CN115383451A

CN115383451A - Screw locking device

Info

Publication number: CN115383451A
Application number: CN202211043280.5A
Authority: CN
Inventors: 张自鑫
Original assignee: Suzhou Inspur Intelligent Technology Co Ltd
Current assignee: Suzhou Inspur Intelligent Technology Co Ltd
Priority date: 2022-08-29
Filing date: 2022-08-29
Publication date: 2022-11-25
Anticipated expiration: 2042-08-29
Also published as: CN115383451B

Abstract

The invention provides a screw locking device, which relates to the technical field of servers and adopts the following scheme: including fixing base, last lid and control box, go up the lid connect in the fixing base, go up the lid with it can make to be provided with the jacking spring between the fixing base go up the lid and reset in vertical direction, go up the lid lock and arrive the upper portion of control box, be provided with two at least rotary driving subassemblies in the control box, rotary driving subassembly provides power by the motor, install the electricity on the rotary driving subassembly and criticize the head, rotary driving subassembly can drive the electricity is criticized the head and is rotated, the electricity is criticized the head and is stretched out the control box. The synchronous locking of at least two screws can be completed, and the screw locking efficiency is greatly improved.

Description

Screw locking device

Technical Field

The invention relates to the technical field of servers, in particular to a screw locking device.

Background

In the process of assembling the server and the computer product, the heat sink required for heat dissipation of the CPU is locked to the motherboard (shown in fig. 1). Because the CPU is a valuable item and its interior is a high-precision semiconductor device integrated, the order and torque of locking screws are strictly required when mounting the CPU heat sink. From the perspective of engineering mechanics and structure, the mode of locking four or more screws of the radiator at the same time is to generate the minimum stress to the CPU, and the production efficiency is the highest.

However, in consideration of the existing tools and cost, in order to prevent the CPU from being damaged due to stress generated by locking the heat sink and prevent the raised edge of the heat sink from aligning with the screw hole of the motherboard, most companies adopt a manual diagonal circulation locking manner (arrow direction shown in fig. 2) to lock the CPU heat sink. The existing mode of locking the screws on the CPU radiator has the following defects: screws are manually locked in sequence at a time, so that the production efficiency is low, and the production labor cost is high; locking is required according to the diagonal sequence without strict controllable conditions, so that the staff is difficult to ensure to operate completely according to the requirements, the locking sequence is wrong, the radiator is difficult to lock or a CPU is damaged. Increasing assembly and material loss costs. The manual screwdriver locks the radiator screw, so that the screwdriver head can jump a gun, the risk that the screwdriver head damages a radiator or a mainboard is caused, the assembly cost and the material loss cost are increased, and the first pass yield and the quality of a product are reduced.

Disclosure of Invention

The invention aims to provide and design a screw locking device aiming at the problems of manual screwdriver locking and attaching of a radiator screw. The locking device can realize that at least two screws on the radiator are simultaneously and downwards locked and attached at the same level, can avoid the stress generated by the successive locking and attachment of the screws and the phenomenon of difficult alignment of screw holes, consumes less time for locking and attaching, improves the production efficiency of products and reduces the production cost.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a screw lock attaches device, includes the fixing base, goes up lid and control box, go up the lid connect in the fixing base, go up the lid with it can make to be provided with the jacking spring between the fixing base go up the lid and reset in vertical direction, it arrives to go up the lid lock the upper portion of control box, be provided with two at least rotary driving subassembly in the control box, rotary driving subassembly provides power by the motor, install the electricity on the rotary driving subassembly and criticize the head, rotary driving subassembly can drive the electricity is criticized the head and is rotated, the electricity is criticized the head and is stretched out the control box. Through set up two at least rotary driving subassemblies in the automatically controlled case, all have the electricity on every rotary driving subassembly and criticize the head, after the head is criticized to the screw that needs the lock to attach, rotate in step under rotary driving subassembly's drive, press down, and then accomplish the lock of two at least screws and attach, lift up after accomplishing, go up lid and control box and reset under the effect of jacking spring, improved screw lock by a wide margin and attached efficiency.

