A power-off anti-drop device for torque motor of five-axis five-linkage CNC machine tool

Abstract

The present invention relates to the technical field of numerical control machine tools, and specifically to a power-off anti-drop device for a torque motor of a five-axis five-linkage numerical control machine tool, comprising a machine base, a rotating shaft head is arranged above the machine base, a torque motor is fixedly installed in the middle of the rotating shaft head, a swing shaft head is movably connected to the bottom of the rotating shaft head, and a rotating tube is fixedly installed on both sides of the top of the swing shaft head. Compared with the prior art, the present invention sets an electromagnet, and when the device is powered off, no current passes through the electromagnet. At this time, the adsorption sheet loses the attraction of the electromagnet, and the elasticity of the spring drives the two adsorption sheets to move relative to each other instantly, and drives the locking block to be inserted into the rectangular groove provided on the surface of the locking plate through the extension shaft, thereby realizing the locking of the rotating tube, thereby positioning the swing shaft head, avoiding the swing shaft head from contacting with the workpiece when the power is off, avoiding damage to the workpiece, and reducing the loss caused by the power off.

Description

Technical Field

[0001] The invention relates to the technical field of numerically controlled machine tools, and in particular to a power-off anti-drop device for a torque motor of a five-axis five-linkage numerically controlled machine tool. Background Art

[0002] The five-axis five-link CNC machine tool is a high-tech, high-precision machine tool specially used for processing complex surfaces. It is widely used in the production and processing of impellers, blades, marine propellers, heavy-duty generator rotors, turbine rotors, large diesel engine crankshafts, etc.

[0003] Most of the existing five-axis five-linkage CNC machine tools are driven by torque motors, which drive the drill to move in all directions. By coordinating with the movement of the tooling platform, all-round processing of the workpiece is achieved. However, when in use, if the swing axis rotates to ninety degrees and there is a sudden power outage, the system will lose control of the swing axis. At this time, under the influence of gravity, the swing axis will quickly swing down and contact the workpiece, causing damage to the workpiece. Since the workpiece materials processed by the five-axis five-linkage CNC machine tools are mostly precious materials, it will cause huge losses to production.

[0004] When using existing five-axis five-linkage CNC machine tools, most of them realize drilling and cutting of workpieces by installing drill bits. In order to avoid damage to the drill bits, drill bits of different lengths are usually used to realize drilling and cutting respectively. However, when the drilling depth is large, the original cutting drill bit needs to be replaced with a longer drilling drill bit, which is complicated to operate and reduces the production efficiency of the device. Most of the five-axis five-linkage CNC machine tools need to be reset for each axis. When resetting, the workpiece usually needs to be taken out, and then the shaft head is driven by each torque motor to move. For the swing shaft, the shaft head after processing often forms an angle with the horizontal plane. When resetting, the torque motor is required to drive the swing shaft head to swing downward, so as to achieve the reset of the swing shaft head. Therefore, when resetting, the torque motor is also required to work alone, which increases the energy consumption of the device and the use cost of the device. Summary of the invention

[0005] 1. Technical issues to be solved

[0006] The present invention is aimed at the above-mentioned defects existing in the prior art, and specially proposes a power-off anti-drop device for the torque motor of a five-axis five-linkage CNC machine tool, which solves the problem in the prior art that if a sudden power outage occurs, the system will lose control of the swing axis.

[0007] 2. Technical Solution

[0008] In order to solve the above technical problems, the present invention provides a power-off anti-falling device for a torque motor of a five-axis five-linkage CNC machine tool, comprising a machine base, a rotating shaft head is arranged above the machine base, a torque motor is fixedly installed in the middle of the rotating shaft head, a swing shaft head is movably connected to the bottom of the rotating shaft head, a rotating tube is fixedly installed on the left and right sides of the top of the swing shaft head, a locking plate is fixedly installed on the left and right sides of the bottom of the middle of the rotating shaft head, an electromagnet is fixedly installed on the top of the swing shaft head, an adsorption sheet is movably connected to the top of the swing shaft head, an extension shaft is fixedly installed on the top of the adsorption sheet, and a part of the extension shaft away from the electromagnet A locking block is fixedly installed on the surface, and the current in the electromagnet is adjusted to reduce the magnetic force generated by the electromagnet. The elasticity of the spring drives the two extension shafts to move relative to each other through the adsorption sheet, so that the two extension shafts drive the locking block to fit with the side of the locking plate close to the axis of the torque motor. At this time, the torque motor is powered off, and the swing shaft head swings downward under the action of gravity. The friction between the locking block and the locking plate can reduce the swinging speed of the swing shaft head, so that the swing shaft head slowly swings down to reset. A telescopic rod and a spring are fixedly installed in the middle of the adsorption sheet, and a driving motor is fixedly installed on the bottom end of the swing shaft head, and a drill bit is movably sleeved on the output end of the driving motor.

