WO2014071876A1 - 助力器及制动系统 - Google Patents
助力器及制动系统 Download PDFInfo
- Publication number
- WO2014071876A1 WO2014071876A1 PCT/CN2013/086822 CN2013086822W WO2014071876A1 WO 2014071876 A1 WO2014071876 A1 WO 2014071876A1 CN 2013086822 W CN2013086822 W CN 2013086822W WO 2014071876 A1 WO2014071876 A1 WO 2014071876A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- valve body
- booster
- nut
- input
- elastic member
- Prior art date
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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
- 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
- B60T13/02—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 mechanical assistance or drive
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H25/22—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
- F16H25/2204—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls
Definitions
- the present invention relates to a device for providing assistance, and more particularly to a booster and a brake system.
- the operation of the vehicle often requires a power assisting device.
- the vehicle controls the related device of the vehicle by means of a booster such as compressed air or high-pressure oil to achieve the purpose of lightness.
- a booster such as compressed air or high-pressure oil
- the development of modern automotive brakes originated from the original mechanical control device. The most primitive brake control was only the driver's manipulation of a simple set of mechanical devices to apply force to the brakes. At that time, the car was lighter in weight, lower in speed, and mechanically braked. It has been able to meet the needs of automotive braking, but as the weight of the car itself increases, the power-assisting device becomes more and more important for the brake.
- the Chinese Patent Application Publication No. CN102205838A published on Oct. 5, 2011, discloses an electric-powered brake device for a vehicle, which includes a pedal, an input force pusher connected to the pedal, and a boost connected to the input force pusher.
- an output force push rod connected to the booster, a master cylinder connected to the output force push rod, the booster comprising a rack connected between the input force push rod and the output force push rod, and a gear meshing with the rack a DC motor connected to the gear through the transmission shaft, a speed reducer assembly, an electronic control unit ECU, and a speed sensor connected to the input force push rod, the speed sensor being connected to the electronic control unit ECU, the electronic control unit ECU and The DC motor is connected to the reducer assembly.
- Cik Patent Application Publication No. CN1872599A discloses a brake boosting system including a pedal pusher, a rubber reaction disk, a master cylinder pusher, a brake pedal and a housing, and The system further includes a motor, a worm and a worm gear, and the rotational driving force of the motor is converted into a linear driving force by the worm and the worm gear.
- the automobile electric assist brake device disclosed in the Chinese Patent Application Publication No. CN102205838A, or the brake assist system disclosed in the Chinese Patent Application Publication No. CN1872599A has poor transmission efficiency and high transmission noise.
- the main technical problem to be solved by the present invention is to improve the transmission efficiency of the booster.
- the present invention provides a booster, which includes:
- a power assisting assembly comprising a ball screw, the ball screw comprising a screw, a nut and a plurality of balls fitted between the screw and the nut, the nut being interlocked with the valve body, the nut moving linearly on the screw to which it is fitted Thereby driving the valve The body moves in a straight line.
- the power assisting assembly includes at least two pairs of ball screws and a transmission
- the transmission device includes an input shaft
- the input shaft is coupled with the screw
- the The rotational power of the input shaft is transmitted to each of the screws.
- the boosting assembly further includes a booster disk, the nut being non-rotatably mounted to the booster disk, the boosting component driving the valve through the booster disk body.
- the booster further includes a housing, and the valve body is linearly movable in a longitudinal direction between the first position and the second position with respect to the housing;
- the nut moves linearly along the forward stroke on the mating screw thereof, so that the boosting assembly drives the valve body to linearly move toward the first position, at the input
- the shaft rotates in the reverse direction
- the nut linearly moves along the retracting stroke on the mating screw thereof, so that the assisting assembly drives the valve body to linearly move toward the second position.
