阅读说明：本技术 一种电动车安全保障系统 (Electric motor car safety guarantee system ) 是由 马光 李召勤 温法蕊 徐文庆 胡波 于 2021-05-14 设计创作，主要内容包括：本申请公开了一种电动车安全保障系统,包括电机、电机速度传感器、控制器、变速箱、转把和P档开关；所述的电机速度传感器信号输出给所述的控制器,控制器时时检测电机转速,当电机转速低于2500转/分,控制器输出报警,提示驾驶员,切换为机械档位低挡；当车辆在陡坡路段下坡时,骑行人员能够触发P档开关,令P档信号输出给控制器,控制器给电机施加反向阻力,辅助机械刹车平稳的通过陡坡路段；解决了现有技术中电动车在山区使用时因坡度导致的电机失效率高、容易产生制动失灵、电动车可靠性差的技术问题；实现了电动车在山区使用时电机失效率低、制动可靠、使用安全性高的技术效果。(The application discloses a safety guarantee system of an electric vehicle, which comprises a motor, a motor speed sensor, a controller, a gearbox, a rotating handle and a P-gear switch; the motor speed sensor outputs a signal to the controller, the controller detects the rotating speed of the motor constantly, and when the rotating speed of the motor is lower than 2500 rpm, the controller outputs an alarm to prompt a driver to switch to a mechanical gear low gear; when the vehicle runs down a slope on a steep slope section, a rider can trigger the P-gear switch to output a P-gear signal to the controller, and the controller applies reverse resistance to the motor to assist the mechanical brake to stably pass through the steep slope section; the technical problems that the failure rate of a motor is high, the brake failure is easy to generate and the reliability of the electric vehicle is poor due to the gradient when the electric vehicle is used in a mountainous area in the prior art are solved; the technical effects of low motor failure rate, reliable braking and high use safety when the electric vehicle is used in mountainous areas are achieved.)

1. A safety guarantee system of an electric vehicle is characterized by comprising a motor, a motor speed sensor, a controller, a gearbox, a rotating handle and a P-gear switch; the motor speed sensor outputs a signal to the controller, the controller detects the rotating speed of the motor constantly, and when the rotating speed of the motor is lower than 2500 rpm, the controller outputs an alarm to prompt a driver to switch to a mechanical gear low gear; when the vehicle runs down a slope on a steep slope section, a rider can trigger the P-gear switch to output a P-gear signal to the controller, and the controller applies reverse resistance to the motor to assist the mechanical brake to stably pass through the steep slope section.

2. The electric vehicle safety system of claim 1, further comprising an auxiliary brake assembly;

the auxiliary brake assembly comprises an annular brake plate and an auxiliary brake module;

the annular brake plate is characterized in that the main body of the annular brake plate is annular, is fixed on a vehicle wheel and synchronously rotates with the vehicle wheel;

the auxiliary brake module comprises a telescopic rod, a lifting and contracting rod driving component, a rod head bracket, a force borrowing wheel positioning frame, a power transmission component, a blowing component and a brake block;

the telescopic rod is fixed on the frame and plays a role in driving the rod head support to slide along the axial direction of the telescopic rod;

the club head bracket is positioned at one end of the telescopic rod far away from the frame;

the rod head bracket is provided with a sliding groove;

the sliding groove is a through groove, the length direction of the sliding groove is the same as the axial direction of the telescopic rod, and the sliding groove is used for guiding the sliding of the power-assisted wheel positioning frame;

the force-borrowing wheel positioning frame is used for supporting and positioning the force-borrowing wheel, and the force-borrowing wheel positioning frame is positioned on the club head support in a sliding manner along the sliding groove;

the borrowing wheel positioning frame further comprises a sliding inhibition assembly, the sliding inhibition assembly is positioned on the rod head support and used for giving the borrowing wheel positioning frame a tendency of sliding towards the direction of the wheels;

the force-borrowing wheel is positioned on the force-borrowing wheel positioning frame, and the main body of the force-borrowing wheel is in a wheel shape;

when the telescopic rod extends, the force-borrowing wheel props against the annular brake plate and performs autorotation by using friction force;

the power transmission assembly is positioned on the air blowing assembly and is used for transmitting the rotation action of the force borrowing wheel to the air blowing assembly for the air blowing assembly to operate;

the air blowing assembly has the functions of blowing air to the brake assembly, the brake block and/or the motor so as to assist in cooling and improve the reliability of the vehicle;

the main part of brake block be the block, its location is in the pole head support be close to the one end of wheel, during the brake block use, its conflict is in annular brake block on and then through frictional force auxiliary brake.

