CN116394902B - Electromechanical braking device, braking method and vehicle - Google Patents
Electromechanical braking device, braking method and vehicle Download PDFInfo
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- CN116394902B CN116394902B CN202310468716.3A CN202310468716A CN116394902B CN 116394902 B CN116394902 B CN 116394902B CN 202310468716 A CN202310468716 A CN 202310468716A CN 116394902 B CN116394902 B CN 116394902B
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- brake
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- 238000000034 method Methods 0.000 title abstract description 39
- 230000005540 biological transmission Effects 0.000 claims abstract description 112
- 238000009434 installation Methods 0.000 claims description 25
- 244000309464 bull Species 0.000 abstract description 5
- 230000008569 process Effects 0.000 description 14
- 238000007789 sealing Methods 0.000 description 8
- 238000004590 computer program Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000006870 function Effects 0.000 description 4
- 230000009977 dual effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000005381 potential energy Methods 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
- B60T13/746—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive and mechanical transmission of the braking action
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/18—Safety devices; Monitoring
- B60T17/22—Devices for monitoring or checking brake systems; Signal devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T2270/00—Further aspects of brake control systems not otherwise provided for
- B60T2270/40—Failsafe aspects of brake control systems
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
The application relates to the technical field of automobile braking, and particularly discloses an electromechanical braking device, a braking method and a vehicle; the device comprises a shell, wherein a first cavity and a second cavity are arranged in the shell, a first motor, a first pinion, a first bull gear and a first ball screw shaft are arranged in the first cavity, and the first ball screw shaft is sequentially connected with a first ball screw nut and a transmission push rod; the second chamber is provided with a second motor and a second pinion, and the second pinion is sequentially connected with a second ball screw nut and a second ball screw shaft; the second ball screw shaft is connected with the transmission sleeve; the transmission sleeve is connected with the transmission push rod; a transmission piston is arranged in the first brake inlay, the transmission piston is connected with the transmission sleeve, and the transmission piston is connected with the first friction plate; the second brake inlay is connected with a lever, the middle part of the lever is connected with the shell, one end of the lever is connected with the first brake inlay, the braking torque of the device is large, the braking performance is more stable, the fault-tolerant capability of the braking device is higher, and the safety performance is better.
Description
Technical Field
The application relates to the technical field of automobile braking, in particular to an electromechanical braking device, a braking method and a vehicle.
Background
The development of the electric and intelligent of the automobile promotes the development of the brake system towards the brake-by-wire direction, which is consistent with the trend of the modern automobile towards modularization, integration and electromechanical integration, and meets the new requirement of the automobile on the brake system. Brake-by-wire is a necessary development because of the nature of motor braking and the need for maximum recovered energy, which requires that the braking force of the braking system must be adjustable in real time. Brake-by-wire systems can be divided into two categories, electro-hydraulic brake systems and electro-mechanical brake systems.
Compared with an electronic hydraulic braking system, the electronic mechanical braking system in the prior art avoids the influence of the pressure volume characteristic of hydraulic pressure on the response speed, shortens the mechanical transmission process, improves the transmission efficiency and improves the response speed. However, the electromechanical braking system in the prior art has some defects that the electromechanical braking system has no other backup braking system and is influenced by the size of a motor and an energy system, the braking moment of the electromechanical braking system in the prior art is not large enough, the braking performance is unstable, and the fault tolerance of the braking system is low, so that the safety performance of the electromechanical braking in the prior art needs to be improved.
Disclosure of Invention
The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the application provides an electromechanical braking device, a braking method and a vehicle.
