Rotating shaft capable of conducting electric signals and motor thereof

Abstract

The utility model relates to a rotating shaft capable of conducting electric signals and a motor thereof, the rotating shaft comprises a main metal rod, the outer wall of the main metal rod is provided with a first insulating layer, the outer wall of the first insulating layer is provided with a first metal cylinder, and the outer wall of the first metal cylinder is sequentially and alternately provided with an Nth insulating layer and an Mth metal cylinder; first electrodes which are in contact connection with the main metal rod are arranged at the two ends of the main metal rod respectively, and the first electrodes do not rotate along with the main metal rod; second electrodes in contact connection with the first metal cylinder are arranged at the two ends of the first metal cylinder respectively, and the second electrodes do not rotate along with the first metal cylinder; two ends of the Mth metal cylinder are respectively provided with a Pth electrode; wherein N is equal to M and P, and is an integer greater than or equal to 0. The utility model not only has the function of transmitting energy, but also has the advantage of providing one or more paths of electric signals.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, specifically to a rotating shaft capable of transmitting electrical signals and its motor. Background Technology

[0002] An electric motor, as an energy conversion device, has the core function of efficiently converting electrical energy into mechanical energy. It operates based on the principle of electromagnetic induction. When current passes through the coil of the motor, a magnetic field is generated around it. This magnetic field interacts with the permanent magnet inside the motor or the magnetic field generated by another set of energized coils, thereby generating a rotational force that drives the rotor of the motor to rotate.

[0003] An electric motor is provided, including a stator assembly having a hollow cavity, the stator assembly being used to generate a magnetic field within the hollow cavity; and a rotor assembly disposed within the hollow cavity, the rotor assembly including a rotor and a shaft connected to each other, the rotor driving the shaft to rotate around the rotation center line under the action of the magnetic field. In this type of electric motor, the shaft only has the function of transmitting energy, and its function is singular.

[0004] In some applications, such as electric toothbrushes, the control circuit needs to provide one or more electrical signals to other circuits in addition to powering the motor. The current solution is to run one or more wires from the circuit board to provide electrical signals to other circuits. This makes the internal wiring of the electric toothbrush complicated and messy, and inconvenient for installation and waterproof design. Utility Model Content

[0005] The purpose of this invention is to provide a rotating shaft that can conduct electrical signals. This rotating shaft not only transmits energy but also provides one or more electrical signals.

[0006] Another objective of this invention is to provide an electric motor.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A conductive shaft for use as the output shaft of a motor rotor includes a main metal rod, a first insulating layer on the outer wall of the main metal rod, a first metal cylinder on the outer wall of the first insulating layer, and an Nth insulating layer and an Mth metal cylinder alternately arranged on the outer wall of the first metal cylinder; first electrodes are respectively provided at both ends of the main metal rod and are in contact with the main metal rod, and the first electrodes do not rotate with the main metal rod; second electrodes are respectively provided at both ends of the first metal cylinder and are in contact with the first metal cylinder, and the second electrodes do not rotate with the first metal cylinder; and P electrodes are respectively provided at both ends of the Mth metal cylinder; wherein N, M, and P are equal and are integers greater than or equal to 0.

[0009] As an improvement to this utility model, N, M, and P are selected between 0 and 4.

[0010] As an improvement to this utility model, the first electrode is a first arc-shaped electrode formed of an elastic metal sheet, with both sides of the first arc-shaped electrode closely abutting the outer wall of the main metal rod.

[0011] As an improvement to this utility model, the second electrode is a second arc-shaped electrode formed by an elastic metal sheet, with both sides of the second arc-shaped electrode closely abutting the outer wall of the first metal cylinder.

[0012] As an improvement to this utility model, the P-th electrode P is a P-th arc-shaped electrode formed by an elastic metal sheet, and the two sides of the P-th arc-shaped electrode are close to the outer wall of the M-th metal cylinder.

[0013] As an improvement to this utility model, the main metal rod, the first metal cylinder, and the Mth metal cylinder are made of copper, aluminum alloy, or steel.

[0014] As an improvement to this utility model, the first insulating layer and the Nth insulating layer are made of insulating plastic, insulating rubber or insulating fiber.

[0015] As an improvement to this utility model, the insulating plastic includes polyethylene, polyvinyl chloride, polytetrafluoroethylene or epoxy resin.

[0016] As an improvement to this utility model, the insulating rubber includes silicone rubber or butyl rubber.

[0017] As an improvement to this utility model, the insulating fiber includes insulating paper.

