A double-platform double-head screw locking machine

Abstract

The present invention relates to the field of screw locking technology, and in particular to a double-platform double-head screw locking machine, wherein two X-axis transmission mechanisms are arranged on the workbench, and Y-axis transmission mechanisms are arranged on the front and rear end surfaces of the crossbeam, and the two Y-axis transmission mechanisms are connected with a locking mechanism, and the locking mechanism comprises a bottom plate connected with the Y-axis transmission mechanism, a Z-axis transmission mechanism arranged on the bottom plate, a first connecting plate driven by the Z-axis transmission mechanism, an electric screwdriver penetrating the first connecting plate, and a vacuum suction nozzle arranged at the bottom of the electric screwdriver, and a height detection mechanism is arranged on one side of the first connecting plate, and the height detection mechanism comprises a mounting plate arranged on one side of the first connecting plate, a first cylinder and a first guide rail arranged on the mounting plate, a first slider slidably connected to the first guide rail, a first connecting member arranged at the bottom of the first slider, and a probe arranged at the bottom of the first connecting member. The present invention can lock two screws of different specifications, thereby improving the locking efficiency; and at the same time, the depth of the screw hole is detected, so that the locking is more accurate.

Description

Technical Field

[0001] The invention relates to the technical field of screw locking, in particular to a double-platform double-head screw locking machine. Background Art

[0002] The automatic screw locking machine uses various electric and pneumatic components to realize the automatic conveying, tightening, and detection of screws. The equipment simplifies the screw tightening process to reduce the number of manual labor and reduce the adverse factors caused by manual misoperation. The automatic screw locking machine is a typical non-standard automation equipment, which is mainly divided into: handheld screw locking machine, multi-axis automatic screw locking machine, and coordinate automatic screw locking machine. Since the automatic screw locking machine is a non-standard automation equipment with customizable characteristics, products involving screw tightening can obtain corresponding solutions, so its application field is relatively wide. However, many screw locking machines on the market can only lock one fixture and can only lock one specification of screws, which greatly reduces the locking efficiency; and many screw locking machines lack height detection devices and cannot detect the depth of the screw hole, so they cannot accurately detect the height of the screw hole, which may cause the locking depth of the locking mechanism to deviate, which in turn leads to rework and reduces production efficiency. Summary of the invention

[0003] In view of the problems of the prior art, the present invention provides a double-platform double-head screw locking machine, which can lock two screws of different specifications and improve the locking efficiency; at the same time, the depth of the screw hole can be detected to make the locking more accurate.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions: a double-platform double-head screw locking machine, comprising a workbench, a gantry frame is provided on the workbench, and is characterized in that: two X-axis transmission mechanisms are provided on the workbench, and fixtures are provided on the two X-axis transmission mechanisms. Two feeding mechanisms located below the gantry frame are provided between the two X-axis transmission mechanisms, and Y-axis transmission mechanisms are provided on the front and rear end surfaces of the gantry frame. Both Y-axis transmission mechanisms are connected with locking mechanisms, and the locking mechanism includes a Z-axis transmission mechanism, a first connecting plate driven by the Z-axis transmission mechanism, an electric screwdriver inserted through the first connecting plate, and a vacuum suction nozzle provided at the bottom of the electric screwdriver, and a height detection mechanism for detecting the depth of the screw hole is provided on one side of the first connecting plate.

[0005] Preferably, the height detection mechanism includes a mounting plate arranged on one side of the first connecting plate (23), a first cylinder and a first guide rail arranged on the mounting plate, a first slider slidably connected to the first guide rail, a first connecting member arranged at the bottom of the first slider, and a probe arranged at the bottom of the first connecting member, and the piston rod of the first cylinder is connected to the upper end of the first connecting member.

