An online automatic screw machine

Abstract

This invention belongs to the field of automation technology, and particularly relates to an online automatic screw fastening machine. The online automatic screw fastening machine includes a frame and a conveying mechanism, an automatic electric screwdriver, a material selection device, and a guiding device mounted on the frame. The conveying mechanism is used for conveying workpieces to achieve continuous operation. The automatic electric screwdriver is used to pick up screws from the guiding device and place them into the workpiece. The material selection device is used to select screws and guide them into the guiding device in a specific orientation. The guiding device is used to adjust the screws to a specific direction of rotation so that the screwdriver head aligns with the screw's notch direction when the automatic electric screwdriver picks up the screw. The online automatic screw fastening machine provided by this invention, through the coordinated operation of the material selection device, the guiding device, the conveying mechanism, and the automatic electric screwdriver, achieves fully automatic screw feeding, orientation, and fastening.

Description

Technical Field

[0001] This invention belongs to the field of automation technology, and in particular relates to an online automatic screw machine. Background Technology

[0002] A screw fastening machine is a small, automated machine that fastens screws by automatically feeding, positioning, and tightening them, replacing traditional manual or semi-manual screw fastening operations. Its core structure consists of a feeding section and a fastening section—the feeding section is responsible for screening, arranging, and supplying screws, while the fastening section is responsible for picking up the screws and screwing them into the workpiece.

[0003] Common feeding methods include air blowing and suction feeding. Air blowing can deliver screws to the bottom of the electric screwdriver nozzle for continuous operation, but it is usually only suitable for screws smaller than M5 and less than 25mm in length. For larger screws, suction feeding is generally used to move the electric screwdriver to the designated feeding position to pick up the screw.

[0004] Traditional screw feed stations typically only handle screw selection and positioning. The alignment mechanism between the electric screwdriver and the screw slot is located inside the screwdriver head. After the screwdriver picks up the screw, the internal orientation structure is needed to align the screwdriver head with the nut slot. This method requires setting a separate alignment time and increases the structural complexity of the screwdriver head, necessitating improvement. Summary of the Invention

[0005] The purpose of this invention is to provide an online automatic screw picker, which aims to solve the problem of screw orientation.

[0006] The present invention is implemented as follows: an online automatic screw machine, the online automatic screw machine including a frame and a conveying mechanism, an automatic electric screwdriver, a material selection device and a orientation device disposed on the frame; The conveying mechanism is used to transport workpieces to enable continuous operation; The automatic electric screwdriver is used to pick up screws from the orientation device and place the screws into the workpiece; The material selection device is used to select screws and to guide the screws into the orientation device in a specific orientation. The orientation device is used to adjust the screw to a specific direction of rotation so that the screwdriver bit is aligned with the screw slot direction when the automatic electric screwdriver picks up the screw.

[0007] The online automatic screwdriver provided in this embodiment achieves fully automatic screw feeding, orientation, and fastening through the coordinated operation of a material selection device, an orientation device, a conveying mechanism, and an automatic electric screwdriver. Its core technical effect or purpose is that, by setting up an orientation device, a purely mechanical structure is used to screw the screws to a uniform orientation, making it easy for the automatic electric screwdriver to pick up the screws from a fixed position with a fixed orientation. This eliminates the need for a complex orientation structure on the screwdriver head and the need for photoelectric or image recognition schemes, resulting in high reliability. It is suitable for screws larger than M5 and longer that are difficult to convey by air. This method simplifies the structure of the screwdriver head, saves time spent on angle adjustment, and improves efficiency. Attached Figure Description

