A CNC machine tool with good protective door locking effect and high safety

Abstract

The present invention relates to a CNC machine tool with good locking effect of a protective door and high safety, comprising a main body, a protective door, a locking mechanism and a protective mechanism, wherein the locking mechanism and the protective mechanism are arranged on the protective door, the locking mechanism comprises two locking components, the locking component comprises a locking block, a fixing block, a pushing unit and a locking unit, the protective mechanism comprises a barrier component and a trigger component, and a self-starting mechanism is provided on the locking mechanism. The CNC machine tool with good locking effect of the protective door performs multiple locking on the protective door through a magnet, a pushing unit and a locking unit to achieve a better locking effect of the protective door, and fills the gap at the locking block through a first spring and a second spring to avoid micro-movement of the protective door caused by shaking, better avoids waste or workpiece splashing, and improves safety, blocks and closes the observation port through the barrier mechanism, thereby better avoiding workpiece flying out, and improves safety, realizes automatic operation of the locking mechanism through the self-starting mechanism, reduces manual operation, and improves practicality.

Description

Technical Field

[0001] The invention belongs to the technical field of numerically controlled machine tools, and in particular relates to a numerically controlled machine tool with a protective door having a good locking effect and high safety. Background Art

[0002] CNC machine tool is the abbreviation of digitally controlled machine tool. It is an automated machine tool equipped with a program control system. The control system can logically process programs specified by control codes or other symbolic instructions, decode them, and express them in coded numbers. The information is input into the CNC device through an information carrier. After calculation and processing, the CNC device sends various control signals to control the movement of the machine tool and automatically process parts according to the shape and size required by the drawing. It is a flexible and high-efficiency automated machine tool.

[0003] When existing CNC machine tools are processing workpieces, they are generally protected by providing protective doors. However, existing protective doors are generally not provided with a good locking mechanism. The vibration generated when the device is running will cause the protective door to vibrate open, thereby affecting the protection effect. Therefore, a latch-type locking mechanism is generally provided on the protective door to prevent the protective door from opening by mistake. When the latch-type locking mechanism is in use, there is a gap between the latches. The vibration will still cause the latch to shake, causing the protective door to move, which may cause a gap between the protective door and the operating room, causing waste to splash, thereby causing harm to external operators. At the same time, in order to observe the processing status of the workpiece, a glass cover is usually provided on the protective door. When the device is misoperated, the workpiece may fly out and the workpiece may penetrate the glass cover, thereby causing harm to external operators, and the safety is not high. Summary of the Invention

[0004] In order to overcome the shortcomings of the existing technology, the purpose of the present invention is to provide a CNC machine tool with good protective door locking effect and high safety, aiming to solve the problem that the protective doors of conventional CNC machine tools in the prior art do not have a reliable locking mechanism, which will cause vibration during the operation of the machine tool and cause the protective door to vibrate open.

[0005] The present invention is achieved by adopting the following technical solutions:

[0006] The technical solution adopted by the present invention to solve the technical problem is: a CNC machine tool with good locking effect of a protective door and high safety, comprising a main body, a protective door, a locking mechanism and a protective mechanism, wherein the protective door is installed on the main body, and the locking mechanism and the protective mechanism are arranged on the protective door;

[0007] The locking mechanism comprises two locking assemblies, wherein the two locking assemblies are respectively arranged on both sides of the protective door, the locking assembly comprises a lock block, a fixed block, a pushing unit and a locking unit, the lock block is arranged on the protective door, the fixed block is arranged on the main body, the fixed block is provided with a groove, the lock block extends into the groove, the pushing unit comprises a pushing block and a first spring, the pushing block is arranged in the groove, the pushing block is slidably connected with the groove, the pushing block abuts against the lock block, the first spring is arranged in the groove, one end of the first spring is connected with the groove, and the other end of the first spring is connected to the pushing block, the locking unit has two, the two locking units are respectively arranged on both sides of the lock block, the locking unit comprises a moving block, a locking rod and a second spring, the locking rod passes through the fixed block and extends into the groove, the lock block is provided with a lock groove, one end of the lock rod located in the groove extends into the lock groove, the lock rod abuts against the lock groove, the moving block is arranged at one end of the lock rod away from the lock block, the second spring is sleeved on the lock rod, one end of the second spring is connected to the moving block, and the other end of the second spring is connected to the fixed block;

