A control method for folding an electric vehicle system and an electric vehicle system

Abstract

The present invention discloses a control method for folding an electric vehicle system and an electric vehicle system. On the one hand, the control method for folding an electric vehicle system proposed by the present invention can automatically identify the driving state of the electric vehicle, and according to the data of the speed measurement module, the control module timely distinguishes different situations and folds or unfolds the pedals, which greatly improves the driver's experience. The electric vehicle system includes a transmission component and a drive component, the drive component is electrically connected to the control module, and the drive component executes the command of the control module to fold or unfold the transmission component.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicles, and in particular to a control method for folding an electric vehicle system and an electric vehicle system. Background Art

[0002] In recent years, with the development of new energy sources, the popularity of electric vehicles has continued to increase. According to the new national standard, electric vehicles must be equipped with pedals and related transmission components. When the electric vehicle is fully charged, the driver drives the electric vehicle by electricity, and his feet rest on the pedals on both sides, which is conducive to maintaining the driver's center of gravity stable, improving stability during riding, and ensuring the driver's safe driving; when the power is insufficient, the driver uses manpower to step on the pedals to drive the electric vehicle to continue driving. In order to improve the portability of electric vehicles, foldable pedal designs have appeared. Generally, the pedals are installed on the cranks through hinges or other quick-release structures, and then the pedals are folded or unfolded manually. The process of manually operating the pedals to fold or unfold lacks precise motion control, which in turn causes the pedals to be folded or unfolded in place, making them inconvenient to use.

[0003] Some electric vehicles on the market have begun to be equipped with automatic folding or unfolding pedals, which are generally driven by motors or electric cylinders through commands issued by the driver. The actual situation is that when the driving conditions of the electric vehicle are different, the driver's needs for unfolding or folding the pedals are different. The existing electric vehicle pedal automatic storage mode is too dependent on manual commands and cannot respond to the driver's needs in a timely manner. Summary of the invention

[0004] The main purpose of the present invention is to provide a foldable electric vehicle system and an electric vehicle system, aiming to solve the technical problem that the existing electric vehicle pedal automatic folding mode is too dependent on manual instructions.

[0005] To achieve the above object, according to one aspect of the present invention, a control method for folding an electric vehicle system is provided, the control method comprising:

[0006] Step 1: The speed measurement module monitors the vehicle's driving status:

[0007] The vehicle speed threshold interval is set to 0.5m / s~1m / s, and the slip judgment threshold is set. The slip judgment threshold includes the acceleration difference threshold and the angular velocity difference threshold. The acceleration difference threshold is 0.2m / s²~0.4m / s², and the angular velocity difference threshold is 0.1rad / s~0.3rad / s; the speed measurement module monitors the rotation speed of the electric vehicle wheels and converts it into the actual driving speed; the accelerometer measures the linear acceleration of the vehicle in the three axes of X, Y, and Z, and the gyroscope measures the angular velocity of the vehicle in the three axes of X, Y, and Z; the speed measurement module transmits the data during the vehicle's driving process to the control module.

[0008] Step 2: The control module processes the data of the speed measurement module:

[0009] When the actual driving speed exceeds the vehicle speed threshold interval, the control module sends a first signal to the driving mechanism, and the driving mechanism drives the pedal to unfold;

[0010] When the actual driving speed exceeds the vehicle speed threshold interval, the control module determines whether the vehicle driving state exceeds the skidding determination threshold by combining the linear acceleration and angular velocity data through the Kalman filter fusion algorithm; when the vehicle driving state exceeds the skidding determination threshold and it is determined that the vehicle is skidding, the control module sends a second signal to the driving mechanism, and the driving mechanism drives the pedal to fold;

[0011] When the actual driving speed does not exceed the vehicle speed threshold interval, the control module sends a second signal to the driving mechanism; the driving mechanism drives the pedal to fold.

[0012] Furthermore, the control method also includes: the position sensor detects the state of the pedal, when the pedal is unfolded, the position sensor sends a third signal to the buzzer, and the buzzer prompts the driver that the pedal is unfolded; when the pedal is folded, the position sensor sends a fourth signal to the buzzer, and the buzzer prompts the driver that the pedal is folded.

