Thông tin cơ chế - Thiết bị cơ khí P12 pdf

... typically offer continuous torque ratings of 0.62 lb-ft (0.84 N-m) to 5.0 lb-ft (6.8 N-m), peak torque ratings of 1.9 lb-ft (2.6 N-m) to 14 lb-ft (19 N-m), and continuous power ratings of 0.73 hp ... the brush-type DC servomotor with its iron-core rotor that permit more rapid acceleration and decelera- tion because of their low-inertia, lightweight cup- or disk-type armatures. The disk-type ....

Ngày tải lên: 04/07/2014, 07:20

... begin the cutting action. CUTTING MECHANISMS These 3 four-bar cutters provide a stable, strong, cutting action by coupling two sets of links to chain four-bar arrangements. The cutting edges of ... The unit’s cut-and-stacked label capacity is 4,500. An electric eye is provided for cutting labels in web-roll form. The flow of containers through this labeler is shown by the top-view drawing ......

Ngày tải lên: 04/07/2014, 07:20

... causes its link to oscil- late. A second connecting link then con- verts that oscillation into the desired in- line output motion. ROTARY-TO-RECIPROCATING DEVICES Sclater Chapter 4 5/3/01 10:45 ... the cam shaft. The cam shaft car- ries the second cam and the 80-tooth gear. The 3 0- and 100-tooth gears are integral, while the 20-tooth gear is attached to the one-cycle drive shaft. One of t...

Ngày tải lên: 04/07/2014, 07:20

... job because it cannot predict the exis- tence of such mechanisms as the Bennett R-R-R-R mechanism, the double-ball joint R-S-S-R mechanism, and the R-C- C-R mechanism (Fig. 2). These “special” mechanisms ... a single degree-of-freedom mechanism, will have a passive degree of freedom of its coupler link. When properly con- structed, the configuration R-C-C-R will also have a passive degree-...

Ngày tải lên: 04/07/2014, 07:20

... is rotating. Air springs with one, two, or three convolutions can be used. A standard rotat- ing-air fitting is required. Reciprocating linear force link: It recipro- cates with one-, two-, or ... flex- ure width in each plane is the same. 184 The Apollo telescope-mount cluster (top left) had flexures for tilting an X-ray tele- scope. The platform (top right) is tilted with- out break-away .....

Ngày tải lên: 04/07/2014, 07:20

... A quick-acting dwell cams. Fig. 3 An adjustable- dwell cam. Fig. 1 A quick-acting floating cam. Fig. 5 A double-revolution cam. Fig. 6 An increased-stroke barrel cam. Fig. 7 An increased-stroke ... dif- ferent timing schemes. • Accurate rotary-to-linear motion con- version (Fig. 3H). • Driving two counter-rotating outputs from a single input, using just a sin- gle belt (Fig. 3I). • Rotary-to-...

Ngày tải lên: 04/07/2014, 07:20

... cas- sette audio-visual tape recorders. The models included record-playback and playback-only portables and decks. Fixed parameters. The Philips cas- sette concept has several fixed parame- ters—the ... the other. Then the wedge-type, two-way, over-running clutch (second figure) disengages, free- ing the wheel to spin without drag. Variations. Each clutch has three posi- tions: forward drive,...

Ngày tải lên: 04/07/2014, 07:20

... difference between magnetic-particle and mag- netic-field clutches. However, the magnetic medium in the parti- cle clutch is a dry powder; in the fluid clutch it is a powder sus- 327 pended in oil. ... at the rpm of the high-speed motor. The gear motor contin- ues to drive the inner member, but the clutch is free- wheeling. Fig. 2 Backstopping permits rotation in one direc- tion only. The clu...

Ngày tải lên: 04/07/2014, 07:20

... torque is transmitted from the bevel gear through a torque- splitting pinion to two torque-splitting gears, then from the two torque-splitting gears through the associated two bull pinions to the ... still exists, control action is contin- ued in the same direction. Thus, the con- trol process is a step-by-step response to make the correction and to stop the oper- ation of the controller. The...

Ngày tải lên: 04/07/2014, 07:20