[0008] The protection mechanism includes a barrier assembly and a trigger assembly, the protection door is provided with an observation port, the observation port is provided with a glass cover, the trigger assembly is arranged on the glass cover, and the barrier assembly is arranged below the glass cover;

[0009] The barrier assembly includes a fixed frame, a baffle, and a third spring. The fixed frame is provided on the protective door and is located directly below the glass cover. The baffle is provided in the fixed frame and is slidably connected to the fixed frame. The third spring is provided in the fixed frame, one end of the third spring is connected to the fixed frame, and the other end of the third spring is connected to the baffle.

[0010] The trigger assembly includes an airbag and a trigger unit. The airbag is arranged on the glass cover. There are two trigger units, which are respectively arranged on both sides of the fixed frame. The trigger unit includes a sleeve, a piston rod and a fourth spring. The sleeve is arranged on the fixed frame. One end of the piston rod is located in the sleeve, and the other end of the piston rod extends out of the sleeve. The end of the piston rod located outside the sleeve abuts against the end of the baffle away from the third spring. The fourth spring is arranged in the sleeve, one end of the fourth spring is connected to the piston of the piston rod, and the other end of the fourth spring is connected to the sleeve. The sleeve is connected to the interior of the airbag through the trachea.

[0011] Preferably, the locking mechanism is provided with a self-starting mechanism, and the self-starting mechanism includes an adsorption assembly, a transmission assembly and a pulling assembly, and the adsorption assembly includes magnet 1, magnet 2, a limit rod, a limit block and a fifth spring, the limit rod is arranged on the main body, the limit rod is provided with a limit groove, the limit block is located in the limit groove, the limit block is slidably connected to the limit groove, the fifth spring is arranged in the limit groove, one end of the fifth spring is connected to the limit groove, and the other end of the fifth spring is connected to the limit block, the magnets are two, magnet 1 is arranged on the protective door, and magnet 2 is arranged on the limit block, the two magnets are arranged opposite to each other, and the two magnets attract each other, a connecting rod is provided on the side of the protective door close to magnet 1, a slide is provided on the connecting rod, the magnet 1 is arranged in the slide, a positioning sleeve is provided on one side of the magnet 1, a positioning pin is provided in the positioning sleeve, and a positioning hole is provided in the slide, and the positioning pin can be inserted in the positioning hole, and the locking mechanism is transmission-connected to the adsorption assembly through the pulling assembly and the transmission assembly.

[0012] In order to facilitate startup, when the protective door needs to be opened, first pull the positioning pin out of the positioning hole, and then pull the positioning pin to drive magnet 1 to separate from magnet 2 connected to the limit block, so that the two magnets move away from each other, thereby reducing the suction force on magnet 2. At this time, the fifth spring is in a deformed state. When the pulling force of the fifth spring is greater than the suction force of magnet 2, the fifth spring will pull the limit block to move, the limit block drives the moving rod to move, the moving rod drives the belt to move, the belt drives the two wheels to rotate at the same time, the wheels drive the two wire drums to rotate at the same time, and the pull rope is wound on the wire drum. The wire drum drives the locking assembly to operate, realize the unlocking function, and then pull the handle, and the handle drives the protective door to move and open the door. Here, the restoring force of the fifth spring is greater than the restoring force of each second spring, so that the fifth spring can pull the belt to move, so that the locking rod remains in a state of being moved out of the lock slot. Here, through the suction force of the magnet, the protective door is better adsorbed and fixed, and the protective door is better prevented from being opened by mistake.

