CN216734243U

CN216734243U - Electronic mechanical brake system and vehicle

Info

Publication number: CN216734243U
Application number: CN202123438718.3U
Authority: CN
Inventors: 任孝义; 高志峥; 于雷; 王发崇
Original assignee: Fawer Automotive Parts Co Ltd
Current assignee: Fawer Automotive Parts Co Ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-06-14
Anticipated expiration: 2031-12-31

Abstract

The utility model relates to the technical field of vehicle braking systems, in particular to an electromechanical braking system and a vehicle. The electronic mechanical brake system comprises an electronic control ECU (electronic control Unit), a power supply, a pedal and a brake actuating mechanism, wherein the electronic control ECU is respectively and electrically connected with the power supply, the pedal and the brake actuating mechanism, and can receive an electric signal sent by the pedal and control the brake actuating mechanism to start and stop; the brake actuating mechanism comprises a brake motor and a brake; the electronic mechanical brake system also comprises a retarder which is electrically connected with the Electronic Control Unit (ECU); the input shaft of the retarder is connected with a transmission shaft of the vehicle, and the transmission shaft is connected with the wheels. When a vehicle is braked, the retarder and the brake work cooperatively to realize the braking of the vehicle, so that the problems that the service life of a motor is influenced by insufficient braking force generated by the brake in an EMB system and high temperature generated by strong braking, electromagnetic heat fading, large vibration and the like are solved, and the system has strong braking force, good stability and high safety.

Description

Electronic mechanical brake system and vehicle

Technical Field

The utility model relates to the technical field of vehicle braking systems, in particular to an electromechanical braking system and a vehicle.

Background

The vehicle is an indispensable vehicle in people's daily life, has very high prevalence. In order to avoid obstacles around a vehicle, it is often necessary to reduce the moving speed of the vehicle or stop the movement of the vehicle using a braking device in driving the vehicle. Currently, there is a lot of research on vehicles that want to realize braking of the vehicle through an Electromechanical brake (EMB) system. In the prior art, an EMB system includes a motor for generating a braking force, and a mechanical transmission mechanism driven by the motor. When the vehicle brakes, the motor controller receives the command, and then the motor drives the mechanical transmission mechanism to push the brake pads to press the brake disc so as to generate braking force. The prior art has the following problems: the braking force generated by the motor is insufficient; high temperature generated during strong braking influences the service life of the motor; during emergency braking, the current of the motor is large, so that severe impact is caused on the power supply of a vehicle-mounted storage battery, and the power supply safety of the whole vehicle is directly influenced; electromagnetic heat fading, large vibration, and the like. It has therefore been difficult to achieve mass production in vehicles.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving the above-mentioned problems of the prior art, and an object of the present invention is to provide an electromechanical brake system having a strong braking force, good stability, and high safety.

Another object of the present invention is to provide a vehicle having a strong braking force, good braking stability and high safety.

In order to achieve the purpose, the utility model adopts the following technical scheme:

an electronic mechanical brake system comprises an Electronic Control Unit (ECU), a power supply, a pedal and a brake actuating mechanism, wherein the ECU is respectively and electrically connected with the power supply, the pedal and the brake actuating mechanism, and can receive an electric signal sent by the pedal and control the brake actuating mechanism to start and stop; the brake actuating mechanism comprises a brake motor and a brake; the electronic mechanical brake system also comprises a retarder which is electrically connected with the Electronic Control Unit (ECU); the input shaft of the retarder is connected with a transmission shaft of a vehicle, and the transmission shaft is connected with wheels; the retarder and the brake work cooperatively to realize the braking of the vehicle.

Further, the brake and the retarder are arranged in series.

Further, the electronic mechanical brake system further comprises a pressure sensor, and the brake is electrically connected with the electronic control ECU through the pressure sensor.

Further, the brake actuator and the retarder are provided at the wheel.