[0008] Figure 1 A three-dimensional structural diagram of an online automatic screw machine provided in an embodiment of the present invention; Figure 2 This is an internal structure diagram of an online automatic screw machine provided in an embodiment of the present invention; Figure 3 This is a structural diagram of the conveying mechanism of an online automatic screw machine provided in an embodiment of the present invention; Figure 4 This is a three-dimensional moving mechanism structure diagram of an online automatic screw machine provided in an embodiment of the present invention; Figure 5 This is a structural diagram of an automatic electric screwdriver for an online automatic screwdriver provided in an embodiment of the present invention; Figure 6 This is a structural diagram of the material selection device and orientation device of the online automatic screw machine provided in an embodiment of the present invention; Figure 7 This is a structural diagram of the orienting device for an online automatic screw machine provided in an embodiment of the present invention; Figure 8 This is a transmission structure diagram of the orienting device of an online automatic screw machine provided in an embodiment of the present invention; Figure 9 This is a diagram of the internal transmission structure of the clamping block; Figure 10 This is a diagram of the transmission structure of the orientation mechanism; Figure 11 This is a diagram of the transmission structure between the first and second spiral notches.

[0009] In the diagram: 100, frame; 200, conveying mechanism; 210, first track; 220, second track; 230, first slider; 240, first screw; 250, slide rail; 300, automatic electric screwdriver; 310, X-axis guide rail; 320, second slider; 330, second screw; 340, Y-axis guide rail; 350, third slider; 360, vertical guide rail; 370, mounting plate; 380, push cylinder; 390, sliding plate; 391, air jacket; 392, conduit; 3 93. Push guide rail; 400. Material selection device; 500. Orientation device; 510. Mounting body; 520. Drive cylinder; 530. L-shaped channel; 531. Mounting bracket; 532. Push block; 533. First clamping block; 534. Second clamping block; 535. Threaded hole; 536. Support rod; 540. Orientation motor; 541. Orientation cylinder; 542. First spiral notch; 543. Second spiral notch; 544. Rotating rod; 545. Driven gear; 546. Drive gear. Detailed Implementation

[0010] 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.

[0011] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0012] like Figure 1 The diagram shown is a structural diagram of an online automatic screw machine provided in an embodiment of the present invention. The online automatic screw machine includes a frame and a conveying mechanism, an automatic electric screwdriver, a material selection device, and a directional device disposed on the frame. The conveying mechanism is used to transport workpieces to enable continuous operation; The automatic electric screwdriver is used to pick up screws from the orientation device and place the screws into the workpiece; The material selection device is used to select screws and to guide the screws into the orientation device in a specific orientation. The orientation device is used to adjust the screw to a specific direction of rotation so that the screwdriver bit is aligned with the screw slot direction when the automatic electric screwdriver picks up the screw.

[0013] In this embodiment, as Figure 1As shown, the frame serves as the load-bearing foundation for the entire equipment, used to install and fix various functional units. It is typically constructed from welded profiles or spliced ​​aluminum profiles to provide sufficient structural strength and stability. In this embodiment, the frame is designed as a cabinet structure, with an observation window on the front for monitoring the operation. The left and right sides have inlet and outlet ports, respectively. Furthermore, the lower front, sides, and back have openable cabinet doors for easy access to the interior for maintenance and other operations. Figure 2 The arrangement of the various devices or mechanisms inside the rack is shown.

[0014] In this embodiment, the conveying mechanism can transfer the workpiece to be screwed (such as PCB board, housing, automotive parts, etc.) from the previous station to the screw-locking station, and after screwing is completed, transfer it to the next station, thereby forming an automated assembly line operation; in addition, by using the movement of the workpiece in the conveying mechanism, screws can be sequentially screwed at various positions on the workpiece, reducing the movement distance of the automatic electric screwdriver.

[0015] In this embodiment, the automatic electric screwdriver is the core component for performing the screw-locking action. It can move in three-dimensional space and accurately screw the screw into the threaded hole of the workpiece after picking it up.

[0016] In this embodiment, the function of the material selection device is to organize the disordered screws to ensure that each screw output to the orientation device is in a uniform posture with its head facing up and its tail facing down, in preparation for the subsequent orientation process.

