Tài liệu Mechanisms and Mechanical Devices Sourcebook P13 ppt

... maximize snap-action. Over-centering toggle mechanisms, as shown in Fig. 1, are widely used in mechanical and electrical switches, latch mechanisms and mechanical overload controls. These toggles ... ψ 13 and ψ 12 . This establishes points A′ 2 , A′ 3 and A′ 4 , but here A′ 3 and A′ 4 coincide because of symmetry of A 3 and A 4 about A 0 B 0 . 4. Draw lines A 1 A′ 2 and...

Ngày tải lên: 27/01/2014, 14:20

... 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

... required. The striker mechanisms illustrated are operated by springs, cams, magnetic force, air and vacuum chambers, and centrifugal force. The drawings show only the striking mechanisms. Fig. 5 ... simplicity, and cost. Fig. 1 A bimetallic sensor is simple, compact, and precise. Contacts mounted on low-expansion struts determine slow make- and- break action. A shell contracts or...

Ngày tải lên: 27/01/2014, 14:20

... capability and verifying commercial demand. Initially ADI built these devices by interleaving, com- bining, and customizing its internal manufacturing processes to produce the micromechanical devices ... elements and icons, and 2D drafting and detailing capability, which support design collaboration and compatibility among CAD, CAM, and computer-aided engineer- ing (CAE) app...

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-...

Ngày tải lên: 23/01/2014, 05:20

... 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...

Ngày tải lên: 23/01/2014, 05:20

... 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...

Ngày tải lên: 27/01/2014, 14:20