[0006] Preferably, the locking mechanism includes a base plate connected to the Y-axis transmission mechanism, the Z-axis transmission mechanism is arranged on the base plate, the Z-axis transmission mechanism includes a reduction motor arranged at the upper end of the base plate, a rack arranged on the base plate and driven by the reduction motor, a second guide rail arranged on the base plate, a second slider and a third slider slidably connected to the second guide rail, the second slider is located above the third slider, one side of the second guide rail is fixedly connected to the rack, the third slider is provided with a second connecting plate, the first connecting plate is arranged on the second connecting plate, the second slider is provided with a first connecting block, the first connecting block is provided with a first protrusion, the second connecting plate is provided with a second protrusion, a guide shaft and a spring sleeved on the guide shaft are provided between the first protrusion and the second protrusion, one end of the guide shaft is slidably connected to the first protrusion, and the other end of the guide shaft is fixedly connected to the second protrusion.

[0007] Preferably, a linear displacement sensor is slidably connected to one side of the first protrusion, and the bottom of the linear displacement sensor is fixedly connected to the second connecting plate.

[0008] Preferably, the second connecting plate is provided with a third guide rail passing through the first connecting plate, the third guide rail is slidably connected with a fourth slider, the bottom of the fourth slider is connected with a second connecting piece, one end of the second connecting piece is connected to the fourth slider, the vacuum suction nozzle is connected through the other end of the second connecting piece, a screwdriver head is provided at the bottom of the electric screwdriver, the vacuum suction nozzle is sleeved on the lower part of the screwdriver head, a limit block is provided on the fourth slider, and a tension spring is provided between the lower end of the second connecting plate and the limit block.

[0009] Preferably, the fixture includes a base connected to the X-axis transmission mechanism, two supporting feet arranged on the base, a bearing plate arranged on the two supporting feet, a workpiece arranged on the bearing plate, a sleeve arranged at the bottom of the bearing plate, two piston rods inserted through the sleeve, a third connecting block connected to the two piston rods, a pressure block arranged on the top of the third connecting block, a first slide rail and a second slide rail arranged on both sides of the bearing plate, a second cylinder and a third cylinder respectively slidably connected to the first slide rail and the second slide rail, two third connecting members respectively connected to the piston rods of the second cylinder and the third cylinder, a cover plate arranged on the two third connecting members, and two positioning rods respectively arranged on one side of the second cylinder and the third cylinder, both positioning rods pass through the cover plate, a plurality of positioning members for positioning the workpiece are arranged on the bearing plate, and the pressure block is located between the cover plate and the workpiece

[0010] Preferably, the workbench is provided with a protective cover surrounding the gantry frame, the two feeding mechanisms and the two locking mechanisms, and display screens are provided on both the front and rear sides of the protective cover.

[0011] Preferably, the workbench is provided with two emergency stop control devices, and the two emergency stop control devices are respectively located at the front and rear sides of the gantry frame.

[0012] The beneficial effects of the present invention are as follows: when locking is required, the Z-axis transmission mechanism drives the electric screwdriver to approach the feeding mechanism, the vacuum nozzle absorbs the screw, and then the Y-axis transmission mechanism drives the locking mechanism to move back and forth on the beam, and the Z-axis transmission mechanism drives the electric screwdriver to move up and down, and then the workpiece on the fixture is locked, and the two feeding mechanisms can provide two screws of the same or different specifications. Therefore, the present invention can lock the same or different screws on the workpieces on two fixtures at the same time, thereby improving the locking efficiency. Before locking, the Z-axis transmission mechanism drives the height detection mechanism to approach the screw hole, and then the first cylinder pushes the probe into the screw hole to detect the depth of the screw hole. The locking mechanism can accurately lock according to the depth of the screw hole, thereby achieving the effect of improving the locking accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0014] Figure 2 It is a schematic diagram of the overall structure of the present invention from another angle;

[0015] Figure 3 This is a schematic diagram of the structure behind the locking mechanism hiding the protection box;

[0016] Figure 4 This is a schematic diagram of the structure from another angle after the locking mechanism is hidden in the protection box;

[0017] Figure 5 It is a structural diagram of the fixture;

[0018] Figure 6 It is a structural schematic diagram of the fixture from another angle;

[0019] Figure 7 This is a schematic diagram of the structure of the fixture with the cover hidden.

