A rapid positioning gauge for complex curved surfaces

Abstract

The utility model discloses a kind of for complex surface quick positioning gauge, it includes pedestal, detection platform, adjusting mechanism and positioning mechanism.Pedestal is connected with detection platform by adjusting mechanism, drive motor drives screw rod to drive sliding assembly to move, make positioning mechanism synchronous unfolding or folding, realize quick positioning and space saving.Positioning mechanism is composed of multiple positioning plate and transmission rod, and cooperation gear and flexible measuring belt realize accurate measurement.The present application can be automatically unfolded and folded, occupy small space, convenient to carry, improve use flexibility and operation convenience, suitable for the efficient detection of complex curved surface workpiece.

Description

Technical Field

[0001] This utility model relates to the field of measurement and testing technology, and in particular to a rapid positioning gauge for complex curved surfaces. Background Technology

[0002] In modern industrial manufacturing and processing, the application of complex curved surface parts is becoming increasingly widespread, especially in industries such as aerospace, automotive manufacturing, and precision mold making. The machining accuracy and surface quality of these complex curved surface parts directly affect the performance and reliability of the products. However, achieving rapid and accurate positioning during the machining and inspection of complex curved surface parts has become a key technical challenge. Existing positioning fixtures typically employ traditional clamps or measuring tools, which have many shortcomings when dealing with complex curved surfaces. For example, traditional fixtures are often designed for specific shapes, lacking versatility and struggling to adapt to various curved surface structures. Furthermore, their positioning process usually requires multiple adjustments and calibrations, which are cumbersome and time-consuming, severely impacting production efficiency. In addition, existing fixtures also have limitations in positioning accuracy, especially in high-precision scenarios, where positioning errors can easily lead to inaccurate inspection results, thus affecting product quality. Therefore, developing a fixture capable of rapidly and accurately positioning complex curved surface parts can not only improve inspection efficiency but also significantly enhance product quality and production consistency, possessing significant practical significance and application value. Utility Model Content

[0003] The purpose of this utility model is to provide a rapid positioning fixture for complex curved surfaces, which solves the problems mentioned in the background art.

[0004] This invention is implemented as follows: a rapid positioning fixture for complex curved surfaces includes a base and a detection platform. An adjustment mechanism is provided between the base and the detection platform, and the base and the detection platform are connected through the adjustment mechanism. When the drive motor on the base rotates forward, the adjustment mechanism unfolds, moving the detection platform away from the base and simultaneously moving the sliding components on the detection platform, achieving the purpose of synchronously unfolding the positioning mechanisms on the base and the detection platform. A drive motor is fixedly connected inside the base, and a screw is provided between the drive motor and the base. One end of the screw is rotatably connected to the base, and the other end of the screw is fixedly connected to the output end of the drive motor. A support plate is fixedly connected inside the detection platform, and a guide rod is fixedly connected to the support plate and the detection platform. Sliding components are sleeved on the outside of both the guide rod and the screw. One sliding component is slidably connected to the guide rod, and the other sliding component is threadedly connected to the screw. A positioning mechanism is provided on the top of the sliding component. The positioning mechanism can be folded vertically, and in conjunction with the left and right folding of the base and the detection platform, the entire fixture occupies less space, which is beneficial for handling and improves the flexibility and convenience of use.

[0005] The adjustment mechanism includes a first connecting rod, which is rotatably connected to the base. A second connecting rod is rotatably connected to the top of the first connecting rod, and the second connecting rod is rotatably connected to the sliding assembly. The first and second connecting rods are of the same specifications and are arranged in a cross pattern. There are a total of three sets of the first and second connecting rods, which are rotatably connected end to end. In the set closest to the detection platform, the first connecting rod is rotatably connected to the sliding assembly on the guide rod, while the second connecting rod is directly rotatably connected to the detection platform.

[0006] Both the base and the testing platform have mounting holes inside. There are two mounting holes on each of the base and the testing platform. The mounting holes are used to insert fixing pins to finally fix the whole structure.

