A screw locking device

Abstract

This utility model discloses a screw fastening device, including a frame, a fastening mechanism for fastening workpieces with screws, a Y-axis drive unit for driving the fastening mechanism to reciprocate along the Y-axis, a primary Z-axis drive unit for driving the fastening mechanism to reciprocate along the Z-axis, a mounting frame, a material conveying mechanism, and a screw feeding mechanism mounted on the frame. The Y-axis drive unit is fixed on the mounting frame, the primary Z-axis drive unit is fixed on the movable end of the Y-axis drive unit, and the fastening mechanism is fixed on the movable end of the primary Z-axis drive unit. The material conveying mechanism is used to transport workpieces from the loading station to the processing station for screw fastening. After the workpieces have completed screw fastening, they are transported from the processing station to the unloading station for unloading. After the workpieces with completed screw fastening are removed, they return to the loading station for loading. This utility model features low initial investment costs and high production efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of product assembly, and in particular to a screw-locking device. Background Technology

[0002] The traditional operation mode of screw fastening equipment is as follows: the workpiece to be fastened is placed on the conveyor mechanism (loading), which then transports the workpiece from the loading station to the processing station, where the fastening mechanism performs the fastening process. After the fastening process is completed, the workpiece is then transported from the processing station to the unloading station. To improve production efficiency, additional conveyor and fastening mechanisms are typically added to the screw fastening equipment, thereby increasing the number of workpieces processed per cycle. However, adding multiple conveyor and fastening mechanisms introduces risks and challenges. The traditional screw-locking equipment suffers from several drawbacks. First, the loading and unloading processes are unified, meaning that during the loading process, the workpieces to be locked are installed one by one onto the conveyor mechanism of each loading station. Second, after the processing of each workpiece is completed, the workpieces are unloaded one by one from each conveyor mechanism (which may require a large number of personnel for unloading). This still results in long production times (long intervals between loading, processing and unloading processes) and high initial investment costs (labor costs).

[0003] Therefore, based on the above-mentioned technical problems, this application proposes a screw-locking device with low initial investment cost and high production efficiency. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a screw fastening device with low initial investment cost and high production efficiency.

[0005] To achieve the above objectives, this utility model provides a screw fastening device, comprising a frame, a fastening mechanism for fastening workpieces with screws, a Y-axis drive unit for driving the fastening mechanism to reciprocate along the Y-axis, a primary Z-axis drive unit for driving the fastening mechanism to reciprocate along the Z-axis, and a mounting frame, a material conveying mechanism, and a screw feeding mechanism mounted on the frame. The Y-axis drive unit is fixed to the mounting frame, the primary Z-axis drive unit is fixed to the movable end of the Y-axis drive unit, and the fastening mechanism is fixed to the movable end of the primary Z-axis drive unit. The material conveying mechanism is used to transport workpieces from the loading station to the processing station for screw fastening. After the screw fastening process is completed, the workpiece is conveyed from the machining station to the unloading station for unloading. After the workpiece with the screw fastening process completed is removed, it returns to the loading station for loading. The material conveying mechanism includes a primary guide rail arranged along the X-axis on the top surface of the frame, a platform slidably connected to the primary guide rail, and an X-axis drive unit arranged on the primary guide rail. The primary guide rail passes sequentially through the loading station, machining station, and unloading station along the X-axis, wherein the machining station is located directly below the fastening mechanism. The X-axis drive unit is used to drive the primary platform to reciprocate along the primary guide rail between the loading station, machining station, and unloading station. The platform is used to place the workpiece.

[0006] Furthermore, the frame is also provided with a protective shell for covering the mounting bracket and the locking mechanism. The protective shell has a primary clearance part and a secondary clearance part respectively opened on two opposite sides along the X-axis for the two ends of the primary guide rail to pass through.

[0007] Furthermore, the material handling mechanism also includes a starting device for controlling the start of the X-axis drive unit. By controlling the start of the X-axis drive unit through the starting device, the workpiece-bearing platform moves back and forth between the loading station, the processing station and the unloading station along the primary guide rail.

[0008] Furthermore, a primary position sensor is installed on the primary clearance section, which is used to detect whether a loading platform moves from the loading station to the processing station or whether a loading platform moves from the processing station to the loading station; a secondary position sensor is installed on the secondary clearance section, which is used to detect whether a loading platform moves from the unloading station to the processing station and whether a loading platform moves from the processing station to the unloading station.