[0017] In this embodiment, the orientation device is the core mechanism of the present invention for solving the problem of traditional screwdrivers relying on visual recognition. It rotates the cross slot or slot of the screw to a preset fixed angle through a purely mechanical structure, thereby ensuring that the automatic electric screwdriver does not need to perform angle positioning when picking up the screw, simplifying the structure of the electric screwdriver head, saving the time occupied by angle adjustment, and improving the fastening efficiency.

[0018] The online automatic screwdriver provided in this embodiment achieves fully automatic screw feeding, orientation, and fastening through the coordinated operation of a material selection device, an orientation device, a conveying mechanism, and an automatic electric screwdriver. The core advantage of this invention lies in its use of a purely mechanical structure to rotate screws to a uniform orientation via an orientation device. This allows the automatic electric screwdriver to pick up screws from a fixed position with a fixed orientation, eliminating the need for complex orientation structures on the screwdriver head or photoelectric / image recognition schemes. This method offers high reliability and is suitable for screws larger than M5 that are long and difficult to convey by air. It simplifies the screwdriver head structure, saves time spent on angle adjustments, and improves efficiency.

[0019] In one embodiment of the present invention, the conveying mechanism includes a first track and a second track; The first track and the second track are arranged side by side on the frame and both ends extend beyond the frame. The bottom of the first track and / or the second track is provided with a first slider, which slides in cooperation with the slide rail on the frame. A first screw is provided between the first track and the second track. The distance between the first track and the second track is adjusted by rotating the first screw to accommodate workpieces of different specifications.

[0020] In this embodiment, as Figure 3 As shown, the first and second tracks together form the workpiece carrying and guiding channel. The way the first and second tracks extend beyond the frame at both ends allows for seamless connection with upstream and downstream conveyor lines (such as belt conveyors or roller conveyors), facilitating workpiece inflow and outflow. By setting a first slider at the bottom of the first and / or second tracks to cooperate with a slide rail on the frame, smooth and precise movement of the two tracks in the width direction can be ensured. By rotating the first screw, the first and / or second tracks can be precisely driven to move towards or away from each other along the slide rail, thereby adjusting the spacing between the two tracks to accommodate workpieces of different widths (e.g., PCB boards of different sizes), improving the versatility and flexibility of the equipment. In this embodiment, the first and second tracks adopt the same structural form, with a ticket opening mechanism as the framework. Several pulleys are arranged on opposite sides of the two track profiles, and transmission belts are fitted onto the pulleys. The pulleys are driven to rotate by a motor. The motor can be installed on the side opposite to the ticket opening mechanism, coaxially with one of the pulleys on the track. Of course, other transmission structures can also be used to transmit the motor's power to the pulleys; this is an optional implementation method, and this embodiment of the invention does not further limit it. In use, products such as PCB boards can be placed between the two transmission belts of the two tracks and transported as the transmission belts rotate.

[0021] In one embodiment of the present invention, the automatic electric screwdriver is mounted on a three-dimensional moving mechanism; The three-dimensional moving mechanism includes an X-axis moving mechanism, a Y-axis moving mechanism, and a Z-axis moving mechanism; The X-axis moving mechanism spans above the conveying mechanism, and the moving direction of the X-axis moving mechanism is perpendicular to the conveying direction of the conveying mechanism. The X-axis moving mechanism includes two parallel X-axis guide rails, and a second slider is provided on the X-axis guide rails. The second slider is driven to move by a second screw. The Y-axis moving mechanism is mounted on the Z-axis moving mechanism. The Y-axis moving mechanism includes a Y-axis guide rail, which is parallel to the conveying direction of the conveying mechanism. A third slider is mounted on the Y-axis guide rail and is driven to move by a third screw. The automatic electric screwdriver is mounted on the third slider. The Z-axis moving mechanism includes two vertical guide rails, the bottoms of which are respectively mounted on the second slider. A linear motor is installed inside each of the two vertical guide rails, and the sliding part of the linear motor is connected to one end of the Y-axis guide rail to drive the Y-axis guide rail to move up and down.

