Tài liệu Mechanisms and Mechanical Devices Sourcebook P7 doc

... rotating handwheel with a differential screw moves nuts A and B together, and links I and II are brought into toggle. Fig. 13 A riveting machine with a reciprocating piston produces a high mechanical ... maximum value when links II and III come into toggle. Sclater Chapter 7 5/3/01 12:33 PM Page 212 213 SIXTEEN LATCH, TOGGLE, AND TRIGGER DEVICES Diagrams of basic latching and...

Ngày tải lên: 27/01/2014, 14:20

... positioning antenna reflectors, opening and closing security gates, handling materials, and raising and lowering scissors-type lift tables, machine hoods, and light-duty jib crane arms. Other linear ... by various mechanical devices. One of these is the use of internal lands or ball bearings and slots or races that convert a pull-in stroke to rotary or twisting motion. Motion con...

Ngày tải lên: 23/01/2014, 05:20

... front and back labels. Sclater Chapter 3 5/3/01 10:21 AM Page 75 Viscous liquid adhesives are used to glue fab- rics and paper, apply paper labels, make card- board and wooden boxes and shoes, and ... side arms grasp and move packages. Sclater Chapter 3 5/3/01 10:20 AM Page 72 73 TRAVERSING MECHANISMS FOR WINDING MACHINES The seven mechanisms shown are parts of different yarn-...

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... near standstill. In the disengaged position, the angu- lar velocity ratio between the output and input shafts (the “gear” ratio) is entirely dependent upon the design angles α and β and independent ... Page 111 CHAPTER 4 RECIPROCATING AND GENERAL-PURPOSE MECHANISMS Sclater Chapter 4 5/3/01 10:44 AM Page 93 Cycloidal motion is popular for mechanisms in feeders and automatic mac...

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... ARRANGEMENTS Differential, duplex, and other types of screws can provide slow and fast feeds, minute adjustments, and strong clamping action. Rapid and slow feed. With left- and right-hand threads, slide motion ... rotation, and that there be a zero gap between sec- tor and saddle nut. Pivots with a Twist A multipin flexure-type pivot, developed by Smiths Industries in England...

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... or gasoline engines, larger diesel engines, and small steam turbines. 365 Sclater Chapter 10 5/3/01 1:08 PM Page 365 366 SPEED CONTROL DEVICES FOR MECHANISMS Friction devices, actuated by centrifugal force, ... preparation in a coil that is sound and slip-free. An automatic, constant- 350 Speed and Tension Control (continued ) Fig 4 Floating rolls are direct indicators of speed an...

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... left-handed threads, • An eye on a shank with external right- handed threads, and • A flanged collar with left-handed external threads to mate with the shank of the first- mentioned eye, and right-handed ... Chapter 12 5/3/01 1:25 PM Page 415 416 DETENTS FOR STOPPING MECHANICAL MOVEMENTS Some of the more robust and practical devices for stopping mechanical movements are illustrat...

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... place and remove parts from annealing furnaces and punch presses, and they assemble and test electrical and mechanical products. Benchtop robots pick and place electronic components on circuit boards ... tools, and axes J5 and J6 have precision gear drives. All process and application cables are routed through the arm, and there are brakes on all axes. S-900 i robots sup...

Ngày tải lên: 23/01/2014, 05:20

... bi-directional slip and independent torque capacities for the two directions of rotation. It requires two springs, one right-handed and one left-handed, for coupling the input, intermediate and output ... faster. Edges of the clutch bands carry the entire load, and there is also a compound action of one band upon another. As the torque builds up, each band pushes down on the band bene...

Ngày tải lên: 27/01/2014, 14:20