Miniature water pump motor

Abstract

The utility model discloses a miniature water pump motor which comprises a driving device, a pump body and a flexible piston disc, the pump body is fixedly arranged on the driving device, the pump body comprises a water outlet sealing cover, a pressure valve body and a base, the pressure valve body is arranged on the base in a covering mode, the water outlet sealing cover is arranged on the pressure valve body in a covering mode, and a valve diaphragm is arranged on the pressure valve body. A plurality of valve cavities communicated with the base are formed in the valve diaphragm, a water outlet valve opening communicated with the valve cavities is formed in the top face of the pressure valve body, a valve assembly is arranged on the water outlet valve opening, a water inlet communicated with the base is formed in the pressure valve body, a water outlet channel communicated with the water outlet valve opening is formed in the water outlet sealing cover, and the flexible piston disc is arranged in the pump body. An eccentric wheel is arranged on the driving device, and a shaft rod is fixedly arranged between the middle of the flexible piston disc and an eccentric hole of the eccentric wheel. Water inflow and water outflow are achieved in a piston mode, plastic deformation and abrasion of the valve diaphragm are avoided, and the service life of the diaphragm is effectively prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of micro motors, and particularly relates to a micro water pump motor. Background Art

[0002] In a diaphragm pump, by arranging a main diaphragm and an eccentric wheel inside a pump body, the two cooperate with each other to adjust the fluid in the pump body. The principle is to utilize the pressure difference between different chambers in the pump body and the outside air to perform the suction and discharge actions on the fluid. However, in the existing diaphragm pumps in the current art, the main diaphragm inside the diaphragm pump changes the pressure difference in the chamber in a pulling manner. Under long-term operation, the main diaphragm is inevitably forced to be pulled, resulting in plastic deformation and wear, greatly reducing the service life of the main diaphragm, and thus increasing the maintenance cost of the diaphragm pump. Summary of the Utility Model

[0003] The technical problem to be solved by the embodiments of the utility model is to provide a micro water pump motor, which realizes water inlet and water outlet in a piston manner, avoids plastic deformation and wear of the valve diaphragm, and effectively improves the service life of the diaphragm.

[0004] To achieve the above object, the utility model discloses a micro water pump motor, comprising:

[0005] A driving device, on which an eccentric wheel is fixedly arranged;

[0006] A pump body, which includes an outlet sealing cover, a pressure valve body and a base. The pressure valve body is covered on the base, the outlet sealing cover is covered on the pressure valve body, and an outlet pipe and an inlet pipe are respectively arranged on the outlet sealing cover;

[0007] A valve diaphragm is arranged on the pressure valve body, and a plurality of valve cavities communicating with the base are arranged on the valve diaphragm. An outlet valve port communicating with the valve cavity is arranged on the top surface of the pressure valve body, and a valve component is arranged on the outlet valve port. An inlet port communicating with the base and the inlet pipe is arranged on the pressure valve body, so that external liquid flows through the inlet pipe and the inlet port into the base. An outlet channel communicating with the outlet valve port and the outlet pipe is arranged on the outlet sealing cover, so that the liquid flows through the outlet valve port and the outlet channel and flows out from the outlet pipe;

[0008] A flexible piston disc, with several piston chambers communicating with the valve chamber provided at the bottom of the valve diaphragm. Several piston socket heads matching the piston chambers are provided on the flexible piston disc. A shaft rod is fixedly arranged between the middle of the flexible piston disc and the eccentric hole of the eccentric wheel, so that the driving device drives the eccentric wheel to drive the shaft rod to swing, linking the piston socket heads of the flexible piston disc to perform piston motion in the piston chambers, enabling liquid to enter the valve chamber under the negative pressure of the piston chambers. The liquid in the valve chamber pushes open the valve assembly under the extrusion of the piston socket heads and sprays out from the water outlet valve port through the water outlet channel.

[0009] Furthermore, the pressure valve body includes an upper valve body and a lower valve body, which are covered between the water outlet seal cover and the base. The upper valve body has a valve platform protruding upward, and the water outlet valve port is arranged on the valve platform. The surface of the lower valve body has a concave cavity matching the valve diaphragm, and several accommodation slot holes matching the valve chamber are provided on the concave cavity.

[0010] Furthermore, the valve assembly includes a valve head and a valve rod. A jack communicating with the valve chamber is opened at the center of the valve platform. The valve head is arranged on the valve rod, and the valve rod is slidably inserted into the jack. Under the negative pressure of the valve chamber, the valve head abuts against the top surface of the valve platform to close the water outlet valve port.