Furthermore, the rotary driving assembly comprises a driving wheel, a driving shaft, a driving block and a driven block, the driving wheel is in transmission connection with the motor, the driving shaft is connected with the driving wheel and can rotate along with the driving wheel, the driving shaft is connected with the driving block, the driving block can be clamped with the driven block, the electric screwdriver head is mounted on the driven block, and a torsion adjusting assembly is arranged on the driving block. Install the band pulley on the motor in this scheme, the drive wheel also is the band pulley, connect through the belt between two band pulleys, the drive wheel is with power transmission to the drive shaft of motor output, the drive shaft is with power transmission to the drive block that drive gear transmission comes, the drive block under torsion adjusting part's extrusion, with the driven block, and with power transmission to the driven block that the drive shaft transmission comes, then the driven block with power transmission to the electric screwdriver head that the drive block transmission comes, thereby realize that the electric screwdriver head has the torsion of locking screw.

Further, torsion adjusting part includes torsion control fore-set, torsion control spring and torsion adjusting cap, the torsion control fore-set is located the top of drive block, the torsion control fore-set has a plurality ofly, and is a plurality of the torsion control fore-set interval arrangement, the torsion control spring suit is in on the torsion control fore-set, the torsion adjusting cap with the cooperation of torsion control spring and the flexible volume that can adjust the torsion control spring. The torsion adjusting cap is used for adjusting and controlling the expansion amount of the torsion control spring, when the adjusting cap moves downwards, the compression amount of the spring is increased, the torsion control ejection column presses the driving block downwards under the extrusion action of the spring, so that the driving block and the driven block are extruded more tightly, the torsion value transmitted between the driving block and the driven block is increased, and vice versa.

Furthermore, the torsion adjusting cap is in threaded connection with an outer barrel, the driving block is installed in the outer barrel, an inner barrel capable of moving up and down is arranged in the outer barrel, a top wall of the inner barrel is provided with a top post installation hole, an annular pushing groove is formed in the torsion adjusting cap, the torsion control top post penetrates through the top post installation hole and then is inserted into the pushing groove, and the torsion control spring is located below the pushing groove. The torque adjusting cap is located above the clamping arm, moves up and down by twisting the torque adjusting cap, so that the control spring changes in the length of the torque control ejection column, generates different extrusion forces, and achieves the effect of adjusting the torque force.

Furthermore, be provided with spacing boss on the torque control fore-set, on spacing boss was received in torque control spring's lower part butt, the bottom of torque control fore-set had a convex surface, the upper portion of driving block has the extrusion face, and a convex surface and extrusion face cooperate. The extrusion surface is used for being combined with the top convex surface of the torque control ejection column, so that the downward thrust of the torque control ejection column is transferred to the driving block.

Furthermore, a rotating shaft is arranged on the upper portion of the driving block, a cross groove is formed in the rotating shaft, a cross pin is arranged on the driving shaft, and the cross pin is clamped with the cross groove. The driving shaft can be clamped in the cross groove through the cross pin to drive the rotating shaft to rotate, and meanwhile, the driving shaft and the cross groove can move up and down relatively. The inner cylinder body and the torque force adjusting cap are provided with shaft holes, and the rotating shaft penetrates through the shaft holes, so that the connection between the rotating shaft and the driving shaft is not interfered, and the driving block can rotate around the shaft center.

Furthermore, the department is provided with the centering post in the middle of the bottom of drive block, the bottom border of drive block is provided with initiative wave curved surface, be provided with centering hole on the driven piece, the upper portion of driven piece is provided with driven wave curved surface, the bottom of driven piece is provided with the screens boss, the centering post inserts in the centering hole. The driving wavy curved surface is used for being combined with the driven wavy curved surface to achieve the effect of controlling the magnitude of the torque force, the larger the pressure of the torque force control ejection column is, the deeper the combination of the wavy curved surfaces on the driving block and the driven block is, and the larger the generated torque force is; the centering column is used for being combined with the centering hole of the driven block, so that the driving block and the driven block rotate around the same rotating axis; the clamping boss is used for clamping the driven block in a gap between the outer barrel and the inner barrel, so that the driven block cannot move up and down in the inner barrel.

