Linear Actuators that Keep on Rolling  

Oleh:

Kliber, Tony

Jenis: Article from Bulletin/Magazine - ilmiah internasional
Dalam koleksi: Machine Design (Soft Copy ada dalam http://search.proquest.com/) vol. 83 no. 11 (Jun. 2011), page 68-69.
Topik: Accuracy; Machinery Industry; Flexibility

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Perpustakaan Pusat (Semanggi) Nomor Panggil: MM44 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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Roller pinions come in handy for delivering high accuracy, but they also eliminate backlash because two or more rollers connect in opposition with the rack teeth at all times. The rollers approach the tooth face on a tangent path and then smoothly roll down the face. This action is much less noisy than that of ball and tooth slap associated with traditional rack-and-pinion systems. In addition, machine builders can purchase roller-pinion systems in standard segment lengths and custom cut them as needed. There is also some flexibility in the cost of these devices because roller pinions come in numerous models, each delivering different accuracies, life expectancies, maximum dynamic loads, lubrication needs, and corrosion resistance. Roller-pinion systems need less maintenance than conventional rack-and-pinion setups. A higher sectional wear rate can be seen when the motion profile is tight, as in this example. Roller-pinion systems adapt well to plasma-cutting machines, which have applications in almost every industry.

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