Spiral lifting device

Abstract

The invention discloses a spiral lifting device. The spiral lifting device comprises a lead screw, a stepped nut, a stepped shaft, a pair of corner contact bearings, a sleeve, a gear, a bearing sleeve, an upper end cover and a lower end cover. The lead screw is vertically and fixedly mounted. The stepped nut and the stepped shaft sequentially sleeve the lead screw and form a nut-step shaft. The pair of corner contact bearings, the sleeve and the gear are sequentially arranged on each shaft segment of the stepped shaft. An annular boss is arranged on the stepped shaft. The pair of corner contact bearings are mounted on the two sides of the annular boss in a back-to-back manner. The bearing sleeve sleeves the pair of corner contact bearings. The upper end cover and the lower end cover are incorrespondingly static connection with the upper end and the lower end of the bearing sleeve. According to the spiral lifting device, a corner contact shaft is used for force transmission and load transfer, and isolation of rotating motion is realized; when a bearing component moves up and down and rotates, rotating motion is counteracted by the corner contact bearings, and the bearing sleeve only moves up and down, so that the bearing component only needs to bear the weights of cargoes and the weight of a lifting platform, loads are reduced, and the work is more reliable.

Description

technical field [0001] The invention relates to a spiral lifting device. Background technique [0002] With the increasing popularity of air conditioners, refrigerators, washing machines and cars, home appliance sellers have increasingly urgent needs for intelligent access systems for heavy appliances; in addition, the problem of difficult parking for cars has become increasingly prominent, and there is also an urgent need to develop intelligent access systems. For the design of intelligent access systems for heavy goods such as air conditioners, refrigerators, washing machines, and automobiles, the primary consideration is how to improve space utilization. Therefore, warehouses are usually designed in the form of three-dimensional multi-storey, and the lifting platform of the access device realizes heavy-duty Lifting of goods. [0003] The nut screw screw device has a self-locking function. Multiple nut screw screw pairs are used to drive the lifting platform synchronously...

AI Technical Summary

Problems solved by technology

The lifting of the common nut screw screw drive platform is realized by driving the screw to rotate and drive the nut statically connected with the platform to do the lifting movement. For the heavy cargo intelligent storage system, in order to improve the space utilization, it is necessary to increase the three-dimensional multiple The number of layers in the layer warehouse leads to large size, heavy weight and large inertia of the lead screw

If the screw is used to drive the up and down movement of the lifting platform, the bearing supporting the rotation of the screw must bear the weight of the screw in addition to the weight of the heavy goods and the lifting platform, which will easily cause the supporting bearing to be overloaded and fail. Once the bearing fails, the whole system cannot work, and it is inconvenient to replace the failed bearing and the economic cost is high

Therefore, the nut-screw helical pair that drives the nut through the rotation of the screw to perform lifting motion cannot meet the driving requirements of the lifting platform of the heavy-duty cargo access system.

Images