[0009] Preferably, a transmission wheel 1 is fixedly mounted on the surface of the rotating tube, the surface of the transmission wheel 1 is transmission-connected with a transmission belt, the top end of the transmission belt is transmission-connected with a transmission wheel 2, the transmission wheel 2 is fixedly sleeved on the output ends on the left and right sides of the torque motor, the transmission wheel 2 is driven to rotate by the torque motor, and the transmission belt transmission connects the transmission wheel 2 and the transmission wheel 1, thereby realizing the swinging of the swing shaft head.

[0010] Preferably, a connecting frame is fixedly installed on the bottom end of the adsorption sheet, a clamping mechanism is fixedly installed on the bottom end of the connecting frame, an active tube is fixedly sleeved on the output end of the driving motor, and a plug-in rod is fixedly installed on the top end of the drill bit. By inserting the drill bit into the bottom end of the swing shaft head, the plug-in rod is sequentially inserted into the middle part of the two clamping rings and the active tube, and the driving motor drives the active tube to rotate. When the active tube rotates, it drives the top end of the plug-in rod to rotate, thereby driving the drill bit to rotate and contact the workpiece to process the workpiece.

[0011] Preferably, the clamping mechanism includes a semicircular ring magnetic frame, which is fixedly mounted on one end of the connecting frame close to the axis of the driving motor, the inner cavity of the semicircular ring magnetic frame is movably connected with a clamping ring, the inner cavity of the semicircular ring magnetic frame is provided with a circular ring groove, and a positioning ring is fixedly mounted on the surface of the clamping ring, and the positioning ring is movably connected in the circular ring groove, and the current in the electromagnet is controlled to reduce the magnetic force of the electromagnet. At this time, the elasticity of the spring drives the two adsorption plates to move relative to each other, so that the two adsorption plates drive the two connecting frames to move relative to each other, so that the two clamping rings loosen the plug-in rod, and under the action of gravity, the drill bit will move downward, and when the bottom end of the drill bit extends out of the swing shaft head to a length suitable for drilling, the current passing through the electromagnet is increased, thereby increasing the magnetic force of the electromagnet, so that the electromagnet adsorbs the adsorption plate through magnetic force, thereby driving the two clamping rings to clamp the plug-in rod to fix the drill bit.

[0012] Preferably, there are two semi-circular magnetic frames and two clamping rings, and the two semi-circular magnetic frames and the two clamping rings are magnetically connected. The middle parts of the two clamping rings and the middle part of the active tube are plugged into the surface of the plug-in rod. The magnetism of the semi-circular magnetic frame can attract the clamping ring, thereby ensuring that the clamping ring can rotate in the semi-circular magnetic frame, thereby ensuring the normal operation of the device.

[0013] Preferably, the machine base includes a transmission connecting box, which is transmission-connected to the top of the rotating shaft head, and the top of the transmission connecting box is transmission-connected with a vertical moving mechanism, and the rear end of the transmission connecting box is transmission-connected with a longitudinal moving mechanism, the right end of the longitudinal moving mechanism is transmission-connected with a tank chain, and the bottom end of the tank chain is transmission-connected with a transverse driving box, and the left end of the transverse driving box is fixedly installed with a frame, and the bottom end of the frame is fixedly installed with a loading platform, and the loading platform is located directly below the swing shaft head. The workpiece is fixed on the loading platform, and then the device is started, and the transverse driving box drives the tank chain to move, thereby making the longitudinal moving mechanism move laterally, and the longitudinal moving mechanism is transmission-connected with the transmission connecting box, so that the transmission connecting box can move longitudinally, and the transmission connection between the transmission connecting box and the vertical moving mechanism can realize that the vertical moving mechanism drives the rotating shaft head to move up and down, and the transmission connection between the rotating shaft head and the swing shaft head can drive the swing shaft head to swing, so that the drill bit can perform all-round processing on the device.

