High-precision laser focusing lens edge grinding equipment

Abstract

The high-precision laser focusing lens edge grinding equipment comprises a machine base, a lens clamping and rotating mechanism, a lens grinding mechanism and a control box are arranged on the machine base, the lens grinding mechanism is arranged on the rear side of the lens clamping and rotating mechanism, the lens grinding mechanism comprises a sliding rail base, a rear shaft base and a grinding wheel base, and the sliding rail base is in sliding connection with the machine base; the lens clamping mechanism can transversely move left and right parallel to the axis of the lens clamping mechanism; the rear shaft seat is arranged on the sliding rail seat, the grinding wheel seat is rotationally connected to the rear shaft seat and can move back and forth towards or away from the sheet clamping and rotating mechanism, a grinding wheel shaft is arranged in the grinding wheel seat, and a grinding wheel shaft motor for driving the grinding wheel shaft is arranged on the machine seat; a first cam mechanism for driving the grinding wheel seat to move front and back and a second cam mechanism for driving the sliding rail seat to move left and right are arranged in the machine base, and a front-back fine tuning micrometer for adjusting the front-back moving amount of the grinding wheel seat, a left chamfering micrometer for adjusting the right moving amount of the sliding rail seat and a right chamfering micrometer for adjusting the left moving amount of the sliding rail seat are arranged on the machine base. One-time forming precision machining of the lens can be achieved, the manufacturing process is simple and reliable, and the production efficiency and the yield of products are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of lens production equipment, and in particular to a high-precision laser focusing lens edge grinding device. Background Art

[0002] The technology of LiDAR lens components still needs to be improved and enhanced, such as reducing the overall cost and opening up the market in other new fields. In the future, the market for LiDAR lens components needs to be expanded, especially as the development of driverless cars is gaining more and more attention, and there is no lack of support for technology development and application. At the same time, the popularity of household robots and the country's high attention to the environmental protection industry have also brought new vitality to the development of the LiDAR lens component industry.

[0003] The preparation of laser focusing lenses requires precision grinding by an edge grinder. The utility model patent CN203973328U discloses an edge grinder; it includes a frame, a grinding head frame, a wheel motor, a workpiece shaft, a speed regulating motor, a left-right moving cam of the grinding head frame, and a forward-backward moving cam of the grinding head frame. A grinding wheel is arranged in the grinding head frame, and the grinding wheel is mounted on a grinding wheel shaft. The grinding wheel shaft is connected to the grinding wheel motor and driven by the grinding wheel motor to rotate the grinding wheel shaft. The workpiece shaft is used to mount the workpiece to be polished. The speed regulating motor drives the workpiece shaft, the left-right moving cam of the grinding head frame, and the forward-backward moving cam of the grinding head frame to rotate; by setting the grinding wheel and the workpiece shaft, the grinding wheel is driven to rotate by the grinding wheel motor, and the workpiece shaft is driven to rotate by the speed regulating motor. When in use, the workpiece to be edged or chamfered is mounted on the workpiece shaft.

[0004] However, the grinding accuracy of the prior art edge grinding machines is not high and still needs to be further improved. Summary of the invention

[0005] In order to make up for the deficiencies in the prior art, the present invention provides a high-precision laser focusing lens edge grinding device, and the technical solution adopted is as follows:

[0006] A high-precision laser focusing lens edge grinding equipment comprises a machine base, on which a lens clamping and rotating mechanism, a lens grinding mechanism and a control box are provided, the lens grinding mechanism is arranged at the rear side of the lens clamping and rotating mechanism, the lens grinding mechanism comprises a slide rail seat, a rear axle seat and a grinding wheel seat, the slide rail seat is slidably connected to the machine base and can make left and right lateral movements parallel to the axis of the lens clamping mechanism; the rear axle seat is arranged on the slide rail seat, the grinding wheel seat is rotatably connected to the rear axle seat, and can make forward and backward movements toward or away from the lens clamping and rotating mechanism, a grindstone shaft is arranged in the grinding wheel seat, and a grindstone shaft motor for driving the grindstone shaft is arranged on the machine base; a first cam mechanism for driving the grinding wheel seat to move forward and backward and a second cam mechanism for driving the slide rail seat to move horizontally left and right are arranged in the machine base, and a front and rear fine-tuning micrometer for adjusting the forward and backward movement amount of the grinding wheel seat, a left chamfering micrometer for adjusting the right movement amount of the slide rail seat, and a right chamfering micrometer for adjusting the left movement amount of the slide rail seat are arranged on the machine base.