[0009] Furthermore, the screw feeding mechanism uses an air-blowing feeding method to deliver screws one by one to the locking mechanism.

[0010] Furthermore, the fastening mechanism includes an electric screwdriver, a secondary Z-axis drive unit, a secondary guide rail, a primary sliding block, a secondary sliding block, and a feeder. The secondary guide rail is spaced along the X-axis on the movable end of the primary Z-axis drive unit. The electric screwdriver is slidably connected to the secondary guide rail via the primary sliding block, and the feeder is slidably connected to the secondary guide rail via the secondary sliding block. The electric screwdriver is located above the feeder. The rotating end of the electric screwdriver is movably inserted into a pre-set through hole in the feeder along the Z-axis. The feeder, under the action of the Y-axis drive unit and the secondary Z-axis drive unit, sequentially places the screws supplied by the screw feeding mechanism onto the screw holes to be fastened on the workpiece according to a preset route, and cooperates with the electric screwdriver to fasten the screws in each screw hole. The secondary Z-axis drive unit is fixed to the top of the movable end of the primary Z-axis drive unit, and the secondary Z-axis drive unit drives the primary sliding block to reciprocate along the secondary guide rail.

[0011] Furthermore, the locking mechanism also includes a support base disposed between the primary sliding block and the electric screwdriver, a connecting block disposed between the secondary sliding block and the feeder, a limiting block fixed to the bottom of the movable end of the primary Z-axis drive unit, and two buffer torsion springs respectively disposed on both sides of the connecting block. The support base is used for mounting the electric screwdriver. The limiting block has an overall C-shaped structure, and the connecting block has an overall L-shaped structure. The connecting block slides relative to the limiting block at the C-shaped opening. One end of each of the two buffer torsion springs is connected to the connecting block, and the other end is connected to the limiting block. The limiting block is used to stop and abut against the connecting block, and cooperates with the buffer torsion springs to relatively restrict the movement of the connecting block in the Z-axis direction.

[0012] Furthermore, the locking mechanism also includes a third-level position sensor and a fourth-level position sensor fixed on one side of the moving end of the first-level Z-axis drive unit. The third-level position sensor is used to detect the vertical displacement of the electric screwdriver, and the fourth-level position sensor is used to detect the distance between the locking mechanism and the workpiece locking surface. A feeding channel is formed on the outer circumference of the feeder. One end of the feeding channel extends to the through hole and the other end is connected to the screw feeding mechanism through a pre-set connecting pipe.

[0013] Furthermore, the screw-locking device also includes four movable wheels and four lifting and fixing feet located at the four corners of the bottom of the frame. The four movable wheels are used to provide the screw-locking device with movement function. After the screw-locking device moves to the destination, the four lifting and fixing feet are turned to extend downward along the Z-axis, so that the four movable wheels are away from the ground, thereby restricting the movement of the screw-locking device.

[0014] Furthermore, the screw fastening device also includes a teach pendant for controlling the fastening mechanism, the Y-axis drive unit, the first-stage Z-axis drive unit, the material handling mechanism, and the screw feeding mechanism. The teach pendant can generate screw fastening processing routes for workpieces of different specifications.

[0015] The present invention adopts the above-mentioned solution, and its beneficial effects are as follows: By setting up a material conveying mechanism, the workpiece moves linearly back and forth on the primary guide rail under the action of the loading stage and the X-axis drive unit. The loading and unloading processes do not interfere with each other, shortening the interval time between the loading, processing and unloading processes. Under the premise of ensuring the stable and orderly progress of screw fastening processing, the overall production efficiency is improved. Secondly, the fastening mechanism used in this embodiment is one unit. With the cooperation of the relevant drive units, the fastening mechanism can perform screw fastening processing on the workpiece transported at the loading station at the processing station, shortening the time required for subsequent maintenance of the fastening mechanism and reducing the investment cost (equipment manufacturing cost) and subsequent maintenance cost. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the screw-locking device in this embodiment. It is a front view.

[0017] Figure 2 This is a schematic diagram of the screw-locking device in this embodiment.

[0018] Figure 3 This is a side view of the screw-locking device in this embodiment.

[0019] Figure 4 This is a schematic diagram of the operation of the material conveying mechanism in this embodiment.

[0020] Figure 5 for Figure 4 A magnified schematic diagram of part A in the diagram.

[0021] Figure 6 This is a schematic diagram of the locking mechanism in this embodiment.

[0022] Figure 7 This is a schematic diagram of the locking mechanism in this embodiment.

