Motor grounding terminal structure

Abstract

The utility model relates to the technical field of electronic water pumps, in particular to a motor grounding terminal structure, which can discharge charges on a pcba through a casing by arranging a grounding terminal, and can obtain a better shielding effect when a circuit uses a shielding cover or a shielding body of the circuit. Comprising pcba; the grounding terminal is welded on the pcba and is convenient for leading out charges of the pcba, and the aluminum cover is connected with the grounding terminal and is used for leading the charges of the grounding terminal into the ground.

Description

Technical Field

[0001] This utility model relates to the technical field of electronic water pumps, and in particular to a structure for a motor grounding terminal. Background Technology

[0002] Existing electronic water pumps are usually integrated water pumps, that is, the PCBA is installed inside the water pump. The PCBA needs to be grounded to the outside, usually the chassis is grounded. The PCBA needs to be connected to the chassis ground. Grounding the PCBA has two advantages: grounding can give all the unit circuits in our circuit system a common reference zero potential, that is, there is no potential difference between the circuits, ensuring that the circuit system can work stably, and it can prevent external electromagnetic interference.

[0003] Existing motor grounding terminal structures, such as the grounding structure of a motor connector disclosed in utility model patent application number 202321457172.2, mainly include a base fixedly mounted on the motor housing and a grounding terminal fixedly mounted on the base. The bottom end face of the base includes an installation area and a contact area located outside the installation area. The base is provided with a socket corresponding to the installation area. The grounding terminal includes a grounding pin arranged in a bent manner and a grounding spring. The grounding spring has a "T" shaped structure and includes a horizontal part located in the contact area and a vertical part connecting the horizontal part and the grounding pin. In use, the grounding pin of the grounding terminal is connected to an external cable and the grounding spring of the grounding terminal is clamped between the bottom of the base and the motor housing to achieve grounding protection of the motor. The "T" shaped structure of the grounding spring effectively ensures the contact area between the grounding spring and the motor housing and multi-point redundant elastic contact conduction.

[0004] However, chassis grounding provides a discharge path for transient interference and allows a large amount of charge accumulated on the chassis due to electrostatic induction to be discharged through the ground. If the circuit uses a shield or circuit shield, choosing a suitable grounding can achieve a better shielding effect. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a motor grounding terminal structure that can discharge the charge on the PCBA through the housing by setting a grounding terminal, and can obtain a better shielding effect when the circuit uses a shielding cover or circuit shielding body.

[0006] This utility model discloses a motor grounding terminal structure, including a PCBA; it also includes a grounding terminal and an aluminum cover. The grounding terminal is welded to the PCBA to facilitate the discharge of the PCBA's charge. The aluminum cover is connected to the grounding terminal and conducts the charge of the grounding terminal to the ground. The operator welds the grounding terminal to the PCBA and then presses the aluminum cover onto the grounding terminal to facilitate the aluminum cover conducting the charge on the casing and the PCBA to the ground.

[0007] Preferably, the grounding terminal includes a terminal body, a spring plate, two sets of claws, and two sets of Z-shaped pins. The terminal body is mounted on the PCBA, the spring plate is mounted on the terminal body, both sets of claws are mounted on the terminal body, and both sets of Z-shaped pins are mounted on the terminal body. The operator solders the two sets of Z-shaped pins to the PCBA, and the two sets of claws contact the PCBA and maintain a stressed state, thereby preventing terminal failure caused by creep deformation of the terminal body. The charge on the PCBA is conducted to the aluminum cover through the two sets of Z-shaped pins and the spring plate.

[0008] Preferably, the spring plate is higher than the mating surface of the aluminum cover when not assembled; the operator welds the two sets of Z-shaped pins to the PCBA, and the two sets of claws contact the PCBA and maintain a stressed state, thereby avoiding terminal failure caused by creep deformation of the terminal body. The charge on the PCBA is conducted to the aluminum cover through the two sets of Z-shaped pins and the spring plate.

