CN85200231U - A crane with its centre of gravity fixed on the vertical middle line - Google Patents

Abstract

Usually, a movable crane keeps balance by self-weight when operated. The utility model relates to a crane of which the gravity center is fixed on the vertical central line, and is composed of a chassis, an upright post, a cross rod and a power counterweight vehicle, wherein, the power counterweight vehicle provides power and is equivalent to the variable counterweight of the crane to make the gravity center of the crane always lie in the vertical central line of the upright post. Thereby, the crane keeps balance. The utility model has the advantages of simple structure, low cost, and light self-weight, and can be moved. A large crane can be used for hanging operation with heavy weight, large hanging amplitude and large displacement in the air. A small crane can be used as a loading and unloading apparatus for some work occasions.

Description

A crane with its centre of gravity fixed on the vertical middle line

The field of utility model: the principle that the utility model utilizes variable counterweight and weight to balance each other is on the midperpendicalar hoisting crane center of gravity all the time, thereby keeps the balance of hoisting crane.

The situation of prior art: do not find the crane hoisting equipment identical with the utility model feature through consulting pertinent data.

See:

" hoisting and hanging technology "

" lifting of building structure "

" loading-unload machine is selected and configuration "

The purpose of utility model: the purpose of this utility model is that integral hoisting etc., some particular job occasions of reaching especially big, extra heavy object such as heavy wares, heavy construction member, grid structure, shell roof system on the grain that takes on kiln, grain threshing ground, medium and small grain depot for no dome brick kiln admittedly provide a kind of and can shift easily that work place, deadweight hang for a short time that the width of cloth is big, hoisting capacity is big, available space is big, simple in structure, crane hoisting equipment that cost is low, thereby reduces labor intensity, increases work efficiency, reduces construction cost.

The formation of utility model: " center of gravity is the hoisting crane on midperpendicalar all the time " described in the utility model is made up of chassis, column, cross bar, power weight vehicle.Wheel or crawler belt are housed under the chassis can passive or initiatively walk, column and chassis are fixed, thrust baring is equipped with on the top, column and chassis also can be made fabricated, the cross bar mid point is fixed with a minor axis and inserts in the thrust baring centre hole, also can otherwise locate, cross bar can freely rotate in the horizontal direction, each fixes a pulley in the middle of the cross bar and two ends, a winch and counterweight are housed on the power weight vehicle, the steel rope that has suspension hook on the winch also can replace one section steel rope between power weight vehicle and the cross bar termination, top on three pulleys of cross bar with assembly pulley.The power weight vehicle can be reequiped the weight that its weight is slightly larger than the lifted weight thing with the also available heavy tracked vehicles of hand barrow.Other has one of steel cable and power weight vehicle to fix, and the cross bar termination of other end and top is fixed, and its length equals the vertical distance of power weight vehicle to cross bar termination, top.

During work, start the winch hoisting heavy, the power that weight puts on the steel rope equates all the time that with the power that the power weight vehicle puts on the steel rope friction force between the wire rope pulley can be ignored.The tension force of power weight vehicle part gravity and steel rope balances each other, the difference of gravity and tension force still acts on the ground, the counterweight of hoisting crane described in the utility model can be regarded a variable as, it acts on an end of steel rope and equates with the power that weight acts on the other end of steel rope all the time, to hoisting crane integral body (chassis+column+cross bar+weight+variable counterweight) and the heart of overstating is on how much midperpendicalar all the time, promptly on the axis of column.Weight winches to and gives take the altitude, is radius with manpower or power driven power weight vehicle along cross bar half length, and the column axis is the garden arc motion at center, and weight can reach on any point of relative garden arc, put down weight, suspension hook is got back to initial position and is then finished a cycle of operations.The also available chain of above-mentioned steel rope and pulley, sprocket wheel replace.

