KR20090039059A - Drum united type electrical parking brake in vehicle - Google Patents

Drum united type electrical parking brake in vehicle Download PDF

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Publication number
KR20090039059A
KR20090039059A KR1020070104471A KR20070104471A KR20090039059A KR 20090039059 A KR20090039059 A KR 20090039059A KR 1020070104471 A KR1020070104471 A KR 1020070104471A KR 20070104471 A KR20070104471 A KR 20070104471A KR 20090039059 A KR20090039059 A KR 20090039059A
Authority
KR
South Korea
Prior art keywords
drum
parking brake
shaft
screw
jack assembly
Prior art date
Application number
KR1020070104471A
Other languages
Korean (ko)
Inventor
박창훈
여훈
Original Assignee
현대모비스 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 현대모비스 주식회사 filed Critical 현대모비스 주식회사
Priority to KR1020070104471A priority Critical patent/KR20090039059A/en
Publication of KR20090039059A publication Critical patent/KR20090039059A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
    • B60T13/746—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive and mechanical transmission of the braking action
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
    • B60T13/748—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive acting on electro-magnetic brakes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T7/00—Brake-action initiating means
    • B60T7/12—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2400/00—Special features of vehicle units
    • B60Y2400/81—Braking systems

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)

Abstract

A drum integrated electronic control parking brake is provided to measure accurate clamping force of the jack assembly with an infrared sensor applied to the screw jack portion and compensate abrasion of the shoe effectively. A drum integrated electronic control parking brake comprises a motor(2) which is driven by an ECU and provides the power of locking/releasing a parking brake, a drive shaft(5) rotated by a gear-box(3) converting the torque of the motor, a driven shaft(7) generating the torque converted into the direction perpendicular to the drive shaft, a jack assembly(10) which is opened and closed by the driven shaft, an infrared sensor(9) which measures the location change of the jack assembly so that the ECU calculates the clamping force of the jack assembly, and a wheel cylinder made of a shoe forced towards a drum(D) by the jack assembly.

Description

Drum united type electrical parking brake in vehicle

The present invention relates to a parking brake, and more particularly to a drum integrated electronically controlled parking brake.

In general, when a driver parks a vehicle, the driver brakes the movement of the vehicle.

Such a parking brake normally distributes the force applied to the parking cable pulled by the parking brake lever evenly to the brake mechanism mounted on the wheel through an equalizer, through which the brake mechanism restrains the wheel to prevent vehicle movement. Will be prevented.

As described above, in the case of braking the wheel by operating the parking brake lever, it is very inconvenient because the driver has to manually operate the parking brake lever every time in order to brake the parking lot. This will be.

Accordingly, an electronic parking brake (EPB) is used to safely maintain the braking state while simply performing the parking operation by using the driving force of the motor during parking to alleviate the inconvenience of the manual type. When the parking brake device normally drives the motor by pressing an operation button, the parking brake pulls the parking cable according to the rotation of the motor to generate an equal braking force on each wheel through an equalizer.

In the electronically controlled parking brake EPB, the power generated from the actuator (motor) is transmitted through a long cable, and the one cable method of generating the final clamping force is a cable having a long power transmission. As a result, the power transmission loss is severe and the space constraints that can be installed in the vehicle are severe.

In addition, as the one cable type EPB transmits power using the cable during operation, there is a limitation in that the sensing inaccuracy due to the elongation of the cable, that is, the clamping force measurement and the inaccuracy due to the constraint of the cable deformation. .

Accordingly, the present invention has been invented in view of the above. As the actuator is mounted directly on the drum to implement a parking operation without using a power transmission cable, there is no power transmission loss due to the cable. Its purpose is to provide a drum-integrated electronic parking brake with no vehicle installation space restrictions.

In addition, the drum integrated electronically controlled parking brake (EPB) of the present invention multiplies the power of the actuator by a screw jack method, thereby applying an infrared sensor to the screw jack to improve the accuracy of the clamping force measurement, as well as accurate. Sensing aims to improve shoe wear compensation operating performance as well as dynamic driving mode operability.

