Paddle locking device and electric aircraft

Abstract

The invention relates to the technical field of electric aircraft propeller locking, in particular to a propeller locking device and an electric aircraft, the propeller locking device comprises a stator assembly and a rotor assembly, the stator assembly comprises a permanent magnet and a magnetic supply component, the magnetic supply component is used for magnetizing or demagnetizing the permanent magnet, and the rotor assembly comprises a magnetic conductive column. The permanent magnet can be magnetized through the arranged magnetic supply component, so that the permanent magnet has magnetism and attracts the magnetic conductive column arranged opposite to the permanent magnet, the magnetic conductive column cannot rotate relative to the permanent magnet, and the permanent magnet is connected to the fixed part of the driving motor, so that the rotating part of the driving motor connected with the magnetic conductive column cannot rotate; compared with a traditional propeller locking mode, the propeller locking method has the advantages that the driving motor does not need to be powered on continuously, so that the driving motor does not generate heat continuously for a long time, the electric quantity of a battery is saved, and the cruising ability is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electric aircraft propeller locking, and in particular to a propeller locking device and an electric aircraft. Background Art

[0002] In recent years, the new energy industry has developed rapidly, and electric aircraft for low-altitude travel has become a forward-looking research and development topic for major OEMs. However, the aircraft propeller locking function has always been a pain point that has plagued major OEMs.

[0003] At present, the mainstream way to lock the propellers of electric aircraft is to add a propeller locking program to the software. Direct current is passed to two phases of the three-phase permanent magnet synchronous drive motor, so that the stator in the fixed part of the drive motor produces a fixed magnetic field. This magnetic field attracts the magnetic field of the rotor in the rotating part of the drive motor, ensuring that the rotor is locked and motionless, thereby locking the blades connected to the rotating part of the drive motor.

[0004] However, this method will cause the drive motor to be continuously powered, which will cause the drive motor to continue to heat up for a long time. On the other hand, it will consume the battery power that provides power to the drive motor, affecting the battery life. Summary of the invention

[0005] (I) The problem to be solved by the present invention is: how to save battery power without affecting battery life.

[0006] (II) Technical solution

[0007] The present invention provides a propeller locking device, which is used to lock a propeller blade connected to a rotating part of a driving motor in an electric aircraft, and includes a stator assembly and a rotor assembly;

[0008] The stator assembly includes a permanent magnet and a magnetization component, wherein the permanent magnet is connected to a fixed part of the drive motor, and the magnetization component is used to magnetize or demagnetize the permanent magnet;

[0009] The rotor assembly includes a magnetically conductive column, the magnetically conductive column is connected to the rotating part of the driving motor, and the magnetically conductive column is arranged opposite to the permanent magnet.

[0010] According to one embodiment of the present invention, the magnetization supply component comprises a power supply and a magnetization coil, and the magnetization coil is wound around the circumference of the permanent magnet;

[0011] The power supply is electrically connected to the field exchange coil and is used to provide a forward current or a reverse current to the field exchange coil.

[0012] According to one embodiment of the present invention, the stator assembly further comprises a first ring plate, and the permanent magnet is connected to the first ring plate;

[0013] The rotor assembly further comprises a second ring plate, and the magnetic conductive column is connected to the second ring plate;

[0014] The first ring plate is fixedly connected to the fixed part of the driving motor, and the second ring plate is connected to the rotating part of the driving motor.

[0015] According to an embodiment of the present invention, the rotor assembly is slidably connected to the rotating part of the driving motor via a guide member, and the guide member is used to guide the magnetic conductive column to move only in a direction approaching or away from the permanent magnet.

[0016] According to one embodiment of the present invention, the inner side wall of the second ring plate is in contact with the outer side wall of the rotating part of the driving motor;

[0017] The guide member comprises a slide groove provided on the inner side wall of the second ring plate;

[0018] A slider is fixedly connected to the outer side wall of the rotating part of the driving motor, and the slider is slidably connected in the slide groove;

[0019] According to one embodiment of the present invention, the propeller locking device further includes a spring, one end of which is connected to the second ring plate, and the other end of which is connected to the rotating part of the drive motor.

[0020] According to one embodiment of the present invention, the propeller locking device further includes an auxiliary limiting assembly, and the auxiliary limiting assembly is used to limit the rotation of the rotating part of the driving motor.

[0021] According to one embodiment of the present invention, the auxiliary limiting assembly includes a locking column fixedly connected to the first ring plate;

[0022] The second ring plate is provided with a locking hole adapted to the locking column.

