Hoisting Mechanism 75JLF45

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The products are independently developed and manufactured by our company via absorbing international and domestic advanced technologies.

Natinal Patented products:Patent 1:ZL2009 2 0243653.7

Hoisting Mechanism of Tower crane Patent 2:ZL2010 20226428.5.

Combined-type winding drum used in winch JLF series products adopt the structural style of variable frenquency motor +SNGW reducer+winding drum.S-NGM reducer is employed for the first time in China with the precision of all gears up to over 6 level and features of less noise, compact structure, light weight and convenient maintenance.



Rated single rope tension(kN):45


Rated power of the motor (kW):75

Working frequency(Hz):6-50-100

Hoisting speed (m/min):2.7-22-45

Hoisting capacity(t):16-16-8

Rope capacity(m):550(5 layers)/804(7 layers)

Nominal Diameter of wire rope (mm):Φ20

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Q:How does a crane make work easier? ( In the scientific way, Force x Distance... you know)?
The type of crane she is referring to ia a simple pole with a fulcrum placed between the person operating the crane, and the mass to be lifted. Imagine a weightless pole with a rope tied to one end attached to a mass of weight 224 lbs The pole is 9 feet long Let's say the human weighs 112 lbs, or half of what is to be lifted. Without a crane, it will be difficult to lift that much and swing it around. With the crane, though, let's look at the advantage when a fulcrum is placed under the pole and the person pushes down on the pole to lift the weight. First, note that gravity is in favor of the person to use their weight on the pole. Using physics, with the fulcrum place at x from the mass to be lifted, the downward force of the person is F*(9-x)=224*x or F=224*x/(9-x) now plug in some values for x and compute the force: x F 4.5 224 3.5 143 2.5 86 1.5 45 0.5 13 I started by placing the fulcrum exactly in the middle and then moving the fulcrum in increments of 1 foot closer to the weight to be lifted Notice that the more pole towards the person pressing down, the less force the person has to apply to lift the weight. Also, note that when the fulcrum is in the middle, the person must apply a downward force equal to the weight - which willl be difficult foir a person that weighs 112lbs. However, once the fulcrum is placed 2.5 ft from the weight, the person only need apply 86 lbs of downward pressure. Leverage. j
Q:Who is responsible for the construction of the pile foundation of the tower crane?
According to the present list of quotations, the winning project, the tower crane cost has been included in the total price, and has nothing to do with the construction side, that is, the cost of tower crane foundation should be borne by the construction side.
Q:Type and specification of tower crane,
QTZ40分4708、4808、500850 500863 5010 5013 551080 5513125 6015160 6018180 6524250 7030315 7050
Q:crane operator?
Category: Cars Transportation Your 'question': crane operator? Possible answers that come to mind. Yes. No. They exist. And my personal favorite, WHAT is your question, and how does it connect to cars and transportation?
Q:When is this Crane Fly season over?
Crane flies are totaly harmless to humans.They fly for some time and fall down to earth.Ants will take them away.These flies never byte or sting. Pet Cats like to play with it and catch it.They will disappear after some time. Do you know that crane flies spend most of their lives underground in their larval forms, which are known as leatherjackest?. Leatherjackets were very common round here, and are a favourite food of the local crows .These leatherjackets transform into crane flies.Summer is their growth time.
Q:What did Stephen crane contribute to history?
I think his greatest contribution was The Red Badge of Courage. It was the most ealistic portrayal of a Civil War soldier written at the time; so real, in fact, that veterans swore the had fought alongside him during battle (Crane wasn't even alive during the war).
Q:Do you know where Ty Crane is now? The one in the film coach carter?
Ty Crane was played by Sidney Faison full-time basketball player and part-time actor. When I last heard of him he was playing for the Magic Johnson Travelling All-Stars
Q:How many tons of tower crane QTZ80A lifting?
Lifting torque = mass * radius of gyration (amplitude). That is to say, the bigger the weight is small.
Q:How many types of crane?
Types Of Crane
Q:How do they get the cranes and counterweights down off the top of buildings when finished?
sometimes they dont. i have heard of buildings where they left the crane body as the structure for the elevator

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