An automatic screwing machine

Abstract

The application discloses an automatic screw locking machine, which comprises a rack, a workbench arranged on the rack, a rotating mechanism, a positioning mechanism and a moving mechanism arranged on the workbench, a rotating shaft, a product clamping die arranged on the rotating shaft and fixed with the rotating mechanism through a quick release structure, the positioning mechanism arranged on one side of the rotating mechanism and used for positioning and fixing the rotating shaft, an electric screwdriver assembly arranged on the moving mechanism and located above the rotating mechanism. The automatic screw locking machine has the advantages of compact structure, ingenious design, mutual cooperation of various mechanisms, stable product clamping, high locking precision, realization of multi-surface screw locking of products, connection of the product clamping die for fixing the products with the rotating mechanism through the quick release structure, replacement of different product clamping dies for different products, effective improvement of efficiency and utilization rate of the equipment, reduction of cost and occupation space of the equipment.

Description

Technical Field

[0001] This invention relates to the field of screw fastening equipment, and more specifically, to an automatic screw fastening machine. Background Technology

[0002] With the continuous development of technology, screw fastening machines are now used to fasten screws on many products, replacing manual labor and improving efficiency. Initially, a single automatic screw fastening machine could only fasten screws on one surface of a product. If multiple surfaces needed screw fastening, multiple machines were required. Later, machines emerged that could fasten screws on multiple surfaces of a product, but different machines were still needed for different products. When there are many types of products requiring screw fastening, more fastening machines are needed, resulting in high investment costs and large space requirements.

[0003] In view of this, the inventor of this application has invented an automatic screw fastening machine. Summary of the Invention

[0004] The purpose of this invention is to provide an automatic screw fastening machine that is compact in structure, ingeniously designed, and allows for quick mold changes.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an automatic screw fastening machine, comprising a frame and a worktable mounted on the frame, wherein the worktable is provided with a rotating mechanism, a positioning mechanism and a moving mechanism, the rotating mechanism comprising a rotating shaft, wherein a product clamping mold is mounted on the rotating shaft, and the product clamping mold is assembled and fixed to the rotating mechanism via a quick-release structure, the positioning mechanism is located on one side of the rotating mechanism and is used to position and fix the rotating shaft, and the moving mechanism is provided with an electric screwdriver assembly, wherein the electric screwdriver assembly is located above the rotating mechanism.

[0006] Furthermore, the rotating shaft includes a front rotating shaft and a rear rotating shaft arranged coaxially. The rear end of the front rotating shaft and the front end of the rear rotating shaft are respectively provided with a front positioning mold and a rear positioning mold. The product clamping mold includes a clamping front mold and a clamping rear mold. The clamping front mold and the clamping rear mold are assembled and fixed with the front positioning mold and the rear positioning mold respectively through a quick-release structure. The worktable is provided with clearance holes at the position between the rear positioning mold and the front positioning mold.

[0007] Furthermore, both the front positioning mold and the rear positioning mold are provided with positioning pins, and both the clamping front mold and the clamping rear mold are provided with pin holes corresponding to the positioning pins. In addition, both the front positioning mold and the rear positioning mold are provided with multiple limiting protrusions that match the clamping front mold and the clamping rear mold.

[0008] Furthermore, the quick-release structure is a snap-fit, which includes a hook portion disposed on the side of the clamping front mold or the clamping rear mold, and a fastening portion corresponding to the front positioning mold or the rear positioning mold.

[0009] Furthermore, the rotating mechanism also includes a rotary motor that drives the rear rotating shaft to rotate, a front push cylinder is provided on the front side of the front positioning mold, a front push block is provided on the piston rod of the front push cylinder, one end of the front rotating shaft is connected to the front positioning mold, and the other end is connected to the front push block.

[0010] Furthermore, the positioning mechanism includes an angle positioning ring fixed on a rotating shaft, a positioning cylinder, and a positioning tongue fixed on the piston rod of the positioning cylinder. The outer surface of the angle positioning ring is provided with a plurality of positioning grooves that are adapted to the positioning tongue along its circumferential direction. The positioning tongue and the positioning cylinder are located on one side of the angle positioning ring, and the positioning cylinder drives the positioning tongue to engage or disengage from the positioning groove.

