KR20130051376A - Piston-pump of brake apparatus for vehicle - Google Patents

Piston-pump of brake apparatus for vehicle Download PDF

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Publication number
KR20130051376A
KR20130051376A KR1020110116678A KR20110116678A KR20130051376A KR 20130051376 A KR20130051376 A KR 20130051376A KR 1020110116678 A KR1020110116678 A KR 1020110116678A KR 20110116678 A KR20110116678 A KR 20110116678A KR 20130051376 A KR20130051376 A KR 20130051376A
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KR
South Korea
Prior art keywords
damper
piston
brake oil
sleeve
communication hole
Prior art date
Application number
KR1020110116678A
Other languages
Korean (ko)
Inventor
최영창
Original Assignee
현대모비스 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 현대모비스 주식회사 filed Critical 현대모비스 주식회사
Priority to KR1020110116678A priority Critical patent/KR20130051376A/en
Publication of KR20130051376A publication Critical patent/KR20130051376A/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
    • 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
    • B60T8/4022—Pump units driven by an individual electric motor
    • 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
    • B60T8/4031—Pump units characterised by their construction or mounting
    • 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
    • B60T8/4068—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 the additional fluid circuit comprising means for attenuating pressure pulsations
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/10—Valves; Arrangement of valves
    • F04B53/1002—Ball valves

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • General Engineering & Computer Science (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Reciprocating Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)

Abstract

The present invention relates to a piston pump of a vehicle braking device, a sleeve having one side open and a communication hole through a circumferential surface thereof, a piston for introducing brake oil into the sleeve and drawing into the sleeve and forcibly discharging the brake oil into the communication hole. In addition, an orifice channel connected to the communication hole and a orifice channel reducing the pulsation phenomenon are connected to the communication hole to reduce the pulsation phenomenon of the brake oil. It characterized in that it comprises a damper portion.
The present invention can realize a manufacturing cost reduction by reducing the number of parts of the piston pump, unlike the prior art, it is possible to reduce the pulsation phenomenon generated when the brake oil is discharged by connecting a damper to the piston pump separately.

Description

Piston pump of vehicle braking system {PISTON-PUMP OF BRAKE APPARATUS FOR VEHICLE}

The present invention relates to a piston pump of a vehicle braking device, and more particularly, to reduce the manufacturing cost by reducing the number of parts of the piston pump, and to connect the damper to the piston pump separately to prevent the pulsation generated when the brake oil is discharged. A piston pump of a vehicle braking device that can be reduced.

The brake system of the vehicle basically implements a braking function of the vehicle and, in recent years, efficiently and effectively prevents slippage of the vehicle to obtain a strong and stable braking force.Anti-lock brake system that prevents slippage of the wheel during braking ( Anti-Lock Brake System (ABS), Brake Traction Control System (BTCS) which prevents slippage of the drive wheel during sudden start or acceleration of the vehicle, and anti-lock brake system and traction control in combination Disclosed is a vehicle dynamic control system (VDC) for stably maintaining a running state of a vehicle by controlling.

Such a brake system includes a plurality of solenoid valves for controlling braking hydraulic pressure delivered to a hydraulic brake side mounted on a wheel of a vehicle, a pair of low pressure accumulators for temporarily storing oil discharged from the hydraulic brakes, and a low pressure accumulator oil. Motors and pumps for forced pumping, and solenoid valves and ECUs for controlling the operation of the motors. These components are compactly embedded in the modulator block. Therefore, the oil of the low pressure accumulator is transferred to the hydraulic brake or master cylinder assembly side by the driving of the pump. The pump is driven by a motor, and as the pump structure, publications of Korean Patent Laid-Open Nos. 10-2003-0067839 and 10-2008-0093717 and the like are proposed.

The conventional piston pump for brake system has a cap on the brake oil discharge side of the sleeve through which the piston enters and includes a large number of parts for controlling brake oil discharge inside the cap, thereby degrading assembling for assembling relatively many parts. However, there is a problem in that cost reduction is limited.

In addition, the piston pump for the conventional brake system has a problem in that the brake oil discharged through the cap generates a pulsation phenomenon by minimizing the distance of the passage of the brake oil by directly coupling the sleeve and the cap.

Therefore, there is a need to improve this.

The present invention has been made to improve the above problems, it is possible to realize the manufacturing cost reduction by reducing the number of parts of the piston pump, by connecting the damper to the piston pump separately to reduce the pulsation phenomenon generated during the discharge of the brake oil It is an object of the present invention to provide a piston pump of a vehicle braking device.

