A novel two-degree-of-freedom motion test platform

Abstract

The utility model discloses a novel two degrees of freedom motion test platform belongs to motion simulation and test equipment technical field, including chain drive seat displacement platform and four axle synchronous trapezoidal screw rod elevating system, and chain drive seat displacement platform is fixedly connected through bolt and four axle synchronous trapezoidal screw rod elevating system, and chain drive seat displacement platform includes seat, sliding table, pivot, bearing seat, three phase asynchronous motor, aluminium alloy, driving wheel, guide rail, tensioning wheel, chain fixed bolster, frame, slider and support frame. The utility model discloses a four axle synchronous trapezoidal screw rod elevating structure realizes vertical lift and jolt simulation, utilizes screw rod self -locking to ensure power -off safety, realizes horizontal acceleration, deceleration and to and fro motion through chain drive seat displacement platform, and the seat gliding is driven by motor drive chain, and two sets of mechanism coordinate work, and the seat can simulate the multidimensional dynamic in the vehicle driving, realizes the integration function of driving experience and product test.

Description

Technical Field

[0001] This utility model relates to the field of motion simulation and testing equipment technology, and in particular to a novel two-degree-of-freedom motion testing platform. Background Technology

[0002] Currently, driving simulation and testing platforms are mostly used in automotive industry research and development or large-scale entertainment facilities. Their complex structure, large size, and high manufacturing cost make them difficult to popularize in small and medium-sized laboratories or experience venues. Existing testing platforms often have limited functions and cannot simultaneously simulate the multi-degree-of-freedom complex motions of vehicles, such as acceleration and deceleration in the horizontal direction and bumps and rises and falls in the vertical direction. This results in incomplete test data and insufficient realism in the experience.

[0003] In addition, traditional platforms still have room for improvement in terms of safety, structural stability and operational reliability. For example, some platforms lack a power-off self-locking mechanism, which poses a safety hazard; the transmission system is prone to loosening or wear during frequent reciprocating motion, affecting test accuracy and equipment lifespan. Therefore, there is an urgent need to develop a compact, stable, functionally integrated, safe and reliable miniaturized multi-degree-of-freedom motion test platform.

[0004] Therefore, a novel two-degree-of-freedom motion testing platform is proposed. Utility Model Content

[0005] The purpose of this invention is to solve the problems of existing driving test platforms, such as large size, high cost, limited functionality, and insufficient safety, and to propose a new two-degree-of-freedom motion test platform.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A novel two-degree-of-freedom motion testing platform includes a chain-driven seat displacement platform and a four-axis synchronous trapezoidal screw lifting mechanism. The chain-driven seat displacement platform is fixedly connected to the four-axis synchronous trapezoidal screw lifting mechanism by bolts. The chain-driven seat displacement platform includes a seat, a slide, a rotating shaft, a bearing housing, a three-phase asynchronous motor, aluminum profiles, a drive wheel, a guide rail, a tension wheel, a chain fixing bracket, a frame, a slider, and a support frame. The frame and support frame are both constructed from multiple welded aluminum profiles. The frame is fixedly installed below the slide. The chain fixing bracket is fixedly installed below the frame. The seat is fixedly installed on top of the slide. The slider is fixedly installed below the frame and engaged with the guide rail. The guide rail is fixedly installed on top of the support frame. The three-phase asynchronous motor is fixedly installed inside the support frame. The bearing housing is fixedly installed to the side of the guide rail with bolts. The tension wheel is fixedly installed in the middle of the rotating shaft. The rotating shaft is fixedly installed at the end of the bearing housing away from the guide rail. The tension wheel closest to the three-phase asynchronous motor is connected to the output end of the three-phase asynchronous motor via a chain drive. The chain drive connects to the periphery of multiple tension wheels, and one end of the chain is fixedly connected to the bottom of the chain fixing bracket. The four-axis synchronous trapezoidal screw lifting mechanism includes a servo motor, a transfer case, an upper platform for four-axis screw lifting, a lower platform for four-axis screw lifting, a transmission rod, a coupling, a screw nut, a trapezoidal screw lifting mechanism, and a T-shaped screw. The servo motor is fixedly installed on one side of the lower platform for four-axis screw lifting. The transfer case is fixed to the middle of the lower platform for four-axis screw lifting by bolts. The output end of the servo motor is fixedly connected to the input end of the transfer case by a coupling. Both ends of the transmission rod are fixedly connected to the output end of the transfer case and the trapezoidal screw lifting mechanism by couplings, respectively. The T-shaped screw passes through the upper platform for four-axis screw lifting and is fixedly connected to the trapezoidal screw lifting mechanism. A screw nut is sleeved on the lower end of the T-shaped screw. The upper platform for four-axis screw lifting is fixedly connected to the bottom of the support frame.