[0013] Furthermore, a pressure sensor is provided on the pedal; when the pedal is unfolded, the pressure sensor is electrically connected to the buzzer, and when the driver's foot leaves the pedal, the pressure sensor transmits a fifth signal to trigger the buzzer, and the buzzer prompts the driver to restore his foot to the pedal.

[0014] According to another aspect of the present invention, an electric vehicle system is proposed, which adopts the above-mentioned control method for folding an electric vehicle system, including an electric vehicle, on which a speed measuring module, a control module and a position sensor are provided, and the speed measuring module is electrically connected to the control module; the electric vehicle is also provided with a position sensor and a buzzer, and the position sensor is electrically connected to the buzzer; the electric vehicle includes a transmission assembly and a drive mechanism; the drive mechanism is fixedly connected to the transmission assembly and electrically connected to the control module.

[0015] Furthermore, the transmission assembly includes a crank, and pedals are arranged at both ends of the crank. A crank tail folding block is arranged at the position of the crank corresponding to the pedal. The crank tail folding block is fixedly connected to the pedal and is rotationally connected to the crank.

[0016] Furthermore, the crank is provided with a driving mechanism corresponding to the crank tail folding block, and the driving structure includes an electric cylinder and a slider. The electric cylinder is fixedly connected to the crank, the slider is slidably connected to the crank, the telescopic end of the electric cylinder is fixedly connected to the slider, and the slider can contact the crank tail folding block. The electric cylinder is electrically connected to the control module through the control circuit.

[0017] Furthermore, a through groove is provided at the position of the crank corresponding to the driving mechanism, the electric cylinder is fixedly connected to the inner wall of the through groove, a sliding groove is provided on the inner wall of the through groove, and the slider is provided with a protrusion matching the sliding groove.

[0018] Furthermore, the slider includes a main body and a convex rod, the main body is connected to the electric cylinder and is provided with a convex block; one end of the convex rod is integrated with the main body, and the other end is provided with a roller that is in rolling contact with the crank tail folding block.

[0019] Furthermore, the crank tail folding block includes a threaded barrel and a connecting block, the threaded barrel is threadedly connected to the pedal, a round hole is provided on the connecting block, a rotating shaft matching the round hole is provided on the crank, and a torsion spring is provided on the rotating shaft.

[0020] Furthermore, a slope surface in contact with the sliding block is provided on the connecting block, and a limit block is provided on the slope surface.

[0021] Beneficial effects: The speed measurement module monitors the vehicle's driving speed, linear acceleration and angular velocity in real time, and processes the data of the speed measurement module through the control module. When the vehicle is driving, the control module automatically sends a command to the drive mechanism to adjust the pedal to unfold, so that the driver can use the pedal to maintain balance while driving the vehicle; when the vehicle slows down to a stop, the control module automatically sends a command to the drive mechanism to adjust the pedal to fold, so that the driver can get off and park the vehicle; the control module automatically determines that the electric vehicle is slipping according to the changes in the vehicle's linear acceleration and angular velocity, and retracts the pedal in time when the electric vehicle slips, so that the driver can adjust his posture and maintain balance. Prevent the pedal from hitting the driver when the electric vehicle slips. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0023] Figure 1 A schematic diagram of the folding system of the electric vehicle of the present invention;

[0024] Figure 2 It is a schematic diagram of unfolding the foldable system of an electric vehicle of the present invention;

[0025] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0026] Figure 4 is a schematic diagram of a crank of the present invention;

[0027] Figure 5 for Figure 4 A partial enlarged view of point B in the middle;

[0028] Figure 6 It is a schematic diagram of assembling the pedal and the crank tail folding block of the present invention;

[0029] Figure 7 is a schematic diagram of a slider of the present invention;

[0030] Description of Figure Numbers:

[0031] 1. Coupling shaft; 2. Crank tail folding block; 3. Pedal; 11. Sprocket; 12. First crank leg; 13. Second crank leg; 121. No. 1 buzzer; 131. No. 2 buzzer; 132. Through groove; 133. Slide groove; 134. Slider; 135. Electric cylinder; 136. Rotating shaft; 1361. Torsion spring; 1341. Main body; 1342. Protruding rod; 1343. Protruding block; 1344. No. 2 position sensor; 1345. Roller; 21. Threaded cylinder; 22. Connecting block; 221. Round hole; 222. Slope; 223. Limiting block; 31. First pedal; 32. Second pedal.

