Semi-automatic screw tightening device based on proximity switch positioning

Abstract

The utility model provides a semi-automatic screw tightening device based on proximity switch positioning, which belongs to the technical field of screw tightening and comprises a workbench, a workpiece arranged on the workbench, a signal processing system corresponding to the workbench and a plurality of proximity switches arranged on the workbench and connected with the signal processing system. A tightening gun used for tightening a workpiece screw and a metal base used for making contact with the proximity switch are arranged on the workbench, a telescopic rod used for driving the metal base to stretch out and draw back is arranged on the metal base, and a moving mechanism used for driving the tightening gun and the metal base to move together is further arranged on the workbench. According to the utility model, accurate positioning can be realized through matching of the proximity switch and the metal seat, so that the fool-proof effect in production operation can be achieved, the situation that the position is wrong when the screw is tightened by the tightening gun can be avoided, and the production efficiency is improved. Working efficiency of screw tightening is improved, and product quality is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of screw tightening technology, specifically to a semi-automatic screw tightening device based on proximity switch positioning. Background Technology

[0002] Currently, in China's manufacturing industry, screws are often used to fasten and fix workpieces. This is especially suitable for semi-automatic assembly lines that require precise positioning for screw fastening, such as electronic product assembly and automotive parts assembly. The quality of screw connections directly affects the reliability and safety of products and plays a crucial role in product quality. Currently, screw tightening devices can be used to ensure the quality of screw tightening on workpieces.

[0003] Existing screw tightening devices typically involve operators holding a tightening gun to tighten screws on workpieces. However, errors can easily occur during long-term screw tightening, potentially resulting in screws being left untightened. This is detrimental to the error-proofing effect during production operations and cannot guarantee accurate positioning of the tightening position. Operators need to repeatedly confirm that the tightening gun aligns with the screw hole on the workpiece before tightening, which is inefficient and affects product quality. Utility Model Content

[0004] In view of this, the present invention provides a semi-automatic screw tightening device based on proximity switch positioning, which can achieve precise positioning by cooperating with the metal base through the proximity switch, which is beneficial to achieving the error-proof effect in production operations, can avoid the situation of incorrect positioning when tightening screws with a tightening gun, improve the work efficiency of screw tightening, and ensure product quality.

[0005] To solve the above-mentioned technical problems, this utility model provides a semi-automatic screw tightening device based on proximity switch positioning. It includes a worktable with a workpiece on it, a signal processing system corresponding to the worktable, several proximity switches connected to the signal processing system on the worktable, a tightening gun for tightening the workpiece screw, and a metal base for contacting the proximity switches. The metal base has a telescopic rod for extending and retracting it. A moving mechanism that moves the tightening gun and the metal base together is also provided on the worktable. The position where the metal base contacts the proximity switch is the same as the position and distance where the tightening gun tightens the workpiece screw, ensuring complete synchronization of their movement trajectories. When the metal base contacts the proximity switch, the signal processing system confirms that the device has reached the working area. This not only achieves precise positioning during screw tightening but also avoids missing screws. At this point, the tightening gun is aligned with the screw hole on the workpiece. The tightening gun start button is manually pressed to tighten the screw. Similarly, the device continues to move to the second proximity switch position and repeats the above actions to complete the screw tightening.

[0006] The moving mechanism includes a fixed rod set on the worktable, a connecting plate sleeved on the fixed rod, and the connecting plate can drive the tightening gun and the metal seat to rotate and move up and down on the fixed rod. The connecting plate is an L-shaped plate, and the fixed rod is located at the center hole of the horizontal plate of the L-shaped plate.

[0007] Two connecting rods are slidably mounted on the connecting plate. The connecting rods can drive the tightening gun and the metal seat to slide together on the connecting plate. The connecting rods slide within the sliding holes of the L-shaped plate side plate.

[0008] A fixing part is provided on one end of the connecting rod. The fixing part has a round hole for placing the tightening gun. The fixing part includes a support plate and a clamping plate. The support plate is fixed together with the two connecting rods. A screw is provided on the clamping plate. The screw is threaded into the threaded hole of the support plate. The tightening gun is located at the round hole between the clamping plate and the support plate.

[0009] A connecting frame is provided at the other end of the connecting rod. The connecting frame has a mounting hole, and the telescopic rod is provided with a mounting seat installed in the mounting hole for connecting the metal seat to the connecting frame.

[0010] A pull rope is installed at the top of the fixed rod. The pull rope is connected to the connecting plate. After the tightening gun finishes its work, the pull rope can pull the connecting plate upward to spring back to its original position.

[0011] A bracket is installed on the workbench, and the proximity switch is located on the top plate of the bracket.

