High speed grinding wheel electric spindle

Abstract

The application relates to the field of high-end machine tool grinding equipment, in particular to a high-speed grinding wheel electric spindle, which comprises a shell and a spindle, a cooling channel is arranged in the shell along the length direction of the shell, the shell is provided with a liquid inlet and a liquid outlet on the upper side and the lower side, the liquid inlet and the liquid outlet are communicated through the cooling channel and a material inlet arranged in the shell, a filter screen is arranged at the liquid inlet along the horizontal direction, the filter screen is used for filtering the cooling liquid, a sewage discharge channel is arranged in the shell along the length direction of the shell, a sewage discharge port is arranged at the end of the shell far from the liquid inlet, the left end and the right end of the sewage discharge channel are communicated with the liquid inlet and the sewage discharge port respectively, a plugging assembly is arranged between the cooling channel and the sewage discharge channel, and the plugging assembly is used for controlling the opening and closing of the cooling channel and the sewage discharge channel. The application aims to effectively prevent the electric spindle from being damaged due to high temperature during the daily operation of the high-speed grinding wheel electric spindle.

Description

Technical Field

[0001] This application relates to the field of high-end machine tool grinding equipment, and in particular to a high-speed grinding wheel electric spindle. Background Technology

[0002] The high-speed development of machine tools has become an unstoppable trend. The high-speed electric spindle unit is a key component for realizing high-speed cutting. The high-speed electric spindle unit is an internal motor, which eliminates intermediate transmission links such as gears and belts, and realizes "zero transmission" of machine tools.

[0003] In related technologies, effective cooling of the electric spindle is crucial. Currently, electric spindles generally use a circulating liquid cooling method. An annular cooling jacket is machined around the front bearing and motor stator of the electric spindle. Coolant is delivered to the annular cooling jacket through the inlet channel of the jacket to cool the front bearing and stator, and then discharged through the outlet of the jacket. The main problem with this traditional cooling method is that the annular cooling jacket for the motor and bearing is limited by the wall thickness of the electric spindle jacket, resulting in a very small space height, generally around 2-4 mm. Impurities in the coolant easily accumulate in this narrow cooling cavity, forming cooling dead zones, uneven cooling, and in severe cases, blockages. This prevents coolant flow, leading to cooling failure and damage to the electric spindle. Summary of the Invention

[0004] This application provides a high-speed grinding wheel electric spindle, which aims to effectively solve the problem of impurities in the coolant causing blockage of the cooling channel during the cooling process of the high-speed grinding wheel electric spindle. This effectively ensures the smooth flow of coolant in the cooling channel, thereby ensuring the cooling effect of the high-speed grinding wheel electric spindle during daily operation and helping to prevent damage to the electric spindle due to high temperature during daily operation.

[0005] This application provides a high-speed grinding wheel electric spindle, which adopts the following technical solution:

[0006] A high-speed grinding wheel electric spindle includes a housing and a spindle. The housing has multiple cooling channels arranged in a circular array along its length. The housing has an inlet and an outlet connected to its upper and lower sides. The inlet and outlet are connected to a feed inlet located inside the housing via the cooling channels. A filter screen is installed horizontally at the inlet to filter the coolant. A drain channel is also provided along the length of the housing, with an outlet at the end of the housing furthest from the inlet. The drain channel is connected to the inlet and outlet at its left and right ends, respectively. A sealing assembly is provided between the cooling channels and the drain channel to control their opening and closing.

[0007] By adopting the above technical solution, when the filter screen does not need to be cleaned, the sealing component blocks the drain channel. In this state, the drain channel is closed and the cooling channel is open. The coolant added from the inlet directly enters the cooling channel to cool the outer shell. When cleaning the filter screen, the sealing component blocks the cooling channel. In this state, the drain channel is open and the cooling channel is closed. The clean water added from the inlet flushes the dirt on the filter screen into the drain channel.

