KR20090006968A - Additional functions embodiment using solenoid linkage motor power typed single motor electric wedge brake sysrem - Google Patents

Abstract

A single motor electronic wedge brake system implementing the additional function is provided that the pad positioning interval maintenance function and fail-safe function are implemented. A single motor electronic wedge brake system implementing the additional function comprises a solenoid mechanism connected in one motor(13). The solenoid mechanism implements the pad positioning interval maintenance, and the fail-safe function and electron parking brake function. The solenoid mechanism includes a pressurizing block(70) contacted with the wedge base plate(20), a movement adjuster(40) supporting the pressurizing block, a support adjuster(50) pressurizing the side of the pressurizing block, a solenoid unit controlling the support adjuster and the movement adjuster, an EPB spring located between the movement adjuster and pressurizing block.

Description

Additional functions embodiment using solenoid linkage motor power typed Single Motor Electric Wedge Brake Sysrem}

The present invention relates to a wedge brake system, and more particularly, to an additional function implementation type single motor electronic wedge brake system through solenoid and motor linkage.

In general, a brake system is a brake device used to maintain a parking state while simultaneously decelerating or stopping a driving vehicle.

Such brake systems typically use friction brakes, which convert kinetic energy into thermal energy using friction and release it into the atmosphere, which brakes the disk rotating on both sides of the wheel with hydraulic pressure. The braking function is performed.

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 hydraulic pressure is applied to the master cylinder that is operated through the booster that boosts the pedal operating force and generates the hydraulic pressure, and the hydraulic pressure leading to the wheel cylinder. As well as the line, a variety of devices for controlling and assisting them must be made a complex configuration, and the complexity of the configuration and the reliability of the braking performance according to the hydraulic use, there is a certain limit to the stability enhancement, etc., there is a vulnerability.

This brings the simplicity of the hydraulic brakes, the reliability of the braking performance and the parking brake function can be realized, as well as improving the responsiveness and performance of the anti-braking system (ABS) and further integrated chassis control. The trend is developing and applying an Electro Wedge Brake (EWB) system for optimal implementation.

The electronic wedge brake, EWB, uses a wedge assembly operated through an actuator to apply braking action by rubbing the brake pad toward the disc using a wedge assembly operated through an actuator.

At this time, the EWB can realize the braking force of the hydraulic brake even when using a motor using a voltage of 12V, which is the EWB self-energizing using the wedge phenomenon (Wedge) This is because the wedge moves and the pad is pressed by the actuator, and the friction force between the pad and the disk acts as an additional input force. Even if the force is small, a large braking force can be realized.

In addition, these EWBs provide a correction to automatically maintain the pad's set distance to the disk when the pad's set interval retention is exceeded, ie move the wedge assembly area toward the pad to adjust the pad gap beyond the set interval. It is done.

In addition, the EWB is fail-safe, that is, the braking force is not released during brake fail, and the braking force is continuously applied to prevent abnormal rotation of the vehicle body during normal driving. The function of releasing the braking force in the brake fail is also given.

In addition, the EWB can implement an electric parking brake (EPB) function, which is an electronic parking brake.

However, as the EWB implements not only a braking function but also a number of additional pad setting interval maintenance functions, a fail-safe function, and an EPB function, the overall component configuration becomes very complicated, and in particular, a braking function is provided. In addition to the motors, the separate motors for the implementation of many additional functions have the vulnerability of requiring two motors.

In addition, by using two motors that generate separate powers as described above, the overall size increase due to the motor accommodation space is inevitably caused, and the increase in size causes inconvenience of mounting constraints on the wheel part. .

Accordingly, the present invention has been invented in view of the above. As the electronic wedge brake (EWB, Electro Wedge Brake) implements a braking function using the power generated from one motor, the overall motor is reduced to one and used as a whole. Its purpose is to reduce the size and improve mounting, and to reduce the cost and weight by reducing the number of components for implementing motor power conversion by using one motor.

In addition, the present invention is the pad setting interval maintenance function, which is an additional function implemented in the electronic wedge brake (EWB) (EWB), while receiving the power generated from one motor controlled by the ECU during braking, the axially moved As it is implemented using a non-self-locking (NSL) type screw structure, the purpose is to facilitate the overall design by simplifying the power transmission structure.