- the booster further includes an input member, an actuator, an electronic control unit, and a stroke sensor, and the input member can drive the assisting component without the assisting component
- the actuator can output rotational power to the input shaft
- the stroke sensor detects displacement of the input member
- the electronic control unit detects the stroke sensor according to the stroke sensor The displacement of the input member to the control controls the operation of the actuator.
- the power assisting disk is provided with a center hole, the valve body passes through the center hole, the valve body is provided with a boosting table, and the nut passes through the power assisting disk The valve body is driven against the booster table.
- the booster further includes a first elastic member, and the first elastic member is elastically deformed to store potential energy when the valve body moves toward the first position.
- the first elastic member drives the valve body to move toward the second position when the first elastic member releases the potential energy.
- the input member is reciprocable relative to the valve body between a rest position and a driving position, and a second is disposed between the input member and the valve body
- An elastic member that is held in the rest position by an elastic force of the second elastic member without an external force, and the second elasticity during an external force driving the input member to move toward the driving position
- the component is elastically deformed to store potential energy, and the input member drives the valve body to move under the further action of the external force when the input member reaches the driving position, and when the second elastic member releases the potential energy, the second An elastic member drives the input member to move toward the rest position.
- the booster further includes an actuator connected to the input shaft, the actuator being a motor capable of outputting forward and reverse rotational power, The screws of at least two of the ball screws are arranged symmetrically with respect to the valve body.
- the transmission is a gear transmission having a plastic gear mounted to a steel shaft.
- the stroke sensor is a magnet medium sensor.
- a connecting mechanism is disposed between the valve body and the nut, the connecting mechanism is partially fixed to the nut, and the other portion is connected to the valve body.
- the present invention also provides a brake system including the aforementioned booster and hydraulic system, the hydraulic system including a brake master cylinder having a piston, the valve body being coupled to the piston.
- an inverse action made of an elastic material is mounted between the valve body and the piston.
- the booster of the present invention has high transmission efficiency, and has a reasonable structural design, a small volume, and low cost.
- FIG. 1 shows a schematic view of a booster according to an embodiment of the present invention, in which the housing inside the booster is conveniently displayed, and the housing of the booster is not shown;
- FIG. 2 is a schematic structural view of the booster taken along line A-A of FIG. 1, wherein the booster is in a resting state;
- FIG. 3 is a schematic structural view of the booster taken along line BB of FIG.
- FIG. 4 is a partially enlarged schematic structural view of a valve body according to an embodiment of the present invention, which is shown from a perspective similar to that shown in FIG. 3;
- FIG. 5 is a structural schematic view showing a state in which the booster shown in FIG. 2 applies a pedal force and the booster activates the assist function;
- FIG. 6 shows that the booster shown in FIG. 2 reaches a maximum brake when a pedal force is applied and the booster activates the assist function. Schematic diagram of the state of assist;
- Fig. 7 is a schematic view showing the structure of the booster shown in Fig. 2 when the boosting function is disabled and the pedaling force is applied for braking. detailed description
- the present invention provides a brake system including a booster 100 and a hydraulic system as shown in Figs. 1 to 7, the hydraulic system including a brake master cylinder 11 having a piston 12.
- a brake system including a booster 100 and a hydraulic system as shown in Figs. 1 to 7, the hydraulic system including a brake master cylinder 11 having a piston 12.
- Specific embodiments of the booster 100 provided by the present invention will be described in detail below.
- the booster 100 is fixed by a fixing bolt 9.
- the booster 100 includes a valve body 2 and a power assisting assembly.
- the valve body 2 is coupled to the piston 12 of the brake master cylinder 11.
- the power assisting assembly includes a ball screw and an input shaft 60.
- the ball screw includes a screw 40, a nut 41 and a screw 40.
- a plurality of balls (not shown) with the nut 41, the screw 40 is interlocked with the input shaft 60 so that when the input shaft 60 rotates, the screw 40 is driven to rotate by the power transmitted from the input shaft 60 and the nut 41 is engaged with the screw
- the upper 40 moves in a straight line, so that the assisting assembly drives the valve body 2 to move in a straight line.
