CN113071467A - Decoupling type electric power-assisted brake device - Google Patents
Decoupling type electric power-assisted brake device Download PDFInfo
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- CN113071467A CN113071467A CN202110514878.7A CN202110514878A CN113071467A CN 113071467 A CN113071467 A CN 113071467A CN 202110514878 A CN202110514878 A CN 202110514878A CN 113071467 A CN113071467 A CN 113071467A
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- 238000004088 simulation Methods 0.000 claims abstract description 41
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- 230000033001 locomotion Effects 0.000 claims description 4
- 239000004677 Nylon Substances 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
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- 238000009434 installation Methods 0.000 description 4
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- 238000002485 combustion reaction Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000002567 autonomic effect Effects 0.000 description 1
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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
- B60T13/745—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 acting on a hydraulic system, e.g. a master cylinder
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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
- B60T7/00—Brake-action initiating means
- B60T7/02—Brake-action initiating means for personal initiation
- B60T7/04—Brake-action initiating means for personal initiation foot actuated
- B60T7/042—Brake-action initiating means for personal initiation foot actuated by electrical means, e.g. using travel or force sensors
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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
- B60T7/00—Brake-action initiating means
- B60T7/02—Brake-action initiating means for personal initiation
- B60T7/04—Brake-action initiating means for personal initiation foot actuated
- B60T7/06—Disposition of pedal
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Braking Elements And Transmission Devices (AREA)
- Braking Systems And Boosters (AREA)
Abstract
The invention discloses a decoupling type electric power-assisted brake device which comprises a box body, a pedal foot feel simulation mechanism, a transmission mechanism, an anti-rotation mechanism, a brake main cylinder, an angle sensor, a motor and a pedal, wherein the pedal foot feel simulation mechanism is arranged on the box body; the rotation angle change of the pedal is fed back to a brake control system through an angle sensor to control the motor to work, the motor drives a transmission mechanism to synchronously rotate and axially push an anti-rotation mechanism through the transmission mechanism, and a brake master cylinder is pushed through a part in the anti-rotation mechanism to complete braking; the pedal feel simulation mechanism penetrates through the transmission mechanism and has a decoupling gap with the anti-rotation mechanism, the pedal feel simulation mechanism can eliminate the decoupling gap and directly axially push the anti-rotation mechanism, and parts in the anti-rotation mechanism push the brake master cylinder to complete failure emergency braking. The invention adopts the layout mode of decoupling the electric power and the pedal force, and has comfortable foot feel, safety and reliability; the device has the advantages of simple structure, quick response, low noise and the like, and can meet the requirement of autonomous braking in automatic driving.
Description
Technical Field
The invention belongs to the technical field of brakes, and particularly relates to a decoupling type electric power-assisted brake device.
Background
The brake system is an important part of automobile running control, and at present, an automobile brake power assisting device mostly adopts a vacuum booster form; with the development of new energy automobiles and unmanned technologies, the requirements of automobiles on braking systems are higher and higher. Because the power system of the electric automobile replaces the internal combustion engine by the driving motor, the traditional vacuum power-assisted brake can not obtain the vacuum power-assisted source from the internal combustion engine any more, and in order to enable the traditional vacuum power-assisted brake to be used, the electronic vacuum pump controlled by the electronic controller to operate can not be additionally used in the prior art, and the vacuum source is generated in the vacuum storage tank through the vacuum pump and then provided for the vacuum power-assisted brake.
The transmission vacuum booster is gradually replaced by an electric booster brake due to the fact that an engine is required to provide a vacuum environment, the response speed is low, the energy consumption is high, and the braking force is small. The electric power-assisted brake adjusts the power-assisted size through the output torque of control motor, and current electric power-assisted brake still has connection control complicacy, responds fast enough and feel the poor scheduling problem of comfort level with the foot, needs to improve.
Disclosure of Invention
The present invention is directed to solve the above problems in the background art, and provides a decoupled electric power-assisted brake apparatus.