The present invention for achieving the above object, the linear force change in the rotational force generated from one motor driven through the ECU for generating a control signal according to braking using the operation signal of the electronic pedal and the information measured in the vehicle Is converted to axial movement through wealth,

The inner outer pad assembly is brought into close contact with the disc wrapped in the wedge caliper, and the self-entering through the wedge action according to the positional movement of the wedge roller having a diameter gives the braking force by the pressing force on the disk. In a single motor electronic wedge brake system,

Connected to one motor controlled by the ECU, the solenoid mechanism provides additional functions such as fail-safe function and electronic parking brake (EPB) function while maintaining pad setting intervals. this,

A pressure block in contact with the wedge base plate located opposite the wedge roller located on the rolling contact surface of the wedge moving plate for pressing the inner pad assembly;

A movement adjuster which receives the power of the motor through a motor interlocking member made of gears and is axially moved to push the pressure block;

Support adjuster for pressing the side of the pressing block with the axial movement force generated through the pressing force of the pressing spring, as it is located in the bottom portion of the moving adjuster, NSL (Non-Self Locking) type screw coupled,

A solenoid unit that is constrained or released while being contacted with the motor shaft portion, the moving adjuster and the supporting adjuster by being turned on and off through the ECU;

EPB spring positioned between the moving adjuster and the pressurizing block to perform the EPB function, an electronic parking brake when parking

Characterized in that consisting of.

In addition, the movement adjuster is screwed to the support nut 41 which is axially moved along with the rotation of the push rod shaft coupled to the housing portion, coupled to the rotary shaft of the motor to transfer the rotational force of the motor toward the push rod shaft It consists of a motor interlocking member, a thrust bearing coupled to the end of the push rod shaft, and an EPB spring fixed to the end of the bearing to maintain a restraining force during parking braking.

Here, the motor interlock member is composed of a drive gear coupled to the rotary shaft of the motor to rotate with the motor, and a driven gear coupled to the push rod shaft to rotate the push rod shaft through the rotation force transmitted from the drive gear. It is done.

In addition, the support adjuster is screwed to a support nut coupled to the housing, and when the binding force of the solenoid is released, the push rod shaft is moved in the axial direction, a thrust bearing coupled to the end of the push rod shaft, and one end of the housing portion. The other end consists of a pressure spring which is assembled in its initial state to apply a constant axial force towards the bearing.

In addition, the solenoid unit is a solenoid that is turned on (On) and off (Off) through the ECU (2), a switching lever that moves up and down through the pull-out and retracting shaft during operation of the solenoid, when the switching lever is in contact The rotational force of the motor is provided with a motion change nut which is converted to axial movement through a linear motion changer and a lower portion of the switching lever, so that the upward force is spaced apart from the motion change nut and the push rod shaft when the solenoid is released. A return spring is provided.

In addition, the pressure block is composed of a base block fixed to the housing portion so as not to move, and a moving block having a wedge inclined surface cut equally to be in close contact with the wedge inclined surface that is an inclined cut surface of the base block.

According to the present invention, an electronic wedge brake (EWB) using one motor that generates power for main braking during braking, and NSL (Non-Self Locking) together with a gear operated in conjunction with one motor As the additional functions such as the maintenance of the pad setting interval are realized by the automatic axial movement using the type screw structure, it is possible to solve the problem that may occur when using two power generating motors, It is possible to improve the mountability due to the reduction of the overall size by using, to reduce the cost and weight by reducing the number of motor motion conversion components, as well as to simplify the design by simplifying the motion conversion structure between motor-related parts.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of an additional function implementing type single motor electronic wedge brake system through a solenoid and a motor interlock according to the present invention. The single motor electronic wedge brake system of the present invention is operated by a driver for braking a vehicle. An electronic pedal (1), an ECU (2) for implementing control in consideration of vehicle information during braking, a wedge caliper (6) for pressing the disk (5) rotating together with the wheels to perform braking, and an ECU (2) for braking. Pressurizes the pad toward the disk 5 with the power generated by one of the motors 13 to control the brake, and also maintains a pad setting interval, a fail-safe and an electronic parking brake (EPB). It consists of a wedge actuator assembly (10) with a solenoid mechanism (Solenoid Mechanism) for implementation.

In addition, the single motor electronic wedge brake system is further provided with an auxiliary battery (4), which is used for the motor (13) and solenoid (61) of the ECU (2) and the actuator assembly (10). Used as a spare battery.

In addition, the single motor electronic wedge brake system receives a signal so that the ECU 2 recognizes the parking brake switching state when the parking brake is operated. For example, a separate electric signal is generated toward the ECU 2 at the driver's seat. The parking brake button is used.

The single motor electronic wedge brake system further includes a housing for receiving a wedge actuator assembly 10 therein, and the housing is coupled using a wedge caliper 6.

In addition, the ECU 2 receives the vehicle attitude information through the yaw moment sensor 3 mounted on the vehicle together with the depression amount information of the electronic pedal 1 to be operated to implement the control required for braking. .

