Carbon brush cover assembly and vacuum pump motor

Abstract

The utility model discloses a carbon brush cover assembly and a vacuum pump motor. The carbon brush cover assembly comprises a braid wire, a component and a connecting piece which is in spot welding connection with the braid wire and the component. The connecting piece comprises a plurality of connecting sub-pieces and a plurality of breakpoint reserved parts which can be broken independently. A plurality of spot welding connecting positions are reserved on each connecting component; all the breakpoint reserved parts connect all the connecting sub-parts into an open annular structure according to the placing positions of the connecting pieces, when the connecting pieces are in the plastic coating state, all the breakpoint reserved parts are in the disconnected state, and all the connecting sub-parts are not connected with one another. According to the utility model, the connecting piece is integrally placed in a mold, and after injection molding is completed, the corresponding cut-off reserved part is punched for point breaking, so that the manufacturability and reliability of the carbon brush cover assembly are enhanced, and the assembly efficiency is greatly improved; the connecting mode of the braid wire, the component and the connecting piece is changed into spot welding connection, so that the assembling operation is simple, the reliability is improved, and the cold solder joint risk is reduced.

Description

Technical Field

[0001] The utility model belongs to the field of carbon brush cover assemblies, and particularly relates to a carbon brush cover assembly and a vacuum pump motor. Background Art

[0002] The vacuum pump motor mainly consists of a front cover assembly, a sealing ring, a carbon brush cover assembly, screws, a stator assembly, a rotor assembly, a rubber plug, a power cord assembly, a voltage stabilizing tube, a capacitor, and external hexagon screws.

[0003] The following disadvantages exist in the assembly process of the carbon brush cover assembly in the existing vacuum pump motor:

[0004] 1. When the connecting piece of the carbon brush cover assembly is integrally plastic-coated on the mold, four pieces are required, and the positions of each piece need to be placed correctly in sequence, with extremely low efficiency and a risk of misplacing the connecting piece.

[0005] 2. The braided wire, components, and connecting piece on the carbon brush cover assembly are welded using a soldering iron. The process is complex, with low efficiency and high cost, and there is a high risk of false soldering. Summary of the Utility Model

[0006] In view of the above deficiencies of the prior art, the present utility model provides a carbon brush cover assembly and a vacuum pump motor.

[0007] The purpose of the present utility model is achieved through the following technical solutions:

[0008] In a first aspect, a carbon brush cover assembly is provided. The carbon brush cover assembly includes a braided wire, components, and a connecting piece that is spot-welded to the braided wire and the components. The connecting piece includes:

[0009] A plurality of connecting sub-pieces, each of which has a plurality of spot-welding connection positions reserved thereon; and

[0010] A plurality of break point reserved parts that can be individually interrupted. All the break point reserved parts connect all the connecting sub-pieces into an open ring structure according to the placement position of the connecting piece;

[0011] When the connecting piece is in an assembled state, the connecting piece is connected into an open ring structure, and the whole is placed inside the carbon brush cover assembly;

[0012] When the connecting piece is in a plastic-coated state, all the break point reserved parts are in a disconnected state, and each connecting sub-piece is not connected to each other.

[0013] In some embodiments, the connecting sub-piece includes a first sub-piece, a second sub-piece, a third sub-piece, and a fourth sub-piece, and the break point reserved part includes a first reserved part, a second reserved part, a third reserved part, and a fourth reserved part;

[0014] When all the connecting components are connected into an open annular structure, the first component is connected to the second component through the first reserved part, the second component is connected to the third component through the second reserved part and the third reserved part, and the fourth component is connected to the third component through the fourth reserved part.

[0015] In some embodiments, the first component includes a first main body part. Both ends of the first main body part have a first spot welding connection position and a second spot welding connection position extending outward parallel to the first main body part. The side of the second spot welding connection position has a first split part extending upward perpendicular to the first main body part, and the top of the first split part has a first U-shaped groove.

[0016] In some embodiments, the second component is an L-shaped structure. Both ends of the second component have a third spot welding connection position and a fourth spot welding connection position extending outward parallel to the second component, and there is a fifth spot welding connection position extending outward parallel to the second component near the corner of the second component.

