A screw and nut assembly device

Abstract

This invention relates to the field of screw and nut assembly technology, and particularly to a screw and nut assembly device, comprising a frame, a work plate fixedly connected inside the frame, a loading station on the work plate, including a first robotic arm and a second robotic arm for orderly transporting pre-assembled screws and nuts, an assembly station on one side of the loading station for assembling the screws and nuts, and a detection component between the assembly station and the loading component for further inspection of the assembled screws and nuts, the assembly station including a turntable with a motor and a clamping component, the turntable being fixedly connected to the work plate, having several slots for limiting and clamping the nuts, and several chucks slidably connected to the underside of the turntable for clamping and positioning the screws. This invention aims to ensure the tightening accuracy of the screws and nuts, while reducing friction and interference between components, improving overall assembly efficiency and system stability.

Description

Technical Field

[0001] This invention relates to the field of screw and nut assembly technology, and particularly to a screw and nut assembly device. Background Technology

[0002] Currently, screws and nuts, as mass-produced components, have mature supporting production lines. These lines efficiently manufacture screws and nuts, ensuring production stability and quality. However, despite the high degree of automation in component production, component inspection, assembly, and subsequent operations are still primarily done manually. Currently, only a small number of automated devices on the market can perform single functions, such as visual inspection, but these devices cannot comprehensively cover the entire assembly and inspection process. In manual operation, low operator skill often leads to low assembly efficiency. For example, in the assembly of screws and sleeves, manual operation may require more time and effort and is prone to human error. This not only slows down the overall assembly speed but may also affect system stability and quality consistency. Summary of the Invention

[0003] The main objective of this invention is to provide a screw and nut assembly device that ensures the tightening accuracy of the screw and nut, while reducing friction and interference between components, thereby improving overall assembly efficiency and system stability.

[0004] To achieve the above objectives, the present invention proposes a screw and nut assembly device, comprising a frame, a work plate fixedly connected within the frame, a loading station on the work plate, the loading station including a first robotic arm and a second robotic arm for orderly transporting pre-assembled screws and nuts, an assembly station on one side of the loading station for assembling the screws and nuts, and a detection component between the assembly station and the loading assembly for further inspection of the assembled screws and nuts, the assembly station including:

[0005] A turntable equipped with a motor is fixedly connected to a work plate. The turntable has several slots for locking and clamping nuts. Several chucks are slidably connected to the underside of the turntable for clamping and positioning screws. A drive mechanism is fixedly connected to the turntable for driving and pushing one of the chucks.

[0006] A clamping assembly, located on one side of the turntable, is used to limit and clamp the screw and nut.

[0007] In one possible implementation, the clamping assembly includes:

[0008] A base is fixedly connected to a working plate. A double-headed cylinder is fixedly connected to the base. A first adjusting plate and a second adjusting plate are respectively telescopically connected to both ends of the double-headed cylinder. The first adjusting plate is used to tighten the nut. A snap-fit ​​post is rotatably connected to the second adjusting plate. The upper end of the snap-fit ​​post is fitted into the groove at the lower end of the screw. A transmission mechanism for driving the snap-fit ​​post is connected to the lower side of the snap-fit ​​post.

[0009] In one possible implementation, the transmission mechanism includes a transmission motor, which is fixedly connected to a second adjusting plate. A first synchronous pulley is fixedly connected to the drive shaft of the transmission motor, and a second synchronous pulley is coaxially fixedly connected to the lower end of the locking post. A synchronous belt is fitted onto the first and second synchronous pulleys.

[0010] In one possible implementation, a guide plate is coaxially fixedly connected to the lower side of the work plate, and a plurality of slide rails are fixedly connected to the conical surface of the guide plate, with each slide rail being slidably connected to each chuck.

[0011] In one possible implementation, both the first adjusting plate and the second adjusting plate are fixedly connected to a receiving plate on the side facing the double-headed cylinder.

[0012] In one possible implementation, the drive mechanism includes a drive cylinder, which is fixedly connected to the motor housing on the lower side of the turntable. The telescopic shaft of the drive cylinder is fixedly connected to a transmission block for ejecting the chuck on that side.

[0013] In one possible implementation, the first adjusting plate is provided with a clearance hole.

