Circulating water pump for dish washing machine

Abstract

A circulating water pump for a dish-washing machine comprises a pump body part and a motor part, the pump body part comprises a pump shell and an impeller arranged in the pump shell, a butt joint column and a butt joint seat are arranged at the end, facing the motor part, of a pump body, and the pump body is connected with the motor part through the butt joint column and the butt joint seat; the motor part comprises a front machine cover and a rear machine cover which are in butt joint with each other, the opposite surfaces of the front machine cover and the rear machine cover are concave inwards to form a stator cavity, a motor stator is mounted in the stator cavity, and a main shaft connected with a rotor penetrates through the front machine cover and the pump body to be connected with the impeller; a butt joint hole and a fixing base which are in butt joint with the butt joint column and the butt joint base respectively are arranged on the side, facing the pump body, of the front machine cover, and the pump body is fixed to the front machine cover. The utility model has the beneficial effects that the butt-joint column and the butt-joint seat are arranged at one end of the pump body facing the motor, and meanwhile, the butt-joint hole and the fixed seat are arranged at the corresponding positions of the front machine cover of the motor part. And during assembly, accurate guiding and positioning effects are achieved, and the centering process is simplified.

Description

Technical Field

[0001] This utility model relates to a dishwasher accessory, specifically a circulating water pump for a dishwasher. Background Technology

[0002] Dishwashers are widely used automated cleaning devices in modern homes and commercial kitchens. They use high-pressure jets of water to rinse dishes and achieve cleaning. The circulating water pump is the core power component of the dishwasher, responsible for drawing and pressurizing the washing water, and delivering it to the dishwasher cavity through the spray arms to effectively rinse the dishes.

[0003] A typical dishwasher water pump consists of a pump body and a motor. The pump body usually includes a pump casing and a built-in impeller to generate water flow; the motor provides the driving force, rotating the impeller via a main shaft. To ensure proper operation of the pump, the pump body and motor need to be precisely and securely connected.

[0004] However, existing dishwasher circulating water pumps often have the following drawbacks in their structural design, especially in the connection between the pump body and the motor:

[0005] 1. Traditional connection methods may rely on multiple scattered bolts and nuts or require additional connecting plates, brackets, or other intermediate components to fix the pump body and motor. This design not only increases the number of parts and management costs, but also makes the assembly process relatively cumbersome, requiring each part to be aligned and tightened one by one, resulting in low assembly efficiency and a tendency for omissions or inadequate tightening.

[0006] 2. Complex or non-integrated connection structures may loosen or shift at connection points under the vibration and load generated during long-term pump operation, affecting the coaxiality accuracy between the pump body and the motor. Coaxiality deviation will accelerate the wear of bearings and seals, generate noise, reduce pump efficiency, and even shorten the pump's service life.

[0007] 3. To achieve the connection, complex casting or machining operations may be required on the pump body or motor housing to create precise mating surfaces or threaded holes. Using additional connecting brackets further increases component costs and associated mold and processing costs.

[0008] 4. For motors that require a running capacitor, existing designs often treat the capacitor as a separate component, fixed to the outside of the water pump or other space in the dishwasher using additional clamps or brackets. This separate arrangement not only makes the overall structure less compact and occupies valuable internal space, but also increases the complexity and length of the capacitor wiring. It may also cause the capacitor to vibrate or be damaged during transportation or operation due to insecure fixing. Therefore, further improvements are necessary. Utility Model Content

[0009] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a dishwasher circulating water pump that is simple in structure, easy to use, more reliable in connection, easier to assemble, lower in cost, and more compact in layout.

[0010] The purpose of this utility model is achieved in the following way: a circulating water pump for a dishwasher, which includes a pump body and a motor, wherein the pump body includes a pump housing with an impeller built therein, and a docking post and a docking seat are provided at one end of the pump body facing the motor, and the pump body is connected to the motor through the docking post and the docking seat.

[0011] The motor part includes a front cover and a rear cover that are connected to each other. The opposite surfaces of the front cover and the rear cover are recessed to form a stator cavity. The motor stator is installed in the stator cavity, and the rotor is installed in the motor stator. The main shaft connected to the rotor passes through the front cover and the pump body and is connected to the impeller.

[0012] The front cover is provided with docking posts and docking seats on the side facing the pump body, with docking holes and fixing seats respectively connecting to fix the pump body on the front cover.

[0013] Furthermore: the docking post protrudes from the end of the pump body and has a cylindrical structure, which is integrally cast from the pump body material.

