Design of Spatial Cam Surface Used on Windproof Refuse Bin with Envelop Method
The present cam design method cannot meet the requirements for accurate spatial movement of certain spatial components and followers.An envelope-based cam design method is proposed,which can make the cam to accurately control the openning of refuse bin cover due to changes in wind force.According to cam design principles,cam envelop curve is modeling in simple plane and the envelop equation is solved.Then a corresponding envelop curve is modeling in other plane where the wind direction of the wind sensing bracket is located..Thus clusters of intersecting spatial envelope curves are formed.To organize cam profile point data,parallel spatial envelop curve clusters are built.With regression of profile point the parallel spatial envelop curve clusters equation is built.The regression parameter is observed with coordinate variation which is vertical to curve clusters.Furthermore the numerical equation is observed.The design mehtod can accurately build cam spatial profile and realize accurate control of the cam.The design method has a process and the solution specification can achieve program portiing and promotion.
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