trolley mechanism 11JXF8

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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:11JXF8

Motor Power(KW):11

Rated single rope tension (N):7100

Single-rope linear velocity(m/min):0-65

Rope capacity(m):75

Wire rope diameter(mm):9

Relevant parameter of the suitable tower crane

--Max lifting load(t):18

--Max crest(m):77

trolley mechanism 11JXF8

Q:in the title. any books that talk about the physics in a tower crane? or any crane in general? or a similar machine to a crane?: Hi, Well, this is an interesting topic about physics and requires to have a basic knowledge, correct? So here we have some books: - Chopra, K. A. Dynamics of Structures: theory and applications to earthquake engineering. - Bostelman, R., et al. “Toward Next-generation Construction Machine,” Proceeding of American Nuclear Society 9th International Topical Meeting on Robotics and Remote Systems. - Gore, Bryson. Trucks, Tractors, And Cranes. - Grote Antonsson, editors. Handbook of Mechanical Engineering. - Seidel, Michael. Tensile Surface Structures. B-) FL ------------- You cannot teach a man anything; you can only help him discover it in himself.” (Galileo Galilei)

Q:Who do you think was better and who would've won if they faced.: willie with out a doubt

Q:I'll be graduating from a Korean language extra school in 1,5 years, and one of the teachers there is really amazing. Essentially, she has taught me the most compared to any other teacher there.Would giving her a 1000 cranes (and a bouquet maybe?) an appropriate and good 'thank you and goodbye' gift? Is it too little? Or overkill? She really means a lot so I want to give something!: I think that gift would be perfect for a teacher! If I was a teacher and a student gave that to me i'd cry. Have you heard about that book of the 1000 paper cranes? (Can't remember the name) but it says if you make a 1000 paper cranes then you get a wish. Well anyways make sure you present the presents nicely. Like put the cranes in a pretty jar with a beautiful ribbon wrapped around it and get flowers that're her favorite colors.

Q:They're so big: Very Carefully !!

Q:I'm 17 and I was planning on reading it for class, do you think it will be easy to read?: Stephen Crane, Maggie is fantastic! I read it in school when I was 14 so I have no doubt you will have no problems in reading it. Maggie is the tale of an inevitable fall from grace on the part of a young, innocent girl trapped in the vicious world of New York City's slums. Yearning for acceptance and love, beaten at home by alcoholic parents, Maggie sets out with Pete, a local bartender whose cultured mannerisms elicit great respect from the impressionable young girl. However, when Pete spurns her for another, Maggie is ejected out onto the street, forced into prostitution to make a living. We last see her moving off, a huge, oily fat man in tow, for a darkened corner in the city's seedy underworld. If Upton Sinclair's The Jungle is a torrent of social anger and protest, Crane's Maggie is like a brilliant lightning strike, flashing across our vision and leaving us temporarily blinded. The book--scarcely 70 pages--is succint, brutish, and merciless. Crane allows his readers to form their own opinions regarding the characters. His innovative use of near-phonetic spelling to depict in the reader's ear the local dialect of New York's rough neighborhoods was shocking and difficult to comprehend when the book was first released. It lends Maggie an air of earthy legitimacy. Ultimately, Maggie is a cry for the plight of poor children--the souls we overlook with a callous unease mirrored in Pete's offhand, uncaring rejection of young Maggie's genuine love and affection. It is, without qualification, Stephen Crane's greatest and most moving achievement.

Q:i need to know:how long is the stock (extended and non-extended)how wide is the stockand how thick is the stockthanks.: I believe it is pretty difficult to tell and searching the schematics of the crane stock will be as well. Best way is to check out your local gun range and the folks there that shoot guns with crane stocks installed. Also, though I am not too sure about this one, check if the crane stock is compatible for mil-spec buffer tubes and commercial spec buffer tubes. Otherwise, I am very much inaccurate in any of this response.

Q:I understand the Crane stances and know there are more than one. I am referring to the single leg crane stance. I also know that stances are only used briefly. But I am curious, does this stance have any bunkai applications? Or is it only useful against dodging a kick or preparing to kick?: I use it for evading/stepping away from an attack, against a front leg sweep, you shift your weight to the other leg and pull up the front leg, blocking/checking a kick, striking with the knee, breaking down a foundation on the downward motion, hooking/trapping opponents leg on the upward motion especially if you hook your own foot around your leg you are standing on, sweeping,.... just a few applications that come to mind off the tippy top of my head. So you see it is by no means just a defensive stance and can be quite offensive too.

Q:In stephen Crane's The Open Boat does the correspondent change from the beginning of the story to the end?: Wow. I haven't read this in years but I loved this shortstory. Yes, the narrator (or corespondent) definitely changes and the nature of this change is made explicit in the closing passages of the story where, if I recall correctly, he says that he feels as if he has become an interpreter of nature.

Q:feminists always point to sexism. but Ive found 3 women here - who say they have experienced no sexism, and were pleasantly surprised by how excepting their largely male co-workers have been -: Have you failed at something? A physical for a job? Have you failed a civil engineering exam? Why take the blame yourself. Scream sexism By the way most crane operators don't pee out of the crane. Most urinate into a bag of gelatin that can be disposed of later. There is a special cuff for females to use with the bag

Q:The mobile crane has a weight of 116kip and center of gravity at G1; the boom has a weight of 29kip and center of gravity at G2. Determine the smallest angle of tilt θ of the boom, without causing the crane to overturn if the suspended load is W = 38kip . Neglect the thickness of the tracks at A and B. Determine the smallest angle of tilt θ of the boom, without causing the crane to overturn.: The key here is to simplify this as much as possible The equation is really: mass 1 x length 1 + mass 2 x length 2 = mass 3 x length 3 G1 * 6 ft = (G2 * X ft) + H3 * X ft) G1 = 116 kip G2 = 29 kip H3 = 38 kip Now it is an equilibrium of torque about the point where the boom pivots: 116 kip * 6 ft = 29 kip * Xft + 38 kip * Xft solve for X feet: X feet = 10.388 ft So the crane is in equilibrium when the load is length1 + length 2 times the mass = mass of motor * length 3 (10.388 ft * 29 kip) + (10.388 ft * 38 kip) = 116 kip * 6 ft The boom forms a triangle with the hypotenuse equals 12ft + 15 ft = 27 ft. The bottom of the triangle is 10.388 ft + 10.388 ft = 20.776ft So we have two sides of the triangle and now just need to find the angle where the triangle forms with those two sides: cosine of angle = adjacent side / hypotenuse cosine of angle = 20.766 / 27 = 0.7691 and the arc cosine of that = 39.7 degrees So rounding it off, angle of crane = 40 degree

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