Pirsgirêkan Eaton Gears nifşek & şikandî

alîyên Gears

Snubbing and clashing gears while shifting are frequent abuses to which unsynchronized transmissions are subjected. Light snubbing will do little damage. The real damage is done by the hard clash shift caused by engaging gears which are far out of synchronization. This can break pieces of metal from the ends of the clutching teeth. Clashing gears can be traced to one of three causes:

snubbed clutching gear teeth

Xeyidî û Teeth Clutching Gear

1. GUHERTINA de vediqetîne

This applies to drivers who are not familiar with the shift pattern or have not learned the RPM spread between shifts.

2. Destik

Clashing when starting up in first or reverse gear can be caused by insufficient clutch clearance or a dragging clutch not releasing properly. This makes the transmission countershafts and mainshaft gears continue rotating while the clutch pedal is depressed. Clashing results when the nonrotating sliding clutch is forced to mesh with a rotating mainshaft gear. Double clutching during lever shifts will also reduce snubbing and clashing.

3. Hêzên Inertial

Countershafts û sîtemkariya mainshaft bi piranî ji bigirin 3 ber 5 seconds ji bo rawestandina dorê de piştî bi qîrînê hatiye disengaged dîtin. Pêngava ji wire a gear zilamê bi gear mainshaft berî gear mainshaft di hilbijartinê de li pevçûna di encama wê. Eger Veguhestina ku bi şikand qîrînê an şikand countershaft bixemilîne, wê pêwîst e ji bo hanî çend seconds piştî bihayan li pedal bi qîrînê berî engagement destpêkê yên veguhestina di.

Marks manufacturing

Sometimes gears are replaced or thought to be defective because of marks left on the gear by manufacturing processes. Ev vedixwin, lebê, do not contribute to gear failure and the gear should not be replaced because of these marks.

Hob Marks

hob marks

These are cutting marks or lines formed during the initial cutting of the gear teeth. Hob marks on the tooth face will be removed by the shaving process, but hob marks in the root of the tooth will most likely remain, and may be found even on gears with much wear on them.

Marks Derma

shaving marks on gear

The shaving operation leaves distinct diagonal marks on the face of the gear tooth. These marks can be distinguished from scoring marks by the fact they are diagonal, while scoring marks are more nearly vertical. Most shaving marks are removed during normal gear operation.

Gear Lipping

Gear Lipping

Lipping an melhema burrs, is the formation of “lips” at the tip of the gear teeth machining. Ev "lêvên" dê tu ziyan ji gear bikim.

Rattle Gear li Idle

Mainshaft gears are designed to have a specified amount of axial clearance which allows them to rotate freely on the mainshaft. The amount of clearance is governed by the use of washers. A engine idling asê dikarin set up vibrations, causing the mainshaft gears to rattle as they strike mating gears. This condition can usually be cured by improving the idling characteristics of the engine. Tolerance washers may have to be changed to bring the axial gear clearance to within tolerance on high mileage units. See the service manual for procedure and specifications.

Twist Shaft û Fracture

Failure of transmission shafts through fracturing or twisting is caused when stresses are imposed on them which are greater than they were designed to withstand. The main causes for these failures are:

  1. teknîkên clutching de vediqetîne.
  2. Dest li pir bilind ji gear.
  3. Lugging.
  4. Hewl dide ku bi brakes girtin [Girtî] dest pê.
  5. Transmission used for application it was not designed to withstand.
  6. Bumping nav qefesa dema piştgirîya.
  7. anî de vediqetîne ji wheel 5'emîn adjustable.
fractured mainshaft

bistêrk Mainshaft
Wekî ku bi diranên gear, shafts may fracture as a result of fatigue or impact.

twisted mainshaft

Twisted Mainshaft
Loads not severe enough to cause shaft fractures may cause the shaft to twist.

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