Sealing structure and motor using same

Abstract

The utility model discloses a sealing structure and a motor using the same. The sealing structure comprises a seat body, wherein a threading hole for a cable to pass through is formed in the seat body, and a sealing seat for placing a sealing element is formed around the threading hole; the sealing element is arranged between the seat body and the wiring terminal cover and comprises a sealing plate and a sealing convex strip, and the sealing convex strip is formed on the contact surface of the sealing plate and the seat body and / or the wiring terminal sub-cover; a sealing ring groove for placing the sealing convex strip is correspondingly formed in the sealing seat; according to the wiring terminal cover, the sealing element is extruded in the sealing seat through the fastening piece, and the face, facing the fastening piece, of the wiring terminal cover protrudes to form an extrusion piece. According to the utility model, the sealing element is embedded into the sealing seat, and the sealing convex strip and the sealing ring groove are matched with each other and are extruded by the wiring terminal cover, so that the sealing element cannot move in an air tightness test after being fixed, and the sealing effect of a product is ensured.

Description

Technical Field

[0001] This utility model relates to the field of motor protection technology, and in particular to a sealing structure and a motor using the same. Background Technology

[0002] Air tightness is one of the technical indicators of an electric motor. Therefore, an air tightness test is required after the motor is assembled. The motor's cables are brought out from the inside through the opening of the housing and welded to the terminal block. A gasket is required between the terminal block and the housing opening. Existing gaskets use flat washers or O-rings. However, with this single structure, the gaskets are easily displaced by pressure difference during the air tightness test, which can lead to air leakage in the sealed area after the air tightness test. Utility Model Content

[0003] The present invention aims to at least partially solve one of the technical problems in the aforementioned technologies. Therefore, one objective of the present invention is to provide a sealing structure in which the gasket does not shift during airtightness testing;

[0004] Another objective of this invention is to provide an electric motor.

[0005] To achieve the above objectives, the first embodiment of this utility model proposes a sealing structure, comprising:

[0006] The base body forms a cable pass-through opening, and a sealing seat is formed around the cable pass-through opening for placing sealing elements;

[0007] Sealing element: disposed between the base and the terminal cover, including a sealing plate and a sealing strip, the sealing strip being formed on the contact surface between the sealing plate and the base and / or the terminal cover; the sealing seat correspondingly forms a sealing ring groove for the sealing strip to be placed;

[0008] Terminal cover: The sealing element is pressed into the sealing seat by fasteners, and the side facing the fasteners protrudes to form the extrusion.

[0009] According to the sealing structure of this utility model embodiment, the sealing element is embedded in the sealing seat, wherein the sealing protrusion and the sealing ring groove cooperate with each other, and then are squeezed by the terminal cover, so that the sealing element is fixed and will not move during the airtightness test, thus affecting the sealing effect of the product.

[0010] In addition, the sealing structure proposed in the above embodiments of this utility model may also have the following additional technical features:

[0011] Optionally, the minimum distance between the sealing ring groove and the edge of the wire passage is not less than the maximum width of the sealing ring groove. Optionally, there are two sealing protrusions, which are concentrically arranged.

[0012] Optionally, the cross-section of the sealing strip is semi-circular, rectangular, or triangular.

[0013] Optionally, the height of the sealing strip is not less than the maximum value of its width.

[0014] To achieve the above objectives, a second embodiment of this utility model provides a motor, comprising:

[0015] The rotor, stator, and housing are provided, with the stator and rotor housed within the housing, and the lead wires passing through the aforementioned sealing structure provided in the housing.

[0016] According to the embodiment of the present utility model, the motor has a sealing structure in which the sealing element is embedded in the sealing seat. The sealing protrusion and the sealing ring groove cooperate with each other and are then squeezed by the terminal cover, so that the sealing element is fixed and will not move during the airtightness test, thus affecting the sealing effect of the product. Attached Figure Description

[0017] Figure 1 This is an exploded view from one angle according to an embodiment of the present invention;

[0018] Figure 2 This is an exploded view from another angle according to one embodiment of the present invention;

[0019] Figure 3 This is a cross-sectional view of the sealing structure assembly according to an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the sealing structure assembly state according to another embodiment of the present invention.