Furthermore, the number of the brake actuating mechanisms and the number of the retarders are multiple, and one brake actuating mechanism and one retarder are arranged at any wheel; the number of the pressure sensors is multiple, and the brakes are connected with the pressure sensors in a one-to-one correspondence mode.

Further, the electromechanical brake system further comprises a control unit, and the control unit is electrically connected with the electronic control ECU; the plurality of brake actuators are electrically connected with the control unit, wherein the plurality of brakes are electrically connected with the control unit through the pressure sensors connected with the brakes; the plurality of retarders is electrically connected with the control unit.

Furthermore, the electronic mechanical brake system further comprises a pedal force simulation mechanism and a pedal force sensor, and the pedal is connected to the electronic control ECU through the pedal force simulation mechanism and the pedal force sensor in sequence.

Further, the electromechanical braking system further comprises a pedal displacement sensor, and the pedal is connected to the electronic control ECU through the pedal displacement sensor.

Further, the pedal displacement sensor adopts an inductive angular displacement sensor.

A vehicle comprising an electromechanical braking system as described above.

The utility model has the beneficial effects that:

the utility model provides an electronic mechanical brake system and a vehicle, wherein the system comprises an electronic control ECU (electronic control Unit), a power supply, a pedal and a brake actuating mechanism, wherein the electronic control ECU is respectively and electrically connected with the power supply, the pedal and the brake actuating mechanism, and can receive an electric signal sent by the pedal and control the brake actuating mechanism to start and stop; the brake actuating mechanism comprises a brake motor and a brake; the electronic mechanical brake system also comprises a retarder which is electrically connected with the Electronic Control Unit (ECU); the input shaft of the retarder is connected with a transmission shaft of the vehicle, and the transmission shaft is connected with the wheels. Compare the mode that adopts braking actuating mechanism to brake the vehicle alone in the EMB system among the prior art, this embodiment electromechanical braking system when the vehicle braking, through retarber and stopper cooperation work, coordinate the braking that realizes the vehicle jointly, avoided the stopper to produce that the brake force is not enough, the high temperature that strong brake produced influences motor life, electromagnetism heat fading, vibration big scheduling problem for the brake force of system is strong, stability is good, the security is high.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic structural diagram of an electromechanical braking system according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a planetary gear type retarder provided by an embodiment of the utility model;

FIG. 3 is a schematic structural diagram of a vane retarder according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of the electromechanical braking system provided in the embodiment of the present invention when the number of the brake actuators and the retarders is multiple.

Icon:

1-an electronic control ECU; 2-a power supply; 3-a pedal; 4-a brake actuator; 41-braking the motor; 42-a brake; 5-a retarder; 51-an input shaft; 52-sun gear; 53-a planet wheel; 54-a ring gear; 55-a housing; 56-a rotor; 57-leaf blade; 6-a pressure sensor; 7-a wheel; 8-a control unit; 9-a pedal force simulation mechanism; 10-a pedal force sensor; 11-pedal displacement sensor.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

It should be noted that, in the description of the present invention, the terms "connected" and "mounted" should be understood broadly, for example, they may be fixed, detachable or integrated; can be directly connected or connected through an intermediate medium; either mechanically or electrically. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Referring to fig. 1, the present embodiment provides an electromechanical braking system, including an electronic control ECU1, a power supply 2, a pedal 3, and a brake actuator 4, where the electronic control ECU1 is electrically connected to the power supply 2, the pedal 3, and the brake actuator 4, respectively, and an electronic control ECU1 can receive an electrical signal sent by the pedal 3 and control the brake actuator 4 to start and stop; the brake actuator 4 comprises a brake motor 41 and a brake 42; the electromechanical braking system also comprises a retarder 5, and the retarder 5 is electrically connected with the electronic control ECU 1; the input shaft 51 of the retarder 5 is connected to the drive shaft of the vehicle, and the drive shaft is connected to the wheels 7. Compared with the mode that the EMB system in the prior art singly adopts the brake actuating mechanism to brake the vehicle, the electromechanical brake system described in this embodiment cooperates with the brake 42 through the retarder 5 to realize the braking of the vehicle. In this embodiment, the retarder 5 can bear 80% of braking force, so as to avoid the problems that the service life of the motor is affected by insufficient braking force generated by the braking motor 41 and high temperature generated by strong braking, the electromagnetic heat is degenerated, the vibration is large, and the like, so that the braking force of the system is strong, the stability is good, and the safety is high.

