Swash plate type axial plunger pump

Abstract

The utility model discloses a swash plate type axial plunger pump which comprises a pump body shell, a driving bin and a conveying bin are arranged in the pump body shell, a driving motor is installed on the outer side of the pump body shell, an output shaft of the driving motor penetrates into an inner cavity of the driving bin and is fixedly provided with a rotary plate, and a piston rod is movably arranged in an inner cavity of the conveying bin. A piston column is fixed to one end of the piston rod, the piston rod is sleeved with a sleeve, the sleeve and the other end of the piston rod penetrate into an inner cavity of the driving bin, and the other end of the piston rod is movably connected with the rotary disc. In the utility model, the sleeve is sleeved on the outer side of the piston rod and is used as a transition piece between the piston rod and the pump body shell, so that not only can the abrasion between the piston rod and the pump body shell be reduced, but also the noise generated by the abrasion can be reduced as the transition piece, and the sleeve can support the piston rod tightly to ensure the stability of the piston rod; when the turntable rotates, the piston rod is prevented from generating force tangent to the rotating direction of the turntable due to the inclined surface of the turntable, and shaking of the piston rod is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of plunger pumps, and more specifically, to an inclined-plate axial plunger pump. Background Art

[0002] A plunger pump is an important device in a hydraulic system. It relies on the reciprocating movement of a plunger in a cylinder block to change the volume of a 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 regulation.

[0003] In the prior art, a Chinese utility model with the publication number CN216788626U discloses an inclined-plate axial plunger pump, which includes a housing and a liquid pumping unit; Housing: A rotating rod is rotatably connected through a bearing in an opening provided on the left-end inclined surface thereof; Liquid pumping unit: It includes an inclined plate, a universal ball joint, a connecting rod, a plunger, a distribution plate, a rotating plate, a cylinder block, and a ceramic washer. The inclined plate is arranged on the outer arc surface of the right end of the rotating rod. Uniformly distributed universal ball joints are provided on the right end surface of the inclined plate. Connecting rods are provided at the right ends of the universal ball joints. Plungers are provided at the right ends of the connecting rods. Ceramic washers are sleeved in grooves provided on the outer arc surfaces of the right ends of the plungers. A distribution plate is provided on the right wall surface of the inner cavity of the housing. The left end surface of the distribution plate is slidably connected with a rotating plate through an annular sliding groove. Cylinder blocks are provided at openings uniformly arranged on the left end surface of the rotating plate. This inclined-plate axial plunger pump meets the purpose of different high and low speed regulation of the inclined-plate axial plunger pump and reduces the noise during the operation of the entire inclined-plate axial plunger pump.

[0004] In the above technical solution, while the rotating rod drives the inclined plate to rotate, it is necessary to drive the rotating plate to rotate together through the connecting rod and the cylinder block to ensure that the plunger makes telescopic movements in the cylinder block. Due to the rotation of the rotating plate, it causes friction between the plunger and the inner wall of the cylinder block. After long-term operation, it not only causes wear of the plunger and the cylinder block, but also generates noise during operation, resulting in excessive wear of the equipment parts and reducing the service life of the equipment.

[0005] Therefore, a new solution needs to be proposed to solve the above problems. Summary of the Utility Model

[0006] The purpose of the utility model is to overcome the above deficiencies of the prior art and provide an inclined-plate axial plunger pump.

[0007] To achieve the above purpose, the utility model adopts the following technical solutions:

[0008] An inclined disk type axial piston pump includes a pump body housing. Inside the pump body housing, there is a drive chamber and a delivery chamber. A drive motor is installed outside the pump body housing. The output shaft of the drive motor penetrates into the inner cavity of the drive chamber and is fixed with a turntable. A piston rod is movably arranged in the inner cavity of the delivery chamber. One end of the piston rod is fixed with a piston column. The piston rod is sleeved with a sleeve. Both the sleeve and the other end of the piston rod penetrate into the inner cavity of the drive chamber. The other end of the piston rod is movably connected to the turntable. Chambers are communicated with the top and bottom of the pump body housing respectively. One end of the two chambers away from the pump body housing is communicated with a liquid inlet pipe and a liquid outlet pipe respectively. An adjustment assembly is arranged in the inner cavity of the chamber.

