CN213531552U

CN213531552U - One drags many screw members screw in pre-assembly machine

Info

Publication number: CN213531552U
Application number: CN202022593932.5U
Authority: CN
Inventors: 石维亮
Original assignee: Superway Nanjing Automation Technology Co ltd
Current assignee: Superway Nanjing Automation Technology Co ltd
Priority date: 2020-11-11
Filing date: 2020-11-11
Publication date: 2021-06-25
Anticipated expiration: 2030-11-11

Abstract

The utility model discloses a screw in pre-assembly machine for one drags many screw elements relates to automatic mechanical assembly field, including vertical reference plate, the parallel vertical sliding plate that is equipped with in the other interval in vertical reference plate thickness direction one side, the sliding plate with be equipped with elevating system between the vertical reference plate, be equipped with screw in assembly devices on the sliding plate. The machine is designed for one-driving-more automation, the working efficiency is greatly improved, and the labor force is saved.

Description

One drags many screw members screw in pre-assembly machine

Technical Field

The utility model relates to an automatic change mechanical assembly field, concretely relates to screw member screw in pre-assembly machine that drags more that assembly efficiency is high, compact structure, sexual valence relative altitude, be convenient for make.

Background

In the existing assembly process, two parts with threaded inner and outer holes need to be screwed in and preassembled for many times, so that the use of the next procedure is facilitated, the product is large in yield generally, and the efficiency requirement is high. In the prior art, a screw gun is generally adopted for tightening, and the tightening mode has a plurality of problems, such as: one gun can only correspond to one product when working, and the efficiency is low; the tool cost is high, the quality of the screw guns on the market is uneven, and the damage rate is high; the manual assembly method wastes a great deal of labor. Therefore, a new solution is now needed.

Disclosure of Invention

In order to solve the problem, the utility model discloses a screw in pre-assembly machine with one dragging more, this machine is the automated design with one dragging more, and work efficiency promotes greatly, practices thrift the labour.

In order to achieve the above purpose, the utility model provides a following technical scheme: the one-driving-multiple threaded part screw-in pre-assembling machine comprises a vertical reference plate, sliding plates are vertically arranged on one side of the thickness direction of the vertical reference plate at intervals in parallel, a lifting mechanism is arranged between the sliding plates and the vertical reference plate, and a screw-in assembling mechanism is arranged on the sliding plates.

As an improvement of the utility model, vertical reference plate corresponds another side upper portion of sliding plate position is equipped with horizontal reference plate perpendicularly, horizontal reference plate length direction both sides upper end with all be equipped with the strengthening rib on the reference plate between the vertical reference plate, horizontal reference plate length direction both sides lower extreme with all be equipped with the strengthening rib under the reference plate between the vertical reference plate, elevating system includes cylinder mounting panel, cylinder mounting bracket, lift cylinder, guide rail and slider, screw in assembly devices includes that reducing gear box, reducing gear box position that motor, motor lower extreme were equipped with are equipped with the head of wholesale that synchronizing wheel drive assembly and synchronizing wheel drive assembly position below were equipped with. The reinforcing rib can be designed into a triangular prism shape, the motor is a servo motor, and the reduction gearbox is a planetary reduction gearbox and is used for increasing torque.

As an improvement of the utility model, vertical reference plate top side is equipped with the cylinder mounting panel, be equipped with on the cylinder mounting panel the cylinder mounting bracket, the cylinder mounting bracket upper end is vertical to be equipped with the lift cylinder, the flexible end of lift cylinder is vertical to be set up downwards, and its flexible end tip with sliding plate top portion is connected, vertical reference plate corresponds on the wall of sliding plate position one side end and the equal vertical guide rail that is equipped with in this end wall width direction both sides, the sliding plate with it does not be equipped with the slider to divide equally between the guide rail, guide rail top position side is other and be located divide equally on the vertical reference plate and do not be equipped with the buffer, just be located under the guide rail bottom equally divide on the vertical reference plate and do not be equipped with down the buffer. The sliding block is matched with the guide rail, the sliding block can slide along the length direction of the guide rail, and the buffer provides limiting and buffering effects for the up-and-down movement of the sliding plate.