The present invention for achieving the above object, the drum integrated electronic control parking brake ECU for controlling a motor to receive a variety of information related to the parking operation to generate a control signal,

A motor driven by the ECU to provide a parking brake lock and a parking brake release force;

A drive shaft rotated through the final output of the gearbox converting the rotational force of the motor,

A driven shaft for generating a rotational force converted in a direction perpendicular to the drive shaft;

Jack asssay consisting of a link structure for implementing the behavior of opening and closing through the driven shaft,

A sensor for measuring a position change according to the behavior of the jack assembly, so that the ECU calculates the clamping force of the jack assembly;

Characterized in that consisting of a wheel cylinder made of a shoe that is pressed toward the drum through the jack assembly.

In addition, a motor, a reducer, and a drive shaft are positioned on one side of the drum, and a jack assembling the driven shaft through a pair of shoes provided to move and pressurize to the drum on the other side of the drum. Say is located.

In addition, the jack assembly is a screw shaft that is rotated, and the right screw coupled axially moved along the screw shaft rotated to generate a braking force for pressing both shoes toward the drum while being opened or retracted in accordance with the rotation direction of the screw shaft. A pair of screw coupling members comprising a member and a left screw coupling member, and a central portion of the screw coupling member are hinged to constitute a left and right jack link that is opened or retracted through an axial movement of the screw coupling member along a screw axis.

The sensor includes a light emitting part provided in the left screw engaging member which is axially moved along the screw axis, and a light receiving part provided in the right screw engaging member and receiving a signal of the light emitting part and transmitting the signal to the ECU.

According to the present invention, as the actuator is mounted directly on the drum portion and configured as a drum-integrated electronic parking brake without a power transmission cable, the clamping force is eliminated without loss of power transmission by the cable. In addition to the transmission, accurate measurement of the clamping force by means of an infrared sensor applied to the screw jack that powers the actuator can improve shoe wear compensation operation performance as well as dynamic driving mode operation. Will be.

In addition, according to the present invention, the actuator is mounted directly on the drum to constitute a drum-integrated electronic parking brake without a power transmission cable, so that the power transmission cable is removed, so there is almost no vehicle installation space constraint. It is effective in improving the Out (Lay Out) property.

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 drum integrated electronic control parking brake according to the present invention, EPB (Electronic Parking Brake) is a drum integrated electronic control parking brake according to the present invention is controlled by receiving various information related to the parking operation ECU (1) for controlling the motor (2) for generating a signal, a motor (2) that is driven through the ECU (1) to provide a parking brake lock and parking brake release force, the rotational force of the motor (2) A jack which realizes the gearbox 3 decelerating, the power switching assembly 4 for switching the output direction through the gear box 3, and the opening and closing behavior through the power switching assembly 4. It is composed of a wheel cylinder consisting of an shoe (10) and the shoe (S) is pressed toward the drum (D) through the jack assembly (10).

In addition, the drum integrated EPB further includes a sensor 9 for measuring an operating load, and the sensor 9 transmits a measurement signal to the ECU 1.

In the drum integrated EPB, the motor 2, the gear box 3, the power conversion assembly 4 and the jack assembly 10 are mounted on the drum D side, and the jack assembly 10 is When the shoe is positioned between the pair of shoes S, the shoe S is pushed toward the drum D.

In addition, the gear box 3 serves to increase or decrease the speed at a rate that requires the rotational force of the motor 2, which is a conventional configuration.

In addition, the power conversion assembly 4 includes a drive shaft 5 which is rotated through the final output of the gear box 3 and a driven shaft which generates a rotational force that is switched in a direction perpendicular to the drive shaft 5 ( 7) consists of.

Here, the drive shaft 5 and the driven shaft 7 uses a variety of gears for switching the direction of rotation at right angles, for example, the drive gear 6 on the outer peripheral surface along the longitudinal direction of the drive shaft 5 The driven shaft 7 is composed of a driven gear 8 engaged with the drive gear 6, that is, a worm shaft type drive gear 6 and a worm wheel type driven gear 8.