[0008] This setup, compared to traditional filter cleaning methods that require removing the filter from the housing, cleaning it, and then reinstalling it, is cumbersome and inconvenient, significantly impacting the efficiency of the electric spindle. In this embodiment, cleaning the filter does not require removing it from the housing. Instead, the cooling channel is closed and the drain channel is opened using a sealing component. This alternating opening and closing of the cooling and drain channels eliminates the need for repeated filter removal, effectively improving cleaning efficiency and ensuring the efficient operation of the electric spindle.

[0009] Preferably, the sealing assembly includes a first sealing plate and a second sealing plate. The first sealing plate is vertically raised and lowered between the cooling channel and the drain channel, and the second sealing plate is horizontally slidably disposed within the housing. The first sealing plate and the second sealing plate are used to control the alternating opening and closing of the cooling channel and the drain channel.

[0010] By adopting the above technical solution, the first sealing plate is generally rectangular, and a movable groove for raising and lowering the first sealing plate is provided between the cooling channel and the drain channel. When the filter screen does not need to be cleaned, the first sealing plate is located in the drain channel, and the second sealing plate is located on one side of the cooling channel. In this state, the first sealing plate blocks the drain channel, and the cooling channel is open. At this time, coolant is injected into the cooling channel through the inlet to cool the inside of the shell. When the filter screen needs to be cleaned, the first sealing plate descends into the cooling channel through the movable groove, and at the same time, the second sealing plate slides to the entrance of the cooling channel. In this state, the drain channel is open, and the cooling channel is blocked by the cooperation of the first and second sealing plates. At this time, clean water enters the drain channel after cleaning the filter screen and is discharged through the drain outlet.

[0011] Preferably, the first sealing plate slides vertically while simultaneously driving the second sealing plate to slide horizontally.

[0012] By adopting the above technical solution, the first and second sealing plates can simultaneously seal the cooling channel, thereby improving the efficiency of sealing the cooling channel.

[0013] Preferably, a driving assembly is provided between the first sealing plate and the second sealing plate.

[0014] By adopting the above technical solution, the first sealing plate can slide synchronously with the second sealing plate through the drive component during the lifting and lowering process.

[0015] Preferably, the driving assembly includes a first driving plate and a second driving plate, both of which are located inside the housing. The first driving plate is connected to the first sealing plate, and the second driving plate is connected to the second sealing plate. The ends of the first driving plate and the second driving plate that are close to each other are connected together.

[0016] By adopting the above technical solution, the first sealing plate moves up and down in the vertical direction, and the first driving plate moves up and down in the horizontal direction at the same time. Then, the second driving plate moves down and down in the horizontal direction in the same time, and the second driving plate moves down and down in the horizontal direction in the same time.

[0017] Preferably, the ends of the first drive plate and the second drive plate that are close to each other are wedge-shaped, and the ends of the first drive plate and the second drive plate that are close to each other are wedge-shaped.

[0018] By adopting the above technical solution, the ends of the first drive plate and the second drive plate that are close to each other are set as wedge-shaped fits, so that the first drive plate drives the second drive plate to slide in the horizontal direction during the vertical lifting and lowering process.

[0019] Preferably, the first sealing plate and the first driving plate are connected by a first connecting plate and a second connecting plate. The first connecting plate and the second connecting plate are in an "L" shape. The first connecting plate is horizontally arranged and the second connecting plate is vertically arranged. The end of the first connecting plate away from the second connecting plate is connected to the first sealing plate by a vertically arranged connecting rod. The end of the second connecting plate away from the first connecting plate is connected to the first driving plate. A pressing plate is integrally connected to the top of the first connecting plate in the horizontal direction.

[0020] By adopting the above technical solution, in specific use, the user drives the first connecting plate downward by pressing the plate, and the first connecting plate drives the first sealing plate and the first driving plate to move downward synchronously.

[0021] Preferably, a return spring is installed horizontally on the side of the second sealing plate near the second driving plate.

