KR20110055802A - Parking brake system - Google Patents

Parking brake system Download PDF

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Publication number
KR20110055802A
KR20110055802A KR1020090112367A KR20090112367A KR20110055802A KR 20110055802 A KR20110055802 A KR 20110055802A KR 1020090112367 A KR1020090112367 A KR 1020090112367A KR 20090112367 A KR20090112367 A KR 20090112367A KR 20110055802 A KR20110055802 A KR 20110055802A
Authority
KR
South Korea
Prior art keywords
nut member
nut
spindle
spring
parking brake
Prior art date
Application number
KR1020090112367A
Other languages
Korean (ko)
Inventor
김진라
Original Assignee
주식회사 만도
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 주식회사 만도 filed Critical 주식회사 만도
Priority to KR1020090112367A priority Critical patent/KR20110055802A/en
Publication of KR20110055802A publication Critical patent/KR20110055802A/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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
    • F16D65/16—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake
    • F16D65/18—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together, e.g. for disc brakes
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2121/00—Type of actuator operation force
    • F16D2121/18—Electric or magnetic
    • F16D2121/24—Electric or magnetic using motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2125/00—Components of actuators
    • F16D2125/18—Mechanical mechanisms
    • F16D2125/44—Mechanical mechanisms transmitting rotation
    • F16D2125/46—Rotating members in mutual engagement

Abstract

A parking brake system, comprising: a nut member interlocked with a drive unit and installed relative to the drive unit; a spindle member interlocked with the nut member and installed relative to the nut member; and a spindle. An operation cable coupled to the member and moving together with the spindle member; and an operation member installed to allow relative movement with respect to the housing by the nut member; and applied to the operation cable using a relative displacement between the housing and the operation member. It is configured to include; a force measuring unit for measuring the force.

Description

Parking brake system {PARKING BRAKE SYSTEM}

The present invention relates to a parking brake system, and more particularly, to a parking brake system for activating and releasing an operation cable of a parking brake device using an electric motor.

The brake device may include a main brake device used for deceleration or stop of the vehicle while driving, and a parking brake device used to maintain the stopped state after stopping the vehicle.

Brake devices are hydraulic and mechanical. The main brake device is hydraulic using a working fluid, and the parking brake device is generally mechanical using a working cable. These are all manually operated.

On the other hand, the parking brake device may be configured to automatically pull or loosen the operation cable using the electric motor, it is possible to measure the tension of the operation cable by measuring the current flowing in the electric motor. However, the current measurement value may vary depending on the internal / external environment, and it is impossible to measure the tension of the operation cable when the electric motor is not operated.

The present invention discloses a parking brake system capable of accurately measuring the force applied to the actuation cable.

The parking brake system according to the spirit of the present invention includes a housing; a drive unit having an electric motor; and a nut member interlocked with the drive unit and installed relative to the drive unit; and interlocked with the nut member. A spindle member installed relative to the nut member and an actuation cable coupled to the spindle member and moving together with the spindle member; and a nut member installed relative to the housing by the nut member. And a force measuring unit measuring a force applied to the actuation cable by using a relative displacement between the housing and the actuation member.

In addition, the nut member and the spindle member is moved along the axial direction, it characterized in that the movement in the opposite direction by the action / reaction.

The force measuring unit may include a spring member elastically supported between the housing and the operating member, a Hall sensor installed in the housing, and a magnet installed on the operating member.

In addition, a bearing member is installed between the nut member and the operating member, so that the operating member is moved in the axial direction.

In addition, the nut member is characterized in that it further comprises a flange for increasing the contact area with the bearing member.

The spring member may include a first spring and a second spring. When the actuation cable is deactivated, the first spring is not supported by the actuation member, and the second spring is supported by the actuation member. It features.

The driving unit may rotate the nut member in one direction when operating the operation cable, and rotate the nut member in another direction when releasing the operation cable.

Parking brave system according to the spirit of the present invention comprises the steps of (a) rotating the nut member by the drive unit; and (b) moving the spindle member connected to the operation cable by the nut member in the axial direction; and (c) moving the nut member in a direction opposite to the spindle member by the spindle member; and (e) moving the operating member in the same direction as the nut member by the nut member; and (f) And measuring the displacement of the actuating member by the force measuring unit.

Here, (g) the operating member is elastically supported by a spring member, pressing the operating member toward the nut member; characterized in that it further comprises.

Parking brake system according to an embodiment of the present invention has the effect that can accurately measure the tension applied to the actuation cable.

Hereinafter, a parking brake system according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing a parking brake device according to an embodiment of the present invention, Figure 2 is a cross-sectional view showing a parking brake device according to an embodiment of the present invention. In particular, Figures 1 and 2 show a state in which the parking brake device is deactivated.

As shown in Figure 1 and 2, the parking brake device 1 according to an embodiment of the present invention is the housing 10, the drive unit 20, the nut member 30, the spindle member 40, the operating cable 41, the operating member 70 and the force measuring unit 60 may be configured to include. The parking brake device 1 can be configured to brake the wheel by pulling or releasing the actuation cable 41 using these components.

