Magnetic coupling type waterproof motor capable of controlling output torque

Abstract

The invention discloses a magnetic coupling type waterproof motor capable of controlling output torque, and belongs to the technical field of electromagnetic synchronous motors. Comprising an inner disc and an outer disc, at least two inner coils are embedded into the inner disc, the inner disc and an output shaft of a motor are concentrically and fixedly connected into a whole, at least two outer coils are embedded into the outer disc, and the outer disc is connected with an output shaft; the inner disc and the outer disc are separated by a surface, parallel to the disc surface, of the shell; the inner coils embedded in the inner disc and the outer coils embedded in the outer disc are distributed in a circular array with the same size, and the directions of magnetic fields generated after every two adjacent coils are powered on are opposite. According to the magnetic coupling waterproof motor structure, the problem of power output loss of an existing magnetic coupling waterproof motor structure is solved through attraction force and repulsive force between the electrified coils which are arranged at intervals and have opposite magnetic field directions of the adjacent coils. The output torque of the motor is adjusted by controlling the distance between the inner disc and the outer disc and the number of pairs of electrified coils, and the motor can adapt to various power output environments with different requirements.

Description

Technical Field

[0001] The present invention belongs to the technical field of electromagnetic synchronous motors, and particularly relates to a magnetic coupling type waterproof motor with controllable output torque. Background Art

[0002] A waterproof motor is a motor specifically applied to work underwater for a long time. In order to ensure the waterproof effect of the waterproof motor, engineers usually make special designs on the structure of the waterproof motor to ensure its high-efficiency waterproof performance.

[0003] Regarding a waterproof motor based on magnetic coupling designed in the existing patent with the publication number CN207559738U, according to its content description, its power transmission only relies on the attraction between the strong magnets for coupling. The drawback of this power transmission is that when the resistance received by the external output end becomes larger, it is easy for misalignment to occur between the two rotating disks, that is, the originally corresponding strong magnet pairs coupled by attraction will separate and attract and couple with the adjacent strong magnets on the corresponding side, resulting in the problem of decreased power output efficiency. Summary of the Invention

[0004] The purpose of the present invention is to optimize and improve the above problems, and a magnetic coupling type waterproof motor with controllable output torque is proposed.

[0005] To achieve the above purpose, the present invention adopts the following solutions: A magnetic coupling type waterproof motor with controllable output torque includes an inner disk and an outer disk. Two or more inner coils are embedded in the inner disk. The inner disk is concentrically fixed and integrated with the output shaft of the motor. The motor is integrally connected with the slider of an electric screw rod slide rail through a motor bracket. Two or more outer coils are embedded in the outer disk. The outer disk is connected with an output shaft. The output shaft is concentrically nested with a bearing and fixed and integrated with the inner ring of the bearing, so that the axis of the output shaft coincides with the axis of the motor. The inner disk and the outer disk are separated by an end face on the shell that is parallel to the disk face and does not contact. The inner coils embedded in the inner disk and the outer coils embedded in the outer disk are distributed in a circular array of the same size, and the magnetic field directions generated after two adjacent coils are energized are opposite.

[0006] Preferably, the electric screw rod slide rail is connected with a control circuit I. The control circuit I includes a power supply, an HC-14 module, an STM32F103C8T6 module, and an A4988 module. The power supply is electrically connected to other modules to supply power to other modules. The STM32F103C8T6 module is electrically connected to the HC-14 module and the A4988 module.

[0007] Preferably, the screw of the electric screw slide has two smooth sections without threads, and a spring 1 and a spring 2 are respectively mounted on both ends of the screw. Spring 1 is fixed to the slide motor, and spring 2 is fixed to the other end of the electric screw slide. The original length of spring 1 and spring 2 is greater than the length from their respective fixed positions to the end of the smooth section without threads.

[0008] Preferably, a control circuit 2 is encapsulated inside the internal disk, and the control circuit 2 includes a power supply, an HC-14 module, an STM32F103C8T6 module, and a relay. The power supply is electrically connected to other modules to supply power to other modules, and the STM32F103C8T6 module is electrically connected to the HC-14 module and the relay.

[0009] Preferably, the number of relays in the relay 1 is half the number of inner coils embedded on the inner disk, and one relay simultaneously controls two corresponding coils along the diameter direction on the inner disk, and does not overlap with the coils controlled by other relays.

[0010] Preferably, a control circuit three is encapsulated inside the external disc, and the control circuit three includes a power supply, an HC-14 module, an STM32F103C8T6 module, and a second relay. The power supply is electrically connected to other modules to supply power to other modules, and the STM32F103C8T6 module is electrically connected to the HC-14 module and the second relay.

[0011] Preferably, the number of relays in the relay 2 is half the number of external coils embedded on the external disk, and one relay simultaneously controls two corresponding coils along the diameter direction on the external disk, and does not overlap with the coils controlled by other relays.

