Motor for household robot

Abstract

The invention discloses a motor for a household robot, which comprises a circuit board, a rotor and a rotating shaft, and is characterized in that a winding coil is arranged on the circuit board, and the circuit board is a PCB (Printed Circuit Board); a magnet is arranged on the rotor, the rotor and the circuit board are oppositely arranged, and the rotor is fixedly connected with the rotating shaft. According to the motor, the circuit board serves as the stator, the rotor with the magnet is driven to drive the rotating shaft to rotate, the advantages of the circuit board stator are considered, it can be guaranteed that the output torque of the rotating shaft can meet various industrial application requirements, practicability is higher, and the motor is suitable for large-range popularization.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and particularly to a motor for a household robot. Background Art

[0002] As a device with extremely wide application scope worldwide, the technical content of motors is constantly evolving. The traditional structure of a coil stator driving a rotor to rotate is heavy, and the efficiency is about 80%;

[0003] In the development process of motors, regarding the main body for generating magnetic fields, the PCB printed circuit board has obvious advantages compared with the coil stator. Since it can replace the large-volume coil stator with a circuit board, it is of great significance for reducing the overall weight, volume, and manufacturing cost of the motor. For example, in the invention patent with the publication number CN216564873U, it uses the PCB printed circuit board as both the stator and the rotor, with a simple structure, light weight, and high rotational speed. However, its defect is that its moment of inertia is too small, resulting in a very small torque. In industrial applications, it can only be applied in limited scenarios and cannot meet the torque requirements in most industrial applications. Summary of the Invention

[0004] To solve the problems existing in the prior art, the present invention provides a motor for a household robot. This motor drives a rotor with magnets to drive a rotating shaft to rotate by setting a circuit board as the stator, which not only takes into account the advantages of the circuit board stator but also ensures that the torque output by the rotating shaft can meet the requirements of various industrial applications, has stronger practicability, and is suitable for wide promotion.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] The present invention provides a motor for a household robot, including a circuit board, a rotor, and a rotating shaft. The circuit board is provided with wound coils, and the circuit board is a PCB printed circuit board;

[0007] The rotor is provided with magnets. The rotor and the circuit board are arranged opposite to each other, and the rotor is fixedly connected to the rotating shaft.

[0008] When the motor of the present invention is in use, the circuit board serves as the stator. The circuit board is energized to generate a magnetic field, and the rotor is driven to rotate through the magnets. The rotor drives the rotating shaft to rotate, which not only has the advantages of a large speed range, high efficiency, and light weight brought by the circuit board stator but also has sufficient torque.

[0009] The motor of the present invention drives a rotor with magnets to drive a rotating shaft to rotate by setting a circuit board as the stator, which not only takes into account the advantages of the circuit board stator but also ensures that the torque output by the rotating shaft can meet the requirements of various industrial applications, has stronger practicability, and is suitable for wide promotion.

[0010] In a further technical solution, the circuit board includes a first circuit board and a second circuit board. The first circuit board and the second circuit board are nested side by side on the rotating shaft, and the first circuit board and the second circuit board are in clearance fit;

[0011] The rotor includes a first rotor and a second rotor. The first rotor and the second rotor are nested on the rotating shaft and fixedly connected to the rotating shaft. The first rotor and the second rotor are respectively arranged on the opposite sides of the first circuit board and the second circuit board;

[0012] The magnet is arranged on one side surface of the first rotor and the second rotor facing the circuit board.

[0013] The first rotor, the first circuit board, the second circuit board, and the second rotor nested side by side make the internal structure of the motor compact and the overall volume of the motor smaller.

[0014] In a further technical solution, the wound coils of the first circuit board and the second circuit board are connected by a wire.

[0015] The first circuit board and the second circuit board are used as stators and do not move. Connecting them in series means that only one of the circuit boards needs to be connected to an external power supply, which can simplify the power supply structure.

[0016] In a further technical solution, it further includes an outer casing. The outer casing includes two half casings. The two half casings are buckled to form the outer casing, and the two half casings clamp and fix the first circuit board and the second circuit board.

[0017] The outer casing formed by buckling is convenient for assembling the circuit board and the rotor, and can fix the circuit board at the same time.