[0017] In some embodiments, the third component is an L-shaped structure. Both ends of the third component have a sixth spot welding connection position and a seventh spot welding connection position extending outward parallel to the third component, and there is an eighth spot welding connection position extending outward parallel to the third component near the corner of the third component.

[0018] In some embodiments, the fourth component includes a fourth main body part. Both ends of the fourth main body part have a ninth spot welding connection position and a tenth spot welding connection position extending outward parallel to the fourth main body part. The side of the tenth spot welding connection position has a fourth split part extending upward perpendicular to the fourth main body part, and the top of the fourth split part has a second U-shaped groove.

[0019] In some embodiments, when all the connecting components are connected into an open annular structure, the first spot welding connection position in the first component is connected to the third spot welding connection position in the second component through the first reserved part, the fourth spot welding connection position in the second component is connected to the third component through the second reserved part, the sixth spot welding connection position in the fourth component is connected to the second component through the third reserved part, and the seventh spot welding connection position in the third component is connected to the ninth spot welding connection position in the fourth component through the fourth reserved part.

[0020] In some embodiments, each connecting component has a number of small holes penetrating its upper and lower end faces.

[0021] In some embodiments, all the spot welding connection positions have concave dot textures.

[0022] In a second aspect, a vacuum pump motor is provided, including: the carbon brush cover assembly as described above.

[0023] The beneficial effects of the present utility model are as follows: By placing the connecting piece as a whole into the mold, after injection molding, holes are drilled at the corresponding disconnection reserved parts for breaking points, which enhances the processability and reliability of the carbon brush cover assembly and greatly improves the assembly efficiency; By changing the connection method of the braided wire, components and the connecting piece to spot welding, the assembly operation is simple, the reliability is improved, and the risk of false soldering is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 Overall structure diagram of the carbon brush cover in an embodiment of the present utility model;

[0026] Figure 2 Overall structure diagram of the connecting piece in an embodiment of the present utility model;

[0027] Figure 3 Structure comparison diagram of the first sub-component in an embodiment of the present utility model;

[0028] Figure 4 Structure comparison diagram of the second sub-component in an embodiment of the present utility model;

[0029] Figure 5 Structure comparison diagram of the third sub-component in an embodiment of the present utility model;

[0030] Figure 6 Structure comparison diagram of the fourth sub-component in an embodiment of the present utility model;

[0031] Figure 7 Structure change diagram of the present utility model in an embodiment compared with the prior art;

[0032] Figure 8 Overall structure diagram of the vacuum pump motor in an embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] In order to better understand the technical solutions of the present application, the following will describe the embodiments of the present application in detail with reference to the drawings.

[0034] As Figures 1-6 shown, the carbon brush cover assembly includes: a braided wire 10, components 20, and a connecting piece 30 that is spot-welded to the braided wire 10 and the components 20.

[0035] The connecting member 30 includes a plurality of connecting sub-members 301 and a plurality of break-point reserved portions 302 that can be individually interrupted. A plurality of spot-welding connection positions 303 are reserved on each connecting sub-member 301; all the break-point reserved portions 302 connect all the connecting sub-members 301 into an open annular structure according to the placement position of the connecting member 30. When the connecting member 30 is in the assembled state, the connecting member 30 is connected into an integral open annular structure and is placed inside the carbon brush cover assembly; when the connecting member 30 is in the plastic-coated state, all the break-point reserved portions 302 are in the disconnected state, and each connecting sub-member 301 is not connected to each other.

[0036] It can be understood that when the carbon brush cover assembly is assembled, the connecting member 30 is an integral structure, and it is convenient to place it in the correct position as a whole. After the connecting member 30 is placed, it is integrally injection-molded. When the connecting member 30 is in the plastic-coated state after injection molding, the break-point reserved portions 302 of the connecting member 30 can be drilled and interrupted so that each connecting sub-member 301 becomes an independent structure. Because the shape and structure of each connecting sub-member 301 are different, as Figure 7-1 shown, the prior art is roughly similar to the structure of the present invention, but the connecting pieces in the prior art are split-type, and need to be placed one by one in the corresponding positions in the mold, and the structure of each piece is different, which is easy to be assembled incorrectly. And as Figure 2-7 shown, the biggest difference between the present invention and the prior art is that the connecting member 30 adopts an integral structure, which is first assembled as a whole and then broken into independent connecting sub-members 301, so that the assembly efficiency is greatly improved and the risk of incorrect placement of the connecting member 30 is greatly reduced.

