KR20110103678A - Electro wedge brake device for vehicle - Google Patents

Abstract

The present invention relates to an electronic wedge brake device for an automobile, and can not only basically implement a normal braking function, an automatic gap adjustment function and a fail safe function between the disk 51 and the brake pad 52, It is further provided with a configuration capable of generating an emergency braking force in case of an emergency situation in which a braking force cannot be generated by the power of the motor 54.
The electronic wedge brake device for automobiles of the present invention for achieving this is combined with the shaft 55 of the motor 54 which is driven by the control of the electronic control unit 53 so that the shaft (when the shaft 55 rotates). A linear movement block 56 moving along the lengthwise direction of 55; Coupled to the brake pad 52 for pressing the disk 51 to contact the brake pad 52 with the disk 51 or the disk 51 in accordance with the movement of the linear movement block 56. A wedge unit (60) contacting and shorting the brake pads (52);
A screw 70 installed in a state spaced apart from the side of the wedge unit 60 in a direction orthogonal to the brake pad 52 and having a latch 71 integrally coupled to an outer circumferential surface thereof; It is installed to be in contact with the wedge unit 60 while being coupled to one end of the screw 70 to be freely rotatable, the rotation is selectively restrained by the control of the electronic control unit 53, the electronic control unit 53 Emergency braking unit (80) for forcibly moving the wedge unit (60) toward the disk (51) so that the emergency braking force is generated while moving along the screw (70) when the restraint by the control of; It is coupled to the other end of the screw 70 to enable free rotation of the screw 70, selectively restrains the rotation of the screw 70 by the control of the electronic control unit 53, the electronic control Adjust to implement the automatic clearance adjustment function and fail safe function between the disk 51 and the brake pad 52 by moving the screw 70 at the time of restraining by the control of the unit 53. Unit 90; is configured to include.

Description

Electronic wedge brake device for vehicle {Electro wedge brake device for vehicle}

The present invention relates to an electronic wedge brake device for an automobile having an emergency braking function.

In general, a brake device that generates a braking force using hydraulic pressure has a disadvantage in that the configuration is complicated by the use of various hydraulic mechanisms, as well as the deterioration in reliability and stability of the braking performance according to the hydraulic use.

This has led to the development of the Electro Wedge Brake (EWB), which brings the simplicity of the hydraulic brakes to a lesser extent, and enables the optimum implementation of the reliability and responsiveness of braking performance, and furthermore, integrated chassis control. The application is gradually increasing and trending.

Meanwhile, a configuration of a conventional electronic wedge brake device using a solenoid is briefly illustrated in FIG. 1, which has been described in detail through Patent Registration No. 10-0879890 to which the applicant has applied for a patent. .

As shown, a wedge unit 3 is coupled to a brake pad 2 that presses both sides of the disk 1 to generate a braking force by friction, and the wedge unit 3 is connected to the brake pad 2. Combination of the movable plate 4, the base plate 5 installed spaced apart from the movable plate 4, the wedge roller 6 interposed between the movable plate 4 and the base plate (5) In the configuration, the movable plate (4) and the base plate (5) is formed with a thread-shaped operating surface (4a, 5a), respectively, the wedge roller (6) is inserted into the operating surface (4a, 5a) It is a structure installed to enable cloud movement.

An adjust unit 7 is connected to the base plate 5, and the adjust unit 7 is screwed to the push rod 8 and the push rod 8 installed in close contact with the base plate 5. The support nut 9, the push rod 8 and the support nut 9 are installed so that both ends are supported to adjust the push rod 8 toward the base plate 5 toward the adjust spring 10. Consists of.

The push rod 8 consists of a head 8a and a screw shaft 8b, of which a latch 8c is integrally formed on the head 8a.

The screw shaft 8b is screwed so as to rotate freely with respect to the support nut 9, and the push rod 8 rotates by the force of the adjust spring 10 while the base plate ( 5) It is a structure that can be moved straight toward.

In order to restrain the free rotation of the push rod (8), the latch (8c) is coupled to the switch lever 11 in a detachable screwing manner, the switch lever 11 is operated by the solenoid 12 It becomes the structure that becomes.