[0022] By adopting the above technical solution, when the cooling channel needs to be opened, the first drive plate moves up. In this state, the second sealing plate is slid and reset away from the cooling channel by the reset spring.

[0023] Preferably, a plurality of cooling air nozzles are installed in the cooling channel near the drain outlet, and the plurality of cooling air nozzles are evenly spaced in the cooling channel.

[0024] By adopting the above technical solution, the cold air nozzle sprays cold air into the cooling channel, further improving the cooling effect on the outer casing. Simultaneously, the direction of the cold air injection is consistent with the flow direction of the coolant, thus accelerating the flow of the coolant within the cooling channel and effectively preventing coolant accumulation during its flow, ensuring the smooth flow of coolant within the channel.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. When the filter screen does not need cleaning, the sealing component blocks the drain channel. In this state, the drain channel is closed and the cooling channel is open. The coolant added from the inlet directly enters the cooling channel to cool the outer shell. When cleaning the filter screen, the sealing component blocks the cooling channel. In this state, the drain channel is open and the cooling channel is closed. The clean water added from the inlet flushes the dirt on the filter screen into the drain channel.

[0027] This setup, compared to the traditional filter cleaning method which requires removing the filter from the housing, cleaning it, and then reinstalling it, is cumbersome and inconvenient, significantly impacting the efficiency of the electric spindle. In this embodiment, cleaning the filter does not require removing it from the housing. Instead, the cooling channel is closed and the drain channel is opened using a sealing component. This alternating opening and closing of the cooling and drain channels eliminates the need for repeated filter removal, thus improving cleaning efficiency and ensuring the efficient operation of the electric spindle.

[0028] 2. The first sealing plate is generally rectangular, with a movable groove between the cooling channel and the drain channel for raising and lowering the first sealing plate. When the filter screen does not need cleaning, the first sealing plate is located in the drain channel, and the second sealing plate is located on one side of the cooling channel. In this state, the first sealing plate blocks the drain channel, and the cooling channel is open. At this time, coolant is injected into the cooling channel through the inlet to cool the interior of the casing. When the filter screen needs cleaning, the first sealing plate descends into the cooling channel through the movable groove, while the second sealing plate slides to the inlet of the cooling channel. In this state, the drain channel is open, and the cooling channel is blocked by the cooperation of the first and second sealing plates. At this time, clean water enters the drain channel after cleaning the filter screen and is discharged through the drain outlet.

[0029] 3. The air nozzles spray cold air into the cooling channels, further enhancing the cooling effect on the casing. Simultaneously, the direction of the cold air injection aligns with the flow direction of the coolant, thus accelerating the flow of the coolant within the channels and effectively preventing coolant buildup, ensuring smooth coolant flow. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0031] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0032] Figure 3 This is a structural schematic diagram illustrating the positional relationship of multiple cooling channels inside the housing, as specifically shown in an embodiment of this application;

[0033] Figure 4 This is a schematic diagram illustrating the connection between the liquid inlet and the cooling channel in a specific embodiment of this application;

[0034] Figure 5 yes Figure 1 Enlarged schematic diagrams of point A under different conditions;

[0035] Figure 6 This is a schematic diagram illustrating the structure connecting the feed inlet and multiple cooling channels in a specific embodiment of this application.

[0036] Reference numerals: 1. Outer shell; 2. Main shaft; 3. Cooling channel; 4. Liquid inlet; 5. Liquid outlet; 6. Feed inlet; 7. Filter screen; 8. Drainage channel; 9. Drainage outlet; 10. First sealing plate; 11. Second sealing plate; 12. First drive plate; 13. Second drive plate; 14. First connecting plate; 15. Second connecting plate; 16. Connecting rod; 17. Pressing plate; 18. Return spring; 19. Cold air nozzle. Detailed Implementation

[0037] The following is in conjunction with the appendix Figure 1 -Appendix Figure 6 This application will be described in further detail below.

