A pumping mechanism and pet water fountain

Abstract

The utility model provides a kind of pumping mechanism and pet water dispenser, pumping mechanism includes outer shell, centrifugal impeller, motor support and motor module, the centrifugal impeller rotatably assembled in outer shell;The motor support is covered on the top opening of outer shell and has the rotor installation cavity of the containing cavity of the communication outer shell and the stator installation slot isolated with the containing cavity of outer shell, the stator part of the motor module is fixed in the stator installation slot of the motor support, and its rotor part rotatably assembled in the rotor installation cavity of motor support and connected with the centrifugal impeller;Realized the effect of pumping and water power isolation.

Description

Technical Field

[0001] This utility model relates to the field of water pumping equipment, specifically to a water pumping mechanism and a pet water fountain. Background Technology

[0002] As the number of pet owners grows, pet care accessories have emerged. Pet water fountains are mechanical devices with an active water refill function. Current pet water fountains typically have a water pump inside the water tank, which draws water from the tank to the drinking trough for refilling. However, because the power supply and signal control lines for the water pump are submerged in water, the wiring is prone to aging and leakage over time, posing a risk of electric shock to pets and endangering their safety and health. Utility Model Content

[0003] To address the aforementioned problems, this invention provides a water pumping mechanism and a pet water dispenser that effectively isolates water and electricity.

[0004] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0005] A water pumping mechanism includes a housing, a centrifugal impeller, a motor bracket, and a motor module. The housing has a receiving cavity and an inlet and an outlet communicating with the receiving cavity, with the outlet positioned higher than the inlet. The centrifugal impeller is rotatably mounted within the housing. The motor bracket covers the top opening of the housing and has a rotor mounting cavity communicating with the receiving cavity of the housing and a stator mounting slot isolated from the receiving cavity of the housing, the stator mounting slot being located on the periphery of the rotor mounting cavity. The motor module includes a stator portion and a rotor portion. The stator portion is fixed within the stator mounting slot of the motor bracket, and the rotor portion is rotatably mounted within the rotor mounting cavity of the motor bracket and connected to the centrifugal impeller. When the motor module is powered on, the rotation of the rotor portion drives the centrifugal impeller to rotate, thereby using the centrifugal force generated by the rotation to lift water entering the receiving cavity from the inlet of the housing to the outlet for discharge.

[0006] Furthermore, the rotor portion includes a shaft and a rotor core. The shaft has a first section extending into the rotor mounting cavity and a second section extending out of the rotor mounting cavity. The rotor core is fixed to the first section of the shaft, and the second section of the shaft is connected to the centrifugal impeller.

[0007] Furthermore, a positioning shaft is provided inside the rotor mounting cavity, and the rotor part is provided with a central hole. The rotor part is rotatably sleeved on the positioning shaft through the central hole, so that the rotor part can be rotatably assembled in the rotor mounting cavity of the motor bracket.

[0008] Furthermore, the positioning shaft is a ceramic shaft, and the positioning shaft is fixed on the motor bracket.

[0009] Furthermore, the centrifugal impeller is provided with a fixed shaft extending into the rotor mounting cavity, and the rotor part includes a rotor magnetic core, which is directly mounted on the fixed shaft of the centrifugal impeller.

[0010] Furthermore, the motor bracket has a recessed groove that is recessed towards the receiving cavity. The bottom center of the recessed groove has an upwardly arched columnar protrusion. The annular groove surrounding the columnar protrusion is the stator mounting groove, and the inner cavity of the columnar protrusion is the rotor mounting cavity.

[0011] Furthermore, both the outer casing and the centrifugal impeller have an inverted conical structure.

[0012] Furthermore, the outer casing and the centrifugal impeller have the same taper, and the distance between the outer edge of the centrifugal impeller and the conical inner wall of the outer casing is 2mm-5mm.

[0013] Furthermore, the cone angle between the outer casing and the centrifugal impeller is set between 10° and 20°.

[0014] A pet water fountain includes a water tank and a drinking trough disposed above the water tank. It also includes the aforementioned water pumping mechanism, which is mounted on the water tank. The inlet of the water pumping mechanism is connected to the water storage chamber of the water tank, and the outlet of the water pumping mechanism is connected to the drinking trough.