In addition, the wedge caliper 6 and the wedge actuator assembly 10 coupled to the wedge caliper 6 have various sensors mounted thereon to transmit measurement signals to the ECU 2. Pad wear detection sensor to detect the increase in gap between the two wheels to maintain the set distance at all times, as well as to prevent wheel jamming that may occur when the pad is pressed against the disc 5 by the action of the wedge roller during braking. A load sensor or the like is provided.

In addition, the wedge caliper 6 surrounds the disk 5 which rotates together with the wheels, and is disposed on both sides of the disk 5 and presses the inner outer pad assembly 7 to press the disk 5 therein. 8).

This wedge caliper 6 is a torque that implements an interlocking action such that when the inner pad assembly 7 is pressed toward the disk 5, the outer pad assembly 8 located opposite to the disk 5 is also moved toward the disk 5. Member (which is a function of a conventional caliper type brake).

The wedge actuator assembly 10 is interlocked with a braking motor unit 11 that generates a braking force with power generated by one motor 13 controlled by the ECU 2, and the braking motor unit 11. NSL which is axially moved while being geared and interlocked with the wedge braking unit 16 and the motor 13 to press the pad assemblies 7 and 8 toward the disk 5 at one side of the wedge caliper 6. It consists of a solenoid mechanism that controls various non-self-locking type screws through the solenoid 61 and implements various additional functions such as maintaining the set intervals of the pad assemblies 7 and 8.

To this end, the braking motor unit 11 is provided with one side at the side of the wedge caliper 6, as shown in Figure 2 (a), (b) and the motor 13 controlled by the ECU (2) and The coupling plate 15a is coupled to the linear motion converter 14 and the linear motion converter 14 which are coupled to the output shaft of the motor 13 and axially moved forward and backward with respect to motor rotation. It consists of the interlocking rod 15 which moves together along the axial movement of the linear motion converter 14.

Here, the linear motion conversion unit 14 is configured to be coupled to the inner surface and the screw formed on the outer circumferential surface of the rotating shaft when the rotating shaft is rotated through the motor 13 to move forward and backward in the axial direction according to the rotation direction of the rotating shaft, This configuration is a structure that is typically applied to the vehicle's EWB.

In addition, the linkage rod 15 may be directly fixed to the linear motion change unit 14 without using the connecting plate 15a.

In addition, the linkage rod 15 is configured such that two pairs are formed in the upper and lower portions of the linear motion converter 14 so that the moving force through the linear motion converter 14 is uniform.

In addition, the wedge braking unit 16 includes a connecting rod 18 fixed to the side of the motor 13 so as to receive an axial movement force according to the rotation of the motor 13, and a disk opposite to the outer pad assembly 8. The wedge moving plate 17, the wedge moving plate 17, which is moved through an integrally formed connecting rod 18 so as to press the inner pad assembly 7 positioned toward (5) toward the disk 5. It consists of a wedge base plate 20 which is arranged parallel to the () and a rolling contact surface (17a, 20a) formed between a pair of plates (17, 20), generating a friction force It is done.

In addition, the connecting rod 18 is fixed to the end of the linkage rod 15 that is axially moved through the linear motion converter 14 according to the rotation of the motor 13, the movement direction of the linkage rod 15 The wedge plate 17 is moved together.

In addition, the connecting rod 18 is extended at right angles to the surface at the upper and lower portions of the wedge moving plate 17, and is fixed to the end of the linkage rod 15 via a bolt or the like.

In addition, the wedge roller 19 has a circular column shape positioned between a pair of plates 17 and 20 arranged to face each other, and through frictional force generated by the behavior of the plates 17 and 20. It generates a wedge phenomenon that realizes a self-energizing action, and acts as an input force to press the pad.

To this end, the wedge roller 19 is located between the rolling contact surface (17a, 20a) of the cross-sectional shape of the V (V) groove formed on the surface of a pair of plates (17, 20) facing each other, respectively, V) The rolling contact surfaces 17a and 20a having the groove cross-sectional shape move one plate (wedge plate 17) toward the pad in accordance with the positional change of the wedge roller 19, together with the generation of frictional force with the wedge roller 19. The act of giving is simultaneously implemented.

In addition, the wedge base plate 20 is installed to move only in a direction perpendicular to the pad without being pushed compared to the wedge moving plate 17 that is driven by the power of the motor 13, for this, the wedge base plate 20 Is mounted to the housing part.

Meanwhile, the Solenoid Mechanism, which implements a number of additional functions in addition to the main braking function through the braking motor unit 11 and the wedge braking unit 16 during the EWB operation, is a non-self-locking (NSL) type screw. Combined adjuster unit 30, a pair of solenoid unit 60 to release and lock the binding force of the adjuster unit 30 while being turned on and off under the control of the ECU (2), the disk due to pad wear ( It consists of a pressure block 70 is moved under the pressure from the adjuster unit 30 to eliminate the excess of the set interval for 5).