[0018] In a further technical solution, multiple sets of the circuit board and the rotor are provided. The multiple sets of the circuit board and the rotor are nested on the rotating shaft in sequence, and a partition board is arranged between adjacent two sets of the circuit board and the rotor.

[0019] The multiple sets of the circuit board and the rotor act together to drive the rotating shaft to rotate, and a larger range of rotational speeds and a larger torque can be obtained to meet higher requirements.

[0020] In a further technical solution, mounting blocks are arranged on the inner wall of the outer casing, and the edge of the partition board is fixedly connected to the outer casing through the mounting blocks.

[0021] The partition board does not rotate with the rotating shaft. Therefore, arranging mounting blocks on the inner wall of the outer casing is convenient for installing the partition board.

[0022] In a further technical solution, it further includes an outer housing, the outer housing is a tubular housing structure, the shape of the radial cross-section of the outer housing is a regular polygon, the inner wall of the outer housing has multiple surfaces, the circuit board is arranged on each surface of the inner wall of the outer housing, the rotating shaft penetrates through the inside of the outer housing, the rotor is arranged on the outer wall of the rotating shaft, the number of the rotors is the same as the number of the circuit boards, and the magnets on the rotors are arranged opposite to the circuit boards.

[0023] The circuit boards are arranged in a regular polygon by the polygonal outer housing, so that the circuit boards can approximately surround a circle. The rotor is directly arranged on the rotating shaft, and the circuit board drives the rotating shaft to rotate through the rotor, further simplifying the structure and making the structure more compact.

[0024] In a further technical solution, the circuit board is embedded in the inner wall of the outer housing.

[0025] Embedding the circuit board in the inner wall of the outer housing can make the distance between the outer housing and the rotor closer, and the structural stability of the circuit board is better, the safety is better, the service life of the motor is longer, and the structure is more compact.

[0026] In a further technical solution, it further includes an inner housing, the inner housing is a tubular housing structure, the shape of the radial cross-section of the inner housing is a regular polygon, the outer wall of the inner housing has multiple surfaces, and the circuit board is arranged on each surface of the outer wall of the inner housing;

[0027] The rotating shaft is a hollow shaft, the rotating shaft is sleeved outside the inner housing, the rotor is arranged on the inner wall of the rotating shaft, the number of the rotors is the same as the number of the circuit boards, and the magnets on the rotors are arranged opposite to the circuit boards.

[0028] The form of the hollow shaft motor can meet the needs of special scenarios, and setting the circuit board inside the rotating shaft further improves the safety of the circuit board.

[0029] In a further technical solution, the circuit board is embedded in the outer wall of the inner housing.

[0030] Embedding the circuit board in the outer wall of the inner housing can make the distance between the inner housing and the rotor closer, and the structural stability of the circuit board is better, the safety is better, the service life of the motor is longer, and the structure is more compact.

[0031] The beneficial effects are as follows:

[0032] 1. The motor of the present invention drives the rotating shaft to rotate by setting the circuit board as the stator and driving the rotor with magnets, which not only takes into account the advantages of the circuit board stator, but also can ensure that the torque output by the rotating shaft can meet the requirements of various industrial applications, has stronger practicability, and is suitable for wide promotion.

[0033] 2. The first rotor, the first circuit board, the second circuit board, and the second rotor nested side by side make the internal structure of the motor compact and the overall volume of the motor smaller.

[0034] 3. The first circuit board and the second circuit board are fixed as stators. Connecting them in series means that only one of the circuit boards needs to be connected to an external power supply, which can simplify the power supply structure.

[0035] 4. The outer housing formed by fastening is convenient for assembling the circuit board and the rotor, and can fix the circuit board at the same time.

[0036] 5. Multiple groups of circuit boards and rotors work together to drive the rotation of the rotating shaft, enabling a larger range of rotational speeds and larger torques to meet higher requirements.

[0037] 6. The isolation plate does not rotate with the rotating shaft. Therefore, installing blocks are arranged on the inner wall of the housing to facilitate the installation of the isolation plate.