[0012] The bottom of the bracket is connected to the worktable with screws. The proximity switch can be adjusted to correspond with the screw position of different workpieces by replacing the bracket. The middle part of the bracket is a support column with a certain height, which makes it easy to disassemble the bracket.

[0013] The workbench is equipped with a placement platform for placing workpieces.

[0014] In summary, compared with the prior art, this application includes at least one of the following beneficial technical effects:

[0015] 1. When this utility model is used, it can achieve precise positioning by cooperating with the proximity switch and the metal base, which is conducive to achieving the effect of preventing mistakes in production operations. It can avoid the situation of incorrect positioning when tightening screws with a tightening gun, improve the work efficiency of tightening screws, and ensure product quality.

[0016] 2. When this utility model is used, the movement trajectory of the metal seat and the tightening gun are completely synchronized, and the trigger position corresponds strictly to the screw hole position, thus eliminating the risk of misalignment from a physical structure perspective.

[0017] 3. When using this utility model, the proximity switch layout can be quickly adjusted by changing the bracket, adapting to workpieces with different screw hole distributions, and it has strong versatility.

[0018] 4. When this utility model is used, the proximity switch triggers and automatically confirms the positioning, reducing the time for repeated manual alignment. The automatic rebound of the pull rope shortens the reset time, improves the work cycle, forces the process to be standardized, and avoids omissions or misoperations. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is an enlarged structural schematic diagram of the moving mechanism of this utility model;

[0021] Figure 3 This is an enlarged structural schematic diagram of the proximity switch of this utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the side of the placement platform of this utility model;

[0023] Figure 5 This is a schematic diagram of the working process of the tightening gun of this utility model.

[0024] Explanation of reference numerals in the attached drawings: 100, workbench; 201, placement platform; 202, workpiece; 300, moving mechanism; 301, fixed rod; 302, connecting plate; 303, connecting rod; 304, fixing part; 305, connecting frame; 400, tightening gun; 501, metal base; 502, telescopic rod; 601, bracket; 602, proximity switch. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the following will be described in conjunction with the accompanying drawings of the embodiments of this utility model. Figure 1-5 The technical solutions of the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model are within the protection scope of this utility model.

[0026] According to one embodiment of the present invention, such as Figure 1 , Figure 2 and Figure 3As shown: This embodiment provides a semi-automatic screw tightening device based on proximity switch positioning, including a worktable 100, on which a workpiece 202 is disposed. A signal processing system corresponding to the worktable 100 is also provided. Several proximity switches 602 connected to the signal processing system are disposed on the worktable 100. A tightening gun 400 for tightening the screws of the workpiece 202 and a metal base 501 for contacting the proximity switches 602 are disposed on the worktable 100. A telescopic rod 502 for extending and retracting the metal base 501 is disposed on the metal base 501. A moving mechanism 300 for moving the tightening gun 400 and the metal base 501 together is also provided on the worktable 100. The position where the metal base 501 contacts the proximity switches 602 is the same as the position where the tightening gun 400 tightens the workpiece. The positions and distances of the 202 screws are the same, ensuring that their movement trajectories are completely synchronized. When the metal base contacts the proximity switch 602, the signal processing system confirms that the device has reached the working area. This not only enables precise positioning when tightening the screws but also prevents screws from being missed. At this time, the tightening gun 400 is precisely aligned with the 202 screw hole on the workpiece. The start button of the tightening gun 400 is manually pressed to tighten the screw. Similarly, the movement continues to the second proximity switch 602 position, and the above actions are repeated to complete the screw tightening action. If the proximity switch 602 is not reached, or if the proximity switch 602 is not reached in the sequence set by the program, the tightening gun 400 will lock and cannot move, which has a foolproof function. The proximity switch 602 can be used to achieve precise positioning of the screw hole position.

[0027] Furthermore, the moving mechanism 300 includes a fixed rod 301 mounted on the worktable 100, a connecting plate 302 sleeved on the fixed rod 301, the connecting plate 302 can drive the tightening gun 400 and the metal seat 501 to rotate and move up and down on the fixed rod 301, the connecting plate 302 is an L-shaped plate, and the fixed rod 301 is located at the center hole of the horizontal plate of the L-shaped plate.

[0028] Furthermore, two connecting rods 303 are slidably provided on the connecting plate 302. The connecting rods 303 can drive the tightening gun 400 and the metal seat 501 to slide together on the connecting plate 302. The connecting rods 303 slide in the sliding hole of the L-shaped plate side plate.

[0029] It is worth mentioning that a pull rope is provided at the top of the fixed rod 301, and a traction ring is provided on the connecting plate 302. The pull rope is connected to the connecting plate 302 through the traction ring. After the tightening gun 400 completes the operation, the pull rope can pull the connecting plate 302 to spring back to its original position.