To this end, the adjusting unit 30 is a solenoid, which is located at the bottom of the moving adjuster 40 and the moving adjuster 40 which is axially moved by transmitting power of the motor 13 through a gear. Consists of a non-self locking (NSL) type screw-coupled support adjuster (50) in which the restraining force is released and locked through (41).

Here, as shown in Figure 3, the movement adjuster 40 is screwed to the support nut 41 which is axially moved with rotation, the push rod shaft 42 coupled to the housing portion, the motor 13 The motor interlocking member 45 is coupled to the rotary shaft of the transmission to transfer the rotational force of the motor 13 toward the push rod shaft 42, the bearing 43 and the bearing coupled to the end of the push rod shaft 42 It is composed of an EPB spring (44) fixed to the end of the 43 to maintain the restraining force during parking braking.

Here, the push rod shaft 42 and the support nut 41 use a non-self locking (NSL) type screw having a very large lead angle, or a screw type having a conventional lead angle. Will be used.

The bearing 43 is formed of a thrust bearing that receives an axial force.

In addition, the motor interlocking member 45 is coupled to the rotation shaft of the motor 13, the drive gear 46 is rotated with the motor 13, and the push rod shaft (through the rotation force transmitted from the drive gear 46) It consists of a driven gear 47 coupled to the push rod shaft 42 to rotate 42.

Here, the drive gear 46 and the driven gear 47 is made of a bevel gear (Bevel Gear) type, which is because the mounting of the motor 13 is made obliquely in the housing, The type of gear also varies according to the arrangement in the housing according to the mounting.

As the drive gear 46 and the driven gear 47 are rotated, the push rod shaft 42 is rotated without axial movement, but the support nut 41 screwed to the push rod shaft 42 is rotated. Along with the axial movement.

In addition, the support adjuster 50 is screwed to the support nut 51 coupled to the housing, and the push rod shaft 52 and the push rod shaft 52 which are axially moved when the restraining force of the solenoid 61 is released. The bearing 53 coupled to the end of the c) and one end is fixed to the housing part and the other end is composed of a pressing spring 54 assembled in an initial state to exert a continuous axial force toward the bearing 53.

Here, when the push rod shaft 52 and the support nut 51 are subjected to an axial direction by using a non-self-locking (NSL) type screw, that is, a screw having a very large lead angle, Due to the large lead angle, it is automatically rotated and moved in the axial direction.

The bearing 53 is formed of a thrust bearing that receives an axial force.

In addition, the solenoid unit 60 is a solenoid 61 that is turned on (on) and off (Off) through the ECU 2, as shown in Figure 4 (a), (b), and the solenoid 61 Of the switching lever 62 that moves up and down through the shaft that is pulled out and drawn in during operation of the motor and the rotational force of the motor 13 is switched to the axial movement through the linear motion conversion unit 14 when the switching lever 62 is in contact with the switching lever 62. Which consists of a movement switching nut 63.

In addition, the switching lever 62 has various shapes. For example, the switching lever 62 is moved downward when the solenoid 61 is pressed upward, and the upper portion is provided with the movement switching nut (side) provided on the motor 13 side. 63), the lower end thereof comes into close contact with the push rod shaft 52 of the support adjuster 50, and when the downward load of the solenoid 61 is released, the support nut 41 of the movable adjuster 40 is released. ) To form a shape in close contact with the site.

At this time, the contact portion of the movement switching nut 63, the support nut 41 and the push rod shaft 52 of the switching lever 62 has a variety of shapes for implementing the behavior according to the contact.

In addition, the motion change nut 63 is interlocked with the drive gear 46 coupled to the motor 13 shaft so that when the solenoid 61 is in contact with the switching lever 62 in the on state, the motor 13 The rotational force of) acts to be converted to axial movement through the linear motion converting portion 14.

That is, when the switching lever 62 comes into contact with the motion change nut 63, the relative motion (fixed motion change nut, rotation of the motor shaft) between the motion change nut 63 and the motor shaft is changed, thereby performing linear motion. Otherwise, they are more free to rotate than reaction forces (for example, spring loads or masses of the mass) in the direction of linear motion, so they act to rotate with the motor shaft without linear motion.

In addition, a lower end portion of the switching lever 62 is provided with a return spring 64 for applying an upward force so as to be spaced apart from the movement switching nut 63 and the push rod shaft 52 when the solenoid 61 is pressed down. It is done.

In addition, the pressure block 70 is a wedge inclined surface cut in the same manner to be in close contact with the base block 71 is fixed to the housing portion so as not to move, and the wedge inclined surface 71a which is an inclined cut surface of the base block 71 ( It consists of the movement block 72 which has 72a) and is linearly moved.

