CN113997917B - Mechanical hydraulic component of electronic brake booster capable of being mechanically and hydraulically decoupled - Google Patents
Mechanical hydraulic component of electronic brake booster capable of being mechanically and hydraulically decoupled Download PDFInfo
- Publication number
- CN113997917B CN113997917B CN202111407833.6A CN202111407833A CN113997917B CN 113997917 B CN113997917 B CN 113997917B CN 202111407833 A CN202111407833 A CN 202111407833A CN 113997917 B CN113997917 B CN 113997917B
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- Prior art keywords
- magnet seat
- seat assembly
- valve body
- piston
- hydraulic
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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
-
- 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
-
- 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
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
- B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
- B60T8/40—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system
- B60T8/4072—Systems in which a driver input signal is used as a control signal for the additional fluid circuit which is normally used for braking
- B60T8/4081—Systems with stroke simulating devices for driver input
- B60T8/409—Systems with stroke simulating devices for driver input characterised by details of the stroke simulating device
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Braking Systems And Boosters (AREA)
Abstract
The invention relates to a mechanical hydraulic component of an electronic brake booster capable of being mechanically and hydraulically decoupled, and belongs to the field of automobile braking. The magnet seat component is rigidly connected with the support, the valve body and the support are assembled with the support plate into a whole through interference, the valve body and the screw are assembled into a whole through interference, the valve body and the magnet seat component are in clearance fit and can slide relatively, the piston and the pressing block are in interference fit, the piston and the magnet seat component are in clearance fit and can slide relatively, the piston spring is positioned in the piston, the valve body, the magnet seat component, the piston, the leather cup and the sealing ring are connected into a sealing cavity, and the magnet seat component are fixedly connected. The automobile brake energy recovery device has the advantages that the structure is novel, mechanical hydraulic decoupling can be realized, the mechanical hydraulic component can transmit thrust through hydraulic pressure, and the booster brings larger endurance for the automobile when the automobile brake energy is recovered.
Description
Technical Field
The invention belongs to the field of automobile braking, and particularly relates to a mechanical hydraulic component of an electronic brake booster capable of being mechanically and hydraulically decoupled.
Background
In the current automobile braking industry, the application of the vacuum booster still occupies a great proportion, but with the continuous development of new energy automobiles and automatic driving, the conventional vacuum booster cannot meet the requirements of active braking and braking energy recovery, so the electronic brake booster is applied and becomes the main stream in the future.
In the existing automobile electronic brake booster products, such as bosch ibososter and the like, a complete mechanical connection mode is used, and a driver pedal is directly connected with a booster, and the booster is mechanically connected with a brake master cylinder. This approach results in a brake booster that cannot be fully decoupled during vehicle braking energy recovery, so that the brake needs to cooperate with the ESC to perform braking energy recovery, the brake feel is poor, and the recovery efficiency is low.
Disclosure of Invention
The invention provides a mechanical hydraulic component of an electronic brake booster capable of mechanically and hydraulically decoupling, which aims to solve the problems that the brake booster cannot complete full decoupling when the brake energy of a vehicle is recovered at present, so that the brake needs to be matched with an ESC for brake energy recovery, the brake foot feeling is poor, and the recovery efficiency is low.
