CN-121993590-A - Electric gear shifting system based on direct-current brush gear motor

Abstract

The invention discloses an electric gear shifting system based on a direct current brush gear motor, and relates to the technical field of racing vehicles; the power control device is used for receiving a gear shifting instruction, generating a motor control signal and cooperating with a whole vehicle ECU (electronic control unit, general control of a vehicle), and comprises a signal input module, a power control module and a control module, wherein the signal input module is used for receiving a gear signal sent by a driver, and the gear signal comprises a neutral gear signal, an upshift signal and a downshift signal; compared with the prior art, the power control device has the beneficial effects that the power control device receives the gear instruction and transmits the gear instruction to the power output device, the power output device is mechanically connected with the engine gear shifting fork shaft through the power transmission device, gear shifting execution is realized, the whole system is used for realizing clutch-free electric gear shifting, a one-key neutral gear function is supported, and the gear shifting is convenient.

Inventors

• LI SHUHUA
• YAN CHANGWEN
• SHI TIANXIANG
• MEI FEI
• LENG YUNPENG
• SU KAI
• REN QIANG

Assignees

• 合肥工业大学

Dates

Publication Date

20260508

Application Date

20260128

Claims (7)

1. 1. The electric gear shifting system based on the direct current brush gear motor is characterized by comprising a power control device, a power output device and a power transmission device; The power control device is used for receiving a gear shifting instruction, generating a motor control signal and cooperating with an ECU of the whole vehicle, and comprises: The signal input module is used for receiving gear signals sent by a driver, wherein the gear signals comprise a neutral gear signal, an upshift signal and a downshift signal; The delay control module is used for receiving the gear signal and outputting a control signal with a set time sequence based on the gear signal; the signal conversion module is used for converting the control signal with the set time sequence into a corresponding motor control voltage signal; The signal output module is used for sending a gear signal to the ECU; The power take off for drive shift action according to motor control voltage signal, it includes: The motor controller is used for receiving a motor control voltage signal and outputting motor driving current; a gear motor for outputting rotational movement required for gear shifting based on motor driving current; the voltage conversion module is used for boosting the whole vehicle power supply to the working demand voltage of the motor controller; a power transmission device for transmitting rotational motion to an engine shift fork, comprising: The motor end connecting piece is used for being fixed on an output shaft of the speed reducing motor; the engine end connecting piece is used for being fixed on an engine shifting fork shaft; the mechanical connecting piece is used for rigidly connecting the motor end connecting piece with the engine end connecting piece; The output end of the signal input module is respectively connected with the input end of the delay control module and the input end of the signal output module, the output end of the delay control module is connected with the input end of the signal conversion module, the output end of the signal conversion module is connected with the input end of the motor controller, the output end of the motor controller is connected with the input end of the gear motor, the output end of the signal output module is connected with the ECU, and the output end of the voltage conversion module is connected with the power end of the motor controller.
2. 2. The electric shift system based on the direct current brush gear motor according to claim 1, wherein the engine end connecting piece is a second flange plate, the second flange plate is fixedly connected with the engine shift fork shaft, and spline parts of the fork shaft are cut off before fixing, so that space utilization and centering are guaranteed.
3. 3. The electric shift system based on the direct current brush gear motor according to claim 1, wherein the voltage conversion module is a 12V to 24V inverter, and the output current of the 12V to 24V inverter is not less than 45A to meet the operating current requirement of the motor controller.
4. 4. The direct-current brush-based gear shifting system according to claim 1, wherein the gear-reduction motor has a reduction ratio of 400, an output torque of not less than 30NM, and a no-load rotation speed of not less than 95r/min.
5. 5. The direct current brush-based electric shift system of claim 1, wherein the delay control module includes 4 yc-2S delay relays, the yc-2S delay relays employing a P-35 mode of operation.
6. 6. The electric gear shifting system based on the direct-current brush gear motor according to claim 1, wherein the signal conversion module is a voltage dividing circuit formed by adjustable resistors, and the adjustable resistors with resistance values not smaller than 5KΩ are adopted.
7. 7. The direct current brushed gear reduction motor-based electric shift system of claim 4, wherein the gear reduction motor is secured to the frame body by a rigid structure.

