• 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:
    1. TECHNICAL FIELD OF THE INVENTION Plate Cam Piston Pumps 2. The technical gist of the invention The present invention is simple in structure and low in manufacturing cost, even if the pump is made large to increase the discharge amount, the price is low. 3. Summary of Solution to Invention The present invention is a base having a built-in hydraulic oil passage; It is mounted on the periphery of the base at a predetermined interval, the inlet of the hydraulic fluid is formed on one side, the hole is provided with a discharge port for passing the hydraulic oil introduced through the suction port to the lower side, the lower end of the hole and the hydraulic oil passage A plurality of cylinders in communication; A camshaft mounted to be upright at the center of the base and driven by external power; And it provides a plate cam-type piston pump including a means for providing the shank power to the piston by receiving the rotational force of the camshaft. 4. Important uses of the invention The present invention is to simplify the structure of the piston pump for supplying a high-pressure hydraulic fluid to the hydraulic cylinder or hydraulic machine to reduce the price and increase the efficiency of the force.
    公开号:KR19980087792A
    申请号:KR1019980038641
    申请日:1998-09-18
    公开日:1998-12-05
    发明作者:이창재
    申请人:이창재；
    IPC主号:
    专利说明:

    Plate Cam Piston Pumps
    The present invention relates to a piston pump for supplying hydraulic oil to a hydraulic cylinder or a hydraulic motor, and in particular, a plurality of pistons are linearly reciprocated by a single plate cam whose thickness of the periphery is continuously changed. The price difference according to the present invention relates to a plate cam piston pump that can be used practically.
    In general, a piston pump is a pump for reciprocating a piston inserted into a cylinder to push hydraulic oil from the suction side to the discharge portion, and is used to supply high pressure hydraulic oil to a hydraulic cylinder or a hydraulic machine.
    Then, the conventional axial and radial piston pumps will be briefly described with reference to FIGS. 1 and 2.
    In the conventional axial piston pump shown in Figs. 1A and 1B, the cylinder hole of the cylinder 4 moves away from the valve plate 3 while the piston 2 rotates from 0 ° to 180 °. By generating a negative pressure inside (4a), hydraulic oil is sucked from the inlet 3a of the valve plate 3 to the cylinder hole 4a side. Subsequently, while the drive shaft 1 rotates from 180 ° to 360 °, the piston 2 approaches the valve plate 3 and pressurizes the hydraulic oil sucked into the cylinder hole 4a to form the valve plate 3. To the exit 3b.
    At this time, the drive shaft 1 is mounted so that its center axis has an angle θ of about 25 ° to 30 ° with the center axis of the cylinder 4, and when the drive shaft 1 is rotated, the piston 2 The distance between the valve plate 3 and the insertion depth of the piston 2 in the cylinder 4 changes continuously.
    On the other hand, in the conventional radial piston pump shown in Fig. 2, the piston 5a, 5b, 5c moves forward or backward by the eccentric drive of the eccentric cam 6, respectively, to perform the suction start stroke, the suction end stroke and the discharge stroke. Will be performed. At this time, in the suction start stroke, the piston 5a located at the bottom dead center is moved toward the eccentric cam 6 to open the first check valve 7a in communication with the suction pipe 7, thereby operating oil is sucked into the suction pipe 7. To the discharge tube 8 side from the side. In the suction end stroke, the piston 5b is advanced toward the eccentric cam 6 to the top dead center, thereby closing the second check valve 8b communicating with the first check valve 7a and the discharge pipe 8. To prevent the flow of hydraulic fluid. Further, in the discharge stroke, the hydraulic fluid flows to the discharge pipe 8 by opening the second check valve 8a while the piston 5c is moved backward and the first check valve 7a is closed.
    However, the conventional piston pump as described above has a problem that the structure is very complicated and the manufacturing cost is high, and when the discharge amount of the hydraulic oil is increased, the price difference is very large depending on the quantity.
    Therefore, the present invention has been made in order to solve the above problems, the structure is simple and the manufacturing cost is low, the price difference according to the discharge amount of the working oil is small, the discharge period is long, the slope of the cam is gentle and the loss of force It is an object of the present invention to provide a plate cam type piston pump which can reduce the frictional heat and increase the efficiency of the force.
    1A and 1B are schematic configuration diagrams of a conventional axial piston pump.
    Figure 2 is a schematic configuration diagram of a conventional radial piston pump.
    Figure 3 is a schematic diagram showing an embodiment of a plate cam type piston pump according to the present invention.
