A lathe electric spindle

Abstract

The present invention relates to the technical field of lathe spindles, and specifically to an electric spindle of a lathe, comprising a power mechanism, wherein the power mechanism comprises a base, a motor is arranged on the base, the motor comprises a stator and a rotor, a spindle is fixedly connected to the rotor, the spindle passes through the motor, and a cooling mechanism is arranged at one end of the spindle, wherein the cooling mechanism comprises a cooling cavity opened at one end of the spindle, the cooling cavity is connected and provided with a liquid inlet groove and a liquid outlet groove, and the liquid inlet groove and the liquid outlet groove extend through the spindle; the beneficial effects of the present invention are: through the provision of the cooling cavity, coolant can be supplied into the interior of the spindle through the liquid inlet groove, so that the coolant cools the spindle from the inside, and the coolant can also cool the entire spindle during the process of flowing in the liquid inlet groove, and through the provision of the liquid outlet groove, the cooled coolant can be discharged from the spindle through the liquid outlet groove.

Description

Technical Field

[0001] The present invention relates to the technical field of lathe spindles, in particular to an electric spindle for a lathe. Background Art

[0002] As modern manufacturing continues to demand ever-increasing precision, efficiency, and automation, the electric spindle, a core component of CNC lathes, has seen widespread application and development. Integrating an electric motor with the machine tool spindle, the electric spindle directly drives the workpiece, eliminating intermediate links like belts and gears in traditional transmission systems. This enables higher speeds, improved dynamic response, and superior machining accuracy and surface quality.

[0003] An electric spindle is usually composed of the following main parts: Motor stator and rotor: This is the power source of the electric spindle. The stator winding generates a magnetic field through electric current, which drives the rotor to rotate, thereby driving the spindle to run at high speed. Bearing system: In order to ensure the stability and accuracy of the electric spindle when running at high speed, high-precision rolling bearings or specially designed bearing systems such as air static pressure bearings and liquid dynamic and static pressure bearings are usually used. Cooling device: Since the electric spindle generates a lot of heat during operation, an effective cooling device is required to ensure its temperature stability. Common forms include water cooling and oil cooling. Lubrication system: In order to reduce wear and increase service life, a special lubrication system is installed in the electric spindle to ensure good lubrication between all moving parts. Sensors and control systems: Modern electric spindles often have a variety of sensors built in (such as temperature and vibration sensors), and use advanced control systems to achieve real-time monitoring and adjustment of the spindle's operating status.

[0004] The existing cooling system has poor cooling effect during the high-speed rotation of the spindle, resulting in large thermal deformation of the spindle and reduced production accuracy.

[0005] Therefore, a lathe electric spindle is needed to solve the above problems. Summary of the Invention

[0006] In order to solve the above problem, that is, to solve the problem that the cooling effect is poor during the high-speed rotation of the spindle, which easily leads to a decrease in production accuracy, the present invention provides a lathe electric spindle.

[0007] A lathe electric spindle includes a power mechanism, which includes a base, a motor is provided on the base, the motor includes a stator and a rotor, a spindle is fixedly connected to the rotor, the spindle passes through the motor, a cooling mechanism is provided at one end of the spindle, the cooling mechanism includes a cooling cavity opened at one end of the spindle, a liquid inlet groove and a liquid outlet groove are connected to the cooling cavity, and the liquid inlet groove and the liquid outlet groove extend through the spindle.

[0008] Specifically, when the lathe is working, the motor is started, the rotor in the motor rotates, and the rotor drives the spindle to rotate. At the same time, coolant is supplied to the liquid inlet tank. The coolant cools the spindle while flowing in the liquid inlet tank. Then the coolant flows into the cooling cavity, and then the coolant flows out of the spindle through the liquid outlet tank. The coolant cools the spindle while flowing in the liquid outlet tank.

[0009] Furthermore, the motor is prior art and will not be described in detail.

[0010] Preferably, the cooling mechanism further includes an air-cooling part, which includes a driving gear fixedly connected to the end of the main shaft away from the cooling chamber, and the air-cooling part further includes six driven gears evenly arranged along the circumferential direction, the driven gears are meshed with the driving gear, and the driven gears are fixedly sleeved on the rotating shaft, and the rotating shaft is fixedly sleeved with an impeller.

[0011] Specifically, during use, when the main shaft rotates, the main shaft drives the driving gear to rotate, the driving gear drives the driven gear to rotate, the driven gear drives the rotating shaft to rotate, and the rotating shaft drives the impeller to rotate.

