阅读说明：本技术 一种增力式线控制动器 (Reinforcement type line control ware ) 是由 张竹林 王金波 蒋德飞 邹彦冉 阮帅 许本博 于 2021-01-29 设计创作，主要内容包括：本发明涉及一种增力式线控制动器,采用模块化设计,包括制动盘、左摩擦片、右摩擦片、卡钳、缸体、电磁线圈总成、磁致伸缩棒、调整螺栓、楔块、活塞、橡胶圈；所述的电磁线圈总成、磁致伸缩棒组成磁致伸缩致动器；车辆制动时,车辆控制器控制电磁线圈中的电流大小来改变磁场的强弱,进而控制磁致伸缩棒的伸长长度,磁致伸缩棒伸长时,推动楔块向前移动,楔块上的楔面压紧并推动活塞移动,活塞压紧右摩擦片,在左摩擦片、右摩擦片共同作用下产生制动力矩；本发明采用磁致伸缩致动器作为制动器的动力源,结合楔式增力机构,具有较高的响应频率和控制精度,能够有效缩短制动距离,提高车辆行驶安全性。(The invention relates to a reinforcement type wire control actuator which adopts a modular design and comprises a brake disc, a left friction plate, a right friction plate, calipers, a cylinder body, an electromagnetic coil assembly, a magnetostrictive rod, an adjusting bolt, a wedge block, a piston and a rubber ring, wherein the left friction plate and the right friction plate are arranged on the brake disc; the electromagnetic coil assembly and the magnetostrictive rod form a magnetostrictive actuator; when a vehicle is braked, a vehicle controller controls the current in an electromagnetic coil to change the strength of a magnetic field so as to control the extension length of a magnetostrictive rod, when the magnetostrictive rod extends, a wedge block is pushed to move forwards, a wedge surface on the wedge block compresses and pushes a piston to move, the piston compresses a right friction plate, and a braking torque is generated under the combined action of the left friction plate and the right friction plate; the invention adopts the magnetostrictive actuator as the power source of the brake, combines the wedge type force-increasing mechanism, has higher response frequency and control precision, can effectively shorten the braking distance and improve the running safety of the vehicle.)

1. A power-boosting brake-by-wire characterized in that: the brake disc adopts a modular design and comprises a brake disc (1), a left friction disc (2), a right friction disc (3), calipers (4), a cylinder body (5), an electromagnetic coil assembly (6), a magnetostrictive rod (7), an adjusting bolt (8), a wedge block (9), a piston (10) and a rubber ring (11); the electromagnetic coil assembly (6) and the magnetostrictive rod (7) form a magnetostrictive actuator;

the brake disc (1) is connected with an axle bolt, the left friction plate (2) and the right friction plate (3) are respectively installed on the left side and the right side of the brake disc (1), and the left friction plate (2) and the right friction plate (3) are respectively installed in an adaptive groove on the caliper (4) through back steel sheets on the left friction plate and the right friction plate to carry out rotation limiting; the calipers (4) are fixedly arranged on a vehicle body; the cylinder body (5) is fixedly connected with the caliper (4); the piston (10) is sleeved in the cylinder body (5), the left end face of the piston (10) is in contact with the back steel sheet surface on the right friction plate (3), and the right wedge surface of the piston (10) is in contact with the wedge surface of the wedge block (9); the rubber ring (11) is arranged in annular notches of the piston (10) and the cylinder body (5) and is used for assisting the piston (10) to reset after braking is finished so as to ensure braking gaps among the left friction plate (2), the right friction plate (3) and the brake disc (1); the wedge block (9) is fixedly connected with the magnetostrictive rod (7), and the wedge block (9) is guided and limited through notches in electromagnetic brackets (601) in the cylinder body (5) and the electromagnetic coil assembly (6); a return spring is also arranged on the wedge block (9) to prevent the wedge block (9) from being wedged;

