When should I use planetary gears?
Generally, planetary gears are used as speed reducers. They are used to slow down motors and increase the torque. Torque is the working power of the machine. But we’ve seen our planetary gears turned around to be used as speed increasers, too.
Why do automatic transmissions use planetary gears?
An automatic transmission usually has more than one planetary gear set. They work together to create multiple gear ratios. Because the gears are in constant mesh in a planetary gear system, gear changes are made without engaging or disengaging gears, like you do on a manual transmission.
What does backlash mean?
1a : a sudden violent backward movement or reaction. b : the play between adjacent movable parts (as in a series of gears) also : the jar caused by this when the parts are put into action.
What is the backlash error?
Backlash error is the error in the motion which occurs while changing the direction of gears. It is caused when there is a gap between the trailing face of the driving tooth and the leading face of the tooth behind the driven gear. This can be avoided by turning the gear in the same direction.
What is the backlash error how do you reduce it?
Backlash error can be minimized by turning the screw in one direction only when fine adjustment is done.
Why is backlash necessary?
The general purpose of backlash is to prevent gears from jamming due to contact occurring on both sides of the tooth at the same time. A minimal amount of backlash is important in order to allow a space for lubricant to enter the mesh and also allows for any thermal expansion of the gearing under load.
What is normal backlash?
(2) Normal Backlash ( j n ) The minimum distance between each meshed tooth flank in a pair of gears, when it is set so the tooth surfaces are in contact.
How do I increase my ring gear backlash?
If using shims: Adding shims on the ring-gear’s smooth side of the carrier moves the ring-gear closer to the pinion, causing the teeth to mesh tighter, decreasing the amount the backlash. Adding shims on the other side moves the ring-gear teeth away from the pinion, increasing backlash.
What happens if pinion depth is wrong?
Again, you’ll need to determine the proper spacing by using a pinion depth setting tool to ensure proper installation. Improper gear spacing will lead to wear and damage to your gear set. If this setting is not correct, it may cause overheating or damage to the gears.
What do the numbers on a pinion gear mean?
The identifying numbers (3) for the ring and pinion gear are etched into the each gear. A plus (+) number, minus (–) number or zero (0) is etched into the face of the pinion gear (2). This number is the amount (in thousandths of an inch) the depth varies from the standard depth setting of a pinion etched with a (0).
Does crush sleeve affect pinion depth?
Re: Pinion depth/crush sleeve question Changing the pinion seal will in no way change the pinion depth. Pinion bearing preload is set by tightening the pinion nut until you crush the crush spacer enough to load the bearings.
How do you set pinion depth?
Pinion Depth – The distance from the face of the pinion gear to the centerline of the ring gear. This is adjusted by adding or subtracting shims to the inner pinion bearing.