KR20160123412A - Hydraulic supply device - Google Patents

Hydraulic supply device Download PDF

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Publication number
KR20160123412A
KR20160123412A KR1020150052962A KR20150052962A KR20160123412A KR 20160123412 A KR20160123412 A KR 20160123412A KR 1020150052962 A KR1020150052962 A KR 1020150052962A KR 20150052962 A KR20150052962 A KR 20150052962A KR 20160123412 A KR20160123412 A KR 20160123412A
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KR
South Korea
Prior art keywords
nut member
hydraulic pressure
piston
shaft
rotor
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Application number
KR1020150052962A
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Korean (ko)
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KR101673321B1 (en
Inventor
이영송
이찬희
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주식회사 만도
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Priority to KR1020150052962A priority Critical patent/KR101673321B1/en
Publication of KR20160123412A publication Critical patent/KR20160123412A/en
Application granted granted Critical
Publication of KR101673321B1 publication Critical patent/KR101673321B1/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
    • 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
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/40—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system
    • B60T8/4018—Pump units characterised by their drive mechanisms
    • 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
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/02—Arrangements of pumps or compressors, or control devices therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Transportation (AREA)
  • General Engineering & Computer Science (AREA)
  • Braking Systems And Boosters (AREA)
  • Regulating Braking Force (AREA)

Abstract

Disclosed is a hydraulic supply device. According to an aspect of the present invention, coupled to a valve block in which multiple valves are installed for adjusting braking hydraulic pressure conveyed to a wheel cylinder arranged in each wheel and generating braking hydraulic pressure by outputting a signal through a pedal displacement sensor which detects displacement of a brake pedal, the hydraulic supply device comprises: a motor including a stator and a rotor which generates rotational force by an electrical signal and having a receiving space in a center of the rotor; a power conversion unit disposed in the receiving space and coupled to a shaft which rotates together with the rotor to convert the rotational force into a linear motion; and a linear pump generating braking hydraulic pressure by being pressurized by the power conversion unit.

Description

[0001] Hydraulic supply device [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic pressure supply apparatus, and more particularly, to a hydraulic pressure supply apparatus capable of reducing the overall length of a hydraulic pressure supply apparatus provided in an electronic brake system.

The vehicle is essentially equipped with a brake system for braking. Recently, various types of systems have been proposed to obtain a more powerful and stable braking force. For example, an intelligent integrated brake (IDB) system has been proposed. The IDB system is proposed to generate stable and strong braking force by integrating the master booster and electronic stability control (ESC).

The integrated brake system includes a hydraulic pressure supply device for outputting an operation of a brake pedal through an electric signal through a pedal displacement sensor to operate the motor and convert the rotational force of the motor into a linear motion to generate a braking hydraulic pressure, A valve block provided with a plurality of valves for controlling the braking operation by a hydraulic pressure generated by a force generated by the hydraulic motor, and an electronic control unit for controlling the motor and the valves.

More specifically, in the integrated brake system, the hydraulic pressure supply device operates according to the operation of the brake pedal to generate the braking pressure required by the driver, and transmits the hydraulic pressure to the wheel cylinders provided on the respective wheels. At this time, the hydraulic pressure supply device includes a motor, a power converting unit having a screw and a nut for converting the rotational force resulting from the operation of the motor into linear motion, and a linear pump which is pressurized by the power converting unit. That is, the power conversion unit generates the braking pressure by pressing the piston of the linear pump.

However, since the hydraulic pressure supply apparatus as described above includes a motor for generating a hydraulic pressure, a linear pump, and a power conversion unit for converting the rotational force of the motor into a linear motion, are arranged in a straight line so that the overall length of the brake system becomes excessively long There is a problem.

However, the structure for connecting the motor to the power conversion unit is complicated, and it is difficult to utilize the installation space of the motor. Further, in order to generate the braking oil pressure even when the position of the motor is moved, a linear pump having a predetermined stroke or more must be realized. In this case, since the screw of the power converting unit for pressing the piston has a length longer than a certain length, And the problem of increase has not been solved.

US 2012-0112525 A1 (Honda motor co., Ltd) May 10, 2012.

The hydraulic pressure supply apparatus according to the embodiment of the present invention makes it possible to minimize the overall length of the brake system by disposing the power conversion unit in the hollow portion of the motor using the hollow motor.

According to an aspect of the present invention, there is provided a control apparatus for a vehicle, comprising: a valve block coupled to a valve block provided with a plurality of valves for regulating a braking hydraulic pressure transmitted to a wheel cylinder provided in each wheel and outputting a signal through a pedal displacement sensor for sensing a displacement of the brake pedal A motor having a rotor and a stator generating a rotational force by an electrical signal and having a housing space formed at the center of the rotor; A power converting unit disposed in the accommodating space and coupled to a shaft rotating together with the rotor to convert a rotational force into a linear motion; And a linear pump which is pressurized by the power conversion unit and generates a braking hydraulic pressure.

