A motor shaft quick-detachable motor

Abstract

The present invention relates to the technical field of motors, and discloses a motor shaft quick-release motor, comprising a stator, a rotor coaxially mounted in the stator, an axial hole penetrating the rotor, an inner wall of the axial hole being provided with two or more limit grooves in a circumferential direction, bayonet holes being provided at both ends of the limit grooves, a motor shaft being coaxially arranged in the axial hole, a buckle being provided in the circumferential direction of the motor shaft, and a centrifugal clamping plate being slidably mounted in the buckle; the present invention simplifies the installation of the motor shaft and the rotor, realizes the quick-release function, and has the characteristics of self-locking and adaptive adjustment of axial restraining force, and at the same time, only when the motor is completely stopped, the centrifugal clamping plate will be pulled into the buckle structure by the elastic component, and the motor shaft can be disassembled at this time, so that the motor shaft can be prevented from falling off due to accidental operation during the rotation of the motor shaft and the user can be prevented from trying to disassemble the motor shaft when the motor is running, resulting in equipment failure or personal injury.

Description

Technical Field

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

[0002] The stator permanent magnet brushless motor generates a strong electromagnetic torque through the interaction between the armature winding and the permanent magnet on the stator, driving the motor to operate efficiently and stably. It has a compact structure, light weight, high power density, high efficiency and excellent fault tolerance. In addition, this type of motor has extremely high control flexibility and can easily achieve wide range speed regulation to meet the needs of various complex working conditions.

[0003] However, stator permanent magnet brushless motors often need to rely on additional speed measurement tools to measure the speed. During motor operation, the motor's operating status cannot be directly observed. Secondly, in terms of the installation and removal of the motor shaft, since the motor shaft and the motor housing, rotor and other components are usually connected by tight fit or key, the installation and removal process often requires the use of professional tools and skills. This inconvenience of traditional motors is particularly prominent in some environments where the motor shaft needs to be frequently disassembled. Summary of the invention

[0004] (I) Technical problems to be solved: In view of the deficiencies in the prior art, the present invention provides a motor with a motor shaft quick-release, which has the advantages of intuitive speed measurement and quick release of the motor shaft, and solves the problem that the motor shaft is cumbersome to disassemble and the running status of the motor cannot be intuitively observed during operation, and the speed needs to be measured with the help of other tools.

[0005] (ii) Technical solution: To achieve the above-mentioned purposes of direct speed measurement and quick release of the motor shaft, the present invention provides the following technical solution: a motor shaft quick-release motor, comprising a stator, a rotor coaxially mounted in the stator, a winding arranged in the stator, a permanent magnet arranged on the rotor, an axial hole penetrating the rotor, two or more groups of limiting grooves arranged in the circumferential direction of the inner wall of the axial hole, bayonet holes arranged at both ends of the limiting groove, the depth of the bayonet holes being less than the depth of the limiting groove, a motor shaft coaxially arranged in the axial hole, a buckle protruding from the buckle matching the buckle arranged in the circumferential direction of the motor shaft, a centrifugal clamping plate slidably mounted in the clamping plate, the telescopic distance and width of the centrifugal clamping plate respectively matching the depth and width of the limiting groove, the bottom of the centrifugal clamping plate being connected to the motor shaft by an elastic component; when the motor shaft rotates, the centrifugal clamping plate slides toward the limiting groove under the influence of centrifugal force.

[0006] Preferably, the bayonet is made of a transparent material, and the centrifugal clamping plate is made of a material with a high-contrast color coated on its surface.

[0007] Preferably, the rotor surface is also fixedly equipped with an annular fan blade 1, and the rotor surface is provided with a negative pressure hole penetrating its axial surface, and a plurality of negative pressure holes are provided along the circumferential direction of the rotor, and the negative pressure holes are connected to a negative pressure groove, and an elastic sealing ring is arranged between the axial direction of the motor shaft and the rotor, and the elastic sealing ring forms a gap between the inner end surface of the rotor and the inner end surface of the motor shaft, and the gap is connected with the negative pressure groove. When the rotor rotates, the annular fan blade 1 generates negative pressure in the negative pressure groove, and the elastic sealing ring is pressed tightly by the negative pressure between the motor shaft and the rotor.