In order to achieve the purpose, the technical scheme of the invention is as follows: a decoupling type electric power-assisted brake device comprises a box body, a pedal foot feel simulation mechanism, a transmission mechanism, an anti-rotation mechanism, a brake main cylinder, an angle sensor, a motor and a pedal, wherein the pedal foot feel simulation mechanism and the anti-rotation mechanism are correspondingly arranged on two sides of the box body;
the pedal is respectively connected with the frame and the pedal foot feeling simulation mechanism through a hinge device, and the angle sensor is connected with the frame through a bracket and can monitor and sense the rotation angle change of the pedal; the rotation angle change of the pedal is fed back to a brake control system through an angle sensor, then a motor is controlled to work, the motor drives a transmission mechanism to synchronously rotate and axially push an anti-rotation mechanism through the transmission mechanism, and therefore the brake master cylinder is pushed through parts in the anti-rotation mechanism to complete the brake work;
the parts in the pedal foot feel simulation mechanism penetrate through the transmission mechanism and have decoupling gaps with the anti-rotation mechanism, the pedal foot feel simulation mechanism can eliminate the decoupling gaps and axially push the anti-rotation mechanism, and therefore the parts in the anti-rotation mechanism push the brake master cylinder to complete failure emergency braking work.
When the brake is used in cooperation with an automobile, three cooperation use modes are provided: the brake control system controls the motor to work, and the anti-rotation mechanism is pushed axially by synchronously driving the transmission mechanism, so that the anti-rotation mechanism pushes the brake master cylinder to complete normal braking work; when the brake master cylinder is in a failure backup brake mode, namely an angle sensor or a motor fails, the controller sends an alarm at the moment, the pedal is stepped down, the decoupling gap is eliminated, and the pedal is continuously stepped down, so that the anti-rotation mechanism can be pushed to push the brake master cylinder to complete failure emergency brake work; the automatic braking mode is that the braking control system controls the braking work of the motor after receiving the automatic driving monitoring information of the automobile.
In the decoupling type electric power-assisted brake device, the anti-rotation mechanism comprises an anti-rotation cylinder, a power-assisted valve body, a piston push rod, an anti-rotation plate and a return spring, the anti-rotation cylinder is fixedly connected with the box body and provided with an axial positioning groove, the positioning mechanism is an anti-rotation positioning column which is arranged on the power-assisted valve body and positioned in the axial positioning groove, the anti-rotation plate is fixedly connected with the power-assisted valve body and fixedly connected with a component on the transmission mechanism through a radial locking nut, the piston push rod is arranged in the power-assisted valve body, and two ends of the piston push rod respectively correspond to the components of the brake master cylinder and the pedal feel simulation mechanism; the brake main cylinder is fixedly connected with the anti-rotation cylinder body through a main cylinder connecting plate, and two ends of the return spring are respectively abutted against the power-assisted valve body and the brake main cylinder.
In foretell electronic helping hand arresting gear of decoupling type, drive mechanism includes worm, helical gear, trapezoidal lead screw, the both ends of helical gear are provided with double-row angular contact ball bearing respectively, the helical gear both ends form the location through double-row angular contact ball bearing respectively with footboard feel analog mechanism, prevent that the favourable turn constructs and be connected, the worm passes through the shaft coupling and is connected with motor drive, the helical gear is equipped with trapezoidal thread, with trapezoidal lead screw thread fit, trapezoidal lead screw passes through foretell radial lock nut and prevents that the flitch is fixed connection, the helical gear drives trapezoidal lead screw motion, prevent that the flitch pushes away the helping hand valve body in to preventing the favourable turn and make it be axial motion to preventing the favourable turn to construct, thereby the piston push.
In the decoupling type electric power-assisted brake device, the pedal foot feel simulation mechanism comprises a pedal connecting rod, a connecting rod seat and a foot feel simulation spring, the connecting rod seat is fixedly connected with the box body, one end of the pedal connecting rod is connected with the pedal, the other end of the pedal connecting rod is respectively arranged in the connecting rod seat and the trapezoidal screw rod through hole in a penetrating manner, the pedal connecting rod corresponds to the piston push rod to form the decoupling gap, the pedal connecting rod can slide in the trapezoidal screw rod through hole and can eliminate the decoupling gap to be abutted against the piston push rod, so that the power-assisted valve body and the piston push rod in the anti-rotation mechanism are axially positioned and moved, and the piston push rod pushes the brake master cylinder; the pedal connecting rod is provided with a positioning boss, the connecting rod seat is provided with an end cover for positioning the positioning boss, and the foot feeling simulation spring is sleeved on the pedal connecting rod and is respectively abutted against the connecting rod seat and the positioning boss.