[0023] Figure 8 This is a schematic diagram of the operation of the material conveying mechanism in this embodiment.

[0024] Figure 9 This is a schematic diagram of the operation of the material conveying mechanism in this embodiment.

[0025] Figure 10 This is a top view of the feeder in this embodiment.

[0026] Figure 11 for Figure 10A cross-sectional view of point BB in the diagram.

[0027] Among them, 1-frame, 11-mounting bracket, 12-protective shell, 121-primary clearance part, 1211-primary position sensor, 122-secondary clearance part, 1221-secondary position sensor, 2-locking mechanism, 21-electric screwdriver, 22-secondary Z-axis drive unit, 23-secondary guide rail, 24-primary sliding block, 25-secondary sliding block, 26-feeder, 261-through hole, 262-feeding channel, 27-support base, 271-positioning part, 28-connecting block, 281- 282-Sliding part, 283-Lower stop, 29-Limit block, 210-Buffer torsion spring, 3-First-stage Z-axis drive unit, 31-Third-stage position sensor, 32-Fourth-stage position sensor, 4-Material conveying mechanism, 41-First-stage guide rail, 42-Plate stage, 43-X-axis drive unit, 44-Starting device, 45-Loading station, 46-Processing station, 47-Unloading station, 5-Screw feeding mechanism, 6-Moving wheel, 7-Lifting fixed foot, 8-Teaching pendant, 9-Y-axis drive unit. Detailed Implementation

[0028] To facilitate understanding of this utility model, a more complete description of it is provided below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of the utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0029] See appendix Figure 1-11 As shown ( Figure 1 (Establishing an XYZ axis reference coordinate system) In this embodiment, a screw fastening device includes a frame 1, a fastening mechanism 2 for fastening workpieces with screws, a Y-axis drive unit 9 for driving the fastening mechanism 2 to reciprocate along the Y-axis, a primary Z-axis drive unit 3 for driving the fastening mechanism 2 to reciprocate along the Z-axis, and a mounting frame 11, a material conveying mechanism 4, and a screw feeding mechanism 5 mounted on the frame 1. The Y-axis drive unit 9 is fixed on the mounting frame 11, and the primary Z-axis drive unit 3 is fixed on the Y-axis drive unit 9. The mounting bracket 11 is mounted on the movable end of the first-stage Z-axis drive unit 3, and the locking mechanism 2 is fixed on the movable end of the first-stage Z-axis drive unit 3. The Y-axis drive unit 9 is located on any side of the mounting bracket 11 along the X-axis direction. Specifically, the mounting bracket 11 here is an inverted U-shaped structure (and the two vertical columns of the mounting bracket 11 span the material conveying mechanism 4 along the X-axis direction). The inverted U-shaped structure of the mounting bracket 11 can improve the load-bearing capacity of the mounting bracket 11 and provide a stable installation effect for the locking mechanism 2, so as to ensure the machining accuracy of the subsequent screw locking process and improve the output quality of the workpiece.

[0030] See appendix Figure 1-4As shown, the material conveying mechanism 4 is further used to transport the workpiece from the loading station 45 to the processing station 46 for screw fastening. After the screw fastening is completed, the workpiece is transported from the processing station 46 to the unloading station 47 for unloading. After the workpiece with the screw fastening completed is removed, it returns to the loading station 45 for loading. The material conveying mechanism 4 includes a primary guide rail 41 arranged along the X-axis on the top surface of the frame 1, a platform 42 slidably connected to the primary guide rail 41, and an X-axis drive unit 43 arranged on the primary guide rail 41. The primary guide rail 41 passes sequentially through the loading station 45, the processing station 46, and the unloading station 47 along the X-axis. The processing station 46 is located directly below the fastening mechanism 2 to ensure that the fastening mechanism 2 can handle the workpiece transported from the loading station 45 to the processing station 46. The workpiece at machining station 46 is screwed together. The X-axis drive unit 43 drives the primary stage 42 to move back and forth along the primary guide rail 41 between the loading station 45, machining station 46 and unloading station 47. The stage 42 is used to place the workpiece. Direct or indirect fixing can be used to temporarily install workpieces of different specifications on the stage 42 (the stage 42 is provided with connecting holes that can accommodate different specifications). Direct fixing means connecting the workpiece to the stage 42 with bolts or screws. Indirect fixing means installing auxiliary fixing parts on the stage 42 and then fixing the workpiece to the auxiliary fixing parts (solving the problem that some workpieces are difficult to connect directly to the stage 42 due to design limitations), thereby ensuring the stability of the workpiece.

