CN110541898A - Electronic mechanical hydraulic line control brake - Google Patents
Electronic mechanical hydraulic line control brake Download PDFInfo
- Publication number
- CN110541898A CN110541898A CN201910800232.8A CN201910800232A CN110541898A CN 110541898 A CN110541898 A CN 110541898A CN 201910800232 A CN201910800232 A CN 201910800232A CN 110541898 A CN110541898 A CN 110541898A
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- brake
- rack
- piston
- curved surface
- gear
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Classifications
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
- F16D55/02—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
- F16D55/22—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads
- F16D55/224—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members
- F16D55/225—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads
- F16D55/226—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads in which the common actuating member is moved axially, e.g. floating caliper disc brakes
- F16D55/2265—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads in which the common actuating member is moved axially, e.g. floating caliper disc brakes the axial movement being guided by one or more pins engaging bores in the brake support or the brake housing
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
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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
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/30—Constructional features of the final output mechanisms
- F16H63/34—Locking or disabling mechanisms
- F16H63/3416—Parking lock mechanisms or brakes in the transmission
- F16H63/345—Parking lock mechanisms or brakes in the transmission using friction brakes, e.g. a band brakes
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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
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/30—Constructional features of the final output mechanisms
- F16H63/34—Locking or disabling mechanisms
- F16H63/3416—Parking lock mechanisms or brakes in the transmission
- F16H63/3458—Parking lock mechanisms or brakes in the transmission with electric actuating means, e.g. shift by wire
- F16H63/3466—Parking lock mechanisms or brakes in the transmission with electric actuating means, e.g. shift by wire using electric motors
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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
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/30—Constructional features of the final output mechanisms
- F16H63/34—Locking or disabling mechanisms
- F16H63/3416—Parking lock mechanisms or brakes in the transmission
- F16H63/3458—Parking lock mechanisms or brakes in the transmission with electric actuating means, e.g. shift by wire
- F16H63/3475—Parking lock mechanisms or brakes in the transmission with electric actuating means, e.g. shift by wire using solenoids
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2121/00—Type of actuator operation force
- F16D2121/02—Fluid pressure
- F16D2121/04—Fluid pressure acting on a piston-type actuator, e.g. for liquid pressure
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2121/00—Type of actuator operation force
- F16D2121/18—Electric or magnetic
- F16D2121/24—Electric or magnetic using motors
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2123/00—Multiple operation forces
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2125/00—Components of actuators
- F16D2125/02—Fluid-pressure mechanisms
- F16D2125/06—Pistons
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2125/00—Components of actuators
- F16D2125/02—Fluid-pressure mechanisms
- F16D2125/08—Seals, e.g. piston seals
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2125/00—Components of actuators
- F16D2125/02—Fluid-pressure mechanisms
- F16D2125/16—Devices for bleeding or filling
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2125/00—Components of actuators
- F16D2125/18—Mechanical mechanisms
- F16D2125/20—Mechanical mechanisms converting rotation to linear movement or vice versa
- F16D2125/22—Mechanical mechanisms converting rotation to linear movement or vice versa acting transversely to the axis of rotation
- F16D2125/24—Rack-and-pinion
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2125/00—Components of actuators
- F16D2125/18—Mechanical mechanisms
- F16D2125/44—Mechanical mechanisms transmitting rotation
- F16D2125/46—Rotating members in mutual engagement
- F16D2125/52—Rotating members in mutual engagement with non-parallel stationary axes, e.g. worm or bevel gears
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2127/00—Auxiliary mechanisms
- F16D2127/06—Locking mechanisms, e.g. acting on actuators, on release mechanisms or on force transmission mechanisms
Abstract
The invention relates to an electronic mechanical hydraulic line control brake, which comprises a motor, a transmission mechanism, a gear, a rack, a piston, a hydraulic system and the like. The motor drives the gear to rotate through the transmission mechanism, the piston and the brake caliper body are respectively driven to move in opposite directions through the gear rack mechanism and the hydraulic system, the friction plates are pressed tightly from two sides of the brake disc with the same force, and meanwhile, the influences possibly caused by the failure of the hydraulic system and the long-time continuous braking work are avoided. The invention has simple structure, reliable work and high braking efficiency, can automatically adjust the braking clearance, compensate the influence caused by the abrasion of the friction plate, simplify the design of a control system and can be used for service braking and parking braking.
