Piston structure

Abstract

The utility model discloses a piston structure which comprises a body. The top of the body is provided with a water tank, the outer side surface of the water tank is convexly provided with a sealing convex rib, the sealing convex rib is provided with a sealing convex point, and the bottom of the body is provided with a mounting cavity for mounting a piston rod. The water tank is formed in the top of the body, the sealing protruding rib is arranged on the outer side face of the water tank in a protruding mode, the sealing protruding point is arranged on the sealing protruding rib in a matched mode, the sealing protruding point is in close contact with the inner wall face of the pump body, and the friction force between the sealing protruding point and the inner wall face of the pump body is small through the point contact mode; in addition, tight contact with the inner wall face of the pump body can be achieved, the sealing performance of the piston pump is guaranteed, the water pressure in the water tank provides an outward inner side for the sealing protruding point, and the sealing performance of the piston pump is further guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of piston pump technology, in particular to a piston structure. Background Art

[0002] An oral irrigator is an auxiliary tool for cleaning the oral cavity. It uses pulsed water flow to clean teeth and interdental spaces. There are mainly desktop irrigators and portable handheld irrigators. The general flushing pressure is 0 to 90 psi. An oral irrigator mainly includes a water pump, a nozzle and other structures. The water pump used is generally a piston pump. In order to achieve a better sealing performance of the piston body in the piston pump so that it can pump out high-speed water flow, a sealing ring is usually added to the piston.

[0003] Although the sealing ring is set on the piston body, it can improve the sealing performance of the piston pump, but it brings greater friction to the piston body, and the design of the sealing ring makes the structure of the piston body complicated and increases the production cost. Therefore, it is necessary to propose a new solution to improve the above problems. Utility Model Content

[0004] In view of this, the present invention aims to improve the defects of the prior art, and its main purpose is to provide a piston structure which can effectively solve the problem that the existing piston pumps have a sealing ring on the piston body to improve the sealing performance, which complicates the structure of the piston body and increases the production cost.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A piston structure comprises a body; a water groove is provided on the top of the body, a sealing rib is convexly provided on the outer surface of the water groove, the sealing rib has a sealing convex point, and an installation cavity for installing with a piston rod is provided at the bottom of the body.

[0007] As a preferred solution, a positioning hole is provided on the top of the body, so that the body can be easily assembled and positioned.

[0008] As a preferred embodiment, the water tank includes a rectangular tank body and a V-shaped tank body which are interconnected. The rectangular tank body is located on the upper side of the V-shaped tank body. The aforementioned sealing ribs are convexly arranged on the outer side of the V-shaped tank body. The rectangular tank body is convenient for the assembly of the main body. The V-shaped tank body can effectively increase the water pressure at the bottom and ensure that the sealing ribs are in close contact with the inner wall surface of the pump body.

[0009] As a preferred solution, a positioning rib is convexly provided on the outer side surface of the body, the positioning rib and the sealing rib are arranged vertically and spaced apart, and the positioning rib has a positioning convex point.

[0010] As a preferred solution, a recess is provided between the sealing rib and the positioning rib, and the recess can be used to receive grease to reduce friction.

[0011] As a preferred solution, an annular groove is provided at the bottom of the main body, and the annular groove is located at the periphery of the mounting cavity. The aforementioned positioning rib is protruding from the outer side surface of the annular groove. The design of the arc groove can reduce the mass of the main body and provide a certain deformation space for the positioning rib. At the same time, it can also accommodate grease to reduce the friction of the positioning rib.

[0012] Compared with the prior art, the utility model has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical solution that:

[0013] A water groove is provided on the top of the main body, a sealing rib is convexly provided on the outer side of the water groove, and a sealing convex point is provided on the sealing rib. The sealing convex point is in close contact with the inner wall surface of the pump body. The point contact method reduces the friction between the sealing convex point and the inner wall surface of the pump body, and can also achieve close contact with the inner wall surface of the pump body, thereby ensuring the sealing of the piston pump. In addition, the water pressure in the water groove provides an outward pressure to the sealing convex point, thereby further ensuring the sealing of the piston pump.

