KR20100030285A - Electro mechanical brake system having ratchet typed electro parking brake device - Google Patents

Electro mechanical brake system having ratchet typed electro parking brake device Download PDF

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Publication number
KR20100030285A
KR20100030285A KR1020080089167A KR20080089167A KR20100030285A KR 20100030285 A KR20100030285 A KR 20100030285A KR 1020080089167 A KR1020080089167 A KR 1020080089167A KR 20080089167 A KR20080089167 A KR 20080089167A KR 20100030285 A KR20100030285 A KR 20100030285A
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KR
South Korea
Prior art keywords
parking
ratchet
gear
brake
solenoid
Prior art date
Application number
KR1020080089167A
Other languages
Korean (ko)
Inventor
박동일
Original Assignee
현대모비스 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 현대모비스 주식회사 filed Critical 현대모비스 주식회사
Priority to KR1020080089167A priority Critical patent/KR20100030285A/en
Publication of KR20100030285A publication Critical patent/KR20100030285A/en

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00Parts or details
    • F16D65/14Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
    • F16D65/16Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake
    • F16D65/18Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together, e.g. for disc brakes
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2121/00Type of actuator operation force
    • F16D2121/18Electric or magnetic
    • F16D2121/24Electric or magnetic using motors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2125/00Components of actuators
    • F16D2125/18Mechanical mechanisms
    • F16D2125/20Mechanical mechanisms converting rotation to linear movement or vice versa
    • F16D2125/34Mechanical mechanisms converting rotation to linear movement or vice versa acting in the direction of the axis of rotation
    • F16D2125/40Screw-and-nut
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2125/00Components of actuators
    • F16D2125/18Mechanical mechanisms
    • F16D2125/44Mechanical mechanisms transmitting rotation
    • F16D2125/46Rotating members in mutual engagement
    • F16D2125/48Rotating members in mutual engagement with parallel stationary axes, e.g. spur gears
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2127/00Auxiliary mechanisms
    • F16D2127/06Locking mechanisms, e.g. acting on actuators, on release mechanisms or on force transmission mechanisms
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2129/00Type of operation source for auxiliary mechanisms
    • F16D2129/06Electric or magnetic
    • F16D2129/08Electromagnets

Abstract

PURPOSE: An electric braking device with a parking brake function using a ratchet is provided to prevent the durability decrease of a solenoid by reducing the size and complexity of an electro mechanical brake. CONSTITUTION: An electric braking device with a parking braking function using a ratchet comprises an electronic control unit(1), a reducer(5), a spindle piston(9), a parking brake assembly(10), and a caliper(2). When the electronic control unit senses a signal of a pedal, it generates a brake control signal for braking and measurement information about the driving status of a vehicle. The reducer is rotated by a motor(4) which is controlled by the electronic control unit. The spindle piston is rotated by the reducer. The parking brake assembly prevents a NSL screw-type spindle piston from coasting. The caliper comprises inner and outer pads which pressures a wheel disk.