As an improvement of the utility model, the synchronizing wheel drive assembly includes the outside synchronous pulley and the outside synchronous belt that overlaps of synchronizing wheel that is equipped with of transmission shaft, the outside synchronous pulley that overlaps of transmission shaft and the synchronizing wheel between bolster bearing housing, step bearing, bolster bearing housing and the step bearing.

As an improvement of the present invention, the sliding plate is provided with the motor at a top portion corresponding to the other side end of the vertical reference plate position, the sliding plate is provided with the upper bearing seat and the lower bearing seat corresponding to the other side end of the vertical reference plate position, and the lower bearing seat is located under the upper bearing seat position, the upper bearing seat includes a first upper bearing seat and second upper bearing seats respectively located at both sides of the first upper bearing seat position along the width direction of the sliding plate, the lower bearing seat includes a first lower bearing seat directly below the first upper bearing seat position and a second lower bearing seat directly below the second upper bearing seat position, the transmission shaft includes a first transmission shaft vertically provided between the first upper bearing seat and the first lower bearing seat and a second transmission shaft vertically provided between the second upper bearing seat and the second lower bearing seat, the synchronizing wheels comprise a group of driving synchronizing wheels sleeved on the first transmission shaft and driven synchronizing wheels respectively sleeved on the second transmission shaft.

As an improvement of the utility model, screw in assembly devices still includes the tensioning subassembly, the tensioning subassembly includes the sliding plate corresponds a vertical reference plate position side just is close to first transmission shaft with mount, the mount that medial position all was equipped with between the second transmission shaft correspond screw thread roof and tensioning bolt, the tensioning seat that length direction one end tip all was connected with the screw thread roof, the vertical tensioning axle that is equipped with of tensioning seat length direction other end tip and the tensioning wheel that has of tensioning axle outside cover. The threaded top plate and the fixed frame are in a non-connection relationship.

As an improvement of the utility model, the mount corresponds the sliding plate position opposite side end just is equipped with the tensioning bolt along its length direction, it has the tensioning screw hole to open on the screw thread roof, the tensioning bolt runs through the setting of tensioning screw hole, the equal length direction one end tip of tensioning seat with screw thread roof connection, other end tip correspond the sliding plate position sets up, equal vertical division has logical groove on the mount, it all follows to lead to the groove mount length direction designs, it is equipped with locking bolt to lead to the equal vertical activity of inslot to run through, equal vertical division has the locking screw on the tensioning seat, the equal top tip of locking bolt is twisted in the locking screw, the cover has between initiative synchronizing wheel, driven synchronizing wheel and the take-up pulley outside the hold-in range.

As an improvement of the utility model, first transmission shaft top bottom end part is equallyd divide and is do not run through first bolster bearing housing, first step stretch out, second transmission shaft bottom end part is equallyd divide and does not run through the second step stretches out, first transmission shaft top end with be equipped with first shaft coupling between the vertical decurrent output end of reducing gear box, first transmission shaft, second transmission shaft bottom end part all are equipped with the second shaft coupling, second shaft coupling lower extreme all is equipped with criticizes first sleeve, the sliding plate corresponds another side bottom in vertical reference plate position is equipped with erection bracing frame, erection bracing frame is last and corresponds criticize the equal vertical opening in first sleeve position and have the round mouth, equal vertical running through in the round mouth is equipped with criticize the head.

As an improvement of the utility model, equal vertical running through is equipped with wear-resisting bush in the round hole, criticize the equal vertical running through of head wear-resisting bush sets up, criticize first top tip and all stretch into criticize in the first sleeve, criticize in the first sleeve and be located criticize the first outside and all overlap and have first spring, the outside equal movable sleeve in wear-resisting bush bottom has unsteady pressure head, all be equipped with the second spring between unsteady pressure head and the erection bracing frame. The setting of first spring makes the batch head up-and-down motion, and the second spring that is equipped with makes the pressure head that floats up-and-down motion for the during operation compresses tightly the product.

As an improvement of the utility model, the second spring all overlap in the wear-resisting bush outside, equal vertical opening has spacing logical groove on the wear-resisting bush lower extreme lateral wall, all open spacing screw on the pressure head top lateral wall of floating, just all twist in the spacing screw and have a spacing screw, spacing screw all runs through spacing screw twists spacing logical inslot. The limiting screw extends into the limiting through groove, but a gap exists between the limiting screw and the bit.