[0012] Preferably, a shell is provided to divide the waterproof structure into two parts, an inner part and an outer part, and the shell is provided with a bracket for mounting the bearing.

[0013] Preferably, the power supply is a lithium battery with multi-channel voltage-stabilized output, supporting 12V and 3.3V voltage output.

[0014] Compared with the prior art, the advantages and positive effects of the present invention are:

[0015] 1. In the present invention, the attractive force and repulsive force between the energized coils arranged in an interlaced manner and with the magnetic fields of adjacent coils in opposite directions ensure that the positions of the inner and outer disks remain unchanged, so that there is no loss in power output.

[0016] 2. In the present invention, the internal disc is driven by moving the lead screw, the distance between the inner and outer discs is controlled, and the output torque of the motor is adjusted by changing the logarithm of the energized coils, which simplifies the process of controlling the output torque of the internal motor and adapts to a variety of power output environments with different requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The attached drawings of the specification of the present application are used to provide a further understanding of the present application and do not constitute an improper limitation of the present application.

[0018] Figure 1 Schematic diagram of the three-dimensional structure of the present invention; Figure 2 Schematic diagram of the internal control circuit of the internal disc and the external disc of the present invention; Figure 3 Schematic diagram of the relationship of the control circuit of the electric screw rod slide rail of the present invention; Figure 4 Schematic diagram of the relationship of the second control circuit inside the internal disc of the present invention; Figure 5 Schematic diagram of the relationship of the third control circuit inside the external disc of the present invention; Figure 6 Schematic diagram of the positional relationship of the end face of the housing between the two discs of the present invention; In the figure: 1 - housing; 2 - motor; 3 - internal disc; 4-1 - inner coil; 4-2 - outer coil; 5 - bracket; 6 - bearing; 7 - output shaft; 8 - control circuit one; 9 - electric screw rod slide rail; 10 - smooth section without thread; 11 - screw rod; 12 - slider; 13 - limit rod; 14 - external disc; 15 - control circuit two; 16 - control circuit three; 17 - end face; 18 - first spring; 19 - second spring. Detailed implementation manners

[0019] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention will be further described below with reference to the attached drawings and embodiments. It should be noted that, without conflict, the features in the embodiments of the present application can be combined with each other.

[0020] Such as Figure 1As shown in the figure, the present invention provides a magnetic coupling waterproof motor with controllable output torque, which includes an internal disk 3 and an external disk 14. Two or more inner coils 4-1 are embedded in the internal disk 3. In this embodiment, there are 6 inner coils. The internal disk 3 is concentrically and fixedly connected to the output shaft of the motor 2 as a whole. The motor 2 is integrally connected to the slider 12 of the electric screw rail 9 through a motor bracket. After connection, it is necessary to ensure that the axis of the motor 2 is parallel to the axis of the screw 11. The electric screw rail 9 where the screw 11 is located is integrally connected to the housing 1, so that the housing 1 seals and wraps the electric screw rail 9, the control circuit 8, the motor 2, the internal disk 3 and the inner coils 4-1 thereon and the control circuit 15 inside it. Two or more outer coils 4-2 are embedded in the external disk 14. The external disk 14 is concentrically and fixedly connected to the output shaft 7 as a whole. The output shaft 7 is concentrically nested with a bearing 6 and is fixedly connected to the inner ring of the bearing 6. The outer ring of the bearing 6 is fixedly supported by a bracket 5 extending from the housing 1, so that the axis of the output shaft 7 coincides with the axis of the motor 2. The fixed internal disk 3 and external disk 14 are separated by a surface of the housing 1 that is parallel to the disk surface and does not contact. The non-contact surface refers to the end face 17 at one end of the housing 1 close to the external disk 14. As Figure 6 shown, this end face is located between the disk surfaces of the internal disk 3 and the external disk 14, is parallel to the disk surfaces of the disks, and separates the internal disk 3 and the external disk 14 and places them on both sides of this surface respectively. The inner coils 4-1 embedded in the internal disk 3 and the outer coils 4-2 embedded in the external disk 14 are distributed in a circular array of the same size, and the directions of the magnetic fields generated after two adjacent coils are energized should be opposite.

[0021] The electric screw rail is connected with a control circuit 8. The control circuit 8 includes a power supply, an HC-14 module, an STM32F103C8T6 module, and an A4988 module. The power supply is electrically connected to other modules to supply power to other modules. The STM32F103C8T6 module is electrically connected to the HC-14 module and the A4988 module.

