A cutting machine's falling potential difference liquid cooling structure

Abstract

This invention belongs to the field of cutting machine technology, specifically a liquid cooling structure for a cutting machine based on gravity difference. The proposed solution includes: a gravity difference mechanism that prevents liquid backflow through gravity and potential energy difference; a main body mounted on the gravity difference mechanism; a motor that moves through the gravity difference mechanism; and a rotating shaft that is rotatably mounted within the motor, serving as the motor's power output. In this invention, the gravity difference cylinder is inclined at an angle to the horizontal plane, allowing the coolant to flow along its inner wall and exit back into the main body through its end. The angle between the gravity difference cylinder and the rotating shaft, and their optimal positions, ensure that coolant mist does not penetrate the gravity difference cylinder. The gravity difference cylinder has excellent waterproof capabilities, eliminating the need for sealed bearings compared to existing technologies. By preventing liquid backflow through gravity and potential energy difference, the structure offers advantages such as simplicity and excellent waterproofing.

Description

Technical Field

[0001] This invention relates to the field of cutting machine technology, and in particular to a liquid cooling structure for a cutting machine based on the drop pressure difference. Background Technology

[0002] The cutting machine needs to be powered by a motor to drive the cutting saw blade to rotate at high speed to cut the workpiece. The high-speed rotation of the cutting saw blade rolls the coolant into a coolant mist inside the main body. The rotating shaft of the motor needs to extend into the main body. A waterproof component is needed between the main body and the rotating shaft to prevent the coolant mist from passing through the main body and contacting the motor, so as to prevent problems such as leakage and short circuit in the current circuit. Existing waterproof components use sealed bearings to prevent coolant mist from passing through the main body and contacting the motor. The rotating shaft rotates within the sealed bearing. As the shaft rotates, the high-speed rotation and friction of the rolling elements inside the sealed bearing generates heat, and the sealing components also generate heat through friction. This results in poor sealing performance and complex components that are inconvenient to use. Therefore, there is an urgent need to provide a liquid cooling structure based on the drop pressure difference for cutting machines. Summary of the Invention

[0003] Based on the technical problems in the background art, the present invention proposes a liquid cooling structure for a cutting machine based on the drop pressure difference.

[0004] This invention proposes a liquid cooling structure for a cutting machine based on the drop potential difference, comprising: a drop potential difference mechanism that blocks liquid backflow through gravity and potential energy difference; a main body mounted on the drop potential difference mechanism; a motor that movably passes through the drop potential difference mechanism; and a rotating shaft that is rotatably mounted through the motor and serves as the motor's power output end. The drop potential difference mechanism includes: an elliptical cylinder, one end of which is integrally formed and fixed to the side of the main body; a drop potential cylinder that is detachably fixed to the inside of the main body, with its end aligned with one end of the elliptical cylinder; and a liquid-proof gasket that is fitted against the side of the main body and located at one end of the elliptical cylinder.

[0005] Preferably, the surface of the main body is integrally formed and fixedly provided with multiple reinforcing ribs, the top of the main body is fixedly provided with a support frame, the top of the main body is fixedly provided with a primary baffle, the top of the main body is detachably provided with a cutting table, the surface of the cutting table is provided with scale lines, and the back opening of the main body is provided with an overflow port and a drain port, with the drain port located directly below the overflow port.

[0006] Preferably, a support beam is fixedly provided on the side of the top of the main body, a drainage channel is provided on one side of the top of the main body, and an extension shaft is detachably and fixedly sleeved on one end of the rotating shaft.

[0007] Preferably, a pressing plate is detachably fixed to one end of the extension shaft, a cutting saw blade is detachably fixed to one end of the extension shaft, a long bolt is threaded into one end of the extension shaft, and the cutting saw blade and the pressing plate are detachably fixed to one end of the extension shaft by the long bolt.

[0008] Preferably, the other end of the extension shaft is provided with a plurality of short bolts, the ends of which are inserted into a notch at one end of the rotating shaft, so that the extension shaft is detachably and fixedly sleeved on one end of the rotating shaft by the short bolts.