[0031] It should be noted that the traditional operation mode of screw fastening equipment is as follows: the workpiece to be fastened is placed on the conveyor mechanism (loading), and the conveyor mechanism transports the workpiece from the loading station 45 to the processing station 46, where the fastening mechanism 2 performs the fastening processing; after the fastening processing is completed, the workpiece is then transported from the processing station 46 to the unloading station. To improve its production efficiency, a conveyor mechanism and a fastening mechanism 2 are generally added to the screw fastening equipment, thereby increasing the number of workpieces processed and output by the screw fastening equipment in a single operation. However, adding multiple conveyor mechanisms and fastening mechanisms... 2. At the same time, it has the disadvantages of high investment cost and high subsequent maintenance cost; secondly, the above-mentioned traditional screw fastening equipment has a unified loading and unloading process, that is, in the loading process, the workpieces to be fastened are installed one by one on the conveyor mechanism of each loading station 45; and after the processing of each workpiece is completed, the workpieces are unloaded one by one from each conveyor mechanism (which may also require a large number of personnel to unload), which still has the disadvantages of low production efficiency (long interval between loading, processing and unloading processes) and high initial investment cost (labor cost).

[0032] In this embodiment, by setting up the material conveying mechanism 4, the workpiece moves linearly back and forth on the primary guide rail 41 under the action of the platform 42 and the X-axis drive unit 43. The loading and unloading processes do not interfere with each other, shortening the interval time between the loading, processing and unloading processes. Under the premise of ensuring the stable and orderly progress of screw fastening processing, the overall production efficiency is improved. Secondly, the fastening mechanism 2 used in this embodiment is one unit. With the cooperation of the relevant drive unit, the fastening mechanism 2 can perform screw fastening processing on the workpiece transported at the loading station 45 at the processing station 46, shortening the time required for subsequent maintenance of the fastening mechanism 2 and reducing the investment cost (equipment manufacturing cost) and subsequent maintenance cost. Furthermore, the platform is provided with a set of connecting holes that can be adapted to different specifications to accommodate workpieces of different specifications, so that they can be fixed to the platform, improving the adaptability of the equipment.

[0033] See appendix Figure 1-4 As shown, the frame 1 is further provided with a protective shell 12 for covering the mounting frame 11 and the fastening mechanism 2. The protective shell 12 covers the mounting frame 11 and the fastening mechanism 2 on the processing station 46B, which can relatively reduce the influence of the external environment on the screw fastening process and ensure the stability of the screw fastening process. The protective shell 12 has a primary clearance part 121 and a secondary clearance part 122 on two opposite sides along the X-axis, which allow the two ends of the primary guide rail 41 to pass through each other. It should be noted that in order to improve the processing efficiency, the length of the primary guide rail 41 in the X-axis direction can be increased accordingly, so that the two ends of the primary guide rail 41 are exposed on the top surface of the frame 1, thereby providing sufficient working space for the operator or related feeding mechanism (an industrial robot with feeding / picking function).

[0034] See appendix Figure 1-4As shown, the material handling mechanism 4 further includes a starting device 44 for controlling the start of the X-axis drive unit 43. The starting device 44 controls the start of the X-axis drive unit 43, causing the platform 42 carrying the workpiece to reciprocate along the primary guide rail 41 between the loading station 45, processing station 46, and unloading station 47. Pressing the start button on the corresponding starting device 44 activates the X-axis drive unit 43, causing it to drive the movement of the platform 42 (achieving semi-automatic control). This ensures that the platform 42 remains safe and stationary during temporary installation or removal of unfinished workpieces, improving production safety. A primary position sensor 1211 is installed on the primary clearance section 121. 11 is used to detect whether the platform 42 has moved from the loading station 45 to the processing station 46 or whether the platform 42 has moved from the processing station 46 to the loading station 45; a secondary position sensor 1221 is installed on the secondary clearance part 122. The secondary position sensor 1221 is used to detect whether the platform 42 has moved from the unloading station 47 to the processing station 46 and whether the platform 42 has moved from the processing station 46 to the unloading station 47. Through the above-mentioned primary position sensor 1211 and secondary position sensor 1221, the specific position of the platform 42 can be effectively detected, ensuring that the platform 42 carrying the workpiece can be loaded, processed, unloaded and returned to the loading station in sequence according to the preset processing route, thus ensuring the orderly progress of production.