[0014] Furthermore: the docking seat is a boss extending outward from the cylindrical surface of the pump body. The boss has a recessed connecting hole facing the front cover. The fixing screw passes through the fixing seat set on the front cover and connects to the connecting hole.

[0015] Furthermore, the mounting base is formed by stamping the front hood body material outwards.

[0016] Furthermore, a capacitor base extends outward from the docking seat, and the running capacitor is fixedly installed on the capacitor base.

[0017] The beneficial effects of this utility model are: 1. Simple structure, low production cost, and improved market competitiveness.

[0018] 2. This utility model features a docking post and a docking seat at the end of the pump body facing the motor, and a docking hole and a fixing seat at the corresponding position on the front cover of the motor section. During assembly, the docking post on the pump body is directly inserted into the docking hole on the front cover, providing precise guidance and positioning, thus simplifying the alignment process.

[0019] 3. The docking seat on the pump body directly contacts and mates with the fixed seat on the front cover, forming a stable support surface. A secure connection is achieved by passing a fixing screw through the fixed seat and screwing it into the connection hole on the docking seat. This direct docking, easy positioning, and clearly defined fastening point design significantly simplifies the assembly process of the pump body and motor, eliminating the need for complex alignment operations or additional connecting brackets.

[0020] 4. The connecting column is integrally cast from the pump body material, and the fixed seat can be stamped outward from the front cover material. This integrated design reduces the number of parts, enhances the overall rigidity and stability of the connection structure, improves the reliability of the connection, and effectively avoids loosening problems caused by long-term operation vibration.

[0021] 5. This utility model ingeniously extends the capacitor holder integrally onto the docking seat of the pump body. This design provides a dedicated and stable mounting position for the operating capacitor, allowing it to be directly and conveniently fixed onto the capacitor holder. This greatly simplifies the capacitor installation process, eliminating the need to find additional space or use separate brackets or clamps to fix the capacitor as required by existing technologies. Attached Figure Description

[0022] Figure 1 , 2 This is a rendering of the final assembly of this utility model.

[0023] Figure 3 This is a cross-sectional view of the structure of this utility model.

[0024] Figure 4 , 5 This is an assembly drawing of the present utility model. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings. A circulating water pump for a dishwasher includes a pump body and a motor. The pump body includes a pump housing 1 with an impeller 2 built inside it. The end of the pump body facing the motor is provided with a docking post 3 and a docking seat 4. The pump body is connected to the motor through the docking post 3 and the docking seat 4. The motor includes a front cover 5 and a rear cover 6 that are docked to each other. The opposing surfaces of the front cover 5 and the rear cover 6 are recessed to form a stator cavity. The motor stator 7 is installed in the stator cavity. A rotor is installed in the motor stator 7. The main shaft 8 connected to the rotor passes through the front cover 5 and the pump body and is connected to the impeller 2. The side of the front cover 5 facing the pump body is provided with docking holes 9 and fixing seats 10 for docking of the docking post 3 and the docking seat 4, respectively, to fix the pump body on the front cover 5.

[0026] In this embodiment, the motor generates rotational power through the stator 7 and rotor, driving the main shaft 8 to rotate. The main shaft 8 passes through the front cover 5 of the motor and extends to the pump body, driving the impeller 2 inside the pump casing 1 to rotate, thereby pressurizing and circulating the water. The key structural connection lies in the fact that the pump body and the motor are fixed through a specific docking structure: the docking post 3 and docking seat designed at the end of the pump body serve as the male interface, precisely engaging with the two female interfaces, the docking hole 9 and the fixing seat 10, located on the front cover 5 of the motor. This male-female interface docking ensures the accurate positioning and stable connection of the pump body relative to the front cover of the motor, which is the foundation for the stable operation of the entire water pump as a whole.

[0027] The docking post 3 protrudes from the end of the pump body and has a cylindrical structure, integrally cast from the pump body material. In this embodiment, the docking post 3, as part of the pump body, physically protrudes outward from the pump body end face. Its cylindrical shape allows it to be smoothly inserted into the docking hole 9 on the front cover 5, playing a major positioning and guiding role, especially providing initial positioning in the radial and axial directions. Integral casting means that the post is not a later-added part, but rather forms an integral part with the pump body, typically the pump casing or a specific connecting flange, during manufacturing. Integral casting avoids the use of separate locating pins or posts, reducing the number of parts and potential weak points in the connection, resulting in high structural strength of the docking post itself and a secure connection with the pump body.