At this time, the movable block 72 forms a wedge inclined surface 72a larger than the wedge inclined surface 71a of the base block 71, which is moved by the external force (the force applied by the moving adjuster). When 72 is moved, it is to move more stably with respect to the wedge inclined surface 71a of the base block 71.

Hereinafter, the operation of the present invention will be described in detail with reference to the accompanying drawings.

The electronic wedge brake (EWB) system of the present invention implements a main braking function using the power generated from one motor 13, and maintains a pad setting interval and a fail-safe function. Several additional functions, such as EPB function, move forward by switching off the solenoid 61 together with the push rod shaft 41 which is axially moved by the power transmitted from the main braking function motor 13 via the gear. By implementing a non-self-locking (NSL) type screw-coupled push rod shaft 31, only one motor 13 generating main braking power can be used, thereby reducing the overall component usage and improving the structure. There are features that can simplify it.

As shown in Fig. 1, the EWB of the present invention is mounted on the disc 5 where the wedge caliper 6 having the inner outer pad assemblies 7 and 8 rotates along with the wheels, and the electronic pedal. The wedge actuator assembly 10 controlled by the ECU 2 receiving the operation information of (1) is mounted to the housing and coupled to the side of the wedge caliper 6.

That is, the wedge actuator assembly 10 is composed of one motor 13 which is driven and controlled by the ECU 2, and as the motor rotational force is changed to the axial movement force through the linear motion conversion unit 14. Wedge structure that generates an input force to press the pad again by the self-energizing action according to the positional movement of the wedge roller 19 according to the relative behavior with respect to the pad while moving the pad portion. A wedge braking unit 16 having a is provided.

In addition, the wedge actuator assembly 10 performs an adjustment function for maintaining the pad spacing with respect to the disk 5 when the pad is worn, and the wedge braking unit 16 when the motor 13 breaks down in the braking state. A pair having a non-self-locking (NSL) type screw interlocked through the solenoid 61 and the gear coupled to the motor 13 to implement a fail-safe function of releasing the pressurization action of the motor. The moving adjuster 40 and the support adjuster 50 and a pressure block 70 for pressing the pad side in conjunction with these are provided.

In addition, when the parking is positioned between the moving adjuster 40 and the pressure block 70 to perform the EPB function, which is an electronic parking brake, and is pressurized to the maximum, the braking force is applied while supporting the reaction force due to the wedge action between the pad and the disk 5. A holding EPB spring 44 is provided.

Briefly described with reference to Figure 5 the main braking action implemented in the single motor electronic wedge brake system of the present invention having such a feature, the main braking function is that the ECU (2) is a variety of sensors in addition to the depression amount of the electronic pedal (1) As a result of analyzing the information on the driving vehicle through the driving of the motor 13, that is, the rotational force of the motor 13 is transmitted through the linear motion conversion unit 14, the linkage rod 15, and the connection rod 18. Converted to a moving force in the axial direction, the wedge moving plate 17 of the wedge braking unit 16 pushes the pad.

At this time, when the rotation direction of the motor 13 is a forward rotation, the moving wedge plate 17 constituting the wedge braking unit 16 moves away from the motor 13 in a braking situation when driving, and in the reverse rotation, the braking situation when reversing. This is the case when the wedge braking unit 16 approaches the motor 13.

The behavior of the wedge braking unit 16 that receives this axial movement force is directed toward the motor 13 as compared to the wedge base plate 20 which is stationary, as shown in FIGS. The wedge moving plate 17 coupled to the linkage rod 15 is moved, and the movement of the wedge moving plate 17 pushes the pad (inner pad assembly 7) toward the rotating disk 5. .

Then, as the wedge moving plate 17 is further advanced, the wedge roller 19 positioned on the rolling contact surfaces 17a and 20a between the wedge moving plate 17 and the wedge base plate 20 is moved in position, that is, wedge moving. Through the frictional force and the movement of the plate 17, the wedge roller 19 is moved outward from the center position of the rolling contact surface (17a, 20a) generates a wedge effect.

This wedge effect of the wedge roller 19 causes the wedge moving plate 17 to move further away from the wedge base plate 20, while canceling the reaction force toward the disc 5 while the inner pad assembly 7 causes the disc 5. ) And acts as an input force to pressurize the disk, thereby increasing the disk pressing force of the inner outer pad assemblies 7 and 8 to generate a braking force.

When braking is released in such a braking state, as shown in FIGS. 5 (d) and 5 (e), the ECU 2 reversely rotates the motor 13, and the linear motion converter 14 and the interlocking rod 15 are rotated. The wedge moving plate 17 is pulled out to return to the initial position, and the initial position return of the wedge moving plate 17 moves the wedge roller 19 to the center of the rolling contact surfaces 17a and 20a. As a result, the braking force on the disk 5 is released.

