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.

A calculation method of the stiffness of face gear tooth and analysis of its influence factors

Abstract: Tooth stiffness of face gear is one of the components of meshing stiffness of face gear drives. Its resolve can build excellent base for calculation method of meshing stiffness and analysis of dynamic for face gear drives. Based on Buckingham's standpoint,along the length direction of the tooth of face gear,any one of its sections can be considered as a section of rack with varying pressure angle. According to above theory,the tooth form of face gear is simulated successfully. The method of calculation of the tooth's stiffness of face gear is obtained. Compared with conclusion of tooth's stiffness by FEM in the same parameters,it is proofed to be correct. Through analysis of influence of tooth's stiffness by main design parameters of face gear,the benefit conclusions are drawn. That is,the changing ratio of tooth's stiffness decreases with the increase of module,and the tooth's stiffness increases with the increase of pressure angle but the changing ratio almost remains constant. The tooth's stiffness increases with the increase of tooth width and the influence of changing ratio from tooth root to tooth crest is bigger than that of pressure angle.

Infiltration preventing structure of transmission case

Abstract: PROBLEM TO BE SOLVED: To significantly reduce amount of water infiltrating in a starter by a method, wherein the progress of water scraped up through rotation of a ring gear is suppressed. SOLUTION: A recessed part 15 to prevent infiltration of water scraped up through rotation of a ring gear 2 to a starter mounting is formed into a circular inner peripheral surface to form the gear chamber 3 of a transmission case 1. The recessed parts 15 are formed in two spots between the lowermost part of a circular inner peripheral surface 14 in the rotational direction of the ring gear 2 of the circular inner peripheral surface 14 forming the gear chamber 3 and a starter mounting part 5. The recessed part consists of an introduction surface formed approximately at a pressure angle θof the ring gear 2 along the tangential line of the circular peripheral surface 14 in the rotation direction of the ring gear 2, and a damping surface formed in a manner to extend from the deepmost part of the recessed part 15 in the direction of the approximate center of the circular inner peripheral surface 14. Furthermore, the recessed part 15 is formed through integral molding of a mold togetherwith the gear chamber 3 and the starter mounting part 5.

Minimum dimension design of disc cam mechanism with upright installed concave arc bottomed translating follower

Abstract: AbstrcatStarting from the expression of pressure angle,via constructing corresponding analogous velocity chart of mechanism,a clear solving thinking and steps for determining minimum basic dimension of mechanism according firstly to the condition of pressure angle α≤,αr≤r and secondly to the condition of curvature radius ρ≥,thus the theoretical task of minimum dimension design of upright installed concave arc bottomed translating follower disc cam mechanism is solved satisfactorily.

A study on the design of asymmetric spur gears in gear pump applications

Abstract: This paper presents a study on the design of spur gears with asymmetric teeth in external gear pump applications. A model is generated for asymmetric gears and the instantaneous flowrate equation is derived. The process of generating the gear model and the flowrate calculations are automated with a computer program developed in this study. Using the data from the model, tooth contact and root bending stresses are evaluated during a mesh cycle by finite element analyses. Seventeen different spur gear pair designs are tested for different drive side pressure angle, coast side pressure angle and profile shift coefficients. The effects of these parameters on tooth contact stress, bending stress, flowrate and flowrate fluctuation have been investigated for a specific gear pump.

Fan shaft-spline joint

Abstract: PURPOSE: To lighten an engine by constituting a fan driving shaft of the gas turbine engine with inner and outer shafts interconnected through a spline coupling, and constituting the spline coupling with inner and outer splines having a tooth in an involute form having a specific pressure angle. CONSTITUTION: A gas turbine engine has a fan driving shaft 38 extending through a rotor disc of a compressor rotor means, and a front fan disc is mounted to the front end of the shaft 38. The fan driving shaft 38 is constituted with a low pressure turbine shaft 60 and a front fan shaft 62 interconnected through a spline coupling 64, and the spline coupling 64 is constituted with inner and outer splines 65, 66. A plurality of spline teeth 80 defining a portion of an inner spline 54 are engaged with a plurality of outer splines 82 defining a portion of the outer spline 66, and the teeth 80 are formed so as to have a tooth profile 86 including an involute form having a pressure angle β equal to 30 deg..