A slip ring for high-speed ranging

Abstract

The present invention belongs to the field of coaxial dual-rotor unmanned aerial vehicles and relates to a slip ring for high-speed distance measurement. It adopts an integrated structure and cleverly uses adjusting shims to correct the assembly clearance, achieving reliable fixation of the inner and outer rings of the bearings. At the same time, the integrated structure of the shaft ensures the dimensional and positional accuracy of the two bearings. The stator achieves circumferential stopping by means of a spline, and the rotor is fixed to the rotor structure by bolts, ensuring the smooth rotation of the slip ring. The cable and the brush box have good maintainability and can be disassembled and replaced at any time. This device can achieve precise distance measurement by relying on the distance signal transmitted by the slip ring to adjust the relative distance between the upper and lower rotors, preventing accidents of mutual impact caused by the coincidence of the rotation planes of the upper and lower rotors and realizing the stable flight of the unmanned aerial vehicle, having great practical application value. In addition, compared with traditional high-speed slip rings, it has high reliability, is convenient for installation and disassembly, has good maintainability, and uses relatively advanced brush and conductive ring materials to ensure the stability of the transmission performance.

Description

Technical Field

[0001] The present invention belongs to the field of coaxial dual-rotor unmanned aerial vehicles and relates to a slip ring for high-speed distance measurement. Background Art

[0002] In traditional coaxial dual-rotor unmanned aerial vehicles, accidents often occur where the rotating surfaces of the upper and lower rotors coincide and cause mutual collisions. It is necessary to measure the distance between the upper and lower rotors in a timely manner. According to the distance signal, the relative distance between the upper and lower rotors can be adjusted in a timely manner to achieve the stable flight of the unmanned aerial vehicle, which has great practical application value. In addition, compared with traditional high-speed slip rings, this slip ring adopts an integrated structure, which has higher reliability than traditional split slip rings, is convenient for installation and disassembly, has good maintainability, and has good transmission stability. Summary of the Invention

[0003] The object of the present invention is to provide a slip ring that can rotate at high speed and accurately transmit the distance signal between the upper and lower rotors.

[0004] Technical Solution

[0005] A slip ring for high-speed distance measurement includes a stator and a rotor part. Among them, the stator includes a brush box 1, a pressing plate A 2, a shaft 3, an adjusting gasket 5, and a pressing plate B 7. Among them, the shaft 3 is installed at the top of the coaxial dual-rotor unmanned aerial vehicle through a spline. The brush box 1 is fixed on the mounting surface of the lower housing of the shaft 3. On one side of the shaft 3 close to the rotor, there is a bearing A 4, and on the other side of the shaft 3, there is a bearing B 6. The pressing plate A 2 is used to fix the inner ring of the bearing A 4, and the pressing plate B 7 is used to fix the inner ring of the bearing B 6. The adjusting gasket 5 is installed between the bearing B 6 and the shaft 3; the rotor includes a gland 8, a conductive ring assembly 9, and a base 11. The conductive ring assembly 9 is installed inside the base 11 to form an integral structure. The integral structure is integrally fixed by the screws of the gland 8, and the base 11 is fixed on the rotor structure through bolts, so that the rotor assembly can rotate with the rotor, accurately transmit the distance signal between the rotors, and the stator and the rotor realize high-speed and stable rotation through the bearing A 4 and the bearing B 6.

[0006] It further includes a connector 10, and the connector 10 is arranged on the side wall of the base 11 and is used to connect with the distance measurement device on the blade.

[0007] The material of the adjusting gasket 5 is stainless steel material, which ensures reliable contact between the rotor and the outer ring of the bearing A 4 and realizes the fixation of the outer ring of the bearing A 4.

[0008] The brush box 1 of the stator of the device can be replaced at any time according to the wear condition of the brush.

[0009] Relying on the shaft 3 of the stator being an integral structure, the stator realizes circumferential stopping by the spline; at the same time, the coaxiality accuracy of the bearing A 4 and the bearing B 6 is ensured.

[0010] The rotor of the device is connected to the cable of the on-board rotor by a connector 10, and a double O-ring seal is used at the slip ring fixing structure.

[0011] The brushes in the brush box 1 are made of silver-carbon brushes.

[0012] The pressure plate A2 and the pressure plate B7 are made of stainless steel and fixed on the shaft 3 by screws, respectively ensuring the reliable fixation of the inner rings of the bearing A4 and the bearing B6.

[0013] The slip rings of the slip ring assembly 9 are made of silver-copper-nickel alloy.