[0011] Furthermore, a limiting hole is provided at the lower part of the jack, and the inner diameter of the limiting hole is larger than that of the jack, so that a limiting step surface is formed between the limiting hole and the jack. A limiting part is provided in the middle of the valve rod, so that the limiting part is in stop cooperation with the limiting step surface.

[0012] Furthermore, a diversion hole communicating with the base is provided on the piston socket head.

[0013] Furthermore, the bottom surface of the valve chamber has a water inlet gap communicating with the piston chamber.

[0014] Furthermore, several sealing chambers are provided in the water outlet seal cover and cover the water outlet valve port. Chamber walls are provided between the sealing chambers, so that a water outlet channel is formed between the chamber walls, enabling the several sealing chambers to be connected through the water outlet channel. And a water outlet pipe communicating with the water outlet channel is provided on the water outlet seal cover.

[0015] Furthermore, a water inlet channel is formed between the sealing chamber, the chamber wall and the inner side surface of the water outlet seal cover. The water inlet is communicated with the water inlet channel, and a water inlet pipe communicating with the water inlet channel is provided on the water outlet seal cover.

[0016] Furthermore, the valve diaphragm, valve assembly, and flexible piston disc are made of silica gel material.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0018] (1) The present utility model adopts a piston method to achieve water inlet and outlet, avoiding plastic deformation and wear of the valve diaphragm caused by forced pulling during work, and effectively improving the service life of the diaphragm. (2) The water outlet cover and the upper valve body are respectively provided with independent water inlet channels and water outlet channels, thereby preventing liquid from permeating into the water inlet channel or liquid in the water inlet channel from entering the valve diaphragm through the water outlet valve port, so as to ensure the stability of the pump body's water outlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0020] Figure 2 is an exploded view of the overall structure of the present utility model;

[0021] Figure 3 is a top view of the overall structure of the present utility model;

[0022] Figure 4 shows Figure 3 a cross-sectional view taken along the A-A direction in

[0023] Figure 5 shows Figure 3 a cross-sectional view taken along the B-B direction in

[0024] Figure 6 shows Figure 4 a schematic diagram of the structure of part A in

[0025] Figure 7 is a schematic diagram of the structure of the upper valve body;

[0026] Figure 8 is a schematic diagram of the overall structure of the valve diaphragm;

[0027] Figure 9 is a schematic diagram of the overall structure of the lower valve body;

[0028] Figure 10 is a schematic diagram of the bottom surface structure of the water outlet cover. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] To make the objectives, technical solutions, and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0030] Refer to Figure 1 、 Figure 2As shown in the figure, a micro water pump motor includes a driving device 1, a pump body 2, and a flexible piston disc 3. The pump body 2 is fixedly arranged on the driving device 1, and the flexible piston disc 3 is arranged in the pump body 2. In this embodiment, the driving device 1 preferably adopts a motor, and an eccentric wheel 11 is fixedly arranged on its output shaft. A shaft rod is fixedly arranged between the middle part of the flexible piston disc 3 and the eccentric hole of the eccentric wheel 11.

[0031] The pump body 2 includes a water outlet seal cover 21, a pressure valve body 22, and a base 23. The pressure valve body 22 is covered on the base 23, and the water outlet seal cover 21 is covered on the pressure valve body 22. A valve diaphragm 24 is arranged on the pressure valve body 22. In this embodiment, the pressure valve body 22 includes an upper valve body 221 and a lower valve body 222. The lower valve body 222 is covered between the water outlet seal cover 21 and the base 23, and the valve diaphragm 24 is arranged between the upper valve body 221 and the lower valve body 222. In this embodiment, a plurality of connection holes are respectively arranged on the water outlet seal cover 21, the upper valve body 221, the lower valve body 222, and the base 23, and they are fixedly connected by screws.

[0032] Refer to Figure 2 , Figure 7 , Figure 10 As shown in the figure, in this embodiment, a water outlet pipe 211 and a water inlet pipe 212 are arranged on the water outlet seal cover 21, and a water outlet valve port 223 is arranged on the top surface of the pressure valve body 22. A plurality of sealing cavities 213 are arranged in the water outlet seal cover 21 and cover the water outlet valve port 223. The upper valve body 221 has a plurality of valve platforms 2211 protruding upward corresponding to the sealing cavities 213, and the water outlet valve port 223 is arranged on the valve platforms 2211. In this embodiment, the water outlet valve ports 223 are multiple and are arranged equidistantly along the circumferential direction. A cavity wall 214 is arranged between the sealing cavities 213 to form a water outlet channel 215 between the cavity walls 214, so that the plurality of sealing cavities 213 are connected through the water outlet channel 215, and the water outlet seal cover is communicated with the water outlet valve port 223 through the water outlet channel 215. A valve component 25 is arranged on the water outlet valve port 223 to control the closing or opening of the water outlet valve port 233.