[0023] According to an embodiment of the present invention, a plurality of permanent magnets are provided, and the magnetic exchange coils and the magnetic conductive columns correspond to the permanent magnets one by one, and the magnetic exchange coils are wound around the corresponding permanent magnets.

[0024] An electric aircraft comprises any one of the propeller locking devices described above and also comprises a driving motor.

[0025] Beneficial effects of the present invention:

[0026] By setting up a magnetic supply component, the permanent magnet can be magnetized, making the permanent magnet magnetic, attracting the magnetic column arranged opposite to it, so that the permanent magnet cannot rotate relative to the permanent magnet. Since the permanent magnet is connected to the fixed part of the drive motor, the rotating part of the drive motor connected to the magnetic column cannot rotate, and the blades connected to the rotating part of the drive motor cannot rotate, thereby achieving the purpose of locking the propeller. Compared with the traditional propeller locking method, the drive motor does not need to be continuously powered on, so the drive motor will not continue to heat up for a long time, and battery power is saved, thereby improving battery life. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 A three-dimensional diagram of a propeller locking device provided in an embodiment of the present invention;

[0029] Figure 2 A three-dimensional diagram of a stator assembly provided by an embodiment of the present invention;

[0030] Figure 3 A three-dimensional diagram of a rotor assembly provided by an embodiment of the present invention;

[0031] Figure 4 A schematic diagram of a three-dimensional split diagram of a propeller locking device and a drive motor provided in an embodiment of the present invention;

[0032] Figure 5 A schematic three-dimensional assembly diagram of the propeller locking device and the drive motor provided in an embodiment of the present invention.

[0033] Icons: 1. Permanent magnet; 2. Magnetic column; 3. Magnetic exchange coil; 4. First ring plate; 5. Second ring plate; 6. Slide groove; 7. Slider; 8. Spring; 9. Locking column; 10. Locking hole; 11. Rotor upper support; 12. Stator bracket. DETAILED DESCRIPTION

[0034] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Embodiment 1:

[0036] like Figure 1-Figure 5As shown, one embodiment of the present invention provides a propeller locking device for locking a propeller blade connected to a rotating part of a driving motor in an electric aircraft, comprising a stator assembly and a rotor assembly;

[0037] The stator assembly includes a permanent magnet 1 and a magnetization component. The permanent magnet 1 is connected to the fixed part of the drive motor, and the magnetization component is used to magnetize or demagnetize the permanent magnet 1.

[0038] The rotor assembly includes a magnetically conductive column 2 , which is connected to the rotating part of the driving motor, and the magnetically conductive column 2 is arranged opposite to the permanent magnet 1 .

[0039] By setting up the magnetic supply component, the permanent magnet 1 can be magnetized, so that the permanent magnet 1 has magnetism, attracting the magnetic column 2 set opposite to it, so that it cannot rotate relative to the permanent magnet 1. Since the permanent magnet 1 is connected to the fixed part of the drive motor, the rotating part of the drive motor connected to the magnetic column 2 cannot rotate, and then the blades connected to the rotating part of the drive motor cannot rotate, thereby achieving the purpose of locking the propeller. Compared with the traditional propeller locking method, the drive motor does not need to be continuously powered on, so the drive motor will not continue to heat up for a long time, and battery power is saved to improve endurance.

[0040] The magnet supply component can be used to magnetize the permanent magnet 1 so that the permanent magnet 1 attracts the magnetic column 2, and can also demagnetize the permanent magnet 1 so that there is no force between the permanent magnet 1 and the magnetic column 2, which does not affect the drive motor to drive the blade to rotate.

[0041] According to one embodiment of the present invention, the magnetization component includes a power supply and a magnetization coil 3, and the magnetization coil 3 is wound around the circumference of the permanent magnet 1;

[0042] The power supply is electrically connected to the field exchange coil 3 and is used to provide a forward current or a reverse current to the field exchange coil 3 .

[0043] Among them, the power supply is a bidirectional DC power supply, which can provide DC current in both positive and negative directions. The bidirectional DC power supply is a prior art and will not be described in detail here.

[0044] The magnetization supply component is a component that can provide a magnetic field for the permanent magnet 1 .

[0045] The magnetic exchange coil 3 is a conductor with low resistance such as copper or aluminum.