[0007] Furthermore, the first cam mechanism includes an eccentric cam and a lower pressure rod, the lower pressure rod is inserted into the grinding wheel seat from the top of the grinding wheel seat, the eccentric cam pushes the lower pressure rod to move the grinding wheel seat forward and backward, and a forward return spring is connected between the grinding wheel seat and the machine base.

[0008] Furthermore, the second cam mechanism includes a cylindrical cam and a slide rail connecting rod, the slide rail connecting rod is connected to the slide rail seat, the cylindrical cam pushes the slide rail connecting rod to move left and right, and a left and right lateral shifting return spring is provided between the slide rail seat and the machine base.

[0009] Furthermore, a cam motor is provided in the machine base, the eccentric cam and the cylindrical cam are connected by a camshaft, the cam motor drives the camshaft through a synchronous belt, the other end of the camshaft is connected to a gear wheel, a plurality of groups of sensing points are provided axially on the outer periphery of the gear wheel, sensors corresponding to the plurality of sensing points are provided on the machine base, and the sensors are connected to the control box.

[0010] Furthermore, the lens clamping and rotating mechanism includes a main shaft seat, on which are provided a coaxial left shaft sleeve, a right shaft sleeve, a left shaft sleeve moving adjustment handle, and a right shaft sleeve adjustment handle. The left shaft sleeve is provided with a left shaft, the right shaft sleeve is provided with a right shaft, and the main shaft seat is provided with left and right shaft motors and a transmission shaft. The left and right shaft motors are connected to the transmission shaft through a synchronous belt, and both ends of the transmission shaft are respectively connected to the left shaft and the right shaft through a gear set.

[0011] Furthermore, an H-value micrometer is provided on the right side of the grinding wheel seat, an auxiliary chamfer positioning block is connected to the right side of the right sleeve, and a measuring rod of the H-value micrometer faces the auxiliary chamfer positioning block.

[0012] Furthermore, the front and rear fine-tuning micrometer is arranged on the spindle seat, and the measuring rod of the front and rear fine-tuning micrometer is facing the front end of the grinding wheel seat; the spindle seat is provided with a through hole for the slide rail connecting rod to move left and right, the left chamfer micrometer is arranged on the right side of the spindle seat, and the measuring rod of the left chamfer micrometer is facing the slide rail connecting rod; the right chamfer micrometer is arranged on the right side of the slide rail seat, and the measuring rod of the right chamfer micrometer is facing the right side of the spindle seat.

[0013] Furthermore, a grindstone shaft sleeve is provided in the grinding wheel seat and is sleeved outside the grindstone shaft. One end of the grindstone shaft sleeve extends out of the grinding wheel seat and is fixedly connected to a grindstone shaft adjustment block. A grindstone shaft adjustment screw is connected between the grindstone shaft adjustment block and the grinding wheel seat.

[0014] Furthermore, a bottom pull spring screw is provided on the main shaft seat, and a bottom pull spring is connected between the bottom pull spring screw and the slide rail seat.

[0015] Furthermore, it also includes a cooling mechanism, which includes a coolant tank and a protective box. The protective box cover is located at the grinding part of the grinding mechanism. A nozzle is provided in the protective box. The coolant tank is connected to the nozzle via a delivery pump and a pipeline. A return pipeline is provided at the bottom of the protective box, and the return pipeline is connected to the coolant tank.

[0016] Compared with the prior art, the present invention has the following beneficial technical effects:

[0017] The present invention fixes and rotates the lens through a lens clamping and rotating mechanism, the first cam mechanism drives the grinding wheel seat to move back and forth, and the outer diameter grinding amount of the lens is precisely controlled by the front and rear fine-tuning micrometer; the second cam mechanism drives the grinding wheel seat to move left or right, and the left and right chamfering amounts of the lens are precisely controlled by the left chamfering micrometer and the right chamfering micrometer. The present invention can realize one-time molding and precision processing of the lens, the manufacturing process is simple and reliable, and the production efficiency and yield of the product are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The invention is a three-dimensional high-precision laser focusing lens edge grinding device Figure 1 .

