A screw driving device and method

Abstract

The application discloses a screw driving device and method thereof, comprising a base, the top end of which is provided with a screw driving mechanism, the top end of the base is provided with a conveying and clamping device, the conveying and clamping device comprises a clamping mechanism, a protection mechanism and a positioning mechanism, the clamping mechanism is arranged on the top end of the base, the protection mechanism is arranged on the top end of the base, and the positioning mechanism is connected with the clamping mechanism. The clamping mechanism, the protection mechanism and the positioning mechanism are matched and arranged, so that when the workpieces on one material plate are processed through the two material plates on the clamping mechanism, the workpieces on the other material plate can be installed and dismounted, the protection mechanism can protect the workers during installation and dismounting, and the positioning mechanism can be synchronously moved when the clamping assembly is used, so that the clamping and fixing are more simple and convenient, the screw driving efficiency is improved, and the safety of the workers is protected.

Description

Technical Field

[0001] This invention relates to the field of screw-driving device technology, and particularly to a screw-driving device and method thereof. Background Technology

[0002] When screwing in workpieces, screw-in devices are generally used to tighten the screws, and the operation is automated by using an electric screwdriver bit.

[0003] The existing automatic screw-driving device adopts a single-station setting, which can only install one workpiece at a time. After the screw is driven, the machine can only continue to operate after the screwed workpiece is removed and replaced with a new workpiece. When replacing the new workpiece, the screw-driving machine is in standby mode, which generates a lot of waiting time and results in low production efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a screw-driving device and method to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a screw-driving device, comprising a base, wherein a screw-driving mechanism is provided at the top of the base;

[0006] The top of the base is provided with a conveying clamping device;

[0007] The conveying clamping device includes a clamping mechanism, a protective mechanism, and a positioning mechanism. The clamping mechanism is located at the top of the base, the protective mechanism is located at the top of the base, the positioning mechanism is connected to the clamping mechanism, and the clamping mechanism and the protective mechanism cooperate with each other.

[0008] Preferably, the clamping mechanism includes a material plate, a sliding plate, a gear, a rack, a pre-clamping assembly, and a clamping assembly. The top of the base has two sliding grooves, the sliding plate is slidably inserted into the inner cavity of the sliding groove, the material plate is fixedly connected to the top of the sliding plate, the gear is rotatably connected to the base via a rotating shaft, multiple racks are fixedly connected between multiple material plates, and all multiple racks are meshed with the gear. The pre-clamping mechanism is disposed inside the material plate, and the clamping assembly is disposed inside the material plate.

[0009] Preferably, the pre-clamping mechanism includes a clamping plate and a first compression spring. The top of the material plate has multiple grooves. The clamping plate is slidably inserted into the inner cavity of the groove. The first compression spring is located inside the groove. The cross-section of both the clamping plate and the groove is T-shaped.

[0010] Preferably, the clamping assembly includes a bidirectional screw, a slider, and a clamping plate. The top of the material plate has a clamping groove communicating with the sliding plate. The bidirectional screw is rotatably inserted into the inner wall of the clamping groove. Multiple sliders are threadedly inserted into the bidirectional screw. The clamping plate is fixedly connected to the top of the slider. The positioning mechanism is connected to the slider.

[0011] Preferably, the protective mechanism includes a mounting frame, a fixing plate, a protective plate, and an elastic component. The mounting frame is fixedly connected to the top of the base, the fixing plate is fixedly connected to the inside of the mounting frame, the bottom end of the fixing plate has two rotating grooves, the protective plate is rotatably connected to the inner wall of the rotating grooves through a rotating shaft, the fixing plate has multiple elastic grooves, and the elastic component is located inside the elastic grooves.

[0012] Preferably, the elastic component includes a slide rod, a pressing plate, and a second compression spring. The slide rods are all fixedly connected inside the elastic groove. The pressing plate is slidably inserted and connected to the slide rods. The second compression spring is sleeved on the outside of the slide rods. One end of the second compression spring is fixedly connected to the pressing plate, and the other end of the second compression spring is fixedly connected to the top of the inner wall of the elastic groove.

