KR20130141073A - Sensor and electronic parking brake having the same - Google Patents

Sensor and electronic parking brake having the same Download PDF

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Publication number
KR20130141073A
KR20130141073A KR1020120064169A KR20120064169A KR20130141073A KR 20130141073 A KR20130141073 A KR 20130141073A KR 1020120064169 A KR1020120064169 A KR 1020120064169A KR 20120064169 A KR20120064169 A KR 20120064169A KR 20130141073 A KR20130141073 A KR 20130141073A
Authority
KR
South Korea
Prior art keywords
magnet
sensor
yoke
cables
magnetic element
Prior art date
Application number
KR1020120064169A
Other languages
Korean (ko)
Inventor
손호찬
Original Assignee
엘지이노텍 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 엘지이노텍 주식회사 filed Critical 엘지이노텍 주식회사
Priority to KR1020120064169A priority Critical patent/KR20130141073A/en
Publication of KR20130141073A publication Critical patent/KR20130141073A/en

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Classifications

    • 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
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/17—Using electrical or electronic regulation means to control braking
    • B60T8/171—Detecting parameters used in the regulation; Measuring values used in the regulation
    • 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

Abstract

A motor according to an embodiment of the present invention comprises an insulator body joined to a stator core on which a plurality of coils is wound for applying power having different polarities in order to prevent a short circuit between the coils and the stator core; a terminal housing joint which is integrated with the insulator body, which is protruding in a circumferential direction, and which is joined to a terminal housing for supplying external power; and a coil guide unit on the terminal housing joint for preventing a short circuit between the coils connected to each terminal having different polarities on the terminal housing.

Description

Sensor and Electronic Parking Brake having the same

This application example relates to a sensor for detecting a magnetic field change of the magnet and an electronically controlled parking brake having the same.

In general, an electronic parking brake (EPB) is a device for operating the parking brake provided to prevent the parked vehicle from moving by using the power of the driving motor instead of the driver's power.

Electronically controlled parking brakes can be broadly divided into a cable puller type and a motor on caliper type. In general, an electronically controlled parking brake of a cable puller type is commonly used.

An electronically controlled parking brake of a cable puller type is connected to a brake mounted on a wheel of a vehicle by a cable, and is configured to prevent the wheel from rolling by operating the driving motor to pull the cable. As related prior art documents, Korean Patent Publication No. 10-2011-0125135 (published on November 18, 2011) has been disclosed.

The cable puller type electronically controlled parking brake is provided with a sensor for detecting the strength of the force received by the cable according to the operation of the screw nut unit that serves to pull the cable. The sensor requires the installation of a magnet, a magnetic element for measuring a change in magnetic force of the magnet, and a control program for calculating a force received by the cable based on the measured value of the magnetic element.

In order to accurately detect a change in magnetic force due to the movement of the magnet, a magnet generating a strong magnetic force is required, and a magnet using an expensive rare earth metal is frequently used as a magnet generating a strong magnetic force. Recently, a problem arises in that the manufacturing cost of rare earth magnets increases due to the increase in the price of rare earth metals. Accordingly, there is a demand for the development of a sensor having an improved structure to use a magnet that can be used as a replacement for the rare earth magnets.

The purpose of this application is to provide a sensor having an improved structure to use a magnet having a relatively small magnetic force compared to rare earth magnets.

Sensor according to the present application is yoke; A magnet installed in the yoke inner space; And

It is installed on the surface facing the magnet, the magnetic element for detecting a change in the magnetic force of the magnet; includes, The yoke, characterized in that the surface facing the magnetic element of the magnet is open to expose the magnet .

The yoke may be formed of a metal material.