[0019] Figure 2 The invention is a three-dimensional high-precision laser focusing lens edge grinding device Figure 2 .

[0020] Figure 3 It is a structural diagram of the present invention after the spindle seat is removed.

[0021] Figure 4 It is a structural diagram of the present invention without the spindle seat and the grinding wheel seat.

[0022] Among them: 1. Machine base; 2. Spindle seat; 3. Left shaft sleeve; 4. Left shaft sleeve adjustment handle; 5. Left shaft; 6. Right shaft sleeve; 7. Right shaft sleeve adjustment handle; 8. Right shaft; 9. Upper handle adjustment screw; 10. Lower handle adjustment screw; 11. Left and right shaft motors; 12. Transmission shaft; 13. Gear set; 14. Slide rail seat; 15. Rear shaft seat; 16. Grinding wheel seat; 17. Whetstone shaft; 18. Whetstone shaft motor; 19. Eccentric cam; 20. Down-pressure rod; 21. Forward return spring; 22. Down-pressure adjustment screw; 23. Spring screw; 24. Whetstone sleeve ; 25. Whetstone shaft adjustment block; 26. Whetstone shaft adjustment screw; 27. Cylindrical cam; 28. Slide rail connecting rod; 29. ​​Left and right lateral return spring; 30. Bottom pull spring screw; 31. Bottom pull spring; 32. Cam motor; 33. Camshaft; 34. Shift wheel; 35. Sensing point; 36. Sensor; 37. Control box; 38. H value micrometer; 39. Auxiliary chamfer positioning block; 40. Front and rear fine-tuning micrometer; 41. Left chamfer micrometer; 42. Right chamfer micrometer; 43. Slider; 44. Coolant tank; 45. Protective box; 46. Vent. DETAILED DESCRIPTION

[0023] Many specific details are described in the following description to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from the description, and those skilled in the art can make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0024] Example 1

[0025] like Figures 1 to 4 As shown, a high-precision laser focusing lens edge grinding device includes a machine base 1, on which a lens clamping and rotating mechanism, a lens grinding mechanism, a cooling mechanism and a control box are arranged. The lens clamping and rotating mechanism is arranged on the front side of the machine base 1, and is used to clamp and rotate the lens.

[0026] The lens clamping and rotating mechanism includes a main shaft seat 2. A left shaft sleeve 3 is slidably connected to the left side of the top of the main shaft seat 2, and a left shaft sleeve adjustment handle 4 is provided on the outside to control the left shaft sleeve 3 to move left and right. The left shaft sleeve adjustment handle 4 moves the left shaft sleeve through a gear rack mechanism. A left shaft 5 is provided inside the left shaft sleeve 3, and the left shaft 5 moves with the left shaft sleeve 3.

[0027] A right sleeve 6 is slidably connected to the inside of the right side of the top of the spindle seat 2, and a right sleeve adjustment handle 7 is provided on the outside to control the left and right movement of the right sleeve 6. The right sleeve 6 is coaxial with the left sleeve 3, and a right shaft 8 is provided in the right sleeve 6, and the right shaft 8 moves with the right sleeve 6.

[0028] The right sleeve adjustment handle 7 is a handle that can swing left and right, and it moves the right sleeve 6 through a gear rack mechanism. The spindle seat 2 is provided with an upper handle adjustment screw 9 and a lower handle adjustment screw 10 that abut against the side of the right sleeve adjustment handle 7, and are used to fix the right sleeve adjustment handle 7. By adjusting the distance between the left sleeve 3 and the right sleeve 6, the lens can be clamped between the left shaft 5 and the right shaft 8.

[0029] The spindle seat 2 is provided with left and right shaft motors 11 and a transmission shaft 12. The left and right shaft motors 11 are connected to the transmission shaft 12 through a synchronous belt. The transmission shaft 12 is arranged parallel to the left shaft 5 and the right shaft 8, and the two ends are connected to the left shaft 5 and the right shaft 8 through a gear set 13, so as to realize the synchronous rotation of the left shaft 5 and the right shaft 8.