[0009] Preferably, the rotating shaft and the extension shaft are movably inserted through the middle of the settling cylinder, and the rotating shaft and the extension shaft do not contact the inner wall of the settling cylinder. The angle between the settling cylinder and the horizontal plane is 30°-40°, preferably 35°. The settling cylinder is integrally injection molded from hard wear-resistant plastic, and the inner wall is treated with a hydrophobic coating.

[0010] Preferably, the elliptical cylinder is integrally cast with the main body using metal material, the major axis of the ellipse on the inner wall of the ellipse is 34mm-36mm, preferably 35mm, and the minor axis of the ellipse on the inner wall of the ellipse is 29mm-31mm, preferably 30mm.

[0011] Preferably, the top of the rotating shaft is the first surface, the left side of the rotating shaft is the second surface, the right side of the rotating shaft is the third surface, and the bottom of the rotating shaft is the fourth surface. The distance between the third surface of the rotating shaft and the inner wall of the elliptical cylinder is 14.5mm-15.5mm, preferably 15mm; the distance between the second surface of the rotating shaft and the inner wall of the elliptical cylinder is 6mm-7mm, preferably 6.5mm; the distance between the first surface of the rotating shaft and the inner wall of the elliptical cylinder is 4.5mm-5.5mm, preferably 5mm; and the distance between the fourth surface of the rotating shaft and the inner wall of the elliptical cylinder is 6mm-7mm, preferably 6.5mm.

[0012] Preferably, the anti-liquid gasket is molded from oil- and liquid-resistant rubber material. The anti-liquid gasket is annular in shape, and the inner diameter of the anti-liquid gasket is the same as the minor axis of the elliptical cylinder. The center of the anti-liquid gasket does not coincide with the center of symmetry of the elliptical cylinder. The offset distance is 4.5mm-5.5mm, preferably 5mm. The distance between the inner side of the anti-liquid gasket and the third surface of the rotating shaft is 5mm.

[0013] Preferably, the thickness of the end of the settling cylinder near the inner wall of the main body is 2mm-3mm, and the thickness of the end of the settling cylinder away from the inner wall of the main body is 4mm-5mm. That is, the thickness of the end of the settling cylinder near the inner wall of the main body is less than the thickness of the end of the settling cylinder away from the inner wall of the main body. The included angle between the inner wall of the settling cylinder and the axial direction of the extension shaft is 1°-2°, preferably 1.5°.

[0014] The beneficial effects of this invention are as follows: by designing the fall cylinder at an angle of 30°-40° to the horizontal plane, combined with the hydrophobic coating on the inner wall of the fall cylinder, the coolant thrown to the inner wall by the airflow is liquefied and then flows back to the main body under the action of gravity. The backflow of liquid is fundamentally blocked by gravity and potential energy difference, which replaces the traditional sealed bearing structure, avoids the problems of friction heat and aging failure of the seals, and makes the waterproof effect more durable. When the rotating shaft and the extension shaft rotate at high speed, their surfaces rub against the air to form a high-speed airflow barrier. The non-circular structure of the elliptical cylinder guides and strengthens the airflow, preventing the coolant mist from passing through the airflow barrier and contacting the motor. At the same time, the inner wall of the fall cylinder forms an angle of 1°-2° with the axial direction of the extension shaft, causing the distance between the airflow and the inner wall of the fall cylinder to gradually decrease. The liquid mist cools and liquefies rapidly during the friction with the inner wall, further enhancing the coolant mist blocking effect. The center of the anti-liquid gasket is offset from the center of symmetry of the elliptical cylinder by 4.5mm-5.5mm, and the inner diameter matches the short axis of the elliptical cylinder. It precisely fits the gap between the elliptical cylinder and the rotating shaft, effectively blocking the intrusion of dust and liquid flow, while avoiding contact with the high-speed rotating shaft. There is no frictional loss, which improves the service life of the anti-liquid gasket. All components of this invention adopt a detachable connection structure. The extension shaft is connected to the rotating shaft by a short bolt, the cutting saw blade is connected to the extension shaft by a long bolt, and the drop cylinder is detachably fixed inside the main body. Assembly and maintenance are convenient, and the overall structure is simple with no complicated sealing components, which reduces the production and use costs of the cutting machine. The main body is equipped with arrayed reinforcing ribs, and the top support frame and support beam form a support framework, which greatly improves the structural strength and load-bearing capacity of the main body. The scale lines on the cutting table enable precise positioning of the workpiece for cutting, and the drainage channel has a drainage function, which improves the safety of the cutting machine. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a liquid cooling structure for a cutting machine based on the drop pressure difference proposed in this invention. Figure 2 This is a schematic diagram of the main body structure of a liquid cooling structure for a cutting machine based on the drop pressure difference proposed in this invention. Figure 3 This is a schematic cross-sectional view of the liquid cooling structure based on the drop pressure difference of a cutting machine proposed in this invention. Figure 4 This is a schematic cross-sectional view of the potential difference mechanism of the liquid cooling structure for a cutting machine proposed in this invention. Figure 5 This is a cross-sectional schematic diagram of the potential difference mechanism of the liquid cooling structure for a cutting machine proposed in this invention. Figure 6This is a cross-sectional schematic diagram of the drop difference mechanism of the drop difference liquid cooling structure for a cutting machine proposed in this invention. Figure 7 This is a schematic diagram of the cross-section of an elliptical cylinder of a liquid cooling structure for a cutting machine based on the drop pressure difference proposed in this invention. Figure 8 This is a schematic diagram of the anti-liquid gasket structure of a liquid cooling structure for a cutting machine based on the drop pressure difference, as proposed in this invention.