The advantage that is had compared with prior art:

When movable crane is worked usually, rely on deadweight to keep balance, hoisting capacity with hang the width of cloth and be difficult to take into account, goliath complex structure, cost are high, rely on guy, earth anchor to keep balance during lifting mast work, surrounding space is cut apart by guy, and effective working space is less, and demolition, installation inefficiency, cycle are long.Many masts lift that synchronous difficulty, suspended object are stressed to be difficult for evenly, and efficient is low, it is little to be shifted in the air.

Hoisting crane described in the utility model relies on variable counterweight to keep balance when working, member stress is reasonable, simple in structure, deadweight is little, the focus of work is low, hang that the width of cloth is big, column and cross bar meet at right angles, effective working space is big, the power weight vehicle can be used hand barrow, truck or the repacking of heavy continuously tracked vehicle, cost is lower, can less cost to finish hoisting capacity big, hang the hoisting and hanging work that the width of cloth is shifted big greatly, in the air, also can be used to replace some artificial handling labor to alleviate manual labor, improve work efficiency, reduce shipping and delivery cost.

The drawing explanation: the represented power weight vehicle (1) of the structural representation of " center of gravity is the hoisting crane on midperpendicalar all the time " has running gear, winch and counterweight are housed, available hand barrow, the tire vehicle, continuously tracked vehicle and have the large-scale mine machinery refitment of track unit, chassis (2) has wheel or track unit, also can be during work directly by being placed on the ground, column (3) is installed on the chassis, vertical with horizontal surface, can directly be installed on the ground when needing, thrust baring (4) or other device that reduces friction are equipped with in the column top, cross bar (5) mid point is above the column top, can insert axle or alternate manner location, cross bar is vertical with column also can to rotate in the horizontal direction, the chassis, column, cross bar can be used timber, steel etc. are made, can be solid, tubulose or lattice becomes, cross bar can be a single-piece, also can form by isometric two parts, cross bar and pull bar (6) can constitute equicrural triangle, also can constitute rhombus, be that steel rope (7) that suspension hook is arranged is in the middle of cross bar and on the pulley at two ends on the winch.

Realize best mode of the present utility model: it is more than tens tons that the utility model can be used for hoisting capacity more economically; it is big to hang the width of cloth; the big hoisting and hanging work of aerial displacement; press dress as the shell roof system at ground construction; thereby the one piece lifting can be accomplished roof system and room frame and construct simultaneously by dress; avoid a large amount of aloft work; reduction of erection time and cost-cutting effectively; and hoisting capacity is below one ton; hang the width of cloth and be several meters, often shift jobs the handling labor in place as the kiln that takes on of no dome brick kiln in the working space of certain limit domestic demand; the grain threshing ground; store up on the grain of medium and small grain depot and wait to replace artificial loading and unloading; reduce labor intensity; improve work efficiency; reduce shipping and delivery cost.

Claims (3)

1, center of gravity is the hoisting crane on midperpendicalar all the time, feature is, power weight vehicle (1) has running gear winch and counterweight is housed, available hand barrow, the tire vehicle, continuously tracked vehicle and have the large-scale mine machinery refitment of track unit, chassis (2) has wheel or track unit, also can be during work directly by being placed on the ground, column (3) is by being placed on the chassis, vertical with horizontal surface, can directly be installed on the ground when needing, thrust baring (4) or other device that reduces friction are equipped with in the column top, cross bar (5) mid point is above the column top, can insert axle or alternate manner location, cross bar is vertical with column also can to rotate in the horizontal direction, the chassis, column, cross bar can be used timber, steel etc. are made, can be solid, tubulose or lattice, cross bar can be a single-piece, also can form by isometric two parts, cross bar and pull bar (6) can constitute equicrural triangle, also can constitute rhombus, be that steel rope (7) that suspension hook is arranged is in the middle of cross bar and on the pulley at two ends on the winch.

2, the described center of gravity of claim 1 all the time the hoisting crane on the midperpendicalar it is characterized in that steel rope (7) winch and above one section available running block between the pulley of cross bar termination replace.

3, by the described center of gravity of claim 1 all the time the hoisting crane on midperpendicalar it is characterized in that steel rope (7) and pulley can use chain, sprocket wheel to replace.

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