An electromechanical brake apparatus according to an embodiment of a first aspect of the present application includes:
the device comprises a shell, wherein a fixed cavity wall is arranged in the shell, a first cavity and a second cavity are respectively arranged at two sides of the fixed cavity wall, a first motor is arranged in the first cavity, a first pinion is arranged on an output shaft of the first motor, the first pinion is in meshed connection with a first large gear, the first large gear is fixedly connected with a first ball screw shaft, the first ball screw shaft is rotationally connected with a first ball screw nut, and one end face of the first ball screw nut is fixedly connected with a transmission push rod;
the second chamber is fixedly provided with a second motor, an output shaft of the second motor is provided with a second pinion, the second pinion is rotationally connected with a second ball screw nut, and the second ball screw nut is rotationally connected with a second ball screw shaft; the second ball screw shaft is connected with the transmission sleeve in a sliding manner; the transmission sleeve is connected with the transmission push rod in a sliding manner;
a first brake inlay; a transmission piston is arranged in the first brake inlay, a reset spring is coaxially sleeved on the surface of the transmission piston, one end of the transmission piston is fixedly connected with the transmission sleeve, and the other end of the transmission piston is movably connected with a first friction plate;
a second brake inlay; the second brake inlay rotates to be connected with the lever, the lever middle part is rotated through the axis of rotation and is connected the casing, the lever other end rotates to be connected first brake inlay, keep away from the lever the second brake inlay surface is provided with the second friction disc, the second friction disc with first friction disc coaxial line sets up.
According to the electromechanical braking device provided by the embodiment of the application, through the arrangement of the double motors, the first motor drives the first ball screw shaft through the gear, the first ball screw nut is sleeved on the surface of the first ball screw shaft, one end of the first ball screw nut is fixedly connected with the driving push rod, the second motor drives the second ball screw nut through the gear, the second ball screw nut is rotationally connected with the second ball screw shaft, the second ball screw shaft and one end of the second ball screw nut are sequentially connected with the driving sleeve, the driving piston and the friction plate.
According to some embodiments of the application, the second ball screw nut is provided with a screw shaft matching hole, the second ball screw shaft passes through the screw shaft matching hole and is coaxially arranged with the second ball screw nut, a second large gear is fixedly arranged on the surface of the second ball screw nut and is meshed with the second small gear, the second large gear is coaxially arranged with the second ball screw nut through the second ball screw shaft, a ball is arranged between the second ball screw shaft and the second ball screw nut, and when braking is needed, the motor drives the second ball screw nut to rotate, and the second ball screw shaft transversely reciprocates through the ball.
According to some embodiments of the present application, the second ball screw shaft is sequentially provided with a first installation through hole and a second installation through hole along the axis, the aperture of the second installation through hole is larger than that of the first installation through hole, one end of the transmission sleeve is abutted to the bottom surface of the second installation through hole, and the outer wall of the transmission sleeve is in clearance fit with the inner wall of the second installation through hole; through first installation through-hole and second installation through-hole setting, transmission sleeve one end is contradicted to second installation through-hole bottom surface, and when second ball axle lateral shifting to drive transmission sleeve lateral shifting, realize transmission sleeve and second ball axle lateral shifting synchronization.
According to some embodiments of the application, the transmission sleeve is provided with a transmission groove along the axial direction, one end of the transmission push rod passes through the first installation through hole to be abutted to the bottom of the transmission groove, and the outer wall of the transmission push rod is in clearance fit with the inner wall of the transmission groove. The transmission groove is formed in the transmission sleeve, one end of the transmission push rod penetrates through the first installation through hole to be abutted against the bottom of the transmission groove, when the first ball screw nut transversely moves, the transmission is carried out to the transmission sleeve, meanwhile, the transmission sleeve, the transmission push rod and the second ball screw shaft can mutually slide, when the double motors are braked, the running conditions of the motors cannot mutually interfere, and the moment for braking the double motors is integrated.
According to some embodiments of the application, the first brake inlay is provided with a limit mounting cavity, the inner wall of the limit mounting cavity is provided with a stepped groove, the limit mounting cavity is internally provided with the transmission piston, the outer surface of the transmission piston is fixedly provided with a sealing baffle ring, the sealing baffle ring is arranged in the stepped groove, one end of the return spring is abutted to the surface of the sealing baffle ring, the other end of the return spring is abutted to the side wall of the stepped groove, the sealing baffle ring and the return spring are arranged, and after the motor drives the transmission screw to brake, the elastic potential energy after the return spring is compressed is released, so that the transmission piston, the transmission sleeve, the transmission push rod and other parts coaxially arranged with the transmission push rod are reset.