Compared with the prior art, the utility model has the advantages of as follows: the machine is designed for one-driving-more automation, the screwing efficiency of the threaded part is obviously improved, and a plurality of parts can be assembled through one-time rotating assembly. The single motor design can drag a plurality of batch heads, thereby reducing the cost and improving the economy. The design of the automatic floating pressure head and the fine prepressing part improves the screwing quality. The lifting mechanism can realize flexible regulation and control of the position of the batch head, and convenience is provided for work and use of the batch head. The single motor can realize the supply of multi-path pre-rotation force through the synchronous wheel transmission component. The tensioning assembly can realize flexible regulation and control of the tensioning of the synchronous belt.

Drawings

Fig. 1 is a schematic front view of a structure of the screw-in preassembler for multiple screws of the present invention;

fig. 2 is a rear view structural schematic diagram of the screwing-in preassembler of the multi-split screw member of the present invention;

FIG. 3 is a plan view of a partial structure of the synchronizing wheel transmission assembly;

FIG. 4 is a schematic perspective view of the synchronizing wheel transmission assembly;

FIG. 5 is a schematic view of the tension assembly position;

FIG. 6 is a schematic view of the transmission structure of the second coupling;

fig. 7 is a schematic view of the position of the limiting through groove;

list of reference numerals: 1. a vertical reference plate; 2. a sliding plate; 3. a lifting mechanism; 4. screwing in the assembling mechanism; 5. a horizontal reference plate; 6. reinforcing ribs are arranged on the reference plate; 7. a lower reinforcing rib of the reference plate; 8. a cylinder mounting plate; 9. a cylinder mounting frame; 10. a lifting cylinder; 11. a guide rail; 12. a slider; 13. a motor; 14. a reduction gearbox; 15. a synchronizing wheel transmission assembly; 16. a batch head; 17. an upper buffer; 18. a lower buffer; 19. a synchronous belt; 20. a first upper bearing housing; 21. a second upper bearing housing; 22. a first lower bearing seat; 23. a second lower bearing seat; 24. a first drive shaft; 25. a second drive shaft; 26. a driving synchronizing wheel; 27. a driven synchronizing wheel; 28. a tension assembly; 29. a fixed mount; 30. a threaded top plate; 31. tensioning the bolt; 32. a tensioning seat; 33. tensioning the shaft; 34. a tension wheel; 35. locking the bolt; 36. a first coupling; 37. a second coupling; 38. a bit sleeve; 39. mounting a support frame; 40. a wear-resistant bushing; 41. a first spring; 42. a floating pressure head; 43. a second spring; 44. a limiting through groove; 45. and a limiting screw.

Detailed Description

Example 1: referring to fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, fig. 6, and fig. 7, the utility model provides a screw-in preassembling machine for multi-split threaded parts is now explained, including vertical reference plate 1, the other parallel vertical sliding plate 2 that is equipped with of interval of vertical reference plate 1 thickness direction one side, be equipped with elevating system 3 between sliding plate 2 and vertical reference plate 1, be equipped with screw-in assembly mechanism 4 on sliding plate 2.

Example 2: referring to fig. 1, 2, 3, 4, 5, 6 and 7, a description will now be given of a multi-screw screwing preassembly according to the present invention, a horizontal reference plate 5 is vertically arranged at the upper part of the other side end of the vertical reference plate 1 corresponding to the sliding plate 2, a reference plate upper reinforcing rib 6 is arranged between the upper ends of the two sides of the horizontal reference plate 5 in the length direction and the vertical reference plate 1, a reference plate lower reinforcing rib 7 is arranged between the lower ends of the two sides of the horizontal reference plate 5 in the length direction and the vertical reference plate 1, the lifting mechanism 3 comprises a cylinder mounting plate 8, a cylinder mounting frame 9, a lifting cylinder 10, a guide rail 11 and a slide block 12, the screw-in assembling mechanism 4 comprises a motor 13, a reduction gearbox 14 arranged at the lower end of the motor 13, a synchronous wheel transmission assembly 15 arranged below the reduction gearbox 14, and a screwdriver bit 16 arranged below the synchronous wheel transmission assembly 15.