[0022] In this embodiment, as Figure 4 As shown, the three-dimensional moving mechanism is used to drive the automatic electric screwdriver to move precisely in the X, Y, and Z directions in space to pick up screws and locate screw holes on the workpiece for screw fastening. Specifically, the X-axis moving mechanism spans above the conveying mechanism, and its two X-axis guide rails provide support for the automatic electric screwdriver across the frame. The second screw drives the second slider to slide along the X-axis guide rails, thereby achieving the positioning of the electric screwdriver in the X direction (e.g., the front-back direction of the frame). The Y-axis moving mechanism is set on the Z-axis moving mechanism, and its Y-axis guide rail is parallel to the conveying direction. The third screw drives the third slider to move, achieving the positioning of the electric screwdriver in the Y direction (e.g., the left-right direction of the frame). The Z-axis moving mechanism uses two vertical guide rails, the bottom of which is fixed on the second slider in the X-axis direction on both sides. The linear motor drives the two ends of the Y-axis guide rail to move up and down along the vertical guide rail. This dual-guide rail, dual-drive structure ensures the smoothness and synchronization of the Y-axis moving mechanism and the automatic electric screwdriver on it in the Z-direction (i.e., the up and down direction), avoids the off-center load and jamming that may be caused by single-sided drive, and ensures the accuracy of vertical pressing when tightening screws.

[0023] In one embodiment of the present invention, the automatic electric screwdriver includes a mounting plate, a pushing mechanism, and an electric screwdriver body; The mounting plate is disposed on the third slider; The pushing mechanism includes a pushing cylinder, a sliding plate, and a pushing guide rail. The pushing cylinder is fixed relative to the mounting plate. The actuating end of the pushing cylinder is connected to the sliding plate. The bottom of the sliding plate is slidably connected to the pushing guide rail via a slider. The pushing direction of the pushing cylinder is parallel to the moving direction of the Z-axis moving mechanism. The electric screwdriver body is mounted on the sliding plate and moves with the sliding plate.

[0024] In this embodiment, as Figure 4 , 5As shown, the mounting plate serves as an intermediate connector, mounting the entire automatic electric screwdriver onto the third slider of the three-dimensional moving mechanism. The pushing mechanism constitutes an independent fine-tuning lifting unit. Since the Z-axis moving mechanism of the three-dimensional moving mechanism is mainly used for rapid positioning over a large stroke, while the pushing mechanism is used for precise feeding within a small final range, specifically, when the Z-axis moving mechanism lowers the electric screwdriver body to a position close to the workpiece surface, the pushing cylinder is activated, its actuating end extending to push the sliding plate and the electric screwdriver body on it downwards along the pushing guide rail. Because the pushing cylinder has the characteristics of fast response and high precision, this ensures that the electric screwdriver bit can contact and screw in the screw at a controllable speed and pressure, avoiding impact caused by the large inertia of the Z-axis main drive (linear motor), effectively protecting the workpiece and the screw.

[0025] In one embodiment of the present invention, an air sleeve is provided on the end of the electric screwdriver body. When not under force, the electric screwdriver head is exposed outside the air sleeve. The air sleeve is connected to a negative pressure air source through a conduit to form a negative pressure inside the air sleeve for adsorbing screws.

[0026] In this embodiment, as Figure 5 As shown, the air sleeve is the key component for screw pickup. In the unloaded state, the tip of the electric screwdriver bit slightly protrudes from the end face of the air sleeve, which facilitates guidance when contacting the screw. When screw pickup is needed, the negative pressure air source connected to the conduit generates suction inside the air sleeve. When the electric screwdriver bit is aligned with the pre-oriented screw head in the orientation device, the screw is attracted to the end of the electric screwdriver bit under the negative pressure. Due to the holding effect of the negative pressure, the screw will not fall off during the movement and rotation of the electric screwdriver. Compared with traditional mechanical grippers, this vacuum suction method has a more compact structure and faster material pickup speed, and is especially suitable for long screws (M5 and above) that are difficult to transport by air blowing.