That is, when the solenoid 12 is ON, the switch lever 11 is maintained in the engaged state with the latch 8c, and when the solenoid 12 is OFF, the switch lever 11 is in a state of being separated from the latch 8c.

The solenoid 12 is operated by the control of the electronic control unit 13 (hereinafter referred to as ECU).

In addition, the movable plate 4 is coupled to the linear movement block 16 through the connecting rod 14 and the interlocking rod 15, the linear movement block 16 is the shaft 18 of the motor 17 And screwed together, the motor 17 is driven to rotate the shaft 18, the linear movement block 16 along the longitudinal direction of the shaft 18 in accordance with the rotation direction of the shaft 18 It is a structure that moves linearly.

The motor 17 is operated by the control of the ECU 13.

Meanwhile, the support nut 9, the solenoid 12, and the motor 17 are installed in a fixed state in a housing (not shown), and the housing is coupled to and fixed to one side of a wedge caliper (not shown). Structure.

The conventional electronic wedge brake device configured as described above has a normal braking function, an automatic gap adjustment function between the disc and the brake pad, and a brake pad that is pressed onto the disc during braking to be forcibly dropped when the brake pad does not drop from the disc after the braking is completed. You can implement fail safe functionality.

That is, in the normal braking function, when the brake pedal is pressed, the motor 17 rotates under the control of the ECU 13, the linear movement block 16 moves linearly along the motor shaft 18, and the interlocking rod 15 And the connecting rod 14 and the moving plate 4 move together in the same direction. When the movable plate 4 is moved, the movable plate 4 and the brake pad 2 are moved to the side of the disk 1 by the operating surfaces 4a and 5a and the wedge rollers 6 having a thread shape. As the pressure is brought into contact with the side surface of the disc 1, a braking force is generated by frictional force, thereby normal braking is achieved.

When the gap between the disc 1 and the brake pad 2 becomes larger than the pre-wear state (initial state) of the brake pad 2 due to the wear of the brake pad 2, the disc 1 and the brake 1 The gap between the brake pads 2 is automatically adjusted to the initial state.

That is, in the initial state before the brake pad 2 is worn out, when the motor 17 rotates by the rotational speed of R1, the brake pad 2 is pressed onto the disk 1 to brake. However, when the brake pad 2 is worn and the gap is widened, the brake pad 2 does not come into contact with the disk 1 even if the motor 17 rotates by the rotational speed of R1, thereby preventing the braking force.

Accordingly, the ECU 13 recognizes the situation and operates the solenoid 12 together with the motor 17 to depress the brake pedal during braking to separate the switch lever 11 from the latch 8c. When the switch lever 11 is separated, the screw shaft 8b is freely rotated with respect to the support nut 9 by the force of the adjuster spring 10, and thus the push rod 8 is removed from the support nut 9. As it protrudes, the base plate 5 is pressed against the disk 1. When the base plate 5 is moved toward the disc 1 by the pressing force of the push rod 8, the wedge roller 6, the moving plate 4, and the brake pad 2 are moved together. The brake pad 2 is pressed against the side of the disk 1 to generate a braking force by the friction force.

In other words, when the motor 17 is rotated by the number of revolutions of R1, the adjust unit 7 forcibly moves the brake pad 2 by the gap generated by the wear of the brake pad 2 so that the disk 1 Contact with. The movement of the push rod 8 protruding from the support nut 9 is fixed by the engagement of the latch 8c and the switch lever 11 by the solenoid 12 operating under the control of the ECU 13. Therefore, even when the brake pad 2 is separated from the disk 1 after the braking is completed, the clearance between the disk 1 and the brake pad 2 remains the same as the initial state before the wear of the brake pad 2. In the next operation, even when the motor 17 rotates by the number of revolutions of R1, the brake pad 2 is compressed to the disk 1 to perform normal braking.

In addition, a phenomenon may occur in which the brake pad 2, which has been pressed on the disk 1, does not fall off from the disk 1 after the braking is completed, which is caused by a failure of the motor 17 or jamming of the wedge roller 6 jamming).