[0020] The reference numerals are as follows: 1, workbench; 11, gantry frame; 12, support frame; 13, crossbeam; 14, X-axis transmission mechanism; 15, Y-axis transmission mechanism; 16, protective cover; 161, display screen; 17, emergency stop control device; 19, feeding mechanism; 2, locking mechanism; 21, bottom plate; 22, Z-axis transmission mechanism; 221, reduction motor; 222, rack; 223, second guide rail; 224, second slider; 2241, first connecting block; 2242, first protrusion; 225, third slider; 2251, second connecting plate; 2252, second protrusion; 226, guide shaft; 227, spring; 228, linear displacement sensor; 23, first connecting plate; 24, electric screwdriver; 2 41. Batch head; 25. Vacuum nozzle; 26. Mounting plate; 27. First cylinder; 28. First guide rail; 29. ​​First slider; 210. First connecting piece; 211. Probe; 212. Third guide rail; 213. Fourth slider; 214. Second connecting piece; 215. Limit block; 216. Tension spring; 217. Protection box; 3. Fixture; 31. Base; 32. Support foot; 33. Loading plate; 34. Workpiece; 35. Sleeve; 36. Piston rod; 37. Third connecting block; 38. Press block; 39. First slide rail; 310. Second slide rail; 311. Second cylinder; 312. Third cylinder; 313. Third connecting piece; 314. Cover plate; 315. Positioning rod; 316. Positioning piece. DETAILED DESCRIPTION

[0021] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with the embodiments and drawings, and the contents mentioned in the embodiments are not intended to limit the present invention. The present invention is described in detail below in conjunction with the drawings.

[0022] Combination Figure 1-Figure 4Analysis, a double-platform double-head screw locking machine, including a workbench 1, the workbench 1 is provided with a gantry frame 11, the gantry frame 11 includes a crossbeam 13 and two support frames 12, the crossbeam 13 is arranged on the two support frames 12, the workbench 1 is provided with two X-axis transmission mechanisms 14, the two X-axis transmission mechanisms are provided with a fixture 3, two feeding mechanisms 19 located below the crossbeam 13 are arranged between the two X-axis transmission mechanisms, the front and rear end surfaces of the crossbeam 13 are provided with Y-axis transmission mechanisms 15, the two Y-axis transmission mechanisms 15 are connected to a locking mechanism 2, the locking mechanism 2 includes a Z-axis transmission mechanism 22, and a first connecting plate 23 driven by the Z-axis transmission mechanism 22 , an electric screwdriver 24 passed through the first connecting plate 23 and a vacuum nozzle 25 arranged at the bottom of the electric screwdriver 24, a height detection mechanism is provided on one side of the first connecting plate 23, and the height detection mechanism includes a mounting plate 26 arranged on one side of the first connecting plate 23, a first cylinder 27 and a first guide rail 28 arranged on the mounting plate 26, a first slider 29 slidably connected to the first guide rail 28, a first connecting piece 210 arranged at the bottom of the first slider 29 and a probe 211 arranged at the bottom of the first connecting piece 210, the piston rod 36 of the first cylinder 27 is connected to the upper end of the first connecting piece 210, and the locking mechanism 2 is provided with a protection box 217 for protecting the various parts on the locking mechanism 2.

[0023] When locking is required, the Z-axis transmission mechanism 22 drives the electric screwdriver 24 to approach the feeding mechanism 19, and the vacuum nozzle 25 sucks the screws. Then the Y-axis transmission mechanism 15 drives the locking mechanism 2 to move back and forth on the beam 13, and the Z-axis transmission mechanism 22 drives the electric screwdriver 24 to move up and down, and then the workpiece 34 on the fixture 3 is locked. The two feeding mechanisms 19 can provide two screws of the same or different specifications. Therefore, the present invention can lock the same or different screws on the workpieces 34 on the two fixtures 3 at the same time, thereby improving the locking efficiency. Before locking, the Z-axis transmission mechanism 22 drives the height detection mechanism to approach the screw hole, and then the first cylinder 27 pushes the probe 211 into the screw hole to detect the depth of the screw hole. The locking mechanism 2 can accurately lock according to the depth of the screw hole, thereby achieving the effect of improving the locking accuracy.

