A CNC machine tool with a safety limit mechanism

Abstract

The present invention relates to the technical field of CNC machine tools, and specifically to a CNC machine tool with a safety limit mechanism, comprising a cabin, a console capable of controlling the machine tool being provided on one side of the cabin, a sealed door capable of improving its airtightness being provided on the front side of the cabin, a driver being provided on the outer wall of the cabin close to the console, a trolley capable of sliding in the cabin being provided on the outer wall of the driver, a telescopic assembly capable of extending and retracting up and down being provided at the bottom of the trolley, the bottom of the telescopic assembly being movably connected to the top of the reset assembly, and the outer wall of the reset assembly being fixedly connected to one side of the transmission assembly, and when an erroneous operation occurs and a tool collision occurs, after the drill bit drives the rotating ring to tilt, the trigger head will be connected to the upper and lower trigger springs respectively, so that the upper and lower trigger springs are connected, causing a short circuit and power failure in the power supply system of the entire device, and the drill bit stops working after the power is cut off, which can avoid damage to the drill bit due to continuous operation.

Description

Technical Field

[0001] The present invention relates to the technical field of numerically controlled machine tools, in particular to a numerically controlled machine tool with a safety limiting mechanism. Background Art

[0002] A CNC machine tool, short for digitally controlled machine tool, is an automated machine tool equipped with a program-controlled system. This control system logically processes programs specified by control codes or other symbolic instructions, decodes them, and represents them as coded numbers, which are then input into the CNC device via an information carrier. After processing, the CNC device issues various control signals to control the machine's movements, automatically producing parts according to the shape and dimensions specified in the drawing. Limits on CNC machines are divided into soft and hard limits. Soft limits are set via parameters, while hard limits are physical switches, such as limit switches.

[0003] Currently, most CNC machine tools on the market are prone to tool collisions due to operator errors during use. After the tool collision, the drill bit is tilted by the force, and continuous release from the workpiece will cause the drill bit to break, and even cause the workpiece or drill bit to splash. Summary of the Invention

[0004] The purpose of the present invention is to provide a CNC machine tool with a safety limit mechanism to solve the problem mentioned in the background art that after the drill bit hits the workpiece, the drill bit is tilted due to the force, and the drill bit breaks after continuous release from the workpiece, and even causes the workpiece or drill bit to splash. To achieve the above purpose, the present invention provides the following technical solution: A CNC machine tool with a safety limit mechanism includes a cabin, a control console capable of controlling the machine tool is provided on one side of the cabin, a sealing door capable of improving its airtightness is provided on the front of the cabin, a drive is provided on the outer wall of the cabin near the control console, and a trolley capable of sliding within the cabin is provided on the outer wall of the drive.

[0005] The bottom of the trolley is provided with a telescopic assembly that can be extended and retracted up and down, the bottom of the telescopic assembly is movably connected to the top of the reset assembly, the outer wall of the reset assembly is fixedly connected to one side of the transmission assembly, the inner wall of the transmission assembly is provided with a protective assembly that can slide up and down, the inner wall of the protective assembly is provided with a curtain plate assembly that can slide freely, and the bottom of the reset assembly is provided with a drilling assembly that can process the workpiece, the telescopic assembly can support and limit the reset assembly, and the reset assembly can unlock the locked state of the telescopic assembly after the drilling assembly is triggered.

[0006] Preferably, the telescopic assembly includes a hydraulic telescopic machine, the top of the hydraulic telescopic machine is fixedly connected to the bottom of the trolley, and the output end of the hydraulic telescopic machine is fixedly connected to the top of the telescopic table, the bottom of the telescopic table is fixedly connected to the top of the telescopic block, and the outer wall of the telescopic block is rotatably connected to the inner wall of the deflection support block, the bottom of the deflection support block is provided with a protruding wedge block, and the outer wall of the wedge block is in sliding contact with the inner wall of the reset assembly, and the top of the telescopic table is fixedly connected to the bottom of the transmission assembly.

