A screw locking mechanism

Abstract

This utility model discloses a screw-locking mechanism, relating to the field of electric vehicle processing technology. It includes a fixed frame, a first fixing member, a second fixing member, a telescopic device, a tool gun, and a control system. The vehicle frame can be fixed to the fixed frame. The first fixing member is fixedly mounted on the fixed frame. The telescopic device is slidably mounted on the first fixing member, and the extension direction of the telescopic rod of the telescopic device is perpendicular to the sliding direction of the telescopic device. The second fixing member is fixedly connected to the telescopic rod of the telescopic device. The tool gun is slidably mounted on the second fixing member, and the sliding direction of the tool gun is perpendicular to both the extension direction of the telescopic rod and the sliding direction of the telescopic device. The output end of the tool gun can tighten the nut to be tightened, and under the action of the telescopic device, the tool gun can move closer to or away from the vehicle frame. Both the telescopic device and the tool gun are electrically connected to the control system. This utility model achieves high workpiece processing consistency and reduces the labor intensity of operators.

Description

Technical Field

[0001] This utility model relates to the field of electric vehicle processing technology, and in particular to a screw-locking mechanism. Background Technology

[0002] In the manufacturing process of two-wheeled electric vehicle frames, the principle is to follow modular production. Each component is connected by cutting, bending, flattening, drilling and welding, and finally tightening with screws. Currently, the screw tightening process is mainly carried out manually using hand-held pneumatic tools.

[0003] However, manual screw tightening has several drawbacks. First, due to the numerous assembly movements, the operator uses one hand to hold the top of the screw with a wrench while using the other hand to tighten the nut with a pneumatic tool. The tightening time depends entirely on the operator's experience, making it impossible to ensure consistent screw torque and compromising workpiece quality. Second, the pneumatic tool vibrates significantly during screw tightening, easily causing operator arm fatigue. Therefore, a screw tightening mechanism is urgently needed to address these technical problems. Utility Model Content

[0004] The purpose of this utility model is to provide a screw-locking mechanism to solve the problems existing in the prior art, so as to achieve high workpiece processing consistency and reduce the labor intensity of operators.

[0005] To achieve the above objectives, this utility model provides the following solution:

[0006] This utility model provides a screw-locking mechanism, including a fixed frame, a first fixed member, a second fixed member, a telescopic device, a tool gun, and a control system. The vehicle frame can be fixed on the fixed frame. The first fixed member is fixedly disposed on the fixed frame. The telescopic device is slidably disposed on the first fixed member, and the extension direction of the telescopic rod of the telescopic device is perpendicular to the sliding direction of the telescopic device. The second fixed member is fixedly connected to the telescopic rod of the telescopic device. The tool gun is slidably disposed on the second fixed member, and the sliding direction of the tool gun is perpendicular to the extension direction of the telescopic rod and the sliding direction of the telescopic device. The output end of the tool gun can tighten the nut to be tightened, and under the action of the telescopic device, the tool gun can move closer to or away from the vehicle frame. Both the telescopic device and the tool gun are electrically connected to the control system.

[0007] In some embodiments, the first fixing member is a first fixing plate, and the first fixing plate is horizontally disposed on the top of the fixing frame. The telescopic device is slidably disposed below the first fixing plate and can slide along a direction parallel to the length of the fixing frame. The second fixing member is a second fixing plate, and the second fixing plate is disposed perpendicular to the first fixing plate. The length direction of the second fixing plate is the same as the length direction of the fixing frame. The tool gun can slide along the height direction of the second fixing plate.

[0008] In some embodiments, the first fixing plate is provided with a first sliding groove extending along the length direction of the fixing frame, and the telescopic device is provided with a first guide post, which can pass through the first sliding groove and be locked by a locking member.

[0009] In some embodiments, the first groove has two lines in the width direction of the first fixed plate, and the telescopic device has two first guide posts.

[0010] In some embodiments, the tool gun is a pneumatic tool gun.

[0011] In some embodiments, a pressure regulating valve is also included, which is disposed on the air inlet pipe of the pneumatic tool gun and is electrically connected to the control system. The control system can adjust the opening of the pressure regulating valve to adjust the rotational speed of the pneumatic tool gun.