The housing 10 may be installed in the vehicle body. It is possible to provide a predetermined space so that other components of the parking brake device 1 can be installed. The housing 10 may include a first housing 11 and a second housing 12. The first housing 11 may include a drive unit 20, a nut member 30, and a spindle member 40. The second housing 12 may be installed, the operation member 70 and the force measuring unit 60 may be installed.

The drive unit 20 can rotate the nut member 30 forward or reverse. The drive unit 20 may include an electric motor 21 and a reduction gear unit 22. The reduction gear unit 22 may be installed in engagement with the connecting gear 31 of the nut member 30, and the nut member 30 may be rotated forward or reverse by the power direction of the electric motor 21. . Herein, when the nut member 30 is rotated forward, the brake is operated, and when the reverse rotation is performed, the brake is released.

The nut member 30 can move the spindle member 40 in the axial direction. The nut member 30 is fastened to the spindle member 40 by screwing. This structure allows the nut member 30 and the spindle member 40 to function as a self-locking. That is, when no force is applied to the nut member 30 or the spindle member 40, the nut member 30 and the spindle member 40 are limited to move in the axial direction even if there is no separate fixing device.

In addition, when the nut member 30 moves the spindle member 40 along the axial direction, the nut member 30 is opposite to the moving direction of the spindle member 40 by the action / reaction with the spindle member 40. Will be moved to. In this way, the nut member 30 and the spindle member 40 can be configured to move in the opposite direction by the action / reaction force, by using this phenomenon can accurately measure the force applied to the actuation cable 41 . That is, the spindle member 40 is configured to move together with the operation cable 41, the force applied to the operation cable 41 acts as a reaction force on the nut member (30). Therefore, when measuring the reaction force applied to the nut member 30, the force (acting force) applied to the actuation cable 41 can be obtained.

The operating member 70 may be installed in the second housing 12 so as to reciprocate. Since the bearing member 71 is provided between the actuating member 70 and the spindle member 40, the rotational force of the nut member 30 is not transmitted to the actuating member 70, but the axial force of the nut member 30 is provided. It is transmitted to the operating member 70.

In addition, the operation member 70 is elastically supported by the second housing 12 by the spring member 50. The spring member 50 may include a first spring member 51 and a second spring member 52. As shown in FIG. 2, a predetermined gap may be formed between the first spring member 51 and the operating member 70 while the brake is released. Even in this case, the second spring member 52 may elastically support the operating member 70. Here, the first elastic modulus k1 of the first spring member 51 and the second elastic modulus k2 of the second spring member 52 are set to predetermined values, respectively, and the first elastic modulus k1 is set to a first value. It may be set to have a value about 100 times larger than the two modulus of elasticity (k 2).

On the other hand, the magnet (61) (magnet) is installed in the operating member 70, the hall sensor 62 may be installed in the second housing 12. The magnet 61 moves together with the operating member 70 to generate a displacement. The hall sensor 62 measures a magnetic force generated according to a relative displacement with the magnet 61 to displace the magnet 61 with the magnet 61. Can be measured. As a result, it is possible to measure the displacement of the operating member 70 using the Hall sensor 62 and the magnet 61, it is possible to measure the displacement of the spring member 50. As a result, since the displacement and elastic modulus of the spring member 50 can be known, the force F acting on the spring member 50 can be obtained. This is a value corresponding to the reaction force acting on the actuating member 70 and a value corresponding to the tension acting on the actuation cable 41.

As such, the spring member 50, the hall sensor 62 and the magnet 61 may constitute a force measuring unit 60. Therefore, even if the electric current of the electric motor 21 is not measured, the force applied to the operation cable 41 can be obtained, and even if the electric motor 21 is not operated, the force applied to the operation cable 41 can be obtained.

Figure 3 shows an initial operating state of the parking brake apparatus according to an embodiment of the present invention, Figure 4 shows a state in which the operation of the parking brake apparatus according to an embodiment of the present invention is completed, Figure 5 shows the present invention In accordance with an embodiment of the parking brake device according to the state before the operation is completed is shown.

The parking brake device 1 is not applied to the actuation cable 41 in the state in which the operation is completed as shown in FIG. At this time, the first spring member 51 maintains a predetermined distance G from the operating member 70 by the second spring member 52. Thereafter, as shown in FIG. 3, when the nut member 30 is rotated in the forward direction by operating the electric motor 21, the nut member 30 pressurizes the operating member 70 by the action / reaction with the spindle member 40. And, the operation member 70 is to press the first spring member 51. At this time, since the elastic modulus of the spring member 50 changes abruptly, the controller (not shown) may determine that tension is applied to the operation cable 41. Then, as shown in Figure 4, the control unit continues to operate the electric motor 21 until the force applied to the actuation cable 41 reaches a force enough to operate the brake normally. That is, the force applied to the actuation cable 41 can be checked by checking the displacement of the spring member 50 by using the hall sensor 62 and the magnet 61 and obtaining the force acting on the spring member 50. Can be. When the measured force (that is, the force applied to the operation cable 41) reaches a predetermined value, the controller (not shown) stops supplying current to the electric motor 21. In this case, since the spindle member 40 and the nut member 30 perform a self-locking function, the actuation cable 41 can be prevented from loosening.