3. The safety system for electric vehicle of claim 2, wherein said safety system is further characterized in that

The air blowing component comprises an air suction port, an air outlet and an air blowing component positioning frame;

the air blowing assembly positioning frame is fixed on the force-borrowing wheel positioning frame and used for positioning the air blowing assembly so as to enable the air blowing assembly and the force-borrowing wheel positioning frame to synchronously slide;

the air suction port and the air outlet are used for air inlet and outlet.

4. The electric vehicle safety system of claim 3, further comprising a cool air generating assembly;

the cold air generating assembly is positioned on the air outlet and used for refrigerating blown air;

the cold air generating assembly comprises an air channel, a refrigerating sheet and a refrigerating sheet power supply assembly;

the refrigerating piece is a semiconductor refrigerating piece and is positioned on the gas channel, and the refrigerating piece power supply assembly supplies power to the refrigerating piece.

5. The safety system for electric vehicles according to claim 3 or 4, further comprising a droplet heat radiating assembly for radiating heat of the motor, the brake block and/or the brake assembly by using condensed water of the air-conditioning water and/or the gas channel;

the liquid drop heat dissipation assembly comprises a liquid collection bin body, a liquid inlet, a swinging blowing nozzle, a liquid storage tank and a liquid outlet channel;

the liquid collection bin body is positioned at the position of the air outlet;

the liquid storage groove is positioned at the bottom of the liquid collection cabin body and used for storing liquid;

the liquid inlet is positioned on the liquid collecting bin body and used for feeding liquid;

the liquid outlet channel is positioned on the liquid collection cabin body;

the swinging air blowing nozzle is positioned in the liquid collection bin body, is communicated with the air outlet, has a swinging function and is used for sprinkling water in the liquid storage tank to the motor, the brake block and/or the brake assembly for heat dissipation through the liquid outlet channel.

6. The electric vehicle safety system of claim 2, further comprising a gas energy storage assembly;

the power source of the gas energy storage assembly is the force borrowing wheel, and the energy stored by the gas energy storage assembly is used for driving the operation of each part of the safety guarantee system of the electric vehicle.

7. The electric vehicle safety system of claim 2 or 6, further comprising

The auxiliary supporting leg assembly is controlled by the controller to operate to avoid the vehicle sliding down the slope when the vehicle slides down the slope;

the auxiliary supporting leg assembly is positioned at the bottom of the frame and comprises a supporting leg main body, a supporting leg positioning assembly and a supporting leg driving assembly; the supporting leg positioning assembly plays a role in fixing the supporting leg main body;

the supporting leg driving assembly is used for driving the supporting leg main body to operate.

8. The electric vehicle safety system of claim 7, wherein the safety system is a vehicle

The main body of the supporting leg is a telescopic supporting leg,

the telescopic supporting legs are fixed on the frame by the supporting leg positioning assembly;

the supporting leg driving assembly drives the telescopic supporting leg to extend and retract;

the auxiliary supporting leg assembly further comprises a supporting leg disc, the supporting leg disc is in ball joint with one end, far away from the frame, of the telescopic supporting leg, and the main body of the auxiliary supporting leg assembly is in a disc shape and is used for fully contacting the auxiliary supporting leg assembly with the ground.

9. The electric vehicle safety system of claim 7, wherein the safety system is a vehicle

The support leg main body is a swing support leg, the support leg positioning assembly is used for fixedly connecting the swing support leg to the frame in a rotatable mode, and the support leg driving assembly is used for driving the swing support leg to rotate;

the auxiliary supporting leg assembly further comprises a floating supporting leg, wherein the main body of the floating supporting leg is in a block shape, and the floating supporting leg is rotatably and fixedly connected to one end, far away from the frame, of the swing supporting leg and is used for enabling the auxiliary supporting leg assembly to be in full contact with the ground.

10. The safety system for electric vehicle of claim 9, wherein said safety system is further characterized in that

The floating support leg also comprises a support leg roller;

the supporting leg roller is rotatably and fixedly connected to one end of the floating supporting leg, and the axial direction of the supporting leg roller is the same as the axial direction of the axle.