[0014] Technical effects

[0015] A slip ring for high-speed ranging according to the present invention adopts an integral structure, and cleverly uses adjustment gaskets to correct the assembly gap, realizing the reliable fixation of the inner and outer rings of the bearing. At the same time, the integral structure of the shaft ensures the dimensional and positional accuracy of the two bearings. The stator is axially stopped by a spline, and the rotor is fixed on the rotor structure by bolts, ensuring the smooth rotation of the slip ring; the cable and the brush box have good maintainability and can be disassembled and replaced at any time. This device can rely on the distance signal transmitted by the slip ring to achieve accurate ranging, adjust the relative distance between the upper and lower rotors, prevent accidents caused by the coincidence of the rotation planes of the upper and lower rotors, and realize the stable flight of the UAV, having great practical application value. In addition, compared with the traditional high-speed slip ring, this slip ring adopts an integral structure, which is more reliable than the traditional split slip ring, convenient for installation and disassembly, and has good maintainability. The use of advanced brush and slip ring materials ensures the stability of the transmission performance. Description of the drawings

[0016] Figure 1 is a schematic structural diagram of a slip ring for high-speed ranging according to the present invention;

[0017] Among them, 1 - brush box, 2 - pressure plate A, 3 - shaft, 4 - bearing A, 5 - adjustment gasket, 6 - bearing B, 7 - pressure plate B, 8 - gland, 9 - slip ring assembly, 10 - connector, 11 - base.

[0018] Figure 2 is a three-dimensional model diagram of the present invention. Specific embodiments

[0019] The present invention will be further described below in conjunction with embodiments. The following only describes some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present invention.

[0020] The following further describes the specific implementation of the present invention in conjunction with the accompanying drawings.

[0021] The present invention provides a slip ring that rotates at a high speed and can accurately transmit the distance signal between the upper and lower rotors. It is installed on a coaxial double-rotor unmanned aerial vehicle (UAV). By transmitting the distance signal through the slip ring, the positional relationship between the double rotors is adjusted to ensure the flight safety of the coaxial double-rotor UAV. Compared with the traditional high-speed slip ring, this slip ring adopts an integrated structure, which has higher reliability than the traditional split slip ring; compared with the traditional coaxial double-rotor UAV, this device can achieve accurate ranging by relying on the distance signal transmitted by the slip ring, adjust the relative distance between the upper and lower rotors, prevent the accident of mutual impact caused by the coincidence of the rotation planes of the upper and lower rotors, realize the stable flight of the UAV, and has great practical application value.

[0022] Figure 1 It is a structural sectional view showing the slip ring of the present invention that rotates at a high speed and can accurately transmit the distance signal between the upper and lower rotors. As Figure 1 shown, a high-speed ranging slip ring of the present invention mainly consists of two parts: a stator and a rotor. Its principle is to transmit signals by the sliding of the carbon brushes on the conductive rings, so as to realize the transmission of current and signals from the fixed end to the rotating end, achieve accurate ranging by relying on the distance signal transmitted by the slip ring, and at the same time, the structure of this device is simple and has good maintainability. The stator of the device of the present invention is composed of a carbon brush box (1), a pressing plate A (2), a shaft (3), an adjusting gasket (5), and a pressing plate B (7); the rotor of the device is composed of a gland (8), a conductive ring assembly (9), a connector (10), and a base (11).

[0023] Figure 2 It is a three-dimensional model diagram of a high-speed ranging slip ring. The 4 connectors (10) of the slip ring rotor are respectively connected to 4 rotor blades to measure the distance between the double-layer rotor blades.

[0024] A high-speed ranging slip ring of the present invention corresponds to 6 conductive rings and 6 corresponding groups of carbon brushes, which are used to transmit distance control signals, and the current transmitted by each path is not less than 2 amperes. The electrical connection between the stator (carbon brush box (1), pressing plate A (2), shaft (3), adjusting gasket (5), pressing plate B (7)) and the rotor (gland (8), conductive ring assembly (9), connector (10), base (11), etc.) is mainly realized through the mechanical structure. During operation, the stator realizes circumferential stop through the spline on the shaft (3), so that the stator is relatively fixed with the main rotor shaft, and the rotor is fixed on the rotor structure by bolts and rotates with the UAV rotor. It can achieve accurate ranging by relying on the distance signal transmitted by the slip ring.

[0025] Slip ring for high-speed ranging, characterized in that it includes a stator and a rotor part. Among them, the stator includes a brush box (1), a pressing plate A (2), a shaft (3), an adjusting gasket (5), and a pressing plate B (7). Among them, the shaft (3) is installed at the top of a coaxial double-rotor unmanned aerial vehicle through a spline. The brush box (1) is fixed on the mounting surface of the lower housing of the shaft (3). A bearing A (4) is provided on one side of the shaft (3) close to the rotor, and a bearing B (6) is provided on the other side of the shaft (3). The pressing plate A (2) is used to fix the inner ring of the bearing A (4), and the pressing plate B (7) is used to fix the inner ring of the bearing B (6). The adjusting gasket (5) is installed between the bearing B (6) and the shaft (3). The rotor includes a gland (8), a slip ring assembly (9), and a base (11). The slip ring assembly (9) is installed inside the base (11) to form an integral structure. The integral structure is integrally fixed by the screws of the gland (8) to the gland (8), the slip ring assembly (9), and the base (11). The base (11) is fixed to the rotor structure by bolts, so that the rotor assembly can rotate with the rotor, accurately transmitting the distance signal between the rotors. The stator and the rotor achieve high-speed and stable rotation through the bearing A (4) and the bearing B (6).