[0027] In one embodiment of the present invention, the material selection device is disposed on the side of the frame away from the conveying mechanism, and the material selection device is a spiral vibrating plate.

[0028] In this embodiment, as Figure 6 As shown, placing the material selection device on the side of the frame away from the conveying mechanism prevents vibrations from the vibratory feeder from being transmitted to the precision screw-locking station, ensuring fastening accuracy. The spiral vibratory feeder is a mature screw supply device. Through vibration at the bottom of the feeder and a spiral ascending track, it utilizes centrifugal force and gravity to cause screws with incorrect postures to fall back to the bottom of the feeder during ascent. Ultimately, only screws with the correct posture (head upwards) can enter the orientation device through the outlet. Using a spiral vibratory feeder achieves automatic, continuous, and stable screw supply.

[0029] In one embodiment of the present invention, the orientation device includes a mounting body, a driving device, and an orientation mechanism; The mounting body is disposed on the frame and is used for mounting the drive device and the orientation mechanism; The drive device is used for conveying screws inside the mounting body; The orientation mechanism is used to adjust the screw to a specific direction of rotation.

[0030] In this embodiment, as Figure 6 As shown, the mounting body provides a foundation for the orientation device, and its internal structure includes channels for screw flow and positioning. The drive unit, acting as a power source, propels the screws into the mounting body along a specific path, ensuring they contact the orientation mechanism. The orientation mechanism then performs the final rotation adjustment, mechanically rotating the screws to a preset fixed angle. This separation of the conveying and orientation functions results in a clear overall structure, facilitating maintenance and adjustment.

[0031] In one embodiment of the present invention, the mounting body is provided with an L-shaped channel, the L-shaped channel having a T-shaped cross-section adapted to the shape of the screw, and the inlet of the L-shaped channel is connected to the output end of the material selection device.

[0032] In this embodiment, as Figure 7 As shown, the L-shaped channel includes a vertical inlet section and a horizontal outlet section, used to change the screw's conveying direction and save space on the rack. The T-shaped cross-section is designed to fit the screw's shape (large head diameter, small shank diameter), ensuring that the screw can only slide with its head facing upwards and shank facing downwards within the channel, preventing it from flipping or tilting and providing precise positioning for subsequent clamping and orientation.

[0033] In one embodiment of the present invention, the driving device includes a driving cylinder, a clamping block, and a pushing block; The drive cylinder is mounted on the mounting body, and the extension shaft of the drive cylinder is directly opposite the output section of the L-shaped channel. A mounting frame is provided below the L-shaped channel, and the clamping block is located inside the mounting frame. The mounting frame is connected to the telescopic shaft of the drive cylinder and reciprocates along the output section of the L-shaped channel under the drive of the drive cylinder. The clamping blocks include a first clamping block and a second clamping block. A tension spring is provided between the first clamping block and the second clamping block to bring the two clamping blocks together. A threaded hole for screw engagement is provided in the middle of the top surface of the two clamping blocks. The threaded hole is formed by the splicing of half holes on the two clamping blocks. The two clamping blocks are connected to the mounting frame by a support rod. The support rod passes through the clamping blocks, and the upper and lower ends of the support rod are slidably connected to the mounting frame. When the support rod slides in the mounting frame, the two clamping blocks move closer to each other or separate. A spring is sleeved on the support rod. Under the action of the spring, the two clamping blocks are located at the end of the support rod away from the L-shaped channel. The push block is located on the outside of the mounting frame. The mounting frame has an opening for the push block to pass through. The end of the push block facing the opening is set as a V-shaped surface. The V-shaped surface is directly opposite the joint position of the two clamping blocks. A spring is sleeved on the push block. When the drive cylinder drives the mounting frame to move to the end along the output section of the L-shaped channel, the push block is pressed and moved into the opening. The V-shaped surface acts on the two clamping blocks, thereby separating the two clamping blocks and facilitating the removal of the screws between the clamping blocks.