Technical Field

The invention relates to the technical field of vehicle manufacturing, in particular to a safety guarantee system of an electric vehicle.

Background

At present, under the trend of the era of vigorously developing new energy, the electric vehicle is deeply loved by common people in plain areas of China. However, in mountainous areas, the use performance is greatly reduced due to high motor failure rate and low reliability of core components of the electric vehicle, and popularization and use in the mountainous areas are greatly influenced.

The load (traction) of the electric vehicle is the sum of rolling resistance, gradient resistance, acceleration resistance and air resistance; the difference of the loads required to be borne by the electric vehicle on the plain and in the mountainous area is that the slope resistance is different, and the slope resistance in the mountainous area is variable; if the gradient is 10-30 degrees, the variable value is 0.17-0.5, and the rolling resistance is 0.05 times of the gravity, the difference between the traction force required by the electric vehicle in the plain area and the traction force required by the electric vehicle in the mountain area is approximately 3-10 times; just by the difference, the failure rate of the motor is high (the motor is demagnetized and the coil is burnt out) when the electric vehicle (tricycle and quadricycle) is used in mountainous areas. When the motor is damaged, namely no power output is carried out, the vehicle can slide backwards instantly to cause safety accidents, and when the vehicle runs downhill and is mechanically braked for a long time, the brake drum can be out of order due to overhigh friction temperature to cause safety accidents.

Disclosure of Invention

The embodiment of the application provides a safety guarantee system for an electric vehicle, and solves the technical problems that in the prior art, when the electric vehicle is used in a mountain area, the failure rate of a motor is high, the brake failure is easy to generate, and the reliability of the electric vehicle is poor due to the gradient; the technical effects of low motor failure rate, reliable braking and high use safety when the electric vehicle is used in mountainous areas are achieved.

The embodiment of the application provides a safety guarantee system of an electric vehicle, which is characterized by comprising a motor, a motor speed sensor, a controller, a gearbox, a rotating handle and a P-gear switch; the motor speed sensor outputs a signal to the controller, the controller detects the rotating speed of the motor constantly, and when the rotating speed of the motor is lower than 2500 rpm, the controller outputs an alarm to prompt a driver to switch to a mechanical gear low gear;

when the vehicle runs down a slope on a steep slope section, a rider can trigger the P-gear switch to output a P-gear signal to the controller, and the controller applies reverse resistance to the motor to assist the mechanical brake to stably pass through the steep slope section.

Preferably, the brake further comprises an auxiliary brake component;

the auxiliary brake assembly comprises an annular brake plate and an auxiliary brake module;

the annular brake plate is characterized in that the main body of the annular brake plate is annular, is fixed on a vehicle wheel and synchronously rotates with the vehicle wheel;

the auxiliary brake module comprises a telescopic rod, a lifting and contracting rod driving component, a rod head bracket, a force borrowing wheel positioning frame, a power transmission component, a blowing component and a brake block;

the telescopic rod is fixed on the frame and plays a role in driving the rod head support to slide along the axial direction of the telescopic rod;

the club head bracket is positioned at one end of the telescopic rod far away from the frame;

the rod head bracket is provided with a sliding groove;

the sliding groove is a through groove, the length direction of the sliding groove is the same as the axial direction of the telescopic rod, and the sliding groove is used for guiding the sliding of the power-assisted wheel positioning frame;

the force-borrowing wheel positioning frame is used for supporting and positioning the force-borrowing wheel, and the force-borrowing wheel positioning frame is positioned on the club head support in a sliding manner along the sliding groove;

the borrowing wheel positioning frame further comprises a sliding inhibition assembly, the sliding inhibition assembly is positioned on the rod head support and used for giving the borrowing wheel positioning frame a tendency of sliding towards the direction of the wheels;

the force-borrowing wheel is positioned on the force-borrowing wheel positioning frame, and the main body of the force-borrowing wheel is in a wheel shape;

when the telescopic rod extends, the force-borrowing wheel props against the annular brake plate and performs autorotation by using friction force;

the power transmission assembly is positioned on the air blowing assembly and is used for transmitting the rotation action of the force borrowing wheel to the air blowing assembly for the air blowing assembly to operate;

the air blowing assembly has the functions of blowing air to the brake assembly, the brake block and/or the motor so as to assist in cooling and improve the reliability of the vehicle;

the main part of brake block be the block, its location is in the pole head support be close to the one end of wheel, during the brake block use, its conflict is in annular brake block on and then through frictional force auxiliary brake.