In this case, the ECU 13 recognizes the situation and operates the solenoid 12 to separate the switch lever 11 from the latch 8c. On the other hand, since the brake pad 2, which is in contact with the side of the disk 1 and presses the disk 1, is always reacted by the disk 1, the switch lever 11 is detached from the latch 8c as described above. The brake pad 2 and the wedge unit 3 move away from the side of the disk 1 by the reaction force of the disk 1 (because the reaction force by the disk is larger than the force of the adjust spring). Wedge unit moves smoothly). Then, the push rod 8 is retracted and inserted into the support nut 9 while rotating and winning the force of the adjust spring 10, thereby causing the brake pad 2 to be forcibly separated from the disk 1. This makes it possible to implement fail safe functionality.

However, in the conventional electronic wedge brake device as described above, the operating force is increased due to the failure of the motor 17, the linear movement block 16 or the interlocking rod 15 and the connecting rod 14, or the failure of the operation rod. If it is not transmitted smoothly to 4), there is a disadvantage that sufficient braking friction force does not occur between the disc 1 and the brake pad 2, and as a result there is a risk of causing an accident.

Accordingly, the present invention has been made in order to solve the above problems, when the situation that can not generate a braking force by the power of the motor can be equipped with a configuration that can proceed to the emergency braking situation, the vehicle for improved stability It is an object of the present invention to provide an electronic wedge brake device.

Electronic wedge brake device for automobiles according to the present invention for achieving the above object is a linear movement block coupled to the shaft of the motor driven by the control of the electronic control unit to move along the longitudinal direction of the shaft when the shaft rotates. and; A wedge unit coupled to the brake pad for pressing the disk to contact the brake pad with the disk or short-circuit the brake pad in contact with the disk according to the movement of the linear movement block; A screw installed in a state spaced apart from the side of the wedge unit in a direction orthogonal to the brake pad, and having a latch integrally coupled to an outer circumferential surface thereof; It is coupled to one end of the screw so as to be freely rotatable and installed to contact the wedge unit, the rotation is selectively constrained by the control of the electronic control unit, the release of the restraint by the control of the electronic control unit along the screw An emergency braking unit for forcibly moving the wedge unit toward the disk to generate an emergency braking force while moving; Coupled to the other end of the screw to enable free rotation of the screw, selectively restrain the rotation of the screw by the control of the electronic control unit, and move the screw upon release of the control by the control of the electronic control unit. And an adjust unit that implements an automatic gap adjustment function and a fail safe function between the disk and the brake pad.

Here, the latch is characterized in that coupled to the longitudinal intermediate position of the screw.

The wedge unit may include: a movable plate installed to move along a radial direction of the disk in conjunction with the linear movement block while one surface is coupled to the brake pad and a threaded operation surface is formed on the other surface; A base plate having a threaded operation surface formed on one surface facing the moving plate and having the other surface in contact with the emergency braking unit; And a wedge roller installed between the operating surface of the movable plate and the operating surface of the base plate to move in rolling motion according to the movement of the movable plate.

The emergency braking unit includes: an emergency braking nut which is coupled to one end of the screw so as to be freely rotatable and is in contact with the base plate and has a gear groove formed along an outer circumferential surface thereof; An emergency braking spring installed at both ends of the emergency braking nut and the latch to provide a force for pressing the emergency braking nut toward the base plate; An emergency braking solenoid operated by the control of the electronic control unit; An emergency braking lever installed at one end of the housing coupled to the wedge caliper so as to be rotatable via a hinge, the other end of which is connected to the emergency braking solenoid; One end is coupled to the emergency braking lever, and the other end has a gear groove that is engaged with the gear groove of the emergency braking nut by meshing with the gear groove of the emergency braking nut according to the rotation of the emergency braking nut. Or an emergency braking stopper operative to achieve or release the coupling.

The adjust unit may include: a support nut fixed to the housing while being screwed to the other end of the screw to allow free rotation of the screw; An adjust spring provided at both ends of the support nut and the latch to provide elastic force to the latch in a direction in which the screw protrudes from the support nut; An adjust solenoid operated by the control of the electronic control unit; An adjuster installed on the housing such that one end is rotatably installed through a hinge and the other end is connected to the adjust solenoid; One end is coupled to the adjuster lever and the other end is provided with a gear groove for engaging the latch and the gear is engaged with the gear to be engaged or engaged to be engaged with the latch in accordance with the rotation of the adjuster Just stopper; characterized in that consisting of.