[0016] In the diagram: 1. Main body; 2. Reinforcing rib; 3. Support frame; 4. Initial baffle; 5. Support beam; 6. Cutting table; 7. Motor; 8. Elliptical cylinder; 9. Drop cylinder; 10. Rotating shaft; 10. Second surface; 101. Second surface; 102. Third surface; 103. Fourth surface; 104. Extension shaft; 11. Pressing plate; 12. Cutting saw blade; 13. Long bolt; 14. Short bolt; 15. Drainage channel; 16. Anti-liquid gasket; 17. Scale line; 18. Overflow port; 19. Drainage port; 20. Detailed Implementation

[0017] Reference Figures 1 to 8 A liquid cooling structure for a cutting machine based on potential difference includes: a potential difference mechanism that blocks the backflow of coolant through gravity and potential energy difference; a main body 1 mounted on the potential difference mechanism, which is fixedly mounted on the side of the main body 1; a motor 7 movably passing through the potential difference mechanism, wherein the motor 7 is a high-speed motor that can be obtained through market purchase or private customization; and a rotating shaft 10 rotatably passing through the motor 7, which serves as the power output end of the motor 7, and drives the rotating shaft 10 to rotate after the motor 7 is connected to a power source.

[0018] In this invention, the drop pressure mechanism includes: an elliptical cylinder 8, which is integrally formed and fixedly disposed on the side of the main body 1; a drop pressure cylinder 9, which is detachably fixedly disposed on the inner side of the main body 1, with the end of the drop pressure cylinder 9 and the end of the elliptical cylinder 8 being connected; one end of the rotating shaft 10 passing through the center of the elliptical cylinder 8 without contact and extending into the interior of the drop pressure cylinder 9; and a liquid-proof gasket 17, which is fitted against the side of the main body 1, and the liquid-proof gasket 17 is located at one end of the elliptical cylinder 8 and below one end of the rotating shaft 10. The liquid-proof gasket 17 can block the intrusion of dust and liquid.

[0019] In this invention, a plurality of reinforcing ribs 2 are integrally formed and fixedly provided on the surface of the main body 1. The plurality of reinforcing ribs 2 are arranged in an array on the surface of the main body 1. The plurality of reinforcing ribs 2 increase the load-bearing capacity of the main body 1. A support frame 3 is fixedly provided on the top of the main body 1. A primary baffle 4 is fixedly provided on the top of the main body 1. The primary baffle 4 is used to block the coolant.