[0037] As Figure 3-6 shown, in an embodiment, the connecting sub-member 301 includes a first sub-member 3011, a second sub-member 3012, a third sub-member 3013 and a fourth sub-member 3014, and the break-point reserved portion 302 includes a first reserved portion 3021, a second reserved portion 3022, a third reserved portion 3023 and a fourth reserved portion 3024; when all the connecting sub-members 301 are connected into an open annular structure, the first sub-member 3011 is connected to the second sub-member 3012 through the first reserved portion 3021, the second sub-member 3012 is connected to the third sub-member 3013 through the second reserved portion 3022 and the third reserved portion 3023, and the fourth sub-member 3014 is connected to the third sub-member 3013 through the fourth reserved portion 3024.

[0038] It can be understood that the above structure is only the quantity and connection relationship of the connecting sub-member 301 and the break-point reserved portion 302 in a preferred embodiment. In other embodiments, the quantities of the connecting sub-member 301 and the break-point reserved portion 302 can also be set differently.

[0039] As Figure 3As shown, in one embodiment, the first sub-component 3011 includes a first main body portion 3011a. At both ends of the first main body portion 3011a, there are a first spot welding connection position 303a and a second spot welding connection position 303b that extend outward parallel to the first main body portion 3011a. On the side of the second spot welding connection position 303b, there is a first split portion 3011b that extends upward perpendicular to the first main body portion 3011a. At the top of the first split portion, there is a first U-shaped groove 3011c. In one embodiment, the extending directions of the first spot welding connection position 303a and the second spot welding connection position 303b are opposite.

[0040] As Figure 4 shown, in one embodiment, the second sub-component 3012 is an L-shaped structure. At both ends of the second sub-component 3012, there are a third spot welding connection position 303c and a fourth spot welding connection position 303d that extend outward parallel to the second sub-component 3012. Near the corner of the second sub-component 3012, there is a fifth spot welding connection position 303e that extends outward parallel to the second sub-component.

[0041] As Figure 5 shown, in one embodiment, the third sub-component 3013 is an L-shaped structure. At both ends of the third sub-component 3013, there are a sixth spot welding connection position 303f and a seventh spot welding connection position 3014a that extend outward parallel to the third sub-component 3013. Near the corner of the third sub-component 3013, there is an eighth spot welding connection position 303h that extends outward parallel to the third sub-component 3013.

[0042] It can be understood that for the fifth spot welding connection position 303e that extends outward and the eighth spot welding connection position 303h that extends outward, the "outside" here refers to the outside relative to the inside of the ring when the connecting sub-component is an open ring structure.

[0043] As Figure 6 shown, in one embodiment, the fourth sub-component 3014 includes a fourth main body portion 3014a. At both ends of the fourth main body portion 3014a, there are a ninth spot welding connection position 303i and a tenth spot welding connection position 303j that extend outward parallel to the fourth main body portion 3014a. On the side of the tenth spot welding connection position 303j, there is a fourth split portion 3014b that extends upward perpendicular to the fourth main body portion 3014a. At the top of the fourth split portion 3014b, there is a second U-shaped groove 3014c. In one embodiment, the extending directions of the ninth spot welding connection position 303i and the tenth spot welding connection position 303j are opposite.