[0018] This utility model also provides an electric motor, including a stator assembly having a hollow cavity, the stator assembly being used to generate a magnetic field within the hollow cavity; and a rotor assembly disposed within the hollow cavity, the rotor assembly including a rotor and a rotating shaft connected to each other, the rotor driving the rotating shaft to rotate around a rotation center line under the action of the magnetic field; the rotating shaft is the aforementioned rotating shaft capable of conducting electrical signals.

[0019] This invention employs a main metal rod, on the outer wall of which a first insulating layer is provided. A first metal cylinder is located on the outer wall of the first insulating layer, and an Nth insulating layer and an Mth metal cylinder are alternately arranged on the outer wall of the first metal cylinder. First electrodes, which are in contact with the main metal rod, are located at both ends of the main metal rod and do not rotate with it. Second electrodes, which are in contact with the first metal cylinder, are located at both ends of the first metal cylinder and do not rotate with it. A Pth electrode is located at both ends of the Mth metal cylinder. Since N, M, and P are equal and are integers greater than or equal to 0, this invention not only transmits energy but also provides one or more electrical signals. Attached Figure Description

[0020] Figure 1 This is a cross-sectional structural schematic diagram of one embodiment of the rotating shaft of this utility model.

[0021] Figure 2 for Figure 1 Schematic diagram of the exterior plan structure.

[0022] Figure 3 This is a cross-sectional structural schematic diagram of one embodiment of the motor of this utility model.

[0023] Figure 4 for Figure 3 A schematic diagram of the three-dimensional structure. Detailed Implementation

[0024] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this embodiment, and not all embodiments.

[0025] The following is combined with Figures 1-4 This application will be described in further detail.

[0026] Please see first. Figure 1 and Figure 2The invention discloses a rotating shaft capable of conducting electrical signals, used as the output shaft of a motor rotor, specifically for use in electric toothbrushes. It includes a main metal rod 1, with a first insulating layer 2 on its outer wall, a first metal cylinder 3 on the outer wall of the first insulating layer 2, and an Nth insulating layer N and an Mth metal cylinder M alternately arranged on the outer wall of the first metal cylinder 3. First electrodes 11 are respectively provided at both ends of the main metal rod 1, and these first electrodes 11 do not rotate with the main metal rod 1. Second electrodes 21 are respectively provided at both ends of the first metal cylinder 3, and these second electrodes 21 do not rotate with the first metal cylinder 3. A Pth electrode P is respectively provided at both ends of the Mth metal cylinder M. Wherein, N, M, and P are equal and are integers greater than or equal to 0.

[0027] Figure 1 and Figure 2 In the embodiment shown, N, M, and P are selected to be 1, so that at least two electrical signals can be transmitted. Of course, N, M, and P are selected between 0 and 4.

[0028] Preferably, the first electrode 11 is a first arc-shaped electrode formed of an elastic metal sheet, with the two sides 111 of the first arc-shaped electrode closely abutting the outer wall of the main metal rod 1. In this way, the electrical signal can be effectively transmitted, and the first electrode 11 will not rotate with the shaft, thus preventing the wire from getting tangled.

[0029] Preferably, the second electrode 21 is a second arc-shaped electrode formed by an elastic metal sheet, with the two sides 211 of the second arc-shaped electrode closely abutting the outer wall of the first metal cylinder 3. In this way, the electrical signal can be effectively transmitted, and the second electrode 21 will not rotate with the shaft, thus preventing the wire from getting tangled.

[0030] Preferably, the Pth electrode P is a Pth arc-shaped electrode formed by an elastic metal sheet, and the two sides P1 of the Pth arc-shaped electrode are close to the outer wall of the Mth metal cylinder M; in this way, the electrical signal can be effectively transmitted, and the Pth electrode P1 will not rotate with the shaft, and there will be no situation of wire entanglement.

[0031] Preferably, the main metal rod 1, the first metal cylinder 3, and the Mth metal cylinder M are made of copper, aluminum alloy, or steel, and copper, aluminum alloy, or steel have good electrical conductivity.

[0032] Preferably, the first insulating layer 2 and the Nth insulating layer N are made of insulating plastic, insulating rubber or insulating fiber.

[0033] Preferably, the insulating plastic includes polyethylene, polyvinyl chloride, polytetrafluoroethylene, or epoxy resin.

[0034] Preferably, the insulating rubber includes silicone rubber or butyl rubber.

[0035] Preferably, the insulating fiber comprises insulating paper.