[0032] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0035] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, "and / or" in the full text includes three solutions. Taking A and / or B as an example, it includes technical solution A, technical solution B, and technical solution that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, which must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0036] The present invention provides a control method for folding an electric vehicle system, the control method comprising:

[0037] Step 1: The speed measurement module monitors the vehicle's driving status:

[0038] The speed threshold interval is set to 0.5m / s~1m / s. The speed threshold interval is less than the walking speed of an adult of 1.3m / s. This is used as the basis for judging the acceleration process of the electric vehicle when it starts or the deceleration process when it stops. The slip judgment threshold is set. The slip judgment threshold includes the acceleration difference threshold and the angular velocity difference threshold. The slip judgment threshold is used as the basis for the electric vehicle system to automatically judge the driving state of the vehicle. The acceleration difference threshold is 0.2m / s²~0.4m / s². When the acceleration of the electric vehicle suddenly changes and exceeds the acceleration difference threshold, the electric vehicle system automatically judges that the electric vehicle is in an unconventional acceleration state. The angular velocity difference threshold is 0.1rad / s~0.3rad / s, which is used to monitor the stability of the electric vehicle during the steering process, ensure that it will not lose control when turning, and improve the accuracy of the electric vehicle system automatically judging the driving state of the electric vehicle. The accelerometer measures the linear acceleration of the vehicle in the three axes of X, Y, and Z, and the gyroscope measures the angular velocity of the vehicle in the three axes of X, Y, and Z; the speed measurement module transmits the data during the vehicle's driving process to the control module. By refining the data of vehicle speed, acceleration threshold and angular velocity threshold, the system can more accurately identify the driving status of the electric vehicle, thereby effectively determining whether it is in a normal acceleration or deceleration stage.

[0039] The speed measurement module is equipped with a Hall sensor, which uses magnetic fields for measurement without direct contact with the wheel and provides accurate speed values.

[0040] ;

[0041] V is the vehicle speed, r is the wheel radius, and n is the wheel speed. The speed measurement module monitors the speed of the electric vehicle wheels and converts it into the actual driving speed. The speed measurement module transmits the data during the vehicle driving process to the control module.

[0042] Step 2: The control module processes the data of the speed measurement module:

[0043] When the actual driving speed exceeds the vehicle speed threshold interval, the control module determines that the electric vehicle is in the starting acceleration state, and the driver needs to unfold the pedal 3 to maintain the balance state during driving. The control module sends a first signal to the drive mechanism, and the drive mechanism drives the pedal 3 to unfold. When the pedal 3 rotates to be perpendicular to the side of the electric vehicle body, the pedal 3 is in the unfolded state.

[0044] When the actual driving speed exceeds the vehicle speed threshold interval, the speed measurement module feeds back the linear acceleration and angular velocity data to the control module. The control module combines the linear acceleration and angular velocity data through the Kalman filter fusion algorithm to determine whether the vehicle's driving state exceeds the skidding judgment threshold. When the vehicle's driving state exceeds the skidding judgment threshold and it is determined that the vehicle is skidding, the control module sends a second signal to the drive mechanism, and the drive mechanism drives the pedal 3 to fold. When the pedal 3 rotates to be parallel to the side of the electric vehicle body, it is in the folded state of the pedal 3. When the electric vehicle skids or stops suddenly, the driver needs to leave the pedal 3 with both feet in order to maintain balance. If the pedal 3 is not retracted in time, it is easy for the driver to lose balance, or the pedal 3 bumps against the driver. By monitoring the skidding condition in real time, the system can issue an alarm or take corresponding measures in time, thereby effectively reducing the risk of accidents.

[0045] When the actual vehicle speed does not exceed the vehicle speed threshold interval, the control module determines that the electric vehicle is in a stopped and decelerated state, and the driver needs to fold the pedal 3 to facilitate the driver to get off and park the vehicle. The control module sends a second signal to the drive mechanism, and the drive mechanism drives the pedal 3 to fold.