Further, the bottom of driven piece is provided with the erection column, be provided with vertical mounting groove on the erection column, the inside of erection column is hollow structure, the outer wall of erection column is provided with the screw thread, the first card of electricity batch is gone into in the erection column and is locked through the chucking ring. The electric screwdriver head is required to be used for the installation device, threads are arranged on the outer surface of the electric screwdriver head, and the electric screwdriver head is locked on the driven block through the electric screwdriver head clamping ring after the electric screwdriver head is installed in the installation hole.

Furthermore, go up the lid and include apron, grab handle and slide-bar, the grab handle is located between apron and the slide-bar, be provided with circular telegram switch and guide way on the grab handle, be provided with the wire guide on the apron, the side of apron is provided with the connection piece, is provided with the connecting hole on the connection piece, is connected with the control box at connecting hole department through the bolt, slide-bar upper portion threaded connection has the hood, be provided with the slip through-hole on the fixing base, the slide-bar passes the slip through-hole, the hood is located the top of nail seat, the jacking spring housing just is located between fixing base and the hood on the slide-bar.

Furthermore, four driving assembly through holes are formed in the control box, four rotary driving assemblies are arranged and are respectively installed at the driving assembly through holes, the number of the motors is two, two motor grooves are formed in the control box, the motors are installed in the motor grooves, and each motor is in transmission connection with the two rotary driving assemblies. The mounting positions of the four screws on the radiator are adapted, and the four screws are synchronously mounted at a time. The mounting plate is arranged in the control box and is connected with the control box and the cover plate through screws, a driving assembly shaft hole and a motor shaft hole are formed in the mounting plate, the mounting plate is mainly used for fixing the driving shaft and the driving gear, the driving shaft and the driving gear are enabled not to move along with the up-down movement of the driving block, the driving gear, the gear belt and the motor gear can be kept on the same horizontal plane, the driving assembly shaft hole is used for penetrating through the driving shaft, and the motor shaft hole is used for penetrating through a motor rotating shaft.

According to the technical scheme, the invention has the following advantages:

this scheme provides a screw lock attaches device, can be at the same time, the screw lock attaches all around to the radiator simultaneously on same horizontal plane, the lock attaches process radiator level and acts on CPU on the surface, it is inhomogeneous to avoid current order lock to attach the screw to lead to the radiator atress all around, extrusion CPU produces stress, there is crowded bad CPU's risk, and avoid current order lock to attach the screw and cause the radiator perk can't aim at the screw hole, improvement production efficiency reduction in production cost. In addition, because the electric screwdriver head is completely fixed on the device, the vertical and horizontal movements of the electric screwdriver head are controlled by the device, so that the abnormal condition that the electric screwdriver head bumps the material due to gun jumping of the electric screwdriver head in the existing manual lock is avoided.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description will be briefly introduced, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

Fig. 1 and 2 are schematic views of a heat sink in the background art of the present invention.

Fig. 3 is a schematic structural diagram of an embodiment of the present invention.

Fig. 4 is a schematic structural diagram of the inside of the control box in the embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a fixing base according to an embodiment of the invention.

Fig. 6 is a schematic structural diagram of an upper cover body in the embodiment of the present invention.

Fig. 7 is a schematic structural diagram of a control box according to an embodiment of the present invention.

Fig. 8 is a schematic structural diagram of a rotary driving assembly according to an embodiment of the present invention.

Fig. 9 is a schematic structural view of the rotary driving assembly shown in a split manner according to the embodiment of the present invention.

Fig. 10 is a schematic structural view of an outer cylinder according to an embodiment of the present invention.