[0033] An intake channel 216 is formed between the sealing cavity 213, the cavity wall 214 and the inner side surface of the water outlet seal cover 21. The pressure valve body 22 is provided with a water inlet 224 communicating with the base 23 and communicating with the intake channel 216, so that the liquid enters the intake channel 216 through the water inlet pipe 211. The water outlet seal cover 21 uses the sealing cavity 213 and the cavity wall 214 to separate the intake channel 216 from the water outlet channel 215, thereby preventing the liquid from permeating into the water outlet channel 215 or the intake channel 216, so as to ensure the stability of the water outlet of the pump body 2.

[0034] Refer to Figure 8 , Figure 9As shown in the figure, further, a number of valve cavities 241 communicating with the base 23 are provided on the valve diaphragm 24. The surface of the lower valve body 222 has a concave cavity 2221 matching the valve diaphragm 24, and a number of accommodating slot holes 2222 matching the valve cavities 241 are provided on the concave cavity 2221, so that the valve diaphragm 24 and the surface of the lower valve body 222 are on the same horizontal plane, enabling the upper valve body 221 and the lower valve body 222 to tightly press the valve diaphragm 24, avoiding leakage gaps between the valve diaphragm 24 and the surface of the lower valve body 222 and affecting the sealing performance of the pump body.

[0035] Referring to Figures 2 - 4 As shown in the figure, a number of piston cavities 242 communicating with the valve cavities 241 are provided at the bottom of the valve diaphragm 24. The bottom surface of the valve cavity 241 has a water inlet gap 243 communicating with the piston cavity 242. A number of piston socket heads 31 matching the piston cavities 242 are provided on the flexible piston disc 3, and a diversion hole 32 communicating with the base is provided on the piston socket head 31. By driving the device 1 to drive the eccentric wheel 11 to drive the shaft rod to swing, the piston socket head 31 of the flexible piston disc 3 is driven to move radially in the piston cavity 242, so that the liquid enters the valve cavity 241 under the negative pressure action of the piston cavity 242, and the liquid in the valve cavity 241 pushes open the valve assembly 25 under the extrusion of the piston socket head 31 and sprays out from the water outlet valve port 223 through the water outlet channel 215.

[0036] Referring to Figure 4 、 Figure 6 As shown in the figure, in this embodiment, the valve assembly 25 includes a valve head 251 and a valve rod 252. A jack 2212 communicating with the valve cavity 241 is provided at the center of the valve platform 2211. The valve head 251 is arranged on the valve rod 252, and the valve rod 252 is slidably inserted into the jack 2212. A limiting hole 2213 is provided at the lower part of the jack 2212, and the inner diameter of the limiting hole 2213 is larger than that of the jack 2212, so as to form a limiting step surface between the limiting hole 2213 and the jack 2212. A limiting portion 253 is provided in the middle of the valve rod 252, so that the limiting portion 253 is in stop fit with the limiting step surface to prevent the valve assembly 25 from being pushed out of the jack 2212.

[0037] It should be further noted that the valve diaphragm 24, the valve assembly 25, and the flexible piston disc 3 are made of silica gel material.

[0038] Referring to Figures 1 - 10 As shown in the figure, the specific working process is as follows:

[0039] Liquid enters the water inlet passage 216 through the water inlet pipe 212. The driving device 1 drives the plug rod to swing, so that a plurality of piston sleeves 31 make continuous piston movements in the radial direction in the piston chamber 242 driven by the flexible piston disc 3. When the piston sleeve 31 slides downward in the piston chamber 242, a negative pressure is generated in the valve chamber 241 of the valve diaphragm 24. The liquid in the water inlet passage 216 flows into the valve chamber 241 through the water inlet 224 under the action of the negative pressure in the valve chamber 241. And the valve head 251 abuts against the top surface of the valve platform 2211 under the action of the negative pressure to close the water outlet valve port 223. When the piston sleeve 31 slides upward in the piston chamber 242, the liquid in the valve chamber 241 will lift the valve head 251 under the action of pressure. The liquid enters the water outlet passage 215 through the water outlet valve port 223 and is sprayed out from the water outlet pipe 211. In this embodiment, the liquid is a disinfectant, so that the disinfectant is sprayed in the form of a spray.

[0040] Of course, the above embodiments are only for explaining the technical concept and characteristics of the present invention. The purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it accordingly, and it cannot be used to limit the protection scope of the present invention. All modifications made according to the spirit and essence of the main technical solution of the present invention should be covered within the protection scope of the present invention.