Description

Electro mechanical brake system having ratchet typed electro parking brake device
The present invention relates to an electric brake apparatus, and more particularly, to an electric brake apparatus having a parking braking function using ratchet.
In general, a brake system is a brake device used to maintain a parking state while simultaneously decelerating or stopping a driving vehicle.
Such brakes typically use frictional brakes, which convert kinetic energy into thermal energy using friction force and release it into the atmosphere to brake the disc, which brakes the disk rotating together with the wheels while the pads are pressed by hydraulic pressure. It will perform the function.
However, such a hydraulic brake is implemented in such a way that the pad is strongly pushed toward the disc by using hydraulic pressure during braking, so that the master cylinder is operated through a booster for boosting pedal operation force and generates hydraulic pressure, and the hydraulic line leading to the wheel cylinder. Of course, a complex configuration can not only be made of a variety of devices for controlling and assisting them, but the complexity of the configuration and the reliability of the braking performance according to the hydraulic use, there are bounded to some extent to enhance the stability and the vulnerability.
Accordingly, EMB (Electro mechanical Brake) is used, which brings the simplicity of the configuration that the hydraulic brake does not have and can enhance the reliability of braking performance.
However, the EMB, which uses the motor driving force as the disc braking force, has a complex structure due to the application of the reduction gear and the non-self locking type piston, and this complicated mechanism has many additional functions, especially an electric parking function. The addition of Electro Parking Brake (EPB) not only increases the size and weight of the EMB more than the hydraulic calipers, but also complicates the overall configuration, resulting in a more compact packaging layout. There is a vulnerability to be disadvantaged.
Accordingly, the present invention has been invented in view of the above, and uses a solenoid and ratchet (EPB), which is an electric parking function (EPB) added to an electro mechanical brake (EMB) using a motor driving force as a disk braking force. In addition to reducing the size and weight of the EMB and minimizing its complexity, it not only reduces packaging layout deterioration but also solenoid off switching due to non-self locking type pistons that apply wheel disc braking force. The purpose is to maintain the braking constraints generated at the time of operation.
In addition, the present invention, while the EPB added to the EMB using the solenoid and the ratchet method, the reaction force applied to the ratchet after the parking braking does not act in the solenoid axial direction, thereby preventing the solenoid durability from deteriorating due to the parking braking. The purpose is to make it possible.
The present invention for achieving the above object is, ECU for generating a control signal for braking together with the measurement information on the vehicle running state when the electric brake device detects a signal of the pedal;
A reducer rotated through a motor that is controlled by the ECU and generates power;
A spindle piston which is rotated through the reducer and applies a Non-Self Locking (NSL) screw type to generate an axial movement for moving the pad toward the wheel disk;
A parking braking assembly for restraining the slide of a non-self locking (NSL) screw type spindle piston subjected to a reaction force received from the wheel disk side by using a ratchet plate interlocked with a solenoid switched to off after parking braking;
A caliper having an inner outer pad that pressurizes and brakes the wheel disk;
Characterized in that consisting of.
To this end, the speed reducer is a drive gear that rotates with the motor, a parking brake gear that is rotated in engagement with the drive gear and a piston drive gear that is engaged with the parking brake gear to provide rotation for axial movement of the spindle piston. The parking brake gear and the piston drive gear are arranged perpendicular to each other.
In addition, the parking braking assay may include a solenoid having a moving shaft inserted and withdrawn on and off through an ECU, a ratchet plate and a ratchet plate portion that is seesawed through the moving shaft of the solenoid. It consists of a tension spring that pulls in.
To this end, the ratchet plate is characterized in that the seesaw movement through the hinge stage while moving along the stepped movement axis in the longitudinal direction.
According to the present invention, after the EMB (Electro mechanical Brake) using the motor driving force as the wheel disk braking force, the solenoid restrains the ratchet part after switching off the solenoid according to the parking braking, parking braking The ratchet reaction force through the non-self locking (NSL) screw type spindle, which is subjected to the wheel disc reaction force, is prevented from acting in the axial direction of the solenoid, thereby preventing the solenoid durability from being lowered.