[0046] The electric vehicle is provided with a position sensor for detecting the state of the pedal 3. When the pedal 3 is unfolded, the position sensor sends a third signal to the buzzer, and the buzzer prompts the driver that the pedal 3 has been unfolded. When the pedal 3 is folded, the position sensor sends a fourth signal to the buzzer, and the buzzer prompts the driver that the pedal 3 has been folded. The state of the pedal 3 is notified to the driver through the buzzer, which makes it easy for the driver to quickly and conveniently perceive the state of the pedal 3, thereby improving the interactivity between the system and the driver.

[0047] A pressure sensor is provided on the pedal 3. When the pedal 3 is unfolded, the pressure sensor is electrically connected to the buzzer. When the driver's foot leaves the pedal 3, the pressure sensor transmits a fifth signal to trigger the buzzer, and the buzzer prompts the driver to restore the foot to the pedal 3. The pressure sensor monitors the position of the driver's foot in real time, and issues a warning immediately when the foot leaves the pedal 3, thereby preventing potential dangers caused by the driver's foot leaving the pedal 3 during the driving of the electric vehicle.

[0048] like Figure 1 to Figure 7 As shown, an electric vehicle system includes an electric vehicle, wherein the electric vehicle is provided with a speed measuring module, a control module and a position sensor, and the speed measuring module is electrically connected to the control module. The electric vehicle is also provided with a position sensor and a buzzer, and the position sensor is electrically connected to the buzzer. The electric vehicle includes a transmission assembly and a drive mechanism. The drive mechanism is fixedly connected to the transmission assembly and electrically connected to the control module.

[0049] The transmission assembly includes a crank, a crank tail folding block 2, and a driving mechanism. Pedals 3 are provided at both ends of the crank. The crank is the core component of the system. The crank is rotated by stepping on the pedal 3 manually, and the crank converts human power into a kinetic energy source for the system. A crank tail folding block 2 is provided at the position of the crank corresponding to the pedal 3. The crank tail folding block 2 is fixedly connected to the pedal 3 and is rotationally connected to the crank. The pedal 3 rotates around the crank with the crank tail folding block 2, so that the pedal 3 can achieve the folding function. This makes it convenient for the driver to reduce the footprint of the electric vehicle when parking the electric vehicle and improves convenience.

[0050] The crank is provided with a driving mechanism corresponding to the crank tail folding block 2, and the driving structure includes an electric cylinder 135 and a slider 134. The electric cylinder 135 is fixedly connected to the crank, and the slider 134 is slidably connected to the crank. The telescopic end of the electric cylinder 135 is fixedly connected to the slider 134. The electric cylinder 135 drives the slider 134 to move along the crank, and the slider 134 contacts the crank tail folding block 2 and drives the crank tail folding block 2 to rotate. The position of the crank corresponding to the driving mechanism is provided with a through groove 132, and the electric cylinder 135 is fixedly connected to the inner wall of the through groove 132. The inner wall of the through groove 132 is provided with a slide groove 133, and the slider 134 is provided with a protrusion 1343 that cooperates with the slide groove 133. Under the cooperation of the slide groove 133 and the protrusion 1343, the slider 134 can move on the crank along the slide groove 133. The electric cylinder 135 works in the through groove 132, which can reduce the interference of external factors on the electric cylinder 135 and ensure the stable operation of the electric cylinder 135. The slider 134 includes a main body 1341 and a protruding rod 1342. The main body 1341 is connected to the electric cylinder 135 and is provided with a protruding block 1343. The electric cylinder 135 applies an external force to the main body 1341 to enable the slider 134 to move. One end of the protruding rod 1342 is integrated with the main body 1341, and the other end is provided with a roller 1345 that rolls in contact with the crank tail folding block 2. The roller 1345 can reduce the friction when the protruding rod 1342 contacts the crank tail folding block 2, thereby extending the service life of the component.