[0009] Preferably, the grounding terminal also includes a protrusion, which is installed at the top center of the terminal body; the protrusion enhances its support rigidity.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: the workers weld the grounding terminal to the PCBA, and then press the aluminum cover on the grounding terminal, so that the aluminum cover can conduct the charge on the casing and PCBA to the ground. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the unassembled comparative structure of this utility model;

[0012] Figure 2 This is a partially enlarged frontal cross-sectional structural diagram of this utility model;

[0013] Figure 3 This is an isometric structural diagram of the grounding terminal of this utility model.

[0014] The attached diagram is labeled as follows: 01, PCBA; 02, Grounding terminal; 21, Terminal body; 22, Spring plate; 23, Claw; 24, Z-shaped pin; 25, Protrusion; 03, Aluminum cover. Detailed Implementation

[0015] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete.

[0016] Example 1

[0017] This utility model discloses a motor grounding terminal structure, including a PCBA01; it also includes a grounding terminal 02 and an aluminum cover 03. The grounding terminal 02 is soldered onto the PCBA01 to facilitate the discharge of charge from the PCBA01. The aluminum cover 03 is connected to the grounding terminal 02 and conducts the charge of the grounding terminal 02 to the ground. The grounding terminal 02 includes a terminal body 21, a spring plate 22, two sets of claws 23, and two sets of Z-shaped pins 24. The terminal body 21 is mounted on the PCBA01, the spring plate 22 is mounted on the terminal body 21, both sets of claws 23 are mounted on the terminal body 21, and both sets of Z-shaped pins 24 are mounted on the terminal body 21. When not assembled, the spring plate 22 is higher than the mating surface of the aluminum cover. When it is working, firstly, the operator welds the two sets of Z-shaped pins 24 to the pcba01, and the two sets of claws 23 contact the pcba01 and maintain a stressed state, thereby avoiding terminal failure caused by creep deformation of the terminal body 21. The charge on the pcba01 is conducted to the aluminum cover 03 through the two sets of Z-shaped pins 24 and the spring plate 22. Before the aluminum cover 03 is assembled, the spring plate 22 is higher than the mating surface of the aluminum cover. After the aluminum cover 03 is assembled, the spring plate 22 contacts the aluminum cover 03 and maintains a certain elastic force, so that it can continue to provide elastic support force after the two sets of claws 23 undergo creep deformation.

[0018] Example 2

[0019] like Figures 1 to 3 As shown, the present invention provides a motor grounding terminal structure based on embodiment 1. The grounding terminal 02 further includes a protrusion 25, which is installed at the top center of the terminal body 21. During operation, the operator first welds two sets of Z-shaped pins 24 to the pcba01. Two sets of claws 23 contact the pcba01 and maintain a stressed state, thereby preventing terminal failure caused by creep deformation of the terminal body 21. The charge on the pcba01 is conducted to the aluminum cover 03 through the two sets of Z-shaped pins 24 and the spring plate 22. Before the aluminum cover 03 is installed, the spring plate 22 is higher than the mating surface of the aluminum cover. After the aluminum cover 03 is installed, the spring plate 22 contacts the aluminum cover 03 and maintains a certain elastic force, so that it can continue to provide elastic support force after the two sets of claws 23 undergo creep deformation. The support stiffness is improved by setting the protrusion 25.

[0020] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A motor ground terminal structure comprising a pcba (01); characterized in that, Also include ground terminal (02) and aluminum cover (03), ground terminal (02) is welded on pcba (01) and facilitates the charge of pcba (01) export, aluminum cover (03) is connected with ground terminal (02) and the charge of ground terminal (02) is guided into the earth; Ground terminal (02) includes terminal body (21), elastic plate (22), two groups of clamping jaw (23) and two groups of Z-shaped pin (24), terminal body (21) is installed on pcba (01), elastic plate (22) is installed on terminal body (21), two groups of clamping jaw (23) are all installed on terminal body (21), two groups of Z-shaped pin (24) are all installed on terminal body (21).

2. An electrical machine ground terminal structure as claimed in claim 1, characterized in that Also include when not assembled elastic plate (22) is higher than aluminum cover fitting surface.

3. A motor ground terminal structure as claimed in claim 1, wherein Ground terminal (02) also includes protrusion (25), protrusion (25) is installed in the top middle part of terminal body (21).

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