Description
Technical Field
the invention relates to the field of brakes, in particular to a brake-by-wire brake which can replace the existing floating caliper disc type hydraulic brake, realize that friction plates clamp a brake disc from two sides with the same pressure in an electric control mechanical hydraulic mode, and realize adjustable brake clearance and adjustable brake strength, and particularly relates to an electronic mechanical hydraulic brake-by-wire brake.
Background
The brake-by-wire technology is a novel brake technology appearing in recent years, a control system receives information of a sensor to control a motor to work without depending on mechanical or hydraulic connection between a brake and a brake pedal, and stable and reliable brake control of an automobile is realized. At present, there are two main types of electronic hydraulic brake systems (EHB) and electronic mechanical brake systems (EMB). The brake-by-wire system is beneficial to optimizing the braking performance of the whole vehicle, and can be conveniently integrated with other electronic control systems such as ABS, ASR, ESP and the like, so that the system has wide development space.
The electronic hydraulic brake system (EHB) is formed by transforming the traditional hydraulic brake system, the braking process is quicker and more stable, the braking safety and the comfort of an automobile are improved, but the hydraulic part is kept, and the characteristics of hydraulic oil pressure establishment, pressure oil flow energy transfer and the like still exist, so the electronic hydraulic brake system does not have all the advantages of a complete wire control brake system, and is generally regarded as an advanced product of an electronic mechanical brake system (EMB).
An electronic mechanical brake system (EMB) drives a mechanical mechanism through a motor to realize a braking process, so that the structure of the brake system is greatly simplified, and the brake is easier to arrange, assemble and overhaul. However, the conventional electromechanical braking system often lacks a function of automatically adjusting the braking clearance at the brake part, so that the problem that the efficiency of a brake actuator is variable under the conditions of external environment change and friction plate abrasion of the brake is caused, and certain difficulty is brought to the control of the braking efficiency. Meanwhile, when the mechanical transmission part needs to realize a larger transmission ratio, the mechanical transmission part often has the conditions of larger size, higher space requirement and the like, so that most of brakes have the problems of more complex structure, larger installation size and the like.
Disclosure of Invention
The invention aims to provide an electromechanical hydraulic brake-by-wire. The invention has the advantages of simple structure, reliable work and the like, can realize the automatic adjustment of the brake clearance, utilizes the advantages of small space, large transmission ratio and the like of the hydraulic system by the matching of the hydraulic system and the mechanical system, simultaneously avoids the phenomena of sensitivity reduction and the like caused by the problems of the flow of hydraulic oil, pressure establishment and the like in the hydraulic system, and also carries out structural design aiming at the conditions of failure of the hydraulic system, long-time continuous braking and the like.
The technical scheme for realizing the purpose of the invention is as follows:
the electro-mechanical hydraulic line control brake comprises a motor, a transmission mechanism, a gear, a rack, a piston, a large sealing ring, a liquid supplementing tank, a one-way valve, a pressure limiting valve, a throttling hole, a brake caliper body, a brake disc and a friction plate; the method is characterized in that: the friction plates are symmetrically arranged on two sides of the brake disc, one friction plate is arranged on the piston, and the other friction plate is arranged on the brake caliper body; the motor is connected with a power input element of the transmission mechanism, and a power output element of the transmission mechanism is connected with the gear; the gear is meshed with the rack, and the rack is arranged on the brake caliper body and comprises a rack with a curved surface structure with a certain curvature at one end; the piston is arranged in an installation hole on the brake caliper body through the large sealing ring, one end of the piston is provided with the friction plate, and the other end of the piston is provided with a curved surface structure corresponding to the curved surface structure of the rack; a hydraulic cavity is arranged between the curved surface end of the piston and the curved surface end of the rack; the hydraulic cavity is connected with the liquid supplementing tank through the one-way valve; the hydraulic cavity is connected with the liquid supplementing tank through the pressure limiting valve, and the throttling hole is arranged between the pressure limiting valve and the hydraulic cavity.
The curved surface end of the piston is in direct contact with the curved surface end of the rack to form a contact curved surface, and the contact curved surface can be a slope, a circular arc surface, a hyperbolic surface, a parabolic surface and the like or a combination of the curved surfaces.
