Automatic screw preassembling equipment

Abstract

The invention discloses automatic screw preassembling equipment, which belongs to the field of fastening connection mechanical equipment, and comprises a nut turntable subassembly, a nut, spring washer and flat washer sorting subassembly, a target turntable subassembly, a screw assembling assembly, a screw pre-screwing subassembly and a manipulator subassembly, a nut turntable is arranged in the nut turntable subassembly, and a nut groove assembly is arranged on the edge of the turntable; comprising a plurality of nut grooves; the nut, spring washer and flat washer sorting assemblies are sequentially arranged on the periphery of one side of the nut rotating disc assembly, and the positions of the nut grooves are matched with all the sorting assemblies. The target rotating disc part is arranged on the other side of the nut rotating disc part, and an installation target is moved to the position above a nut groove; after being assembled by the screw assembling assembly, a screw and a flat washer are arranged on the screw pre-screwing part; the mechanical arm subassembly moves the screw pre-screwing subassembly to the position above the nut groove, and screw screwing is carried out. The screw pre-assembling device can automatically perform screw pre-assembling in batches, improves the production efficiency, reduces the production cost, shortens the product delivery time, and is high in automation degree.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical tooling, and in particular to an automatic screw pre-installing device. The device can be used in the photovoltaic field to automatically pre-install screws for fixing photovoltaic fixtures, but is not limited thereto. Background Art

[0002] With the development of the distributed photovoltaic industry, it is becoming more and more common to install photovoltaic panels on color steel tile roofs, and it is a common practice to use clamps to fix photovoltaic panel brackets on building color steel tiles. Among them, the clamps are generally fastened to the corrugations of the building color steel tiles with two sets of screws and nuts; the two sets of screws and nuts are pre-installed before going up to the building roof to improve the efficiency of high-altitude operations and reduce the time of high-altitude operations on the building roof. At present, the pre-installation of screws and nuts is mainly done manually, which leads to high production costs and long delivery time due to low labor efficiency.

[0003] In addition, spring washers and flat washers are often required when assembling screws and nuts. The ideal assembly order is: nut-spring washer-flat washer-installation target-flat washer-screw; however, workers are inevitably careless under long-term mechanical operation and put too many, too few or wrong washers, which will affect the stability and durability of the installation.

[0004] Therefore, there is an urgent need in the art for an automatic pre-installation device for screws, which can pre-install screws in batches, automatically and correctly. Summary of the invention

[0005] In order to overcome the defects of the prior art, the technical problem to be solved by the present invention is: how to pre-install screws in batches, automatically and correctly.

[0006] In order to solve the above technical problems, firstly, the present invention provides an automatic pre-installed screw device, which includes: a nut turntable assembly, a nut sorting assembly, a spring washer sorting assembly, a flat washer sorting assembly, a target turntable assembly, a screw assembly assembly, a screw pre-tightening assembly, and a manipulator assembly, wherein: The nut turntable assembly is provided with a nut turntable, which is a circular turntable with a nut slot on the edge of the turntable, and the nut slot assembly includes a plurality of nut slots; the nut sorting assembly, the spring washer sorting assembly, and the flat washer sorting assembly are sequentially arranged at the peripheral position of one side of the nut turntable assembly, and the positions of the nut slots are all adapted to the nut sorting assembly, the spring washer sorting assembly, and the flat washer sorting assembly, and after sorting, a "flat washer-spring washer-nut" combination is formed from top to bottom in the nut slot; The target turntable is installed on the other side of the nut turntable, and is used to move the installation target to the top of the "flat washer-spring washer-nut" combination to form an "installation target-flat washer-spring washer-nut" combination, and the target turntable holds the installation target until the automatic pre-installation of the screw is completed; The robot arm is installed between the nut turntable assembly and the target turntable assembly, and is connected to the screw pre-tightening assembly; the screw assembly assembly is arranged between the robot arm assembly and the target turntable assembly; wherein, the screw assembly assembly is used to assemble the screw and the flat washer, and then place them on the screw pre-tightening assembly; the robot arm assembly moves the screw pre-tightening assembly to the installation position of the "installation target-flat washer-spring washer-nut" combination, performs the screw tightening operation, and forms the "screw-flat washer-installation target-flat washer-spring washer-nut" combination, completing the automatic pre-installation of the screw.

[0007] Based on the above technical solution, the present invention can also be improved as follows.