The preferable air blowing component comprises an air suction port, an air outlet and an air blowing component positioning frame;

the air blowing assembly positioning frame is fixed on the force-borrowing wheel positioning frame and used for positioning the air blowing assembly so as to enable the air blowing assembly and the force-borrowing wheel positioning frame to synchronously slide;

the air suction port and the air outlet are used for air inlet and outlet.

Preferably also comprises a cold air generating assembly;

the cold air generating assembly is positioned on the air outlet and used for refrigerating blown air;

the cold air generating assembly comprises an air channel, a refrigerating sheet and a refrigerating sheet power supply assembly;

the refrigerating piece is a semiconductor refrigerating piece and is positioned on the gas channel, and the refrigerating piece power supply assembly supplies power to the refrigerating piece.

The liquid drop heat dissipation assembly is preferably further comprised, and the motor, the brake block and/or the brake assembly are/is dissipated heat by utilizing condensed water of the air-conditioning water and/or the gas channel;

the liquid drop heat dissipation assembly comprises a liquid collection bin body, a liquid inlet, a swinging blowing nozzle, a liquid storage tank and a liquid outlet channel;

the liquid collection bin body is positioned at the position of the air outlet;

the liquid storage groove is positioned at the bottom of the liquid collection cabin body and used for storing liquid;

the liquid inlet is positioned on the liquid collecting bin body and used for feeding liquid;

the liquid outlet channel is positioned on the liquid collection cabin body;

the swinging air blowing nozzle is positioned in the liquid collection bin body, is communicated with the air outlet, has a swinging function and is used for sprinkling water in the liquid storage tank to the motor, the brake block and/or the brake assembly for heat dissipation through the liquid outlet channel.

Preferably, the gas energy storage component is also included;

the power source of the gas energy storage assembly is the force borrowing wheel, and the energy stored by the gas energy storage assembly is used for driving the operation of each part of the safety guarantee system of the electric vehicle.

The vehicle is characterized by further comprising an auxiliary supporting leg assembly, wherein when the vehicle slips down on a slope, the auxiliary supporting leg assembly is controlled by the controller to operate so as to prevent the vehicle from slipping down on the slope;

the auxiliary supporting leg assembly is positioned at the bottom of the frame and comprises a supporting leg main body, a supporting leg positioning assembly and a supporting leg driving assembly;

the supporting leg positioning assembly plays a role in fixing the supporting leg main body;

the supporting leg driving assembly is used for driving the supporting leg main body to operate.

Preferably the leg body is a telescopic leg,

the telescopic supporting legs are fixed on the frame by the supporting leg positioning assembly;

the supporting leg driving assembly drives the telescopic supporting leg to extend and retract;

the auxiliary supporting leg assembly further comprises a supporting leg disc, the supporting leg disc is in ball joint with one end, far away from the frame, of the telescopic supporting leg, and the main body of the auxiliary supporting leg assembly is in a disc shape and is used for fully contacting the auxiliary supporting leg assembly with the ground.

Preferably, the support leg main body is a swing support leg, the support leg positioning assembly is used for rotatably and fixedly connecting the swing support leg to the frame, and the support leg driving assembly is used for driving the swing support leg to rotate;

the auxiliary supporting leg assembly further comprises a floating supporting leg, wherein the main body of the floating supporting leg is in a block shape, and the floating supporting leg is rotatably and fixedly connected to one end, far away from the frame, of the swing supporting leg and is used for enabling the auxiliary supporting leg assembly to be in full contact with the ground.

Preferably, the floating support leg further comprises a support leg roller;

the supporting leg roller is rotatably and fixedly connected to one end of the floating supporting leg, and the axial direction of the supporting leg roller is the same as the axial direction of the axle.

One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

the safety guarantee system for the electric vehicle is provided, which prompts gear shifting when the rotating speed of the motor is too low in the vehicle uphill process and controls the mechanical brake system to operate when the motor stalls in the vehicle downhill (has a steep descent function); the technical problems that in the prior art, when the electric vehicle is used in a mountainous area, the failure rate of a motor is high, the brake failure is easy to generate and the reliability of the electric vehicle is poor due to the gradient are solved; and further, the technical effects of low motor failure rate, reliable braking and high use safety when the electric vehicle is used in mountainous areas are achieved.