In the decoupling type electric power-assisted brake device, the pedal connecting rod is sleeved with the connecting rod guide sleeve, one end of the connecting rod guide sleeve is abutted to the positioning boss, and the other end of the connecting rod guide sleeve is abutted to the foot feeling simulation spring.
In the decoupling type electric power-assisted braking device, a mounting groove is formed in the power-assisted valve body, a connecting hole is formed in the end face, corresponding to the pedal connecting rod, of the piston push rod, the anti-rotating plate is fixedly connected into the anti-rotating plate mounting groove, and the radial locking nut is located in the connecting hole and forms the decoupling gap with the bottom of the connecting hole.
In the decoupling type electric power-assisted brake device, a buffer block is arranged in the connecting hole.
In the decoupling type electric power-assisted brake device, the anti-rotation cylinder and the connecting rod seat are respectively provided with a bearing mounting hole for mounting a double-row angular contact ball bearing.
In the above-mentioned decoupled electric power-assisted brake apparatus, the helical gear is made of reinforced nylon.
In the decoupling type electric power-assisted braking device, a needle bearing is arranged on the anti-rotation positioning column.
By adopting the technical scheme, the invention has the following beneficial effects:
the invention can be matched with the device to realize the work of power-assisted braking no matter a traditional automobile or a new energy electric automobile without a vacuum power-assisted source; compared with the prior art, the auxiliary power source is provided without installing an additional vacuum pump and matched parts, the whole structure is compact, and the installation space of the vehicle is saved.
The invention adopts the angle sensor to cooperate with the pedal feel simulation mechanism to feed the treading information of the pedal back to the control system of the automobile, thereby pushing the brake master cylinder to achieve the braking work by controlling the transmission mechanism and the anti-rotation mechanism through the transmission control of the motor; adopt motor drive trapezoidal lead screw to produce braking helping hand, the device has simple structure, response fast, the noise is little, the energy consumption is low, advantages such as safe and reliable, satisfies the demand of autonomic brake braking in the autopilot moreover.
Drawings
FIG. 1 is a perspective view of the present invention;
fig. 2 is a cross-sectional view of the present invention.
Detailed Description
The invention is further explained with reference to the drawings.
Referring to fig. 1 and 2, the invention provides a decoupling type electric power-assisted brake device, which comprises a box body 1, a pedal foot feel simulation mechanism 2, a transmission mechanism 3, an anti-rotation mechanism 4, a brake main cylinder 5, an angle sensor 6, a motor 7 and a pedal 8, wherein the pedal foot feel simulation mechanism 2 and the anti-rotation mechanism 4 are correspondingly arranged on two sides of the box body 1, the transmission mechanism 3 is arranged in the box body 1, the anti-rotation mechanism 4 is provided with a positioning mechanism for enabling the anti-rotation mechanism to axially move, and the motor 7 and the angle sensor 6 are connected with a brake control system;
the pedal 8 is respectively connected with the frame and the pedal foot feeling simulation mechanism 2 through a hinge device, the angle sensor 6 is connected with the frame through a support (the installation connection of the angle sensor 6 is not shown in the figure), the angle sensor 6 is correspondingly positioned on one side surface of the pedal 8 and is a Hall angle sensor, and the pedal 8 is provided with an induction shaft (not shown in the figure) which corresponds to the Hall angle sensor and can be monitored and sensed; therefore, the rotation angle change of the pedal 8 is monitored by the Hall angle sensor 6 and fed back to the brake control system, the motor 7 is controlled by the automobile system to work, the motor 7 drives the transmission mechanism 3 to synchronously rotate and axially push the anti-rotation mechanism 4 through the transmission mechanism, and the anti-rotation mechanism 4 pushes the brake master cylinder 5 to complete the brake work;
the parts in the pedal foot feeling simulation mechanism 2 penetrate through the transmission mechanism 3 and have decoupling gaps 9 with the anti-rotation mechanisms 4, the parts in the pedal foot feeling simulation mechanism 2 can eliminate the decoupling gaps 9 and axially push the parts in the anti-rotation mechanisms 4, and therefore the parts in the anti-rotation mechanisms 4 push the brake master cylinder 5 to complete failure emergency braking work.