[0021] Label Explanation:

[0022] Seat 1, Cable pass-through port 11, Sealing seat 12, Sealing ring groove 121

[0023] Sealing element 2, sealing plate 21, sealing protrusion 22

[0024] Terminal block cover 3, extruded part 31. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0026] The sealing element of this utility model is embedded in the sealing seat, where the sealing protrusion and the sealing ring groove cooperate with each other, and are then squeezed by the terminal cover, so that the sealing element will not move during the airtightness test and affect the sealing effect of the product.

[0027] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0028] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0029] During airtightness testing, existing sealing rings can be pushed and squeezed radially, leading to seal failure. In structures such as pipes, the sealing rings can be radially constrained by external threading to prevent seal failure. However, a similar structure cannot be used at the terminal wiring of motors, which poses a problem of seal failure due to airtightness testing.

[0030] In response, Figures 1 to 4 A sealing structure according to the present invention includes:

[0031] Seat 1: Forms a cable pass-through opening 11, and forms a sealing seat 12 around the cable pass-through opening 11 for placing the sealing element 2; by setting the seat 1 for placing the sealing element 2, a constraint in the radial direction is provided, thereby reducing the deformation of the sealing element 2.

[0032] Sealing element 2: disposed between the base 1 and the terminal cover 3, including a sealing plate 21 and a sealing protrusion 22. The sealing protrusion 22 is formed on the contact surface between the sealing plate 21 and the base 1 and / or the terminal cover. The sealing seat 12 is correspondingly formed with a sealing ring groove 121 for placing the sealing protrusion 22. The material of the sealing element 2 can be an elastic material. In this way, when the sealing protrusion 22 is engaged with the sealing ring groove 121, pressure is applied by the terminal cover 3 to make the sealing protrusion 22 and the sealing ring groove 121 fit tightly together to achieve a seal.

[0033] Specifically, the minimum distance between the sealing ring groove 121 and the edge of the wire through-hole 11 is not less than the maximum width of the sealing ring groove 121. This design is adopted to facilitate manufacturing and to better utilize the sealing function of the sealing plate 21.

[0034] In some embodiments, there are two sealing strips 22, arranged concentrically. By providing two sealing strips 22, the airtightness can be further improved.

[0035] Optionally, the cross-section of the sealing protrusion 22 can be semi-circular, rectangular, or triangular. Different sealing protrusion 22 cross-sections can be used to adapt to different motor housing materials. Because different motor housing materials have different processing requirements for the sealing ring groove 121, it may be processed into different ring groove cross-sections, requiring different sealing protrusions 22 to match.

[0036] Optionally, the height of the sealing strip 22 is not less than the maximum value of its width, which can further improve the sealing effect.

[0037] Terminal cover 3: The sealing element 2 is pressed into the sealing seat 12 by fasteners. The side facing the fasteners protrudes to form the extrusion part 31. The terminal cover 3 serves to press the sealing element 2 and also provides a connection terminal for external circuits.

[0038] An electric motor includes a rotor, a stator, and a housing. The stator and rotor are disposed in the housing, and lead wires pass through a sealing structure provided in the housing. The specific configuration of the sealing structure has been described in detail above and will not be repeated here.

[0039] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0040] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0041] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0042] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A sealing structure, characterized in that: include The base body forms a cable pass-through opening, and a sealing seat is formed around the cable pass-through opening for placing sealing elements; A sealing element, disposed between the base and the terminal cover, includes a sealing plate and a sealing protrusion, the sealing protrusion being formed on the contact surface between the sealing plate and the base and / or the terminal cover; a sealing seat correspondingly forms a sealing ring groove for the sealing protrusion to be placed. The terminal cover uses fasteners to press the sealing element into the sealing seat, with the side facing the fastener protruding to form the extrusion.

2. The sealing structure as described in claim 1, characterized in that: The minimum distance between the sealing ring groove and the edge of the wire passage shall not be less than the maximum width of the sealing ring groove.

3. The sealing structure as described in claim 1, characterized in that: There are two sealing strips, which are set concentrically.

4. A sealing structure as described in claim 1, characterized in that: The cross-section of the sealing strip is semi-circular, rectangular, or triangular.

5. A sealing structure as described in claim 1, characterized in that: The height of the sealing ridge strip shall not be less than the maximum value of its width.

6. An electric motor, characterized in that: It includes a rotor, a stator, and a housing, wherein the stator and rotor are disposed in the housing, and the housing is provided with a sealing structure as described in any one of claims 1 to 5.

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