Piston shoe of axial plunger pump

Abstract

The utility model provides a sliding shoe of an axial plunger pump. The piston shoe of the axial plunger pump comprises a swash plate and a piston rod, a plurality of mounting holes are formed in the top of the swash plate, a fixing bolt is mounted in each mounting hole, an upper sliding shoe is fixedly connected to the bottom end of each fixing bolt, and a second fixing ring is fixedly connected to the position, located at the bottom end, of the outer surface of each upper sliding shoe; a first fixing ring is installed at the bottom of the second fixing ring through a bolt, a lower sliding shoe is fixedly connected to the inner surface of the first fixing ring, clamping grooves are formed in the adjacent ends of the lower sliding shoe and the upper sliding shoe correspondingly, sealing rings are arranged in the clamping grooves, and a sealing ring is installed at the bottom end of the lower sliding shoe; and a lubricating assembly is mounted at the top of the swash plate. According to the sliding shoe of the axial plunger pump, the whole sliding shoe is divided into the upper sliding shoe body and the lower sliding shoe body through the design, on the premise that sealing performance and normal work are not affected, connection between the plunger upper ball head and the sliding shoe body is facilitated, and the disassembly and assembly difficulty is lowered.

Description

Technical Field

[0001] The utility model relates to the technical field of plunger pump sliding shoes, in particular to an axial plunger pump sliding shoe. Background Art

[0002] The plunger pump is an important device in the hydraulic system. It relies on the reciprocating motion of the plunger in the cylinder to change the volume of the sealed working chamber to achieve oil suction and oil pressure. The plunger pump has the advantages of high rated pressure, compact structure, high efficiency and convenient flow adjustment.

[0003] The structure of the plunger pump includes a cylinder body, a plunger, a slipper, a swash plate and an oil distribution plate. The plunger contacts the swash plate through the slipper. When the drive shaft drives the cylinder body to rotate, the swash plate pulls the plunger out of or pushes it back into the cylinder body to complete the oil suction and discharge process. The variable mechanism is used to change the inclination angle of the swash plate, thereby adjusting the displacement of the pump.

[0004] The slipper of the plunger pump is generally an integrally formed hemispherical structure, and the slipper is sleeved on the outer surface of the plunger ball head. During the installation process, the plunger ball head is not convenient to connect, which increases the difficulty of disassembling and assembling the slipper and the plunger ball head.

[0005] Therefore, it is necessary to provide an axial piston pump slipper to solve the above technical problems. Utility Model Content

[0006] The utility model provides an axial piston pump sliding shoe, which solves the problem that the sliding shoe is an integrated sliding shoe sleeved on the outer surface of the plunger ball head, which is inconvenient to operate during the connection process with the plunger ball head and increases the difficulty of disassembly and assembly.

[0007] In order to solve the above technical problems, the utility model provides an axial piston pump slipper including: a swash plate;

[0008] a plurality of mounting holes, wherein the plurality of mounting holes are opened at the top of the swash plate, a fixing bolt is installed inside each mounting hole, the bottom end of each fixing bolt is fixedly connected to an upper sliding shoe, the outer surface of the upper sliding shoe is fixedly connected to a second fixing ring at a position at the bottom end, the bottom of the second fixing ring is fixedly connected to a first fixing ring by a bolt, the inner surface of the first fixing ring is fixedly connected to a lower sliding shoe, a slot is opened at one end adjacent to the lower sliding shoe, a sealing ring is provided inside the slot, a sealing ring is installed at the bottom end of the lower sliding shoe, and a lubrication assembly is installed on the top of the swash plate;

[0009] A ball head is installed inside the sliding shoe, and a connecting bolt is fixedly connected to the outer surface of the ball head at the bottom, and a plunger is installed at the bottom of the connecting bolt;

[0010] The mounting holes are through the top and bottom of the swash plate. The bottom of the second fixing ring is provided with a hole for threaded connection with a bolt. The first fixing ring is fixedly connected to the outer surface of the sliding shoe at the top. The shape of the sliding shoe is referenced to Figure 3 The sealing ring can increase the sealing performance of the connection between the sliding shoe and the outer surface of the ball head. The connecting bolt passes through the sliding shoe and the sealing ring. The plunger and the connecting bolt can be connected by threads.

