عیب یابی جعبه دنده ایتون & شفت

کلاشینگ چرخ دنده

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

رد دندان محکم دنده

1. جا به جایی مشغله نامناسب

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

2. کلاچ

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. نیروی اینرسی

Countershafts و چرخ دنده ها mainshaft معمولا از را 3 به 5 ثانیه برای متوقف کردن چرخش پس از کلاچ رها شده است. تلاش برای مش یک چرخ دنده کلاچ با یک چرخ دنده قبل از mainshaft دنده mainshaft متوقف می شود در برخورد خواهد شد. اگر انتقال با ترمز کلاچ و ترمز countershaft مجهز نیست, لازم است به مکث چند ثانیه پس از افسرده پدال کلاچ قبل از اقدام تعامل اولیه از انتقال.

مارکس ساخت

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

حب مارکس

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.

مارکس تراشیدن

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.

دنده Lipping

دنده Lipping

Lipping یا اصلاح پلیسه, is the formation of “lips” at the tip of the gear teeth machining. این "لب" هیچ آسیبی به چرخ دنده انجام.

راتل دنده در دور آرام

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. موتور دور آرام خشن می توانید راه اندازی ارتعاشات, 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.

پیچ و تاب و شکستگی شفت

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. تکنیک های چنگ نامناسب.
  2. شروع در بیش از حد بالا از چرخ دنده ها.
  3. Lugging.
  4. تلاش برای ترمز قفل شده شروع.
  5. Transmission used for application it was not designed to withstand.
  6. تداوم به حوض هنگام پشتیبان گیری.
  7. نصب نادرست از چرخ 5 قابل تنظیم.
fractured mainshaft

شکسته Mainshaft
همانطور که با دندانه های چرخدنده, shafts may fracture as a result of fatigue or impact.

twisted mainshaft

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

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