Pressure angle

About: Pressure angle is a research topic. Over the lifetime, 1373 publications have been published within this topic receiving 10245 citations. The topic is also known as: angle of obliquity.

Kinematic Synthesis and Analysis of the Rack and Pinion Multi-Purpose Mechanism

Abstract: The general procedure for synthesizing the rack and pinion mechanism up to seven precision conditions is developed. To illustrate the method, the mechanism has been synthesized in closed form for three precision conditions of path generation, two positions of function generation, and a velocity condition at one of the precision points. This mechanism has a number of advantages over conventional four bar mechanisms. First, since the rack is always tangent to the pinion, the transmission angle is always 90 deg minus the pressure angle of the rack. Second, with both translation and rotation of the rack occurring, multiple outputs are available. Other advantages include the generation of monotonic functions for a wide variety of motion and nonmonotonic functions for a full range of motion as well as nonlinear amplified motions. In this work the mechanism is made to satisfy a number of practical design requirements such as completely rotatable input crank and others. By including the velocity specification, the designer has considerably more control of the output motion. The method of solution developed in this work uses the complex number method of mechanism synthesis. A numerical example is included.

Study of the influence of the design parameters on the efficiency of spur gears

Abstract: The friction power losses in spur gears can be computed as the integral, along the entire path of contact, of the normal load, multiplied by the friction coefficient and the elemental sliding. Good agreement with experimental results are obtained by estimating the load from the minimum potential energy load sharing model, and the friction coefficient from the equation provided by Xu in 2005. From this approach, a complete study of the influence of the design parameters (number of teeth, gear ratio, pressure angle, addendum modification coefficients, etc.) on the mechanical efficiency is presented.

High speed geared transmission

Abstract: PURPOSE:To transmit a large power with a comparatively small bevel gear by setting a speed transmitting ratio to output shafts against an input shaft, a pressure angle between a driving bevel gear and a driven bevel gear, and an angle of torsion to be fixed values. CONSTITUTION:A speed transmitting ratio between bevel gears 6, 7 and bevel gears 16, 17, that is, a speed transmitting ratio to output shafts 10, 11 against an input shaft 2, is set to be 1.45-1/2.1. Also, an angle pressure alpha on teeth of the bevel gears 6, 7, 16, 17, an angle of torsion beta of teeth of the bevel gears 6, 7, 16, 17, and a pitch cone angle delta of the bevel gears 16, 17 are set to be within a range that is set by an equation, -0.324<=tanalpha.sindelta/cosbeta-tanbeta.cosdelta<=0.1.

Mechanical reduction gear and electrophotographic image forming apparatus

Abstract: PROBLEM TO BE SOLVED: To constitute a reduction gear train having a reduction ratio 1/10 to 1/25 by one-step speed reduction by checking up a reference rack for tooth profile production to make high image quality obtainable by being used for an image forming apparatus and most appropriately setting the respective dimensions of the reference rack. SOLUTION: The mechanical reduction gear is equipped with the reduction gear train consisting of two gears and having the reduction ratio 1/10 to 1/25 by the one-step speed. The gears of the tooth profiles produced by the reference rack 20 to enable tooth profile generation of the tooth profiles of the teeth of a pressure angle α=20°, the size of teeth ranging from 0.1 to 0.5 m (m=module), addendum of a height ranging from hf ≥1.0 m to ≤1.25 m, and tooth thickness So=0.45 pitch are used. COPYRIGHT: (C)2007,JPO&INPIT