A multi-rotor adjustable brushless motor

Abstract

A multi-rotor adjustable speed brushless motor belongs to the technical field of brushless motors. It includes a brushless motor and a fan blade. The brushless motor is composed of a stator and a rotor. The rotor is composed of a housing and a rotating shaft. It is characterized in that: the stator can move forward and backward along the rotating shaft in the rotor. The rear end of the stator is provided with a telescopic mechanism for pushing the stator to move forward and backward along the rotating shaft in the rotor. The telescopic mechanism includes a telescopic rod and a telescopic motor for controlling the forward and backward movement of the telescopic rod. The design of the telescopic mechanism of the present invention stably solves the problem of the rotor moving forward and backward along the stator during rotation. When the distance between the rotor and the stator increases, the main magnetic flux of the air gap of the brushless motor decreases, thereby achieving the purpose of increasing the speed of the brushless motor.

Description

Technical Field

[0001] The invention belongs to the technical field of brushless motors, and in particular relates to an adjustable brushless motor for multiple rotors. Background Art

[0002] The brushless motor is a kind of flying power on the aircraft. The speed of the aircraft depends on the speed of the brushless motor. The higher the speed, the greater the flight propulsion force and the faster the flight speed. The speed of the brushless motor on the existing aircraft is controlled by adjusting the voltage and current. When the voltage and current values ​​are constant, the speed of the brushless motor basically reaches a stable state and cannot be adjusted. Therefore, when the voltage and current are constant, how to increase the speed of the brushless motor is an urgent problem to be solved by personnel in this technical field. Summary of the invention

[0003] The purpose of the present invention is to provide a multi-rotor adjustable speed brushless motor, which can increase the speed of the rotor by adjusting the distance between the stator and the rotor when the voltage and current values ​​are constant.

[0004] The above-mentioned invention object is achieved through the following technical scheme: a multi-rotor adjustable brushless motor, which includes a brushless motor and a fan blade connected to the brushless motor, the brushless motor consists of a stator and a rotor, the stator is arranged inside the rotor, the rotor consists of a shell that can rotate around the stator and a rotating shaft that penetrates the shell and is fixedly connected to the center of the shell, the fan blade is fixedly connected to the front end of the rotating shaft, and the key points are: the stator can move back and forth in the rotor along the rotating shaft, the rear end of the stator is provided with a telescopic mechanism that pushes the stator to move back and forth in the rotor along the rotating shaft, the telescopic mechanism includes a telescopic rod and a telescopic motor that controls the telescopic rod to move back and forth; the telescopic motor consists of a stator A and a rotor B arranged inside the stator A, the end of the rotor B is fixedly connected to the end of the stator A through a bearing, the rotor B is hollow inside, and a thread is provided on the inner wall; the telescopic rod is cylindrical, and the rear end of the telescopic rod is connected to the rotor B. The inner wall of the telescopic rod is screwed together, and a baffle is provided on the outer side surface of the front end of the telescopic rod to prevent the telescopic rod from being excessively screwed into the rotor B; the baffle is fixedly connected to the stator; bearings A are provided at both ends of the inside of the telescopic rod, and the bearings A can slide back and forth along the rotating shaft; a guide groove is provided on the outer side wall of the telescopic rod, and a slider is provided in the guide groove to prevent the telescopic rod from swinging left and right when rotating and extending; one end of the slider is in contact with the guide groove, and the other end is fixedly connected to the inner side wall of the stator A.

[0005] Preferably, a telescopic mechanism protective cover is provided on the outer side of the telescopic mechanism, and the telescopic mechanism protective cover is a telescopic mechanism protective cover, and the telescopic mechanism protective cover is fixedly connected to the end of the stator A.

[0006] Preferably, the telescopic mechanism protective cover is provided with a hole for the wire to pass through.

[0007] The action process of the present invention is as follows: when the rotor B in the telescopic motor rotates, the rotor B drives the telescopic rod to move forward and backward along the thread. Since the baffle plate arranged at the front end of the telescopic rod is fixedly connected to the stator, when the telescopic rod moves forward and backward, the stator is also driven to move forward and backward along the rotating shaft in the rotor; when the telescopic rod moves forward and backward, the telescopic mechanism protective cover connected to the baffle plate at the front end of the telescopic rod also telescopes forward and backward with the telescopic rod.

[0008] The beneficial effects of the present invention are as follows: the design of the telescopic mechanism stably solves the problem of the rotor moving back and forth along the stator during rotation; when the distance between the rotor and the stator increases, the magnetic flux passing through the stator decreases, and at the same time, the main magnetic flux of the air gap decreases; according to the speed formula of the brushless motor, n=(U-RI) / Ce φ is obtained, wherein U is the voltage; R is the resistance; I is the current; φ is the main magnetic flux of the air gap of the brushless motor; Ce is a constant; when U, R, and I are constants, φ decreases, and the speed of the brushless motor increases. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 : A schematic structural diagram of the present invention.

[0010] Figure 2 : Schematic diagram of the decomposition of the present invention.

[0011] Figure 3 : Figure 1 sectional view of .

[0012] Figure 4 : Figure 3 Schematic diagram of the structure with the stator moving backward.

