Double-welded volute

Abstract

The utility model relates to the technical field of electronic water pumps, in particular to a double-welded volute which is simple in process, capable of preventing leakage caused by integral injection molding, low in cost and capable of reducing cost and process difficulty. Comprising a volute, a stator and a plastic-coated assembly, the stator is located in the plastic-coated assembly, welding ribs are arranged at the bottom of the volute, and the volute is matched with the plastic-coated assembly to prevent leakage.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic water pumps, in particular to a double-pass welded volute. Background Art

[0002] An electronic water pump utilizes piezoelectric materials as its power source, achieving complete electronicization from control to drive. Liquid delivery is fully controlled by an integrated electronic system, resulting in adjustable and precise liquid delivery. For example, prior art publication CN210518026U proposes an electronic water pump comprising a housing, a stator assembly, a circuit board, and a connector disposed within the housing. The circuit board has a ground terminal, and the connector has a first and a second connection terminal, the first connecting terminal connected to the stator assembly, and the second connecting terminal connected to the ground terminal of the circuit board. The connector also includes a resiliently curved section. To simplify assembly processes, electronic water pumps are increasingly adopting a single-piece overmolding method for the stator. However, due to positioning issues, this method is divided into primary and secondary overmolding. Double overmolding introduces a new issue: a weld line between the two coats of plastic is inevitable, and the location of this weld line can lead to internal and external leakage. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a double-pass welded volute with simple process, which can prevent the problem of integral injection molding leakage, low cost, and reduced cost and process difficulty.

[0004] The utility model discloses a double-pass welded volute, comprising a volute, a stator and a plastic-coated component. The stator is located in the plastic-coated component. Welding ribs are provided at the bottom of the volute. The volute cooperates with the plastic-coated component to prevent leakage. The welding ribs are provided on the volute to prevent leakage. The process is simple. Only one welding is required to prevent the problem of integral injection molding leakage, thereby reducing costs and process difficulty.

[0005] Preferably, the overmolding assembly includes a stator secondary overmolding and a stator primary overmolding, the stator is located between the stator secondary overmolding and the stator primary overmolding, and there is a joining line between the stator secondary overmolding and the stator primary overmolding; the stator is sealed by the stator secondary overmolding and the stator primary overmolding, and cooperates with the volute to prevent leakage.

[0006] Preferably, there are two welding ribs; one to prevent internal leakage and the other to prevent external leakage. After welding, the internal coolant can be prevented from leaking into the stator, and water vapor in the outside air can be prevented from entering the stator to corrode the stator.

[0007] Preferably, a fixing ear is provided on the outer wall of the stator which is once overmolded, and a circular hole is provided on the fixing ear.

[0008] Compared with the prior art, the beneficial effects of the present invention are: welding ribs are provided on the volute to prevent leakage, the process is simple, and only one welding is required to prevent the problem of integral injection molding leakage, thereby reducing costs and process difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural diagram of the utility model;

[0010] Figure 2 It is a front structural schematic diagram of the utility model;

[0011] Figure 3 It is a front cross-sectional structural schematic diagram of the utility model;

[0012] Figure 4 It is a structural diagram of the volute of the utility model;

[0013] Markings in the attached figure: 1, volute; 2, stator secondary plastic coating; 3, stator primary plastic coating; 4, stator; 5, joining line. DETAILED DESCRIPTION

[0014] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be provided below with reference to the accompanying drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present invention.

[0015] like Figures 1 to 4 As shown, the stator 4 is located between the stator secondary plastic coating 2 and the stator primary plastic coating 3. There is a joint line 5 between the stator secondary plastic coating 2 and the stator primary plastic coating 3. The bottom of the volute 1 is provided with two welding ribs. The outer wall of the stator primary plastic coating 3 is provided with a fixing ear, and the fixing ear is provided with a circular hole.

[0016] The stator 4 is sealed by stator secondary plastic wrapping 2 and stator primary plastic wrapping 3, and cooperates with the volute 1 to prevent leakage. Two welding ribs prevent internal leakage and external leakage respectively. After welding, it can prevent the internal coolant from leaking into the stator, and can also prevent water vapor in the outside air from entering the stator and corroding the stator.

[0017] like Figures 1 to 4 As shown, the utility model has a double-pass welded volute. When it is working, the pressure inside the water pump and the coolant will leak into the stator from the inner joint line position, and the water vapor in the outside air will also leak into the stator from the outer joint line position. Because the stator is composed of silicon steel sheets and copper wires and is extremely susceptible to corrosion, two welding ribs are designed on the volute 1. After welding, it can prevent the internal coolant from leaking into the stator, and can also prevent the water vapor in the outside air from entering the stator and corroding the stator.

[0018] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A double-pass welded volute, characterized in that: The invention comprises a volute (1), a stator (4) and a plastic-coating assembly, wherein the stator (4) is located in the plastic-coating assembly, a welding rib is provided at the bottom of the volute (1), and the volute (1) cooperates with the plastic-coating assembly to prevent leakage; the plastic-coating assembly comprises a stator secondary plastic-coating (2) and a stator primary plastic-coating (3), the stator (4) is located between the stator secondary plastic-coating (2) and the stator primary plastic-coating (3), and a joining line (5) is provided between the stator secondary plastic-coating (2) and the stator primary plastic-coating (3).

2. A double-pass welded volute according to claim 1, characterized in that: There are two welding ribs.

3. A double-pass welded volute according to claim 1, characterized in that: The outer wall of the stator primary plastic coating (3) is provided with a fixing ear, and the fixing ear is provided with a circular hole.

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