[0008] Preferably, the equipment also includes a material unloading part, which is installed on one side of the target turntable part. After the automatic pre-installation of the screws is completed, the target turntable part transfers the "screw-flat washer-installation target-flat washer-spring washer-nut" combination to the material unloading part, and the material unloading is completed by the material unloading part.

[0009] Preferably, the nut turntable assembly also includes: a first rotating shaft, a first driven gear, a first base, a first driving gear, a first motor base and a first motor, wherein the top end of the first rotating shaft is sleeved with the first driven gear, and the gear shaft core of the first driven gear is connected to the center position of the nut turntable; the bottom end of the first rotating shaft is fixedly connected to the center position of the first base; the first driven gear is meshed with the first driving gear, and the first driving gear is fixedly connected to the motor shaft of the first motor and driven by the first motor, and the first motor base is fixed on the first rotating shaft, and the first motor is fixed on the first motor base.

[0010] Preferably, the target turntable assembly comprises: a second base, a second rotating shaft, a second motor, a second motor seat, a second driven gear, a second driving gear, a target turntable, a target clamping device, and a carrier, wherein the carrier is used for a staff member to place the installation target thereon, the bottom end of the second rotating shaft and the bottom end of the carrier are respectively fixedly connected to the second base, the top end of the second rotating shaft is sleeved with the second driven gear, and the gear shaft core of the second driven gear is connected to the center position of the target turntable; the second driven gear is meshed with the second driving gear, the second driving gear is fixedly connected to the motor shaft of the second motor and is driven by the second motor, the second motor seat is fixed on the second rotating shaft, and the second motor is fixed on the second motor seat; the target clamping device is provided on the edge of the target turntable for clamping the installation target.

[0011] Preferably, the screw pre-tightening component includes: a connecting plate, a third motor, a motor bracket, a coupling, a gear seat, a shifting cylinder, a sliding sleeve, a spring retaining ring, a shifting rod, an oil-free bushing, a pre-tightening air claw, a pre-tightening spring, a torsion rod, a clamping finger, a slave gear, a main gear and a rolling body, wherein the connecting plate is connected to the gear seat, and the gear seat is provided with the main gear and the slave gear supported by bearings, and the main gear is meshed with the slave gear; the main gear is also connected to the third motor shaft through the coupling, and after the third motor is started, it drives the main gear, and then transmits it to the slave gear.

[0012] Furthermore, the slave gear is connected to the sliding sleeve, the sliding sleeve is slidingly matched with the torsion rod, the torsion rod rotates together with the sliding sleeve, and the spring retaining ring is fixedly connected to the torsion rod; the shifting cylinder is fixedly connected to the gear seat, and the shifting cylinder is connected to the shifting rod, the shifting rod is equipped with the oil-free bushing and the torsion rod with a clearance fit, and the pre-tightened spring is installed between the shifting rod and the torsion rod.

[0013] Furthermore, the clamping fingers are connected to the pre-tightening air claws, and the rolling bodies are embedded in the clamping arc surfaces of the clamping fingers; wherein, the clamping fingers are used to clamp the screws and ensure that the screws can rotate when the screws are clamped; the pre-tightening air claws are arranged on the gear seat, and the clamping fingers clamp the screws under the drive of the pre-tightening air claws, and the center of the screws is aligned with the center of the torsion rod, and the shifting cylinder drives the shifting rod to move downward, and the torsion rod is made to slide in the sliding sleeve through the elastic force of the pre-tightening spring until the torsion rod presses the screw; after the third motor is started, it drives the main gear, and then transmits the transmission to the two slave gears, the sliding sleeve, the torsion rod and the screw to rotate until the pre-tightening of the screw is completed.

[0014] Preferably, the nut slot includes: a nut slot sliding block, a nut slot base, a small copper sleeve, a cylindrical pin, a nut slot spring, a support seat, a large copper sleeve, a guide column and a nut slot air claw, wherein the nut slot base is arranged above the support seat, the small copper sleeve is installed in the bottom through hole of the nut slot base, the large copper sleeve is installed in the bottom through hole of the support seat, the guide column slides with the small copper sleeve and the large copper sleeve at the same time, the nut slot spring is assembled between the guide column and the support seat and is concentric with the guide column; the nut slot air claw is fixedly connected between the nut slot base and the support seat, the nut slot air claw is connected to the nut slot sliding block, and the nut slot air claw drives the nut slot sliding block to slide and open and close in the nut slot base; a hexagonal groove is provided in the nut slot base.