 It is possible to release the actuation cable 41 to deactivate the parking brake device 1. By biasing the current to the electric motor 21, the drive unit 20 rotates the nut member 30 in the reverse direction, and as the nut member 30 rotates in the reverse direction, the nut member 30 moves in the right direction. , The spindle member 40 moves in the left direction. At this time, the operation member 70 is also moved to the right direction by the elastic restoring force to the spring member 50. When the operation member 70 moves to the right direction by a predetermined displacement as shown in FIG. 5, the first spring member ( The state is not supported by 51). At this time, since the operating member 70 is supported only by the second spring member 52, the elastic modulus is changed rapidly, and the control unit can determine that the operating cable 41 is released. Thereafter, as shown in FIG. 2, the operating member 70 is set by the second spring member 52 to maintain a predetermined distance G from the first spring member 51, and the brake operation release may be completed.

1 is a perspective view showing a parking brake device according to an embodiment of the present invention.

2 is a cross-sectional view showing a parking brake apparatus according to an embodiment of the present invention.

Figure 3 shows the initial operating state of the parking brake apparatus according to an embodiment of the present invention.

Figure 4 shows the state in which the operation of the parking brake apparatus according to an embodiment of the present invention is completed.

5 is a view illustrating a state before the operation of the parking brake device is released according to an embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

1: parking brake device 10: housing

20: drive unit 30: nut member

40: spindle member 41: operating cable

50: spring member 60: force measuring device

70: operating member

Claims (9)

Housing; and A drive unit having an electric motor; and A nut member interlocked with the driving unit and installed to allow relative movement with respect to the driving unit; and A spindle member interlocked with the nut member and installed to allow relative movement with respect to the nut member; and An operation cable coupled to the spindle member and moving together with the spindle member; and An operation member installed to allow relative movement with respect to the housing by the nut member; and A force measuring unit measuring a force applied to the actuation cable by using a relative displacement between the housing and the actuation member; Parking brake device comprising a. The method of claim 1, The nut member and the spindle member is moved along the axial direction, the parking brake device, characterized in that in the opposite direction by the action / reaction. The method of claim 1, The force measuring unit, And a spring member elastically supported between the housing and the operating member, a Hall sensor installed in the housing, and a magnet installed on the operating member. The method of claim 3, A bearing member is installed between the nut member and the actuating member to move the actuating member in the axial direction. The method of claim 4, wherein The nut member further comprises a flange for increasing the contact area with the bearing member. The method of claim 3, The spring member includes a first spring and a second spring, And the first spring is not supported by the actuating member when the actuation cable is deactivated, and the second spring is supported by the actuating member. The method of claim 1, And the driving unit rotates the nut member in one direction when operating the operation cable, and rotates the nut member in another direction when releasing the operation cable. (a) rotating the nut member by the drive unit; and (b) moving the spindle member connected to the operation cable by the nut member in an axial direction; and (c) moving the nut member in a direction opposite to the spindle member by the spindle member; and (e) moving the operating member by the nut member in the same direction as the nut member; and (f) measuring the displacement of the operating member by the force measuring unit;  Parking brake operation method comprising a. The method of claim 6, (g) the operating member is elastically supported by a spring member, pressing the operating member toward the nut member; parking brake operation method further comprising.
KR1020090112367A 2009-11-20 2009-11-20 Parking brake system KR20110055802A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020090112367A KR20110055802A (en) 2009-11-20 2009-11-20 Parking brake system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020090112367A KR20110055802A (en) 2009-11-20 2009-11-20 Parking brake system

Publications (1)

Publication Number Publication Date
KR20110055802A true KR20110055802A (en) 2011-05-26

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020090112367A KR20110055802A (en) 2009-11-20 2009-11-20 Parking brake system

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103105258A (en) * 2011-11-14 2013-05-15 株式会社万都 Sensor unit for measuring braking power of parking cable and electronic parking brake
CN104554204A (en) * 2013-10-21 2015-04-29 程洪武 Novel guyed electronic parking system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103105258A (en) * 2011-11-14 2013-05-15 株式会社万都 Sensor unit for measuring braking power of parking cable and electronic parking brake
KR101303760B1 (en) * 2011-11-14 2013-09-04 주식회사 만도 Sensor unit for measuring braking power of parking cable and electronic parking brake with the same
US9285285B2 (en) 2011-11-14 2016-03-15 Mando Corporation Sensor unit for measuring brake force of parking cable and electronic parking brake with the same
CN104554204A (en) * 2013-10-21 2015-04-29 程洪武 Novel guyed electronic parking system

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A201 Request for examination
E601 Decision to refuse application