Fig. 11 is a side view of the bottom of the outer cylinder in an embodiment of the present invention.

Fig. 12 is a schematic structural view of an inner cylinder according to an embodiment of the present invention.

FIG. 13 is a schematic structural diagram of a driving block according to an embodiment of the present invention.

Fig. 14 is a schematic structural view of a torque control jack post according to an embodiment of the present invention.

FIG. 15 is a schematic diagram of a follower block in accordance with an embodiment of the present invention.

Fig. 16 is a schematic structural diagram of a torque adjustment assembly according to an embodiment of the present invention.

FIG. 17 is a schematic view of a mounting plate according to an embodiment of the present invention.

FIG. 18 is a schematic view of the mounting plate cooperating with the rotational drive assembly in accordance with an embodiment of the present invention.

In the figure, 1, a fixed seat, 2, a jacking spring, 3, an upper cover body, 4, a mounting plate, 5, a control box, 6, a belt, 7, a motor, 8, a rotary driving component, 9, a sliding through hole, 10, a top cap, 11, a top cap threaded hole, 12, a sliding shaft, 13, an energizing switch, 14, a cover plate, 15, a grab handle, 16, a wire guide groove, 17, a connecting sheet, 18, a driving component through hole, 19, a motor groove, 20, a driving wheel, 21, a torque adjusting cap, 22, an outer cylinder body, 23, a clamping ring, 24, an electric screwdriver head, 25, a driving shaft, 26 and a rotating shaft, 27, a torsion control spring, 28, a torsion control ejection column, 29, a driving block, 30, a driven block, 31, a bayonet, 32, a fixed arm, 33, a shaft hole, 34, an inner cylinder body, 35, a clamping arm, 36, an ejection column mounting hole, 37, a cross groove, 38, a centering column, 39, a driving wavy curved surface, 40, an extrusion surface, 41, an ejection convex surface, 42, a centering hole, 43, a driven wavy curved surface, 44, a clamping boss, 45, a mounting column, 46, a mounting groove, 47, an extrusion groove, 48, a driving component shaft hole, 49 and a motor shaft hole.

Detailed Description

In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the present embodiment, and it is apparent that the embodiments described below are only a part of embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the scope of protection of this patent.

As shown in fig. 3 to 18, this embodiment provides a screw locking device, which includes a fixing base 1, an upper cover 3 and a control box 5, the upper cover 3 is connected to the fixing base 1, a jacking spring 2 is disposed between the upper cover 3 and the fixing base 1 to enable the upper cover 3 to be reset in a vertical direction, the upper cover 3 is fastened to the upper portion of the control box 5, at least two rotation driving assemblies 8 are disposed in the control box 5, the rotation driving assemblies 8 are powered by a motor 7, an electric screwdriver head 24 is mounted on each rotation driving assembly 8, the rotation driving assemblies 8 can drive the electric screwdriver head 24 to rotate, and the electric screwdriver head 24 extends out of the control box 5. In this scheme, be provided with four drive assembly through-holes 18 in the control box 5, rotatory drive assembly 8 is provided with four, installs respectively in drive assembly through-hole 18 department, and motor 7 has two, is provided with two motor grooves 19 in the control box 5, and motor 7 installs in motor groove 19, and every motor 7 is connected with two rotatory drive assembly 8 transmissions. The mounting positions of the four screws on the radiator are adapted, and the four screws are synchronously mounted at a time.