[0007] The positioning mechanism includes a first positioning plate, which is rotatably connected to a sliding assembly. A first transmission rod is provided between the first positioning plate and the base. Under the action of the first transmission rod, when the screw drives the sliding assembly to move, the first positioning plate on the sliding assembly will be squeezed or pulled by the first transmission rod, thereby causing the first positioning plate to automatically rotate upward or downward. One end of the first transmission rod is rotatably connected to the base, and the other end of the first transmission rod is rotatably connected to the first positioning plate. A second positioning plate is rotatably connected to one side of the first positioning plate, and a third positioning plate is rotatably connected to the other side of the first positioning plate. A second transmission rod is rotatably connected between the second and third positioning plates. Gears are fixedly connected to the outside of both the second transmission rod and the first positioning plate, and the two gears mesh with each other. A third transmission rod is provided between the second positioning plate and the sliding assembly. One end of the third transmission rod is rotatably connected to the second positioning plate, and the other end is rotatably connected to the sliding assembly. The four positions of the third transmission rod (one end rotating with the second positioning plate, the other end rotating with the sliding assembly, the second positioning plate rotating with the first positioning plate, and the first positioning plate rotating with the sliding assembly) form a parallelogram, ensuring that the third transmission rod and the first positioning plate are always parallel to each other. When the first positioning plate rotates, the third transmission rod pushes and pulls the second positioning plate. With the cooperation of two meshing gears, the second positioning plate drives the second transmission rod to rotate around the first positioning plate until the second transmission rod and the first positioning plate are in the same straight line or parallel to each other.

[0008] Both the first positioning plate and the second transmission rod have internal storage cavities. A rotating shaft is rotatably connected inside each storage cavity. A coil spring is sleeved on the outside of the rotating shaft. Multiple coil springs are arranged on the rotating shaft at equal intervals. The coil springs are fixedly connected to the rotating shaft. A flexible measuring tape is wound around the outside of the coil springs. The flexible measuring tape is fixedly connected to the coil springs. A torsion spring is sleeved on the outside of the rotating shaft and between the storage cavity and the coil springs. One end of the torsion spring is fixedly connected to the rotating shaft, and the other end of the torsion spring is fixedly connected to the storage cavity. The torsion spring is mainly used to drive the rotating shaft to rotate automatically, and the rotating shaft then drives the coil springs to rotate and wind up the flexible measuring tape.

[0009] The storage cavity is detachably connected to a cover plate, and the cover plate has a through groove inside. The through groove is used in conjunction with a flexible measuring belt. The first positioning plate and the second transmission rod are fixed to the cover plate by bolts. The cover plate can seal the storage cavity on the first positioning plate and the second transmission rod to prevent foreign objects from entering the storage cavity. The flexible measuring belt extends directly to the outside through the through groove on the cover plate.

[0010] The base and the detection platform are both fixedly connected to guide rails. The sliding component has a guide groove on the side near the guide rail. The guide groove works in conjunction with the guide rail to limit the sliding component, making the sliding component move more smoothly.

[0011] The detection platform has a sliding groove inside, and a ball bearing is rotatably connected inside the sliding groove. There are two sliding grooves, which are symmetrically distributed. When the drive motor is started, the drive motor will drive the sliding component to move through the screw. The sliding component uses an adjustment mechanism to drive the detection platform to move away from or closer to the base, so as to realize the automatic unfolding and folding of the whole.

[0012] The base is externally fixed with a control button, and the drive motor is electrically connected to the control button. The electrical equipment is powered by an external power source, such as a battery, and the start, stop, forward and reverse rotation of the drive motor are controlled by the control button. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a front view of the adjustment mechanism and sliding component of this utility model;

[0015] Figure 3 This is a structural schematic diagram of the positioning mechanism of this utility model in its unfolded state.

[0016] The attached figures are labeled as follows:

[0017] 1. Base; 2. Detection platform; 3. Adjustment mechanism; 4. Drive motor; 5. Screw; 6. Support plate; 7. Guide rod; 8. Sliding assembly; 9. Positioning mechanism; 10. First connecting rod; 11. Second connecting rod; 12. Mounting hole; 13. First positioning plate; 14. First transmission rod; 15. Second positioning plate; 16. Third positioning plate; 17. Second transmission rod; 18. Gear; 19. Third transmission rod; 20. Storage cavity; 21. Rotating shaft; 22. Coil spring; 23. Flexible measuring belt; 24. Torsion spring; 25. Cover plate; 26. Through groove; 27. Guide rail; 28. Guide groove; 29. ​​Slide groove; 30. Ball bearing; 31. Control button. Detailed Implementation

[0018] This utility model relates to a rapid positioning fixture for complex curved surfaces. Its ingenious structural design and diverse functions enable efficient positioning and flexible operation during actual inspection. The following description, in conjunction with the appendix... Figures 1 to 3 The specific embodiments of this utility model are described in detail with reference to the component numbers marked in the accompanying drawings.