[0013] Preferably, the positioning mechanism includes a trapezoidal block, a positioning block, a connecting block, and a third compression spring. Multiple trapezoidal blocks are fixedly connected to both sides of multiple sliders. Through slots are formed on both sides of the inner wall of the slide groove. The positioning block is slidably inserted into the inner cavity of the through slot. Multiple connecting blocks are fixedly connected to both sides of the multiple positioning blocks. Connecting slots are formed on both sides of the inner wall of the through slot. The connecting block is slidably inserted into the inner cavity of the connecting slot. One end of the third compression spring is fixedly connected to the connecting block, and the other end of the third compression spring is fixedly connected to the inner wall of the connecting slot. The trapezoidal block and the positioning block cooperate with each other. Positioning slots are formed on both sides of the inner wall of the slide groove, and the positioning block cooperates with the inner cavity of the positioning slot.

[0014] Preferably, the screw-driving mechanism includes a first motor, a threaded rod, a sliding rod, a moving frame, and a moving component. The first motor is fixedly installed on one side of the base, and the first motor and its output end are connected to the threaded rod for transmission. Multiple mounting seats are fixedly connected to both sides of the base. The threaded rod is rotatably inserted into two of the mounting seats, the sliding rod is fixedly connected to the other two mounting seats, the moving frame is threaded into the threaded rod, the moving frame is slidably inserted into the sliding rod, and the moving component is connected to the moving frame.

[0015] Preferably, the moving assembly includes a second motor, a lead screw, a sliding block, and an electric screwdriver bit. The second motor is fixedly installed on one side of the moving frame, and the output end of the second motor is connected to the lead screw via a transmission. The lead screw is rotatably inserted into the inner wall of the moving frame. The sliding block is threadedly inserted into the lead screw, and the electric screwdriver bit is fixedly installed at the bottom end of the sliding block.

[0016] The present invention also provides a method of using the screw-driving device, including the following specific steps:

[0017] Step 1: When using this device, the workpiece can be placed between two clamping plates. Under the elastic force of the first compression spring, it can be kept in the center position. Then, by pushing the material plate, the clamping components on the material plate squeeze the protective plate. After the protective plate rotates, it can be reset to a vertical position in time under the elastic force of the squeezing plate.

[0018] Step 2: During the pushing process, due to the meshing of the gear and rack, the other material plate will retract to the worker's position. At this time, the bidirectional screw can be rotated to make the two sliders drive the clamping plates to move relative to each other, thereby clamping the workpiece. At the same time, the movement of the sliders can drive the trapezoidal block to move, and through the inclined surface to squeeze the positioning block, the positioning blocks located on both sides of the slide groove are squeezed to both sides and intersect with the positioning groove, so that the workpiece is positioned and the material plate is also positioned.

[0019] Step 3: After positioning, the first and second motors can be started by an external controller to rotate the threaded rod and lead screw. This, in turn, drives the electric screwdriver bit to move to multiple positions via the moving frame and slider, thereby performing screw-driving operations on the workpiece. At the same time, the worker can disassemble and install the workpiece on the retracted material plate for the next processing.

[0020] The technical effects and advantages of this invention are as follows:

[0021] (1) The present invention utilizes a combination of clamping mechanism, protective mechanism and positioning mechanism, so that when the workpiece on one material plate is being processed, the workpiece on the other material plate can be installed and removed through the two material plates on the clamping mechanism. The protective mechanism can protect the workers who are installing and removing the workpiece during processing. The positioning mechanism can move synchronously when the clamping components are in use, making clamping and fixing simpler and more convenient, thereby improving the efficiency of screwing while protecting the safety of the workers.

[0022] (2) The present invention utilizes a combination of material plate, slide plate, gear, rack, pre-clamping component and clamping component. The pre-clamping component and clamping component can position the workpiece on the material plate. Through the meshing of gear and rack, the workpiece on one material plate can be installed and removed while the workpiece on the other material plate is being processed. This enables the alternating use of two workstations, reduces the waiting time of the screw-driving device when changing workpieces, and improves screw-driving efficiency.

[0023] (3) The present invention utilizes a combination of mounting bracket, fixing plate, protective plate and elastic component. When screwing the workpiece, the protective plate can be kept vertical under the elastic force of the elastic component. This not only does not affect the movement of the material plate, but also effectively prevents the screw from flying off and causing injury to the workers.

[0024] (4) The present invention utilizes the combination of trapezoidal block, positioning block, connecting block and third compression spring. When the pre-clamping mechanism clamps the workpiece, the material plate can be pushed to the direction of the electric screwdriver head. After passing through the protective plate, the bidirectional screw is rotated so that the slider drives the clamping plate to clamp the workpiece. At the same time, the trapezoidal block can squeeze the positioning block, so that the positioning block can be inserted into the positioning groove. Thus, the bidirectional screw is rotated to achieve double fixation, which is convenient to use. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0026] Figure 2 This is a top view of the clamping mechanism of the present invention.