[0015] The technical solution provided by this utility model has the following beneficial effects:

[0016] The pumping mechanism used in this application uses a motor module to drive a centrifugal impeller to rotate, lifting water that enters the containment cavity through the inlet of the outer casing to the outlet to achieve the purpose of pumping water. At the same time, the stator and rotor of the motor module are isolated. The stator is external for power connection, and the rotor is internal for connecting to the centrifugal impeller, achieving water and electricity isolation. There are no gaps for water leakage, and no need for sealing accessories for water sealing. The structure is simple, safe and reliable. Attached Figure Description

[0017] Figure 1 The figure shown is a cross-sectional view of the pumping mechanism in the embodiment;

[0018] Figure 2 The diagram shown is an exploded view of the pumping mechanism in the embodiment.

[0019] Figure 3 The diagram shown is a schematic diagram of the connection structure between the centrifugal impeller and the rotor in the embodiment. Detailed Implementation

[0020] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention and are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0021] In the description of this utility model, terms such as "upper", "lower", "left", "right", "front", and "rear" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0023] Reference Figures 1 to 3 As shown, this embodiment provides a pumping mechanism including a housing 10, a centrifugal impeller 20, a motor bracket 30, and a motor module 40. The housing 10 has a receiving cavity 101 and an inlet 11 and an outlet 12 communicating with the receiving cavity 101. The outlet 12 is positioned higher than the inlet 11. The centrifugal impeller 20 is rotatably mounted inside the housing 10. In this embodiment, the inlet 11 is located at the bottom of the housing 10, and the outlet 12 is located on the side wall of the housing 10. The housing 10 also has a top opening. A bearing 13 is provided at the bottom of the housing 10, and the bottom of the centrifugal impeller 20 is connected to the inner ring of the bearing 13 via a connecting shaft 21, enabling rotatable mounting.

[0024] The motor bracket 30 covers the top opening of the outer casing 10 and has a rotor mounting cavity 32 that communicates with the receiving cavity 101 of the outer casing 10 and a stator mounting groove 31 that is isolated from the receiving cavity 101 of the outer casing 10. That is, the stator mounting groove 31 and the rotor mounting cavity 32 are completely isolated by the side wall of the motor bracket 30, and the stator mounting groove 31 is located on the periphery of the rotor mounting cavity 32. The rotor mounting cavity 32 communicates inward with the receiving cavity 101, and the stator mounting groove 31 is isolated outward from the receiving cavity 101.

[0025] The motor module 40 includes a stator portion 41 and a rotor portion 42. The stator portion 41 is a stator winding. The stator portion 41 is fixed in the stator mounting slot 31 of the motor bracket 30. The rotor portion 42 is rotatably mounted in the rotor mounting cavity 32 of the motor bracket 30 and connected to the centrifugal impeller 20. The stator portion 41 is used for external power supply. When the motor module 40 is powered on, the magnetic field generated by the stator portion 41 drives the rotor portion 42 to rotate. The rotation of the rotor portion 42 drives the centrifugal impeller 20 to rotate, and the centrifugal force generated by the rotation lifts the water that enters the receiving cavity 101 from the inlet 11 to the outlet 12 and flows out. The specific process is as follows: external water flows into the receiving cavity 101 from the inlet 11. When the centrifugal impeller 20 rotates in the receiving cavity 101, it will drive the water in the receiving cavity 101 to rotate together and generate centrifugal force. The water in the receiving cavity 101 will be lifted under the action of centrifugal force, and external water will continuously flow in. When the water in the receiving cavity 101 is lifted to the height of the outlet 12, the water begins to flow out from the outlet 12, thereby lifting the water in the receiving cavity 101 to the outlet 12 and flowing out.

