Kinetic energy recovery mountain bike braked by three-stage brake

Abstract

The utility model discloses a three-level braking kinetic energy recovery mountain bike which comprises a bike body, wheels, an energy recovery module and a braking module, the energy recovery module comprises a control switch, an electric telescopic rod, a brush direct current motor, a rectification voltage stabilizing circuit and an energy storage system, and the control switch is used for controlling the electric telescopic rod to stretch out and draw back. The brush direct-current motor is fixed to the output end of the electric telescopic rod, the friction wheel is fixed to the output end of the brush direct-current motor, when the electric telescopic rod extends, the friction wheel makes contact with the wheel, the wheel rotates to drive the friction wheel to rotate, and the brush direct-current motor receives wheel braking kinetic energy through the friction wheel and converts the wheel braking kinetic energy into electric energy. The converted electric energy is stored in the energy storage system through the rectifying and voltage stabilizing circuit; and the energy recovery module and the braking module realize three-stage braking. Energy is recovered while braking is conducted through the friction wheels, the safety performance is improved based on a three-level braking mode of the friction wheels, safe braking is ensured in emergency, and the device adapts to various riding environments.

Description

TECHNICAL FIELD

[0001] The utility model relates to a mountain bike, concretely relates to a mountain bike of kinetic energy recovery of three -stage brake braking. BACKGROUND

[0002] Mountain bike in the riding process, especially in the downhill or bumpy section, frequent brake can lead to a large amount of kinetic energy through the brake pad friction conversion into heat energy and dissipate.There is a kind of brake energy recovery control system based on STC15F2K60S2 kernel single-chip microcomputer in the prior art to the problem of energy loss caused by frequent braking of bicycle, mainly concentrates on the design idea of electric bicycle brake energy recovery system, lacks the attempt of combination of theory and practice, and as the system designed at present includes brake energy recovery system and driving power system, does not contain external power charging system, reduces mechanical braking loss, but the control system has problems, the energy loss of system hardware is more, there is power generation using brake pad or frame and environmental temperature difference, but its efficiency is extremely low, is still in the laboratory stage, and as shock absorber energy recovery converts the energy compressed by shock absorber into electric energy or gas pressure potential energy (such as MotionEco concept design), but the energy conversion rate is low and the system weight increases significantly, and cannot adapt to the special use scene of mountain bike jolt. UTILITY MODEL CONTENTS

[0003] The utility model provides a mountain bike of kinetic energy recovery of three -stage brake braking of adaptation different road conditions.

[0004] Technical scheme: in order to solve the above problems, the utility model adopts a mountain bike of kinetic energy recovery of three -stage brake braking, including car body, wheel, energy recovery module and brake module, the energy recovery module includes control switch, electric telescopic rod, brush DC motor, rectifier voltage stabilizing circuit, energy storage system, the control switch is used to control the expansion of electric telescopic rod, and the fixed end of electric telescopic rod is fixed on the car body, and the brush DC motor is fixed on the output end of electric telescopic rod, the brush DC motor output end fixed friction wheel, when electric telescopic rod lengthens, friction wheel contacts wheel, and wheel is braked to first level, and wheel rotation drives friction wheel rotation, and brush DC motor receives the brake kinetic energy of wheel through friction wheel and converts into electric energy, and the converted electric energy is stored in energy storage system through rectifier voltage stabilizing circuit;When electric telescopic rod lengthens, brake module is opened simultaneously and is braked to second level;When electric telescopic rod contracts, brake module is independently braked to third level.

[0005] Further, the rectifier and voltage stabilizing circuit comprises a three-phase bridge rectifier and a DC / DC step-up and step-down chopper, the output voltage range of the DC / DC step-up and step-down chopper is set as 36V±5%, the three-phase bridge rectifier is used for converting the alternating current generated by the brush DC motor into direct current, and the DC / DC step-up and step-down chopper is used for converting the input direct current voltage into the set output direct current voltage.

[0006] Further, the energy storage system comprises a super capacitor and a lithium battery pack, and the super capacitor is connected between the rectifier and voltage stabilizing circuit and the lithium battery pack.

[0007] Further, the super capacitor and the lithium battery pack are packaged in a separate detachable energy storage box, the energy storage box is connected with the rectifier and voltage stabilizing circuit through a standardized interface, and is provided with a USB output port and can supply power to external equipment.

[0008] Further, the control module comprises a main control chip, a sensor unit and a man-machine interaction unit, the sensor unit is used for collecting mountain bike data and environmental data in real time, the main control chip is used for obtaining the energy storage state of the energy storage system based on the data collected by the sensor unit, and the man-machine interaction unit is used for displaying the energy storage state of the energy storage system.