[0035] Furthermore, the screw feeding mechanism 5 uses an air-blowing feeding method to deliver screws one by one to the fastening mechanism 2. By using an air-blowing feeding method, screws of different specifications can be delivered one by one to the fastening mechanism 2 through a pre-set connecting pipe (not shown in the figure) to adapt to workpieces with different needs. It has the characteristics of strong adaptability, high efficiency and stable feeding effect.

[0036] See appendix Figure 4-7As shown, in this embodiment, the fastening mechanism 2 includes an electric screwdriver 21, a secondary Z-axis drive unit 22, a secondary guide rail 23, a primary sliding block 24, a secondary sliding block 25, and a feeder 26. The secondary guide rail 23 is spaced along the X-axis direction on the movable end of the primary Z-axis drive unit 22. The electric screwdriver 21 is slidably connected to the secondary guide rail 23 via the primary sliding block 24, and the feeder 26 is slidably connected to the secondary guide rail 23 via the secondary sliding block 25 (the primary sliding block 24 is located above the secondary sliding block 25). The electric screwdriver 21 is located above the feeder 26. The rotating end of the electric screwdriver 21 moves along the Z-axis direction through the feeder 26. In some through holes 261, the feeder 26, under the action of the Y-axis drive unit 9 and the secondary Z-axis drive unit 22, sequentially places the screws supplied by the screw feeding mechanism 5 onto the screw holes to be fastened on the workpiece according to a preset line, and cooperates with the electric screwdriver 21 to fasten the screws on each screw hole to be fastened; the secondary Z-axis drive unit 22 is fixed on the top of the movable end of the primary Z-axis drive unit 3, and the secondary Z-axis drive unit 22 is used to drive the primary sliding block 24 to reciprocate along the secondary guide rail 23, so that the electric screwdriver 21 performs intermittent lifting and lowering (providing entry space for the screws supplied by the screw feeding mechanism 5), so that the screws supplied by the screw feeding mechanism 5 slide into the feeder 26.

[0037] See appendix Figure 10-11 As shown, further, a feeding channel 262 is formed on the outer peripheral surface of the feeder 26. One end of the feeding channel 262 extends to the through hole 261 and the other end is connected to the screw feeding mechanism 5 through a pre-set connecting pipe. The specific working process is as follows: under the action of the relevant drive unit, the bottom end of the feeder 26 is aligned with a screw hole to be fastened on the workpiece. The secondary Z drive unit drives the electric screwdriver 21 to move upward along the Z-axis (until the rotating end of the electric screwdriver 21 is higher than the connection point of the feeding channel 262 in the through hole 261 and then stops. The purpose of this step is to provide sufficient space for the screw to enter the through hole 261). Then, the screw supplied by the screw feeding mechanism 5 falls onto the screw hole after passing through the connecting pipe, the feeding channel 262 and the through hole 261. Then, the secondary Z-axis drive unit 22 drives the electric screwdriver 21 to move downward along the Z-axis, thereby fastening the screw.

[0038] See appendix Figure 4-7As shown, in this embodiment, the locking mechanism 2 further includes a support base 27 disposed between the primary sliding block 24 and the electric screwdriver 21, a connecting block 28 disposed between the secondary sliding block 25 and the feeder 26, a limiting block 29 fixed to the bottom of the movable end of the primary Z-axis drive unit 3, and two buffer torsion springs 210 respectively disposed on both sides of the connecting block 28. The support base 27 is used for mounting the electric screwdriver 21 (arranging the electric screwdriver 21 along the Z-axis direction). The limiting block 29 has a C-shaped structure and is used to stop and abut against the connecting block 28, and cooperates with the buffer torsion springs 210 to relatively restrict the movement of the connecting block 28 in the Z-axis direction. The connecting block 28 has an L-shaped structure and is provided with an upper stop 281, a sliding part 282, and a lower stop 283. The connecting block 28 is connected to the sliding block through a pre-set through hole on the upper stop 281, and is connected to the feeder 26 through a pre-set connecting groove on the lower stop 283. The top surfaces are connected (the connecting groove extends along the X-axis direction, and the position of the feeder 26 can be further adjusted by adjusting the connection position between the feeder 26 and the connecting groove to ensure the accuracy of the equipment processing); the sliding part 282 of the connecting block 28 slides along the Z-axis at the C-shaped opening of the limiting block 29 (the connecting block 28 slides relative to the C-shaped opening of the limiting block 29), and the bottom surface of the upper stop part 281 and the top surface of the lower stop part 283 of the connecting block 28 are respectively connected to the limiting block 29. The top and bottom surfaces of block 29 (the bottom surface of limit block 29 serves as the upper limit for the connecting block 28, and the top surface of limit block 29 serves as the lower limit) stop and abut against each other, thereby limiting the connecting block 28. This prevents the vertical displacement caused by the contact between the bottom end of the feeder 26 and the workpiece to be locked and processed from pushing the feeder 26 to move excessively upward, deviating from the preset processing path, and causing the electric screwdriver 21 to move excessively downward, resulting in damage to the components (electric screwdriver 21 / workpiece).