- the booster 100 of the present invention has a high transmission efficiency.
- the booster 100 further includes a housing 1 in which the valve body 2 is linearly movable in a longitudinal direction between the first position and the second position; when the input shaft 60 is rotated in the forward direction, the nut 41 is in the same The mating screw 40 linearly moves along the forward stroke so that the assisting assembly drives the valve body 2 to linearly move toward the first position.
- the nut 41 moves linearly along the retracting stroke on the mating screw 40 to assist the force.
- the assembly drives the valve body 2 to move linearly to the second position.
- the housing 1 is provided with a receiving space 10, and the valve body 2 includes a first end 21 and a second end 22 opposite to the first end 21, the first end 21 is received in the receiving space 10, and the second end 22 is protruded in the receiving space 10 Bu.
- a valve body guide 19 is mounted on the housing 1, and the valve body 2 is mounted in the valve body guide 19 so that the valve body 2 can be moved longitudinally under the guidance of the valve body guide 19.
- the casing 1 is also provided with a shroud 13 which is substantially flared and has a corrugated structure which is telescopically deformable, and the large opening of the shroud 13 is combined with the casing 1.
- the second end 22 of the valve body 2 projecting outside the receiving space 10 extends from the bottom end of the shroud 13 into the shroud 13.
- the first counterbore 23 is disposed at the end of the first end 21 of the valve body 2, and the second counterbore 24 is disposed at the center of the bottom of the first counterbore 23.
- the diameter of the hole 24 is smaller than the diameter of the first counterbore 23, so that a step is formed between the first counterbore 23 and the second counterbore 24.
- An input counterbore 25 is provided at the end of the second end 22 of the valve body 2.
- a jack hole 27 is provided, and the jack hole 27 communicates with the second counterbore 24 and the input counterbore 25.
- the power assisting assembly includes two pairs of ball screws as an example.
- the two screws 40 of the two ball screws are mounted in parallel inside the housing space 10 of the housing 1, at each When the screw 4 rotates in the forward direction, the nut 41 linearly moves along the forward stroke on the mating screw 4 thereof, and the assisting assembly drives the valve body 2 to linearly move to the first position during the forward stroke of the nut 41; When rotated, the nut 41 moves linearly along the retracting stroke on its mating screw 4.
- the power assist assembly includes a transmission 6 that includes an input shaft 60 and transmits rotational power of the input shaft 60 to each of the screws 40.
- the transmission device 6 further includes at least two output wheels 61, 62, and may include a plurality of intermediate gears (not numbered) according to the needs of the transmission, and the transmission 6 converts the rotational power of the input shaft 60 to the rotational power of the two output wheels 61, 62, each of the output wheels 61, 62.
- a screw 40 is non-rotatably coupled to transmit the rotational power of the input shaft 60 to each of the screws 40.
- the transmission 6 is a gear transmission having a plastic gear mounted to the steel shaft.
- the transmission 6 is described as a gear transmission in a particular embodiment in accordance with the present invention, those skilled in the art will appreciate that the invention is not limited to this form, for example, it may be a sprocket drive , pulley drive or a combination of multiple drive forms.
- the nut 41 is not rotated and is pushed by the rotating screw 40, and the nut 41 transmits the assist force to the valve body 2 through the booster disk 42.
- the stroke sensor 81 will notify the electronic control unit 8 to control the motor reversal as the actuator 7 due to the movement of the plunger 32, and as will be described in detail below, the first elastic member 51 will push back the valve Body 2 retreats.
- booster 100 of the present embodiment includes two pairs of ball screws, those skilled in the art will appreciate that the booster 100 of the present invention is not limited to two pairs of ball screws, and may also include three ball screws, or more A secondary ball screw, these are all within the scope of the present invention.
