Electric brush mounting structure for air compressor motor

Abstract

The utility model discloses an electric brush installation structure used for an air compressor motor, comprising a carbon brush holder, a base plate installed on the carbon brush holder and a brush holder detachably installed on the base plate, the inner side of the brush holder is provided with an installation opening for sleeving a carbon brush, and the surface of the base plate is provided with two positioning columns located at two sides of the brush holder. The spiral spring is sleeved between the two positioning columns, the brush holder comprises a limiting plate and a cover plate detachably installed on the limiting plate, a threading groove is formed in the cover plate, a copper wire connected with the carbon brush penetrates through the threading groove to be connected to the carbon brush frame, the limiting plate comprises two side plates which are arranged oppositely, and arc-shaped plates bent towards the inner side are installed on the outer walls of the inner ends of the side plates. The brush holder is composed of the limiting plate and the cover plate which are detachably connected, positioning and sleeving of the spiral spring relative to the positioning column can be directly completed in the uncovering state, and the positioning and mounting efficiency of the spiral spring is improved; the detachable arrangement mode of the brush holder is matched with the far-end opening of the threading groove on the cover plate, so that the copper wire is more convenient to thread, and the efficiency of replacing the carbon brush is improved on the whole.

Description

Technical Field

[0001] The utility model relates to the technical field of carbon brush installation structures, and particularly relates to a brush installation structure for an air compressor motor. Background Art

[0002] The contact between the carbon brush and the rotor in the motor makes the carbon brush extremely prone to wear. Excessive wear of the carbon brush will cause the contact pressure with the commutator to be on the low side, which is likely to generate large sparks and there may be a break in the armature winding. Therefore, when the carbon brush wears, it needs to be replaced. However, the common brush holder structure in the market, such as the patent "CN217388403U", has openings in the middle of both sides of the brush holder, and a fastener positioning part for limiting the contact part of the movable spring is arranged outward at the opening part. The defects of this structure are as follows:

[0003] (1) When installing the carbon brush, usually the movable spring is first placed along the opening part outside the fastener positioning part, and then the carbon brush is abutted against the outside of the movable spring and the movable spring is squeezed into the brush holder. However, since the movable spring is difficult to be effectively positioned when installing the carbon brush, the situation of spring falling off often occurs, resulting in low replacement efficiency of the carbon brush;

[0004] (2) The prior art, such as the patent "CN220605167U", sets two limit posts for sleeving the contact part of the movable spring at the front end of the fastener positioning part. Although the positioning of the movable spring can be effectively realized, the top plate of the brush holder extends outside the limit posts. When installing the movable spring, it is necessary to first stretch the movable spring around the inner side of the top plate of the brush holder and then sleeve it on the limit posts, with low operation efficiency. Therefore, the utility model aims to provide a structure that is convenient for replacing the carbon brush and the movable spring. Summary of the Utility Model

[0005] For this reason, the utility model provides a brush installation structure for an air compressor motor to solve the above defects in the prior art.

[0006] A brush installation structure for an air compressor motor includes a carbon brush holder, a bottom plate installed on the carbon brush holder, and a brush holder detachably installed on the bottom plate. An installation opening for sleeving the carbon brush is arranged inside the brush holder. Two positioning posts located on both sides of the brush holder are arranged on the surface of the bottom plate. A spiral spring is sleeved between the two positioning posts. The brush holder includes a limit plate and a cover plate detachably installed on the limit plate. A wire groove is arranged on the cover plate, and a copper wire connected to the carbon brush passes through the wire groove and is connected to the carbon brush holder. The limit plate includes two side plates arranged opposite to each other. An arc-shaped plate bent inward is installed on the outer wall of the inner end of the side plate, and the arc-shaped plate corresponds to the positioning post.

[0007] Preferably, a guiding edge is arranged above the side plate located outside the arc-shaped plate along the installation direction of the carbon brush, and guiding grooves capable of cooperating with the guiding edge are arranged on both sides below the cover plate.

[0008] Preferably, a limiting slot is formed on the outer surface of the cover plate, a positioning slot capable of being directly opposite to the upper limiting slot is arranged on the bottom plate, and a positioning block sequentially penetrates through the limiting slot and the positioning slot.

[0009] Preferably, the two side plates are connected by a back plate, the back plate is bent into a folded plate with a guiding groove on the outer wall, and the positioning block can be guided by the guiding groove on the outer side of the back plate.

[0010] Preferably, the wire threading groove arranged on the cover plate opens towards the outer end.

[0011] Preferably, the positioning post includes a support platform and a sleeve column installed on the support platform, and the spiral spring includes a spiral part supported by the support platform at the bottom and a horizontal part connected between the two spiral parts.

[0012] Preferably, a pin connected to the lower end of the side plate is arranged below the limiting plate, and a clamping groove capable of penetrating through the pin is arranged on the bottom plate.