In addition, the jack assembly 10 is a braking force for pressing both the shoes (S) toward the drum (D) while being opened or closed in accordance with the rotating screw shaft 11 and the direction of rotation of the screw shaft (11). It is composed of a pair of pressing members for generating a.

At this time, the screw shaft 11 receives a rotational force from the driven shaft 7 constituting the power conversion assembly 4, for this purpose through the coupling end 11a such as the driven shaft 7 and the nut. Are combined.

In addition, the pressing member is a pair of screw engaging member consisting of a right screw engaging member 12 and a left screw engaging member 13 which are axially moved along the screw shaft 11 when the screw shaft 11 is rotated ( 12, 13, and the center portion is hinged to the left and right jack link (14, 15) to be opened or retracted through the axial movement of the screw coupling member (12, 13) along the screw shaft (11) It is constructed.

In addition, the left and right jack links 14 and 15 are provided with left and right shoe guiders 14a and 15a so as to press the shoe S when they are opened, and the shoe guiders 14a and 15a are left and right. It is provided with a hinge shape of the jack link (14, 15) while having a groove shape opened to fit in the shoe (S).

In addition, the left and right shoe guiders 14a and 15a are provided on the upper and lower surface portions of the left and right jack links 14 and 15, respectively, to press the shoe S more stably.

In addition, the sensor 9 is provided in the light emitting portion 9a provided in the left screw coupling member 13 which is axially moved along the screw shaft 11 and the right screw coupling member 12 and provided in the light emitting portion ( It consists of the light receiving part 9b which receives the signal of 9a), and transmits it to ECU1.

Such a sensor 9 is configured in various ways, for example, using an infrared sensor type or a contact or non-contact sensor.

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

EPB (Electrical Parking Brake), an electronically controlled parking brake of the present invention, has a power transmission loss as a motor (2, actuator), which is a power source for operating a wheel cylinder, is directly mounted on a drum (D) portion of a wheel cylinder. Since the cable that does not exist between the motor 2 and the wheel cylinder does not exist, and the motor 2 directly transmits the power at the wheel cylinder part, there is no restriction on vehicle installation space due to the mounting, and the wheel cylinder is operated. Sensor 9 can be installed to measure clamping force using screw jacks (10, Screw Jack) to improve shoe wear compensation performance and dynamic driving mode operability based on accurate sensing. There will be features to do.

This characteristic is due to the EPB of the present invention having a drum integrated type, that is, a motor controlled by the ECU (1) generating a control signal by receiving various information related to the parking operation as shown in FIG. 2) and the jack assembly 10 which opens the shoe S while the speed reducer 3 and the power conversion assembly 4 for converting the rotational force of the motor 2 are installed at the drum D portion. The screw is positioned between both sides of the pair of shoes (S) facing each other, forming a link structure to have a self-locking function and to act as a back force.

To this end, the reducer 3 and the power conversion assembly 4 are shown in FIG. 1 in the axial direction of the motor 2, that is, via the reducer 3 coupled to the motor shaft of the motor 2. The drive shaft 5 extends and protrudes in the moto axial direction, and the driven shaft 7 is positioned perpendicular to the drive shaft 5 so as to generate a rotational force which is switched in a direction perpendicular to the drive shaft 5.

At this time, the drive shaft 5 is a worm shaft type drive gear 6 is formed on the outer peripheral surface along the longitudinal direction, the driven shaft 7 is a worm wheel type driven gear 8 is meshed with the drive gear (6). The driven gear 8 is switched in the orthogonal direction with respect to the rotational direction of the drive gear 6.

As described above, after the rotational force of the motor 2 is switched via the worm shaft type driving gear 6 of the drive shaft 5 and the worm wheel type driven gear 8 of the driven shaft 7, the pair facing each other. Jack assembly 10 penetrated between both sides of the shoe (S) of the opening to generate a braking force for pressing both shoes (S) toward the drum (D), for this purpose the jack assembly 10 is A link structure with a right screw is achieved.

