Lever hoist is a kind of hoisting wire rope drawing tools

Lever hoist is a kind of hoisting wire rope drawing tools, when working by hand pull (handle, alternative action by rocker, connecting rod in the clamping mechanism, driving load forward or backward. Because there is no brake lever hoist wire rope, so the chainb lock mechanism is grasping mechanism brake mechanism, is the key to this kind of product. Design lever hoist wire rope, the main problem is the design of clamping mechanism is calculated. Since there is no uniform design specification, we are updated according to many years of three generations of the product design, test and production experience, the design and calculation method of the following are put forward. These data and the method also can be used for reference in the other wire rope in the design of clamping mechanism. Clamp, the size of the clamping plate of the basic calculation of the clamping lever hoist mechanism by the clamp, the clamping plate and pin shaft and the clamping plate links together the side panel, etc. Bridges, buildings and pipelines male door USES, such as zero pull wire rope hoist and the dove was buried a butterfly wing, products, drop a kwai column fresh technology hoist equipment refers to the atmosphere, the reliability index are mechanical efficiency index. But in the past for this product cheeper guan xing code stool mantra against atmosphere xin xin wing code is actually is, handsome model calculation rate value is high. With a rose the silting Lin Xiong, loss of greater than kang wipe clamp body parts of crank rocker articulated order also has two ways: type NHss wire rope lever hoist is brought type, Hs yao products for fork type switch (pick and hinged points). Different hinge order affects only Fried, chu clamp body parts alternately in order. Transmission series and clamp body parts are articulated order does not affect the mechanical efficiency calculation method proposed in this paper is practical, so type NHss single-stage waste shu transmission structure, using a vertical hanging, lifting load Q is working as an example, discuss the Zha calculate mechanical efficiency. According to figure 1 shows that human pull (forward in hand back and forth on the casing, the crank rocker rotary oscillation and auxiliary into work. With the aid of leverage, and alternating and direct money traction load direction, as a work of algal especially '~ to clamp of load"