Electronically controlled parking brake according to the present application includes a housing; First and second cables, one end of which is connected to a brake unit installed on the vehicle wheel; A drive motor installed inside the housing and generating power for pulling the first and second cables; A reduction gear unit for transmitting rotational power of the drive motor; A cable pulling unit that pulls the first and second cables in association with the rotation operation of the reduction gear unit; A sensor for sensing a force between the first and second cables; And a controller configured to control an on / off point of time of the driving motor by using the detection signal of the sensor, wherein the sensor comprises: a yoke; A magnet installed in the yoke inner space; And a magnetic element installed on a surface facing the magnet to sense a change in magnetic force of the magnet, wherein the yoke is open to face the magnetic element of the magnet to expose the magnet. .

The yoke is preferably formed of a metal material.

The yoke and the magnet are moved in a direction parallel to the moving direction of the first and second cables, the magnet is installed so as to be close to the magnetic element when the first and second cable is pulled, or the magnetic element and It may be installed away from you.

On the other hand, the sensor is one end is connected to the sensor connection portion provided in the cable pulling unit, the other end is the sensor housing coupled to the second cable; A magnet moving member in which the yoke and the magnet are installed; And a magnet elastic member elastically supporting the movement of the magnet elastic member.

Since the magnet is wrapped in a metal yoke and only the surface facing the magnetic element of the magnet is opened, it is possible to provide a sensor with a precision similar to the past even when a magnet having a relatively weak magnetic force is used compared to a rare earth magnet. The manufacturing cost of the sensor can be reduced.

1 is a view schematically showing a configuration of a sensor applied to a brake device according to the present application;
FIG. 2 is a view showing the magnet and the magnetic element of FIG. 1 according to the first embodiment, and FIG.
3 is a diagram illustrating the magnet and the magnetic device of FIG. 1 according to a second embodiment.

Hereinafter, a brake device according to the present application will be described with reference to the drawings.

1 is a view schematically showing a configuration of a sensor applied to a brake device according to the present application example, FIG. 2 is a view showing a magnet and a magnetic element of FIG. 1 according to a first embodiment, and FIG. 3 is a second embodiment. 1 is a diagram illustrating a magnet and a magnetic device of FIG. 1 according to an example.

As shown, the electronically controlled parking brake according to the present application includes a housing 10, a drive motor 20, a reduction gear unit 30, a controller 40, and a cable pulling unit 50.

The housing 10 is connected to first and second cables 1 and 2 at both ends. The first and second cables (1) and (2) are connected to a brake unit, each end of which is installed on a wheel of the vehicle, so that the first and second cables (1) and (2) are inside the housing (10). When pulled in, the brake unit can be actuated to restrain the wheel from moving.

The first cable 1 is connected with the screw member 4 under the interposition of the first connecting member 3 which grips the end thereof, and the outer side of the first connecting member 3 and the screw member 4 has the A screw housing 5 coupled with the housing 10 may be installed.

The second cable 2 may be connected to the housing 10 on the opposite side of the connecting portion of the first cable 1 of the housing 10. According to the present application example, one end of the second cable 2 is connected to the cable pulling unit 50 to be described later, which is installed in the housing 10, under the interposition of the second connecting member 2a. 2 The other end of the cable 2 may be connected to the brake unit not shown.

The drive motor 20 is a device for supplying power for controlling the pulling operation of the first and second cables 1 and 2, and a general brushless motor composed of a stator and a rotor may be used, and is not shown. Though not provided, it may be provided as a step motor. The drive motor 20 may include a rotation shaft 21 and a drive gear 22 that rotates in conjunction with the rotation shaft 21.

The reduction gear unit 30 includes a first reduction gear 31 and a second reduction gear 32. The first reduction gear 31 is gear-coupled with the drive gear 22 to rotate in coordination with the rotation of the drive gear 22, and the second reduction gear 32 is the first reduction gear 31. Is installed on the same rotation shaft as, can rotate in conjunction with the rotation of the first reduction gear (31). In this case, the number of gear teeth of the first and second reduction gears 31 and 32 may be different from each other, and the number of gear teeth of the second gear reduction gear 32 is greater than the number of gear teeth of the first reduction gear 31. It can be formed large.

The controller 40 may control a pulling operation of the first and second cables 1 and 2 through on / off control of the driving motor 20.