[0007] Preferably, the reset assembly includes a reset spring, the top of the reset spring is fixedly connected to the bottom of the telescopic platform, and the other end of the reset spring is fixedly connected to the top of the reset platform, the top of the reset platform is provided with a limit groove for the wedge block to slide, and a fixed plate is provided at the center of the top of the reset platform, one side of the fixed plate is fixedly connected to one end of the fixed tube, and the inner wall of the fixed tube close to the fixed plate is fixedly connected to one side of the power-losing electromagnet, the power-losing electromagnet loses its magnetism and is magnetically connected to the magnetic block after energization, and the outer wall of the magnetic block is slidably connected to the inner wall of the fixed tube, the other side of the magnetic block is fixedly connected to one end of the push rod, and the other end of the push rod is fixedly connected with an unlocking block capable of unlocking the deflection support block from the top of the reset platform, and the top of the reset platform is provided with an unlocking groove for the unlocking block to slide, and the outer wall of the reset platform is fixedly connected to one side of the transmission assembly.

[0008] Preferably, the transmission assembly includes a connecting block, one side of the connecting block is fixedly connected to the outer wall of the reset platform, and the other side of the connecting block is fixedly connected to one side of the rising rack, the outer wall of the rising rack is meshed with the outer wall of the transmission gear, and the inner wall of the transmission gear is rotatably connected to the outer wall of the transmission block, a movable plate is provided on the top of the transmission block, and the bottom of the transmission block is fixedly connected to the top of the telescopic platform, and a transmission groove for sliding of the protective assembly is opened on one side of the transmission block.

[0009] Preferably, the protective assembly includes a stabilizing block, the outer wall of one side of the stabilizing block is slidably connected to the inner wall of the transmission groove, and the inner top wall of the stabilizing block is fixedly connected to the bottom of the protective cover, the inner side wall of the protective cover is fixedly connected to one side of the descending rack, and the other side of the descending rack is meshed with the outer wall of the transmission gear, the outer wall of the protective cover near the top is fixedly connected to one side of the linkage plate, and one side of the linkage plate is movably connected to one side of the locking assembly, the top of the locking assembly is movably abutted against the outer wall of the curtain piece assembly, and the outer wall of the protective cover away from the linkage plate is fixedly connected to the inner wall of the guide block, the inner wall of the guide block is provided with a guide groove for the curtain piece assembly to slide, and the inner wall of the guide block near the top is provided with a locking groove for the locking assembly to slide, and the top of the protective cover is provided with a through opening for the abutment plate to pass through.

[0010] Preferably, the locking assembly includes a compression spring, one end of the compression spring is fixedly connected to one side of the linkage plate, and the other end of the compression spring is fixedly connected to one side of the plug-in block, the top of the plug-in block is movably abutted against the outer wall of the curtain assembly, and the outer wall of the plug-in block is provided with a locking plate that can slide in the locking groove, the number of the plug-in blocks is two, and the two plug-in blocks are fixedly connected by a trigger rod that can be pushed by the abutment plate.

[0011] Preferably, the curtain panel assembly includes an abutment handle, the outer wall of the abutment handle is movably abutted against the top of the plug-in block, and one side of the abutment handle is fixedly connected to one end of the sliding rod, the outer wall of the sliding rod is slidably connected to the inner wall of the guide groove, and the outer wall of the sliding rod is provided with a connecting piece that can be deflected unilaterally, one side of the connecting piece is fixedly connected to one side of the curtain panel block, and the bottom of the curtain panel block is fixedly connected to the top of the tilting block.

[0012] Preferably, the left side of the curtain piece block is designed as an inclined surface, and the inclination angle of the inclined surface matches the inclination angle of the inclined block. When the curtain piece block abuts against the inclined block, it deflects to the right.