[0013] When the protective door is closed, magnet 1 on the protective door moves to above magnet 2 where the limit block is located, and the positioning pin is inserted into the positioning hole. At the same time, the two magnets approach each other, and the suction force sucks magnet 2 on the limit block upward, causing magnet 2 to move in the opposite direction, thereby causing the belt to move in the opposite direction, causing the turntable to rotate in the opposite direction, and the turntable drives the wire drum to rotate in the opposite direction to release the pull rope. At this time, the second spring is in a deformed state, and the restoring force of the second spring produces a reverse thrust on the moving block, which drives the locking rod to move in the opposite direction, so that the locking rod is stuck in the lock slot to achieve locking.

[0014] Here, the locking mechanism can be automatically opened and closed by switching the protective door, and the two locking components can be automatically opened at the same time, which reduces manual operation and saves manpower.

[0015] Preferably, there are two pulling assemblies, and the two pulling assemblies are respectively arranged corresponding to the two locking assemblies. The pulling assembly includes two pulling units, and the two pulling units are respectively arranged corresponding to the two locking rods of the same locking assembly. The pulling unit includes a pull rope and a wire drum. The wire drum is arranged on the side of the fixed block away from the locking block. One end of the pull rope is connected to the moving block, and the other end of the pull rope is connected to the wire drum. The pull rope is wound on the wire drum. The two wire drums of the same pulling assembly are coaxially arranged, and the two wire drums are transmission connected. The transmission assembly is arranged on the two pulling assemblies.

[0016] Preferably, the transmission assembly includes a belt, a rotating wheel and a movable rod. There are two rotating wheels, which are respectively arranged corresponding to the two pulling assemblies. The rotating wheel is coaxially arranged with the wire drum, and the rotating wheel is connected to the wire drum through transmission. The belt is sleeved on the two rotating wheels, and the two rotating wheels are connected through belt transmission. The movable rod is arranged on the belt, and the movable rod is connected to the limit block.

[0017] Preferably, a positioning wheel is provided on a side of the moving block away from the locking rod, and the pull rope passes around the positioning wheel.

[0018] Preferably, the protective door is provided with a handle.

[0019] Beneficial effects of the present invention:

[0020] The CNC machine tool with good protective door locking effect and high safety has multiple locking of the protective door by means of a magnet, a pushing unit and a locking unit, thereby achieving a better protective door locking effect, and the gap at the locking block is filled by means of the first spring and the second spring, thereby avoiding micro-movement of the protective door caused by shaking, and better avoiding splashing of waste materials or workpieces, thereby improving safety, and the observation port is blocked and closed by the barrier mechanism, thereby better avoiding flying out of the workpiece, thereby improving safety, and the automatic operation of the locking mechanism is achieved by the self-starting mechanism, thereby reducing manual operation and improving practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a CNC machine tool with good locking effect of a protective door and high safety of the present invention;

[0022] Figure 2 It is a schematic diagram of the connection structure of the locking mechanism and the self-starting mechanism of the CNC machine tool with good locking effect and high safety of the protective door of the present invention;

[0023] Figure 3 It is a schematic diagram of the connection structure of the locking assembly and the pulling assembly of the CNC machine tool with good locking effect and high safety of the protective door of the present invention;

[0024] Figure 4It is a structural diagram of a protective mechanism for a CNC machine tool with good locking effect of a protective door and high safety of the present invention;

[0025] Figure 5 yes Figure 4 A magnified view of part A;

[0026] Figure 6 yes Figure 2 Bottom view of the middle link.

[0027] The accompanying drawings are marked as: main body 1, protective door 2, locking block 3, fixed block 4, push block 5, first spring 6, moving block 7, locking rod 8, second spring 9, glass cover 10, fixed frame 11, baffle 12, third spring 13, airbag 14, sleeve 15, piston rod 16, fourth spring 17, magnet 1 18, limit rod 19, limit block 20, fifth spring 21, pull rope 22, wire drum 23, belt 24, pulley 25, moving rod 26, connecting rod 27, positioning sleeve 28, positioning pin 29, slide 30, positioning hole 31, magnet 2 32. DETAILED DESCRIPTION

[0028] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0029] like Figure 1 As shown, a CNC machine tool with a good protective door locking effect and high safety includes a main body 1, a protective door 2, a locking mechanism and a protective mechanism. The protective door 2 is installed on the main body 1, and the locking mechanism and the protective mechanism are arranged on the protective door 2;