the electromagnetic coil assembly (6) comprises an electromagnetic bracket (601) and an electromagnetic coil (602); the electromagnetic coil (602) is fixedly sleeved on the electromagnetic bracket (601); the electromagnetic bracket (601) is fixedly arranged on the cylinder body (5); the magnetostrictive rod (7) is sleeved in the electromagnetic support (601), one end of the magnetostrictive rod (7) is fixedly connected with the wedge block (9), and the other end of the magnetostrictive rod is in surface contact with the adjusting bolt (8); the adjusting bolt (8) is installed at the tail of the electromagnetic support (601), the position of the magnetostrictive rod (7) is adjusted and the magnetostrictive rod (7) is supported by rotating the adjusting bolt (8), the relative contact position of the wedge block (9) and the piston (10) is adjusted by adjusting the position of the magnetostrictive rod (7), and then the position of the piston (10) is adjusted to compensate for the increase of the braking clearance of the left friction plate (2) and the right friction plate (3) caused by braking abrasion; the electromagnetic coil (602) is electrically connected with a vehicle controller.

Technical Field

The invention relates to the field of automobile brakes, in particular to a reinforcement type line control brake.

Background

The brake-by-wire technology is a novel brake technology appearing in recent years, a brake and a brake pedal do not depend on mechanical or hydraulic connection, a part of or all brake pipelines are replaced by electric wires, and an electric control element is operated by a controller to control the magnitude of braking force, so that the stable and reliable brake control of an automobile is realized. At present, the brake-by-wire system mainly comprises an electronic hydraulic brake system (EHB) and an electronic mechanical brake system (EMB). The brake-by-wire system is beneficial to optimizing the braking performance of the whole vehicle, and can be conveniently integrated with other electronic control systems such as ABS, ASR, ESP and the like, so that the system has wide development space. Especially as a brake system for an unmanned vehicle, is considered to be better by those skilled in the art.

The electronic hydraulic brake system (EHB) is formed by transforming the traditional hydraulic brake system, the braking process is quicker and more stable, the braking safety and the comfort of an automobile are improved, but the electronic hydraulic brake system does not have all the advantages of a complete brake-by-wire system because a hydraulic component is reserved, and is generally regarded as an advanced product of an electronic mechanical brake system (EMB). The original hydraulic pipeline is reserved, and the technical problem of slow brake response caused by long hydraulic pipeline is still not solved. Meanwhile, the brake pipeline can be elastically deformed under the action of high-pressure brake oil, so that the pressure fluctuation of the brake oil in the brake pipeline is caused, and the accurate control of the vehicle brake is greatly influenced.

The technical scheme of the prior electronic mechanical brake system (EMB) is that a motor drives a mechanical mechanism to realize a braking process, so that the structure of the brake system is greatly simplified, and the brake is easier to arrange, assemble and overhaul. The existing electronic mechanical brake system mostly adopts a brake motor and a speed reducing mechanism or a force increasing mechanism as power sources, so that the overall structure size is larger. In the braking process, the braking motor is always in a locked-rotor state, so that the requirement on the performance of the braking motor is high. In order to ensure enough braking torque, the main technical scheme adopted at present is a motor acceleration and deceleration mechanism, but the deceleration mechanism can cause slow braking response and increase the braking distance of a vehicle.

Along with the popularization of new energy vehicles and intelligent vehicles, an electronic mechanical brake system is inevitably widely applied, the problems of high performance indexes and high price of a motor caused by the fact that an EMB installation space and a brake motor are in a locked-rotor state for a long time are solved, and the problem that a deceleration mechanism causes slow brake response is solved urgently.

Disclosure of Invention

Aiming at the defects of the existing brake-by-wire system, the invention provides a force-increasing brake-by-wire, which adopts a magnetostrictive actuator as a power source of the brake and combines a wedge type force increasing mechanism, thereby having higher response frequency and control precision, effectively shortening the braking distance and improving the running safety of vehicles.