[0013] Preferably, the drilling rig assembly includes a drilling rig body, the top of the drilling rig body is fixedly mounted on the bottom of the reset platform by bolts, and a clamping head is provided at the bottom of the drilling rig body, the inner wall of the clamping head clamps the drill bit through a clamping block, and the bottom of the clamping head is fixedly connected to a connecting ring, the clamping head is fixedly connected to the top of the touch box through the connecting ring, and the inner top wall and inner bottom wall of the touch box are both provided with annular trigger springs, the inner wall of the touch box is provided with a rotatable rotating ring, and the outer wall of the rotating ring near the middle is provided with a conductive plate, the outer wall of the conductive plate is symmetrically provided with trigger heads through conductive lines, and the two trigger heads are movably abutted against the trigger spring located on the inner bottom wall of the touch box in an initial state, the rotating ring can tilt at a small angle inside the touch box, and after tilting, the rotating ring will cause the trigger head to tilt so that the upper and lower trigger springs are connected.

[0014] Preferably, the trigger spring is electrically connected to the power supply system of the device, and when the upper and lower trigger springs are connected, a short circuit occurs in the power supply system of the entire device, thereby causing power outage.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] In the present invention, when an erroneous operation occurs and a tool collision occurs, the drill bit drives the rotating ring to tilt, and the trigger head will be connected to the upper and lower trigger springs respectively, so that the upper and lower trigger springs are connected, causing a short circuit in the power supply system of the entire device and a power outage. After the power is cut off, the drill bit stops working, which can avoid damage to the drill bit due to continuous operation.

[0017] In the present invention, after the determination, the power-off electromagnet loses power and becomes magnetic, and the like-charged repelling power electromagnet drives the push rod to move through the magnetic block, and the push rod pushes the unlocking block to abut against the outer wall of the deflection support block, so that the deflection support block is disengaged from the limit groove, and under the tensile force of the reset spring, the reset platform drives the drilling rig body upward to separate the drill bit from the workpiece, thereby preventing the drill bit from continuously contacting the workpiece.

[0018] In the present invention, the reset platform moves upward, and the protective cover will drop below the horizontal position of the drill bit through the coordinated use of the rising rack, the transmission gear and the descending rack. At the same time, the sliding rod slides in the guide block under the action of gravity. After the connecting piece extends from between the guide block and the protective cover, the curtain piece block and the tilting block extending between the guide block and the protective cover will wrap around the bottom of the drill bit, thereby protecting the drill bit and preventing the drill bit from being damaged secondary. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional view of the overall structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 3 Schematic diagram of the internal structure of the present invention;

[0022] Figure 4 It is a cross-sectional view of the internal structure of the present invention;

[0023] Figure 5 This is a diagram showing the internal structure connection relationship of the present invention;

[0024] Figure 6 It is a schematic structural diagram of the transmission assembly and the protection assembly of the present invention;

[0025] Figure 7 Schematic diagram of the structure of the curtain blade assembly of the present invention;

[0026] Figure 8 This is a schematic diagram of the protective component structure of the present invention Figure 1 ;

[0027] Figure 9 This is a schematic diagram of the protective component structure of the present invention Figure 2 ;

[0028] Figure 10 It is a schematic structural diagram of the reset assembly and the drilling assembly of the present invention;

[0029] Figure 11 It is a schematic diagram of the telescopic assembly structure of the present invention.

[0030] In the figure: 1. Cabin; 2. Control console; 3. Sealed door; 4. Drive; 5. Trolley; 6. Telescopic assembly; 601. Hydraulic telescopic machine; 602. Telescopic platform; 603. Telescopic block; 604. Deflection support block; 7. Reset assembly; 701. Reset spring; 702. Reset platform; 703. Fixed plate; 704. Fixed tube; 705. Deenergized electromagnet; 706. Magnetic block; 707. Push rod; 708. Unlocking block; 8. Transmission assembly; 801. Transmission block; 802. Abutment plate; 803. Transmission gear; 804. Rising rack; 805. Connecting block; 9. Protection assembly; 901. Stabilizing block; 90 2. Protective cover; 903. Lowering rack; 904. Locking assembly; 90401. Compression spring; 90402. Plug-in block; 90403. Locking plate; 905. Guide block; 906. Linkage plate; 10. Curtain plate assembly; 1001. Abutment handle; 1002. Sliding rod; 1003. Connecting plate; 1004. Curtain plate block; 1005. Tilt block; 11. Drill assembly; 1101. Drill body; 1102. Clamping head; 1103. Drill bit; 1104. Connecting ring; 1105. Touch box; 1106. Trigger reed; 1107. Rotating ring; 1108. Conductive plate; 1109. Trigger head. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0032] See also Figures 1 to 11 The present invention provides a technical solution: a CNC machine tool with a safety limit mechanism, comprising a cabin 1, a control console 2 capable of controlling the machine tool is provided on one side of the cabin 1, a sealing door 3 capable of improving its airtightness is provided on the front of the cabin 1, a drive 4 is provided on the outer wall of the cabin 1 near the control console 2, and a trolley 5 capable of sliding in the cabin 1 is provided on the outer wall of the drive 4.