[0012] In some embodiments, an adjustment plate is also included, on which the tool gun is fixedly mounted. The adjustment plate is slidably mounted on the second fixing member and is capable of sliding along the height direction of the fixing frame.

[0013] In some embodiments, the second fixing plate is provided with a second sliding groove extending along the height direction of the fixing frame, and the adjusting plate is fixedly provided with a second guide post, which can pass through the second sliding groove and be locked by a locking member.

[0014] In some embodiments, a mounting plate is also included, the fixing bracket is fixedly disposed on the mounting plate, and the mounting plate is fixedly provided with a slot for locking the frame and restricting the movement of the frame.

[0015] In some embodiments, a lifting mechanism is also included, which is disposed on the fixed frame and whose output end can be fixedly connected to the vehicle frame. The opening of the slot faces upward, and the output end of the lifting mechanism can drive the vehicle frame to move up and down along the height direction of the fixed frame.

[0016] The present invention achieves the following technical advantages over the prior art:

[0017] The screw-locking mechanism provided by this utility model has a first fixing member fixedly mounted on a fixed frame. The extension direction of the telescopic rod of the telescopic device is perpendicular to the sliding direction of the telescopic device. A second fixing member is fixedly connected to the telescopic rod of the telescopic device. A tool gun is slidably mounted on the second fixing member, and the sliding direction of the tool gun is perpendicular to both the extension direction of the telescopic rod and the sliding direction of the telescopic device. The output end of the tool gun can tighten the nut to be tightened, and under the action of the telescopic device, the tool gun can move closer to or away from the frame. Both the telescopic device and the tool gun are electrically connected to the control system. Using a machine to operate the tool gun avoids manual operation, reducing the labor intensity of the operator. Moreover, by controlling the tool gun with the control system, the number of turns the tool gun makes to tighten the screw can be well controlled, ensuring that the screws of each frame and rear swingarm are well tightened and highly consistent. Attached Figure Description

[0018] 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.

[0019] Figure 1 This is a schematic diagram of the screw-locking mechanism from a first angle in some embodiments of this utility model;

[0020] Figure 2 This is a second-angle schematic diagram of the screw-locking mechanism in some embodiments of the present invention.

[0021] In the diagram: 1-fixed frame; 2-mounting plate; 3-frame; 4-screw holder; 5-first fixing plate; 51-first slide groove; 6-second fixing plate; 61-second slide groove; 7-tool gun; 8-adjusting plate; 9-telescopic device; 10-slot; 11-lifting mechanism. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] The purpose of this utility model is to provide a screw-locking mechanism to solve the problems existing in the prior art, so as to achieve high workpiece processing consistency and reduce the labor intensity of operators.

[0024] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] like Figures 1-2 As shown, this utility model provides a screw-locking mechanism, including a fixed frame 1, a first fixing member, a second fixing member, a telescopic device 9, a tool gun 7, and a control system. The frame 3 can be fixed to the fixed frame 1. The first fixing member is fixedly mounted on the fixed frame 1. The telescopic device 9 is slidably mounted on the first fixing member, and the extension direction of the telescopic rod of the telescopic device 9 is perpendicular to the sliding direction of the telescopic device 9. The second fixing member is fixedly connected to the telescopic rod of the telescopic device 9. The tool gun 7 is slidably mounted on the second fixing member, and the sliding direction of the tool gun 7 is perpendicular to both the extension direction of the telescopic rod and the sliding direction of the telescopic device 9. The output end of the tool gun 7 can tighten the nut to be tightened, and under the action of the telescopic device 9, the tool gun 7 can move closer to or further away from the frame 3. Both the telescopic device 9 and the tool gun 7 are electrically connected to the control system. The telescopic device 9 can slide on the first fixing member (X-axis), the extension direction of the telescopic rod is perpendicular to the sliding direction (Y-axis), and the sliding direction of the tool gun 7 on the second fixing member is perpendicular to both of the above (Z-axis), forming a three-axis linkage (XYZ). This design allows the tool gun 7 to precisely reach any screw hole on the frame 3 without requiring manual adjustment of the frame 3's posture, making it particularly suitable for complex structures with irregular screw distribution or limited space. Both the telescopic device 9 and the tool gun 7 are electrically connected to the control system, enabling automated positioning, tightening, and resetting via preset programs. Compared to manual operation, this reduces the time spent repeatedly picking up and placing tools and adjusting positions. The control system can precisely adjust the tightening torque and speed of the tool gun 7, ensuring consistent tightening force on each screw, avoiding the risk of part deformation due to overtightening or loosening due to undertightening, and improving the stability of product assembly quality. The fixing frame 1 secures the frame 3, and the first and second fixing components provide a rigid connection, keeping the telescopic device 9 and the tool gun 7 stable during movement and reducing the impact of vibration on tightening accuracy. In use: Place frame 3 into the tooling, clamp it manually, install the rear flat fork, thread the screw manually, install the washer and nut with one hand, tighten the nut into the screw two or three turns, and use a wrench to hold the top of the screw with the other hand. Start the control system, and the control system will control the tool gun 7 to start rotating. At the same time, the telescopic rod of the telescopic device 9 will drive the tool gun 7 forward. After a period of time, the tool gun 7 will stop rotating, and the cylinder will retract. One cycle is completed. Remove frame 3.