As shown in FIG. 1, the cable pulling unit 50 may include a nut gear 51, a nut member 52, and a sensor connection part 53.

The nut gear 51 may be gear-coupled with the second reduction gear 32 to rotate in conjunction with the rotation of the second reduction gear 32. The nut gear 51 forms a through hole at the center thereof, and the nut member 52 may be press-fitted to the through hole.

The nut member 52 may be press-fitted to the center of the nut gear 51 so as to be the rotation shaft of the nut gear 51. Accordingly, the nut member 52 may rotate in conjunction with the rotation of the nut gear 51. A female thread corresponding to the male thread of the screw member 5 may be formed on the inner circumferential surface of the nut member 52. Accordingly, when the nut member 52 rotates in conjunction with the rotation of the nut gear 51, the screw member 4 may reciprocate in the axial direction according to the rotation direction of the nut member 52.

The sensor connection part 53 may be connected to one end of the sensor 100 to be described later, and may be formed at the other end of the insertion position of the screw member 4 geared to the center of the nut member 52. In addition, the central axis of the sensor connection portion 53 and the central axis of the first cable 1 and the second cable 2 may be located on a parallel line with each other.

One end of the sensor 100 is connected to the sensor connection part 53, and the other end thereof is hooked with the second connection member 2a of the second cable 2, and the sensor housing 101 and the sensor latch 102 are connected to each other. ), A magnet moving member 103, a magnet elastic member 104, a magnet unit 110, and a magnetic element 106.

The sensor housing 101 may be formed to have a length corresponding to the separation distance between the sensor connecting portion 53 and the second connecting member 2a, and may form a space portion having a predetermined size therein.

The sensor latch 102 is coupled to the sensor connection part 53, and may be provided to protrude from the sensor housing 81 as shown in FIG. 1. The sensor latch 102 may be connected to the other end of the nut member 52 to move in conjunction with the movement of the nut member 52.

The magnet moving member 103 may be provided to be movable inside the sensor housing 101 as shown. One end of the magnet moving member 103 may be configured to protrude to the outside of the sensor housing 101, as shown in Figure 1, the protrusion has a second connecting member of the second cable (2) (2a) can be hooked. On the other hand, the magnet moving member 103 is moved by the reaction force of the nut member 52 generated by the movement of the screw member 4, the movement of the magnet moving member 103 by the magnet elastic member 104 It can be elastically supported. To this end, one end of the magnet elastic member 104 may be in contact with the magnet moving member 103, the opposite side may be configured to contact the inner circumferential surface of the sensor housing 101.

The magnet unit 110 may be provided at one side of the magnet moving member 103, and may reciprocate in the arrow direction of FIG. 1 according to the movement of the magnet moving member 103. According to this application example, the magnet unit 110 may include a yoke member 111 and a magnet 112.

The yoke member 111 may be formed of a metal material such as steel, and may be provided in a shape corresponding to the magnet 112 so as to wrap the circumference of the magnet 112. For example, when the magnet 112 is formed in a cylindrical shape, the yoke member 111 is also formed in a cylindrical shape, so that the surface facing the magnetic element 106 of the magnet 112 is exposed. An opening surface may be formed on a surface facing the 106.

According to the first embodiment, as shown in FIGS. 1 and 2, the opening surface may be formed in the moving direction of the magnet moving member 103. In this case, the magnetic element 106 may be formed on the inner wall surface of the sensor housing 101 facing the opening surface.

According to the second embodiment, as shown in FIG. 3, the opening surface may be formed in a direction perpendicular to the moving direction of the magnet moving member 103 as an upward direction of the drawing. Even in this case, the magnetic element 106 may be installed on the surface facing the opening of the sensor housing 101 as in the first embodiment described above.

On the other hand, in addition to the first and second embodiments, although not shown, if the magnetic element 106 is a position allowed by design among the inner circumferential surfaces of the sensor housing 101, the opening surface of the magnet unit 110 may be formed. It is possible to be installed on the viewing side.