In addition, the EMB of the present invention uses a non-self locking (NSL) screw type spindle restraint to maintain the parking braking force by using a solenoid and a ratchet structure, thereby minimizing the structural complexity of the EMB and improving packaging layout. There is an effect that can be improved.
DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Since the exemplary embodiments of the present invention may be implemented in various different forms, one of ordinary skill in the art to which the present invention pertains may be described herein. Not limited to the embodiment.
1 is a block diagram of an electric brake device having a parking braking function using a ratchet according to the present invention. An EMB (Electro Mechanical Brake), which is an electric brake device of the present invention, grasps a vehicle driving state, and an electronic pedal. Reducer (5) is provided with an ECU (1) for receiving a signal of the control unit and generating a control signal, and having a motor (4) for generating power under the control of the ECU (1), and rotating through the power of the motor (4). And a spindle piston 9 for generating an axial movement for moving the pad toward the wheel disk by using the rotational force through the speed reducer 3.
In addition, the NMB (Non-Self Locking) screw type spindle piston that receives the reaction force from the wheel disk side by using the ratchet plate 13 interlocked with the solenoid 11 that is turned off after parking braking. The parking brake assembly 10 which restrains the jungle of 9) is further mounted.
In addition, the motor 4, the spindle piston 9, and the solenoid 11 constituting the EMB are mounted on a caliper or by using a housing 3 coupled to a separate caliper.
To this end, the ECU 1 is provided with vehicle depression information through the yaw moment sensor mounted on the vehicle together with the depression amount information of the electronic pedal to be operated to implement the control required during braking.
In addition, the caliper (2) on which the EMB is mounted has an inner outer pad disposed on both sides of the wheel disk to pressurize the wheel disk, and the outer pad positioned on the opposite side of the inner pad during braking is also directed to the wheel disk (D). It is usually provided with a torque member (which is a function of a normal caliper type brake) that implements an interlocking action to be moved, and also to maintain a set distance at all times by detecting an increase in the distance between wheel discs as the pad exceeds a set distance. It will have a wear detection sensor.
In addition, the reduction gear 5 is engaged with the driving gear 6 which rotates together with the motor 4, the parking brake gear 7 which is rotated by being engaged with the driving gear 6, and the parking braking gear 7. Consisting of a piston drive gear 8.
Here, the ratchet plate 13 interlocked with the solenoid 11 that is switched off after parking braking is caught by the gear tooth 7a of the parking brake gear 7, and the NSL receives a reaction force received from the wheel disk. (Non-Self Locking) Constrains the push of the screw type spindle piston (9).
Such a gear tooth 7a of the parking brake gear 7 is formed in one direction like a tooth structure.
In addition, the spindle piston (9) consists of a spindle shaft and a nut coupled by applying a ball or roller type screw so that an axial movement to push the inner pad portion toward the wheel disk when rotation through the reducer (5) occurs. This applies to NSL (Non-Self Locking) screw type that minimizes friction during rotation and axial movement.
In addition, the parking braking assembly 10 includes a solenoid 11 having a moving shaft 12 inserted and drawn out on and off through the ECU 1 and the movement of the solenoid 11. It consists of a ratchet plate 13 which is seesawed through the shaft 12 and a tension spring 16 which presses the ratchet plate 13 portion.
To this end, the moving shaft 12 is formed to have a step along the longitudinal direction, that is, the end portion of the moving shaft 12 to form a smaller width or diameter than the other portion of the moving shaft 12 It acts to apply a pressing force while gradually contacting withdrawal length.
For example, at the position where the pressing end 12a of the moving shaft 12 ends, the release end 12b that extends to the end portion of the moving shaft 12 is inclined, and is also a conventional ramp type. Will be achieved.
In addition, the ratchet plate 13 is fixed via the hinge end 14, so that when one part is moved through the moving shaft 12 of the solenoid 11, the restraining end 15 forming the opposite side is the hinge end. It acts to be pressed by means of (14).
This, the restraint end 15 is the tension spring 16 is continuously pulled.
In addition, the restraint end 15 forms a sharp triangular protrusion shape, which is engaged with the restraint end 15 and the gear tooth 7a when engaged with the tooth structure gear tooth 7a of the parking brake gear 7. Even if the position is shifted, the restraint stage 15 is pushed out of the gear tooth 7a to engage in position.