[0026] In some embodiments, the first fixing member is a first fixing plate 5, which is horizontally disposed on the top of the fixing frame 1. The telescopic device 9 is slidably disposed below the first fixing plate 5 and can slide along a direction parallel to the length of the fixing frame 1. The second fixing member is a second fixing plate 6, which is perpendicular to the first fixing plate 5. The length direction of the second fixing plate 6 is the same as the length direction of the fixing frame 1. The tool gun 7 can slide along the height direction of the second fixing plate 6. The first fixing plate 5 is horizontally disposed below the top of the fixing frame 1, and the telescopic device 9 slides below it, lowering the center of gravity of the mechanism and avoiding occupying the space above the fixing frame 1. This design is suitable for installation below the conveyor belt of an assembly line or at a low workstation, and can complete screw tightening operations within a limited height.

[0027] In some embodiments, the first fixed plate 5 is provided with a first sliding groove 51 extending along the length of the fixed frame 1, and the telescopic device 9 is provided with a first guide post. The first guide post can pass through the first sliding groove 51 and be locked by a locking component. After the first guide post passes through the sliding groove, it is fixed by locking components such as bolts and nuts. After tightening, the contact surface between the first guide post and the first sliding groove 51 generates friction, ensuring that the telescopic device 9 will not shift due to vibration or external force during operation. Some locking components can be designed as hand-tightening nuts or quick-clamp structures, allowing operators to slide the first guide post to adjust its position without tools such as wrenches, which is suitable for scenarios with frequent production line changes. Moreover, millimeter-level graduation lines can be engraved on the side of the first sliding groove 51, and the corresponding positions are marked on the first guide post. Operators can directly slide the first guide post to the specified graduation according to the frame 3 drawing, avoiding repeated trial and error and improving positioning efficiency. The first sliding groove 51 can adopt a standard structure such as a T-slot or dovetail slot made of aluminum or steel profiles, and the first guide post and locking component are general-purpose hardware components (such as cylindrical pins + hexagonal nuts).

[0028] In some embodiments, two first grooves 51 are provided in the width direction of the first fixed plate 5, and two first guide posts are provided on the telescopic device 9. The two grooves are distributed parallel to each other in the width direction of the first fixed plate 5 (e.g., one on each side), and the two guide posts are respectively embedded in the corresponding grooves to form a two-point support structure. Compared with single guide post single-point support, this design can evenly distribute the loads such as the weight of the telescopic device 9 and the tool gun 7, and the reaction force when tightening the screws, to the two guide posts, avoiding bending of the fixed plate caused by single-point force. A single guide post can only constrain the movement of the telescopic device 9 in the length direction (X-axis), while the double guide posts are set with a spacing in the width direction (Y-axis) to form a rectangular constraint, which can effectively prevent the telescopic device 9 from rotating and deviating around the Z-axis (perpendicular to the direction of the fixed plate). Moreover, the two grooves are equivalent to providing two parallel guide rails for the telescopic device 9. When the guide posts slide in the grooves, the synchronous movement of the guide posts on both sides can reduce lateral swaying.