[0015] Preferably, the nut sorting section, spring washer sorting section and flat washer sorting section are evenly and sequentially arranged at an angle around the nut turntable section.

[0016] More preferably, the angle is 45-90°.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The present invention can be adapted to commonly used screws and nuts on the market, can be mass-produced, and has strong adaptability, thereby improving production efficiency, reducing production costs, and shortening product delivery time; The present invention has a high degree of automation, low skill requirements for workers, and low labor intensity; The present invention ensures the order of the screw, nut and washer, thereby ensuring the stability and durability of the installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a top view schematic diagram of the automatic pre-installing screw device of the present invention; Figure 2 It is a side view schematic diagram of the nut turntable assembly in the present invention; Figure 3 It is a side view schematic diagram of the nut sorting device in the present invention; Figure 4 It is a side view schematic diagram of the spring washer sorting part of the present invention; Figure 5 It is a side view schematic diagram of the flat washer sorting unit of the present invention; Figure 6 is a schematic top view of the nut slot in the present invention; Figure 7 for Figure 6 AA section view; Figure 8 It is a side view schematic diagram of the target turntable assembly in the present invention; Fig. 9 It is a side view schematic diagram of the screw pre-tightening part of the present invention; Fig.10 for Fig. 9 AA section view; Fig.11 for Fig. 9 BB cross-sectional view; Fig.12 It is a structural schematic diagram of the screw assembly assembly in the present invention; Fig.13 It is a schematic diagram of the structure of the robot arm in the present invention; Fig.14 It is a schematic diagram of the blanking assembly structure in the present invention.

[0020] In the accompanying drawings, the component names represented by the reference numerals are listed as follows: 1- nut turntable assembly, 2- nut sorting assembly, 3- spring washer sorting assembly, 4- flat washer sorting assembly, 5- manipulator assembly, 51- screw pre-tightening assembly, 6- screw assembly assembly, 7- blanking assembly, 8- target turntable assembly; 9-first rotating shaft, 10-first driven gear, 11-nut rotating disk, 12-nut slot assembly, 13-first base, 14-first driving gear, 15-first motor base, 16-first motor; 17-second base, 18-second rotating shaft, 19-second motor, 20-second motor seat, 21-second driven gear, 52-second driving gear, 22-target turntable, 23-target clamping device, 24-carrier; 25-connecting plate, 26-third motor, 27-motor bracket, 28-coupling, 29-gear seat, 30-sliding cylinder, 31-sliding sleeve, 32-spring retaining ring, 33-sliding rod, 34-oil-free bushing, 35-pre-tightening air claw, 36-pre-tightening spring, 37-torsion rod, 38-clamping finger, 39-slave gear, 40-main gear, 41-rolling element; 42- nut slot sliding block, 43- nut slot base, 44- small copper sleeve, 45- cylindrical pin, 46- nut slot spring, 47- support seat, 48- large copper sleeve, 49- guide column, 50- nut slot air claw. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] First, please refer to Figure 1 As shown, it is a top view schematic diagram of the automatic pre-installed screw device of the present invention, the device comprises: a nut turntable assembly 1, a nut sorting assembly 2, a spring washer sorting assembly 3, a flat washer sorting assembly 4, a manipulator assembly 5, a screw pre-tightening assembly 51, a screw assembly assembly 6, a blanking assembly 7, and a target turntable assembly 8, wherein: The nut sorting part 2, the spring washer sorting part 3, and the flat washer sorting part 4 are sequentially arranged at the peripheral position of one side of the nut turntable part 1. Preferably, the nut sorting part 2, the spring washer sorting part 3, and the flat washer sorting part 4 are evenly and sequentially arranged at a certain angle around the nut turntable part 1, and the angle may be 45-90°, but is not limited thereto.

