Multi-vehicle visual tightening device

Abstract

The utility model relates to the field of automobile processing, in particular to a multi-vehicle visual tightening device which comprises a mounting base, a fixed tightening gun, a movable tightening gun, a fixed sliding table air cylinder and a movable sliding table air cylinder, the fixed tightening gun is connected with the fixed sliding table air cylinder, the fixed sliding table air cylinder is fixed on the mounting base, and the movable tightening gun is connected with the movable sliding table air cylinder. The movable sliding table air cylinder is installed on the installation base in a sliding mode, an electric cylinder used for driving the movable sliding table air cylinder to move is arranged on the installation base, air inlets and air outlets of the fixed sliding table air cylinder and the movable sliding table air cylinder are communicated with air pipes, precise pressure regulating valves are installed on the air pipes, and visual measuring pieces are arranged below the front sides of the fixed tightening gun and the movable tightening gun. The vision measuring piece is used for measuring the distance between to-be-machined positions on the two sides of the workpiece. The utility model can be suitable for various vehicle types, and has the advantages of wide application range and high universality.

Description

Technical Field

[0001] The utility model relates to the field of automobile processing, in particular to a multi-car visual tightening device. Background Art

[0002] During the tailgate assembly process, a robot drives a tightening gun through the rear door opening into the car body. The tightening gun is responsible for installing the nut between the tailgate and the car body, completing the tailgate installation. To ensure that the tightening gun always presses against the workpiece and the nut is tightened smoothly, a preload is applied to the tightening gun to keep it in contact with the workpiece.

[0003] Currently, the tightening guns with built-in pre-tightening mechanisms on the market are bulky and inconvenient to insert into the tailgate for installation. Therefore, the inventors propose using a tightening gun without a pre-tightening mechanism and installing an additional pre-tightening mechanism on the base to provide the necessary pre-tightening force, thereby reducing the size of the tightening gun and making it easier to insert into the tailgate for installation.

[0004] The prior art discloses an automatic tightening tool (Announcement No.: CN216859547U; Application Date: 2022-03-28), in which a sliding sleeve is vertically arranged on the upper end surface of the mounting seat, and a tightening gun is inserted into the sliding sleeve through a sliding guide column to realize a vertical lifting connection. A spring is arranged between the sliding sleeve and the sliding guide column, so that the tightening gun can achieve a certain up and down sliding relative to the mounting seat. In the process of tightening the bolt with the tightening gun, the tightening gun can move upward as the bolt is screwed upward under the action of the spring, and always keep the gun head of the tightening gun in close fit with the bolt head. Through the analysis of the prior art, although the tightening gun does not have a pre-tightening mechanism, the following problems still exist:

[0005] 1. The existing technology uses a sliding sleeve, a spring and a sliding guide column to provide pre-tightening force for the tightening gun. The size of the pre-tightening force cannot be accurately adjusted, and it is difficult to meet the requirements of door assembly of different models. The inaccurate pre-tightening force will lead to unstable tightening torque, affecting the assembly quality.

[0006] 2. Existing technologies use a single tightening gun, which prolongs production cycles, impacts overall production efficiency, and fails to meet the high-efficiency requirements of production lines. Existing technologies use robots to drive two fixed tightening guns to tighten workpieces. While this method improves efficiency compared to single-gun tightening, it can only tighten specific models, lacks flexibility, and cannot meet the assembly requirements of multiple models, limiting the versatility and adaptability of the equipment. Utility Model Content

[0007] The utility model aims to provide a multi-car visual tightening device to solve the problem of low production efficiency in the prior art of tightening with a single gun.

[0008] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0009] A multi-vehicle visual tightening device includes a mounting base, a fixed tightening gun, a movable tightening gun, a fixed slide cylinder and a movable slide cylinder. The fixed tightening gun is connected to the fixed slide cylinder, the fixed slide cylinder is fixed on the mounting base, the movable tightening gun is connected to the movable slide cylinder, the movable slide cylinder is slidably mounted on the mounting base, the mounting base is provided with an electric cylinder for driving the movable slide cylinder to move, the air inlet and outlet of the fixed slide cylinder and the movable slide cylinder are both connected to an air pipe, a precision pressure regulating valve is installed on the air pipe, and a visual measuring part is provided on the lower front side of the fixed tightening gun and the movable tightening gun, the visual measuring part is used to measure the distance between the positions to be processed on both sides of the workpiece.