[0011] Furthermore, the positioning mechanism also includes a sensing plate disposed on the rotating shaft and a plurality of sensors disposed corresponding to the sensing plate. The sensors are arranged sequentially along the rotation direction of the rotating shaft, and the sensors are arranged one-to-one with the positioning grooves.

[0012] Furthermore, the positioning mechanism also includes an L-shaped guide block, one end of which is connected to the rotating shaft, and the other end is provided with a guide hole adapted to the positioning tongue. The positioning tongue passes through the guide hole and engages or disengages from the positioning groove.

[0013] Furthermore, it also includes an auxiliary fixing mechanism, which includes three auxiliary fixing modules located on the left, right, and lower sides of the product clamping mold, respectively. Each auxiliary fixing module includes an auxiliary fixing cylinder and a fixing block disposed on the piston rod of the auxiliary fixing cylinder.

[0014] Furthermore, the moving mechanism includes an X-axis module, a Y-axis module disposed on the X-axis module, and a Z-axis module disposed on the Y-axis module. The electric screwdriver assembly is disposed on the Z-axis module. The worktable is provided with multiple screw feeders, and the screw feeders are all located below the electric screwdriver assembly.

[0015] By adopting the above technical solution, the present invention has the following advantages compared with the prior art: This invention features an automatic screw fastening machine with a compact and ingenious design. The various mechanisms work together to ensure stable product clamping and high fastening accuracy. By incorporating a rotating mechanism, screws can be fastened to multiple sides of the product. Simultaneously, the product clamping mold is modularized and connected to the rotating mechanism via a quick-release structure, allowing for rapid assembly and disassembly of the product clamping mold. Different product clamping molds can be used for different products, effectively improving efficiency and equipment utilization, reducing costs, and minimizing equipment space requirements. Attached Figure Description

[0016] Figure 1 This is a perspective view of an automatic screw fastening machine according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the automatic screw fastening machine according to an embodiment of the present invention with the front side panel removed; Figure 3 This is a schematic diagram of the various mechanisms on the worktable of the automatic screw fastening machine according to an embodiment of the present invention; Figure 4 for Figure 3 Another perspective view of the structure shown; Figure 5 This is a schematic diagram of the rotating mechanism and positioning mechanism according to an embodiment of the present invention; Figure 6 for Figure 5 Another perspective view of the structure shown; Figure 7 This is a schematic diagram of the rotating mechanism and positioning mechanism of the present invention with the product clamping mold hidden. Figure 8 This is a schematic diagram of the product clamping and engagement in an embodiment of the present invention. At this time, the clamping front mold is in a forward-moving state, and the product can be taken out or put in. Figure 9 for Figure 8 A schematic diagram of the structure shown from another perspective.

[0017] Explanation of reference numerals in the attached figures: 10-Rack, 11-Workbench, 12-Electrical control component installation chamber, 13-Product clamping mold placement chamber, 14-Entrance / exit, 15-Safety light curtain, 16-Control switch, 17-Touch screen, 18-Leaving hole 20-Rotating mechanism, 21-Rotating axis, 211-Front rotating axis, 212-Rear rotating axis, 213-Front positioning mold, 214-Rear positioning mold, 215-Positioning pin, 216-Limiting protrusion, 22-Product clamping mold, 221-Front clamping mold, 2211-Front plate, 2212-Front base plate, 222-Rear clamping mold, 2221-Rear plate, 2222-Rear base plate, 223-Pin hole, 224-Positioning block, 225-Guide slide rail. 23-Quick release structure, 231-Hook and latch part, 232-Snap-fit ​​part. 24-Rotary motor, 241-Belt drive mechanism, 25 - Front pusher cylinder, 251 - Front pusher block, 30-Positioning mechanism, 31-Angle positioning ring, 311-Positioning groove, 32-Positioning cylinder, 33-Positioning tongue, 331-Connecting block, 34-Sensing element, 341-Sensor, 35-Guide block, 40-Mobile mechanism, 41-X-axis module, 411-X-axis slide rail, 412-X-axis electric cylinder, 413-connecting plate. 42-Y-axis module, 421-Y-axis electric cylinder 43-Z-axis module, 431-Z-axis electric cylinder 50-Electric screwdriver assembly, 51-Screw feeder, 52-Buffer cylinder, 53-Vacuum nozzle, 54-Vacuum generator, 55-Vacuum pressure gauge, 56-Electric screwdriver. 60-Auxiliary fixing mechanism, 61-Fixed cylinder, 62-Fixed pressure block. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0019] It should be noted that in this invention, the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", and "outer" are all based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element of this invention must have a specific orientation, and therefore should not be construed as a limitation of this invention.