That is, according to the rotation of the screw shaft 11 coupled to the driven shaft 7 as shown in (a) and (b) of the jack assembly 10, the axial direction along the screw shaft 11 The right screw engaging member 12 and the left screw engaging member 13 which are moved and approach each other are provided, and the center of the right and left screw engaging members 12 and 13 is spread out to both the left and right sides in the axial approach. Left and right jack links 14 and 15 of the hinged link structure are provided with left and right shoe guiders 14a and 15a.

Accordingly, when the drum integrated EPB is activated, that is, when the parking brake is shown in FIG. 2 (b), the rotational force of the motor 2 controlled by the ECU 1 is transmitted to the drive shaft 5 through the reducer 3. Then, the driven shaft 7 is driven by the worm wheel type driven gear 6 of the drive shaft 5 in the direction perpendicular to the drive shaft 5 via the worm wheel type driven gear 8. It will switch the rotational force of.

Subsequently, the rotational force of the driven shaft 7 rotates the screw shaft 11 coupled to the driven shaft 7 via the fastening end 11a, and the rotation of the screw shaft 11 is called clockwise. Assumption) is moved so that the right and left screw engaging members 12 and 13 approach each other along the axial direction of the screw shaft 11.

Thus, when the right and left screw engaging members 12 and 13 approach each other along the axial direction of the screw shaft 11, both ends are fixed to the right and left screw engaging members 12 and 13 and the center thereof is hinged. The left and right jack links 14 and 15 which are the link structures are spread to both the left and right sides.

As a result, the left and right shoe guiders 14a and 15a provided as the center portions of the left and right jack links 14 and 15 also open to both sides, so that the shoe guiders 14a and 15a are positioned to both sides. The shoe (S) is pushed while being fitted to (S), the movement of the shoe (S) is to push the pad toward the drum (D) to maintain the parking braking force.

At this time, the left and right jack links 14 and 15 structurally generate a force for pushing the shoe S by using the relative movement between the right and left screw coupling members 12 and 13, and thus, the left and right jack links 14 and 15 According to the operating angles of the jack links 14 and 15, the structural force can be reduced, and thus the capacity of the motor 2 can be reduced, and between the screw shaft 11 and the right and left screw engaging members 12 and 13 themselves. Through self-locking function, when braking occurs, stable motion can be realized and excessive reaction force of the motor 2 can be eliminated.

In addition, the clamping force for the drum D of the shoe S through the left and right jack links 14 and 15 is transmitted to the ECU 1 through the sensor 9, which is shown in FIG. As shown in FIG. 9, the light emitting portion 9a is provided at the left screw coupling member 13 in which the sensor 9 is axially moved along the screw shaft 11, and the light emitting portion is formed at the right screw coupling member 12. A light receiving portion 9b for receiving the signal of 9a is provided.

Accordingly, during EPB operation, the clamping force generated by the left and right jack links 14 and 15 that press the shoe S toward the drum D is measured by the sensor 9 and transmitted to the ECU 1. The light emitting portion 9a and the light receiving portion 9b are brought closer to each other according to the access degree of the right and left screw engaging members 12 and 13 that open the left and right jack links 14 and 15. The distance approach of 9a) and the light receiving portion 9b shortens the time for the reception of the infrared light receiving portion 9b emitted from the light emitting portion 9a, so that the ECU 1 uses the left and right jack links 14 and 15 to make a shorter time. The magnitude of the clamping force generated in the control of the motor (2).

1 is a block diagram of a drum integrated electronic control parking brake according to the present invention

Figure 2 (a), (b) is a block diagram of a sensor and a screw jack assembly of the drum integrated electronic parking brake according to the present invention.

3 is a state in which the drum electronically controlled parking brake according to the present invention is integrally mounted to the drum.