[0033] The bottom of the trolley 5 is provided with a telescopic component 6 that can be extended and retracted up and down. The bottom of the telescopic component 6 is movably connected to the top of the reset component 7. The outer wall of the reset component 7 is fixedly connected to one side of the transmission component 8. The inner wall of the transmission component 8 is provided with a protective component 9 that can slide up and down. The inner wall of the protective component 9 is provided with a curtain plate component 10 that can slide freely. The bottom of the reset component 7 is provided with a drilling component 11 that can process the workpiece. The telescopic component 6 can support and limit the reset component 7. The reset component 7 can unlock the locked state of the telescopic component 6 after the drilling component 11 is triggered.

[0034] In this embodiment, Figures 1 to 11 As shown, the telescopic assembly 6 includes a hydraulic telescopic machine 601, the top of the hydraulic telescopic machine 601 is fixedly connected to the bottom of the trolley 5, and the output end of the hydraulic telescopic machine 601 is fixedly connected to the top of the telescopic platform 602, the bottom of the telescopic platform 602 is fixedly connected to the top of the telescopic block 603, and the outer wall of the telescopic block 603 is rotatably connected to the inner wall of the deflection support block 604, the bottom of the deflection support block 604 is provided with a protruding wedge block, and the outer wall of the wedge block is in sliding contact with the inner wall of the reset assembly 7, the top of the telescopic platform 602 is fixedly connected to the bottom of the transmission assembly 8, and the hydraulic telescopic machine 601 can push the reset assembly 7 to a specified horizontal position.

[0035] In this embodiment, Figures 1 to 11 As shown, the reset assembly 7 includes a reset spring 701, the top of the reset spring 701 is fixedly connected to the bottom of the telescopic platform 602, and the other end of the reset spring 701 is fixedly connected to the top of the reset platform 702, the top of the reset platform 702 is provided with a limiting groove for the sliding of the wedge block, and a fixed plate 703 is provided at the center of the top of the reset platform 702, one side of the fixed plate 703 is fixedly connected to one end of the fixed tube 704, and the inner wall of the fixed tube 704 close to the side of the fixed plate 703 is fixedly connected to one side of the de-energizing electromagnet 705, and the de-energizing electromagnet 705 loses its magnetism after being energized and is magnetically connected to the magnetic block 706 , and the outer wall of the magnetic block 706 is slidably connected to the inner wall of the fixed tube 704, and the other side of the magnetic block 706 is fixedly connected to one end of the push rod 707, and the other end of the push rod 707 is fixedly connected to an unlocking block 708 that can unlock the deflection support block 604 from the top of the reset platform 702, and the top of the reset platform 702 is provided with an unlocking groove for the unlocking block 708 to slide, and the outer wall of the reset platform 702 is fixedly connected to one side of the transmission assembly 8. After the power is lost, the magnetic direction of the de-energized electromagnet 705 is different from the magnetic direction of the magnetic block 706, and electromagnetic repulsion will occur, thereby pushing the magnetic block 706 to slide in the fixed tube 704.