[0020] Example Cooperate Figures 1 to 9 As shown, this invention discloses an automatic screw fastening machine, mainly used for fastening screws on products, replacing manual fastening, effectively improving efficiency. It also enables multi-face screw fastening of a single product and allows for quick mold changes, enabling one machine to be used for multiple products, effectively improving equipment utilization and reducing costs. For example, the product shown in this embodiment is a camera, which requires multi-face screw fastening. Other products with similar shapes and sizes can also be fastened using a single machine by changing the product clamping mold 22.

[0021] Cooperate Figures 1 to 2As shown, an automatic screw fastening machine includes a frame 10 and a workbench 11 mounted on the frame 10. The frame 10 has a multi-layer structure, with partitions on each layer and side panels around its perimeter to enclose and protect the equipment. The workbench 11 is located on the upper layer of the frame 10 for easy worker operation, and the main components of the automatic screw fastening machine are also mounted on the workbench 11. Below the workbench 11, there is an electrical control component mounting chamber 12 and a product clamping mold placement chamber 13. The electrical control component mounting chamber 12 mainly houses the electrical control components of the automatic screw fastening machine, while the product clamping molds 22 for different products are placed in the bottom-level product clamping mold placement chamber 13 for easy replacement. An entrance / exit 14 is provided on the front side panel of the workbench 11, through which workers operate and change the products with fastened screws. To ensure safety and facilitate operation, safety light curtains 15 are installed on both sides of the entrance / exit 14. The start switch, emergency stop switch, and other control switches 16, as well as the touch screen 17, are located on the outside of the equipment and on the front side of the equipment.

[0022] Cooperate Figures 3 to 9 As shown, the workbench 11 is provided with a rotating mechanism 20, a positioning mechanism 30 and a moving mechanism 40. The rotating mechanism 20 includes a rotating shaft 21, on which a product clamping mold 22 is provided. The product clamping mold 22 is assembled and fixed to the rotating mechanism 20 through a quick-release structure 23. The positioning mechanism 30 is located on one side of the rotating mechanism 20 and is used to position and fix the rotating shaft 21. The moving mechanism 40 is provided with an electric screwdriver assembly 50, which is located above the rotating mechanism 20.

[0023] The product clamping mold 22 is used to clamp and fix the product. The rotating shaft 21 drives the product clamping mold 22 and the product to rotate, thus achieving multi-sided fastening. The positioning mechanism 30 is used to position and fix the rotating shaft 21 during multi-sided fastening. The electric screwdriver assembly 50 is used for electric screw fastening. The moving mechanism 40 drives the electric screwdriver assembly 50 to move to the position of the product where the screw needs to be fastened, and fastens the screw accordingly. The product clamping mold 22 and the rotating mechanism 20 are assembled through a quick-release structure 23, so the product clamping mold 22 and the rotating mechanism 20 can be quickly disassembled and assembled. The product clamping mold 22 is modular, and it can be quickly replaced for different products. One machine can be used for multi-sided screw fastening of multiple products, effectively improving fastening efficiency, increasing equipment utilization, and reducing costs and equipment space occupation.

[0024] The rotating shaft 21 includes a front rotating shaft 211 and a rear rotating shaft 212 coaxially arranged. The rear end of the front rotating shaft 211 and the front end of the rear rotating shaft 212 are respectively provided with a front positioning mold 213 and a rear positioning mold 214. The product clamping mold 22 includes a clamping front mold 221 and a clamping rear mold 222. The clamping front mold 221 and the clamping rear mold 222 are assembled and fixed to the front positioning mold 213 and the rear positioning mold 214 respectively through a quick-release structure 23. The worktable 11 is provided with a clearance hole 18 at the position between the rear positioning mold 214 and the front positioning mold 213. The clamping front mold 221 and the clamping rear mold 222 are assembled and fixed to the front positioning mold 213 and the rear positioning mold 214 through the quick-release structure 23. The product is clamped and fixed between the clamping front mold 221 and the clamping rear mold 222. When replacing the product clamping mold 22, the clamping front mold 221 and the clamping rear mold 222 can be disassembled and assembled respectively. The clearance hole 18 provides clearance for the front positioning mold 213, the rear positioning mold 214, the product clamping mold 22, and the product rotation, making the overall structure of the worktable 11 more compact and simple.