EMB (Electro Mechanical Brake), which is an electric brake device of the present invention, uses NSL (Non-Self Locking) when braking using the rotation of the reducer 5 through the motor 4 generating power by the ECU 1 control. The axial movement of the screw-type spindle piston 9 moves the pad toward the wheel disk to realize braking, and the parking brake gear 7 which forms the reducer 5 when the solenoid 11 is switched off. As the ratchet plate (13) engages and restrains the sliding of the NSL (Non-Self Locking) screw type spindle piston (9), which receives the reaction force from the wheel disk side, the NSL (Non-), which receives the wheel disk reaction force after parking braking, Self Locking) The ratchet plate 13 reaction force through the screw-type spindle piston 9 does not act in the axial direction of the solenoid 11, which degrades durability.
To this end, the EMB has a reducer 3 that is rotated through a motor 4 that generates power under the control of the ECU 1, as shown in FIG. 1, and the shaft is rotated using the rotation of the reducer 3. It is provided with a spindle piston 9 which is moved in the direction to generate a braking force by moving the pad toward the wheel disk.
In addition, when the solenoid 11 is turned off after parking braking, the ratchet plate 13 moves the hinge end 14 through the positional movement of the moving shaft 12 withdrawn from the solenoid 11. Parking brake assembly (10), which acts as a seesaw and constrains the reducer (6) to restrain the skid of the NSL (Non-Self-Locking) screw type spindle piston (9), which receives the reaction force from the wheel disc side (10). ) Is further provided.
The braking operation implemented in the EMB having such a configuration is that when the motor 4 driven through the ECU 1 rotates the speed reducer 6, the parking brake gear engaged with the drive gear 6 constituting the speed reducer 6 7) and the piston drive gear 8 are sequentially rotated, and the non-self locking (NSL) screw type spindle piston 9 is moved forward in the axial direction by the rotation of the piston drive gear 8.
In this way, when the spindle piston 9 is advanced to push the inner pad toward the wheel disk, the outer pad positioned to the opposite side is also moved to the wheel disk by the torque member action of the caliper, so that a braking action is performed.
Meanwhile, as shown in FIG. 2, even when the parking brake is applied, the ECU 1 receiving the parking signal drives the motor 4 to rotate the reducer 6, and the spindle piston ( 9) is moved in the axial direction, thereby pushing the inner pad and the outer pad toward the wheel disk to form the parking braking force.
As such, when the parking brake force is formed by the action of the spindle piston 9, the key is turned off and the solenoid 11 is switched off, so that the movement shaft 12 is pulled out of the solenoid 11. Come out.
Due to this, the withdrawal of the moving shaft 12 results in a positional movement with respect to the ratchet plate 13 fixed to seesaw behavior via the hinge end 14, which leads to a ratchet plate ( The restraint end 15 of 13) acts to overcome the pulling of the tension spring 16 and to move down, whereby the restraint end 15 engages with the gear teeth 7a of the parking brake gear 7 and the spindle. It restrains the piston 9.
When the ratchet plate 13 is positioned as the release end 12b of the moving shaft 12 inserted in the ON state of the solenoid 11, the ratchet plate 13 is as shown in FIG. Likewise, the ratchet plate 13 is in the release position b, whereby the restraint end 15 is lifted by the tension spring 16.
However, when the ratchet plate 13 is moved from the release end 12b toward the pressing end 12a while the moving shaft 12 is pulled out, the ratchet plate 13 is constrained with respect to the hinge end 14. ) Side overcomes the tension spring 16 and goes down as shown in the restraint position a.
As a result, the movement of the ratchet plate 13 causes the restraining end 15 to be engaged with the gear tooth 7a of the parking brake gear 7, and this engagement is a piston drive gear meshed with the parking brake gear 7. By constraining (8), the spindle piston 9 to which the piston drive gear 8 is fixed is also constrained.
Due to the restraint on the piston drive gear 8, the sliding of the non-self-locking (NSL) screw type spindle piston 9 which is subjected to the reaction force received from the wheel disk side is blocked, and is transmitted to the ratchet plate 13. The reaction force does not act in the axial direction of the solenoid 11.
In addition, the structural features of the ratchet plate 13, that is, the sharp end of the ratchet plate 13 has a constrained end 15 having a sharp triangular protrusion shape, and the gear teeth 7a of the parking brake gear 7 are sawtooth-shaped. As shown in Fig. 1, the restraint stage 15 and the gear tooth 7a are disengaged from each other, even when the engagement position of the restraint stage 15 and the gear tooth 7a are shifted. Can be made.
1 is a block diagram of an electric brake device having a parking braking function using a ratchet according to the present invention.
2 is an operation of the ratchet type parking apparatus according to the present invention
    <Description of the symbols for the main parts of the drawings>
1: ECU 2: Caliper
3: housing 4: motor
5: reducer 6: drive gear
7: parking brake gear 7a: gear teeth
8: piston driving gear
9: spindle piston 10: parking braking assembly
11: solenoid 12: movement axis
12a: Pressurized stage 12b: Release stage
13: ratchet plate 14: hinged stage
15: restraint stage 16: pressure spring