And, the emergency braking spring is characterized in that it is formed to have a greater elastic force than the adjust spring.

The electronic wedge brake apparatus according to the present invention can basically implement the normal braking function, the automatic gap adjustment function between the disk 51 and the brake pad 52, and the fail safe function, as well as the motor 54. Equipped with a configuration that can generate an emergency braking force in the event of an emergency that does not generate a braking force by the power of), thereby maximizing safety.

1 is a configuration diagram for explaining a conventional electronic wedge brake device for a vehicle,
2 is a block diagram illustrating an electronic wedge brake device for an automobile having an emergency braking function according to the present invention.

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

The electronic wedge brake device for a vehicle according to the present invention is installed at intervals between the disk 51 rotating together with the wheel and the disk 51 on both sides of the disk 51 as shown in FIG. 2. Combined with the brake pad 52 and the shaft 55 of the motor 54 driven by the control of the ECU 53 to move along the longitudinal direction of the shaft 55 when the shaft 55 rotates. Coupled to the linear movement block 56 and the brake pad 52 to contact the brake pad 52 with the disk 51 according to the movement of the linear movement block 56 or the disk 51. Wedge unit 60 for contact short-circuit of the brake pad 52 in contact with the brake pad, and the outer peripheral surface while being spaced apart from the side of the wedge unit 60 in a direction orthogonal to the brake pad 52 Screw (70) having a latch (71) integrally coupled thereto; It is installed to be in contact with the wedge unit 60 while being coupled to the rotatable one end freely and the rotation is selectively restrained by the control of the electronic control unit 53 and the control of the electronic control unit 53. Emergency braking unit 80 and the other end of the screw 70 forcibly moving the wedge unit 60 toward the disk 51 so that the emergency braking force is generated while moving along the screw 70 when the restraint is released by the screw 70. Is coupled to enable the free rotation of the screw 70, and selectively restrain the rotation of the screw 70 by the control of the electronic control unit 53 and restrained by the control of the electronic control unit 53 Adjust unit to move the screw 70 to release the automatic clearance adjustment function between the disk 51 and the brake pad 52 and fail safe function It is configured to include a 90.

Here, the latch 71 is connected to the intermediate position in the longitudinal direction of the screw 70 in principle, but is not limited thereto.

The wedge unit 60 has one surface coupled to the brake pad 52 and a threaded operating surface 61a formed on the other surface thereof, and interlocked with the linear movement block 61 to adjust the radial direction of the disk 51. A base plate installed so that the movable plate 61 and the movable plate 61 provided to move along the movable plate 61 and the operating surface 62a having a thread shape on one surface facing the movable plate 61 and the other surface is in contact with the adjust unit 70 ( 62 and a wedge roller which is inserted between the operating surface 61a of the movable plate 61 and the operating surface 62a of the base plate 62 to perform rolling motion according to the movement of the movable plate 61. 63).

Here, the front movement block 56 and the movable plate 61 is a structure that is connected to the power transmission through the interlocking rod 64 and the connecting rod 65, the front movement block 56 and the movement It is not necessary to use two rods 64 and 65 for the connection of the plate 61, and one or other link mechanisms may be used as necessary.

The emergency braking unit 80 is installed to contact the base plate 62 while being coupled to one end of the screw 70 to be freely rotatable, and an emergency braking nut having a gear groove 81a formed along an outer circumferential surface thereof. 81 and an emergency braking spring 82 provided at both ends of the emergency braking nut 81 and the latch 71 to provide a force for pressing the emergency braking nut 81 toward the base plate 62. ), An emergency braking solenoid 83 operated by the control of the electronic control unit 53, and the other end rotatably installed via a hinge 84a on the housing 66 coupled to the wedge caliper. An emergency braking lever 84 installed to be connected to the emergency braking solenoid 83, one end is coupled to the emergency braking lever 84, and the other end is engaged with the gear groove 81a of the emergency braking nut 81. Combined with Composed of an emergency braking stopper 85 having an groove to engage with or engage with the gear groove 81a of the emergency braking nut 81 according to the rotation of the emergency braking lever 84. do.