[0014] Preferably, there are two adsorption sheets, one side of the two adsorption sheets close to the electromagnet is in contact with the electromagnet, the two adsorption sheets are magnetically connected to the electromagnet, the extension shaft is movably connected in the inner cavity of the rotating tube, and the magnetic force generated by the electromagnet on the adsorption sheet is greater than the elasticity applied to the adsorption sheet by the spring, thereby achieving no contact between the locking block and the locking plate during normal production, thereby allowing the device to operate normally.

[0015] Preferably, the spring is movably sleeved on the surface of the telescopic rod, and the telescopic rod and the spring are both located above the electromagnet. No current flows through the electromagnet, and the adsorption sheet loses the attraction of the electromagnet. The elasticity of the spring drives the two adsorption sheets to move relative to each other instantaneously, thereby driving the locking block to be inserted into the rectangular groove provided on the surface of the locking plate through the extension shaft, thereby locking the rotating tube and positioning the swinging shaft head to prevent the swinging shaft head from contacting the workpiece when the power is off.

[0016] Preferably, the connecting frame is in a "C" shape, and there are two connecting frames in total, which are respectively located on the left and right sides of the driving motor to avoid interference between the two connecting frames and the driving motor when moving, thereby ensuring the normal operation of the device.

[0017] 3. Beneficial Effects

[0018] Compared with the prior art, the present invention arranges an electromagnet, the magnetism of which attracts the adsorption sheet to separate the locking plate from the locking block. When the device is powered off, no current flows through the electromagnet. At this time, the adsorption sheet loses the attraction of the electromagnet, and the elasticity of the spring drives the two adsorption sheets to move relative to each other instantaneously. The locking block is driven by the extension shaft to be inserted into the rectangular groove provided on the surface of the locking plate, thereby locking the rotating tube and positioning the swinging shaft head, preventing the swinging shaft head from contacting the workpiece when the power is off, avoiding damage to the workpiece, and reducing the loss caused by the power off.

[0019] At the same time, by controlling the current in the electromagnet, the magnetic force of the electromagnet is reduced. At this time, the elasticity of the spring drives the two adsorption sheets to move relative to each other, causing the connecting frame to move relative to each other, thereby driving the two clamping rings to loosen the plug-in rod. Under the action of gravity, the drill bit will move downward. When the bottom end of the drill bit extends out of the swing shaft head to a length suitable for drilling, the current in the electromagnet increases the magnetic force of the electromagnet, causing the electromagnet to adsorb the adsorption sheet through magnetic force, thereby driving the two clamping rings to clamp the plug-in rod to fix the drill bit, thereby reducing the time required for tool replacement and improving the working efficiency of the device.

[0020] The spring also reduces the amount of electric current that is in the electromagnet and the amount of force that is in the locking plate that is in the locking plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the swing shaft head connection structure of the present invention;

[0023] Figure 3 It is a schematic diagram of the cross-sectional structure of the rotating shaft head of the present invention;

[0024] Figure 4 For the present invention Figure 3 The enlarged structural diagram at A in the middle;

[0025] Figure 5 This is a schematic diagram of the extension shaft connection structure of the present invention;

[0026] Figure 6 This is a schematic diagram of the locking state structure of the present invention when the power is off;

[0027] Figure 7 This is a schematic diagram of the explosion connection structure of the drive motor of the present invention;

[0028] Figure 8 This is a schematic diagram of the explosive connection structure of the drill bit of the present invention;

[0029] Fig. 9 For the present invention Figure 8 Enlarged structural diagram at B in the middle.