In this embodiment, the size of the action of the brake actuator 4 and the retarder 5 can be automatically and reasonably distributed according to actual conditions. Specifically, when emergency braking is performed, the retarder 5 and the brake 42 simultaneously act in a coordinated manner, so that the service brake is stopped according to the requirement of a driver, and the reliability of the system is improved; when the speed is reduced at ordinary times, on a downhill and the like, the retarder 5 can act alone because the required braking force is small. Therefore, the vehicle can be braked in a non-contact and non-abrasion mode under 80% of conditions, most of heat generated by braking is dissipated by the aluminum alloy heat dissipation shell of the retarder 5, and the problems that the service life of a brake motor is influenced by high temperature, backup braking force is not generated, the braking force is insufficient and the like in the prior art are solved. In addition, because the brake actuating mechanism 4 only acts during emergency braking and parking braking, the phenomenon of high temperature is greatly avoided, the vibration of the system is reduced, the braking smoothness is improved, the problems of electromagnetic heat fading and the like of the brake motor 41 are solved, the service life of the brake motor is prolonged, and the maintenance cost is reduced. Since the retarder 5 bears a part of the braking force, the size of the brake 42, the maximum braking force, and the motor power can be reduced, thereby reducing the cost.

Optionally, the electromechanical brake system further includes a pedal force simulation mechanism 9 and a pedal force sensor 10, and the pedal 3 is connected to the electronic control ECU1 through the pedal force simulation mechanism 9 and the pedal force sensor 10 in turn. The pedal force sensor 10 can acquire the stress condition of the pedal 3. When the vehicle brakes, a driver steps on the pedal 3, the pedal force sensor 10 can intuitively acquire the stress value of the pedal 3 through the pedal force simulation mechanism 9, convert the stress value into an electric signal and transmit the electric signal to the electronic control ECU1 in real time. Upon receiving the signal, the electronic control ECU1 distributes the braking force to the brake actuator 4 and the retarder 5 based on the signal, and sends a braking signal to control the brake actuator 4 and the retarder 5 to brake the vehicle.

Optionally, the electromechanical braking system further comprises a pedal displacement sensor 11, and the pedal 3 is connected to the electronic control ECU1 through the pedal displacement sensor 11. The pedal displacement sensor 11 further ensures the reliability of the system. Alternatively, the pedal displacement sensor 11 employs an inductive angular displacement sensor. The pedal displacement sensor 11 is arranged at the switching position of the pedal 3, when a person steps on the pedal 3, the pedal displacement sensor 11 can capture the displacement of the electronic brake pedal stepped by the driver, convert the displacement into a displacement signal and transmit the displacement signal to the electronic control ECU1 in real time. The electronic control ECU1 receives the signal, distributes the braking force to the brake actuator 4 and the retarder 5 based on the signal, and sends out a braking signal to control the brake actuator 4 and the retarder 5 to brake the vehicle. In the braking process of the vehicle, when a driver needs to increase the braking force, namely needs to output larger braking force, the pedal 3 can generate larger displacement only by increasing the force for treading the pedal 3, and the braking signal output by the system is correspondingly increased.

Further, the brake 42 and the damper 5 may be arranged in parallel or in series. Preferably, the brake 42 and the retarder 5 are arranged in series, which makes the system compact, small and convenient.

Further, the electromechanical brake system further includes a pressure sensor 6, and the brake 42 is electrically connected to the electronic control ECU1 through the pressure sensor 6. The pressure sensor 6 can sense the pressure signal of the brake 42 and convert the pressure signal into a usable output electric signal to be transmitted to the electronic control ECU1, so that the electronic control ECU1 can coordinate the braking force generated by the brake actuator 4 and the retarder 5 in real time.