Example 3: referring to fig. 1 and fig. 2, a description will now be given of a screwing-in preassembling machine for multi-screw members provided by the present invention, the top side of the vertical reference plate 1 is provided with an air cylinder mounting plate 8, the air cylinder mounting plate 8 is provided with an air cylinder mounting frame 9, the upper end of the cylinder mounting rack 9 is vertically provided with the lifting cylinder 10, the telescopic end of the lifting cylinder 10 is vertically arranged downwards, the end part of the telescopic end of the vertical reference plate 1 is connected with the top end part of the sliding plate 2, the end wall of one side of the vertical reference plate 1 corresponding to the sliding plate 2 is provided with guide rails 11 vertically at both sides of the end wall in the width direction, sliding blocks 12 are respectively arranged between the sliding plate 2 and the guide rail 11, upper buffers 17 are respectively arranged beside the top end position of the guide rail 11 and on the vertical reference plate 1, and lower buffers 18 are respectively arranged right below the bottom end of the guide rail 11 and on the vertical reference plate 1.

Example 4: referring to fig. 1, fig. 3, fig. 4, and fig. 5, the screw-in preassembling machine for one-drag-multiple screws according to the present invention is now described, in which the synchronizing wheel transmission assembly 15 includes an upper bearing seat, a lower bearing seat, a transmission shaft disposed between the upper bearing seat and the lower bearing seat, a synchronizing wheel externally sleeved on the transmission shaft, and a synchronous belt 19 externally sleeved on the synchronizing wheel.

Example 5: referring to fig. 1, 3, 4, and 5, the screw pre-assembly machine for screwing multiple screws provided by the present invention is now described, wherein the sliding plate 2 corresponds to the top of the other side end of the position of the vertical reference plate 1 and is provided with the motor 13, the sliding plate 2 corresponds to the other side end of the position of the vertical reference plate 1 and is provided with the upper bearing seat and the lower bearing seat, the lower bearing seat is located under the upper bearing seat position, the upper bearing seat includes a first upper bearing seat 20 and a second upper bearing seat 21 respectively located at both sides of the position of the first upper bearing seat 20 along the width direction of the sliding plate 2, the lower bearing seat includes a first lower bearing seat 22 under the position of the first upper bearing seat 20 and a second lower bearing seat 23 under the position of the second upper bearing seat 21, and the transmission shaft includes a first transmission shaft 24 vertically arranged between the first upper bearing seat 20 and the first lower bearing seat 22 and a second upper bearing seat 21 and a second lower bearing seat 23 And a second transmission shaft 25 is vertically arranged between the second lower bearing seats 23, and the synchronizing wheels comprise a group of driving synchronizing wheels 26 sleeved on the first transmission shaft 24 and driven synchronizing wheels 27 respectively sleeved on the second transmission shaft 25.

Example 6: referring to fig. 1, fig. 2, fig. 3, fig. 4, and fig. 5, it is now right that the present invention provides a screwing preassembling machine for multiple threaded parts, the screwing assembly mechanism 4 further includes a tensioning assembly 28, the tensioning assembly 28 includes a fixing frame 29, which is located at a side end of the sliding plate 2 corresponding to the vertical reference plate 1 and is close to the middle position between the first transmission shaft 24 and the second transmission shaft 25, and the fixing frame 29 corresponds to a threaded top plate 30 and a tensioning bolt 31, which are located at the other side end of the sliding plate 2 corresponding to the threaded top plate 30, a tensioning seat 32, which is connected to the threaded top plate 30 at one end of the length direction, a tensioning shaft 33, which is vertically located at the other end of the tensioning seat 32, and a tensioning wheel 34, which is externally sleeved on.

Example 7: referring to fig. 1, 2, 3, 4, and 5, it is now right that the present invention provides a screw-in preassembling machine for one-to-many screws, wherein the fixing frame 29 corresponds to the other end of the position of the sliding plate 2 and is provided with a tensioning bolt 31 along the length direction thereof, the threaded top plate 30 is provided with a tensioning threaded hole, the tensioning bolt 31 penetrates through the tensioning threaded hole, one end of the tensioning seat 32 in the length direction is connected to the threaded top plate 30, the other end of the tensioning seat corresponds to the position of the sliding plate 2, the fixing frame 29 is vertically provided with a through groove, the through groove is designed along the length direction of the fixing frame 29, the through groove is vertically provided with a locking bolt 35, the tensioning seat 32 is vertically provided with a locking screw hole, the end of the locking bolt 35 is screwed into the locking screw hole, and the driving synchronizing wheel 26 is vertically provided with a driving synchronizing wheel 26, The timing belt 19 is sleeved between the driven timing pulley 27 and the tension pulley 34.