[0030] In the figure: 1. base; 2. rotating shaft head; 3. torque motor; 4. swinging shaft head; 5. rotating tube; 6. locking plate; 7. locking block; 8. electromagnet; 9. adsorption sheet; 10. extension shaft; 11. telescopic rod; 12. spring; 13. drive motor; 14. drill bit; 15. transmission wheel 1; 16. transmission belt; 17. transmission wheel 2; 18. connecting frame; 19. clamping mechanism; 20. active tube; 21. semicircular magnetic frame; 22. clamping ring; 23. plug-in rod; 24. frame; 25. horizontal drive box; 26. tank chain; 27. longitudinal moving mechanism; 28. transmission connecting box; 29. ​​vertical moving mechanism; 30. loading platform. DETAILED DESCRIPTION

[0031] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0032] Embodiment 1:

[0033] See also Figure 2-6The present invention provides an embodiment: a power-off anti-drop device for a torque motor of a five-axis five-linkage CNC machine tool, comprising a machine base 1, a rotating shaft head 2 is arranged above the machine base 1, a torque motor 3 is fixedly installed in the middle of the rotating shaft head 2, a swing shaft head 4 is movably connected to the bottom of the rotating shaft head 2, a rotating tube 5 is fixedly installed on both sides of the top of the swing shaft head 4, a locking plate 6 is fixedly installed on both sides of the left and right sides of the bottom of the middle of the rotating shaft head 2, an electromagnet 8 is fixedly installed on the top of the swing shaft head 4, an adsorption sheet 9 is movably connected to the top of the swing shaft head 4, an extension shaft 10 is fixedly installed on the top of the adsorption sheet 9, and a locking block 7 is fixedly installed on the side of the extension shaft 10 away from the electromagnet 8, and the electric The current in the magnet 8 reduces the magnetic force generated by the electromagnet 8, and the elasticity of the spring 12 drives the two extension shafts 10 to move relative to each other through the adsorption sheet 9, so that the two extension shafts 10 drive the locking block 7 to fit with the side of the locking plate 6 close to the axis of the torque motor 3. At this time, the torque motor 3 is powered off, and the swing shaft head 4 swings downward under the action of gravity. The friction between the locking block 7 and the locking plate 6 can reduce the downward swing speed of the swing shaft head 4, so that the swing shaft head 4 slowly swings downward for reset. A telescopic rod 11 and a spring 12 are fixedly installed in the middle of the adsorption sheet 9, and a drive motor 13 is fixedly installed at the bottom end of the swing shaft head 4, and a drill bit 14 is movably sleeved on the output end of the drive motor 13.

[0034] Furthermore, a transmission wheel 15 is fixedly installed on the surface of the rotating tube 5, and a transmission belt 16 is connected to the surface of the transmission wheel 15, and a transmission wheel 2 17 is connected to the top of the transmission belt 16. The transmission wheel 2 17 is fixedly sleeved on the output ends on the left and right sides of the torque motor 3, and the transmission wheel 2 17 is driven to rotate by the torque motor 3. The transmission belt 16 is connected to the transmission wheel 2 17 and the transmission wheel 1 15, so that the swing shaft head 4 can be swung.

[0035] In the present embodiment, there are two adsorption sheets 9, and one side of the two adsorption sheets 9 close to the electromagnet 8 is in contact with the electromagnet 8. The two adsorption sheets 9 are magnetically connected to the electromagnet 8. The extension shaft 10 is movably connected in the inner cavity of the rotating tube 5. The magnetic force generated by the electromagnet 8 on the adsorption sheet 9 is greater than the elasticity applied by the spring 12 to the adsorption sheet 9, thereby achieving no contact between the locking block 7 and the locking plate 6 during normal production, thereby allowing the device to operate normally.

[0036] like Figure 7 As shown, the spring 12 is movably sleeved on the surface of the telescopic rod 11, and the telescopic rod 11 and the spring 12 are both located above the electromagnet 8. No current flows through the electromagnet 8. At this time, the adsorption sheet 9 loses the attraction of the electromagnet 8, and the elasticity of the spring 12 drives the two adsorption sheets 9 to move relative to each other instantly, thereby driving the locking block 7 to be inserted into the rectangular groove provided on the surface of the locking plate 6 through the extension shaft 10, thereby locking the rotating tube 5, thereby positioning the swing shaft head 4 to prevent the swing shaft head 4 from contacting the workpiece when the power is off.