In addition, braking is performed in the same manner as in the case of forward braking even when the vehicle is braked backward, except that the motor control of the ECU 2 reverses the motor 13 (referred to as forward rotation). Therefore, since the operation as shown in Fig. 5 (bar), (g) will not be described in detail.

Meanwhile, the present invention implements both the main braking operation and the pad setting interval maintenance function, the fail-safe function, and the EPB (electronic parking brake) function, which are additional functions. ECU 2 controls the solenoid 61 which restrains and releases the motor interlocking member 45 which consists of a transmission gear, and the push rod shaft 52 which is non-self-locking type screw-coupled, It is realized through the pressing block 70 which moves to press the pad side through the rod shafts 42 and 52.

For example, maintaining the pad setting interval during the implementation of this additional function is a function that always maintains the set clearance between the pad and the disk 5 at the time of initial assembly, which is performed at every engine start or pad wear through the ECU 2. Implemented in the way it is performed upon recognition.

In this case, when the pad wear is recognized by the ECU 2, the motor 13 is driven in a situation where the ECU 2 recognizes the pad wear as compared to the method of driving the motor 13 together with the engine starting. The only difference is that all procedures are the same.

For example, when the operation for maintaining the initial set interval between the disk 5 and the pad is implemented when the engine is started, for example, when the engine is started, the ECU 2 which recognizes this starts the motor 13. As the braking action, the wedge moving plate 17 to which the connecting rod 18 is fixed is moved through the linear motion converting unit 14 and the linkage rod 15, and the wedge moving plate 17 As shown in FIGS. 6A and 6B, the inner outer pad assemblies 7 and 8 are moved to both sides of the disk 5.

As shown in FIGS. 6A and 6B, the inner outer pad assembly 7, 8 moves toward the disk 5 of the inner outer pad assembly 7, 8 as in the case of main braking. ), The ECU 2 keeps the solenoid 61 on so that the push rod shaft 52 of the adjuster 50 remains constrained. .

At this time, since the solenoid 61 is in an on state, the switching lever 62 has a motion change nut 63 and a support adjuster 50 coupled to the motor 13, as shown in FIG. Is in contact with all of the push rod shafts 52, and the rotation switching force of the motor 13 is linearly moved regardless of the rotation of the motor 13. It is switched to axial movement through the conversion unit 14.

In addition, the drive gear 46 interlocked with the motion change nut 63 also does not transmit rotational force to the push rod shaft 42 of the moving adjuster 40.

When wear of the inner outer pad assembly (7, 8) occurs when the wedge moving plate (17) is moved through the motor (13), the inner outer pad assembly (7,8) and the disk (5) Since the set interval required during main braking is exceeded, the wedge moving plate 17 is further moved by the driving force of the motor 13, and the ECU 2 switches the solenoid 61 to the off state. Will let you.

At this time, the switching of the off state of the solenoid 61 is as shown in Fig. 4 (b), the switching lever 62, the downward load of the solenoid 61 is released by the elastic force of the return spring (64) Ascending upward, release the restraint of the support adjuster 50 and form a shape in close contact with the support nut 41 of the moving adjuster 40.

When the driving gear 46 is rotated by the rotation of the motor 13 by switching the off state of the solenoid 61 as described above, and when the transmission force is transmitted to the driven gear 47, the driven gear 47 is used. As the push rod shaft 42 is rotated, the support nut 41 is axially moved, and the axial movement of the support nut 41 pushes the bearing 43 and the EPB spring 44 toward the pressure block 70. Will be pressed.

At this time, the moving block 72 constituting the pressing block 70 receives the axial movement force of the support nut 41 through the bearing 43 and the EPB spring 44, and the solenoid 61 is turned off. According to the state change, the axial movement force of the push rod shaft 52 of the support adjuster 50 in which the restraining force is released is simultaneously received.

The axial movement force of the support adjuster 50 by the push rod shaft 52 is coupled to the support nut 51 and the NSL (Non-Self Locking) type screw, so that the pressing force received from the pressure spring 54 is increased. When the push rod shaft 52 is pushed, it is realized as the push rod shaft 52 moves out of the support nut 51 while moving forward in the axial direction with rotation.

When the movable block 72 is moved in this manner, as shown in FIG. 6 (c), the movable block 72 is moved in movement along the wedge inclined surfaces 71a and 72a, which are contact surfaces between the movable block 72 and the fixed block 71. Block 72 is advanced further towards the pad.

At this time, the moving block 72 further advancing toward the pad is moved along the wedge slopes 71a and 72a, which are the contact surfaces with the fixing block 71, as shown in FIG. When the moving block 72 is moved along the inclined wedge inclined surface 71a of the block 71, the moving amount of the moving block 72 is changed by the wedge action through the inclined wedge inclined surface 72a of the moving block 72. In proportion, the moving block 72 is pushed toward the pad from the fixing block 71.