[0012] Preferably, the rotating shaft is connected to the motor through a mounting piece, and the mounting piece includes a mounting box fixedly connected to the motor, the main shaft extends into the mounting box, the mounting box is gap-mounted on the main shaft, the driving gear is located in the mounting box, the rotating shaft is rotatably connected to the inner wall of the mounting box, and a plurality of air holes are provided on a side wall of the mounting box close to the motor and a side wall away from the motor.

[0013] Specifically, during use, when the rotating shaft rotates, the rotating shaft drives the impeller to rotate, and the impeller drives the air in the installation box to flow, so that external air enters the installation box from the air hole close to the motor, and then the air is discharged from the installation box from the air hole away from the motor.

[0014] By providing the mounting box, the rotating shaft can be mounted on the inner wall of the mounting box, thereby enabling the air-cooling component to be mounted.

[0015] Preferably, the mounting box is provided with a liquid supply part, and the liquid supply part includes a through hole opened on a side wall of the mounting box away from the motor, a connecting plate is rotatably connected in the through hole, the connecting plate is coaxial with the main shaft, a transfer box is rotatably provided on the connecting plate, and the transfer box is fixedly connected to the mounting box through a fixing rod, a liquid supply pipe is provided in communication with the transfer box, and a liquid inlet pipe is provided in communication with the connecting plate, one end of the liquid inlet pipe is connected to the transfer box, and the other end of the liquid inlet pipe is connected to the liquid inlet tank.

[0016] Specifically, when in use, the liquid supply pipe is connected to the external liquid supply device, and the external liquid supply device supplies the coolant into the transfer box through the liquid supply pipe. Then the coolant enters the liquid inlet tank through the liquid inlet pipe to cool the main shaft; during the rotation of the main shaft, the main shaft drives the liquid inlet pipe to rotate, and the liquid inlet pipe drives the connecting plate to rotate.

[0017] Preferably, the liquid supply component further comprises a nozzle fixedly connected to the liquid outlet groove, the nozzle is bent, and the nozzle opening of the nozzle faces the edge of the driving gear.

[0018] Specifically, during use, when the coolant is discharged from the liquid outlet groove, the coolant is sprayed out through the nozzle so that the coolant is sprayed on the edge of the driving gear.

[0019] Preferably, a collecting member is provided in communication with the lower side of the installation box, and the collecting member includes a collecting box provided in communication with the lower end of the installation box, and a first filter plate is provided in the collecting box.

[0020] Specifically, when in use, after the coolant is sprayed out from the nozzle, the coolant flows into the collection box through the first filter plate, and the first filter plate filters the coolant.

[0021] Preferably, the collecting member also includes a return pipe connected to the bottom end of the collecting box, the return pipe is connected to the transfer box, the first filter plate is slidably connected to the collecting box, a first spring is connected between the first filter plate and the bottom wall of the collecting box, a second filter plate is provided on the upper side of the first filter plate, the second filter plate is slidably connected to the collecting box, the meshes on the first filter plate and the second filter plate are staggered, and a solenoid valve is provided in the return pipe.

[0022] Specifically, during use, when the coolant in the collection box cools down, the second filter plate moves downward. When the second filter plate contacts the first filter plate, the mesh holes on the second filter plate are misaligned with the mesh holes on the first filter plate, so that the first filter plate and the second filter plate are closed, and the coolant in the collection box is forced into the return pipe, and then the coolant enters the transfer box through the return pipe.

[0023] Furthermore, the solenoid valve is a prior art and will not be described in detail.

[0024] Preferably, the collecting piece also includes a cam frame fixedly sleeved on the main shaft, the cam frame is located in the mounting box, a fixed sleeve is fixedly connected to the inner wall of the mounting box, an abutment rod is slidably connected in the fixed sleeve, the upper end of the abutment rod can contact the cam frame, the bottom end of the abutment rod is fixedly connected to the second filter plate, and a second spring is connected between the second filter plate and the fixed sleeve.

[0025] Specifically, during use, when the main shaft rotates, the main shaft drives the cam frame to rotate, and the cam frame abuts against the abutment rod during rotation, causing the abutment rod to move downward, and the abutment rod drives the second filter plate to move downward, and the second filter plate stretches the second spring, so that the second filter plate cooperates with the first filter plate to press out the cooling liquid; when the cam frame is out of contact with the abutment rod, the second filter plate and the abutment rod are reset under the action of the second spring.

