KR20090061180A

KR20090061180A - Roll in ramp typed electric mechanical brake system

Info

Publication number: KR20090061180A
Application number: KR1020070128080A
Authority: KR
Inventors: 박동일; 조원봉
Original assignee: 현대모비스 주식회사
Priority date: 2007-12-11
Filing date: 2007-12-11
Publication date: 2009-06-16

Abstract

A roller-in-ramp typed electric mechanical brake system is provided to adjust an interval between wheel disks according to the abrasion of inner and outer pads by using a spindle member. A roller-in-ramp typed electric brake system comprises an self-energizing actuator assembly, which pressurizes an inner and outer pad(3,4) toward a wheel disk(D) by the medium of the power generated in a motor(6). The actuator assembly is equipped with a spindle which moves toward an axis. The actuator assembly consists of: a spindle member(7) to adjust the interval of the wheel disks according to the abrasion of an inner and outer pad; and an RIR(roll in ramp) member(10) to energize the torque of the motor. The RIR member converts the torque of the motor into linear locomotion.

Description

Roll In Ramp typed Electric mechanical Brake System

The present invention relates to a brake of a vehicle, and more particularly to a roller-in-lamp type electric brake system.

In general, a brake system (Brake System) is a braking device that is used to maintain a parking state while at the same time decelerating or stopping a driving car.

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 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 is a certain limitation to the stability enhancement, etc. There is a vulnerability.

Accordingly, it uses the EMB (Electro mechanical Brake), which brings the simplicity of the configuration that the hydraulic brake does not have and can enhance the reliability of the braking performance, which uses the motor driving force as the disc braking force to obtain a strong motor force. Typically, 42V high voltage motors are used.

However, the EMB can only use a 42V high voltage motor by using the motor driving force as the disk braking force, which increases the cost of applying the high voltage motor as the size of the EMB increases.

Accordingly, the present invention has been invented in view of the above, and has a self-energizing effect by ramping using a roller in ramp to power the motor. Therefore, it implements Electro Mechanical Brake (EMB), which can generate sufficient braking force and reduce the size even with a motor using a voltage of 12V, as well as separate additional functions such as maintaining pad setting intervals. Since it can be implemented without using (Solenoid), the purpose is to reduce the overall number of components, cost and weight.

The present invention for achieving the above object, the electric brake system when the ECU detects a signal of the electronic pedal, ECU for generating a control signal for braking together with the measurement information on the vehicle driving state;

A caliper assembly provided with an inner outer pad provided inwardly of the caliper body to pressurize and brake the shock disk;

During braking, the power generated by the motor controlled by the ECU 1 is multiplied by a linear movement force through a ramping action to press the pad toward the wheel disk and to perform additional functions such as maintaining a pad setting interval. An actuator assembly having an axially moved spindle;

Characterized in that consisting of.

To this end, the actuator assembly is a motor (1) controlled by the ECU for generating a rotational force for braking;

The caliper body is screwed to a spindle shaft having one end coupled to the motor to receive the rotational force of the motor, and a screw portion formed on the spindle shaft to adjust the distance between the shaft and the shaft as the spindle shaft moves out or enters through the rotation of the spindle shaft. A spindle member consisting of a piston coupled with;

An output lamp coupled to and fixed to a rotational shaft of the motor and rotated through rotation of the motor, and an output lamp that is linearly moved by engaging and fixing an inner pad portion while being coupled corresponding to the input lamp The roll in ramp (RIR) member is constituted by a roller that reinforces a linear movement force for pushing the output lamp toward the wheel disk through the positional movement with respect to the roller movement groove section formed in each of the ramps.

According to the present invention, by using a motor to generate a braking force (Roller In Ramp) having a self-Energizing structure according to the ramping (Ramping) action to increase through the motor power EMB (Electro mechanical Brake) can be configured and various additional functions such as maintaining pad setting interval can be implemented without using a separate solenoid, which can reduce the overall number of components and reduce cost and weight. Will be.

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 embodied in various different forms, one of ordinary skill in the art to which the present invention pertains may be described herein. It is not limited to the Example to make.