The technical scheme adopted by the invention is as follows: the device comprises a bracket, a pressing block, a piston spring, a magnet seat assembly, a sealing ring, a valve body, a leather cup, a screw rod, a supporting plate and a magnet, wherein the valve body and the supporting plate are assembled into a whole through interference, the bracket and the supporting plate are assembled into a whole through a gap, the valve body and the screw rod are assembled into a whole through interference, the valve body and the magnet seat assembly are in clearance fit and can slide relatively, the piston and the pressing block are in interference fit, the piston and the magnet seat assembly are in clearance fit and can slide relatively, the piston spring is positioned in the piston, the valve body, the magnet seat assembly, the piston, the leather cup and the sealing ring are connected into a sealing cavity, and the magnet seat assembly are fixedly connected;
when the booster works normally, the brake pedal is stepped on to drive the magnet seat assembly to move to form displacement difference, the motor is started to drive the screw rod and the valve body to follow, and the pressing block can prop the feedback disc to form the booster because of the hydraulic pressure in the sealing cavity and the support of the piston spring;
when the booster needs braking energy recovery, the torque output of the motor is reduced, the following performance of the screw and the valve body is poor, at the moment, the pedal input force is only larger than the hydraulic supporting force of the sealing cavity, the magnet seat assembly is moved for a certain distance, the sealing of the hydraulic sealing cavity is released, namely the hydraulic supporting is eliminated, the magnet seat assembly and the valve body move relatively, and at the moment, the piston spring provides a brake pedal feel for a driver;
when the motor of the booster fails, after the pedal input force moves the magnet seat assembly for a certain distance, the magnet seat assembly is rigidly connected with the bracket, and at the moment, the pedal input force is transmitted to the brake master cylinder through the bracket, so that braking is brought.
The bracket is made of plastic materials with stronger toughness.
The supporting plate is made of metal.
The screw thread of the screw rod is a non-self-locking screw thread.
When the leather cup 8 is sealed with the magnet seat assembly 5 through the oil hole, a hydraulic support is formed.
When the leather cup 8 and the magnet seat assembly 5 pass through the oil hole to circulate, the hydraulic support fails.
The invention has the advantages that the structure is novel, the mechanical-hydraulic decoupling can be realized, namely, the driver pedal is mechanically separated from the brake master cylinder, when the vehicle needs to brake energy to be recovered, the foot feeling of the driver is simulated by the stroke simulator formed by the springs, and the booster can not brake or brake in a small amount; when the motor of the booster is damaged, the mechanical hydraulic part can be directly and mechanically connected with the main cylinder after the idle stroke feeding is finished, and a driver can directly decelerate the vehicle through a brake pedal at the moment; when the booster is actively pressurized, the mechanical hydraulic component can transmit thrust through hydraulic pressure, so that the booster brings larger endurance to the vehicle when the braking energy of the vehicle is recovered.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
fig. 2 is an enlarged view of the portion I of fig. 1, showing a sealed state;
FIG. 3 is a schematic diagram of hydraulic support failure in accordance with the present invention;
FIG. 4 is an enlarged view of section II of FIG. 3;
FIG. 5 is a view of the invention installed in a booster assembly in use.
Detailed Description
The hydraulic piston comprises a support 1, a pressing block 2, a piston 3, a piston spring 4, a magnet seat assembly 5, a sealing ring 6, a valve body 7, a leather cup 8, a screw 9, a support plate 10 and a magnet 11, wherein the magnet seat assembly 5 is rigidly connected with the support 1, the valve body 7 and the support 1 are respectively assembled with the support plate 10 into a whole through interference, the valve body 7 and the screw 9 are assembled into a whole through interference, the valve body 7 and the magnet seat assembly 5 are in clearance fit and can slide relatively, the piston 3 and the pressing block 2 are in clearance fit, the piston 3 and the magnet seat assembly 5 are in clearance fit and can slide relatively, the piston spring 4 is positioned in the piston 3, the valve body 7, the magnet seat assembly 5, the piston 3, the leather cup 8 and the sealing ring 6 are connected into a sealing cavity A for storing liquid, and the magnet 11 is fixedly connected with the magnet seat assembly 5. The magnet 11 is in clearance fit with the sensor 121001 in the displacement sensor assembly 1210 and can slide axially relatively, and the relative displacement is generated by the relative sliding of the magnet 11 and the sensor 121001, so that a displacement signal is generated for controlling the motor to act;
when the booster works normally, the brake pedal is stepped on to drive the magnet seat assembly 5 to move to form displacement difference, the motor is started to drive the screw rod 9 and the valve body 7 to follow, and the pressure block 2 can support the feedback disc to form boosting force due to the fact that the hydraulic pressure in the sealing cavity is supported by the piston spring 4;
when the booster needs braking energy recovery, the torque output of the motor is reduced, the following performance of the screw rod 9 and the valve body 7 is poor, at the moment, the pedal input force is only larger than the hydraulic supporting force of the sealing cavity, the magnet seat assembly 5 is moved for a certain distance, the sealing of the hydraulic sealing cavity is released, namely the hydraulic supporting is eliminated, the magnet seat assembly 5 and the valve body 7 move relatively, and at the moment, the piston spring 3 provides a brake pedal feel for a driver;
when the motor of the booster fails, after the pedal input force moves the magnet seat assembly 5 for a certain distance, the magnet seat assembly 5 is rigidly connected with the bracket 1, and at the moment, the pedal input force is transmitted to the brake master cylinder through the bracket 1 to bring braking.