Further, a brake actuator 4 and a retarder 5 are provided at a wheel 7 of the vehicle. When the vehicle brakes, the braking force generated by the brake actuating mechanism 4 and the retarder 5 directly acts on the wheels 7, so that the braking effect is better.

Alternatively, the retarder 5 may be constructed in a planetary gear type or a vane type.

Referring to fig. 2, fig. 2 is a schematic structural diagram of the planetary wheel type retarder provided by the utility model. Specifically, the retarder 5 includes an input shaft 51, a sun gear 52, a plurality of planet gears 53, a ring gear 54, and a housing 55. In this embodiment, the number of the planetary gears 53 is specifically 3. An input shaft 51, a sun gear 52, a plurality of planet gears 53 and a ring gear 54 are arranged in a housing 55, and the sun gear 52 is connected with the input shaft 51; a plurality of planetary gears 53 are meshed with the sun gear 52 and the ring gear 54, respectively. The input shaft 51 is connected to the vehicle's drive shaft and the mechanical structure produces a gyrating motion within the housing 55 under the influence of the torque of the drive shaft. Because the retarder with the planetary wheel type structure adopts the gear engagement mode for transmission, the retarder has the advantages of high precision, high efficiency, low noise, high reliability and the like.

When the vehicle brakes, the electronic control ECU1 sends an electric signal to control the retarder 5 to start braking; at this time, the fluid medium fills the housing 55, the sun gear 52 and the plurality of planet gears 53 start to engage and rotate in the fluid medium, and along with the engagement motion among the gears, the pressure change in the housing 55 enables the fluid medium to flow in a loop and generate large resistance, so that the braking torque is generated; this braking torque is transmitted to the propeller shaft of the vehicle through the input shaft 51, thereby braking the vehicle. The electronic control ECU1 can control the flow rate of the fluid medium entering the housing 55 according to actual requirements, and further control the magnitude of the braking torque generated by the retarder 5. When no load is carried out, unloading is carried out on the system, and the fluid medium is extracted from the shell 55; at this moment, the retarder 5 idles together with the vehicle transmission shaft, and the resistance loss is small and can be ignored.

Referring to fig. 3, fig. 3 is a schematic structural diagram of the vane retarder provided in the present invention. Specifically, the retarder 5 includes an input shaft 51, a rotor 56, a plurality of blades 57, and a housing 55. An input shaft 51, a rotor 56, and a plurality of blades 57 are disposed in the housing 55, the rotor 56 being connected to the input shaft 51; a plurality of blades 57 are coupled to the rotor 56, and the plurality of blades 57 are arranged in a circular array. The input shaft 51 is connected to the vehicle's drive shaft and the mechanical structure produces a gyrating motion within the housing 55 under the influence of the torque of the drive shaft.

When the vehicle is braked, the fluid medium fills the housing 55, and the plurality of vanes 57 starts a gyrating motion in the fluid medium; the pressure change in the housing 55 causes the fluid medium to flow in the circuit and create a greater resistance, thereby generating a braking torque. The vane type retarder and the planetary gear type retarder are in the same state when in no-load, and the details are not repeated. The retarder with the double-acting vane type structure has the advantages of stable operation, good flow uniformity, compact structure and the like.

Referring to fig. 4, in the present embodiment, the number of the brake actuators 4 and the retarders 5 is plural, and one brake actuator 4 and one retarder 5 are disposed at any one wheel 7; the number of the pressure sensors 6 is plural, and the plurality of actuators 42 and the plurality of pressure sensors 6 are connected in one-to-one correspondence. When the vehicle is braked, providing a plurality of brake actuators 4 and a plurality of retarders 5 enables a braking force to be generated at each wheel 7.