[0024] Combination Figure 3According to analysis, the locking mechanism 2 includes a base plate 21 connected to the Y-axis transmission mechanism 15, the Z-axis transmission mechanism 22 is arranged on the base plate 21, and the Z-axis transmission mechanism 22 includes a reduction motor 221 arranged on the upper end of the base plate 21, a rack 222 arranged on the base plate 21 and driven by the reduction motor 221, a second guide rail 223 arranged on the base plate 21, a second slider 224 and a third slider 225 slidably connected to the second guide rail 223, the second slider 224 is located above the third slider 225, one side of the second guide rail 223 is fixedly connected to the rack, and the third slider 225 is provided with a second slider 224 and a third slider 225. A second connecting plate 2251 is provided, the first connecting plate 23 is provided on the second connecting plate 2251, a first connecting block 2241 is provided on the second sliding block 224, the first connecting block 2241 is provided with a first protrusion 2242, a second protrusion 2252 is provided on the second connecting plate 2251, a guide shaft 226 and a spring 227 sleeved on the guide shaft 226 are provided between the first protrusion 2242 and the second protrusion 2252, one end of the guide shaft 226 is slidably connected to the first protrusion 2242, and the other end of the guide shaft 226 is fixedly connected to the second protrusion 2252. The second connecting plate 2251 is provided with a third guide rail 212 which passes through the first connecting plate 23, and the third guide rail 212 is slidably connected with a fourth slider 213. The bottom of the fourth slider 213 is connected with an "L"-shaped second connecting piece 214, one end of the second connecting piece 214 is connected to the fourth slider 213, and the vacuum suction nozzle 25 is connected to the other end of the second connecting piece 214. A screwdriver head 241 is provided at the bottom of the electric screwdriver 24, and the vacuum suction nozzle 25 is sleeved on the lower part of the screwdriver head 241. A limit block 215 is provided on the fourth slider 213, and a tension spring 216 is provided between the lower end of the second connecting plate 2251 and the limit block 215.

[0025] After the vacuum suction nozzle 25 has finished taking the material, the Z-axis transmission mechanism 22 drives the electric screwdriver 24 to move downward. When the screw locking machine has been working for a long time, the distance of the electric screwdriver 24 moving downward will inevitably produce some errors. When the distance of the electric screwdriver 24 moving downward is too large, the vacuum suction nozzle 25 collides with the workpiece 34, and the tension spring 216 can play a buffering role to protect the vacuum suction nozzle 25. Since the screwdriver bit 241 and the vacuum suction nozzle 25 are slidably connected, after the vacuum suction nozzle 25 collides, the screw connected to the lower end of the screwdriver bit 241 will collide with the workpiece 34, causing the main body of the locking mechanism 2 to be vibrated, which may cause safety problems. A guide shaft 226 and a spring 227 sleeved on the guide shaft 226 are provided between the first protrusion 2242 and the second protrusion 2252. When the vacuum suction nozzle 25 collides with the workpiece 34, it can play a buffering role to protect the main body of the locking mechanism 2.