A piston pump of a vehicle braking device according to the present invention includes: a sleeve having one side open and a communication hole in a circumferential surface thereof, a piston part for introducing brake oil into the sleeve and drawing into the sleeve and forcibly discharging the brake oil into the communication hole. In order to reduce the pulsation phenomenon of the brake oil discharged from the communication hole, the orifice channel connected to the communication hole, and the orifice channel to reduce the pulsation phenomenon is connected to induce the discharge in the state to reduce the pulsation phenomenon of the brake oil It characterized in that it comprises a damper portion.

The damper part is connected to the orifice channel and the brake oil discharged through the communication hole is introduced into the damper body to form a discharge hole in the circumferential surface, the pushing force of the brake oil is provided provided inside the damper body Damper piston to induce the discharge of the brake oil by rising to the upper side of the discharge hole, and a damper elastic member provided inside the damper body to return the damper piston to the initial position when the pushing force of the brake oil is removed Include.

The damper body is characterized by having a damper cap to open and close the inside.

The inner diameter of the orifice channel is smaller than the inner diameter of the sleeve.

The inner diameter of the orifice channel is smaller than the inner diameter of the damper body.

The piston pump of the vehicle braking apparatus according to the present invention can realize a manufacturing cost reduction by reducing the number of parts of the piston pump, it is possible to reduce the pulsation phenomenon generated when the brake oil is discharged by connecting the damper to the piston pump separately.

1 is an internal view of a piston pump of a vehicle braking apparatus according to an embodiment of the present invention.
Figure 2 is an internal view showing a state in which brake oil flows into the sleeve of the piston pump of the vehicle braking device according to an embodiment of the present invention.
Figure 3 is an internal view showing a state in which the brake oil is introduced into and discharged into the damper body of the piston pump of the vehicle braking device according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the piston pump of the vehicle braking apparatus according to the present invention. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

1 is an internal view of a piston pump of a vehicle braking apparatus according to an embodiment of the present invention.

Figure 2 is an internal view showing a state in which brake oil flows into the sleeve of the piston pump of the vehicle braking device according to an embodiment of the present invention, Figure 3 is a piston pump of the vehicle braking device according to an embodiment of the present invention The inside view showing the state where the brake oil flows into and out of the damper body.

Referring to FIG. 1, the piston pump 100 of the vehicle braking apparatus according to the exemplary embodiment includes a sleeve 200, a piston part 300, and a damper part 500.

The sleeve 200 has a cylindrical shape and is formed to open one side along the axial direction. In addition, the sleeve 200 passes through the communication hole 210 in the circumferential surface. The sleeve 200 introduces brake oil into an open one side, and discharges and guides the brake oil introduced through the communication hole 210.

Of course, the sleeve 200 may be formed in a polygonal cylindrical shape instead of a cylindrical shape. In addition, the sleeve 200 is applicable to a variety of materials.

In addition, the piston part 300 serves to guide the inflow of the brake oil into the sleeve 200, and serves to forcibly discharge the brake oil temporarily stored in the sleeve 200 to the communication hole 210.

In particular, the piston 300 includes a piston 310 and an inlet valve (320).

The piston 310 has an inner space 312 open to the front side toward the inside of the sleeve 200, and passes through the inlet hole 314 in the circumferential surface. The inlet hole 314 is connected to the internal space 312. Thus, the brake oil forcibly introduced from the outside through the inlet hole 314 is discharged to the front side of the piston 310 through the inner space 312. As a result, the brake oil flows into the sleeve 200 while pushing the inlet ball 324.

Then, the piston 310 is forcibly drawn into the sleeve 200 by the eccentric cam 10 of the motor (not shown). At this time, the piston 310 is provided with an inlet sealing member 316 on the circumferential surface to prevent the reverse flow of the brake oil to the gap between the piston 310 and the sleeve 200 when the piston 310 is drawn into the sleeve 200. The inlet sealing member 316 may be variously applied, such as an O-ring.

As the piston 310 is forcibly drawn into the sleeve 200, the brake oil temporarily stored in the sleeve 200 is discharged through the communication hole 210.

In addition, when the eccentric cam 10 is to remove the force pushing the piston 310, the piston 310 is preferably withdrawn from the inside of the sleeve 200 to return to the initial position. Thus, the sleeve 200 has a return elastic member 318 therein. That is, when the piston 310 is forcibly advanced, the return elastic member 318 is in a compressed state. On the contrary, when the external force pushing the piston 310 is removed, the return elastic member 318 is elastically restored and reverses the piston 310. The return elastic member 318 is preferably a coil spring.