1 is a block diagram of a roller-in-ramp type electric brake system according to the present invention. The EMB (Electro mechanical Brake), which is an electric brake system according to the present invention, grasps a driving state of a vehicle and receives a signal of an electronic brake pedal. The power generated by the ECU 1 that receives the control signal, the caliper assembly 2 that applies the braking force while wrapping the shock disk D, and the one motor 6 controlled by the ECU 1 during braking. It has a spindle that is axially moved to implement additional functions such as maintaining the pad setting intervals, while pressing the pads 3 and 4 toward the wheel disk D by applying a linear movement force through a ramping action. It consists of an actuator assembly.

In addition, the electric brake system further includes an auxiliary battery, which is used as a spare battery for the ECU 1 and the motor 6 of the actuator assembly.

In addition, the electric brake system receives a signal so that the ECU 1 recognizes the parking brake switching state when the parking brake is operated. For example, a parking brake button for generating a separate electric signal to the ECU 1 toward the driver's seat. Will be used.

In addition, the ECU 1 is provided with vehicle depression information through a 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 for braking.

In addition, the caliper assembly 2 is disposed on both sides of the wheel disk D, and inner and outer pads 3 and 4 for pressing the wheel disk D, and the wheel disk D rotating together with the wheel. Wrapping is made of a caliper body (5).

The caliper body 5 has a torque member (1) which implements an interlocking action such that when the inner pad 3 is pressed toward the wheel disk D, the outer pad 4 positioned on the opposite side is also moved toward the wheel disk D. A function of a conventional caliper type brake).

In addition, the caliper body (5) and the actuator assembly coupled to the various sensors are also mounted to transmit the measurement signal to the ECU (1), for example, the distance between the wheel disk (D) due to exceeding the set interval of the pad A pad wear detection sensor will be provided to detect the increase and maintain the set distance at all times.

The actuator assembly is controlled by the ECU 1 to generate a rotational force for braking, and one end is coupled to the caliper body 5, and the other end is coupled to the motor 6, and an inner outer The rotational force of the spindle member 7 and the motor 6 that adjusts the distance between the wheel disks D according to the wear of the pads 3 and 4 is increased by the ramping action, and the pads (the wheels D) toward the wheel disks D. It consists of a RIR (Roll In Ramp) member 10 for converting 3,4 into a linear moving force for pressing.

To this end, the spindle member 7 has a spindle shaft 8 having one end coupled to the motor 6 so as to receive the rotational force of the motor 6 and the spindle shaft 8 through the rotation of the spindle shaft 8. As it exits or enters, it consists of a piston 9 screwed to a threaded portion formed on the spindle shaft 8 to adjust the distance between the axes with the motor 6 and joined to the caliper body 5.

Here, the spindle shaft (8) forms a screw on the outer circumferential surface only in a predetermined section that is coupled to the piston (9), the piston (9) forms a protrusion on the outer circumferential surface to facilitate engagement with the caliper body (5) Done.

In addition, the RIR (Roll In Ramp) member 10 is coupled to and fixed to the rotation axis of the motor 6, the input ramp 11 is rotated through the rotation of the motor 6, and the input ramp 11 Roller moving grooves 11a and 13a respectively formed in the output lamp 13 and the output lamp 13 corresponding to the input lamp 11, which are coupled to each other and fixed to the inner pad 3, and are linearly moved. By moving the position relative to the section, it is composed of a roller 12 for backing the linear movement force for pushing the output lamp 13 toward the wheel disk (D).

Here, the roller moving grooves (11a, 13a) formed in the input lamp 11 and the output lamp 13, respectively, to form a variety of shapes, for example, form a "V" shape that the cross section is widely spread, or is gentle It forms a curved "V" shape.

In addition, although the roller 12 located between the roller moving grooves 11a and 13a formed in the input lamp 11 and the output lamp 13, respectively, generally has a cylindrical shape, in consideration of the force power ratio, It can be done.

