The invention discloses an overhead working truck with a center-passing folding arm. The overhead working truck comprises a platform assembly, a platform leveling device, a connecting rod mechanism, a variable-amplitude oil cylinder, an upper arm assembly, a lower arm assembly and a truck body assembly, the platform leveling device comprises a leveling oil cylinder, a leveling hinged support and a closed enveloping chain mechanism; the connecting rod mechanism is a double-crank four-connecting-rod mechanism, a first connecting rod and a second connecting rod are connected through a connecting shaft, the upper arm assembly and the lower arm assembly are connected through four hinge points, and the large amplitude changing angle of the upper arm amplitude changing mechanism is larger than 180 degrees. According to the high-altitude operation vehicle, through the connection mode of combining four-connecting-rod amplitude variation, the closed chain and hydraulic leveling, under the condition that the length of the arm frame and the length of the whole vehicle are kept unchanged, the large amplitude variation angle of more than 180 degrees of the upper arm amplitude variation mechanism is achieved, the maximum operation amplitude and the maximum operation height of the high-altitude operation vehicle are increased, the large operation amplitude is achieved, and the working efficiency is improved. And the defect that the upper arm of the original folding arm high-altitude operation vehicle can only work above the lower arm is overcome, and the ground bearing operation is realized.
本发明公开了一种过中心的折叠臂高空作业车,包括:平台总成、平台调平装置、连杆机构、变幅油缸、上臂总成、下臂总成、车体总成;平台调平装置包括调平油缸、调平铰座和封闭式包络链条机构;连杆机构为双曲柄四连杆机构,通过连接轴连接第一和第二连杆,通过四个铰点连接上臂总成和下臂总成,实现上臂变幅机构180°以上的大变幅角度。本发明高空作业车通过四连杆变幅+封闭式链条及液压调平相结合的连接方式,在保持臂架长度和整车长度不变的情况下,实现上臂变幅机构180°以上的大变幅角度,增大高空作业车的最大作业幅度和最大作业高度,实现了大作业幅度,并解决了原折叠臂高空作业车上臂只能在下臂上方工作的缺陷,实现地面承入作业。
Overhead working truck with center-passing folding arm
一种过中心的折叠臂高空作业车
2024-12-13
Patent
Electronic Resource
Chinese
IPC: | B66F HOISTING, LIFTING, HAULING, OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD , Hub-, Verhol- oder Schubvorrichtungen, soweit nicht anderweitig vorgesehen, z.B. Vorrichtungen mit unmittelbarer Krafteinwirkung auf die Last |
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