[0027] Figure 3 This is a schematic diagram of the internal structure of the clamping mechanism of the present invention from the front.

[0028] Figure 4 This is a schematic diagram of the overall internal structure of the present invention.

[0029] Figure 5 For the present invention Figure 1 Enlarged structural diagram at point A in the middle.

[0030] Figure 6 For the present invention Figure 3 Enlarged structural diagram at point B.

[0031] Figure 7 This is a schematic diagram of the internal structure of the screw-driving mechanism of the present invention from the front.

[0032] Figure 8 This is a top view of the internal structure of the base of the present invention.

[0033] Figure 9This is a top view of the internal structure of the positioning mechanism of the present invention.

[0034] Figure 10 For the present invention Figure 9 Enlarged structural diagram at point C.

[0035] In the diagram: 1. Base; 2. Screw-driving mechanism; 21. First motor; 22. Threaded rod; 23. Sliding rod; 24. Moving frame; 25. Moving assembly; 251. Second motor; 252. Lead screw; 253. Sliding block; 254. Electric screwdriver bit; 3. Clamping mechanism; 31. Material plate; 32. Slide plate; 33. Gear; 34. Rack; 35. Pre-clamping assembly; 351. Clamping plate; 352. First compression spring; 36. Clamping assembly; 361. Bidirectional screw; 362. Slider; 363. Clamping plate; 4. Protective mechanism; 41. Mounting frame; 42. Fixing plate; 43. Protective plate; 44. Elastic assembly; 441. Sliding rod; 442. Extrusion plate; 443. Second compression spring; 5. Positioning mechanism; 51. Trapezoidal block; 52. Positioning block; 53. Connecting block; 54. Third compression spring. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] This invention provides, for example Figure 1-10 A screw-driving device and method are shown, including a base 1, with a screw-driving mechanism 2 provided at its top;

[0038] A conveying clamping device is provided at the top of the base 1;

[0039] The conveying clamping device includes a clamping mechanism 3, a protective mechanism 4, and a positioning mechanism 5. The clamping mechanism 3 is located at the top of the base 1, the protective mechanism 4 is located at the top of the base 1, and the positioning mechanism 5 is connected to the clamping mechanism 3. The clamping mechanism 3 and the protective mechanism 4 cooperate with each other.

[0040] Furthermore, the clamping mechanism 3 includes a material plate 31, a sliding plate 32, a gear 33, a rack 34, a pre-clamping assembly 35, and a clamping assembly 36. The top of the base 1 has two sliding grooves. The sliding plate 32 is slidably inserted into the inner cavity of the sliding groove. The material plate 31 is fixedly connected to the top of the sliding plate 32. The gear 33 is rotatably connected to the base 1 through a rotating shaft. Multiple racks 34 are fixedly connected between multiple material plates 31. All multiple racks 34 are meshed with the gear 33. The pre-clamping mechanism is located inside the material plate 31. The clamping assembly 36 is located inside the material plate 31. By utilizing the meshing of the gear 33 and the rack 34, one material plate 31 can be fed in and the other can be discharged. Thus, when the workpiece on one material plate 31 is being processed, the other material plate 31 can be installed and disassembled. This enables the alternating use of two workstations, reduces the waiting time of the screw-driving device when changing workpieces, and improves screw-driving efficiency.

[0041] Furthermore, the pre-clamping assembly 35 includes a clamping plate 351 and a first compression spring 352. The top of the material plate 31 has multiple grooves. The clamping plate 351 is slidably inserted into the inner cavity of the groove. The first compression spring 352 is located inside the groove. The cross-sections of the clamping plate 351 and the groove are both T-shaped. The first compression spring 352 is always in a compressed state. Thus, the elastic force of the first compression spring 352 on the clamping plate 351 can be used to pre-clamp the workpiece on the material plate 31, which facilitates subsequent positioning operations.

