Water pump structure capable of realizing water and electricity separation

Abstract

This utility model discloses a water pump structure capable of separating water and electricity, including a pump casing, an impeller, a drive assembly, and a transmission shaft. The pump casing has an internal pump chamber; the impeller is disposed within the pump chamber; the drive assembly includes a motor bracket and a drive motor mounted on the motor bracket; one end of the transmission shaft extends into the pump chamber and connects to the impeller, and the other end extends into the motor bracket and is drively connected to the power output shaft of the drive motor; it also includes a coupling made of insulating material, through which the other end of the transmission shaft and the power output shaft of the drive motor are connected. Therefore, using an insulating coupling as the connection hub between the drive motor's power output shaft and the transmission shaft ensures that the drive motor has no contact with the liquid inside the pump casing, fundamentally eliminating the risk of leakage. It eliminates the need for complex isolation circuits on the power circuit board, reducing circuit complexity and cost, while improving reliability.

Description

Technical Field

[0001] This utility model relates to the field of water pump technology, and in particular to a water pump structure that can achieve water-electricity separation. Background Technology

[0002] To achieve automatic water dispensing, commercially available thermos flasks typically have a water pump at the bottom. This pump is a centrifugal pump, comprising a pump casing, an impeller, and a drive motor. The pump casing contains a pump chamber, within which the impeller rotates. The pump casing also has an integrally formed inlet and outlet that connect to the pump chamber. Thus, under the action of the drive motor, the impeller rotates, creating a negative pressure within the pump chamber. Water from the thermos flask's inner liner enters the pump chamber through the inlet, while the centrifugal force of the impeller discharges the water from the pump chamber through the outlet.

[0003] In this design, the power output shaft of the drive motor typically extends directly into the pump chamber and is connected to the impeller drive. Since the power output shaft is in direct contact with the water inside the pump chamber, an isolation circuit (such as an optocoupler or isolation transformer) needs to be added to the power circuit board to prevent electric shock or equipment damage from motor leakage. This not only increases the complexity of the power board circuit design and raises costs, but also results in lower reliability. Utility Model Content

[0004] To overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a water pump structure that can realize water-electricity separation. It uses an insulated coupling as the connection hub between the drive motor power output shaft and the transmission shaft, ensuring that the drive motor has no contact with the liquid inside the pump casing, thereby fundamentally eliminating the risk of leakage. This eliminates the need to add complex isolation circuits to the power circuit board, reducing the complexity and cost of the circuit, while improving reliability.

[0005] The objective of this utility model is achieved through the following technical solution: A water pump structure capable of separating water and electricity includes: Pump casing, with a pump chamber inside; An impeller is disposed within the pump chamber; A drive assembly, comprising a motor bracket and a drive motor mounted on the motor bracket; A drive shaft, one end of which extends into the pump chamber and is connected to the impeller, and the other end of which extends into the motor bracket and is connected to the power output shaft of the drive motor. It also includes a coupling made of insulating material, through which the other end of the drive shaft and the power output shaft of the drive motor are connected for transmission.

[0006] As an optional implementation, the coupling is a bushing, with one end of the bushing fitted onto the other end of the transmission shaft and the other end of the bushing fitted onto the power output shaft of the drive motor.

[0007] As an alternative implementation, the bushing is made of plastic or ceramic material.

[0008] As an optional implementation, it also includes an oil seal fitted on the drive shaft, the oil seal being located between the pump housing and the motor bracket and forming a waterproof seal.

[0009] As an optional implementation, the oil seal includes an oil seal body, wherein: The oil seal body has a through hole in the middle for fitting onto the drive shaft. The through hole of the oil seal body is provided with a first oil seal lip and a second oil seal lip arranged at an upper and lower interval. Both the first oil seal lip and the second oil seal lip abut against the outer wall of the drive shaft to achieve a waterproof seal. The top wall of the oil seal body abuts against the pump housing to achieve a waterproof seal, and the bottom wall of the oil seal body abuts against the motor bracket to achieve a waterproof seal.

[0010] As an optional implementation, the bottom of the pump housing is provided with a first convex ring to form a first groove with a bottom opening, and the top wall of the oil seal body is provided with a convex rib, which abuts against the top wall of the first groove to achieve a waterproof seal.

[0011] As an optional implementation, the bottom wall edge of the oil seal body is provided with a second convex ring to form a second groove with a bottom opening, and the middle part of the motor bracket is provided with an installation step. The oil seal body is fitted onto the installation step through the second groove to achieve a waterproof seal.

[0012] As an optional implementation, the pump casing includes an upper casing and a lower casing, the upper casing and the lower casing are connected to each other and enclose each other to form the pump cavity; the upper casing has a water inlet port communicating with the pump cavity, and the lower casing has a water outlet port communicating with the pump cavity.