Further, the power conversion unit may be connected to the linear pump through the valve block in a straight line.

The power conversion unit may further include: a screw member that rotates in association with the shaft; A nut member engaged with the screw member and linearly moving along the rotation of the screw member to press the piston of the linear pump; And a sleeve for guiding movement of the nut member to prevent rotation of the nut member.

The sleeve may be provided with a groove or a projection in the longitudinal direction on the inner circumferential surface thereof, and the nut member may be provided with a rotation preventing portion formed with a protrusion or groove corresponding to the groove or protrusion formed in the sleeve.

In addition, the shaft and the nut member may be provided with a locking preventing structure, and the locking preventing structure may include a rotation locking protrusion protruding toward the nut member on the shaft and a locking protrusion protruding toward the shaft on the nut member .

The linear pump may include: a cylinder having a hydraulic chamber connected to the oil passage of the valve block; A piston slidably provided to pressurize the hydraulic chamber; And a return spring elastically supporting the piston.

The cylinder may also be coupled to the sleeve, and a portion of the piston may be disposed within the sleeve.

The piston may have an insertion groove into which a screw member is inserted, and an end of the piston may be connected to the nut member.

The hydraulic pressure supply apparatus according to an embodiment of the present invention has an effect that the total length of the brake system can be minimized by disposing the power conversion unit for converting the rotational force into linear motion in the central accommodation space of the motor.

In addition, a part of the piston for generating the braking hydraulic pressure is disposed in the sleeve of the power conversion unit, and the spindle unit is accommodated in the piston, thereby further reducing the overall length of the hydraulic supply device.

In addition, it is possible to prevent breakage of the hydraulic pressure supply device by providing a locking prevention structure between the shaft and the nut member in case of malfunction of the hydraulic pressure supply device.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention will be described in detail with reference to the following drawings, which illustrate preferred embodiments of the present invention, and thus the technical idea of the present invention should not be construed as being limited thereto.
1 is a sectional view showing a hydraulic pressure supply apparatus provided in a brake system according to a preferred embodiment of the present invention.
2 is a partially exploded perspective view showing a state in which a hydraulic pressure supply device according to a preferred embodiment of the present invention is installed in a central accommodation space of a motor.
3 is a perspective view showing a locking structure of a shaft and a nut member provided in a hydraulic pressure supply device according to a preferred embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The following embodiments are provided to fully convey the spirit of the present invention to a person having ordinary skill in the art to which the present invention belongs. The present invention is not limited to the embodiments shown herein but may be embodied in other forms. For the sake of clarity, the drawings are not drawn to scale, and the size of the elements may be slightly exaggerated to facilitate understanding.

FIG. 1 is a sectional view showing a hydraulic pressure supply device provided in a brake system according to a preferred embodiment of the present invention, and FIG. 2 is a partially exploded perspective view showing a state in which the hydraulic pressure supply device is installed in a central accommodation space of the motor.

1 and 2, a hydraulic pressure supply device 1 according to an embodiment of the present invention is installed in a valve block 10 and operates in accordance with a displacement of a brake pedal (not shown) to generate a braking hydraulic pressure to be. At this time, the valve block 10 is connected to a master cylinder (not shown) together with the hydraulic pressure supply device 1 to transmit the braking hydraulic pressure to a wheel cylinder (not shown) provided in each wheel. In order to control the braking hydraulic pressure transmitted to the wheel cylinder, the valve block 10 is provided with a passage therein, and a plurality of valves are installed in place. That is, the valve block 10 is connected to the master cylinder and the hydraulic pressure supply device 1 and serves to transmit the braking hydraulic pressure generated therefrom. Reference numeral 20 denotes a valve provided in the valve block 10 and an electronic control unit (ECU) for controlling the driving of the motor 100 of the hydraulic pressure supply device 1. Since the valve block 10 is a well-known technology widely used in a brake system, a detailed description thereof will be omitted.

According to an aspect of the present invention, a hydraulic pressure supply apparatus 1 includes a motor 100 coupled to a valve block 10, a power conversion unit 200 coupled to the motor 100 to convert a rotational force into a linear motion, And a linear pump 300 which is pressurized by the power conversion unit 200. [

The motor 100 is operated through an electrical signal of a pedal displacement sensor (not shown) that senses a displacement of the brake pedal in response to the pressure of the brake pedal. That is, the vehicle is rotated in the normal and reverse directions to generate a rotational force to perform the braking force required by the driver. The motor 100 includes a hollow motor having a rotor 120 and a stator 130 installed in the motor housing 110.