[0042] Furthermore, the clamping assembly 36 includes a bidirectional screw 361, a slider 362, and a clamping plate 363. The top of the material plate 31 has a clamping groove communicating with the slide plate 32. The bidirectional screw 361 is rotatably inserted into the inner wall of the clamping groove. Multiple sliders 362 are threadedly inserted into the bidirectional screw 361. The clamping plate 363 is fixedly connected to the top of the slider 362. The positioning mechanism 5 is connected to the slider 362. By rotating the bidirectional screw 361, the bidirectional screw 361 drives the two sliders 362 to move relative to each other, thereby realizing the clamping operation of the workpiece. In conjunction with the pre-clamping assembly 35, the workpiece is centered and clamped on the material plate 31, which facilitates the subsequent screwing operation.

[0043] Furthermore, the protective mechanism 4 includes a mounting bracket 41, a fixing plate 42, a protective plate 43, and an elastic component 44. The mounting bracket 41 is fixedly connected to the top of the base 1, and the fixing plate 42 is fixedly connected to the inside of the mounting bracket 41. The bottom end of the fixing plate 42 has two rotating grooves. The protective plate 43 is rotatably connected to the inner wall of the rotating grooves through a rotating shaft. The fixing plate 42 has multiple elastic grooves, and the elastic component 44 is located inside the elastic grooves. Both the fixing plate 42 and the protective plate 43 are made of transparent material, which facilitates timely observation of the screw-driving operation and prevents accidents.

[0044] Furthermore, the elastic component 44 includes a sliding rod 441, a pressing plate 442, and a second compression spring 443. Multiple sliding rods 441 are fixedly connected inside the elastic groove. The pressing plate 442 is slidably interlocked with the multiple sliding rods 441. The second compression spring 443 is sleeved on the outside of the sliding rods 441. One end of the second compression spring 443 is fixedly connected to the pressing plate 442, and the other end is fixedly connected to the top of the inner wall of the elastic groove. The second compression spring 443 is always in a compressed state, thus the pressing plate 442 can limit the movement of the protective plate 43. When the clamping component 36 presses the protective plate 43, causing it to rotate, the protective plate 43 can promptly return to a vertical position under the pressure of the pressing plate 442. This not only does not affect the movement of the material plate 31 but also effectively prevents screws from flying off and injuring workers, thus protecting them.

[0045] Furthermore, the positioning mechanism 5 includes trapezoidal blocks 51, positioning blocks 52, connecting blocks 53, and a third compression spring 54. Multiple trapezoidal blocks 51 are fixedly connected to both sides of multiple sliders 362. Through slots are provided on both sides of the inner wall of the slide groove. The positioning blocks 52 are slidably inserted into the inner cavity of the through slots. Multiple connecting blocks 53 are fixedly connected to both sides of the multiple positioning blocks 52. Connecting slots are provided on both sides of the inner wall of the through slots. The connecting blocks 53 are slidably inserted into the inner cavity of the connecting slots. One end of the third compression spring 54 is fixedly connected to the connecting block 53, and the other end of the third compression spring 54 is fixedly connected to the inner wall of the connecting slot. The positioning block 51 and the positioning block 52 cooperate with each other. Positioning grooves are opened on both sides of the inner wall of the slide. The positioning block 52 cooperates with the inner cavity of the positioning groove. After the material plate 31 is sent to the position of the electric screwdriver head 254, the material can be centered and clamped by rotating the bidirectional screw 361. At the same time, the movement of the slider 362 can drive the trapezoidal block 51 to move. By pressing the positioning block 52 with the inclined surface, the positioning blocks 52 located on both sides of the slide are pressed to both sides and intersect with the positioning groove. This makes the workpiece and the material plate 31 positioned at the same time, saving the time of two positioning operations, thereby indirectly improving the processing efficiency.

[0046] Furthermore, the screw-driving mechanism 2 includes a first motor 21, a threaded rod 22, a sliding rod 23, a moving frame 24, and a moving assembly 25. The first motor 21 is fixedly installed on one side of the base 1, and its output end is connected to the threaded rod 22. Multiple mounting seats are fixedly connected to both sides of the base 1. The threaded rod 22 is rotatably connected to two of the mounting seats, and the sliding rod 23 is fixedly connected to the other two mounting seats. The moving frame 24 is threadedly connected to the threaded rod 22 and slidably connected to the sliding rod 23. The moving assembly 25 is connected to the moving frame 24 and includes a second motor 251 and a lead screw 252. The system includes a sliding block 253 and an electric screwdriver bit 254. A second motor 251 is fixedly installed on one side of the movable frame 24. The output end of the second motor 251 is connected to the lead screw 252. The lead screw 252 is rotatably inserted into the inner wall of the movable frame 24. The sliding block 253 is threadedly inserted into the lead screw 252. The electric screwdriver bit 254 is fixedly installed at the bottom end of the sliding block 253. The first motor 21, the second motor 251, and the electric screwdriver bit 254 are all electrically connected to an external power supply through an external controller. Under the control of the controller, the electric screwdriver bit 254 can move in multiple positions through the first motor 21 and the second motor 251, thereby facilitating the screw-driving operation on the workpiece.