Example 8: referring to fig. 1, 4, 6 and 7, the screw pre-assembling machine for one-to-many screws provided by the present invention is now described, wherein the top end portion and the bottom end portion of the first transmission shaft 24 respectively penetrate through the first upper bearing seat 20 and the first lower bearing seat 22 to extend out, the bottom end portion and the bottom end portion of the second transmission shaft 25 respectively penetrate through the second lower bearing seat 23 to extend out, a first coupling 36 is disposed between the top end portion and the vertically downward output end portion of the reduction box 14 of the first transmission shaft 24, the bottom end portion and the bottom end portion of the second transmission shaft 25 are respectively provided with a second coupling 37, the lower ends of the second couplings 37 are respectively provided with a bit sleeve 38, the bottom of the other end of the sliding plate 2 corresponding to the vertical reference plate 1 is provided with an installation support frame 39, the installation support frame 39 and the bit sleeve 38 are vertically provided with round openings, the batch heads 16 vertically penetrate through the round openings.

Example 9: referring to fig. 1, 6, 7, it is right now that the utility model provides a pair of screw in preassembler for one drags many is explained, equal vertical running through in the round mouth is equipped with wear-resisting bush 40, criticize the equal vertical running through of head 16 wear-resisting bush 40 sets up, criticize head 16 top end all stretch into in the first sleeve 38 of criticizing, criticize in the first sleeve 38 and be located the first spring 41 of the equal cover in the first 16 outside of criticizing, the outside equal movable sleeve in wear-resisting bush 40 bottom has unsteady pressure head 42, all be equipped with second spring 43 between unsteady pressure head 42 and the erection bracing frame 39.

Example 10: referring to fig. 1, fig. 6 and fig. 7, it is now right that the utility model provides a pair of screw in preassembling machine for one-drag-many screw elements is explained, second spring 43 all overlaps in the wear-resisting bush 40 outside, it has spacing logical groove 44 all to open vertically on the lateral wall of wear-resisting bush 40 lower extreme, it has spacing screw all to open on the lateral wall of unsteady pressure head 42 top, just all twists in the spacing screw to have spacing screw 45, spacing screw 45 all runs through spacing screw twists in spacing logical groove 44.

The present invention can also combine at least one of the technical features of examples 2, 3, 4, 5, 6, 7, 8, 9, 10 with example 1 to form a new implementation.

The working principle is as follows: and the vertical reference plate, the horizontal reference plate, the upper reference plate reinforcing rib and the lower reference plate reinforcing rib are used for mounting and supporting the whole position of the machine. The lifting mechanism can be used for adjusting and controlling the position of the screwdriver bit, and the screw-in assembly mechanism is used for screwing in the threaded part. The lifting cylinder operates, the sliding plate can move up and down through the sliding block and the guide rail, and the upper buffer and the lower buffer provide limiting and buffering effects for the up-and-down movement of the sliding plate. The motor operation can drive first transmission shaft through reducing gear box, first shaft coupling and rotate, and the rotation of first transmission shaft can drive the rotation of second transmission shaft through initiative synchronizing wheel, driven synchronizing wheel, take-up pulley and hold-in range, and the regulation and control of take-up pulley position can be realized to the tensioning subassembly that is equipped with to realize the hold-in range tensioning and adjust. Rotate the locking bolt and make it constantly twist out from the locking screw hole, be the active state between tensioning seat and the mount this moment, rotate the tensioning bolt, the rotation of tensioning bolt can realize through the tensioning screw hole that the screw thread roof moves along tensioning bolt length direction, and the motion of screw thread roof can drive the motion of tensioning seat in the lump, and the motion of tensioning seat can drive locking bolt, tensioning axle, take-up pulley in the lump and move. After the position of the tensioning wheel is adjusted, the locking bolt is rotated to be continuously screwed into the locking screw hole, and the fixed frame and the tensioning seat can be fastened and connected. The rotation of first transmission shaft, second transmission shaft can drive through second shaft coupling, criticize first sleeve and criticize the head rotatory, criticize the first spring that the head was equipped with at the during operation and make its up-and-down motion, the second spring that is equipped with makes unsteady pressure head up-and-down motion for the during operation compresses tightly the product, criticizes the head and can freely rotate and reciprocate in wear-resisting bush. The limiting screw penetrates through the limiting screw hole and is screwed into the limiting through groove, the directional movement of the floating pressure head is realized, the limiting effect can be achieved, the end part of the screwing-in end of the limiting screw does not press the batch head, and the working use of the batch head is not influenced.