Drawings

FIG. 1 is a flow chart of the operation of the electric vehicle safety guarantee system of the present invention;

FIG. 2 is a schematic diagram of the relationship of the components of the electric vehicle safety system of the present invention;

FIG. 3 is a schematic diagram of the position relationship of the components of the electric vehicle safety guarantee system of the invention;

FIG. 4 is a schematic diagram of the position relationship of the auxiliary leg assembly of the electric vehicle safety system of the present invention;

FIG. 5 is a first schematic structural diagram of an auxiliary brake assembly of the electric vehicle safety guarantee system of the invention;

FIG. 6 is a schematic structural diagram of an annular brake plate of the electric vehicle safety guarantee system of the invention;

FIG. 7 is a schematic structural diagram of an auxiliary brake module of the electric vehicle safety guarantee system of the invention;

FIG. 8 is a schematic structural diagram of a sliding restraining assembly of the electric vehicle safety system of the present invention;

FIG. 9 is a schematic structural view of a head support of the electric vehicle safety system of the present invention;

FIG. 10 is a schematic structural view of a power-assisted wheel positioning frame of the electric vehicle safety guarantee system of the present invention;

FIG. 11 is a cross-sectional view of an auxiliary brake assembly of the electric vehicle safety system of the present invention;

FIG. 12 is a schematic view showing the positional relationship between the extendable rod and the head support of the safety system for an electric vehicle according to the present invention;

FIG. 13 is a schematic structural diagram of a cool air generating assembly of the electric vehicle safety system according to the present invention;

FIG. 14 is a schematic structural view of a liquid drop heat dissipation assembly of the electric vehicle safety system of the present invention;

FIG. 15 is a schematic structural view of a telescopic leg of the electric vehicle safety system of the present invention;

FIG. 16 is a schematic structural view of a swing leg of the electric vehicle safety system of the present invention;

in the figure:

a motor 1, a gear box 2, a rotating handle 3, a P-gear switch 4, a frame 5,

The auxiliary brake assembly 100, the annular brake plate 110, the auxiliary brake module 120, the telescopic rod 121, the telescopic rod driving assembly 122, the rod head bracket 123, the sliding groove 1231, the gravity-assist wheel 124, the gravity-assist wheel positioning frame 125, the restraining sliding assembly 1251, the power transmission assembly 126, the air blowing assembly 127, the air inlet 1271, the air outlet 1272, the air blowing assembly positioning frame 1273, the brake block 128, the telescopic rod 121, the air lifting and contracting rod driving assembly 122, the rod head bracket 123, the air inlet 1271, the air blowing assembly positioning frame 1273,

A cold air generating assembly 200, an air channel 210, a refrigerating sheet 220, a refrigerating sheet power supply assembly 230,

A liquid drop heat radiation component 300, a liquid collecting bin body 310, a liquid inlet 320, a swinging air blowing nozzle 330, a liquid storage tank 340, a liquid outlet channel 350,

An auxiliary leg assembly 400, a leg body 410, a telescoping leg 411, a swing leg 412, a leg positioning assembly 420, a leg drive assembly 430, a leg plate 440, a floating leg 450, a leg roller 451;

Detailed Description

In order to facilitate an understanding of the present invention, the present application will now be described more fully with reference to the accompanying drawings; the preferred embodiments of the present invention are illustrated in the accompanying drawings, but the invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete.

It is noted that the terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

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

Referring to fig. 1, a flow chart of the operation of the electric vehicle safety guarantee system of the present invention is shown; the electric vehicle safety guarantee system comprises a motor 1, a gearbox 2, a rotating handle 3 and a P-gear switch 4; the application provides an electric motor car safety guarantee system that motor speed was crossed when low excessively at the vehicle uphill in-process suggestion shifts, when vehicle downhill path motor stalls (possesses the abrupt slope and slowly falls the function), control mechanical brake system operation.

Example one

As shown in fig. 1 and 2, the electric vehicle safety guarantee system of the present application includes a motor 1, a transmission 2, a rotating handle 3 and a P-shift switch 4; the motor 1 comprises a motor speed sensor and a controller.

