KR20190108261A - Break oil pressure control device for break system - Google Patents

Abstract

An oil pressure control device for a brake system is disclosed. According to an embodiment of the present invention, the oil pressure control device comprises: a modulator block having a motor bore; and a motor having a cover covering an opening of a case in which a stator and a rotor are embedded and supported at one side of the modulator block. Moreover, a vent hole is formed in the cover for an air flow of the inside and the outside of the motor, and a communication flow path enabling the motor bore and the vent hole to communicate with each other is formed in the modulator block.

Description

Hydraulic control system of brake system {BREAK OIL PRESSURE CONTROL DEVICE FOR BREAK SYSTEM}

The present invention relates to a hydraulic control device of the brake system, and more particularly to a hydraulic control device of the brake system for preventing oil from flowing into the motor mounted on the modulator block.

In general, the electronically controlled brake system effectively prevents the slip of the vehicle and obtains a strong and stable braking force.An anti-lock brake system (ABS) that prevents the sliding of the wheel during braking and The Brake Traction Control System (BTCS) prevents slippage of the drive wheel during sudden start or acceleration, and the anti-lock brake system and traction control combine to control the brake hydraulic pressure to keep the vehicle stable. A vehicle dynamic control system (VDC) and the like are disclosed.

The electronically controlled brake system includes a modulator block having a plurality of solenoid valves, an accumulator and a pair of pumps, an ECU mounted to cover one side of the modulator block and controlling an electrically operated component, and the other side of the modulator block. Coupled and including a motor to drive a pair of pumps.

The modulator block is a rectangular parallelepiped block made of aluminum, and a plurality of solenoid valves are mounted on one side thereof to substantially control the braking hydraulic pressure to the hydraulic brake side. These solenoid valves are divided into NO type solenoid valves connected to the upstream side of the hydraulic brake and NC type solenoid valves connected to the downstream side, which are controlled by the ECU.

The ECU is equipped with a circuit board disposed inside and covers one side of the modulator block in which the solenoid valve is installed.The ECU detects the vehicle speed through each wheel sensor mounted on the front wheel and the rear wheel, and thereby opens and closes each solenoid valve. To control.

On the other hand, the motor is installed on one side of the modulator block, the rotating shaft for transmitting the rotational force extends to the modulator block. The rotating shaft is supported by a bearing installed in the motor, and the tip of the rotating shaft is composed of an eccentric portion in which needle bearings are installed.

A small amount of oil may leak while pumping oil from the modulator block. This can be introduced into the motor through the gap of the bearing, thereby causing a malfunction of the motor due to electrical conduction failure occurs inside the motor.

Korean Patent Publication No. 2003-0008040 (published Jan. 24, 2003)

Embodiments of the present invention to provide a hydraulic control device of the brake system that can reduce the oil leakage from the modulator block flow into the motor.

According to an aspect of the present invention, it includes a modulator block having a motor bore, a case in which a stator and a rotor are embedded, and a motor having a cover covering the opening of the case and supported on one side of the modulator block, the cover A vent hole for air flow in and out of the motor is formed in the motor, and the modulator block may be provided with a hydraulic control device of a brake system in which a communication flow path for communicating the motor bore with the vent hole is formed.

In addition, a pass groove forming an air movement path connected to the communication flow path between the modulator block and the cover may be formed on a support surface of the cover supported on one side of the modulator block.

In addition, the vent hole may be located in the pass groove.

In addition, the cover is provided with an oil receiving portion for storing the oil flowing through the communication passage, the pass groove may be in communication with the oil receiving portion.

In addition, the communication passage includes a first vertical bore positioned directly above the oil receiving portion, and a first horizontal bore connecting the first vertical bore and the motor bore.

In addition, the oil receiving portion may be provided in a concave recessed form on the support surface of the cover.

In addition, a cylindrical partition wall surrounding the front bearing is formed at the center of the cover, and the pass groove may be formed in an arc shape extending along the edge of the cylindrical partition wall.

The communication passage further includes a second vertical bore positioned directly above the vent hole, and a second horizontal bore connecting the second vertical bore and the motor bore.

In addition, a central portion of the cover has a fence portion extending along the circumference of the shaft hole through which the rotating shaft of the motor passes, a seating portion extending along the inner circumference of the partition wall so that the front bearing is supported, and between the seating portion and the fence portion. Is formed in the concave and comprises a groove portion connected to the oil receiving portion.