Here, the screw 70 and the emergency braking nut 81 are coupled to each other by a screw coupling method, while the emergency braking nut 81 rotates smoothly in one direction by the force of the emergency braking spring 82. It can move toward the base plate 62 along the screw 70, this structure is referred to as non-self locking.

The adjust unit 90 is screwed to the other end of the screw 70 so as to allow free rotation of the screw 70, and a support nut 91 fixedly installed to the housing 66 and the support nut 91. And a spring (92) installed at both ends of the latch (71) to provide elastic force to the latch (71) in the direction in which the screw (70) protrudes from the support nut (91), and An adjust solenoid 93 operated by the control of the electronic control unit 53 and one end of the adjust solenoid 93 rotatably installed in the housing 66 via a hinge 94a, and the other end of the adjust solenoid 93 The adjuster 94 is installed to be connected, and one end is coupled to the adjuster 94 and the other end has a gear groove coupled to the latch 71 and the gear is engaged with the adjuster 94 With the latch 71 in accordance with the rotation It consists of an adjust stopper 95 that engages to engage or disengage to engage.

In addition, the present invention is a configuration in which the elastic force of the emergency braking spring 82 is set to be larger than the elastic force of the adjust spring 92, but is preferably configured to have a large elastic force of 3 to 5 times larger. It is not limited.

In the housing 66, the motor 54, the emergency braking solenoid 83, and the adjust solenoid 93 are also fixedly installed.

On the other hand, although the screw 70 and the support nut 91 are coupled to each other by a screw fastening method, the screw 70 protrudes from the support nut 91 while smoothly rotating with respect to the support nut 91. It has a non-self locking structure that can move in the direction and the direction inserted into the support nut (91).

Hereinafter, the operation of the electronic wedge brake device according to the present invention will be described.

First, the electronic wedge brake device according to the present invention can perform a normal braking function.

That is, when the brake pedal is pressed, the motor 54 rotates under the control of the ECU 53, the linear movement block 56 linearly moves along the motor shaft 55, and the linkage rod 64 and the connecting rod ( 65) and the moving plate 61 move together in the same direction.

When the movable plate 61 is moved, the movable plate 61 and the brake pad 52 are moved to the side of the disk 51 by the operating surfaces 61a and 62a and the wedge roller 63 formed in a thread shape. As the pressure is brought into contact with the side surface of the disk 51, a braking force is generated by the friction force, thereby normal braking is achieved.

In addition, the electronic wedge brake apparatus according to the present invention may perform an automatic gap adjustment function between the disk 51 and the brake pad 52.

In other words, when the gap between the disc 51 and the brake pad 52 becomes larger than the pre-wear state (initial state) of the brake pad 52 due to the wear of the brake pad 52, the disc 51 at the time of braking And the gap between the brake pad 52 is automatically adjusted to the initial state.

That is, in the initial state before the brake pad 52 is worn out, when the motor 54 rotates by the rotational speed of R1, the brake pad 52 is compressed to the disk 51 to brake.

However, when the brake pad 52 is worn and the gap is widened, the brake pad 52 does not come into contact with the disc 51 and thus does not generate a braking force even if the motor 54 rotates by the rotational speed of R1.

Therefore, when the ECU 53 recognizes the situation and presses the brake pedal during braking, the ECU 53 rotates the adjust lever 94 by operating the adjust solenoid 93 together with the motor 54. The adjust stopper 95 is separated from the latch 71.

Then, the screw 70 coupled with the latch 71 is freely rotated with respect to the support nut 91 by the force of the adjust spring 92 to protrude from the support nut 91, and the screw ( The emergency braking nut 81 is also moved by the movement of the 70 so that the emergency braking nut 81 presses the base plate 62 toward the disc 51.

When the base plate 62 is pressed against the disk 51, the base plate 62, the wedge roller 66, the movable plate 61, and the brake pad 52 move together. The brake pads 52 come into contact with the side surfaces of the disk 51 to generate braking force due to friction.

