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.

Manufacturing method for worm wheel and worm reduction gear

Abstract: PROBLEM TO BE SOLVED: To high-dimensionally achieve both securement of durability of the tooth 8a of a worm wheel 5a and reduced machining margin (cost reduction). SOLUTION: The pressure angle θ 1 of each tooth of a helical gear 13 formed in the peripheral surface of intermediate raw material 12a is set smaller than the pressure angle θ 2 of each tooth 8a of the worm wheel 5a after completion. As a result, even if the thickness of the tooth is increased, a root circle diameter size remains the same (depth of a bottom groove remains the same). COPYRIGHT: (C)2009,JPO&INPIT

Effect of Adjacent Teeth Load on Bending Strength of High Contact Ratio Asymmetrical Spur Gear Drive

Abstract: This paper describes methodology for predicting the bending stress of the spur gear accurately by including the load on the adjacent teeth for high contact ratio asymmetric spur gear drive. Higher contact ratio is obtained by enlarging the addendum from the standard addendum value where as the asymmetric is achieved by keeping various pressure angles (170, 200 and 220) at non drive side while the drive side pressure angle was kept as 200. The bending stress developed for the given load according to the load sharing calculated by using stiffness based method along with the effect of adjacent teeth loads are explored in this work. Computer aided design tool is used for generating the gear tooth profile and ANSYS is used to carry out the finite element analysis. The result shows that the maximum bending stress level in a mesh cycle is increased when the load on adjacent teeth are taken into account. The higher pressure angle at the non-drive side yields lesser stress at the fillet region when compared to the lower pressure angle.

Flat die for form rolling

Abstract: PROBLEM TO BE SOLVED: To provide a flat die for form rolling capable of rolling a screw and a worm that can suppress a bend of the material to be processed as little as possible by improving processing accuracy of the material to be processed. SOLUTION: The flat die for form rolling is provided with a biting section I, a semi-finishing section II and a finishing section III and the tooth profile a of the biting section I is composed of the two sections of the root of tooth and the tooth blank 11 near the tooth bottom and the tooth top and the tooth blank 12 near the tooth top and the relationship between the pressure angle α1 of the root of tooth and the tooth blank 11 near the tooth bottom and the pressure angle α2 the tooth top and the tooth blank 12 near the tooth top is α2 >α1 and 25 deg.<α2 <45 deg. and the tooth top of the biting section I is point shaped and roundness R is given in the top end, and the roundness R has a configuration of R<2.0.

Process cartridge driving mechanism for image forming device

Abstract: PURPOSE:To stabilize the fitting position of a process cartridge to a main body by specifying the position relation between the driven gear on the side of the process cartridge and the driving gear on the side of a main body CONSTITUTION:The position relation between the driven gear (drum gear) 23 and the driving gear 3 is so set that a driving force operates on the process cartridge 20 in its fitting direction Namely, the rotation of a driving shaft is transmitted to the drum gear 23 on the side of the process cartridge 20 through the driving gear 3 to drive and rotate a photosensitive drum, etc, on the side of the process cartridge 20, thereby carrying out necessary image formation In the case, the direction of a force F that a tooth flank of the drum gear 23 receives deviates by a gear pressure angle alpha from the perpendicular (l) to the straight line connecting the centers of the drum gear 23 and driving gear 3 and this direction is in the fitting direction of a process unit 20 Consequently, the process cartridge 20 is pressed in this fitting direction at the time of the image formation wherein a driving motor is driven, and its fitting position becomes stable

Double-vortex pressure motor

Abstract: In previous attempts to construct a perpetual motion machine, each device ha s found its own equilibrium without producing the anticipated results. The Double-vortex Pressure Motor employs at least two small 'vortex' gears which are engaged with each other, and fixed to a two-shaft bogie. The bogie (and its two vortex shafts) 'fall' between two 'back-eddy' gears whose shafts are fixed to a chassis. On the back-eddy (BE) shafts, and the vortex shafts, are also 'reaching' (large diameter) gears. Perpetual feed-back loops are created by returning the spin gained in both BE gears to the vortex gears via large 'bridging' gears which connect to both the big reaching gear on a BE shaft, and the reaching gear on a vortex shaft which is two wheels away (so that the spin direction is compatible). Reaching arms which join the bridge shaft to the BE and the vortex shafts, work as independently hinging arms. which allow the vortex bogie to fall slightly without compromising contact with the BE shafts. The reaching gears and bridging gears are sufficiently big that they do not come into contact with a fixed position shaft when they fall slightly. While the smaller (slightly separating) vortex gears might function more efficiently with a smaller pressure angle (eg. 14 1/2 degrees) owing to the slight separationwhich occurs when it fall s slightly out of the multi-shaft equatorial which is described when the bogie is in a 'neutral' position, the bridging a nd reaching gears might operate better with a larger pressure angle, and greater available backlash (eg. 20 degrees ), to avoid cramping at the initiating slight-fall event of the vortex 'floating' gears. The initiating event occur s either through the force of gravity on the floating elements, or through a simulated 'gravity' caused when a lever is applied, or through means discussed briefly below. In a two wings variation, two mini-motors may operate cooperatively when the y are related to both sides of a middle Keel Gear and Sprocket, and by sprocket chain they share in common. Chain orbits from each end BE shaft/sprocket, over the middle keel sprocket, and thence to the BE sprocket at the opposite end of the motor. The Double-vortex Motor does not require weight/mass to motivate it, but can of course respond to the imposition of mass within a gravitational field. It can also respond to the simple manual push or pull of a lever arm, or to heat activation, to permanent magnetic force, to electro-magnetic force, to sprin g force, to pulley leverage, to block and tackle advantage, to hydraulic, or to pneumatic advantage. However, in most cases sited above, it doesnot require am involvement with electricity in order to function: it may operate in any positional attitude (there is no 'up' or down necessarily, except for descriptive purposes) and does not require al gravitational field, so it may operate quite satisfactorily in outer space, or within a fluid/liquid environment.