[0011] Preferably, the top of the inner wall of the upper sliding shoe is provided with an oil guide hole, and the inner surface of the lower sliding shoe is provided with an oil guide groove;

[0012] The oil guide hole passes through the fixing bolt, and the oil guide groove can collect the lubricating oil.

[0013] Preferably, the lubrication assembly comprises an oil ring, an oil return ring and a micro-delivery pump, and a filter box is installed on the top of the oil ring;

[0014] The oil ring, oil return ring and micro delivery pump are respectively installed at corresponding positions on the top end of the swash plate.

[0015] Preferably, a filter screen is installed inside the filter box, an oil drain pipe is fixedly connected to the bottom of the filter box, and a delivery pipe is fixedly connected to the top of the filter box;

[0016] The other end of the delivery pipe is connected to the outlet of the micro delivery pump, and the oil discharge pipe is inserted into the interior of the oil ring.

[0017] Preferably, a plurality of oil supply pipes are installed on the outer surface of the oil ring, and a suction pipe is fixedly connected to the inlet of the micro delivery pump;

[0018] The other end of the suction pipe is connected to the top of the oil return ring.

[0019] Preferably, the outer surface of the oil return ring is fixedly connected to a plurality of oil return pipes, and the other ends of the oil return pipes are all connected to the outer surface of the sliding shoe;

[0020] The other end of the oil return pipe corresponds to the position of the oil guide groove. The oil return pipe and the oil return ring are connected. The suction force generated by the micro-delivery pump can draw the lubricating oil inside multiple sliding shoes back to the inside of the oil return ring through the oil return pipe, and then be transported to the inside of the oil ring through the micro-delivery pump for reuse.

[0021] Compared with the related art, the axial piston pump slipper provided by the utility model has the following beneficial effects:

[0022] The utility model provides an axial piston pump slipper. In order to facilitate the disassembly and assembly of the slipper and the ball head on the plunger, the slipper is divided into an upper slipper and a lower slipper. The upper slipper is fixed to the mounting hole on the swash plate by a fixing bolt, and a second fixing ring with a threaded hole is fixedly connected to the outer surface of the upper slipper at the bottom end. Thereafter, it is only necessary to connect the first fixing ring at the top of the outer surface of the lower shoe with the second fixing ring through bolts to form a complete detachable slipper. In order to increase the sealing between the upper slipper and the lower shoe, a card groove is opened between the two, and then the sealing ring can be installed inside the card groove. Through this design, the overall slipper is divided into an upper slipper and a lower shoe. Without affecting the sealing and normal operation, the connection between the ball head on the plunger and the slipper is facilitated, and the difficulty of disassembly and assembly is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic structural diagram of a preferred embodiment of the axial piston pump sliding shoe provided by the utility model;

[0024] Figure 2 Provides a structural diagram of the mounting hole for the utility model;

[0025] Figure 3 Provided for the utility model Figure 2 An enlarged view of point A is shown;

[0026] Figure 4 Provides a structural diagram of the oil ring for the utility model;

[0027] Figure 5 Provided for the utility model Figure 4 An enlarged view of point B is shown;

[0028] Figure 6 The utility model provides a structural schematic diagram of a filter screen.

[0029] Numbers in the figure: 1. swash plate, 2. upper sliding shoe, 3. lower sliding shoe, 4. connecting bolt, 5. plunger, 6. lubrication assembly, 601. oil ring, 602. oil supply pipe, 603. oil return ring, 604. oil return pipe, 605. suction pipe, 606. micro delivery pump, 607. filter box, 608. delivery pipe, 609. filter screen, 610. oil drain pipe, 7. fixing bolt, 8. mounting hole, 9. sealing ring, 10. oil guide groove, 11. bolt, 12. first fixing ring, 13. sealing ring, 14. slot, 15. second fixing ring, 16. oil guide hole, 17. ball head. DETAILED DESCRIPTION

[0030] The present invention will be further described below with reference to the accompanying drawings and implementation examples.