The rotor 120 has a cylindrical shape so that a receiving space 122 is formed at the center, and a magnet 121 is installed at predetermined intervals along the outer circumferential surface of the rotor 120. A power conversion unit 200 to be described later is disposed in the accommodation space 122. A shaft 125 which rotates together with the rotor 120 and is coupled with the power conversion unit 200 is installed on one side of the rotor 120, Respectively. That is, the shaft 125 serves as an input shaft for transmitting the rotational force generated from the rotor 120. The shaft 125 is positioned on the rear side of the motor housing 110 surrounding the rotor 120 and the stator 130 and is supported by bearings 112 rotatably mounted on the motor housing 110. [ And rotates together with the rotor 120.

The stator 130 is spaced apart from the rotor 120 by a predetermined distance to enclose the rotor 120. When a coil (not shown) is wound on the stator 130 and power is applied thereto, a repulsive force and attractive force are applied between the magnet 121 and the coil to rotate the rotor 120.

The power conversion unit 200 includes a screw member 210 coupled with the shaft 125 coupled to the accommodation space 122 of the hollow rotor 120 and a screw member 210 coupled with the screw member 210, And a sleeve 230 for guiding movement of the nut member 220 to prevent rotation of the nut member 220. At this time, the power conversion unit 200 is connected to the linear pump 300 through the valve block 10 in a straight line.

The screw member 210 is coupled to rotate with the shaft 125. The nut member 220 is engaged with the screw member 210 and linearly moves to press the piston 320 of the linear pump 300 to be described later. The nut member 220 is engaged with the sleeve 230 to prevent the nut member 220 from rotating so as to be linearly movable along the rotating direction of the screw member 210.

More specifically, the sleeve 230 has grooves or protrusions formed in the longitudinal direction on the inner circumferential surface thereof, and the nut member 220 may be formed with protrusions or grooves corresponding to grooves or protrusions formed in the sleeve 230. A groove 233 is formed in the inner peripheral surface of the sleeve 230 and a projection 223 is formed in the nut member 220. [ At this time, the nut member 220 may be coupled with the rotation preventing portion 222 formed with the protrusion 223, but the protrusion 223 may be integrally formed with the nut member 220. Due to the engagement of the protrusion 223 and the groove 233, the nut member 220 is restricted in rotation and linearly moved along the rotation direction of the screw member 210. Further, the nut member 220 can be stably linearly moved as the projection 223 is guided by the groove 233. [ The sleeve 230 is fixed to the motor 100, that is, the motor housing 110, passes through the valve block 10, and is connected to a linear pump 300, which will be described later.

The nut member 220 or the shaft 125 may be damaged if the nut member 220 moves excessively toward the shaft 125 due to a malfunction of the hydraulic pressure supply device 1. [ That is, as the nut member 220 continues to be in surface contact with the shaft 125, the nut member 220 and the shaft 125 may be locked. Accordingly, according to one aspect of the present invention, the shaft 125 and the nut member 220 are provided with an anti-lock structure. 3, the lock preventing structure includes a rotation stopping protrusion 126 protruding from the shaft 125 toward the nut member 220 and a locking stopping protrusion 126 protruding toward the shaft 125 from the nut member 220 226). At this time, the end of the rotation stopping jaw 126 is spaced apart from the nut member 220 by a predetermined distance, and the end of the fixing stopping jaw 226 is spaced apart from the shaft 125 by a predetermined distance. That is, when the nut member 220 moves toward the shaft 125 according to the rotation of the shaft 125, the rotation stopping jaw 126 rotates and contacts with the side surface of the fixing stopping jaw 226 to restrict rotation. As a result, the phenomenon that the shaft 125 and the nut member 220 are excessively pressed and locked can be solved.

The linear pump 300 includes a cylinder 310 in which a hydraulic chamber 312 is formed and a return spring 330 that elastically supports the piston 320 and the piston 320.

The cylinder 310 is installed in the valve block 10 and the cylinder 310 is coupled to the inside of the sleeve 230. The hydraulic pressure chamber 312 formed in the cylinder 310 is connected to an oil passage (not shown) formed in the valve block 10 and is provided to transmit braking hydraulic pressure generated from the hydraulic pressure chamber 312.

The piston 320 is slidably provided in the hydraulic chamber 312 so as to pressurize the hydraulic chamber 312. Specifically, a portion of the piston 320 is disposed within the sleeve 230. That is, as shown in the figure, the piston 320 is formed with an insertion groove 321 into which the screw member 210 is inserted. The end of the piston 320 is provided to be in contact with the nut member 220 and generates the braking hydraulic pressure as it is pressed by the nut member 220.