[0046] The permanent magnet 1 and the magnetic column 2 can attract each other. The magnetic column 2 is made of a non-magnetic material that can be attracted by the permanent magnet 1, such as magnetic steel containing iron, cobalt and nickel. The power supply only needs to instantly pass a forward current into the magnetic exchange coil 3 and then turn it off. At this time, the permanent magnet 1 is permanently magnetic after magnetization and can attract the magnetic column 2, so that the magnetic column 2 cannot rotate, and then the rotating part of the drive motor connected to the blade cannot rotate, completing the propeller locking. When there is no need to lock the propeller, the power supply is turned on and a reverse current is passed into the magnetic exchange coil 3 and then turned off. The direction of the magnetic field provided by the magnetic exchange coil 3 is opposite to the direction of the magnetic field of the permanent magnet 1, so that the permanent magnet 1 can be demagnetized, so that there is no force between the permanent magnet 1 and the magnetic column 2. The power supply does not need to be turned on all the time, saving energy. In addition, it will not consume the battery power supplying the drive motor and will not affect the battery life.

[0047] According to an embodiment of the present invention, a plurality of permanent magnets 1 are provided, and the magnetic exchange coils 3 and magnetic conductive columns 2 correspond to the permanent magnets 1 one by one, and the magnetic exchange coils 3 are wound around the corresponding permanent magnets 1 .

[0048] Each permanent magnet 1 corresponds to a magnetic field exchange coil 3, so that the magnetization effect of the permanent magnet 1 can be better.

[0049] It should be noted that the head ends of all the field exchange coils 3 are connected to one input end of the power supply, and the tail ends of all the field exchange coils 3 are connected to the other input end of the power supply, that is, all the field exchange coils 3 are powered in parallel.

[0050] By providing a plurality of permanent magnets 1 and magnetic conductive columns 2, the rotating part of the driving motor can be subjected to more uniform force and better stability when being locked.

[0051] Of course, in this embodiment, one magnetic exchange coil 3 can also correspond to multiple permanent magnets 1 and can also magnetize the permanent magnets 1, which does not deviate from the design concept of the present invention and should therefore fall within the protection scope of the present invention.

[0052] According to one embodiment of the present invention, the rotor assembly is slidably connected to the rotating part of the drive motor through a guide member, and the guide member is used to guide the magnetic column 2 to move only in a direction close to or away from the permanent magnet 1, that is, the guide member can prevent relative rotation between the magnetic column 2 and the rotating part of the drive motor.

[0053] By setting the rotor assembly to be slidably connected to the rotating part of the drive motor, the distance between the magnetic column 2 and the permanent magnet 1 after attraction can be made smaller, the suction force is stronger, and the stability is better, so that the suction force between the magnetic column 2 and the permanent magnet 1 is greater than the rotational force of the blade in the free state, thereby locking the rotating part of the drive motor and completing the locking of the blade.

[0054] According to one embodiment of the present invention, the stator assembly further comprises a first ring plate 4, and the permanent magnet 1 is connected to the first ring plate 4;

[0055] The rotor assembly further includes a second ring plate 5, and the magnetic conductive column 2 is connected to the second ring plate 5;

[0056] The first ring plate 4 is fixedly connected to the fixed part of the driving motor, and the second ring plate 5 is connected to the rotating part of the driving motor.

[0057] Preferably, the first ring plate 4 and the second ring plate 5 are parallel.

[0058] Preferably, a first through hole is provided on the first ring plate 4, and an end of the permanent magnet 1 away from the first ring plate 4 is fixedly connected to a baffle, and a second through hole is provided on the baffle, and the magnetizing coil 3 is tightly wound around the permanent magnet 1, and one end of the magnetizing coil 3 passes through the first through hole and is connected to an input terminal of the power supply, and the other end of the magnetizing coil 3 passes through the second through hole and is connected to another input terminal of the power supply.

[0059] The aperture of the first through hole is smaller than the wire diameter of the field exchange coil 3 , so that the wire body of the field exchange coil 3 can be fixed in the first through hole and the second through hole, thereby fixing the field exchange coil 3 as a whole.

[0060] Of course, in this embodiment, rubber rings can be arranged in the first through hole and the second through hole, which can squeeze and fix the wire body of the field exchange coil 3 without causing damage to the wire body of the field exchange coil 3.

[0061] According to one embodiment of the present invention, the inner side wall of the second ring plate 5 is in contact with the outer side wall of the rotating part of the driving motor;

[0062] The guide member includes a slide groove 6 formed on the inner side wall of the second ring plate 5;

[0063] A sliding block 7 is fixedly connected to the outer side wall of the rotating part of the driving motor, and the sliding block 7 is slidably connected in the sliding groove 6.