[0030] The lens grinding mechanism is arranged at the rear side of the lens clamping and rotating mechanism, and is used to grind the lens clamped on the lens clamping and rotating mechanism. The lens grinding mechanism includes a slide rail seat 14, a rear axle seat 15 and a grinding wheel seat 16. The slide rail seat 14 is slidably connected to the rear side of the spindle seat 2, and can perform left and right lateral movement parallel to the axis of the lens clamping mechanism. It should be noted that a fixed portion can also be protrudingly provided on the machine base, and the slide rail seat is slidably connected to the fixed portion on the machine base; when the spindle seat and the machine base are integrally formed, the spindle seat can also be a part of the machine base.

[0031] The rear axle seat 15 is arranged on the slide rail seat 14, and the grinding wheel seat 16 is rotatably connected to the rear axle seat 15, and can move forward and backward toward or away from the lens clamping and rotating mechanism. A grindstone shaft 17 is arranged in the grinding wheel seat 16, and a grindstone grinding wheel is installed on the grindstone shaft 17. A grindstone shaft motor 18 for driving the grindstone shaft 17 to rotate is arranged on the machine base 1. By controlling the forward and backward movement of the grinding wheel seat 16, the grindstone grinding wheel can be brought close to the lens to grind it, or moved away from the lens after grinding the lens.

[0032] The machine base 1 is provided with a first cam mechanism for driving the grinding wheel seat 16 to move forward and backward, and a second cam mechanism for driving the slide rail seat 14 to move horizontally left and right. The first cam mechanism includes an eccentric cam 19 and a lower pressure rod 20. The lower pressure rod 20 is obliquely inserted into the grinding wheel seat 16 from the top of the grinding wheel seat 16. The eccentric cam 19 pushes the lower pressure rod 20 through its peripheral curved surface to move the grinding wheel seat 16 forward and backward. A forward return spring 21 is connected between the grinding wheel seat 16 and the rear side of the spindle seat 2. The forward return spring 21 can provide a restoring force for the grinding wheel seat 16 to move forward.

[0033] A lower pressure adjustment screw 22 connected to the lower pressure rod 20 is provided at the top of the rear side of the grinding wheel seat 16, which can adjust the length of the lower pressure rod 20 extending into the grinding wheel seat 16, thereby adjusting the forward and backward movement range of the grinding wheel seat 16. A spring screw 23 connected to the forward return spring 21 is provided at the top of the rear side of the grinding wheel seat 16, which can adjust the tension of the forward return spring 21, thereby realizing the adjustment of the forward cutting force of the grinding wheel.

[0034] A grinding wheel seat 16 is slidably connected with a grinding wheel sleeve 24 sleeved on the outside of the grinding wheel shaft 17, and the grinding wheel shaft 17 moves with the grinding wheel sleeve. One end of the grinding wheel sleeve 24 away from the grinding wheel extends out of the grinding wheel seat 16 and is fixedly connected to a grinding wheel shaft adjustment block 25, and a grinding wheel shaft adjustment screw 26 is connected between the grinding wheel shaft adjustment block 25 and the grinding wheel seat 16. By adjusting the grinding wheel shaft adjustment screw 26, the grinding wheel sleeve 24 can be moved left and right, thereby moving the grinding wheel shaft 17 left and right.

[0035] The second cam mechanism includes a cylindrical cam 27 and a slide rail connecting rod 28. The slide rail connecting rod 28 is connected to the slide rail seat 14. The spindle seat 2 is provided with a through hole for the slide rail connecting rod 28 to move left and right. The cylindrical cam 27 pushes the slide rail connecting rod 28 to move left and right in the through hole through the curved surface of its side, thereby driving the pulley seat 13 to move left and right (i.e., the grinding wheel seat to move left and right). A left and right lateral return spring 29 is provided between the middle of the side of the slide rail seat 14 close to the grinding wheel and the rear side of the spindle seat 2.

[0036] A bottom pull spring screw 30 is provided at the bottom of the rear side of the spindle seat 2, and a bottom pull spring 31 is connected between the bottom pull spring screw 30 and the bottom of the slide rail seat 14. The left and right lateral return spring 29 and the bottom pull spring 31 provide tension and pulling force respectively, so that the pulley seat 13 can be reset in time after moving left and right. By adjusting the bottom pull spring screw 30, the elastic force of the bottom pull spring 31 can be adjusted, thereby realizing the adjustment of the left and right cutting force of the grinding wheel.