According to the invention, the bracket 1 is made of plastic materials with stronger toughness, such as nylon, polyethylene terephthalate and the like, and the bracket 1 is in interference fit with the metal support plate 10 with smaller volume through a buckle, so that the whole mechanism is lighter in weight.
The supporting plate 10 is made of metal.
The screw thread of the screw rod 9 is a non-self-locking screw thread and is in threaded connection with the transmission nut 1209 which is the same as the non-self-locking screw thread, and after the assistance of the mechanism is completed, the mechanism can be pressed back to the initial position under the action of the return spring 1204.
When the leather cup 8 and the magnet seat assembly 5 are sealed through the oil hole, a hydraulic support is formed, as shown in fig. 2; when the leather cup 8 and the magnet seat assembly 5 pass through the oil hole, the hydraulic support fails, as shown in fig. 4.
Principle of operation
Unlike available electric brake booster, the electric brake booster with mechanical hydraulic decoupling of the present invention has mechanical hydraulic structure to control the system coupling and decoupling.
As shown in fig. 5, the invention is assembled in an automobile electronic brake booster 12, the booster upper shell 1202 is connected with the lower shell 1219 through sealant, the brake master cylinder 1201 is connected with the upper shell 1202 through screw threads, the lower shell 1219 is connected with a bearing 1212 through clearance fit and limited by a retainer ring, a bearing sleeve 1213 is in interference fit with the bearing 1212, and a dust cover 1208 is in interference fit with the bearing sleeve 1213; the motor outputs power to the transmission shaft 1217, the transmission shaft 1217 is in interference riveting with the gear 1218, a gear 1216 arranged on the gear shaft 1215 is meshed with the gear 1218 and the gear 1211, the gear 1211 and the transmission nut 1209 are in clearance fit with each other, and the gear 1211 and the transmission nut 1209 are mutually attached under the action of the return spring 1204 and the reverse force, namely, the gear 1211 drives the transmission nut 1209 to rotate to transmit torque; the transmission nut 1209 is in screw transmission fit with the screw rod 9, the inside of the transmission nut 1209 and the outside of the screw rod 9 are trapezoidal and are not self-locking threads, and the rotation motion is changed into linear motion; by the clearance sliding fit between the support 1 and the guide rod 1203, the screw 9, the valve body 7, the support 1 and other parts are restrained from rotating along with the transmission nut 1209, and thus do reciprocating linear motion along the guide rod 1203.
The magnet 11 cooperates with the sensor 121001 in the displacement sensor 1210, and in a normal state, the magnet 11 moves forward along with the pedal of the driver to form a displacement difference with the sensor 121001, at this time, the motor is started to drive the parts such as the bracket 1, the displacement sensor 121001 and the like in the mechanical hydraulic part to move forward, so as to form a power assisting, until the difference between the magnet 11 and the sensor 121001 is eliminated (i.e. the power assisting is reset), at this time, the power assisting is completed, and the braking is released, which is opposite to the above. Since the present invention is a mechanical hydraulic decoupling booster, the driver foot feel is regulated by the push rod spring 1220 and the piston spring 4. When the booster system of the booster is abnormal (including abnormal motor, power supply or control program), as shown in fig. 1, the driver only needs to tread the pedal to enable the magnet seat assembly 5 to move by h1 distance, the distance between the bottom of the piston 3 and the magnet seat assembly 5 is h2, the magnet seat assembly 5 is rigidly connected with the bracket 1 at the moment, the pedal force of the driver enables the system to integrally advance, and the pedal input force of the driver enables the brake system to work at the moment, so that the brake is completed.