[0026] Combination Figure 5-Figure 7According to the analysis, the fixture 3 includes a base 31 connected to the X-axis transmission mechanism 14, two supporting feet 32 ​​arranged on the base 31, a bearing plate 33 arranged on the two supporting feet 32, a workpiece 34 arranged on the bearing plate 33, a sleeve 35 arranged at the bottom of the bearing plate 33, two piston rods 36 inserted into the sleeve 35, a third connecting block 37 connected to the two piston rods 36, a pressing block 38 arranged at the top of the third connecting block 37, a first slide rail 39 and a second slide rail 310 arranged on both sides of the bearing plate 33, a second cylinder 311 and a third cylinder 312 respectively connected to the first slide rail 39 and the second slide rail 310, and a first cylinder 311 and a second cylinder 312 respectively connected to the first slide rail 39 and the second slide rail 310. Two third connecting members 313 connected by the piston rods 36 of the second cylinder 311 and the third cylinder 312, a cover plate 314 arranged on the two third connecting members 313, and two positioning rods 315 respectively arranged on one side of the second cylinder 311 and the third cylinder 312, the two positioning rods 315 both penetrate the cover plate 314, the cover plate 314 is connected to the two third connecting members 313 by bolts, the positioning rods 315 are used to position the bolt connection between the cover plate 314 and the two third connecting members 313, a plurality of positioning members 316 for positioning the workpiece 34 are provided on the bearing plate 33, and the pressure block 38 is located between the cover plate 314 and the workpiece 34. The workpiece 34 is placed on the carrier plate 33, the positioning member 316 positions the workpiece 34, and the pressure block 38 is pulled to make the pressure block 38 act on the workpiece 34, and then the cover plate 314 is fixed to the two third connecting members 313 by bolts, and then the second cylinder 311 and the third cylinder 312 are pushed to slide on the first slide rail 39 and the second slide rail 310, so that one side of the cover plate 314 moves to the top of the pressure block 38, so that the cover plate 314 and the pressure block 38 are tightly abutted, thereby pressing the workpiece 34. The fixture 3 has a good fixing effect and is easy and quick to operate, which greatly improves the processing efficiency.

[0027] Combination Figure 3 and Figure 4 It is analyzed that a linear displacement sensor 228 is slidably connected to one side of the first protrusion 2242, and the bottom of the linear displacement sensor 228 is fixedly connected to the second connecting plate 2251. During the locking process, the linear displacement sensor 228 is used to detect the compression length of the spring 227, and then transmit the data back to the control center of the screw locking machine to avoid insufficient locking depth, which may cause the screws to be loosely locked.

[0028] Combination Figure 1 and Figure 2 It is analyzed that the workbench 1 is provided with a protective cover 16 surrounding the gantry frame 11, two feeding mechanisms 19 and two locking mechanisms 2, and the front and rear sides of the protective cover 16 are provided with display screens 161. The two display screens 161 are provided to facilitate the operator to control and monitor the operation of the screw locking machine.

[0029] Combination Figure 1 and Figure 2It is analyzed that the locking mechanism 2 includes a protection box arranged on the bottom plate 21, and the protection box covers the Z-axis transmission mechanism 22, the second connecting plate 2251, the first connecting block 2241, the first protrusion 2242, the second protrusion 2252, the guide shaft 226, the spring 227, the linear displacement sensor 228, the third guide rail 212, the fourth slider 213, the limit block 215 and the tension spring 216. The protection box can be provided to protect the various parts of the locking mechanism 2.

[0030] Combination Figure 1 and Figure 2 It is analyzed that two emergency stop control devices 17 are provided on the workbench 1, and the two emergency stop control devices 17 are respectively located at the front and rear sides of the beam 13 of the gantry frame 11, and the two feeding mechanisms 19 are located between the two emergency stop control devices 17. When the screw locking machine fails, the operator can shut down the screw locking machine through the emergency stop control device 17 to prevent safety accidents.

[0031] Working principle: Before locking, the Z-axis transmission mechanism 22 drives the height detection mechanism to approach the screw hole, and then the first cylinder 27 pushes the probe 211 into the screw hole to detect the depth of the screw hole. The locking mechanism 2 can accurately detect the depth of the screw hole, and then the Z-axis transmission mechanism 22 drives the electric screwdriver 24 to approach the feeding mechanism 19, and the vacuum nozzle 25 sucks the screw. Then the Y-axis transmission mechanism 15 drives the locking mechanism 2 to move back and forth on the beam 13, and the Z-axis transmission mechanism 22 drives the electric screwdriver 24 to move up and down, and the workpiece 34 on the fixture 3 is accurately locked according to the depth of the screw hole.