The motor speed sensor outputs signals to the controller, the controller detects the rotating speed of the motor constantly, and when the rotating speed of the motor 1 is lower than 2500 rpm, the controller outputs an alarm to prompt a driver to switch to a mechanical gear low gear;

preferably, the motor 1 is a magnetic steel embedded motor, is more suitable for weak magnetic control, and has the characteristics of large torque, high magnetic field intensity, continuous high-temperature operation and stable power output of a system;

preferably, a gyroscope is positioned in the controller, the controller can realize the measurement of the gradient when the vehicle climbs the slope, accurately output control current and output system power, and further realize the operation of the motor with high-efficiency control;

preferably, the high gear ratio of the gearbox 2 is 1: 10-1: 15, and the low gear ratio is 1: 22-1: 30;

preferably, the rotating handle 3 is provided with a three-speed adjusting button, a forward button and a reverse button;

preferably, the controller is controlled by FOC vector algorithm to perform closed-loop control on PID of current, voltage, rotating speed and torque of the whole system, and the functions of the controller include but are not limited to slope slipping prevention, steep descent, third speed, backing, braking, fault indication and instrument speed;

furthermore, the controller has a slope slipping prevention function, when the vehicle slips down on a slope, the rotating handle is loosened, and the vehicle automatically enters the slope slipping prevention function, so that the vehicle slips down slowly, and the safety of personnel and the vehicle is ensured;

the steep descent function of the controller is characterized in that when a vehicle descends on a steep slope section, a riding person can trigger a P-gear switch (a button is enabled to enter a locking state), a P-gear signal is output to the controller, the controller applies reverse resistance to the motor, and the controller assists mechanical braking to stably pass through the steep slope section;

the rotating handle 3 has a three-speed function, a driver triggers high-speed, medium-speed and low-speed buttons of the rotating handle to give signals to the controller, and the controller adjusts the rotating speed of the motor through software so as to control the speed of the vehicle;

preferably, the P-gear switch 4 is a self-locking button, inputs a signal to the controller, and has an anti-misoperation function;

the false touch prevention function specifically comprises: when the electric door lock is in a power-on state, the P gear button is pressed to enable the button to be in a locking state, the vehicle enters a non-driving mode, the P gear is pressed again to enable the button to be in a disconnecting state, and the vehicle can drive; when the electric door lock is in a closed state, the key is not pulled out, and at the moment, the P-gear button is pressed to enable the button to be in a locked state, so that the vehicle is in a non-driving state, and the safety accident caused by the fact that a child mistakenly operates to open the electric door lock to operate the vehicle can be prevented; when the vehicle runs normally, the P gear lock is released.

The gearbox 2 uses a mechanical gear with a speed of 1:10 in plain areas and a mechanical gear with a speed of 1:13 in mountain areas, the motor is subjected to field weakening through a controller, and the rotating speed of the motor 1 is increased, so that the rotating speed of a system is increased; by improving the speed ratio of the rear axle, the power of the system is satisfied, the rotating speed of the motor 1 is weakened, and the speed of the vehicle is improved, so that the requirements of a user on the speed and the power are satisfied.

The technical scheme in the embodiment of the application at least has the following technical effects or advantages:

the technical problems that the failure rate of a motor is high, the brake failure is easy to generate and the reliability of the electric vehicle is poor due to the gradient when the electric vehicle is used in a mountainous area in the prior art are solved; the technical effects of low motor failure rate, reliable braking and high use safety when the electric vehicle is used in mountainous areas are achieved.

Example two

In order to further reduce the probability of brake failure of the electric vehicle and improve the reliability of the electric vehicle; the auxiliary brake assembly 100 is additionally arranged on the basis of the embodiment, and the brake failure probability is reduced by matching the auxiliary brake assembly 100 with a mechanical brake.

The method specifically comprises the following steps: the electric vehicle safety guarantee system also comprises an auxiliary brake assembly 100;

the auxiliary brake assembly 100 is shown in fig. 3 and 5, and includes an annular brake plate 110 and an auxiliary brake module 120;

as shown in fig. 5 and 6, the annular braking plate 110 has an annular main body, and is fixed on a vehicle wheel and rotates synchronously with the vehicle wheel, the axis of the annular braking plate 110 coincides with the axis of an axle, and the annular braking plate 110 is used for cooperating with the auxiliary braking module 120 to increase the braking effect;

as shown in fig. 5 to 12, the auxiliary brake module 120 includes an expansion link 121, an expansion link driving assembly 122, a rod head bracket 123, a force-assisted wheel 124, a force-assisted wheel positioning frame 125, a power transmission assembly 126, an air blowing assembly 127 and a brake block 128;