[0026] It also includes a connector (10). The connector (10) is arranged on the side wall of the base (11) and is used to connect with the ranging device on the blade. It is convenient for installation and disassembly and has good maintainability. The material of the adjusting gasket (5) is made of stainless steel to ensure reliable contact between the rotor and the outer ring of the bearing A (4) and realize the fixation of the outer ring of the bearing A (4). The brush box (1) of the stator of the device can be replaced at any time according to the wear condition of the brush, and it has good maintainability. Relying on the shaft (3) of the stator being an integral structure, the stator realizes circumferential stop by spline and does not require circumferential fixation; at the same time, it ensures the accuracy of the coaxiality of the bearing A (4) and the bearing B (6). The rotor of the device uses the connector (10) to connect with the cable of the rotor on the aircraft. The fixed structure of the slip ring uses a double O-ring seal to prevent water from entering the slip ring. The brush of the brush box (1) uses a silver-carbon brush, which has better transmission stability than the traditional copper-carbon brush, and will not generate cuprous oxide and carbon powder oxide film with semiconductor characteristics, that is, the contact resistance will not jump. The contact resistance between the brush and the slip ring is stable. The pressing plate A (2) and the pressing plate B (7) are made of stainless steel and are fixed on the shaft (3) by screws, respectively ensuring the reliable fixation of the inner rings of the bearing A (4) and the bearing B (6). The slip ring of the slip ring assembly (9) uses a silver-copper-nickel alloy

[0027] Those skilled in the art can understand that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as the general understanding of those of ordinary skill in the art to which the present invention pertains. It should also be understood that terms such as those defined in a general dictionary should be understood to have a meaning consistent with their meaning in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless defined as such here. The specific embodiments described above have further elaborated on the purpose, technical solutions, and beneficial effects of the present invention. It should be understood that the above is only the specific embodiment of the present invention and is not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A current collector ring for high-speed ranging, characterized in that It includes a stator and a rotor part. Among them, the stator includes a brush box, a pressure plate A, a shaft, an adjusting gasket, a pressure plate B, and a connector. The shaft is installed at the top of the coaxial dual-rotor unmanned aerial vehicle through a spline. The brush box is fixed on the mounting surface of the lower housing of the shaft. There is a bearing A on one side of the shaft close to the rotor, and a bearing B on the other side of the shaft. The pressure plate A is used to fix the inner ring of the bearing A, the pressure plate B is used to fix the inner ring of the bearing B, and the adjusting gasket is installed between the bearing B and the shaft; the rotor includes a gland, a slip ring assembly, and a base. The slip ring assembly is installed inside the base to form an integral structure. The integral structure realizes the overall fixation of the gland, the slip ring assembly, and the base through the screws of the gland. The base is fixed on the rotor structure through bolts, so that the rotor assembly can rotate with the rotor, accurately transmit the distance signal between the rotors, and the stator and the rotor achieve high-speed and stable rotation through the bearing A and the bearing B; the connector is arranged on the side wall of the base and is used to connect with the ranging device on the blade; relying on the shaft of the stator being an integral structure, the stator realizes circumferential stopping by the spline; at the same time, the accuracy of the coaxiality of the bearing A and the bearing B is ensured.

2. The current collector ring for high-speed ranging according to claim 1, characterized in that, The adjusting gasket is made of stainless steel material to ensure reliable contact between the rotor and the outer ring of the bearing A and realize the fixation of the outer ring of the bearing A.

3. The current collector ring for high-speed ranging according to claim 1, characterized in that, The brush box can be replaced at any time according to the wear condition of the brush.

4. The current collector ring for high-speed ranging according to claim 1, characterized in that, The connector is connected to the cable of the rotor on the aircraft, and a double O-ring seal is adopted at the fixed structure of the slip ring.

5. A current collector ring for high-speed ranging according to claim 1, characterized in that, The brush of the brush box adopts a silver-carbon brush.

6. The current collector ring for high-speed ranging according to claim 1, characterized in that, The pressure plate A and the pressure plate B are made of stainless steel material and are fixed on the shaft by screws, respectively ensuring the reliable fixation of the inner rings of the bearing A and the bearing B.

7. The current collector ring for high-speed ranging according to claim 1, characterized in that, The slip ring of the slip ring assembly adopts a silver-copper-nickel alloy.

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