[0039] See appendix Figure 4-7As shown, further, one end of each of the two buffer torsion springs 210 is connected to the connecting block 28 and the other end is connected to the limiting block 29. The limiting block 29 and the connecting block 28 are connected by the buffer springs. When the feeder 26 moves downward in the vertical direction and its bottom end contacts the workpiece, the elastic tendency of the buffer torsion springs 210 converts the vertical displacement generated by the feeder 26 contacting the workpiece into the elastic tendency of the buffer torsion springs 210, thereby reducing the vertical displacement of the feeder 26 (here, the top surface of the lower stop 283 of the connecting block 28 and the bottom surface of the limiting block 29 are provided). The stop block 281 of the connecting block 28 stops the upper surface of the limit block 29, thus preventing the feeder 26 from moving excessively upward. Furthermore, when the screw fastening process of the screw hole is completed, as the fastening mechanism 2 moves upward as a whole, the feeder 26 moves downward and resets along the Z-axis under the elastic drive of the buffer torsion spring 210 (until the bottom surface of the upper stop 281 of the connecting block 28 stops the upper surface of the limit block 29, thus preventing the feeder 26 from moving excessively downward). This avoids the vertical displacement caused by direct contact from damaging the secondary guide rail 23 or the sliding block, extending the service life of related parts and reducing subsequent maintenance costs.

[0040] See appendix Figure 4-7 As shown, in this embodiment, the locking mechanism 2 also includes a third-level position sensor 31 and a fourth-level position sensor 32 fixed to one side of the movable end of the first-level Z-axis drive unit 3. A positioning part 271 is protruding on one side of the support base 27 to cooperate with the second-level position sensor 1221 for detection and positioning. The third-level position sensor 31 is used to detect the vertical displacement of the electric screwdriver 21 to avoid excessive downward movement of the electric screwdriver 21 and damage to the workpiece electric screwdriver 21, thereby increasing the processing cost. The fourth-level position sensor 32 is used to detect the distance between the locking mechanism 2 and the workpiece locking processing surface, thereby achieving precise positioning and improving the processing accuracy of the equipment.

[0041] Furthermore, the screw-locking equipment also includes an alarm that is electrically connected to each of the aforementioned position sensors. The alarm is used to warn or sound a buzzer to the operator when the operating status of the corresponding component monitored by any position sensor exceeds the preset range, thereby ensuring stable and normal production and reducing the risk of accidents.

[0042] See appendix Figure 1-4 As shown, in this embodiment, the screw fastening device also includes four movable wheels 6 and four lifting and fixing feet 7 located at the four corners of the bottom of the frame 1. The four movable wheels 6 are used to provide the screw fastening device with movement function. After the screw fastening device moves to the destination, the four lifting and fixing feet 7 are turned to extend downward along the Z-axis, so that the four movable wheels 6 are away from the ground (the extension degree of individual lifting and fixing feet 7 can be adjusted according to the flatness of the actual ground to ensure that the entire screw fastening device operates in a stable state), thereby restricting the movement of the screw fastening device and enabling the screw fastening device to achieve precise processing in a stable state.

[0043] See appendix Figure 1 As shown, the screw fastening equipment further includes a teach pendant 8 for controlling the fastening mechanism 2, the Y-axis drive unit 9, the first-stage Z-axis drive unit 3, the material conveying mechanism 4, and the screw feeding mechanism 5. The operator can use the teach pendant 8 to debug the screw fastening equipment, customize processing routes for different workpieces, and perform manual operation, thereby improving the upper limit and multi-functionality of the screw fastening equipment. In addition, the workbench is also equipped with relevant control buttons and switches, including function keys for emergency stop, control object switching, manual control, and movement direction, which improves the operability of the screw fastening equipment.