[0013] As an optional implementation, a sealing ring is also included, which is located at the connection between the upper housing and the lower housing to achieve a waterproof seal.

[0014] As an optional implementation, the upper housing, the lower housing, the impeller, and the drive shaft are all made of food-grade plastic or stainless steel.

[0015] In summary, this utility model has the following technical effects: This utility model enables a water pump structure that separates water and electricity. It uses an insulated coupling as the connection hub between the drive motor's power output shaft and the transmission shaft, ensuring that the drive motor has no contact with the liquid inside the pump casing. This fundamentally eliminates the risk of leakage and eliminates the need to add complex isolation circuits to the power circuit board, reducing circuit complexity and cost while improving reliability. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the water pump structure of this utility model; Figure 2 This is an exploded view of the water pump structure of this utility model; Figure 3 This is a schematic diagram of the oil seal structure in the water pump of this utility model; Figure 4 for Figure 3 A structural diagram from another perspective; Figure 5 This is a schematic diagram of the lower housing in the water pump structure of this utility model; Figure 6 This is a cross-sectional schematic diagram of the water pump structure of this utility model.

[0018] The meanings of the reference numerals in the attached figures are as follows: 1. Pump casing; 11. Upper casing; 111. Inlet port; 12. Lower casing; 121. Outlet port; 122. First convex ring; 1221. First groove; 13. Pump chamber; 2. Impeller; 3. Drive assembly; 31. Motor bracket; 311. Mounting step; 32. Drive motor; 321. Power output shaft; 4. Transmission shaft; 5. Coupling; 6. Oil seal; 61. Oil seal body; 611. Rib; 612. Second convex ring; 613. Second groove; 62. First oil seal lip; 63. Second oil seal lip; 7. Sealing ring. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0021] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0022] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0023] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0024] The technical solution of this utility model will be further described below with reference to the embodiments and accompanying drawings.

[0025] See Figures 1 to 6 This application provides a water pump structure capable of separating water and electricity, including a pump casing 1, an impeller 2, and a drive assembly 3. The pump casing 1 has a pump chamber 13 inside; the impeller 2 is disposed inside the pump chamber 13; the drive assembly 3 includes a motor bracket 31 mounted on the pump casing 1 and a drive motor 32 mounted on the motor bracket 31; additionally, it includes a drive shaft 4 and a coupling 5. One end of the drive shaft 4 extends into the pump chamber 13 and is connected to the impeller 2, and the other end extends into the motor bracket 31 and is connected to the power output shaft 321 of the drive motor 32 via the coupling 5. Preferably, the coupling 5 is made of insulating material.

[0026] Therefore, under the action of the drive motor 32, it can drive the power output shaft 321 to rotate, and then drive the transmission shaft 4 to rotate through the coupling 5, and finally drive the impeller 2 to rotate to realize the water pumping function.

[0027] The use of an insulated coupling 5 as the connection hub between the power output shaft 321 of the drive motor 32 and the transmission shaft 4 ensures that the drive motor 32 has no contact with the liquid inside the pump housing 1, thus fundamentally eliminating the risk of leakage. This eliminates the need for complex isolation circuits on the power circuit board, reducing circuit complexity and cost. Furthermore, this physical isolation through mechanical structure solves the problem at its most fundamental level, providing a more reliable and fundamental safety solution.

[0028] Specifically, the coupling 5 is a bushing. One end of the bushing is fitted onto the other end of the drive shaft 4 to achieve a transmission connection, and the other end of the bushing is fitted onto the power output shaft 321 of the drive motor 32 to achieve a transmission connection. Preferably, the bushing is made of plastic.

[0029] It should be noted that in other embodiments, the bushing can also be made of other insulating materials such as ceramic materials, which can achieve the same effect, and there is no limitation on it here.

[0030] See also Figure 3-4 as well as Figure 6 The pump structure also includes an oil seal 6 fitted onto the drive shaft 4. The oil seal 6 is located between the pump housing 1 and the motor bracket 31 and forms a waterproof seal. The oil seal 6 includes an oil seal body 61, with a through hole in the middle for fitting onto the drive shaft 4. A first oil seal lip 62 and a second oil seal lip 63, arranged at intervals, are circumferentially around the through hole of the oil seal body 61. Both the first oil seal lip 62 and the second oil seal lip 63 abut against the outer wall of the drive shaft 4 to achieve a waterproof seal. The top wall of the oil seal body 61 abuts against the pump housing 1 to achieve a waterproof seal, and the bottom wall of the oil seal body 61 abuts against the motor bracket 31 to achieve a waterproof seal.