[0025] The front positioning mold 213 and the rear positioning mold 214 are each provided with positioning pins 215. The clamping front mold 221 and the clamping rear mold 222 are each provided with pin holes 223 corresponding to the positioning pins 215. The front positioning mold 213 and the rear positioning mold 214 are each provided with a plurality of limiting protrusions 216 that match the clamping front mold 221 and the clamping rear mold 222. The clamping front mold 221 is positioned and adapted to the front positioning mold 213 through the cooperation of the positioning pin 215 and the pin hole 223. The clamping rear mold 222 is positioned and adapted to the rear positioning mold 214 through the cooperation of the positioning pin 215 and the pin hole 223. The limiting protrusions 216 on the front positioning mold 213 and the rear positioning mold 214 are designed to fit the clamping front mold 221 and the clamping rear mold 222. When the clamping front mold 221 and the clamping rear mold 222 are positioned and assembled on the front positioning mold 213 and the rear positioning mold 214, the limiting protrusions 216 just limit and block the clamping front mold 221 and the clamping rear mold 222 around them. This can effectively improve the assembly firmness of the clamping front mold 221 with the front positioning mold 213, the clamping rear mold 222 and the rear positioning mold 214, prevent the product clamping mold 22 and the product from shaking, and effectively improve the screw fastening accuracy.

[0026] The quick-release structure 23 is a snap-fit, which includes a hook portion 231 located on the side of the clamping front mold 221 or the clamping rear mold 222, and a fastening portion 232 located on the side of the corresponding front positioning mold 213 or the rear positioning mold 214. The snap-fit ​​is made of stainless steel and is a commercially available product, so it will not be described in detail here. The hook portion 231 is designed on the side of the clamping front mold 221 or the clamping rear mold 222, and the fastening portion 232 is located on the side of the corresponding front positioning mold 213 or the rear positioning mold 214. Multiple snap-fits are used, preferably designed on opposite sides of the product clamping mold 22, so that the snap-fit ​​engagement is more secure.

[0027] The rotating mechanism 20 also includes a rotary motor 24 that drives the rear rotating shaft 212 to rotate. A front-push cylinder 25 is provided on the front side of the front positioning mold 213, and a front-push block 251 is provided on the piston rod of the front-push cylinder 25. One end of the front rotating shaft 211 is connected to the front positioning mold 213, and the other end is connected to the front-push block 251. The rotary motor 24 is a geared motor, which is connected to the rear rotating shaft 212 through a belt drive mechanism 241, thereby driving the rear rotating shaft 212 to rotate. The rotary motor 24 is located below the worktable 11, and the belt drive mechanism 241 is connected to the rear rotating shaft 212 through a clearance hole 18. The rear end of the front rotating shaft 211 is fixedly connected to the front positioning mold 213, and its front end is connected to the front push block 251 through a bearing. The front push block 251 is located between the front push cylinder 25 and the front positioning mold 213. The front push cylinder 25 drives the front positioning mold 213 to move back and forth (moving along the axial direction of the rotating shaft 21) through the front push block 251, thereby causing the clamping front mold 221 to move back and forth.

[0028] The product clamping mold 22 is designed to mimic the specific shape of the product. The clamping front mold 221 includes a front plate 2211 and a front base plate 2212 located on one side of the front plate 2211. One side of the front plate 2211 (with pin holes 223) is adapted to be installed with the front positioning mold 213, and the other side is provided with multiple positioning blocks 224. The shape and number of positioning blocks 224 are designed according to the specific product. The positioning blocks 224 of the front plate 2211 are used to match and position one side of the product. The clamping rear mold 222 includes a rear plate 2221 and a rear base plate 2222 located on one side of the rear plate 2221. One side of the rear plate 2221 (with pin holes 223) is adapted to be installed with the rear positioning mold 214, and the other side is provided with multiple positioning blocks 224. The shape and number of positioning blocks 224 are designed according to the specific product. The positioning blocks 224 of the rear plate 2221 are used to match and position the other side of the product. The front base plate 2212 and the rear base plate 2222 are located on the same side of the product clamping mold 22, and this side of the product clamping mold 22 is provided with a guide rail 225 connecting the front base plate 2212 and the rear base plate 2222. The direction of the guide rail 225 is the front-back direction. When the front push cylinder 25 drives the front positioning mold 213 and the clamping front mold 221 to move back and forth, the clamping front mold 221 moves along the guide rail 225, making the movement more stable.