[0034] In this embodiment, as Figures 7-9 The diagram illustrates the overall structure and internal components of the drive unit. Initially, under the action of the tension spring, the first and second clamping blocks come together, their top half-holes forming a complete threaded hole. When a correctly oriented screw slides from the entrance section of the L-shaped channel (either via air delivery or the thrust of a subsequent screw from a vibrating plate) to the corner of the L-shape (i.e., the starting position of the output end), the orientation mechanism adjusts the screw's rotation (at this time, the screw's shank is confined within the threaded hole, unable to move up or down, but can be rotated). During adjustment, the threaded hole on the clamping block is positioned directly below the screw, and the screw's shank is screwed into the threaded hole, maintaining its orientation. After adjustment, the drive cylinder activates, its telescopic shaft pushing the mounting bracket and the clamping blocks housed within it towards the end of the L-shaped channel's output section. During the movement, when the mounting bracket reaches the end of the output section, the end of the push block contacts the fixed blocking part on the frame or mounting body. As the drive cylinder continues to apply thrust, the push block moves relative to the mounting bracket into the opening. Its V-shaped end inserts into the gap between the first and second clamping blocks, overcoming the tension of the tension spring and opening the two clamping blocks, thus opening the threaded hole. At this time, the automatic electric screwdriver can easily pick up the oriented screw from the clamping blocks through the negative pressure of the air sleeve. When the drive cylinder retracts, the push block resets under the action of the spring, and the clamping blocks also close again under the action of the tension spring, waiting for the next screw. Through the above purely mechanical structure, the screw conveying, clamping, and releasing are fully automated, requiring no additional sensor control and exhibiting extremely high reliability.

[0035] In one embodiment of the present invention, the orientation mechanism includes a rotating rod, an orientation motor, and an orientation cylinder; The rotating rod is rotatably mounted on the mounting body and is rotatably connected to the mounting body. The bottom end of the rotating rod is shaped to match the screw slot. A return spring is provided on the rotating rod to separate the rotating rod from the screw. A gear is provided on the rotating rod. The directional motor is fixed relative to the mounting body. A drive gear is provided on the output shaft of the directional motor. The drive gear meshes with the driven gear on the rotating rod, and the thickness of the drive gear is greater than the thickness of the driven gear on the rotating rod. The directional cylinder is located at the top of the rotating rod. A pressure block is provided on the telescopic shaft of the directional cylinder. The pressure block has a first helical notch. The top of the rotating rod has a second helical notch that mates with the first helical notch. A spring is sleeved between the pressure block and the top of the rotating rod.