[0029] In some embodiments, the tool gun 7 is a pneumatic tool gun. A pneumatic tool gun uses compressed air to drive a motor, which can reach rated torque instantly upon startup. Compared to the motor acceleration process of power tools, it accelerates much faster, making it suitable for scenarios requiring rapid tightening and offering higher tightening efficiency. It should be noted that the tool gun 7 can also be a power tool gun, or any other tool capable of tightening screws.

[0030] In some embodiments, the screw-locking mechanism further includes a pressure regulating valve, which is disposed on the air inlet pipe of the pneumatic tool gun and is electrically connected to the control system. The control system can adjust the opening degree of the pressure regulating valve to regulate the rotational speed of the pneumatic tool gun. Specifically, the control system adopts a PLC programming control program. By controlling the opening degree of the pressure regulating valve, the control system can adjust the air intake volume and air intake speed of the pneumatic tool gun, thereby adjusting the rotational speed of the pneumatic tool gun. The working process is as follows: Frame 3 is placed in the tooling and manually clamped. The rear horizontal fork is installed, and the screw is threaded manually. The right hand installs the washer and inserts the nut, tightening the nut two or three turns into the screw. The left hand uses a wrench to hold the top of the screw, and the right hand presses the start button on the control panel. The pneumatic tool gun starts rotating slowly (the speed is adjusted by the pressure regulating valve on the air circuit, which facilitates the locking socket on the pneumatic tool to engage with the nut). At the same time, the cylinder advances. After a certain period, the pressure regulating valve is adjusted to supply full flow of air to the pneumatic tool gun, which runs at full speed. The second timer starts. After the second time, the pneumatic tool gun stops rotating, and the cylinder retracts, completing one cycle. Frame 3 is then removed. After starting, the pneumatic tool gun rotates slowly initially to facilitate the precise engagement of the locking socket with the nut, preventing the socket from shifting due to high-speed rotation. Once the socket is locked, the PLC controls the pressure regulating valve to fully open, and the pneumatic tool gun tightens at full speed.

[0031] In some embodiments, the screw-locking mechanism further includes an adjusting plate 8. The tool gun 7 is fixedly mounted on the adjusting plate 8, which is slidably mounted on the second fixing member and can slide along the height direction of the fixing frame 1. The second fixing plate 6 of the screw-locking mechanism is provided with a second sliding groove 61 extending along the height direction of the fixing frame 1. A second guide post is fixedly mounted on the adjusting plate 8. The second guide post can pass through the second sliding groove 61 and be locked by the locking member. Moreover, millimeter-level scale lines can be engraved on the side of the second sliding groove 61, and corresponding marks are provided on the second guide post. The operator can directly slide the guide post to the specified scale according to the process requirements and fix it with the locking member to improve the positioning accuracy. By using two second guide posts (similar to the design of the first fixing plate 5), symmetrical support can be formed in the width direction, which evenly distributes the loads such as the gravity of the tool gun 7 and the tightening reaction force, reducing the tilt and sway of the adjusting plate 8.

[0032] In some embodiments, the screw-locking mechanism further includes a mounting plate 2, with a fixing bracket 1 fixedly mounted on the mounting plate 2. A slot 10 is fixedly provided on the mounting plate 2, used to hold the frame 3 and restrict its movement. The worker only needs to align the frame 3 with the slot 10 and press or push it in to complete the positioning, resulting in a fast operation. Furthermore, a rubber buffer pad can be installed on the inner wall of the slot 10 to absorb the impact force when the tool gun 7 tightens, preventing scratches on the surface of the frame 3; it also reduces vibration transmission to the mounting plate 2, extending the equipment's service life.