In addition, when the motor is mounted on the modulator block, the oil receiving part may be positioned below the center axis of the cover, and the vent hole may be positioned above the center axis of the cover.

Embodiments of the present invention can prevent the oil leaking from the pump side of the modulator block into the motor to prevent the motor failure and at the same time improve the overall product reliability of the brake system.

1 is an exploded perspective view of a hydraulic control device of a brake system according to an embodiment of the present invention.
2 is a cross-sectional view of a hydraulic control device of a brake system according to an embodiment of the present invention.
3 is a perspective view illustrating a cover of a motor according to an exemplary embodiment of the present invention.
4 is an enlarged view of a portion A of FIG. 2.
5 is a cutaway view of a portion of the hydraulic control apparatus according to an embodiment of the present invention.
6 is a cross-sectional view showing a portion of the communication flow path provided in the modulator block of the hydraulic control apparatus according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments introduced below are provided as an example to sufficiently convey the spirit of the present invention to those skilled in the art to which the present invention pertains. The present invention is not limited to the embodiments described below and may be embodied in other forms. Parts not related to the description are omitted in the drawings in order to clearly describe the present invention, in the drawings, the width, length, thickness, etc. of the components may be exaggerated for convenience. Like numbers refer to like elements throughout.

1 is an exploded perspective view of a hydraulic control device of a brake system according to an embodiment of the present invention, Figure 2 is a cross-sectional view of the hydraulic control device of a brake system according to an embodiment of the present invention.

1 and 2, the hydraulic control device 10 of the brake system according to an embodiment of the present invention is a modulator block 20, which is provided with a solenoid valve, an accumulator and a pump for controlling braking hydraulic pressure, and a modulator block ECU housing is mounted to cover one side of the 20, and the motor 30 is coupled to the other side of the modulator block 20 to drive the pump.

The modulator block 20 is a block having a rectangular parallelepiped shape, and a plurality of solenoid valves for controlling braking hydraulic pressure are mounted therein, and the plurality of solenoid valves are opened and closed according to the control operation of the ECU and are delivered to the hydraulic brake side. To control.

The modulator block 20 is provided with a pump mounting bore 21 for mounting a pair of pumps symmetrically on both sides, the pump mounting bore 21 is provided with a piston for compression pumping the oil by linear reciprocating motion.

Between the pair of pump mounting bores 21 formed in the modulator block 20, a motor bore 22 in which a needle bearing 31 for operating a piston by driving the motor 30 is positioned.

The motor 30 may be mounted on one side of the modulator block 20 through a mounting bolt.

The motor 30 includes a cylindrical case 40 having an opening on one surface thereof, and a cover 50 mounted to cover the opening of the case 40.

In the case 40, a stator 32 and a rotor 33 which rotates in interaction with the stator 32 are embedded, and the center of the rotor 33 is press-fitted in the axial direction so that the rotor 33 and It is provided with a rotating shaft 34 which rotates together and has an eccentric portion at its end.

The rotating shaft 34 protrudes through the shaft hole 51 formed in the center of the cover 50, and the eccentric portion of the rotating shaft 34 is positioned in the motor bore 22 when the motor 30 is mounted on the modulator block 20. .

The needle bearing 31 for driving the piston installed in the pump mounting bore 21 is coupled to the eccentric portion of the rotary shaft 34.

The front bearing 35 is installed in the center of the cover 50 so as to allow the rotation shaft 34 to rotate smoothly, and the rear center of the bottom of the case 40 rotatably supports the end of the rotation shaft 34. Bearing 36 is installed.

In addition, one end of the case 40 is elastically supported by a spring 38 provided in the brush holder 37a, and the other end is provided with a brush 37 in contact with the commutator 39.

When the rotating shaft 34 rotates according to the driving of the motor 30, the needle bearing 31 coupled to the rotating shaft 34 reciprocates the piston of the pump installed in the pump mounting bore 21 to pump oil. do.

On the other hand, the temperature difference between the case 40 and the inside of the modulator block 20 is generated by the heat generated when the motor 30 is driven, and due to the pressure difference, the front bearing 35 or the front bearing 35 Oil flowing out of the pump through the gap between the cover 50 may be introduced into the case 40, which may cause a problem in driving the motor by inducing a poor conduction between the brush 37 and the commutator 39. have.