as shown in fig. 5, the telescopic rod 121 is fixed to the frame 5, and has an axial direction same as that of the axle, so as to drive the rod head support 123 to slide along the axial direction of the telescopic rod 121; preferably, the telescopic rod 121 is an air cylinder; the telescopic rod driving assembly 122 plays a role in driving the telescopic rod 121 to extend and retract;

as shown in fig. 6, the club head support 123 is positioned at an end of the telescopic rod 121 far away from the frame 5, and is used for supporting and positioning the borrowing wheel positioning frame 125, the power transmission assembly 126, the air blowing assembly 127 and the brake block 128; the club head bracket 123 is provided with a sliding groove 1231; the sliding groove 1231 is a through groove, and the length direction thereof is the same as the axial direction of the telescopic rod 121; the sliding groove 1231 is used for guiding the sliding of the borrowing wheel positioning frame 125;

as shown in fig. 10, the borrowing wheel positioning frame 125 is used for supporting and positioning the borrowing wheel 124, and the borrowing wheel positioning frame 125 is slidably positioned on the club head support 123 along the sliding groove 1231;

as shown in fig. 8, further, the wheel alignment rack 125 further includes a restraining slide assembly 1251, the restraining slide assembly 1251 being positioned on the putter head support 123 for giving the wheel alignment rack 125 a tendency to slide toward the wheel; preferably, the sliding suppressing component 1251 is a compression spring, one end of the compression spring is fixed on the borrowing wheel positioning frame 125, the other end of the compression spring is positioned on the club head support 123, and the axial direction of the compression spring is the same as the axial direction of the telescopic rod 121;

as shown in fig. 8 and 9, the borrowing wheel 124 is positioned on the borrowing wheel positioning frame 125, and the main body of the borrowing wheel is wheel-shaped and is axially perpendicular to the axial direction of the telescopic rod 121; when the telescopic rod 121 is extended, the force-borrowing wheel 124 is abutted against the annular brake plate 110, and the rotation is carried out by utilizing the friction force;

as shown in fig. 7, the power transmission assembly 126 is positioned on the air blowing assembly 127, the power transmission assembly 126 is used for transmitting the rotation of the borrowing wheel 124 to the air blowing assembly 127 for the operation of the air blowing assembly 127, and the structure of the power transmission assembly 126 can be belt transmission, gear transmission, chain transmission and the like;

the air blowing assembly 127 plays a role in blowing air (promoting air circulation) to the brake assembly, the brake block 128 and/or the motor 1, so as to assist in heat dissipation and improve the reliability of the vehicle; further, the air blowing assembly 127 comprises an air inlet 1271, an air outlet 1272 and an air blowing assembly positioning frame 1273; the air blowing assembly positioning frame 1273 is fixed on the borrowing wheel positioning frame 125 and is used for positioning the air blowing assembly 127 so that the air blowing assembly 127 and the borrowing wheel positioning frame 125 synchronously slide; the air inlet 1271 and the air outlet 1272 are used for air inlet and outlet;

the main body of the brake block 128 is a block body which is positioned at one end of the club head bracket 123 close to the wheel, and when the brake block 128 is used, the brake block abuts against the annular brake plate 110 to assist braking through friction;

preferably, the brake block 128 is fixed on the club head support 123;

preferably, the brake block 128 is rotatably and fixedly connected to the club head support 123;

when the auxiliary brake assembly 100 actually operates, the telescopic rod 121 is firstly extended, the force-borrowing wheel 124 abuts against the annular brake plate 110, the force-borrowing wheel 124 rotates by means of friction force and transmits power to the air blowing assembly through the power transmission assembly 126 for operation, so as to dissipate heat of the brake assembly, the brake block 128 and/or the motor 1; along with the extension of the telescopic rod 121, the brake block 128 is abutted against the annular brake plate 110 to assist the braking.

Preferably, the motor 1 further comprises a water dispersion system, and the power transmission assembly 126 can transmit power to the water dispersion system of the motor 1 to dissipate heat of the water dispersion system.

