Small quick-release motor

Abstract

The invention discloses a small quick-release motor, which comprises a circuit board, a rotor and a motor 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); the rotor and the circuit board are oppositely arranged, and the rotor is fixedly connected with the motor shaft; according to the small quick-release motor, firstly, the circuit board serves as a stator, the size and the weight of the motor are reduced under the condition that the power and the rotating speed are guaranteed, meanwhile, the hollow motor shaft is arranged, the quick-release assembly is arranged in the motor shaft in a penetrating mode, and therefore the motor can be quickly disassembled. Therefore, the motor can realize rapid disassembly and assembly of the load.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a small quick-release motor. Background Art

[0002] In some specific scenarios, it is necessary to frequently install and remove loads from the motor's output shaft. Therefore, it is necessary to design a quick-release motor that can quickly install and remove loads. At the same time, while determining the power and speed, the size and weight of the motor should be minimized to reduce the overall size and weight of the device. Summary of the Invention

[0003] In order to address the deficiencies in the prior art, the present invention provides a small quick-release motor. The small quick-release motor first uses a circuit board as a stator, reducing the volume and weight of the motor while ensuring power and speed. At the same time, a hollow motor shaft is provided, and a quick-release component is passed through the inside of the motor shaft, so that the motor can be quickly disassembled and assembled with a load.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] The present invention provides a small quick-release motor, comprising a circuit board, a rotor and a motor shaft, wherein a winding coil is provided on the circuit board, and the circuit board is a PCB printed circuit board;

[0006] The rotor and the circuit board are arranged opposite to each other, and the rotor is fixedly connected to the motor shaft;

[0007] The motor shaft is a hollow shaft, and a quick-release component is movably nested in the motor shaft.

[0008] The small quick-release motor of the present invention uses a circuit board with a wound coil as a stator. Compared with a traditional wound stator, its weight and volume are significantly reduced. At the same time, the motor shaft adopts a hollow shaft, and a quick-release component is nested in the hollow shaft. When in use, the load can be disassembled and assembled using the quick-release component.

[0009] The small quick-release motor of the present invention first uses a circuit board as a stator, reducing the volume and weight of the motor while ensuring power and speed. At the same time, a hollow motor shaft is provided, and a quick-release component is passed through the interior of the motor shaft, so that the motor can be quickly disassembled and assembled with a load.

[0010] In a further technical solution, the rotor includes a back iron and a magnetic steel, and the back iron and the magnetic steel are arranged on both axial sides of the circuit board.

[0011] Rotors are arranged on both sides of the circuit board, so that the motor outputs greater power and a single rotor can be made smaller.

[0012] In a further technical solution, the quick-release assembly includes an operating end and a locking end, the operating end is provided with an operating portion, and the locking end is provided with a locking portion for locking the load.

[0013] In the hollow shaft, by operating the operating part of the operating end, the locking part of the locking end can be used to disassemble and assemble the load, and the separate operation is more convenient.

[0014] In a further technical solution, the quick-release assembly includes a guide shaft coaxial with the motor shaft, the guide shaft is nested inside the motor shaft, the guide shaft is a hollow shaft, and a locking shaft is coaxially sleeved in the guide shaft;

[0015] The operating portion is arranged at one end of the locking shaft, and the locking portion is arranged at the other end of the locking shaft.

[0016] By sequentially nesting the guide shaft and the locking shaft, the operating part can be operated at one end of the locking shaft to enable the locking part to be disassembled and assembled at the other end.

[0017] In a further technical solution, a locking hole is formed on a side wall of an end portion of the guide shaft away from the operating portion, a locking steel ball is movably arranged in the locking hole, and the diameter of the locking steel ball is greater than the wall thickness of the guide shaft;

[0018] The locking portion includes a retraction groove provided at the end of the locking shaft, and the size of the retraction groove matches the locking steel ball. The matching is that it can at least accommodate the volume of the locking steel ball protruding from the locking hole.

[0019] By adjusting the relative position of the locking shaft and the guide shaft, the locking steel ball can be made to protrude from the surface of the guide shaft or retract into the surface of the guide shaft, thereby realizing the disassembly and assembly of the load with high efficiency and simple operation.

[0020] In a further technical solution, an active cavity is provided inside one end of the guide shaft corresponding to the operating portion, at least a portion of the operating portion is placed in the active cavity, and a locking spring is provided between the operating portion and the cavity wall of the active cavity.

[0021] The arrangement of the movable cavity and the locking spring provides the locking shaft with a pre-tightening force, thereby preventing relative movement between the locking shaft and the guide shaft due to gravity or vibration, thereby affecting the connection with the load, and providing higher safety.

