A screw locking device

Abstract

This utility model discloses a screw-locking device, including a base plate, a column, a servo cylinder, a lifting frame, screw-locking machines, a screw wrench, and a positioning frame. The column is vertically fixed to the four corners of the top of the base plate. The servo cylinder is fixedly installed inside the column. The lifting frame is horizontally arranged, and its end is fixedly connected to the output end of the servo cylinder. The lifting frame slides in cooperation with the guide groove on the surface of the column. Multiple screw-locking machines are arranged in a matrix on the top of the lifting frame, and the output end of each screw-locking machine can be detachably connected to a screw wrench. Beneficial effects: The specially designed positioning frame achieves precise pre-positioning of the component to be screwed. The matching design of the positioning groove with the component contour allows for quick positioning and placement of the component, enhancing positioning stability. Combined with the elastic support structure of the guide column and the return spring, the positioning frame can slightly self-adapt to the component when the lifting frame presses down to lock the screw, further ensuring precise alignment of the screw wrench with the screw hole.

Description

Technical Field

[0001] This utility model relates to the field of automated assembly technology, and more specifically, to a screw-locking device. Background Technology

[0002] In the assembly process of manufacturing, screw fastening is a high-frequency and critical process. Its accuracy and efficiency directly affect the assembly quality and production capacity of products. With the acceleration of industrialization, the traditional manual screw fastening method has gradually become unable to meet the needs of modern mass production, and various automated screw fastening equipment has emerged.

[0003] However, existing automatic screw fastening devices still have many shortcomings in practical applications: Firstly, the problem of insufficient positioning accuracy is prominent. Most equipment only uses simple mechanical fixtures to roughly limit the positioning of the screw-locking components, lacking a dedicated pre-positioning structure. This makes the components prone to displacement due to external forces during the screw-locking process. Especially for small and complex workpieces, screw alignment deviations are very likely to occur, leading to problems such as stripped threads and damaged screw holes. This not only reduces the product qualification rate but also increases rework costs. For example, in the scenario of mobile phone motherboard assembly, the diameter of the micro screw holes on the motherboard is very small, and the screw-locking failure rate caused by inaccurate positioning of traditional equipment is high.

[0004] Secondly, the operating efficiency is limited, making it difficult to adapt to the needs of simultaneous assembly of multiple screw positions. Most existing equipment adopts a single screw machine and single station operation mode. Even for some multi-station equipment, the screw machine layout is fixed and the spacing is not adjustable, which can only adapt to the screw-locking needs of a single model of product. For workpieces with multiple screw-locking points, such as home appliance control panels and automotive sensor housings, it is necessary to achieve point-by-point locking through multiple movement of the equipment or switching of stations, resulting in an excessively long single screw-locking cycle. Utility Model Content

[0005] (a) Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides a multi-station automatic screw fastening device, which has the advantages of high positioning accuracy and synchronous operation of multiple stations, thereby solving the problems of large positioning deviation and low screw fastening efficiency of existing equipment.

[0006] (II) Technical Solution To achieve the advantages of high positioning accuracy and multi-station synchronous operation, the specific technical solution adopted by this utility model is as follows: A screw-locking device includes a base plate, a column, a servo electric cylinder, a lifting frame, a screw-locking machine, a screw wrench, and a positioning frame. The column is vertically fixedly connected to the four corners of the top of the base plate. The servo electric cylinder is fixedly installed inside the column. The lifting frame is horizontally arranged and its end is fixedly connected to the output end of the servo electric cylinder. The lifting frame slides in cooperation with the guide groove opened on the surface of the column. Multiple screw-locking machines are arranged in a matrix on the top of the lifting frame. The output end of each screw-locking machine can be detachably connected to a screw wrench. The positioning frame is located directly below the lifting frame. The four corners of the top of the positioning frame are movably connected to the base plate through guide posts. A return spring is sleeved on the outside of the guide post. A positioning groove adapted to the contour of the part to be screwed is opened on the surface of the positioning frame. One end of the guide post passes through the surface thread of the lifting frame and is fitted with a limit block. A return spring is sleeved on the outside of the guide post between the lifting frame and the positioning frame.

[0007] A control switch is provided on the outside of the column, and the control switch is electrically connected to the servo cylinder and screw motor.

[0008] The number of screw machines is multiple, and the multiple screw machines are arranged in an array on the lifting frame.

