Electric spindle core, electric spindle and motor

Abstract

The invention relates to the technical field of motors, and discloses an electric spindle core, an electric spindle and a motor. A plurality of heat exchange holes are formed in the heat exchange part and are uniformly distributed along the axis of the heat exchange part, and the sections of the heat exchange holes are polygonal; the heat exchanger further comprises a connecting part used for being connected with an air inlet assembly, the connecting part and the heat exchange part are sequentially arranged in the first direction, a recovery cavity is formed between the connecting part and the heat exchange part, the multiple heat exchange holes communicate with the recovery cavity, and a connecting hole is formed in the other end of the connecting part. The air inlet assembly comprises an air inlet pipe, and the air inlet pipe sequentially penetrates through the connecting hole and the recovery cavity to be communicated with the heat exchange hole. According to the motorized spindle core, the motorized spindle and the motor, the contact area between gas and the spindle core is increased, the gas is more uniformly dispersed in the spindle core, heat transfer between the gas and the spindle core is enhanced, the cooling uniformity is improved, and the heat exchange efficiency is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to an electric spindle shaft core, an electric spindle and a motor. Background Art

[0002] The electric spindle is the motor spindle, which is the transmission source of the motor. The motor spindle is connected to the motor rotor to convert the electromagnetic energy generated by the motor into mechanical energy and transmit it to the load. In high-precision and high-speed applications, the motor spindle is usually equipped with a cooling system to prevent overheating caused by the heat generated by high-speed rotation (the electric spindle is connected to the bearing, and the bearing maintains the stability of rotation, but due to high-speed rotation, the friction between the bearing and the electric spindle will generate a lot of heat). The cooling system introduces cooling gas into the spindle core through the heat exchange holes and airflow path design, takes away the heat and then discharges it; At present, when cooling the motor spindle, a cooling channel is opened in the shaft core of the electric spindle, and cooling of the motor spindle is assisted by passing cooling gas. The existing cooling channel is usually designed to be linear, that is, the cooling gas is passed in a straight line and then discharged, resulting in a limited contact area between the cooling gas and the shaft core, low heat exchange efficiency, and failure to fully remove the heat generated inside the shaft core. In addition, due to the single flow path of the cooling gas, the cooling gas cannot be evenly distributed during the flow process, resulting in uneven temperature distribution inside the shaft core, serious local overheating, and affecting the service life of the motor spindle. Summary of the invention

[0003] The purpose of the present invention is to provide an electric spindle core, an electric spindle and a motor, which increase the contact area between the gas and the core, and make the gas more evenly dispersed in the core, thereby enhancing the heat transfer between the gas and the core, improving the uniformity of cooling, and effectively improving the heat exchange efficiency.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: Design an electric spindle shaft core, including a heat exchange part; A plurality of heat exchange holes are provided in the heat exchange part, and the plurality of heat exchange holes are evenly distributed along the axis of the heat exchange part, and the cross section of the heat exchange holes is arranged in a polygonal shape; It also includes a connecting portion for connecting the air intake assembly, the connecting portion and the heat exchange portion are sequentially arranged along the first direction, a recovery cavity is formed between the connecting portion and the heat exchange portion, a plurality of the heat exchange holes are communicated with the recovery cavity, and a connecting hole is opened at the other end of the connecting portion; The air intake assembly comprises an air intake pipe, which passes through the connecting hole and the recovery chamber in sequence and is communicated with the heat exchange hole.

[0005] Optionally, it also includes a driving part for connecting to a driven component, the heat exchange part and the driving part are arranged in sequence along a first direction, a dispersion cavity is opened at the end of the driving part toward the heat exchange part, and the ends of several heat exchange holes away from the recovery cavity are connected to the dispersion cavity, and the outlet end of the air inlet pipe passes through the heat exchange hole and is located in the dispersion cavity.

[0006] Optionally, the driving portion includes a driving shaft core, the dispersion chamber is opened in the driving shaft core, a dispersion block is fixedly connected to the bottom of the dispersion chamber along the first direction, and the dispersion block is arranged in a conical shape.

