Grounding brush device
By adjusting the screw to move the threaded seat and contact brush, the problem of improper force adjustment at the contact point in the grounding brush device is solved, realizing static electricity discharge and stable motor operation, facilitating maintenance, and avoiding motor damage and electrostatic interference.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU MINWEI ELECTRIC CARBON TECH CO LTD
- Filing Date
- 2025-08-20
- Publication Date
- 2026-07-21
AI Technical Summary
In existing grounding brush devices, the force at the contact point cannot be effectively adjusted. If it is too tight, it increases the resistance to the rotation of the motor shaft and causes damage after long-term use. If it is too loose, it cannot make stable contact, cannot effectively discharge static electricity, and still has static interference.
A grounding brush device was designed. By adjusting the screw, the threaded seat and contact brush are moved to adjust the force at the contact point. Combined with the vent and filter components, static electricity is discharged and the device is maintained, which facilitates component repair.
It effectively adjusts the force on the contact points, reduces electrostatic interference, ensures stable motor operation, prevents excessive temperature from affecting component performance, and facilitates maintenance and repair.
Smart Images
Figure CN224537982U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of motor brush technology, and in particular to a grounding brush device. Background Technology
[0002] Grounding brushes are conductive components used in rotating equipment such as motors and generators. They are made of graphite and metallic graphite composite materials and are installed between the rotating shaft and the grounding device. By sliding contact with the shaft surface, they conduct the static electricity and stray current accumulated on the shaft to the ground, preventing charge breakdown of insulation and interference with equipment operation. At the same time, they can protect bearing components from electrochemical corrosion.
[0003] When rotating equipment is running, the shaft system generates static electricity and stray current due to friction and electromagnetic induction. If not released, these can puncture the bearing lubrication film, creating electric sparks and causing bearing wear. Static electricity accumulation can also interfere with electronic components, posing safety hazards. Grounding brushes conduct current to the ground through sliding contact, preventing equipment damage and are a key device for ensuring stable equipment operation.
[0004] When a motor is running, static electricity is generated due to electromagnetic conversion and component friction inside the motor. When too much static electricity accumulates, it can interfere with the normal operation of the motor and damage internal components. In the existing technology, grounding brushes are used to discharge static electricity, avoiding the adverse effects caused by static electricity accumulation and ensuring the basic operational safety of the motor. However, in actual use, the force on the contact point of the brush cannot be effectively adjusted. If it is too tight, it will increase the resistance to the rotation of the motor shaft and cause damage to the motor in the long run. If it is too loose, it will not be able to make stable contact with the motor shaft and will not be able to effectively discharge static electricity, and the problem of static interference will still exist. Utility Model Content
[0005] To overcome the above shortcomings, this utility model provides a grounding brush device, which aims to improve the problem that the contact point force of the brush in the prior art cannot be effectively adjusted. If it is too tight, it will increase the rotational resistance of the motor shaft and cause damage to the motor in the long term. If it is too loose, it will not be able to make stable contact with the motor shaft and will not be able to effectively discharge static electricity, and there will still be problems with static interference.
[0006] To achieve the above objectives, the present invention adopts the following technical solution: a grounding brush device, including a motor housing, a motor shaft rotatably connected inside the motor housing, a grounding mechanism provided on the front side of the motor housing, the grounding mechanism being used to release static electricity inside the motor, and a maintenance mechanism provided on the front side of the grounding mechanism, the maintenance mechanism being used to facilitate maintenance of the grounding structure; The grounding mechanism includes a grounding shell, the rear side of which is fixedly connected to the front side of the motor housing. Multiple bearings are fixedly connected to the outer wall of the grounding shell. Adjusting screws are fixedly connected to the inner walls of the multiple bearings. Threaded seats are threaded between adjacent adjustment screws. Contact brushes are fixedly connected between adjacent threaded seats. Fixing components are provided on the front and rear sides of the multiple threaded seats. An external component is provided on the top front side of the grounding shell. Conductive components are provided on the opposite sides of the multiple threaded seats.
