The Elements of Machine Design
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In our eReader you can find the full English version of the book. Read The Elements of Machine Design Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book The Elements of Machine Design
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The arcs of contact during ap- proach and recess are found by laying off ^j /, and/ a^, on the base circles, and finding the corresponding pitch circle arcs.
If the arc of action is too large the teeth may be shortened.
205. Approximate method of describing the involute. — The involute is not difficult to describe, but the following method gives a very accurate circular approximation. Let e\ e^ (fig.
221) be the working height of the teeth, or the distance between circles Ci b^, in fig. 219, me...asured along the line of centres. Take ^1 ^ = §^1 e^. Draw a tangent ^^ to the base circle. Take hk-=^\hg. Then, a circle m «, struck Digitized by Google 31 8 Maclune Design from k with radius kg^ will be the required approximation to the involute. It will coincide with the involute at n and gy and will have the same normal at g. The part of the tooth Fig, 22 X below the base circle may be radial. This part does not come in contact with a tooth of the other wheel.
2o6. To determine the length of involute teeth for given arcs of approach and recess.
What to read after The Elements of Machine Design?
You can find similar books in the "Read Also" column, or choose other free books by William Cawthorne Unwin to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
The arcs of contact during ap- proach and recess are found by laying off ^j /, and/ a^, on the base circles, and finding the corresponding pitch circle arcs.
If the arc of action is too large the teeth may be shortened.
205. Approximate method of describing the involute. — The involute is not difficult to describe, but the following method gives a very accurate circular approximation. Let e\ e^ (fig.
221) be the working height of the teeth, or the distance between circles Ci b^, in fig. 219, me...asured along the line of centres. Take ^1 ^ = §^1 e^. Draw a tangent ^^ to the base circle. Take hk-=^\hg. Then, a circle m «, struck Digitized by Google 31 8 Maclune Design from k with radius kg^ will be the required approximation to the involute. It will coincide with the involute at n and gy and will have the same normal at g. The part of the tooth Fig, 22 X below the base circle may be radial. This part does not come in contact with a tooth of the other wheel.
2o6. To determine the length of involute teeth for given arcs of approach and recess.
What to read after The Elements of Machine Design?
You can find similar books in the "Read Also" column, or choose other free books by William Cawthorne Unwin to read onlineMoreLess
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