures described below are only some embodiments of the present application. For ordinary technicians in this field, other figures can be obtained based on these figures without paying creative work.

[0023] Figure 1 : Schematic diagram of the overall structure of the electric-assisted mountain bicycle of the present invention This picture shows the complete appearance of an electric-assisted mountain bike, including the overall layout of major components such as the frame, power supply and control unit, electric motor, and electric stand device.

[0024] Figure 2 : Schematic diagram of the frame structure The image shows the frame in detail, including the upper beam, front lower beam, rear lower beam (partially cut away to show internal details), steering tube, pedal mounting tube shaft and rear structure. Special emphasis is placed on the cutaway portion of the rear lower beam to allow for observation of key structures such as the obscured fixed axle rod.

[0025] Figure 3 : Schematic diagram of the fixed shaft rod structure of the frame Focus on the specific position and installation method of the fixed axle rod in the frame, clearly showing its connection with the frame and its role in the overall structure.

[0026] Figure 4 : Schematic diagram of the installation of the rocker plate of the frame It shows in detail how the rocker plate is rotated on the fixed shaft rod, and explains its connection relationship with the device body, as well as the specific position and shape of the sliding part and the force-bearing part.

[0027] Figure 5 : Partial enlarged view of the electric stand support device in the frame (corresponding to Figure 2 Center A) The enlarged partial view clearly shows the assembly details of the electric upright device and the frame at location A, including the initial state or working state of components such as the linkage assembly and the support rod.

[0028] Figure 6 : Schematic diagram of the independent electric support device The electric upright device is separated from the frame and its various components are displayed separately, including the device body, linkage components, fixed shaft rods, etc., to facilitate understanding of its independent structure and function.

[0029] Figure 7 : A partial enlarged view of the electric support device in use (corresponding to Figure 6 Middle B) against Figure 6 The key part at point B in the middle is partially enlarged to show in detail the working principle and specific structural features of this part.

[0030] Figure 8 : Schematic diagram of disassembly of electric support device components The various components of the electric stand device are completely disassembled and separated and displayed one by one, including the shaft seat, outer ring, connecting plate, pivot, flip rod, support swivel seat, rolling element, synchronous belt, etc., to facilitate a deep understanding of its internal structure.

[0031] Fig. 9 : Partial enlarged view of the electric support device components (corresponding to Figure 8 Center C) against Figure 8 The key component at point C in the middle is partially enlarged to show its detailed structure and assembly details.

[0032] Fig.10 : Another perspective overall structural diagram of the electric-assisted mountain bicycle of the present invention and Figure 1 Similar, but showing the bike's general structure from a different angle or focus to more fully showcase the design.

[0033] Fig.11 : Schematic diagram of the electric support device in the storage state Shows the overall appearance of the electric stand device in the fully stored state, emphasizing its compactness.

[0034] Fig.12 : Bottom view of the electric-assisted mountain bike of the present invention The overall structure of the bicycle is shown from the bottom up, with special attention paid to the layout and connection relationship of the bottom components (such as the pedal mounting tube shaft, rear wheel, motor transmission mechanism, etc.).

[0035] Figure symbols: frame 1, upper beam 11, front lower beam 12, rear lower beam 13, steering tube 14, pedal mounting tube shaft 19, rear structure 17, chain support 15, support beam 16, horizontal tube shaft 171, power supply and control unit 2, display control screen 21, battery 9, electric motor 101, electric upright support device 20, device body 201, fixed shaft rod 202, rocker plate 203, sliding part 02, force-bearing part 03, return torsion spring 04, support rod 204, electric Machine transmission mechanism 205, front wheel 30, rear wheel 40, seat 50, front fork 18, handlebar 22, linkage assembly 60, axle seat 206, outer ring 207, connecting piece 208, pivot 209, flip rod 210, support swivel seat 61, transmission meshing teeth 62, rolling body 63, synchronous belt 64, avoidance hole 65, top pressure part 66, transmission belt 67, upper section 71, lower section 72, ball rotating joint 73, thread line 74, movable block 75, return spring 76. DETAILED DESCRIPTION

[0036] The following will be combined Figure 1-Figure 12 The preferred embodiments of the present invention are described in detail. It should be noted that the following description is only a preferred embodiment of the present invention, rather than a limitation of the present invention. Those skilled in the art should understand that various modifications and variations can be made to the present invention without departing from the spirit and scope of the present invention. The scope of protection of the present invention shall be subject to the attached claims.