The inlet valve 320 is provided at the open front side of the piston 310 and serves to open and close the front side of the piston 310 according to whether the brake oil is forced into the piston 310.

More specifically, the inlet valve 320 opens one side to be connected to the open front side of the piston 310 and the valve housing 322 through the opening hole 323 to the other side to guide the discharge of the introduced brake oil, It is provided inside the valve housing 322 and is provided inside the ball-shaped inlet ball 324 for opening the front side of the piston 310 by the pushing force of the brake oil, and the valve housing 322 is brake The inlet elastic member 326 allows the inlet ball 324 to seal the front side of the piston 310 by elastically supporting the inlet ball 324 when the pushing force of oil is removed.

Here, the inlet elastic member 326 is preferably a coil spring.

Thus, when the brake oil is forced into the piston 310, the inlet ball 324 is spaced apart from the piston 310 by the pushing force of the brake oil, the inlet elastic member 326 is in a compressed state. As a result, the brake oil is supplied into the sleeve 200 through the gap between the inlet ball 324 and the valve housing 322 and the opening hole 323.

On the contrary, when the brake oil is not supplied into the piston 310, the inlet elastic member 326 is elastically restored and interlocked thereto, and the inlet ball 324 moves backward to block the open side of the piston 310.

The orifice channel 400 is connected to the communication hole 210 of the sleeve 200, and the damper part 500 is provided at the orifice channel 400.

The damper portion 500 may be directly connected to the sleeve 200, but as the damper body 510, which will be described later, of the sleeve 200 and the damper portion 500 is disposed too close, the sleeve 200 and the damper The unit 500 is preferably connected to the orifice channel 400 so as to be spaced by a set distance. Accordingly, the sleeve 200 and the damper unit 500 are spaced apart by a predetermined distance. For this reason, whenever the piston 310 is drawn into the sleeve 200, the brake oil inside the sleeve 200 causes pulsation and is discharged to the communication hole 210, but the orifice channel 400 has a set length. It primarily reduces the pulsation of the brake oil flowing inside.

Thus, the orifice channel 400 has a length set to minimize pulsation of the brake oil discharged from the communication hole 210.

In this case, the orifice channel 400 may be applied in various shapes, and may be fixed to the sleeve 200 by inserting one side into the communication hole 210. In addition, the orifice channel 400 may be made of various materials, and is not limited to length.

On the other hand, the damper 500 is connected to the end of the orifice channel 400 is supplied with the brake oil, and serves to guide the discharge in a state in which the pulsation phenomenon of the supplied brake oil is reduced once more.

In particular, the damper part 500 is not directly connected to the sleeve 200, but the damper part 500 and the orifice channel 400 are modularized and connected to the sleeve 200 in which the piston part 300 is assembled. , The components for the assembly of the piston pump 100 is reduced compared to the existing, the assembly cost is reduced, the assembly time is reduced.

The damper unit 500 includes a damper body 510, a damper piston 520, and a damper elastic member 530.

The damper body 510 forms an outer shape of the damper part 500 and is connected to the orifice channel 400 to introduce the brake oil discharged through the communication hole 210 into the inside.

At this time, the inner diameter d1 of the orifice channel 400 is smaller than the inner diameter d3 of the damper body 510. (d1 < d3) That is, the orifice channel 400 is formed relatively thin. Thus, as the brake oil is supplied through the relatively thin orifice channel 400 and then supplied into the relatively thick damper body 510, the internal pressure of the brake oil is lowered, thereby pulsating phenomenon is primarily reduced. As a result, the orifice channel 400 serves as an orifice.

In addition, the inner diameter d1 of the orifice channel 400 is preferably smaller than the inner diameter d2 of the sleeve 200. (d1 <d2) Thus, the brake oil may be formed inside the sleeve 200 which is a relatively large space. After being temporarily stored and discharged to the orifice channel 400, which is a relatively narrow space, the speed and pressure increase. This is to have a force for pushing the damper piston 520 of the damper unit 500.

In addition, the damper body 510 passes through the inflow guide hole 512 on the circumferential surface to connect one side of the orifice channel 400. In addition, the damper body 510 passes through the discharge hole 514 on the circumferential surface to discharge the introduced brake oil. In this case, the orifice channel 400 may be connected to the inlet guide hole 512 of the damper body 510 in various ways. In addition, the inflow guide hole 512 and the discharge hole 514 is preferably formed on the other circumferential surface of the damper body 510, and is not limited to the diameter or number. Of course, the damper body 510 is applicable to a variety of shapes and materials.