    Figure 4 is a plan view schematically showing a plate cam type piston pump according to the present invention.
    5A and 5B are a front view and a plan view showing a cylinder of the present invention.
    6A, 6B and 6C are front, side and plan views of the piston of the present invention.
    7 is a plan view showing a plate cam of the present invention.
    Figure 8 is a schematic diagram showing the shape of the bent portion in the plate cam of the present invention.
    * Explanation of symbols for the main parts of the drawings
    10 base 11 hydraulic oil passage
    12: bolt fastening block 20: cylinder
    21: hole 22: suction port
    23 discharge port 30 check valve
    40: piston head support 50: piston
    51: piston head 60: tapered bearing
    70: camshaft 81: the disc portion of the plate cam
    82: bend of the fan cam
    The present invention for achieving the above object is a base having a built-in hydraulic oil passage; It is mounted on the periphery of the base at a predetermined interval, the inlet of the hydraulic fluid is formed on one side, the hole is provided with a discharge port for passing the hydraulic oil introduced through the suction port to the lower side, the lower end of the hole and the hydraulic oil passage A plurality of cylinders in communication; A piston mounted on an upper portion of the cylinder to move along the hole of the cylinder; A check valve mounted to a hole of the cylinder to open and close the discharge port in association with a shangdong of the piston; A camshaft mounted to be upright at the center of the base and driven by external power; And a means for receiving the rotational force of the camshaft to provide shank power to the piston.
    Hereinafter, with reference to the accompanying Figures 3 to 8 will be described in detail a preferred embodiment of the present invention.
    The plate cam-type piston pump of the present invention has a simple structure and can be manufactured at low cost. As shown in FIGS. 3 and 4, a hydraulic oil passage 11 communicating with a hydraulic circuit is built in the outer circumferential surface thereof. A base 10 having a plurality of bolting blocks 12 formed therein is provided at the bottom thereof. The base 10 is fixed to the bottom surface of the pump housing (not shown) by fastening the bolt to the bolt fastening block 12.
    In the radial direction of the base 10, a plurality of cylinders (6 in the illustrated example) are mounted at regular intervals, and the lower predetermined portion of the cylinder 20 is embedded in the base 10. As shown in FIG. 5, a stepped hole 21 is formed inside the cylinder 20, and a suction port 22 for working oil is formed at a predetermined upper side of the stepped part of the hole 21. The stepped portion 21 becomes the discharge port 23 of the hydraulic oil introduced through the suction port 22. At this time, the discharge port 23 is opened and closed by the check valve 30 built in the lower side of the step portion of the hole 21. The lower end of the hole 21 communicates with the hydraulic oil passage 11 built in the base 10 so that the hydraulic oil passing through the discharge port 23 can be supplied to the hydraulic motor or the hydraulic cylinder.
    In addition, a piston head support 40 having an arc shape of 120 ° is integrally formed on one side of the upper surface of the cylinder 20, and a pin is inserted into and fixed to an upper end of the piston head support 40.
    On the other hand, the upper surface of the cylinder 20 is provided with a piston 50 to move along the hole 21 of the cylinder 20. Here, the piston 50 is on one side It has a piston head 51 formed with a magnetic opening, the other side of the piston head 51 is formed with a key groove in the vertical direction is inserted into one end of the pin is fixed to the piston head support 40 (Fig. 6) Reference). When the piston 50 is moved downward, the check valve 30 is moved downward by the pressure of the hydraulic oil pressurized by the piston 50 to open the discharge port 23, thereby opening the suction port 22. The hydraulic oil introduced into the hole 21 of the cylinder 20 through the hydraulic oil passage 11 is communicated with the lower portion of the cylinder 20.
    In addition, a tapered bearing 60 is built in the center of the base 10, and the cam shaft 70 is fitted in the tapered bearing 60 to be erected upwardly of the base 10. Here, the upper end of the camshaft 70 is supported by a tapered bearing assembled to the cover of the pump housing, through which the camshaft 70 is driven by receiving external power.
    A portion protruding above the outer circumferential surface of the cam shaft 70 is formed, and a screw thread is formed on the lower circumferential surface of the lower portion of the cam shaft 70. Here, the disc portion 81 of the plate cam having a predetermined thickness penetrates and is mounted below the protrusion of the cam shaft 70, and the plate cam is rotated by the cam shaft 70 by fastening a nut to the thread of the cam shaft 70. It is fixed so that it can be rotated together in a horizontal direction.
