Threaded rod inside the screw jack would be exposed to the air during screw jacks' operation. To effectively prevent the components such as threaded rod, optical lever, shafts and column from pollution and destruction. A cover or support should be adopted for the protection which could also stretching or compressing with the components. Plastic or aluminum support ring is recommended for horizontal use to maintain a uniform distance between the inner cavity of the shield and the lead screw to extend the useful life. When the tensile length is large, a metal ring can be added to each fold to improve the stability of the shield -- the metal flange or collar type are usually used for the connection or fixed end.
Other way for protection is to sew a screw guard -- the round screw guard is made of stamped discs with two adjacent inner edges. The two outer edges are stitched together which achieves a better stabili-ty and horizontal firmness. Materials can be selected depending on the work environment.
Besides the processing method of the protecting cover,different materials and different processes should be also taken into consideration. The utility model relates to a screw protection cover supported by a steel ring, which adopts a plurality of fabrics,has a rigid wire ring support and works normally at a high temperature of 110° C and a low temperature of -40 ° C. Such cover effectively prevents dust, water, oil, emulsion and chemicals. It also has a neat appearance which not easy to be deformed by its tightness and firmness.It can also be used for ventilation, dust removal, etc. The flexibility of the item is not only in material choice, but also the customized diameter and length according to the specific requirements.
Application of the protection cover of screw jack
The protective cover of the screw jack can effectively prevent the damage of the screw from dust, oil, chemical, etc.to extend the useful life. To install that, it is necessary to add thread in the protruding positioning hole at the bottom of threaded rod, and then rotates that.The retrofitting can not be done for the finished product, custome-r should specify in advance whether the protective cover needs. The worm gear screw jack should be equipped with a protective cover. It is recommended to install a protective cover when products used in dusty, humid, oil or chemical corrosion, which effectively protected and extend the useful life.
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