[0028] The protruding cylindrical structure provides clear insertion guidance, enabling workers to quickly and accurately align the pump body with the front cover of the motor during assembly, reducing assembly difficulty and improving assembly efficiency.

[0029] In one embodiment, the docking seat 4 is a boss extending outward from the cylindrical surface of the pump body. The boss has a recessed connecting hole 11 facing the front cover 5. The fixing screw passes through the fixing seat 10 provided on the front cover 5 and connects to the connecting hole 11.

[0030] The docking seat 4, as a boss extending from the side wall or end face of the pump body, provides a stable support surface for contacting the fixing seat 10 on the front cover 5. The docking seat 4 has a connecting hole. After the pump body and motor are aligned, the fixing screws for fastening first pass through the fixing seat 10 on the front cover 5 of the motor, and then are screwed into the connecting hole 11 on the docking seat 4 of the pump body. By tightening the screws, an axial tensile force is generated, tightly pressing the fixing seat 10 of the front cover 5 and the docking seat 4 of the pump body together, thereby achieving a final and secure axial fixation.

[0031] In one embodiment, the mounting base 10 is formed by outward stamping from the body material of the front hood 5.

[0032] In one embodiment, a capacitor base 12 extends outward from the docking seat 4, and the running capacitor 13 is fixedly mounted on the capacitor base 12. In this embodiment, a physical structure capacitor base 12 specifically designed for mounting the running capacitor 13 is further designed to extend from the docking seat 4 of the pump body, capable of accommodating and fixing the running capacitor 13. During installation, the running capacitor 13 is placed or fixed on this capacitor base 12.

[0033] Compared to traditional technologies, this design integrates the capacitor mounting location into the pump body connection structure's docking seat, making full use of the existing component space. It eliminates the need to find additional space within the dishwasher or use a separate bracket to install the capacitor, resulting in a more compact layout for the entire water pump and surrounding components. Furthermore, because the capacitor is close to the motor, the wiring distance between the capacitor and the motor can be shortened, simplifying the electrical connection.

[0034] In summary, the core working principle of the dishwasher circulating water pump designed in this utility model lies in achieving an efficient, precise, and stable connection between the pump body and the motor through a meticulously designed and integrated docking and fixing structure, while cleverly integrating the installation position of the running capacitor. Through the synergistic effect of the above structural features, this circulating water pump realizes the basic function of generating water flow by driving the impeller to rotate with the motor. Simultaneously, the structural optimization of the connection method between the pump body and the motor, as well as the layout of the capacitor, achieves a comprehensive effect of convenient and quick assembly, reliable and stable connection, compact structure, and reduced costs, thus making it widely applicable.

[0035] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of the claims of this utility model.

Claims

1. A circulating water pump for a dishwasher, characterized in that: It includes a pump body and a motor. The pump body includes a pump casing (1) with an impeller (2) inside it. The pump body is provided with a docking post (3) and a docking seat (4) at one end facing the motor. The pump body is connected to the motor through the docking post (3) and the docking seat (4). The motor part includes a front cover (5) and a rear cover (6) that are connected to each other. The opposite surfaces of the front cover (5) and the rear cover (6) are recessed to form a stator cavity. The motor stator (7) is installed in the stator cavity. The motor stator (7) is installed in the stator (7). The main shaft (8) connected to the rotor passes through the front cover (5) and the pump body and is connected to the impeller (2). The front cover (5) is provided with a docking post (3) and a docking seat (4) on the side facing the pump body, with docking holes (9) and fixing seats (10) respectively connecting to each other, so as to fix the pump body on the front cover (5).

2. A circulating water pump for a dishwasher according to claim 1, characterized in that: The docking post (3) protrudes from the end of the pump body and has a cylindrical structure. It is integrally cast from the pump body material.

3. A circulating water pump for a dishwasher according to claim 1, characterized in that: The docking seat (4) is a boss extending outward from the cylindrical surface of the pump body. The boss has a recessed connecting hole (11) facing the front cover (5). The fixing screw passes through the fixing seat (10) set on the front cover (5) and connects to the connecting hole (11).

4. A circulating water pump for a dishwasher according to claim 3, characterized in that: The mounting base (10) is formed by outward stamping from the body material of the front hood (5).

5. A circulating water pump for a dishwasher according to claim 3, characterized in that: A capacitor base (12) extends outward from the docking seat (4), and the running capacitor (13) is fixedly installed on the capacitor base (12).

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