[0009] Further, the adjustment assembly includes a sphere located inside the chamber. A first spring is fixed to the outside of the sphere. The end of the first spring away from the sphere is fixed to the inner wall of the chamber.

[0010] Further, an annular chute is formed at one end of the turntable away from the drive motor. A connecting member is slidably connected to the inner cavity of the annular chute. One end of the connecting member penetrates to the outside of the annular chute and is fixedly connected to the other end of the piston rod.

[0011] Further, a through hole is formed at the center of the piston column. One end of the piston rod is located inside the through hole. Two limit nuts are threadedly connected to one end of the piston rod. The limit nuts are located on both sides of the piston column.

[0012] Further, a limit circlip is clamped to one end of the piston rod. The limit circlip is located outside the limit nut.

[0013] Further, a second spring is sleeved on the outside of the sleeve. One end of the second spring is fixed to the sleeve. The other end of the second spring is fixed to the inner wall of the delivery chamber. A third spring is fixed to one side of the piston column. The end of the third spring is fixed to the inner wall of the delivery chamber. The third spring is located outside the second spring.

[0014] Further, a limit groove is formed on the inner wall of the drive chamber. A limit block is slidably connected to the inner cavity of the limit groove. One side of the limit block penetrates the limit groove and is fixed to the surface of the turntable.

[0015] The beneficial effects of the present utility model are:

[0016] 1. In the present utility model, by sleeving a sleeve outside the piston rod, the sleeve serves as a transition piece between the piston rod and the pump body housing. It can not only reduce the wear between the piston rod and the pump body housing, but also, as a transition piece, reduce the noise generated by wear. Moreover, the sleeve can tightly support the piston rod to ensure the piston rod is stable, avoiding the situation where when the turntable rotates, due to the inclined plane of the turntable, a force tangent to the rotation direction of the turntable is generated on the piston rod, causing the piston rod to shake and affecting the force relationship between the piston column and the conveying bin.

[0017] 2. In the present utility model, through the cooperation of the second spring and the third spring, they act on the piston column and the sleeve respectively to reduce the loss of the connecting piece and improve the service life of the connecting piece. Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of an axial piston pump with an inclined disk in this embodiment;

[0019] Figure 2 is a schematic cross-sectional structural diagram of the pump body housing in this embodiment;

[0020] Figure 3 is a schematic connection structural diagram of the piston rod and the sleeve in this embodiment;

[0021] Figure 4 is a schematic disassembled structural diagram of the piston rod and the sleeve in this embodiment;

[0022] Figure 5 is a schematic cross-sectional structural diagram of the chamber in this embodiment.

[0023] Reference Numerals: Pump body housing 1, drive chamber 2, conveying chamber 3, drive motor 4, turntable 5, piston rod 6, piston column 7, sleeve 8, chamber 9, liquid inlet pipe 10, liquid outlet pipe 11, adjustment assembly 12, sphere 121, first spring 122, annular chute 13, connecting piece 14, limit nut 15, second spring 16, third spring 17, limit snap ring 18, limit groove 19, limit block 20. Detailed Embodiments

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0025] Embodiment: An axial piston pump with an inclined disk, as Figures 1 - 5As shown in the figure, it includes a pump body housing 1. Inside the pump body housing 1, there is a drive chamber 2 and a delivery chamber 3. A drive motor 4 is installed on the outside of the pump body housing 1. The output shaft of the drive motor 4 penetrates into the inner cavity of the drive chamber 2 and is fixed with a turntable 5. A piston rod 6 is movably arranged in the inner cavity of the delivery chamber 3. One end of the piston rod 6 is fixed with a piston column 7. The piston rod 6 is sleeved with a sleeve 8. Both the sleeve 8 and the other end of the piston rod 6 penetrate into the inner cavity of the drive chamber 2. The other end of the piston rod 6 is movably connected to the turntable 5. Chambers 9 are communicated with both the top and bottom of the pump body housing 1. One end of each of the two chambers 9 away from the pump body housing 1 is respectively communicated with a liquid inlet pipe 10 and a liquid outlet pipe 11. An adjusting component 12 is arranged in the inner cavity of the chamber 9. Among them, the piston column 7 integrates a sealing ring, and the sealing ring is installed on the outside of the piston column 7.