[0014] This invention's technical solution, through a clamping component, ensures a smooth assembly process, guaranteeing the precise tightening of the screw and nut. It also reduces friction and interference between components, improving overall assembly efficiency and system stability. Furthermore, the transmission mechanism not only provides a suitable mounting position for the drive motor but also enhances the installation efficiency of the screw and nut, thereby increasing assembly efficiency and reducing manual intervention during the assembly process. This makes the entire production line more efficient, precise, and stable. This automated optimization solution not only improves product quality but also reduces production costs and simplifies the installation process and structure. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of a screw and nut assembly device according to the present invention. Figure 1 ;

[0017] Figure 2 This is a schematic diagram of a screw and nut assembly device according to the present invention. Figure 2 ;

[0018] Figure 3 for Figure 2 Enlarged diagram of A in the middle;

[0019] Figure 4 This is a schematic diagram of a screw and nut assembly device according to the present invention. Figure 3 ;

[0020] Figure 5 for Figure 4 Enlarged diagram of B in the middle;

[0021] Figure 6 This is a schematic diagram showing the cooperation between the guide plate and the chuck in a screw and nut assembly device of the present invention;

[0022] Figure 7 This is a schematic diagram of a screw and nut assembly device according to the present invention. Figure 4 .

[0023] Explanation of icon numbers:

[0024] 11. Frame; 12. Work plate; 13. Turntable; 14. Slot; 15. Chuck; 21. Base; 22. Double-headed cylinder; 23. First adjusting plate; 231. Clearance hole; 24. Second adjusting plate; 25. Snap-fit ​​post; 26. Support plate; 31. Drive motor; 32. First synchronous pulley; 33. Second synchronous pulley; 34. Synchronous belt; 41. Guide plate; 42. Slide rail; 51. Drive cylinder; 52. Transmission block.

[0025] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0027] This invention proposes a screw and nut assembly device.

[0028] Reference Figures 1 to 7The system includes a frame 11, a work plate 12 fixedly connected inside the frame 11, a loading station on the work plate 12, and a first robot arm and a second robot arm for orderly transporting the assembled screws and nuts. An assembly station for assembling the screws and nuts is located on one side of the loading station. A detection component for further detection of the assembled screws and nuts is located between the assembly station and the loading component for further detection of the assembled screws and nuts.

[0029] The assembly station includes a turntable 13 with a motor, which is fixedly connected to the work plate 12. Several slots 14 for limiting and clamping nuts are formed on the turntable 13, and several chucks 15 for clamping and positioning screws are slidably connected to the lower side of the turntable 13. A drive mechanism for driving the chucks 15 on one side to move is fixedly connected to the turntable 13.

[0030] The assembly station also includes a clamping assembly for limiting and clamping the screw and nut, which is located on one side of the turntable 13;

[0031] With the assistance of the drive mechanism, the screw is moved between the first adjusting plate 23 and the second adjusting plate 24, and pushed towards the nut, ultimately ensuring precise engagement and coaxial alignment between the screw and the nut. At this time, the double-headed cylinder 22 in the clamping assembly drives the first adjusting plate 23 and the second adjusting plate 24 to move synchronously. Simultaneously, the locking pin 25 on the second adjusting plate 24 clamps the lower end of the screw and pushes it towards the nut in a spiral manner. Due to the limiting effect of the groove 14, the screw and nut maintain a relative rotational relationship—when the screw rotates, the screw and nut are securely tightened. The part of the screw that contacts the nut is equipped with a fitting groove, which effectively prevents over-rotation, ensuring precise connection and stable operation. The first adjusting plate 23 serves as a limit on the upper side of the nut to prevent it from falling off. After the nut is limited, to prevent the first adjusting plate 23 from restricting the free movement of the second adjusting plate 24 when clamping the upper end of the nut, the system is specially designed with an elastic element on the lower side of the first adjusting plate 23. This elastic component not only ensures the stable positioning of the nut but also effectively releases the restriction of the second adjusting plate 24, allowing it to move smoothly. The entire assembly process proceeds smoothly, ensuring the precision of the screw and nut tightening, while reducing friction and interference between components, improving overall assembly efficiency and system stability. Furthermore, under the action of the transmission mechanism, it not only provides a reasonable installation position for the drive motor 31 but also improves the installation efficiency of the screw and nut, thereby enhancing assembly efficiency and reducing manual intervention during the assembly process, making the entire production line more efficient, precise, and stable. This automated optimization scheme not only improves product quality but also reduces production costs.

[0032] Reference Figures 5 to 7The guide plate 41 is coaxially fixedly connected to the lower side of the working plate 12, and several slide rails 42 are fixedly connected to the conical surface of the guide plate 41. Each slide rail 42 is slidably connected to each chuck 15.

[0033] By employing the conical surface design of the guide plate 41, all chucks 15 connected to the slide rail 42 can automatically move towards the axis of the turntable 13 under their own weight without external force. This design not only allows the chucks 15 to automatically reset during installation but also effectively achieves a limit function, ensuring that the nuts and screws connected to the turntable 13 and chucks 15 do not interfere with each other during assembly. Because the chucks 15 can precisely reset, the installation position is optimized, providing sufficient operating space for the first and second robotic arms for more precise alignment and control. This improves the installation efficiency of screws and nuts, while also enhancing assembly efficiency, reducing manual intervention during assembly, and making the overall production line more efficient, precise, and stable. This automated optimization scheme not only improves product quality but also reduces production costs, driving the progress of automated manufacturing.