[0051] The crank tail folding block 2 includes a threaded barrel 21 and a connecting block 22, and the threaded barrel 21 is threadedly connected to the pedal 3. The detachable pedal 3 is easy to replace or repair. A circular hole 221 is provided on the connecting block 22, and a rotating shaft 136 matching the circular hole 221 is provided on the crank, and a torsion spring 1361 is provided on the rotating shaft 136. Under the action of the torsion spring 1361, the pedal 3 has a tendency to fold. When the pedal 3 is unfolded, the slider 134 supports the crank tail folding block 2 to keep the pedal 3 in the unfolded state; when the electric cylinder 135 retracts, the slider 134 separates from the crank tail folding block 2, and the pedal 3 automatically folds under the elastic force of the torsion spring 1361. A slope 222 in contact with the slider 134 is provided on the connecting block 22, and a limit block 223 is provided at the highest point of the slope 222. When the slider 134 contacts the slope 222, the crank tail folding block 2 is subjected to a larger torque, which facilitates the crank tail folding block 2 to rotate around the rotating shaft 136; when the slider 134 contacts the limit block 223, the crank tail folding block 2 has completed a 90° rotation, and the pedal 3 has been unfolded to the extreme position, and the slider 134 does not need to continue to slide forward.

[0052] The electric cylinder 135 is electrically connected to the control module through the control circuit. The control module includes a control panel. The driver can input commands on the control panel, so that the control module sends a signal to the electric cylinder 135 through the control circuit. The electric cylinder 135 drives the slider 134 to move, and then drives the crank tail folding block 2 to rotate through the slider 134, thereby realizing the automatic folding function of the pedal 3, and improving the convenience of using the electric vehicle.

[0053] The crank comprises a coupling shaft 1, a sprocket 11, a first crank leg 12 and a second crank leg 13, and the pedal 3 comprises a first pedal 31 and a second pedal 32. The coupling shaft 1 is provided with a sprocket 11, and the two ends of the coupling shaft 1 are respectively connected to one end of the first crank leg 12 and one end of the second crank leg 13. The other ends of the first crank leg 12 and the second crank leg 13 away from the coupling shaft 1 are respectively connected to the first pedal 31 and the second pedal 32 through the crank tail folding block 2. When the first pedal 31 and the second pedal 32 are stepped on by manpower, the first crank leg 12 and the second crank leg 13 rotate, and drive the sprocket 11 on the coupling shaft 1 to rotate, and finally the operation of the entire system is realized through the transmission of the sprocket 11.

[0054] The first crank leg 12 and the second crank leg 13 are respectively provided with a position sensor No. 1 and a position sensor No. 2 1344, and the sensing ends of the position sensor No. 1 and the position sensor No. 2 1344 are respectively facing the first pedal 31 and the second pedal 32. The position sensor No. 1 and the position sensor No. 2 1344 are both electrically connected to the control module through the control circuit. The sensor No. 1 and the sensor No. 2 can detect the position of the pedal 3. When the pedal 3 is folded, the pedal 3 is closest to the position of the sensor No. 1 or the sensor No. 2. At this time, the sensor No. 1 or the sensor No. 2 sends a signal to the control module through the control circuit. The sensor No. 1 and the sensor No. 2 are independent of each other and do not interfere with each other.

[0055] The first crank leg 12 and the second crank leg 13 are respectively provided with a first buzzer 121 and a second buzzer 131. The first buzzer 121 and the second buzzer 131 are both electrically connected to the control module through the control circuit, and the first buzzer 121 and the second buzzer 131 work independently and do not interfere with each other. When the control module receives a signal from the first sensor or the second sensor, the corresponding first buzzer 121 or the second buzzer 131 will be triggered to emit a prompt sound, so that the driver can judge the situation of the first pedal 31 and the second pedal 32 without deliberately observing with the naked eye.

[0056] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A control method for folding an electric vehicle system, characterized in that: The control method comprises: Step 1: The speed measurement module monitors the vehicle's driving status: The vehicle speed threshold interval is set to 0.5m / s~1m / s, and the slip determination threshold is set. The slip determination threshold includes an acceleration difference threshold and an angular velocity difference threshold. The acceleration difference threshold is 0.2m / s²~0.4m / s², and the angular velocity difference threshold is 0.1rad / s~0.3rad / s; the speed measurement module monitors the rotation speed of the electric vehicle wheel and converts it into the actual driving speed of the vehicle; the accelerometer measures the linear acceleration of the vehicle in the three axes of X, Y, and Z, and the gyroscope measures the angular velocity of the vehicle in the three axes of X, Y, and Z; the speed measurement module transmits the data during the vehicle driving process to the control module; Step 2: The control module processes the data of the speed measurement module: When the actual driving speed exceeds the vehicle speed threshold interval, the control module determines whether the vehicle driving state exceeds the slip determination threshold by combining the linear acceleration and the angular velocity data through a Kalman filter fusion algorithm; if the linear acceleration and the angular velocity data do not exceed the slip determination threshold, the control module sends a first signal to the drive mechanism, and the drive mechanism drives the pedal (3) to unfold; If the linear acceleration and the angular velocity data exceed the skidding determination threshold and it is determined that the vehicle is skidding, the control module sends a second signal to the driving mechanism, and the driving mechanism drives the pedal (3) to fold; When the actual driving speed does not exceed the vehicle speed threshold interval, the control module sends the second signal to the drive mechanism; and the drive mechanism drives the pedal (3) to fold.