A gap is reserved between the piston and the mounting hole in the brake caliper body, the size of the gap is larger than the feedback of the deformation between the contact of the friction plate and the brake disc and the generation of the maximum braking efficiency on the contact curved surface of the piston and the rack in the braking work, and the size of the gap is smaller than the feedback of the free gap between the friction plate and the brake disc on the contact curved surface of the piston and the rack. When the piston and the rack curved surface end are contacted, the friction plate is contacted with the brake disc, and the friction force acts to produce relative movement on the curved surface between the piston and the rack, so that the self-energizing effect is realized, and when the maximum braking strength is reached, the piston is not contacted with the mounting hole. When the friction plate and the brake disc are contacted due to impurities or unevenness between the friction plate and the brake disc, relative movement can be generated on the contact curved surface, and the piston is contacted with the mounting hole before the free gap is completely eliminated, so that the self-boosting effect can not occur.
And a pressing mechanism is adopted between the rack and the brake caliper body to ensure the normal meshing of the gear and the rack and prevent the gear from being disengaged when the automobile bumps.
And a sealing device is arranged between the rack and the brake caliper body.
The brake caliper further comprises a rolling support on a support surface between the rack and the brake caliper body, so that friction resistance is reduced, and the working efficiency of the system is improved.
The piston is matched with the curved surface of the rack by adopting a roller mechanism to reduce the friction resistance.
When no transmission link with zero reverse efficiency exists in the transmission mechanism, parking braking under the condition of power failure of the motor is realized by adopting a locking mechanism, the locking mechanism adopts an electromagnetic brake or an electric control mechanical braking device and can be disconnected when being powered on, a transmission element in a transmission link is fixed when the power failure occurs, the pressure between the friction plate and the brake disc is kept, and the parking braking function is realized; when the transmission mechanism is provided with a transmission link with the reverse efficiency of zero, the parking brake can be realized by using the locking mechanism, and the parking brake under the condition of motor power failure can also be realized by using the transmission link with the reverse efficiency of zero and incapable reverse transmission of power and motion.
Drawings
Fig. 1 is a front view of a first embodiment of an electro-mechanical hydraulic brake-by-wire of the present invention.
Fig. 2 is a plan view of a second embodiment of the electromechanical hydraulic brake-by-wire of the present invention.
The description is marked in the drawings: 1-brake caliper support 2-guide pin 3-brake caliper body 4-rack (4A: lower rack, 4B: upper rack) 5-drive gear 6-fluid supplement tank 7-worm wheel 8-motor 9-motor shaft 10-electromagnetic brake 11-worm 12-large sealing ring 13-small sealing ring 14-sun gear 15-orifice 16-friction plate 17-brake disc 18-electromagnetic coil 19-return spring 20-locking pin 21-planetary gear 22-one-way valve 23-pressure limiting valve 24-gear ring 25-planet carrier 26-piston
Detailed Description
An embodiment of the present invention will be described in detail with reference to fig. 1.
As shown in fig. 1, an electromechanical hydraulic brake-by-wire brake comprises a caliper body (3) which can be moved on a guide pin (2), the guide pin (2) being fixed to a caliper support (1). A brake disc (17) is arranged in a jaw of the brake caliper body (3), friction plates (16) are arranged on two sides of the brake disc (17), one is arranged on the brake caliper body (3), the other is arranged on a piston (26), the piston (26) is arranged on the brake caliper body (3) through a large sealing ring (12), the other end of the piston (26) is provided with an inclined surface and is oppositely arranged with a lower rack (4A) which is also provided with the inclined surface, the lower rack (4A) is arranged on the brake caliper body (3) through a small sealing ring (13), the part of the lower rack (4A) which is meshed with the gear (5) is supported on the brake caliper body (3), an upper rack (4B) is arranged on the brake caliper body (3) corresponding to the lower rack (4A), a gear (5) is arranged between the lower rack (4A) and the upper rack (4B), the gear (5) is fixedly connected with a worm wheel (7) in a worm and worm gear transmission mechanism, and a worm (11) is fixedly arranged on a motor shaft (9, is driven by a motor (8). A hydraulic cavity is arranged between the piston (26) and the lower rack (4A), and the acting area of the lower rack (4A) on the hydraulic cavity is smaller than that of the piston (26) on the hydraulic cavity. The hydraulic cavity is connected with the liquid supplementing tank (6) through a one-way valve (22), meanwhile, the hydraulic cavity is connected with the liquid supplementing tank (6) through a pressure limiting valve (23), and an orifice (15) is arranged between the pressure limiting valve (23) and the hydraulic cavity.