[0038] 7. The circuit boards are arranged in a regular polygon by the polygonal outer housing, enabling the circuit boards to approximately surround a circle. The rotor is directly set on the rotating shaft, and the circuit boards drive the rotating shaft to rotate through the rotor, further simplifying the structure and making it compact.

[0039] 8. Embedding the circuit board into the inner wall of the outer housing can make the distance between the outer housing and the rotor closer, and the circuit board has better structural stability, better safety, longer motor life, and a more compact structure.

[0040] 9. The form of the hollow shaft motor can meet the needs of special scenarios, and setting the circuit board inside the rotating shaft further improves the safety of the circuit board.

[0041] 10. Embedding the circuit board into the outer wall of the inner housing can make the distance between the inner housing and the rotor closer, and the circuit board has better structural stability, better safety, longer motor life, and a more compact structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 is a perspective structural view of the motor for a home robot according to the first embodiment of the present invention;

[0043] Figure 2 is Figure 1 the side view of

[0044] Figure 3 is Figure 1 the front view of

[0045] Figure 4 is Figure 3 the cross-sectional view taken along line A-A in

[0046] Figure 5It is a schematic diagram of the internal structure of the motor for a home robot according to the second embodiment of the present invention;

[0047] Figure 6 It is a schematic axial structure diagram of the motor for a home robot according to the third embodiment of the present invention;

[0048] Figure 7 It is a schematic axial structure diagram of the motor for a home robot according to the fourth embodiment of the present invention.

[0049] Reference numerals:

[0050] 101, rotating shaft; 102, first circuit board; 103, second circuit board; 104, first rotor; 105, second rotor; 106, magnet; 107, outer housing; 108, isolation board; 109, inner housing. Detailed implementation manners

[0051] The present invention will be further described below with reference to the accompanying drawings:

[0052] Embodiment 1:

[0053] A motor for a home robot, as Figure 1 shown, includes a circuit board, a rotor and a rotating shaft 101. A winding coil is provided on the circuit board, and the circuit board is a PCB printed circuit board;

[0054] As Figures 2-4 shown, a magnet 106 is provided on the rotor. The rotor and the circuit board are arranged opposite to each other, and the rotor is fixedly connected to the rotating shaft 101.

[0055] When the motor of the present invention is in use, the circuit board serves as a stator. The circuit board is energized to generate a magnetic field, and the rotor is driven to rotate through the magnet 106. The rotor drives the rotating shaft 101 to rotate, having both the advantages of a large speed range, high efficiency, and light weight brought by the circuit board stator, and also having sufficient torque.

[0056] The motor of the present invention drives the rotor with a magnet 106 to drive the rotating shaft 101 to rotate by setting the circuit board as a stator, taking into account both the advantages of the circuit board stator and ensuring that the torque output by the rotating shaft 101 can meet the requirements of various industrial applications, with stronger practicability and suitable for wide promotion.

[0057] Furthermore, in this embodiment, as Figure 2 and Figure 4 shown, the circuit board includes a first circuit board 102 and a second circuit board 103. The first circuit board 102 and the second circuit board 103 are nested side by side on the rotating shaft 101, and the first circuit board 102 and the second circuit board 103 are in clearance fit;

[0058] The rotor includes a first rotor 104 and a second rotor 105. The first rotor 104 and the second rotor 105 are nested on the rotating shaft 101 and fixedly connected to the rotating shaft 101. The first rotor 104 and the second rotor 105 are respectively arranged on the opposite sides of the first circuit board 102 and the second circuit board 103.

[0059] The magnet 106 is arranged on one side surface of the first rotor 104 and the second rotor 105 facing the circuit board.

[0060] The first rotor 104, the first circuit board 102, the second circuit board 103, and the second rotor 105 nested side by side make the internal structure of the motor compact, and the overall volume of the motor is smaller.

[0061] Further, in this embodiment, the wound coils of the first circuit board 102 and the second circuit board 103 are connected by wires.

[0062] The first circuit board 102 and the second circuit board 103 are fixed as stators. Connecting them in series means that only one of the circuit boards needs to be connected to an external power supply, which can simplify the power supply structure.

[0063] Further, in this embodiment, it further includes an outer casing 107. The outer casing 107 includes two half-casings. The two half-casings are buckled to form the outer casing 107, and the two half-casings clamp and fix the first circuit board 102 and the second circuit board 103.