[0036] In this embodiment, Figures 1 to 11 As shown, the transmission assembly 8 includes a connecting block 805, one side of the connecting block 805 is fixedly connected to the outer wall of the reset platform 702, and the other side of the connecting block 805 is fixedly connected to one side of the rising rack 804, the outer wall of the rising rack 804 is meshed with the outer wall of the transmission gear 803, and the inner wall of the transmission gear 803 is rotatably connected to the outer wall of the transmission block 801, a movable plate 802 is provided on the top of the transmission block 801, and the bottom of the transmission block 801 is fixedly connected to the top of the telescopic platform 602, and a transmission groove for sliding of the protective assembly 9 is opened on one side of the transmission block 801.

[0037] In this embodiment, Figures 1 to 11As shown, the protective assembly 9 includes a stabilizing block 901, the outer wall of one side of the stabilizing block 901 is slidably connected to the inner wall of the transmission groove, and the inner top wall of the stabilizing block 901 is fixedly connected to the bottom of the protective cover 902, the inner side wall of the protective cover 902 is fixedly connected to one side of the descending rack 903, and the other side of the descending rack 903 is meshed with the outer wall of the transmission gear 803, the outer wall of the protective cover 902 near the top is fixedly connected to one side of the linkage plate 906, and one side of the linkage plate 906 is fixedly connected to the lower rack 903. One side of the locking assembly 904 is movably connected, the top of the locking assembly 904 is movably abutted against the outer wall of the curtain assembly 10, and the outer wall of the protective cover 902 away from the linkage plate 906 is fixedly connected to the inner wall of the guide block 905, the inner wall of the guide block 905 is provided with a guide groove for the curtain assembly 10 to slide, and the inner wall of the guide block 905 near the top is provided with a locking groove for the locking assembly 904 to slide, and the top of the protective cover 902 is provided with a through opening for the abutment plate 802 to pass through.

[0038] In this embodiment, Figures 1 to 11 As shown, the locking assembly 904 includes a compression spring 90401, one end of the compression spring 90401 is fixedly connected to one side of the linkage plate 906, and the other end of the compression spring 90401 is fixedly connected to one side of the plug-in block 90402, the top of the plug-in block 90402 is movably abutted against the outer wall of the curtain assembly 10, and the outer wall of the plug-in block 90402 is provided with a locking plate 90403 that can slide in the locking groove, the number of the plug-in blocks 90402 is two, and the two plug-in blocks 90402 are fixedly connected by a trigger rod that can be pushed by the abutment plate 802.

[0039] In this embodiment, Figures 1 to 11 As shown, the curtain panel assembly 10 includes an abutting handle 1001, the outer wall of the abutting handle 1001 is movably abutted against the top of the plug-in block 90402, and one side of the abutting handle 1001 is fixedly connected to one end of the sliding rod 1002, the outer wall of the sliding rod 1002 is slidably connected to the inner wall of the guide groove, and the outer wall of the sliding rod 1002 is provided with a connecting piece 1003 that can be deflected on one side, one side of the connecting piece 1003 is fixedly connected to one side of the curtain panel block 1004, and the bottom of the curtain panel block 1004 is fixedly connected to the top of the tilting block 1005.

[0040] In this embodiment, Figures 1 to 11 As shown, the left side of the curtain piece block 1004 is designed as an inclined surface, and the inclination angle of the inclined surface matches the inclination angle of the inclined block 1005. When the curtain piece block 1004 abuts the inclined block 1005, it will deflect to the right.

[0041] In this embodiment, Figures 1 to 11As shown, the drilling rig assembly 11 includes a drilling rig body 1101, the top of the drilling rig body 1101 is fixedly mounted on the bottom of the reset platform 702 by bolts, and a clamping head 1102 is provided at the bottom of the drilling rig body 1101, the inner wall of the clamping head 1102 clamps the drill bit 1103 through a clamping block, and the bottom of the clamping head 1102 is fixedly connected to a connecting ring 1104, the clamping head 1102 is fixedly connected to the top of the touch box 1105 through the connecting ring 1104, and the inner top wall and inner bottom wall of the touch box 1105 are both provided with an annular trigger spring 1106, the touch box A rotatable rotating ring 1107 is provided on the inner wall of 1105, and a conductive plate 1108 is provided on the outer wall of the rotating ring 1107 near the middle. Trigger heads 1109 are symmetrically provided on the outer wall of the conductive plate 1108 through conductive lines, and the two trigger heads 1109 are movably abutted against the trigger spring 1106 located on the inner bottom wall of the touch box 1105 in the initial state. The rotating ring 1107 can tilt at a small angle inside the touch box 1105, and after tilting, the rotating ring 1107 will cause the trigger head 1109 to tilt, thereby connecting the upper and lower trigger springs 1106.