[0044] To facilitate explanation, the following further explains the specific processing procedure of the screw-locking device in this embodiment.

[0045] (See appendix) Figure 4 , 8 (As shown in Figure 9) The specific workflow of the screw fastening device in this embodiment is as follows: After the operator or relevant loading mechanism at the loading station 45 installs the workpiece onto the platform 42, (by pressing the start device 44) the corresponding X-axis drive unit 43 drives the platform 42 to move along the primary guide rail 41 from the loading station 45 to the processing station 46 for screw fastening (at this time, when the primary position sensor 1211 detects that a workpiece has passed by, it will automatically execute the corresponding program to control the operation of the relevant drive unit, the platform 42, and the fastening mechanism 2, so that the platform 42 stops at the processing station 46, the fastening mechanism 2 moves downward along the Z-axis, and performs screw fastening on the workpiece); after the screw fastening on the workpiece is completed, the X-axis drive unit 43 drives the platform 42 to move along the primary guide rail 41 from the processing station 46 to the unloading station 47 for further processing. Unloading (at this time, when the secondary position sensor 1221 detects that a workpiece has passed by, it will automatically execute the corresponding program to control the operation of the relevant drive unit and the platform 42, so that the platform 42 stops at the unloading station 47, and the operator or relevant unloading mechanism at the unloading station 47 removes the workpiece from the platform 42); after the unloading process is completed, the X-axis drive unit 43 drives the platform 42 to return from the unloading station 47 to the loading station 45 along the primary guide rail 41 for loading (at this time, when the secondary position sensor 1221 and the primary position sensor 1211 detect that a workpiece has passed by in sequence, they will automatically execute the corresponding program to control the X-axis drive unit 43 to first speed up and then decelerate the platform 42, and finally make the platform 42 stop stably at the loading station 45). This cycle is repeated, thereby ensuring the improvement of overall production efficiency under the premise of stable and orderly production.

[0046] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any way. Any modifications or alterations made by those skilled in the art to the technical solution of this utility model without departing from its scope are equivalent embodiments of this utility model. Therefore, all equivalent changes made based on the concept of this utility model without departing from its scope should be covered within the protection scope of this utility model.

Claims

1. A screw-locking device, characterized in that: The machine includes a frame (1), a screw fastening mechanism (2) for screw fastening of workpieces, a Y-axis drive unit (9) for driving the screw fastening mechanism (2) to reciprocate along the Y-axis, a first-stage Z-axis drive unit (3) for driving the screw fastening mechanism (2) to reciprocate along the Z-axis, a mounting frame (11), a material conveying mechanism (4), and a screw feeding mechanism (5) mounted on the frame (1). The Y-axis drive unit (9) is fixed on the mounting frame (11), the first-stage Z-axis drive unit (3) is fixed on the movable end of the Y-axis drive unit (9), and the screw fastening mechanism (2) is fixed on the movable end of the first-stage Z-axis drive unit (3). The material conveying mechanism (4) is used to transport the workpiece from the loading station (45) to the processing station (46) for screw fastening, and after the workpiece has completed screw fastening, it is transported from the processing station (46) to the unloading station (47). 7) Unloading: After removing the workpiece that has completed the screw fastening process, return to the loading station (45) for loading. The material handling mechanism (4) includes a primary guide rail (41) arranged along the X-axis on the top surface of the frame (1), a platform (42) slidably connected to the primary guide rail (41), and an X-axis drive unit (43) arranged on the primary guide rail (41). The primary guide rail (41) passes through the loading station (45), the processing station (46), and the unloading station (47) in sequence along the X-axis. The processing station (46) is located directly below the fastening mechanism (2). The X-axis drive unit (43) is used to drive the primary platform (42) to move back and forth along the primary guide rail (41) between the loading station (45), the processing station (46), and the unloading station (47). The platform (42) is used to place the workpiece.

2. The screw-locking device according to claim 1, characterized in that: The frame (1) is also provided with a protective shell (12) for covering the mounting frame (11) and the locking mechanism (2). The protective shell (12) has a primary clearance part (121) and a secondary clearance part (122) respectively opened on two opposite sides along the X-axis for the two ends of the primary guide rail (41) to pass through.

3. The screw-locking device according to claim 1, characterized in that: The material handling mechanism (4) also includes a starting device (44) for controlling the start of the X-axis drive unit (43). By controlling the start of the X-axis drive unit (43) through the starting device (44), the workpiece-bearing platform (42) moves back and forth between the loading station (45), the processing station (46) and the unloading station (47) along the primary guide rail (41).