In other words, when the motor 54 is rotated by the number of revolutions of R1, the adjust unit 90 forcibly moves the brake pad 52 by the gap generated by the wear of the brake pad 52 so that the disk 51 is rotated. Contact with.

In addition, the movement of the screw 70 protruding from the support nut 92 causes the adjust stopper 95 to engage with the latch 71 by the adjust solenoid 93 which operates under the control of the ECU 53. It is fixed.

Therefore, even if the brake pad 52 is separated from the disk 51 after the braking is completed, the gap between the disk 51 and the brake pad 52 is kept the same as the initial state which is the state before the wear of the brake pad 52. In the next operation, even when the motor 53 is rotated by the number of revolutions of R1, the brake pad 52 is squeezed by the disk 51 to perform normal braking.

In addition, the electronic wedge brake device according to the present invention has a fail safe function that forces the brake pad 52 that is pressed onto the disk 51 when braking does not fall off the disk 51 after the braking is completed. Can be implemented.

That is, the brake pad 52, which was pressed on the disk 51 during braking, may not fall from the disk 51 after the braking is completed. This may be caused by a failure of the motor 53 or jamming of the wedge roller 66. jamming).

In this case, the ECU 53 recognizes the situation and operates the adjust solenoid 93 so that the adjust stopper 95 is separated from the latch 71.

On the other hand, since the brake pad 52, which is in contact with the side surface of the disk 51 and presses the disk 51, is always under reaction from the disk 51, the adjust stopper 95 latches as described above. When separated from the 71, the brake pad 52 and the wedge unit 60 are moved away from the side surface of the disk 51 by the reaction force of the disk 51 (the reaction force by the disk is adjust spring The wedge unit will move smoothly because it is larger than.

Then, the screw 70 is retracted and inserted into the support nut 91 while rotating and winning the force of the adjust spring 92, thereby causing the brake pad 52 to be forcibly separated from the disk 51. This will allow us to implement fail safe functionality.

In addition, the electronic wedge brake apparatus according to the present invention has a function of generating an emergency braking force when a situation in which braking force cannot be generated by the power of the motor 54 during braking occurs.

That is, even when the brake pedal is pressed in the braking situation, the operating force is moved by the failure of the motor 53, the linear movement block 56 or the interlocking rod 64 and the connecting rod 65, or the malfunction of the moving plate 61. If it is not transmitted smoothly), there is no sufficient braking friction force between the disk 51 and the brake pad 52, resulting in a risk of accident.

In this case, the ECU 53 recognizes the situation and operates the emergency braking solenoid 83 to rotate the emergency braking lever 84. Accordingly, the emergency braking stopper 85 of the emergency braking nut 81 It is separated from the gear groove 81a.

Then, the emergency braking nut 81 is freely rotated in one direction with respect to the screw 70 by the force of the emergency braking spring 82 to move along the screw 70 to move the base plate 62 to the disk 51. To the side.

When the base plate 62 is pressed against the disk 51, the base plate 62, the wedge roller 66, the movable plate 61, and the brake pad 52 move together. As the brake pad 52 is pressed against the side of the disk 51, an emergency braking force is generated by the friction force.

In other words, when the brake pad 52 cannot be crimped to the side surface of the disk 51 by the power of the motor 54 during braking, the emergency braking unit 80 is controlled by the ECU 53. ) Is operated, whereby the brake pad 52 is forcibly moved to contact and press the side of the disk 51 to generate an emergency braking force due to frictional force.

As described above, the electronic wedge brake device according to the present invention can basically implement a normal braking function, an automatic gap adjustment function and a fail safe function between the disk 51 and the brake pad 52, It is further provided with a configuration that can generate an emergency braking force when an emergency situation that does not generate a braking force by the power of the motor 54, there is an advantage to maximize the safety.