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

The EMB (Electro mechanical Brake), which is a roller in ramp (RIR) type electric brake device of the present invention, includes a motor (6) controlled by the ECU (1) on a caliper body (5) surrounding the wheel disc (D), 12V type motor by ramping through the roller 12 during braking, as the RIR (Roll In Ramp) member 10 generates a linear movement force along with the rotation of the motor 6. The piston 9 mounted on the caliper body 5 and the piston 9 mounted on the caliper body 5 not only generate a sufficient braking force by increasing the driving force generated in (6), but also increasing the pressing force of the pads 3 and 4 for pressing the wheel disc D. Excessive spacing caused by wear of the pads 3, 4 through the forward movement of the spindle shaft 8, by means of the interaxial movement through the spindle shaft 8, which is screwed and coupled to the motor 6. There is a feature that can be corrected automatically.

To this end, the RIR type EMB of the present invention, as shown in Fig. 1, the ECU receiving the signal of the electronic pedal to the caliper body (5) having the inner outer pads (3, 4) for pressing the wheel disk (D) A 12V type motor 6 driven through (1) to generate a rotational force is mounted, and the power generated by the motor 6 is multiplied by a linear movement force through a ramping action to the wheel disk (D). The RIR (Roll In Ramp) member 10 which presses the inner outer pads 3 and 4 is mounted.

In addition, the RIR type EMB of the present invention further includes a spindle member 7 at the rear of the motor 6 having the RIR (Roll In Ramp) member 10 mounted at the distal end portion, and the inner outer pads 3 and 4. Is worn and the gap between the wheel disks D is out of the initial setting range, the spindle 8 is moved forward from the piston 9 screwed together while forming the spindle member 7, and the worn inner outer The pads 3 and 4 are moved to the wheel disk D to always maintain the initial set interval.

In the RIR type EMB, when the ECU 1 detects the electronic pedal operation in the initial state to drive the motor 6, the motor 6 rotates to operate the roll in ramp member 10. This operation of the Roll In Ramp (RIR) member 10 causes the inner pad 3 to be pressed against the wheel disk D while the driving force of the motor 6 is boosted through its own ramping action. do.

That is, when the motor 6 is rotated, as shown in FIG. 2, the input lamp 11 coupled to the motor 6 is rotated together, and the rotation of the input lamp 11 is performed by the roller moving groove 11a. The roller 12 positioned in the roller 12 is rotated and moved, whereby the position of the roller 12 is opposed to the input lamp 11 so as to form a roller moving groove 13a in which the roller 12 is located. The output lamp 13 is switched by the force to push out.

This is in accordance with the change of the position of the roller 12 with respect to the roller moving grooves 11a and 13a formed in the input lamp 11 and the output lamp 13, that is, the roller 12 has the roller moving grooves 11a and 13a. When the rotational force of the input lamp 11 through the motor 6 is received in the initial state of the deepest recessed position of the), the roller 12 is rotated by the frictional force to come out to the edge of the roller movement groove 11a. .

The positional movement of the roller 12 with respect to the roller movement groove 11a causes a ramping action to widen the gap between the input lamp 11 and the output lamp 13, and thus the output ramp ( As the inner pad 3 is pushed toward the wheel disk D, the inner pad 3 together with the outer pad 4 is pushed by the pressing force F as the inner pad 3 is pushed toward the wheel disk D. (D) is pressed, which acts as a braking force of the wheel disk (D).

When the wheel disks D are braked by the inner outer pads 3 and 4 in this manner, the inner outer pads 3 and 4 are disengaged due to the inertia of the wheel disks D rotating at high speed. The inner and outer pads 3 and 4 are pushed in the direction of rotation, which further amplifies the ramping action generated by the input lamp 11, the output lamp 13, and the roller 12, thereby providing braking force. Will strengthen.

That is, when the behavior of the inner pad 3 in which the rotational direction push is generated from the wheel disk D is transmitted to the output lamp 13, the roller located in the roller movement groove 13a while the output lamp 13 is rotated. (12) is moved from the roller movement groove (13a) by the frictional force, this position movement of the roller 12 again generates a ramping action to widen the gap between the input ramp 11 and the output ramp (13) Will let you.