[0008] Preferably, the end face of the motor shaft is also equipped with an annular fan blade 2, and the surface of the motor shaft is also provided with a plurality of boost holes, and the inside of the boost holes is provided with a plurality of annular grooves connected with the sliding position of the centrifugal clamping plate at equal intervals. When the motor shaft rotates, the annular fan blade 2 forms a positive pressure in the boost holes and the annular grooves, and the centrifugal clamping plate is pushed by the pressure to move toward the inside of the limit groove.

[0009] Preferably, a shell is fixedly provided on the stator, the shell is rotatably connected to the rotor, the front and rear end surfaces of the shell are connected to the rotor by bearings, and the rear end of the shell is rotatably connected to the motor shaft.

[0010] Preferably, a sealing cover is provided on the rear end surface of the housing, and the sealing cover is rotatably connected to the motor shaft.

[0011] Preferably, the diameter of the negative pressure groove is larger than the diameter of the motor shaft, and the diameter of the elastic sealing ring is larger than the diameter of the motor shaft.

[0012] Preferably, the cross-sectional shape of the end face of the rotor in contact with the annular blade is conical.

[0013] Preferably, the cross-sectional shape of the end surface where the motor shaft contacts the annular fan blade is conical.

[0014] (III) Beneficial effects: Compared with the prior art, the present invention provides a motor shaft quick-release motor having the following beneficial effects: 1. The motor shaft quick-release motor, through the coordinated use of the centrifugal clamping plate structure and the bayonet structure, can intuitively observe the rotation speed of the motor shaft through the expansion and contraction amount of the centrifugal clamping plate during the rotation of the motor. Since the surface of the centrifugal clamping plate is coated with a high-contrast color material and the bayonet is made of a transparent material, the material color of the centrifugal clamping plate will pass through the bayonet during the rotation of the motor shaft. Since the centrifugal clamping plate rotates with the motor shaft and the rotor, this color display will form a dynamic circular ring effect. By observing the diameter of this circular ring, the rotation speed of the motor shaft at this time can be intuitively estimated. This structure provides a simple and effective speed measurement method without the need for additional speed measurement tools.

[0015] 2. The motor shaft quick-release motor simplifies the installation between the motor shaft and the rotor through the coordinated use of the bayonet structure, the buckle structure, and the centrifugal clamping plate structure, so that the motor can realize the quick release of the motor shaft. In the process of rotation of the motor shaft, the centrifugal clamping plate, the limit groove and the bayonet form a self-locking, which prevents the motor shaft from slipping axially during rotation. At the same time, the motor shaft can also automatically adjust the axial restraint force between itself and the rotor according to the size of its rotation speed. As the motor speed increases, the centrifugal force on the centrifugal clamping plate increases, thereby strengthening the axial restraint force. This adaptive adjustment mechanism is very effective when running at high speed. The enhanced restraining force can ensure a tight connection between the motor shaft and the rotor, optimize the torque transmission performance, and prevent the motor shaft from axial slippage. When running at low speed, the axial restraining force is small, which reduces unnecessary friction loss and helps to improve the efficiency of the motor. At the same time, only when the motor stops completely will the centrifugal clamping plate be pulled into the buckle structure by the elastic component. Only then can the motor shaft be disassembled. Therefore, it can avoid the motor shaft from falling off due to accidental operation during the rotation of the motor shaft and prevent the user from trying to disassemble the motor shaft while the motor is running, resulting in equipment failure or personal injury.