[0034] Reference Figures 5 to 7 The drive mechanism includes a drive cylinder 51, which is fixedly connected to the motor housing on the lower side of the turntable 13. The transmission block 52 used to push out the chuck 15 on this side is connected to the telescopic shaft of the drive cylinder 51.

[0035] The drive mechanism is preferably designed with a drive cylinder 51, which directly drives the chuck 15 to move to the clamping assembly side. By pushing outwards, it precisely aligns the screw on the chuck 15 with the nut above, ensuring coaxial connection. This not only ensures precise fit between the screw and nut but also enables tightening of the screw and nut through the clamping assembly, ensuring a firm and stable connection. Simultaneously, the telescopic shaft of the drive cylinder 51 automatically resets, and the chuck 15 slides down the conical surface of the guide plate 41 after being free from external force, effectively avoiding interference between the chuck 15 and the clamping assembly, ensuring smooth subsequent assembly. During this process, the clamping assembly continues to function, ensuring precise assembly of the nut and screw. As the turntable 13 rotates, the assembled nut and screw are further pushed, and then the assembled product is removed from the turntable 13 by either the first or second robotic arm. This ensures a highly efficient and smooth assembly process, minimizing manual intervention, improving automation, and consequently increasing assembly speed and accuracy.

[0036] Reference Figures 2 to 7 The clamping assembly includes:

[0037] The base 21 is fixedly connected to the working plate 12. The double-headed cylinder 22 is fixedly connected to the base 21. The two ends of the double-headed cylinder 22 are telescopically connected to the first adjusting plate 23 and the second adjusting plate 24 for tightening the nut, respectively. The locking post 25 is rotatably connected to the second adjusting plate 24. The upper end of the locking post 25 is fitted into the groove at the lower end of the screw.

[0038] With the assistance of the drive mechanism, the screw is moved between the first adjusting plate 23 and the second adjusting plate 24, and pushed towards the nut, ultimately ensuring precise engagement and coaxial alignment between the screw and the nut. At this time, the double-headed cylinder 22 in the clamping assembly drives the first adjusting plate 23 and the second adjusting plate 24 to move synchronously. Simultaneously, the locking pin 25 on the second adjusting plate 24 clamps the lower end of the screw and pushes it towards the nut in a spiral manner. Due to the limiting effect of the groove 14, the screw and nut maintain a relative rotational relationship—when the screw rotates, the screw and nut are securely tightened. The part of the screw that contacts the nut is equipped with a fitting groove, which effectively prevents over-rotation, ensuring precise connection and stable operation. The first adjusting plate 23 serves as a limit on the upper side of the nut to prevent it from falling off. After the nut is limited, to prevent the first adjusting plate 23 from restricting the free movement of the second adjusting plate 24 when clamping the upper end of the nut, the system is specially designed with an elastic element on the lower side of the first adjusting plate 23. This elastic element not only ensures the stable positioning of the nut but also effectively releases the restriction of the second adjusting plate 24, allowing it to move smoothly. The entire assembly process proceeds smoothly, ensuring the precision of tightening the screw and nut, while reducing friction and interference between components, thus improving overall assembly efficiency and system stability.

[0039] In addition, a transmission mechanism for driving the snap-fit ​​post 25 is connected to the lower side of the snap-fit ​​post 25;

[0040] The transmission mechanism not only provides a suitable mounting position for the drive motor 31, but also improves the installation efficiency of the screw and nut, thereby increasing assembly efficiency, reducing manual intervention during assembly, and making the overall production line more efficient, precise, and stable. This automated optimization scheme not only improves product quality but also reduces production costs.

[0041] Reference Figures 4 to 7 The transmission mechanism includes a transmission motor 31, which is fixedly connected to the second adjusting plate 24. The drive shaft of the transmission motor 31 is fixedly connected to the first synchronous pulley 32. The lower end of the snap-fit ​​post 25 is fixedly connected to the second synchronous pulley 33 on the same axis. The synchronous belt 34 is sleeved on the first synchronous pulley 32 and the second synchronous pulley 33.

[0042] Driven by the drive motor 31, the locking post 25 rotates, thereby driving the screws and nuts to perform a stable tightening operation. This design not only ensures a smooth and efficient tightening process between the screws and nuts, but also provides a reasonable installation position for the drive motor 31 through careful spatial layout. At the same time, the overall layout shortens the distance between the turntable 13 and the work plate 12, thereby reducing the overall structural volume. This effectively reduces the manufacturing cost of components, while also making the system structure more compact, reducing space waste, and improving production efficiency. By simplifying the design and avoiding unnecessary components, production costs are further reduced, assembly speed and accuracy are improved, and the efficient operation of the entire equipment is ensured.