[0010] Preferably, as an improvement, a slide is slidably mounted on the mounting seat, the slide is fixedly connected to the electric cylinder, and the movable slide cylinder is fixed on the slide.

[0011] Preferably, as an improvement, a scale is fixed on the slide, and a pointer for reading on the scale is fixed on the mounting seat.

[0012] Preferably, as an improvement, both the fixed slide cylinder and the movable slide cylinder are slidably connected to a guide rail.

[0013] Preferably, as an improvement, a mounting bracket is installed on the mounting seat, and the mounting bracket is used to fix the visual measuring part. The mounting bracket includes an X-axis hole axis, a Y-axis hole axis and a Z-axis hole axis. The Y-axis hole axis is bolted to the mounting seat, and the Z-axis hole axis is detachably connected to the Y-axis hole axis through a shaft sleeve clamp. The X-axis hole axis is detachably connected to the Z-axis hole axis through a shaft sleeve clamp, and the X-axis hole axis is fixedly connected to the visual measuring part.

[0014] Preferably, as an improvement, there are two movable tightening guns and two fixed tightening guns.

[0015] The principles and beneficial effects of this program are:

[0016] 1. This solution is adaptable to multiple vehicle models and has the effect of efficient processing: This solution is equipped with a movable tightening gun and a fixed tightening gun. Two visual measuring parts are used to measure the distance between the positions to be processed on both sides of the workpiece, and the data is transmitted to the PLC. The PLC controls the electric cylinder to drive the movable tightening gun to slide according to the measured distance, thereby adjusting the distance between the movable tightening gun and the fixed tightening gun, so that the movable tightening gun and the fixed tightening gun correspond to the positions to be processed on both sides respectively. The use of the movable tightening gun and the fixed tightening gun to process the positions to be processed on both sides simultaneously not only improves the processing efficiency compared to the existing technology that uses a single gun tightening method, but also this solution can be applied to multiple vehicle models, with a wide range of applicability and high versatility.

[0017] This solution features two fixed and two movable tightening guns, allowing all four to operate simultaneously. Alternatively, one set of movable and fixed tightening guns can operate while the other serves as a backup. This design expands the scope of application, meeting the machining requirements of more vehicle models and enhancing the equipment's flexibility and adaptability.

[0018] 2. The movable tightening gun and the fixed tightening gun are supported from the bottom by two sliding cylinders. During processing, the robot drives this solution to move up as a whole and close to the workpiece. When the movable tightening gun and the fixed tightening gun are against the workpiece and continue to move up, the workpiece presses down on this solution, so that the two sliding cylinders are pressed down to form a pre-tightening force. During the tightening process, the two tightening guns can move up as the nut is screwed upward under the action of the sliding cylinder, always keeping the gun head of the tightening gun in close fit with the workpiece, ensuring that the nut is tightened smoothly. This solution uses a sliding cylinder to provide pre-tightening force for the tightening gun. Compared with the existing technology, this solution can precisely adjust the air pressure of the sliding cylinder through a precision pressure regulating valve, thereby precisely adjusting the pre-tightening force of the tightening gun. This design can be applied to the assembly needs of a variety of vehicle models, and has high adjustment accuracy, ensuring the tightening quality and accuracy.

[0019] 3. This solution is equipped with a ruler and pointer, which can visually observe the movement distance of the sliding tightening gun, making it easier for operators to observe and record. This design improves the visualization of the operation and enables operators to more accurately grasp the position information of the tightening gun.

[0020] 4. This solution is equipped with a guide rail to guide the movable tightening gun and the fixed tightening gun, improve their vertical floating stability, ensure the stability and accuracy of the tightening gun during operation, and enhance the reliability and durability of the equipment.

