TAILIEUCHUNG - McGraw-Hill - Robot Mechanisms and Mechanical Devices Illustrated - 2003 Part 9

Tham khảo tài liệu 'mcgraw-hill - robot mechanisms and mechanical devices illustrated - 2003 part 9', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 164 Chapter 5 Tracked Vehicle Suspensions and Drivetrains tiable crevasse width but these add complexity to the wheeled vehicle s inherent simplicity. Tracks however have the ability to cross crevasses built in to their design. Add a mechanism for shifting the center of gravity and a tracked vehicle can cross crevasses that are wider than half the length of the vehicle. Most types have many more moving parts than a wheeled layout all of which tend to increase rolling friction but a well-designed track can actually be more efficient than a wheeled vehicle on very soft surfaces. The greater number of moving parts also increase complexity and one of the major problems of track design is preventing the track from being thrown off the suspension system. Loosing a track stops the vehicle completely. Track systems are made up of track drive sprocket idler tension wheel suspension system and sometimes support rollers. There are several variations of the track system each with its own set of both mobility and robustness pros and cons. The design of the track itself steel links with hinges continuous rubber tread shapes Method of keeping the tracks on the vehicle pin-in-hole guide knives V-groove Suspension system that supports the track on the ground sprung and unsprung road wheels fixed guides Shape of the one end or both ends of the track system round or ramped Relative size of the idler and or drive sprocket Variations of most of these system layouts have already been tried some with great success others with apparently no improvements in mobility. There are also many varieties of track layouts and layouts with different numbers of tracks. These various layouts have certain advantages and disadvantages over each other. One track with a separate method for steering The basic two track side-by-side Two tracks and a separate method for steering Two track fore-and-aft Several designs that use four tracks Chapter 5 Tracked Vehicle Suspensions and Drivetrains 165 A six-tracked

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