High-reliability isolation type electric brush carrier structure
By setting the rotor and stator isolation barrier on the sliding ring rotor, the insulation area and creepage distance are increased, the problem of poor insulation performance of the slip ring is solved, and the high-reliability insulation effect is achieved.
Patent Information
- Application Number
- CN202422413246.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-08
- Publication Date
- 2025-08-05
- Estimated Expiration
- 2034-10-08
AI Technical Summary
The insulation performance of conventional conductive slip rings is poor, especially in humidity, low air pressure or high voltage environments, resulting in limited slip ring reliability and application range.
A high-reliability isolation brush holder structure is designed, by setting the rotor isolation barrier and the stator isolation barrier on the sliding ring rotor, the insulator isolation area of the loop space is increased, and the creepage distance is increased by the setting of the conductive ring.
It realizes the high reliability insulation performance of the slip ring in various environments, and improves the application adaptability and reliability of the slip ring.
Smart Images
Figure CN223194187U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of conductive slip rings, in particular to the field of high-reliability slip rings and high-voltage slip rings, and specifically relates to a high-reliability isolation type brush holder structure. Background Art
[0002] Brushes are conductive components that form an electrical connection by sliding against moving parts. They are used in commutators or slip rings as the sliding contact for conducting current. They have excellent electrical and thermal conductivity and lubrication properties, as well as a certain mechanical strength and the ability to suppress commutation sparks.
[0003] Conventional conductive slip rings have axially arranged brushes, and most areas between the brush loops are not isolated by insulators, resulting in short creepage distances and poor insulation performance. In particular, the slip rings have poor insulation adaptability in humidity, low pressure or vacuum environments, and high voltage environments. This severely restricts the reliability and application range of the slip rings. Utility Model Content
[0004] The purpose of the utility model is to provide a high-reliability isolation brush holder structure to solve the problems raised in the background technology.
[0005] To achieve the above purpose, the present invention provides the following technical solutions:
[0006] A high-reliability isolated brush holder structure is based on a slip-ring rotor. The slip-ring rotor includes a slip-ring body and a plurality of annular rotor isolation gates. The rotor isolation gates are fixedly sleeved on the outer surface of the slip-ring body, and a conductive ring is provided between two adjacent rotor isolation gates. The brush holder includes a fixed plate and a stator isolation gate arranged on the fixed plate in coordination with the rotor isolation gate. The rotor isolation gates correspond one-to-one with the stator isolation gates. A stator conductive brush is provided between two adjacent stator isolation gates in coordination with the conductive ring between the two rotor isolation gates.
[0007] Preferably, the isolation fences are arranged at equal intervals.
[0008] Preferably, the rotor isolation fence includes a first connecting ring and a second connecting ring connected as one piece, the first connecting ring and the second connecting ring are coaxially arranged and have the same inner diameter, the outer diameter of the second connecting ring is smaller than the outer diameter of the first connecting ring, and the second connecting ring is arranged on the opposite side of the conductive ring.
[0009] Preferably, the interval d between two adjacent rotor isolation grids is less than twice the thickness h of the second connecting ring, and the conductive ring is mounted outside the slip ring body through the two oppositely arranged second connecting rings.
[0010] Preferably, the outer diameter of the conductive ring is smaller than the outer diameter of the first connecting ring.
[0011] Compared with the prior art, the beneficial effects of the present invention are:
[0012] In the utility model, a stator isolation grid matched with a rotor isolation grid on a slip ring body is provided on a fixed plate, so that the loop spaces of the slip ring are isolated in a larger range, thereby ensuring high reliability of isolation. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.
[0014] Figure 2 It is a side view of the present utility model.
[0015] Figure 3 for Figure 2 Schematic diagram of the cross-section structure.
[0016] Figure 4 for Figure 3 A partial enlarged view of .
[0017] Figure 5 Schematic diagram of the cross-sectional structure of the rotor isolation grid.
[0018] Figure 6 for Figure 5 A partial enlarged view of .
[0019] Description of the drawings: 1-brush holder, 11-fixed plate, 12-stator isolation grid, 13-conductive brush, 2-slip ring rotor, 21-slip ring body, 22-rotor isolation grid, 23-conductive ring, 221-first connecting ring, 222-second connecting ring. DETAILED DESCRIPTION
[0020] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0021] The utility model provides a structure of a high reliability isolated brush holder 1, which cooperates with the slip ring rotor 2 to form a conductive slip ring. Figure 1 shown.