[0009] The two ends of the return spring abut against the top of the positioning frame and the bottom of the lifting frame, respectively.

[0010] The guide groove is arranged parallel to the column.

[0011] The positioning frame is made of aluminum alloy, and the edges of the positioning frame have a rounded corner transition structure.

[0012] (III) Beneficial Effects Compared with the prior art, the present invention provides a screw-locking device, which has the following advantages: (1) This utility model achieves precise pre-positioning of the locking wire component through a specially designed positioning frame. The matching design of the positioning groove and the component contour can quickly complete the positioning and placement of the component, which can enhance the positioning stability. With the elastic support structure of the guide column and the return spring, the positioning frame can be slightly adaptively adjusted with the component when the lifting frame presses down on the locking wire, further ensuring the precise alignment of the screw wrench and the screw hole.

[0013] (2) This utility model adopts a matrix layout of multiple screw machines, and the position of the screw machine can be flexibly adjusted according to the product screw position distribution to achieve synchronous fastening of multiple screw positions, effectively ensuring production continuity and adapting to the needs of mass production. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a structural schematic diagram of a screw-locking device according to an embodiment of the present utility model; Figure 2 yes Figure 1 A partial structural diagram; Figure 3 It is a structural diagram of the base plate, column, servo electric cylinder, lifting frame and guide groove.

[0016] In the picture: 1. Base plate; 2. Column; 3. Servo electric cylinder; 4. Lifting frame; 5. Guide groove; 6. Screwdriver; 7. Screw wrench; 8. Control switch; 9. Positioning frame; 10. Positioning groove; 11. Guide column; 12. Limit block; 13. Return spring. Detailed Implementation

[0017] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0018] According to an embodiment of the present invention, a screw-locking device is provided.

[0019] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments, such as... Figure 1-3 As shown, a screw-locking device according to an embodiment of the present invention includes a base plate 1, a column 2, a servo electric cylinder 3, a lifting frame 4, a screw-locking machine 6, a screw wrench 7, and a positioning frame 9. The core components of the screw-locking device in this embodiment of the utility model are clearly identified, and key structures such as the base plate 1 and the column 2 are listed to lay the foundation for the subsequent structural description.

[0020] Column 2 is vertically fixed to the four top corners of base plate 1. Connection relationship and position distribution between column 2 and base plate 1: Column 2 is fixed vertically at the four corners of the top of base plate 1, providing a stable support frame for the entire device and serving as the basis for subsequent installation of other components.

[0021] The servo electric cylinder 3 is fixedly installed inside the column 2. The installation position of the servo electric cylinder 3 is as follows: The servo electric cylinder 3 is fixed inside the column 2, which saves device space, can stably drive subsequent connected components, and avoids interference with external structures.

[0022] The lifting frame 4 is horizontally positioned and its end is fixedly connected to the output end of the servo electric cylinder 3. The lifting frame 4 is set up and connected to the following objects: The lifting frame 4 is in a horizontal state, and its end is fixed to the output end of the servo cylinder 3, so that the power of the servo cylinder 3 can be directly transmitted to the lifting frame 4 to drive it to achieve lifting action.

[0023] The lifting frame 4 and the guide groove 5 on the surface of the column 2 are in sliding fit; The relationship between the lifting frame 4 and the column 2 is described as follows: The column 2 has a guide groove 5 on its surface, and the lifting frame 4 is slidably fitted with it. The guide groove 5 can guide and limit the lifting movement of the lifting frame 4, ensuring that it moves smoothly along a fixed trajectory and preventing deviation.

[0024] Screw-making machines 6 are arranged in a matrix on top of the lifting frame 4. Description of the number and distribution of screw-making machines 6: There are multiple screw-making machines 6, arranged in a matrix on the top of the lifting frame 4. This distribution method is convenient to adapt to the distribution requirements of multiple screw positions of different products and provides conditions for synchronous screw locking of multiple workstations.

[0025] Each screwdriver 6 has a screw wrench 7 detachably connected to its output end; The connection between the screwdriver 6 and the screw wrench 7 is explained: Each screwdriver 6 output end is connected to a screw wrench 7, and the connection is detachable, which makes it easy to change the appropriate wrench according to the screw slot type, such as Phillips head or slotted head, thus improving the compatibility of the device.