[0026] By setting the cam frame, when the main shaft rotates, the second filter plate can be driven to move up and down through the cam frame, so that the coolant can be intermittently refluxed for cooling.

[0027] Furthermore, a cooling device is provided on the bottom wall of the collection box. The cooling device is prior art and will not be described in detail.

[0028] When in use, the cooling device cools the coolant in the collection tank.

[0029] The beneficial effects of the present invention are:

[0030] 1. Through the setting of the cooling chamber, the coolant can be supplied into the spindle through the liquid inlet tank, so that the coolant cools the spindle from the inside, and the coolant can also cool the entire spindle during the flow in the liquid inlet tank. Through the setting of the liquid outlet tank, the cooled coolant can be discharged from the spindle through the liquid outlet tank, and during the discharge process, the coolant can fully contact the spindle, thereby improving the utilization rate of the coolant.

[0031] 2. Through the setting of the air cooling part, when the main shaft rotates, the driving gear can drive the impeller to rotate, so that the impeller drives the air flow around the main shaft and the motor, and takes away part of the heat generated during the operation of the motor and the main shaft, thereby cooling the main shaft and the motor, and assisting the cooling of the main shaft by the coolant.

[0032] 3. Through the setting of the liquid supply part, during the rotation of the spindle, the coolant enters the transfer box through the liquid supply pipe, and through the rotation connection between the transfer box and the connecting plate, the coolant continuously enters the liquid inlet tank from the liquid inlet pipe, continuously cooling the spindle.

[0033] 4. Through the setting of the nozzle, when the coolant is sprayed out, it can be guided by the nozzle so that the nozzle sprays the coolant on the edge of the driving gear, so that when the driving gear drives the driven gear to rotate, the driving gear and the driven gear are cooled, thereby avoiding thermal deformation of the driving gear and the driven gear, which affects the processing accuracy of the spindle.

[0034] 5. The collection element can collect the cooled coolant, facilitating its recycling. The first filter plate can filter the coolant to prevent foreign impurities from mixing with it. The collection element can collect the coolant, and the second filter plate can cooperate with the first filter plate to perform multi-stage filtration on the coolant. The coolant can then be pumped into the transfer box for recycling. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0036] Figure 2 It is the front view of the present invention;

[0037] Figure 3 For the present invention Figure 2 Isometric section view at center AA;

[0038] Figure 4 For the present invention Figure 3 A partial enlarged view of point B in the middle;

[0039] Figure 5 It is a left side view of the present invention;

[0040] Figure 6 For the present invention Figure 5 Isometric section view at mid-CC;

[0041] Figure 7 For the present invention Figure 5 Isometric section view at middle DD;

[0042] Figure 8 For the present invention Figure 7 A partial enlarged view of point E in the middle.

[0043] In the picture:

[0044] 1. Power mechanism; 11. Base; 12. Motor; 13. Spindle;

[0045] 2. Cooling mechanism; 21. Cooling chamber; 22. Liquid inlet tank; 23. Liquid outlet tank; 24. Air-cooled part; 241. Driving gear; 242. Driven gear; 243. Rotating shaft; 244. Impeller; 25. Mounting part; 251. Mounting box; 252. Air hole; 26. Liquid supply part; 261. Through hole; 262. Connecting plate; 263. Transfer box; 264. Fixed pipe; 265. Liquid supply pipe; 266. Liquid inlet pipe; 267. Nozzle; 27. Collecting part; 271. Collecting box; 272. First filter plate; 273. Return pipe; 274. First spring; 275. Second filter plate; 276. Solenoid valve; 277. Cam frame; 278. Fixed sleeve; 279. Abutment rod; 280. Second spring. DETAILED DESCRIPTION

[0046] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0047] like Figure 1 、 Figure 3 and Figure 5 As shown, an embodiment of the present invention discloses an electric spindle for a lathe, including a power mechanism 1, wherein the power mechanism 1 includes a base 11, a motor 12 is provided on the base 11, the motor 12 includes a stator and a rotor, a spindle 13 is fixedly connected to the rotor, the spindle 13 passes through the motor 12, a cooling mechanism 2 is provided at one end of the spindle 13, the cooling mechanism 2 includes a cooling chamber 21 opened at one end of the spindle 13, a liquid inlet trough 22 and a liquid outlet trough 23 are connected to the cooling chamber 21, and the liquid inlet trough 22 and the liquid outlet trough 23 extend through the spindle 13.