[0022] As Figure 3 shown, the HC-14 module in the control circuit 8 receives an external remote control signal and transmits the signal to the STM32F103C8T6. The latter sends out corresponding instructions according to the received signal content through the A4988 module to drive the rail motor. The rail motor drives the screw 11 to rotate. The slider 12 and the screw 11 are in threaded cooperation, and the slider 12 is restricted by the left and right limit rods 13. Therefore, the slider 12 will move linearly along the direction of the screw 11 as the screw 11 rotates, so as to drive the internal disk to move linearly in the direction of the screw 11. During this process, the power supply in the control circuit 8 supplies 3.3V power to the HC-14 module, the STM32F103C8T6 module, and the A4988 module, and supplies 12V power to the rail motor.

[0023] The screw rod 11 has two equal length smooth sections 10 without threads, which are locking structures, and the length of each smooth section 10 without threads is greater than the thickness of the slider 12 in the axial direction of the screw rod 11, so as to prevent the slider 12 from exceeding the limit when driving the internal disc 3 to move linearly along the screw rod 11, causing the internal disc 3 to touch the housing 1 or the slider 12 to touch the slide rail motor at the end of the screw rod 11. The two ends of the screw rod 11 are respectively covered with a spring 1 and a spring 2, the spring 1 is fixed to the slide rail motor, and the spring 2 is fixed to the other end of the electric screw rod slide rail. The original length of the springs 1 and 2 is greater than the length from their respective fixed positions to the end of the smooth section without threads. When the slider 12 slides to the smooth section without threads 10 to achieve locking, the elastic force of the spring 1 or 2 under compression will push the slider 12 close to the thread end of the smooth section without threads 10. When the screw rod 11 rotates in the opposite direction, the slider 12 will re-engage with the thread and return to the movable threaded section to achieve the unlocking effect.

[0024] like Figure 2 As shown, the internal disk 3 is encapsulated with a control circuit 2 15. The control circuit 2 15 includes a power supply, an HC-14 module, an STM32F103C8T6 module, and a relay 1. The power supply is electrically connected to other modules to supply power to other modules, and the STM32F103C8T6 module is electrically connected to the HC-14 module and the relay 1.

[0025] like Figure 4 As shown, the HC-14 module in the control circuit 2 15 receives an external remote control signal and transmits the signal to the STM32F103C8T6, which issues a corresponding instruction to control one or more relays in the relay 1 to be powered on or off according to the received signal content, thereby controlling whether the corresponding coil is powered on to generate magnetic force. In this process, the power supply in the control circuit 2 15 supplies 3.3V power to the HC-14 module and the STM32F103C8T6 module, and supplies 12V power to the relay 1.

[0026] The number of relays in the relay 1 is half the number of the inner coils 4-1 embedded on the inner disk 3. One relay controls two corresponding coils on the inner disk along the diameter direction at the same time, and does not overlap with the coils controlled by other relays.

[0027] like Figure 2 As shown, the external disk 14 is encapsulated with a control circuit 3 16. The control circuit 3 16 includes a power supply, an HC-14 module, an STM32F103C8T6 module, and a relay 2. The power supply is electrically connected to other modules to supply power to other modules, and the STM32F103C8T6 module is electrically connected to the HC-14 module and the relay 2.

[0028] likeFigure 5 As shown, the HC-14 module in the control circuit three 16 receives an external remote control signal and transmits the signal to the STM32F103C8T6. The latter issues corresponding instructions according to the received signal content to control one or more relays in the relay two to be powered on or off, so as to control whether the corresponding coil is powered on to generate magnetic force. This process is powered by the power supply in the control circuit three 16 to supply 3.3V power to the HC-14 module and the STM32F103C8T6 module, and supply 12V power to the relay two.

[0029] The number of relays in the relay two is half of the number of outer coils 4-2 embedded on the external disc 14. One relay controls two corresponding coils on the external disc along the diameter direction at the same time, and does not repeat the coils controlled by other relays.

[0030] The above power supply is a lithium battery with multiple regulated outputs, supporting 12V and 3.3V voltage outputs.

[0031] The power supply, HC-14 module, STM32F103C8T6 module, relay, etc. in the above structure are all standard devices that can be directly purchased, and their connection and control methods are well-known in the art. The specific operations are not described in detail here.