Preferably, in order to further improve the heat dissipation effect and avoid the failure of the motor 1, as shown in fig. 13, the safety protection system for electric vehicles further includes a cold air generating assembly 200, where the cold air generating assembly 200 is positioned on the air outlet 1272 and is used for cooling the blown air; further, the cool air generating assembly 200 includes an air channel 210, a cooling plate 220 and a cooling plate power supply assembly 230; the refrigerating plate 220 is a semiconductor refrigerating plate and is positioned on the gas channel 210, and the refrigerating plate power supply assembly 230 supplies power to the refrigerating plate 220.

Preferably, in order to further improve the heat dissipation effect and avoid the failure of the motor 1, as shown in fig. 14, the safety guarantee system for the electric vehicle further includes a droplet heat dissipation assembly 300 for dissipating heat of the motor 1, the brake block 128 and/or the brake assembly by using condensed water of the air-conditioning water and/or the gas channel 210; further, the liquid drop heat dissipation assembly 300 comprises a liquid collection bin body 310, a liquid inlet 320, a swinging air blowing nozzle 330, a liquid storage tank 340 and a liquid outlet channel 350; the liquid collecting cabin body 310 is positioned at the air outlet 1272, and is preferably of a box body structure; the liquid storage tank 340 is positioned at the bottom of the liquid collecting cabin body 310 and is used for storing liquid; the liquid inlet 320 is positioned on the liquid collecting cabin body 310 and used for feeding liquid; the liquid outlet channel 350 is positioned on the liquid collection cabin body 310; the swinging air blowing nozzle 330 is positioned inside the liquid collecting bin body 310, is communicated with the air outlet 1272, has a swinging function, and is used for spraying water in the liquid storage tank 340 to the motor 1, the brake block 128 and/or the brake assembly through the liquid outlet channel 350 for heat dissipation;

preferably, the liquid drop heat dissipation assembly 300 further comprises a water tank for storing and delivering liquid to the sump cartridge body 310.

In order to reduce the cost, preferably, the electric vehicle safety guarantee system further comprises a gas energy storage assembly, the power source of the gas energy storage assembly is the force-assisted wheel 124, and the energy stored by the gas energy storage assembly is used for driving the operation of each component (the telescopic rod 121 and the auxiliary leg assembly 400) of the electric vehicle safety guarantee system.

EXAMPLE III

In order to further improve the practicability of the application and the reliability of the electric vehicle; the embodiment of the present application adds an auxiliary leg assembly 400 on the basis of the above embodiment; when the vehicle slips down on the slope, the controller controls the auxiliary supporting leg assembly 400 to operate so as to prevent the vehicle from slipping down on the slope;

further, as shown in fig. 4, 15 and 16, the auxiliary leg assembly 400 is positioned at the bottom of the frame 5, and includes a leg body 410, a leg positioning assembly 420 and a leg driving assembly 430; the leg positioning assembly 420 functions to fix the leg body 410; the leg driving assembly 430 is used for driving the leg body 410 to operate.

Preferably, as shown in fig. 15, the leg body 410 is a telescopic leg 411,

the leg positioning assembly 420 fixes the telescopic leg 411 on the frame 5;

the leg driving assembly 430 drives the telescopic leg 411 to extend and retract;

the auxiliary leg assembly 400 further comprises a leg disc 440, wherein the leg disc 440 is ball-jointed to one end of the telescopic leg 411, which is far away from the frame 5, and the main body of the auxiliary leg assembly 400 is disc-shaped and is used for fully contacting the ground;

preferably, as shown in fig. 16, the leg body 410 is a swing leg 412, the leg positioning assembly 420 rotatably and fixedly connects the swing leg 412 to the frame 5, and the leg driving assembly 430 is preferably a cylinder for driving the swing leg 412 to rotate; the auxiliary leg assembly 400 further comprises a floating leg 450, wherein the body of the floating leg 450 is in a block shape, and is rotatably and fixedly connected (the rotating shaft is axially identical to the axle) at one end of the swing leg 412 away from the frame 5, so that the auxiliary leg assembly 400 is in full contact with the ground;

preferably, to reduce ground damage during operation of the auxiliary leg assembly 400 and to reduce the energy required to operate the leg drive assembly 430; as shown in fig. 16, the floating foot 450 further includes a foot roller 451; the foot roller 451 is rotatably and fixedly connected to one end of the floating foot 450, and the axial direction of the foot roller is the same as the axial direction of the axle; in actual use, the electric vehicle equipped with the leg roller 451 can be manually pushed forward without the vehicle slipping backward.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.