The invention is realized by the following technical measures:

a reinforcement type wire control actuator adopts a modular design and comprises a brake disc, a left friction plate, a right friction plate, calipers, a cylinder body, an electromagnetic coil assembly, a magnetostrictive rod, an adjusting bolt, a wedge block, a piston and a rubber ring; the electromagnetic coil assembly and the magnetostrictive rod form a magnetostrictive actuator;

the brake disc is connected with the axle bolt, the left friction plate and the right friction plate are respectively arranged on the left side and the right side of the brake disc, and the left friction plate and the right friction plate are respectively arranged in an adaptive groove on the caliper through back steel sheets on the left friction plate and the right friction plate so as to carry out rotation limiting; the calipers are fixedly arranged on a vehicle body; the cylinder body is fixedly connected with the calipers; the piston is sleeved in the cylinder body, the left end surface of the piston is in contact with the back steel sheet surface on the right friction plate, and the wedge surface of the right end of the piston is in contact with the wedge surface of the wedge block; the rubber ring is arranged in the annular notches of the piston and the cylinder body and is used for assisting the piston to reset after braking is finished so as to ensure braking gaps among the left friction plate, the right friction plate and the brake disc; the wedge block is fixedly connected with the magnetostrictive rod and is guided and limited through the notches on the electromagnetic bracket in the cylinder body and the electromagnetic coil assembly; the wedge block is also provided with a return spring to prevent the wedge block from being wedged;

the electromagnetic coil assembly comprises an electromagnetic bracket and an electromagnetic coil; the electromagnetic coil is fixedly sleeved on the electromagnetic bracket; the electromagnetic bracket is fixedly arranged on the cylinder body; the magnetostrictive rod is sleeved in the electromagnetic support, one end of the magnetostrictive rod is fixedly connected with the wedge block, and the other end of the magnetostrictive rod is in surface contact with the adjusting bolt; the adjusting bolt is arranged at the tail of the electromagnetic support, the position of the magnetostrictive rod is adjusted and supported by rotating the adjusting bolt, the relative contact position of the wedge and the piston is adjusted by adjusting the position of the magnetostrictive rod, and then the position of the piston is adjusted to compensate for the increase of the braking clearance of the left friction plate and the right friction plate caused by braking abrasion; the electromagnetic coil is electrically connected with a vehicle controller.

The invention has the beneficial effects that:

a force-increasing type line control actuator adopts a magnetostrictive actuator as a power source of the actuator, is combined with a wedge type force-increasing mechanism, has higher response frequency and control precision, effectively shortens the braking distance and improves the running safety of a vehicle.

After the technical scheme is adopted, compared with the prior art, the invention has the following beneficial effects:

1. the magnetostrictive actuator is used as a power source, and a wedge type force-increasing structure is combined, so that a driving motor and a speed reducing mechanism in the prior art are eliminated, the braking response speed is effectively improved, and the installation space is reduced;

2. the brake-by-wire mode is adopted, so that system integration with ABS, EBD and the like is facilitated, and higher control precision is achieved;

3. the conventional hydraulic brake adopts an 'on-off' regulation mode of pressurization, pressure maintaining and pressure reduction when wheels are locked, and the hydraulic brake has the advantages of continuous adjustability and higher control precision.

Drawings

The invention is further illustrated with reference to the following figures and examples.

Fig. 1 is a front view of the present invention.

Fig. 2 is a schematic structural diagram of the present invention.

Fig. 3 is a partial structural schematic diagram of the present invention.

Fig. 4 is a partial structural schematic diagram of the present invention.

Fig. 5 is a schematic view of the piston structure of the present invention.

FIG. 6 is a schematic view of a caliper structure according to the present invention.

Fig. 7 is a schematic structural view of the cylinder body of the present invention.

Fig. 8 is a sectional view of the cylinder structure of the present invention.

FIG. 9 is a schematic diagram of a solenoid assembly according to the present invention.