[0029] The forward-pushing cylinder 25 drives the front positioning mold 213 and the clamping front mold 221 to move forward, allowing the product to be removed or placed between the product clamping molds 22. The forward-pushing cylinder 25 also drives the front positioning mold 213 and the clamping front mold 221 to move backward, allowing the clamping front mold 221 and the clamping rear mold 222 to cooperate in clamping and fixing the product. The drive motor drives the rotating shaft to rotate, which in turn causes the product clamping mold 22, the product, and the front rotating shaft 211 to rotate together. As the product rotates, the electric screwdriver assembly 50 can fasten screws to different sides of the product, achieving multi-sided fastening.

[0030] Cooperate Figures 3 to 7 As shown, the positioning mechanism 30 includes an angle positioning ring 31 fixed on the rotating shaft 21, a positioning cylinder 32, and a positioning tongue 33 fixed on the piston rod of the positioning cylinder 32. The outer side of the angle positioning ring 31 is provided with a plurality of positioning grooves 311 that are adapted to the positioning tongue 33 along its circumferential direction. The positioning tongue 33 and the positioning cylinder 32 are located on one side of the angle positioning ring 31. The positioning cylinder 32 drives the positioning tongue 33 to engage or disengage from the positioning grooves 311.

[0031] The number of positioning grooves 311 on the angle positioning ring 31 and their relative positions are designed according to the product. The positioning grooves 311 correspond to the sides of the product where screws need to be fastened. When the positioning groove 311 engages with the positioning tongue 33, one of the fastening sides of the product is in a horizontal state, and the electric screwdriver assembly 50 fastens this horizontal side. In this embodiment, each pair of adjacent sides of the product is perpendicular to each other, corresponding to four positioning grooves 311, evenly distributed along the circumference of the angle positioning ring 31 (the angle between two adjacent positioning grooves 311 is 90 degrees). When any positioning groove 311 engages with the positioning tongue 33, one side of the product is in a horizontal state. Furthermore, both the positioning grooves 311 and the positioning tongue 33 are V-shaped, making their engagement more stable.

[0032] Angle positioning ring 31 is fixed to the rear end of the rear rotating shaft 212. When the positioning cylinder 32 drives the positioning tongue 33 to engage with the positioning groove 311, the rear rotating shaft 212 (rotating shaft 21) is fixed, preventing the rear rotating shaft 212 from rotating and affecting accuracy when tightening screws. When it is necessary to change to different sides for tightening, the positioning cylinder 32 drives the positioning tongue 33 to disengage from the positioning groove 311, and the rear rotating shaft 212 rotates to another positioning groove 311 to engage with the positioning tongue 33. The positioning tongue 33 engages with the positioning groove 311 to fix the rotating shaft 21 again, and tightening can be performed on the other side.

[0033] The positioning mechanism 30 further includes a sensing plate 34 mounted on a rotating shaft 21 and a plurality of sensors 341 corresponding to the sensing plate 34. The sensors 341 are arranged sequentially along the rotation direction of the rotating shaft 21, and each sensor 341 corresponds to a positioning groove 311. The sensing plate 34 is mounted on the rear rotating shaft 212, and each sensor 341 corresponds to a positioning groove 311. When the sensing plate 34 moves to the position of a certain sensor 341, a corresponding positioning groove 311 is in a position that can engage with the positioning tongue 33. The sensing plate 34 and the sensors 341 work together to control the operation of the rotary motor 24. The rotary motor 24 drives the rear rotating shaft 212 to rotate. When a certain sensor 341 senses the sensing plate 34, the rotary motor 24 stops working, and the rear rotating shaft 212 stops rotating. In this embodiment, the number of sensors 341 is three (the product has three sides that require screws to be fastened), and the included angle between adjacent sensors 341 is 90 degrees or 180 degrees. The type of sensor 341 can be a proximity switch or other suitable product depending on the actual situation, and there is no limitation here.