[0064] The outer casing 107 formed by buckling is convenient for assembling the circuit board and the rotor, and can fix the circuit board at the same time.

[0065] Further, in this embodiment, as Figure 3 shown, the outer casing 107 has a notch. A protrusion is provided at the edge of the first circuit board 102. The protrusion extends out of the notch. The wiring terminals of the wound coils on the first circuit board 102 are arranged on the protrusion. The common wiring of the first circuit board 102 and the second circuit board 103 is realized through the terminals on the protrusion.

[0066] By providing the protrusion, the wiring of the circuit board is more convenient, and further convenient for use.

[0067] In another embodiment, as Figure 5 shown, there are multiple sets of circuit boards and rotors. The multiple sets of circuit boards and rotors are sequentially nested on the rotating shaft 101, and a separator 108 is arranged between adjacent two sets of circuit boards and rotors.

[0068] The multiple sets of circuit boards and rotors act together to drive the rotating shaft 101 to rotate, and can obtain a wider range of rotational speeds and greater torques to meet higher requirements.

[0069] The isolation plate 108 is provided to avoid interference caused by the magnetic field between adjacent circuit boards.

[0070] Furthermore, in this embodiment, there are 3 sets of circuit boards and rotors. It can be understood that the number of circuit boards and rotors can be 4 sets, 5 sets or other numbers.

[0071] Furthermore, in this embodiment, the outer casing 107 is composed of multiple parts. Since each circuit board needs to be fastened and clamped by a part of the casing, the outer casing 107 composed of multiple parts can meet the fixing needs of the circuit boards. At the same time, the outer casing 107 composed of multiple parts is also more convenient for processing and assembly.

[0072] Furthermore, the material of the isolation plate 108 is a soft magnetic material with high magnetic permeability. Specifically, in this embodiment, the isolation plate 108 is soft iron.

[0073] Furthermore, in this embodiment, as Figure 5 shown, the inner wall of the outer casing is provided with mounting blocks, and the edge of the isolation plate 108 is fixedly connected to the outer casing through the mounting blocks.

[0074] The isolation plate 108 does not rotate with the rotating shaft 101. Therefore, setting mounting blocks on the inner wall of the outer casing facilitates the installation of the isolation plate 108.

[0075] In another embodiment, as Figure 6 shown, it further includes an outer casing 107. The outer casing 107 is a tubular housing structure. The shape of the radial cross-section of the outer casing 107 is a regular polygon. There are multiple inner walls of the outer casing 107, and circuit boards are provided on each inner wall of the outer casing 107. In Figure 6 it, the circuit board is shown as the first circuit board 102. The rotating shaft 101 passes through the inside of the outer casing 107, and the rotor is arranged on the outer wall of the rotating shaft 101. In Figure 6 it, the rotor is shown as the first rotor 104. The number of rotors is the same as the number of circuit boards, and the magnets 106 on the rotor are arranged opposite to the circuit boards.

[0076] By arranging the circuit boards in a regular polygon by the polygonal outer casing 107, the circuit boards can approximately surround a circle. The rotor is directly arranged on the rotating shaft 101, and the circuit boards drive the rotating shaft 101 to rotate through the rotor, further simplifying the structure and making the structure compact.

[0077] The motor in this embodiment is a cylindrical motor with a small diameter.

[0078] Furthermore, in this embodiment, as Figure 6 shown, the circuit board is embedded in the inner wall of the outer casing 107.

[0079] Embed the circuit board into the inner wall of the outer housing 107, so that the distance between the outer housing 107 and the rotor can be closer, and the structural stability of the circuit board is better, the safety is better, the motor life is longer, and the structure is more compact.

[0080] It can be understood that the rotating shaft 101 is fixed through other structures provided at its end, and only its driving structure will be described here.