[0020] In this invention, a support beam 5 is fixedly installed on the side of the top of the main body 1. The support beam 5 is located to the lower left of the initial baffle 4. A cutting table 6 is detachably installed on the top of the main body 1. The surface of the cutting table 6 is provided with scale lines 18. An overflow port 19 and a drain port 20 are provided at the back opening of the main body 1. The drain port 20 is located directly below the overflow port 19. The overflow port 19 can automatically drain excess coolant when too much coolant is added to the cooling container, preventing excessive coolant from flowing out of the cooling container and causing a short circuit in the motor. The drain port 20 is located... At the bottom of the main body 1, all the coolant inside the main body 1 can be drained through the drain port 20. A drain channel 16 is provided on one side of the top of the main body 1. The drain channel 16 can drain the coolant radiating from the edge of the main body 1 into the interior of the main body 1, preventing the coolant from contacting the motor 7 and increasing the waterproof capability of the main body 1. One end of the rotating shaft 10 is detachably and fixedly fitted with an extension shaft 11. The extension shaft 11 increases the length of the rotating shaft 10, so that the cutting saw blade 13 is located on the right side of the drop cylinder 9, and the cutting saw blade 13 does not contact the end of the drop cylinder 9.

[0021] In this invention, a pressing plate 12 is detachably fixed to one end of the extension shaft 11. The pressing plate 12 is sleeved on one end of the extension shaft 11. A cutting saw blade 13 is detachably fixed to one end of the extension shaft 11. The pressing plate 12 abuts against the middle of the cutting saw blade 13, pressing the cutting saw blade 13 against one end of the extension shaft 11. A long bolt 14 is threaded into one end of the extension shaft 11. The cutting saw blade 13 and the pressing plate 12 are detachably fixed to one end of the extension shaft 11 by the long bolt 14.

[0022] In this invention, a plurality of short bolts 15 are embedded at the other end of the extension shaft 11. The ends of the short bolts 15 are inserted into the notches at one end of the rotating shaft 10, so that the extension shaft 11 is detachably and fixedly sleeved on one end of the rotating shaft 10 by the short bolts 15. The short bolts 15 are picked up by a screwdriver and rotated by the screwdriver, so that the short bolts 15 rotate into the other end of the extension shaft 11. Then the ends of the short bolts 15 are inserted into the notches at one end of the rotating shaft 10, so that the rotating shaft 10 and the extension shaft 11 are detachably and fixedly sleeved together.

[0023] In this invention, the rotating shaft 10 and the extension shaft 11 are movably inserted through the middle of the settling cylinder 9. The settling cylinder 9 has an angle of 30°-40° with the horizontal plane. The settling cylinder 9 is integrally injection molded from hard wear-resistant plastic, and the inner wall is treated with a hydrophobic coating. The settling cylinder 9 is sleeved at the connection between the rotating shaft 10 and the extension shaft 11. When the rotating shaft 10 and the extension shaft 11 rotate at high speed, their surfaces rub against the air, forming a high-speed airflow barrier near the surfaces of the rotating shaft 10 and the extension shaft 11. When the coolant mist enters the interior of the settling cylinder 9, it is swept up by the high-speed airflow and thrown onto the inner wall of the settling cylinder 9. Due to the certain gap between the high-speed rotating airflow and the inner wall of the settling cylinder 9, the settling cylinder 9 has an angle with the horizontal plane, wherein the angle between the settling cylinder 9 and the horizontal plane is 35°. The coolant mist condenses on the flow of the inner wall of the settling cylinder 9, and the coolant is discharged through the end of the settling cylinder 9 into the interior of the main body 1.

[0024] In this invention, the major axis of the ellipse on the inner wall of the elliptical cylinder 8 is 34mm-36mm, wherein the major axis of the ellipse on the inner wall of the elliptical cylinder 8 is 35mm, and the minor axis of the ellipse on the inner wall of the elliptical cylinder 8 is 29mm-31mm, wherein the minor axis of the ellipse on the inner wall of the elliptical cylinder 8 is 30mm. The elliptical cylinder 8 is sleeved around the rotating shaft 10. When the rotating shaft 10 rotates at high speed, its surface rubs against the air at high speed, causing the air near the surface of the rotating shaft 10 to flow at high speed, so that the airflow flows inside the elliptical cylinder 8, preventing the coolant mist from passing through the elliptical cylinder 8 and contacting the motor 7.