[0047] How to use this invention:

[0048] When using this device, the workpiece can be placed between two clamping plates 351. Under the elastic force of the first compression spring 352, it can be kept in a centered position. By pushing the material plate 31, the clamping assembly 36 presses against the protective plate 43. After the protective plate 43 rotates, it can promptly return to a vertical position under the elastic force of the pressing plate 442. During the pushing process, due to the meshing of the gear 33 and the rack 34, the other material plate 31 will retract to the worker's position. At this time, the bidirectional screw 361 can be rotated, causing the two sliders 362 to drive the clamping plate 363 to move relative to each other, thereby clamping the workpiece. Simultaneously, the movement of slider 362 can drive trapezoidal block 51 to move, and through the inclined surface pressing positioning block 52, the positioning blocks 52 located on both sides of the slide groove are pressed to both sides and intersect with the positioning groove, so that the workpiece is positioned and the material plate 31 is also positioned. At this time, the first motor 21 and the second motor 251 can be started by the external controller to make the thread rod 22 and lead screw 252 rotate, thereby driving the electric screwdriver bit 254 to move in multiple positions through the moving frame 24 and sliding block 253, so as to perform screwing operation on the workpiece. At the same time, the worker can disassemble and install the workpiece on the retracted material plate 31 for the next processing.

[0049] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A screwing device, comprising: a base (1) provided with a screwing mechanism (2) at the top end; characterized in that the top end of the base (1) is provided with a conveying and clamping device; the conveying and clamping device comprises a clamping mechanism (3), a protection mechanism (4) and a positioning mechanism (5), the clamping mechanism (3) is arranged at the top end of the base (1), the protection mechanism (4) is arranged at the top end of the base (1), the positioning mechanism (5) is connected with the clamping mechanism (3), and the clamping mechanism (3) and the protection mechanism (4) are matched with each other; the clamping mechanism (3) comprises a material plate (31), a sliding plate (32) and a clamping assembly (36), two sliding grooves are formed at the top end of the base (1), the sliding plate (32) is slidably connected with the inner cavity of the sliding groove, the material plate (31) is fixedly connected to the top end of the sliding plate (32), and the clamping assembly (36) is arranged in the material plate (31); the clamping assembly (36) comprises a bidirectional screw rod (361), a sliding block (362) and a clamping plate (363), a clamping groove is formed at the top end of the material plate (31) and communicates with the sliding plate (32), the bidirectional screw rod (361) is rotatably connected with the inner wall of the clamping groove, a plurality of sliding blocks (362) are threadedly connected with the bidirectional screw rod (361), the clamping plate (363) is fixedly connected to the top end of the sliding block (362), and the positioning mechanism (5) is connected with the sliding block (362); the positioning mechanism (5) comprises a trapezoidal block (51), a positioning block (52), a connecting block (53) and a third compression spring (54), a plurality of trapezoidal blocks (51) are fixedly connected to the two sides of the plurality of sliding blocks (362), the two sides of the inner wall of the sliding groove are provided with a through groove, the positioning block (52) is slidably connected with the inner cavity of the through groove, a plurality of connecting blocks (53) are fixedly connected to the two sides of the plurality of positioning blocks (52), the two sides of the inner wall of the through groove are provided with a connecting groove, the connecting block (53) is slidably connected with the inner cavity of the connecting groove, one end of the third compression spring (54) is fixedly connected with the connecting block (53), the other end of the third compression spring (54) is fixedly connected with the inner wall of the connecting groove, the trapezoidal block (51) and the positioning block (52) are matched with each other, the two sides of the inner wall of the sliding groove are provided with a positioning groove, and the positioning block (52) and the positioning groove are matched with each other.