[0037] Embodiment 2:

[0038] Compared with Example 1, this embodiment Figure 7-9 As shown, a connecting frame 18 is fixedly installed at the bottom end of the adsorption sheet 9, a clamping mechanism 19 is fixedly installed at the bottom end of the connecting frame 18, an active tube 20 is fixedly sleeved at the output end of the driving motor 13, and a plug-in rod 23 is fixedly installed at the top end of the drill bit 14. By inserting the drill bit 14 into the bottom end of the swing shaft head 4, the plug-in rod 23 is sequentially inserted into the middle part of the two clamping rings 22 and the active tube 20, and the driving motor 13 drives the active tube 20 to rotate. When the active tube 20 rotates, it drives the top end of the plug-in rod 23 to rotate, thereby driving the drill bit 14 to rotate and contact with the workpiece to process the workpiece.

[0039] The clamping mechanism 19 includes a semicircular magnetic frame 21, which is fixedly mounted on one end of the connecting frame 18 close to the axis of the driving motor 13. The inner cavity of the semicircular magnetic frame 21 is movably connected with a clamping ring 22. The inner cavity of the semicircular magnetic frame 21 is provided with a circular groove. A positioning ring is fixedly mounted on the surface of the clamping ring 22. The positioning ring is movably connected in the circular groove. By controlling the current in the electromagnet 8, the magnetic force of the electromagnet 8 is reduced. At this time, the elasticity of the spring 12 drives the two adsorption sheets 9 to move relative to each other, so that the two adsorption sheets 9 drive the two connecting frames 18 to move relative to each other, so that the two clamping rings 22 loosen the plug-in rod 23. Under the action of gravity, the drill bit 14 will move downward. When the bottom end of the drill bit 14 extends out of the swing shaft head 4 to a length suitable for drilling, the current passing through the electromagnet 8 is increased, thereby increasing the magnetic force of the electromagnet 8, so that the electromagnet 8 adsorbs the adsorption sheet 9 through magnetic force, thereby driving the two clamping rings 22 to clamp the plug-in rod 23 to fix the drill bit 14.

[0040] There are two semicircular magnetic frames 21 and two clamping rings 22, and the two semicircular magnetic frames 21 and the two clamping rings 22 are magnetically connected. The middle parts of the two clamping rings 22 and the middle part of the active tube 20 are plugged into the surface of the plug-in rod 23. The magnetism of the semicircular magnetic frame 21 can attract the clamping ring 22, thereby ensuring that the clamping ring 22 can rotate in the semicircular magnetic frame 21, thereby ensuring the normal operation of the device.

[0041] The connecting frame 18 is in a "C" shape. There are two connecting frames 18, which are respectively located on the left and right sides of the driving motor 13 to avoid interference between the two connecting frames 18 and the driving motor 13 when moving, thereby ensuring the normal operation of the device.

[0042] Embodiment 3:

[0043] Compared with Example 1, in this embodiment, the base 1 includes a transmission connection box 28, which is transmission-connected to the top of the rotating shaft head 2, and the top of the transmission connection box 28 is transmission-connected to a vertical moving mechanism 29, and the rear end of the transmission connection box 28 is transmission-connected to a longitudinal moving mechanism 27, and the right end of the longitudinal moving mechanism 27 is transmission-connected to a tank chain 26, and the bottom end of the tank chain 26 is transmission-connected to a transverse driving box 25, and the left end of the transverse driving box 25 is fixedly installed with a frame 24, and the bottom end of the frame 24 is fixedly installed with a loading platform 30, and the loading platform 30 is located directly below the swing shaft head 4 The workpiece is fixed on the loading platform 30, and then the device is started. The transverse driving box 25 drives the tank chain 26 to move, so that the longitudinal moving mechanism 27 moves transversely. The longitudinal moving mechanism 27 is connected to the transmission connection box 28, so that the transmission connection box 28 can move longitudinally. The transmission connection box 28 is connected to the vertical moving mechanism 29, so that the vertical moving mechanism 29 drives the rotating shaft head 2 to move up and down. The transmission connection between the rotating shaft head 2 and the swing shaft head 4 can drive the swing shaft head 4 to swing, so that the drill bit 14 can perform all-round processing on the device.