Claims (9)

  1. An ECU 1 for generating a control signal for braking together with the measurement information on the vehicle driving state when detecting the signal of the pedal;
    A reducer 5 which is controlled by the ECU 1 and rotates through a motor 4 for generating power;
    A spindle piston 9 which is rotated through the reducer 5 and applies a non-self locking (NSL) screw type to generate an axial movement to move the pad toward the wheel disk;
    The ratchet plate 13 interlocked with the solenoid 11, which is switched off after parking braking, restrains the sliding of the NSL (Non-Self Locking) screw type spindle piston 9 which receives the reaction force from the wheel disk side. A parking braking assembly 10;
    A caliper 2 provided with an inner outer pad for pressurizing and braking the wheel disk;
    Electric brake device with a parking braking function using a ratchet, characterized in that consisting of.
  2. 2. The electric brake apparatus according to claim 1, wherein the motor (4), spindle piston (9) and solenoid (11) are housed in a housing (3) coupled to the caliper side.
  3. 2. The reduction gear (5) according to claim 1, wherein the reduction gear (5) includes a drive gear (6) which rotates together with the motor (4), a parking brake gear (7) which rotates in engagement with the drive gear (6) and the parking brake gear (7). And a piston drive gear (8) which engages with and provides rotation for axial movement of the spindle piston (9).
  4. 4. The electric brake apparatus according to claim 3, wherein the parking brake gear (7) and the piston drive gear (8) are arranged perpendicular to each other.
  5. 4. The electric brake apparatus according to claim 3, wherein the gear teeth (7a) of the parking brake gear (7) are inclined in one direction.
  6. The method according to claim 1, wherein the parking brake assembly 10 is a solenoid (11) having a solenoid (11) having a moving shaft (12) inserted and withdrawn (On / Off) through the ECU (1), the solenoid Parking brake using ratchet, characterized in that it consists of a ratchet plate 13 which is seesaw movement through the moving shaft 12 of the 11 and a tension spring 16 for pulling the ratchet plate 13 portion. Electric brake unit with function.
  7. 7. The parking using ratchet according to claim 6, wherein the ratchet plate (13) is moved along the moving axis (12) in the longitudinal direction while being sawsawed through the hinge end (14). Electric brake unit with braking function.
  8. The ratchet plate (13) according to claim 6, wherein the ratchet plate (13) is fixed via a hinge end (14) so that one part is located on the moving shaft (12) of the solenoid (11) and the other side is fitted to the parking brake gear (7). Electric brake device with a parking brake function using a ratchet, characterized in that the physics restraining end 15 is formed.
  9. 9. The electric brake apparatus according to claim 8, wherein the restraining end (15) forms a sharp triangular protrusion shape.
KR1020080089167A 2008-09-10 2008-09-10 Electro mechanical brake system having ratchet typed electro parking brake device KR20100030285A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020080089167A KR20100030285A (en) 2008-09-10 2008-09-10 Electro mechanical brake system having ratchet typed electro parking brake device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020080089167A KR20100030285A (en) 2008-09-10 2008-09-10 Electro mechanical brake system having ratchet typed electro parking brake device

Publications (1)

Publication Number Publication Date
KR20100030285A true KR20100030285A (en) 2010-03-18

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KR1020080089167A KR20100030285A (en) 2008-09-10 2008-09-10 Electro mechanical brake system having ratchet typed electro parking brake device

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9677631B2 (en) 2015-10-27 2017-06-13 Daegu Gyeongbuk Institute Of Science And Technology Electro-mechanical brake device
US9874258B2 (en) 2016-05-10 2018-01-23 Hyundai Motor Company Electromechanical brake capable of automatically releasing parking braking

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9677631B2 (en) 2015-10-27 2017-06-13 Daegu Gyeongbuk Institute Of Science And Technology Electro-mechanical brake device
US9874258B2 (en) 2016-05-10 2018-01-23 Hyundai Motor Company Electromechanical brake capable of automatically releasing parking braking

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