[0034] When it is necessary to change the screws on different sides of the product, the positioning tongue 33 exits the positioning groove 311, and the rotating shaft 212 rotates at a certain angle (90 degrees, 180 degrees, or 270 degrees in this embodiment) after the motor is driven. The corresponding sensor 341 senses the sensing plate 34, and the rotating motor 24 stops working. At this time, the positioning tongue 33 is inserted into the positioning groove 311 (another positioning groove 311) again, and the other side of the product is in a horizontal state. The electric screwdriver assembly 50 can then be used to fasten the screws on the horizontal side of the product.

[0035] The positioning mechanism 30 also includes an L-shaped guide block 35. One end of the guide block 35 is connected to the rotating shaft 21, and the other end has a guide hole adapted to the positioning tongue 33. The positioning tongue 33 passes through the guide hole and engages or disengages from the positioning groove 311. One end of the guide block 35 is sleeved on the outer periphery of the rear rotating shaft 212 via a bearing, and the other end extends to the side of the angle positioning ring 31 and is provided with a guide hole adapted to the positioning tongue 33. The positioning tongue 33 passes through the guide hole and engages with the positioning groove 311. Preferably, a connecting block 331 is also connected between the positioning tongue 33 and the piston rod of the positioning cylinder 32. The connecting block 331 is designed to be adapted to the guide hole. The design of the guide hole makes the movement of the positioning tongue 33 more stable, and the guide block 35 can further improve the stability of the engagement between the positioning tongue 33 and the angle positioning ring 31.

[0036] Cooperate Figures 2 to 4As shown, the automatic screw fastening machine also includes an auxiliary fixing mechanism 60. The auxiliary fixing mechanism 60 includes three auxiliary fixing modules located on the left, right, and lower sides of the product clamping mold 22, respectively. Each auxiliary fixing module includes an auxiliary fixing cylinder 61 and a fixing block 62 mounted on the piston rod of the auxiliary fixing cylinder 61. In the auxiliary fixing module located below the product clamping mold 22, the fixing block 62 is positioned above the fixing cylinder 61. The fixing cylinder 61 drives the fixing block 62 to rise and press against the product, and also drives it to fall away from the product. In the auxiliary fixing module located on the left side of the product clamping mold 22, the fixing block 62 is positioned to the right of the fixing cylinder 61. The fixing cylinder 61 drives the fixing block 62 to move to the right and press against the product, and also drives it to move to the left and away from the product. In the auxiliary fixing module located on the right side of the product clamping mold 22, the fixing block 62 is positioned to the left of the fixing cylinder 61. The fixing cylinder 61 drives the fixing block 62 to move to the left and press against the product, and also drives it to move to the right and away from the product.

[0037] The auxiliary fixing mechanism 60 is used to assist in fixing the product, further ensuring that the product will not wobble when screws are tightened (the electric screwdriver 56 has a large torque when tightening), and guaranteeing tightening accuracy. The three auxiliary fixing modules do not necessarily clamp and fix the product simultaneously. For specific products, the shape of the product clamping mold 22 will vary depending on the product shape. The three auxiliary fixing modules can operate at one time, two at a time, or all three simultaneously. The specific timing of clamping and fixing by the three auxiliary fixing modules can be designed according to actual needs and is not limited here. For example, in this embodiment, the product has three sides requiring screws, and the fourth side corresponds to the side of the product clamping mold 22 where the guide rail 225 is located, and this side does not require screws. When screwing the product, if the guide slide 225 on the product clamping mold 22 (the side of the product without screws) is on the lower side, the auxiliary fixing module below the product clamping mold 22 will assist in clamping the product. When the guide slide 225 on the product clamping mold 22 rotates to the left, the auxiliary fixing module on the right side of the product clamping mold 22 will assist in clamping the product. When the guide slide 225 on the product clamping mold 22 rotates to the right, the auxiliary fixing module on the left side of the product clamping mold 22 will assist in clamping the product. This completes the screw fastening on the three sides.