According to some embodiments of the application, a guide bolt is slidingly connected to the bottom of the first brake inlay far away from the limit mounting cavity, one end of the guide bolt is fixedly connected with a brake caliper bracket, and a guide limit block is fixedly arranged on the top of the first brake inlay far away from the limit mounting cavity; the inner wall surface of the second brake inlay is provided with a guide limit groove body which is in sliding connection with the guide limit block; through the arrangement of the guide bolt and the guide limiting block, the first brake inlay is prevented from shifting during braking, and the stability of the device in the braking process is ensured.
According to a second aspect of the present application, there is provided a braking method applied to the electromechanical braking device according to the first aspect, the braking method including:
acquiring working conditions of a first sub-brake device and a second sub-brake device in the brake device, and judging a braking working condition requested by the vehicle if the sub-brake devices are in a normal working state;
according to the braking working condition, if the braking working condition is a conventional braking working condition, the braking device starts a single braking working mode;
according to the braking working condition, if the braking working condition is an emergency braking working condition, the braking device starts a double-braking working mode;
if the sub-braking device has a fault, responding to a fault braking strategy;
according to the fault braking strategy, if a single sub-braking device has faults, starting the sub-braking device in a normal working state to brake when the vehicle requests braking, and carrying out information prompt through the vehicle information entertainment system, and if the double sub-braking devices have faults, responding to the alarm information prompt through the vehicle information entertainment system;
further, the single brake operation mode includes: the braking device only starts the first sub-braking device or the second sub-braking device to brake so as to meet the braking force requirement of the vehicle under the conventional braking working condition; the dual brake operation mode includes: the braking device simultaneously starts the first sub-braking device and the second sub-braking device to brake so as to meet the braking force requirement of the vehicle under the emergency braking working condition.
According to the braking method, the braking method is applied to the electromechanical braking device of the first embodiment, different braking requests of a vehicle are met, particularly when the vehicle requests emergency braking, the first sub braking device or the second sub braking device is started at the same time, high-moment braking is achieved, when the vehicle requests conventional braking, braking is achieved through controlling one of the sub braking devices, the braking method is applied to the electromechanical braking device of the first embodiment, braking performance stability is achieved under different braking working conditions, meanwhile under special conditions, if one of the sub braking devices fails, the other sub braking device serves as a standby braking system to brake, and the vehicle information entertainment system responds to an alarm information prompt to inform a driver of the running condition of the electromechanical braking device, so that the braking safety performance of the vehicle is further guaranteed, and the safety of the driver is protected.
According to an embodiment of the third aspect of the present application, a vehicle includes:
an electromechanical brake apparatus of an embodiment of the first aspect of the present application;
a processor configured to implement the steps of the braking method of the embodiment of the first aspect of the application.
Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a transverse cross-sectional view of an electromechanical brake apparatus according to an embodiment of the present application;
FIG. 2 is a schematic view of a part of an electromechanical brake apparatus according to an embodiment of the present application;
FIG. 3 is a schematic view of a second ball screw nut according to an embodiment of the application;
FIG. 4 is a schematic structural view of a second ball screw shaft according to an embodiment of the present application;
FIG. 5 is a schematic structural view of a transmission sleeve according to an embodiment of the present application;
FIG. 6 is a flow chart of a braking method according to an embodiment of the application;
fig. 7 is a flow chart of a braking method according to an embodiment of the present application.
Reference numerals:
100. a housing; 110. fixing the cavity wall; 111. a limit groove; 112. limiting through holes; 113. a rotating shaft; 120. a first chamber; 130. a second chamber;
210. a first motor; 220. a first pinion gear; 230. a first gearwheel; 240. a first ball screw shaft; 250. a first ball screw nut; 251. a first mounting plate; 260. a transmission push rod; 261. second mounting plate
310. A second motor; 320. a second pinion gear; 330. a second ball screw nut; 331. a screw shaft mating hole; 332. a first ball screw groove; 333. a second gearwheel; 340. a second ball screw shaft; 341. a first mounting through hole; 342. a second mounting through hole; 343. a second ball screw groove; 350. a transmission sleeve; 351. a transmission groove; 360. a transmission piston; 370. a return spring; 380. a sealing baffle ring; 390. a first friction plate;
400. a first brake inlay; 410. a limit mounting cavity; 411. a stepped groove; 420. a guide bolt; 430. a guide limiting block; 440. a first lever mounting portion;
500. a second brake inlay; 510. a second friction plate; 520. a lever; 530. a guiding limit groove body;
600. a brake caliper bracket;
700. a brake disc.