In addition, the damper piston 520 is provided inside the damper body 510 and is provided to be movable along the axial direction of the damper body 510.

In particular, the damper piston 520 is forcibly moved along the axial direction of the damper body 510 by the pushing force of the brake oil flowing through the inlet guide hole 512 of the damper body 510. At this time, as the damper piston 520 ascends to the upper side of the discharge hole 514, the inflow guide hole 512 and the discharge hole 514 can be connected to allow the flow of the brake oil. Thus, the inflow guide hole 512 and the inside of the damper body 510 and the discharge hole 514 are connected, whereby the brake oil is discharged after the inflow into the damper body 510. At this time, since the brake oil is temporarily stored in the damper body 510 wider than the orifice channel 400, the brake oil is discharged through the discharge hole 514, thereby reducing the pulsation phenomenon.

On the other hand, in the initial state, the damper piston 520 is preferably provided to block the inlet guide hole 512 of the damper body 510. This is because when the piston 310 is retracted from the inside of the sleeve 200, sufficient internal pressure is formed in the sleeve 200 and the orifice channel 400 when the brake oil flows into the sleeve 200. This is to set the pressure of the brake oil required for the braking force.

Thus, the damper piston 520 forcibly blocks the inflow guide hole 512 in the initial state. That is, the damper elastic member 530 is provided inside the damper body 510 to return the damper piston 520 to the initial position or maintain the initial state when the pushing force of the brake oil is removed. In other words, one side of the damper elastic member 530 is supported inside the damper body 510, and the other side elastically supports the damper piston 520. Here, the damper elastic member 530 is preferably a coil spring.

Thus, when the brake oil is forced into the damper body 510, the damper piston 520 is pushed inside the damper body 510 by the pushing force of the brake oil, and the damper elastic member 530 is in a compressed state. Becomes As a result, the brake oil is supplied into the damper body 510. At this time, the damper piston 520 is raised or pushed inside the damper body 510 until the inlet guide hole 512 and the discharge hole 514 are exposed to the same inner space of the damper body 510.

On the contrary, when the brake oil is not supplied into the damper body 510, the damper elastic member 530 is elastically restored and interlocked with the damper piston 520, and the damper piston 520 moves backward and opens the inflow guide hole of the damper body 510. Block 512.

In addition, the damper piston 520 is preferably provided with a damper sealing member 522 on the circumferential surface of the damper piston 520 and the damper body 510 to prevent the reverse flow of the brake oil. The damper sealing member 522 may be variously applied, such as an O-ring.

In addition, the damper body 510 is preferably provided with a damper cap 540 to open and close the inside. Accordingly, the damper body 510 may be opened, and thus the maintenance of the damper piston 520 and the damper elastic member 530 may be performed. Of course, the damper cap 540 is firmly fixed to the damper body 510 in various ways, and can be modified in various shapes.

Looking at the operation of the piston pump 100 of the vehicle braking device according to an embodiment of the present invention configured as described above are as follows.

As shown in FIG. 2, in the state where the eccentric cam 10 does not push the piston 310, the brake oil 2 is inside the inlet valve 320 through the inlet hole 314 and the inner space 312 of the piston 310. Is supplied. The inlet ball 324 of the inlet valve 320 is advanced by the pressure supplied from the brake oil 2 and opens one open side of the piston 310 into the sleeve 200. Thus, the brake oil 2 is supplied into the sleeve 200 and into the orifice channel 400.

At this time, the damper elastic member 530 is applied to the damper body 510 to the damper body 510 so that the damper piston 520 of the damper part 500 blocks the opening hole 323 of the damper body 510. Elastic support.

The reference numerals not described are replaced with those described above.

3, when the brake oil 2 is released to the inlet hole 314 of the piston 310, although not shown, the inlet hole 314 is controlled to be blocked. For this reason, the inlet ball 324 blocks the open side of the piston 310 by the elastic restoration of the inlet elastic member 326.

When the eccentric cam 10 pushes the piston 310, the piston 310 moves forward into the sleeve 200 and compresses the return elastic member 318. As the piston 310 moves forward, the brake oil 2 inside the sleeve 200 and the orifice channel 400 pushes up the damper piston 520 of the damper body 510 through the orifice channel 400. . Thereafter, the brake oil 2 is discharged through the discharge hole 514 of the damper body 510. At this time, the damper elastic member 530 is in a compressed state.