Claims

1. A micro water pump motor, characterized in that, Comprising: A driving device (1) with an eccentric wheel (11) fixedly arranged thereon; A pump body (2) including a water outlet seal cover (21), a pressure valve body (22), and a base (23). The pressure valve body (22) covers the base (23), the water outlet seal cover (21) covers the pressure valve body (22), and a water outlet pipe (211) and a water inlet pipe (212) are respectively arranged on the water outlet seal cover (21); A valve diaphragm (24) is arranged on the pressure valve body (22), and a number of valve cavities (241) communicating with the base (23) are arranged on the valve diaphragm (24). A water outlet valve port (223) communicating with the valve cavity (241) is arranged on the top surface of the pressure valve body (22), and a valve component (25) is arranged on the water outlet valve port (223). An inlet port (224) communicating with the base (23) and the water inlet pipe (212) is arranged on the pressure valve body (22) so that external liquid flows through the water inlet pipe (212) and the inlet port (224) into the base (23). A water outlet channel (215) communicating with the water outlet valve port (223) and the water outlet pipe (211) is arranged on the water outlet seal cover (21) so that liquid flows through the water outlet valve port (223) and the water outlet channel (215) and flows out from the water outlet pipe (211); A flexible piston disc (3). A number of piston cavities (242) communicating with the valve cavities (241) are arranged at the bottom of the valve diaphragm (24). A number of piston socket heads (31) matching the piston cavities (242) are arranged on the flexible piston disc (3). A shaft rod is fixedly arranged between the middle of the flexible piston disc (3) and the eccentric hole of the eccentric wheel (11) so that the driving device (1) drives the eccentric wheel (11) to drive the shaft rod to swing, thereby linking the piston socket heads (31) of the flexible piston disc (3) to perform a piston movement in the radial direction in the piston cavities (242), so that liquid enters the valve cavities (241) under the negative pressure action in the piston cavities (242), and the liquid in the valve cavities (241) pushes open the valve component (25) under the extrusion of the piston socket heads (31) and sprays out from the water outlet channel (215) through the water outlet valve port (223).

2. A micro water pump motor according to claim 1, characterized in that, The pressure valve body (22) includes an upper valve body (221) and a lower valve body (222). The upper valve body (221) and the lower valve body (222) cover between the water outlet seal cover (21) and the base (23). The upper valve body (221) has a valve platform (2211) protruding upward, and the water outlet valve port (223) is arranged on the valve platform (2211). The surface of the lower valve body (222) has a concave cavity (2221) matching the valve diaphragm (24), and a number of accommodation slot holes (2222) matching the valve cavities (241) are arranged on the concave cavity (2221).

3. A micro water pump motor according to claim 2, characterized in that, The valve assembly (25) includes a valve head (251) and a valve stem (252). A jack (2212) communicating with the valve cavity (241) is provided at the center of the valve platform (2211). The valve head (251) is arranged on the valve stem (252), and the valve stem (252) is slidably inserted into the jack (2212). Under the negative pressure of the valve cavity (241), the valve head (251) abuts against the top surface of the valve platform (2211) to close the water outlet valve port (223).

4. A micro water pump motor according to claim 3, characterized in that, A limiting hole (2213) is provided at the lower part of the jack (2212). The inner diameter of the limiting hole (2213) is larger than that of the jack (2212), so as to form a limiting step surface between the limiting hole (2213) and the jack (2212). A limiting part (253) is provided in the middle of the valve stem (252), so that the limiting part (253) is in limiting fit with the limiting step surface.

5. A micro water pump motor according to claim 1, characterized in that, A diversion hole (32) communicating with the base (23) is provided on the piston socket (31).

6. A micro water pump motor according to claim 1, characterized in that, The bottom surface of the valve cavity (241) has a water inlet gap (243) communicating with the piston cavity (242).

7. A micro water pump motor according to claim 1, characterized in that, A plurality of sealing cavities (213) are arranged in the water outlet cover (21) and cover the water outlet valve port (223). A cavity wall (214) is arranged between the sealing cavities (213), so as to form a water outlet channel (215) between the cavity walls (214), so that the plurality of sealing cavities (213) are connected through the water outlet channel (215), and the water outlet channel (215) is connected with the water outlet pipe (211).

8. A micro water pump motor according to claim 7, characterized in that, An inlet channel (216) is formed between the sealing cavity (213), the cavity wall (214) and the inner side surface of the water outlet cover (21). The water inlet (224) is communicated with the inlet channel (216), and the inlet channel (216) is connected with the inlet pipe (212).

9. A micro water pump motor according to claim 1, characterized in that, The valve diaphragm (24), the valve assembly (25), and the flexible piston disc (3) are made of silica gel material.

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