To solve this, the hydraulic control device 10 of the brake system of the present embodiment may have an air circulation structure for eliminating the temperature difference between the modulator block 20 and the case 40.

3 is a perspective view illustrating a cover of a motor according to an embodiment of the present invention, FIG. 4 is an enlarged view of a portion A of FIG. 2, and FIG. Incision is also.

3 to 5, in order to form an air flow in the modulator block 20 and the case 40, the cover 50, which is mounted to cover the opening of the case 40, may be provided in or out of the case 40. Vent holes 52 may be formed to communicate with each other, and a communication passage 60 may be formed in the modulator block 20 to communicate between the vent holes 52 and the motor bore 22.

In addition, the cover 50 may be formed with a pass groove 53 for forming a flow path for communicating the vent hole 52 and the communication passage 60 between the modulator block 20 and the cover 50.

Therefore, when the motor 30 is mounted on the modulator block 20, the air inside the case 40 is discharged to the outside of the case 40 through the vent hole 52 formed in the cover 50, and the modulator block 20 is provided. ) And flows through the pass groove 53 formed between the cover 50 and may flow into the motor bore 22 through the communication flow path 60.

Here, the pass groove 53 forming an air movement path between the modulator block 20 and the cover 50 is concave on the support surface 54 of the cover 50 supported on one side of the modulator block 20. Can be.

A shaft hole 51 through which the rotating shaft 34 of the motor 30 penetrates is formed in the central region of the cover 50, and the front bearing 35 may be seated around the shaft hole 51.

Around the shaft hole 51 is formed concave between the fence portion 55 extending along the circumference of the shaft hole, the seating portion 56 on which the front bearing 35 is supported, and the fence portion 55 and the seating portion 56. Grooves 57 may be formed.

The outer ring 35a of the front bearing 35 is supported by the seating part 56, and the outer ring 35a of the front bearing 35 is supported by the partition 58 extending upward along the outer edge of the seating part 56. Is surrounded by.

The seating portion 56 is positioned at a position facing the outer ring 35a of the front bearing 35, the fence portion 55 is positioned at a position facing the inner ring 35b of the front bearing 35, and the groove portion ( 57 is located at a position facing the ball member 35c of the front bearing 35.

The fence part 55 has a height lower than that of the seating part 56 so that the inner ring of the front bearing 35 can rotate, and the groove part 57 is disposed between the seating part 56 and the fence part 55. It is formed in a concave recessed shape so that oil leaking through the ball member 35c remains in the groove portion 57 to prevent the oil from flowing into the case 40 through the shaft hole 51.

One side of the support surface 54 of the cover 50 is formed in a concave concave shape may be formed with an oil accommodating portion 59 for storing the leaked oil.

The oil accommodating part 59 may be located below the outlet 58a having a shape cut into a predetermined size on one side of the partition 58.

The pass groove 53 extends along the circumferential direction at the outside of the partition wall 58 and may be formed in a concave shape in the support surface 54 of the cover 50.

The pass groove 53 may be formed in an arc shape, and the vent hole 52 may be positioned at one side of the bottom of the pass groove 53.

When the motor 30 is mounted on the modulator block 20, the vent hole 52 may have an oil receiving portion 59 positioned below the axis x (see FIG. 1) passing through the center of the cover 50. May be located at the top.

In addition, the pass groove 53 may be provided to communicate with the oil receiving portion 59 provided in the cover 50. Through this, the air inside the case 40 leaked through the vent hole 52 may flow along the pass groove 53 and then flow into the oil receiving part 59.

The communication passage 60 formed in the modulator block 20 may be positioned above the oil receiving portion 59 to communicate with the oil receiving portion 59.

The communication passage 60 includes a first vertical bore 61 positioned directly above the oil receiving part 59, and a first horizontal bore 62 connecting the first vertical bore 61 and the motor bore 22. It includes.

The communication passage 60 formed of the first vertical bore 61 and the first horizontal bore 62 has an oil leakage portion 59 provided on the cover 50 with oil leaking to the motor bore 22 side when the pump is operated. It serves to allow air flow between the motor bore 22 and the oil receiving portion 59 while serving as a passage to fall.