[0042] In this embodiment, Figures 1 to 11 As shown, the trigger reed 1106 is electrically connected to the power supply system of the device, and when the upper and lower trigger reeds 1106 are connected, the power supply system of the entire device will be short-circuited, thereby cutting off the power.

[0043] The use method and advantages of the present invention: When the CNC machine tool with a safety limit mechanism is in operation, the working process is as follows:

[0044] like Figures 1 to 11As shown, after the workpiece is placed in the cabin 1, the sealing door 3 is closed, and the stroke of the driver 4 is limited by the console 2, the console 2 controls the hydraulic telescopic machine 601 to push the telescopic table 602 downward, and the telescopic table 602 pushes the reset table 702 downward through the deflection support block 604, and the reset table 702 drives the drilling rig body 1101 to move downward, and the drilling rig body 1101 drives the drill bit 1103 to contact the workpiece through the clamping head 1102. If an erroneous operation occurs and a tool collision occurs, the drill bit 1103 will tilt. After the drill bit 1103 tilts, it drives the rotating ring 1107 to tilt in the touch box 1105. After the rotating ring 1107 tilts, it drives the trigger head 1101 to move downward. 9 is respectively connected to the upper and lower trigger springs 1106, so that the upper and lower trigger springs 1106 are connected, causing a short circuit in the power supply system of the entire device, and the drill bit 1103 stops working after the power is cut off. At the same time, the power-off electromagnet 705 loses power and becomes magnetic. The like-sex repulsion power-off electromagnet 705 pushes the magnetic block 706 to slide quickly in the fixed tube 704. The magnetic block 706 pushes the unlocking block 708 to abut against the outer wall of the deflection support block 604 through the push rod 707, so that the deflection support block 604 is separated from the limit groove. Under the tensile force of the reset spring 701, the reset platform 702 drives the drilling rig body 1101 to move upward, so that the drill bit 1103 is separated from the workpiece. At the same time, the reset platform 702 is connected to the lower and upper trigger springs 1106, and the drill bit 1103 is separated from the workpiece. The rising rack 804 is driven upward by the connecting block 805, and the rising rack 804 pushes the transmission gear 803 to rotate on the outer wall of the transmission block 801 under the meshing force. When the transmission gear 803 rotates, it drives the descending rack 903 to move downward through the meshing force, and the descending rack 903 drives the protective cover 902 to move downward, and the protective cover 902 drives the stabilizing block 901 to slide in the transmission groove. When the stabilizing block 901 abuts the top of the transmission block 801, the abutting plate 802 penetrates the protective cover 902 and pushes the plug-in block 90402 to compress the compression spring 90401, and the plug-in block 90402 drives the locking plate 90403 to slide in the limiting groove. Due to the limiting effect of the limiting groove, the plug-in Block 90402 can only slide axially, so that the plug-in block 90402 is pulled out from under the abutment handle 1001. After the abutment handle 1001 is separated from the plug-in block 90402, the sliding rod 1002 can slide downward in the guide block 905 under the action of gravity. When the sliding rod 1002 slides downward, it will push the connecting piece 1003 to slide downward. After the connecting piece 1003 extends from between the guide block 905 and the protective cover 902, the connecting piece 1003 deflects to the right to make the curtain piece block 1004 abut against the tilting block 1005. The curtain piece block 1004 and the tilting block 1005 extending from between the guide block 905 and the protective cover 902 will be wrapped directly under the drill bit 1103 to protect the drill bit 1103.