[0048] Specifically, when the lathe is working, the motor 12 is started, the rotor in the motor 12 rotates, and the rotor drives the spindle 13 to rotate. At the same time, coolant is supplied to the liquid inlet tank 22. The coolant cools the spindle 13 while flowing in the liquid inlet tank 22. Then the coolant flows into the cooling chamber 21, and then the coolant flows out of the spindle 13 through the liquid outlet tank 23. The coolant cools the spindle 13 while flowing in the liquid outlet tank 23.

[0049] By setting up the cooling chamber 21, the coolant can be supplied into the interior of the spindle 13 through the liquid inlet groove 22, so that the coolant cools the spindle from the inside, and in the process of the coolant flowing in the liquid inlet groove 22, the entire spindle 13 can also be cooled, and by setting up the liquid outlet groove 23, the cooled coolant can be discharged from the spindle 13 through the liquid outlet groove 23, and in the process of discharge, the coolant can fully contact with the spindle 13, thereby improving the utilization rate of the coolant.

[0050] Furthermore, the motor 12 is of existing technology and will not be described in detail.

[0051] like Figure 4 、 Figure 6 、 Figure 7 As shown, the cooling mechanism 2 also includes an air-cooling part 24, which includes a driving gear 241 fixedly connected to the end of the main shaft 13 away from the cooling chamber 21, and the air-cooling part 24 also includes six driven gears 242 evenly arranged along the circumferential direction, the driven gears 242 are engaged with the driving gear 241, and the driven gears 242 are fixedly sleeved on the rotating shaft 243, and the rotating shaft 243 is fixedly sleeved with an impeller 244.

[0052] Specifically, when in use, when the main shaft 13 rotates, the main shaft 13 drives the driving gear 241 to rotate, the driving gear 241 drives the driven gear 242 to rotate, the driven gear 242 drives the rotating shaft 243 to rotate, and the rotating shaft 243 drives the impeller 244 to rotate.

[0053] By setting the air-cooling part 24, when the main shaft 13 rotates, the driving gear 241 can drive the impeller 244 to rotate, so that the impeller 244 drives the air around the main shaft 13 and the motor 12 to flow, and take away part of the heat generated during the operation of the motor 12 and the main shaft 13, thereby cooling the main shaft 13 and the motor 12, and assisting the cooling of the main shaft 13 by the coolant.

[0054] like Figure 2 、 Figure 4 As shown, the rotating shaft 243 is connected to the motor 12 through a mounting member 25, and the mounting member 25 includes a mounting box 251 fixedly connected to the motor 12. The main shaft 13 extends into the mounting box 251, and the mounting box 251 is loosely sleeved on the main shaft 13. The driving gear 241 is located in the mounting box 251, and the rotating shaft 243 is rotatably connected to the inner wall of the mounting box 251. A plurality of air holes 252 are provided on a side wall of the mounting box 251 close to the motor 12 and a side wall away from the motor 12.

[0055] Specifically, during use, when the rotating shaft 243 rotates, the rotating shaft 243 drives the impeller 244 to rotate, and the impeller 244 drives the air in the installation box 251 to flow, so that external air enters the installation box 251 from the air hole 252 close to the motor 12, and then the air is discharged from the installation box 251 from the air hole 252 away from the motor 12.

[0056] By providing the mounting box 251 , the rotating shaft 243 can be mounted on the inner wall of the mounting box 251 , thereby enabling the air-cooling component 24 to be mounted.

[0057] like Figure 2 、 Figure 4 As shown, the installation box 251 is provided with a liquid supply part 26, and the liquid supply part 26 includes a through hole 261 opened on the side wall of the installation box 251 away from the motor 12, and a connecting plate 262 is rotatably connected in the through hole 261, and the connecting plate 262 is coaxial with the main shaft 13, and a transfer box 263 is rotatably provided on the connecting plate 262, and the transfer box 263 is fixedly connected to the installation box 251 through a fixing rod 264, and a liquid supply pipe 265 is provided in communication with the transfer box 263, and a liquid inlet pipe 266 is provided in communication with the connecting plate 262, one end of the liquid inlet pipe 266 is connected to the transfer box 263, and the other end of the liquid inlet pipe 266 is connected to the liquid inlet tank 22.

