Drive System Theory of Operation

The STR46SP Ride-On Power Trowel is equipped with a "Torque Converter"whichsuppliestorquetoboththeleftandrightgearboxes.

The function of the torque converter is to automatically deliver the correct amount of torque required by the trowel under all load conditions.This enables the trowel to deliver the necessary torque for float pan applications and the high rotor speeds required for burnishing concrete.

The torque converter used in the STR46 SERIES Ride-On Power Trowel is a variable pitch pulley type (Figure 22) connected by a drive belt.

Fig. 22 Torque Converter/Variable Pitch Pulley

Drive Pulley

The "Drive Pulley" uses centrifugal force (Figures 23 and 24) to create a belt squeeze force transmitted at the pulley faces. This condition functions as an automatic clutch and transmission.

 

 

TRI

 

 

 

N

FU

G

 

E

 

 

 

C

 

 

 

A

L

 

 

 

 

 

F

 

 

 

 

 

O

 

 

 

 

 

R

 

 

 

 

 

C

 

 

 

 

 

E

FIXED

FACE

VARIABLE

FACE

 

SQUEEZE

 

BELT

FORCE

DRIVE PULLEY

 

 

(TORQUE CONVERTER)

STR46SP — MAINTENANCE

Centrifugal force pushes the roller arms against the ramp plate, forcing the moveable face toward fixed face squeezing the belt. (see Figure 24 below)

CENTRIFUGAL FORCE

DISTANCE

DRIVE

LOW OUTPUT

SPEED

MOVEABLE FACE

MOVEABLE

PULLEY

 

 

IS CONTROLLED

FACE

 

 

 

 

BY A SPRING

TRAVELS

 

 

 

 

AND BELT TENSION

 

LOW ENGINE RPM

 

 

 

DRIVEN PULLEY

MOVABLE FACE IS

HIGH OUTPUT

CONTROLLED BY

DRIVE

SPEED

ROLLER WEIGHT ARMS

PULLEY

 

AND SPRINGS

HIGH ENGINE RPM

DRIVEN PULLEY

Fig. 24. Pulley Interaction

The"VariablePitchPulleys"haveonefixedface,andonemoveable face.The drive pulley ( torque converter, Figure 25) moveable face is controlled by roller weight arms and springs, which change position according to engine speed.The driven pulley moveable face is controlled by a spring and belt tension.

DRIVE PULLEY

RAMP

PLATE

BUSHING

SPRING

ROLLER ARM

WEIGHT

Fig. 25. Variable Pitch Pulley

A

B

C

DRIVE

 

 

 

PULLEY

DRIVEN

PULLEY

NEUTRAL LOW SPEED HIGH SPEED

Figure 23. Torque Converter (Centrifugal Force)

Figure 26. Pulley Conditions

 

 

STR46SP • RIDE-ON POWER TROWEL — OPERATION MANUAL — REV. #1 (08/01/06) — PAGE 32

 

 

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Stow STR46SP manual Drive System Theory of Operation, Torque Converter/Variable Pitch Pulley Drive Pulley
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STR46SP specifications

The Stow STR46SP is a premium storage solution designed for efficiency and functionality, perfect for various applications in both residential and commercial settings. With a focus on durability and ease of use, the STR46SP is an excellent addition to any home or workspace needing effective organization.

One of the standout features of the Stow STR46SP is its robust construction. Made from high-quality materials, this storage unit is designed to withstand the rigors of daily use while maintaining a sleek and modern aesthetic. The frame is constructed from heavy-duty steel, providing stability and strength, while the shelving is crafted from high-density polyethylene that is resistant to impacts, stains, and scratches.

The storage unit boasts a generous capacity, with ample space to accommodate a wide variety of items. With its multiple shelves, the STR46SP allows for efficient categorization and storage, whether you are organizing tools in a garage, files in an office, or supplies in a workshop. Its adjustable shelving system ensures that you can customize the storage dimensions to meet your specific needs, allowing for both tall and short items to be stored without inconvenience.

Another key characteristic of the Stow STR46SP is its mobility. Equipped with heavy-duty wheels, the storage unit can be easily moved from one location to another, allowing for flexible usage in any environment. This feature is particularly beneficial in settings where space is at a premium, enabling users to reposition the unit as required.

The Stow STR46SP also integrates smart design technologies, such as a lockable door mechanism. This provides added security for stored items, ensuring that valuable tools and documents are protected. The unit's ventilation design prevents moisture build-up, prolonging the life of stored materials and keeping everything fresh.

In conclusion, the Stow STR46SP is a versatile and durable storage solution ideal for anyone looking to maximize their space efficiency. With its high-quality construction, ample storage capacity, adjustable shelving, and mobility features, this unit is designed to cater to a wide range of storage needs. Whether in a home garage, office, or workshop, the STR46SP proves to be a reliable and practical investment for effective organization and convenience.
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