[0007] Preferably, the guide rails are configured in two sets, with two sliders on each set of guide rails. The sliders are wedge-shaped and engage with the guide rails. The contact surface between the sliders and the slide table is designed with an anti-slip structure.

[0008] Preferably, the trapezoidal lead screw lifting mechanism is configured as four sets, which are respectively fixedly installed at the four corners of the four-axis lead screw lifting lower platform by bolts. The lead screw nut is threaded with the T-shaped lead screw, and multiple lead screw nuts are fixedly welded to the four corners of the four-axis lead screw lifting upper platform.

[0009] Preferably, the seat is provided with a seat belt fixing bracket for installing a three-point seat belt, and the tension wheel includes a wheel body and an adjusting screw. The contact pressure between the tension wheel and the chain can be changed by rotating the adjusting screw.

[0010] Preferably, a rolling bearing is provided between the rotating shaft and the bearing housing, the inner ring size of the rolling bearing is adapted to the rotating shaft, the outer ring size of the rolling bearing is adapted to the bearing housing, and the transmission rod adopts a hollow steel tube structure.

[0011] Preferably, the aluminum profiles are fixedly connected by angle brackets and bolts, and the bottom of the support frame is positioned with the top of the four-axis lead screw lifting platform by positioning pins and then fixed with bolts.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model adopts a four-axis synchronous trapezoidal screw lifting mechanism, combined with a chain-driven seat displacement platform, to simulate various working conditions of vehicles such as bumps, lifting, acceleration, and deceleration. This structure not only provides stable support and strong load-bearing capacity, but also has a power-off self-locking function, which effectively improves the safety and reliability of the platform and is suitable for real driving experience and product performance testing.

[0013] 2. This utility model integrates a real car seat and seat belt fixing frame, combined with a guide rail slider wedge-shaped design and chain tension adjustment mechanism, to enhance the platform's anti-tipping ability and transmission stability, making the riding experience closer to the real vehicle environment. At the same time, it facilitates seat position adjustment and maintenance, achieving the effect of multi-purpose and efficient testing. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of a novel two-degree-of-freedom motion testing platform proposed in this utility model; Figure 2 This is a top view of the structure of a novel two-degree-of-freedom motion testing platform proposed in this utility model; Figure 3 This is a schematic front view of the structure of a novel two-degree-of-freedom motion testing platform proposed in this utility model; Figure 4 This is a schematic diagram of a four-axis synchronous trapezoidal screw lifting mechanism for a novel two-degree-of-freedom motion testing platform proposed in this utility model. Figure 5 This is a schematic diagram of the transfer case structure of a novel two-degree-of-freedom motion testing platform proposed in this utility model; Figure 6 This is a schematic diagram of the chain-driven seat displacement platform structure of a novel two-degree-of-freedom motion testing platform proposed in this utility model. Figure 7 This is a schematic diagram of the frame structure of a novel two-degree-of-freedom motion testing platform proposed in this utility model.