Description

Electric gear shifting system based on direct-current brush gear motor Technical Field The invention relates to the technical field of racing vehicles, in particular to an electric gear shifting system based on a direct-current brush gear motor. Background Since the 1981, the FSAE race has been played in more than twenty countries such as China, germany, and the United states, and the university equation automobile race has been played. The first China university student equation automobile racing in 2010 is held at Shanghai International racing yards, and by 2022, more than one hundred teams in China are in competition. According to the rules of the university of China equation of the large race, a gear shifting device of a racing car only needs to be fixed with a frame. However, since the engine displacement is limited to 710cc, almost all motorcades use motorcycle engines as a power source. Therefore, no mature and stable commercial gear shifting device can be directly adopted. Almost all of the existing college student equation racing motorcades adopt pneumatic gear shifting systems, namely, a cylinder is driven by a gas cylinder filled with high-pressure gas so as to push a gear shifting fork of an engine. Such a gear shifting system, while simple to install and low in threshold, requires frequent disassembly and assembly of the gas cylinder for inflation. Because the gas thrust is relatively uncontrollable, the gear shifting success rate is poor and the stability is low, the neutral gear of the motorcycle engine is between the first gear and the second gear, the pneumatic gear shifting system cannot accurately be hung into the neutral gear, the extremely high weight is not in accordance with the trend of gradually lightening the formula racing car, and a small number of motorcades adopt pure mechanical gear shifting systems, namely the engine gear shifting fork is connected with a gear shifting lever in a cockpit through a pull wire, one hand of a driver is required to be separated from a steering wheel during gear shifting in the mode, the gear shifting lever can be pushed by using larger force, the gear shifting time is difficult to grasp, the gear shifting speed is relatively slow, and the fatigue of the driver is easily caused by frequent gear shifting. In summary, the existing gear shifting systems adopted by the college student equation racing motorcades all have the problem of inconvenient gear shifting, and improvement is needed. Disclosure of Invention The invention aims to provide an electric gear shifting system based on a direct-current brush gear motor, so as to solve the problems in the background art. In order to achieve the above purpose, the present invention provides the following technical solutions: An electric gear shifting system based on a direct current brush gear motor comprises a power control device, a power output device and a power transmission device; the power control device is used for receiving a gear shifting instruction, generating a motor control signal and cooperating with an entire vehicle ECU (electronic control unit, general control of the vehicle), and comprises: the signal input module (comprising a neutral gear signal input device and a lifting gear signal input device from a rider) is used for receiving gear signals sent by the rider, wherein the gear signals comprise a neutral gear signal, an upshift signal and a downshift signal; The delay control module (4 YYC-2S delay relays) is used for receiving the gear signal and outputting a control signal with a set time sequence based on the gear signal; The signal conversion module (a voltage division circuit formed by adjustable resistors) is used for converting a control signal with a set time sequence into a corresponding motor control voltage signal; The signal output module (specifically, a lifting gear signal output device sent to the ECU) is used for sending a gear signal to the ECU; The power take off for drive shift action according to motor control voltage signal, it includes: A motor controller (specifically, an APO-B3 motor controller) for receiving a motor control voltage signal and outputting a motor drive current; the speed reducing motor (particularly a 775 motor and a matched speed reducer) is used for outputting rotary motion required by gear shifting based on motor driving current; The voltage conversion module (specifically, a 12V-to-24V inverter) is used for boosting the power supply (12V) of the whole vehicle to the working demand voltage (24V) of the motor controller; a power transmission device for transmitting rotational motion to an engine shift fork, comprising: the motor end connecting piece (specifically a first flange plate and made of aluminum) is used for being fixed on an output shaft of the speed reducing motor; the engine end connecting piece (particularly a second flange plate and made of aluminum) is used for being fixed on the engine shifting fork shaft; a mechanical connecto