[0036] Specifically, the first insulating layer 2 and the Nth insulating layer N can be organic insulating materials, such as plastics including polyethylene (PE): chemically resistant and with low dielectric loss.

[0037] Polyvinyl chloride (PVC): low cost and good flexibility.

[0038] Polytetrafluoroethylene (PTFE): High temperature resistance -200°C~260°C, corrosion resistant.

[0039] Epoxy resin: high mechanical strength and good heat resistance.

[0040] Rubber products; Silicone rubber: Resistant to high and low temperatures -60°C~250°C, flexible. Butyl rubber: Ozone resistant, aging resistant.

[0041] Fiber-based materials; insulating paper: such as Nomex paper, which is heat-resistant and flame-retardant.

[0042] Please see Figure 3 and Figure 4 The present invention also provides an electric motor, including a stator assembly 100 having a hollow cavity 101, the stator assembly 100 being used to generate a magnetic field within the hollow cavity 101; and a rotor assembly 200 disposed within the hollow cavity 101, the rotor assembly 200 including a rotor 201 and a rotating shaft 202 connected to each other, the rotor 201 driving the rotating shaft 202 to rotate around a rotation center line under the action of the magnetic field; the rotating shaft 202 is the aforementioned rotating shaft capable of conducting electrical signals.

[0043] The above description is only a preferred embodiment of this practice, but the scope of protection of this embodiment is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the scope of the technology disclosed in this embodiment, based on the technical solution and the inventive concept of this embodiment, should be covered within the scope of protection of this embodiment.

Claims

1. A shaft conductive to an electric signal, for an output shaft of a rotor of an electric machine, characterized in that, The system includes a main metal rod (1), a first insulating layer (2) on the outer wall of the main metal rod (1), a first metal cylinder (3) on the outer wall of the first insulating layer (2), and an Nth insulating layer (N) and an Mth metal cylinder (M) alternately arranged on the outer wall of the first metal cylinder (3); a first electrode (11) is provided at both ends of the main metal rod (1) and is in contact with the main metal rod (1), and the first electrode (11) does not rotate with the main metal rod (1); a second electrode (21) is provided at both ends of the first metal cylinder (3) and is in contact with the first metal cylinder (3), and the second electrode (21) does not rotate with the first metal cylinder (3); a Pth electrode (P) is provided at both ends of the Mth metal cylinder (M); wherein N, M and P are equal and are integers greater than or equal to 0.

2. The electrically signal conductive pivot according to claim 1, wherein, N, M, and P are selected between 0 and 4.

3. Shaft conductive to electric signals according to claim 1 or 2, characterized in that, The first electrode (11) is a first arc-shaped electrode formed by an elastic metal sheet, and the two sides (111) of the first arc-shaped electrode are close to the outer wall of the main metal rod (1).

4. The electrically signal conductive pivot according to claim 1 or 2, characterized in that, The second electrode (21) is a second arc-shaped electrode formed by an elastic metal sheet, and the two sides (211) of the second arc-shaped electrode are close to the outer wall of the first metal cylinder (3).

5. The electrically signal conductive pivot according to claim 1 or 2, characterized in that, The P-th electrode (P) is a P-th bow-shaped electrode formed by an elastic metal sheet, with its two sides (P1) in close contact with the outer wall of the M-th metal cylinder (M).

6. The electrically signal conductive pivot according to claim 1 or 2, characterized in that, The main metal rod (1), the first metal cylinder (3) and the Mth metal cylinder (M) are made of copper, aluminum alloy or steel.

7. The electrically signal conductive pivot according to claim 1 or 2, characterized in that, The first insulating layer (2) and the Nth insulating layer (N) are made of insulating plastic, insulating rubber or insulating fiber.

8. A shaft conductive to electric signals according to claim 7, characterized in that, The insulating plastic includes polyethylene, polyvinyl chloride, polytetrafluoroethylene, or epoxy resin.

9. The rotating shaft capable of conducting electrical signals according to claim 7, characterized in that, The insulating rubber includes silicone rubber or butyl rubber.

10. An electric motor comprising a stator assembly (100) having a hollow cavity (101) for generating a magnetic field within the hollow cavity (101); a rotor assembly (200) disposed within the hollow cavity (101), the rotor assembly (200) comprising a rotor (201) and a shaft (202) connected to each other, wherein, under the action of the magnetic field, the rotor (201) drives the shaft (202) to rotate about a rotation center line; characterized in that, The rotating shaft (202) is a rotating shaft capable of conducting electrical signals according to any one of claims 1-9.

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