[0081] In another embodiment, as Figure 7 shown, it further includes an inner housing 109. The inner housing 109 is a tubular housing structure. The shape of the radial cross-section of the inner housing 109 is a regular polygon. The outer wall of the inner housing 109 has multiple surfaces, and the circuit board is provided on each surface of the outer wall of the inner housing 109. In Figure 7 it, the circuit board is shown as the first circuit board 102;

[0082] The rotating shaft 101 is a hollow shaft. The rotating shaft 101 is sleeved outside the inner housing 109, and the rotor is arranged on the inner wall of the rotating shaft 101. In Figure 7 it, the rotor is shown as the first rotor 104. The number of rotors is the same as the number of circuit boards, and the magnets 106 on the rotor are arranged opposite to the circuit boards.

[0083] It can be understood that the inner housing 109 and the rotating shaft 101 are fixed through other structures provided at their ends, and only their driving structure will be described here.

[0084] The form of the hollow shaft motor can meet the needs of special scenarios, and at the same time, setting the circuit board inside the rotating shaft 101 further improves the safety of the circuit board.

[0085] Furthermore, in this embodiment, the circuit board is embedded in the outer wall of the inner housing 109.

[0086] The circuit board is embedded in the outer wall of the inner housing 109, so that the distance between the inner housing 109 and the rotor can be closer, and the structural stability of the circuit board is better, the safety is better, the motor life is longer, and the structure is more compact.

[0087] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, including but not limited to the reverse application of generator design. These changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A motor for a household robot, characterized in that, It includes a circuit board, a rotor and a rotating shaft. A winding coil is arranged on the circuit board, and the circuit board is a PCB printed circuit board; Magnets are arranged on the rotor. The rotor and the circuit board are arranged opposite to each other, and the rotor is fixedly connected to the rotating shaft.

2. The motor for a home robot according to claim 1, wherein The circuit board includes a first circuit board and a second circuit board. The first circuit board and the second circuit board are nested side by side on the rotating shaft, and the first circuit board and the second circuit board are in clearance fit; The rotor includes a first rotor and a second rotor. The first rotor and the second rotor are nested on the rotating shaft and fixedly connected to the rotating shaft. The first rotor and the second rotor are respectively arranged on the opposite sides of the first circuit board and the second circuit board; The magnets are arranged on one side surface of the first rotor and the second rotor facing the circuit board.

3. The motor for a home robot according to claim 2, characterized in that, The winding coils of the first circuit board and the second circuit board are connected by wires.

4. The motor for a household robot according to claim 2, wherein, It further includes an outer housing. The outer housing includes two half shells, and the two half shells are buckled to form the outer housing. The two half shells clamp and fix the first circuit board and the second circuit board.

5. The motor for a home robot according to claim 2, characterized in that, Multiple groups of the circuit boards and the rotors are provided. The multiple groups of circuit boards and rotors are nested on the rotating shaft in sequence, and a partition board is arranged between adjacent two groups of circuit boards and rotors.

6. The motor for a household robot according to claim 5, characterized in that, Mounting blocks are arranged on the inner wall of the outer housing, and the edge of the partition board is fixedly connected to the outer housing through the mounting blocks.

7. The motor for a home robot according to claim 1, wherein It further includes an outer housing. The outer housing is of a tubular housing structure. The shape of the radial cross-section of the outer housing is a regular polygon. The inner wall of the outer housing has multiple surfaces. The circuit boards are arranged on each surface of the inner wall of the outer housing. The rotating shaft passes through the inside of the outer housing. The rotors are arranged on the outer wall of the rotating shaft. The number of the rotors is the same as the number of the circuit boards. The magnets on the rotors are arranged opposite to the circuit boards.

8. The motor for a home robot according to claim 7, wherein, The circuit boards are embedded in the inner wall of the outer housing.

9. The motor for a household robot according to claim 1, wherein, It further includes an inner housing. The inner housing is of a tubular housing structure. The shape of the radial cross-section of the inner housing is a regular polygon. The outer wall of the inner housing has multiple surfaces. The circuit boards are arranged on each surface of the outer wall of the inner housing; The rotating shaft is a hollow shaft. The rotating shaft is sleeved outside the inner housing. The rotors are arranged on the inner wall of the rotating shaft. The number of the rotors is the same as the number of the circuit boards. The magnets on the rotors are arranged opposite to the circuit boards.

10. The motor for a home robot according to claim 9, characterized in that, The circuit boards are embedded in the outer wall of the inner housing.

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