Automobile magnetic and frictional compound brake based on magnetic and frictional coupling effect

Abstract

The invention discloses an automobile magnetic and frictional compound brake based on a magnetic and frictional coupling effect. Excitation coils wind the surfaces of both a left backboard and a right backboard, through holes are formed in the surface of the left backboard, deep holes are formed in one side surface of a left friction plate, sensors are arranged in the deep holes of the left friction plate, the left backboard is fixed onto a brake caliper body, and the left friction plate is connected with the left backboard and clung to the surface of the left side of a brake disc; deep holes are also formed in the surface of a right friction plate, a through groove is formed in one side surface of the right backboard, sensors are placed in the deep holes of the right friction plate, the right friction plate is connected with the right backboard, the right backboard is fixed onto a piston body, and the piston body is fixed to the brake caliper body via a bolt; a sensor bearing body is welded on the upper surface of the brake caliper body, and a sensor is arranged in the sensor bearing body; all the sensors are electrically connected with a computer. By virtue of the positive effect on friction behavior from a magnetic field, the automobile magnetic and frictional compound brake improves the frictional braking performance, monitors the important state parameters in real time, timely feeds back and adjusts abnormal situations in the braking process, and improves the stability and reliability of a braking system.

Description

technical field [0001] The invention relates to a brake, in particular to an automobile magnetic-friction composite brake based on the magnetic-friction coupling effect. Background technique [0002] The braking system is an important part of the car structure, and plays a vital role in ensuring the normal driving of the car and the safety of the drivers. With the continuous development of automobile industry technology, disc brakes have been widely used in the field of automobile braking due to their simple structure, excellent braking effect and good stability. However, since disc brakes mainly rely on the friction between the friction plate and the brake disc to achieve deceleration and stop, excessive friction temperature rise will often lead to thermal fading, and unstable brake pressure and excessive load will aggravate the friction of the friction plate. wear, which has a decisive impact on the braking performance of the brake. [0003] As a form of non-contact brak...

AI Technical Summary

Problems solved by technology

However, automobile electromagnetic braking also has the following disadvantages: 1) Most of the existing applications of electromagnetic braking are to install electromagnetic retarding devices on the axles of automobiles, forming a system mainly based on friction braking and supplemented by electromagnetic retarding. This not only makes the structure more complicated, but also greatly increases the manufacturing cost; 2) Although there are also modifications and addition of excitation coils on the basis of the original structure of the brake, only two braking methods, friction and electromagnetic, are considered. The simple superposition of the two braking modes and the simple switching of the two braking modes completely ignore the interaction and influence between the magnetic field and the friction; 3) The friction state is a key factor affecting the braking performance of the car, but there are few existing braking systems Real-time monitoring of important parameters in the braking process, and automatic and accurate feedback adjustment under abnormal conditions

For example, the search found that patents CN102128227A and CN102287460A have respectively designed a set of brake mechanisms integrating electromagnetic and permanent magnets on the original brake, and patent CN102691737A discloses a double brake disc brake, although it can be controlled according to different speed conditions. The combination of friction and magnetic braking methods, but this kind of design not only makes the mechanical structure very complicated, but also does not consider the coupling effect between magnetic field and friction, and does not involve the monitoring and feedback adjustment of braking parameters; patent Although CN104482080A proposes to install sensors to monitor the brake pressure and speed, it is only for controlling the start and stop of different brake modes

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