[0038] Cooperate Figures 2 to 4As shown, the moving mechanism 40 includes an X-axis module 41, a Y-axis module 42 mounted on the X-axis module 41, and a Z-axis module 43 mounted on the Y-axis module 42. The electric screwdriver assembly 50 is mounted on the Z-axis module 43. The worktable 11 is equipped with multiple screw feeders 51, all of which are located below the electric screwdriver assembly 50. The X-axis module 41 includes two sets of X-axis slide rails 411 on the left and right sides of the rotating mechanism 20, and X-axis electric cylinders 412 arranged along the X-axis direction. Each X-axis slide rail 411 is equipped with a connecting plate 413, one of which is connected to the X-axis electric cylinder 412 and driven by the X-axis electric cylinder 412 to move along the X-axis slide rail 411. The Y-axis module 42 includes Y-axis electric cylinders 421 mounted on the two connecting plates 413, which can reciprocate along the X-axis slide rails 411 with the connecting plates 413. Z-axis module 43 includes Z-axis electric cylinder 431 mounted on slider of Y-axis electric cylinder 421. Y-axis electric cylinder 421 drives Z-axis electric cylinder 431 to reciprocate along Y-axis direction. Screw feeder 51 includes multiple screw feeders, all located behind rotating mechanism 20 and ahead of electric screwdriver assembly 50.

[0039] The electric screwdriver assembly 50 includes a buffer cylinder 52 mounted on a Z-axis electric cylinder 431. An electric screwdriver 56 is mounted on the piston of the buffer cylinder 52 and is positioned along the Z-axis. The bottom end of the electric screwdriver 56 has a vacuum nozzle 53. The Z-axis electric cylinder 431 also has a vacuum generator 54 and a vacuum pressure gauge 55. The vacuum nozzle 53 is connected to the vacuum generator 54. The vacuum nozzle 53 picks up screws from the screw feeder 51. The electric screwdriver 56 rotates to attach the screws to the product surface. The moving mechanism 40 moves in coordination to complete the above actions. The result and working principle of the electric screwdriver 56 are conventional technology in this field and will not be elaborated further here. The buffer cylinder 52 acts as a buffer during attachment, preventing the screws from stripping due to excessive torque from the electric screwdriver 56.

[0040] The automatic screw fastening machine operates as follows: The front-push cylinder 25 moves the clamping front mold 221 forward, placing the product between the product clamping molds 22. The front-push cylinder 25 then drives the clamping front mold 221 backward to clamp and fix the product. Simultaneously, the auxiliary fixing mechanism 60 presses the product firmly. The moving mechanism 40 then drives the electric screwdriver assembly 50 to pick up the screw and move it above the product. The electric screwdriver 56 rotates, fastening the screw to the product surface. This process is repeated until all screws on the upper side of the product are fastened.

[0041] The electric screwdriver assembly 50 and the auxiliary fixing mechanism 60 return to their original positions. The positioning cylinder 32 drives the positioning tongue 33 to disengage from the positioning groove 311. The rotary motor 24 starts and drives the rotating shaft 21 and the product to rotate. When the next sensor 341 senses the sensing plate 34, the rotary motor 24 stops working, and the rotating shaft 21 and the product rotate into place. At this time, the positioning cylinder 32 drives the positioning tongue 33 to re-enter the positioning groove 311 (another positioning groove 311) to fix the rotating shaft 21. Then the moving mechanism and the electric screwdriver assembly 50 repeat the above process until the screws on the upper side (the other side of the product) of the product are locked.

[0042] The equipment repeats the above-mentioned rotation, positioning, and locking process until all screws on the surfaces of the product to be locked are locked. Finally, the front push cylinder 25 drives the clamping front mold 221 to move forward, remove the locked product and put in the next product to be locked, and so on.

[0043] When changing to different product clamping, the product clamping mold 22 needs to be replaced. The quick-release structure 23 (buckle) is released, and the clamping front mold 221 and clamping rear mold 222 are removed from the front positioning mold 213 and rear positioning mold 214 respectively and placed into the product clamping mold placement chamber 13 at the bottom. The product clamping mold 22 to be replaced is taken out. Through the cooperation of the positioning pin 215 and the pin hole 223, the clamping front mold 221 and clamping rear mold 222 can be quickly and accurately installed onto the front positioning mold 213 and rear positioning mold 214 respectively. Then, the buckle is fastened to complete the assembly and fixation of the product clamping mold 22. This completes the quick replacement of the product clamping mold 22, effectively improving efficiency.