[0037] Embodiment 1: like Figure 1 , Fig.10 , Fig.12 As shown, an electric-assisted bicycle frame with an electric stand and the overall structure of an electric-assisted mountain bicycle based on the frame are shown. Figure 1 Showing the standing state, Fig.10 The pole is shown in the stowed state. Fig.12 It is a bottom view of the support rod folded. The overall structure is indicated by the figure mark 10, which mainly includes the following parts: 1) Frame 1: It is a preferred triangular structure and is the main frame of the vehicle. It includes an integrated electric stand system and is also the core part of the present invention.

[0038] 2) Power supply and control unit 2: provides electric assistance and controls the standing action. The power supply and control unit 2 includes a display control screen 21 and a battery 9. The display control screen 21 is mounted on the handlebar 22. The battery 9 is preferably detachably fixed to the bicycle frame 1, specifically located on the upper side of the front lower beam 12. This design ensures the stability of the battery and facilitates disassembly and maintenance.

[0039] 3) Electric motor 101: Provides pedal force assistance to the rider through electrical connection.

[0040] 4) Accessories such as wheels, seats, and front forks. The front wheel 30 is rotatably supported on the front of the frame through the front fork 18. The rear wheel 40 is rotatably supported on the rear structure 17 to form a stable rear wheel support structure. The seat 50 is fixedly mounted on the upper beam 11 and the upper part of the rear lower beam 13.

[0041] The main components of the frame 1 include: an upper beam 11, a front lower beam 12, a rear lower beam 13, a steering tube 14, a pedal mounting tube shaft 19, a rear structure 17, and an integrated electric stand support system 20. Among them: the upper beam 11, the front lower beam 12, and the rear lower beam 13 are combined into a triangular structure; the steering tube 14 is located at the connection between the front lower beam 12 and the upper beam 11, and is used to install the front fork 18; the pedal mounting tube shaft 19 is located at the connection between the front lower beam 12 and the rear lower beam 13, and the rear structure 17 is fixedly connected to the pedal mounting tube shaft 19. The rear structure 17 includes a chain stay 15 and a support beam 16. In particular, in the rear structure 17, a horizontal tube shaft 171 is provided on the side close to the pedal mounting tube shaft 19. The horizontal tube shaft 171 is a key structure of the integrated electric stand support system 20, which reflects the innovative design of the frame.

[0042] Reference Figure 4 - Fig. 9 The main components of the electric stand support device 20 include: a. Device body 201: Pivotally mounted on the horizontal tube shaft 171, it is the basic part of the entire stand device. b. Linkage assembly 60 installed in the device body 201. c. Fixed shaft 202: Fixedly set on the upper surface of the horizontal tube shaft 171, providing support and rotation axis for other components. d. Rocker 203: This is a key connection and transmission component, with the following characteristics: the middle section is sleeved on the fixed shaft 202 to ensure that it can rotate around the fixed shaft. One end is the sliding part 02, which extends into the inside of the device body 201 and is used to transmit force and movement. The other end is the force-bearing part 03, which is used to receive the force from the motor transmission mechanism. e. Support rod 204: Two support rods installed on the device body 201 can be switched between the support state and the storage state. These two support rods are the components that actually contact the ground and support the bicycle. f. Motor transmission mechanism 205: This is the power source and control center of the entire device. Its main function is to apply a downward pressure to the force-bearing part 03 of the seesaw 203, and drive the device body 201 to move through the movement of the seesaw 203, so as to control the expansion and folding of the two support rods 204 under the action of the linkage assembly 60. The motor transmission mechanism can be implemented in a variety of different forms. For example: gear transmission, one or more gear sets can be used to convert the rotational motion of the motor into the required linear or rotational motion to drive the seesaw. Chain transmission, through chain transmission, the power of the motor can be flexibly transmitted to the seesaw to achieve its up and down movement. Worm gear transmission, it can convert the rotational motion of the motor into a larger linear motion or a low-speed rotational motion. In situations where a larger transmission ratio and precise control are required, worm gear transmission is a good choice. Linear motor, in applications that require high-speed, high-precision linear motion, linear motors are an ideal choice.