When the brake works, the motor (8) drives the worm (11) to rotate, the worm wheel (7) is driven to rotate in a speed reduction mode, the gear (5) is driven to rotate clockwise, the upper rack (4B) moves rightwards, the lower rack (4A) moves leftwards, pressure in the hydraulic cavity is increased, the piston (26) and the brake caliper body (3) are pushed to move in opposite directions, the friction plates (16) are driven to press the brake disc (17) from two sides with the same force, and efficient and reliable brake effect is achieved. When the brake is released, the motor (8) drives the worm gear mechanism to rotate reversely, the gear (5) is driven to rotate reversely, the piston (26) and the brake caliper body (3) move relatively, and all elements recover to the initial positions.
When the friction plate (16) is abraded and the thickness is reduced, and the brake is in work, the motor (8) drives the gear (5) to rotate clockwise through the worm gear mechanism, the piston (26) and the brake caliper body (3) are pushed to move relatively through the hydraulic cavity, when the elastic deformation of the large sealing ring (12) reaches the maximum, the brake effect is poor due to abrasion of the friction plate (16), at the moment, the gear (5) is driven by the motor (8) to continue to rotate, namely, the rack and the brake caliper body (3) continue to move relatively, and the piston (26) continues to move relative to the large sealing ring (12) until the required brake strength is achieved. When braking is relieved, the motor (8) drives the worm gear mechanism to rotate reversely, the gear (5) rotates reversely, the rack and the brake caliper body (3) move relatively to restore to an initial working position, the piston (26) moves back to a balance position relative to the brake caliper body (3) under the action of the large sealing ring (12), due to abrasion of the friction plate, the pressure in the hydraulic cavity is reduced, the check valve (22) is opened, oil flows into the hydraulic cavity from the liquid supplementing tank (6), and volume change caused by abrasion of the friction plate is compensated. The return of the piston (26) is realized through a large sealing ring (12) and is the same as that of the traditional hydraulic disc brake, so that the brake clearance is kept consistent with that before abrasion, and the automatic adjustment of the brake clearance is realized.
When the hydraulic system fails and pressure cannot be built in the hydraulic cavity, the motor (8) can drive the gear rack mechanism to enable the lower rack (4A) to be in direct contact with the piston (26) through the curved surface end, and the friction plate (16) is pushed to press the brake disc (17) from two sides. When the friction plate (16) contacts with the brake disc (17) to generate friction force, the piston (26) moves relative to the lower rack (4A) due to the friction force and the curved surface action between the piston and the rack, so that the self-energizing effect is realized, and larger braking strength can be obtained by using smaller motor power. When the maximum braking strength is reached, the piston (26) and the mounting hole are not in contact.
When the brake is continuously operated for a long time, the temperature of the brake rises to cause the pressure in the hydraulic cavity to rise, and when the pressure rises to a certain value, the pressure limiting valve (23) is opened to avoid damage. The orifice (15) is used to eliminate the effect of pressure fluctuations.
When parking braking is needed, the motor (8) drives the friction plate (16) to press the brake disc (17) to meet the requirement of parking braking, when the reverse efficiency of the worm (11) and the worm wheel (7) is zero, the power can be cut off after the motor (8) is electrified to achieve the effect of parking braking, and the parking braking under the condition that the motor (8) is cut off is realized by utilizing the self-locking function of the worm and gear mechanism. The motor shaft (9) can be released when the electromagnetic brake (10) is powered on, and the motor shaft (9) is locked when the power is off, so that the braking efficiency is kept unchanged, and the parking brake under the condition that the motor (8) is powered off is realized. Or the electric control mechanical braking device is utilized to realize the parking braking function: when the electromagnetic coil (18) is electrified, the locking pin (20) is under the action of electromagnetic force, and the return spring (19) is compressed, so that the locking pin (20) is not in contact with the gear (5), and the brake or the release of the brake is not influenced; when parking braking is needed, the motor (8) drives the friction plate (16) to press the brake disc (17) to meet the parking braking requirement, then the electromagnetic coil (18) is powered off, the locking pin (20) is inserted into the teeth of the gear (5) under the elastic force action of the return spring (19), the parking braking effect is kept, and the parking braking function under the condition that the motor (8) is powered off can be achieved.