[0030] like Figure 2-3 , Figure 6As shown, the locking mechanism includes two locking components, which are respectively arranged on both sides of the protective door 2. The locking component includes a lock block 3, a fixed block 4, a pushing unit and a locking unit. The lock block 3 is arranged on the protective door 2, and the fixed block 4 is arranged on the main body 1. The fixed block 4 is provided with a groove, and the lock block 3 extends into the groove. The pushing unit includes a push block 5 and a first spring 6. The push block 5 is arranged in the groove, and the push block 5 is slidably connected to the groove. The push block 5 abuts against the lock block 3. The first spring 6 is arranged in the groove, and one end of the first spring 6 is connected to the groove. The other end of the first spring 6 is connected to the push block 5. There are two locking units, which are respectively arranged on both sides of the lock block 3. The locking unit includes a moving block 7, a locking rod 8 and a second spring 9. The locking rod 8 passes through the fixed block 4 and extends into the groove. The lock block 3 is provided with a lock groove. The end of the locking rod 8 located in the groove extends into the lock groove. The lock rod 8 abuts against the lock groove. The moving block 7 is provided at the end of the locking rod 8 away from the lock block 3. The second spring 9 is sleeved on the lock rod 8. One end of the second spring 9 is connected to the moving block 7, and the other end of the second spring 9 is connected to the fixed block 4.

[0031] When the cam 1 is unlocked, the locking block 3 is locked, and the locking block 3 is locked. At the same time, the locking block 3 is unlocked, and the locking block 3 is locked. At the same time, the locking block 3 is unlocked, and the locking block 3 is locked.

[0032] Compared with the latch-type locking device, when the latch is locked, a gap is left between the latch and the socket, and they cannot be fully fitted together. Therefore, when the protective door 2 vibrates, the remaining gap will allow the protective door 2 to have space to move, which may make the operating room on the main body 1 not fully closed, causing iron chips to splash and cause harm to external operators. This mechanism uses the second spring 9 to make the locking rod 8 fit closely to the lock groove, and at the same time uses the first spring 6 to make the push block 5 and the locking rod 8 fit closely to the lock block 3, thereby avoiding the generation of gaps, making the protective door 2 unable to move, and thus achieving better locking protection effect.

[0033] like Figure 4-5As shown, the protection mechanism includes a barrier assembly and a trigger assembly. The protection door 2 is provided with an observation port, the observation port is provided with a glass cover 10, the trigger assembly is provided on the glass cover 10, and the barrier assembly is provided below the glass cover 10;

[0034] Here, the internal workpiece is observed during processing through the observation port, and the observation port is sealed and protected by the glass cover 10.

[0035] Here, the airbag 14 covers the glass cover 10. When the glass cover 10 is penetrated, the workpiece will collide with the airbag 14, and the airbag 14 will also block the workpiece, thereby preventing the workpiece from flying out again, thereby improving safety. Here, the airbag 14 is made of transparent material, thereby preventing the airbag 14 from affecting observation, and when the airbag 14 collides with the workpiece, the airbag 14 is penetrated, causing the air in the airbag 14 to leak, thereby causing the air in the sleeve 15 to flow out through the trachea. At this time, the fourth spring 17 is in a deformed state, and the restoring force of the fourth spring 17 produces a reverse pulling force on the piston rod 16, thereby causing the piston rod 16 to move in the opposite direction, thereby making the baffle 12 unobstructed. At this time, the third spring 13 is in a deformed state, and the restoring force of the third spring 13 produces a thrust on the baffle 12, thereby causing the baffle 12 to be quickly pushed out to block the observation port, thereby isolating the splashing space, thereby better improving safety.

[0036] like Figure 4-5 As shown, the barrier assembly includes a fixed frame 11, a baffle 12 and a third spring 13. The fixed frame 11 is set on the protective door 2 and is located directly below the glass cover 10. The baffle 12 is set in the fixed frame 11 and is slidably connected to the fixed frame 11. The third spring 13 is set in the fixed frame 11, one end of the third spring 13 is connected to the fixed frame 11, and the other end of the third spring 13 is connected to the baffle 12.