[0019] exist Figure 1 The diagram shows the overall structure of this utility model, including a base 1, a detection platform 2, an adjustment mechanism 3, a positioning mechanism 9, and a drive motor 4. The base 1 and the detection platform 2 are connected via the adjustment mechanism 3. The design of the adjustment mechanism 3 allows the detection platform 2 to move closer to or further away from the base 1 as needed, thereby enabling the overall structure to unfold and fold. The drive motor 4 is fixedly connected inside the base 1. The drive motor 4 is connected to the base 1 via a screw 5. One end of the screw 5 is rotatably connected to the base 1, and the other end is fixedly connected to the output end of the drive motor 4. A support plate 6 is fixedly connected inside the detection platform 2. The support plate 6 is fixedly connected to the detection platform 2 via a guide rod 7. Sliding components 8 are fitted onto the outside of both the guide rod 7 and the screw 5. The sliding components 8 are slidably connected to the guide rod 7 and threadedly connected to the screw 5, respectively. A positioning mechanism 9 is provided on the top of the sliding components 8. When the drive motor 4 rotates in the forward direction, the screw 5 drives the sliding assembly 8 to move. The sliding assembly 8, through the adjustment mechanism 3, pushes the detection platform 2 away from the base 1. At the same time, the positioning mechanism 9 on the sliding assembly 8 also unfolds, thus realizing the synchronous unfolding function of the positioning mechanism 9 on the base 1 and the detection platform 2. This design not only improves detection efficiency but also significantly reduces the space occupied by the inspection tool, making it easier to transport and store.

[0020] Further reference Figure 2This figure is a partially enlarged view of the adjusting mechanism 3 and the sliding assembly 8, showing in detail the cooperation structure and rotational connection method between the first connecting rod 10, the second connecting rod 11, the guide rod 7, the screw 5, and the sliding assembly 8. The adjusting mechanism 3 includes three sets of cross-arranged first connecting rods 10 and second connecting rods 11. In each set, the first connecting rod 10 is rotatably connected to the base 1, and its top is rotatably connected to the second connecting rod 11. In the set closest to the detection platform 2, the first connecting rod 10 is rotatably connected to the sliding assembly 8 on the guide rod 7, while the second connecting rod 11 is directly rotatably connected to the detection platform 2. This end-to-end linkage structure allows the adjusting mechanism 3 to unfold or fold smoothly under the action of the drive motor 4. In addition, two mounting holes 12 are provided inside the base 1 and the detection platform 2 for inserting fixing pins to finally fix the overall structure, ensuring that it will not loosen or shift during use.

[0021] Figure 3 This is a partial cross-sectional view of the positioning mechanism 9 in its unfolded state, focusing on the internal structure and transmission relationship of the first positioning plate 13, the second positioning plate 15, the third positioning plate 16, the flexible measuring belt 23, and their storage cavity 20. The positioning mechanism 9 includes a first positioning plate 13, which is rotatably connected to the sliding assembly 8 and connected to the base 1 via a first transmission rod 14. One end of the first transmission rod 14 is rotatably connected to the base 1, and the other end is rotatably connected to the first positioning plate 13. When the screw 5 drives the sliding assembly 8 to move, the sliding assembly 8 applies a pulling or pushing force to the first positioning plate 13 via the first transmission rod 14, thereby causing the first positioning plate 13 to automatically rotate upwards or downwards. The second positioning plate 15 is rotatably connected to one side of the first positioning plate 13, and the third positioning plate 16 is rotatably connected to the other side. The second positioning plate 15 and the third positioning plate 16 are rotatably connected via a second transmission rod 17. Gears 18 are fixedly connected to the exterior of both the second transmission rod 17 and the first positioning plate 13, and the two gears 18 mesh with each other. Furthermore, a third transmission rod 19 is provided between the second positioning plate 15 and the sliding assembly 8. One end of the third transmission rod 19 is rotatably connected to the second positioning plate 15, and the other end is rotatably connected to the sliding assembly 8. The third transmission rod 19 and the first positioning plate 13 are always kept parallel. When the first positioning plate 13 rotates, the third transmission rod 19 pushes and pulls the second positioning plate 15, and with the cooperation of the two gears 18, the second positioning plate 15 drives the second transmission rod 17 to rotate around the first positioning plate 13 until the second transmission rod 17 and the first positioning plate 13 are in the same straight line or parallel to each other.