The embodiment of fig. 2 differs from the embodiment of fig. 1 mainly as follows:
The transmission mechanisms are different, a worm gear mechanism is adopted for transmission in the attached drawing 1, and a worm wheel (7) of a power output element is fixedly connected with a gear (5); in the attached figure 2, a planetary gear mechanism is adopted for transmission, and a power output element planet carrier (25) is fixedly connected with a gear (5).
The parking brake function is realized in a slightly different mode, in the attached figure 1, the parking brake under the condition that the motor (8) is powered off can be directly realized by utilizing the reverse efficiency of the worm gear mechanism as zero; in the attached figure 2, a link with zero reverse efficiency is not included in the transmission mechanism, and only the motor shaft (9) can be released when the electromagnetic brake (10) is powered on, and the motor shaft (9) is locked when the power is off to realize parking braking under the condition that the motor (8) is powered off; or an electric control mechanical braking device is adopted, when the electromagnetic coil (18) is electrified, the locking pin (20) is under the action of electromagnetic force, and the return spring (19) is compressed, so that the locking pin (20) is not in contact with the gear (5), and the braking or releasing of the brake is not influenced; when parking braking is needed, the motor (8) drives the friction plate (16) to press the brake disc (17) to meet the parking braking requirement, then the electromagnetic coil (18) is powered off, the locking pin (20) is inserted into the teeth of the gear (5) under the elastic force action of the return spring (19), the parking braking effect is kept, and the parking braking function under the condition that the motor (8) is powered off can be achieved.
The installation modes of the gear rack mechanisms are different, in the attached figure 1, the position of a gear (5) is relatively fixed, and a lower rack (4A) connected with a hydraulic cavity and an upper rack (4B) on a brake caliper body (3) are respectively driven to move; in the attached figure 2, a gear (5) and a planetary gear mechanism are mounted on a brake caliper body (3) together and meshed with a rack (4) connected with a hydraulic cavity.
The working process, the adjustment mode of the brake clearance and the like of the second embodiment are basically the same as those of the first embodiment, and detailed description is omitted here.
The transmission mechanism can adopt other transmission modes such as direct transmission, chain transmission, belt transmission, dead axle gear transmission, lever transmission, inhaul cable transmission and the like or the combination of the transmission modes except a worm gear mechanism and a planetary gear mechanism, and the locking mechanism can also realize the locking function by acting a locking pin on other gears or a special locking ratchet wheel integrated with the gears or installing a ratchet wheel and pawl mechanism on a motor shaft and the like. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without inventive labor based on the embodiments of the present invention belong to the protection scope of the present invention.
The present invention has been described in connection with the accompanying drawings, and it is to be understood that the invention is not limited to the specific embodiments disclosed, but is intended to cover various modifications, adaptations or uses of the invention, and all such modifications and changes are intended to be included within the scope of the invention.
Claims (8)
1. An electronic mechanical hydraulic line control brake comprises a motor, a transmission mechanism, a gear, a rack, a piston, a large sealing ring, a liquid supplementing tank, a one-way valve, a pressure limiting valve, a throttling hole, a brake caliper body, a brake disc and a friction plate; the method is characterized in that: the friction plates are symmetrically arranged on two sides of the brake disc, one friction plate is arranged on the piston, and the other friction plate is arranged on the brake caliper body; the motor is connected with a power input element of the transmission mechanism, and a power output element of the transmission mechanism is connected with the gear; the gear is meshed with the rack, and the rack is arranged on the brake caliper body and comprises a rack with a curved surface structure with a certain curvature at one end; the piston is arranged in an installation hole on the brake caliper body through the large sealing ring, one end of the piston is provided with the friction plate, and the other end of the piston is provided with a curved surface structure corresponding to the curved surface structure of the rack; a hydraulic cavity is arranged between the curved surface end of the piston and the curved surface end of the rack; the hydraulic cavity is connected with the liquid supplementing tank through the one-way valve; the hydraulic cavity is connected with the liquid supplementing tank through the pressure limiting valve, and the throttling hole is arranged between the pressure limiting valve and the hydraulic cavity.