2. A screw driving device according to claim 1, wherein the clamping mechanism (3) further comprises a gear (33), a rack (34) and a pre-clamping assembly (35), the gear (33) is rotatably connected with the base (1) through a rotating shaft, a plurality of racks (34) are fixedly connected between a plurality of material plates (31), and the plurality of racks (34) are in meshing connection with the gear (33), and the pre-clamping assembly is arranged in the material plate (31).

3. A screw driving device according to claim 2, wherein The pre-clamping assembly (35) comprises a clamping plate (351) and a first compression spring (352), the top end of the material plate (31) is provided with a plurality of grooves, the clamping plate (351) is slidably connected with the inner cavity of the groove, and the first compression spring (352) is located in the inner cavity of the groove.

4. The screw driving device of claim 1, wherein The protection mechanism (4) comprises a mounting frame (41), a fixed plate (42), a protection plate (43) and an elastic assembly (44), the mounting frame (41) is fixedly connected to the top end of the base (1), the fixed plate (42) is fixedly connected to the inner part of the mounting frame (41), the bottom end of the fixed plate (42) is provided with two rotating grooves, the protection plate (43) is rotatably connected with the inner wall of the rotating groove through a rotating shaft, and the fixed plate (42) is provided with a plurality of elastic grooves, and the elastic assembly (44) is located in the elastic groove.

5. A screw driving device according to claim 4, wherein The elastic assembly (44) comprises a sliding rod (441), an extrusion plate (442) and a second compression spring (443), a plurality of sliding rods (441) are fixedly connected to the inner part of the elastic groove, the extrusion plate (442) is slidably connected with the plurality of sliding rods (441), the second compression spring (443) is sleeved with the outer part of the sliding rod (441), one end of the second compression spring (443) is fixedly connected with the extrusion plate (442), and the other end of the second compression spring (443) is fixedly connected with the top end of the inner wall of the elastic groove.

6. The screw driving device of claim 1, wherein The screw driving mechanism (2) comprises a first motor (21), a threaded rod (22), a sliding rod (23), a moving frame (24) and a moving assembly (25), the first motor (21) is fixedly installed on one side of the base (1), the first motor (21) is in transmission connection with the output end and the threaded rod (22), both sides of the base (1) are fixedly connected with a plurality of mounting seats, the threaded rod (22) is rotatably connected with two of the mounting seats, the sliding rod (23) is fixedly connected with the other two mounting seats, the moving frame (24) is in threaded connection with the threaded rod (22), the moving frame (24) is slidably connected with the sliding rod (23), and the moving assembly (25) is connected with the moving frame (24).

7. A screw driving device according to claim 6, wherein The moving assembly (25) comprises a second motor (251), a lead screw (252), a sliding block (253) and an electric screwdriver head (254), the second motor (251) is fixedly installed on one side of the moving frame (24), the output end of the second motor (251) is in transmission connection with the lead screw (252), the lead screw (252) is rotatably connected with the inner wall of the moving frame (24), the sliding block (253) is in threaded connection with the lead screw (252), and the electric screwdriver head (254) is fixedly installed at the bottom end of the sliding block (253).

8. A method of using a screw driving device according to any one of claims 1-7, characterized in that The specific use steps include: Step one: when using the device, the workpiece can be placed between the two clamping plates (351), under the elastic force of the first compression spring (352), the center position can be guaranteed, so that the material plate (31) can be pushed, the clamping assembly (36) on the material plate (31) extrudes the protection plate (43), so that the protection plate (43) rotates, and the protection plate (43) can reset to vertical state under the elastic force of the extrusion plate (442); Step two: during the pushing process, due to the meshing of the gear (33) and the rack (34), the other material plate (31) will be retracted to the position of the worker, at this time, the bidirectional screw rod (361) can be rotated, so that the two sliding blocks (362) drive the clamping plate (363) to move relatively, so as to clamp the workpiece, at the same time, the movement of the sliding block (362) can drive the trapezoidal block (51) to move, and extrude the positioning block (52) through the inclined surface, so that the positioning block (52) on both sides of the sliding groove is extruded to both sides under the force, and is inserted with the positioning groove, so that the workpiece is positioned, and at the same time, the material plate (31) is also positioned; Step three: after positioning, the first motor (21) and the second motor (251) can be started through the external controller, so that the threaded rod (22) and the lead screw (252) rotate, so that the moving frame (24) and the sliding block (253) drive the electric screwdriver head (254) to move in multiple positions, so as to screw the workpiece, at the same time, the worker can disassemble and install the workpiece on the retracted material plate (31) for next processing.

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