[0025] In this invention, as per the appendix to the specification... Figure 7As shown, the top of the rotating shaft 10 is the first surface 101, the left side of the rotating shaft 10 is the second surface 102, the right side of the rotating shaft 10 is the third surface 103, and the bottom of the rotating shaft 10 is the fourth surface 104. The distance between the third surface 103 of the rotating shaft 10 and the inner wall of the elliptical cylinder 8 is 14.5mm-15.5mm, of which the distance between the third surface 103 of the rotating shaft 10 and the inner wall of the elliptical cylinder 8 is 15mm. The distance between the fourth surface 104 of the rotating shaft 10 and the inner wall of the elliptical cylinder 8 is 6mm-7mm. The distance between the second surface 102 of the rotating shaft 10 and the inner wall of the elliptical cylinder 8 is 6mm-7mm, of which the distance between the second surface 102 of the rotating shaft 10 and the inner wall of the elliptical cylinder 8 is 6.5mm. The distance between the first surface 101 of the rotating shaft 10 and the inner wall of the elliptical cylinder 8 is 4.5mm-5mm. The distance between the first surface 101 of the rotating shaft 10 and the inner wall of the elliptical cylinder 8 is 5mm. The anti-liquid gasket 17 is annular, and the inner diameter of the anti-liquid gasket 17 is the same as the minor axis length of the elliptical cylinder 8. The center of the anti-liquid gasket 17 does not coincide with the symmetrical center of the elliptical cylinder 8. The offset distance is 4.5mm-5.5mm, of which the offset distance is 5mm. The distance between the inner side of the anti-liquid gasket 17 and the third surface 103 of the rotating shaft 10 is 4.5mm-5.5mm, of which the distance between the inner side of the anti-liquid gasket 17 and the third surface 103 of the rotating shaft 10 is 5mm. The anti-liquid gasket 17 blocks liquid mist and prevents coolant from entering the inner wall of the elliptical cylinder 8 from the inner wall of the drop cylinder 9. The position of the rotating shaft 10 in the elliptical cylinder 8 has been tested to prevent coolant mist from passing through the elliptical cylinder 8 and contacting the motor 7.

[0026] In this invention, the anti-liquid gasket 17 is located at the junction of the fall cylinder 9 and the elliptical cylinder 8. The thickness of the end of the fall cylinder 9 near the inner wall of the main body 1 is less than the thickness of the end of the fall cylinder 9 away from the inner wall of the main body 1. The angle between the inner wall of the fall cylinder 9 and the axial direction of the extension shaft 11 is 1°-2°, wherein the angle between the inner wall of the fall cylinder 9 and the axial direction of the extension shaft 11 is 1.5°, so that the vertical distance between the inner wall of the fall cylinder 9 and the surface of the extension shaft 11 is different, and the vertical distance between the inner wall of the fall cylinder 9 and the surface of the extension shaft 11 continuously decreases, so that the coolant mist rubs against the inner wall of the fall cylinder 9 when it flows with the airflow. As the distance decreases, the coolant mist gradually cools on the inner wall of the fall cylinder 9, and the coolant then flows along the inner wall of the fall cylinder 9. The fall cylinder 9 blocks the coolant mist from passing through the fall cylinder 9 by the gravity and potential energy difference of the coolant. The coolant flows on the inner wall of the fall cylinder 9 under the action of gravity, and the coolant is discharged from the end of the fall cylinder 9 back into the interior of the main body 1.

[0027] In this invention, the motor 7 is a high-speed variable frequency motor that can be purchased from the market or customized by a private individual. The rated speed is 3000r / min-6000r / min. A heat insulation pad is provided between the output end of the motor 7 and the outer wall of the elliptical cylinder 8 to prevent the motor 7 from being affected by heat and thus its service life. The motor 7 is detachably and fixedly connected to the side of the main body 1 via a flange.

