Ground terminal sheet structure, motor stator using the same, and motor

Abstract

The utility model discloses a grounding terminal piece structure and motor stator and motor of application thereof, including stator assembly, plastic package and grounding terminal piece structure, the bottom of bearing seat is exposed on the surface of plastic package bottom, and the end of several wiring terminals projects the surface of plastic package, and the grounding terminal piece structure is installed on the surface of plastic package bottom, and the bearing seat is metal bearing seat, and the bottom outside edge of bearing seat is equipped with the convex part, and the bottom end surface of convex part is equipped with the location clamping slot, and the surface on plastic package bottom is equipped with the location hole, and the first mounting foot of grounding terminal piece structure stretches into the location clamping slot, and is equipped with in the location clamping slot through the location convex rib card, and the second mounting foot stretches into the location hole, and the connecting plate needle is used for with control board subassembly electricity is connected, it makes control board subassembly, bearing seat and stator form ground loop, to reduce the generation of shaft voltage and electromagnetic interference, can avoid the influence control loop, peripheral electrical product, shorten product life and endanger personal safety.

Description

Technical Field

[0001] This utility model relates to a grounding terminal plate structure and its application in motor stators and motors. Background Technology

[0002] Traditional high-voltage motors are prone to two problems during operation: 1. Electrified motor shaft; 2. Electromagnetic interference. An electrified motor shaft shortens product lifespan and endangers personal safety. Electromagnetic interference affects control circuits and peripheral electrical products, and can also impact human health. To address these technical problems, known solutions include: 1. Grounding the motor stator to discharge static electricity and reduce shaft voltage; 2. Grounding the circuit board to dissipate interference energy. For metal-cased motors, the stator, circuit board, and metal casing can be connected to form a grounding loop. However, this method is not feasible for encapsulated motors, as their complex structure and cumbersome installation make them unsuitable for such motors. Summary of the Invention

[0003] The purpose of this invention is to provide a grounding terminal block structure and its application in motor stators and motors, solving the technical problems of complex grounding structures and troublesome installation of existing plastic-encapsulated motor stators and circuit boards.

[0004] The technical solution of this utility model is implemented as follows:

[0005] This utility model provides a grounding terminal sheet structure, characterized in that: it includes a connecting body and a first mounting foot and a second mounting foot disposed on both sides of the connecting body, the outer surface of the first mounting foot is provided with a positioning rib, and a connecting plate pin protrudes on the connecting body and above the second mounting foot, the connecting plate pin being used for electrical connection with the control board assembly.

[0006] The first and second mounting feet mentioned above are both perpendicular to the connector.

[0007] The aforementioned connector, first mounting foot, second mounting foot, and connector pin are integrally formed from metal material.

[0008] A motor stator includes a stator assembly, a molding compound, and a grounding terminal block structure. The stator assembly includes a stator core with through holes, coil windings, end insulation, and bearing housings. The end insulation is mounted on both ends of the stator core, the coil windings are wound on the end insulation, and the bearing housings are installed inside the through holes of the stator core. Each end of the bearing housing has a bearing chamber containing a bearing that supports the two ends of the motor shaft. Several terminals are inserted into the end insulation. The molding compound integrates the stator core, end insulation, coil windings, and bearing housings into a single unit. The bottom of the bearing housing is exposed on the surface of the bottom of the encapsulation body, and the ends of several terminals extend out of the surface of the encapsulation body. The grounding terminal piece structure is installed on the surface of the bottom of the encapsulation body. The bearing housing is a metal bearing housing with a protrusion at the outer edge of the bottom of the bearing housing. The bottom end face of the protrusion has a positioning groove. The surface of the bottom of the encapsulation body has a positioning hole. The first mounting foot of the grounding terminal piece structure extends into the positioning groove and is secured in the positioning groove by the positioning rib. The second mounting foot extends into the positioning hole.

[0009] An annular sleeve extends axially from the bottom edge of the encapsulated body, forming a cavity with the bottom of the encapsulated body for mounting the control board assembly. Several mounting feet are provided on the outer surface of the annular sleeve, and a cable outlet groove is also provided on the annular sleeve.