[0032] During use, by sending a remote control signal to the HC-14 module in the control circuit two 15 and the control circuit three 16, the number of energized coils of the inner coil 4-1 embedded on the inner disc 3 and the outer coil 4-2 embedded on the outer disc 14 and the magnetic field direction generated by the energization are controlled. The rotation of the inner disc 3 with the motor 2 causes the magnetic field distribution generated by the inner coil 4-1 to change. The outer disc 14 will rotate following this change due to the attraction of opposite magnetic fields and the repulsion of the same magnetic fields. The more energized coils there are, the greater the torque generated by the outer disc 14 following the magnetic field change. At the same time, by sending a remote control signal to the HC-14 module in the control circuit one 8, the rotation of the slide rail motor can be controlled to realize the movement of the slider 12 in the direction of the lead screw 11, and indirectly control the forward and backward movement of the inner disc 3 in the housing 1 to control the distance between the inner disc 3 and the outer disc 14. The smaller the distance, the greater the torque generated by the outer disc 14 following the magnetic field change. Since the magnetic field directions generated by adjacent energized coils are opposite, the repulsive force is generated between the magnetic fields of a pair of energized coils coupled together due to the attraction force and the energized coils on their adjacent sides, so that a pair of energized coils originally coupled together by the attraction force will not be misaligned, which to a greater extent ensures the efficiency of power output compared with the prior art. Since the housing 1 divides the whole structure into two parts inside and outside, the inside is completely enclosed, and the control circuit three 16 is sealed in the external disc 14, the waterproof performance of the exposed part is extremely good, and the static seal structure for non-contact power transmission is built, effectively solving the dynamic seal problem during power transmission.

[0033] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention in any other form. Any person skilled in the art can use the technical content disclosed above to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A magnetically coupled waterproof motor with controllable output torque, comprising an inner disc (3) and an outer disc (14), characterized in that: The inner disk (3) is embedded with at least two inner coils (4-1), the inner disk (3) is coaxially fixed to the output shaft of the motor (2), the motor (2) is connected to the slider (12) of the electric lead screw guide rail (9) through a motor bracket, the outer disk (14) is embedded with at least two outer coils (4-2), the outer disk (14) is connected to an output shaft (7), the output shaft (7) is coaxially embedded with a bearing (6) and is fixed to the inner ring of the bearing (6) so that the axis of the output shaft (7) coincides with the axis of the motor (2), the inner disk (3) and the outer disk (14) are separated by an end face (17) on the housing (1) that is parallel to the disk surface and does not contact it, the inner coil (4-1) embedded in the inner disk (3) and the outer coil (4-2) embedded in the outer disk (14) are distributed in a circular array of equal size, and the magnetic fields generated by two adjacent coils after power is supplied are in opposite directions.

2. The magnetic coupling waterproof motor with controllable output torque according to claim 1, characterized in that: The electric screw guide rail (9) is connected to a control circuit 1 (8); the control circuit 1 (8) comprises a power supply, an HC-14 module, an STM32F103C8T6 module, and an A4988 module; the power supply is electrically connected to the other modules to supply power to the other modules; and the STM32F103C8T6 module is electrically connected to the HC-14 module and the A4988 module.

3. The magnetic coupling waterproof motor with controllable output torque according to claim 1, characterized in that: The screw rod (11) of the electric screw rod slide rail (9) has two smooth sections without threads, and the two ends of the screw rod (11) are respectively covered with a spring 1 (18) and a spring 2 (19), the spring 1 (18) is fixed to the slide rail motor, and the spring 2 (19) is fixed to the other end of the electric screw rod slide rail (9), and the original length of the spring 1 (18) and the spring 2 (19) is greater than the length from their respective fixed positions to the end of the smooth section without threads.

4. The magnetic coupling waterproof motor with controllable output torque according to claim 1, characterized in that: The inner disk (3) encapsulates a second control circuit (15); the second control circuit (15) comprises a power supply, an HC-14 module, an STM32F103C8T6 module, and a first relay; the power supply is electrically connected to the other modules to supply power to the other modules, and the STM32F103C8T6 module is electrically connected to the HC-14 module and the first relay.

5. The magnetic coupling waterproof motor with controllable output torque according to claim 4, characterized in that: The number of relays in the relay one is half the number of the inner coils (4-1) embedded on the inner disk (3), and one relay simultaneously controls two corresponding coils along the diameter direction on the inner disk, without duplication with coils controlled by other relays.

6. The magnetic coupling waterproof motor with controllable output torque according to claim 1, characterized in that: The external disc (14) encapsulates a control circuit three (16) inside; the control circuit three (16) includes a power supply, an HC-14 module, an STM32F103C8T6 module, and a second relay; the power supply is electrically connected to the other modules to supply power to the other modules, and the STM32F103C8T6 module is electrically connected to the HC-14 module and the second relay.

7. The magnetic coupling waterproof motor with controllable output torque according to claim 6, characterized in that: The number of relays in the relay 2 is half the number of the outer coils (4-2) embedded on the outer disc (14), and one relay simultaneously controls two coils corresponding to each other along the diameter direction on the outer disc, without duplication with coils controlled by other relays.

8. The magnetic coupling waterproof motor with controllable output torque according to claim 1, characterized in that: The housing (1) divides the waterproof structure of the motor into two parts, an inner part and an outer part. The housing (1) is provided with a bracket (5) for mounting a bearing (6).

9. A magnetically coupled waterproof motor with controllable output torque according to claim 4 or 6, characterized in that: The power supply is a lithium battery with multiple voltage-stabilized outputs, supporting 12V and 3.3V voltage outputs.

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