Detailed Description
The following detailed description of embodiments of the application, with reference to the accompanying drawings, is illustrative of the embodiments described herein, and it is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Example 1
Referring to fig. 1, the present embodiment provides an electromechanical brake apparatus, including:
the device comprises a shell 100, wherein a fixed cavity wall 110 is arranged in the shell 100, a first cavity 120 and a second cavity 130 are respectively arranged at two sides of the fixed cavity wall 110, a limit groove 111 is formed in the surface of the fixed cavity wall 110, the limit groove 111 is a cylindrical groove body, the inner diameter of the limit groove 111 is slightly larger than the outer diameter of a first ball screw nut 250, a limit through hole 112 is formed in the bottom of the limit groove 111, the limit through hole 112 and the limit groove 111 are coaxial, and the limit groove 111 and the limit through hole 112 are communicated with the first cavity 120 and the second cavity 130; the first chamber 120 and the second chamber 130 are provided to make the brake device more compact.
In some embodiments, the first motor 210 is fixedly installed in the first chamber 120, the output shaft of the first motor 210 is provided with a first pinion 220, the first pinion 220 is in meshed connection with a first bull gear 230, the first bull gear 230 is fixedly connected with a first ball screw shaft 240, and it should be noted that the first ball screw shaft 240 passes through a central hole of the first bull gear 230 and is fixedly connected, but in this embodiment, the first bull gear 230 and the first ball screw shaft 240 may also be manufactured by integral processing;
the first ball screw shaft 240 is rotatably connected with the first ball screw nut 250, specifically, the first ball screw nut 250 is mounted in the limit groove 111, the first ball screw nut 250 is in clearance fit with the limit groove 111, the first ball screw nut 250 can slide transversely along the limit groove 111, the first ball screw shaft 240 passes through a through hole formed in the first ball screw nut 250 along a central axis, the first ball screw shaft 240 is in clearance fit with the through hole, balls are arranged between contact surfaces of the first ball screw shaft 240 and the first ball screw nut 250, through ball arrangement, when the first ball screw shaft 240 rotates along an axis, the first ball screw nut 250 moves transversely along the direction of the center axis, and one end surface of the first ball screw nut 250 is fixedly connected with the transmission push rod 260 through a bolt;
in some embodiments, a second motor 310 is fixedly installed in the second chamber 130 near the side of the fixed chamber wall 110, a second pinion 320 is installed on an output shaft of the second motor 310, the second pinion 320 is rotationally connected with a second ball screw nut 330, and the second ball screw nut 330 is rotationally connected with a second ball screw shaft 340; it should be noted that, the second ball screw nut 330 is provided with a through hole along the axial direction, the second ball screw shaft 340 passes through the through hole to realize coaxial rotation connection with the second ball screw nut 330, a ball is disposed between the contact surfaces of the second ball screw shaft 340 and the second ball screw nut 330, when the second motor 310 drives the second ball screw nut 330 to rotate along the central axis, the second ball screw nut 330 drives the second ball screw shaft 340 to realize transverse movement through the arrangement of the ball;
the second ball screw shaft 340 is slidably connected with a transmission sleeve 350; the transmission sleeve 350 is slidably connected to the transmission push rod 260, wherein one end of the transmission push rod 260 passes through the second ball screw shaft 340 and abuts against a preset limit groove of the transmission sleeve 350, and the transmission sleeve 350, the transmission push rod 260 and the second ball screw shaft 340 are coaxially disposed.