The linear pump 300 is connected to the power conversion unit 200 and the motor 100 in a straight line. That is, the power conversion unit 200 including the screw member 210 is disposed in the hollow portion of the motor 100, and the screw member 210 is received in the piston 320 disposed in the sleeve 230 The overall length of the hydraulic pressure supply device 1 can be minimized.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be understood that various modifications and changes may be made without departing from the scope of the appended claims.

1: Hydraulic supply device 100: Motor
120: Lot 122: Capacity space
126: rotation stop jaw 200: power conversion unit
210: screw member 220: nut member
222: rotation preventing portion 226: fixing jaw
230: Sleeve 300: Linear pump
320: piston 321: insertion groove

Claims (8)

A hydraulic pressure supply unit for outputting a signal through a pedal displacement sensor for detecting the displacement of the brake pedal and generating a braking hydraulic pressure; In the apparatus,
A motor having a rotor and a stator generating a rotational force by an electrical signal, and having a housing space formed at the center of the rotor;
A power converting unit disposed in the accommodating space and coupled to a shaft rotating together with the rotor to convert a rotational force into a linear motion; And
And a linear pump which is pressurized by the power converting unit to generate a braking hydraulic pressure. The method according to claim 1,
And the power conversion unit is connected to the linear pump through the valve block in a straight line. The method according to claim 1,
The power conversion unit includes:
A screw member that rotates in association with the shaft;
A nut member engaged with the screw member and linearly moving along the rotation of the screw member to press the piston of the linear pump; And
And a sleeve for guiding movement of the nut member to prevent rotation of the nut member. The method of claim 3,
Wherein the sleeve has grooves or protrusions formed on an inner circumferential surface thereof in the longitudinal direction thereof,
Wherein the nut member is provided with a rotation preventing portion formed with a protrusion or a groove corresponding to a groove or a projection formed in the sleeve. The method of claim 3,
The shaft and the nut member are provided with an anti-lock structure,
Wherein the lock preventing structure comprises a rotation locking protrusion protruding toward the nut member on the shaft and a locking protrusion protruding toward the shaft on the nut member. The method of claim 3,
In the linear pump,
A cylinder having a hydraulic chamber connected to the oil passage of the valve block;
A piston slidably provided to pressurize the hydraulic chamber; And
And a return spring elastically supporting the piston. The method according to claim 6,
The cylinder being coupled to the sleeve,
Wherein a portion of the piston is disposed within the sleeve. 8. The method of claim 7,
The piston is formed with an insertion groove into which a screw member is inserted,
And an end of the piston is connected to the nut member.
KR1020150052962A 2015-04-15 2015-04-15 Hydraulic supply device KR101673321B1 (en)

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KR101673321B1 KR101673321B1 (en) 2016-11-09

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190042810A (en) * 2017-10-17 2019-04-25 주식회사 만도 Actuator
KR101951594B1 (en) * 2018-04-12 2019-05-02 김점식 hydraulic powered car’s acceleration/retardation device and thereof method to drive
US10875516B2 (en) 2017-09-29 2020-12-29 Mando Corporation Actuator of electronic brake system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100381775B1 (en) * 1998-10-16 2003-06-18 주식회사 만도 Car electric brakes_
JP2007107704A (en) * 2005-10-17 2007-04-26 Advics:Kk Electric parking brake device
KR100729607B1 (en) * 2006-05-10 2007-06-18 주식회사 삼양감속기 Brake of electrical driving style for vehicle
US20120112525A1 (en) 2010-11-08 2012-05-10 Honda Motor Co., Ltd. Vehicle braking system
KR20130102924A (en) * 2012-03-08 2013-09-23 현대모비스 주식회사 Brake for vehicle

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100381775B1 (en) * 1998-10-16 2003-06-18 주식회사 만도 Car electric brakes_
JP2007107704A (en) * 2005-10-17 2007-04-26 Advics:Kk Electric parking brake device
KR100729607B1 (en) * 2006-05-10 2007-06-18 주식회사 삼양감속기 Brake of electrical driving style for vehicle
US20120112525A1 (en) 2010-11-08 2012-05-10 Honda Motor Co., Ltd. Vehicle braking system
KR20130102924A (en) * 2012-03-08 2013-09-23 현대모비스 주식회사 Brake for vehicle

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10875516B2 (en) 2017-09-29 2020-12-29 Mando Corporation Actuator of electronic brake system
KR20190042810A (en) * 2017-10-17 2019-04-25 주식회사 만도 Actuator
KR101951594B1 (en) * 2018-04-12 2019-05-02 김점식 hydraulic powered car’s acceleration/retardation device and thereof method to drive

Also Published As

Publication number Publication date
KR101673321B1 (en) 2016-11-09

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