Specifically, the anti-rotation mechanism 4 comprises an anti-rotation cylinder 10, a power-assisted valve body 11, a piston push rod 12, an anti-rotation plate 13 and a return spring 14, wherein the anti-rotation cylinder 10 is fixedly connected with the box body 1 and is provided with an axial positioning groove 15, the positioning mechanism is an anti-rotation positioning column 16 which is arranged on the power-assisted valve body 11 and is positioned in the axial positioning groove 15, the anti-rotation plate 13 is fixedly connected with the power-assisted valve body 11 and is fixedly connected with a component on the transmission mechanism 3 through a radial locking nut 17, the piston push rod 12 is arranged in the power-assisted valve body 11, and two ends of the piston push rod correspond to the components of the brake master cylinder 5 and the pedal feel; the brake main cylinder 5 is fixedly connected with the anti-rotation cylinder 10 through a main cylinder connecting plate 18, and two ends of the return spring 14 are respectively abutted against the boosting valve body 11 and the brake main cylinder 5.
Specifically, the transmission mechanism 3 comprises a worm 19, a helical gear 20 and a trapezoidal lead screw 21, two ends of the helical gear 20 are respectively provided with a double-row angular contact ball bearing 22, two ends of the helical gear 20 are respectively in positioning connection with the pedal foot feeling simulation mechanism 2 and the anti-rotation mechanism 4 through the double-row angular contact ball bearing 22, the worm 19 is in transmission connection with the motor 7 through a coupler 23, the helical gear 20 is provided with trapezoidal threads and is in threaded fit with the trapezoidal lead screw 21, the trapezoidal lead screw 21 is fixedly connected with the anti-rotation plate 13 through the radial locking nut 17, the helical gear 20 drives the trapezoidal lead screw 21 to move, and the assisting valve body 11 and the piston push rod 12 in the anti-rotation mechanism 4 are pushed by the anti-rotation plate 13 to axially move, so that the piston push rod 12 pushes; the helical gear 20 is made of reinforced nylon, and has good wear resistance and low noise.
Specifically, the pedal foot feeling simulation mechanism 2 comprises a pedal connecting rod 24, a connecting rod seat 25 and a foot feeling simulation spring 26, the connecting rod seat 25 is fixedly connected with the box body 1, one end of the pedal connecting rod 24 is connected with the pedal 8, the other end of the pedal connecting rod 24 is respectively arranged in through holes of the connecting rod seat 25 and the trapezoidal screw rod 21 in a penetrating manner, the pedal connecting rod 24 corresponds to the piston push rod 12 to form the decoupling gap 9, the pedal connecting rod 24 can slide in the through hole of the trapezoidal screw rod 21 and can eliminate the decoupling gap 9 from abutting against the piston push rod 12, so that the boosting valve body 11 and the piston push rod 12 in the anti-rotation mechanism 4 are pushed to enable the two to move axially, and the piston push rod 12 pushes the brake master cylinder 5 to complete; the pedal connecting rod 24 is provided with a positioning boss 27, the connecting rod seat 25 is provided with an end cover 28 for positioning the positioning boss 27, and the foot feeling simulation spring 26 is sleeved on the pedal connecting rod 24 and is respectively abutted against the connecting rod seat 25 and the positioning boss 27.
Further, a connecting rod guide sleeve 29 is sleeved on the pedal connecting rod 24, one end of the connecting rod guide sleeve 29 is abutted and mounted on the positioning boss 27, and the other end of the connecting rod guide sleeve 29 is abutted and mounted with the foot feeling simulation spring 26; the connecting rod guide sleeve 29 can improve the stability of the positioning and sliding of the pedal connecting rod 24, and meanwhile, the connecting rod guide sleeve 29 is also provided with a spring abdicating hole 30 to avoid the influence on the transmission work of the trapezoidal screw rod 21.
