trolley mechanism 4JXF4

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Introduction

The JXL trolley mechanism is a self-designed new product based on the advanced foreign technology, and got the national utility mode patents.

The JXL trolley mechanism constitutes torque motor, half built-in planetary reduction gear wound roll, rack, and other components, which has advantages of smooth shift from the brake, transmission efficency, low noise, compact structure, and brakeing safe, reliable, accruate positioning, pleasing in appearance, and other characteristics.

After changing variable-frequency speed regulation motor and electronic system, the institutions can be changed to JXF trolley mechanism, which has the advantages of zero velocity brake, starting speed more stable and is more suitable to large tower crane and the trolley running on a demanding place.

Performance parameters

Model:4JXF4

Motor Power(KW):4

Rated stalling torque of torque motor(N.m):

Rated single rope tension (N):4500

Single-rope linear velocity(m/min):0-58

Rope capacity(m):63

Wire rope diameter(mm):8

Relevant parameter of the suitable tower crane

--Max lifting load(t):10

--Max crest(m):65

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Q:About tower crane torque limiter with 4 limit switches, each play a role, thank you
Hook top point control: when the hook to the high limit, limit action, do not continue to hook!Overload control: when the weight exceeds the overload point or amplitude exceeds the maximum amplitude or the loading rate is more than 105% when the output control, prohibit the hook lifting action and prohibit car distance to allow the car to increase the amplitude, amplitude can be damped near.
Q:When inspecting a crane, which of the following does not need to be inspected?
Load capacity is not required to inspect provided that the crane was inspected by third party and certified to the loads
Q:How do they erect HUGE cranes without a crane?
They use Hydraulics. I don't know if you have any understanding of Fluid power but a hydraulics system can lift up to 400% of its weight multiplyed by its density. There are other factors to consider such as cylinder size, flow, and pressure but these are usualy constants. For example: If the hydraulic fluid used weighs 5 lbs. per gallon and its density is .9 gram per cubic centimeter then 1 gallon of this fluid could lift 53.1441 lbs. A jack system is hydraulic
Q:Mobile Cranes for Arctic usage?
this is not my area of study but i will give you something to consider. if you are looking for a large capacity crane for use on permafrost, you wont find one. the pressure placed on the permafrost by large weights will cause it to melt. anything that is heavy, like a house, will sink in the tundra just like it will in a swamp. for houses they excavate the foundation a build a giant wooden raft that the hose floats on. in ST Petersburg, Russians preferred a mix of reeds and slave laborers corpses's to build the raft. as long as the ground is not frozen there is somebody how makes what you want. if the ground is frozen, you will only find small machinery. best of luck ps dont look to hard. lots of diesel engines work great at sub-subfreezing temps.
Q:how do you put the battery in the crane stock for airsoft guns?
You first need a crane stock battery, as a normal battery won't fit in just one side of the crane stock. When you but the battery, you'll have two or three clusters of cells. Begin experimenting with the cord placement in the stock, by putting one cluster on one side and one (or two) on the other. You'll see what I mean when you get the gun. That's all there is to it, just a little experimenting.
Q:How does a crane get down from a skyscraper once they're done using it? Like the crane on top of the skyscraper, do they get take it apart?
realdolby is correct. Small crane from parts that can be transported in service elevator is brought up and assembled. It is used to swing out and lower larger crane's parts. Then the small crane is broken apart and taken down in elevator.
Q:How to select tower crane type according to the height of building? Seek explanation
The building cornice height within 20m, the building area of each floor within 2000m2 with 800KN.m tower crane 1 units, each increase of less than 1600m2 800KN.m 1 tower cranes;The building cornice height is less than 50m, the building area of each floor within 2500m2 with 1000KN.m self lifting tower crane 1 units, each increase of less than 2000m2 increased 1 1000KN.m self lifting tower crane;The building cornice height is less than 100m, the building area of each floor within 3000m2 with 1500KN.m self lifting tower crane 1 units, each increase of less than 2500m2 increased 1 1500KN.m self lifting tower crane;The building cornice height is above 100m, the building area of each floor within 3500m2 with 1 2000KN.m self lifting tower crane, each increase of less than 3000m2 increased 1 2000KN.m Jack 1 cranes;When the eaves height more than 25m below the 100m, according to each self lifting tower crane with 1 single cage construction elevator, eaves height above 100m with 2 single cage construction elevator;The podium when every floor area is too large, in accordance with the above standard auxiliary tower crane.
Q:Effects of whooping crane?
the whopoping crane is not a part of the food chain. Nothing would happen. 100 birds is not a pencil point in the data. We spend millions on this bird and it's lose would NOT be noticed by anyone. I'll bet not one person on this form has even seen one, can tell us what is food chain function is. A link to a post or wikpedia won't cut it either, I want the exact species that is in the chain both up and down and what the exact effect would be. Since no one can give a specific chapter and versus on the specifics and talk about genaerizations, IMHO, I'm correct. NOW If the question was about the loss of all Raptors in the world, there would be an upset. The Whooping crane in it's self is so small it's impact of lose is zero. I call BS on the poster that says she saw them in FL. NOT ONE SINGLE WEB site lists FL as it's home range. You could at least have gone to Wiki and gotten your facts right and answered my AP question, but you instead tried a red herring act to promote your bias. PS I've been to the AP and know all about them (clue tell us what I meant here and prove you are a player on this subject)
Q:Tower crane body standard section connection bolt screw upward or downward, why?.
A few days ago, a special training course of mechanical equipment, a safety supervision station old experts say the screw from the upward wear, stress is the same, but if the nut screw will fall off, in order to find problems. If you can't get it off the top and bottom nut, you won't find it
Q:did stephen crane win any awards?
Stephen Crane (November 1, 1871 – June 5, 1900) was an American novelist, short story writer, poet and journalist. Prolific throughout his short life, he wrote notable works in the Realist tradition as well as early examples of American Naturalism and Impressionism. He is recognized by modern critics as one of the most innovative writers of his generation.

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