[0032] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention is disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with the profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent changes and modifications made to the above embodiments according to the technology of the present invention are within the scope of the technical solution of the present invention without departing from the content of the technical solution of the present invention.

Claims

1. A double-platform double-head screw locking machine, comprising a workbench (1), wherein a gantry frame (11) is provided on the workbench (1), characterized in that: The workbench (1) is provided with two X-axis transmission mechanisms (14), and the two X-axis transmission mechanisms (14) are both provided with a fixture (3). Two feeding mechanisms (19) located below the gantry frame (11) are provided between the two X-axis transmission mechanisms. The front and rear end surfaces of the gantry frame (11) are both provided with Y-axis transmission mechanisms (15), and the two Y-axis transmission mechanisms (15) are both connected with a locking mechanism (2). The locking mechanism (2) includes a Z-axis transmission mechanism (22), a first connecting plate (23) driven by the Z-axis transmission mechanism (22), an electric screwdriver (24) inserted through the first connecting plate (23), and a vacuum suction nozzle (25) provided at the bottom of the electric screwdriver (24), and a height detection mechanism for detecting the depth of a screw hole is provided on one side of the first connecting plate (23); The height detection mechanism comprises a mounting plate (26) arranged on one side of a first connecting plate (23), a first cylinder (27) and a first guide rail (28) arranged on the mounting plate (26), a first slider (29) slidably connected to the first guide rail (28), a first connecting member (210) arranged at the bottom of the first slider (29), and a probe (211) arranged at the bottom of the first connecting member (210), wherein a piston rod (36) of the first cylinder (27) is connected to an upper end of the first connecting member (210); When locking is required, the Z-axis transmission mechanism (22) drives the electric screwdriver (24) to approach the feeding mechanism (19), the vacuum suction nozzle (25) sucks the screw, and then the Y-axis transmission mechanism (15) drives the locking mechanism (2) to move back and forth on the beam (13), and the Z-axis transmission mechanism (22) drives the electric screwdriver (24) to move up and down, thereby locking the workpiece (34) on the fixture (3), and the two feeding mechanisms (19) can provide two screws of the same or different specifications, and lock the same or different screws on the workpieces (34) on the two fixtures (3) at the same time; before locking, the Z-axis transmission mechanism (22) drives the height detection mechanism to approach the screw hole, and then the first cylinder (27) pushes the probe (211) into the screw hole to detect the depth of the screw hole, and the locking mechanism (2) performs precise locking according to the depth of the screw hole; The locking mechanism (2) comprises a base plate (21) connected to the Y-axis transmission mechanism (15); the Z-axis transmission mechanism (22) is arranged on the base plate (21); the Z-axis transmission mechanism (22) comprises a reduction motor (221) arranged on the upper end of the base plate (21); a rack (222) arranged on the base plate (21) and driven by the reduction motor (221); a second guide rail (223) arranged on the base plate (21); a second slider (224) slidably connected to the second guide rail (223); and a third slider (225); the second slider (224) is located above the third slider (225); one side of the second guide rail (223) is fixedly connected to the rack (222); the third slider (225) is 5) is provided with a second connecting plate (2251), the first connecting plate (23) is arranged on the second connecting plate (2251), the second sliding block (224) is provided with a first connecting block (2241), the first connecting block (2241) is provided with a first protrusion (2242), the second connecting plate (2251) is provided with a second protrusion (2252), a guide shaft (226) and a spring (227) sleeved on the guide shaft (226) are provided between the first protrusion (2242) and the second protrusion (2252), one end of the guide shaft (226) is slidably connected to the first protrusion (2242), and the other end of the guide shaft (226) is fixedly connected to the second protrusion (2252); A linear displacement sensor (228) is slidably connected to one side of the first convex block (2242), and a bottom of the linear displacement sensor (228) is fixedly connected to the second connecting