As such, by providing the yoke member 111 made of metal in the magnet unit 110, only the surface facing the magnetic element 106 of the magnet 112 is exposed, and the remaining portions are shielded with the yoke member 111 ( When shielding, since the magnetic field radiated from the magnet 112 can be concentrated on the exposed surface, even if a magnet 112 having a relatively low magnetic force is used, a sensor and a sensor using a strong magnet such as a rare earth magnet are detected. It is possible to provide a sensor 100 with no significant difference in capability.

On the other hand, the magnetic element 106 may be provided as any one of a magnetoresistive element (ARM IC) and a Hall element (Hall IC), any configuration that can sense the magnetic force of the magnet 112, any It is possible. In addition, the magnetic element 106 detects the change in the magnetic strength through the positional movement of the magnet unit 110 and transmits an electrical signal to the control unit 40.

Hereinafter, the operation of this application example will be described with reference to the drawings.

When the driver wants to operate the parking brake, when a predetermined operation switch (not shown) is turned on, a control signal of the switch is transmitted to the control unit 40 to rotate the driving motor 20.

Then, the nut gear 51 may be rotated while the drive gear 22 and the first and second reduction gears 31 and 32 connected to the output side of the drive motor 20 rotate sequentially. . At this time, since the screw member 4 is fixed to the female thread provided in the center of the nut gear 51 is fixed to the first connection member 3 is coupled to the first cable 1 at one end, According to the rotation direction of the nut member 52, the screw member 4 can move in the axial direction shown by the arrow in FIG. Then, the first cable 1 may be pulled inwardly of the housing 10.

On the other hand, since the second cable 2 is hooked to the sensor 100 connected to the nut member 52 by the second connecting member 2a, the nut member 52 is connected to the nut gear 51. When the screw member 4 moves in the direction of the arrow of FIG. 1 while rotating according to the rotation, the nut member 52 is moved in the direction opposite to the arrow, so that the second cable 2 also has It can be pulled inward.

As such, when the first and second cables 1 and 2 are pulled inwardly of the housing 10, the first and second connecting members 3 of the first and second cables 1 and 2 are connected. The brake unit (not shown) installed in the vehicle wheel coupled to the other end of the connecting part is operated, thereby restraining the wheel from rolling on the floor.

On the other hand, the control unit 40 detects the displacement caused by the pulling operation of the first and second cables (1) and (2) moving by the operation of the drive motor 20, the off time of the drive motor 20 Can be determined. At this time, in conjunction with the movement of the first and second cables (1) (2), the magnet unit 110 may move in the direction of the arrow of FIG. Then, the magnetic element 106 detects a change in the magnetic field of the magnet unit 110, outputs it to the controller 40, and the first and second cables 1 (1) in the controller 40 ( 2) to calculate the force required.

Thus, if the controller 40 is indirectly calculated that the brake unit is pulled to have sufficient braking force so that the first and second cables 1 and 2 do not rotate the wheels, then the controller 40 drives the drive. By stopping the operation of the motor 20, the parking brake device can be locked in a locked state.

The embodiments of the present invention described above and shown in the drawings should not be construed as limiting the technical idea of the present invention. The scope of protection of the present invention is limited only by the matters described in the claims, and those skilled in the art will be able to modify the technical idea of the present invention in various forms. Accordingly, such improvements and modifications will fall within the scope of the present invention as long as they are obvious to those skilled in the art.

One; First cable 2; 2nd cable
3; First connecting member 2a; Second connecting member
4; Screw member 5; Screw housing
10; A housing 20; Drive motor
21; A rotating shaft 22; Drive gear
30; Reduction gear unit 31; 1st reduction gear
32; Second reduction gear 40; The control unit
50; Cable pulling unit 51; Nut gear
52; Nut member 53; Sensor connection
110; Magnet unit 111; York
112; Magnet

Claims (7)