[0022] Both the first positioning plate 13 and the second transmission rod 17 have internal storage cavities 20. A rotating shaft 21 is rotatably connected within each storage cavity 20. Multiple equidistantly distributed coil springs 22 are sleeved on the outside of the rotating shaft 21, and the coil springs 22 are fixedly connected to the rotating shaft 21. A flexible measuring tape 23 is wound around the coil springs 22. The flexible measuring tape 23 is fixedly connected to the coil springs 22. A torsion spring 24 is sleeved on the outside of the rotating shaft 21 between the storage cavity 20 and the coil springs 22. One end of the torsion spring 24 is fixedly connected to the rotating shaft 21, and the other end is fixedly connected to the storage cavity 20. When the first positioning plate 13 or the second transmission rod 17 rotates, the torsion spring 24 drives the rotating shaft 21 to rotate automatically, which in turn drives the coil springs 22 to rotate and wind up the flexible measuring tape 23. This design ensures that the flexible measuring tape 23 can automatically retract during use, avoiding interference with operation due to excessive exposed length.

[0023] A cover plate 25 is detachably connected to the interior of the receiving cavity 20. The cover plate 25 has a through groove 26 inside, which works in conjunction with the flexible measuring belt 23. The first positioning plate 13 and the second transmission rod 17 are bolted to the cover plate 25. The cover plate 25 seals the receiving cavity 20, preventing debris from entering and affecting the normal operation of the internal structure. The flexible measuring belt 23 extends to the outside through the through groove 26 on the cover plate 25 for precise measurement of complex curved surfaces.

[0024] To ensure the stability of the sliding component 8 during movement, guide rails 27 are fixedly connected inside both the base 1 and the detection platform 2. A guide groove 28 is provided inside the sliding component 8 on the side near the guide rail 27, and the guide groove 28 works in conjunction with the guide rail 27. This design effectively limits the movement trajectory of the sliding component 8, allowing it to slide smoothly under the drive of the screw 5, avoiding jamming or deviation. In addition, two symmetrically distributed sliding grooves 29 are provided inside the detection platform 2, and ball bearings 30 are rotatably connected in the sliding grooves 29. When the drive motor 4 is started, the screw 5 drives the sliding component 8 to move. The sliding component 8 pushes the detection platform 2 away from or towards the base 1 through the adjustment mechanism 3, thereby realizing the automatic unfolding and folding of the overall structure.

[0025] A control button 31 is fixedly connected to the external part of the base 1, and the drive motor 4 is electrically connected to the control button 31. The electrical equipment is powered by an external power source such as a battery, and the start, stop, forward and reverse rotation of the drive motor 4 are controlled by the control button 31. This design allows operators to easily adjust the status of the fixture to meet the needs of different scenarios.

[0026] In summary, this invention achieves rapid positioning and inspection of complex curved surfaces through the coordinated operation of the base 1, the inspection platform 2, the adjustment mechanism 3, the positioning mechanism 9, and the drive motor 4. In practical applications, such as in the automotive manufacturing industry, this fixture can be used to inspect the dimensional accuracy of complex curved surfaces on a car body. The operator simply presses the control button 31 to start the drive motor 4. The drive motor 4, via the screw 5, moves the sliding component 8. The sliding component 8, through the adjustment mechanism 3, pushes the inspection platform 2 to unfold, while the positioning mechanism 9 unfolds and conforms to the surface to be measured. The flexible measuring belt 23 can automatically extend and retract as needed, ensuring the accuracy of the measurement results. After the inspection is completed, pressing the control button 31 again reverses the drive motor 4, and the fixture automatically folds for easy handling and storage. The entire process is simple to operate and highly efficient, fully demonstrating the technical advantages of this invention.