[0044] When the five-axis five-linkage CNC machine tool torque motor power-off anti-drop device of this embodiment is in use, the workpiece is fixed on the loading platform 30, and then the device is started, the transverse driving box 25 drives the tank chain 26 to move, so that the longitudinal moving mechanism 27 moves horizontally, and the longitudinal moving mechanism 27 is connected to the transmission connection box 28 for transmission, so that the transmission connection box 28 can move longitudinally, and the transmission connection box 28 is connected to the vertical moving mechanism 29 for transmission, so that the vertical moving mechanism 29 drives the rotating shaft head 2 to move up and down, and the torque motor 3 drives the transmission wheel 2 17 to rotate, and the transmission belt 16 is connected to the transmission wheel 2 17 and the transmission wheel 1 15, so that the swinging shaft head 4 can swing, so that the drill bit 14 can perform all-round processing on the device;

[0045] During processing, the drill bit 14 is inserted into the bottom end of the swing shaft head 4, and the plug-in rod 23 is inserted into the middle of the two clamping rings 22 and the active tube 20 in sequence. The driving motor 13 drives the active tube 20 to rotate. When the active tube 20 rotates, the top end of the plug-in rod 23 is driven to rotate, thereby driving the drill bit 14 to rotate and contact the workpiece, and processing the workpiece;

[0046] When deeper drilling is required, the current in the electromagnet 8 is controlled to reduce the magnetic force of the electromagnet 8. At this time, the elasticity of the spring 12 drives the two adsorption sheets 9 to move relative to each other, so that the two adsorption sheets 9 drive the two connecting frames 18 to move relative to each other, so that the two clamping rings 22 loosen the plug-in rod 23. At this time, under the action of gravity, the drill bit 14 will move downward. When the bottom end of the drill bit 14 extends out of the swing shaft head 4 to a length suitable for drilling, the current passing through the electromagnet 8 is increased, thereby increasing the magnetic force of the electromagnet 8, so that the electromagnet 8 adsorbs the adsorption sheet 9 through magnetic force, thereby driving the two clamping rings 22 to clamp the plug-in rod 23 to fix the drill bit 14.

[0047] When it is necessary to reset the swing shaft head 4, the current in the electromagnet 8 is adjusted to reduce the magnetic force generated by the electromagnet 8. The elasticity of the spring 12 drives the two extension shafts 10 to move relative to each other through the adsorption sheet 9, so that the two extension shafts 10 drive the locking block 7 to fit with the locking plate 6 close to the axis of the torque motor 3. At this time, the torque motor 3 is powered off, and the swing shaft head 4 swings downward under the action of gravity. The friction between the locking block 7 and the locking plate 6 can reduce the swing speed of the swing shaft head 4, so that the swing shaft head 4 slowly swings downward to reset.

[0048] When the device is suddenly powered off, no current flows through the electromagnet 8. At this time, the adsorption sheet 9 loses the attraction of the electromagnet 8, and the elasticity of the spring 12 drives the two adsorption sheets 9 to move relative to each other instantly, thereby driving the locking block 7 to be inserted into the rectangular groove provided on the surface of the locking plate 6 through the extension shaft 10, thereby locking the rotating tube 5, thereby positioning the swing shaft head 4 to prevent the swing shaft head 4 from contacting the workpiece when the power is off.