As a result, the orifice channel 400 has a set length so that the distance between the sleeve 200 and the damper body 510 is spaced, so that the brake oil 2 inside the sleeve 200 is pushed by the piston 310. During the movement into the damper body 510, the pulsation phenomenon is primarily reduced.

Then, the brake oil 2 is supplied into the relatively wide damper body 510 and is discharged in a state in which pulsation is reduced secondarily.

The reference numerals not described are replaced with those described above.

Although not shown, when the eccentric cap releases the force pushing the piston 310, the piston 310 is moved back to the initial position due to the elastic recovery of the return elastic member 318, and at the same time, damper piston 520 ) Is moved to the initial position by the elastic recovery of the damper elastic member 530 to block the inlet guide hole 512 of the damper body 510.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. I will understand. Therefore, the true technical protection scope of the present invention will be defined by the claims below.

10: eccentric cam 100: piston pump
200: sleeve 210: communication hole
300: piston 310: piston
312: interior space 314: inlet hole
316: inlet sealing member 318: return elastic member
320: inlet valve 322: valve housing
323: opening hole 324: inlet ball
326: inlet elastic member 400: orifice channel
500: damper portion 510: damper body
512: inlet guide hole 514: outlet hole
520: damper piston 522: damper sealing member
530: damper elastic member 540: damper cap

Claims (5)

Opening one side, the sleeve through the communication hole in the circumferential surface;
A piston part which introduces brake oil into the sleeve and is introduced into the sleeve and forcibly discharges the brake oil into the communication hole;
An orifice channel having a length set to reduce pulsation of the brake oil discharged from the communication hole and connected to the communication hole; And
And a damper portion connected to the orifice channel for reducing pulsation and inducing discharge in a state of reducing pulsation of the brake oil.
The method of claim 1, wherein the damper portion,
A damper body connected to the orifice channel and into which the brake oil discharged through the communication hole flows and forms a discharge hole in a circumferential surface thereof;
A damper piston provided inside the damper body to induce the discharge of the brake oil by rising to an upper side of the discharge hole by a pushing force of the brake oil introduced; And
And a damper elastic member provided in the damper body to return the damper piston to an initial position when the pushing force of the brake oil is removed.
The method of claim 2,
The damper body is a piston pump of the vehicle braking device, characterized in that it has a damper cap to open and close the inside.
3. The method according to claim 1 or 2,
The inner diameter of the orifice channel is smaller than the inner diameter of the sleeve, the piston pump of the vehicle braking device.
The method of claim 2,
The inner diameter of the orifice channel is smaller than the inner diameter of the damper body piston pump of the vehicle braking device.
KR1020110116678A 2011-11-09 2011-11-09 Piston-pump of brake apparatus for vehicle KR20130051376A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020110116678A KR20130051376A (en) 2011-11-09 2011-11-09 Piston-pump of brake apparatus for vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020110116678A KR20130051376A (en) 2011-11-09 2011-11-09 Piston-pump of brake apparatus for vehicle

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Publication Number Publication Date
KR20130051376A true KR20130051376A (en) 2013-05-20

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KR1020110116678A KR20130051376A (en) 2011-11-09 2011-11-09 Piston-pump of brake apparatus for vehicle

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101404716B1 (en) * 2013-05-22 2014-06-09 (주)대우건설 Surging removing device for constructing shotcrete
KR20170040655A (en) 2015-10-05 2017-04-13 현대모비스 주식회사 Pump for brake of vehicle
US9969372B2 (en) 2015-10-05 2018-05-15 Mando Corporation Hydraulic brake system
JP2021091370A (en) * 2019-12-12 2021-06-17 ロベルト・ボッシュ・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツングＲｏｂｅｒｔ Ｂｏｓｃｈ Ｇｍｂｈ Pump device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101404716B1 (en) * 2013-05-22 2014-06-09 (주)대우건설 Surging removing device for constructing shotcrete
KR20170040655A (en) 2015-10-05 2017-04-13 현대모비스 주식회사 Pump for brake of vehicle
US9969372B2 (en) 2015-10-05 2018-05-15 Mando Corporation Hydraulic brake system
JP2021091370A (en) * 2019-12-12 2021-06-17 ロベルト・ボッシュ・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツングＲｏｂｅｒｔ Ｂｏｓｃｈ Ｇｍｂｈ Pump device

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