- Each of the ball screws includes a screw 40, a nut 41, and a plurality of balls fitted between the screw 40 and the nut 41.
- the screws 40 of at least two of the ball screws are arranged symmetrically with respect to the valve body 2. Thereby, the power assisting assembly is balanced to apply force to the valve body 2.
- the power assisting assembly further includes a power assisting disk 42 that is longitudinally movable relative to the valve body 2 but is not rotatable relative to each other. Both nuts 41 are non-rotatably mounted to the power assisting disk 42 and the power assisting assembly drives the valve through the power assisting disk 42.
- the booster disk 42 is provided with a center hole through which the valve body 2 passes, and the valve body 2 is provided with a booster table 20 which is disposed adjacent to the first end 21 of the valve body 2.
- the assist disk 42 drives the valve body 2 against the booster table 20 during the forward stroke of the nut 41.
- the booster 100 further includes a first elastic member 51.
- the first elastic member 51 is a coil spring, and the first elastic member 51 is mounted between the housing 1 and the push rod holder 15 fixed to the valve body 2, and the first elastic member 51 is preliminarily compression.
- the first elastic member 51 can also be made of other materials, and the first elastic member 51 can be mounted in other manners.
- the first elastic member 51 may be a laminated spring; the first elastic member 51 may be mounted in such a manner as to be directly mounted between the master cylinder 11 and the valve body 2 fixed relative to the housing 1.
- the installation method only needs to give up the position of the casing 1 (for example, the hole occupied by the first elastic member 51 on the casing 1), and the first elastic member 51 can be in contact with the brake.
- the front mounting method is pre-compression-deformed, and those skilled in the art know that the first elastic member 51 can also be stretch-deformed.
- Various changes or modifications of the first elastic member 51 are within the scope of the present invention, and it is only required that the elastic force of the first elastic member 51 can directly or indirectly act on the valve body 2. Therefore, when the valve body 2 is oriented When the first position is moved, the first elastic member 51 is elastically deformed to store the potential energy, and when the first elastic member 51 releases the potential energy, the first elastic member 51 drives the valve body 2 to move toward the second position.
- the booster 100 further includes an input member 3, an actuator 7, an electronic control unit 8, and a stroke sensor 81, and the input member 3 can drive the valve body 2 to linearly move to the first position without the assistance of the assisting assembly.
- the actuator 7 is connected to the input shaft 60 so as to be able to output rotational power to the input shaft 60
- the stroke sensor 81 detects the displacement of the input member 3
- the electronic control unit 8 controls the actuator based on the displacement of the input member 3 detected by the stroke sensor 81. 7 work.
- the input member 3 is reciprocable relative to the valve body 2 between a rest position and a drive position.
- the input unit 3 includes a pedal (not shown) that accepts a driver's operation request, an input rod 31 connected to the pedal, and a plunger 32 connected to the input rod 31.
- the input member 3 is at least partially mounted in the input counterbore 25.
- the plunger 32 is mounted in the input counterbore 25, and at least a portion of the input rod 31 is also mounted in the input counterbore 25.
- the elastic member holder is mounted in the opening at the longitudinal end of the input counterbore 25. A part of the input rod 31 passes through the through hole in the middle of the elastic member holder 53 and the through hole at the top end of the shield 13 to connect the pedal.
- the actuator 7 is a motor capable of outputting forward and reverse rotational power. It is clear to those skilled in the art that switching the direction of operation of the motor through the circuit to output forward and reverse rotational power is generally easier to achieve than mechanical commutation. Moreover, since the mechanical reversing device usually requires a certain volume, the use of the motor that can output the forward and reverse rotational power of the actuator 7 also helps to reduce the overall volume of the booster 100.
- the travel sensor 81 is a magnet media sensor.
- the radial through valve body 2 is provided with a guide groove 28, and the guide groove 28 has a long groove shape extending longitudinally.