[0023] Specifically, please combine Figure 1 and Figure 2 As shown, Figure 2 It is a side view schematic diagram of the nut turntable assembly in the present invention; the nut turntable assembly 1 includes: a first rotating shaft 9, a first driven gear 10, a nut turntable 11, a nut slot assembly 12, a first base 13, a first driving gear 14, a first motor base 15 and a first motor 16, wherein, The nut turntable 11 is a circular turntable, and the nut slot assembly 12 is provided on the edge of the turntable. The nut slot assembly 12 includes a plurality of nut slots, and the positions of the nut slots are all adapted to the nut sorting assembly 2, the spring washer sorting assembly 3, and the flat washer sorting assembly 4; please refer to Figures 3 to 5 As shown, Figure 3 It is a side view schematic diagram of the nut sorting part in the present invention, Figure 4 It is a side view schematic diagram of the spring washer sorting part of the present invention, Figure 5 It is a side view schematic diagram of the flat washer sorting part assembly in the present invention; thus, the nuts, spring washers and flat washers sorted out by the nut sorting part assembly 2, the spring washer sorting part assembly 3 and the flat washer sorting part assembly 4 are placed in the nut slots in sequence, that is, each nut slot is placed with nuts, spring washers and flat washers from bottom to top; then, the nut turntable 11 rotates to transfer the nuts, spring washers and flat washers in the nut slot assembly 12 to the installation position, waiting for installation.

[0024] It should be noted that when the nut sorting unit, spring washer sorting unit and flat washer sorting unit are sorting, the nuts, spring washers and flat washers can be respectively loaded onto the vibrating screens of their respective sorting units and clamped into the nut slots by a small manipulator; this is the prior art, and similar structures are common in the device market. However, this is not limited to this, and those skilled in the art can select appropriate sorting unit components and structures according to actual needs; and all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] The top end of the first rotating shaft 9 is sleeved with the first driven gear 10, and the gear shaft core of the first driven gear 10 is connected to the center position of the nut turntable 11; the bottom end of the first rotating shaft 9 is fixedly connected to the center position of the first base 13; wherein, the shape of the first base 13 is not limited and can be flexibly selected according to actual needs.

[0026] Further, the first driven gear 10 is meshed with the first driving gear 14, the first driving gear 14 is fixedly connected to the motor shaft of the first motor 16 and driven by the first motor 16, the first motor seat 15 is fixed on the first rotating shaft 9, and the first motor 16 is fixed on the first motor seat 15; thus, the first motor is started, drives the first driving gear, drives the first driven gear, and then makes the nut turntable rotate with the first rotating shaft as the central axis, and the nut, spring washer and flat washer are transferred from the sorting position to the installation position along the nut slot of the nut slot assembly, waiting for installation.

[0027] Specifically, please combine Figure 6 and Figure 7 As shown, Figure 6 is a top view schematic diagram of the nut slot in the present invention, Figure 7 for Figure 6 AA cross-sectional view; the nut slot includes: a nut slot sliding block 42, a nut slot base 43, a small copper sleeve 44, a cylindrical pin 45, a nut slot spring 46, a support seat 47, a large copper sleeve 48, a guide column 49 and a nut slot air claw 50, wherein, The nut slot base 43 is arranged above the support seat 47, the small copper sleeve 44 is installed in the bottom through hole of the nut slot base 43, the large copper sleeve 48 is installed in the bottom through hole of the support seat 47, the guide column 49 is slidably matched with the small copper sleeve 44 and the large copper sleeve 48 at the same time, the nut slot spring 46 is assembled between the guide column 49 and the support seat 47 and is concentric with the guide column 49; the nut slot air claw 50 is fixedly connected between the nut slot base 43 and the support seat 47, and the nut slot air claw 50 is connected to the nut slot sliding block 42, thereby, the nut slot air claw 50 drives the nut slot sliding block 42 to slide and open and close in the nut slot base 43; in addition, a hexagonal groove is provided in the nut slot base 43 for placing the nut, and the spring washer and the flat washer are further placed above the nut.

[0028] Next, please refer to Figure 8 As shown, it is a side view schematic diagram of the target turntable assembly in the present invention; the target turntable assembly 8 is arranged on the other side of the nut turntable assembly 1, for example, the nut sorting assembly 2, the spring washer sorting assembly 3, and the flat washer sorting assembly 4 are sequentially arranged at the peripheral position of the left side of the nut turntable assembly 1, and the target turntable assembly 8 is arranged on the right side of the nut turntable assembly 1, but not limited to this; the target turntable assembly 8 includes: a second base 17, a second rotating shaft 18, a second motor 19, a second motor seat 20, a second driven gear 21, a second driving gear 52, a target turntable 22, a target clamping device 23, and a carrier 24, wherein, The carrier 24 is used for the staff to place the installation target on it. For example, if the installation target is the left and right clips of the clamp, the staff will assemble the left and right clips together and place them on the carrier. It can be understood that the role of the carrier in the target turntable assembly is equivalent to the role of the nut / spring washer / flat washer sorting assembly in the nut turntable assembly. However, the installation target is not limited to the clips of the clamp. The pre-installation equipment of the present invention has strong versatility and can be widely used in various industries in the mechanical field to perform pre-installation operations on nuts and screws.