The rotary driving assembly 8 comprises a driving wheel 20, a driving shaft 25, a driving block 29 and a driven block 30, the driving wheel 20 is in transmission connection with the motor 7, the driving shaft 25 is connected with the driving wheel 20 and can rotate along with the driving wheel 20, the driving shaft 25 is connected with the driving block 29, the driving block 29 can be clamped with the driven block 30, the electric screwdriver head 24 is mounted on the driven block 30, a torque adjusting assembly is arranged on the driving block 29, in the scheme, a belt wheel is mounted on the motor 7, the driving wheel 20 is also a belt wheel, the two belt wheels are connected through a belt 6, the driving wheel 20 transmits power output by the motor 7 to the driving shaft 25, the driving shaft 25 transmits power transmitted by the driving wheel to the driving block 29, the driving block 29 is clamped with the driven block 30 under the extrusion of the torque adjusting assembly and transmits the power transmitted by the driving shaft 25 to the driven block 30, and then the driven block 30 transmits the power transmitted by the driving block 29 to the electric screwdriver head 24, so that the electric screwdriver head 24 has torque for locking. The torsion adjusting assembly comprises a plurality of torsion control support posts 28, a plurality of torsion control springs 27 and a torsion adjusting cap 21, the torsion control support posts 28 are located above the driving block 29, the torsion control support posts 28 are arranged at intervals, the torsion control springs 27 are sleeved on the torsion control support posts 28, the torsion adjusting cap 21 is matched with the torsion control springs 27 and can adjust the stretching amount of the torsion control springs 27, the torsion adjusting cap 21 is used for adjusting and controlling the stretching amount of the torsion control springs 27, when the adjusting cap moves downwards, the spring compression amount is increased, the torsion control support posts 28 press the driving block 29 downwards under the extrusion action of the springs, so that the driving block 29 and the driven block 30 are extruded more tightly, the torsion value transmitted between the driving block 29 and the driven block 30 is increased, and vice versa. The torque adjusting cap 21 is connected with the outer cylinder 22 through a thread, the driving block 29 is arranged in the outer cylinder 22, and the outer cylinder 22 is provided with a fixing arm 32 which is used for being combined with the inner wall of the control box 5 and fixing the outer cylinder on the inner wall of the control box 5 through a fixing hole and a screw action. An inner cylinder body 34 capable of moving up and down is arranged in the outer cylinder body 22, a top wall of the inner cylinder body 34 is provided with a top column mounting hole 36, an annular pushing groove 47 is formed in the torsion adjusting cap 21, the torsion control top column 28 penetrates through the top column mounting hole 36 and then is inserted into the pushing groove 47, and the torsion control spring 27 is located below the pushing groove 47. The specific scheme is that the upper part of the outer wall of the outer barrel 22 is provided with threads and a bayonet 31, the inner barrel 34 is provided with a clamping arm 25, the clamping arm 25 is positioned in the bayonet 31, the inner wall of the torsion adjusting cap 21 is provided with threads, the torsion adjusting cap 21 is sleeved on the outer wall of the outer barrel 22, the torsion adjusting cap 21 is positioned above the clamping arm 25 and moves up and down by screwing the torsion adjusting cap 21, so that the control spring changes in the telescopic length of the torsion control jack-post 28 to generate different extrusion forces, and the effect of adjusting the torsion force is achieved. The torque control jack 28 is provided with a limit boss, the lower part of the torque control spring 27 is abutted to the limit boss, the bottom of the torque control jack 28 is provided with a convex top surface 41, the upper part of the driving block 29 is provided with a squeezing surface 40, the convex top surface 41 is matched with the squeezing surface 40, the squeezing surface 40 is used for being combined with the convex top surface 41 of the torque control jack 28, and the downward thrust of the torque control jack 28 is transferred to the driving block 29. The middle of the bottom of the driving block 29 is provided with a centering column 38, the periphery of the bottom of the driving block 29 is provided with a driving wavy curved surface 39, the driven block 30 is provided with a centering hole 42, the upper part of the driven block 30 is provided with a driven wavy curved surface 43, the bottom of the driven block 30 is provided with a clamping boss 44, the centering column 38 is inserted into the centering hole 42, the driving wavy curved surface 39 is used for being combined with the driven wavy curved surface 43 to achieve the effect of controlling the magnitude of torque force, the larger the pressure of the torque force control ejection column 28 is, the deeper the combination of the wavy curved surfaces on the driving block 29 and the driven block 30 is, and the larger the torque force is generated; the centering column 38 is used for combining with the centering hole 42 of the driven block 30 to enable the driving block 29 and the driven block 30 to rotate around the same rotating shaft 26; the retaining boss 44 is used for retaining the driven block 30 in the gap between the outer cylinder 22 and the inner cylinder 34, so that the driven block 30 cannot move up and down in the inner cylinder. The bottom of driven piece 30 is provided with erection column 45, is provided with vertical mounting groove 46 on the erection column 45, and the inside of erection column 45 is hollow structure, and the outer wall of erection column 45 is provided with the screw thread, and electricity is criticized first 24 card and is gone into in erection column 45 and through chucking ring 23 locking for the required electricity of installation device is criticized first 24, and the external surface has the screw thread, criticizes first 24 chucking ring 23 with electricity and locks electricity criticize head 24 on driven piece 30 with electricity after 24 installs into the mounting hole with electricity criticizing head 24.