[0010] The outer surface of the bearing housing described above is provided with uneven steps; the outer surface of the bearing housing is provided with a number of spaced bosses, and the ends of the bosses are provided with guide slopes.

[0011] The bearing housing described above has positioning ribs on its outer surface.

[0012] An electric motor includes a motor shaft, a motor stator, a rotor assembly, a control board assembly, and a mounting cover. The rotor assembly is fitted over the motor stator. The motor stator is described above, with an annular sleeve extending axially from the bottom edge of a plastic encapsulation body. The annular sleeve and the bottom of the plastic encapsulation body form a cavity for mounting the control board assembly. The mounting cover is installed at the bottom of the annular sleeve and seals the cavity. The control board assembly is installed within the cavity and is electrically connected to the terminal blocks of the motor stator's wiring terminals and grounding terminal block structure.

[0013] Compared with the prior art, this utility model has the following advantages:

[0014] 1. A motor stator, comprising a stator assembly, a molding compound, and a grounding terminal block structure. The stator assembly includes a stator core with through holes, coil windings, end insulation, and bearing housings. The end insulation is mounted on both ends of the stator core. The coil windings are wound on the end insulation. The bearing housings are installed inside the through holes of the stator core. Each end of the bearing housing has a bearing chamber containing a bearing for supporting the two ends of the motor shaft. Several terminals are inserted into the end insulation. The molding compound molds the stator core, end insulation, coil windings, and bearing housings into a single unit. The bottom of the bearing housing is exposed on the bottom surface of the molding compound, and the ends of the terminals extend beyond the surface of the molding compound. A grounding terminal block is also present. The sub-plate structure is installed on the surface of the bottom of the encapsulation body. The grounding terminal plate structure is one of the grounding terminal plate structures described above. The bearing housing is a metal bearing housing. A protrusion is provided on the outer edge of the bottom of the bearing housing. A positioning groove is provided on the bottom end face of the protrusion. A positioning hole is provided on the surface of the bottom of the encapsulation body. The first mounting foot of the grounding terminal plate structure extends into the positioning groove and is secured in the positioning groove by the positioning rib. The second mounting foot extends into the positioning hole. The connecting pin is used for electrical connection with the control board assembly. By adding a grounding terminal plate structure installation structure to the bearing housing of the motor stator, the control board assembly, bearing housing and stator form a grounding circuit. This structure is simple, easy to install, has good positioning effect and reasonable structural layout.

[0015] 2. Other advantages of this utility model are described in detail in the embodiment section of the specification. Attached Figure Description

[0016] Figure 1 A perspective view provided for Embodiment 1 of this utility model;

[0017] Figure 2 A perspective view provided for Embodiment 2 of this utility model;

[0018] Figure 3 This is another perspective view of Embodiment 2 of the present invention;

[0019] Figure 4 This is a partial exploded view provided for Embodiment 2 of the present invention;

[0020] Figure 5 This is a partial exploded view of the structure provided in Embodiment 2 of this utility model;

[0021] Figure 6 This is a perspective view of the bearing housing provided in Embodiment 2 of this utility model;

[0022] Figure 7 This is a perspective view of the bearing housing from another angle, provided in Embodiment 2 of this utility model.

[0023] Figure 8 A perspective view provided for Embodiment 3 of this utility model;

[0024] Figure 9 This is a front view of Embodiment 3 of the present utility model;

[0025] Figure 10 for Figure 9 Sectional view of AA. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] Example 1:

[0028] like Figure 1 As shown, this embodiment provides a grounding terminal block structure, characterized in that: it includes a connecting body 4 and a first mounting foot 1 and a second mounting foot 2 disposed on both sides of the connecting body 4. The outer surface of the first mounting foot 1 is provided with a positioning rib 5. A connecting plate pin 3 protrudes from the connecting body 4 and is located above the second mounting foot 2. The connecting plate pin 3 is used for electrical connection with the control board assembly 100. The structure is simple and facilitates the electrical connection between the motor stator and the control board assembly.

