Six-freedom-degree static-balance parallel motion simulation platform with large bearing surface

Abstract

The invention discloses a six-freedom-degree static-balance parallel motion simulation platform with a large bearing surface, comprising a movable platform, a pedestal, a static load balance device, and six same motion branches which are used for connecting the movable platform with the pedestal, wherein six guide rail pedestals are uniformly fixed on the pedestal; the lower ends of the outer sides of the guide rail pedestals are provided with servo motors, double guide rails are arranged at the upper sides of the motors, and screw shafts are arranged among the double guide rails; the one ends of the screw shafts are connected with the shafts of the motors, and the other ends of the screw shafts are connected with the bearing seats on the upper ends of the guide rails pedestals; sliding blocks are arranged on the double guide rails; the outer sides of the sliding blocks are connected with the one ends of support rods through rotary connection pieces, and the other ends of the support rods are connected with the movable platform through the rotary connection pieces; the upper ends of the sliding blocks are fixed with the one ends of steel wire ropes, and the other ends of the sliding blocks bypass through the fixed pulleys on the upper ends of the guide rail pedestals so as to be connected with the inner sides of the guide rail pedestals by a manner of weighting; and the upper ends of the weights are provided with two guide wheels, and the two sides are provided with double vertical columns which are fixed on the pedestal. The six-freedom-degree static-balance parallel motion simulation platform with the large bearing surface can bear heavy load and has the advantages of small volume and large work space.

Description

technical field [0001] The invention relates to a parallel mechanism, in particular to a parallel motion simulation device. Background technique [0002] The structure and design of the six-degree-of-freedom parallel motion simulation table are proposed on the basis of the Stewart structure. Its basic form is composed of six telescopic links, a base and a working platform. Most of the telescopic links are controlled by electric cylinders. or hydraulic cylinders. When the telescopic rod is driven by an electric cylinder, it has the advantages of strong overload capacity, easy realization of high-precision servo control, and flexible movement, but its output force is limited, and it cannot simulate large equipment such as vehicles and aircraft; when the telescopic rod is a hydraulic cylinder When driven, the moving platform can withstand heavy loads, but the shortcomings of the hydraulic system, such as large volume, easy leakage of components, high maintenance costs, and poo...

AI Technical Summary

Problems solved by technology

In order to realize the large load-bearing surface parallel motion simulation platform, some solutions have been proposed: for example, Chinese patent 200820004705.0 discloses a large-load six-freedom electric platform, which includes six electric cylinders and at least three cylinders evenly arranged, It is used to simulate the movement of aircraft, tanks, etc. Due to the limitation of the length of the electric cylinder body, the movement range of the moving platform is small. At the same time, the motor swings with the electric cylinder and consumes a large part of the power, which indirectly limits the effective load of the platform.

Chinese patent 200820071231.1 discloses a motion platform for a six-degree-of-freedom vehicle driving simulation system. The mechanism is driven by a hydraulic cylinder. The upper platform is a hollow platform. As a result, the structure size of the upper platform is very large, the mechanism takes up a lot of space, and the power consumption of the motor increases. At the same time, the six high-power hydraulic cylinders require a large pump station, the overall mobility of the system is poor, and there are many problems such as noise and oil and gas treatment.

Chinese patent 200410050354.3 discloses a new six-degree-of-freedom gravity balance mechanism. The load is composed of a series of connecting rods and kinematic pairs in series. The power is only provided by a torque motor or servo motor, so the system cannot bear heavy loads, and the system poor dynamic performance

Chinese patent 03150629.1 discloses a high-pressure pneumatic gravity balance space motion simulator. The mechanism is suitable for motion simulators that require large-value heave motions. When compensating for the other five degrees of freedom, the range of motion and dynamic performance of the mechanism have certain limitations

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