[0064] The first ring plate 4 and the second ring plate 5 are both made of aluminum.

[0065] Of course, in this embodiment, a slide groove 6 can be opened on the outer wall of the rotating part of the driving motor, and a slider 7 can be fixedly connected to the inner wall of the second ring plate 5, so that the second ring plate 5 can be slidably connected to the rotating part of the driving motor.

[0066] Preferably, the slide groove 6 is a T-shaped groove, and the slide block 7 is a T-shaped block.

[0067] According to one embodiment of the present invention, the propeller locking device further includes a spring 8, one end of the spring 8 is connected to the second ring plate 5, and the other end of the spring 8 is connected to the rotating part of the driving motor.

[0068] Further, the outer side of the spring 8 is sleeved with a first position-limiting tube, the outer side of the first position-limiting tube is sleeved with a second position-limiting tube, one end of the first position-limiting tube away from the second position-limiting tube is connected to the second ring plate 5, and one end of the second position-limiting tube away from the first position-limiting tube is connected to the rotating part of the driving motor, and the arrangement of the first position-limiting tube and the second position-limiting tube can limit the expansion and contraction direction of the spring 8, so that it can only expand and contract along its length direction, and the length direction of the spring 8 is the same as the length direction of the chute 6, and the length direction of the chute 6 is perpendicular to the first ring plate 4. And the first position-limiting tube and the second position-limiting tube can also play a guiding role and can be used as a guide.

[0069] Of course, in this embodiment, one end of the spring 8 is fixedly connected to the second ring plate 5, and the other end thereof is fixedly connected to the rotating part of the driving motor, and can be connected by screws, by fixing a mounting plate on the rotating part of the driving motor, and opening a first thread groove on the mounting plate, and opening a second thread groove on the second ring plate 5, and both ends of the spring 8 are fixedly connected to a press plate, and threaded holes are opened on both press plates, and the first screw passes through one of the threaded holes and is screwed into the first thread groove, and the second screw passes through the other threaded hole and is screwed into the second thread groove, thereby fixing the spring 8 with the rotating part of the driving motor and the second ring plate 5. The spring 8 can be easily disassembled and replaced, and the practicality is higher.

[0070] According to one embodiment of the present invention, the propeller locking device further includes an auxiliary limiting assembly, which is used to limit the rotation of the rotating part of the drive motor.

[0071] According to one embodiment of the present invention, the auxiliary limiting assembly includes a locking column 9 fixedly connected to the first ring plate 4;

[0072] The second ring plate 5 is provided with a locking hole 10 adapted to the locking column 9 .

[0073] When the permanent magnet 1 absorbs the magnetic column 2, the second ring plate 5 moves on the rotating part of the motor toward the first ring plate 4, that is, the magnetic column 2 moves toward the direction of the permanent magnet 1 corresponding to it. At this time, the spring 8 is in a stretched state, and the locking column 9 on the first ring plate 4 enters into the locking hole 10 opened on the second ring plate 5, limiting the rotating part of the motor by mechanical locking so that it cannot rotate, thereby improving the overall stability.

[0074] It should be noted that when an auxiliary limit assembly is provided, the suction force between the magnetic column 2 and the permanent magnet 1 can be selected in a wider range. The suction force between the magnetic column 2 and the permanent magnet 1 only needs to be able to move the second ring plate 5 toward the first ring plate 4. The locking hole 10 on the second ring plate 5 can be mounted on the corresponding locking column 9. The locking column 9 and the locking hole 10 can prevent the rotating part of the drive motor from rotating, thereby achieving the effect of locking the propeller.

[0075] Preferably, a plurality of locking posts 9 and locking holes 10 are provided, and the locking posts 9 and locking holes 10 correspond one to one. Providing a plurality of groups of locking posts 9 and locking holes 10 can further improve the locking stability.

[0076] Preferably, a permanent magnet 1 is disposed between every two adjacent locking pillars 9 .

