New Type Heavy Duty Lifting And Translation Wagon Used By Retractable Spectator Stand

Retractable spectator stand is a kind of large size mechanical equipment with electric driven retraction mechanism.It is widely used in various types of venues,such as multiple functional halls in art or cultural centers,stadiums,and other kinds of art performing places.Due to the consideration of function variety,these venues generally require flexible space transformation,which can quickly convert from large flat space for activities such as dancing parties,wine parties or sports to spaces with seating stand to accommodate hundreds or even thousands of people for conferences or various performance events.Because of unique structure,retractable spectator stand can achieve fast extension and retraction.When extended,they can be spectator seating stand with the height gradually increasing from front to back.While retracted,all seats will be form multiple layer stacking,greatly reducing the floor space.Due to the structural limits,currently the domestically produced retractable stands can only move forward or backward in the direction of retraction at the retracted state.Therefore,the storage space is limited at two direction only,either in front of or behind the place of usage.Furthermore,because at the retracted state,the unit area deadweight of the stand is relatively large,making it very inconvenient to move by using other tools or equipment,which poses serious limitation on its application.This essay aims to design a heavy duty lifting and translation wagon which can be deployed in limited space.It is installed beneath the retractable stand.When the stand is at retracted state,the wagon can lift the stand to the height that the driving wheels of the stand get off the ground,and then the wagon can carry the stand to achieve transversal movement.This essay firstly studies the retractable stand structure to determine the space dimensions to deploy the lifting and translation wagon,and then determines the lifting height,load,speed,etc.according to the usage requirements of the retractable stand.After that multiple approaches of lifting and translational movement are analyzed to find a suitable plan for lifting and translational movement.Transmission components like motors,reducers and couplers are then preliminarily selected through calculations,followed by 3D modelling of the arrangement of each structure within the limited space,together with simulations of strength and deformation.The structure design is completed and prototype is made after comprehensive considerations are given from the perspective of structural optimization,feasibility in processing,manufacturing and installation,and also convenience in maintenance and service.Through load testing of the prototype,design defects are founded and corrected to finalize the design and put it to production.The success of innovative design of this model provides a unique new sports function audience telescopic stand for the market,greatly improving the competitiveness of the equipment and the use prospects.