[0026] The pumping mechanism used in this application uses a motor module 40 to drive a centrifugal impeller 20 to rotate, which lifts water entering the receiving cavity 101 from the inlet 11 of the outer casing 10 to the outlet 12 to achieve the purpose of pumping water. At the same time, the stator part 41 and the rotor part 42 of the motor module 40 are isolated. The stator part 41 is external for power connection, and the rotor part 42 is internal for connecting the centrifugal impeller 20, which achieves water and electricity isolation. There is no gap for water leakage, and there is no need to use sealing accessories for water sealing. The structure is simple, safe and reliable.

[0027] This embodiment also provides a pet water fountain, including a water tank and a drinking trough disposed above the water tank. Furthermore, it includes the aforementioned water pumping mechanism, which is mounted on the water tank. The inlet 11 of the pumping mechanism is connected to the water storage chamber of the water tank, and the outlet 12 of the pumping mechanism is connected to the drinking trough. That is, the pumping mechanism pumps water from the water tank into the drinking trough for the pet to drink.

[0028] Specifically, in this embodiment, the rotor cores 421 of the stator portion 41 and the rotor portion 42 are on the same layer in the radial direction. The actual rotor core 421 is located in the inner ring of the stator portion 41. When not in operation, the rotor portion 42 is held in place by the magnetic force applied by the stator portion 41. When cleaning is required, simply apply external force to pull the rotor portion 42 out of the rotor mounting cavity 32 for easy cleaning.

[0029] Furthermore, the specific structure of the stator mounting groove 31 and the rotor mounting cavity 32 is as follows: the motor bracket 30 has a recessed groove body that is recessed towards the receiving cavity 101, and the recessed groove body is a cylindrical groove body; the bottom center of the recessed groove body has an upwardly arched columnar protrusion 34, the annular groove body surrounding the columnar protrusion 34 is the stator mounting groove 31, and the inner cavity of the columnar protrusion 34 is the rotor mounting cavity 32.

[0030] Furthermore, to ensure stable and reliable rotation of the rotor portion 42 within the rotor mounting cavity 32, in this embodiment, a positioning shaft 33 is provided within the rotor mounting cavity 32. This positioning shaft 33 is fixed to the motor bracket 30. The positioning shaft 33 is non-magnetic and is specifically made of ceramic material. The rotor portion 42 is provided with a central hole 423. The rotor portion 42 is rotatably sleeved onto the positioning shaft 33 through the central hole 423, thereby achieving the positioning and installation of the rotor portion 42. This ensures that the rotor portion 42 always maintains a certain gap with the inner wall of the rotor mounting cavity 32, preventing wear.

[0031] In this embodiment, the rotor portion 42 includes a rotating shaft 422 and a rotor magnetic core 421. The rotating shaft 422 is made of a non-magnetic and insulating material such as plastic or ceramic. The rotating shaft 422 has a first section extending into the rotor mounting cavity 32 and a second section extending out of the rotor mounting cavity 32. The rotor magnetic core 421 is fixed to the first section of the rotating shaft 422, thereby cooperating with the stator portion 41. The second section of the rotating shaft 422 is connected to the centrifugal impeller 20 to achieve stable installation. Of course, other embodiments are not limited to this. For example, the structure of the rotating shaft 422 may not be used. That is, the centrifugal impeller 20 may be provided with a fixed shaft extending into the rotor mounting cavity 32. That is, the fixed shaft is integrally extended from the centrifugal impeller 20, and the rotor magnetic core 421 is fixed to the fixed shaft. In this way, the connection between the rotor portion 42 and the centrifugal impeller 20 can also be achieved.

[0032] Specifically, in order to better ensure that the water in the receiving cavity 101 can be quickly and stably lifted to the outlet by the centrifugal impeller 20, in this embodiment, both the outer shell 10 and the centrifugal impeller 20 are inverted conical structures, that is, the receiving cavity 101 is also an inverted conical cavity, so that the water can be lifted more easily.