[0029] The first mounting foot 1 and the second mounting foot 2 mentioned above are both perpendicular to the connecting body 4.

[0030] The aforementioned connector 4, first mounting foot 1, second mounting foot 2, and connector pin 3 are integrally formed from metal material.

[0031] Example 2:

[0032] like Figures 2 to 7As shown, a motor stator includes a stator assembly 61, a plastic encapsulation body 62, and a grounding terminal plate structure. The stator assembly 61 includes a stator core 611 with through holes, a coil winding 612, end insulation 613, and a bearing housing 614. The end insulation 613 is mounted on both end faces 111 of the stator core 611. The coil winding 612 is wound on the end insulation 613. The bearing housing 614 is installed inside the through holes of the stator core 611. The bearing housing 614 has a bearing plate at both ends. There is a bearing housing 6140, which houses a bearing 10. The bearing 10 supports both ends of the motor shaft. Several terminals 615 are inserted into the end insulation 613. A molding compound 62 molds the stator core 611, the end insulation 613, the coil winding 612, and the bearing housing 614 into a single unit. The bottom of the bearing housing 614 is exposed on the bottom surface of the molding compound 62, and the ends of the terminals 615 extend beyond the surface of the molding compound 62. The grounding terminal plate structure is installed on the bottom surface of the encapsulated body 62. Its features include: the grounding terminal plate structure is the type described in Embodiment 1 above; the bearing seat 614 is a metal bearing seat; a protrusion 6141 is provided at the outer edge of the bottom of the bearing seat 614; a positioning groove 6142 is provided on the bottom end face of the protrusion 6141; a positioning hole 621 is provided on the bottom surface of the encapsulated body 62; the first mounting foot 1 of the grounding terminal plate structure extends into the positioning groove 6142 and is secured in the positioning groove 6142 by the positioning rib 5; the second mounting foot 2 extends into the positioning hole 621. By adding a grounding terminal plate structure to the bearing seat of the motor stator, the control board assembly, bearing seat, and stator form a grounding circuit, thereby reducing shaft voltage and electromagnetic interference. This avoids affecting the control circuit, peripheral electrical products, shortening product lifespan, and endangering personal safety. The structure is simple, easy to install, has good positioning effect, and a reasonable structural layout.

[0033] The bottom edge of the aforementioned encapsulated body 62 extends axially into an annular sleeve portion 622. The annular sleeve portion 622 and the bottom of the encapsulated body 62 form a cavity 620 for mounting the control board assembly 100. The outer surface of the annular sleeve portion 622 is provided with several mounting feet 6221. The annular sleeve portion 622 is also provided with a cable outlet groove 6222. The structure is reasonably arranged, eliminating the need for an additional control box shell. It is integrally molded, reducing manufacturing costs.

[0034] The outer surface of the bearing housing 614 is provided with uneven steps 6145; the outer surface of the bearing housing 614 is provided with a number of spaced bosses 6146, and the end of the bosses 6146 is provided with guide slopes 6143 for easy installation.

[0035] The outer surface of the aforementioned bearing housing 614 is provided with positioning ribs 6144 for easy positioning and installation. Example 3:

[0036] like Figures 8 to 9As shown, an electric motor includes a motor shaft 400, a motor stator, a rotor assembly 200, a control board assembly 100, and a mounting cover plate 300. The rotor assembly 200 is fitted over the motor stator. The motor stator is described in Embodiment 2. An annular sleeve portion 622 extends axially from the bottom edge of a plastic encapsulation body 62. The annular sleeve portion 622 and the bottom of the plastic encapsulation body 62 form a cavity 620 for mounting the control board assembly. The mounting cover plate 300 is installed at the bottom of the annular sleeve portion and seals the cavity 620. The control board assembly 100 is installed inside the cavity and is electrically connected to the wiring terminals and grounding terminal plate structure of the motor stator. By adding a grounding terminal plate structure mounting structure to the bearing housing of the motor stator, a grounding circuit is formed between the control board assembly, the bearing housing, and the stator, reducing shaft voltage and electromagnetic interference. This avoids affecting the control circuit, peripheral electrical products, shortening product lifespan, and endangering personal safety. The structure is simple, easy to install, has good positioning effect, and a reasonable structural layout.