As shown in fig. 1 and 2, the pedal is connected with a valve rod 1222, the valve rod 1222 and a magnet seat assembly 5 are connected into a whole through a connecting piece 1208 in a threaded manner, a return spring seat 1221 is riveted with the valve rod 1222 into a whole, and the magnet seat assembly 5, a piston 3, a valve body 7, a sealing ring 6 and a leather cup 8 are assembled to form a sealing cavity A, and the cavity is filled with liquid.
As shown in fig. 1, when the booster works normally, the driver presses the brake pedal to drive the magnet seat assembly 5 to move to form displacement difference, the motor is started to drive the screw 9 and the valve body 7 to follow, and the pressure block 2 can prop against the feedback disc 1207 to form booster due to the hydraulic pressure in the sealing cavity and the support of the piston spring 4. When the booster needs braking energy to be recovered, the motor torque output is reduced, the following performance of the screw rod 9 and the valve body 7 is poor, and at the moment, the pedal input force is only required to be larger than the hydraulic supporting force of the sealing cavity, so that the magnet seat assembly 5 is moved for a certain distance. As shown in fig. 3 and 4, the hydraulic sealing cavity is released, that is, the hydraulic support is lost, the magnet seat assembly 5 and the valve body 7 move relatively h3, at this time, the piston spring 3 provides a brake pedal feel for the driver, when the booster motor fails, the driver pedal input force moves the magnet seat assembly 5 by a distance h1, the magnet seat assembly 5 is rigidly connected with the bracket 1, at this time, the driver input force can be transmitted to the brake master cylinder 1201 through the bracket 1, and braking is brought.
The specific application is as follows:
1. when the driver steps on the brake pedal, the valve rod 1222 pushes the magnet seat assembly 5 to move, and the mechanical hydraulic mechanism is in a coupling state due to the hydraulic pressure and the support of the piston spring 4, and the motor is started to form braking through the displacement difference formed by the magnet 11 and the displacement sensor 121001.
2. When the booster needs braking energy to be recovered, motor torque reduces, so that the following performance of the screw rod 9 and the valve body 7 is poor, the magnet seat assembly 5 is further advanced by the input force of a driver, the leather cup 8 is separated from the oil passing hole, the hydraulic support is invalid, at the moment, the magnet seat assembly 5 is separated from the valve body 7, and the foot feeling of the driver is regulated by the piston spring 4.
3. When the motor of the booster fails, after the hydraulic support fails due to the driver input force, the magnet seat assembly 5 is driven to move continuously, and when the displacement h1 is passed, the magnet seat assembly 5 is in rigid contact with the bracket 1, and at the moment, the driver input force directly acts on the brake master cylinder 1201 to bring braking.
Claims (6)
1. A mechanical hydraulic component of a mechanically hydraulically decoupled electric brake booster, characterized in that: the device comprises a bracket, a pressing block, a piston spring, a magnet seat assembly, a sealing ring, a valve body, a leather cup, a screw rod, a supporting plate and a magnet, wherein the valve body and the supporting plate are assembled into a whole through interference, the bracket and the supporting plate are assembled into a whole through a gap, the valve body and the screw rod are assembled into a whole through interference, the valve body and the magnet seat assembly are in clearance fit and can slide relatively, the piston and the pressing block are in interference fit, the piston and the magnet seat assembly are in clearance fit and can slide relatively, the piston spring is positioned in the piston, the valve body, the magnet seat assembly, the piston, the leather cup and the sealing ring are connected into a sealing cavity, and the magnet seat assembly are fixedly connected;
when the booster works normally, the brake pedal is stepped on to drive the magnet seat assembly to move to form displacement difference, the motor is started to drive the screw rod and the valve body to follow, and the pressing block can prop the feedback disc to form the booster because of the hydraulic pressure in the sealing cavity and the support of the piston spring;
when the booster needs braking energy recovery, the torque output of the motor is reduced, the following performance of the screw and the valve body is poor, at the moment, the pedal input force is only larger than the hydraulic supporting force of the sealing cavity, the magnet seat assembly is moved for a certain distance, the sealing of the hydraulic sealing cavity is released, namely the hydraulic supporting is eliminated, the magnet seat assembly and the valve body move relatively, and at the moment, the piston spring provides a brake pedal feel for a driver;
when the motor of the booster fails, after the pedal input force moves the magnet seat assembly for a certain distance, the magnet seat assembly is rigidly connected with the bracket, and at the moment, the pedal input force is transmitted to the brake master cylinder through the bracket, so that braking is brought.
