Plastic motor with grounding structure

Abstract

The utility model relates to motor technical field, especially a kind of plastic motor with grounding structure, the bottom is fixed with iron core;Permanent magnet is inherent in the inside of rotary shell and is sleeved outside iron core;The bottom is fixed with terminal block;Rotary shell is fixed with rotating shaft;Rotating shaft is connected with the bearing between the bottom;The inner ring of bearing is fixed on rotating shaft;The outer ring of bearing is fixed on the bottom;Grounding structure is provided on the outer ring of bearing.In use the utility model, the rotating structure grounding of plastic motor is realized, and the safety performance of product is improved.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a plastic motor with a grounding structure. Background Technology

[0002] "Plastic motors" generally refer to motors that use a large amount of plastic materials in their structural components. Their core function is still to convert electrical energy into mechanical energy, but they use plastic materials to replace some of the traditional metal (such as iron, aluminum, and copper) structures to adapt to specific scenario requirements.

[0003] Plastics are mainly used for non-core load-bearing or conductive components, such as motor housings, end covers, and brackets; core components (such as stator cores, rotors, and windings) are still primarily made of metal (silicon steel sheets, copper coils) to ensure electromagnetic performance and mechanical strength. They are characterized by lightweight, good insulation, corrosion resistance, acid and alkali resistance, low cost, and flexible design.

[0004] However, in some applications, grounding of the plastic motor is necessary to prevent electric shock in case of leakage in the spindle structure. But since all rotating parts of the spindle structure, except for the base, are rotating during operation, existing structures cannot ground these rotating parts, posing a safety hazard.

[0005] Therefore, further innovations are needed for existing plastic motors. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings and deficiencies of existing technologies by providing a plastic motor with a grounding structure.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] This utility model discloses a plastic motor with a grounding structure, comprising a rotating housing and a base; an iron core is fixed on the base; a permanent magnet is inherently fitted inside the rotating housing and outside the iron core; a terminal block is fixed on the base; a rotating shaft is fixed on the rotating housing; a bearing is connected between the rotating shaft and the base; the inner ring of the bearing is fixed on the rotating shaft; the outer ring of the bearing is fixed on the base; and a grounding structure is provided on the outer ring of the bearing.

[0009] Furthermore, a bearing protrusion is fixed on the outer ring of the bearing; the bearing protrusion is provided with a bearing threaded hole.

[0010] Furthermore, the bottom of the base is provided with a base positioning groove that matches the bearing protrusion; the bearing protrusion is embedded in the base positioning groove.

[0011] Furthermore, the top surface of the base is provided with an upwardly protruding convex shape; the bearing is inserted into the inner cavity of the convex shape; and the iron core is sleeved on the outside of the convex shape.

[0012] Furthermore, the iron core has an internal positioning hole that matches the convex shape; the convex shape is embedded and fixed in the positioning hole; the positioning hole has a positioning groove; the side wall of the convex shape has a convex outer insert that matches the positioning groove; the convex outer insert is inserted into the positioning groove.

[0013] With the above structure, the beneficial effects of this utility model are as follows: the outer ring, inner ring, and rolling elements of the bearing are all made of conductive materials. The shaft is electrically connected to the grounding structure through the inner ring, rolling elements, and outer ring of the bearing. The grounding structure does not rotate on the base. Therefore, the grounding structure can be directly connected to the grounding wire, realizing the grounding of the rotating structure of plastic motors and improving the safety performance of the product. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a structural diagram of the present invention after disassembling the rotating housing, permanent magnet, and iron core;

[0016] Figure 3 This is a structural diagram of the iron core;

[0017] Figure 4 This is a structural diagram of the base;

[0018] Explanation of reference numerals in the attached figures:

[0019] 1. Rotating housing; 101. Insertion shaft hole; 2. Permanent magnet; 3. Iron core; 301. Iron core positioning groove;

[0020] 4. Shaft; 5. Base; 501. Convex shape; 50101. Convex outer insert; 502. Convex inner cavity;

[0021] 503, base positioning groove; 6, wiring board; 7, bearing; 701, bearing protrusion;

[0022] 70101, Bearing threaded hole. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings.

[0024] like Figures 1 to 4As shown, the plastic motor with a grounding structure of this utility model includes a rotating housing 1 and a base 5; an iron core 3 is fixed on the base 5; a permanent magnet 2 is inherently fitted inside the rotating housing 1 and outside the iron core 3; a terminal block 6 is fixed on the base 5; a rotating shaft 4 is fixed on the rotating housing 1; a winding is provided on the iron core 3, and the winding is connected to the terminal block 6. When energized, it can drive the permanent magnet 2 to rotate, thereby realizing the rotation of the rotating housing 1 and the rotating shaft 4.