[0029] The bottom ends of the second rotating shaft 18 and the bottom ends of the carrier 24 are fixedly connected to the second base 17 respectively, the top end of the second rotating shaft 18 is sleeved with the second driven gear 21, and the gear shaft core of the second driven gear 21 is connected to the center position of the target turntable 22; the second driven gear 21 is meshed with the second driving gear 52, and the second driving gear 52 is fixedly connected to the motor shaft of the second motor 19 and driven by the second motor 19, the second motor base 20 is fixed on the second rotating shaft 18, and the second motor 19 is fixed on the second motor base 20; thus, the second motor is started, drives the second driving gear, drives the second driven gear, and then makes the target turntable rotate with the second rotating shaft as the center axis; The target clamping device 23 is arranged on the edge of the target turntable 22. When the target clamping device 23 rotates to the position of the carrier 24 along with the target turntable 22, the target clamping device 23 clamps the installation target placed on the carrier 24 (such as the left and right clamps that have been assembled together); when it is rotated to above the installation position where the above-mentioned "flat washer-spring washer-nut" combination is located, the target clamping device 23 descends but does not loosen to place the installation target above the "flat washer-spring washer-nut" combination at a suitable distance, and ensures that the screw hole of the installation target is accurately aligned with the center hole of the flat washer, the center hole of the spring washer, and the screw hole of the nut from top to bottom.

[0030] At this point, the installation target, flat washer, spring washer and nut form a combination of "installation target-flat washer-spring washer-nut" from top to bottom, arrive at the installation position, and wait for the screw pre-installation operation; in this process, the target turntable assembly always clamps the installation target until the automatic screw pre-installation is completed.

[0031] Please combine Figures 9 to 11 As shown, Fig. 9 It is a side view schematic diagram of the screw pre-tightening part of the present invention, Fig.10 for Fig. 9 AA section view, Fig.11 for Fig. 9 BB cross-sectional view; the screw pre-tightening device 51 includes: a connecting plate 25, a third motor 26, a motor bracket 27, a coupling 28, a gear seat 29, a toggle cylinder 30, a sleeve 31, a spring retaining ring 32, a toggle rod 33, an oil-free bushing 34, a pre-tightening claw 35, a pre-tightening spring 36, a torsion rod 37, a clamping finger 38, a slave gear 39, a main gear 40 and a rolling body 41, wherein, The connecting plate 25 is connected to the gear seat 29, and the gear seat 29 is provided with the main gear 40 and the slave gear 39 supported by bearings, and the main gear 40 is meshed with the slave gear 39; the main gear 40 is also connected to the shaft of the third motor 26 through the coupling 28, so that after the third motor 26 is started, the main gear 40 is driven, and then the transmission is transmitted to the slave gear 39; Furthermore, the slave gear 39 is connected to the sliding sleeve 31, the sliding sleeve 31 is slidably matched with the torsion rod 37, the torsion rod 37 rotates together with the sliding sleeve 31, and the spring retaining ring 32 is fixedly connected to the torsion rod 37; Further, the shifting cylinder 30 is fixedly connected to the gear seat 29, and the shifting cylinder 30 is connected to the shifting rod 33, the shifting rod 33 is equipped with the oil-free bushing 34 and the torsion rod 37 with clearance fit, and the pre-tightening spring 36 is installed between the shifting rod 33 and the torsion rod 37; Furthermore, the clamping finger 38 is connected to the pre-tightening air claw 35, and the rolling body 41 is embedded in the clamping arc surface of the clamping finger 38; wherein, the clamping finger 38 is used to clamp the screw and ensure that the screw can rotate when the screw is clamped; in addition, the pre-tightening air claw 35 is arranged on the gear seat 29, and the clamping finger 38 is driven by the pre-tightening air claw 35 to clamp the screw, and the center of the screw is aligned with the center of the torsion rod 37, and the shifting cylinder 30 drives the shifting rod 33 to move downward, and the torsion rod 37 is caused to slide in the sliding sleeve 31 by the elastic force of the pre-tightening spring 36 until the torsion rod 37 presses the screw; after the third motor 26 is started, it drives the main gear 40, and then transmits the transmission to the two slave gears 39, the sliding sleeve 31, the torsion rod 37 and the screw to rotate until the pre-tightening of the screw is completed.