- the key 814 fixed to the plunger 32 radially protrudes from both sides of the plunger 32, and the extended key 814 is opposite to the two.
- the side guide grooves 28 are reciprocally movable longitudinally along the guide grooves 28.
- a magnet holder 812 is externally mounted to the valve body 2, and a magnet 810 is mounted in the magnet holder 812. In the embodiment shown in Figure 3, two magnets 810 are mounted in the magnet holder 812.
- the magnet holder 812 is movably mounted in a groove (not numbered) outside the valve body 2 and is longitudinally reciprocable under the guidance of the groove.
- One end of the key 814 is fixed to the magnet holder 812 through the guide groove 28 on one side, and therefore, the magnet holder 812 can move in accordance with the movement of the plunger 32.
- the stroke sensor 81 is mounted on the outside of the magnet 810. When the magnet holder 812 and the two magnets 810 mounted therein move with the plunger 32, the stroke sensor 81 senses a change in the magnetic field to detect the stroke. It should be noted that, in the embodiment shown in FIG.
- the magnet holder 812 and the two magnets 810 installed therein are located inside the casing 1, that is, the magnet holder 812 and the two magnets installed therein 810 is located between the housing 1 and the valve body 2, and the stroke sensor 81 is disposed outside the housing 1.
- the input member 3 is reciprocable relative to the valve body 2 between a rest position and a drive position.
- the plunger 32 is correspondingly longitudinally in the input counterbore 25 Reciprocating motion.
- a second elastic member 52 is disposed between the input member 3 and the valve body 2, and specifically, the second elastic member 52 is disposed in the input counterbore 25 of the valve body 2.
- the second elastic member 52 is mounted on the elastic member holder 53 in the input counterbore 25, and the other end is mounted on the input rod 31 of the input member 3, and the second elastic member 52 has a certain pre-compression. the amount.
- the input member 3 longitudinally drives the valve body 2 to linearly move toward the first position under the further action of the external force. If the driver releases the pedal, the pedal no longer transmits an external force, and the second elastic member 52 compressed to store the elastic potential energy will elongate in the direction of recovery to release the potential energy. When the second elastic member 52 releases the potential energy, the second elastic member 52 drives the input member 3 to move to the rest position.
- the master cylinder 11 has a piston 12 that connects the push rod 14 of the booster 100, and the push rod 14 is fixed to the first end 21 of the valve body 2 by the push rod holder 15. .
- a reaction disk 16 made of an elastic material is installed between the valve body 2 and the piston 12, and specifically, a reaction disk is mounted on the bottom of the first counterbore 23 of the valve body 2. 16.
- the end of the push rod 14 has an enlarged portion that is mounted outside the reaction disk 16 mounted in the first counterbore 23.
- a through hole is formed in the middle of the push rod holder 15, and the push rod 14 is connected to the piston 12 through the through hole in the middle of the push rod holder 15, but the enlarged portion of the end portion of the push rod 14 is fixed to the first by the push rod holder 15.
- a plunger disk 17 is mounted in the second counterbore 24 of the valve body 2, since the second counterbore 24 communicates with the jack hole 27 and communicates with the first counterbore 23 through the bottom middle portion of the first counterbore 23, thus the jack
- the movable ram 18 in the bore 27 can contact the plunger disk 17, and the plunger disk 17 can contact the reaction disk 16 mounted at the bottom of the first counterbore 23.
- the transmission 6 is used to provide a transmission from a rotary motion to a rotary motion, and a well-developed gear transmission can be employed, which is easy to manufacture and has high transmission efficiency. .
- the rotary motion is finally converted into a linear motion by the ball screw.
- the ball screw can provide a large amplification ratio for the power, so that the input torque is small, and the lateral force of the gear to the bearing 63 is small, which is advantageous for reducing the specification of the bearing 63. Since the ball 40 is fitted between the screw 40 of the ball screw and the nut 41, rolling friction is caused between the components during operation, and the transmission loss of the ball screw is small.