[0015] In the diagram: 1. Seat; 2. Slide table; 3. Shaft; 4. Bearing seat; 5. Three-phase asynchronous motor; 6. Chain; 7. Aluminum profile; 8. Servo motor; 9. Four-axis lead screw lifting upper platform; 10. Four-axis lead screw lifting lower platform; 11. Drive wheel; 12. Transmission rod; 13. Guide rail; 14. Coupling; 15. Tensioner wheel; 16. Chain fixing bracket; 17. Frame; 18. Slider; 19. Lead screw nut; 20. Trapezoidal lead screw lifting mechanism; 21. T-shaped lead screw; 22. Support frame; 23. Transfer case. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0017] Reference Figures 1-6 A novel two-degree-of-freedom motion testing platform includes a chain-driven seat displacement platform and a four-axis synchronous trapezoidal screw lifting mechanism. The chain-driven seat displacement platform is fixedly connected to the four-axis synchronous trapezoidal screw lifting mechanism by bolts. The chain-driven seat displacement platform includes a seat 1, a slide 2, a rotating shaft 3, a bearing housing 4, a three-phase asynchronous motor 5, aluminum profiles 7, a drive wheel 11, a guide rail 13, a tension wheel 15, a chain fixing bracket 16, a frame 17, a slider 18, and a support frame 22. Both the frame 17 and the support frame 22 are welded from multiple aluminum profiles 7. The frame 17 is fixedly installed below the slide 2; the chain fixing bracket 16 is fixedly installed below the frame 17; the seat 1 is fixedly installed on the top of the slide 2; and the slider 18 is fixedly installed below the frame 17 and engaged with the guide rail. On rail 13, guide rail 13 is fixedly installed on the top of support frame 22, three-phase asynchronous motor 5 is fixedly installed inside support frame 22, bearing seat 4 is fixedly installed on the side of guide rail 13 by bolts, tension wheel 15 is fixedly installed in the middle of rotating shaft 3, rotating shaft 3 is fixedly installed at the end of bearing seat 4 away from guide rail 13, tension wheel 15 close to three-phase asynchronous motor 5 is connected to the output end of three-phase asynchronous motor 5 through chain 6, chain 6 is connected to the periphery of multiple tension wheels 15, and one end of chain 6 is fixedly connected to the bottom of chain fixing bracket 16; The four-axis synchronous trapezoidal screw lifting mechanism includes a servo motor 8, a transfer case 23, an upper platform 9 for four-axis screw lifting, a lower platform 10 for four-axis screw lifting, a transmission rod 12, a coupling 14, a screw nut 19, a trapezoidal screw lifting mechanism 20, and a T-shaped screw 21. The servo motor 8 is fixedly installed on one side of the lower platform 10. The transfer case 23 is fixed to the middle of the lower platform 10 by bolts. The output end of the servo motor 8 is fixedly connected to the input end of the transfer case 23 through the coupling 14. The two ends of the transmission rod 12 are fixedly connected to the output end of the transfer case 23 and the trapezoidal screw lifting mechanism 20 through the coupling 14, respectively. The T-shaped screw 21 passes through the upper platform 9 for four-axis screw lifting and is fixedly connected to the trapezoidal screw lifting mechanism 20. The lower end of the T-shaped screw 21 is fitted with a screw nut 19. The upper platform 9 for four-axis screw lifting is fixedly connected to the bottom of the support frame 22.

[0018] Through the above technical solution, this utility model integrates a four-axis synchronous trapezoidal screw lifting mechanism and a chain-driven seat displacement platform to construct a two-degree-of-freedom motion drive system that works in concert, thereby achieving accurate simulation of various typical working conditions such as bumps, lifting, acceleration, and deceleration during vehicle operation. The four-axis synchronous trapezoidal screw lifting mechanism consists of a servo motor 8, a transfer box 23, four sets of trapezoidal screw lifting mechanisms 20, transmission rods 12, couplings 14, T-shaped screws 21, and screw nuts 19. The four sets of trapezoidal screw lifting mechanisms 20 are fixed at the four corners of the four-axis screw lifting platform 10, which can stably bear the platform load. The power output by the servo motor 8 is transmitted to the transfer box 23 through the coupling 14, and then the transfer box 23 synchronously distributes the power to each transmission rod 12, driving the trapezoidal screw lifting mechanism 20 to drive the T-shaped screw 21 to move, thereby realizing the simulation of the platform's lifting and bumping conditions. The T-shaped screw 21 has a power failure self-locking function, which can ensure that the platform maintains its current position after power failure, improving operational safety. The chain-driven seat displacement platform consists of a slide 2, a seat 1, a guide rail 13, a bearing seat 4, a three-phase asynchronous motor 5, a chain 6, a tensioner 15, a drive wheel 11, and an aluminum profile 7 forming a frame 17 and a support frame 22. The three-phase asynchronous motor 5 drives the drive wheel 11 and multiple tensioners 15 through the chain 6. One end of the chain 6 is connected to a chain fixing bracket 16 fixed below the frame 17, which can drive the slide 2 to move horizontally along the guide rail 13, thereby simulating vehicle acceleration, rapid acceleration, and rapid deceleration, meeting the testing requirements for the support performance of the seat 1 and the seat belt protection effect. At the same time, it achieves the dual goals of driving experience simulation and product optimization design, realizing the multi-functional value of one machine.