[0022] In a further technical solution, the guide shaft extends out of the end of the motor shaft away from the end where the locking hole is provided, and a guide spring is provided between the guide shaft and the end of the motor shaft.

[0023] By setting the guide spring, the guide shaft is given a pre-tightening force, which makes the contact between the locking steel ball and the load tighter, making it easier for the motor shaft to transmit torque to the load.

[0024] In a further technical solution, a support member is fixedly connected to the outer side of one end of the motor shaft away from the operating portion.

[0025] The support member is arranged so that the load is in close contact with the support member when receiving pressure, so as to receive the torque transmitted by the motor shaft.

[0026] In a further technical solution, an upper shell and a lower shell are respectively provided along the axial direction of the motor shaft, and the upper shell and the lower shell are respectively rotatably connected to the motor shaft through bearings. The rotor and the circuit board are both arranged in the cavity formed by the upper shell and the lower shell, and the circuit board is clamped and fixed by the upper shell and the lower shell.

[0027] By providing a split housing, it is convenient to position and fix the circuit board.

[0028] In a further technical solution, a limiting ring is arranged between the two rotors, and the limiting ring is sleeved outside the motor shaft. The two rotors respectively abut against the axial ends of the limiting ring. A through hole is opened in the middle of the circuit board, and the motor shaft and the limiting ring both pass through the through hole.

[0029] The setting of the limiting ring can limit the axial position of the two rotors, ensure the stability of the axial distance between the rotor and the circuit board, and ensure the output effect of the motor.

[0030] The beneficial effects are:

[0031] 1. The small quick-release motor of the present invention first uses a circuit board as a stator, reducing the volume and weight of the motor while ensuring power and speed. At the same time, a hollow motor shaft is provided, and a quick-release component is inserted inside the motor shaft, so that the motor can be quickly disassembled and assembled with a load.

[0032] 2. Rotors are set on both sides of the circuit board, so that the motor output power is greater and the single rotor can be made smaller.

[0033] 3. In the hollow shaft, by operating the operating part of the operating end, the locking part of the locking end can be used to disassemble and assemble the load, making the separate operation more convenient.

[0034] 4. By nesting the guide shaft and locking shaft in sequence, the operating part can be operated at one end of the locking shaft to enable the locking part to be disassembled and assembled at the other end.

[0035] 5. By adjusting the relative position of the locking shaft and the guide shaft, the locking steel ball can be made to protrude from the surface of the guide shaft or retract into the surface of the guide shaft, thereby realizing the disassembly and assembly of the load with high efficiency and simple operation.

[0036] 6. The setting of the movable cavity and the locking spring gives the locking shaft a pre-tightening force, thereby avoiding relative movement between the locking shaft and the guide shaft due to gravity or vibration, thereby affecting the connection with the load, and providing higher safety.

[0037] 7. By setting the guide spring, the guide shaft has a pre-tightening force. This pre-tightening force makes the contact between the locking steel ball and the load closer, making it easier for the motor shaft to transmit torque to the load.

[0038] 8. The support is set so that the load is close to the support when receiving pressure to receive the torque transmitted by the motor shaft.

[0039] 9. By setting up a split shell, it is convenient to position and fix the circuit board.

[0040] 10. The setting of the limiting ring can limit the axial position of the two rotors, ensuring the stability of the axial distance between the rotor and the circuit board, and ensuring the output effect of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 2 is a schematic structural diagram of a small quick-release motor according to an embodiment of the present invention;

[0042] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure at AA in the middle;

[0043] Figure 3 1 is a schematic structural diagram of a quick-release assembly of a small quick-release motor according to an embodiment of the present invention;

[0044] Figure 4 yes Figure 3 Schematic diagram of the enlarged structure at B in the middle;

[0045] Figure 5 1 is a structural diagram of the loading process of assembling a small quick-release motor according to an embodiment of the present invention;

[0046] Figure 6 Schematic diagram of the structure of the assembly load of the small quick-release motor according to an embodiment of the present invention.