[0043] Working principle: When the stand is needed, the motor transmission mechanism 205 drives the rocker 203 to rotate a certain angle. The rocker 203 interacts with the internal structure of the device body 201 through its sliding portion 02, driving the entire device body 201 to rotate, thereby triggering the linkage assembly 60. In this process, the two support rods 204 are converted from the storage state to the support state, providing stable support for the bicycle. The stowing process is restored through the linkage assembly 60.

[0044] The advantages of this design are: compact structure, no impact on the overall appearance and riding performance of the bicycle, electric operation, easy to use, no effort required by the rider, and can be integrated with other electronic systems of the bicycle through the control system to achieve intelligent control.

[0045] The detailed structure of the device main body 201 (see Fig. 9) includes: a. a shaft seat 206 with a core shaft, which is located at the bottom of the main body, mainly composed of a solid part, and is the foundation of the entire structure; b. an outer ring 207, which is parallel to the axis of the shaft seat 206, located above the middle section of the shaft seat 206, and is an integral structure with the intersection of the shaft seat 206. The outer ring 207 is sleeved on the central outer ring of the horizontal pipe shaft 171 to provide rotation support; c. a connecting piece 208, which is two symmetrical connecting pieces fixed at both ends of the shaft seat 206, and the area of ​​each connecting piece at least covers the outer ring 207 The center of the horizontal tube 171 and the outer ring 207 are coaxial with the outer ring 207 and the two pivots are respectively fixed at the opposite directions of the two connecting pieces 208 to realize the rotation function of the whole device; e. The flip rod 210 connects the extended parts of the two connecting pieces 208 to form a complete frame structure. The flip rod 210 is in contact with the rocker plate 203 and is a key component for force transmission.

[0046] Considering that the rotation range of the two support rods 204 between the supporting and storage states is usually more than 90 degrees, if this process is completed only by the rotation of the device body 201, the following problems will occur: 1) The motor transmission mechanism 205 needs a larger movement range. 2) The support process takes a long time. 3) The entire mechanism occupies a large space, and the movement process is prone to interference, and the layout avoidance increases the complexity of the mechanism. In order to solve these problems, reduce the movement range of the motor transmission mechanism 205, shorten the support time, and optimize space utilization, this design introduces a linkage component 60.

[0047] The detailed structure of the linkage assembly 60 (see Fig. 9 ),include: 1) A support swivel seat 61, which is rotatably mounted on the core shaft of the shaft seat 206, and the main body is a shaft sleeve, and the outer periphery of the middle section of the shaft sleeve is provided with transmission meshing teeth 62; 2) Rolling element 63, which is arranged on the outer circumference of outer ring 207, has the same spacing as transmission meshing teeth 62, is close in size, and can rotate freely; the cooperation between rolling element 63 and synchronous belt 64 ensures the stability and synchronization of the transmission process, and reduces transmission error and vibration; 3) A synchronous belt 64, which matches the transmission meshing teeth 62 and the rolling element 63 so as to mesh synchronously, and has transmission teeth on the outer periphery; 4) a transmission belt 67, one end of which has an elastic retractable or elastic retractable box and is fixed below the pedal mounting tube shaft 19, the other end of which is wound around the outer periphery of the synchronous belt 64 and is located below the rocker plate 203 and the end of which is fixed above the pedal mounting tube shaft 19, and at least part of the contact with the synchronous belt 64 has meshing teeth that cooperate with the outer teeth of the synchronous belt 64; 5) An avoidance hole 65 is provided on the plate surface of the rocker plate 203 for avoiding the synchronous belt 64; 6) The pressing portion 66 is arranged on the lower surface of the rocker plate 203 close to the force-bearing portion 03 and extends downward to press the synchronous belt 64 to force the synchronous belt 64 to move.