[0016] 3. The motor shaft quick-detachable motor is used in conjunction with the annular fan blade structure 1 and the annular fan blade structure 2. When the motor is running, the wind direction generated by the annular fan blade 1 is to the left, which will extract the gas in the negative pressure hole to form a negative pressure in the negative pressure hole and the negative pressure groove, so that the gap between the motor shaft and the inside of the rotor is compressed, thereby generating additional axial compression force between the motor shaft and the rotor. This structure will increase the contact tightness between the motor shaft and the rotor, improve the stability of rotation, and the higher the rotor speed, the greater the negative pressure generated. The greater the negative pressure can generate a stronger inward pulling force, which can further reduce The gap between the motor shaft and the rotor is reduced, thereby reducing the shaking of the motor shaft during high-speed rotation, ensuring the operating efficiency and stability of the motor. The wind direction generated by the second annular fan blade is to the right, which will increase the pressure in the annular groove, thereby pushing the centrifugal clamping plate, so that the centrifugal clamping plate can be inserted into the limit groove at a low speed, reducing the speed required for the centrifugal clamping plate to insert the limit groove. Reducing the speed required for the centrifugal clamping plate to insert the limit groove allows the motor to achieve stable axial limit at a lower speed, which can broaden the application range of the motor, especially in situations where low-speed stable operation or frequent start and stop are required. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the motor shaft quick-release motor in the present invention.

[0018] Figure 2 It is a structural front view of the motor shaft quick-detachable motor in the present invention.

[0019] Figure 3It is a structural side view of the motor shaft quick-detachable motor in the present invention.

[0020] Figure 4 It is a top view of the structure of the motor shaft quick-detachable motor in the present invention.

[0021] Figure 5 for Figure 4 AA section view.

[0022] Figure 6 for Figure 5 A partial enlarged view of the centrifugal clamping plate when the motor shaft is rotating N.

[0023] Figure 7 This is a schematic diagram of the position of the centrifugal clamping plate when the motor shaft is not rotating.

[0024] Figure 8 for Figure 5 Partially enlarged view M.

[0025] Fig. 9 It is a schematic diagram of the conical structure of the negative pressure hole and the boost hole.

[0026] In the figure: 1. stator; 2. rotor; 21. limit groove; 22. bayonet; 23. negative pressure hole; 24. negative pressure groove; 3. motor shaft; 31. buckle; 32. centrifugal clamp; 33. elastic component; 34. boost hole; 35. annular groove; 4. annular blade one; 5. annular blade two; 6. elastic sealing ring; 7. outer shell; 71. sealing cover. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not 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.

[0028] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7A motor shaft quick-release motor includes a stator 1, a rotor 2 is coaxially mounted in the stator 1, a winding is arranged in the stator 1, a permanent magnet is arranged on the rotor 2, and an axial hole penetrating the rotor 2 is also provided on the rotor 2, and two or more groups of limiting grooves 21 are provided in the circumferential direction of the inner wall of the axial hole. The purpose of providing two or more groups of limiting grooves 21 in the circumferential direction of the inner wall of the axial hole is to provide multiple fixing points to achieve more stable axial limiting. Multiple limiting grooves 21 can disperse the force on the motor shaft 3 and improve the overall structural strength and stability. Bayonet 22 is provided at both ends of the limiting groove 21, and the depth of the bayonet 22 is less than the depth of the limiting groove 21. Bayonet 22 is provided at both ends of the limiting groove 21, and the depth of the bayonet 22 is less than the depth of the limiting groove 21. Such a design makes the centrifugal clamping plate 32 axially limited by the bayonet 22 when inserted into the limiting groove 21, thereby further locking the motor shaft 3 to prevent it from axially sliding during operation. The motor shaft 3 is also coaxially arranged in the shaft hole, and a buckle 31 that matches the bayonet 22 is arranged in the circumferential direction of the motor shaft 3. The motor shaft 3 is provided with a raised buckle 31 that matches the bayonet 22 in the circumferential direction, which is to ensure that the motor shaft 3 can be accurately positioned and fixed in the rotor 2. A centrifugal clamping plate 32 is slidably assembled in the buckle 31, and a centrifugal clamping plate 32 is slidably assembled in the buckle 31. Using the principle of centrifugal force, when the motor shaft 3 rotates, the centrifugal clamping plate 32 will slide toward the limiting groove 21. The telescopic distance and width of the centrifugal clamping plate 32 are matched with the depth and width of the limiting groove 21 respectively, ensuring that the centrifugal clamping plate 32 can fully enter the limiting groove 21 during the rotation process, and effective fixation is achieved. The bottom of the centrifugal clamping plate 32 is connected to the motor shaft 3 by an elastic component 33, and the bottom of the centrifugal clamping plate 32 is connected to the motor shaft 3 by an elastic component 33. The elastic component 33 provides a return force so that the centrifugal clamping plate 32 can be retracted when the motor stops. This design ensures that the motor shaft 3 can be easily disassembled when it stops. The elastic component 33 needs to be made of a material that is not affected by magnets to avoid electromagnetic interference when the motor is working. Commonly used materials include rubber, silicone or non-magnetic metal springs, which can provide sufficient elasticity and durability and are not affected by magnetic fields; when the motor shaft 3 rotates, the centrifugal clamping plate 32 slides toward the limit groove 21 under the influence of centrifugal force.