[0021] 5. The visual measuring component is mounted on a mounting bracket consisting of an X-axis, a Y-axis, and a Z-axis. This allows for adjustment of the component's position in three-dimensional space, thus accommodating measurements at various locations. Specifically, by rotating the shaft sleeve clamp connecting the X-axis to the Z-axis, the X-axis can be rotated about the Z-axis, thereby rotating the visual measuring component in the XY plane and adjusting its position in the XY plane. Similarly, by rotating the visual measuring component, the X-axis, and the Z-axis as a whole about the Y-axis, the position of the visual measuring component in the XZ plane can be adjusted. Similarly, by rotating the X-axis, the position of the visual measuring component in the YZ plane can be adjusted. This multi-axis adjustment mechanism enables the visual measuring component to flexibly adapt to the processing needs of various vehicle models, improving the adaptability and flexibility of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of an embodiment of the present utility model.

[0023] Figure 2 It is a partial structural diagram of an embodiment of the present utility model.

[0024] Figure 3 Schematic diagram of the structure of the mounting frame in the embodiment of the present utility model. DETAILED DESCRIPTION

[0025] The following is further described in detail through specific implementation methods:

[0026] The figure marks in the drawings of the specification include: mounting base 1, fixed tightening gun 2, movable tightening gun 3, gun head 31, fixed slide cylinder 4, movable slide cylinder 5, mounting plate 6, slider 61, guide rail 62, slide 7, electric cylinder 71, ruler 72, pointer 73, mounting frame 8, X-axis hole shaft 81, Y-axis hole shaft 82, Z-axis hole shaft 83, shaft sleeve clamp 84, and visual measuring part 9.

[0027] Example:

[0028] Combine Figure 1 and Figure 2 As shown, a multi-car visual tightening device includes a mounting base 1, a fixed tightening gun 2, a movable tightening gun 3, a fixed slide cylinder 4 and a movable slide cylinder 5.

[0029] A slide 7 is slidably mounted on the mounting base 1. An electric cylinder 71 is connected to the slide 7. The movable slide cylinder 5 is bolted to the slide 7. A scale 72 is screwed to the slide 7. A pointer 73, used to read the scale 72, is welded to the mounting base 1. A mounting plate 6 is bolted to the movable slide cylinder 5. A slider 61 is bolted to the mounting plate 6. A guide rail 62 is bolted to the slide 7. The slider 61 is slidably connected to the guide rail 62. In this embodiment, there are two movable tightening guns 3, each bolted to the mounting plate 6 of the movable slide cylinder 5. The gun heads 31 of the movable tightening guns 3 face upward.

[0030] The fixed slide cylinder 4 is bolted to the mounting base 1. A guide rail 62 is also bolted to the mounting base 1 on the rear side of the fixed slide cylinder 4. A mounting plate 6 is also bolted to the fixed slide cylinder 4. A slider 61 is also bolted to the mounting plate 6. The slider 61 is slidably connected to the guide rail 62. In this embodiment, there are also two fixed tightening guns 2, each bolted to the mounting plate 6. The gun heads 31 of the fixed tightening guns 2 are also facing upward. The air inlets and outlets of the fixed slide cylinder 4 and the movable slide cylinder 5 are both connected to air pipes (not shown), which are equipped with precision pressure regulating valves.

[0031] Combine Figure 3As shown, mounting brackets 8 are bolted on both sides of the mounting base 1, and the mounting brackets 8 include an X-axis hole shaft 81, a Y-axis hole shaft 82 and a Z-axis hole shaft 83. The Y-axis hole shaft 82 is bolted to the mounting base 1, and the Z-axis hole shaft 83 is detachably connected to the Y-axis hole shaft 82 through a shaft sleeve clamp 84. The X-axis hole shaft 81 is detachably connected to the Z-axis hole shaft 83 through a shaft sleeve clamp 84. The X-axis hole shaft 81 is fixedly connected to a visual measuring component 9 through bolts. The two visual measuring components 9 are respectively arranged below the front side of the fixed tightening gun 2 and the movable tightening gun 3. The visual measuring component 9 is used to measure the distance between the positions to be processed on both sides of the workpiece. In this embodiment, the visual measuring component 9 is a 3D camera.