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

1: ECU 2: Motor

3: gear box 4: power conversion assembly

5: drive shaft 6: drive gear

7: driven shaft 8: driven gear

9 sensor 9a light emitting unit

9b: Receiver 10: Jack Asssay

11 screw shaft 11a

12: right screw coupling member

13: left screw coupling member

14,15: left and right jack link

14a, 15a: Left and right shoe guiders

D: Drum S: Shoe

Claims (7)

ECU (1) for controlling the motor (2) receiving a plurality of information related to the parking operation to generate a control signal, A motor 2 driven through the ECU 1 to provide a parking brake lock and a parking brake release force; A drive shaft 5 which is rotated through the final output of the gear box 3 which converts the rotational force of the motor 2, A driven shaft 7 for generating a rotational force which is switched in a direction perpendicular to the drive shaft 5, Jack assembly 10 consisting of a link structure for implementing the movement that is spread and retracted through the driven shaft (7), A sensor 9 for measuring a position change according to the behavior of the jack assembly 10 so that the ECU 1 calculates the clamping force of the jack assembly 10; Drum integrated electronic control parking brake, characterized in that consisting of a wheel cylinder consisting of a shoe (S) is pressed toward the drum (D) through the jack assembly (10). The motor (2), the reducer (3) and the drive shaft (5) are positioned on one side of the drum (D), and the drum (D) moves toward the drum (D). And a jack assembly (10) coupled with a driven shaft (7) rotated through the drive shaft (5) through a pair of shoes (S) provided to pressurize the drum. Integrated electronically controlled parking brake. The worm wheel type driven gear according to claim 1, wherein a worm shaft type drive gear 6 is formed on an outer circumferential surface along the longitudinal direction of the drive shaft 5, and is engaged with the drive gear 6 on the driven shaft 7. A drum integrated electronically controlled parking brake, characterized in that (8). The method of claim 1, wherein the jack assembly 10 is a screw shaft 11 to be rotated, and both shoes (S) toward the drum (D) while being opened or closed in accordance with the rotation direction of the screw shaft (11). A pair of screw engaging members 12 and 13, centered of a right screw engaging member 12 and a left screw engaging member 13 axially moved along a screw shaft 11 that is rotated to generate a pressing braking force The drum is characterized in that the portion is composed of a left and right jack link (14, 15) is hinged to be opened or retracted through the axial movement of the screw coupling member (12, 13) along the screw shaft (11) Integrated electronically controlled parking brake. The drum integrated electronically controlled parking brake according to claim 4, wherein the left and right jack links (14, 15) are provided with left and right shoe guiders (14a, 15a) to press the shoe (S) when opened. . The method according to claim 1, wherein the sensor (9) is provided in the light emitting portion (9a) provided on the left screw engaging member 13 is moved in the axial direction along the screw shaft 11, and the right screw engaging member (12) A drum integrated electronically controlled parking brake, comprising a light receiving portion 9b for receiving a signal from the light emitting portion 9a and transmitting it to the ECU 1. 7. The drum integrated electronically controlled parking brake according to claim 6, wherein the sensor (9) is an infrared sensor type.
KR1020070104471A 2007-10-17 2007-10-17 Drum united type electrical parking brake in vehicle KR20090039059A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020070104471A KR20090039059A (en) 2007-10-17 2007-10-17 Drum united type electrical parking brake in vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020070104471A KR20090039059A (en) 2007-10-17 2007-10-17 Drum united type electrical parking brake in vehicle

Publications (1)

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KR20090039059A true KR20090039059A (en) 2009-04-22

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KR1020070104471A KR20090039059A (en) 2007-10-17 2007-10-17 Drum united type electrical parking brake in vehicle

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8720653B2 (en) 2011-10-07 2014-05-13 Hyundai Motor Company Drum-integrated electric parking brake
KR20220158473A (en) 2021-05-24 2022-12-01 에이치엘만도 주식회사 Motor-driven drum brake system and control method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8720653B2 (en) 2011-10-07 2014-05-13 Hyundai Motor Company Drum-integrated electric parking brake
KR20220158473A (en) 2021-05-24 2022-12-01 에이치엘만도 주식회사 Motor-driven drum brake system and control method thereof

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