[0013] The utility model has the following advantages:

[0014] By constructing the brush holder into two parts, namely a detachable limiting plate and a cover plate, on the one hand, the positioning and sleeving of the spiral spring relative to the positioning post can be directly completed in the state of opening the cover, improving the positioning and installation efficiency of the spiral spring; on the other hand, the detachable setting mode of the brush holder cooperates with the distal opening of the wire threading groove on the cover plate, making it more convenient to thread the copper wire, and improving the efficiency of carbon brush replacement as a whole. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 is a schematic diagram of the connection structure between the brush holder and the bottom plate of the utility model;

[0017] Figure 3 is a schematic diagram of the structure of the brush holder of the utility model;

[0018] Figure 4 is a schematic diagram of the sleeving structure of the spiral spring of the utility model;

[0019] Figure 5 is a schematic diagram of the structure of the limiting plate below the brush holder of the utility model;

[0020] Figure 6This is a schematic structural diagram of the upper cover plate of the brush holder of the present utility model;

[0021] Figure 7 This is a partial sectional structural diagram of the brush holder of the present utility model.

[0022] In the figure:

[0023] 1 - carbon brush holder; 2 - bottom plate; 201 - positioning slot; 202 - card slot; 3 - brush holder; 4 - positioning post; 401 - support platform; 402 - sleeve post; 5 - carbon brush; 6 - helical spring; 601 - horizontal part; 602 - helical part; 7 - copper wire; 8 - positioning block;

[0024] 301 - limit plate; 302 - cover plate; 303 - wire slot; 304 - pin; 305 - limit slot; 306 - side plate; 307 - back plate; 308 - positioning notch; 309 - arc plate; 310 - guiding rib; 311 - guiding groove. Specific embodiments

[0025] In order to make the technical means, creative features, achieved purposes and effects of the present utility model easy to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0026] As Figures 1 to 7 shown, the present utility model provides a brush installation structure for an air compressor motor, including a carbon brush holder 1, a bottom plate 2 installed on the carbon brush holder 1, and a brush holder 3 detachably installed on the bottom plate 2. An installation opening for sleeving a carbon brush 5 is provided inside the brush holder 3. Two positioning posts 4 located on both sides of the brush holder 3 are provided on the surface of the bottom plate 2, and a helical spring 6 is sleeved between the two positioning posts 4.

[0027] The brush holder 3 includes a limit plate 301 and a cover plate 302 detachably installed on the limit plate 301. Specifically:

[0028] A guiding rib 310 is provided along the installation direction of the carbon brush 5 above the side plate 306 located outside the arc plate 309, and guiding grooves 311 capable of cooperating with the guiding rib 310 are provided on both sides below the cover plate 302. The guiding rib 310 can provide guidance for the installation of the cover plate 302 and improve the smoothness of the installation between the limit plate 301 and the cover plate 302. Preferably, the cover plate 302 is installed from the inside to the outside of the limit plate 301. A limit groove for limiting the distal part of the brush holder 3 is provided on the inner wall of the carbon brush holder 1, and the limit groove can improve the positioning and installation efficiency of the brush holder 3.

[0029] To achieve the positioning of the cover plate 302 relative to the limit plate 301: a limit slot 305 is provided on the outer surface of the cover plate 302, a positioning slot 201 is provided on the bottom plate 2 and is directly opposite to the upper limit slot 305, and a positioning block 8 sequentially penetrates through the limit slot 305 and the positioning slot 201.

[0030] A wire threading groove 303 is provided on the cover plate 302, and a copper wire 7 connected to the carbon brush 5 passes through the wire threading groove 303 and is connected to the carbon brush holder 1. In the embodiment of the present invention, the wire threading groove 303 provided on the cover plate 302 opens outwards, and the opening part facilitates the threading of the copper wire 7 on the cover plate 302, and the copper wire 7 can be directly clamped into the wire threading groove 303 from one side of the cover plate 302.

[0031] The limit plate 301 includes two side plates 306 arranged opposite to each other. The outer sides of the two side plates 306 are connected by a back plate 307, and the back plate 307 is bent into a folded plate with a guiding groove on the outer wall. The positioning block 8 can be guided by the guiding groove on the outer side of the back plate 307, which can improve the installation and positioning efficiency of the positioning block 8 between the limit slot 305 and the positioning slot 201.

[0032] Moreover, a pin 304 connected to the lower end of the side plate 306 is provided below the limit plate 301, and a slot 202 capable of penetrating the pin 304 is provided on the bottom plate 2.

[0033] An arc-shaped plate 309 bent inwards is installed on the outer wall of the inner end of the side plate 306. In the prior art, a positioning notch 308 opening inwards is provided in the middle of the front end of the side plate 306, and the arc-shaped plate 309 is bent from the inside of the positioning notch 308.

[0034] Moreover, the arc-shaped plate 309 corresponds to the positioning post 4. The positioning post 4 includes a support platform 401 and a sleeve post 402 installed on the support platform 401. The spiral spring 6 includes a spiral part 602 supported by the support platform 401 at the bottom and a horizontal part 601 connecting between the two spiral parts 602.