[0007] Optionally, the air intake assembly also includes an air intake hood, which is fixedly connected to one end of the air intake pipe and located in the dispersion chamber, the air outlet end of the air intake hood corresponds to the dispersion block along a first direction, the other end of the air intake pipe is connected to the air source, and the outer surface of the air intake pipe is rotatably connected to the air outlet assembly.

[0008] Optionally, the air outlet component includes a recovery sleeve, one end of the recovery sleeve is arranged on the outer surface of the intake pipe through a hole, the other end of the recovery sleeve is fixedly connected to the inner wall of the connecting hole, and is spaced apart from the intake pipe, a plurality of blades are circumferentially arranged on the outer surface of the intake pipe located inside the recovery sleeve, and an exhaust hole is opened on the outer surface of the recovery sleeve.

[0009] Optionally, a splicing flange is fixedly connected to the outer surface of the driving shaft core, and the driving shaft core is detachably connected to the driven component via the splicing flange.

[0010] Optionally, the connecting portion includes a connecting shaft core portion for fixedly connecting to the rotor, the recovery chamber and the connecting hole are both arranged in the connecting shaft core portion, the inner wall of the recovery chamber is inclined along a first direction to the center line of the connecting shaft core portion, the diameter of one end of the recovery chamber is smaller than the diameter of the other end, the end of the recovery chamber with a larger diameter is connected to a plurality of heat exchange holes, and the end of the recovery chamber with a smaller diameter is connected to the connecting hole.

[0011] Optionally, the heat exchange part includes a heat exchange shaft core part for connecting to the bearing, a plurality of heat exchange holes are opened in the heat exchange shaft core part, the cross-section of the heat exchange holes is hexagonal, the angle between adjacent sides is one hundred and twenty degrees, and the outer surface of the heat exchange shaft core part is coated with a wear-resistant ceramic layer corresponding to the bearing.

[0012] An electric spindle comprises the electric spindle shaft core as described above.

[0013] A motor comprises the electric spindle as described above.

[0014] The present invention provides an electric spindle shaft core, an electric spindle and a motor, which have the following beneficial effects: The electric spindle shaft core, the electric spindle and the motor transport the heat dissipation gas to the several heat exchange holes of the heat exchange part through the air intake pipe after passing through the connecting hole and the recovery chamber. With the uniform distribution of the heat exchange holes, the heat dissipation gas can be evenly and effectively dispersed to the interior of the several heat exchange holes under the action of centrifugal force. When flowing through the heat exchange holes, the heat dissipation gas absorbs the heat of the heat exchange part, takes away the heat energy and reduces the temperature of the shaft core. After completing the heat exchange process in the heat exchange holes, the heat dissipation gas is re-collected through the recovery chamber and discharged from the recovery chamber. The polygonal heat exchange holes not only increase the contact area between the gas and the heat exchange part, but also cooperate with the rotation of the heat exchange part during use to disturb the airflow through the action of centrifugal force, so that the gas is more evenly dispersed in the heat exchange part, thereby enhancing the heat transfer between the gas and the shaft core, improving the uniformity of cooling, and effectively improving the heat exchange efficiency. In addition, the weight of the overall structure of the heat exchange part is reduced through the polygonal structural design, and the dynamic performance and stability of the rotation are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the installation structure of the electric spindle shaft core in the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the electric spindle shaft core in the present invention; Figure 3 It is a schematic cross-sectional structure diagram of the electric spindle shaft core in the present invention; Figure 4 It is a schematic diagram of the cross-sectional structure of the electric spindle shaft core in the present invention.

[0016] In the figure: 100, heat exchange part; 110, heat exchange hole; 120, heat exchange shaft core; 130, wear-resistant ceramic layer; 200, air intake assembly; 210, air intake pipe; 220, air intake cover; 230, blades; 300, connecting part; 310, recovery chamber; 320, connecting shaft core; 330, connecting hole; 400, driving part; 410, dispersion chamber; 420, driving shaft core; 430, dispersion block; 440, splicing flange; 500, air outlet assembly; 510, recovery sleeve; 520, exhaust hole. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. All other embodiments obtained by ordinary technicians in the field without making creative work based on the embodiments of the present invention shall fall within the scope of protection of the present invention.