[0058] Specifically, when in use, the liquid supply pipe 265 is connected to the external liquid supply device, and the external liquid supply device supplies the coolant into the transfer box 263 through the liquid supply pipe 265. Then the coolant enters the liquid inlet tank 22 through the liquid inlet pipe 266 to cool the main shaft 13; during the rotation of the main shaft 13, the main shaft 13 drives the liquid inlet pipe 266 to rotate, and the liquid inlet pipe 266 drives the connecting plate 262 to rotate.

[0059] By setting the liquid supply part 26, during the rotation of the main shaft 13, the coolant enters the transfer box 263 through the liquid supply pipe 265, and through the rotation connection between the transfer box 263 and the connecting plate 262, the coolant continuously enters the liquid inlet tank 22 from the liquid inlet pipe 266, continuously cooling the main shaft 13.

[0060] like Figure 4 As shown, the liquid supply member 26 further includes a nozzle 267 fixedly connected to the liquid outlet groove 23 . The nozzle 267 is bent, and the nozzle opening of the nozzle 267 faces the edge of the driving gear 241 .

[0061] Specifically, during use, when the coolant is discharged from the liquid outlet groove 23 , the coolant is sprayed out through the nozzle 267 so that the coolant is sprayed on the edge of the driving gear 241 .

[0062] By setting the nozzle 267, when the coolant is sprayed, the nozzle 267 can guide the coolant to the edge of the driving gear 241 through the guidance of the nozzle 267, so that the driving gear 241 and the driven gear 242 are cooled when the driving gear 241 drives the driven gear 242 to rotate, thereby preventing the driving gear 241 and the driven gear 242 from thermal deformation, which would affect the processing accuracy of the main shaft 13.

[0063] like Figure 3 、 Figure 7As shown, the lower side of the installation box 251 is connected to a collecting member 27 , and the collecting member 27 includes a collecting box 271 connected to the lower end of the installation box 251 , and a first filter plate 272 is provided in the collecting box 271 .

[0064] Specifically, during use, after the coolant is sprayed out from the nozzle 267 , the coolant flows into the collection box 271 through the first filter plate 272 , and the first filter plate 272 filters the coolant.

[0065] By setting the collecting member 27, the cooled coolant can be collected, which is convenient for recycling the coolant, and by setting the first filter plate 272, the coolant can be filtered to prevent external impurities from mixing in the coolant.

[0066] like Figure 4 、 Figure 7 As shown, the collecting member 27 also includes a return pipe 273 connected to the bottom end of the collecting box 271, the return pipe 273 is connected to the transfer box 263, the first filter plate 272 is slidably connected in the collecting box 271, a first spring 274 is connected between the first filter plate 272 and the bottom wall of the collecting box 271, a second filter plate 275 is provided on the upper side of the first filter plate 272, the second filter plate 275 is slidably connected in the collecting box 271, the meshes on the first filter plate 272 and the second filter plate 275 are staggered, and a solenoid valve 276 is provided in the return pipe 273.

[0067] Specifically, during use, after the cooling liquid in the collection box 271 cools down, the second filter plate 275 moves downward. When the second filter plate 275 contacts the first filter plate 272, the mesh holes on the second filter plate 275 are misaligned with the mesh holes on the first filter plate 272, so that the first filter plate 272 and the second filter plate 275 are closed, and the cooling liquid in the collection box 271 is forced into the return pipe 273. Then the cooling liquid enters the transfer box 263 through the return pipe 273.

[0068] Through the setting of the collecting member 27, the coolant can be collected, and through the setting of the second filter plate 275, it can cooperate with the first filter plate 272 to perform multi-stage filtration on the coolant, and can press the coolant into the transfer box 263 to realize the recycling of the coolant.

[0069] Furthermore, the solenoid valve 276 is a prior art and will not be described in detail.

[0070] like Figure 7 、 Figure 8As shown, the collecting member 27 also includes a cam frame 277 fixedly mounted on the main shaft 13, and the cam frame 277 is located in the mounting box 251. A fixing sleeve 278 is fixedly connected to the inner wall of the mounting box 251, and an abutment rod 279 is slidably connected in the fixing sleeve 278. The upper end of the abutment rod 278 can contact the cam frame 277, and the bottom end of the abutment rod 278 is fixedly connected to the second filter plate 275. A second spring 280 is connected between the second filter plate 275 and the fixing sleeve 278.