[0044] It can be understood that Figure 3-1 shows the prototype of the first sub-component 3011, Figure 3-1 the first sub-component 3011 shown; Figure 4-1 shows the prototype of the second sub-component 3012, Figure 4-2The second sub-component 3012 shown; Figure 5-1 show the prototype of the third sub-component 3013, Figure 5-2 the third sub-component 3013 shown; Figure 6-1 show the prototype of the fourth sub-component 3014, Figure 6-2 the fourth sub-component 3014 shown. The structure of the connecting sub-component 301 has changed greatly compared with the prototype structure. In order to facilitate connecting all the connecting sub-components 301 into an open annular structure and re-breaking them into independent structures after assembly, each connecting sub-component 301 changes all the different inclination angles and corners in the prototype to right-angle corners; specifically, in the first sub-component 3011 and the fourth sub-component 3014, the inclination angles of the first main body part 3011a and the fourth main body part 3014a are changed to two right-angle corners to achieve the same effect. In the second sub-component 3012 and the third sub-component 3013, the corners that are not originally right angles are changed to right-angle corners. And compared with the prototype, the original notches of the second sub-component 3012 and the third sub-component 3013 of the present utility model are cancelled.

[0045] As Figure 2-6 shown, in an embodiment, when all the connecting sub-components 301 are connected into an open annular structure, the first spot welding connection position 303a in the first sub-component 3011 is connected to the third spot welding connection position 303c in the second sub-component 3012 through the first reserved part 3021, the fourth spot welding connection position 303d in the second sub-component 3012 is connected to the third sub-component 3013 through the second reserved part 3022, the sixth spot welding connection position 303f in the fourth sub-component 3014 is connected to the second sub-component 3012 through the third reserved part 3023, and the seventh spot welding connection position 303g in the third sub-component 3013 is connected to the ninth spot welding connection position 303i in the fourth sub-component 3014 through the fourth reserved part 3024. In an embodiment, the first sub-component 3011 and the fourth sub-component 3014 have symmetric and identical structures.

[0046] It can be understood that after the break point reserved parts 302 connect all the connecting sub-components 301, the connecting member 30 forms an open annular structure. The opening refers to the gap between the second spot welding connection position 303b in the first sub-component 3011 and the tenth spot welding connection position 303j in the fourth sub-component 3014, and the first split part 3011b in the first sub-component 3011 is parallel to the fourth split part 3014b in the fourth sub-component 3014.

[0047] As Figure 2 shown, in order to achieve the stability of injection molding combination, in an embodiment, each connecting sub-component 301 has a plurality of small holes 304 that penetrate its upper end surface and lower end surface.

[0048] As Figure 2As shown, in order to achieve the reliability of spot welding, reduce the risk of false soldering, and increase the welding efficiency, in one embodiment, all spot welding connection positions 303 have concave dot textures.

[0049] It can be understood that because the spot welding connection position 303 has a concave dot texture, it is easy to find the position adjacent to the break point reservation part 302, which increases the working efficiency. For the convenience of breaking, the thickness of the break point reservation part 302 has certain limitations and it has a certain length.

[0050] It can be understood that compared with the split connector 30 of the prior art, the present utility model reduces the number of U-shaped grooves on the connector 30, and unifies various corners with different angles into right-angle corners, reducing the production difficulty of the connector 30. The right-angle corners are easier to place and position, improving the assembly efficiency of the connector 30.

[0051] As Figure 8 shown, Figure 8-3 is the plane structure diagram of the carbon brush cover assembly in the present utility model, Figure 8-1 is the plane diagram of the vacuum pump motor of the present utility model, Figure 8-2 is Figure 8-1 the A-A sectional view in Figure 8-2 The 8-3 cited in Figure 8-3 refers to the assembly position of the carbon brush cover assembly in the vacuum pump motor of the present utility model.

[0052] The working process of the present utility model is as follows: When assembling the carbon brush cover assembly, the connector 30 is an integral structure, and the whole is put in, which is convenient for placing the correct position. After the connector 30 is placed, the whole is injection molded. When the connector 30 is in the plastic-coated state after injection molding, the break point reservation part 302 of the connector 30 can be drilled and broken so that each connection sub-part 301 becomes an independent structure. Finally, the braided wire 10 and the component 20 are welded at the position with a 0.1-depth concave texture 303 on the connector 30 by spot welding. By putting the connector 30 into the mold as a whole, after injection molding, holes are drilled at the corresponding break reservation parts for breaking points, which enhances the processability and reliability of the carbon brush cover assembly and greatly improves the assembly efficiency; by changing the connection method of the braided wire 10, the component 20 and the connector 30 to spot welding, the assembly operation is simple, the reliability is improved, and the risk of false soldering is reduced.