[0049] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A five-axis five-linkage CNC machine tool torque motor power-off anti-drop device, characterized in that: The five-axis five-linkage CNC machine tool torque motor power-off anti-drop device comprises a machine base (1), a rotating shaft head (2) is provided above the machine base (1), a torque motor (3) is fixedly installed in the middle of the rotating shaft head (2), a swing shaft head (4) is movably connected to the bottom of the rotating shaft head (2), a rotating tube (5) is fixedly installed on both sides of the top of the swing shaft head (4), a locking plate (6) is fixedly installed on both sides of the left and right sides of the bottom of the middle of the rotating shaft head (2), an electromagnet (8) is fixedly installed on the top of the swing shaft head (4), an adsorption sheet (9) is movably connected to the top of the swing shaft head (4), an extension shaft (10) is fixedly installed on the top of the adsorption sheet (9), and a locking block (7) is fixedly installed on the side of the extension shaft (10) away from the electromagnet (8). A telescopic rod (11) and a spring (12) are fixedly mounted in the middle of the adsorption sheet (9); a driving motor (13) is fixedly mounted at the bottom end of the swing shaft head (4); and a drill bit (14) is movably sleeved at the output end of the driving motor (13); There are two adsorption sheets (9), one side of the two adsorption sheets (9) close to the electromagnet (8) is in contact with the electromagnet (8), the two adsorption sheets (9) are magnetically connected to the electromagnet (8), and the magnetic force of the electromagnet (8) on the adsorption sheet (9) is greater than the elastic force applied by the spring (12), the extension shaft (10) is movably connected in the inner cavity of the rotating tube (5), the locking block (7) corresponds to the rectangular groove on the surface of the locking plate (6), A transmission wheel 1 (15) is fixedly mounted on the surface of the rotating tube (5); a transmission belt (16) is transmission-connected to the surface of the transmission wheel 1 (15); a top end of the transmission belt (16) is transmission-connected to a transmission wheel 2 (17); and the transmission wheel 2 (17) is fixedly sleeved on the output ends on the left and right sides of the torque motor (3); The torque motor (3) drives the second transmission wheel (17) to rotate, and the transmission belt (16) drives and connects the second transmission wheel (17) and the first transmission wheel (15), so that the swing shaft head (4) can swing; The spring (12) is movably sleeved on the surface of the telescopic rod (11), and the telescopic rod (11) and the spring (12) are both located above the electromagnet (8); When the electromagnet (8) is powered off, the elastic force of the spring (12) drives the adsorption sheet (9) to move relative to one another, driving the locking block (7) to insert into the rectangular groove of the locking plate (6), thereby locking the rotating tube (5) and positioning the swing shaft head (4).

2. The power-off anti-drop device for torque motors of five-axis five-linkage CNC machine tools according to claim 1 is characterized in that: A connecting frame (18) is fixedly mounted on the bottom end of the adsorption sheet (9), a clamping mechanism (19) is fixedly mounted on the bottom end of the connecting frame (18), an active tube (20) is fixedly sleeved on the output end of the drive motor (13), and a plug-in rod (23) is fixedly mounted on the top end of the drill bit (14).

3. The power-off anti-drop device for torque motors of five-axis five-linkage CNC machine tools according to claim 2 is characterized in that: The clamping mechanism (19) comprises a semi-circular magnetic frame (21), the semi-circular magnetic frame (21) being fixedly mounted on one end of the connecting frame (18) close to the axis of the driving motor (13), the inner cavity of the semi-circular magnetic frame (21) being movably connected to a clamping ring (22), the inner cavity of the semi-circular magnetic frame (21) being provided with a circular groove, a positioning ring being fixedly mounted on the surface of the clamping ring (22), and the positioning ring being movably connected in the circular groove.

4. The power-off anti-drop device for torque motors of five-axis five-linkage CNC machine tools according to claim 3 is characterized in that: There are two of each of the semi-circular magnetic frames (21) and the clamping rings (22), the two semi-circular magnetic frames (21) and the two clamping rings (22) are magnetically connected, and the middle parts of the two clamping rings (22) and the middle part of the active tube (20) are plugged into the surface of the plug-in rod (23).

5. The power-off anti-drop device for torque motors of five-axis five-linkage CNC machine tools according to claim 1 is characterized in that: The machine base (1) comprises a transmission connection box (28), wherein the transmission connection box (28) is transmission-connected to the top end of the rotating shaft head (2), the top end of the transmission connection box (28) is transmission-connected to a vertical moving mechanism (29), the rear end of the transmission connection box (28) is transmission-connected to a longitudinal moving mechanism (27), the right end of the longitudinal moving mechanism (27) is transmission-connected to a tank chain (26), the bottom end of the tank chain (26) is transmission-connected to a transverse driving box (25), the left end of the transverse driving box (25) is fixedly mounted to a frame (24), the bottom end of the frame (24) is fixedly mounted to a loading platform (30), and the loading platform (30) is located directly below the swing shaft head (4).

6. The power-off anti-drop device for torque motors of five-axis five-linkage CNC machine tools according to claim 2 is characterized in that: The connecting frame (18) is in a "C" shape, and there are two connecting frames (18) in total. The two connecting frames (18) are respectively located on the left and right sides of the driving motor (13).

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