[0048] Working principle: In the initial state, the two support rods 204 are fixed on the support swivel 61 at a set angle.

[0049] a) When the seesaw 203 is subjected to force, it first drives the device body 201 to rotate.

[0050] b) At the same time, the pressing portion 66 presses the synchronous belt 64, causing the synchronous belt 64 to rotate.

[0051] c) The rotation of the synchronous belt 64 drives the supporting rotating seat 61 to rotate through the transmission meshing teeth 62.

[0052] d) The rotation of the support swivel 61 further drives the two support rods 204 to rotate.

[0053] Thus, the final rotation angle of the support rod 204 is the sum of the rotation angle of the device body 201 and the rotation angle of the support swivel 61. This design realizes complex movements and a wider range of rotation in a limited space while maintaining the compactness of the structure.

[0054] Storage process: When the stand needs to be stored, the elastic expansion and contraction or elastic retracting mechanism of the stretching belt will assist the support swivel seat 61 and the support rod 204 to return to the initial position. In addition, to further increase the stability of reset and storage, a reset torsion spring 04 is arranged inside the two pivots and the horizontal pipe shaft 171, so that the device body 201 always has a deflection prestress toward the storage side.

[0055] In some embodiments, the design of the two struts 204 is optimized to improve stability and adaptability. The strut structure includes an upper section 71 that maintains a straight line shape and a lower section 72 that has an outwardly expanding arc or angle; The two support rods 204 can rotate along the axis of the upper section 71 to achieve synchronous expansion or convergence. This design ensures that the curvature or angle does not affect the storage space and provides greater stability in the supporting state.

[0056] The specific implementation method includes: two spherical rotating joints 73 are respectively provided on the supporting rotating seat 61 and are movably connected with the two supporting rods 204; The upper section 71 is provided with a thread line 74, and a movable block 75 having two holes respectively passing through the two upper sections 71 is provided, and the movable block 75 is threadedly engaged with the thread line 74. The movement of the movable block 75 can make the two support rods 204 gather together or expand outward synchronously; Pulling mechanism (refer to Figure 4 and Figure 5), a pull rod or a pull rope is set at the sliding part 02, connected to the movable block 75, and the length or connection mechanism is designed so that it can just pull the movable block 75 when the rocker 203 moves, so as to expand the two support rods 204 outward when supporting.

[0057] A return spring 76 is provided above the movable block 75 to restore the support rod to its initial position during the storage process.

[0058] Working principle: Unfolding process: a) When the rocker 203 moves, the movable block 75 is pulled by the pull rod or the pull rope b) The movable block 75 moves on the thread line 74, driving the two support rods 204 to expand outward synchronously. c) The ball swivel joint 73 allows the necessary angle adjustment of the strut d) The curvature or angle of the lower section 72 of the support rod provides additional support area and stability Storage process: a) When the storage starts, the return spring 76 pushes the movable block 75 b) The movable block 75 moves in the opposite direction on the thread line 74, bringing the two support rods 204 together. c) The gathered poles are easier to store, reducing the space occupied Although the present invention has been disclosed in conjunction with certain embodiments shown and described in detail, various modifications and improvements thereto will be readily apparent to those skilled in the art having benefit of the disclosure herein. Therefore, the spirit and scope of the present invention will not be limited by the foregoing examples, but will be understood in the broadest sense permitted by law.

[0059] All documents cited herein are hereby incorporated by reference in their entirety for all purposes.