plate (2251); The second connecting plate (2251) is provided with a third guide rail (212) penetrating the first connecting plate (23); the third guide rail (212) is slidably connected with a fourth slider (213); the bottom of the fourth slider (213) is connected with a second connecting member (214); one end of the second connecting member (214) is connected to the fourth slider (213); the vacuum suction nozzle (25) is connected to the other end of the second connecting member (214); a screwdriver bit (241) is provided at the bottom of the electric screwdriver (24); the vacuum suction nozzle (25) is sleeved on the lower part of the screwdriver bit (241); a limit block (215) is provided on the fourth slider (213); a tension spring (216) is provided between the lower end of the second connecting plate (2251) and the limit block (215); During the screw locking process, the linear displacement sensor (228) is used to detect the compression length of the spring (227), and then transmits the data back to the control center of the screw locking machine; When the vacuum suction nozzle (25) has finished taking the material, the Z-axis transmission mechanism (22) drives the electric screwdriver (24) to move downward. When the electric screwdriver (24) moves downward too far, the vacuum suction nozzle (25) collides with the workpiece (34). The tension spring (216) plays a buffering role. The screwdriver bit (241) is slidably connected to the vacuum suction nozzle (25). After the vacuum suction nozzle (25) collides, the screw connected to the lower end of the screwdriver bit (241) collides with the workpiece (34), causing the main body of the locking mechanism (2) to vibrate. A guide shaft (226) and a spring (227) sleeved on the guide shaft (226) are provided between the first protrusion (2242) and the second protrusion (2252). When the vacuum suction nozzle (25) collides with the workpiece (34), a buffering role is played to protect the main body of the locking mechanism (2). The fixture (3) comprises a base (31) connected to the X-axis transmission mechanism (14), two supporting feet (32) arranged on the base (31), a bearing plate (33) arranged on the two supporting feet (32), a workpiece (34) arranged on the bearing plate (33), a sleeve (35) arranged at the bottom of the bearing plate (33), two piston rods (36) passing through the sleeve (35), a third connecting block (37) connected to the two piston rods (36), a pressing block (38) arranged on the top of the third connecting block (37), a first slide rail (39) and a second slide rail (310) arranged on both sides of the bearing plate (33), and a workpiece (34) slidably connected to the first slide rail (39) and the first slide rail (310). The second cylinder (311) and the third cylinder (312) of the two slide rails (310), two third connecting members (313) respectively connected to the piston rods (36) of the second cylinder (311) and the third cylinder (312), a cover plate (314) provided on the two third connecting members (313), and two positioning rods (315) respectively provided on one side of the second cylinder (311) and the third cylinder (312), the two positioning rods (315) both pass through the cover plate (314), a plurality of positioning members (316) for positioning the workpiece (34) are provided on the bearing plate (33), and the pressing block (38) is located between the cover plate (314) and the workpiece (34); The workpiece (34) is placed on the carrier plate (33), the positioning member (316) positions the workpiece (34), the pressing block (38) is pulled so that the pressing block (38) acts on the workpiece (34), and then the cover plate (314) is fixed to the two third connecting members (313) by bolts, and then the second cylinder (311) and the third cylinder (312) are pushed to slide on the first slide rail (39) and the second slide rail (310), so that one side of the cover plate (314) moves to above the pressing block (38), so that the cover plate (314) and the pressing block (38) are tightly abutted, thereby pressing the workpiece.

2. A double-platform double-head screw locking machine according to claim 1, characterized in that: The workbench (1) is provided with a protective cover (16) surrounding the gantry frame (11), the two feeding mechanisms (19) and the two locking mechanisms (2), and display screens (161) are provided on both the front and rear sides of the protective cover (16).

3. A double-platform double-head screw locking machine according to claim 1, characterized in that: The workbench (1) is provided with two emergency stop control devices (17), and the two emergency stop control devices (17) are respectively located at the front and rear sides of the gantry frame (11).

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