[0014] In order to more clearly illustrate the structural features and functions of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic diagram of a preferred embodiment of the utility model;

[0016] Figure 2 It is a three-dimensional schematic diagram of another angle of a preferred embodiment of the utility model;

[0017] Figure 3 It is a cross-sectional view of a preferred embodiment of the utility model;

[0018] Figure 4 It is a cross-sectional view of the assembly and use of the preferred embodiment of the utility model.

[0019] Description of the accompanying drawings:

[0020] 10. Body 11. Sink

[0021] 111, rectangular trough 112, V-shaped trough

[0022] 12. Sealing rib 121. Sealing convex point

[0023] 13. Installation cavity 14. Positioning hole

[0024] 15. Positioning ribs 151. Positioning convex points

[0025] 16. Concave position 17. Annular groove. DETAILED DESCRIPTION

[0026] Please refer to Figures 1 to 4 As shown, it shows the specific structure of the preferred embodiment of the utility model, including a body.

[0027] The main body 10 has a water trough 11 at the top, and a sealing rib 12 is convexly arranged on the outer side of the water trough 11. The sealing rib 12 has a sealing convex point 121. The main body 10 has a mounting cavity 13 for mounting with a piston rod at the bottom. In this embodiment, a positioning hole 14 is arranged at the top of the main body 10, so that the main body 10 is easy to assemble and position. The water trough 11 includes a rectangular trough body 111 and a V-shaped trough body 112 that are interconnected. The rectangular trough body 111 is located on the upper side of the V-shaped trough body 112. The aforementioned sealing rib 12 is convexly arranged on the outer side of the V-shaped trough body 112. The rectangular trough body 111 is easy to assemble the main body 10. The V-shaped trough body 112 can effectively increase the water pressure at the bottom to ensure that the sealing convex point 121 is in close contact with the inner wall of the pump body. In addition, a positioning rib 15 is convexly arranged on the outer side of the main body 10. The positioning rib 15 is convexly arranged on the inner side of the pump body. 15 and the sealing rib 12 are arranged at intervals in the upper and lower parts, and the positioning rib 15 has a positioning convex point 151; a recess 16 is provided between the sealing rib 12 and the positioning rib 15, and the recess 16 can be used to receive grease to reduce friction; and, an annular groove 17 is provided at the bottom of the main body 10, and the annular groove 17 is located at the periphery of the mounting cavity 13, and the aforementioned positioning rib 15 is convexly provided on the outer side surface of the annular groove 17. The design of the arc groove 17 can reduce the mass of the main body 10 and provide a certain deformation space for the positioning rib 15, and at the same time, grease can also be received to reduce the friction of the positioning convex point 151.

[0028] The design focus of the utility model is that a water tank is provided on the top of the main body, a sealing rib is convexly provided on the outer side of the water tank, and a sealing convex point is provided on the sealing rib. The sealing convex point is in close contact with the inner wall surface of the pump body. The point contact method makes the friction between the sealing convex point and the inner wall surface of the pump body smaller, and can also achieve close contact with the inner wall surface of the pump body, thereby ensuring the sealing performance of the piston pump. In addition, the water pressure in the water tank provides an outward pressure to the sealing convex point, thereby further ensuring the sealing performance of the piston pump.

[0029] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A piston structure, Features: The utility model comprises a main body; a water tank is arranged on the top of the main body, a sealing rib is convexly arranged on the outer side of the water tank, the sealing rib has a sealing convex point, and a mounting cavity for mounting with a piston rod is arranged on the bottom of the main body.

2. The piston structure according to claim 1, Features: A positioning hole is provided on the top of the body.

3. The piston structure according to claim 1, Features: The water tank comprises a rectangular tank body and a V-shaped tank body which are interconnected. The rectangular tank body is located on the upper side of the V-shaped tank body, and the sealing rib is convexly arranged on the outer side surface of the V-shaped tank body.

4. The piston structure according to claim 1, Features: A positioning rib is convexly arranged on the outer side surface of the body. The positioning rib and the sealing rib are arranged vertically and spaced apart. The positioning rib has a positioning convex point.

5. The piston structure according to claim 4, Features: A recess is provided between the sealing convex rib and the positioning convex rib.

6. The piston structure according to claim 5, Features: An annular groove is provided at the bottom of the body, and the annular groove is located at the periphery of the installation cavity. The aforementioned positioning rib is convexly arranged on the outer side surface of the annular groove.

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