A first brake inlay 400; the first brake inlay 400 is provided with a limit mounting cavity 410, the inner wall of the limit mounting cavity 410 is provided with a stepped slot 411 in a surrounding manner, the limit mounting cavity 410 is internally provided with a transmission piston 360, one end face of the transmission piston 360 is fixedly provided with a first friction plate 390, the outer surface of the transmission piston 360 is fixedly provided with a sealing baffle ring 380, the sealing baffle ring 380 is arranged in the stepped slot 411, one end of a return spring 370 is abutted to the side surface of the sealing baffle ring 380, the other end of the return spring 370 is abutted to the side wall of the stepped slot 411, the width of the deep slot part of the stepped slot 411 is larger than the stroke of the first friction plate 390 to complete the braking process, and meanwhile, further explanation is needed that the return spring 370 is compressed in the braking process, and the compression converted elasticity and the elasticity of the return spring 370 are satisfied, so that the return of parts of the transmission piston 360, the transmission sleeve 350, the transmission push rod 260, the second ball screw shaft 340 and the like after the braking process are involved in the braking process are reset.
In some embodiments, in order to ensure that the first brake inlay 400 can only move along the central axis direction of the parts such as the transmission piston 360, the transmission sleeve 350, the transmission push rod 260, etc., a guide bolt 420 is slidably connected to the bottom of the first brake inlay 400 far away from the limit mounting cavity 410, one end of the guide bolt 420 is fixedly connected to the brake caliper bracket 600, and the arrangement of the guide bolt 420 is used for limiting and moving the first brake inlay 400, so that the arrangement also ensures the stability of the first brake inlay 400 in the braking process, prevents the first brake inlay 400 from moving in a dislocation manner in the braking process, and provides the safety performance of device braking.
Since the movement range of the first brake inlay 400 is large during the braking process of the brake disc 700, in order to further ensure the stability of the first brake inlay 400 during the braking process, a guide limit block 430 is fixedly arranged at the top of the first brake inlay 400, the guide limit block 430 is slidingly connected with a guide limit groove 530, and a first lever installation part 440 is arranged on the surface of the first brake inlay 400 close to the guide limit block 430;
in some embodiments, the second brake inlay 500; the second brake inlay 500 is rotatably connected with a lever 520, the middle part of the lever 520 is rotatably connected with the housing 100 through a rotating shaft 113, the other end of the lever 520 is rotatably connected with a first lever mounting part 440 of the first brake inlay 400, a second friction plate 510 is arranged on the inner side surface of the second brake inlay far away from the lever 520, the second friction plate 510 and the first friction plate 390 are coaxially arranged, and it is noted that a brake disc 700 is arranged between the first friction plate 390 and the second friction plate 510, and when the first brake inlay 400 moves leftwards to brake the brake disc 700, the first brake inlay 400 drives the second brake inlay 500 to move rightwards to brake the brake disc 700 through the lever 520 lever principle because the housing 100 is fixed;
the guiding and limiting groove 530 is further provided on the inner surface of the second brake inlay 500 near the second friction plate 510, and the guiding and limiting groove 530 cooperates with the guiding and limiting groove 430, but it should be noted that when the lever 520 drives the second brake inlay 500 to move laterally, the lever 520 and the connecting end of the second brake inlay 500 actually move in an arc, so that the second brake inlay 500 moves slightly upward when moving laterally, in this embodiment, the guiding and limiting groove 530 is provided with a width that satisfies that the guiding and limiting groove 430 does not squeeze with the guiding and limiting groove 530 when the guiding and limiting groove 530 moves in the guiding and limiting groove 530.
In some embodiments, the power of the first motor 210 and the second motor 310 may be selected according to the actual requirement, the first motor 210 and the second motor 310 may be selected from the same power motor, different power motors may be selected, and the first motor 210 and the second motor 310 may be selected from variable power motors.