[0032] The working principle of a multi-car visual tightening device is:

[0033] This solution is used for body-in-white (BIW) assembly, using the example of a car's tailgate. The tailgate is moved by a robot to its corresponding position at the rear of the vehicle. The robot inserts the solution through the rear door opening and moves it underneath the tailgate. Two visual measurement units 9 measure the spacing between studs at the locations to be processed on either side of the tailgate and transmit the results to the PLC. Based on the results, the PLC controls the electric cylinder 71 to drive the movable slide cylinder 5 and the movable tightening gun 3 to slide horizontally as a whole. This adjusts the spacing between the movable tightening gun 3 and the fixed tightening gun 2, ensuring that the movable tightening gun 3 and the fixed tightening gun 2 correspond to the locations to be processed on either side of the tailgate.

[0034] The air pressure of the fixed slide cylinder 4 and the movable slide cylinder 5 is adjusted by a precision pressure regulating valve, and the air pressure requirements of the fixed slide cylinder 4 and the movable slide cylinder 5 are consistent. After the fixed tightening gun 2 and the movable tightening gun 3 grab the nut, the robot drives the entire solution to move up close to the back door. When the nuts on the gun heads 31 of the movable tightening gun 3 and the fixed tightening gun 2 are against the studs at the position to be processed on the back door, they continue to move up, causing the back door to press down on the solution, thereby forming a pre-tightening force on the movable slide cylinder 5 and the fixed slide cylinder 4. During the tightening process, the fixed tightening gun 2 and the movable tightening gun 3 respectively move up as the nut is screwed upward under the action of the fixed slide cylinder 4 and the movable slide cylinder 5, always keeping the gun head 31 of the tightening gun in close contact with the workpiece to ensure that the nut is tightened smoothly.

[0035] The above description is merely an embodiment of the present invention, and the commonly known specific technical solutions and / or features of the solution are not described in detail here. It should be noted that for those skilled in the art, without departing from the technical solution of the present invention, several variations and improvements can be made, which should also be considered as the scope of protection of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection claimed in this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A multi-car visual tightening device, characterized by: It includes a mounting base, a fixed tightening gun, a movable tightening gun, a fixed slide cylinder and a movable slide cylinder. The fixed tightening gun is connected to the fixed slide cylinder, the fixed slide cylinder is fixed on the mounting base, the movable tightening gun is connected to the movable slide cylinder, the movable slide cylinder is slidably installed on the mounting base, the mounting base is provided with an electric cylinder for driving the movable slide cylinder to move, the air inlet and outlet of the fixed slide cylinder and the movable slide cylinder are connected with an air pipe, a precision pressure regulating valve is installed on the air pipe, and a visual measuring part is provided at the lower front side of the fixed tightening gun and the movable tightening gun. The visual measuring part is used to measure the distance between the positions to be processed on both sides of the workpiece.

2. The multi-car visual tightening device according to claim 1, characterized in that: A slide is slidably mounted on the mounting seat. The slide is fixedly connected to the electric cylinder, and the movable slide cylinder is fixed on the slide.

3. The multi-car visual tightening device according to claim 2, characterized in that: A scale is fixed on the slide, and a pointer for reading on the scale is fixed on the mounting base.

4. The multi-car visual tightening device according to claim 3, characterized in that: The fixed slide cylinder and the movable slide cylinder are both slidably connected with guide rails.

5. The multi-car visual tightening device according to claim 4, characterized in that: A mounting bracket is installed on the mounting seat, and the mounting bracket is used to fix the visual measuring part. The mounting bracket includes an X-axis hole axis, a Y-axis hole axis and a Z-axis hole axis. The Y-axis hole axis is bolted to the mounting seat, and the Z-axis hole axis is detachably connected to the Y-axis hole axis through a shaft sleeve clamp. The X-axis hole axis is detachably connected to the Z-axis hole axis through a shaft sleeve clamp, and the X-axis hole axis is fixedly connected to the visual measuring part.

6. The multi-car visual tightening device according to claim 5, characterized in that: There are two movable tightening guns and two fixed tightening guns.

Images