[0037] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited thereto. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model are equivalent substitutions and are included within the protection scope of the present utility model.

Claims

1. A grounding terminal plate structure, characterized in that: It includes a connector (4) and a first mounting foot (1) and a second mounting foot (2) on both sides of the connector (4). The outer surface of the first mounting foot (1) is provided with a positioning rib (5). A connector pin (3) protrudes on the connector (4) and above the second mounting foot (2). The connector pin (3) is used to electrically connect with the control board assembly (100).

2. The grounding terminal sheet structure according to claim 1, characterized in that: The first mounting foot (1) and the second mounting foot (2) are both perpendicular to the connector (4).

3. A grounding terminal block structure according to claim 1 or 2, characterized in that: The connector (4), the first mounting foot (1), the second mounting foot (2) and the connector pin (3) are made of metal material in one piece.

4. A motor stator, comprising a stator assembly (61), a plastic encapsulation body (62), and a grounding terminal plate structure, wherein the stator assembly (61) includes a stator core (611) with through holes, a coil winding (612), end insulation (613), and a bearing housing (614), the end insulation (613) being mounted on both end faces (111) of the stator core (611), the coil winding (612) being wound on the end insulation (613), and the bearing housing (614) being mounted on the stator. Inside the through hole of the iron core (611), a bearing chamber (6140) is provided at each end of the bearing housing (614). The bearing chamber (6140) contains a bearing (10), which supports the two ends of the motor shaft. Several terminals (615) are inserted into the end insulation (613). The encapsulation body (62) injection molds the stator iron core (611), the end insulation (613), the coil winding (612), and the bearing housing (614) into a whole. The bottom of the bearing housing (614) is exposed on the surface of the bottom of the encapsulated body (62), and the ends of several terminals (615) extend out of the surface of the encapsulated body (62). The grounding terminal sheet structure is installed on the surface of the bottom of the encapsulated body (62). The bearing housing (614) is a metal bearing housing. A protrusion (6141) is provided at the outer edge of the bottom of the bearing housing (614). A positioning groove (6142) is provided on the bottom end face of the protrusion (6141). A positioning hole (621) is provided on the surface of the bottom of the encapsulated body (62). The first mounting foot (1) of the grounding terminal sheet structure extends into the positioning groove (6142) and is secured in the positioning groove (6142) by the positioning rib (5). The second mounting foot (2) extends into the positioning hole (621).

5. A motor stator according to claim 4, characterized in that: An annular sleeve portion (622) extends axially from the bottom edge of the encapsulated body (62). The annular sleeve portion (622) and the bottom of the encapsulated body (62) form a cavity (620) for mounting the control board assembly (100). Several mounting feet (6221) are provided on the outer surface of the annular sleeve portion (622). A wire outlet groove (6222) is also provided on the annular sleeve portion (622).

6. A motor stator according to claim 4 or 5, characterized in that: The outer surface of the bearing housing (614) is provided with concave and convex steps (6145); the outer surface of the bearing housing (614) is provided with a number of spaced bosses (6146), and the end of the bosses (6146) is provided with guide slopes (6143).

7. A motor stator according to claim 6, characterized in that: The bearing housing (614) has a positioning rib (6144) on its outer surface.

8. An electric motor, comprising a motor shaft (400), a motor stator, a rotor assembly (200), a control board assembly (100), and a mounting cover (300), wherein the rotor assembly (200) is fitted over the motor stator, characterized in that: The motor stator is a motor stator as described in any one of claims 4 to 7. The bottom edge of the encapsulated body (62) extends axially to form an annular sleeve portion (622). The annular sleeve portion (622) and the bottom of the encapsulated body (62) form a cavity (620) for mounting the control board assembly. The mounting cover plate (300) is installed at the bottom of the annular sleeve portion and covers the cavity (620). The control board assembly (100) is installed in the cavity and is electrically connected to the terminal block pin (3) of the wiring terminal and grounding terminal plate structure of the motor stator.

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