2. The electro-mechanical hydraulic brake-by-wire of claim 1, wherein: the curved surface end of the piston is in direct contact with the curved surface end of the rack to form a contact curved surface, and the contact curved surface can be a slope, a circular arc surface, a hyperbolic surface, a parabolic surface and the like or a combination of the curved surfaces.
3. The electro-mechanical hydraulic brake-by-wire of claim 2, wherein: a gap is reserved between the piston and the mounting hole in the brake caliper body, the size of the gap is larger than the feedback of the deformation between the contact of the friction plate and the brake disc and the generation of the maximum braking efficiency on the contact curved surface of the piston and the rack in the braking work, and the size of the gap is smaller than the feedback of the free gap between the friction plate and the brake disc on the contact curved surface of the piston and the rack.
4. The electro-mechanical hydraulic brake-by-wire of claim 1, wherein: and a pressing mechanism is adopted between the rack and the brake caliper body to ensure the normal meshing of the gear and the rack and prevent the gear from being disengaged when the automobile bumps.
5. The electro-mechanical hydraulic brake-by-wire of claim 1, wherein: and a sealing device is arranged between the rack and the brake caliper body.
6. The electro-mechanical hydraulic brake-by-wire of claim 1, wherein: the brake caliper further comprises a rolling support on a support surface between the rack and the brake caliper body, so that friction resistance is reduced, and the working efficiency of the system is improved.
7. The electro-mechanical hydraulic brake-by-wire of claim 2, wherein: the piston is matched with the curved surface of the rack by adopting a roller mechanism to reduce the friction resistance.
8. The electro-mechanical hydraulic brake-by-wire of claim 1, wherein: when no transmission link with zero reverse efficiency exists in the transmission mechanism, parking braking under the condition of power failure of the motor is realized by adopting a locking mechanism, the locking mechanism adopts an electromagnetic brake or an electric control mechanical braking device and can be disconnected when being powered on, a transmission element in a transmission link is fixed when the power failure occurs, the pressure between the friction plate and the brake disc is kept, and the parking braking function is realized; when the transmission mechanism is provided with a transmission link with the reverse efficiency of zero, the parking brake can be realized by using the locking mechanism, and the parking brake under the condition of motor power failure can also be realized by using the transmission link with the reverse efficiency of zero and incapable reverse transmission of power and motion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910800232.8A CN110541898A (en) | 2019-08-20 | 2019-08-20 | Electronic mechanical hydraulic line control brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910800232.8A CN110541898A (en) | 2019-08-20 | 2019-08-20 | Electronic mechanical hydraulic line control brake |
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| Publication Number | Publication Date |
|---|---|
| CN110541898A true CN110541898A (en) | 2019-12-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910800232.8A Withdrawn CN110541898A (en) | 2019-08-20 | 2019-08-20 | Electronic mechanical hydraulic line control brake |
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| CN (1) | CN110541898A (en) |
Cited By (3)
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| CN112727952A (en) * | 2021-01-29 | 2021-04-30 | 山东交通学院 | Electro-hydraulic brake-by-wire with self-power-taking function |
| CN113027954A (en) * | 2021-03-25 | 2021-06-25 | 玉环思安安全设备股份有限公司 | Piston return structure of brake caliper |
| CN114664597A (en) * | 2021-12-24 | 2022-06-24 | 平高集团有限公司 | Motor power-off locking device of motor operating mechanism and circuit breaker |
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| CN112727952A (en) * | 2021-01-29 | 2021-04-30 | 山东交通学院 | Electro-hydraulic brake-by-wire with self-power-taking function |
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| CN113027954A (en) * | 2021-03-25 | 2021-06-25 | 玉环思安安全设备股份有限公司 | Piston return structure of brake caliper |
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| CN114664597A (en) * | 2021-12-24 | 2022-06-24 | 平高集团有限公司 | Motor power-off locking device of motor operating mechanism and circuit breaker |
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Application publication date: 20191206 |