As the pad side push of the moving block 72 presses the wedge fixing plate 20, the wedge roller 19 and the wedge moving plate 17 are pushed together to the pad through the wedge fixing plate 20. This wedge moving plate 17 pushes the inner outer pad assemblies 7 and 8 to both sides of the disk 5 by the torque member action of the wedge caliper 6, thereby causing pad wear. Due to this, the state between the pad and the disk 5 in which the set retention interval is exceeded is eliminated.

Subsequently, the ECU 2 re-drives the motor 13 to readjust the wedge moving plate 17 so that the set retention clearance between the pad and the disk 5 is established, and then the solenoid 61 is turned on. After switching to the ON state, the motor 13 is rotated in reverse to switch the wedge base plate 20, the wedge roller 19, and the wedge moving plate 17 to the initial state.

This results in excessive set intervals of the inner outer pad assembly (7,8) with respect to the disk (5) due to pad wear, i.e. between the disk (5) and the inner outer pad assembly (7,8) during braking. The holding interval is switched back to the maintained state, which enables the braking force maintenance through the wedge effect of the wedge roller 19 to be implemented the same every time without braking.

In addition, the solenoid mechanism, which implements the additional function of always maintaining the pad interval at the initial set interval, has a fail-safe function, that is, when the motor 13 fails in the braking state or the wedge roller 19 When the wheel jamming occurs, the fail-safe function of releasing the pressurization of the wedge braking unit 16 is simply implemented by the ECU 2 to turn off the solenoid 61. Is implemented by switching to

That is, as the ECU 2 turns off the solenoid 61, the constraint force of the push rod shaft 52 of the support adjuster 50 of the switching lever 62 is released, and the push rod shaft 52 In the state of restraining force, the electronic wedge brake is in a fail-safe state because the wedge of the wedge roller 19 for maintaining the braking force between the pad and the disk 5 is lost because the reaction force for the braking force is not achieved. In this way, the braking is performed to prevent unwanted braking operation due to abnormal operation.

In addition, the braking maintenance during the operation of the electronic parking brake through the EWB, after the solenoid 61 is switched off, the moving adjuster 40 pushes the moving block 72 while compressing the EPB spring 44 as much as possible. Accordingly, the EPB spring 44 is implemented by supporting the moving block 72 while withstanding the reaction force of the pad side according to the braking force, the parking braking force is relatively weak compared to the main braking force, so the parking braking state is maintained. It is done.

1 is a block diagram of an additional function implementation type single motor electronic wedge brake system by the solenoid and the motor interlock according to the present invention

Figure 2 (a), (b) is a detailed configuration diagram of an additional function implementation type single motor electronic wedge brake system by the solenoid and the motor interlock according to FIG.

Figure 3 is a block diagram for adjusting the pad setting intervals as an additional function through the solenoid and the motor in accordance with the present invention

Figure 4 (a), (b) is an operating state diagram of the solenoid according to the present invention

Figure 5 is a state diagram of the wedge operation during the main braking of the single motor type electronic wedge brake system according to the present invention

6 (a) to (c) is an operation diagram for maintaining the pad setting interval of the adjusting unit during the main braking of the single motor type electronic wedge brake system according to the present invention

    <Description of the symbols for the main parts of the drawings>

1: electronic pedal 2: ECU

3: yaw moment sensor 4: auxiliary battery

5: disk

6: Wedge Caliper 7,8: Inner Outer Pad Assembly

10: wedge actuator assembly

11 braking motor unit 13 motor

14: linear motion conversion unit 15: linkage rod

15a: connection plate

16: wedge braking unit 17: wedge moving plate

17a, 20a: rolling contact surface 18: connecting rod

19: wedge roller 20: wedge base plate

30: Adjusting unit 40: Moving adjuster

41,51: support nut 42,52: push rod shaft

43,53: Bearing 44: EPB Spring

45: motor linking member 46: drive gear

47: driven gear 50: support adjuster

54 pressure spring 60 solenoid unit

61: solenoid 62: switching lever

63: motion conversion nut 64: return spring

70: press block 71: base block

71a, 72a: wedge slope 72: moving block

Claims (10)

