The screw jack, also known as the mechanical jack, is driven by a manpower through a screw pair, and a screw or nut sleeve is utilized as a jacking member. The normal screw jack supports the pounds by the thread self-locking function, and the structure is simple, but the transmission efficiency can be low and the return stroke is slow. The thread of the self-propelled screw jack has no self-locking action and has a brake. When the brake is released, the weight can be quickly lowered by itself and the return period can be shortened, but the framework of the jack is certainly complicated. The screw jack can support heavy objects for a long period, and the maximum lifting capacity has already reached 100 tons, which is widely used. Following the horizontal screw is mounted on the lower part, the weight can be traversed at a small distance.

Principle of use:

The mechanical jack is among the types of manual lifting tools. Its compact structure makes reasonable usage of the rocking of the rocker to rotate the pinion. It really is operated by a set of conical gears to operate a vehicle the screw to rotate and push the lifting sleeve so that the fat rises or decline.

Instructions:

1. Before use, it’s important to check if the jack is normal, whether the components are flexible, put lubricating oil, and properly estimate the excess weight of the large object. Make use of a jack of suitable tonnage and steer clear of overloading.

2. Adjust the method of supporting one’s teeth on the rocker. First of all, turn the rocker straight in the clockwise path by hand to make the lifting sleeve quickly ascend the top weight.

3. Insert the handle into the rocker hole, move the deal with up and down, and the weight will rise. When the reddish warning line shows up on the lifting sleeve, the handle ought to be stopped immediately. If you want to lower the teeth in the opposite direction, the fat will start to fall.

Precautions:

1. Constantly keep the top of machine clean, Universal joint examine the internal structure regularly, make the pinion in the rocker versatile and dependable, and lift the lifting sleeve freely.

2. The friction surface between your lifting sleeve and the housing must be oiled at any time. Other essential oil filling holes ought to be lubricated regularly.

3. In order to consider the protection used, avoid overloading, use illness, it is not appropriate to use multiple units in order to avoid danger.