[0022] Combine Figure 2-Figure 6As shown, the slip-ring rotor 2 includes a slip-ring body 21 and five annular rotor isolation gates 22. The central axes of the slip-ring body 21 and the rotor isolation gates 22 are the same, and the inner diameter of the rotor isolation gates 22 is consistent with the outer diameter of the slip-ring body 21. The five rotor isolation gates 22 are sleeved on the outer surface of the slip-ring body 21 at equal intervals, and the inner wall of each rotor isolation gate 22 is fixedly connected to the outer wall of the slip-ring body 21; the rotor isolation gate 22 includes a first connecting ring 221 and a second connecting ring 222 connected as a whole. The inner diameters of the first connecting ring 221 and the second connecting ring 222 are consistent with the outer diameter of the slip-ring body 21. The outer diameter of the second connecting ring 222 is smaller than the outer diameter of the first connecting ring 221 so that the conductive ring 23 is fixedly sleeved on the outer wall of the second connecting ring 222. The first connecting ring 221 is used for isolation between adjacent rings. The number of the second connecting rings 222 is one or two, and each second connecting ring 222 is arranged on the opposite side of the conductive ring 23. The interval d between two adjacent rotor isolation grids 22 is greater than twice the thickness h of the second connecting ring 222 . The conductive ring 23 is mounted outside the slip ring body 21 via the two oppositely disposed second connecting rings 222 .
[0023] The structure of the brush holder 1 includes a fixed plate 11, a stator isolation grid 12, and a conductive brush 13. The fixed plate 11 is arranged above the slip ring rotor 2. There are five stator isolation grids 12 and they correspond one-to-one to the above-mentioned five rotor isolation grids 22. The bottom of the stator isolation grid 12 is equipped with an arc groove to cooperate with the outer surface of the rotor isolation grid 22 to form a small rotation gap with the rotor isolation ring. Two symmetrically arranged stator conductive brushes 13 are arranged between each adjacent stator isolation grid 12. The stator conductive brushes 13 conflict with the conductive ring 23. When one of the stator conductive brushes 13 cannot conduct electricity, the other stator conductive brush can ensure the normal operation of the slip ring.
[0024] In the present invention, two adjacent stator isolation gates 12 cooperate with the corresponding rotor isolation gates 22 to form a loop space of the slip ring. Both the stator isolation gates 12 and the rotor isolation gates 22 use insulating materials to isolate the loop spaces of the slip ring over a large range. By increasing the insulation isolation area between the loop conductors, high insulation reliability of the slip ring is achieved.
[0025] Furthermore, the outer diameter of the conductive ring is smaller than the outer diameter of the first connecting ring. At this time, the interference position between the conductive brush and the conductive ring is between two adjacent rotor isolation gates, further increasing the creepage distance between each loop conductor, thereby achieving high insulation reliability of the slip ring.
[0026] The above-described embodiments are only preferred solutions of the present invention and are not intended to limit the present invention in any form. Other variations and modifications are possible without exceeding the technical solutions described in the claims.
Claims
1. A high reliability isolated brush holder structure based on a slip ring rotor, characterized in that: The slip ring rotor includes a slip ring body and a plurality of annular rotor isolation gates. The rotor isolation gates are fixedly sleeved on the outer surface of the slip ring body. A conductive ring is provided between two adjacent rotor isolation gates. The brush holder includes a fixed plate and a stator isolation gate provided on the fixed plate in cooperation with the rotor isolation gate. The rotor isolation gates correspond to the stator isolation gates one-to-one. A stator conductive brush is provided between two adjacent stator isolation gates in cooperation with the conductive ring between the two rotor isolation gates.
2. A high reliability isolated brush holder structure according to claim 1, characterized in that: The isolation fences are arranged at equal intervals.
3. A high reliability isolated brush holder structure according to claim 1, characterized in that: The rotor isolation fence includes a first connecting ring and a second connecting ring connected integrally. The first connecting ring and the second connecting ring are coaxially arranged and have the same inner diameter. The outer diameter of the second connecting ring is smaller than the outer diameter of the first connecting ring, and the second connecting ring is arranged on the opposite side of the conductive ring.
4. A high reliability isolated brush holder structure as claimed in claim 3, characterized in that: The interval d between two adjacent rotor isolation grids is greater than twice the thickness h of the second connecting ring, and the conductive ring is mounted outside the slip ring body through two oppositely arranged second connecting rings.
5. A high reliability isolated brush holder structure as claimed in claim 3, characterized in that: The outer diameter of the conductive ring is smaller than the outer diameter of the first connecting ring.