The technical means disclosed by the scheme of the present invention is not limited to the technical means disclosed by the above embodiments, but also includes the technical scheme formed by the arbitrary combination of the above technical features. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications are also considered as the protection scope of the present invention.

Claims

1. The screw-in pre-assembly machine for the multi-split threaded part comprises a vertical reference plate (1) and is characterized in that a sliding plate (2) is vertically arranged beside one side of the vertical reference plate (1) in the thickness direction at intervals in a parallel mode, a lifting mechanism (3) is arranged between the sliding plate (2) and the vertical reference plate (1), and a screw-in assembly mechanism (4) is arranged on the sliding plate (2).

2. A multi-screw drive pre-assembly machine as claimed in claim 1, wherein: a horizontal reference plate (5) is vertically arranged at the upper part of the other side end of the vertical reference plate (1) corresponding to the sliding plate (2), a reference plate upper reinforcing rib (6) is arranged between the upper ends of the two sides of the horizontal reference plate (5) in the length direction and the vertical reference plate (1), a reference plate lower reinforcing rib (7) is arranged between the lower ends of the two sides of the horizontal reference plate (5) in the length direction and the vertical reference plate (1), the lifting mechanism (3) comprises a cylinder mounting plate (8), a cylinder mounting frame (9), a lifting cylinder (10), a guide rail (11) and a slide block (12), the screw-in assembling mechanism (4) comprises a motor (13), a reduction gearbox (14) arranged at the lower end of the motor (13), a synchronizing wheel transmission assembly (15) arranged below the position of the reduction gearbox (14) and a screwdriver head (16) arranged below the position of the synchronizing wheel transmission assembly (15).

3. A multi-screw drive pre-assembly machine as claimed in claim 2, wherein: the top side of the vertical reference plate (1) is provided with a cylinder mounting plate (8), the cylinder mounting plate (8) is provided with a cylinder mounting frame (9), the upper end of the cylinder mounting rack (9) is vertically provided with the lifting cylinder (10), the telescopic end of the lifting cylinder (10) is vertically arranged downwards, the end part of the telescopic end of the vertical reference plate is connected with the top end part of the sliding plate (2), the end wall of one side of the vertical reference plate (1) corresponding to the sliding plate (2) is provided with guide rails (11) vertically on both sides of the end wall in the width direction, sliding blocks (12) are respectively arranged between the sliding plate (2) and the guide rail (11), an upper buffer (17) is respectively arranged beside the top position of the guide rail (11) and on the vertical reference plate (1), and lower buffers (18) are respectively arranged under the bottom ends of the guide rails (11) and on the vertical reference plate (1).

4. A multi-screw drive pre-assembly machine as claimed in claim 2, wherein: the synchronizing wheel transmission assembly (15) comprises an upper bearing seat, a lower bearing seat, a transmission shaft arranged between the upper bearing seat and the lower bearing seat, a synchronizing wheel sleeved outside the transmission shaft and a synchronizing belt (19) sleeved outside the synchronizing wheel.

