To check the data consistency of gears in each of the processes of design, manufacturing, qualification, and mounting, the data should be checked for consistency at every step of the process. The backlash (mechanical clearance) is one of the key factors changing gear mesh performance. It is inevitable due to operational needs, manufacturing errors and installation variations. In prior studies of the research, backlash minimization is conducted for only one spur/helical set gear pair, three gear trains, and planetary gearbox with using the self-compensation methodology. By evaluating quality reports of manufactured gears, we were able to predict operating backlash during operation and determine the backlash range. After measurements, they could be classified & grouped into different assembly subgroups for minimum/targeted backlash condition. Unless out of design limits, almost no component will be wasted. The in-house software can perform prediction, minimization, and selection of the right couples. In addition to these, manufacturing company with mounting service capacities or design company with mounting service capacities can be follow this method. In this paper, certain amount of sun, planet, and ring gears that are part of serial product planetary gearboxes are added to (excel) sheets of different runouts, tooth thicknesses under span measurement/over two balls methodologies and superimpose parameters which are sources of backlash by using manufacturing reports.

The usage areas of plastic gear are increasing day by day because they are light, durable, easy to manufacture, and economical. Beveloid gears can operate on intersecting or divergent axes as well as parallel axes. Another important feature is that they are suitable for backlash adjustments with cross-cone angles like (+/-). The aim of this project is to classify beveloid gear quality tables via high-accuracy quality controls for gears made of plastic material (external-external and/or external/internal) with the involute profile. Minimum deviations and distortions are allowed in the profile and lead to providing the contact ratio performance values in the gears determined by the designer. Quality classification is carried out using traditional measurement methods on the profile and leads to straight beveloid gear internal and external gear made of plastic material in a 3D printer. The quality classification of cylindrical, worm, and bevel gear types is subject to classifications included in norms such as AGMA, ISO, and DIN. Since the general quality classification for plastic gear is in the low group, the minimum acceptance criteria for quality classification are cumulative pitch, single pitch deviation, and tooth thickness fluctuations are measured to define quality classification. When the quality inspection was made, tooth thickness variability was considered by using in-house software for Beveloid gear profiles. In-house software capabilities internal and external spur/helical beveloid gear profile generating considering linear and nonlinear profile shift.

In emerging transmission technologies for robotics, several purpose-made gearboxes have been developed. In this paper, it is aimed to first establish the mathematical model and kinematic diagram of the Gear Bearing Drive (GBD) developed by NASA, which is one of the compact gearboxes powered by brushless motors with high gear ratio used in modern robotic technologies, with the help of planetary gear train kinematics with wolfrom-based topology, to examine the established mathematical model analytically and then to move it to the virtual environment with the help of MATLAB® Simulink®. Although essential information such as understanding the behavior of GBD and determining for which systems it is suitable to be used is understood from previous studies, a clear efficiency expression for GBD has not been encountered in this works available. In this study, it is intended to establish an expression for the estimation of efficiency for a GBD by considering the power losses of the components within the system.

The invention relates to a method developed to estimate the actual backlash and to mount planetary gearboxes with a low backlash taking the production and operating conditions of planetary gearbox components into account

Even if rotates unidirectional or bidirectional, a certain amount of space (free angular movement usually called “backlash”) between meshing teeth flanks are allowed for functional reasons. The actual value and effects of the mechanical clearance that is critical in the mesh condition of gears have been a subject to be investigated by gear engineers. The actual backlash stems from time-varying backlash and constant backlash. User friendly software has been developed in MATLAB, to guide assembly personnel/staff to create a combination of different gearbox components from the measurement data bank to obtain a specified backlash range for three gear train. Provided that, different gearboxes with different backlash values/ranges will be assembled by using manufactured and measured components. Unless out of design limits, almost no component will be wasted. This condition will also avoid any slowing of manufacturing and helping to increase production capacity. In the present paper, operating behaviour of system is evaluated in terms of backlash also the automatically self-compensation of sources of backlash methodology is applied to three gear train for backlash parameter.