[0007] As a further description of the above technical solution: The maintenance mechanism includes a cover, the rear side of which is located on the front side of the grounding shell. The front side of the cover has multiple ventilation holes. A rubber ring is fixedly connected to the rear side of the cover. A fixing groove is provided on the front side of the grounding shell. A filter assembly is provided on the front side of the cover. A locking assembly is provided on both the left and right ends of the front side of the cover. A rotating assembly is provided on the bottom front side of the grounding shell.
[0008] As a further description of the above technical solution: The conductive component includes multiple solder pads, which are respectively fixedly connected to each other on the opposite side of multiple threaded seats, and each opposite side of the multiple solder pads is fixedly connected with a wire.
[0009] As a further description of the above technical solution: The external component includes a metal ring, the outer wall of which is fixedly connected to the inner front end of the grounding shell, a clip is fixedly connected to the top of the grounding shell, and a terminal block is fixedly connected to the top right side of the grounding shell.
[0010] As a further description of the above technical solution: The fixing assembly includes multiple slide bars, which are respectively fixedly connected to the front and rear sides of multiple threaded seats. Multiple fixing brackets are fixedly connected to the inner wall of the grounding shell.
[0011] As a further description of the above technical solution: The filter assembly includes a steel mesh, the rear side of which is fixedly connected to the front side of the cover, and the front side of the steel mesh is threaded with multiple bolts.
[0012] As a further description of the above technical solution: The rotating assembly includes a rotating base, the top of which is fixedly connected to the bottom front side of the grounding shell, and a rotating shaft is fixedly connected to the inner side of the rotating base.
[0013] As a further description of the above technical solution: The locking assembly includes two buckles, which are fixedly connected to the left and right ends of the front side of the cover, respectively. The grounding shell has slots on both the left and right sides.
[0014] This utility model has the following beneficial effects: 1. In this utility model, the bearing supports the adjustment screw to rotate, and the rotation of the adjustment screw drives the threaded seat to move. The contact brush contacts the motor shaft, realizing the grounding and conduction of the motor shaft. The distance of the brush is adjusted by adjusting the screw, thereby controlling the force on the contact point and avoiding the problem of the contact point being too tight or too loose. This effectively discharges static electricity and reduces static interference.
[0015] 2. In this utility model, the opening and closing of the cover facilitates the maintenance of internal components. The vent holes dissipate heat from the device, preventing excessive temperature from affecting the performance of the components. When the cover is on, the rubber ring is locked into the fixing groove, enhancing the sealing between the cover and the grounding shell. The fixing groove provides locking space for the rubber ring, ensuring that the rubber ring is locked securely. When the buckle is on the cover, it locks into the locking groove, ensuring that the cover will not loosen during use. Attached Figure Description
[0016] Figure 1 This is a perspective view of a grounding brush device proposed in this utility model; Figure 2 This is an exploded view of the maintenance mechanism in a grounding brush device proposed in this utility model; Figure 3 This is an exploded view of the cover in a grounding brush device proposed in this utility model; Figure 4 This is an exploded view of the grounding mechanism in a grounding brush device proposed in this utility model; Figure 5 This is an exploded view of the fixing component in a grounding brush device proposed in this utility model.