2. A control method for folding an electric vehicle system as claimed in claim 1, characterized in that: The control method further comprises: a position sensor detects the state of the pedal (3); when the pedal (3) is unfolded, the position sensor sends a third signal to a buzzer, and the buzzer prompts the driver that the pedal (3) has been unfolded; when the pedal (3) is folded, the position sensor sends a fourth signal to the buzzer, and the buzzer prompts the driver that the pedal (3) has been folded.

3. A control method for folding an electric vehicle system as claimed in claim 2, characterized in that: The pedal (3) is provided with a pressure sensor; when the pedal (3) is deployed, the pressure sensor is electrically connected to the buzzer; when the driver's foot leaves the pedal (3), the pressure sensor transmits a fifth signal to trigger the buzzer, and the buzzer prompts the driver to return the foot to the pedal (3).

4. An electric vehicle system, using the control method for folding an electric vehicle system according to any one of claims 1 to 3, characterized in that: It includes an electric vehicle, which is provided with a speed measuring module, a control module and a position sensor, and the speed measuring module is electrically connected to the control module; the electric vehicle is also provided with a position sensor and a buzzer, and the position sensor is electrically connected to the buzzer; the electric vehicle includes a transmission component and a driving mechanism; the driving mechanism is fixedly connected to the transmission component and electrically connected to the control module.

5. An electric vehicle system as claimed in claim 4, characterized in that: The transmission assembly comprises: a crank, with pedals (3) being provided at both ends of the crank; a crank tail folding block (2), with the crank tail folding block (2) being provided at a position of the crank corresponding to the pedal (3); the crank tail folding block (2) being fixedly connected to the pedal (3) and rotatably connected to the crank.

6. The electric vehicle system according to claim 5, characterized in that: The crank and the crank tail folding block (2) are each provided with a driving mechanism, the driving mechanism comprising an electric cylinder (135) and a slider (134); the electric cylinder (135) is fixedly connected to the crank, the slider (134) is slidably connected to the crank, the telescopic end of the electric cylinder (135) is fixedly connected to the slider (134), and the slider (134) can contact the crank tail folding block (2); the electric cylinder (135) is electrically connected to a control module via a control circuit.

7. The electric vehicle system according to claim 6, characterized in that: A through groove (132) is provided at a position of the crank corresponding to the driving mechanism, the electric cylinder (135) is fixedly connected to the inner wall of the through groove (132), a slide groove (133) is provided on the inner wall of the through groove (132), and the slider (134) is provided with a protrusion (1343) that matches the slide groove (133).

8. The electric vehicle system according to claim 7, characterized in that: The slider (134) comprises a main body (1341) and a protruding rod (1342); the main body (1341) is connected to the electric cylinder (135) and is provided with the protruding block (1343); one end of the protruding rod (1342) is integrated with the main body (1341), and the other end is provided with a roller (1345) that is in rolling contact with the crank tail folding block (2).

9. The electric vehicle system according to claim 5, characterized in that: The crank tail folding block (2) comprises a threaded barrel (21) and a connecting block (22), wherein the threaded barrel (21) is threadedly connected to the pedal (3), a circular hole (221) is provided on the connecting block (22), a rotating shaft (136) matching the circular hole (221) is provided on the crank, and a torsion spring (1361) is provided on the rotating shaft (136).

10. The electric vehicle system according to claim 9, characterized in that: The connection block (22) is provided with a slope surface (222) in contact with the driving mechanism, and the slope surface (222) is provided with a limit block (223).

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