Further, an installation groove 31 is formed in the power-assisted valve body 11, and a connection hole 32 is formed in the end face, corresponding to the pedal connecting rod 24, of the piston push rod 12; the anti-rotation plate 13 is fixedly connected in the anti-rotation plate mounting groove 31 so as to complete the positioning and mounting of the whole transmission mechanism 3, and the radial locking nut 17 is positioned in the connecting hole and forms the decoupling gap 9 with the bottom of the connecting hole 32; the corresponding connection installation relation among the power-assisted valve body 11, the anti-rotation plate 13, the piston push rod 12 in the anti-rotation mechanism 4, the trapezoidal screw rod 21 in the transmission mechanism 3 and the pedal connecting rod 24 in the pedal foot feeling simulation mechanism 2 is simple, the occupation of excessive connection space among components is reduced, and the whole structure of the device is further compact.
Further, a buffer block 33 is disposed in the connection hole 32, so that the pedal connection rod 24 is prevented from violently striking the piston rod 12 in an emergency braking state.
Furthermore, the anti-rotation cylinder 10 and the connecting rod seat 25 are respectively provided with a bearing mounting hole 34 for mounting the double-row angular contact ball bearing 22, so that the positioning, mounting and connecting of the whole transmission mechanism 3 are completed.
Further, in order to improve the stability and smoothness of the axial movement and positioning of the whole transmission mechanism 3, the anti-rotation positioning column 16 is provided with a needle bearing 35.
The working principle of the invention is further explained as follows:
normal braking mode: during normal braking, a driver steps on the pedal 8, the pedal 8 compresses the foot feeling simulation spring 26, the foot feeling simulation spring 26 provides foot feeling feedback force for the driver, the angle sensor 6 monitors the rotation angle of the pedal 8, an angle signal is transmitted to the brake control system, and the brake control system analyzes the current brake intention of the driver; after an appropriate braking mode is selected according to the rotation angle of the pedal 8 monitored by the angle sensor 6, the braking control system controls the motor 7 to rotate, the motor 7 drives the worm 19 to rotate through the coupler 23, the worm 19 drives the helical gear 20 to rotate, the torque of the motor 7 is amplified, and the larger the rotation angle monitored by the angle sensor 6 is, the larger the torque controlled and output by the motor 7 is; the bevel gear 20 drives the trapezoidal screw rod 21 to move, amplified torque acts on the trapezoidal screw rod 21, the trapezoidal screw rod 21 is fixedly connected with the power-assisted valve body 11 through the anti-rotating plate 13, and the power-assisted valve body 11 forms anti-rotating positioning with the axial positioning groove 15 through the anti-rotating positioning column 16, so that the trapezoidal screw rod 21 can only rotate linearly, the trapezoidal screw rod 21 drives the power-assisted valve body 11 to move backwards, and the anti-rotating positioning column 16 on the power-assisted valve body 11 moves in the axial positioning groove 15 of the anti-rotating cylinder 10; the boosting valve body 11 pushes the piston push rod 12 to move backwards, the piston push rod 12 pushes against a piston in the brake master cylinder 5 to move backwards together, brake oil in the brake master cylinder 5 is pressed into brake cylinders of front and rear wheels of the automobile, brake fluid pressure is generated, and braking is finished. After braking is finished, the motor 7 rotates reversely to drive the power-assisted valve body 11 and other structures to reset quickly, the compressed return spring 14 pushes the power-assisted valve body 11 to accelerate the resetting speed, the foot feeling simulation spring 26 pushes the pedal connecting rod 24 to reset the pedal 8, and the power-assisted braking device amplifies and converts the torque of the motor 7 to the thrust of the trapezoidal screw rod 21 to achieve the purpose of power-assisted braking.
Failure backup braking mode: when the motor 7 or the angle sensor 6 fails, the braking device enters a manual failure backup mode, the braking control system gives an alarm and prompts a driver to enter the manual failure backup mode, and the driver completes braking through manpower. The driver presses the pedal 8, the pedal 8 pushes the pedal connecting rod 24 to move backwards, the pedal connecting rod 24 compresses the foot feeling simulation spring 26, and the driver continues to press the pedal to eliminate the decoupling gap 9 between the tail end of the pedal connecting rod 24 and the piston push rod 12; the pedal 8 is continuously stepped down, the pedal connecting rod 24 contacts the buffer block 33 in the piston push rod 12, the buffer block 33 and the piston push rod 12 are pushed to move backwards together, the piston push rod 12 pushes the brake master cylinder 5 to move backwards, and the emergency braking is completed.