Wherein, go up lid 3 including apron 14, grab handle 15 and slide-bar 12, grab handle 15 is located between apron 14 and slide-bar 12, be provided with circular telegram switch 13 and guide way on grab handle 15, be provided with the wire guide on the apron 14, the side of apron 14 is provided with connection piece 17, be provided with the connecting hole on the connection piece 17, be connected with control box 5 at connecting hole department through the bolt, 12 upper portion threaded connection of slide-bar has hood 10, be provided with slip through-hole 9 on fixing base 1, slide-bar 12 passes slip through-hole 9, hood 10 is located the top of nail seat, jacking spring 2 covers on slide-bar 12 and is located between fixing base 1 and the hood 10.

In addition, a mounting plate 4 is arranged in the control box 5, the mounting plate 4 is connected with the control box 5 and the cover plate 14 through screws, a driving assembly shaft hole 48 and a motor shaft hole 49 are formed in the mounting plate 4, the mounting plate 4 is mainly used for fixing the driving shaft 25 and the driving gear, the driving shaft 25 and the driving gear are enabled not to move along with the up-and-down movement of the driving block 29, the driving gear, the gear belt and the motor 7 gear can be kept on the same horizontal plane, the driving assembly shaft hole 48 is used for penetrating through the driving shaft 25, and the motor shaft hole 49 is used for penetrating through the rotating shaft 26 of the motor 7.

The working principle is as follows: A. according to the position of the main board radiator required to be locked in production, the height and the position of the device are adjusted and fixed; B. the electric screwdriver head 24 is arranged on an installation column 45 at the bottom of the driven block 30, the handle 15 of the upper cover body 3 is held and pressed downwards, the screw on the radiator is confirmed to be locked and attached in place when the lowest end is pressed, and then the conducting wire is connected to the motor 7 in the device body through the switch, so that the motor 7 in the device body is connected with a production environment circuit; C. placing four screws onto the screwdriver head 24; D. holding the grab handle 15 of the upper cover body 3 of the column to press the whole device downwards, pressing the switch on the grab handle 15 to electrify the device to start locking the screw when the screw on the electric screwdriver head 24 is inserted into the screw hole of the radiator, and continuously pressing the grab handle 15 downwards until the electric screwdriver head 24 does not rotate any more; E. releasing the device handle 15, the device rises to the initial height under the action of the jacking spring 2; F. and taking out the PCBA and the radiator assembly which are well locked, putting in a new PCBA and a radiator which need to be locked, and entering the next circulation locking operation from the step C.

The terms "upper", "lower", "outside", "inside", and the like in the description and claims of the present invention and the above-described drawings (if any) are used for distinguishing relative positions without necessarily being construed qualitatively. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a screw lock attaches device, its characterized in that includes the fixing base, goes up lid and control box, go up the lid connect in the fixing base, go up the lid with it can make to be provided with the jacking spring between the fixing base go up the lid and reset in vertical direction, it arrives to go up the lid lock the upper portion of control box, be provided with two at least rotary driving subassemblies in the control box, rotary driving subassembly provides power by the motor, install the electricity on the rotary driving subassembly and criticize the head, rotary driving subassembly can drive the electricity is criticized the head and is rotated, the electricity is criticized the head and is stretched out the control box.