[0027] 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 and improvements 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 rapid positioning fixture for complex curved surfaces, comprising: The base (1) and the detection platform (2) are characterized in that: an adjustment mechanism (3) is provided between the base (1) and the detection platform (2), the base (1) and the detection platform (2) are connected by the adjustment mechanism (3), a drive motor (4) is fixedly connected inside the base (1), a screw (5) is provided between the drive motor (4) and the base (1), one end of the screw (5) is rotatably connected to the base (1), and the other end of the screw (5) is fixedly connected to the output end of the drive motor (4), a support plate (6) is fixedly connected inside the detection platform (2), a guide rod (7) is fixedly connected between the support plate (6) and the detection platform (2), and a sliding component (8) is sleeved on the outside of the guide rod (7) and the screw (5), one of the sliding components (8) is slidably connected to the guide rod (7), and the other sliding component (8) is threadedly connected to the screw (5), and a positioning mechanism (9) is provided on the top of the sliding component (8).

2. The rapid positioning fixture for complex curved surfaces according to claim 1, characterized in that: The adjustment mechanism (3) includes a first connecting rod (10), which is rotatably connected to the base (1). A second connecting rod (11) is rotatably connected to the top of the first connecting rod (10). The second connecting rod (11) is rotatably connected to the sliding component (8). The first connecting rod (10) and the second connecting rod (11) are arranged in a cross configuration. There are a total of three sets, which are rotatably connected end to end. In the set closest to the detection platform (2), the first connecting rod (10) is rotatably connected to the sliding component (8) on the guide rod (7), and the second connecting rod (11) is rotatably connected to the detection platform (2).

3. A rapid positioning fixture for complex curved surfaces according to claim 1, characterized in that: The base (1) and the detection platform (2) are both provided with mounting holes (12), and each mounting hole (12) has two holes.

4. A rapid positioning fixture for complex curved surfaces according to claim 1, characterized in that: The positioning mechanism (9) includes a first positioning plate (13), which is rotatably connected to the sliding assembly (8). A first transmission rod (14) is provided between the first positioning plate (13) and the base (1). One end of the first transmission rod (14) is rotatably connected to the base (1), and the other end of the first transmission rod (14) is rotatably connected to the first positioning plate (13). A second positioning plate (15) is rotatably connected to one side of the first positioning plate (13), and a third positioning plate (16) is rotatably connected to the other side. A second transmission rod (17) is rotatably connected between the second positioning plate (15) and the third positioning plate (16). Gears (18) are fixedly connected to the outside of both the second transmission rod (17) and the first positioning plate (13). The two gears (18) mesh with each other. A third transmission rod (19) is provided between the second positioning plate (15) and the sliding assembly (8). One end of the third transmission rod (19) is rotatably connected to the second positioning plate (15), and the other end is rotatably connected to the sliding assembly (8).

5. A rapid positioning fixture for complex curved surfaces according to claim 4, characterized in that: The first positioning plate (13) and the second transmission rod (17) are both provided with a storage cavity (20). A rotating shaft (21) is rotatably connected inside the storage cavity (20). A coil spring (22) is sleeved on the outside of the rotating shaft (21). The coil spring (22) is fixedly connected to the rotating shaft (21). A flexible measuring belt (23) is wound around the outside of the coil spring (22). The flexible measuring belt (23) is fixedly connected to the coil spring (22). A torsion spring (24) is sleeved on the outside of the rotating shaft (21) and between the storage cavity (20) and the coil spring (22). One end of the torsion spring (24) is fixedly connected to the rotating shaft (21), and the other end is fixedly connected to the storage cavity (20).

6. A rapid positioning fixture for complex curved surfaces according to claim 5, characterized in that: The storage cavity (20) is detachably connected to a cover plate (25), and the cover plate (25) has a through groove (26) inside, which is used in conjunction with the flexible measuring belt (23).

7. A rapid positioning fixture for complex curved surfaces according to claim 1, characterized in that: The base (1) and the detection platform (2) are both fixedly connected to guide rails (27). The sliding component (8) has a guide groove (28) on the side close to the guide rail (27) inside. The guide groove (28) is used in conjunction with the guide rail (27).

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