[0026] By sleeving a sleeve 8 on the outside of the piston rod 6, the sleeve 8, as a transition piece between the piston rod 6 and the pump body housing 1, can not only reduce the wear between the piston rod 6 and the pump body housing 1, but also, as a transition piece, reduce the noise generated by wear. Moreover, the sleeve 8 can tightly support the piston rod 6 to ensure the stability of the piston rod 6 and avoid the generation of a force tangent to the rotation direction of the turntable 5 on the piston rod 6 due to the inclined surface of the turntable 5 when the turntable 5 rotates, causing the piston rod 6 to shake and affecting the force relationship between the piston column 7 and the delivery chamber 3.

[0027] As Figure 5 shown in the figure, the adjusting component 12 includes a sphere 121 located inside the chamber 9. A first spring 122 is fixed on the outside of the sphere 121. The end of the first spring 122 away from the sphere 121 is fixed on the inner wall of the chamber 9. By supporting the sphere 121 through the first spring 122, it is convenient to drive the sphere 121 to move when the pressure in the delivery chamber 3 changes, and it is respectively communicated with the liquid inlet pipe 10 and the liquid outlet pipe 11.

[0028] As Figure 2 shown in the figure, one end of the turntable 5 away from the drive motor 4 is an inclined surface, and an annular sliding groove 13 is opened. A connecting piece 14 is slidably connected in the inner cavity of the annular sliding groove 13. One end of the connecting piece 14 penetrates to the outside of the annular sliding groove 13 and is fixedly connected with the other end of the piston rod 6. By sliding the connecting piece 14 in the inner cavity of the annular sliding groove 13, when the turntable 5 rotates, the inclined surface of the turntable 5 is used to drive the piston rod 6 to perform telescopic movement, and then the pressure in the delivery chamber 3 is adjusted through the piston column 7.

[0029] As Figure 3 and Figure 4As shown, a through hole is provided at the center of the piston column 7. One end of the piston rod 6 is located inside the through hole. Two limit nuts 15 are threadedly connected to one end of the piston rod 6, and the limit nuts 15 are located on both sides of the piston column 7. Through the arrangement of the limit nuts 15, it is convenient to install the piston column 7, ensure the stable connection between the piston rod 6 and the piston column 7, and prevent the piston column 7 from shaking outside the piston rod 6, resulting in excessive wear of the piston column 7, the pump body housing 1, and the piston rod 6.

[0030] A second spring 16 is sleeved outside the sleeve 8. One end of the second spring 16 is fixed on the sleeve 8, and the other end of the second spring 16 is fixed on the inner wall of the conveying chamber 3. A third spring 17 is fixed on one side of the piston column 7, and the end of the third spring 17 is fixed on the inner wall of the conveying chamber 3. The third spring 17 is located outside the second spring 16. Through the cooperation of the third spring 17 and the second spring 16, they act on the piston column 7 and the sleeve 8 respectively, reducing the loss of the connecting member 14 and improving the service life of the connecting member 14.

[0031] A limit retaining ring 18 is clamped at one end of the piston rod 6, and the limit retaining ring 18 is located outside the limit nut 15. Through the arrangement of the limit retaining ring 18, it is convenient to limit the limit nut 15 and prevent the piston rod 6 from rotating around the turntable 5 driven by the connecting member 14, resulting in the rotation of the piston rod 6 and causing the limit nut 15 to rotate on the piston rod 6, affecting the stability of the piston column 7.

[0032] As Figure 2 shown, a limit groove 19 is provided on the inner wall of the drive chamber 2. The inner cavity of the limit groove 19 is slidably connected with a limit block 20, and one side of the limit block 20 penetrates through the limit groove 19 and is fixed on the surface of the turntable 5. By sliding the limit block 20 in the limit groove 19, it is convenient to limit and stabilize the turntable 5 and prevent the turntable 5 from shaking during rotation.