    On the other hand, the upper and lower periphery of the disc portion 81 is formed with a bent portion 82 for changing its thickness. Here, the thickness change of the periphery of the plate cam by the bent portion 82, as shown in Figure 7 and 8, in the first 0 ° to 120 ° section of the disc portion 81 is the bent portion 82 is the upper surface of the disc Although formed in the above section is gradually thickened to the upper side, in the 120 ° ~ 360 ° section of the disc portion 81, the bent portion 82 is formed on the lower surface of the disc but gradually thickened downward in the above section. In other words, the ratio between the total extension length of the bent portion 82 formed above the disc portion 81 and the total extension length of the bent portion 82 formed below the disc portion 81 is about 1: 2. Such a plate cam continuously rotates by the camshaft 70 while its bent portion 82 is in contact with the inside of the opening of the piston head 51 and moves the piston 50 in accordance with its thickness change. At this time, the pin of the piston head support 40 inserted into the key groove of the piston head 51 prevents the piston head 51 from being rotated by the friction force with the rotating plate cam.
    Accordingly, when the 0 ° to 120 ° point of the plate cam passes through the opening of the piston head 51, the piston 50 is moved upward, and the hydraulic oil flows into the cylinder hole 21 through the suction port 22. Allow it to flow into. When the 120 ° to 360 ° point of the plate cam passes to the opening side of the piston head 51, the piston 50 moves downward to pressurize the hydraulic oil already introduced into the cylinder hole 21. As a result, the check valve 30 is moved downward to open the discharge port 23 so as to discharge the hydraulic oil. At this time, the hydraulic oil is passed through the discharge port 23 to the hydraulic oil passage 11, and then to the external hydraulic cylinder and the hydraulic motor.
    As described above, the discharging period of the hydraulic oil according to the present invention is longer than the discharging period during the fan cam rotation while the discharging period of the axial type is during the cam rotation ½, and thus is formed below the plate cam. Since the inclination of the bend 82 is gentle, the frictional force due to rotation while contacting the piston head 51 can be minimized, and the efficiency of the force can be increased.
    The present invention described above is not limited to the above-described embodiments and drawings, and various substitutions, modifications, and changes can be made without departing from the technical spirit of the present invention. It will be apparent to those who have
    The present invention, which is configured and functions as described above, has a simple structure and is low in manufacturing cost, and can reduce the price difference of equipment according to the discharge amount of working oil, and the discharge period is longer than that of the pump according to the prior art. Since the slope of is gentle, the loss of force is small, and the frictional heat is also small, thereby improving the efficiency of the force.
    权利要求:
    Claims (4)
    [1" claim-type="Currently amended] A base having a built-in hydraulic oil passage;
    It is mounted on the periphery of the base at a predetermined interval, the inlet of the hydraulic fluid is formed on one side, the hole is provided with a discharge port for passing the hydraulic oil introduced through the suction port to the lower side, the lower end of the hole and the hydraulic oil passage A plurality of cylinders in communication;
    A piston mounted on an upper portion of the cylinder to move along the hole of the cylinder;
    A check valve mounted to a hole of the cylinder to open and close the discharge port in association with a shangdong of the piston;
    A camshaft mounted to be upright at the center of the base and driven by external power; And
    Means for providing shank power to the piston by receiving the rotational force of the camshaft
    Plate cam type piston pump comprising a.
    [2" claim-type="Currently amended] The method of claim 1,
    Plate cam type piston pump is integrally formed on the upper surface of the cylinder, and further comprising a piston head support is mounted so as to protrude a pin for guiding the movement of the piston.
    [3" claim-type="Currently amended] The method according to claim 1 or 2,
    The piston,
    On one side, a groove in which the protrusion of the pin mounted on the piston head support is inserted is formed long in the vertical direction, and on the other side, a plate cam-type piston pump having a piston head formed with an opening to allow the peripheral portion of the shank power providing means to be inscribed. .
    [4" claim-type="Currently amended] The method of claim 3, wherein
    The Shanghai power supply means,
    A disc portion fixed to the camshaft and receiving a rotational force thereof;
    And a plate cam type piston pump formed on the periphery of the disc portion and inscribed with an opening of the piston head, the bent portion continuously changing the periphery thickness of the disc portion so that the piston in contact therewith can move.
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    同族专利:
    公开号 | 公开日
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    1998-09-18|Application filed by 이창재
    1998-09-18|Priority to KR1019980038641A
    1998-12-05|Publication of KR19980087792A
    优先权:
    申请号 | 申请日 | 专利标题
    KR1019980038641A|KR19980087792A|1998-09-18|1998-09-18|Plate Cam Piston Pumps|
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