[0033] More preferably, the outer casing 10 and the centrifugal impeller 20 have the same taper, so that the distance between the outer edge of the centrifugal impeller 20 and the conical inner wall of the outer casing 10 can be kept consistent, which is more conducive to water lifting; as preferably, the cone angle of the outer casing 10 and the centrifugal impeller 20 (referring to...) Figure 1The included angle α between the impeller and the vertical axis is set between 10° and 20°, ensuring that water can be lifted without occupying too much space in the water tank and guaranteeing the water storage capacity. Simultaneously, the distance L between the outer edge of the centrifugal impeller 20 and the conical inner wall of the outer casing 10 is 2mm-5mm. In summary, the rotating water is confined within this 2mm-5mm wide space, giving the centrifugal impeller 20 a certain squeezing effect on the water inside the outer casing 10, enabling faster water lifting. This ensures pumping efficiency without generating squeezing noise due to excessively small spacing. Of course, other embodiments are not limited to this. While ensuring that the rotation of the centrifugal impeller 20 can lift the water in the receiving cavity 101 to flow out from the outlet, the cone angle α and the distance L of the outer casing 10 and the centrifugal impeller 20 can be set according to actual conditions. Even the shapes of the outer casing 10 and the centrifugal impeller 20 can be set according to actual conditions.

[0034] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.

Claims

1. A pumping mechanism, characterized in that: It includes an outer casing, a centrifugal impeller, a motor bracket, and a motor module. The outer casing has a receiving cavity and an inlet and an outlet communicating with the receiving cavity. The outlet is positioned higher than the inlet. The centrifugal impeller is rotatably mounted inside the housing; the motor bracket covers the top opening of the housing and has a rotor mounting cavity communicating with the housing cavity of the housing and a stator mounting slot isolated from the housing cavity of the housing, the stator mounting slot being located on the periphery of the rotor mounting cavity; the motor module includes a stator part and a rotor part, the stator part being fixed in the stator mounting slot of the motor bracket, and the rotor part being rotatably mounted in the rotor mounting cavity of the motor bracket and connected to the centrifugal impeller; when the motor module is powered on, the rotation of the rotor part drives the centrifugal impeller to rotate, and the centrifugal force generated by the rotation lifts the water entering the housing cavity from the inlet of the housing to the outlet and out.

2. The pumping mechanism according to claim 1, characterized in that: The rotor portion includes a shaft and a rotor core. The shaft has a first section extending into the rotor mounting cavity and a second section extending out of the rotor mounting cavity. The rotor core is fixed to the first section of the shaft, and the second section of the shaft is connected to the centrifugal impeller.

3. The pumping mechanism according to claim 1 or 2, characterized in that: A positioning shaft is provided inside the rotor mounting cavity, and the rotor part is provided with a central hole. The rotor part is rotatably sleeved on the positioning shaft through the central hole, so that the rotor part can be rotatably assembled in the rotor mounting cavity of the motor bracket.

4. The pumping mechanism according to claim 3, characterized in that: The positioning shaft is a ceramic shaft, and the positioning shaft is fixed on the motor bracket.

5. The pumping mechanism according to claim 1, characterized in that: The centrifugal impeller is provided with a fixed shaft that extends into the rotor mounting cavity. The rotor part includes a rotor magnetic core, which is directly mounted on the fixed shaft of the centrifugal impeller.

6. The pumping mechanism according to claim 1, characterized in that: The motor bracket has a recessed groove that is recessed towards the receiving cavity. The bottom center of the recessed groove has an upwardly arched columnar protrusion. The annular groove surrounding the columnar protrusion is the stator mounting groove, and the inner cavity of the columnar protrusion is the rotor mounting cavity.

7. The pumping mechanism according to claim 1, characterized in that: Both the outer casing and the centrifugal impeller have an inverted conical structure.

8. The pumping mechanism according to claim 7, characterized in that: The outer casing and the centrifugal impeller have the same taper, and the distance between the outer edge of the centrifugal impeller and the conical inner wall of the outer casing is 2mm-5mm.

9. The pumping mechanism according to claim 8, characterized in that: The cone angle between the outer casing and the centrifugal impeller is set between 10° and 20°.

10. A pet water fountain, comprising a water tank and a drinking trough disposed above the water tank, characterized in that, It also includes a pumping mechanism as described in any one of claims 1 to 9, wherein the pumping mechanism is mounted on a water storage tank, the inlet of the pumping mechanism is connected to the water storage chamber of the water storage tank, and the outlet of the pumping mechanism is connected to the drinking trough.

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