Through the arrangement of the first motor 210 and the second motor 310, the first motor 210 can drive the first ball screw shaft 240 through gears, the first ball screw nut 250 is sleeved on the surface of the first ball screw shaft 240, one end of the first ball screw nut 250 is fixedly connected with the drive push rod 260, the second motor 310 can drive the second ball screw nut 330 through gears, the second ball screw nut 330 is rotationally connected with the second ball screw shaft 340, the second ball screw shaft 340 and one end are sequentially connected with the drive sleeve 350, the drive piston 360 and the friction plate, when a vehicle brake disc is required to be braked, a single motor or double motors can be selectively started to brake according to the braking condition of the vehicle, the first motor 210 and the second motor 310 output torque, and the pressure of the friction plate can be converted and overlapped simultaneously, so that the electromechanical braking device of the embodiment is provided with large braking torque, the emergency braking device can meet the braking force requirement of the vehicle, meanwhile, the braking performance is more stable when one sub-braking device breaks down, the sub-braking device refers to the fact that the related elements corresponding to different motors are braked, the other sub-braking device can be started immediately to brake, the fault-tolerant braking device is better in braking performance, and the braking system is better in braking performance.
Example 2
Referring to fig. 2 to 5, the present embodiment further describes a brake component of an electromechanical brake apparatus based on embodiment 1, including:
as shown in fig. 1, the first ball screw shaft 240 passes through the center of the first gearwheel 230 and is fixedly connected, a ball thread groove is formed on the surface of the first ball screw shaft 240, a mounting through hole is formed on the first ball screw nut 250 along the axial direction, a ball thread groove is formed on the inner surface of the mounting through hole, when the first ball screw shaft 240 and the first ball screw nut 250 are mounted, a thread channel is formed on the ball thread groove formed on the two contact surfaces, a plurality of balls are arranged in the thread channel, and when the first ball screw shaft 240 is converted into the first ball screw nut 250 to move along the axial direction of the first ball screw shaft 240 through the movement of the balls in the thread channel;
the first ball screw nut 250 is fixedly provided with a first mounting plate 251 at one end, the transmission push rod 260 is fixedly provided with a second mounting plate 261 at one end, the first mounting plate 251 is fixedly connected with the second mounting plate 261 through bolts, it is to be noted that in the actual production process, the first ball screw shaft 240 and the first ball screw nut 250 are produced together, the transmission push rod 260 is fixedly connected at one end of the first ball screw nut 250 through bolts, the replacement and the installation of the transmission push rod 260 are facilitated, one end of the first ball screw shaft 240 is abutted to a transmission groove fixedly arranged on the surface of the second mounting plate 261, the second ball screw shaft 340 is coaxially sleeved on the surface of the transmission push rod 260, and the second ball screw nut 330 is sleeved on the surface of the second ball screw shaft 340;
in some embodiments, as shown in fig. 3, the second ball screw nut 330 is provided with a screw shaft matching hole 331, a first ball screw groove 332 is provided on the inner surface of the screw shaft matching hole 331, a second large gear 333 is fixedly provided on the surface of the second ball screw nut 330, and the second large gear 333 is meshed with the second small gear 320.
As shown in fig. 4, a first installation through hole 341 and a second installation through hole 342 are sequentially formed in the second ball screw shaft 340 along the axis, the aperture of the second installation through hole 342 is larger than that of the first installation through hole 341, the aperture of the first installation through hole 341 is slightly larger than that of the transmission push rod 260, one end of the transmission push rod 260 passes through the first installation through hole 341, a second ball screw groove 343 is formed in the surface of the second ball screw shaft 340, the second ball screw groove 343 has the same shape as the first ball screw groove 332, it is to be noted that after the second ball screw shaft 340 is installed with the second ball screw nut 330, the second ball screw groove 343 and the first ball screw groove 332 form a screw channel, a plurality of balls are arranged in the screw channel, and when the second ball screw nut 330 is converted into the second ball screw shaft 340 to move along the axis direction thereof through the movement of the balls in the screw channel;
as shown in fig. 5, a transmission groove 351 is formed in an end face of the transmission sleeve 350 along an axial direction, the depth of the transmission groove 351 is smaller than the length of the transmission push rod 260, when the transmission sleeve 350 is mounted, one end of the transmission sleeve 350 is abutted against the bottom surface of the second mounting through hole 342, the outer wall of the transmission sleeve 350 is in clearance fit with the inner wall of the second mounting through hole 342, one end of the transmission push rod 260 passes through the first mounting through hole 341 and is abutted against the bottom of the transmission groove 351, and the outer wall of the transmission push rod 260 is in clearance fit with the inner wall of the transmission groove 351.