[0032] Next, please combine Figure 1 , Fig.12 , Fig.13 and Fig.14 As shown, Fig.12 is a schematic diagram of the structure of the screw assembly in the present invention, Fig.13 It is a schematic diagram of the structure of the robot arm in the present invention. Fig.14It is a schematic diagram of the structure of the material unloading assembly in the present invention; the manipulator assembly 5 is arranged between the nut turntable assembly 1 and the target turntable assembly 8, and is connected to the screw pre-tightening assembly 51; the screw assembly assembly 6 is arranged between the manipulator assembly 5 and the target turntable assembly 8, and the material unloading assembly 7 is arranged on one side of the target turntable assembly 8. It should be understood by those skilled in the art that the positional relationship between the manipulator assembly, the screw assembly assembly and the material unloading assembly is set based on the principle of smooth workflow and convenient operation of the staff; in addition, the material unloading assembly 7 is a preferred setting in this equipment but not a necessary setting. If simplification is required, this assembly can be omitted, and a packaging box / basket can be placed directly under the target turntable assembly 8, and it can be removed when full.

[0033] Therefore, in the present invention, after the screw assembly assembly 6 assembles the screw and the flat washer, it is placed on the screw pre-tightening device 51; the manipulator device 5 moves the screw pre-tightening device 51 to the installation position where the combination of "installation target-flat washer-spring washer-nut" is located, and performs the screw tightening operation to form the final "screw-flat washer-installation target-flat washer-spring washer-nut" combination, and finally transfers it from the target turntable device 8 to the blanking device 7, and the blanking is completed by the blanking device 7. A fixture assembly is assembled, and the above process is continuously repeated to realize a mass production process.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automatic pre-installed screw device, characterized in that: The equipment includes: a nut turntable assembly, a nut sorting assembly, a spring washer sorting assembly, a flat washer sorting assembly, a target turntable assembly, a screw assembly assembly, a screw pre-tightening assembly, and a manipulator assembly, wherein: The nut turntable assembly is provided with a nut turntable, which is a circular turntable, and a nut slot assembly is provided on the edge of the turntable, and the nut slot assembly includes a plurality of nut slots; the nut sorting assembly, the spring washer sorting assembly, and the flat washer sorting assembly are sequentially arranged at the peripheral position of one side of the nut turntable assembly, and the positions of the nut slots are all adapted to the nut sorting assembly, the spring washer sorting assembly, and the flat washer sorting assembly, and after sorting, a "flat washer-spring washer-nut" combination is formed from top to bottom in the nut slot; The target turntable is installed on the other side of the nut turntable, and is used to move the installation target to the top of the "flat washer-spring washer-nut" combination to form an "installation target-flat washer-spring washer-nut" combination, and the target turntable holds the installation target until the automatic pre-installation of the screw is completed; The robot arm is installed between the nut turntable assembly and the target turntable assembly, and is connected to the screw pre-tightening assembly; the screw assembly assembly is installed between the robot arm assembly and the target turntable assembly; wherein, the screw assembly assembly is used to assemble the screw and the flat washer, and then place them on the screw pre-tightening assembly; the robot arm assembly moves the screw pre-tightening assembly to the installation position of the "installation target-flat washer-spring washer-nut" combination, performs the screw tightening operation, and forms the "screw-flat washer-installation target-flat washer-spring washer-nut" combination, completing the automatic pre-installation of the screw.

2. The automatic pre-installed screw equipment according to claim 1, characterized in that: It also includes a blanking part, which is installed on one side of the target turntable part. After the automatic pre-installation of the screws is completed, the target turntable part transfers the "screw-flat washer-installation target-flat washer-spring washer-nut" combination to the blanking part, and the blanking is completed by the blanking part.

3. The automatic pre-installed screw equipment according to claim 1 or 2, characterized in that: The nut turntable assembly also includes: a first rotating shaft, a first driven gear, a first base, a first driving gear, a first motor base and a first motor, wherein the first driven gear is sleeved on the top end of the first rotating shaft, and the gear shaft core of the first driven gear is connected to the center position of the nut turntable; the bottom end of the first rotating shaft is fixedly connected to the center position of the first base; the first driven gear is meshed with the first driving gear, and the first driving gear is fixedly connected to the motor shaft of the first motor and driven by the first motor, the first motor base is fixed on the first rotating shaft, and the first motor is fixed on the first motor base.

