• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    PURPOSE: A pump apparatus for an anti-lock brake system is provided to feed oil actively in returning a piston and improve the reliability on operation of the system by temporarily storing a little amount of oil in the inclined surface between an inner wall of a pump block and an outer periphery of the piston in mounting a center valve and a check valve to the piston. CONSTITUTION: A pump apparatus for an anti-lock brake system is composed of a pump block(20) having a suction port(22) and a discharge port(24); a motor(30) eccentrically rotated and installed in the center of the pump block; and a piston(40) interlocking with the motor, moving back and forth to discharge oil from the suction port to the discharge port through a suction passage(42), and mounting a center valve(50) opening and closing the suction passage. The center valve includes a guide shaft(52) inserted to the suction passage, and a body(54) opening the suction passage according to hydraulic pressure and closing the suction passage by a spring(48a) mounted between a retainer(44) surrounding the end of the piston and the body.
    公开号:KR20040009405A
    申请号:KR1020020043343
    申请日:2002-07-23
    公开日:2004-01-31
    发明作者:박성준
    申请人:현대모비스 주식회사；
    IPC主号:
    专利说明:

    Pump device of anti-lock brake system {PUMP DEVICE OF ABS SYSTEM}
    [13] The present invention relates to a pump device of an anti-lock brake system, and more particularly, to a pump device of an anti-lock brake system in which a smooth pumping operation is performed by changing the structure of a piston of the pump device.
    [14] In general, the anti-lock brake system is for braking a vehicle in motion, and when the brake pedal is activated, the hydraulic oil passes through various valves, accumulators, and pump devices to generate braking force. The dual pump device is a device for inducing the flow of oil.
    [15] Referring to FIG. 1, in which a conventional pump apparatus 100 is schematically illustrated, the piston (by the retraction movement of the piston 130 installed to interlock with a motor 120 installed in an eccentric rotation to the pump block 110) 130, when the suction passage 132 formed therein is selectively in communication with the suction port 112 formed in the pump block 110, oil flowing from an accumulator (not shown) flows into the suction passage through the suction port 112. After entering the 132, it was discharged to the discharge port 114 formed in the pump block 110.
    [16] Here, the sphere 138 is in close contact with the retainer 134 and the spring 136 mounted on the distal end of the piston 130 to the opening of the suction shaft 132 formed in the piston 130 to be in close contact with the sphere 138. The suction channel 132 was opened and closed by the elastic force of the spring 136 acting on the sphere 138 and the oil pressure passing through the suction channel 132. In addition, a plurality of grooves 139 are formed in the piston 130 to remove oil leaked into the gap between the outer circumferential surface of the piston 130 and the inner wall gap of the pump block 110.
    [17] However, the piston 130 configured as described above has a problem in the reliability of the system operation by achieving the flow of oil depending only on the suction flow path 132 which is in instant communication with the suction port 112 during the return stroke. .
    [18] The present invention has been made in view of the above problems, the inclined surface is formed so that a predetermined amount of oil is temporarily stored between the inner wall of the pump block and the outer peripheral surface of the piston while the center valve and the check valve is mounted on the piston, It is an object of the present invention to provide a pump device of an anti-lock brake system in which oil can be smoothly supplied even at the return stroke of the piston and the reliability of the operation of the system is improved.
    [1] 1 is a cross-sectional view schematically showing a pump device of a conventional anti-lock brake system,
    [2] Figure 2 is a cross-sectional view schematically showing a pump device according to an embodiment of the present invention.
    [3] <Description of Symbols for Main Parts of Drawings>
    [4] 10 ... pump unit 20 ... pump block,
    [5] 30 ... motor 40 ... piston,
    [6] 41 ... sitting groove 42 ... suction channel,
    [7] 44 retainer 46 pump room,
    [8] 48a, 48b ... Spring 49 ...
    [9] 50 center valve 52 guide shaft
    [10] 54 body ...
    [11] 64 ... spring 66 ... valve cap,
    [12] 68.Valve seat 70 ... Check valve.
    [19] The present invention for achieving the above object, the suction port and the discharge port is installed in conjunction with the pump block formed in place, the motor mounted so as to be eccentrically rotated in the pump block of the suction port through the suction flow path formed therein In the pump device of the anti-lock brake system comprising a piston for moving back and forth to discharge the oil to the discharge port, the piston is provided with a guide shaft which is inserted into the open end of the suction flow path, the oil flowing into the suction flow path A center valve is provided, which is made of a body mounted to close the suction flow path by a spring force mounted between the retainer surrounding one end of the piston while opening the suction flow path by pressure.
    [20] The piston is provided with a check valve having a tip portion which is selectively spaced apart from the inner wall of the pump block according to the direction of movement of the piston in the seating groove formed in place of the piston.