[0017] Legend: 1. Motor housing; 2. Motor shaft; 3. Grounding mechanism; 301. Grounding shell; 302. Bearing; 303. Adjusting screw; 304. Threaded seat; 305. Contact brush; 306. Conductive component; 3061. Welding base; 3062. Wire; 307. External component; 3071. Metal ring; 3072. Clip; 3073. Terminal block; 308. Fixing component; 3081. Sliding bar; 3082. Fixing bracket; 4. Maintenance mechanism; 401. Cover; 402. Vent hole; 403. Rubber ring; 404. Fixing groove; 405. Snap-fit component; 4051. Buckle; 4052. Slot; 406. Filter component; 4061. Steel mesh; 4062. Bolt; 407. Rotating component; 4071. Rotary seat; 4072. Rotating shaft. Detailed Implementation
[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0019] Reference Figure 1 , Figure 4 and Figure 5 An embodiment of this utility model is provided: a grounding brush device, including a motor housing 1, a motor shaft 2 rotatably connected inside the motor housing 1, a grounding mechanism 3 provided on the front side of the motor housing 1, the grounding mechanism 3 is used to release static electricity inside the motor, and a maintenance mechanism 4 is provided on the front side of the grounding mechanism 3, the maintenance mechanism 4 is used to facilitate maintenance of the grounding structure. The grounding mechanism 3 includes a grounding shell 301, the rear side of which is fixedly connected to the front side of the motor housing 1. Multiple bearings 302 are fixedly connected to the outer wall of the grounding shell 301, and the outer rings of the bearings 302 are fixedly connected to the grounding shell 301. Adjusting screws 303 are fixedly connected to the inner walls of the multiple bearings 302. The top of the outer wall of the adjusting screws 303 is fixedly connected to the inner rings of the bearings 302. Threaded seats 304 are threadedly connected between adjacent adjusting screws 303. The threads at the bottom of the adjusting screws 303 are screwed into the threaded seats 304. Rotating the adjusting screws 303 drives the threaded seats 304 to move. Contact brushes 305 are fixedly connected between adjacent threaded seats 304. When the threaded seats 304 move, the contact brushes 305 are driven to move closer to the motor shaft 2 and further away from the motor shaft 2. A fixing component 308 is provided on the front and rear sides of a plurality of threaded seats 304. The fixing component 308 includes a plurality of slide bars 3081. The slide bars 3081 form a sliding relationship with the grooves on the fixing frame 3082. When the threaded seat 304 moves, it defines the movement path and prevents it from rotating together with the adjusting screw 303. The adjacent slide bars 3081 are fixedly connected to the front and rear sides of the plurality of threaded seats 304 respectively. A plurality of fixing frames 3082 are fixedly connected to the inner wall of the grounding shell 301. The fixing frames 3082 are fixed on the inner wall of the grounding shell 301. An external component 307 is provided on the top front side of the grounding shell 301. The external component 307 includes a metal ring 3071. The outer wall of the metal ring 3071 is fixedly connected to the inner front end of the grounding shell 301. A clamp 3072 is fixedly connected to the top of the grounding shell 301. The clamp 3072 passes through the grounding shell 301 and is connected to the metal ring 3071. A terminal block 3073 is fixedly connected to the top right side of the grounding shell 301. The terminal block 3073 passes through the grounding shell 301 and is connected to the metal ring 3071. A conductive component 306 is provided on the opposite side of the multiple threaded seats 304. The conductive component 306 includes multiple solder seats 3061. The solder seats 3061 are used to connect the wires 3062 and the contact brush 305. The multiple solder seats 3061 are fixedly connected to each other on the opposite side of the multiple threaded seats 304. A wire 3062 is fixedly connected to the opposite side of the multiple solder seats 3061. The wire 3062 is connected to the metal ring 3071. Specifically, the grounding housing 301 provides the installation foundation to ensure structural stability. The bearing 302 supports the rotation of the adjusting screw 303, reducing friction during its rotation. The rotation of the adjusting screw 303 drives the threaded seat 304 to move, adjusting the position of the contact brush 305. The threaded seat 304 moves the contact brush 305, allowing it to move closer to or further away from the motor shaft 2. The contact brush 305 then contacts the motor shaft 2, achieving grounding conductivity for the motor shaft 2. The slide bar 3081 slides within the groove of the fixing bracket 3082, limiting the movement path of the threaded seat 304 and preventing the threaded seat 304 from moving away from the motor shaft 2. As the adjusting screw 303 rotates, the fixing bracket 3082 provides a sliding track for the slider 3081, ensuring the slider 3081 slides stably; the metal ring 3071 connects each wire 3062 to realize the concentrated conduction of current; the clamp 3072 fixes the position of the metal ring 3071 to prevent the metal ring 3071 from loosening; the terminal block 3073 connects to the external grounding wire to provide a path for the grounding current; the welding base 3061 fixes the wire 3062 and the contact brush 305 to ensure smooth current conduction; the wire 3062 conducts the current of the contact brush 305 to the metal ring 3071, realizing the transmission of current.
