© Bosch Rexroth AG, RE98712

Shift on Fly SOFEfficient and comfortable shifting concept

RE98712/02.2015

The Rexroth Shift on Fly offers comfortable gear changes while moving.

Applications

Customer benefits Enhanced efficiency: High tractive force and

maximum travel speed High comfort: Quick and synchronized gear changes

without stopping Reliable and proven series components Meets functional safety requirements Compact size for limited installation space

Manufacturers of mobile working machines constantly strive to increase the efficiency and operating comfort of their vehicles. The hydrostatic travel drive has an essential influence on these aspects. The more tailored it is to the specific requirements of the users, the more material handling can be processed in the same time period. Increasing efficiency helps to reduce the operating costs of mobile working machines. Rexroth offers with the patented Shift on Fly concept a travel drive which ensures high tractive force up to the maximum speed without hesitation and with high efficiencies. In addition, it provides a high operating comfort for mobile working machines (e.g. telehandler, wheeled loader).

Function and benefits

Enhanced efficiency: High tractive force and maximum travel speedFast moving mobile working machines are often equipped with a hydrostatic travel drive and a standstill transmis-sion. The drawback is that the required tractive force and speed range must be selected before starting off. This means, it is not possible to run through the entire tractive force and speed ranges. Switching between the operating ranges is only possible manually when the vehicle has come to a complete stop.

The patented Rexroth Shift on Fly concept SOF, which was developed together with well-known gear manu-facturers, reduces this time loss and inefficiency. SOF is based on a synchronized gear shifting and enables starting off in the first gear without tractive force compromises. At the same time, the high efficiency of the hydrostatic travel drive is maintained. Switching into the second gear can be done while moving. In contrast to a standstill transmission, the desired maximum speed is achieved noticeably faster. These rapid, reversible gear changes while driving contribute significantly towards increasing the efficiency of mobile working machines.

© Bosch Rexroth AG, RE98712

Shift on Fly SOFEfficient and comfortable shifting concept

Bosch Rexroth AGMobile ApplicationsGlockeraustraße 489275 Elchingen, GermanyPhone +49 7308 82-0info.ma@boschrexroth.dewww.boschrexroth.com

© This document, as well as the data, specifications and other informationset forth in it, are the exclusive property of Bosch Rexroth AG. It may not be reproduced or given to third parties without its consent. The data specified above only serve to describe the product. No state-ments concerning a certain condition or suitability for a certain application can be derived from our information. The information given does not release the user from the obligation of own judgment and verification. It must be remembered that our products are subject to a natural process of wear and aging.Subject to change.

Axial piston variable pump A4VG series 40Sizes: 65 cm³ to 110 cm³

Nominal pressure: 450 bar

Maximum pressure: 500 bar

Data sheet: 92004

Axial piston variable motor A6VM series 71Sizes: 85 cm³ to 150 cm³

Nominal pressure: 450 bar

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Data sheet: 91610

BODAS controller RC12-10, series 30Data sheet: 95204

Technical data

The Rexroth Shift on Fly concept is especially suitable for mobile machines with an operating weight of 6 to 15 tons or an engine power of 40 to 150 kilowatts.

High comfort: Fast and synchronized gear changes without stoppingRexroth Shift on Fly concept enables rapid and synchro-nized gear changes for the driver while moving. The fully automatic switchover between the operating ranges increases both the operating and driving comfort.If necessary, the driver can also manually shift the gears without stopping.

Reliable and proven series componentsRexroth has many years of experience in the development and production of high quality drive solutions. This comprehensive expertise has been applied in the develop-ment of the Rexroth Shift on Fly concept. SOF consists of proven and perfectly harmonized standard production components (e.g. controller, hydraulic units A4VG and A6VM) and offers high reliability. All required components can be selected from an existing assembly kit and combined for the respective application purpose.

Meets functional safety requirementsThe BODAS RC12 -10 controller used by Rexroth meets the requirements of functional safety as prescribed by DIN EN ISO 13849. For example, the Rexroth BODAS controller has integrated security functions and measures to prevent unexpected vehicle movement, excessive acceleration or braking and false interpretation of the driving direction. Compact size for limited installation spaceWith the patented Shift on Fly concept, Rexroth has developed a travel drive that is economical but also compact. The compact dimensions of the components allow the installation of the Rexroth SOF in mobile working machines with limited space (e.g. telehandlers, wheeled loaders, wheeled excavators).

Axial piston motor A6VM

BODAS controller RC12-10

Axial piston pump A4VG

Telehandler with Rexroth Shift on Fly