[0037] like Figure 4-5 As shown, the trigger assembly includes an airbag 14 and a trigger unit. The airbag 14 is arranged on the glass cover 10. There are two trigger units, which are respectively arranged on both sides of the fixed frame 11. The trigger unit includes a sleeve 15, a piston rod 16 and a fourth spring 17. The sleeve 15 is arranged on the fixed frame 11. One end of the piston rod 16 is located in the sleeve 15, and the other end of the piston rod 16 extends out of the sleeve 15. The end of the piston rod 16 located outside the sleeve 15 abuts against the end of the baffle 12 away from the third spring 13. The fourth spring 17 is arranged in the sleeve 15, one end of the fourth spring 17 is connected to the piston of the piston rod 16, and the other end of the fourth spring 17 is connected to the sleeve 15. The sleeve 15 is connected to the interior of the airbag 14 through the trachea.

[0038] like Figure 2 As shown, preferably, the locking mechanism is provided with a self-starting mechanism, which includes an adsorption assembly, a transmission assembly and a pulling assembly. The adsorption assembly includes magnet 1 18, magnet 2 32, a limit rod 19, a limit block 20 and a fifth spring 21. The limit rod 19 is provided on the main body 1, and a limit groove is provided on the limit rod 19. The limit block 20 is located in the limit groove, and the limit block 20 is slidably connected to the limit groove. The fifth spring 21 is provided in the limit groove, one end of the fifth spring 21 is connected to the limit groove, and the other end of the fifth spring 21 is connected to the limit block 20. There are two magnets, magnet 18 is slidably set on the protective door 2, and magnet 2 32 is set on the limit block 20. The two magnets are set opposite to each other and attract each other. A connecting rod 27 is set on the side of the protective door 2 close to magnet 18, and a slide 30 is set on the connecting rod 27. Magnet 18 is set in the slide 30, and a positioning sleeve 28 is set on one side of magnet 18. A positioning pin 29 is set in the positioning sleeve 28, and a positioning hole 31 is set in the slide 30. The positioning pin 29 can be inserted in the positioning hole 31, and the locking mechanism is connected to the adsorption assembly through a pulling assembly and a transmission assembly.

[0039] For easy starting, when the protective door 2 needs to be opened, first pull the positioning pin 29 out of the positioning hole 31, and then pull the positioning pin 29 to drive magnet 18 to separate from magnet 2 32 connected to the limit block 20, so that the suction force on magnet 2 32 is reduced. At this time, the fifth spring 21 is in a deformed state. When the pulling force of the fifth spring 21 is greater than the suction force of magnet 2 32, the fifth spring 21 will pull the limit block 20 to move, and the limit block 20 drives the moving rod 26 to move, and the moving rod 26 drives the belt 24 to move. The belt 24 drives the two wheels 25 to rotate at the same time, and the wheel 25 drives the two wire drums 23 to rotate at the same time, winding the pull rope 22 around the wire drum 23, and the wire drum 23 drives the locking assembly to operate, realizing the unlocking function, and then pull the handle, and the handle drives the protective door 2 to move and open the door. Here, the restoring force of the fifth spring 21 is greater than the restoring force of each second spring 9, so that the fifth spring 21 can pull the belt 24 to move, so that the locking rod 8 remains in a state of being moved out of the lock slot. Here, the suction force of the magnet is used to better adsorb and fix the protective door 2, and better prevent the protective door 2 from being opened accidentally.

[0040] When the protective door 2 is closed, the magnet 18 on the protective door 2 moves to above the magnet 2 32 where the limit block 20 is located, and the positioning pin is inserted into the positioning hole. At the same time, the two magnets approach each other, and the suction force sucks the magnet 2 32 on the limit block 20 upward, causing the magnet 2 32 to move in the opposite direction, thereby causing the belt 24 to move in the opposite direction, causing the wheel 25 to rotate in the opposite direction, and the wheel 25 drives the wire drum 23 to rotate in the opposite direction to release the pull rope 22. At this time, the second spring 9 is in a deformed state, and the restoring force of the second spring 9 produces a reverse thrust on the moving block 7. The moving block 7 drives the locking rod 8 to move in the opposite direction, so that the locking rod 8 is stuck in the lock slot to achieve locking.