[0026] Positioning frame 9 is located directly below lifting frame 4. The position of the positioning frame 9 is specified: The positioning frame 9 is located directly below the lifting frame 4, ensuring that when the lifting frame 4 descends, the screw wrench 7 on it can be accurately aligned with the screw hole of the component to be locked inside the positioning frame 9, which is the basis for accurate screw locking.

[0027] The top four corners of the positioning frame 9 are movably connected to the base plate 1 via guide posts 11. The connection between the positioning frame 9 and the base plate 1 is described as follows: The four top corners of the positioning frame 9 are movably connected to the base plate 1 through guide posts 11, so that the positioning frame 9 can move along the axis of the guide posts 11, providing the possibility for subsequent adaptive adjustment.

[0028] A return spring 13 is sleeved on the outer side of the guide post 11. The installation position of the return spring 13 is as follows: The return spring 13 is sleeved on the outside of the guide post 11. It can provide a restoring force after the positioning frame 9 is moved by force, so that it returns to its initial position and facilitates the next operation.

[0029] The positioning frame 9 has a positioning groove 10 on its surface that matches the contour of the component to be locked. The core structure and function of the positioning frame 9 are explained: The positioning frame 9 has a positioning groove 10 on its surface, the shape of which is adapted to the contour of the part to be locked, which can play a pre-positioning role for the part to be locked and prevent the part from shifting during the locking process.

[0030] One end of the guide column 11 passes through the surface thread of the lifting frame 4 and engages with the limit block 12. The relationship between the guide post 11, the lifting frame 4, and the limiting block 12 is described as follows: One end of the guide post 11 passes through the surface of the lifting frame 4 and is threadedly connected to the limiting block 12. The limiting block 12 can limit the descent stroke of the lifting frame 4 to prevent it from descending excessively and damaging the components.

[0031] A return spring 13 is sleeved between the lifting frame 4 and the positioning frame 9 on the outside of the guide column 11.

[0032] Another installation position and corresponding relationship of the supplementary reset spring 13: The guide post 11 between the lifting frame 4 and the positioning frame 9 is also fitted with a reset spring 13, which can play a buffering role between the two and assist the positioning frame 9 in resetting.

[0033] Please refer to Figure 1. A control switch 8 is provided on the outside of the column 2, and the control switch 8 is electrically connected to the servo cylinder 3 and the screw machine 6.

[0034] The control switch 8 is located on the outside of the column 2 for easy operation by the operator, and is electrically connected to the servo cylinder 3 and the screw machine 6, which can control the working status of both.

[0035] Please refer to Figures 1 and 2. There are multiple screw machines 6, and the multiple screw machines 6 are arrayed on the lifting frame 4.

[0036] Multiple screw-locking machines 6 are arranged in an array on the lifting frame 4, further clarifying that this layout can realize synchronous screw locking at multiple workstations and improve work efficiency.

[0037] Please refer to Figures 1 and 2. The two ends of the return spring 13 abut against the top of the positioning frame 9 and the bottom of the lifting frame 4, respectively.

[0038] The two ends of the return spring 13 abut against the top of the positioning frame 9 and the bottom of the lifting frame 4, respectively. When the lifting frame 4 descends, it can compress the return spring 13, and its elasticity can achieve the functions of buffering and resetting.

[0039] Please refer to Figures 1, 2, and 3. The guide groove 5 is set parallel to the column 2.

[0040] The guide groove 5 is parallel to the column 2 to ensure that the trajectory of the lifting frame 4 is parallel to the column 2 when it slides along the guide groove 5, thus ensuring that the lifting frame 4 is in a horizontal state and avoiding tilting that would affect the accuracy of the locking wire.

[0041] Please refer to Figures 1 and 2. The positioning frame 9 is made of aluminum alloy, and the edges of the positioning frame 9 have a rounded corner transition structure.

[0042] The positioning frame 9 is made of aluminum alloy, which combines lightweight and structural strength, making it easy to operate and ensuring positioning stability; the rounded corner transition structure at the edges can prevent operators from being bumped and injured or parts from being scratched.

[0043] Working principle: The screw wrench 7 at the output end of each screw machine 6 can accurately correspond to the screw hole position of the component. At the same time, the appropriate screw wrench 7 is changed according to the screw groove shape. Then, the lifting stroke of the servo electric cylinder 3 and the screw locking torque threshold of the screw machine 6 are preset by the control switch 8 on the outside of the column 2 to complete the initial debugging of the equipment.