[0033] In some embodiments, the screw-locking mechanism further includes a lifting mechanism 11, which is mounted on the fixed frame 1. The output end of the lifting mechanism 11 is fixedly connected to the frame 3, with the opening of the slot 10 facing upwards. The output end of the lifting mechanism 11 can drive the frame 3 to move up and down along the height direction of the fixed frame 1. The lifting mechanism 11 can freely raise and lower the frame 3 in the height direction of the fixed frame 1, adapting to the screw tightening requirements of different vehicle models and different workstations. The same equipment can serve multiple height requirements of the production line. The frame 3 is first positioned horizontally through the slot 10, and then the lifting mechanism 11 performs height calibration to form a three-dimensional positioning, meeting the high-precision tightening requirements. It should be noted that both the telescopic device 9 and the lifting mechanism 11 can be hydraulic cylinders or electric cylinders, and multiple lifting mechanisms 11 can be provided to make the lifting of the frame 3 more stable. The lifting mechanism 11 is also connected to the control system via electrical signals.

[0034] As a preferred embodiment, the mounting bracket 1 is also provided with a screw receiving box 4, which is located on the opposite side of the mounting bracket 1, and the operator can easily take screws from the screw receiving box 4 for initial installation.

[0035] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A screw-locking mechanism, characterized in that: The system includes a fixed frame, a first fixing member, a second fixing member, a telescopic device, a tool gun, and a control system. The vehicle frame can be fixed to the fixed frame. The first fixing member is fixedly mounted on the fixed frame. The telescopic device is slidably mounted on the first fixing member, and the extension direction of the telescopic rod of the telescopic device is perpendicular to the sliding direction of the telescopic device. The second fixing member is fixedly connected to the telescopic rod of the telescopic device. The tool gun is slidably mounted on the second fixing member, and the sliding direction of the tool gun is perpendicular to the extension direction of the telescopic rod and the sliding direction of the telescopic device. The output end of the tool gun can tighten the nut to be tightened, and under the action of the telescopic device, the tool gun can move closer to or away from the vehicle frame. Both the telescopic device and the tool gun are electrically connected to the control system.

2. The screw-locking mechanism according to claim 1, characterized in that: The first fixing member is a first fixing plate, which is horizontally disposed on the top of the fixing frame. The telescopic device is slidably disposed below the first fixing plate and can slide along a direction parallel to the length of the fixing frame. The second fixing member is a second fixing plate, which is perpendicular to the first fixing plate. The length direction of the second fixing plate is the same as the length direction of the fixing frame. The tool gun can slide along the height direction of the second fixing plate.

3. The screw-locking mechanism according to claim 2, characterized in that: The first fixing plate is provided with a first sliding groove extending along the length direction of the fixing frame, and the telescopic device is provided with a first guide post, which can pass through the first sliding groove and be locked by a locking member.

4. The screw-locking mechanism according to claim 3, characterized in that: The first slide has two grooves in the width direction of the first fixed plate, and the telescopic device has two first guide posts.

5. The screw-locking mechanism according to claim 1, characterized in that: The tool gun is a pneumatic tool gun.

6. The screw-locking mechanism according to claim 5, characterized in that: It also includes a pressure regulating valve, which is installed on the air inlet pipe of the pneumatic tool gun and is electrically connected to the control system. The control system can adjust the opening of the pressure regulating valve to adjust the rotational speed of the pneumatic tool gun.

7. The screw-locking mechanism according to claim 2, characterized in that: It also includes an adjustment plate, on which the tool gun is fixedly mounted. The adjustment plate is slidably mounted on the second fixing member and can slide along the height direction of the fixing frame.

8. The screw-locking mechanism according to claim 7, characterized in that: The second fixing plate is provided with a second sliding groove extending along the height direction of the fixing frame, and the adjusting plate is fixedly provided with a second guide post, which can pass through the second sliding groove and be locked by a locking member.

9. The screw-locking mechanism according to claim 1, characterized in that: It also includes a mounting plate, on which the fixing bracket is fixedly mounted. The mounting plate is fixedly provided with a slot for locking the frame and restricting the movement of the frame.

10. The screw-locking mechanism according to claim 9, characterized in that: It also includes a lifting mechanism, which is mounted on the fixed frame and whose output end can be fixedly connected to the vehicle frame. The opening of the slot faces upward and the output end of the lifting mechanism can drive the vehicle frame to move up and down along the height direction of the fixed frame.

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