2. A mechano-hydraulic component of a mechano-hydraulically decoupled electric brake booster as defined in claim 1, wherein: the support is made of plastic materials with high toughness.
3. A mechano-hydraulic component of a mechano-hydraulically decoupled electric brake booster as defined in claim 1, wherein: the supporting plate is made of metal materials.
4. A mechano-hydraulic component of a mechano-hydraulically decoupled electric brake booster as defined in claim 1, wherein: the screw thread of the screw rod is a non-self-locking screw thread.
5. A mechano-hydraulic component of a mechano-hydraulically decoupled electric brake booster as defined in claim 1, wherein: when the leather cup is sealed with the oil passing hole of the magnet seat assembly, a hydraulic support is formed.
6. A mechano-hydraulic component of a mechano-hydraulically decoupled electric brake booster as defined in claim 1, wherein: when the leather cup and the magnet seat component pass through the oil hole to circulate, the hydraulic support fails.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111407833.6A CN113997917B (en) | 2021-11-24 | 2021-11-24 | Mechanical hydraulic component of electronic brake booster capable of being mechanically and hydraulically decoupled |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111407833.6A CN113997917B (en) | 2021-11-24 | 2021-11-24 | Mechanical hydraulic component of electronic brake booster capable of being mechanically and hydraulically decoupled |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113997917A CN113997917A (en) | 2022-02-01 |
| CN113997917B true CN113997917B (en) | 2023-12-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111407833.6A Active CN113997917B (en) | 2021-11-24 | 2021-11-24 | Mechanical hydraulic component of electronic brake booster capable of being mechanically and hydraulically decoupled |
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| Country | Link |
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| CN (1) | CN113997917B (en) |
Citations (7)
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| JP2007160992A (en) * | 2005-12-12 | 2007-06-28 | Isao Matsuno | Vehicular brake device |
| JP2012210831A (en) * | 2011-03-30 | 2012-11-01 | Honda Motor Co Ltd | Hydraulic pressure generation device for vehicle |
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| CN104129382A (en) * | 2014-08-24 | 2014-11-05 | 吉林东光奥威汽车制动系统有限公司 | Vacuum booster capable of simulating pedal travel |
| CN106427967A (en) * | 2016-11-25 | 2017-02-22 | 清华大学 | A fully mechanically decoupled brake-by-wire system for automobiles |
| CN109624957A (en) * | 2019-02-26 | 2019-04-16 | 吉林大学 | A kind of integrated electric energy assisted braking system with novel coupled modes |
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| DE102006040424A1 (en) * | 2006-08-29 | 2008-03-06 | Continental Teves Ag & Co. Ohg | Braking system for motor vehicles |
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| KR102372396B1 (en) * | 2017-08-30 | 2022-03-08 | 현대모비스 주식회사 | Brake apparatus for vehicle |
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2021
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| JP2007160992A (en) * | 2005-12-12 | 2007-06-28 | Isao Matsuno | Vehicular brake device |
| JP2012210831A (en) * | 2011-03-30 | 2012-11-01 | Honda Motor Co Ltd | Hydraulic pressure generation device for vehicle |
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| CN104129382A (en) * | 2014-08-24 | 2014-11-05 | 吉林东光奥威汽车制动系统有限公司 | Vacuum booster capable of simulating pedal travel |
| CN106427967A (en) * | 2016-11-25 | 2017-02-22 | 清华大学 | A fully mechanically decoupled brake-by-wire system for automobiles |
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| CN113997917A (en) | 2022-02-01 |
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