[0077] Specifically, since a slider 7 is connected to the outer wall of the rotating part of the driving motor and a slide groove 6 is provided on the inner wall of the second ring plate 5, the second ring plate 5 and the rotating part of the driving motor cannot rotate relative to each other, and the second ring plate 5 can only slide along the length direction of the slider 7. When the propeller needs to be locked, the power supply instantly passes a positive current into the magnetic exchange coil 3 and then is turned off to magnetize the permanent magnet 1. The permanent magnet 1 attracts the magnetic column 2. At this time, the spring 8 is in a stretched state, the second ring plate 5 moves toward the first ring plate 4, and the locking hole 10 is sleeved on the locking column 9, so that the rotating part of the driving motor cannot rotate;

[0078] When there is no need to lock the propeller, the power supply instantly passes a reverse current into the magnetic exchange coil 3 and then is turned off to demagnetize the permanent magnet 1. There is no force between the permanent magnet 1 and the magnetic conductive column 2, and the spring 8 is reset to drive the second ring plate 5 away from the first ring plate 4. The locking hole 10 and the locking column 9 are separated, so that the rotating part of the drive motor in the electric aircraft works normally.

[0079] Embodiment 2:

[0080] An electric aircraft comprises a propeller locking device and a driving motor.

[0081] Specifically, the drive motor has a rotating part and a fixed part, the blades are connected to the rotating part of the drive motor, the rotating part of the drive motor includes a rotor upper support 11, the fixed part of the drive motor includes a stator bracket 12, the first ring plate 4 is fixed to the stator bracket 12, the second ring plate 5 is slidably connected to the rotor upper support 11, and the rotor upper support 11 is fixedly connected with a slider 7. The structure of the drive motor in the electric aircraft is a prior art and will not be described in detail here.

[0082] In the description of the present invention, it should be noted that the terms "upper", "lower", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0083] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the inside of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0084] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A propeller locking device for locking a propeller blade connected to a rotating part of a driving motor in an electric aircraft, characterized in that: including a stator assembly and a rotor assembly; The stator assembly comprises a permanent magnet (1) and a magnetization component, wherein the permanent magnet (1) is connected to a fixed part of the drive motor, and the magnetization component is used to magnetize or demagnetize the permanent magnet (1); The rotor assembly comprises a magnetically conductive column (2), the magnetically conductive column (2) being connected to the rotating part of the driving motor, and the magnetically conductive column (2) being arranged opposite to the permanent magnet (1).

2. A propeller locking device according to claim 1, characterized in that: The magnetization supply component comprises a power source and a magnetization coil (3), wherein the magnetization coil (3) is wound around the circumference of the permanent magnet (1); The power supply is electrically connected to the field exchange coil (3) and is used to provide a forward current or a reverse current to the field exchange coil (3).

3. A propeller locking device according to claim 1, characterized in that: The stator assembly further comprises a first ring plate (4), and the permanent magnet (1) is connected to the first ring plate (4); The rotor assembly further comprises a second ring plate (5), and the magnetic conductive column (2) is connected to the second ring plate (5); The first ring plate (4) is fixedly connected to the fixed part of the drive motor, and the second ring plate (5) is connected to the rotating part of the drive motor.

4. A propeller locking device according to claim 3, characterized in that: The rotor assembly is slidably connected to the rotating part of the driving motor via a guide member, and the guide member is used to guide the magnetic conductive column (2) to move only in a direction approaching or moving away from the permanent magnet (1).

5. A propeller locking device according to claim 4, characterized in that: The inner side wall of the second ring plate (5) is in contact with the outer side wall of the rotating part of the driving motor; The guide member comprises a slide groove (6) formed on the inner side wall of the second ring plate (5); A sliding block (7) is fixedly connected to the outer side wall of the rotating part of the driving motor, and the sliding block (7) is slidably connected in the sliding groove (6).

6. A propeller locking device according to claim 3, characterized in that: The propeller locking device also includes a spring (8), one end of which is connected to the second ring plate (5), and the other end of which is connected to the rotating part of the drive motor.

7. The propeller locking device according to claim 3, characterized in that: The propeller locking device also includes an auxiliary limiting assembly, which is used to limit the rotation of the rotating part of the drive motor.

8. A propeller locking device according to claim 7, characterized in that: The auxiliary limiting assembly comprises a locking column (9) fixedly connected to the first ring plate (4); The second ring plate (5) is provided with a locking hole (10) adapted to the locking column (9).

9. The propeller locking device according to claim 2, characterized in that: A plurality of permanent magnets (1) are provided, and the magnetic exchange coils (3) and the magnetic conductive columns (2) correspond to the permanent magnets (1) one by one. The magnetic exchange coils (3) are wound around the circumference of the corresponding permanent magnets (1).

10. An electric aircraft, characterized in that: It comprises a propeller locking device as described in any one of claims 1-9, and also comprises a driving motor.

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