Gimbal positioning mechanism

Abstract

The present application belongs to the technical field of automobile production, and particularly relates to a rotatable table positioning mechanism, which comprises a table top, a base frame and a driving device. The table top comprises a table top frame, a sliding plate and walking wheels. The table top frame is used for bearing a rolling edge clamp. The sliding plate is installed on the supporting wheels of the base frame. The outermost side of the table top frame is evenly provided with a plurality of walking wheels. The walking wheels are matched with the guide rails on the base frame. The base frame comprises a main frame, supporting wheels, guide rails and a shield. The supporting wheels are installed on the inner and outer sides of the main frame. The guide rails are installed on the main frame. The shield is installed on the main frame and located on the upper part of the guide rails. The driving device is installed on one side of the main frame and used for driving the table top to rotate around the guide rails in the base frame. The device uses a split driving mode to drive the rotating table, and can realize the high-flexibility production requirement of the collinear production of six vehicle models and more than six vehicle models.

Description

Technical Field

[0001] This invention belongs to the field of automobile manufacturing technology, and specifically relates to a turntable positioning mechanism. Background Technology

[0002] With the development and changes in the automotive industry, car exteriors are becoming increasingly diverse, and models are being updated rapidly. As a result, flexible production methods are gradually replacing the fixed, large-volume production model. Car doors and hoods, as key automotive components, are updated particularly frequently during model changes, making the demand for highly flexible door and hood trim particularly urgent. Currently, many car manufacturers have proposed high-flexibility trimming for six different models on the same production line.

[0003] Robotic hemming islands offer significant advantages for completing door and cover hemming on multiple vehicle models on the same production line using turntables. However, current turntables in robotic hemming islands rely on standard bearings for rotation center positioning, and the turntable is driven by a motor and gear reducer. This power structure is limited by standard bearings and gears, resulting in a relatively small turntable radius of rotation, generally no more than 1 meter, which cannot meet the requirements for six vehicle models on the same production line. Furthermore, the large bearings have long manufacturing cycles and high costs, leading to long project development cycles and high costs. Summary of the Invention

[0004] The purpose of this invention is to provide a turntable positioning mechanism to solve the problems existing in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a turntable positioning mechanism, comprising a tabletop, a base frame, and a driving device. The tabletop includes a tabletop frame, a sliding plate, and wheels. The tabletop frame is used to support a rolling clamp. The sliding plate is mounted on support wheels of the base frame. A plurality of wheels are evenly distributed on the outermost side of the tabletop frame, and the wheels cooperate with guide rails on the base frame. The base frame includes a main frame, support wheels, guide rails, and a protective cover. The support wheels are mounted on the inner and outer sides of the main frame. The guide rails are mounted on the main frame. The protective cover is mounted on the main frame and located above the guide rails. The driving device is mounted on one side of the main frame and is used to drive the tabletop to rotate around the guide rails in the base frame.

[0006] Preferably, the driving device includes a servo motor, a reducer, a drive wheel, a transfer wheel, a dial, linear guide rails, a slider, a fixed base, a shaft, a dial wheel, a guide wheel, a central shaft, an inner guide plate, an outer guide plate, a dial, and a transfer wheel. The servo motor is directly and fixedly connected to the input end of the reducer, and the output shaft of the reducer is directly and fixedly connected to the drive wheel. The drive wheel meshes with the first transfer wheel and the second transfer wheel respectively. The first transfer wheel is fixedly connected to the first dial, and the second transfer wheel is fixedly connected to the second dial. Each dial has four sets of linear guide rails and sliders evenly distributed in the circumferential direction. Each slider is equipped with a dial wheel and a guide wheel. The dial wheel is cylindrical on the outside and meshes with the wheels in the table. A central shaft is fixedly installed in the center of each dial. An outer guide plate is provided on the outside of the dial wheel, and an inner guide plate is provided on the inside of each set of dial wheels.

[0007] Preferably, the wheel has a cylindrical structure.

[0008] Preferably, the guide rail is circular.

[0009] Preferably, a fixed seat is mounted on the slider, a shaft is mounted on the fixed seat, and the dial wheel and guide wheel are mounted on the shaft.