[0071] Specifically, during use, when the main shaft 13 rotates, the main shaft 13 drives the cam frame 277 to rotate, and the cam frame 277 abuts against the abutment rod 278 during rotation, so that the abutment rod 278 moves downward, and the abutment rod 278 drives the second filter plate 275 to move downward, and the second filter plate 275 stretches the second spring 280, so that the second filter plate 275 cooperates with the first filter plate 272 to hydraulically output the cooling liquid; when the cam frame 277 is out of contact with the abutment rod 278, the second filter plate 275 and the abutment rod 278 are reset under the action of the second spring 280.

[0072] By setting the cam frame 277 , when the main shaft 13 rotates, the cam frame 277 can drive the second filter plate 275 to move up and down, thereby allowing the coolant to intermittently reflux for cooling.

[0073] Furthermore, a cooling device is provided on the bottom wall of the collection box 271. The cooling device is a prior art and will not be described in detail.

[0074] When in use, the cooling device cools the coolant in the collection tank 271 .

[0075] It should be noted that in the description of the present invention, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. These are merely for ease of description and are not intended to indicate or imply that the device or component described must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0076] Furthermore, it should be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0077] The term "comprise" or any other similar term is intended to cover non-exclusive inclusion, such that a process, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed or inherent to such process, article, or apparatus / device.

[0078] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

Claims

1. A lathe electric spindle, characterized in that: The invention comprises a power mechanism, the power mechanism comprises a base, a motor is provided on the base, the motor comprises a stator and a rotor, a main shaft is fixedly connected to the rotor, the main shaft passes through the motor, a cooling mechanism is provided at one end of the main shaft, the cooling mechanism comprises a cooling cavity provided at one end of the main shaft, a liquid inlet groove and a liquid outlet groove are provided in communication with the cooling cavity, and the liquid inlet groove and the liquid outlet groove extend through the main shaft; The cooling mechanism further includes an air-cooling member, the air-cooling member including a driving gear fixedly connected to an end of the main shaft away from the cooling chamber, the air-cooling member further including six driven gears evenly arranged along the circumferential direction, the driven gears meshing with the driving gear, the driven gears being fixedly sleeved on a rotating shaft, and an impeller being fixedly sleeved on the rotating shaft; The rotating shaft is connected to the motor through a mounting member, the mounting member includes a mounting box fixedly connected to the motor, the main shaft extends into the mounting box, the mounting box is loosely sleeved on the main shaft, the driving gear is located in the mounting box, the rotating shaft is rotatably connected to the inner wall of the mounting box, and a plurality of air holes are provided on a side wall of the mounting box close to the motor and a side wall away from the motor; The mounting box is provided with a liquid supply part, and the liquid supply part includes a through hole opened on a side wall of the mounting box away from the motor, a connecting plate is rotatably connected in the through hole, the connecting plate is coaxial with the main shaft, a transfer box is rotatably provided on the connecting plate, and the transfer box is fixedly connected to the mounting box through a fixing rod, a liquid supply pipe is provided in communication with the transfer box, and a liquid inlet pipe is provided in communication with the connecting plate, one end of the liquid inlet pipe is communicated with the transfer box, and the other end of the liquid inlet pipe is communicated with the liquid inlet tank; The liquid supply component further comprises a nozzle fixedly connected to the liquid outlet groove, the nozzle is bent, and the nozzle opening of the nozzle faces the edge of the driving gear.

2. The electric spindle for a lathe according to claim 1, characterized in that: The lower side of the installation box is connected to a collecting piece, and the collecting piece includes a collecting box connected to the lower end of the installation box, and a first filter plate is provided in the collecting box.

3. The electric spindle for a lathe according to claim 2, characterized in that: The collecting member also includes a return pipe connected to the bottom end of the collecting box, the return pipe is connected to the transfer box, the first filter plate is slidably connected to the collecting box, a first spring is connected between the first filter plate and the bottom wall of the collecting box, a second filter plate is provided on the upper side of the first filter plate, the second filter plate is slidably connected to the collecting box, the meshes on the first filter plate and the second filter plate are staggered, and a solenoid valve is provided in the return pipe.

4. The electric spindle for a lathe according to claim 3, characterized in that: The collecting piece also includes a cam frame fixedly sleeved on the main shaft, the cam frame is located in the mounting box, a fixing sleeve is fixedly connected to the inner wall of the mounting box, an abutment rod is slidably connected in the fixing sleeve, the upper end of the abutment rod can contact the cam frame, the bottom end of the abutment rod is fixedly connected to the second filter plate, and a second spring is connected between the second filter plate and the fixing sleeve.

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