[0029] See also Figure 2 , Figure 5, the bayonet 22 is made of transparent material, and the bayonet 22 is made of transparent material. This design is to enable the color of the centrifugal card plate 32 to be visually observed when the motor is running. By observing the color changes shown in the bayonet 22, a simple estimation of the rotation speed of the motor shaft 3 can be achieved, thereby providing a direct visual feedback. The transparent material specifically adopts transparent plastics, such as polycarbonate, polypropylene, etc., which have sufficient transparency and can withstand the temperature and mechanical stress when the motor is running to a certain extent. The centrifugal card plate 32 adopts a surface coating with a high-contrast color material. In this way, the color of the centrifugal card plate 32 can be clearly seen through the transparent bayonet 22 during the operation of the motor. The high-contrast color helps to form an obvious dynamic ring effect, which is convenient for observing and estimating the motor speed. The high-contrast color material specifically adopts plastic coatings of various colors, metal coatings (such as aluminum, stainless steel, etc., which have been specially color-treated) and some special coatings or inks.

[0030] See also Figure 1 , Figure 2 , Figure 5 , Figure 6 , Figure 7 and Figure 8 , the surface of the rotor 2 is also fixedly equipped with an annular fan blade 4. The annular fan blade 4 is fixedly equipped on the surface of the rotor 2 to generate air flow when the motor is running, thereby forming a negative pressure in the negative pressure groove 24. This negative pressure can enhance the contact between the motor shaft 3 and the rotor 2, increase the axial clamping force, and improve the running stability of the motor. The surface of the rotor 2 is provided with a negative pressure hole 23 that runs through its axial surface, and a number of negative pressure holes 23 are provided along the circumferential direction of the rotor 2. The surface of the rotor 2 is provided with a negative pressure hole 23 that runs through its axial surface, and a plurality of negative pressure holes 23 are provided along the circumferential direction of the rotor 2. This is to quickly discharge air through the action of the annular fan blade 4 when the rotor 2 rotates at a high speed, thereby forming a negative pressure in the negative pressure groove 24. The negative pressure hole 23 is connected to the negative pressure groove 24. The design of the negative pressure hole 23 connected to the negative pressure groove 24 is to transfer the negative pressure formed in the negative pressure hole 23 to a larger area, thereby increasing the compression effect of the negative pressure on the gap between the motor shaft 3 and the rotor 2. This design can more effectively reduce the shaking of the motor shaft 3 during high-speed rotation. An elastic sealing ring 6 is arranged between the motor shaft 3 and the rotor 2 in the axial direction. The elastic sealing ring 6 forms a gap between the inner end surface of the rotor 2 and the inner end surface of the motor shaft 3. The gap is connected to the negative pressure groove 24. The elastic sealing ring 6 is used to transfer the negative pressure to the gap between the motor shaft 3 and the rotor 2 when the annular fan blade 1 4 generates negative pressure. This design can further compress the gap and increase the contact tightness and rotation stability between the motor shaft 3 and the rotor 2. At the same time, the elastic sealing ring 6 can also play a sealing role. When the rotor 2 rotates, the annular fan blade 1 4 generates negative pressure in the negative pressure groove 24. The elastic sealing ring 6 is pressed tightly by the negative pressure between the motor shaft 3 and the rotor 2. The wind direction generated by the annular fan blade 2 5 is as follows. Figure 6 As shown by the arrow in the middle. The end face of the motor shaft 3 is also equipped with an annular fan blade 25. The annular fan blade 25 is designed to be equipped on the end face of the motor shaft 3 in order to change the pressure in the supercharging hole 34 and the annular groove 35 by utilizing the wind direction generated when it rotates. When the annular fan blade 25 rotates, it will cause the surrounding air to flow, thereby forming a positive pressure in the supercharging hole 34 and the annular groove 35 connected thereto. This positive pressure can push the centrifugal clamping plate 32 to move inwardly toward the limiting groove 21, which helps to achieve the axial limit of the motor shaft 3 at a low speed. The surface of the motor shaft 3 is also provided with a plurality of supercharging holes 34, and the inside of the supercharging holes 34 is equidistantly provided with a plurality of annular grooves 35 connected to the sliding position of the centrifugal clamping plate 32. The supercharging holes 34 on the surface of the motor shaft 3 and the annular grooves 35 therein are designed to provide a channel for pressure transmission. When the annular fan blade 25 rotates to generate positive pressure, this positive pressure can be transmitted to the centrifugal clamping plate 32 through the supercharging hole 34 and the annular groove 35. Since the annular groove 35 is connected to the sliding position of the centrifugal clamp plate 32, the positive pressure can push the centrifugal clamp plate 32 to move inwardly of the limiting groove 21, thereby achieving axial limitation of the motor shaft 3. When the motor shaft 3 rotates, the annular fan blade 25 forms a positive pressure in the boost hole 34 and the annular groove 35, and the centrifugal clamp plate 32 is pushed by the pressure to move inwardly of the limiting groove 21. This design is intended to achieve axial limitation of the motor shaft 3 at low speeds. When the motor shaft 3 rotates, the wind direction generated by the annular fan blade 25 will form a positive pressure in the boost hole 34 and the annular groove 35. This positive pressure will push the centrifugal clamp plate 32 to move inwardly of the limiting groove 21, thereby increasing the axial clamping force between the motor shaft 3 and the rotor 2. This structure helps to maintain stable axial limitation even when the motor rotates at low speeds. The wind direction generated by the annular fan blade 25 is as follows: Figure 6 Indicated by the arrow.