[0047] 10. Motor shaft; 11. Rotor; 12. Circuit board; 13. Support member; 14. Limiting ring; 20. Housing; 21. Upper housing; 22. Lower housing; 30. Quick release assembly; 31. Guide shaft; 311. Movable cavity; 312. Locking hole; 313. Locking steel ball; 32. Locking shaft; 321. Operating part; 322. Retraction groove; 33. Guide spring; 34. Locking spring; 40. Load plate. DETAILED DESCRIPTION

[0048] The present invention will be further described below in conjunction with the accompanying drawings:

[0049] Example:

[0050] A small quick-release motor, such as Figure 1 and Figure 2 As shown, it includes a circuit board 12, a rotor 11 and a motor shaft 10, a winding coil is provided on the circuit board 12, and the circuit board 12 is a PCB printed circuit board;

[0051] The rotor 11 and the circuit board 12 are arranged opposite to each other, and the rotor 11 is fixedly connected to the motor shaft 10;

[0052] The motor shaft 10 is a hollow shaft, and a quick-release assembly 30 is movably nested in the motor shaft 10 .

[0053] It should be noted that the PCB printed circuit board is used as the stator, and the wound coils thereon generate current and magnetic field, which plays the same role as the traditional wound stator, and the magnetic field generated by it can also drive the rotor 11 to rotate.

[0054] The small quick-release motor of the present invention uses a circuit board 12 with a wound coil as a stator. Compared with a traditional wound stator, its weight and volume are significantly reduced. At the same time, the motor shaft 10 adopts a hollow shaft, and a quick-release component 30 is nested in the hollow shaft. When in use, the load can be disassembled and assembled through the quick-release component 30.

[0055] The small quick-release motor of the present invention first uses the circuit board 12 as the stator, reducing the volume and weight of the motor while ensuring the power and speed. At the same time, a hollow motor shaft 10 is provided, and a quick-release assembly 30 is passed through the interior of the motor shaft 10, so that the motor can be quickly disassembled and assembled with a load.

[0056] In addition to the convenience of disassembling and assembling the load, the motor of this embodiment also has the advantages of small size and weight. The hollow shaft combined with the quick-release design also has the advantage of compact structure, and the size of the entire machine is smaller.

[0057] In another embodiment, Figure 2 As shown, the rotor 11 includes a back iron and a magnetic steel, and the back iron and the magnetic steel are arranged on both axial sides of the circuit board 12.

[0058] The rotors 11 are respectively arranged on both sides of the circuit board 12, so that the power output of the motor is greater and the single rotor 11 can be made smaller.

[0059] In another embodiment, Figure 3 As shown, the quick release assembly 30 includes an operating end and a locking end. The operating end is provided with an operating portion 321 , and the locking end is provided with a locking portion for locking a load.

[0060] In the hollow shaft, by operating the operating portion 321 of the operating end, the locking portion of the locking end can be used to disassemble and assemble the load, making the separate operation more convenient.

[0061] In another embodiment, Figure 3 and Figure 4 As shown, the quick-release assembly 30 includes a guide shaft 31 coaxial with the motor shaft 10. The guide shaft 31 is nested inside the motor shaft 10. The guide shaft 31 is a hollow shaft. A locking shaft 32 is coaxially sleeved inside the guide shaft 31.

[0062] The operating portion 321 is provided at one end of the locking shaft 32 , and the locking portion is provided at the other end of the locking shaft 32 .

[0063] By sequentially nesting the guide shaft 31 and the locking shaft 32 , the operating portion 321 can be operated at one end of the locking shaft 32 to enable the locking portion to be disassembled and assembled at the other end.

[0064] In another embodiment, Figure 3 and Figure 4 As shown, a locking hole 312 is formed on the side wall of the guide shaft 31 at one end away from the operating portion 321. A locking steel ball 313 is movably disposed in the locking hole 312. The diameter of the locking steel ball 313 is greater than the wall thickness of the guide shaft 31.

[0065] The locking portion includes a retraction groove 322 provided at the end of the locking shaft 32 . The size of the retraction groove 322 matches the locking steel ball 313 , and is matched to at least accommodate the volume of the locking steel ball 313 protruding from the locking hole 312 .

[0066] By adjusting the relative position of the locking shaft 32 and the guide shaft 31 , the locking steel ball 313 can be made to protrude from or retract into the surface of the guide shaft 31 , thereby achieving the disassembly and assembly of the load with high efficiency and simple operation.

[0067] In this embodiment, the complete load assembly and disassembly process is introduced:

[0068] First, if Figure 5 and Figure 6 As shown, the motor in this embodiment is a medical centrifuge motor, and its load is a load plate 40. A hole for the guide shaft 31 to pass through is opened on one side of the load plate 40, and a recess corresponding to the locking steel ball 313 is opened on the inner wall of the hole.

