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A rack and pinion is a type of linear actuator that comprises a circular gear (the pinion) engaging a linear gear (the rack ). Together, they convert between rotational motion and linear motion. Rotating the pinion causes the rack to be driven in a line. Conversely, moving the rack linearly will cause the pinion to rotate.
A rack railway (also rack-and-pinion railway, cog railway, or cogwheel railway) is a steep grade railway with a toothed rack rail, usually between the running rails. The trains are fitted with one or more cog wheels or pinions that mesh with this rack rail.
Rack and pinion unit mounted in the cockpit of an Ariel Atom sports car chassis, atypical of contemporary production automobiles Non-assisted steering box of a motor vehicle. Many modern cars have a steering mechanism called a rack and pinion. The steering wheel turns a pinion gear, which moves a rack back and forth to steer the wheels.
Pinion and annular gear A pinion is a round gear —usually the smaller of two meshed gears—used in several applications, including drivetrain and rack and pinion systems. Applications [ edit ]
Helical rack. A helical rack has a planar pitch surface and teeth that are oblique to the direction of motion. Helix angle. Helix angle is the angle between the helical tooth face and an equivalent spur tooth face. For the same lead, the helix angle is greater for larger gear diameters. It is understood to be measured at the standard pitch ...
A rack is a toothed bar or rod that can be thought of as a sector gear with an infinitely large radius of curvature. Torque can be converted to linear force by meshing a rack with a round gear called a pinion: the pinion turns, while the rack moves in a straight line.
Ackermann geometry. The Ackermann steering geometry is a geometric arrangement of linkages in the steering of a car or other vehicle designed to solve the problem of wheels on the inside and outside of a turn needing to trace out circles of different radii . It was invented by the German carriage builder Georg Lankensperger in Munich in 1816 ...
The Mount Washington Cog Railway, also known as the Cog, is the world's first mountain-climbing cog railway (rack-and-pinion railway). The railway climbs Mount Washington in New Hampshire, United States. It uses a Marsh rack system and both steam and biodiesel -powered locomotives to carry tourists to the top of the mountain.
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