[0036] In this embodiment, as Figure 10 , Figure 11 The diagram illustrates the overall structure of the orientation mechanism. After the screw is fed to the corner of the L-shaped channel, it aligns with the threaded hole of the clamping block. The orientation cylinder is activated, its telescopic shaft extends, and it pushes the pressure block downwards. The first helical notch on the pressure block contacts the second helical notch at the top of the rotating rod. Under the action of the orientation motor, the rotating rod rotates, causing the first and second helical notches to rotate relative to each other (the protrusion of the first helical notch gradually slides from the concave point of the second helical notch to the protrusion of the second helical notch, at which point the downward pressure is at its maximum; then, under the action of the return spring, the protrusion of the first helical notch instantly falls back to the concave point of the second helical notch, at which point the downward pressure is at its minimum; the return spring can be set at the lower part of the gear of the rotating rod, and its elastic force is greater than that of the spring sleeved between the pressure block and the top of the rotating rod; the spring sleeved between the pressure block and the top of the rotating rod is used to smooth the downward pressure process, but it cannot overcome the elastic force of the return spring to press the rotating rod down. The downward pressure of the rotating rod relies on the two helical notches). The spring can actually be omitted without affecting the working process. The rotating rod periodically rises and falls while rotating, with both rises and falls occurring at fixed angles. During the downward pressure of the rotating rod, its bottom end (shaped to match the screw slot, such as a slotted or Phillips head) moves downward and rotates. When it aligns with the screw slot, it inserts into the screw slot, causing the screw to screw into the threaded hole of the clamping block. Since the screw cannot move axially, this process causes the bottom clamping block to move. When it rotates to a specific angle, the rotating rod rises under the action of the two helical notches. Because the fit between the first and second helical notches is fixed, the angle of rotation of the rotating rod when it rises is also fixed, thus keeping the screw slot at a specific angle. This process is repeated until the screw is screwed in to a certain depth, thus stabilizing its orientation. Then, the directional cylinder retracts, and the rotating rod rises upward under the action of the return spring. The thickness of the drive gear is greater than that of the driven gear on the rotating rod, ensuring that the two remain meshed during the up-and-down sliding of the rotating rod. This allows the orientation motor to drive the rotating rod to rotate at any time, compensating for any possible transmission backlash or initial angle deviation, and ensuring that the initial position is consistent in each orientation cycle. This purely mechanical orientation method is simple in structure, low in cost, and highly reliable. It is especially suitable for screws larger than M5 that are long and difficult to transport by air, avoiding the high cost and susceptibility to environmental interference associated with using photoelectric sensors or vision systems.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An online automatic screw machine, characterized in that, The online automatic screw machine includes a frame and a conveying mechanism, an automatic electric screwdriver, a material selection device, and a direction setting device mounted on the frame; The conveying mechanism is used to transport workpieces to enable continuous operation; The automatic electric screwdriver is used to pick up screws from the orientation device and place the screws into the workpiece; The material selection device is used to select screws and to guide the screws into the orientation device in a specific orientation. The orientation device is used to adjust the screw to a specific direction of rotation so that the screwdriver bit is aligned with the screw slot direction when the automatic electric screwdriver picks up the screw.

2. The online automatic screw machine according to claim 1, characterized in that, The conveying mechanism includes a first track and a second track; The first track and the second track are arranged side by side on the frame and both ends extend beyond the frame. The bottom of the first track and / or the second track is provided with a first slider, which slides in cooperation with the slide rail on the frame. A first screw is provided between the first track and the second track. The distance between the first track and the second track is adjusted by rotating the first screw to accommodate workpieces of different specifications.

3. The online automatic screw machine according to claim 1, characterized in that, The automatic electric screwdriver is mounted on a three-dimensional moving mechanism; The three-dimensional moving mechanism includes an X-axis moving mechanism, a Y-axis moving mechanism, and a Z-axis moving mechanism; The X-axis moving mechanism spans above the conveying mechanism, and the moving direction of the X-axis moving mechanism is perpendicular to the conveying direction of the conveying mechanism. The X-axis moving mechanism includes two parallel X-axis guide rails, and a second slider is provided on the X-axis guide rails. The second slider is driven to move by a second screw. The Y-axis moving mechanism is mounted on the Z-axis moving mechanism. The Y-axis moving mechanism includes a Y-axis guide rail, which is parallel to the conveying direction of the conveying mechanism. A third slider is mounted on the Y-axis guide rail and is driven to move by a third screw. The automatic electric screwdriver is mounted on the third slider. The Z-axis moving mechanism includes two vertical guide rails, the bottoms of which are respectively mounted on the second slider. A linear motor is installed inside each of the two vertical guide rails, and the sliding part of the linear motor is connected to one end of the Y-axis guide rail to drive the Y-axis guide rail to move up and down.

4. The online automatic screw machine according to claim 3, characterized in that, The automatic electric screwdriver includes a mounting plate, a pushing mechanism, and the screwdriver body. The mounting plate is disposed on the third slider; The pushing mechanism includes a pushing cylinder, a sliding plate, and a pushing guide rail. The pushing cylinder is fixed relative to the mounting plate. The actuating end of the pushing cylinder is connected to the sliding plate. The bottom of the sliding plate is slidably connected to the pushing guide rail via a slider. The pushing direction of the pushing cylinder is parallel to the moving direction of the Z-axis moving mechanism. The electric screwdriver body is mounted on the sliding plate and moves with the sliding plate.