4. A screw-locking device according to claim 2, characterized in that: A primary position sensor (1211) is installed on the primary clearance section (121). The primary position sensor (1211) is used to detect whether the loading platform (42) moves from the loading station (45) to the processing station (46) or whether the loading platform (42) moves from the processing station (46) to the loading station (45). A secondary position sensor (1221) is installed on the secondary clearance section (122). The secondary position sensor (1221) is used to detect whether the loading platform (42) moves from the unloading station (47) to the processing station (46) and whether the loading platform (42) moves from the processing station (46) to the unloading station (47).

5. A screw-locking device according to claim 1, characterized in that: The screw feeding mechanism (5) uses an air-blowing feeding method to deliver screws one by one to the locking mechanism (2).

6. A screw-locking device according to claim 1, characterized in that: The locking mechanism (2) includes an electric screwdriver (21), a secondary Z-axis drive unit (22), a secondary guide rail (23), a primary sliding block (24), a secondary sliding block (25), and a feeder (26). The secondary guide rail (23) is spaced along the X-axis on the movable end of the primary Z-axis drive unit (3). The electric screwdriver (21) is slidably connected to the secondary guide rail (23) via the primary sliding block (24), and the feeder (26) is slidably connected to the secondary guide rail (23) via the secondary sliding block (25). The electric screwdriver (21) is located above the feeder (26). The rotating end of the feeder (26) moves along the Z-axis direction and passes through the pre-set through hole (261) of the feeder (26). The feeder (26) is used to place the screws supplied by the screw feeding mechanism (5) into the screw holes to be locked on the workpiece in sequence according to the preset line under the action of the Y-axis drive unit (9) and the secondary Z-axis drive unit (22), and to lock the screws on each screw hole to be locked with the electric screwdriver (21). The secondary Z-axis drive unit (22) is fixed on the top of the movable end of the primary Z-axis drive unit (3), and the secondary Z-axis drive unit (22) is used to drive the primary sliding block (24) to move back and forth along the secondary guide rail (23).

7. A screw-locking device according to claim 6, characterized in that: The locking mechanism (2) further includes a support base (27) between the primary sliding block (24) and the electric screwdriver (21), a connecting block (28) between the secondary sliding block (25) and the feeder (26), a limiting block (29) fixed to the bottom of the movable end of the primary Z-axis drive unit (3), and two buffer torsion springs (210) respectively disposed on both sides of the connecting block (28). The support base (27) is used for mounting the electric screwdriver (21), and the limiting block... (29) The whole is C-shaped, and the connecting block (28) is L-shaped. The connecting block (28) slides relative to the C-shaped opening of the limiting block (29). One end of the two buffer torsion springs (210) is connected to the connecting block (28) and the other end is connected to the limiting block (29). The limiting block (29) is used to stop and abut against the connecting block (28) and cooperate with the buffer torsion springs (210) to restrict the movement of the connecting block (28) in the Z-axis direction.

8. A screw-locking device according to claim 6, characterized in that: The locking mechanism (2) also includes a third-level position sensor (31) and a fourth-level position sensor (32) fixed on one side of the moving end of the first-level Z-axis drive unit (3). The third-level position sensor (31) is used to detect the vertical displacement of the electric screwdriver (21), and the fourth-level position sensor (32) is used to detect the distance between the locking mechanism (2) and the workpiece locking surface. The feeder (26) has a feeding channel (262) formed on its outer circumferential surface. One end of the feeding channel (262) extends to the through hole (261), and the other end is connected to the screw feeding mechanism (5) through a pre-set connecting pipe.

9. A screw-locking device according to claim 1, characterized in that: The screw fastening device also includes four movable wheels (6) and four lifting and fixing feet (7) located at the four corners of the bottom of the frame (1). The four movable wheels (6) are used to provide the screw fastening device with movement function. After the screw fastening device moves to the destination, the four lifting and fixing feet (7) are turned to extend downward along the Z-axis direction, so that the four movable wheels (6) are away from the ground, thereby restricting the movement of the screw fastening device.

10. A screw-locking device according to claim 1, characterized in that: The screw fastening device also includes a teach pendant (8) for controlling the fastening mechanism (2), the Y-axis drive unit (9), the first-level Z-axis drive unit (3), the material handling mechanism (4), and the screw feeding mechanism (5). The teach pendant (8) can generate screw fastening processing routes for workpieces of different specifications.

Images