    [21] The piston is formed with an inclined surface to form a space for temporarily storing some of the oil flowing from the suction port to the suction flow path between the pump block and the piston.
    [22] Hereinafter, a pump apparatus of an anti-lock brake system according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.
    [23] 2 is a cross-sectional view schematically showing a pump device according to an embodiment of the present invention, as shown in Figure 2, the pump device 10 according to the present invention is a suction port 22 and the discharge port 24 The pump block 20 formed in place, the motor 30 mounted in the center of the pump block 20 to be eccentrically rotated, and the suction flow path 42 formed therein while being installed to interlock with the motor 30 The piston 40 is provided to move forward and backward to discharge the oil of the suction port 22 to the discharge port 24, the center valve 50 for regulating the opening and closing of the suction flow path (42).
    [24] The center valve 50 has one end of the piston 40 while opening the suction channel 42 by the guide shaft 52 inserted into the suction channel 42 and the oil pressure introduced into the suction channel 42. It consists of the body 54 mounted so that the suction flow path 42 may be closed by the spring 48a force mounted between the retainer 44 which surrounds a part.
    [25] The center valve 50 regulates that the oil flowing into the suction passage 42 which is in instant communication with the suction port 22 by the forward and backward movement of the piston 40 flows through the opening of the suction passage 42. In the push stroke in which the piston 40 is performed by the rotational force of the motor 30, the center valve 50 closes the suction channel 42 to discharge oil from the suction channel 42. By pressing the oil temporarily stored in the pump chamber 46 by pressing the sphere 60, the oil is discharged to the discharge port 24.
    [26] In addition, the sphere 60 is returned to its original state by the force of the spring 64, the discharge port 24 is closed by the valve cap 66, the retainer 44 and the valve mounted on the front end of the piston 40 In the return stroke of the piston 40 performed by the spring 48b force provided between the seats 68, the oil flowing into the suction flow path 42 from the suction port 22 is the center valve ( While pressing the body 54 of the 50 to pass through the open suction flow path 42 is temporarily stored in the pump chamber 46. Here, the center valve 50 is tightly fixed to close the suction passage 42 by the force of the spring 48a overcoming the oil pressure.
    [27] On the other hand, the piston 40 is inclined surface 49 between the piston 40 and the pump block 20 to form a space for temporarily storing some of the oil flowing into the suction flow path 42 from the suction port 22 ) Is formed.
    [28] In addition, a check valve 70 is mounted in a seating groove 41 formed at an appropriate position of the piston 40, and the tip of the check valve 70 leaks oil from the pump chamber 46 when the piston 40 is pushed. The pump block is in close contact with the inner wall of the pump block 20 so that oil temporarily stored between the piston 40 and the pump block 20 flows into the pump chamber 46 during the return stroke of the piston 40. It has flexibility to be spaced apart from the inner wall of 20.
    [29] In accordance with the present invention, while the center valve and the check valve is mounted on the piston, an inclined surface is disposed on the piston to form a space for temporarily storing oil between the piston and the pump block, thereby eliminating the process of forming grooves that have been processed in the conventional piston. In addition, the oil is smoothly supplied during the return stroke of the piston, thereby improving the reliability of system operation.
    权利要求:
    Claims (3)
    [1" claim-type="Currently amended] Piston which is retracted so that the oil of the suction port is discharged to the discharge port through the suction flow path formed therein while being installed in conjunction with the pump block formed in the suction port and the discharge port, the motor mounted eccentrically rotated on the pump block In the pump device of the anti-lock brake system, comprising:
    The piston has a suction flow path by a spring force mounted between a guide shaft inserted into the open end of the suction flow path and a retainer surrounding one end of the piston while opening the suction flow path by the oil pressure introduced into the suction flow path. The pump device of the anti-lock brake system, characterized in that the center valve is installed consisting of a body mounted to close the.
    [2" claim-type="Currently amended] The method of claim 1,
    And a check valve having a front end portion which is selectively spaced apart from the inner wall of the pump block according to the direction of movement of the piston, in the piston in a seating groove formed in place of the piston.
    [3" claim-type="Currently amended] The method of claim 2,
    The pump device of the anti-lock brake system, characterized in that the inclined surface is formed in the piston to form a space for temporarily storing some of the oil flowing from the suction port to the suction flow path between the pump block and the piston.
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    同族专利:
    公开号 | 公开日
    KR100496327B1|2005-06-20|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2002-07-23|Application filed by 현대모비스 주식회사
    2002-07-23|Priority to KR10-2002-0043343A
    2004-01-31|Publication of KR20040009405A
    2005-06-20|Application granted
    2005-06-20|Publication of KR100496327B1
    优先权:
    申请号 | 申请日 | 专利标题
    KR10-2002-0043343A|KR100496327B1|2002-07-23|2002-07-23|Pump device of abs system|
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