[0018] An embodiment of the present invention provides a motor spindle core, which is used in a driving scenario. In this embodiment, the structure of the motor spindle core is improved to have the advantage of uniform heat dissipation. The motor spindle core is also an electric spindle core.

[0019] See also Figures 1 to 4 , the present invention provides a technical solution: an electric spindle core, including a heat exchange part 100; A plurality of heat exchange holes 110 are provided in the heat exchange part 100. The plurality of heat exchange holes 110 are evenly distributed along the axis of the heat exchange part 100. The cross section of the heat exchange holes 110 is arranged in a polygonal shape. The heat exchanger 100 is provided with a connection portion 300 for connecting to the air intake assembly 200. The connection portion 300 and the heat exchange portion 100 are sequentially arranged along the first direction, and a recovery chamber 310 is formed between the connection portion 300 and the heat exchange portion 100. The heat exchange holes 110 are all connected to the recovery chamber 310. A connection hole 330 is provided at the other end of the connection portion 300. The air intake assembly 200 includes an air intake pipe 210, which passes through the connecting hole 330 and the recovery chamber 310 in sequence and communicates with the heat exchange hole 110; The heat exchange holes 110 are evenly distributed along the axis of the heat exchange part 100, which increases the surface area in contact with the gas, thereby improving the heat exchange efficiency. The cross-section of the heat exchange hole 110 is set in a polygonal shape, which can play a turbulent effect and improve the heat exchange efficiency when the gas flows through. The polygonal cross-section reduces the weight of the overall structure of the heat exchange part 100. The reduced weight can have higher acceleration and deceleration performance, improve the dynamic performance and stability of the rotation (that is, high strength and rigidity, especially in the middle section of the shaft core, which can effectively improve the bending and twisting resistance of the shaft core). The recovery chamber 310 formed between the connecting part 300 and the heat exchange part 100 plays a role in gas collection, and the connecting hole 330 provides an installation position for the intake pipe 210. The air intake pipe 210 is arranged to ensure that it can be stably connected to the shaft core. The air intake pipe 210 allows the airflow to smoothly pass through the connecting hole 330 and the recovery chamber 310 and directly enter the heat exchange hole 110 for heat exchange. After the heat exchange is completed, the gas first enters the heat exchange hole 110 due to the continuous airflow, then fills the heat exchange hole 110, and then gathers in the recovery chamber 310, and then is discharged through the connecting hole 330. Through the action of the recovery chamber 310, the positive pressure effect is adopted, that is, the gas in the recovery chamber 310 accumulates more and more, so that the gas in the recovery chamber 310 is squeezed out through the connecting hole 330, so that the gas can fully stay in the heat exchange hole 110 before being discharged, thereby reducing the generation of the boundary layer and reducing the heat dissipation efficiency.

