CN205990186U - A kind of crane loading weight-limiting apparatus - Google Patents

Abstract

This utility model is related to a kind of crane loading weight-limiting apparatus, can effectively solving crane for hoisting freight weight limit mark problem, technical scheme is, including the movable pulley installing around on a steel cord and hook, movable pulley is contained on hold-down support by rotating shaft, hold-down support bottom is through spring equipped with hook, hook side is provided with the freight weight limit mark rod vertically extending downwards on hold-down support, the lower end of freight weight limit mark rod is less than the lower end of spring, this utility model structure novel and unique, advantages of simple, easily produce, low cost, identified by freight weight limit, prevent because the lifting indefinite potential safety hazard causing of Item Weight, easy to use, effect is good, there is good Social and economic benef@.

Description

Lifting weight limiting device for a crane

technical field

The utility model relates to a crane hook, in particular to a crane lifting weight limiting device.

Background technique

In the electric fused brick casting industry, from processing workshops to electric furnace workshops or sand mold workshops, the work objects range from tens of kilograms to tens of tons. Most of the objects are transported by beam cranes, and different workshops are equipped with different crane powers. The processing workshop is equipped with one-ton or two-ton cranes, the assembly workshop is equipped with five-ton cranes, and the electric furnace workshop is equipped with five-ton, ten-ton, and twenty-ton cranes. Crane lifting is not allowed to exceed the tonnage, otherwise there will be safety accidents. When weighing with a crane, the electronic scale will be hung. In other cases, the electronic scale will not be hung. There are also many times when objects of unknown weight need to be lifted. Some objects cannot be judged by weight. Blindly use the crane to lift. One is the safety of the crane equipment. , In addition, there are also hidden dangers to personal safety. There was once a company that used a crane to lift overweight objects, causing the crane to fall, resulting in a tragic accident that lost human life. improve.

Contents of the invention

In view of the above situation, in order to overcome the defects of the prior art, the purpose of this utility model is to provide a crane lifting weight limiting device, which can effectively solve the problem of crane lifting weight limit marking.

The technical scheme solved by the utility model is that a crane hoisting weight limiting device includes a movable pulley and a hook wound on a steel wire rope. On the fixed support, a weight-limiting marking rod extending vertically downwards is provided, and the lower end of the weight-limiting marking rod is lower than the lower end of the spring.

The utility model is novel and unique in structure, simple and reasonable, easy to produce, and low in cost. Through the weight limit mark, the safety hazard caused by the unclear weight of the lifting object is eliminated. It is convenient to use, good in effect, and has good social and economic benefits.

Description of drawings

Figure 1 is a sectional front view of a sand mold to be planed.

Fig. 2 is a side view of the utility model.

detailed description

The specific embodiments of the present utility model will be described in further detail below in conjunction with the accompanying drawings.

Provided by Fig. 1-2, the utility model includes a movable pulley 1 and a hook 5 wound on the wire rope, the movable pulley 1 is mounted on a fixed support 2 through a rotating shaft 8, and the lower part of the fixed support 2 is equipped with a hook 5 through a spring 4, One side of the hook 5 is provided with a weight limit marking rod 6 extending vertically downward on the fixed support 2, and the lower end of the weight limit marking rod 6 is lower than the lower end of the spring.

In order to ensure the use effect, the lower end of the weight limit marking rod 6 is provided with a horizontal reference rod 7 for easy observation, which makes the observation more intuitive;

The length of the weight limit sign bar 6 is L, the initial length of the spring 4 is l, and the gravity of the weight limit is F, then the elastic coefficient k=F/(L-l) of the spring, that is, the cranes of different weight limit tonnages are selected differently. The spring, the gravity of the lifting limit is F=mg, the lifting m is the limit weight, and g is the acceleration of gravity.

When the utility model is in use, the crane is hoisted by the hook, and the spring is stretched under the action of gravity. When the lower end of the spring exceeds the lower end of the weight-limited marking rod, it means that the gravity of the hanging item exceeds the weight-limited weight of the crane, and the hoisting should be stopped immediately. Compared with the prior art, the utility model has a novel and unique structure, is simple and reasonable, is easy to produce, and has low cost. Through the weight limit mark, it can be visually observed whether the object to be hoisted exceeds the weight limit of the crane, and it eliminates the problem of undefined weight of the hoisted object. It is easy to use, effective, and has good social and economic benefits.

Claims (3)

1. a kind of crane loading weight-limiting apparatus, including the movable pulley installing around on a steel cord（1）And hook（5）, its feature exists In movable pulley（1）By rotating shaft（8）It is contained in hold-down support（2）On, hold-down support（2）Bottom is through spring（4）Equipped with hook（5）, Hook（5）Side is in hold-down support（2）On be provided with the freight weight limit mark rod vertically extending downwards（6）, freight weight limit mark rod（6）Under End is less than the lower end of spring.

2. crane loading weight-limiting apparatus according to claim 1 are it is characterised in that described freight weight limit mark rod（6）'s Lower end is provided with the level of convenient observation with reference to bar（7）.

3. crane loading weight-limiting apparatus according to claim 1 are it is characterised in that described freight weight limit mark rod（6）'s Length is L, spring（4）Initial length be l, the gravity of freight weight limit is F, then coefficient of elasticity k=F/ (L-l) of spring.