Small axial piston water pump

Abstract

The utility model provides a small axial piston water pump, and belongs to the technical field of water pumps. The problem that in the prior art, the interior of a water pump is prone to abrasion is solved. The pump comprises a pump body and a pump cover, the pump cover is fixedly installed at one end of the pump body, a piston assembly is fixedly installed in the pump body, the piston assembly comprises a piston limiting barrel, a plurality of piston columns, a wear-resisting plate, piston feet and a bevel plate, the number of the piston columns is the same as that of the piston feet, and one ends of the piston columns are connected with the piston feet. One end of the piston limiting cylinder is fixedly connected with the inner side face of the pump cover, a plurality of limiting holes are formed in the piston limiting cylinder, the other end of the piston column extends into the limiting holes, the wear-resisting plate is fixedly connected to one side of the bevel plate, and one end of the piston foot is fixed to the wear-resisting plate in an attached mode. A second pump shaft through hole is formed in the center of the bevel plate, and a pump shaft is arranged in the pump body and sequentially penetrates through the first pump shaft through hole and the second pump shaft through hole. The utility model has the advantages of stable structure and long service life, and is not easy to wear.

Description

Technical Field

[0001] The utility model belongs to the technical field of water pumps and relates to a small axial piston water pump. Background Art

[0002] The piston pump relies on the reciprocating motion of the piston to cause the working volume of the pump chamber to change periodically, thereby achieving the suction and discharge of liquid. The piston pump is suitable for high pressure and small flow occasions.

[0003] A Chinese patent with publication number CN201358900Y discloses a piston water pump, comprising a water outlet pipe, a water inlet pipe, a pump body, a cylinder sleeve horizontally placed in the pump body, a piston and a piston ring slidable in the cylinder sleeve, the piston is connected to the main shaft as a whole, a water seal is installed in the central inner hole of the pump body cover and is sleeved on the main shaft, the pump body cover is connected to the right side of the pump body and closes the right opening, a water outlet valve control member is located above the water outlet valve seat and is also connected to the pump body, the water outlet cover is connected to the water outlet valve control member, there is a water outlet cavity between the water outlet cover and the water outlet valve seat, the water outlet pipe is connected to the water outlet cover and is connected to the water outlet cavity, the bottom surface of the pump body is connected to the water inlet valve control member, the bottom surface of the water inlet valve control member is connected to the water inlet valve seat and the water inlet cover in turn, the water inlet valve seat closes the bottom of the left and right working chambers, there is a water inlet cavity between the water inlet cover and the water inlet valve seat, and the water inlet pipe is connected to the water inlet cover and is connected to the water inlet cavity.

[0004] The patent provides a piston-type water pump whose internal piston is prone to wear after repeated operation, thus shortening its service life. Utility Model Content

[0005] The utility model aims to provide a small axial piston water pump to solve the above problems in the prior art.

[0006] The purpose of the utility model can be achieved through the following technical solutions: a small axial piston water pump, comprising a pump body and a pump cover, the pump cover is fixedly installed at one end of the pump body, a piston assembly is fixedly installed inside the pump body, the piston assembly comprises a piston limiting cylinder, a piston column, a wear-resistant plate, a piston foot and a bevel disk, the number of the piston column and the piston foot is several and the number is the same, one end of the piston column is connected to the piston foot, one end of the piston limiting cylinder is fixedly connected to the inner side of the pump cover, a plurality of limiting holes are opened in the piston limiting cylinder, the other end of the piston column extends into the limiting hole, the wear-resistant plate is fixedly connected to one side of the bevel disk, one end of the piston foot is fitted and fixed on the wear-resistant plate, a first pump shaft through hole is opened in the center of the piston limiting cylinder, a second pump shaft through hole is opened at the center of the bevel disk, a pump shaft is arranged inside the pump body and the pump shaft passes through the first pump shaft through hole and the second pump shaft through hole in sequence.

[0007] In the above-mentioned small axial piston water pump, a fixing plate is arranged on the piston assembly, a plurality of fixing holes are opened on the fixing plate, the fixing holes pass through the piston foot, and the fixing plate is sleeved on the outside of the piston foot.

[0008] In the above-mentioned small axial piston water pump, a piston fixing seat is arranged inside the pump body, and the bevel plate is fixedly connected to the piston fixing seat.

[0009] In the above-mentioned small axial piston water pump, a water inlet and a water outlet are provided on the pump cover.

[0010] In the above-mentioned small axial piston water pump, a radial ball bearing is sleeved and fixed on the pump shaft, a sealing ring is sleeved and fixed on the pump shaft on one side of the radial ball bearing, and the sealing ring is in contact with the inner side of the pump cover.

[0011] Compared with the prior art, the small axial piston water pump provided by the utility model has the following beneficial effects: 1. By arranging a piston limiting cylinder inside the pump body, the piston limiting cylinder is fixedly connected to the inner side of the pump cover, and the piston column extends into the piston limiting cylinder through the limiting hole, the piston limiting cylinder limits the piston column in the axial direction, effectively ensuring that the piston column will not deviate during operation; 2. A wear-resistant plate is arranged on the inner side of the bevel disk, and the piston foot is fixedly connected to the wear-resistant plate, which effectively improves the service life of the piston assembly, and a fixed plate is sleeved on the outer side of the piston foot, which further improves the stability of the piston assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 It is a side sectional structural diagram of the utility model;

[0014] Figure 3 It is a schematic diagram of the structure of the utility model after removing the pump body;

[0015] Figure 4 It is a schematic diagram of the explosion structure of the piston assembly;

[0016] Figure 5 It is a schematic diagram of the internal structure of the pump body.