[0031] Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 ,in, Figure 1 A schematic structural diagram of a preferred embodiment of the axial piston pump sliding shoe provided by the utility model; Figure 2 Provides a structural diagram of the mounting hole for the utility model; Figure 3 Provided for the utility model Figure 2 An enlarged view of point A is shown;

[0032] Figure 4 Provides a structural diagram of the oil ring for the utility model; Figure 5 Provided for the utility model Figure 4 An enlarged view of point B is shown; Figure 6 The utility model provides a structural diagram of the filter screen. The axial piston pump shoe includes: a swash plate 1;

[0033] A plurality of mounting holes 8 are provided on the top of the swash plate 1. A fixing bolt 7 is installed inside each mounting hole 8. The bottom end of each fixing bolt 7 is fixedly connected to the upper sliding shoe 2. The outer surface of the upper sliding shoe 2 is fixedly connected to a second fixing ring 15 at the bottom end. A first fixing ring 12 is installed on the bottom of the second fixing ring 15 via a bolt 11. The inner surface of the first fixing ring 12 is fixedly connected to the lower sliding shoe 3. A slot 14 is provided at one end adjacent to the upper sliding shoe 2. A sealing ring 13 is provided inside the slot 14. A sealing ring 9 is installed at the bottom end of the lower sliding shoe 3. A lubrication assembly 6 is installed on the top of the swash plate 1.

[0034] The ball head 17 is installed inside the sliding shoe 3. The outer surface of the ball head 17 is fixedly connected to the connecting bolt 4 at the bottom. The bottom of the connecting bolt 4 is installed with a plunger 5;

[0035] The mounting hole 8 is through the top and bottom of the swash plate 1. The bottom of the second fixing ring 15 is provided with a hole threadedly connected to the bolt 11. The first fixing ring 12 is fixedly connected to the outer surface of the lower shoe 3 at the top. The shape of the lower shoe 3 is as shown in FIG. Figure 3 The sealing ring 9 can increase the sealing performance of the connection between the sliding shoe 3 and the outer surface of the ball head 17. The connecting bolt 4 passes through the sliding shoe 3 and the sealing ring 9. The plunger 5 and the connecting bolt 4 can be connected by threads. The fixing bolt 7 and the mounting hole 8 can also be connected by threads, but the tightening direction of the thread corresponds to the rotation direction of the swash plate 1.

[0036] The top of the inner wall of the upper sliding shoe 2 is provided with an oil guide hole 16, and the inner surface of the lower sliding shoe 3 is provided with an oil guide groove 10;

[0037] The oil guide hole 16 passes through the fixing bolt 7, and the oil guide groove 10 can collect the lubricating oil for easy recycling.

[0038] The lubrication assembly 6 includes an oil ring 601, an oil return ring 603 and a micro delivery pump 606. A filter box 607 is installed on the top of the oil ring 601;

[0039] The oil ring 601, the oil return ring 603 and the micro delivery pump 606 are respectively installed at the corresponding positions on the top of the swash plate 1. For details, please refer to Figure 1 .

[0040] A filter screen 609 is installed inside the filter box 607, an oil drain pipe 610 is fixedly connected to the bottom of the filter box 607, and a delivery pipe 608 is fixedly connected to the top of the filter box 607;

[0041] The other end of the delivery pipe 608 is connected to the outlet of the micro delivery pump 606. The oil discharge pipe 610 is inserted into the interior of the oil ring 601, and the lubricating oil can be filtered and reused.

[0042] The outer surface of the oil ring 601 is installed with multiple oil supply pipes 602, and the inlet of the micro delivery pump 606 is fixedly connected with a suction pipe 605;

[0043] The other end of the suction pipe 605 is connected to the top of the oil return ring 603, and can cooperate with the micro-transfer pump 606 to recover the lubricant inside the sliding shoe.

[0044] The outer surface of the oil return ring 603 is fixedly connected to a plurality of oil return pipes 604 , and the other ends of the oil return pipes 604 are connected to the outer surface of the sliding shoe 3 ;

[0045] The other end of the oil return pipe 604 corresponds to the position of the oil guide groove 10, so that the lubricating oil inside the oil guide groove 10 can be recovered and reused.

