Research on the Design and Modification of Asymmetric Spur Gear

Abstract

A design method for the geometric shape and modification of asymmetric spur gear was proposed, in which the geometric shape and modification of the gear can be obtained directly according to the rack-cutter profile. In the geometric design process of the gear, a rack-cutter with different pressure angles and fillet radius in the driving side and coast side was selected, and the generated asymmetric spur gear profiles also had different pressure angles and fillets accordingly. In the modification design of the gear, the pressure angle modification of rack-cutter was conducted firstly and then the corresponding modified involute gear profile was obtained. The geometric model of spur gears was developed using computer-aided design, and the meshing process was analyzed using finite element simulation method. Furthermore, the transmission error and load sharing ratio of unmodified and modified asymmetric spur gears were investigated. Research results showed that the proposed gear design method was feasible and desired spur gear can be obtained through one time rapid machining by the method. Asymmetric spur gear with better transmission characteristic can be obtained via involute modification.

Classifying, Predicting, and Reducing Strategies of the Mesh Excitations of Gear Whine Noise: A Survey

“…For the improvement of computational efficiency, a properly simplified 2D FE model [105,106] is popular for calculating TE for spur gears. When misalignment and nonuniform load distribution along contact lines are considered, a 3D FE model [107][108][109][110][111] of the spur gear should be applied. However, for helical gears [112,113], a 3D FE model is essential for the complex geometry.…”

Houser Gear Conceptual Model for New Nurse Educators

“…These efforts include planning, meeting with students, teaching content, managing classroom behaviors, and leading engaging activities (Billings & Halstead, 2016). The "work" of a nurse educator may be compared to a well-oiled gear system (Deng et al, 2015). Using this analogy, gears do not operate in isolation, and neither do classroom dynamics.…”

“…Gears turn, creating energy within the system (Deng et al, 2015). One gear in the Houser gear conceptual model is nursing leadership in the classroom; a second gear is the use of active teaching strategies.…”

Influence of tooth asymmetry and mating gear material on the tooth deflection characteristics of polymer gears

“…The increase in addendum length reduced the amplitude of STE in asymmetric gears. Deng et al 20 proposed changes in the pressure angle of the rack-cutter to improve the transmission characteristics of asymmetric gears.…”