[0069] The load plate 40 is placed at one end of the guide shaft 31, as shown in FIG. Figure 5As shown, by pressing down the operating portion 321, the guide shaft 31 and the locking shaft 32 move within the motor shaft 10. At the same time, by adjusting the position of the locking shaft 32, the retraction groove 322 on the locking shaft 32 is aligned with the locking steel ball 313 on the guide shaft 31. Therefore, when the guide shaft 31 enters the hole on the load disk 40, the edge of the hole on the load disk 40 applies inward pressure to the locking steel ball 313, causing the locking steel ball 313 to move toward the retraction groove 322. After the locking steel ball 313 retracts into the locking hole 312, the guide shaft 31 can enter the hole on the load disk 40.

[0070] Then, when the guide shaft 31 enters the deepest part of the hole on the load plate 40, the recessed position of the hole on the load plate 40 is aligned with the locking steel ball 313. At this time, the operating part 321 is retracted, and the locking shaft 32 is retracted. Figure 6 As shown, as the locking shaft 32 retracts, the edge of the retraction groove 322 drives the locking steel ball 313 to extend out of the locking hole 312 again. At this time, the locking steel ball 313 extends out of the locking hole 312 and enters the recess on the load plate 40 and is stuck. Since there is insufficient clearance between the surface of the locking shaft 32 and the inner wall of the guide shaft 31 at this time, the locking steel ball 313 can no longer move, and the load plate 40 is also stuck on the guide shaft 31 due to the presence of the locking steel ball 313. This is the assembly process.

[0071] During removal, the operating portion 321 is pressed to move the locking shaft 32. When the retraction groove 322 on the locking shaft 32 is aligned with the retracting steel ball, the load plate 40 can be removed. The pressure during removal of the load plate 40 forces the locking steel ball 313 back into the retraction groove 322. Subsequently, there is no resistance to the removal of the load plate 40. At the same time, the locking shaft 32 and the guide shaft 31 can also be retracted from the hole in the load plate 40 and reset.

[0072] exist Figure 3 and Figure 4 In order to show the structure, only one locking steel ball 313 is shown. It can be understood that the number of locking steel balls 313, retraction grooves 322, and locking holes 312 can be more to enhance the connection strength.

[0073] In another embodiment, Figure 2 、 Figure 3 、 Figure 5 and Figure 6 As shown, an active cavity 311 is provided inside one end of the guide shaft 31 corresponding to the operating portion 321 , at least a portion of the operating portion 321 is placed in the active cavity 311 , and a locking spring 34 is provided between the operating portion 321 and the cavity wall of the active cavity 311 .

[0074] The setting of the movable cavity 311 and the locking spring 34 provides the locking shaft 32 with a pre-tightening force, thereby preventing relative movement between the locking shaft 32 and the guide shaft 31 due to gravity or vibration, etc., causing the retraction groove 322 to be flush with the locking steel ball 313, causing the locking steel ball 313 to fall off, thereby affecting the connection with the load, and providing higher safety.

[0075] At the same time, the operating part 321 is partially placed in the active cavity 311, and the part protruding from the active cavity 311 facilitates the user's operation. In addition, the front and rear walls of the active cavity 311 itself can also limit the operation of the operating part 321. In the tight state, the retraction groove 322 is just flush with the locking steel ball 313.

[0076] In another embodiment, Figure 1 、 Figure 2 、 Figure 3 、 Figure 5 and Figure 6 As shown, the guide shaft 31 extends out of the end of the motor shaft 10 away from the end where the locking hole 312 is provided, and a guide spring 33 is provided between the guide shaft 31 and the end of the motor shaft 10 .

[0077] By providing the guide spring 33 , the guide shaft 31 is provided with a pre-tightening force, which makes the contact between the locking steel ball 313 and the load tighter, making it easier for the motor shaft 10 to transmit the torque to the load.

[0078] In another embodiment, Figure 1 、 Figure 2 、 Figure 5 and Figure 6 As shown, a support member 13 is fixedly connected to the outer side of one end of the motor shaft 10 away from the operating portion 321 .

[0079] The support member 13 is provided so that the load is pressed against the support member 13 when receiving pressure, so as to receive the torque transmitted by the motor shaft 10 .

[0080] It is understandable that when the locking steel ball 313 is clamped on the load plate 40, the preload force of the guide shaft 31 will drive the load plate 40 to move toward the motor shaft 10. Therefore, the support member 13 is specially provided. The preload force causes the load plate 40 to contact the support member 13, and the support member 13 will rotate with the rotation of the motor shaft 10, thereby driving the load plate 40 to rotate.