- the ball screw is a mature technology that has been developed for many years.
- the industry has a precise manufacturing process.
- the ball screw has a small backlash and high positioning accuracy. Therefore, the ball screw can provide a high efficiency and high positioning accuracy of the rotary motion to the linear motion change. Therefore, as a whole, according to the technical solution of the present invention, the transmission efficiency is high, the transmission torque is small, the positioning accuracy is high, and the manufacturing is easy, and the quality can be provided. Quantity protection.
- the technical solution according to the present invention can employ components such as the actuator 7 of a smaller specification than the conventional technical solution, thereby reducing the cost and reducing the volume of the booster 100, as compared with the case of providing the same assisting force; Plastic gears, thereby reducing cost and weight, and reducing the inertia of the rotating transmission components.
- a gear transmission can have a plastic gear mounted to a steel shaft with good overall performance.
- the booster 100 can operate in both the assist drive mode and the manual drive mode.
- the control elements such as the actuator 7 and the electronic control unit 8 are normally operated
- the input rod 31 transmits an external force to the plunger 32, and the plunger 32 pushes again.
- the jack 18 is simultaneously driven by the key 814 to move the magnet holder 812.
- the stroke sensor 81 senses a change in the magnetic field to detect the stroke.
- the electronic control unit 8 collects the signal detected by the stroke sensor 81 to determine the braking demand, thereby commanding the forward rotation of the motor as the actuator 7 to output the positive rotational power, and the power is input through the input shaft 60 as the transmission device 6.
- FIG. 6 shows a schematic diagram of the booster 100 according to the assist driving mode
- FIG. 7 shows a schematic diagram of the booster 100 reaching the maximum assisting force according to the assist driving mode. It should be additionally noted that when the jack 18 is moved forward by the plunger 32, the jack 18 pushes the plunger disc 17, and there is usually a gap between the reaction disc 16 and the plunger disc 17, and the jack 18 pushes the plunger.
- the reaction disk 16 is usually rubber or a similar elastic material, and the reaction disk 16 of the material has a liquid-like transfer pressure when subjected to pressure.
- the assist force is larger, the peripheral annular region of the reaction disk 16 is subjected to pressure.
- the pressure is simultaneously transmitted to the central portion of the reaction disk 16, so that the driver can feel the pressure becoming large, so that good pedaling feedback can be obtained. Therefore, the booster 100 can provide a good driving experience.
- the pedal thrust is transmitted to the reaction disk 16 through the jack 18 and the plunger disk 17, and the assist of the actuator 7 also acts on the reaction disk 16 through the valve body 2.
- the resultant force of these two forces acts on the output push rod 14 through the reaction disk 16.
- the second elastic member 52 releases the elastic potential energy to push the input rod 31, and the input rod 31 is in the second elasticity.
- the elastic force of the member 52 is restored to the rest position.
- the plunger 32 is also restored to the rest position, and the magnet holder 812 is driven by the button 814.
- the stroke sensor 81 senses the change of the magnetic field, thereby detecting the change of the stroke, and the electronic control unit 8 collects the stroke sensor 81 to detect the change.
- the signal determines that the braking demand is canceled, thereby commanding the reverse operation of the motor as the actuator 7 to output the reverse rotational power, thereby driving the assisting assembly to retreat, while the first elastic member 51 releases the elastic potential energy to push the valve body 2,
- the valve body 2 is restored to the second position by the elastic force of the first elastic member 51.
- a rotation angle sensor (not shown) is disposed in the actuator 7, and the position of the valve body 2 can be known by converting the data detected by the rotation angle sensor according to the transmission ratio of the transmission device 6 in the assist state. .
- the electronic control unit 8 can control the relative positions of the valve body 2 and the plunger 32.
- the valve body 2 and the plunger 32 have no longitudinal interaction force.