[0020] In this embodiment, as a preferred solution, it also includes a driving part 400 for connecting to the driven component. The heat exchange part 100 and the driving part 400 are arranged in sequence along the first direction. The driving part 400 is provided with a dispersion chamber 410 at the end facing the heat exchange part 100. The ends of the plurality of heat exchange holes 110 away from the recovery chamber 310 are all connected to the dispersion chamber 410. The outlet end of the air inlet pipe 210 passes through the heat exchange hole 110 and is located in the dispersion chamber 410. The driving part 400 is used to connect to the driven component to ensure that the electric spindle shaft core can be reliably connected to the driven component. The driving part 400 assumes the functions of mechanical connection and power transmission, and also realizes uniform distribution of cooling gas through the dispersion chamber 410 inside it, so as to disperse the cooling gas. The setting of the cavity 410 ensures that the cooling gas can be evenly dispersed before entering the heat exchange hole 110, avoiding the phenomenon of excessive local flow, and improving the overall heat exchange efficiency. The end of the heat exchange hole 110 away from the recovery chamber 310 is connected to the dispersion cavity 410. The evenly distributed heat exchange holes 110 obtain cooling gas through the dispersion cavity 410, so that the gas can flow evenly through each heat exchange hole 110, ensuring uniform temperature distribution in the heat exchange part 100, preventing local overheating. The outlet end of the air inlet pipe 210 is located in the dispersion cavity 410, and the centrifugal force and cavity structure are used to make the cooling gas more evenly dispersed in the heat exchange hole 110, preventing excessive or too small local flow, and improving the heat exchange effect. Through the mutual cooperation of the air inlet pipe 210, the dispersion chamber 410, the heat exchange hole 110 and the recovery chamber 310, efficient cooling and stable airflow distribution are achieved. The outlet end of the air inlet pipe 210 is located in the dispersion chamber 410. The centrifugal force and the cavity structure are used to evenly disperse the cooling gas into the heat exchange hole 110 to prevent the local flow from being too large or too small, thereby improving the overall heat exchange effect. The polygonal cross-section of the heat exchange hole 110 increases the contact area and turbulence effect between the gas and the shaft core, further enhancing the heat exchange efficiency. The setting of the recovery chamber 310 ensures the effective recovery and recycling of the cooling gas and provides a stable airflow path.

[0021] In this embodiment, as a preferred solution, the air intake assembly 200 also includes an air intake hood 220, which is fixedly connected to one end of the air intake pipe 210 and is located in the dispersion chamber 410, and the air outlet end of the air intake hood 220 corresponds to the dispersion block 430 along the first direction, and the other end of the air intake pipe 210 is connected to the air source, and the outer surface of the air intake pipe 210 is rotatably connected to the air outlet assembly 500, and the air outlet end of the air intake hood 220 corresponds to the dispersion block 430 along the first direction, and the air intake hood 220 cooperates with the dispersion block 430 to The cooling gas delivered by the air pipe 210 is evenly distributed in the dispersion chamber 410, that is, the gas output through the air intake hood 220 contacts the dispersion block 430, or in other words, the dispersion block 430 is impacted, and the heat dissipation gas delivered by the air intake pipe 210 is evenly distributed in the dispersion chamber 410 through the dispersion block 430, that is, the heat dissipation gas flows in all directions, thereby improving the uniform distribution effect of the heat dissipation gas, ensuring the consistency of the airflow in each heat exchange hole 110 as much as possible, avoiding excessive or small local flow, and improving the overall heat exchange efficiency.

[0022] In this embodiment, as a preferred solution, the gas outlet assembly 500 includes a recovery sleeve 510, one end of the recovery sleeve 510 is sleeved on the outer surface of the intake pipe 210 through a hole, the other end of the recovery sleeve 510 is fixedly connected to the inner wall of the connecting hole 330, and is spaced apart from the intake pipe 210, a plurality of blades 230 are circumferentially arranged on the outer surface of the intake pipe 210 located in the recovery sleeve 510, and an exhaust hole 520 is opened on the outer surface of the recovery sleeve 510; Through the action of the recovery sleeve 510, the gas enters the dispersion chamber 410 through the air inlet cover 220, and then enters the recovery chamber 310 through the heat exchange hole 110. The recovery sleeve 510 is located at one end of the recovery chamber 310 and is spaced apart from the air inlet pipe 210. The gas entering the recovery chamber 310 then enters the recovery sleeve 510 and is discharged through the exhaust hole 520 provided on the recovery sleeve 510. The blades 230 provided through the air inlet pipe 210 are in a relatively rotating relationship with the recovery sleeve 510. When the recovery sleeve 510 rotates, the inner wall of the recovery sleeve 510 cooperates with the blades 230 to generate negative pressure, which can extract the gas in the recovery chamber 310 and then discharge it through the exhaust hole 520, thereby increasing the speed of gas discharge from the recovery chamber 310, and further improving the heat dissipation efficiency. Through the connection between the recovery sleeve 510 and the connecting hole 330, the recovery sleeve 510 can rotate with the connecting portion 300; One end of the blade 230 is fixedly connected to the air inlet pipe 210, and the other end of the blade 230 is inclined along the rotation direction or in the opposite direction of the rotation direction. Therefore, when the rotating sleeve 510 and the blade 230 rotate relative to each other, negative pressure can be generated. This is a well-known technology and is only cited here.