The transmission sleeve 350 is used for forming a transmission groove, one end of the transmission push rod 260 passes through the first mounting through hole 341 and abuts against the bottom of the transmission groove 351, so that when the second ball screw nut 330 transversely moves, the transmission is transmitted to the transmission sleeve 350, and meanwhile, the transmission sleeve 350, the transmission push rod 260 and the second ball screw shaft 340 can mutually slide, so that when the double motors are braked, the running conditions of the motors cannot mutually interfere, and the moment for braking the double motors is integrated.
Example 3
As shown in fig. 6 and 7, the present embodiment provides a braking method applied to the electromechanical braking device described in embodiment 1 or embodiment 2, the braking method including:
step S100: acquiring working conditions of a first sub-brake device and a second sub-brake device in the brake device, and judging a braking working condition requested by the vehicle if the sub-brake devices are in a normal working state;
step S200: according to the braking working condition, if the braking working condition is a conventional braking working condition, the braking device starts a single braking working mode;
step S300: according to the braking working condition, if the braking working condition is an emergency braking working condition, the braking device starts a double-braking working mode;
step S400: if the sub-braking device has a fault, responding to a fault braking strategy;
step S500: according to the fault braking strategy, if a single sub-braking device has faults, starting the sub-braking device in a normal working state to brake when the vehicle requests braking, and carrying out information prompt through the vehicle information entertainment system, and if the double sub-braking devices have faults, responding to the alarm information prompt through the vehicle information entertainment system;
in some embodiments, the single brake operation mode in step S200 specifically includes: the braking device only starts the first sub-braking device or the second sub-braking device to brake so as to meet the braking force requirement of the vehicle under the conventional braking working condition;
the dual brake operation mode in step S300 specifically includes: the braking device simultaneously starts the first sub-braking device and the second sub-braking device to brake so as to meet the braking force requirement of the vehicle under the emergency braking working condition.
It should be noted that the first sub-brake device may be a brake subsystem formed by one motor and a corresponding brake component in the electromechanical brake device, and the second sub-brake device may be a brake subsystem formed by the other motor and a corresponding brake component in the electromechanical brake device.
In some embodiments, by applying the braking method to the electromechanical braking device of embodiment 1 or embodiment 2, different braking requests of the vehicle are satisfied, particularly when an emergency braking is requested for the vehicle, the first sub-braking device or the second sub-braking device is started at the same time, so as to realize high-torque braking, and when a conventional braking is requested for the vehicle, one of the sub-braking devices is controlled to brake, the braking method is applied to the electromechanical braking device of the first embodiment, and in the face of different braking working conditions, stable braking performance is realized, and meanwhile, in some special cases, if one of the sub-braking devices fails, the other sub-braking device is used as a standby braking system to brake, and the vehicle information entertainment system responds to an alarm information prompt to inform the driver of the running condition of the electromechanical braking device, so that the braking safety performance of the vehicle is further ensured, and the safety of the driver is protected.
Example 4
The present embodiment provides a vehicle including:
the electromechanical brake apparatus of embodiment 1 or embodiment 2;
a processor configured to implement the steps of the braking method of embodiment 3.
Accordingly, the present embodiment also provides a storage medium having stored therein instructions that, when executed on a computer, cause the computer to perform the steps of the braking method described in the above embodiments.
It will be appreciated by those skilled in the art that the present embodiments may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In one typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include volatile memory in a computer-readable medium, random Access Memory (RAM) and/or nonvolatile memory, etc., such as Read Only Memory (ROM) or flash RAM. Memory is an example of a computer-readable medium.
Computer readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of storage media for a computer include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by a computing device. Computer-readable media, as defined herein, does not include transitory computer-readable media (transshipment) such as modulated data signals and carrier waves. It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises an element.
In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the application.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.
It will be apparent that the described embodiments are only some, but not all, embodiments of the application. Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application for the embodiment. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the application, the scope of which is defined by the claims and their equivalents.