[0010] The beneficial effects of this invention are as follows: This invention uses a circular guide rail and a circumferentially distributed wheel to achieve the center positioning of the turntable, uses a columnar dial wheel and a columnar wheel meshing method to achieve turntable drive, and uses a split drive method to drive the turntable. It can meet the high flexibility production requirements of six or more car models on the same line, reduce manufacturing difficulty and production cycle, effectively shorten the product development cycle, and facilitate the development and improvement of robot hemming solutions. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of the present invention;

[0012] Figure 2 This is a schematic diagram of the countertop structure in this invention;

[0013] Figure 3 This is a three-dimensional view of the basic framework in this invention;

[0014] Figure 4 This is a cross-sectional view of the driving device in this invention;

[0015] Figure 5 This is a top view of the driving device in this invention;

[0016] Figure 6 This is a diagram showing the meshing state of the turntable wheel and the dial wheel in this invention;

[0017] Figure 7 This is a diagram showing the engagement process of the wheel and the derailleur in this invention.

[0018] Numbering on the map:

[0019] 1. Tabletop; 2. Basic frame; 3. Drive unit; 4. Tabletop frame; 5. Slide board; 6. Casters; 7. Main frame; 8. Support wheels; 9. Guide rail; 10. Protective cover; 11. Servo motor; 12. Reducer; 13. Drive wheel; 14. Distributor wheel; 15. Dial; 16. Linear guide rail; 17. Slider; 18. Fixed base; 19. Shaft; 20. Dial wheel; 21. Guide wheel; 22. Central shaft; 23. Inner guide plate; 24. Outer guide plate; 25. Dial; 26. Distributor wheel. Detailed Implementation

[0020] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings and preferred embodiments.

[0021] like Figure 1 As shown, a turntable positioning mechanism includes a table 1, a base frame 2, and a drive device 3.

[0022] like Figure 2 As shown, the tabletop 1 is the rotating working part of the turntable. The tabletop 1 of this patent has three parts: the tabletop frame 4, the sliding plate 5, and the wheels 6. The tabletop frame 4 supports the edge-rolling fixture and is the main body of the tabletop 1; the sliding plate 5 rests on the support wheels 8 of the base frame 2; several wheels 6 are evenly distributed on the outermost side of the tabletop frame 4. The wheels 6 are cylindrical and work in conjunction with the guide rails 9 on the base frame 2 to ensure the center positioning accuracy of the tabletop 1 and the base frame 2 while also enabling relative rotation between the two.

[0023] like Figure 3 As shown, the base frame 2 is the fixed part of the turntable. The base frame 2 mainly includes a main frame 7, support wheels 8, guide rails 9, and a protective cover 10. The support wheels are installed on the inner and outer sides of the main frame, the guide rails are installed on the main frame, and the protective cover is installed on the main frame and located above the guide rails.

[0024] like Figure 4 and Figure 5As shown, the drive unit 3 is the power unit of the turntable. It mainly consists of a servo motor 11, a reducer 12, a drive wheel 13, a first transfer wheel 14, a first dial 15, a linear guide rail 16, a slider 17, a fixed base 18, a shaft 19, a dial wheel 20, a guide wheel 21, a central shaft 22, an inner guide plate 23, an outer guide plate 24, a second dial 25, and a second transfer wheel 26. The servo motor 11 is directly and fixedly connected to the input end of the reducer 12; power is directly transmitted to the reducer 12 from the servo motor shaft. The output shaft of the reducer 12 is directly and fixedly connected to the drive wheel 13; the drive wheel 13 meshes with the first transfer wheel 14 and the second transfer wheel 26 respectively. The first transfer wheel 14 is fixedly connected to the first dial 15, and the second transfer wheel 26 is fixedly connected to the second dial 25; each dial has four sets of linear guide rails 16 and sliders 17 evenly distributed in the circumferential direction. Each slider 17 is equipped with a dial wheel 20 and a guide wheel 21. The dial wheel 20 is cylindrical on the outside and meshes with the wheels 6 in the platform 1; a central shaft 22 is fixedly installed in the center of each dial; an outer guide plate 24 is provided on the outside of the dial wheel 20; an inner guide plate 23 is provided on the inside of each set of dial wheels. The rotation of the dial drives the wheels to move, thereby causing the platform 1 to rotate around the guide rails 9 in the base frame 2.