[0019] Specifically, the guide rails 13 are configured in two sets, with two sliders 18 on each set of guide rails 13. The sliders 18 and guide rails 13 are wedge-shaped. The contact surface between the sliders 18 and the slide table 2 adopts an anti-slip structure design. The trapezoidal screw lifting mechanism 20 is configured in four sets, which are fixedly installed at the four corners of the four-axis screw lifting lower platform 10 by bolts. The screw nut 19 is threadedly engaged with the T-shaped screw 21. Multiple screw nuts 19 are fixedly welded to the four corners of the four-axis screw lifting upper platform 9.

[0020] Through the above technical solutions, this utility model significantly enhances the platform's practicality, stability, and realism through multiple structural design optimizations, specifically in the following aspects: Regarding riding experience and safety, the chain-driven seat displacement platform is equipped with a real car seat 1 and a specially designed seatbelt fixing bracket for installing three-point seatbelts, completely replicating the riding scenario of a real vehicle. This provides passengers with a driving experience close to actual driving, while also allowing for direct testing of the seat 1's support effect on the human body and the seatbelt's protective performance. Regarding structural stability and risk prevention, the guide rails 13 are arranged in two symmetrical sets, each set of guide rails 13 equipped with two sliders 18. The sliders 18 and guide rails 13 adopt a wedge-shaped fit design, which not only ensures a moderate contact area but also effectively improves the platform's stability. 2. The stability during horizontal movement serves to prevent tipping and avoid deviation or swaying during movement. Regarding transmission maintenance and adaptability, the chain drive system is equipped with a tension wheel 15 containing a wheel and adjusting screw. Operators can adjust the tension of the chain 6 at any time by rotating the adjusting screw to change the contact pressure between the tension wheel 15 and the chain 6, ensuring high torque capacity and stability during reciprocating motion, thus solving the problem of chain 6 loosening and affecting transmission efficiency after long-term use. For ease of installation and adjustment, the slide 2 and seat 1 are fixedly connected by a chain fixing bracket 16. This connection method facilitates quick disassembly and adjustment of the seat 1 position, allowing for flexible changes in the seat 1 layout according to different testing needs, reducing maintenance costs and operational difficulty. In summary, through the above integrated design, this utility model improves the platform's anti-tipping capability and transmission stability while providing a riding experience highly similar to a real vehicle environment, balancing testing efficiency and maintenance convenience. Ultimately, it achieves the core goal of multi-purpose, high-efficiency testing, providing reliable experimental support for the optimized design of related products such as seats 1 and seat belts.

[0021] Specifically, seat 1 is equipped with a seat belt fixing bracket for installing a three-point seat belt. The tension wheel 15 includes a wheel body and an adjusting screw. The contact pressure between the tension wheel 15 and the chain 6 can be changed by rotating the adjusting screw. A rolling bearing is provided between the rotating shaft 3 and the bearing seat 4. The inner ring size of the rolling bearing is adapted to the rotating shaft 3, and the outer ring size of the rolling bearing is adapted to the bearing seat 4. The transmission rod 12 adopts a hollow steel tube structure. The aluminum profiles 7 are fixedly connected by angle brackets and bolts. The bottom of the support frame 22 is positioned with the top of the four-axis lead screw lifting platform 9 by positioning pins and then fixed with bolts.

[0022] Working principle: In use, this invention employs a four-axis synchronous trapezoidal screw lifting mechanism as the vertical power unit. The servo motor 8 outputs power, which is transmitted to the transfer case 23 via coupling 14. The transfer case 23 synchronously distributes the power to the four sets of transmission rods 12, driving the trapezoidal screw lifting mechanism 20 at the corresponding corners to move the T-shaped screw 21, thereby simulating platform lifting and bumpy conditions. The power-off self-locking function of the T-shaped screw 21 ensures platform stability. A chain-driven seat displacement platform serves as the horizontal power unit, using a three-phase asynchronous... Motor 5 drives drive wheel 11 and tension wheel 15 to rotate via chain 6. One end of chain 6 is connected to chain fixing bracket 16 below frame 17, which drives slide 2 to move horizontally along wedge-shaped guide rail 13-slider 18 structure, thereby simulating acceleration, rapid acceleration and rapid deceleration conditions. At the same time, the platform is equipped with real car seat 1 and three-point seat belt fixing bracket. In the coordinated movement of the dual mechanisms, it not only realizes the simulation of real driving experience, but also tests the support of seat 1 and the protection of seat belt, providing experimental data support for the optimization of related products.