[0045] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A numerically controlled machine tool with a safety limit mechanism, comprising a cabin (1), a control console (2) capable of controlling the machine tool being provided on one side of the cabin (1), a sealing door (3) capable of improving its airtightness being provided on the front of the cabin (1), a driver (4) being provided on the outer wall of the cabin (1) on the side close to the control console (2), and a trolley (5) capable of sliding in the cabin (1) being provided on the outer wall of the driver (4). Its characteristics are: The bottom of the trolley (5) is provided with a telescopic assembly (6) capable of extending and retracting up and down, the telescopic assembly (6) comprising a hydraulic telescopic machine (601), the top of the hydraulic telescopic machine (601) being fixedly connected to the bottom of the trolley (5), and the output end of the hydraulic telescopic machine (601) being fixedly connected to the top of the telescopic platform (602), the bottom of the telescopic platform (602) being fixedly connected to the top of the telescopic block (603), and the outer wall of the telescopic block (603) being rotatably connected to the inner wall of the deflection support block (604), the bottom of the deflection support block (604) being provided with a protruding wedge block, and the outer wall of the wedge block being in sliding contact with the inner wall of the reset assembly (7), the top of the telescopic platform (602) being in contact with the transmission assembly (8 ), the bottom of the telescopic assembly (6) is movably connected to the top of the reset assembly (7), the reset assembly (7) includes a reset spring (701), the top of the reset spring (701) is fixedly connected to the bottom of the telescopic platform (602), and the other end of the reset spring (701) is fixedly connected to the top of the reset platform (702), the top of the reset platform (702) is provided with a limiting groove for sliding the wedge block, and a fixed plate (703) is provided at the center of the top of the reset platform (702), one side of the fixed plate (703) is fixedly connected to one end of the fixed tube (704), and the inner wall of the fixed tube (704) close to the fixed plate (703) is connected to the inner wall of the power-losing electromagnet (705). One side is fixedly connected, the de-energized electromagnet (705) loses its magnetism after being energized and is magnetically connected to the magnetic block (706), and the outer wall of the magnetic block (706) is slidably connected to the inner wall of the fixed tube (704), the other side of the magnetic block (706) is fixedly connected to one end of the push rod (707), the other end of the push rod (707) is fixedly connected to an unlocking block (708) capable of unlocking the deflection support block (604) from the top of the reset platform (702), and the top of the reset platform (702) is provided with an unlocking groove for the unlocking block (708) to slide, the outer wall of the reset platform (702) is fixedly connected to one side of the transmission component (8), and the outer wall of the reset component (7) is fixedly connected to one side of the transmission component (8) The inner wall of the transmission assembly (8) is provided with a protective assembly (9) capable of sliding up and down, the inner wall of the protective assembly (9) is provided with a curtain sheet assembly (10) capable of sliding freely, the bottom of the reset assembly (7) is provided with a drilling assembly (11) capable of processing a workpiece, the drilling assembly (111) comprises a drilling body (1101), the top of the drilling body (1101) is fixedly mounted on the bottom of the reset platform (702) by bolts, and the bottom of the drilling body (1101) is provided with a clamping head (1102), the inner wall of the clamping head (1102) clamps a drill bit (1103) through a clamping block, and the bottom of the clamping head (1102) is fixedly connected to a connecting ring (1104),The clamping head (1102) is fixedly connected to the top of the touch box (1105) via a connecting ring (1104), and the inner top wall and the inner bottom wall of the touch box (1105) are both provided with an annular trigger spring (1106), the inner wall of the touch box (1105) is provided with a rotatable rotating ring (1107), and the outer wall of the rotating ring (1107) near the middle is provided with a conductive plate (1108), the outer wall of the conductive plate (1108) is symmetrically provided with trigger heads (1109) through a conductive line, and the two trigger heads (1109) are arranged on the outer wall of the conductive plate (1108). ) is in active contact with the trigger spring (1106) located on the inner bottom wall of the touch box (1105) in the initial state, and the rotating ring (1107) can tilt at a small angle inside the touch box (1105), and after the rotating ring (1107) tilts, the trigger head (1109) tilts so that the upper and lower trigger springs (1106) are connected, and the telescopic component (6) can support and limit the reset component (7), and the reset component (7) can unlock the locked state of the telescopic component (6) after the drilling component (11) is triggered.

