摘要:
A plunger pump suitable for an apparatus for injecting liquid under high pressure through a plurality of nozzles (104) into the turf. A plunger (34) of the pump is connected through a connecting rod (39) to a crank shaft (12) for the reciprocation thereof, and the crank shaft is more quickly rotated through its angle of rotation at the discharge stroke than through the angle of rotation at the suction stroke of the plunger to increase discharge pressure of the liquid upon its intermittent injection.
摘要:
A hardgeared infinitely variable transmission (IVT) is provided in which at least one quick return mechanism is hardgeared to the rotating transmission input shaft. The quick return mechanisms convert the rotating motion of the transmission input shaft to a variable motion consisting of a near constant linear velocity portion and a rapid return portion for each cycle of input rotation. The near constant linear velocity portion of the motion of each quick return mechanism is selectively engaged to a conversion device which translates the motion to an output rotation. The input/output speed ratio is adjusted by varying the amount and direction of quick return mechanism motion which is selectively engaged to the conversion device. An infinite range of speed ratios can be produced, as well as output rotation in both forward and reverse directions relative to the input rotation.
摘要:
A rotary piston engine (20) is shown which includes a housing (22) having a cylindrical working chamber with inlet (56) and exhaust (54) ports. First and second piston assemblies (30 and 32) each of which includes at least one pair of diametrically opposed pistons (30A and 30B, and 32A and 32B) are located in the working chamber. Backstopping clutches (44 and 46) limit rotation of the piston assemblies (30 and 32) to one direction (42). Piston assemblies (30 and 32) are connected to the engine output shaft through a differential (78) and non-circular gear sets (74 and 76), each of which gear sets includes a tear-drop shaped gear (74A and 76A) and heart shaped gear (74B and 76B). When the cusp of the tear-drop shaped gear engages the recess in the heart shaped gear, the tear-drop shaped gear is prevented from rotating. The piston assemblies rotate intermittently whereby pistons of the stopped assembly are trailing pistons during portions of the power and intake phases of engine operation. In one embodiment, the tear-drop shaped gear include teeth in the form of rollers (132).
摘要:
An elliptic gear having a constant velocity portion, wherein a pitch circle is a closed curve composed of: a constant velocity portion pitch curve, in which the radius from the center of rotation is a constant arc; and an inconstant velocity portion pitch curve, which is expressed by a formula of an ellipse in polar coordinates having its pole located at the center of rotation and which merges smoothly into the constant velocity portion pitch curve.
摘要:
A timing mechanism controls various functions of an ice maker through cams carried on a camshaft. A harvest rake that removes ice from a receptacle is coupled to the camshaft to be rotated thereby. The camshaft is driven by a motor which is coupled to the timing mechanism through a pair of non-circular meshing gears. The gears are programmed such that a slower speed is imparted to the camshaft when ice is being removed from the receptacle by the harvest rake. This provides a slower speed but higher torque to the harvest rake during ice removal and a faster, more accurate timing rate during filling of the receptacle.
摘要:
An intermittent drive mechanism includes a pair of non-circular drive and driven gears for translating a constant velocity rotary motion of an input shaft into a non-uniform velocity rotary motion of an intermediate shaft, the latter-mentioned rotary motion having a sinusoidal angular speed pattern, and a harmonic speed reducer drivingly connecting the intermediate shaft to an output shaft which is connected to a flexible spline of the speed reduce. A rigid circular spline of the speed reducer is angularly reciprocated under the control of an eccentric cam on the input shaft in such a manner that the motion of the sinusoidal angular speed pattern is transmitted from the intermediate shaft to the output shaft in a certain decelerated condition only while the intermediate shaft turns through a half of each turn. The motion transmission takes place gently without causing undesired shock at the beginning and the end of the motion.
摘要:
A gear transmission employing at least one pair of non-circular gears to form the intermeshing pitch curves so that one non-circular gear can be given the periodically variable number of rotations on the basis of the exponentially functional increasing mode or the same decreasing mode with respect to the rotational speed of the other non-circular gear, thereby obtaining a gear type continuously variable transmission.
摘要:
An apparatus grinding a steel billet to remove surface cracks. The billet is advanced in the direction of it longitudinal axis while being rotated. The apparatus includes a grinding wheel mounted in a bearing in a movably mounted support member. In order to accurately and simply control the penetration depth of the grinding wheel, a stop member is mounted on the support member. In one embodiment, the stop member is a segment of a circle mounted eccentrically relative to the grinding wheel. In another embodiment, the stop member is a segment of a spiral mounted coaxially with the grinding wheel. The stop member engages the surface of the billet. Two arrangements are described for rotating the billet at an increased speed while grinding the edge regions.
摘要:
A differential for motor vehicles and the like effectively providing smooth power transmission from an input drive shaft driving two gears fixed axially spaced thereon driving with pin-like teeth, on side faces thereof, a driven gear having peripheral teeth oval in cross section and coaxial with two output bevel sun gears disposed opposed and having respective power output shafts for differential driving of the motor vehicle left and right wheels during turns. The output sun gears are disposed concentric with the driven gear with a common axis of rotation normal to the axis of rotation of the drive gears. The sun gears are driven differentially during vehicle turns by two bevel planetary gears each having as axis of rotation fixed in the driven gear and extending radially toward the axis of rotation common with the sun gears and symmetrical to the axis of rotation thereof.
摘要:
An improved-efficiency, pedal-operated drive mechanism for a bicycle employing an elliptical sprocket used in association with a planetary-type gear drive for providing an elliptical path of travel of the bicycle pedals. The gear arrangement is disposed in a circular frame mounted from the conventional bicycle frame having secured therein, in a stationary position, an internally-toothed ring gear. The planetary-type drive also includes a pair of rotatable pinion gears diametrically meshed with the ring gear and supported in a bearing housing within the frame on respective pedal axles which are each secured to a pedal arm. The motion of the pedals is along an elliptical locus as the pinion gears individually but synchronously rotate in the fixed ring gear. The sprocket which is preferably of elliptical shape is secured to the housing and rotates therewith driving the bicycle with an improved efficiency on the order of 25 percent or more in comparison to the conventional circular drive system.