[0025] Both the base 5 and the rotating housing 1 are made of plastic; the permanent magnet 2 is coated with rubber in a ring shape; the rotating housing 1 is provided with a shaft insertion hole 101 for inserting and fixing the rotating shaft 4; a bearing 7 is connected between the rotating shaft 4 and the base 5; the inner ring of the bearing 7 is fixed on the rotating shaft 4; the outer ring of the bearing 7 is fixed on the base 5; a grounding structure is provided on the outer ring of the bearing 7.

[0026] The outer ring of bearing 7 is fixed to base 5 by interference fit or glue;

[0027] The outer ring, inner ring, and rolling elements of bearing 7 are all made of conductive material. The rotating shaft 4 is electrically connected to the grounding structure through the inner ring, rolling elements, and outer ring of bearing 7. The grounding structure does not rotate on the base 5. Therefore, the grounding structure can be directly connected to the grounding wire to achieve grounding of the rotating structure of plastic motors and improve the safety performance of the product.

[0028] In a preferred embodiment of this utility model, a bearing protrusion 701 is fixed on the outer ring of the bearing 7; a bearing threaded hole 70101 is provided on the bearing protrusion 701; after the ground wire terminal passes through the terminal with a bolt and is threaded into the bearing threaded hole 70101, the terminal connected to the ground wire is pressed onto the bearing protrusion 701, so that the bearing protrusion 701 is electrically connected to the ground wire.

[0029] In a preferred embodiment of this utility model, the bottom of the base 5 is provided with a base positioning groove 503 that matches the bearing protrusion 701; the bearing protrusion 701 is embedded in the base positioning groove 503; a threaded hole is provided in the base positioning groove 503, and after the bearing protrusion 701 is embedded in the base positioning groove 503, a bolt for connecting the ground wire is added and threaded into the threaded hole, which can fix the outer ring of the bearing 7 to the base 5, simplifying the assembly structure of the base 5 and the bearing 7.

[0030] In a preferred embodiment of this utility model, the top surface of the base 5 is provided with an upwardly protruding convex shape 501; the bearing 7 is inserted into the convex inner cavity 502 of the convex shape 501; and the iron core 3 is sleeved on the outside of the convex shape 501.

[0031] By protruding the convex 501 upwards into the inner hole of the iron core 3, the bearing 7 and the iron core 3 are at the same height, making the overall thickness of the motor thinner.

[0032] In a preferred embodiment of this utility model, the core 3 is provided with a core positioning hole 301 that matches the convex shape 501; the convex shape 501 is embedded and fixed in the core positioning hole 301; the core positioning hole 301 is provided with a core positioning groove 30101; the side wall of the convex shape 501 is provided with a convex outer insert 50101 that matches the core positioning groove 30101; the convex outer insert 50101 is inserted into the core positioning groove 30101; the core 3 is positioned by the convex shape 501 and the convex outer insert 50101, which facilitates the assembly of the core 3.

[0033] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A plastic motor with a grounding structure, comprising a rotating housing (1) and a base (5); an iron core (3) is fixed on the base (5); a permanent magnet (2) is inherently fitted inside the rotating housing (1) around the iron core (3); a terminal block (6) is fixed on the base (5); and a rotating shaft (4) is fixed on the rotating housing (1); characterized in that: A bearing (7) is connected between the rotating shaft (4) and the base (5); the inner ring of the bearing (7) is fixed on the rotating shaft (4); the outer ring of the bearing (7) is fixed on the base (5); and a grounding structure is provided on the outer ring of the bearing (7).

2. A plastic motor with a grounding structure according to claim 1, characterized in that: The bearing (7) has a bearing protrusion (701) fixed on its outer ring; the bearing protrusion (701) has a bearing threaded hole (70101).

3. A plastic motor with a grounding structure according to claim 2, characterized in that: The bottom of the base (5) is provided with a base positioning groove (503) that matches the bearing protrusion (701); the bearing protrusion (701) is embedded in the base positioning groove (503).

4. A plastic motor with a grounding structure according to claim 1, characterized in that: The top surface of the base (5) is provided with an upwardly protruding convex shape (501); the bearing (7) is inserted into the convex inner cavity (502) of the convex shape (501); the iron core (3) is sleeved on the outside of the convex shape (501).

5. A plastic motor with a grounding structure according to claim 4, characterized in that: The core (3) is provided with a core positioning hole (301) that matches the convex shape (501); the convex shape (501) is embedded and fixed in the core positioning hole (301); the core positioning hole (301) is provided with a core positioning groove (30101); the side wall of the convex shape (501) is provided with a convex outer insert (50101) that matches the core positioning groove (30101); the convex outer insert (50101) is inserted into the core positioning groove (30101).

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