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problem action cart

  • Thread starter Thread starter infallibile_GF
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infallibile_GF

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Hello, everyone.
I would like to ask you a question, which has actually been resolved a few years ago, so it is a pure mental exercise we say... I will tell you what solution has been adopted.
we have, a cart that moves along a guide, of those guides machined. moves on nukre-type wheels and straight motion is carried out through a knit chain. the distance you must travel is about 15 meters, then arrived at the end, must go back. the cart is mounted parallel to a production line, in practice the cart has to follow the piece on the production line for 15 meters, then it has to bully inidetro motlo quickly and "to hang" another piece and follow it for the usual 15 meters.
the problem that has been found is the follower: when the cart advances accompanies the piece on the line, it has to move slowly, we say like a man who walks very leniently. once it has come to the end, it has to go back as quickly as possible, because it has to intercept the second piece, without slowing down too much the production line. the cart is trascianto from a chain moved by a gear motor that remains fixed to a supoporto and at the end of the race there is a simple reference to toothed wheel, also fixed. while the two heads of the chain are hooked to the cart. the problem is in the gear motor that, of course, must be invertered, because it is necessary to adjust the speed "low" of advancement, because it has to adapt to the movement of the production line and both because then it turns back quickly. therefore the inverter is obligatory. the driver's supplier told us that the speed difference between the trip and the return was too big and that causes problems to the inventer and electric motor of the reducer: a very normal mat was essentially reacting when it slowed to burn, because the fan of the electric motor did not turn too fast and also the inventer could not guarantee such a high renge of different vleocity.
How to solve the question here? with the argument that the salution must be as simple and economic as possible, without excessive complications?
now my iedea that had come to me was to mount two gear motors on the two toothed pinions of the chain, of which an inverter for the slow and adjustable grip of the cart and one without inveter for the fast return. the return of the cart does not need a varable speed. and how do you mount two gearboxes on the chain? simple: I thought to mount the pinions on free snap bearings, but mounting one against the other. so when the forward motor was working by dragging the chain, the other gearbox was put in crowds by the free snap wheel and obviously vice versa. I only thought of this solution, but it was not actually realized.
how would you have solved the problem?
 
First, I would contact a serious manufacturer of motors and drives with inverters and not a dealer, who just wants to place what it has in stock.

I would mount a simple fan on the engine to use it from 5hz to 100/120hz to manage the two speeds.1719152593286.pngmal that go, if you need to couple low regimes, you can think of putting a size to die extra but surely lencoder in the engine, so do backing closed ring simulated.
As an alternative to all of this, put a super normal 4poli engine and a two-speed gearbox so that you can decide to do its speeds as you need.

another solution is to put two engines with two gearboxes and slip into a differential box or with two clutch triggers.

the idea of the two opposing free wheels that command the same tree would be possible but I think it is a solution that no one would propose as a reliable solution over time.

on industrial plants, they usually do solid and robust things and according to the peciottate.

What are you transporting? clean material? boxes? iron bills? Rough stuff? Are you kidding me?
 
bhe is indeed a very aggressive environment and the cart carries the extraction system of the working fumes. then the cart must follow the piece to aspire the fumes it emanates, preventing them from going around the factory. the system trolley + suction no or heavy pier, we say it is about 250 kg
 

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