In the figure, 1-a brake disc, 2-a left friction disc, 3-a right friction disc, 4-a caliper, 5-a cylinder body, 6-an electromagnetic coil assembly, 601-an electromagnetic bracket, 602-an electromagnetic coil, 7-a magnetostrictive rod, 8-an adjusting bolt, 9-a wedge block, 10-a piston and 11-a rubber ring.

Detailed Description

In order to clearly illustrate the technical features of the present solution, the present solution is explained below by a specific embodiment in combination with the accompanying drawings.

A reinforcement type wire control actuator adopts a modular design, as shown in figures 1, 2, 3 and 4, comprises a brake disc 1, a left friction plate 2, a right friction plate 3, calipers 4, a cylinder body 5, an electromagnetic coil assembly 6, a magnetostrictive rod 7, an adjusting bolt 8, a wedge block 9, a piston 10 and a rubber ring 11; the electromagnetic coil assembly 6 and the magnetostrictive rod 7 form a magnetostrictive actuator;

the brake disc 1 is connected with an axle bolt, the left friction plate 2 and the right friction plate 3 are respectively arranged at the left side and the right side of the brake disc 1, and the left friction plate 2 and the right friction plate 3 are respectively arranged in an adaptive groove on the caliper 4 through back steel sheets on the left friction plate and the right friction plate for rotation limiting; the calipers 4 are fixedly arranged on a vehicle body; the cylinder body 5 is fixedly connected with the caliper 4; the piston 10 is sleeved in the cylinder body 5, the left end face of the piston 10 is in surface contact with the back steel sheet on the right friction plate 3, and the wedge face of the right end of the piston 10 is in surface contact with the wedge face of the wedge block 9; the rubber ring 11 is arranged in the annular notches of the piston 10 and the cylinder body 5 and is used for assisting the piston 10 to reset after braking is finished so as to ensure braking gaps among the left friction plate 2, the right friction plate 3 and the brake disc 1; the wedge 9 is fixedly connected with the magnetostrictive rod 7, and the wedge 9 is guided and limited through notches on the electromagnetic bracket 601 in the cylinder body 5 and the electromagnetic coil assembly 6; a return spring is also arranged on the wedge block 9 to prevent the wedge block 9 from being wedged;

the electromagnetic coil assembly 6 comprises an electromagnetic bracket 601 and an electromagnetic coil 602; the electromagnetic coil 602 is fixedly sleeved on the electromagnetic bracket 601; the electromagnetic bracket 601 is fixedly arranged on the cylinder body 5; the magnetostrictive rod 7 is sleeved in the electromagnetic support 601, one end of the magnetostrictive rod 7 is fixedly connected with the wedge 9, and the other end of the magnetostrictive rod 7 is in surface contact with the adjusting bolt 8; the adjusting bolt 8 is installed at the tail of the electromagnetic support 601, the position of the magnetostrictive rod 7 and the support of the magnetostrictive rod 7 are adjusted by rotating the adjusting bolt 8, the relative contact position of the wedge 9 and the piston 10 is adjusted by adjusting the position of the magnetostrictive rod 7, and then the position of the piston 10 is adjusted to compensate for the increase of the braking clearance of the left friction plate 2 and the right friction plate 3 caused by braking abrasion; the solenoid 602 is electrically connected to the vehicle controller.

When a vehicle brakes, a vehicle controller controls the current in the electromagnetic coil 602 to change the strength of a magnetic field, so as to control the extension length of the magnetostrictive rod 7, when the magnetostrictive rod 7 extends, the wedge 9 is pushed to move forwards, the wedge surface on the wedge 9 compresses and pushes the piston 10 to move, the piston 10 compresses the right friction plate 3, and a braking torque is generated under the combined action of the left friction plate 2 and the right friction plate 3; when braking is finished, the vehicle controller reduces the current in the electromagnetic coil 602 to zero, and all the parts are reset under the combined action of the reset spring on the wedge block 9 and the rubber ring 11.

Although preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and those skilled in the art can make many modifications without departing from the spirit and scope of the present invention as defined in the appended claims.