[0023] In this embodiment, as a preferred solution, the outer surface of the driving shaft core 420 is fixedly connected with a splicing flange 440, and the driving shaft core 420 is detachably connected to the driven component through the splicing flange 440; The driving shaft core 420 is detachably connected to the driven component through the splicing flange 440. The splicing flange 440 provides a stable connection interface, so that the driving shaft core 420 can be reliably connected to the driven component. The detachable design makes the driven component easy to install and disassemble, and convenient for maintenance and replacement. The design of the splicing flange 440 ensures the stability and strength of the connection, simplifies the installation and maintenance process, improves the maintainability and flexibility of the system, and ensures that the electric spindle shaft core can stably transmit power. The dispersion cavity 410 opened on the driving shaft core 420 is used to disperse The driven component receives power from the driving shaft core 420 through the splicing flange 440 and transmits it to other mechanical components. The driven component cooperates with the design of the splicing flange 440 to ensure the reliability and efficiency of power transmission and reduce the wear and power loss between mechanical components. Through the connection of the splicing flange 440, the driving shaft core 420 and the driven component can be quickly disassembled and replaced, which improves the flexibility of use. The driven component or the driving shaft core 420 can be quickly replaced according to actual needs to adapt to different working environments and processing requirements.

[0024] In this embodiment, as a preferred solution, the connecting portion 300 includes a connecting shaft core portion 320 for fixedly connecting to the rotor, the recovery chamber 310 and the connecting hole 330 are both arranged in the connecting shaft core portion 320, the inner wall of the recovery chamber 310 is inclined along the first direction with the center line of the connecting shaft core portion 320, the diameter of one end of the recovery chamber 310 is smaller than the diameter of the other end, the end of the recovery chamber 310 with a larger diameter is connected to the plurality of heat exchange holes 110, and the end of the recovery chamber 310 with a smaller diameter is connected to the connecting hole 330; The connecting shaft core 320 provides a channel for mechanical connection and power transmission, so that the electric spindle shaft core can stably receive the power of the driving motor (connected to the rotor, and the rotor rotates through the electromagnetic cooperation between the rotor and the stator, which is a known technology. The power is transmitted to the connecting shaft core 320 through the rotor, so that the electric spindle shaft core rotates). A recovery chamber 310 and a connecting hole 330 are set in the connecting shaft core 320 to form a flow path for the cooling gas to be discharged. The end with a small diameter of the recovery chamber 310 is connected to the connecting hole 330, and the end with a large diameter is connected to several heat exchange The hole 110 is connected, and the inclined design of the inner wall enables the airflow to be gradually accelerated in the recovery chamber 310. The inclination and diameter change are conducive to the gradual convergence and guidance of the cooling gas, ensuring the smooth transition of the airflow, improving the flow efficiency of the cooling gas, reducing the airflow resistance and turbulence, optimizing the recovery and recycling process of the cooling gas, and improving the overall heat exchange efficiency. The gas entering the recovery chamber 310 is discharged through the connecting hole 330. Through the optimized airflow path and stable power transmission, the electric spindle can maintain good dynamic response performance during operation.

[0025] The air source may be a blower or an air pump, both of which are known technologies and are only cited here for the purpose of generating air flow through the air inlet pipe.

