7 universal joint

JOINTS IN AUTOMOBILE

•UNIVERSAL JOINT•CONSTANT VELOCITY JOINT

•RZEPPA JOINT

UNIVERSAL JOINT

A universal joint, (universal coupling, U-joint or Hooke's joint) is a joint or coupling in a rigid rod that allows the rod to 'bend' in any direction, and is commonly used in shafts that transmit rotary motion.

To give drive at varying angles ( up to 20 degree)

UNIVERSAL JOINT

CONSTANT VELOCITY JOINT

Constant-velocity joints  ( CV joints) allow a drive shaft to transmit power through a variable angle, at constant rotational speed, without an appreciable increase in friction or play.

They are mainly used in front wheel drive vehicles and 4x4 drive vehicles.

The angle up to 30 degrees

CONSTANT VELOCITY JOINT

RZEPPA JOINT

RZEPPA JOINT

A Rzeppa joint consists of a spherical inner shell with 6 grooves in it and a similar enveloping outer shell.

Each groove guides one ball.

The input shaft fits in the centre of a large, steel, star-shaped "gear" that nests inside a circular cage.

The cage is spherical but with ends open, and it typically has six openings around the perimeter.

This cage and gear fit into a grooved cup that has a splined and threaded shaft attached to it.

Six large steel balls sit inside the cup grooves and fit into the cage openings, nestled in the grooves of the star gear.

RZEPPA JOINT