[0053] The above are only the preferred embodiments of one or more embodiments of this specification, and are not intended to limit one or more embodiments of this specification. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of one or more embodiments of this specification shall be included within the scope protected by one or more embodiments of this specification.

Claims

1. A carbon brush cover assembly, characterized in that: The carbon brush cover assembly includes a braided wire, components, and a connector connected to the braided wire and the components by spot welding, and the connector includes: A plurality of connecting parts, each of which has a plurality of spot welding connection positions reserved thereon; and A plurality of breakpoint reserved parts that can be broken individually, all of which connect all of the connecting parts into an open annular structure according to the placement positions of the connecting parts; When the connecting member is in an assembled state, the connecting member is connected to form an open annular structure, which is placed in the carbon brush cover assembly as a whole; When the connecting piece is in the plastic-coated state, all the breakpoint reserved portions are in a disconnected state, and each of the connecting sub-pieces is not connected to each other.

2. The carbon brush cover assembly according to claim 1, characterized in that: The connecting component includes a first component, a second component, a third component and a fourth component, and the breakpoint reserved portion includes a first reserved portion, a second reserved portion, a third reserved portion and a fourth reserved portion; When all the connecting parts are connected to form an open ring structure, the first part is connected to the second part through the first reserved portion, the second part is connected to the third part through the second reserved portion and the third reserved portion, and the fourth part is connected to the third part through the fourth reserved portion.

3. The carbon brush cover assembly according to claim 2, characterized in that: The first sub-component includes a first main body part, and both ends of the first main body part have a first spot welding connection position and a second spot welding connection position extending outward parallel to the first main body part, and the side of the second spot welding connection position has a first split part extending upward perpendicular to the first main body part, and the top of the first split part has a first U-shaped groove.

4. The carbon brush cover assembly according to claim 2, characterized in that: The second sub-component is an L-shaped structure, with a third spot welding connection position and a fourth spot welding connection position extending outwardly parallel to the second sub-component at both ends of the second sub-component, and a fifth spot welding connection position extending outwardly parallel to the second sub-component near the corner of the second sub-component.

5. The carbon brush cover assembly according to claim 2, characterized in that: The third sub-component is an L-shaped structure, and has a sixth spot welding connection position and a seventh spot welding connection position extending outwardly parallel to the third sub-component at both ends of the third sub-component, and an eighth spot welding connection position extending outwardly parallel to the third sub-component near the corner of the third sub-component.

6. The carbon brush cover assembly according to claim 2, characterized in that: The fourth sub-component includes a fourth main body part, and the two ends of the fourth main body part have a ninth spot welding connection position and a tenth spot welding connection position extending outward parallel to the fourth main body part, and the side of the tenth spot welding connection position has a fourth sub-part extending upward perpendicular to the fourth main body part, and the top of the fourth sub-part has a second U-shaped groove.

7. The carbon brush cover assembly according to any one of claims 3 to 6, characterized in that: When all the connecting components are connected to form an open ring structure, the first spot welding connection position in the first component is connected to the third spot welding connection position in the second component through the first reserved portion, the fourth spot welding connection position in the second component is connected to the third component through the second reserved portion, the sixth spot welding connection position in the fourth component is connected to the second component through the third reserved portion, and the seventh spot welding connection position in the third component is connected to the ninth spot welding connection position in the fourth component through the fourth reserved portion.

8. The carbon brush cover assembly according to claim 1, characterized in that: Each of the connecting parts has a plurality of small holes which penetrate the upper end surface and the lower end surface thereof.

9. The carbon brush cover assembly according to claim 1, characterized in that: All of the spot welded connections have a concave texture.

10. A vacuum pump motor, characterized in that: A carbon brush cover assembly comprising any one of claims 1 to 9.

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