A six-degree-of-freedom double-parallel type heavy swing platform with load balancing devices

Abstract

A six-degree-of-freedom double-parallel type heavy swing platform with load balancing devices comprises a lower bottom plate, three bosses, six driving branches, three load balancing devices and a bearing platform. The load balancing devices include a right-angle trapezoidal seat, two double-rails, four guide rail locks, two connecting bases, two support rods, two sets of first fixed pulleys, two protective covers, two balanced hydraulic cylinders, four moving pulleys and four chains. The three load balancing devices increase the support points of the bearing platform, and can realize a super large bearing surface of the swing platform, increase the structural stiffness, alleviate the driving loads on the driving branches and raise the bearing capability of the swing platform. The swing platform of the invention is safe and reliable, and is large in working space and high in structural stiffness. Furthermore, the swing platform has super large carrying capacity.

Description

technical field [0001] The invention relates to a parallel mechanism, in particular to a parallel heavy-duty swing platform. Background technique [0002] In recent years, with the continuous and in-depth research on parallel mechanisms, the application fields of parallel mechanisms have been continuously expanded in the motion simulation of large equipment such as aircraft and vehicles, and higher requirements have been put forward for their bearing area, load capacity, and stiffness. In the current six-degree-of-freedom parallel motion simulation table products, the maximum load is several tons when the drive form is motor, and the maximum load is generally less than 20 tons when the drive form is hydraulic, so the developed one has a large load and can provide a large work space. The parallel kinematics simulation platform is imminent. [0003] Chinese patent 03150629.1 discloses a high-pressure pneumatic gravity balance space motion simulator, which consists of a parall...

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Problems solved by technology

[0003] Chinese patent 03150629.1 discloses a high-pressure pneumatic gravity balance space motion simulator, which consists of a parallel six-degree-of-freedom motion platform, a simulation cabin, a heave motion platform and a safety protection system. Its main feature is that it is used for large-value heave motion However, the gravity and inertia of the load are mainly borne by the parallel motion simulation mechanism, which is not suitable for large-area load-bearing platforms, and the load-bearing capacity has not been improved.

[0004] Chinese patent 200820004705.0 proposes a large-load six-degree-of-freedom electric platform. The mechanism includes six electric cylinders and at least three cylinders evenly arranged to simulate the movement of aircraft, tanks, etc. Due to the length limit of the electric cylinder body, the range of motion of the moving platform is limited. Small, directly driven by electric and cylinder at the same time, mechanical locking cannot be realized, and the safety for super large loads is low

[0005] Chinese patent 201210154506.9 proposes a six-degree-of-freedom large bearing surface statically balanced parallel motion simulation table, including a dynamic platform, a base, a static load balancing device, and six motion branches with the same structure connecting the dynamic platform and the base. The swing table is to provide a This is a six-degree-of-freedom large bearing surface statically balanced parallel motion simulation table with small size, large bearing surface and working space, which can withstand heavy loads and greatly reduce the output power of the motor. However, because it is driven by a motor, it cannot bear super large loads.

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