[0038] Example:

[0039] This application discloses a high-speed grinding wheel electric spindle, referring to... Figure 1 , Figure 2 as well as Figure 3 It includes a housing 1 and a main shaft 2. The left and right ends of the main shaft 2 are mounted inside the housing 1 via corresponding bearings, and a stator and rotor are mounted on the periphery of the main shaft 2 for driving. (Refer to...) Figure 4 The outer shell 1 has cooling channels 3 along its length. There are multiple cooling channels 3, which are evenly distributed in a circular array inside the outer shell 1. These cooling channels 3 are connected to each other through a feed port 6.

[0040] At the same time, refer to Figure 1 , Figure 2 as well as Figure 3 The upper and lower sides of the outer casing 1 are connected to liquid inlet 4 and liquid outlet 5, and the liquid inlet 4 and liquid outlet 5 are connected to each other through cooling channel 3 and material passage 6 opened inside the outer casing 1.

[0041] Reference Figure 4 , Figure 5 as well as Figure 6 During operation, the electric spindle adds coolant to the cooling channel 3 through the inlet 4, and then flows through the cooling channel 3 and the feed port 6 to the outlet 5 for discharge, thereby cooling the interior of the outer casing 1.

[0042] Reference Figure 1 and Figure 2A filter screen 7 is installed horizontally at the bottom of the inlet 4. Before the coolant enters the cooling channel 3 through the inlet 4, the filter screen 7 filters the coolant, effectively preventing contaminants in the coolant from entering the cooling channel 3 and avoiding the accumulation of impurities in the coolant in the cooling channel 3. At the same time, a drain channel 8 is provided inside the outer casing 1 along its length, and a drain port 9 is provided at the end of the outer casing 1 away from the inlet 4. The left and right ends of the drain channel 8 are connected to the inlet 4 and the drain port 9, respectively.

[0043] After prolonged use, filter screen 7 needs to be cleaned. Specifically, when cleaning filter screen 7, inject clean water through the liquid inlet 4 to rinse filter screen 7. The clean water after cleaning filter screen 7 flows into the drain channel 8 and is discharged from the drain outlet 9.

[0044] It should be noted that some impurities in the coolant are small stains. These stains adhere to the filter screen as it passes through, and the filter screen blocks these stains, thus effectively preventing the stains mixed in with the coolant from entering the cooling channels.

[0045] Meanwhile, a sealing component is installed between the cooling channel 3 and the drain channel 8. The sealing component is used to control the opening and closing of the cooling channel 3 and the drain channel 8. When the filter screen 7 does not need to be cleaned, the sealing component seals the drain channel 8. In this state, the drain channel 8 is closed and the cooling channel 3 is open. The coolant added from the liquid inlet 4 directly enters the cooling channel 3 to cool the outer shell 1. When cleaning the filter screen 7, the sealing component seals the cooling channel 3. In this state, the drain channel 8 is open and the cooling channel 3 is closed. The clean water added from the liquid inlet 4 flushes the dirt on the filter screen 7 into the drain channel 8.

[0046] This setup differs from traditional methods where cleaning the filter 7 requires removing it from the housing 1, cleaning it, and then reinstalling it. This cumbersome process necessitates repeated removal and installation of the filter 7, significantly impacting the efficiency of the electric spindle. In this embodiment, cleaning the filter 7 does not require separate removal from the housing 1. Instead, the cooling channel 3 is closed using a sealing assembly, while the drain channel 8 is opened. This alternating opening and closing of the cooling channel 3 and drain channel 8 eliminates the need for repeated removal and installation, thus improving cleaning efficiency and ensuring the efficient operation of the electric spindle.

[0047] Specifically, refer to Figure 1 and Figure 2The sealing assembly includes a first sealing plate 10 and a second sealing plate 11. The first sealing plate 10 is vertically raised and lowered between the cooling channel 3 and the drain channel 8. The second sealing plate 11 is horizontally slidably disposed inside the housing 1. The first sealing plate 10 and the second sealing plate 11 are used to control the alternating opening and closing of the cooling channel 3 and the drain channel 8.