[0044] During operation, the component to be locked is placed into the positioning groove 10 on the surface of the positioning frame 9. Since the positioning groove 10 matches the component's contour, the component can be quickly pre-positioned, preventing arbitrary displacement. After pressing the control switch 8, the control switch 8 sends a start signal to the servo cylinder 3, which begins operation. Its output drives the lifting frame 4 to slide downwards along the guide groove 5 on the surface of the column 2. The guide groove 5 is parallel to the column 2, ensuring the stability and horizontality of the lifting frame 4 during descent.

[0045] As the lifting frame 4 descends, its bottom gradually approaches the positioning frame 9, and the screw wrench 7 simultaneously moves towards the screw hole of the component to be screwed. Once the screw wrench 7 contacts the component surface, the lifting frame 4 continues to descend, compressing the return spring 13, which is sleeved on the outside of the guide post 11 between the lifting frame 4 and the positioning frame 9. The elastic force generated by the return spring 13 acts as a buffer, preventing a rigid collision between the screw wrench 7 and the component. During this process, the positioning frame 9 can move slightly downwards along the guide post 11, achieving adaptive adjustment through the elastic support structure of the guide post 11 and the return spring 13, further ensuring precise alignment between the screw wrench 7 and the screw hole.

[0046] Once the screwdriver 7 is aligned with the screw hole, the control switch 8 starts the screwdriver 6. The screwdriver 6 drives the screwdriver 7 to rotate, screwing the screw into the screw hole. During the tightening process, the control switch 8 monitors the torque value of the screwdriver 6 in real time. When the torque reaches a preset threshold, it indicates that the screw has been tightened, and the control switch 8 immediately stops the screwdriver 6 from rotating.

[0047] Subsequently, the servo cylinder 3 drives the lifting frame 4 to return to its original position along the guide groove 5. During the ascent of the lifting frame 4, the compressed return spring 13 gradually rebounds, pushing the positioning frame 9 upward along the guide post 11 and returning it to its initial position. At the same time, the limiting block 12 on the guide post 11 prevents the lifting frame 4 from rising excessively and disengaging from the guide post 11. Finally, the operator removes the completed wire-locking component from the positioning groove 10 of the positioning frame 9, and the next wire-locking operation can begin.

[0048] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0049] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A screw-locking device, comprising a base plate (1), a column (2), a servo electric cylinder (3), a lifting frame (4), a screw-locking machine (6), a screw wrench (7), and a positioning frame (9), characterized in that, The column (2) is vertically fixed to the four corners of the top of the base plate (1). The servo cylinder (3) is fixedly installed inside the column (2). The lifting frame (4) is horizontally set and its end is fixedly connected to the output end of the servo cylinder (3). The lifting frame (4) slides with the guide groove (5) opened on the surface of the column (2). Multiple screw machines (6) are provided and distributed in a matrix on the top of the lifting frame (4). Each screw machine (6) has a screw wrench (7) detachably connected to its output end. The positioning frame (9) is positioned... Directly below the lifting frame (4), the top four corners of the positioning frame (9) are movably connected to the base plate (1) through guide posts (11). A return spring (13) is sleeved on the outside of the guide post (11). A positioning groove (10) adapted to the contour of the component to be locked is opened on the surface of the positioning frame (9). One end of the guide post (11) passes through the surface of the lifting frame (4) and is threaded with a limit block (12). A return spring (13) is sleeved on the outside of the guide post (11) between the lifting frame (4) and the positioning frame (9).

2. A screw-locking device according to claim 1, characterized in that, A control switch (8) is provided on the outside of the column (2), and the control switch (8) is electrically connected to the servo electric cylinder (3) and the screw machine (6).

3. A screw-locking device according to claim 1, characterized in that, The number of screw machines (6) is multiple, and the multiple screw machines (6) are arrayed on the lifting frame (4).

4. A screw-locking device according to claim 1, characterized in that, The two ends of the reset spring (13) abut against the top of the positioning frame (9) and the bottom of the lifting frame (4), respectively.

5. A screw-locking device according to claim 1, characterized in that, The guide groove (5) is set parallel to the column (2).

6. A screw-locking device according to claim 1, characterized in that, The positioning frame (9) is made of aluminum alloy, and the edges of the positioning frame (9) are provided with a rounded corner transition structure.

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