[0031] More specifically, the bottom of the pump housing 1 is provided with a first protruding ring 122 to form a first groove 1221 with a bottom opening, and the top wall of the oil seal body 61 is provided with a protruding rib 611, which abuts against the top wall of the first groove 1221 to achieve a waterproof seal; in addition, the bottom edge of the oil seal body 61 is provided with a second protruding ring 612 to form a second groove 613 with a bottom opening, and the middle part of the motor bracket 31 is provided with an installation step 311, and the oil seal body 61 is fitted onto the installation step 311 through the second groove 613 to achieve a waterproof seal.

[0032] Therefore, by setting the oil seal 6, it is possible to prevent the liquid in the pump chamber 13 from entering the drive assembly 3, thereby achieving water circuit isolation.

[0033] See also Figure 2 as well as Figure 6 The pump casing 1 includes an upper casing 11 and a lower casing 12, which are interconnected and enclose a pump cavity 13. An inlet port 111 communicating with the pump cavity 13 is integrally formed on the upper casing 11, and an outlet port 121 communicating with the pump cavity 13 is integrally formed on the lower casing 12. Thus, when the impeller 2 rotates, external liquid can enter the pump cavity 13 through the inlet port 121 and then be discharged through the outlet port 121.

[0034] In addition, a sealing ring 7 is included, which is located at the connection between the upper housing 11 and the lower housing 12 and abuts against the upper housing 11 and the lower housing 12 respectively to achieve a waterproof seal.

[0035] Preferably, the upper housing 11, lower housing 12, impeller 2 and drive shaft 4 are all made of food-grade plastic or stainless steel, that is, all parts in contact with the liquid are made of food-grade materials, thereby ensuring the hygiene and cleanliness of the liquid.

[0036] In summary, this utility model has the following technical effects: This utility model enables a water pump structure that separates water and electricity. It uses an insulated coupling 5 as the connection hub between the power output shaft 321 of the drive motor 32 and the transmission shaft 4, ensuring that the drive motor 32 has no contact with the liquid inside the pump casing 1, thereby fundamentally eliminating the risk of leakage. This eliminates the need to add complex isolation circuits to the power circuit board, reducing the complexity and cost of the circuit, while improving reliability.

[0037] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A water pump structure capable of separating water and electricity, characterized in that, include: Pump casing, with a pump chamber inside; An impeller is disposed within the pump chamber; A drive assembly, comprising a motor bracket and a drive motor mounted on the motor bracket; A drive shaft, one end of which extends into the pump chamber and is connected to the impeller, and the other end of which extends into the motor bracket and is connected to the power output shaft of the drive motor. It also includes a coupling made of insulating material, through which the other end of the drive shaft and the power output shaft of the drive motor are connected for transmission.

2. The water pump structure according to claim 1, characterized in that: The coupling is a bushing, one end of which is fitted onto the other end of the transmission shaft, and the other end of which is fitted onto the power output shaft of the drive motor.

3. The water pump structure according to claim 2, characterized in that: The bushing is made of plastic or ceramic material.

4. The water pump structure according to any one of claims 1-3, characterized in that: It also includes an oil seal fitted on the drive shaft, the oil seal being located between the pump housing and the motor bracket and forming a waterproof seal.

5. The water pump structure according to claim 4, characterized in that: The oil seal includes an oil seal body, wherein: The oil seal body has a through hole in the middle for fitting onto the drive shaft. The through hole of the oil seal body is provided with a first oil seal lip and a second oil seal lip arranged at an upper and lower interval. Both the first oil seal lip and the second oil seal lip abut against the outer wall of the drive shaft to achieve a waterproof seal. The top wall of the oil seal body abuts against the pump housing to achieve a waterproof seal, and the bottom wall of the oil seal body abuts against the motor bracket to achieve a waterproof seal.

6. The water pump structure according to claim 5, characterized by: The bottom of the pump casing is provided with a first convex ring to form a first groove with a bottom opening, and the top wall of the oil seal body is provided with a convex rib, which abuts against the top wall of the first groove to achieve a waterproof seal.

7. The water pump structure according to claim 5, characterized by: The bottom wall edge of the oil seal body is provided with a second protruding ring to form a second groove with a bottom opening. The middle part of the motor bracket is provided with an installation step. The oil seal body is fitted onto the installation step through the second groove to achieve waterproof sealing.

8. The water pump structure according to any one of claims 1-3, characterized in that: The pump casing includes an upper casing and a lower casing, the upper casing and the lower casing are connected to each other and enclose each other to form the pump cavity; the upper casing has a water inlet port communicating with the pump cavity, and the lower casing has a water outlet port communicating with the pump cavity.

9. The water pump structure according to claim 8, characterized in that: It also includes a sealing ring, which is located at the connection between the upper housing and the lower housing to achieve a waterproof seal.

10. The water pump structure according to claim 8, characterized by: The upper housing, the lower housing, the impeller, and the drive shaft are all made of food-grade plastic or stainless steel.

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