[0048] The first sealing plate 10 is generally rectangular in shape, and a movable groove for raising and lowering the first sealing plate 10 is provided between the cooling channel 3 and the sewage discharge channel 8. The first sealing plate 10 and the sewage discharge channel 8 are adapted to each other. After the first sealing plate 10 enters the sewage discharge channel 8, the two sides of the first sealing plate 10 and the inner walls of the two sides of the sewage discharge channel 8 remain tightly attached, thereby effectively ensuring the sealing effect of the first sealing plate 10 on the sewage discharge channel 8.

[0049] When the filter screen 7 does not need to be cleaned, the first sealing plate 10 is located inside the drain channel 8, and the second sealing plate 11 is located on one side of the cooling channel 3. In this state, the first sealing plate 10 blocks the drain channel 8, and the cooling channel 3 is in the open state. At this time, the coolant is injected into the cooling channel 3 through the inlet 4 to cool the inside of the outer shell 1. When the filter screen 7 needs to be cleaned, the first sealing plate 10 descends into the cooling channel 3 through the movable groove, and at the same time, the second sealing plate 11 slides to the inlet of the cooling channel 3. In this state, the drain channel 8 is in the open state, and the cooling channel 3 is blocked by the cooperation of the first sealing plate 10 and the second sealing plate 11. At this time, after the filter screen 7 is cleaned, clean water enters the drain channel 8 and is discharged through the drain outlet 9.

[0050] Specifically, while the first sealing plate 10 slides vertically, it drives the second sealing plate 11 to slide horizontally synchronously. This allows the first sealing plate 10 and the second sealing plate 11 to seal the cooling channel 3 simultaneously, thereby improving the efficiency of sealing the cooling channel 3.

[0051] Specifically, a driving assembly is provided between the first sealing plate 10 and the second sealing plate 11. During the lifting and lowering process, the first sealing plate 10 synchronously drives the second sealing plate 11 to slide.

[0052] Reference Figure 1 and Figure 2 The drive assembly includes a first drive plate 12 and a second drive plate 13. Both the first drive plate 12 and the second drive plate 13 are located inside the housing 1. The first drive plate 12 is connected to the first sealing plate 10, and the second drive plate 13 is connected to the second sealing plate 11. The ends of the first drive plate 12 and the second drive plate 13 that are close to each other are connected together.

[0053] During the vertical lifting and lowering process, the first sealing plate 10 simultaneously drives the first drive plate 12 to lift and lower. While the first drive plate 12 is lifting and lowering, it simultaneously drives the second drive plate 13 to slide in the horizontal direction, thereby using the second drive plate 13 to simultaneously drive the second sealing plate 11 to slide in the horizontal direction.

[0054] Specifically, the ends of the first drive plate 12 and the second drive plate 13 that are close to each other are both wedge-shaped, and the ends of the first drive plate 12 and the second drive plate 13 that are close to each other are wedge-shaped. By setting the ends of the first drive plate 12 and the second drive plate 13 that are close to each other as wedge-shaped, the first drive plate 12 drives the second drive plate 13 to slide in the horizontal direction during the vertical lifting and lowering process.

[0055] Specifically, refer to Figure 1 and Figure 2 The first sealing plate 10 and the first driving plate 12 are connected by a first connecting plate 14 and a second connecting plate 15. The first connecting plate 14 and the second connecting plate 15 are generally L-shaped. The first connecting plate 14 is horizontally positioned, and the second connecting plate 15 is vertically positioned. The end of the first connecting plate 14 furthest from the second connecting plate 15 is connected to the first sealing plate 10 via a vertically positioned connecting rod 16, and the end of the second connecting plate 15 furthest from the first connecting plate 14 is connected to the first driving plate 12. Simultaneously, a pressing plate 17 is integrally connected to the top of the first connecting plate 14 in a horizontal direction. In actual use, the user drives the first connecting plate 14 downwards using the pressing plate 17, thereby causing the first sealing plate 10 and the first driving plate 12 to move downwards synchronously.