On the basis of the structure, the electromechanical brake system further comprises a control unit 8, and the control unit 8 is electrically connected with the electronic control ECU 1; the plurality of brake actuators 4 are electrically connected to the control unit 8, wherein the plurality of brakes 42 are electrically connected to the control unit 8 via the pressure sensors 6 connected thereto; the plurality of retarders 5 and the control unit 8 are electrically connected. Because each brake 42 is connected with one pressure sensor 6, the pressure change of each brake 42 can be transmitted to the control unit 8 in real time, the braking force output by each brake 42 can be accurately and real-timely adjusted through the electronic control ECU1 and the control unit 8, and the system can control and coordinate the magnitude of the braking force generated by each brake actuator 4 and the retarder 5 according to actual conditions. In the above arrangement, a plurality of brake actuators 4 and retarder 5 jointly use a control unit 8 and an electronic control ECU1, and form a control logic integrating a pressure signal, a wheel rotation speed signal, a vehicle speed signal, a retarder temperature signal, a retarder working chamber pressure signal and a brake pedal signal of a structure to be braked, so that when braking is performed, a vehicle can be decelerated, braked and parked according to the intention of a driver, and even adapted to automatic driving to perform automatic deceleration braking.

The embodiment also provides a vehicle comprising the electromechanical brake system. The types of vehicles include trucks, buses, cars, etc., without limitation.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electronic mechanical brake system comprises an electronic control ECU (1), a power supply (2), a pedal (3) and a brake executing mechanism (4), wherein the electronic control ECU (1) is respectively electrically connected with the power supply (2), the pedal (3) and the brake executing mechanism (4), and the electronic control ECU (1) can receive an electric signal sent by the pedal (3) and control the brake executing mechanism (4) to start and stop; the brake actuating mechanism (4) comprises a brake motor (41) and a brake (42); the electronic mechanical brake system is characterized by further comprising a retarder (5), wherein the retarder (5) is electrically connected with the electronic control ECU (1); an input shaft (51) of the retarder (5) is connected with a transmission shaft of a vehicle, and the transmission shaft is connected with wheels (7); the retarder (5) and the brake (42) work in a matched mode to achieve braking of the vehicle.

2. Electromechanical braking system according to claim 1, characterized in that the brake (42) and the retarder (5) are arranged in series.

3. Electromechanical braking system according to claim 1, characterized in that it further comprises a pressure sensor (6), said brake (42) being electrically connected to said electronic control ECU (1) through said pressure sensor (6).

4. Electromechanical brake system according to claim 3, characterised in that the brake actuator (4) and the retarder (5) are provided at the wheel (7).

5. Electromechanical brake system according to claim 4, characterized in that said brake actuators (4) and said retarders (5) are plural in number, one brake actuator (4) and one retarder (5) being provided at any one of said wheels (7); the number of the pressure sensors (6) is multiple, and the plurality of brakes (42) and the plurality of pressure sensors (6) are connected in a one-to-one correspondence manner.

6. Electromechanical braking system according to claim 5, characterized in that it further comprises a control unit (8), said control unit (8) being electrically connected to said electronic control ECU (1); the plurality of brake actuators (4) are electrically connected to the control unit (8), wherein the plurality of brakes (42) are electrically connected to the control unit (8) via the pressure sensor (6) connected thereto; the plurality of retarders (5) are electrically connected with the control unit (8).

7. Electromechanical brake system according to claim 1, characterized in that it further comprises a pedal force simulation mechanism (9) and a pedal force sensor (10), said pedal (3) being connected to said electronic control ECU (1) in turn via said pedal force simulation mechanism (9) and said pedal force sensor (10).

8. Electromechanical braking system according to claim 1, characterized in that it further comprises a pedal displacement sensor (11), said pedal (3) being connected to said electronic control ECU (1) through said pedal displacement sensor (11).

9. Electromechanical braking system according to claim 8, characterized in that said pedal displacement sensor (11) is an inductive angular displacement sensor.

10. A vehicle characterized by comprising an electromechanical braking system according to any one of claims 1 to 9.