[0013] Figure 1-4 Among them, 1-brushless motor, 2-fan blades, 3-stator, 4-rotor, 5-housing, 6-rotating shaft, 7-telescopic mechanism, 8-telescopic rod, 9-telescopic motor, 10-stator A, 11-rotor B, 12-bearing, 13-thread, 14-bearing A, 15-guide groove, 16-slider, 17-telescopic mechanism protection cover, 18-hole, 19-baffle. DETAILED DESCRIPTION

[0014] Depend on Figure 1-4The embodiment of the present invention is shown, which includes a brushless motor 1 and a fan blade 2 connected to the brushless motor 1. The brushless motor 1 is composed of a stator 3 and a rotor 4. The stator 3 is arranged inside the rotor 4. The rotor 4 is composed of a shell 5 that can rotate around the stator 4 and a rotating shaft 6 that penetrates the shell 5 and is fixedly connected to the center of the shell 5. The fan blade 2 is fixedly connected to the front end of the rotating shaft 6; the stator 3 can move forward and backward in the rotor 4 along the rotating shaft 6, and the rear end of the stator 3 is provided with a telescopic mechanism 7 that pushes the stator 3 to move forward and backward along the rotating shaft 6 in the rotor 4. The telescopic mechanism 7 includes a telescopic rod 8 and a telescopic motor 9 for controlling the forward and backward movement of the telescopic rod 8; the telescopic motor 9 is composed of a stator A10 and a rotor B11 arranged inside the stator A10, the end of the rotor B11 is fixedly connected to the end of the stator A10 through a bearing 12, the rotor B11 is hollow inside, and a thread 13 is arranged on the inner wall; the telescopic rod 8 is cylindrical, the rear end of the telescopic rod 8 is screwed to the inner wall of the rotor B11, and a baffle 19 is arranged on the outer side surface of the front end of the telescopic rod 8 to prevent the telescopic rod 8 from being excessively screwed into the rotor B11; the baffle 19 is fixedly connected to the stator 3; bearings A14 are arranged at both ends of the telescopic rod 8, and the bearings A14 can slide forward and backward along the rotating shaft 6; a guide groove 15 is arranged on the outer wall of the telescopic rod 8, and a slider 16 is arranged in the guide groove 15 to prevent the telescopic rod 8 from swinging left and right when rotating and telescoping; one end of the slider 16 is in contact with the guide groove 15, and the other end is fixedly connected to the inner wall of the stator A10.

[0015] A telescopic mechanism protective cover 17 is provided on the outside of the telescopic mechanism 7. The telescopic mechanism protective cover 17 is a telescopic mechanism protective cover 17. The rear end of the telescopic mechanism protective cover 17 is fixedly connected to the end of the stator A10, and the front end of the telescopic mechanism protective cover 17 is fixedly connected to the baffle 19.

[0016] The telescopic mechanism protection cover 17 is provided with a hole 18 for the wire to pass through.

Claims

1. A multi-rotor adjustable brushless motor, comprising a brushless motor (1) and a fan blade (2) connected to the brushless motor (1), wherein the brushless motor (1) is composed of a stator (3) and a rotor (4), wherein the stator (3) is arranged inside the rotor (4), and wherein the rotor (4) is composed of a housing (5) rotatable around the stator (4) and a rotating shaft (6) penetrating the housing (5) and fixedly connected to the center of the housing (5), wherein the fan blade (2) is fixedly connected to the front end of the rotating shaft (6), and wherein: The stator (3) can move forward and backward along the rotating shaft (6) in the rotor (4). A telescopic mechanism (7) is provided at the rear end of the stator (3) to push the stator (3) to move forward and backward along the rotating shaft (6) in the rotor (4). The telescopic mechanism (7) includes a telescopic rod (8) and a telescopic motor (9) for controlling the forward and backward movement of the telescopic rod (8). The telescopic motor (9) is composed of a stator A (10) and a rotor B (11) arranged inside the stator A (10). The end of the rotor B (11) is fixedly connected to the end of the stator A (10) via a bearing (12). The rotor B (11) is hollow inside and has a thread (13) on its inner wall. The telescopic rod (8) is cylindrical and telescopic. The rear end of the rod (8) is screwed to the inner side wall of the rotor B (11), and a baffle (19) is provided on the outer side surface of the front end of the telescopic rod (8) to prevent the telescopic rod (8) from being excessively screwed into the rotor B (11); the baffle (19) is fixedly connected to the stator (3); bearings A (14) are provided at both ends of the interior of the telescopic rod (8), and the bearings A (14) can slide forward and backward along the rotating shaft (6); a guide groove (15) is provided on the outer side wall of the telescopic rod (8), and a slider (16) is provided in the guide groove (15) to prevent the telescopic rod (8) from swinging left and right when rotating and extending; one end of the slider (16) is in contact with the guide groove (15), and the other end is fixedly connected to the inner side wall of the stator A (10).

2. The multi-rotor adjustable brushless motor according to claim 1, characterized in that: A telescopic mechanism protection cover (17) is provided on the outside of the telescopic mechanism (7); the telescopic mechanism protection cover (17) is a telescopic mechanism protection cover (17); the rear end of the telescopic mechanism protection cover (17) is fixedly connected to the end of the stator A (10); and the front end of the telescopic mechanism protection cover (17) is fixedly connected to the baffle (19).

3. The multi-rotor adjustable brushless motor according to claim 2, characterized in that: The telescopic mechanism protection cover (17) is provided with a hole (18) for the wire to pass through.

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