[0033] During use, the drive motor 4 drives the turntable 5 to rotate. The annular chute 13 on the inclined surface of the turntable 5 drives the connecting member 14 to perform telescopic movement on the piston rod 6. When the piston rod 6 moves towards the conveying chamber 3, the piston column 7 is driven by the piston rod 6 to move quickly and separate from the sleeve 8. Then the piston column 7 stretches the third spring 17, and at the same time, the second spring 16 supports the sleeve 8 to move into the conveying chamber 3. The sleeve 8 can be used to support the piston rod 6 to ensure the stability of the piston rod 6; when the piston rod 6 is pulled towards the drive chamber 2 by the connecting member 14, the piston column 7 is pulled by the third spring 17 to assist the movement of the piston column 7. At the same time, the piston column 7 squeezes the sleeve 8 to compress the second spring 16. Under the protection of the sleeve 8, the piston rod 6 can not only reduce the noise generated by friction with the pump body housing 1, but also extend the service life.

[0034] The above are only the preferred embodiments of the present utility model, and the protection scope of the present utility model is not limited to the above embodiments. All technical solutions falling within the concept of the present utility model belong to the protection scope of the present utility model. It should be noted that for those of ordinary skill in the art, several improvements and refinements made without departing from the principle of the present utility model should also be regarded as within the protection scope of the present utility model.

Claims

1. An inclined disk type axial piston pump, comprising a pump body housing (1), characterized in that, Inside the pump body housing (1), there is a drive chamber (2) and a delivery chamber (3). A drive motor (4) is installed on the outside of the pump body housing (1). The output shaft of the drive motor (4) penetrates into the inner cavity of the drive chamber (2) and is fixed with a turntable (5). A piston rod (6) is movably arranged in the inner cavity of the delivery chamber (3). One end of the piston rod (6) is fixed with a piston column (7). The piston rod (6) is sleeved with a sleeve (8). The sleeve (8) and the other end of the piston rod (6) both penetrate into the inner cavity of the drive chamber (2). The other end of the piston rod (6) is movably connected to the turntable (5). Chambers (9) are communicated with the top and bottom of the pump body housing (1) respectively. One end of each of the two chambers (9) far away from the pump body housing (1) is communicated with a liquid inlet pipe (10) and a liquid outlet pipe (11) respectively. An adjusting component (12) is arranged in the inner cavity of the chamber (9).

2. The axial piston pump with swash plate according to claim 1, characterized in that, The adjusting component (12) includes a sphere (121) located inside the chamber (9). A first spring (122) is fixed on the outside of the sphere (121). The end of the first spring (122) far away from the sphere (121) is fixed on the inner wall of the chamber (9).

3. The axial piston pump with swash plate according to claim 1, characterized in that, An annular chute (13) is opened at one end of the turntable (5) far away from the drive motor (4). A connecting piece (14) is slidably connected in the inner cavity of the annular chute (13). One end of the connecting piece (14) penetrates to the outside of the annular chute (13) and is fixedly connected to the other end of the piston rod (6).

4. The axial piston pump with swash plate according to claim 1, characterized in that, A through hole is opened at the center of the piston column (7). One end of the piston rod (6) is located inside the through hole. Two limit nuts (15) are threadedly connected to one end of the piston rod (6). The limit nuts (15) are located on both sides of the piston column (7).

5. The axial piston pump with swash plate according to claim 4, characterized in that, A limit circlip (18) is clamped at one end of the piston rod (6). The limit circlip (18) is located outside the limit nut (15).

6. A swash plate type axial piston pump according to claim 1, characterized in that, A second spring (16) is sleeved on the outside of the sleeve (8). One end of the second spring (16) is fixed on the sleeve (8). The other end of the second spring (16) is fixed on the inner wall of the delivery chamber (3). A third spring (17) is fixed on one side of the piston column (7). The end of the third spring (17) is fixed on the inner wall of the delivery chamber (3). The third spring (17) is located outside the second spring (16).

7. The swash plate type axial piston pump according to claim 1, wherein A limit groove (19) is opened on the inner wall of the drive chamber (2). A limit block (20) is slidably connected in the inner cavity of the limit groove (19). One side of the limit block (20) penetrates through the limit groove (19) and is fixed on the surface of the turntable (5).

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