[0028] During assembly: Install the anti-liquid gasket 17 onto the end of the elliptical cylinder 8 on the side of the main body 1; detachably fix the drop cylinder 9 to the inside of the main body 1 and ensure that the drop cylinder 9 and the elliptical cylinder 8 are precisely aligned; fix the extension shaft 11 to the rotating shaft 10 with three short bolts 15; sequentially fit the pressing plate 12 and the cutting saw blade 13 onto the end of the extension shaft 11 and lock them in place with long bolts 14; fix the motor 7 to the side of the main body 1 through the flange, so that the rotating shaft 10 and the extension shaft 11 can move through the elliptical cylinder 8 and the drop cylinder 9 without contacting the inner wall.

[0029] When adding coolant: inject coolant into the main body 1, control the coolant level, immerse the bottom of the cutting saw blade 13 in the coolant, and discharge excess coolant through the overflow port 19 to achieve a stable coolant level.

[0030] When starting the operation: connect the motor 7 to the power supply. The motor 7 drives the rotating shaft 10, the extension shaft 11, the pressing plate 12 and the cutting saw blade 13 to rotate at high speed. The rotating saw blade 13 stirs the coolant to form coolant mist, which fills the interior of the main body 1. The rotating shaft 10 and the extension shaft 11 rotate at high speed and their surfaces rub against the air to form a high-speed airflow barrier, which throws the coolant mist onto the inner wall of the drop cylinder 9.

[0031] When the coolant mist flows back: the drop cylinder 9 is at a 35° angle to the horizontal plane and the inner wall is treated with a hydrophobic coating. The liquefied coolant flows back to the main body 1 along the inner wall of the drop cylinder 9 under the action of gravity. The anti-liquid gasket 17 blocks a small amount of splashed coolant from entering the elliptical cylinder 8, thus completely blocking the coolant mist and preventing the motor 7 from contacting the coolant and causing leakage or short circuit.

[0032] When shutting down for maintenance: After the operation is completed, turn off the motor 7. After the cutting saw blade 13 stops rotating, drain the coolant inside the main body 1 through the drain channel 16. If the cutting saw blade 13 needs to be replaced, it can be disassembled by unscrewing the long bolt 14. If the drop cylinder 9 needs to be maintained, it can be directly disassembled from the inside of the main body 1. Assembly and maintenance are convenient.

[0033] In use, firstly, the motor 7 is connected to the power supply, and then the coolant is poured into the main body 1. The coolant level is moderate, and the bottom of the cutting saw blade 13 is immersed in the coolant. The motor 7 drives the rotating shaft 10, extension shaft 11, pressing plate 12, and cutting saw blade 13 to rotate at high speed. The rotating saw blade 13 agitates the coolant to form coolant mist, which fills the interior of the main body 1. The rotating shaft 10 and extension shaft 11 rotate at high speed, and their surfaces rub against the air, causing the air near their surfaces to flow at high speed. The coolant mist is thrown to the inner wall of the drop cylinder 9. Due to the inclination of the inner wall of the drop cylinder 9, the coolant flows back into the main body 1, hindering the flow of coolant mist inside the drop cylinder 9. At the same time, the anti-liquid gasket 17 is located between the elliptical cylinder 8 and the drop cylinder 9 to prevent the coolant from passing through the drop cylinder 9 and entering the interior of the elliptical cylinder 8. It can completely block the coolant mist at the end of the elliptical cylinder 8, giving the drop cylinder 9 excellent waterproof capability.

[0034] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A liquid cooling structure based on the drop pressure difference for a cutting machine, characterized in that: include: A potential difference mechanism that blocks liquid backflow by using gravity and potential energy difference; Main body (1), the main body (1) is mounted on the falling potential difference mechanism; The motor (7) is movably connected through the drop difference mechanism; Rotating shaft (10), which is rotatably disposed in motor (7), and the rotating shaft (10) is the power output end of motor (7); The drop difference mechanism includes: An elliptical cylinder (8) is integrally formed and fixedly disposed on the side of the main body (1) at one end; The falling cylinder (9) is detachably and fixedly installed on the inside of the main body (1), and the end of the falling cylinder (9) is connected to one end of the elliptical cylinder (8). Liquid-proof gasket (17) is attached to the side of the main body (1) and is located at one end of the elliptical cylinder (8).