Claims (6)
1. An electromechanical brake apparatus, comprising:
the device comprises a shell, wherein a fixed cavity wall is arranged in the shell, a first cavity and a second cavity are respectively arranged at two sides of the fixed cavity wall, a first motor is arranged in the first cavity, a first pinion is arranged on an output shaft of the first motor and is in meshed connection with a first large gear, the first large gear is fixedly connected with a first ball screw shaft, the first ball screw shaft is rotationally connected with a first ball screw nut, and one end face of the first ball screw nut is fixedly connected with a transmission push rod;
the second cavity is fixedly provided with a second motor, an output shaft of the second motor is provided with a second pinion, the second pinion is rotationally connected with a second ball screw nut, and the second ball screw nut is rotationally connected with a second ball screw shaft; the second ball screw shaft is connected with the transmission sleeve in a sliding manner; the transmission sleeve is connected with the transmission push rod in a sliding manner;
a first brake inlay; a transmission piston is arranged in the first brake inlay, a reset spring is coaxially sleeved on the surface of the transmission piston, one end of the transmission piston is fixedly connected with the transmission sleeve, and the other end of the transmission piston is movably connected with a first friction plate;
a second brake inlay; the second brake inlay is rotationally connected with a lever, the middle part of the lever is rotationally connected with the shell through a rotating shaft, the other end of the lever is rotationally connected with the first brake inlay, a second friction plate is arranged on the surface of the second brake inlay far away from the lever, and the second friction plate and the first friction plate are coaxially arranged;
the second ball screw nut is provided with a screw shaft matching hole, the second ball screw shaft passes through the screw shaft matching hole and is coaxially arranged with the second ball screw nut, the surface of the second ball screw nut is fixedly provided with a second large gear, and the second large gear is meshed with the second small gear;
the second ball screw shaft is sequentially provided with a first installation through hole and a second installation through hole along the axis, the aperture of the second installation through hole is larger than that of the first installation through hole, one end of the transmission sleeve is abutted to the bottom surface of the second installation through hole, and the outer wall of the transmission sleeve is in clearance fit with the inner wall of the second installation through hole.
2. The electromechanical brake apparatus according to claim 1, wherein the transmission sleeve is provided with a transmission groove along the axial direction, one end of the transmission push rod passes through the first mounting through hole to abut against the bottom of the transmission groove, and the outer wall of the transmission push rod is in clearance fit with the inner wall of the transmission groove.
3. The electromechanical brake apparatus according to claim 1, wherein the first brake inlay is provided with a stopper mounting cavity, a stepped groove is provided in an inner wall of the stopper mounting cavity, the transmission piston is mounted in the stopper mounting cavity, a seal retainer ring is fixedly provided on an outer surface of the transmission piston, the seal retainer ring is disposed in the stepped groove, one end of the return spring abuts against a surface of the seal retainer ring, and the other end of the return spring abuts against a side wall of the stepped groove.
4. An electromechanical brake apparatus according to claim 3 wherein a guide bolt is slidably connected to the bottom of the first brake inlay remote from the spacing mounting cavity, one end of the guide bolt being fixedly connected to a caliper bracket, and a guide stopper being fixedly provided on the top of the first brake inlay remote from the spacing mounting cavity.
5. The electromechanical brake apparatus according to claim 1, wherein the second brake inlay is provided with a guide limit groove on an inner wall surface thereof, the guide limit groove being slidably connected to the guide limit block.
6. A vehicle comprising an electromechanical brake apparatus according to any one of claims 1 to 5.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310468716.3A CN116394902B (en) | 2023-04-27 | 2023-04-27 | Electromechanical braking device, braking method and vehicle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310468716.3A CN116394902B (en) | 2023-04-27 | 2023-04-27 | Electromechanical braking device, braking method and vehicle |
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| CN116394902A CN116394902A (en) | 2023-07-07 |
| CN116394902B true CN116394902B (en) | 2023-08-18 |
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| Publication number | Publication date |
|---|---|
| CN116394902A (en) | 2023-07-07 |
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