[0056] Furthermore, referring to Figure 1 and Figure 2 A return spring 18 is installed horizontally on the side of the second sealing plate 11 near the second drive plate 13. When the cooling channel 3 needs to be opened, the first drive plate 12 moves upward. In this state, the return spring 18 is used to slide the second sealing plate 11 away from the cooling channel 3 to reset it.

[0057] Specifically, refer to Figure 4 and Figure 5When it is necessary to connect the inlet 4 and the cooling channel 3, the pressing plate 17 is pulled upward. During the upward movement of the pressing plate 17, the first driving plate 12 is moved upward through the first connecting plate 14 and the second connecting plate 15. During the upward movement of the first driving plate 12, the second driving plate 13 slides away from the cooling channel 3 as the return spring 18 rebounds. During the sliding process, the second driving plate 13 simultaneously drives the second sealing plate 11 to slide away from the cooling channel 3 until the second sealing plate 11 disengages from the cooling channel 3. As the second sealing plate 11 disengages from the cooling channel 3, the inlet 4 and the cooling channel 3 are connected, and the coolant flows into the cooling channel 3 from the inlet 4 for cooling.

[0058] At the same time, as the pressing plate 17 is pulled upward, the pressing plate 17 simultaneously drives the first sealing plate 10 to rise towards the sewage channel 8 during the upward movement, until the first sealing plate 10 rises into the sewage channel 8 to complete the sealing of the sewage channel 8.

[0059] In this state, the liquid inlet 4 and the cooling channel 3 remain connected, while the liquid inlet 4 and the drain channel 8 are blocked.

[0060] Furthermore, referring to Figure 1 and Figure 2 Multiple air nozzles 19 are installed near the drain port 5 within the cooling channel 3, with the nozzles evenly spaced. The nozzles spray cool air into the cooling channel 3, further enhancing the cooling effect on the outer casing 1. Simultaneously, the direction of airflow is aligned with the direction of coolant flow, thus accelerating the flow of coolant within the cooling channel 3 and effectively preventing coolant buildup, ensuring smooth coolant flow.

[0061] The implementation principle of a high-speed grinding wheel electric spindle in this application embodiment is as follows:

[0062] A filter screen 7 is installed horizontally at the liquid inlet 4. Before the coolant enters the cooling channel 3 through the liquid inlet 4, the filter screen 7 filters the coolant, effectively preventing contaminants in the coolant from entering the cooling channel 3 and avoiding the accumulation of impurities in the coolant in the cooling channel 3. At the same time, a drain channel 8 is provided inside the outer casing 1 along its length, and a drain port 9 is provided at the end of the outer casing 1 away from the liquid inlet 4. The left and right ends of the drain channel 8 are connected to the liquid inlet 4 and the drain port 9, respectively.

[0063] After prolonged use, filter screen 7 needs to be cleaned. Specifically, when cleaning filter screen 7, inject clean water through the liquid inlet 4 to rinse filter screen 7. The clean water after cleaning filter screen 7 flows into the drain channel 8 and is discharged from the drain outlet 9.

[0064] Meanwhile, a sealing component is installed between the cooling channel 3 and the drain channel 8. The sealing component is used to control the opening and closing of the cooling channel 3 and the drain channel 8. When the filter screen 7 does not need to be cleaned, the sealing component seals the drain channel 8. In this state, the drain channel 8 is closed and the cooling channel 3 is open. The coolant added from the liquid inlet 4 directly enters the cooling channel 3 to cool the outer shell 1. When cleaning the filter screen 7, the sealing component seals the cooling channel 3. In this state, the drain channel 8 is open and the cooling channel 3 is closed. The clean water added from the liquid inlet 4 flushes the dirt on the filter screen 7 into the drain channel 8.