[0025] First, the servo motor 11 rotates, and the power is transmitted from the servo motor 11 to the reducer 12. Then, the reducer 2 transmits the power to the first transfer wheel 14 and the second transfer wheel 26 through the drive wheel 13. Next, the transfer wheel drives the dial to rotate, thereby driving the dial wheel 20 to rotate. Due to the restriction of the inner guide plate 23 and the outer guide plate 24, the dial wheel 20 runs along the preset track. Figure 6 As shown, a dial 20 and a wheel 6 are engaged, so power is transmitted from the dial 20 to the wheel 6. The movement of the wheel 6 drives the table 1 to rotate around the guide rail 9, thereby realizing the rotation of the turntable.

[0026] Figure 7 The diagram shows the turntable surface 1, which is composed of... Figure 6 The process of the turntable rotating counterclockwise and the meshing change of the dial wheel 20 and the wheel 6. Figure 6 At this time, one dial 20 is between two wheels 6 and they are engaged with each other. As the dial rotates clockwise, the table 1 rotates counterclockwise. One dial 20 driven by the second dial 25 rotates to the middle of the two wheels 6 and engages with them. At this time, the dial 20 driven by the first dial 15, which is in the engagement state, rotates to the upper corner of the inner guide plate 23. At this time, there is one dial 20 on each of the two dials engaged with the wheel 6. The dial continues to rotate clockwise. The dial 20 driven by the first dial 15 gradually disengages from the engagement state. At this time, only one dial 20 on the turntable is engaged with the wheel 6. When this dial 20 moves from the upper left corner of the inner guide plate 23 to the upper right corner, the other dial 20 driven by the first dial 15 enters the engagement state.

[0027] The engagement state of the dial 20 and the wheel 6 is cyclical, driving the table 1 to rotate.

[0028] It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this invention, and these improvements and modifications should also be considered within the scope of protection of this invention.

Claims

1. A turntable positioning mechanism, characterized in that... The device includes a tabletop, a base frame, and a drive unit. The tabletop includes a tabletop frame, a sliding plate, and wheels. The tabletop frame supports the hemming fixture. The sliding plate is mounted on support wheels of the base frame. Several wheels are evenly distributed on the outermost side of the tabletop frame, and the wheels cooperate with guide rails on the base frame. The base frame includes a main frame, support wheels, guide rails, and a protective cover. The support wheels are mounted on the inner and outer sides of the main frame. The guide rails are mounted on the main frame. The protective cover is mounted on the main frame and located above the guide rails. The drive unit is mounted on one side of the main frame and is used to drive the tabletop to rotate around the guide rails in the base frame. The driving device includes a servo motor, a reducer, a drive wheel, a transfer wheel, a dial, linear guides, a slider, a fixed base, a shaft, a dial wheel, a guide wheel, a central shaft, an inner guide plate, an outer guide plate, a dial, and a transfer wheel. The servo motor is directly and fixedly connected to the input end of the reducer, and the output shaft of the reducer is directly and fixedly connected to the drive wheel. The drive wheel meshes with the first transfer wheel and the second transfer wheel respectively. The first transfer wheel is fixedly connected to the first dial, and the second transfer wheel is fixedly connected to the second dial. Each dial has four sets of linear guides and sliders evenly distributed in the circumferential direction. Each slider is equipped with a dial wheel and a guide wheel. The dial wheel is cylindrical and meshes with the wheels in the table. A central shaft is fixedly installed in the center of each dial. An outer guide plate is provided on the outside of the dial wheel, and an inner guide plate is provided on the inside of each set of dial wheels.

2. The rotatable positioning mechanism according to claim 1, characterized in that: The wheels are cylindrical in shape.

3. The rotatable positioning mechanism according to claim 1, characterized in that: The guide rail is circular.

4. The rotatable positioning mechanism according to claim 1, characterized in that: The slider is equipped with a fixed seat, the fixed seat is equipped with a shaft, and the dial wheel and guide wheel are mounted on the shaft.

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