[0020] Reference Figure 1 , Figure 2 and Figure 3The maintenance mechanism 4 includes a cover 401, which is opened and closed by a rotating assembly 407. The rear side of the cover 401 is located on the front side of the grounding shell 301. The front side of the cover 401 has multiple ventilation holes 402 to prevent the internal friction of the device from generating heat and causing the temperature to be too high. A rubber ring 403 is fixedly connected to the rear side of the cover 401. When the cover 401 is closed, the rubber ring 403 is locked into a fixing groove 404. The front side of the grounding shell 301 has a fixing groove 404. A filter assembly 406 is provided on the front side of the cover 401. The filter assembly 406 includes a steel mesh 4061. The steel mesh 4061 covers the ventilation holes 402 of the cover 401 to prevent dust from entering the device. The rear side of the steel mesh 4061 is fixedly connected to the front side of the cover 401. Multiple bolts 4062 are threadedly connected to the front side of the steel mesh 4061 to fix the steel mesh 4061 to the cover 401. The front left and right sides of the cover 401 are provided with locking components 405. The locking components 405 include two buckles 4051. When the cover 401 is closed, the buckles 4051 lock into the slots 4052 to prevent the cover 401 from loosening. The two buckles 4051 are fixedly connected to the front left and right sides of the cover 401 respectively. The grounding shell 301 is provided with slots 4052 on both the left and right sides. The bottom front side of the grounding shell 301 is provided with a rotating component 407. The rotating component 407 includes a rotating base 4071. The top of the rotating base 4071 is fixedly connected to the bottom front side of the grounding shell 301. The inner side of the rotating base 4071 is fixedly connected to a rotating shaft 4072. The cover 401 is opened and closed by rotating through the rotating shaft 4072. Specifically, the cover 401 is opened and closed via a rotating assembly 407, facilitating maintenance of internal components. The vent 402 dissipates heat from the device, preventing overheating from affecting component performance. When the cover 401 is closed, the rubber ring 403 engages with the fixing groove 404, enhancing the seal between the cover 401 and the grounding shell 301. The fixing groove 404 provides engagement space for the rubber ring 403, ensuring a secure engagement. A steel mesh 4061 covers the vent 402 of the cover 401, preventing dust from entering the device. Bolt 4062 fixes the steel mesh 4061 to the cover 401 to prevent the steel mesh 4061 from falling off. When the cover 401 is closed, the buckle 4051 engages with the slot 4052 to ensure that the cover 401 will not loosen during use. The slot 4052 provides a locking position for the buckle 4051 to ensure that the buckle 4051 is reliably engaged. The swivel base 4071 provides installation support for the rotating shaft 4072 to ensure that the rotating shaft 4072 works stably. The rotating shaft 4072 supports the rotation of the cover 401, making the opening and closing of the cover 401 smooth.
[0021] Working principle: Through the rotating component 407 of the maintenance mechanism 4, the rotating shaft 4072 supported by the rotating seat 4071 rotates, opening the cover 401 and exposing the internal components of the grounding mechanism 3. Then, the adjusting screw 303 on the outer wall of the grounding shell 301 is rotated. The adjusting screw 303 rotates in the bearing 302. Because the adjusting screw 303 is threadedly connected to the threaded seat 304, it will drive the threaded seat 304 to move. At this time, in the fixing components 308 on the front and rear sides of the threaded seat 304, the slide bar 3081 is in the fixing frame 3. Sliding within the groove of 082 limits the movement path of the threaded seat 304, preventing it from rotating with the adjusting screw 303 until the contact brush 305 moves to the position of contacting the motor shaft 2. After that, the cover 401 is closed. In the locking assembly 405 on the front side of the cover 401, the buckle 4051 will be locked into the locking groove 4052 on the left and right sides of the grounding shell 301 to fix the cover 401. At the same time, the rubber ring 403 on the rear side of the cover 401 is locked into the fixing groove 404 on the front side of the grounding shell 301 to enhance the sealing effect. When the motor is running, the static electricity generated by the motor shaft 2 will be conducted through the contact brush 305 to the welding seat 3061 on the side away from the threaded seat 304, and then transmitted through the wire 3062 of the conductive component 306 to the metal ring 3071 of the external component 307. The metal ring 3071 is fixed to the inside of the grounding shell 301 by the clip 3072. The static electricity is conducted to the external grounding wire through the terminal block 3073 on the top right side of the grounding shell 301. During operation, the vent 402 on the front side of the cover 401 can dissipate internal heat. The steel mesh 4061 of the filter assembly 406 covers the vent 402 to block dust. The steel mesh 4061 is fixed to the front side of the cover 401 by bolts 4062 to prevent it from falling off. If maintenance is required, the parts can be inspected and replaced by opening the cover 401, effectively releasing the static electricity of the motor shaft 2, ensuring the safe operation of the motor, facilitating maintenance, and ensuring long-term stable operation.