[0031] See also Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6, a housing 7 is fixedly arranged on the stator 1, and the housing 7 is rotatably connected to the rotor 2. The housing 7 is designed and fixedly arranged on the stator 1 to protect the internal parts of the motor from interference and damage from the external environment. The rotational connection between the housing 7 and the rotor 2 allows the rotor 2 to rotate freely inside the stator 1, thereby realizing the normal operation of the motor. The front and rear end faces of the housing 7 are connected to the rotor 2 by bearings, and the rear end of the housing 7 is rotatably connected to the motor shaft 3. The use of bearings to connect the front and rear end faces of the housing 7 and the rotor 2 is to reduce friction and wear during the rotation process and improve the operating efficiency and stability of the motor. At the same time, the rotational connection between the rear end of the housing 7 and the motor shaft 3 allows the motor shaft 3 to be easily disassembled and replaced when necessary. A sealing cover 71 is provided on the rear end face of the housing 7, and the sealing cover 71 is rotatably connected to the motor shaft 3. The sealing cover 71 is designed to prevent external impurities such as dust and moisture from entering the motor, thereby protecting the internal parts of the motor from damage. The diameter of the negative pressure groove 24 is larger than the diameter of the motor shaft 3, and the diameter of the elastic sealing ring 6 is larger than the diameter of the motor shaft 3. This ensures that the negative pressure groove 24 can effectively extract the gas in the negative pressure hole 23 and form negative pressure. Fig. 9 The cross-sectional shape of the end face where the rotor 2 contacts the annular blade 1 4 is conical. The cross-sectional shape of the end face where the motor shaft 3 contacts the annular blade 2 5 is conical. The conical design can make the annular blade 1 4 and the annular blade 2 5 produce a better airflow effect when rotating. Due to the gradual change of the conical surface, the air can be pushed and accelerated more smoothly when flowing through the blades, reducing the turbulence and eddy current phenomenon of the airflow, thereby improving efficiency and performance, and at the same time reducing the noise and vibration generated by the fan during operation.

