tailieunhanh - Five Hundred and Seven Mechanical Movements Episode 4

Tham khảo tài liệu 'five hundred and seven mechanical movements episode 4', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Mechanical Movements. 25 77. The vibration of the lever c on the 83. A nearly continuous rotary motion center or fulcrum A produces a rotary is given to the wheel D by two ratchetmovement of the wheel B by means of the toothed arcs c one operating on each side two pawls which act alternately. This is of the ratchet-wheel D. These arcs only almost a continuous movement one of which is shown are fast on the same rock-shaft B and have their teeth set op- 78. A modification of 77. positc ways. The rock-shaft ĨS worked by giving a reciprocating rectilinear motion to 79. Reciprocating rectilinear motion of the r d A. The arcs should have springs the rod B produces a nearly continuous applied to them so that each may be capable rotary movement of the ratchet-faced wheel rising to allow its teeth to slide over those A by the pawls attached to the extremities of the wheel in moving one way. of the vibrating radial arms c c. 84. The double rack-frame B is sus- 80. Rectilinear motion is Imparted to the pended from the rod A. Continuous rotary slotted bar A by the vibration of the lever motion Is given to the cam D. When the c through the agency of the two hooked shaft of the cam is midway between the two pawls which drop alternately into the teeth racks the cam acts upon neither of them of the slotted rack-bar A. but by raising or lowering the rod A either the lower or upper rack is brought within 8ĩ. Alternate rectilinear motion is given range of the cam and the rack-frame moved to the rack-rod B by the continuous revo- to the left or right. This movement has lutlon of the mutilated spur-gear A the been used In connection with the governor spiral spring c forcing the rod back to its of an engine the rod A being connected original position on the teeth of the gear A with the governor and the rack-frame with quitting the rack. the throttle or regulating valve. 82. On motion being given to the two I 85. Intermittent alternating rectilinear mo-treadles D a nearly continuous .

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