[0043] Reference Figures 5 to 7 Two receiving plates 26 are respectively fixedly connected to the first adjusting plate 23 and the second adjusting plate 24 on the side facing the double-headed cylinder 22;

[0044] By adding a receiving plate 26 to the system, not only is a larger working stroke provided for the double-headed cylinder 22, but also a larger stroke model of the double-headed cylinder 22 can be selected for use. This significantly enhances the force exerted by the double-headed cylinder 22 on the first adjusting plate 23 and the second adjusting plate 24, effectively increasing the clamping force. Consequently, the positioning and clamping force between the screw and nut becomes stronger, ensuring a stable connection during assembly. Furthermore, the addition of the receiving plate 26 increases the installation distance between the screw and nut, providing more ample operating space and effectively reducing the risk of interference during installation, preventing interference between the first robot and the second robotic arm when clamping the screw or nut. This improves the accuracy and safety of the entire assembly process, avoids mechanical failures or operational difficulties caused by assembly problems, and enhances the system's automation level and work efficiency.

[0045] Reference Figures 4 to 7 An air-proof hole 231 is provided on the first adjusting plate 23;

[0046] By providing clearance holes 231 on the frame 11, users can easily observe the installation status of the screw and nut from the outside of the frame 11, and effectively ensure accurate alignment of the nut and screw during installation. Sufficient installation space is also provided for the mating of the nut and screw, thus avoiding mechanical damage or installation difficulties caused by over-assembly. Furthermore, providing observation space improves installation accuracy and efficiency. With the addition of visual monitoring equipment, users can check the assembly status in real time without disassembling some components, further reducing maintenance and adjustment costs.

[0047] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0048] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A screw and nut assembly device, comprising a frame (11), wherein a work plate (12) is fixedly connected inside the frame (11), and a loading station is provided on the work plate (12), the loading station including a first robot arm and a second robot arm for orderly transporting the pre-assembled screws and nuts, and an assembly station is provided on one side of the loading station for assembling the screws and nuts, wherein a detection component is provided between the assembly station and the loading component for further detection of the assembled screws and nuts, characterized in that, The assembly station includes: A turntable (13) with a motor is fixedly connected to a working plate (12). The turntable (13) has several slots (14) for limiting and clamping nuts. Several chucks (15) are slidably connected to the lower side of the turntable (13) for clamping and positioning screws. A drive mechanism is fixedly connected to the turntable (13) for driving and pushing one of the chucks (15). A clamping assembly is provided on one side of the turntable (13) for limiting and clamping the screw and nut; The clamping assembly includes: The base (21) is fixedly connected to the working plate (12). A double-headed cylinder (22) is fixedly connected to the base (21). The two ends of the double-headed cylinder (22) are respectively connected to a first adjusting plate (23) and a second adjusting plate (24). The first adjusting plate (23) is used to tighten the nut. A snap-fit ​​post (25) is rotatably connected to the second adjusting plate (24). The upper end of the snap-fit ​​post (25) is fitted into the slot at the lower end of the screw. A transmission mechanism for driving the snap-fit ​​post (25) is connected to the lower side of the snap-fit ​​post (25). The working plate (12) is coaxially fixedly connected to the lower side of the guide plate (41), and a number of slide rails (42) are fixedly connected to the conical surface of the guide plate (41). Each slide rail (42) is slidably connected to each chuck (15). The driving mechanism includes a driving cylinder (51), which is fixedly connected to the motor housing on the lower side of the turntable (13). The telescopic shaft of the driving cylinder (51) is fixedly connected to a transmission block (52) for ejecting the chuck (15) on that side.

2. The screw and nut assembly device according to claim 1, characterized in that, The transmission mechanism includes a transmission motor (31), which is fixedly connected to the second adjusting plate (24). A first synchronous pulley (32) is fixedly connected to the drive shaft of the transmission motor (31). A second synchronous pulley (33) is coaxially fixedly connected to the lower end of the snap-fit ​​post (25). A synchronous belt (34) is fitted on the first synchronous pulley (32) and the second synchronous pulley (33).

3. The screw and nut assembly device according to claim 1, characterized in that, The first adjusting plate (23) and the second adjusting plate (24) are both fixedly connected to the receiving plate (26) on the side facing the double-headed cylinder (22).

4. The screw and nut assembly device according to claim 1, characterized in that, The first adjusting plate (23) has a clearance hole (231).

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