2. The liquid cooling structure for a cutting machine based on the drop pressure difference according to claim 1, characterized in that, The main body (1) has multiple reinforcing ribs (2) integrally formed and fixed on its surface. The main body (1) has a support frame (3) fixedly installed on its top. The main body (1) has a pre-baffle (4) fixedly installed on its top. The main body (1) has a cutting table (6) detachably installed on its top. The cutting table (6) has scale lines (18) on its surface. The back opening of the main body (1) has an overflow port (19) and a drain port (20). The drain port (20) is located directly below the overflow port (19).

3. The drop-off liquid cooling structure of a cutting machine according to claim 2, wherein A support beam (5) is fixedly installed on the side of the top of the main body (1), and a drain channel (16) is provided on one side of the top of the main body (1). An extension shaft (11) is detachably and fixedly sleeved on one end of the rotating shaft (10).

4. The drop-off liquid cooling structure of a cutting machine according to claim 2, wherein One end of the extension shaft (11) is detachably fixed with a pressing plate (12), and one end of the extension shaft (11) is detachably fixed with a cutting saw blade (13). One end of the extension shaft (11) is threaded with a long bolt (14). The cutting saw blade (13) and the pressing plate (12) are detachably fixed at one end of the extension shaft (11) by the long bolt (14).

5. The drop-off liquid cooling structure of a cutting machine according to claim 2, wherein The other end of the extension shaft (11) is provided with a plurality of short bolts (15), the ends of which are inserted into a notch at one end of the rotating shaft (10), so that the extension shaft (11) is detachably and fixedly sleeved on one end of the rotating shaft (10) by means of the short bolts (15).

6. The drop-off liquid cooling structure of a cutting machine according to claim 2, wherein The rotating shaft (10) and the extending shaft (11) are movably inserted through the middle of the falling cylinder (9), and the falling cylinder (9) has an angle of 30°-40° with the horizontal plane.

7. The drop-off liquid cooling structure of a cutting machine according to claim 2, wherein The major axis of the ellipse on the inner wall of the ellipse tube (8) is 34mm-36mm, and the minor axis of the ellipse on the inner wall of the ellipse tube (8) is 29mm-31mm.

8. The liquid cooling structure for a cutting machine based on the drop pressure difference according to claim 2, characterized in that, The top of the rotating shaft (10) is the first surface (101), the left side of the rotating shaft (10) is the second surface (102), the right side of the rotating shaft (10) is the third surface (103), and the bottom of the rotating shaft (10) is the fourth surface (104). The distance between the third surface (103) of the rotating shaft (10) and the inner wall of the elliptical cylinder (8) is 14.5mm-15.5mm. The distance between the second surface (102) of the rotating shaft (10) and the inner wall of the elliptical cylinder (8) is 6mm-7mm. The distance between the first surface (101) of the rotating shaft (10) and the inner wall of the elliptical cylinder (8) is 4.5mm-5.5mm. The distance between the fourth surface (104) of the rotating shaft (10) and the inner wall of the elliptical cylinder (8) is 6mm-7mm.

9. The liquid cooling structure for a cutting machine based on the drop pressure difference according to claim 2, characterized in that, The liquid-proof gasket (17) is annular. The inner diameter of the liquid-proof gasket (17) is consistent with the minor axis length of the elliptical cylinder (8). The center of the liquid-proof gasket (17) does not coincide with the center of symmetry of the elliptical cylinder (8). The offset distance is 4.5mm-5.5mm.

10. The liquid cooling structure for a cutting machine based on the drop pressure difference according to claim 2, characterized in that, The thickness of the end of the fall cylinder (9) near the inner wall of the main body (1) is less than the thickness of the end of the fall cylinder (9) away from the inner wall of the main body (1). The angle between the inner wall of the fall cylinder (9) and the axial direction of the extension shaft (11) is 1°-2°. The anti-liquid gasket (17) is located at the joint of the fall cylinder (9) and the elliptical cylinder (8).

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