Claims

1. An electric-assisted mountain bicycle, characterized in that: include: An electric bicycle frame with an electric stand; A power supply and control unit (2), used for providing electric assistance and controlling the movement of the stand; an electric motor (101) that provides pedal force assistance to the rider via an electrical connection; A front wheel (30) is rotatably supported on the front part of the frame via a front fork (18); A rear wheel (40) rotatably supported on the rear structure (17); A seat (50) is fixedly mounted on the upper portion of the upper beam (11) and the rear lower beam (13); The electric-assisted bicycle frame with an electric stand comprises an upper beam (11), a front lower beam (12) and a rear lower beam (13), which are combined into a triangular structure; a steering tube (14) located at the connection between the front lower beam (12) and the upper beam (11); a pedal mounting tube shaft (19) located at the connection between the front lower beam (12) and the rear lower beam (13); a rear structure (17) fixedly connected to the pedal mounting tube shaft (19), comprising a chain support (15) and a support beam (16); and a horizontal tube shaft (171) arranged in the rear structure (17) on a side close to the pedal mounting tube shaft (19); The electric stand support device (20) is pivotally mounted on the horizontal pipe shaft (171); the electric stand support device (20) comprises: The device body (201) comprises a shaft seat (206) having a core shaft, an outer ring (207) sleeved on the central outer ring of a horizontal tube shaft (171), two symmetrical connecting pieces (208) fixed at both ends of the shaft seat (206), and a flip rod (210) connecting the outer extensions of the two connecting pieces (208); a linkage assembly (60) mounted in the device body (201); the linkage assembly (60) comprises: a support rotating seat (61) rotatably mounted on the core shaft of the shaft seat (206); transmission meshing teeth (62) arranged on the outer periphery of the middle section of the shaft sleeve of the support rotating seat (61); rolling bodies (63) arranged on the outer periphery of the outer ring (207); On the periphery: a synchronous belt (64) matching the transmission meshing teeth (62) and the rolling body (63); a transmission belt (67), one end of which is fixed below the pedal mounting tube shaft (19), and the other end is wound around the outer periphery of the synchronous belt (64); a fixed shaft (202), which is fixedly arranged on the upper surface of the horizontal tube shaft (171); a rocker plate (203), the middle section of which is sleeved on the fixed shaft (202); the rocker plate (203) comprises: a sliding portion (02), which extends into the interior of the device body (201); a force-bearing portion (03), which is used to receive the force from the motor transmission mechanism (205); and two support rods (204), which are installed on the device body (201); A motor transmission mechanism (205) for driving the flying board (203); During operation, the two support rods (204) are fixed on the support rotating seat (61) at a set angle. When the seesaw (203) is subjected to force, it first drives the device body (201) to rotate. At the same time, the pressing part (66) presses the synchronous belt (64), causing the synchronous belt (64) to rotate. The rotation of the synchronous belt (64) drives the support rotating seat (61) to rotate through the transmission meshing teeth (62). The rotation of the support rotating seat (61) further drives the two support rods (204) to rotate, thereby realizing the deployment and folding of the two support rods (204).

2. The electric-assisted mountain bicycle according to claim 1, characterized in that: The power supply and control unit (2) includes include: A display control screen (21) mounted on the handle (22); The battery (9) is detachably fixed on the vehicle frame (1), and is specifically located on the upper side of the front lower beam (12).

3. The electric-assisted mountain bicycle according to claim 1, characterized in that: When the support is needed, the motor drives The mechanism (205) drives the seesaw (203) to rotate, and through the action of the device body (201) and the linkage assembly (60), the two support rods (204) Convert from storage state to support state.

4. The electric-assisted mountain bicycle according to claim 1, characterized in that: The electric support device (20) is provided by The power supply and control unit (2) is integrated with other electronic systems of the bicycle to achieve intelligent control.

5. The electric-assisted mountain bicycle according to claim 4, characterized in that: The two support rods (204) include: The upper section (71) maintains a straight line shape; The lower section (72) has an outwardly expanding arc or angle; The two support rods (204) can rotate along the axis of the upper section (71) to achieve synchronous expansion or convergence.

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