Through this configuration, the inside of the case 40 of the motor 30 and the inside of the motor bore 22 are vent holes 52, a pass groove 53, and an oil accommodating part 59 as shown by the arrows in FIGS. 3 and 5. As the air circulates through each other through the communication path 60 and), the temperature difference between the inside of the case 40 and the motor bore 22 is eliminated, and into the case 40 according to the pressure difference between the two spaces. The oil inflow can be reduced.

On the other hand, the modulator block 20 may be further provided with a communication passage for smooth air circulation inside the case 40 and the motor bore 22.

6 is a cross-sectional view showing a portion of the communication flow path provided in the modulator block of the hydraulic control apparatus according to another embodiment of the present invention. Hereinafter, the same reference numerals are assigned to components having the same function, and detailed description thereof will be omitted.

The communication flow path formed in the modulator block 20 has a second horizontal bore 63 positioned directly above the vent hole 52, and a second horizontal bore connecting the second vertical bore 63 and the motor bore 22. It may further include a bore 64.

As a result, the inside of the motor bore 22 is the first air passing through the first horizontal bore 62, the first vertical bore 61, the oil receiving part 59, the pass groove 53, and the vent hole 52. Through the movement path, the second horizontal bore 64, the second vertical bore 63, and the second air movement path via the vent hole 52, it is possible to communicate with the inside of the case 40.

In such a case, the position of the vent hole 52 and the shape of the pass groove 53 formed in the cover 50 may be appropriately changed according to the position of the communication passage.

In the above, specific embodiments have been illustrated and described. However, the present invention is not limited only to the above embodiments, and those skilled in the art may make various changes without departing from the gist of the technical idea of the invention described in the claims below.

10: hydraulic controller, 20: modulator block,
22: motor bore, 30: motor,
31: needle bearing, 32: stator,
33: rotor, 34: axis of rotation,
35: front bearing, 40: case,
50: cover, 51: axle,
52: vent hole, 53: passhome,
54: support surface, 55: fence portion,
56: seating part, 57: groove part,
58: bulkhead, 59: oil holding part,
60: communication flow path, 61: first vertical bore,
62: first horizontal bore, 63: second vertical bore,
64: second horizontal bore.

Claims (10)

A modulator block having a motor bore; And
And a motor having a case in which a stator and a rotor are built, and a cover covering the opening of the case and supported on one side of the modulator block.
The cover is formed with a vent hole for air flow in and out of the motor, the hydraulic control device of the brake system is formed in the modulator block communication passage for communicating the motor bore and the vent hole. The method of claim 1,
The support surface of the cover supported on one side of the modulator block, the hydraulic control device of the brake system is formed a pass groove for forming an air movement path connected to the communication flow path between the modulator block and the cover. The method of claim 2,
The hydraulic control device of the brake system in which the vent hole is located in the pass groove. The method of claim 3,
The cover is provided with an oil receiving portion for storing the oil flowing through the communication passage, the pass groove is a hydraulic control device of the brake system in communication with the oil receiving portion. The method of claim 4, wherein
The communication passage includes a first vertical bore positioned directly above the oil receiving portion, and a first horizontal bore connecting the first vertical bore and the motor bore. The method of claim 4, wherein
The oil receiving portion of the hydraulic control device of the brake system is provided in a concave recessed form on the support surface of the cover. The method of claim 4, wherein
In the center of the cover is formed a cylindrical partition wall surrounding the front bearing,
And the pass groove has an arc shape extending along an edge of the cylindrical partition wall. The method of claim 5,
The communication passage further includes a second vertical bore positioned directly above the vent hole, and a second horizontal bore connecting the second vertical bore and the motor bore. The method of claim 7, wherein
In the central region of the cover is a fence portion extending along the circumference of the shaft hole through which the rotating shaft of the motor passes, a seating portion extending along the inner circumference of the partition wall so that the front bearing is supported, between the seating portion and the fence portion The hydraulic control device of the brake system is formed concave and comprises a groove portion connected to the oil receiving portion. The method of claim 4, wherein
When the motor is mounted on the modulator block, the oil receiving portion is positioned below the center axis of the cover, and the vent hole is located above the center axis of the cover of the hydraulic control device of the brake system.

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