[0044] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An automatic screw fastening machine, characterized in that: The device includes a frame and a worktable mounted on the frame. The worktable is equipped with a rotating mechanism, a positioning mechanism, and a moving mechanism. The rotating mechanism includes a rotating shaft with a product clamping mold mounted on it. The product clamping mold is assembled and fixed to the rotating mechanism via a quick-release structure. The positioning mechanism is located on one side of the rotating mechanism and is used to position and fix the rotating shaft. The moving mechanism is equipped with an electric screwdriver assembly, which is located above the rotating mechanism. The rotating shaft includes a front rotating shaft and a rear rotating shaft arranged coaxially. The rear end of the front rotating shaft and the front end of the rear rotating shaft are respectively provided with a front positioning mold and a rear positioning mold. The product clamping mold includes a clamping front mold and a clamping rear mold. The clamping front mold and the clamping rear mold are assembled and fixed to the front positioning mold and the rear positioning mold respectively through a quick-release structure. The worktable is provided with clearance holes at the position between the rear positioning mold and the front positioning mold. Both the front positioning mold and the rear positioning mold are provided with positioning pins, and both the clamping front mold and the clamping rear mold are provided with pin holes corresponding to the positioning pins. Furthermore, both the front positioning mold and the rear positioning mold are provided with multiple limiting protrusions that match the clamping front mold and the clamping rear mold. The rotating mechanism also includes a rotary motor that drives the rear rotating shaft to rotate. A front-push cylinder is provided on the front side of the front positioning mold, and a front-push block is provided on the piston rod of the front-push cylinder. One end of the front rotating shaft is connected to the front positioning mold, and the other end is connected to the front-push block. The front-push cylinder drives the front positioning mold to move back and forth through the front-push block, thereby moving the clamping front mold back and forth. It also includes a slide rail, and the clamping front mold can move along the guide slide rail. The frame has a multi-layer structure and is also equipped with an electrical control component mounting chamber and a product clamping mold placement chamber. The electrical control component mounting chamber is used to install electrical control components, and the product clamping mold placement chamber is used to place product clamping molds for different products. The quick-release structure is a buckle, which includes a hook portion provided on the side of the clamping front mold or the clamping rear mold, and a fastening portion corresponding to the front positioning mold or the rear positioning mold. The positioning mechanism includes an angle positioning ring fixed on a rotating shaft, a positioning cylinder, and a positioning tongue fixed on the piston rod of the positioning cylinder. The outer side of the angle positioning ring is provided with a plurality of positioning grooves that are adapted to the positioning tongue along its circumferential direction. The positioning tongue and the positioning cylinder are located on one side of the angle positioning ring. The positioning cylinder drives the positioning tongue to engage or disengage from the positioning groove.

2. The automatic screw fastening machine as described in claim 1, characterized in that: The positioning mechanism also includes a sensing plate on the rotating shaft and a plurality of sensors corresponding to the sensing plate. The sensors are arranged sequentially along the rotation direction of the rotating shaft, and each sensor corresponds to a positioning groove.

3. An automatic screw fastening machine as described in claim 1, characterized in that: The positioning mechanism also includes an L-shaped guide block, one end of which is connected to the rotating shaft, and the other end is provided with a guide hole adapted to the positioning tongue. The positioning tongue passes through the guide hole and is engaged or disengaged from the positioning groove.

4. An automatic screw fastening machine as described in claim 1, characterized in that: It also includes an auxiliary fixing mechanism, which includes three auxiliary fixing modules located on the left, right and lower sides of the product clamping mold, respectively. Each auxiliary fixing module includes an auxiliary fixing cylinder and a fixing block disposed on the piston rod of the auxiliary fixing cylinder.

5. An automatic screw fastening machine as described in claim 1, characterized in that: The moving mechanism includes an X-axis module, a Y-axis module mounted on the X-axis module, and a Z-axis module mounted on the Y-axis module. The electric screwdriver assembly is mounted on the Z-axis module. The worktable is equipped with multiple screw feeders, all of which are located below the electric screwdriver assembly.

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