[0026] In this embodiment, as a preferred solution, the heat exchange part 100 includes a heat exchange shaft core 120 for connecting with a bearing, a plurality of heat exchange holes 110 are provided in the heat exchange shaft core 120, the cross section of the heat exchange holes 110 is hexagonal, the angle between adjacent sides is 120 degrees, and the outer surface of the heat exchange shaft core 120 is coated with a wear-resistant ceramic layer 130 corresponding to the bearing; The heat exchange shaft core 120 is used to connect with the bearing, and through the connection with the bearing, it provides rotational support to ensure the stable operation of the electric spindle shaft core. The hexagonal heat exchange hole 110 design increases the heat exchange area, enhances the flow effect of the cooling gas, and improves the heat exchange efficiency of the cooling gas, ensuring that the shaft core can effectively dissipate heat under high temperature working conditions, and increases the strength and rigidity of the structure. The hexagonal heat exchange hole 110 can provide a larger surface area, increase the contact area between the gas and the shaft core, and help to evenly distribute the airflow, reduce the resistance and turbulence of the airflow, enhance the heat exchange efficiency, enable the cooling gas to more effectively take away the heat inside the shaft core, and also improve the strength and rigidity of the structure. It can better withstand mechanical stress, reduce deformation, and improve the stability and durability of the electric spindle shaft core. The coating of the wear-resistant ceramic layer 130 reduces the friction and wear between the electric spindle shaft core and the bearing. The wear resistance and high temperature resistance of the ceramic layer improve the durability of the electric spindle shaft core and extend the service life of the electric spindle shaft core.

[0027] When the present embodiment is in use, the cooling gas enters the dispersion chamber 410 through the air intake pipe 210 of the air intake assembly 200, and the air intake cover 220 and the dispersion block 430 cooperate to evenly distribute the gas into the heat exchange hole 110 (i.e., the gas impacts the dispersion block 430 after being discharged through the air intake cover 220), thereby ensuring even distribution of the cooling gas, preventing excessive or insufficient local flow, ensuring even temperature distribution in the heat exchange portion 100, and preventing local overheating. When the cooling gas passes through the heat exchange hole 110, it absorbs the heat of the shaft core. The polygonal cross-section design of the heat exchange hole 110 increases the contact area between the gas and the shaft core, forming a turbulent effect and improving the heat exchange efficiency. The gas after heat exchange is gathered in the recovery chamber 310, and the gas after heat exchange enters the recovery chamber 310. The gas gradually accumulates in the collecting cavity 310 and is discharged through the connecting hole 330. The recovery sleeve 510 and the blades 230 of the air inlet pipe 210 rotate relative to each other to generate negative pressure, which accelerates the gas discharge. The polygonal cross-section reduces the weight of the overall structure of the heat exchange part 100, improves the acceleration and deceleration performance of the main shaft, and enhances the dynamic performance and stability of the rotation. The outer surface of the heat exchange shaft core 120 is coated with a wear-resistant ceramic layer 130, which reduces the friction and wear between the bearings, improves the durability of the shaft core, and extends the service life. The inclined design and diameter change of the inner wall of the recovery cavity 310 ensure a smooth transition of the airflow and improve the flow efficiency of the cooling gas. Due to the reduced weight, it can also reduce energy loss and play a role in energy saving.

[0028] The present invention also provides an electric spindle, comprising the electric spindle shaft core as described above, and may further comprise a sealing member for protecting the bearing.

[0029] The present invention also provides a motor, including an electric spindle as described above, which is an existing well-known technology and is only cited here, including a rotor, a stator and an electric spindle. The rotor is fixedly connected to the outer surface of the electric spindle, and generates a rotational force by cooperating with the stator through electromagnetic effect. The rotor is fixedly connected to the outer surface of the electric spindle to drive the electric spindle to rotate to achieve power transmission.

