CN2473173Y - Pulley type suspending arm hoist - Google Patents

Abstract

The utility model relates to a pulley type suspending arm crane for lifting cargos frequently and the weight of the cargos is less than 1000 kilograms. The crane mainly consists of an upright pillar, a suspending beam, a windlass and a moving cart which has a pulley; the crane is characterized in that the lifting and running parts of the crane adopt windlass and pulley mechanism, and costs low while the lifting height is large compared with the prior crane which adopts an electric block, and also is light and convenient. After lifted by the windlass, the heavy object can move to and fro along the suspending beam and rotate around the upright pillar.

Description

The pulley-type boom crane

The utility model relate to a kind of workshop or using on the manufacturing line, hoisting capacity is at the boom crane below 1000 kilograms, particularly relates to a kind of lifting and operating unit of boom crane.

The present boom crane that uses, employing is installed an electric block and is finished lifting and reciprocating function on cantilever beam mostly.The electric block cost is higher, simultaneously because the scantling length of electric block own is bigger, so that influenced the having than sling height of its complete machine.Moreover, must increase the load and the swing inertia of cantilever beam because this body weight of electric block is bigger.

The purpose of this utility model, to provide exactly a kind of cost lower, under the equal situation of complete machine height, effectively sling height is bigger and use the pulley-type boom crane of light and flexible than using electric block.

Solution: column is fixed on ground or other objects, the headstock that winch and cantilever beam are housed is connected with column, and the headstock can rotates with respect to column.A dolly that can move along beam is installed on the cantilever beam, two fixed pulleys are installed on the dolly, there is a movable pulley at the suspension hook place, around the movable pulley at fixed pulley on the travelling car and suspension hook place and another fixed pulley on the dolly, be fixed on the projecting end of cantilever beam by the steel wire rope head of winch output then.Working process is the starting winch weight of slinging, and the hand push weight can make it rotate along the cantilever beam crank motion with around column.

Utilize accompanying drawing that the utility model is described further below.

Fig. 1 is the front view of pulley-type hoisting crane.

Fig. 2 is the B-B cutaway view among Fig. 1.

Column 1 is fixed on ground or other object; The headstock 2 is installed on the column 1 and column 1 rotation relatively; Winch 3 is installed on the headstock 2; Cantilever beam 6 one ends and the headstock 2 are hinged, and the other end overhangs; Pull bar 4 one ends and the headstock 2 are hinged, and the other end and cantilever beam 6 are hinged; Dolly 5 is installed on the cantilever beam 6 and can moves back and forth along beam, and two fixed pulleys 7,8 are housed on dolly 5; Movable pulley 10 is suspended on the steel rope 9; 9 one of steel ropes are wrapped on the winch 3, and the fixed pulley 8 on a fixed pulley 7, movable pulley 10 and the dolly 5 on the dolly 5 is walked around in the other end; Be fixed on the projecting end of cantilever beam 6 then.Suspension hook 11 is installed on the movable pulley 10.

Working process: behind the starting winch 3, steel rope 9 stretches around three pulleys 7,8,10 and changes its output length, weight is risen or descend and finish hoisting function, need when moving, cantilever beam 6 can use the hand propelled weight, this moment, dolly 5 moved along beam, and pulley 7,8,10 is owing to be subjected to external force and then adhere to steel rope 9 and roll; Realize the function that moves back and forth along beam thus.Be the center with column 1, weight is that the tangential direction of radius is then finished rotatablely moving of weight to the weight application of force.

Claims (1)

1. A kind of pulley-type boom crane is made up of column 1, the headstock 2, winch 3, pull bar 4, dolly 5, cantilever beam 6, fixed pulley 7,8, steel rope 9, movable pulley 10, suspension hook 11; It is characterized in that: two fixed pulleys 7,8 are installed on the dolly 5, and one of steel rope 9 is wrapped on the winch 3, and fixed pulley 7 is walked around in its other end, and movable pulley 10 and fixed pulley 8 are fixed on the projecting end of cantilever beam then.

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