Winding and unwinding device and roller shutter mechanism of greenhouse

Abstract

The invention discloses a winding and unwinding device and a roller shutter mechanism of a greenhouse. The winding and unwinding device comprises a transmission mechanism and a driving mechanism used for driving the transmission mechanism to move. The transmission mechanism comprises a shell provided with a lead screw nut, a lead screw, a gear, a driving wheel, a driven wheel and a winding shaft, the lead screw penetrates through the shell and is connected with the lead screw nut in a matched mode, the gear meshes with the lead screw, the gear is in transmission connection with the driving wheel, the winding shaft is erected and located above the driving wheel and the driven wheel, and the end part of the winding shaft abuts against the driving wheel and the driven wheel at the same time. The winding shaft used for a roller shutter is not connected with the gear of the transmission mechanism and is placed between the driving wheel and the driven wheel, a power source of the roller shutter is friction force generated between the winding shaft and the driving wheel, so that the winding shaft and the transmission mechanism are both in a constant-speed rotation state, the winding shaft can rotate along with the increase of the thickness of the roller shutter on the winding shaft, the rotating speed of the transmission mechanism is not changed, so that the roller shutter on the greenhouse is not pulled, and the quality and the service life of the roller shutter are ensured.

Description

technical field [0001] The invention relates to the technical field of agricultural machinery, in particular to a winding and unwinding device and a rolling shutter mechanism for a greenhouse. Background technique [0002] Now agricultural development uses greenhouses to make crops grow in winter. Greenhouses are generally right-angled triangles with hypotenuses. The hypotenuses use the light transmission of plastic sheets. Plants receive light through the plastic sheets during the day, but at night , It is necessary to add straw curtains or insulation quilts on the plastic sheeting to prevent the crops from freezing to death in the cold night. At this stage, there are straw curtains and heavy objects on each greenhouse. The greenhouse built on the ground has a bow-shaped upper part and the curvature gradually increases from the highest point to the lowest point. The straw curtain covers the upper part of the greenhouse. One end is on the upper part of the greenhouse, and t...

AI Technical Summary

Problems solved by technology

At this stage, there are straw curtains and heavy objects on each greenhouse. The greenhouse built on the ground has a bow-shaped upper part and the curvature gradually increases from the highest point to the lowest point. The straw curtain covers the upper part of the greenhouse. One end is on the upper part of the greenhouse, and the other end is on the bottom of the greenhouse. It is laid parallel to the sides of the greenhouse. The heavy objects press the curtains on the upper part of the greenhouse. Due to the limitation of manpower, the straw curtains are generally relatively small and need to be removed from the greenhouse one by one. The bottom is pulled to the top, a lot of time is wasted in the process, and the growth of crops is delayed. Although there is an automatic roller shutter mechanism for greenhouses in the prior art, its driving mechanism is often directly connected to the reel. When the roller shutter on the reel becomes thicker and thicker , will cause the linear rotation speed of the reel to change, and will not be synchronized with the driving mechanism, so that the driving mechanism will cause damage to the roller blind, such as the greenhouse roller shutter mechanism with the publication number CN207099900U and a temperature-sensitive The greenhouse that controls the roller blind machine cannot realize the uniform speed of the reel, which causes the driving mechanism to pull the roller blind

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