4. The automatic pre-installed screw equipment according to claim 1 or 2, characterized in that: The target turntable assembly includes: a second base, a second rotating shaft, a second motor, a second motor seat, a second driven gear, a second driving gear, a target turntable, a target clamping device, and a carrier, wherein the carrier is used for a worker to place the installation target thereon, the bottom end of the second rotating shaft and the bottom end of the carrier are respectively fixedly connected to the second base, the top end of the second rotating shaft is sleeved with the second driven gear, and the gear shaft core of the second driven gear is connected to the center position of the target turntable; the second driven gear is meshed with the second driving gear, the second driving gear is fixedly connected to the motor shaft of the second motor and is driven by the second motor, the second motor seat is fixed on the second rotating shaft, and the second motor is fixed on the second motor seat; the target clamping device is arranged on the edge of the target turntable for clamping the installation target.

5. The automatic pre-installed screw equipment according to claim 1 or 2, characterized in that: The screw pre-tightening assembly includes: a connecting plate, a third motor, a motor bracket, a coupling, a gear seat, a shifting cylinder, a sliding sleeve, a spring retaining ring, a shifting rod, an oil-free bushing, a pre-tightening air claw, a pre-tightening spring, a torsion rod, a clamping finger, a slave gear, a main gear and a rolling body, wherein the connecting plate is connected to the gear seat, and the gear seat is provided with the main gear and the slave gear supported by bearings, and the main gear is meshed with the slave gear; the main gear is also connected to the third motor shaft through the coupling, and after the third motor is started, it drives the main gear, and then transmits the power to the slave gear.

6. The automatic pre-installed screw device according to claim 5, characterized in that: The slave gear is connected to the sliding sleeve, the sliding sleeve is slidingly matched with the torsion rod, the torsion rod rotates together with the sliding sleeve, and the spring retaining ring is fixedly connected to the torsion rod; the shifting cylinder is fixedly connected to the gear seat, and the shifting cylinder is connected to the shifting rod, the shifting rod is equipped with the oil-free bushing and the torsion rod with a clearance fit, and the pre-tightening spring is installed between the shifting rod and the torsion rod.

7. The automatic pre-installed screw device according to claim 6, characterized in that: The clamping fingers are connected to the pre-tightening air claws, and the rolling bodies are embedded in the clamping arc surfaces of the clamping fingers; wherein the clamping fingers are used to clamp the screws and ensure that the screws can rotate when the screws are clamped; the pre-tightening air claws are arranged on the gear seat, and the clamping fingers clamp the screws under the drive of the pre-tightening air claws, and the center of the screws is aligned with the center of the torsion rod, and the shifting cylinder drives the shifting rod to move downward, and the torsion rod slides in the sliding sleeve through the elastic force of the pre-tightening spring until the torsion rod presses the screw; after the third motor is started, it drives the main gear, and then transmits the transmission to the two slave gears, the sliding sleeve, the torsion rod and the screw to rotate until the pre-tightening of the screw is completed.

8. The automatic pre-installed screw device according to claim 1 or 2, characterized in that: The nut slot includes: a nut slot sliding block, a nut slot base, a small copper sleeve, a cylindrical pin, a nut slot spring, a support seat, a large copper sleeve, a guide column and a nut slot air claw, wherein the nut slot base is arranged above the support seat, the small copper sleeve is installed in the bottom through hole of the nut slot base, the large copper sleeve is installed in the bottom through hole of the support seat, the guide column is slidably matched with the small copper sleeve and the large copper sleeve at the same time, the nut slot spring is assembled between the guide column and the support seat and is concentric with the guide column; the nut slot air claw is fixedly connected between the nut slot base and the support seat, the nut slot air claw is connected to the nut slot sliding block, and the nut slot air claw drives the nut slot sliding block to slide and open and close in the nut slot base; a hexagonal groove is provided in the nut slot base.

9. The automatic pre-installed screw device according to claim 1 or 2, characterized in that: The nut sorting part, the spring washer sorting part and the flat washer sorting part are evenly and sequentially arranged at an angle around the nut turntable part.

10. The automatic pre-installed screw device according to claim 9, characterized in that: The angle is 45-90°.

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