51-Disc 52-Brake Pads
53-electronic control unit (ECU) 54-motor
56-linear motion block 60-wedge unit
70-Screw 80-Emergency Braking Unit
90-Adjust Unit

Claims (6)

The linear movement block 56 coupled with the shaft 55 of the motor 54 driven by the control of the electronic control unit 53 and moving along the longitudinal direction of the shaft 55 when the shaft 55 rotates. )and;
Coupled to the brake pad 52 for pressing the disk 51 to contact the brake pad 52 with the disk 51 or the disk 51 in accordance with the movement of the linear movement block 56. A wedge unit (60) contacting and shorting the brake pads (52);
A screw 70 installed in a state spaced apart from the side of the wedge unit 60 in a direction orthogonal to the brake pad 52 and having a latch 71 integrally coupled to an outer circumferential surface thereof;
It is installed to be in contact with the wedge unit 60 while being coupled to one end of the screw 70 to be freely rotatable, the rotation is selectively restrained by the control of the electronic control unit 53, the electronic control unit 53 Emergency braking unit (80) for forcibly moving the wedge unit (60) toward the disk (51) so that the emergency braking force is generated while moving along the screw (70) when the restraint by the control of;
It is coupled to the other end of the screw 70 to enable free rotation of the screw 70, selectively restrains the rotation of the screw 70 by the control of the electronic control unit 53, the electronic control Adjust to implement the automatic clearance adjustment function and fail safe function between the disk 51 and the brake pad 52 by moving the screw 70 at the time of restraining by the control of the unit 53. Unit 90;
Electronic wedge brake device for automobile comprising a. The method of claim 1, wherein the latch (71) is coupled to the longitudinal intermediate position of the screw (70);
Electronic wedge brake device for automobiles, characterized in that. The method of claim 1, wherein the wedge unit 60,
One surface is coupled to the brake pad 51 and threaded operation surfaces 61a and 62a are formed on the other surface thereof, and interlocked with the linear movement block 56 to move along the radial direction of the disk 51. A moving plate 61;
A base plate 62 formed with a threaded operation surface 61a, 62a on one surface facing the movable plate 61, the other surface being in contact with the emergency braking unit 80;
A wedge roller (63) installed between the operating surface (61a) of the movable plate (61) and the operating surface (62a) of the base plate (62) to move in rolling motion as the movable plate (61) moves;
Electronic wedge brake device for cars, characterized in that consisting of. The method of claim 2, wherein the emergency braking unit 80,
An emergency braking nut 81 coupled to one end of the screw 70 so as to be freely rotatable and in contact with the base plate 62 and having a gear groove 81a formed along an outer circumferential surface thereof;
An emergency braking spring (82) installed at both ends of the emergency braking nut (81) and the latch (71) to provide a force for pressing the emergency braking nut (81) toward the base plate (62);
An emergency braking solenoid 83 operated by the control of the electronic control unit 53;
An emergency braking lever 84 having one end rotatably installed on the housing 66 coupled to the wedge caliper and connected to the emergency braking solenoid 83 at the other end thereof;
One end is coupled to the emergency braking lever 84 and the other end is provided with a gear groove coupled with a gear groove 81a of the emergency braking nut 81 in engagement with each other according to the rotation of the emergency braking lever 84. An emergency braking stopper 85 that engages with or engages with the gear groove 81a of the emergency braking nut 81;
Electronic wedge brake device for cars, characterized in that consisting of. The method of claim 4, wherein the adjust unit 90,
A support nut 91 screwed to the other end of the screw 70 so as to allow free rotation of the screw 70 and fixedly installed to the housing 66;
An adjuster spring is installed to support both ends of the support nut 91 and the latch 71 so as to provide elastic force to the latch 71 in a direction in which the screw 70 protrudes from the support nut 91. 92);
An adjust solenoid (93) operated by the control of the electronic control unit (53);
An adjuster (94) installed at one end of the housing (66) to be rotatable via a hinge (94a), the other end of which is connected to the adjust solenoid (93);
One end is coupled to the adjuster 94 and the other end is provided with a gear groove to which the latch 71 and the gear are engaged to engage with the latch 71 according to the rotation of the adjuster 94. An adjust stopper 95 operative to engage or disengage;
Electronic wedge brake device for cars, characterized in that consisting of. The method according to claim 5, wherein the emergency braking spring (82) is formed to have a greater elastic force than the adjust spring (92);
Electronic wedge brake device for automobiles, characterized in that.

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