[0041] Here, the automatic opening and closing of the locking mechanism can be achieved by switching the protective door 2, and the self-opening of the two locking components can be achieved at the same time, which reduces manual operation and saves manpower.

[0042] like Figure 2 As shown, preferably, there are two pulling assemblies, and the two pulling assemblies are respectively arranged corresponding to the two locking assemblies. The pulling assembly includes two pulling units, and the two pulling units are respectively arranged corresponding to the two locking rods 8 of the same locking assembly. The pulling unit includes a pull rope 22 and a wire drum 23. The wire drum 23 is arranged on the side of the fixed block 4 away from the locking block 3. One end of the pull rope 22 is connected to the moving block 7, and the other end of the pull rope 22 is connected to the wire drum 23. The pull rope 22 is wound on the wire drum 23. The two wire drums 23 of the same pulling assembly are coaxially arranged, and the two wire drums 23 are connected for transmission. The transmission assembly is arranged on the two pulling assemblies.

[0043] like Figure 2 As shown, preferably, the transmission assembly includes a belt 24, a pulley 25 and a moving rod 26. There are two pulleys 25, and the two pulleys 25 are respectively arranged corresponding to the two pulling assemblies. The pulley 25 is coaxially arranged with the wire drum 23, and the pulley 25 is connected to the wire drum 23 by transmission. The belt 24 is sleeved on the two pulleys 25, and the two pulleys 25 are connected by transmission through the belt 24. The moving rod 26 is arranged on the belt 24, and the moving rod 26 is connected to the limit block 20.

[0044] Preferably, a positioning wheel is provided on the side of the moving block 7 away from the locking rod 8, and the pull rope 22 passes around the positioning wheel.

[0045] Preferably, the protective door 2 is provided with a handle.

[0046] Compared with the existing technology, the CNC machine tool with good protective door locking effect and high safety has multiple locking of the protective door 2 through the magnet, the pushing unit and the locking unit to achieve a better locking effect of the protective door 2, and the first spring 6 and the second spring 9 fill the gap at the lock block 3 to avoid micro-movement of the protective door 2 caused by shaking, better avoid waste or workpiece splashing, and improve safety. The observation port is blocked and closed by the isolation mechanism, so as to better avoid the workpiece flying out and improve safety. The automatic operation of the locking mechanism is realized by the self-starting mechanism, which reduces manual operation and improves practicality.

[0047] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions based on the principles of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, various improvements and modifications that do not depart from the principles of the present invention should be considered within the scope of protection of the present invention.

Claims

1. A CNC machine tool with good locking effect of protective door and high safety, characterized in that: It includes a main body, a protective door, a locking mechanism and a protective mechanism, wherein the protective door is installed on the main body, and the locking mechanism and the protective mechanism are arranged on the protective door; The locking mechanism comprises two locking assemblies, the two locking assemblies are respectively arranged on both sides of the protective door, the locking assembly comprises a lock block, a fixed block, a pushing unit and a locking unit, the lock block is arranged on the protective door, the fixed block is arranged on the main body, the fixed block is provided with a groove, the lock block extends into the groove, the pushing unit comprises a pushing block and a first spring, the pushing block is arranged in the groove, the pushing block is slidably connected with the groove, the pushing block abuts against the lock block, the first spring is arranged in the groove, one end of the first spring is connected with the groove, and the other end of the first spring is connected to the pushing block, the locking unit has two locking units, the two locking units are respectively arranged on both sides of the lock block, the locking unit comprises a moving block, a locking rod and a second spring, the locking rod passes through the fixed block and extends into the groove, a locking groove is provided on the lock block, one end of the locking rod located in the groove extends into the lock groove, the locking rod abuts against the lock groove, the moving block is arranged at one end of the lock rod away from the lock block, the second spring is sleeved on the lock rod, one end of the second spring is connected to the moving block, and the other end of the second spring is connected to the fixed block; The locking mechanism is provided with a self-starting mechanism, which includes an adsorption component, a transmission component and a pulling component. The adsorption component includes a magnet, a limit rod, a limit block and a fifth spring; There are two pulling assemblies, and the two pulling assemblies are respectively arranged corresponding to the two locking assemblies. The pulling assembly includes two pulling units, and the two pulling units are respectively arranged corresponding to the two locking rods of the same locking assembly. The pulling unit includes a pull rope and a wire drum; The transmission assembly includes a belt, a rotating wheel and a moving rod. There are two rotating wheels, which are respectively arranged corresponding to the two pulling assemblies. The rotating wheel and the wire drum are coaxially arranged, and the rotating wheel and the wire drum are connected by transmission. The belt is sleeved on the two rotating wheels, and the two rotating wheels are connected by belt transmission. The moving rod is set on the belt, and the moving rod is connected to the limit block.