[0037] A cam motor 32 is provided in the machine base 1, and the eccentric cam 19 and the cylindrical cam 27 are connected through a camshaft 33. The cam motor 32 drives the camshaft 33 to rotate through a synchronous belt. A gear wheel 34 is connected to the other end of the camshaft 33. A plurality of groups of sensing points 35 are provided along the axial direction on the outer periphery of the gear wheel 34. A sensor 36 corresponding to the plurality of groups of sensing points 35 is provided on the machine base 1, and the sensor 36 is connected to a control box 37. By identifying different sensing points 35 through the sensor 36, the camshaft 33 can be controlled to rotate to a certain angle, thereby realizing the control of the rotation angle of the eccentric cam 19 and the cylindrical cam 27, and then realizing the control of the moving direction of the grinding wheel seat 16.

[0038] An H value micrometer 38 is provided on the right side of the grinding wheel seat 16, an auxiliary chamfer positioning block 39 is connected to the right side of the right sleeve 6, and the measuring rod of the H value micrometer 38 faces the auxiliary chamfer positioning block 39. The machine base 1 is provided with a front and rear fine-tuning micrometer 40 for adjusting the front and rear movement amount of the grinding wheel seat 16, a left chamfer micrometer 41 for adjusting the right movement amount of the slide rail seat 14, and a right chamfer micrometer 42 for adjusting the left movement amount of the slide rail seat 14.

[0039] Specifically, the front and rear fine-tuning micrometer 40 is arranged on the spindle seat 2, and the measuring rod of the front and rear fine-tuning micrometer 40 faces the front end of the grinding wheel seat 16, which limits the forward movement of the grinding wheel seat 16, thereby controlling the outer diameter of the lens to be polished. The left chamfer micrometer 41 is arranged on the right side of the spindle seat 2, and a slider 43 is connected to the slide rail connecting rod 28. The measuring rod of the left chamfer micrometer 41 faces the slider 43, which limits the right movement of the slide rail connecting rod 28 (that is, limits the right movement of the grinding wheel seat), thereby realizing the control of the left chamfer amount of the lens. The right chamfer micrometer 42 is arranged on the right side of the slide rail seat 14, and the measuring rod of the right chamfer micrometer 42 faces the right side surface of the spindle seat 2, which limits the left movement of the slide rail seat 14 (that is, limits the left movement of the grinding wheel seat), thereby realizing the control of the right chamfer amount of the lens.

[0040] The cooling mechanism is used to cool the grinding wheel in operation, and includes a coolant tank 44 and a protective box 45. The protective box 45 is covered at the grinding part of the grinding mechanism (i.e., it covers the grinding wheel), and a nozzle is provided in the protective box 45. The coolant tank 44 is connected to the nozzle through a delivery pump and a pipeline, and the coolant is sprayed to the grinding wheel through the nozzle. A return pipeline is provided at the bottom of the protective box 45, and the return pipeline is connected to the coolant tank 44. A vent 46 is provided at the rear side of the protective box 45.

[0041] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to replace some of the technical features therein with equivalents. However, any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-precision laser focusing lens edge grinding device, characterized by: The invention comprises a machine base, on which a lens clamping and rotating mechanism, a lens grinding mechanism and a control box are provided, the lens grinding mechanism is arranged at the rear side of the lens clamping and rotating mechanism, the lens grinding mechanism comprises a slide rail seat, a rear axle seat and a grinding wheel seat, the slide rail seat is slidably connected to the machine base, and can make left and right lateral movement parallel to the axis of the lens clamping mechanism; the rear axle seat is arranged on the slide rail seat, the grinding wheel seat is rotatably connected to the rear axle seat, and can make forward and backward movement toward or away from the lens clamping and rotating mechanism, a grindstone shaft is arranged in the grinding wheel seat, and a grindstone shaft motor for driving the grindstone shaft is arranged on the machine base; a first cam mechanism for driving the grinding wheel seat to move forward and backward, and a second cam mechanism for driving the slide rail seat to move left and right are arranged in the machine base, and a front and rear fine-tuning micrometer for adjusting the forward and backward movement amount of the grinding wheel seat, a left chamfering micrometer for adjusting the right movement amount of the slide rail seat, and a right chamfering micrometer for adjusting the left movement amount of the slide rail seat are arranged on the machine base.