[0022] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A grounding brush device, comprising a motor housing (1), characterized in that: The motor housing (1) is rotatably connected to the motor shaft (2). A grounding mechanism (3) is provided on the front side of the motor housing (1). The grounding mechanism (3) is used to release static electricity inside the motor. A maintenance mechanism (4) is provided on the front side of the grounding mechanism (3). The maintenance mechanism (4) is used to facilitate the maintenance of the grounding structure. The grounding mechanism (3) includes a grounding shell (301), the rear side of which is fixedly connected to the front side of the motor shell (1). Multiple bearings (302) are fixedly connected to the outer wall of the grounding shell (301). Adjusting screws (303) are fixedly connected to the inner walls of the multiple bearings (302). Threaded seats (304) are threaded between adjacent multiple adjusting screws (303). Contact brushes (305) are fixedly connected between adjacent multiple threaded seats (304). Fixing components (308) are provided on the front and rear sides of the multiple threaded seats (304). An external component (307) is provided on the top front side of the grounding shell (301). Conductive components (306) are provided on the opposite side of the multiple threaded seats (304).
2. The grounding brush device according to claim 1, characterized in that: The maintenance mechanism (4) includes a cover (401), the rear side of which is located on the front side of the grounding shell (301). The front side of the cover (401) has multiple ventilation holes (402). A rubber ring (403) is fixedly connected to the rear side of the cover (401). A fixing groove (404) is provided on the front side of the grounding shell (301). A filter assembly (406) is provided on the front side of the cover (401). A locking assembly (405) is provided on both the left and right ends of the front side of the cover (401). A rotating assembly (407) is provided on the bottom front side of the grounding shell (301).
3. The grounding brush device according to claim 1, characterized in that: The conductive component (306) includes a plurality of solder pads (3061), and the plurality of solder pads (3061) are respectively fixedly connected to the opposite side of a plurality of threaded seats (304), and each of the opposite sides of the plurality of solder pads (3061) is fixedly connected to a wire (3062).
4. A grounding brush device according to claim 1, characterized in that: The external component (307) includes a metal ring (3071), the outer wall of which is fixedly connected to the inner front end of the grounding shell (301), a clip (3072) is fixedly connected to the top of the grounding shell (301), and a terminal block (3073) is fixedly connected to the top right side of the grounding shell (301).
5. A grounding brush device according to claim 1, characterized in that: The fixing component (308) includes a plurality of slide bars (3081), which are respectively fixedly connected to the front and rear sides of a plurality of threaded seats (304), and a plurality of fixing brackets (3082) are fixedly connected to the inner wall of the grounding shell (301).
6. A grounding brush device according to claim 2, characterized in that: The filter assembly (406) includes a steel mesh (4061), the rear side of which is fixedly connected to the front side of the cover (401), and the front side of the steel mesh (4061) is threaded with a plurality of bolts (4062).
7. A grounding brush device according to claim 2, characterized in that: The rotating assembly (407) includes a rotating base (4071), the top of which is fixedly connected to the bottom front side of the grounding shell (301), and a rotating shaft (4072) is fixedly connected to the inner side of the rotating base (4071).
8. A grounding brush device according to claim 2, characterized in that: The locking assembly (405) includes two buckles (4051), which are fixedly connected to the left and right ends of the front side of the cover (401) respectively. The grounding shell (301) has a slot (4052) on both the left and right sides.