2. A CNC machine tool with a safety limit mechanism according to claim 1, characterized in that: The transmission assembly (8) includes a connecting block (805), one side of the connecting block (805) is fixedly connected to the outer wall of the reset platform (702), and the other side of the connecting block (805) is fixedly connected to one side of the rising rack (804), the outer wall of the rising rack (804) is meshed with the outer wall of the transmission gear (803), and the inner wall of the transmission gear (803) is rotatably connected to the outer wall of the transmission block (801), the top of the transmission block (801) is provided with a supporting plate (802), and the bottom of the transmission block (801) is fixedly connected to the top of the telescopic platform (602), and one side of the transmission block (801) is provided with a transmission groove for sliding the protective assembly (9).

3. A CNC machine tool with a safety limit mechanism according to claim 2, characterized in that: The protective assembly (9) includes a stabilizing block (901), an outer wall of one side of the stabilizing block (901) is slidably connected to the inner wall of the transmission groove, and an inner top wall of the stabilizing block (901) is fixedly connected to the bottom of the protective cover (902), an inner side wall of the protective cover (902) is fixedly connected to one side of the descending rack (903), and the other side of the descending rack (903) is meshedly connected to the outer wall of the transmission gear (803), and an outer wall of the protective cover (902) near the top is fixedly connected to one side of the linkage plate (906), and one side of the linkage plate (906) is meshed with the outer wall of the transmission gear (803). One side of the locking assembly (904) is movably connected, the top of the locking assembly (904) is movably abutted against the outer wall of the curtain plate assembly (10), and the outer wall of the protective cover (902) away from the linkage plate (906) is fixedly connected to the inner wall of the guide block (905), the inner wall of the guide block (905) is provided with a guide groove for the curtain plate assembly (10) to slide, and the inner wall of the guide block (905) near the top is provided with a locking groove for the locking assembly (904) to slide, and the top of the protective cover (902) is provided with a through opening for the abutment plate (802) to pass through.

4. A CNC machine tool with a safety limit mechanism according to claim 3, characterized in that: The locking assembly (904) includes a compression spring (90401), one end of the compression spring (90401) is fixedly connected to one side of the linkage plate (906), and the other end of the compression spring (90401) is fixedly connected to one side of the plug-in block (90402), the top of the plug-in block (90402) is movably abutted against the outer wall of the curtain plate assembly (10), and the outer wall of the plug-in block (90402) is provided with a locking plate (90403) that can slide in the locking groove, the number of the plug-in blocks (90402) is two, and the two plug-in blocks (90402) are fixedly connected via a trigger rod that can be pushed by the abutting plate (802).

5. The CNC machine tool with a safety limit mechanism according to claim 4, characterized in that: The curtain slat assembly (10) comprises an abutting handle (1001), the outer wall of the abutting handle (1001) is movably abutted against the top of the plug-in block (90402), and one side of the abutting handle (1001) is fixedly connected to one end of the sliding rod (1002), the outer wall of the sliding rod (1002) is slidably connected to the inner wall of the guide groove, and the outer wall of the sliding rod (1002) is provided with a connecting piece (1003) capable of unilateral deflection, one side of the connecting piece (1003) is fixedly connected to one side of the curtain slat block (1004), and the bottom of the curtain slat block (1004) is fixedly connected to the top of the tilting block (1005).

6. The CNC machine tool with a safety limit mechanism according to claim 5, characterized in that: The left side of the curtain piece block (1004) is designed as an inclined surface, and the inclination angle of the inclined surface matches the inclination angle of the inclined block (1005). When the curtain piece block (1004) abuts against the inclined block (1005), it deflects to the right.

7. The CNC machine tool with a safety limit mechanism according to claim 1, characterized in that: The trigger reed (1106) is electrically connected to the power supply system of the device, and when the upper and lower trigger reeds (1106) are connected, a short circuit occurs in the power supply system of the entire device, thereby causing power outage.

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