Automatic braking mode: the automatic driving monitoring part on the automobile can feed monitoring information back to the brake control system, and the brake control system can control the motor to work after receiving the automatic driving monitoring information of the automobile and then perform execution actions in the normal brake mode.
It should be noted that: in the normal braking process, the rotating angle of the pedal 8 can immediately feed back a braking control system through an angle sensor 6, the braking control system can control a motor to carry out transmission braking work, the servo assistance of the braking device is only provided by the motor 7, so that the structure and the control algorithm of the brake are simpler, and the foot feel of a driver is consistent, and therefore a decoupling gap 9 is always reserved between the pedal connecting rod 24 and the piston push rod 12; when the motor 7 fails, the pedal connecting rod 24 slides rapidly in the trapezoidal screw rod 21 to rapidly eliminate the decoupling gap 9, emergency braking is completed without driving the speed reducing mechanism to rotate, so that the force loss of the pedal 8 is smaller, the braking force of the emergency braking is larger, a driver is safer, and when the force of the pedal 8 is 500N, the braking deceleration of the failure backup braking reaches 0.35 g.
In addition, the foot feeling simulation spring 26 provides feedback force for a driver to realize linear foot feeling, certain pre-pressure is generated when the foot feeling simulation spring 26 is installed to simulate the initial power characteristic of the vacuum booster, and the situation that the driver mistakenly touches the automobile downhill and the like to cause misjudgment of braking intention and generate wrong braking is avoided. Meanwhile, the feedback force of the pedal 8 felt by the driver is only related to the angle of the pedal 8 stepped on by the driver and linearly increases, and the foot feeling is kept consistent under different braking modes.
The decoupling type electric power-assisted brake device provided by the embodiment of the invention is described in detail above, a specific example is applied in the description to explain the principle and the implementation manner of the invention, and the description of the embodiment is only used for helping to understand the technical scheme disclosed by the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation of the present invention.
Claims (10)
1. A decoupling type electric power-assisted brake device is characterized in that: the pedal foot feeling simulation mechanism and the anti-rotation mechanism are correspondingly arranged on two sides of the box body, the transmission mechanism is arranged in the box body, the anti-rotation mechanism is provided with a positioning mechanism which enables the anti-rotation mechanism to axially move, and the motor and the angle sensor are connected with a brake control system;
the pedal is respectively connected with the frame and the pedal foot feeling simulation mechanism through a hinge device, and the angle sensor is connected with the frame through a bracket and can monitor and sense the rotation angle change of the pedal; the rotation angle change of the pedal is fed back to a brake control system through an angle sensor, then a motor is controlled to work, the motor drives a transmission mechanism to synchronously rotate and axially push an anti-rotation mechanism through the transmission mechanism, and therefore the brake master cylinder is pushed through parts in the anti-rotation mechanism to complete the brake work;
the parts in the pedal foot feel simulation mechanism penetrate through the transmission mechanism and have decoupling gaps with the anti-rotation mechanism, the pedal foot feel simulation mechanism can eliminate the decoupling gaps and directly axially push the anti-rotation mechanism, and therefore the parts in the anti-rotation mechanism push the brake master cylinder to complete failure emergency braking work.
2. A decoupled electrically assisted brake apparatus according to claim 1, characterized in that: the anti-rotation mechanism comprises an anti-rotation cylinder body, a power-assisted valve body, a piston push rod, an anti-rotation plate and a return spring, the anti-rotation cylinder body is fixedly connected with the box body and provided with an axial positioning groove, the positioning mechanism is an anti-rotation positioning column which is arranged on the power-assisted valve body and positioned in the axial positioning groove, the anti-rotation plate is fixedly connected with the power-assisted valve body and fixedly connected with a part on the transmission mechanism through a radial locking nut, the piston push rod is arranged in the power-assisted valve body, and two ends of the piston push rod respectively correspond to parts of the brake master cylinder and the pedal foot; the brake main cylinder is fixedly connected with the anti-rotation cylinder body through a main cylinder connecting plate, and two ends of the return spring are respectively abutted against the power-assisted valve body and the brake main cylinder.
