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| Drive and Control Systems for Telescopic Handlers |
| Working Hydraulics - the Ups and Downs of Your Telescopic Handler |
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| The working hydraulics in your telescopic handler face numerous challenges – regardless of whether these are basic functions or the complex requirements of your top-of-the-range model. Rexroth is ready for all these challenges. No matter which size and type of handler, no matter what functional scope. And everything already optimized in our own telescopic handler test model, and then adapted perfectly to your prototype.
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For the working hydraulics, too, the criteria of sensitive positioning, work output, safety and ease of operation are becoming increasingly important. This means new challenges in the development of new working hydraulics systems. Alongside conventional systems – gear pump with mechanical throttle control – other increasingly user-friendly technologies with many useful additional functions are being developed: variable displacement pumps combined with sensitive, load-pressure-independent flow distribution (LUDV technology) from Rexroth enable the supply to several simultaneously actuated work functions to be matched to demand, all with minimal fuel consumption.
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From small but powerful…
The so-called open-center working hydraulics are perfect for less expensive telescopic handlers. They encompass tried-and-tested technology for economic but robust solutions. This system is based around AZP gear pumps combined with the SM12 control block. The advantages of this system are its simple layout, compact design and the ease of adding further functions later on.
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…to the top performance version…
Three central elements make up this high-convenience system: pump, valves and control. But it’s knowing how these different areas interact with each other that determines how well they perform in practice. The A10VO variable displacement pump offers a great number of control options for optimizing energy consumption – such as pressure and flow control with higher-level power regulation or electro-proportional swivel-angle adjustment. This pump is attached directly to the travel pumps or the diesel engine’s power take-offs. The SX and M6 valve systems form the basic unit of high-quality flow sharing technology for various different types of telescopic handlers. In addition to load-pressure-independent regulation of the flow, which enables more than one simultaneous working function to be supplied according to demand, it offers a range of advantages: the integrated priority control for the steering and the integrated control oil supply reduce the amount of pipework. An integrated shut-off valve ensures that the control oil supply is stopped in dangerous situations.
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…we’ve always got a grip.
The hydraulic and electronic joysticks TH and THE with ergonomic handles EC2000+ and EC4000 make everyday use of the telescopic handler easier and more effective: up to four functions at once can be proportionally controlled by one joystick. Low actuating forces and proportional control behavior permit sensitive control, while various performance curves ensure optimum matching to the working hydraulics. Lock-in positions and reference positions for identifying working points greatly simplify the driver’s work. What’s more, additional switches, slides and buttons can be incorporated in the joysticks.
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Find out more at
www.boschrexroth.com/control-blocks and www.boschrexroth.com/joysticks
Relevant links for Telescopic Handlers
Back to Drive and Control Systems for Telescopic Handlers Home Page
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