[0032] Working principle: When using this motor, connect one end of the motor shaft 3 with the annular fan blade 25 to the device to be driven, and align the buckle 31 on the motor shaft 3 with the bayonet 22 on the rotor 2, and fully insert the motor shaft 3 into the rotor 2. At this time, the bayonet 22 is fully inserted into the limiting groove 21, and the bayonet 22 of the motor shaft 3 is limited in the circumferential direction of the limiting groove 21, and the inner end face of the motor shaft 3 is in contact with the elastic sealing ring 6 in the rotor 2; then start the power supply, the stator 1 causes the rotor 2 to rotate, and since the motor shaft 3 and the rotor 2 have been limited in the circumferential direction, the motor shaft 3 will follow the rotor 2 Rotation, during the rotation of the motor shaft 3, due to the influence of the centrifugal clamping plate 32 by the centrifugal force, it will slide in the radial direction of the motor shaft 3, when the centrifugal clamping plate 32 slides out of the buckle 31 structure, the centrifugal clamping plate 32 will be constrained by the axial direction of the bayonet 22 structure, so that the motor shaft 3 is axially limited, wherein, the higher the speed of the motor shaft 3, the greater the centrifugal force the centrifugal clamping plate 32 is subjected to, and the longer the sliding length is, when the centrifugal clamping plate 32 is fully inserted into the limiting groove 21, the constraint force of the bayonet 22 structure on the motor shaft 3 at this time reaches the maximum, so that the motor shaft 3 can efficiently transmit torque and bear load. When the motor shaft 3 stops completely, the centrifugal clamping plate 32 will be pulled into the buckle 31 structure by the elastic component 33, and the motor shaft 3 can be disassembled and assembled without being subjected to the axial constraint force generated by the centrifugal clamping plate 32.

[0033] At the same time, because the telescopic length of the centrifugal clamping plate 32 is affected by the centrifugal force generated by the rotation of the motor shaft 3, the centrifugal clamping plate 32 is affected by different centrifugal forces by adjusting the stiffness coefficient of the elastic component 33, and the speed of the motor shaft 3 can be intuitively observed through the telescopic amount of the centrifugal clamping plate 32. Since the surface of the centrifugal clamping plate 32 is coated with a high-contrast color material, and the bayonet 22 is made of transparent material, therefore, during the rotation of the motor shaft 3, the material color of the centrifugal clamping plate 32 will pass through the bayonet 22, and since the centrifugal clamping plate 32 rotates with the motor shaft 3 and the rotor 2, this color appearance will form a dynamic ring effect. By observing the diameter of this ring, the speed of the motor shaft 3 at this time can be intuitively estimated. This structure provides a simple and effective speed measurement method without the need for additional speed measurement tools.