3. A decoupled electrically assisted brake apparatus according to claim 2, characterized in that: the transmission mechanism comprises a worm, a helical gear and a trapezoidal lead screw, two ends of the helical gear are respectively provided with a double-row angular contact ball bearing, two ends of the helical gear are respectively connected with the pedal foot feeling simulation mechanism and the anti-rotation mechanism in a positioning mode through the double-row angular contact ball bearing, the worm is connected with the motor in a transmission mode through a coupler, the helical gear is provided with a trapezoidal thread and is in threaded fit with the trapezoidal lead screw, the trapezoidal lead screw is fixedly connected with the anti-rotation plate through the radial locking nut, and the helical gear drives the trapezoidal lead screw to move and pushes the anti-rotation mechanism to.
4. A decoupled electrically assisted brake apparatus according to claim 3, characterized in that: the pedal foot feeling simulation mechanism comprises a pedal connecting rod, a connecting rod seat and a foot feeling simulation spring, the connecting rod seat is fixedly connected with the box body, one end of the pedal connecting rod is connected with the pedal, the other end of the pedal connecting rod is respectively arranged in the connecting rod seat and the trapezoidal screw rod through hole in a penetrating mode, the pedal connecting rod corresponds to the piston push rod to form the decoupling gap, the pedal connecting rod can slide in the trapezoidal screw rod through hole and can eliminate the decoupling gap to be abutted against the piston push rod, and therefore the brake master cylinder is directly pushed through the axial positioning movement of the piston push rod; the pedal connecting rod is provided with a positioning boss, the connecting rod seat is provided with an end cover for positioning the positioning boss, and the foot feeling simulation spring is sleeved on the pedal connecting rod and is respectively abutted against the connecting rod seat and the positioning boss.
5. A decoupled electrically assisted brake apparatus according to claim 4, wherein: the pedal connecting rod is sleeved with a connecting rod guide sleeve, one end of the connecting rod guide sleeve is abutted against the positioning boss, and the other end of the connecting rod guide sleeve is abutted against the foot feeling simulation spring.
6. A decoupled electrically assisted brake apparatus according to claim 2, characterized in that: the power-assisted valve is characterized in that a mounting groove is formed in the power-assisted valve body, a connecting hole is formed in the end face, corresponding to the pedal connecting rod, of the piston push rod, the anti-rotating plate is fixedly connected into the anti-rotating plate mounting groove, and the radial locking nut is located in the connecting hole and forms the decoupling gap with the bottom of the connecting hole.
7. A decoupled electrically assisted brake apparatus according to claim 6, characterized in that: and a buffer block is arranged in the connecting hole.
8. A decoupled electrically assisted brake apparatus according to claim 3 or 4, characterized in that: and bearing mounting holes for mounting the double-row angular contact ball bearings are respectively formed in the anti-rotation cylinder and the connecting rod seat.
9. A decoupled electrically assisted brake apparatus according to claim 3, characterized in that: the bevel gear is made of reinforced nylon.
10. A decoupled electrically assisted brake apparatus according to claim 2, characterized in that: and a needle bearing is arranged on the anti-rotation positioning column.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110514878.7A CN113071467B (en) | 2021-05-12 | 2021-05-12 | Decoupling type electric power-assisted braking device |
| PCT/CN2021/141136 WO2022237179A1 (en) | 2021-05-12 | 2021-12-24 | Decoupling type electric power-assisted brake device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110514878.7A CN113071467B (en) | 2021-05-12 | 2021-05-12 | Decoupling type electric power-assisted braking device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113071467A true CN113071467A (en) | 2021-07-06 |
| CN113071467B CN113071467B (en) | 2024-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110514878.7A Active CN113071467B (en) | 2021-05-12 | 2021-05-12 | Decoupling type electric power-assisted braking device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN113071467B (en) |
| WO (1) | WO2022237179A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113978432A (en) * | 2021-11-24 | 2022-01-28 | 吉林东光奥威汽车制动系统有限公司 | Pedal decoupling structure for automobile braking energy recovery |
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| CN113071467B (en) | 2024-04-12 |
| WO2022237179A1 (en) | 2022-11-17 |
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