2. The high-precision laser focusing lens edge grinding equipment according to claim 1, characterized in that: The first cam mechanism includes an eccentric cam and a lower pressure rod, the lower pressure rod is inserted into the grinding wheel seat from the top of the grinding wheel seat, the eccentric cam pushes the lower pressure rod to move the grinding wheel seat forward and backward, and a forward return spring is connected between the grinding wheel seat and the machine base.

3. The high-precision laser focusing lens edge grinding equipment according to claim 2, characterized in that: The second cam mechanism comprises a cylindrical cam and a slide rail connecting rod, the slide rail connecting rod is connected to the slide rail seat, the cylindrical cam pushes the slide rail connecting rod to move left and right, and a left and right lateral shifting return spring is provided between the slide rail seat and the machine base.

4. The high-precision laser focusing lens edge grinding equipment according to claim 3, characterized in that: A cam motor is provided in the machine base, the eccentric cam and the cylindrical cam are connected via a camshaft, the cam motor drives the camshaft via a synchronous belt, a gear wheel is connected to the other end of the camshaft, a plurality of groups of sensing points are axially provided on the outer periphery of the gear wheel, sensors corresponding to the plurality of sensing points are provided on the machine base, and the sensors are connected to the control box.

5. The high-precision laser focusing lens edge grinding equipment according to claim 4, characterized in that: The lens clamping and rotating mechanism includes a main shaft seat, on which are provided a coaxial left shaft sleeve, a right shaft sleeve, a left shaft sleeve moving adjustment handle, and a right shaft sleeve adjustment handle. A left shaft is arranged in the left shaft sleeve, and a right shaft is arranged in the right shaft sleeve. The main shaft seat is provided with left and right shaft motors and a transmission shaft. The left and right shaft motors are connected to the transmission shaft through a synchronous belt, and both ends of the transmission shaft are connected to the left shaft and the right shaft respectively through a gear set.

6. The high-precision laser focusing lens edge grinding equipment according to claim 5, characterized in that: An H-value micrometer is arranged on the right side of the grinding wheel seat, an auxiliary chamfer positioning block is connected to the right side of the right sleeve, and a measuring rod of the H-value micrometer faces the auxiliary chamfer positioning block.

7. The high-precision laser focusing lens edge grinding device according to claim 6, characterized in that: The front and rear fine-tuning micrometer is arranged on the spindle seat, and the measuring rod of the front and rear fine-tuning micrometer faces the front end of the grinding wheel seat; the spindle seat is provided with a through hole for the slide rail connecting rod to move left and right, the left chamfer micrometer is arranged on the right side of the spindle seat, and the measuring rod of the left chamfer micrometer faces the slide rail connecting rod; the right chamfer micrometer is arranged on the right side of the slide rail seat, and the measuring rod of the right chamfer micrometer faces the right side surface of the spindle seat.

8. The high-precision laser focusing lens edge grinding equipment according to claim 7, characterized in that: The grinding wheel seat is provided with a grindstone shaft sleeve sleeved outside the grindstone shaft, one end of the grindstone shaft sleeve extends out of the grinding wheel seat and is fixedly connected to a grindstone shaft adjustment block, and a grindstone shaft adjustment screw is connected between the grindstone shaft adjustment block and the grinding wheel seat.

9. The high-precision laser focusing lens edge grinding device according to claim 8, characterized in that: A bottom pull spring screw is arranged on the main shaft seat, and a bottom pull spring is connected between the bottom pull spring screw and the slide rail seat.

10. The high-precision laser focusing lens edge grinding device according to claim 9, characterized in that: It also includes a cooling mechanism, which includes a coolant tank and a protective box. The protective box cover is located at the grinding part of the grinding mechanism. A nozzle is provided in the protective box. The coolant tank is connected to the nozzle via a delivery pump and a pipeline. A return pipeline is provided at the bottom of the protective box, and the return pipeline is connected to the coolant tank.

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