- the plunger 32 abuts against the valve body 2; if an external force is transmitted from the pedal, the input member 3 is further in the external force
- the driving valve body 2 is linearly moved to the first position; the valve body 2 pushes the push rod 14 and the piston 12 connected to the push rod 14 to move, and the spring as the first elastic member 51 is compressed and stored. Elastic potential energy. If the driver releases the pedal, the pedal no longer transmits an external force, and the first elastic member 51 compressed and stored with the elastic potential energy releases the elastic potential energy to push the valve body 2, and the elastic force of the valve body 2 at the first elastic member 51 is pushed. Recovering to the second position; the second elastic member 52, which is finally compressed to store the elastic potential energy, will also elongate to release the potential energy. When the second elastic member 52 releases the potential energy, the second elastic member 52 drives the input member 3 to Rest position exercise.
- the nut 41 and the valve body 2 are not limited to being coupled by a booster disk 42, and the nut 41 can be interlocked with the valve body 2 in various other forms.
- a connection mechanism (not shown) may be provided between the valve body 2 and the nut 41.
- the connection mechanism is partially fixed to the nut 41, and the other portion is connected to the valve body 2.
- the connecting mechanism may be a rail mechanism connected between the nut 41 and the valve body 2, the rail mechanism restricting the nut 41 from rotating relative to the valve body 2 but allowing the nut 41 and the valve body 2 to travel within a certain stroke. Relatively sliding in the axial direction.
- the booster 100 of the present invention Compared with the prior art power assisting device, the booster 100 of the present invention has high transmission efficiency, and is structurally reasonable, small in size, and low in cost.
- the plunger The 32 and the jack 18 can be integrally formed as one piece, and other displacement sensors (e.g., angular displacement sensors mounted to the pedals, etc.) can be used to obtain displacement of the input member 3. Therefore, all equivalent technical solutions are also within the scope of the invention, and the scope of the invention should be defined by the claims.
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Braking Systems And Boosters (AREA)
- Transmission Devices (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP13852956.5A EP2918462B1 (en) | 2012-11-12 | 2013-11-11 | Power assist device and brake system |
JP2015541006A JP6145172B2 (ja) | 2012-11-12 | 2013-11-11 | ブースタ及びブレーキシステム |
US14/442,214 US9701296B2 (en) | 2012-11-12 | 2013-11-11 | Power assist device and brake system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201210449372.3A CN103802813B (zh) | 2012-11-12 | 2012-11-12 | 助力器及制动系统 |
CN201210449372.3 | 2012-11-12 |
Publications (1)
Publication Number | Publication Date |
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WO2014071876A1 true WO2014071876A1 (zh) | 2014-05-15 |
Family
ID=50684073
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2013/086822 WO2014071876A1 (zh) | 2012-11-12 | 2013-11-11 | 助力器及制动系统 |
Country Status (5)
Country | Link |
---|---|
US (1) | US9701296B2 (zh) |
EP (1) | EP2918462B1 (zh) |
JP (1) | JP6145172B2 (zh) |
CN (1) | CN103802813B (zh) |
WO (1) | WO2014071876A1 (zh) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN108799217A (zh) * | 2018-08-03 | 2018-11-13 | 广州番禺职业技术学院 | 一种增压器 |
US20190009765A1 (en) * | 2015-12-22 | 2019-01-10 | Robert Bosch Gmbh | Electromechanical brake booster and braking system |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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Also Published As
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CN103802813A (zh) | 2014-05-21 |
JP6145172B2 (ja) | 2017-06-07 |
EP2918462B1 (en) | 2018-05-16 |
US9701296B2 (en) | 2017-07-11 |
CN103802813B (zh) | 2018-11-06 |
EP2918462A4 (en) | 2016-04-20 |
EP2918462A1 (en) | 2015-09-16 |
JP2015533725A (ja) | 2015-11-26 |
US20160280196A1 (en) | 2016-09-29 |
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