[0030] According to another embodiment of the present invention, such as Figure 2 and Figure 3As shown, a fixing part 304 is provided on one end of the connecting rod 303. The fixing part 304 has a round hole for placing the tightening gun 400. The fixing part 304 includes a support plate and a clamping plate. The support plate is fixed together with the two connecting rods 303. A screw is provided on the clamping plate. The screw is threaded into the threaded hole of the support plate. The tightening gun 400 is located at the round hole between the clamping plate and the support plate.

[0031] Furthermore, a connecting frame 305 is provided on the other end of the connecting rod 303. The connecting frame 305 has an installation hole. The telescopic rod 502 is provided with a mounting seat installed in the mounting hole, which is used to connect the metal seat 501 to the connecting frame 305. The distance between the metal seat 501 and the tightening gun 400 can be adjusted by moving the mounting seat in the mounting hole.

[0032] Furthermore, a bracket 601 is provided on the workbench 100, and a proximity switch 602 is located on the top plate of the bracket 601.

[0033] Furthermore, the bottom of the bracket 601 is connected to the workbench 100 by screws. The screw positions of the proximity switch 602 and different workpieces 202 can be adjusted by replacing the bracket 601. The middle part of the bracket 601 is a support column with a certain height, which facilitates the metal seat 501 to contact the proximity switch 602 and makes it easy to disassemble the bracket 601.

[0034] Furthermore, such as Figure 4 As shown, the worktable 100 is provided with a placement platform 201 for placing the workpiece 202.

[0035] It should be clarified here that the tightening gun 400, signal processing system, etc. are common structures in existing technology. We will not limit the model here, nor will we go into too much detail about their structure. We will only elaborate on the precise positioning and installation position achieved by the proximity switch 602 and the metal base 501.

[0036] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A semi-automatic screw tightening device based on proximity switch positioning, comprising a worktable (100), on which a workpiece (202) is disposed, and a signal processing system corresponding to the worktable (100), characterized in that: The workbench (100) is provided with a number of proximity switches (602) connected to the signal processing system. The workbench (100) is provided with a tightening gun (400) for tightening the screws of the workpiece (202) and a metal seat (501) for contacting the proximity switches (602). The metal seat (501) is provided with a telescopic rod (502) for driving its extension and retraction. The workbench (100) is also provided with a moving mechanism (300) for driving the tightening gun (400) and the metal seat (501) to move together. The position of the metal seat (501) contacting the proximity switch (602) is the same as the position and distance of the tightening gun (400) tightening the screws of the workpiece (202).

2. The semi-automatic screw tightening device based on proximity switch positioning as described in claim 1, characterized in that: The moving mechanism (300) includes a fixed rod (301) set on the workbench (100), and a connecting plate (302) is sleeved on the fixed rod (301). The connecting plate (302) can drive the tightening gun (400) and the metal seat (501) to rotate and move up and down on the fixed rod (301).

3. The semi-automatic screw tightening device based on proximity switch positioning as described in claim 2, characterized in that: A connecting rod (303) is slidably disposed on the connecting plate (302), and the connecting rod (303) can drive the tightening gun (400) and the metal seat (501) to slide together on the connecting plate (302).

4. The semi-automatic screw tightening device based on proximity switch positioning as described in claim 3, characterized in that: The connecting rod (303) has a fixing part (304) at one end, and the fixing part (304) has a round hole for placing the tightening gun (400).

5. A semi-automatic screw tightening device based on proximity switch positioning as described in claim 4, characterized in that: A connecting frame (305) is provided on the other end of the connecting rod (303). The connecting frame (305) has an installation hole. The telescopic rod (502) is provided with a mounting seat installed in the installation hole for connecting the metal seat (501) to the connecting frame (305).

6. The semi-automatic screw tightening device based on proximity switch positioning as described in claim 5, characterized in that: The top of the fixed rod (301) is provided with a pull rope, which is connected to the connecting plate (302). After the tightening gun (400) completes the operation, the pull rope can pull the connecting plate (302) to spring back to its original position.

7. A semi-automatic screw tightening device based on proximity switch positioning as described in claim 1, characterized in that: A bracket (601) is provided on the workbench (100), and a proximity switch (602) is located on the top plate of the bracket (601).

8. A semi-automatic screw tightening device based on proximity switch positioning as described in claim 7, characterized in that: The bottom of the bracket (601) is connected to the worktable (100) by screws. The proximity switch (602) can be adjusted to correspond with the screw position of different workpieces (202) by replacing the bracket (601).

9. A semi-automatic screw tightening device based on proximity switch positioning as described in claim 1, characterized in that: The workbench (100) is provided with a placement platform (201) for placing workpieces (202).

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