[0035] When replacing the carbon brush in the present invention:

[0036] Pull out the positioning block 8 from the limit slot 305, slide the cover plate 302 out of the limit plate 301, and take out the carbon brush 5 in the brush holder 3 and the spiral spring 6 sleeved between the positioning posts 4.

[0037] When replacing the new carbon brush 5, vertically fit the helical portions 602 at both ends of the helical spring 6 onto the sleeve posts 402 on both sides, and the bottom of the helical portion 602 is supported by the support table 401. Then, insert the copper wire 7 connected to the carbon brush 5 into the wire groove 303 from the distal end of the cover plate 302, and align the guide groove 311 on the cover plate 302 with the guide rib 310 above the limit plate 301, and slide the cover plate 302 relative to the limit plate 301 and align them.

[0038] After that, insert the positioning block 8 along the limit slot 305 on the cover plate 302. Under the guiding action of the guiding groove constructed on the outer wall of the back plate 307, the lower end of the positioning block 8 is inserted into the positioning slot 201 on the bottom plate 2, completing the fixation of the cover plate 302 relative to the bottom plate 2 and the limit plate 301.

[0039] Finally, insert the carbon brush 5 into the installation opening at the front end of the brush holder 3, and weld the copper wire 7 connected to the carbon brush 5 at the corresponding position on the carbon brush holder 1. Thus, the replacement of the carbon brush is completed.

[0040] In this utility model, the brush holder 3 is configured into two parts, namely, the detachable limit plate 301 and the cover plate 302. On the one hand, the positioning and fitting of the helical spring 6 relative to the positioning post 4 can be directly completed in the open state, improving the positioning and installation efficiency of the helical spring 6; on the other hand, the detachable setting mode of the brush holder and the distal opening of the wire groove 303 on the cover plate 302 facilitate the threading of the copper wire 7, improving the overall efficiency of carbon brush replacement.

[0041] Although the present utility model has been described in detail with general descriptions and specific embodiments above, based on the present utility model, some modifications or improvements can be made, which are obvious to those skilled in the art. Therefore, these modifications or improvements made without departing from the spirit of the present utility model all fall within the scope of protection required by the present utility model.

Claims

1. A brush mounting structure for an air compressor motor, characterized in that: The carbon brush holder (1) comprises a carbon brush holder (1), a base plate (2) mounted on the carbon brush holder (1), and a brush holder (3) detachably mounted on the base plate (2); an installation opening for mounting a carbon brush (5) is provided on the inner side of the brush holder (3); two positioning columns (4) are arranged on the surface of the base plate (2) and are located on both sides of the brush holder (3); a coil spring (6) is mounted between the two positioning columns (4); the brush holder (3) comprises a limit plate (301) and a spring (6) detachably mounted on the limit plate (301). A cover plate (302) on the positioning plate (301), the cover plate (302) being provided with a wire threading groove (303), the copper wire (7) connected to the carbon brush (5) passing through the wire threading groove (303) and connected to the carbon brush holder (1), the limiting plate (301) comprising two side plates (306) arranged opposite to each other, the inner end outer wall of the side plate (306) being provided with an arc plate (309) bent inwardly, the arc plate (309) corresponding to the positioning column (4).

2. A brush mounting structure for an air compressor motor according to claim 1, characterized in that: A guide edge (310) is provided above the side plate (306) located outside the arc plate (309) along the installation direction of the carbon brush (5), and guide grooves (311) capable of cooperating with the guide edge (310) are provided on both sides below the cover plate (302).

3. The brush mounting structure for an air compressor motor according to claim 1, characterized in that: The outer surface of the cover plate (302) is provided with a limiting slot (305), the bottom plate (2) is provided with a positioning slot (201) that can be directly opposite to the limiting slot (305) above, and a positioning block (8) sequentially passes through the limiting slot (305) and the positioning slot (201).

4. A brush mounting structure for an air compressor motor according to claim 3, characterized in that: The outer sides of the two side plates (306) are connected via a back plate (307), and the back plate (307) is bent into a folded plate with a guide groove on the outer wall, and the positioning block (8) can be guided by the guide groove on the outer side of the back plate (307).

5. The brush mounting structure for an air compressor motor according to claim 1, characterized in that: The threading groove (303) provided on the cover plate (302) is open toward the outer end.

6. The brush mounting structure for an air compressor motor according to claim 1, characterized in that: The positioning column (4) comprises a support platform (401) and a sleeve column (402) mounted on the support platform (401); the coil spring (6) comprises a coil portion (602) whose bottom is supported by the support platform (401) and a horizontal portion (601) connected between the two coil portions (602).

7. A brush mounting structure for an air compressor motor according to claim 1, characterized in that: A plug pin (304) connected to the lower end of the side plate (306) is provided below the limiting plate (301), and a slot (202) capable of penetrating the plug pin (304) is provided on the bottom plate (2).

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