[0017] In the figure: 1. pump body; 11. piston fixing seat; 2. pump cover; 21. water inlet; 22. water outlet; 3. piston assembly; 31. piston limiting cylinder; 311. limiting hole; 312. first pump shaft through hole; 32. piston column; 33. wear-resistant plate; 34. piston foot; 35. ramp plate; 351. second pump shaft through hole; 36. fixing plate; 4. pump shaft; 41. radial ball bearing; 42. sealing ring. DETAILED DESCRIPTION

[0018] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0019] like Figures 1 to 5 As shown, this embodiment includes a pump body 1 and a pump cover 2, the pump cover 2 is fixedly installed at one end of the pump body 1, the piston assembly 3 is fixedly installed inside the pump body 1, the piston assembly 3 includes a piston limiting cylinder 31, a piston column 32, a wear-resistant plate 33, a piston foot 34 and a bevel plate 35, the number of piston columns 32 and piston feet 34 is the same and they are arranged in a circular array, a plurality of limiting holes 311 are opened in the piston limiting cylinder 31, the number and position of the limiting holes 311 are the same as those of the piston column 32, one end of the piston column 32 is connected to the piston foot 34 and the other end of the piston column 32 The piston limit cylinder 31 is connected to the limit hole 311, one end of the piston limit cylinder 31 is fixedly connected to the inner side of the pump cover 2, the outer side of the bevel disk 35 is a bevel and the inner side is a plane, the wear-resistant plate 33 is fixedly connected to the plane side of the bevel disk 35, one end of the piston foot 34 is fitted and fixed on the wear-resistant plate 33, the diameter of the piston foot 34 close to the wear-resistant plate 33 is larger than the diameter close to the piston column 32, the fixed plate 36 is fixed to the piston foot 34 through the fixing hole, and one side of the fixed plate 36 is fitted and fixed to the side of the piston foot 34 with a larger diameter.

[0020] like Figures 1 to 5 As shown, a first pump shaft through hole 312 is opened at the center of the piston limit cylinder 31, a second pump shaft through hole 351 is opened at the center of the bevel disk 35, the pump shaft 4 passes through the first pump shaft through hole 312 and the second pump shaft through hole 351 in sequence and extends out of one side of the pump body 1, a radial ball bearing 41 is fixed at the connection point where the pump shaft 4 extends out of the pump body 1, a sealing ring 42 is sleeved on the pump shaft 4 on one side of the radial ball bearing 41, and the sealing ring 42 is fitted and fixed to the inner wall of the pump body 1.

[0021] To elaborate further, Figure 5 As shown, a piston fixing seat 11 is arranged inside the pump body 1. The piston fixing seat 11 covers the outer periphery of the bevel plate 35 and fixes the bevel plate 35 inside the piston fixing seat 11. The piston fixing seat 11 plays a role in stabilizing and fixing the piston assembly 3 as a whole.

[0022] To elaborate further, Figure 1 As shown, the pump cover 2 is provided with a through water inlet 21 and a water outlet 22 , and the water inlet 21 and the water outlet 22 are arranged in a longitudinally stacked manner.

[0023] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0024] Although various terms are used more frequently in this article, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A small axial piston water pump, comprising a pump body (1) and a pump cover (2), wherein the pump cover (2) is fixedly mounted on one end of the pump body (1), and a piston assembly (3) is fixedly mounted inside the pump body (1), characterized in that: The piston assembly (3) comprises a piston limiting cylinder (31), a piston column (32), a wear-resistant plate (33), a piston foot (34) and a bevel plate (35). The number of the piston column (32) and the piston foot (34) is the same. One end of the piston column (32) is connected to the piston foot (34). One end of the piston limiting cylinder (31) is fixedly connected to the inner side of the pump cover (2). The piston limiting cylinder (31) is provided with a plurality of limiting holes (311). The other end of the piston column (32) is connected to the inner side of the pump cover (2). The piston end of the piston limit cylinder (31) extends into the limiting hole (311), the wear-resistant plate (33) is fixedly connected to one side of the inclined plate (35), one end of the piston foot (34) is fixedly fitted on the wear-resistant plate (33), a first pump shaft through hole (312) is provided at the center of the piston limiting cylinder (31), a second pump shaft through hole (351) is provided at the center of the inclined plate (35), a pump shaft (4) is provided inside the pump body (1), and the pump shaft (4) passes through the first pump shaft through hole (312) and the second pump shaft through hole (351) in sequence.

2. A small axial piston water pump according to claim 1, characterized in that: The piston assembly (3) is provided with a fixing plate (36), the fixing plate (36) is provided with a plurality of fixing holes, the fixing holes pass through the piston foot (34), and the fixing plate (36) is sleeved on the outside of the piston foot (34).

3. A small axial piston water pump according to claim 1, characterized in that: A piston fixing seat (11) is arranged inside the pump body (1), and the inclined plate (35) is fixedly connected to the piston fixing seat (11).

4. A small axial piston water pump according to claim 1, characterized in that: The pump cover (2) is provided with a water inlet (21) and a water outlet (22).

5. A small axial piston water pump according to claim 1, characterized in that: A radial ball bearing (41) is sleeved and fixed on the pump shaft (4), and a sealing ring (42) is sleeved and fixed on the pump shaft (4) on one side of the radial ball bearing (41), and the sealing ring (42) is in contact with the inner side of the pump cover (2).

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