2. The CNC machine tool with good safety and good locking effect of the protective door according to claim 1 is characterized in that: The limiting rod is arranged on the main body, and a limiting groove is provided on the limiting rod. The limiting block is located in the limiting groove, and the limiting block is slidably connected to the limiting groove. The fifth spring is arranged in the limiting groove, one end of the fifth spring is connected to the limiting groove, and the other end of the fifth spring is connected to the limiting block. There are two magnets, magnet one is arranged on the protective door, and magnet two is arranged on the limiting block. The two magnets are arranged opposite each other, and the two magnets attract each other. A connecting rod is provided on the side of the protective door close to magnet one, and a slide is provided on the connecting rod. Magnet one is arranged in the slide, and a positioning sleeve is provided on one side of magnet one, a positioning pin is provided in the positioning sleeve, and a positioning hole is provided in the slide. The positioning pin can be inserted in the positioning hole, and the locking mechanism is connected to the adsorption assembly through a pulling assembly and a transmission assembly.

3. The CNC machine tool with good safety and good locking effect of the protective door according to claim 2 is characterized in that: The wire drum is set on the side of the fixed block away from the locking block, one end of the pull rope is connected to the movable block, and the other end of the pull rope is connected to the wire drum. The pull rope is wound on the wire drum. The two wire drums of the same pulling assembly are coaxially arranged, and the two wire drums are connected in transmission. The transmission assembly is set on the two pulling assemblies.

4. The CNC machine tool with good safety and good locking effect of the protective door according to claim 3 is characterized in that: A positioning wheel is provided on one side of the moving block away from the locking rod, and the pull rope passes around the positioning wheel.

5. The CNC machine tool with good safety and good locking effect of the protective door according to claim 1 is characterized in that: The protective door is equipped with a handle.

6. The CNC machine tool with good safety and good locking effect of the protective door according to claim 1 is characterized in that: The protection mechanism includes a barrier assembly and a trigger assembly. The protection door is provided with an observation port, the observation port is provided with a glass cover, the trigger assembly is provided on the glass cover, and the barrier assembly is provided below the glass cover. The barrier assembly includes a fixed frame, a baffle and a third spring. The fixed frame is arranged on the protective door and is located directly below the glass cover. The baffle is arranged in the fixed frame and is slidably connected to the fixed frame. The third spring is arranged in the fixed frame, one end of the third spring is connected to the fixed frame, and the other end of the third spring is connected to the baffle. The trigger assembly includes an airbag and a trigger unit. The airbag is arranged on the glass cover. There are two trigger units, which are respectively arranged on both sides of the fixed frame. The trigger unit includes a sleeve, a piston rod and a fourth spring. The sleeve is arranged on the fixed frame. One end of the piston rod is located in the sleeve, and the other end of the piston rod extends out of the sleeve. The end of the piston rod located outside the sleeve abuts against the end of the baffle away from the third spring. The fourth spring is arranged in the sleeve, one end of the fourth spring is connected to the piston of the piston rod, and the other end of the fourth spring is connected to the sleeve. The sleeve is connected to the inside of the airbag through the trachea.

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