[0081] In another embodiment, Figure 1 and Figure 2As shown, an upper shell 21 and a lower shell 22 are respectively sleeved along the axial direction of the motor shaft 10. The upper shell 21 and the lower shell 22 are respectively rotatably connected to the motor shaft 10 through bearings. The rotor 11 and the circuit board 12 are both arranged in the cavity closed by the upper shell 21 and the lower shell 22. The circuit board 12 is clamped and fixed by the upper shell 21 and the lower shell 22.

[0082] By providing a split housing, it is convenient to position and fix the circuit board 12.

[0083] In another embodiment, Figure 2 As shown, a limit ring 14 is provided between the two rotors 11. The limit ring 14 is sleeved on the outside of the motor shaft 10. The two rotors 11 are respectively against the axial ends of the limit ring 14. A through hole is opened in the middle of the circuit board 12, and the motor shaft 10 and the limit ring 14 both pass through the through hole.

[0084] The setting of the limiting ring 14 can limit the axial position of the two rotors 11, ensure the stability of the axial distance between the rotor 11 and the circuit board 12, and ensure the output effect of the motor.

[0085] In another embodiment, the circuit board 12 uses a multi-layer circuit board 12, which is formed by pressing together multiple single-layer circuit boards 12. Compared with the single-layer circuit board 12, the coil wire passing area of ​​the multi-layer circuit board 12 is larger, which can allow a larger current to pass through, generate a stronger magnetic field, and thus obtain greater power.

[0086] In another embodiment, Figure 2 As shown, outside the bearing connecting the upper cover 21 and the motor shaft 10, there is also a wave washer, which is arranged between the bearing and the end face of the upper cover 21. The arrangement of the wave washer can reduce the axial movement of the motor shaft during the operation of the rotor and reduce noise.

[0087] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the invention as claimed.

Claims

1. A small quick-release motor, characterized in that: It includes a circuit board, a rotor and a motor shaft, wherein the circuit board is provided with a winding coil, and the circuit board is a PCB printed circuit board; The rotor and the circuit board are arranged opposite to each other, and the rotor is fixedly connected to the motor shaft; The motor shaft is a hollow shaft, and a quick-release component is movably nested in the motor shaft.

2. The small quick-release motor according to claim 1, characterized in that: The rotor includes a back iron and a magnetic steel, and the back iron and the magnetic steel are arranged on both axial sides of the circuit board.

3. The small quick-release motor according to claim 1, characterized in that: The quick-release assembly includes an operating end and a locking end. The operating end is provided with an operating portion, and the locking end is provided with a locking portion for locking a load.

4. The small quick-release motor according to claim 3, characterized in that: The quick-release assembly includes a guide shaft coaxial with the motor shaft, the guide shaft is nested inside the motor shaft, the guide shaft is a hollow shaft, and a locking shaft is coaxially sleeved inside the guide shaft; The operating portion is arranged at one end of the locking shaft, and the locking portion is arranged at the other end of the locking shaft.

5. The small quick-release motor according to claim 4, characterized in that: The guide shaft has a locking hole on its side wall at one end away from the operating portion, a locking steel ball is movably arranged in the locking hole, and the diameter of the locking steel ball is greater than the wall thickness of the guide shaft; The locking portion includes a retraction groove provided at the end of the locking shaft, and the size of the retraction groove matches the locking steel ball. The matching is that it can at least accommodate the volume of the locking steel ball protruding from the locking hole.

6. The small quick-release motor according to claim 5, characterized in that: An active cavity is provided inside one end of the guide shaft corresponding to the operating portion, at least a portion of the operating portion is placed in the active cavity, and a locking spring is provided between the operating portion and a cavity wall of the active cavity.

7. The small quick-release motor according to claim 6, characterized in that: The guide shaft extends out of the end of the motor shaft away from the end where the locking hole is provided, and a guide spring is provided between the guide shaft and the end of the motor shaft.

8. The small quick-release motor according to claim 7, characterized in that: A support is fixedly connected to the outer side of one end of the motor shaft away from the operating portion.

9. The small quick-release motor according to claim 1, characterized in that: An upper shell and a lower shell are respectively sleeved along the axial direction of the motor shaft. The upper shell and the lower shell are respectively rotatably connected to the motor shaft through bearings. The rotor and the circuit board are both arranged in the cavity formed by the upper shell and the lower shell. The circuit board is clamped and fixed by the upper shell and the lower shell.

10. The small quick-release motor according to claim 2, characterized in that: A limiting ring is provided between the two rotors, and the limiting ring is sleeved outside the motor shaft. The two rotors respectively abut against the axial ends of the limiting ring. A through hole is opened in the middle of the circuit board, and the motor shaft and the limiting ring both pass through the through hole.

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