[0009] Further, the sensor unit comprises a Hall speed sensor, an inclinometer, a brake handle opening degree sensor and a temperature sensor, the Hall speed sensor is used for collecting real-time speed, the inclinometer is used for detecting road slope, the brake handle opening degree sensor is used for collecting brake intensity, and the temperature sensor is used for collecting battery pack temperature and MOS tube temperature.

[0010] Further, the rectifier and voltage stabilizing circuit comprises a battery protection circuit, which is used for battery overcharge protection, battery overdischarge protection, battery discharge overcurrent protection, short circuit protection and battery charging overcurrent protection.

[0011] Advantages of the utility model relative to prior art are that: energy is recycled while braking through the friction wheel, the three-stage brake mode based on the friction wheel improves safety performance, ensures safe braking in emergency, adapts to various riding environments, and improves use performance and safety. The energy storage system provides outdoor emergency power supply function and meets outdoor demand. The brake mode, energy storage device and circuit assembly of the mountain bike are redesigned under the premise of ensuring safety, meet the emergency power supply demand of outdoor small equipment. The super capacitor and the lithium battery pack are used in parallel, prolonging the energy storage life. The modular design facilitates maintenance and replacement. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is the structure schematic view of the kinetic energy recovery mountain bike in the utility model;

[0013] Figure 2 is a kinetic energy recovery principle flow diagram of the kinetic energy recovery mountain bike system of the utility model;

[0014] Figure 3 is the rectifier voltage stabilizing circuit of the utility model;

[0015] Figure 4 is the charging circuit of the utility model;

[0016] Figure 5 is the battery protection circuit of the utility model;

[0017] Figure 6 is the 3.3V voltage stabilizing circuit of the utility model;

[0018] Figure 7 is the hardware module block diagram of the utility model. DETAILED DESCRIPTION

[0019] As Figure 1 shown, the kinetic energy recovery mountain bike of a three-stage brake in the embodiment, including car body 1, wheel 2, energy recovery module, brake module 8 and control module, energy recovery module includes control switch 3, electric telescopic rod 4, brush DC motor 5, rectifier voltage stabilizing circuit, energy storage system 6, control switch 3 is used to control the telescopic of electric telescopic rod 4, electric telescopic rod 4 fixed end is fixed on car body 1, brush DC motor 5 is fixed on the output end of electric telescopic rod 4, brush DC motor 4 output end fixed friction wheel 7, as Figure 2 shown, when electric telescopic rod 4 is lengthened, friction wheel 7 contacts wheel 2, and wheel 2 is braked, and wheel 2 rotates and drives friction wheel 7 to rotate, and brush DC motor 5 receives the brake kinetic energy of wheel 2 through friction wheel 7 and converts it into electric energy, and the converted electric energy is stored in energy storage system 6 through rectifier voltage stabilizing circuit;When electric telescopic rod 4 is lengthened, brake module 8 is opened simultaneously and performs secondary braking;When electric telescopic rod 4 is retracted, brake module 8 independently performs three-stage braking. Brake module is the disc brake mechanical brake of mountain bike.

[0020] As Figure 3 shown, rectifier voltage stabilizing circuit includes three-phase bridge rectifier, DC / DC boost-buck chopper and battery protection circuit, and the output voltage range of DC / DC boost-buck chopper is set to 36V±5%, which is suitable for the charging demand of super capacitor and lithium battery pack. Three-phase bridge rectifier is used to convert the alternating current generated by brush DC motor into direct current, and DC / DC boost-buck chopper is used to convert the input direct current voltage into the set output direct current voltage. As Figure 4 shown, 5V charging circuit charges energy storage system. As Figure 5 shown, battery protection circuit is used for battery overcharge protection, battery overdischarge protection, battery discharge overcurrent protection, short circuit protection and battery charging overcurrent protection. AsFigure 6 As shown, the main control chip is powered through a 3.3V voltage regulator circuit, which outputs a fixed 3.3V.

[0021] like Figure 7 As shown, the control module includes a main control chip, sensor units, and a human-machine interface unit 9. The sensor units are used to collect real-time data from the mountain bike and the environment. The main control chip is used to determine the energy storage status of the energy storage system based on the data collected by the sensor units. The main control chip communicates with each sensor via a CAN bus. The human-machine interface unit is used to display the energy storage status of the energy storage system. The sensor units include a Hall effect vehicle speed sensor, an inclinometer, a brake lever opening sensor, and a temperature sensor. The Hall effect vehicle speed sensor is used to collect real-time vehicle speed, the inclinometer is used to detect road gradient, the brake lever opening sensor is used to collect braking intensity, and the temperature sensor is used to collect battery pack temperature and MOSFET temperature.