The ramping action according to the behavior of the output lamp 13 due to the rotational push of the inner pad 3 due to the wheel disk D opens the output lamp 13 further, and this output lamp 13 The movement of, again pushes the pad 3 towards the wheel disk D, thereby braking the wheel disk D more strongly.

On the other hand, wear of the inner outer pads 3 and 4 according to the use of the RIR type EMB is realized through the spindle member 7 coupled to the motor 6 and the caliper body 5, that is, the inner outer pad. When the ECU 1 detects a state in which the distance between the wheel disks D and the wheel disks 3 and 4 is out of the installation interval, the ECU 1 rotates the motor 6, at which time the motor 6 Is a state in which a small torque and no ramping action occurs.

When the spindle shaft 8 coupled to the motor 6 is rotated together by the rotation of the motor 6, the spindle shaft is coupled from the piston 9 coupled to the caliper body 5 and screwed to the spindle shaft 8. (8) is the position movement, that is, the spindle shaft (8) is pushed out of the piston (9) to push the motor (6) portion, this movement of the motor (6) portion is the RIR (Roll In Ramp) member 10 ), The inner pad (3) part is pushed toward the wheel disk (D) to adjust the gap according to wear.

1 is a configuration diagram of a roller in lamp type electric brake system according to the present invention;

2 is an operation of the roller-in-lamp type electric brake system according to the present invention.

1: ECU 2: Caliper Assembly

3,4: inner outer pad

5: caliper body 6: motor

7: spindle assembly 8: spindle axis

9: Piston 10: RIR (Roll In Ramp) Assembly

11: input ramp 11a, 13a: roller moving groove

12 roller 13 output lamp

D: Wheel Disc

Claims

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 electronic pedal;

A caliper assembly 2 provided with an inner outer pad 3 and 4 provided inward of the caliper body 5 to pressurize and brake the fin disk D;

When braking, the power generated by one motor 6 controlled by the ECU 1 is multiplied by a linear movement force through a ramping action to press the pads 3 and 4 toward the wheel disc D. In addition, an actuator assembly having a spindle axially moved to implement additional functions such as maintaining a pad setting interval;

Roller-in-lamp type electric brake system, characterized in that consisting of.

The motor of claim 1, wherein the actuator assembly is controlled by an ECU 1 and generates a rotational force for braking;

One end is coupled to the caliper body 5 and the other end is coupled to the motor 6 to adjust the distance between the wheel discs D according to the wear of the inner outer pads 3 and 4;

It consists of a roll in ramp member 10 for converting the rotational force of the motor 6 into a linear movement force that presses the pads 3 and 4 toward the wheel disk D while ramping by a ramping action. The roller-in lamp type electric brake system characterized by the above-mentioned.

The spindle shaft (8) according to claim 2, wherein the spindle member (7) has a spindle shaft (8), one end of which is coupled to the motor (6) so as to receive the rotational force of the motor (6), and through the rotation of the spindle shaft (8). ) Is composed of a piston (9) coupled to the caliper body (5) by screwing into a threaded portion formed on the spindle shaft (8) to adjust the distance between the shaft and the motor (6) as it exits or enters Roller-in ramp type electric brake system.

The input ramp 11 according to claim 2, wherein the roll in ramp member 10 is coupled to and fixed to a rotation shaft of the motor 6, and rotates through the rotation of the motor 6, and the input ramp ( 11, the roller movement grooves 11a formed in the output lamp 13 and the output lamp 13 corresponding to the input lamp 11, which are coupled to and fixed to the inner pad 3, and are linearly moved. A roller-in-lamp electric brake system, characterized in that it consists of a roller (12) for backing a linear movement force that pushes the output lamp (13) toward the wheel disk (D) through a positional movement of the section.

The roller-in-lamp type electric brake according to claim 4, wherein the roller moving grooves 11a and 13a respectively formed in the input lamp 11 and the output lamp 13 have a "V" shape with a wide cross section. system.

The roller-in-lamp type electric brake system according to claim 4, wherein the roller (12) consists of a tapered circular column.