[0046] The working principle of the axial piston pump slipper provided by the utility model is as follows:

[0047] The sliding shoe is divided into an upper sliding shoe 2 and a lower sliding shoe 3, and the upper sliding shoe 2 is fixed to the mounting hole 8 on the swash plate 1 by a fixing bolt 7. A second fixing ring 15 with a threaded hole is fixedly connected to the outer surface of the upper sliding shoe 2 at the bottom end. Then, it is only necessary to connect the first fixing ring 12 at the top of the outer surface of the lower sliding shoe 3 with the second fixing ring 15 through the bolt 11 to form a complete detachable sliding shoe. In order to increase the sealing between the upper sliding shoe 2 and the lower sliding shoe 3, a card groove 14 is opened between the two, and then the sealing ring 13 is installed inside the card groove 14. In actual use, the lower sliding shoe 3 is first put on the outer surface of the connecting bolt 4, and then the connecting bolt 4 and the plunger 5 are connected. Then, the ball head 17 on the connecting bolt 4 is inserted into the interior of the upper sliding shoe 2, and the first fixing ring 12 and the second fixing ring 15 are aligned. The first fixing ring 12 and the second fixing ring 15 can be connected by the bolt 11. Finally, it is only necessary to install the fixing bolt 7 inside the mounting hole 8.

[0048] Compared with the related art, the axial piston pump slipper provided by the utility model has the following beneficial effects:

[0049] In order to facilitate the disassembly and assembly of the sliding shoe and the ball head 17 on the plunger 5, the sliding shoe is divided into an upper sliding shoe 2 and a lower sliding shoe 3, and the upper sliding shoe 2 is fixed to the mounting hole 8 on the swash plate 1 by a fixing bolt 7, and a second fixing ring 15 with a threaded hole is fixedly connected to the outer surface of the upper sliding shoe 2 at the bottom end. Then, it is only necessary to connect the first fixing ring 12 at the top of the outer surface of the lower sliding shoe 3 through the bolt 11 and the second fixing ring 15 to form a complete detachable sliding shoe. In order to increase the sealing between the upper sliding shoe 2 and the lower sliding shoe 3, a card groove 14 is opened between the two, and then the sealing ring 13 is installed inside the card groove 14. Through this design, the entire sliding shoe is divided into an upper sliding shoe 2 and a lower sliding shoe 3. Without affecting the sealing and normal operation, the connection between the ball head 17 on the plunger 5 and the sliding shoe is facilitated, and the difficulty of disassembly and assembly is reduced.

[0050] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. Axial piston pump shoe, characterized in that: include: swash plate; a plurality of mounting holes, wherein the plurality of mounting holes are opened at the top of the swash plate, a fixing bolt is installed inside each mounting hole, the bottom end of each fixing bolt is fixedly connected to an upper sliding shoe, the outer surface of the upper sliding shoe is fixedly connected to a second fixing ring at a position at the bottom end, the bottom of the second fixing ring is fixedly connected to a first fixing ring by a bolt, the inner surface of the first fixing ring is fixedly connected to a lower sliding shoe, a slot is opened at one end adjacent to the lower sliding shoe, a sealing ring is provided inside the slot, a sealing ring is installed at the bottom end of the lower sliding shoe, and a lubrication assembly is installed on the top of the swash plate; The ball head is installed inside the sliding shoe, and the outer surface of the ball head is fixedly connected to a connecting bolt at the bottom, and a plunger is installed at the bottom of the connecting bolt.

2. The axial piston pump shoe according to claim 1, characterized in that: The top of the inner wall of the upper sliding shoe is provided with an oil guide hole, and the inner surface of the lower sliding shoe is provided with an oil guide groove.

3. The axial piston pump shoe according to claim 1, characterized in that: The lubrication assembly comprises an oil ring, an oil return ring and a micro-delivery pump, and a filter box is installed on the top of the oil ring.

4. The axial piston pump shoe according to claim 3, characterized in that: A filter screen is installed inside the filter box, an oil drain pipe is fixedly connected to the bottom of the filter box, and a delivery pipe is fixedly connected to the top of the filter box.

5. The axial piston pump shoe according to claim 3, characterized in that: A plurality of oil supply pipes are installed on the outer surface of the oil ring, and a suction pipe is fixedly connected to the inlet of the micro delivery pump.

6. The axial piston pump shoe according to claim 3, characterized in that: A plurality of oil return pipes are fixedly connected to the outer surface of the oil return ring, and the other ends of the oil return pipes are all connected to the outer surface of the sliding shoe.

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