Synthesis of indexing mechanisms with non-circular gears

Generation of Noncircular Bevel Gears With Free-Form Tooth Profile and Curvilinear Tooth Lengthwise

This study describes rack cutters with circular-arc profile teeth to generate elliptical gears which rotate about one of their foci. A mathematical model for elliptical gears with circular-arc teeth is developed according to gear theory. The influence of the design parameters, such as the number of teeth, gear module, pressure angle at the pitch point and the major-axis, are investigated. The effects of the circular-arc radius of the rack cutter on both the undercutting of teeth and on pointed teeth of the generated circular-arc elliptical gear are also studied. Three numerical examples are presented to elucidate the generation of gear tooth profiles using the proposed mathematical model, and to investigate the phenomena of tooth undercutting and pointed teeth.

Computerized Tooth Profile Generation and Analysis of Characteristics of Elliptical Gears with Circular-Arc Teeth

Design and manufacture of new type of non-circular cylindrical gear generated by face-milling method

Analysis of loaded characteristics of helical curve face gear

Linkage model and manufacturing process of shaping non-circular gears

Synthesis of Shaped Noncircular Gear Using a Three-Linkage Computer Numerical Control Shaping Machine

The invention discloses a variable-rigidity hydraulic driving mechanism based on a giant magnetostrictive material and a variable-rigidity control method thereof. The mechanism comprises a shell, a GMM rod arranged in the shell, a GMM rod driving control device, a hydraulic device, and a load displacement and stress feedback device; the GMM rod driving control device comprises an electromagnetic coil and a direct-current bias coil; and the load displacement and stress feedback device comprises a displacement sensor and a force sensor. The mechanism further comprises a variable-rigidity controller; the variable-rigidity controller receives sensing signals of the displacement sensor and the force sensor, and calculates the rigidity of a mechanical load; and the variable-rigidity controller adjusts input voltage of the direct-current bias coil according to the rigidity of the load, so that the driving rigidity of the GMM rod output to the mechanical load through the hydraulic device is matched with the rigidity returned by the mechanical load. The mechanism has the advantage of solving the problems of frequency response and transmission efficiency in a traditional hydraulic driving mechanism.

Variable-rigidity hydraulic driving mechanism based on giant magnetostrictive material and variable-rigidity control method thereof

According to Jarvis March method and characteristics of non-circular gear's tooth profile, a numerical algorithm of non-circular gear's tooth profile based on Jarvis March has been proposed. This method can calculate the non-circular gear's tooth profile with the help of improved Jarvis March method. And improve efficiency and accuracy by simplify shaper cutter model and envelope process. So this method can calculate the non-circular gear's tooth profile accurately and efficiently. In order to detect the correctness and efficiency of this method, the method has been used to calculate the tooth profile's curve data of non-circular gear. In the end, good results have been obtained and indirectly verify the correctness and efficiency of this method.

Bo Li

Papers

Linkage model and manufacturing process of shaping non-circular gears

Synthesis of indexing mechanisms with non-circular gears

Synthesis of Shaped Noncircular Gear Using a Three-Linkage Computer Numerical Control Shaping Machine

Variable-rigidity hydraulic driving mechanism based on giant magnetostrictive material and variable-rigidity control method thereof

Numerical Algorithm of Non-circular Gear's Tooth Profile Based on Jarvis March