Impact of Cycloid’s and Roller’s Dimensional Errors on the Performance of a Cycloidal Drive for Power Transmission

Abstract

Cycloidal roller gearboxes offer good performance in terms of loading capacity and overloading limits, but a precise manufacturing process is required to avoid overloads on relatively small teeth. In addition, these gearboxes are very sensitive to lubrication, which plays an important role on the contact surfaces of rollers and teeth. However, it is acknowledged that an equivalent Cycloidal–Wolfrom configuration can be a possible solution to improve these aspects. In this work, the authors perform a comparison between two equivalent configurations, investigating how tolerances can affect the performances. The investigation approach is based on the use of simulations performed through virtual models of the main wheels of the gearboxes. The outcomes suggest a high suitability of the proposed Wolfrom configuration for applications with high transmitted torques, relatively poor materials, and modest construction tolerances.

Determination of Mechanical Power Loss of the Output Mechanisms with Serially Arranged Rollers in Cycloidal Gears While Taking into Account Manufacturing Tolerances

“…Proceeding as in the first stage, the distribution of forces Fj(β) (22), the distribution of contact pressures pj(β) (23) and (24), and the distribution of mechanical power losses PC (43) were determined, while the number of rollers m carrying the torque MK and the angle βk m by which the sliding plate must rotate to balance the torque MK were determined from the algorithm in Figure 4 and expressions (19) and (20). The results of the calculations are summarized in Figure 13.…”

“…The authors of the paper [20] compared two solutions of the cycloid gearbox, differing in the output mechanism. One gearbox was characterized by the output mechanism being a second-stage wheel rigidly connected to the output shaft (the Wolfrom configuration), while the other used the well-known pin output mechanism.…”

Multi-Objective Optimization Design of Cycloid-Pin Gears Based on RV Reducer Precision Transmission Performance

“…At present, research on the design of cycloid-pin gear primarily focuses on aspects such as error impact analysis, tolerance optimization and selection, profile modification design, meshing contact analysis and structural dimension parameter analysis. Errors are a critical factor influencing the accuracy of gear transmission, while tolerances determine the machining process requirements for gears [6]. Thus, error impact analysis, tolerance optimization, and selection are focal points of the active design research for cycloid-pin wheel transmission at the microscopic scale.…”