York;
A magnet installed in the yoke inner space; And
It is installed on the surface facing the magnet, the magnetic element for detecting a change in the magnetic force of the magnet; includes;
The yoke
The sensor facing the magnetic element of the magnet is open to expose the magnet.
The method of claim 1,
The yoke is formed of a metal material.
housing;
First and second cables, one end of which is connected to a brake unit installed on the vehicle wheel;
A drive motor installed inside the housing and generating power for pulling the first and second cables;
A reduction gear unit for transmitting rotational power of the drive motor;
A cable pulling unit which pulls the first and second cables in association with the rotation operation of the reduction gear unit; And
A sensor for sensing a force between the first and second cables; And
And a controller configured to control an on / off time point of the driving motor by using the detection signal of the sensor.
The sensor includes:
York;
A magnet installed in the yoke inner space; And
It is installed on the surface facing the magnet, the magnetic element for detecting a change in the magnetic force of the magnet; includes;
The yoke is an electronically controlled parking brake in which a magnet is exposed by opening a surface facing the magnetic element of the magnet.
The method of claim 3, wherein the yoke,
Electronically controlled parking brake made of metal.
The method of claim 3, wherein
The yoke and the magnet are moved in a direction parallel to the direction of movement of the first and second cables,
And the magnet is in proximity to the magnetic element when the first and second cables are pulled.
The method of claim 3, wherein
The yoke and the magnet are moved in a direction parallel to the direction of movement of the first and second cables,
And the magnet is away from the magnetic element when the first and second cables are pulled.
The method of claim 3, wherein the sensor,
A sensor housing having one end connected to a sensor connection part provided at the cable pulling unit, and the other end coupled to the second cable;
A magnet moving member in which the yoke and the magnet are installed; And
And a magnet elastic member for elastically supporting the movement of the magnet elastic member.
KR1020120064169A 2012-06-15 2012-06-15 Sensor and electronic parking brake having the same KR20130141073A (en)

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KR1020120064169A KR20130141073A (en) 2012-06-15 2012-06-15 Sensor and electronic parking brake having the same

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Application Number Priority Date Filing Date Title
KR1020120064169A KR20130141073A (en) 2012-06-15 2012-06-15 Sensor and electronic parking brake having the same

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202017102563U1 (en) 2016-10-17 2017-08-07 Hyundai Mobis Co., Ltd. Electronic parking brake device
KR20180089995A (en) 2017-02-02 2018-08-10 엘지이노텍 주식회사 Parking Brake Actuator

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20060039058A (en) * 2004-11-02 2006-05-08 엘지전자 주식회사 Apparatus and method for controlling day photograph mode and night photograph mode select in monitoring camera
KR20070021275A (en) * 2004-06-30 2007-02-22 가부시키가이샤 하이렉스 코포레이션 Electrically driven cable drive device and electric brake device
JP2007507198A (en) * 2003-09-25 2007-03-22 コンチネンタル・テベス・アーゲー・ウント・コンパニー・オーハーゲー DC motor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007507198A (en) * 2003-09-25 2007-03-22 コンチネンタル・テベス・アーゲー・ウント・コンパニー・オーハーゲー DC motor
KR20070021275A (en) * 2004-06-30 2007-02-22 가부시키가이샤 하이렉스 코포레이션 Electrically driven cable drive device and electric brake device
KR20060039058A (en) * 2004-11-02 2006-05-08 엘지전자 주식회사 Apparatus and method for controlling day photograph mode and night photograph mode select in monitoring camera

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202017102563U1 (en) 2016-10-17 2017-08-07 Hyundai Mobis Co., Ltd. Electronic parking brake device
US10378603B2 (en) 2016-10-17 2019-08-13 Hyundai Mobis Co., Ltd. Electronic parking brake apparatus
US11143254B2 (en) 2016-10-17 2021-10-12 Hyundai Mobis Co., Ltd. Electronic parking brake apparatus
US11746845B2 (en) 2016-10-17 2023-09-05 Hyundai Mobis Co., Ltd. Electronic parking brake apparatus
KR20180089995A (en) 2017-02-02 2018-08-10 엘지이노텍 주식회사 Parking Brake Actuator

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