[0030] 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. An electric spindle shaft core, characterized in that: comprising a heat exchange portion (100); A plurality of heat exchange holes (110) are provided in the heat exchange portion (100), the plurality of heat exchange holes (110) are evenly distributed along the axis of the heat exchange portion (100), and the cross-section of the heat exchange holes (110) is arranged in a polygonal shape; It also comprises a connecting portion (300) for connecting to the air intake assembly (200), the connecting portion (300) and the heat exchange portion (100) being arranged in sequence along a first direction, a recovery chamber (310) being formed between the connecting portion (300) and the heat exchange portion (100), a plurality of the heat exchange holes (110) being in communication with the recovery chamber (310), and a connecting hole (330) being provided at the other end of the connecting portion (300); The air intake assembly (200) comprises an air intake pipe (210), and the air intake pipe (210) passes through the connection hole (330) and the recovery chamber (310) in sequence to communicate with the heat exchange hole (110).

2. The electric spindle core according to claim 1, characterized in that: The invention also comprises a driving part (400) for connecting to a driven component, wherein the heat exchange part (100) and the driving part (400) are arranged in sequence along a first direction, and a dispersion chamber (410) is provided at the end of the driving part (400) facing the heat exchange part (100), and ends of a plurality of the heat exchange holes (110) away from the recovery chamber (310) are all connected to the dispersion chamber (410), and an outlet end of the air inlet pipe (210) passes through the heat exchange hole (110) and is located in the dispersion chamber (410).

3. The electric spindle shaft core according to claim 2, characterized in that: The driving part (400) comprises a driving shaft core (420), the dispersion chamber (410) is opened in the driving shaft core (420), and a dispersion block (430) is fixedly connected to the bottom of the dispersion chamber (410) along the first direction, and the dispersion block (430) is arranged in a conical shape.

4. The electric spindle shaft core according to claim 3, characterized in that: The air intake assembly (200) further comprises an air intake hood (220), the air intake hood (220) being fixedly connected to one end of the air intake pipe (210) and being located in the dispersion chamber (410), the air outlet end of the air intake hood (220) corresponding to the dispersion block (430) along a first direction, the other end of the air intake pipe (210) being connected to an air source, and the outer surface of the air intake pipe (210) being rotatably connected to the air outlet assembly (500).

5. The electric spindle shaft core according to claim 4, characterized in that: The air outlet assembly (500) comprises a recovery sleeve (510), one end of the recovery sleeve (510) being sleeved on the outer surface of the air intake pipe (210) through a hole, the other end of the recovery sleeve (510) being fixedly connected to the inner wall of the connection hole (330) and spaced apart from the air intake pipe (210), a plurality of blades (230) being circumferentially arranged on the outer surface of the air intake pipe (210) located inside the recovery sleeve (510), and an exhaust hole (520) being opened on the outer surface of the recovery sleeve (510).

6. The electric spindle shaft core according to claim 3, characterized in that: The outer surface of the driving shaft core (420) is fixedly connected with a splicing flange (440), and the driving shaft core (420) is detachably connected to the driven component via the splicing flange (440).

7. The electric spindle shaft core according to claim 1, characterized in that: The connecting portion (300) comprises a connecting shaft core portion (320) for fixedly connecting to the rotor, the recovery chamber (310) and the connecting hole (330) are both arranged in the connecting shaft core portion (320), the inner wall of the recovery chamber (310) is arranged obliquely along a first direction with respect to the center line of the connecting shaft core portion (320), the diameter of one end of the recovery chamber (310) is smaller than the diameter of the other end, the end of the recovery chamber (310) with a larger diameter is connected to a plurality of heat exchange holes (110), and the end of the recovery chamber (310) with a smaller diameter is connected to the connecting hole (330).

8. The electric spindle shaft core according to claim 1, characterized in that: The heat exchange part (100) comprises a heat exchange shaft core part (120) for connecting to a bearing, a plurality of heat exchange holes (110) are provided in the heat exchange shaft core part (120), the cross section of the heat exchange holes (110) is hexagonal, and the angle between adjacent sides is 120 degrees, and the outer surface of the heat exchange shaft core part (120) is coated with a wear-resistant ceramic layer (130) corresponding to the bearing.

9. An electric spindle, characterized in that: It comprises the electric spindle core as described in any one of claims 1-8.

10. A motor, characterized in that: Comprising the electric spindle as claimed in claim 9.

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