2. The screw locking device of claim 1, wherein the rotary driving assembly comprises a driving wheel, a driving shaft, a driving block and a driven block, the driving wheel is in transmission connection with the motor, the driving shaft is connected with the driving wheel and can rotate along with the driving wheel, the driving shaft is connected with the driving block, the driving block can be clamped with the driven block, the electric screwdriver bit is mounted on the driven block, and the driving block is provided with a torsion adjusting assembly.

3. The screw locking device of claim 2, wherein the torsion adjusting assembly comprises a plurality of torsion control posts, a plurality of torsion control springs and a torsion adjusting cap, the torsion control posts are located above the driving block, the plurality of torsion control posts are arranged at intervals, the torsion control springs are sleeved on the torsion control posts, and the torsion adjusting cap is matched with the torsion control springs and can adjust the stretching amount of the torsion control springs.

4. The screw locking device according to claim 3, wherein the torque adjusting cap is threadedly connected to an outer cylinder, the driving block is mounted in the outer cylinder, an inner cylinder capable of moving up and down is disposed in the outer cylinder, a top wall of the inner cylinder is provided with a top post mounting hole, an annular pushing groove is disposed in the torque adjusting cap, the torque control top post passes through the top post mounting hole and then is inserted into the pushing groove, and the torque control spring is disposed below the pushing groove.

5. The screw locking device of claim 3 or 4, wherein the torque control post is provided with a limit boss, the lower part of the torque control spring abuts against the limit boss, the bottom of the torque control post is provided with a top convex surface, the upper part of the driving block is provided with a pressing surface, and the top convex surface is matched with the pressing surface.

6. The screw locking device according to claim 3 or 4, wherein a rotation shaft is provided at an upper portion of the driving block, a cross recess is provided on the rotation shaft, a cross pin is provided on the driving shaft, the cross pin is engaged with the cross recess, shaft holes are provided on the inner cylinder and the torque adjusting cap, and the rotation shaft passes through the shaft holes.

7. The screw locking device according to any one of claims 1 to 4, wherein a centering post is disposed at the middle of the bottom of the driving block, a driving wavy surface is disposed at the periphery of the bottom of the driving block, a centering hole is disposed on the driven block, a driven wavy surface is disposed at the upper portion of the driven block, a locking boss is disposed at the bottom of the driven block, and the centering post is inserted into the centering hole.

8. The screw locking device according to any one of claims 1 to 4, wherein the driven piece is provided with a mounting post at the bottom, the mounting post is provided with a vertical mounting groove, the mounting post is hollow inside, the mounting post is provided with threads on the outer wall, and the electric screwdriver bit is clamped into the mounting post and locked by the clamping ring.

9. The screw locking device according to any one of claims 1 to 4, wherein the upper cover body comprises a cover plate, a handle and a sliding shaft, the handle is located between the cover plate and the sliding shaft, the handle is provided with a power switch and a guide groove, the cover plate is provided with a wire guide hole, a connecting sheet is arranged on a side surface of the cover plate, the connecting sheet is provided with a connecting hole, the upper portion of the sliding shaft is in threaded connection with a top cap, the fixing base is provided with a sliding through hole, the sliding shaft passes through the sliding through hole, the top cap is located above the screw base, and the jacking spring is sleeved on the sliding shaft and located between the fixing base and the top cap.

10. The screw locking device according to any one of claims 1 to 4, wherein four driving assembly through holes are provided in the control box, four rotating driving assemblies are provided and are respectively mounted at the driving assembly through holes, the number of the motors is two, two motor slots are provided in the control box, the motors are mounted in the motor slots, and each motor is in transmission connection with two rotating driving assemblies.