[0023] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A novel two-degree-of-freedom motion testing platform, comprising a chain-driven seat displacement platform and a four-axis synchronous trapezoidal screw lifting mechanism, characterized in that, The chain-driven seat displacement platform is fixedly connected to the four-axis synchronous trapezoidal screw lifting mechanism by bolts. The chain-driven seat displacement platform includes a seat (1), a slide (2), a rotating shaft (3), a bearing seat (4), a three-phase asynchronous motor (5), aluminum profiles (7), a drive wheel (11), a guide rail (13), a tensioning wheel (15), a chain fixing bracket (16), a frame (17), a slider (18), and a support frame (22). The frame (17) and the support frame (22) are both welded from multiple aluminum profiles (7). The frame (17) is fixedly installed below the slide (2). The chain fixing bracket (16) is fixedly installed below the frame (17). The seat (1) is fixedly installed on the top of the slide (2). The slider (18) is fixedly installed below the frame (17) and engaged. On the guide rail (13), the guide rail (13) is fixedly installed on the top of the support frame (22), the three-phase asynchronous motor (5) is fixedly installed inside the support frame (22), the bearing seat (4) is fixedly installed on the side of the guide rail (13) by bolts, the tension wheel (15) is fixedly installed in the middle of the rotating shaft (3), the rotating shaft (3) is fixedly installed at the end of the bearing seat (4) away from the guide rail (13), the tension wheel (15) close to the three-phase asynchronous motor (5) is connected to the output end of the three-phase asynchronous motor (5) through the chain (6), the chain (6) is connected to the periphery of multiple tension wheels (15), and one end of the chain (6) is fixedly connected to the bottom of the chain fixing bracket (16); The four-axis synchronous trapezoidal screw lifting mechanism includes a servo motor (8), a transfer case (23), an upper platform (9) for four-axis screw lifting, a lower platform (10) for four-axis screw lifting, a transmission rod (12), a coupling (14), a screw nut (19), a trapezoidal screw lifting mechanism (20), and a T-shaped screw (21). The servo motor (8) is fixedly installed on one side of the lower platform (10) for four-axis screw lifting. The transfer case (23) is fixed to the middle of the lower platform (10) for four-axis screw lifting by bolts. The output end of the transmission rod (12) is fixedly connected to the input end of the transfer box (23) via a coupling (14). The two ends of the transmission rod (12) are fixedly connected to the output end of the transfer box (23) and the trapezoidal screw lifting mechanism (20) via couplings (14) respectively. The T-shaped screw (21) passes through the four-axis screw lifting platform (9) and is fixedly connected to the trapezoidal screw lifting mechanism (20). The lower end of the T-shaped screw (21) is fitted with a screw nut (19). The four-axis screw lifting platform (9) is fixedly connected to the bottom of the support frame (22).

2. The novel two-degree-of-freedom motion testing platform according to claim 1, characterized in that, The guide rail (13) is set in two groups, and each group of guide rail (13) is equipped with two sliders (18). The sliders (18) and guide rail (13) are wedge-shaped. The contact surface of the sliders (18) and slide table (2) is designed with anti-slip structure.

3. The novel two-degree-of-freedom motion testing platform according to claim 1, characterized in that, The trapezoidal screw lifting mechanism (20) is set into four groups, which are respectively fixedly installed at the four corners of the four-axis screw lifting lower platform (10) by bolts. The screw nut (19) is threadedly engaged with the T-shaped screw (21), and multiple screw nuts (19) are fixedly welded to the four corners of the four-axis screw lifting upper platform (9).

4. The novel two-degree-of-freedom motion testing platform according to claim 1, characterized in that, The seat (1) is provided with a seat belt fixing bracket for installing a three-point seat belt. The tension wheel (15) includes a wheel body and an adjusting screw. The contact pressure between the tension wheel (15) and the chain (6) can be changed by rotating the adjusting screw.

5. A novel two-degree-of-freedom motion testing platform according to claim 1, characterized in that, A rolling bearing is provided between the rotating shaft (3) and the bearing seat (4). The inner ring size of the rolling bearing is adapted to the rotating shaft (3), and the outer ring size of the rolling bearing is adapted to the bearing seat (4). The transmission rod (12) adopts a hollow steel pipe structure.

6. A novel two-degree-of-freedom motion testing platform according to claim 1, characterized in that, The aluminum profiles (7) are fixedly connected by angle brackets and bolts. The bottom of the support frame (22) is positioned with the top of the four-axis screw lifting platform (9) by positioning pins and then fixed with bolts.

Images