The rotational force generated by the one motor 13 driven by the ECU 2 generating the control signal according to the braking using the operation signal of the electronic pedal 1 and the information measured in the vehicle is the linear motion change unit 14. Is converted into axial motion through The inner outer pad assembly (7,8) is brought into close contact with the disc wrapped in the wedge caliper (6), and self-energizing through the wedge phenomenon due to the positional movement of the wedge roller (19) having a diameter. In a single-motor electronic wedge brake system which multiplies the braking force by the pressing force on the disk Connected to one motor 13 controlled by the ECU 2, the solenoid mic for maintaining additional pad setting intervals and for implementing additional functions such as a fail-safe function and an electronic parking brake (EPB) function. Solenoid Mechanism, Press block 70 in contact with the wedge base plate 20 located opposite the wedge roller 19 located on the rolling contact surface 17a of the wedge moving plate 17 for pressing the inner pad assembly 7. and, A movement adjuster 40 which is axially moved by receiving the power of the motor 13 via a motor interlocking member 45 made of gears and pushes the pressure block 70, Located in the bottom portion of the moving adjuster 40, the side of the pressing block 70 by the axial movement force generated through the pressing force of the pressing spring 54 as the NSL (Non-Self Locking) type screw is coupled Support adjuster 50 for pressurizing, As it is turned on and off through the ECU 2, the solenoid unit 80 is brought into contact to restrain or release the shaft portion of the motor 13, the moving adjuster 40 and the support adjuster 50. ) And EPB spring 44 positioned between the moving adjuster 40 and the pressure block 70 to perform the EPB function, which is an electronic parking brake when parking. Single-function electronic wedge brake system with solenoid and motor-driven add-on, characterized in that consisting of. The method according to claim 1, wherein the movement adjuster 40 is coupled to the push rod shaft 42 coupled to the housing portion while being screwed to the support nut 41 which is axially moved with rotation, and coupled to the rotation shaft of the motor 13 And a motor interlocking member 45 for transmitting the rotational force of the motor 13 toward the push rod shaft 42, a thrust bearing 43 coupled to the end of the push rod shaft 42, and the bearing ( 43. A single motor electronic wedge brake system with a solenoid and motor interlock, characterized in that it is composed of an EPB spring (44) which is fixed to the end and maintains the restraining force during parking braking. The method according to claim 2, wherein the motor interlocking member 45 is coupled to the rotary shaft of the motor 13, the drive gear 46 rotates with the motor 13, and through the rotational power transmitted from the drive gear 46 Single-function electronic wedge brake system with solenoid and motor linkage, characterized in that it consists of a driven gear 47 coupled to the push rod shaft 42 to rotate the push rod shaft 42. 4. The single motor electronic wedge brake system according to claim 3, wherein the drive gear (46) and the driven gear (47) are made of a bevel gear type. The push rod shaft 52 of claim 2, wherein the support adjuster 50 is screwed to the support nut 51 coupled to the housing, and the push rod shaft 52 is moved in the axial direction when the binding force of the solenoid 61 is released. Thrust bearings 53 coupled to the ends of the shafts 52 and pressure springs 54, one end of which is secured to the housing portion and the other end of which is assembled in an initial state to exert a continuous axial force towards the bearings 53. Single-function electronic wedge brake system with solenoid and motor function. The push rod shaft 52 and the support nut 51 are non-self-locking (NSL) type screws having a large lead angle. Type single motor electronic wedge brake system. The solenoid unit 60 of claim 1 is provided with a solenoid 61 that is turned on and off through an ECU 2, and a shaft that is pulled out and drawn in during operation of the solenoid 61. When the switching lever 62 is in motion, the rotational force of the motor 13 is switched to the axial movement through the linear motion conversion unit 14 when the switching lever 62 is in contact with the switching lever 62 and the switching lever. It is provided with a lower end of the 62, the return spring 64 for applying an upward force so as to be spaced apart from the movement switching nut 63 and the push rod shaft 52 when the pressing force of the solenoid 61 is released. Single-function electronic wedge brake system with solenoid and motors for additional functions. The method according to claim 7, wherein the switching lever 62 is moved downward when the solenoid 61 is pressed upwards, the upper part is in close contact with the movement switching nut 63 provided on the motor 13 side. , The lower end thereof comes into close contact with the push rod shaft 52 of the support adjuster 50, and when the downward load of the solenoid 61 is released, the lower end part comes into close contact with the support nut 41 of the moving adjuster 40. Single-function electronic wedge brake system with a solenoid and a motor-driven interlock, characterized in that the shape is formed. The method according to claim 1, wherein the pressure block 70 is cut in the same way to be in close contact with the base block 71 is fixed to the housing portion so as not to move, and the wedge inclined surface 71a which is an inclined cutting surface of the base block 71. Single-function electronic wedge brake system with a solenoid and motor linkage, characterized in that it consists of a moving block (72) having a wedge slope (72a) and moving linearly. The method of claim 9, wherein the movable block 72 forms a wedge inclined surface 72a that is larger than the wedge inclined surface 71a of the base block 71. Motor electronic wedge brake system.

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