5. A multi-screw drive pre-assembly machine as claimed in claim 4, wherein: the motor (13) is arranged at the top of the other side end of the sliding plate (2) corresponding to the vertical reference plate (1), the upper bearing seat and the lower bearing seat are arranged at the other side end of the sliding plate (2) corresponding to the vertical reference plate (1), the lower bearing seat is positioned under the upper bearing seat, the upper bearing seat comprises a first upper bearing seat (20) and second upper bearing seats (21) which are respectively arranged at two sides of the first upper bearing seat (20) along the width direction of the sliding plate (2), the lower bearing seats comprise a first lower bearing seat (22) under the first upper bearing seat (20) and a second lower bearing seat (23) under the second upper bearing seat (21), the transmission shaft comprises a first transmission shaft (24) vertically arranged between the first upper bearing seat (20) and the first lower bearing seat (22), and a second upper bearing seat (21) and a second lower bearing seat (23) 23) A second transmission shaft (25) vertically arranged therebetween, and the synchronizing wheels comprise a group of driving synchronizing wheels (26) sleeved on the first transmission shaft (24) and driven synchronizing wheels (27) respectively sleeved on the second transmission shaft (25).

6. A multi-screw drive pre-assembly machine as claimed in claim 5, wherein: screw in assembly devices (4) still include tensioning member (28), tensioning member (28) include sliding plate (2) correspond vertical benchmark board (1) position one side and be close to first transmission shaft (24) with mount (29), mount (29) that medial position all was equipped with between second transmission shaft (25) correspond screw thread roof (30) and tensioning bolt (31) that sliding plate (2) position another side all was equipped with, tensioning seat (32) that length direction one end tip was connected with screw thread roof (30), tensioning seat (32) the vertical tensioning axle (33) and the outside take-up pulley (34) that overlaps of tensioning axle (33) that are equipped with of length direction other end tip.

7. A multi-screw drive pre-assembly machine as claimed in claim 6, wherein: the fixed frame (29) is provided with a tensioning bolt (31) along the length direction corresponding to the other side end of the sliding plate (2), a tensioning threaded hole is formed in the threaded top plate (30), the tensioning bolt (31) penetrates through the tensioning threaded hole, one end part of the tensioning seat (32) in the length direction is connected with the threaded top plate (30), the other end part is arranged corresponding to the sliding plate (2), through grooves are vertically arranged on the fixed frame (29), the through grooves are all designed along the length direction of the fixed frame (29), the through grooves are vertically and movably penetrated with locking bolts (35), the tensioning seat (32) is vertically provided with locking screw holes, the end parts of the top ends of the locking bolts (35) are screwed into the locking screw holes, and the synchronous belt (19) is sleeved among the driving synchronous wheel (26), the driven synchronous wheel (27) and the tensioning wheel (34).

8. A multi-screw drive pre-assembly machine as claimed in claim 5, wherein: the end parts of the top and bottom ends of the first transmission shaft (24) respectively penetrate through the first upper bearing seat (20) and the first lower bearing seat (22) to extend out, the bottom end parts of the second transmission shafts (25) respectively penetrate through the second lower bearing blocks (23) to extend out, a first coupling (36) is arranged between the top end of the first transmission shaft (24) and the vertically downward output end of the reduction gearbox (14), the bottom end parts of the first transmission shaft (24) and the second transmission shaft (25) are respectively provided with a second coupling (37), the lower ends of the second couplers (37) are respectively provided with a screwdriver head sleeve (38), the bottom of the other side end of the sliding plate (2) corresponding to the vertical reference plate (1) is provided with a mounting support frame (39), the mounting support frame (39) is provided with a round opening corresponding to the position of the batch head sleeve (38), and the batch head (16) vertically penetrates through the round opening.

9. A multi-screw drive pre-assembly machine as claimed in claim 8, wherein: equal vertical running through in the round hole is equipped with wear-resisting bush (40), criticize the equal vertical running through of head (16) wear-resisting bush (40) set up, criticize head (16) top tip and all stretch into criticize in first sleeve (38), criticize in first sleeve (38) and be located criticize the head (16) outside and all overlap and have first spring (41), the outside equal movable sleeve in wear-resisting bush (40) bottom has unsteady pressure head (42), all be equipped with second spring (43) between unsteady pressure head (42) and erection bracing frame (39).

10. A multi-screw drive pre-assembly machine as claimed in claim 9, wherein: the second springs (43) are all sleeved on the outer side of the wear-resistant bushing (40), the outer side wall of the lower end of the wear-resistant bushing (40) is vertically provided with a limiting through groove (44), the outer side wall of the top of the floating pressure head (42) is provided with a limiting screw hole, a limiting screw (45) is screwed into the limiting screw hole, and the limiting screw (45) penetrates through the limiting screw hole and is screwed into the limiting through groove (44).