[0034] During the operation of the motor, the wind direction generated by the annular blade 1 4 is to the left, and the gas in the negative pressure hole 23 will be extracted to form a negative pressure in the negative pressure hole 23 and the negative pressure groove 24. This negative pressure will produce an inward pulling force, so that the gap between the motor shaft 3 and the rotor 2 is compressed, that is, the gap is reduced, so that an additional axial pressing force is generated between the motor shaft 3 and the rotor 2. This structure will increase the contact tightness between the motor shaft 3 and the rotor 2, and improve the stability of rotation. And the higher the speed of the rotor 2, the greater the negative pressure generated. The greater negative pressure can produce a stronger inward pulling force, which can further reduce the gap between the motor shaft 3 and the rotor 2, thereby reducing the shaking of the motor shaft 3 during high-speed rotation. Ensure the operating efficiency and stability of the motor. And the wind direction generated by the annular blade 2 5 is to the right, which will increase the pressure in the annular groove 35, thereby pushing the centrifugal clamping plate 32, so that the centrifugal clamping plate 32 can also be inserted into the limit groove 21 at a low speed, reducing the speed required for the centrifugal clamping plate 32 to insert the limit groove 21. Lowering the speed required for the centrifugal clamping plate 32 to be inserted into the limiting groove 21 enables the motor to achieve stable axial limiting at a lower speed, which can broaden the application range of the motor, especially in situations where low-speed stable operation or frequent start and stop are required.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A motor shaft quick-release motor, comprising a stator (1), a rotor (2) coaxially rotatably mounted in the stator (1), a winding being arranged in the stator (1), and a permanent magnet being arranged on the rotor (2), characterized in that: The rotor (2) is also provided with an axial hole penetrating the rotor (2), the inner wall of the axial hole is provided with two or more groups of limiting grooves (21) in the circumferential direction, the limiting grooves (21) are provided with snap-ons (22) at both ends, the depth of the snap-ons (22) is less than the depth of the limiting grooves (21), a motor shaft (3) is coaxially arranged in the axial hole, a snap-on (31) with a protrusion matching the snap-on (22) is provided in the circumferential direction of the motor shaft (3), a centrifugal clamping plate (32) is slidably mounted in the snap-on (31), the telescopic distance and width of the centrifugal clamping plate (32) respectively matching the depth and width of the limiting groove (21), the bottom of the centrifugal clamping plate (32) is connected to the motor shaft (3) via an elastic component (33); when the motor shaft (3) rotates, the centrifugal clamping plate (32) slides toward the limiting groove (21) under the influence of centrifugal force; The surface of the rotor (2) is also fixedly mounted with an annular fan blade (4). The surface of the rotor (2) is provided with a negative pressure hole (23) penetrating the axial surface thereof. A plurality of the negative pressure holes (23) are provided along the circumferential direction of the rotor (2). The negative pressure holes (23) are connected to a negative pressure groove (24). An elastic sealing ring (6) is provided axially between the motor shaft (3) and the rotor (2). The elastic sealing ring (6) forms a gap between the inner end surface of the rotor (2) and the inner end surface of the motor shaft (3). The gap is connected to the negative pressure groove (24). When the rotor (2) rotates, the annular fan blade (4) generates a negative pressure in the negative pressure groove (24). The negative pressure between the motor shaft (3) and the rotor (2) presses the elastic sealing ring (6) tightly.

2. The motor shaft quick-release motor according to claim 1, characterized in that: The clamping port (22) is made of a transparent material, and the surface of the centrifugal clamping plate (32) is coated with a high-contrast color material.

3. The motor shaft quick-release motor according to claim 1, characterized in that: The end surface of the motor shaft (3) is also provided with an annular fan blade 2 (5). The surface of the motor shaft (3) is also provided with a plurality of boost holes (34). The boost holes (34) are provided with a plurality of annular grooves (35) equidistantly spaced inside the boost holes (34) and connected to the sliding position of the centrifugal clamping plate (32). When the motor shaft (3) rotates, the annular fan blade 2 (5) forms a positive pressure inside the boost holes (34) and the annular grooves (35), and the centrifugal clamping plate (32) is pushed by the pressure to move toward the inside of the limit groove (21).

4. The motor shaft quick-release motor according to claim 1, characterized in that: A housing (7) is fixedly provided on the stator (1), the housing (7) is rotatably connected to the rotor (2), the front and rear end surfaces of the housing (7) are connected to the rotor (2) by bearings, and the rear end of the housing (7) is rotatably connected to the motor shaft (3).

5. The motor shaft quick-release motor according to claim 4, characterized in that: A sealing cover (71) is provided on the rear end surface of the housing (7), and the sealing cover (71) is rotatably connected to the motor shaft (3).

6. The motor shaft quick-release motor according to claim 1, characterized in that: The diameter of the negative pressure groove (24) is greater than the diameter of the motor shaft (3), and the diameter of the elastic sealing ring (6) is greater than the diameter of the motor shaft (3).

7. The motor shaft quick-release motor according to claim 1, characterized in that: The cross-sectional shape of the end surface of the rotor (2) in contact with the annular fan blade 1 (4) is conical.

8. The motor shaft quick-release motor according to claim 3, characterized in that: The cross-sectional shape of the end surface where the motor shaft (3) contacts the annular fan blade 2 (5) is conical.

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