[0022] The energy storage system comprises a supercapacitor and a lithium battery pack, with the supercapacitor connected between the rectifier and voltage regulator circuit and the lithium battery pack. A brushed DC motor receives braking kinetic energy from the wheels via a friction wheel and converts it into alternating current (AC). This AC is then rectified and regulated back into DC before being stored in the supercapacitor. The supercapacitor and lithium battery pack are connected in parallel to form a dual energy storage system. The energy storage box is mounted on the downtube of the mountain bike frame and is quickly installed and removed using a snap-on fixing mechanism. The outer shell of the energy storage box is waterproof and shockproof, with an IP67 protection rating.

[0023] The aforementioned energy recovery mountain bike employs a three-level braking system to adapt to different road conditions. The three-level braking system includes:

[0024] Level 1 braking mode: On long, gentle slopes, the brushed DC motor works independently, converting mechanical energy into electrical energy for storage through electromagnetic braking;

[0025] Two-stage braking mode: On bumpy roads, the brushed DC motor and disc brake mechanical brake work together to achieve deceleration and stopping.

[0026] Three-level braking mode: In an emergency, the disc brake mechanical brake works independently to ensure safe braking.

[0027] The energy recovery module adopts a modular design, with the supercapacitor and lithium battery pack packaged in an independent and detachable energy storage box. The energy storage box is connected to the rectifier and voltage regulator circuit through a standardized interface and is equipped with a USB output port to power external devices.

Claims

1. A kinetic energy recovery mountain bike with three-stage brake braking, characterized in that, The mountain bike comprises a vehicle body (1), a wheel (2), an energy recovery module and a brake module (8), the energy recovery module comprises a control switch (3), an electric telescopic rod (4), a brush DC motor (5), a rectifier and voltage stabilizer circuit and an energy storage system (6), the control switch (3) is used for controlling the telescoping of the electric telescopic rod (4), the fixed end of the electric telescopic rod (4) is fixed on the vehicle body (1), the brush DC motor (5) is fixed on the output end of the electric telescopic rod (4), the output end of the brush DC motor (5) is fixed with a friction wheel (7), when the electric telescopic rod (4) is elongated, the friction wheel (7) contacts the wheel (2) to brake the wheel (2) at a first level, and the rotation of the wheel (2) drives the rotation of the friction wheel (7), the brush DC motor (5) receives the braking kinetic energy of the wheel (2) through the friction wheel (7) and converts the braking kinetic energy into electric energy, and the converted electric energy is stored in the energy storage system (6) through the rectifier and voltage stabilizer circuit; when the electric telescopic rod (4) is elongated, the brake module (8) is started to brake at a second level; when the electric telescopic rod (4) is retracted, the brake module (8) independently brakes at a third level.

2. The kinetic energy recovery mountain bike of claim 1, wherein, The rectifier and voltage stabilizer circuit comprises a three-phase bridge rectifier and a DC / DC boost-buck chopper, the output voltage range of the DC / DC boost-buck chopper is set to 36V±5%, the three-phase bridge rectifier is used for converting the alternating current generated by the brush DC motor into direct current, and the DC / DC boost-buck chopper is used for converting the input direct current voltage into the set output direct current voltage.

3. The kinetic energy recovery mountain bike of claim 2, wherein, The energy storage system comprises a super capacitor and a lithium battery pack, and the super capacitor is connected between the rectifier and voltage stabilizer circuit and the lithium battery pack.

4. The kinetic energy recovery mountain bike of claim 3, wherein, The super capacitor and the lithium battery pack are packaged in an independent detachable energy storage box, the energy storage box is connected with the rectifier and voltage stabilizer circuit through a standardized interface, and is provided with a USB output port to supply power to external devices.

5. The kinetic energy recovery mountain bike of claim 3, wherein, The control module comprises a main control chip, a sensor unit and a man-machine interaction unit, the sensor unit is used for collecting real-time mountain bike data and environmental data, the main control chip is used for obtaining the energy storage state of the energy storage system based on the data collected by the sensor unit, and the man-machine interaction unit is used for displaying the energy storage state of the energy storage system.

6. The kinetic energy recovery mountain bike of claim 5, wherein, The sensor unit comprises a Hall speed sensor, an inclinometer, a brake handle opening degree sensor and a temperature sensor, the Hall speed sensor is used for collecting real-time speed, the inclinometer is used for detecting road slope, the brake handle opening degree sensor is used for collecting brake intensity, and the temperature sensor is used for collecting battery pack temperature and MOS tube temperature.

7. The kinetic energy recovery mountain bike of claim 5, wherein, The rectifier and voltage stabilizer circuit comprises a battery protection circuit, and the battery protection circuit is used for battery overcharge protection, battery overdischarge protection, battery discharge overcurrent protection, short circuit protection and battery charging overcurrent protection.

Images