5. The online automatic screw machine according to claim 4, characterized in that, An air sleeve is fitted onto the end of the electric screwdriver body. When not under force, the part of the electric screwdriver head protrudes outside the air sleeve. The air sleeve is connected to a negative pressure air source through a conduit to create a negative pressure inside the air sleeve for adsorbing screws.

6. The online automatic screw machine according to claim 1, characterized in that, The material selection device is located on the side of the frame away from the conveying mechanism, and the material selection device is a spiral vibrating plate.

7. The online automatic screw machine according to claim 1, characterized in that, The orientation device includes a mounting body, a driving device, and an orientation mechanism; The mounting body is disposed on the frame and is used for mounting the drive device and the orientation mechanism; The drive device is used for conveying screws inside the mounting body; The orientation mechanism is used to adjust the screw to a specific direction of rotation.

8. The online automatic screw machine according to claim 7, characterized in that, The mounting body is provided with an L-shaped channel, which has a T-shaped cross-section adapted to the shape of the screw, and the entrance of the L-shaped channel is connected to the output end of the material selection device.

9. The online automatic screw machine according to claim 8, characterized in that, The driving device includes a driving cylinder, a clamping block, and a pushing block; The drive cylinder is mounted on the mounting body, and the extension shaft of the drive cylinder is directly opposite the output section of the L-shaped channel. A mounting frame is provided below the L-shaped channel. The clamping blocks are disposed within the mounting frame, which is connected to the telescopic shaft of the drive cylinder. Driven by the drive cylinder, the clamping blocks reciprocate along the output section of the L-shaped channel. The clamping blocks include a first clamping block and a second clamping block. A tension spring is provided between the first and second clamping blocks to bring them together. A threaded hole for screw engagement is provided in the center of the top surface of the two clamping blocks. The threaded hole is formed by the abutment of half-holes on the two clamping blocks. The two clamping blocks are connected to the mounting frame by a support rod. The support rod passes through the clamping blocks, and its upper and lower ends are slidably connected to the mounting frame. When the support rod slides within the mounting frame, the two clamping blocks move closer to or separate from each other. A spring is sleeved on the support rod, and under the action of the spring, the two clamping blocks are located at the end of the support rod away from the L-shaped channel. The push block is located on the outside of the mounting frame. The mounting frame has an opening for the push block to pass through. The end of the push block facing the opening is set as a V-shaped surface. The V-shaped surface is directly opposite the joint position of the two clamping blocks. A spring is sleeved on the push block. When the drive cylinder drives the mounting frame to move to the end along the output section of the L-shaped channel, the push block is pressed and moved into the opening. The V-shaped surface acts on the two clamping blocks, thereby separating the two clamping blocks and facilitating the removal of the screws between the clamping blocks.

10. The online automatic screw machine according to claim 7, characterized in that, The orientation mechanism includes a rotating rod, an orientation motor, and an orientation cylinder; The rotating rod is rotatably mounted on the mounting body and is rotatably connected to the mounting body. The bottom end of the rotating rod is shaped to match the screw slot. A return spring is provided on the rotating rod to separate the rotating rod from the screw. A gear is provided on the rotating rod. The directional motor is fixed relative to the mounting body. A drive gear is provided on the output shaft of the directional motor. The drive gear meshes with the driven gear on the rotating rod, and the thickness of the drive gear is greater than the thickness of the driven gear on the rotating rod. The directional cylinder is located at the top of the rotating rod. A pressure block is provided on the telescopic shaft of the directional cylinder. The pressure block has a first helical notch. The top of the rotating rod has a second helical notch that mates with the first helical notch. A spring is sleeved between the pressure block and the top of the rotating rod.

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