[0065] This setup differs from traditional methods where cleaning the filter 7 requires removing it from the housing 1, cleaning it, and then reinstalling it. This cumbersome process necessitates repeated removal and installation of the filter 7, significantly impacting the efficiency of the electric spindle. In this embodiment, cleaning the filter 7 does not require separate removal from the housing 1. Instead, the cooling channel 3 is closed using a sealing assembly, while the drain channel 8 is opened. This alternating opening and closing of the cooling channel 3 and drain channel 8 eliminates the need for repeated removal and installation, thus improving cleaning efficiency and ensuring the efficient operation of the electric spindle.

[0066] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A high-speed grinding wheel electric spindle, characterized in that: The device includes a housing (1) and a main shaft (2). A cooling channel (3) is formed inside the housing (1) along its length. Multiple cooling channels (3) are arranged in a circular array, evenly spaced inside the housing (1). An inlet (4) and a outlet (5) are connected to the upper and lower sides of the housing (1). The inlet (4) and outlet (5) are connected via the cooling channels (3) and a feed inlet (6) inside the housing (1). A filter screen (7) is installed horizontally at the liquid inlet (4). A drain channel (8) is provided inside the outer shell (1) along its length. A drain outlet (9) is provided at one end of the outer shell (1) away from the liquid inlet (4). The left and right ends of the drain channel (8) are connected to the liquid inlet (4) and the drain outlet (9) respectively. A sealing component is provided between the cooling channel (3) and the drain channel (8). The sealing component is used to control the opening and closing of the cooling channel (3) and the drain channel (8). The sealing assembly includes a first sealing plate (10) and a second sealing plate (11). The first sealing plate (10) is vertically raised and lowered between the cooling channel (3) and the drain channel (8). The second sealing plate (11) is horizontally slidably disposed inside the housing (1). The first sealing plate (10) and the second sealing plate (11) are used to control the alternating opening and closing of the cooling channel (3) and the drain channel (8).

2. The high-speed grinding wheel electric spindle according to claim 1, characterized in that: While the first sealing plate (10) slides vertically, it drives the second sealing plate (11) to slide synchronously in the horizontal direction.

3. A high-speed grinding wheel electric spindle according to claim 2, characterized in that: A drive assembly is provided between the first sealing plate (10) and the second sealing plate (11).

4. A high-speed grinding wheel electric spindle according to claim 3, characterized in that: The drive assembly includes a first drive plate (12) and a second drive plate (13). The first drive plate (12) and the second drive plate (13) are both located inside the housing (1). The first drive plate (12) is connected to the first sealing plate (10), and the second drive plate (13) is connected to the second sealing plate (11). The ends of the first drive plate (12) and the second drive plate (13) that are close to each other are connected together.

5. A high-speed grinding wheel electric spindle according to claim 4, characterized in that: The ends of the first drive plate (12) and the second drive plate (13) that are close to each other are wedge-shaped, and the ends of the first drive plate (12) and the second drive plate (13) that are close to each other are wedge-shaped.

6. A high-speed grinding wheel electric spindle according to claim 5, characterized in that: The first sealing plate (10) and the first driving plate (12) are connected by a first connecting plate (14) and a second connecting plate (15). The first connecting plate (14) and the second connecting plate (15) are in an "L" shape. The first connecting plate (14) is horizontally arranged and the second connecting plate (15) is vertically arranged. The end of the first connecting plate (14) away from the second connecting plate (15) is connected to the first sealing plate (10) through a vertically arranged connecting rod (16). The end of the second connecting plate (15) away from the first connecting plate (14) is connected to the first driving plate (12). The top of the first connecting plate (14) is integrally connected with a pressing plate (17) in the horizontal direction.

7. A high-speed grinding wheel electric spindle according to claim 6, characterized in that: A return spring (18) is installed horizontally on the side of the second sealing plate (11) near the second drive plate (13).

8. A high-speed grinding wheel electric spindle according to claim 7, characterized in that: Multiple air nozzles (19) are installed in the cooling channel (3) near the drain port (5), and the multiple air nozzles (19) are evenly spaced in the cooling channel (3).

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