Cycloidal Pinwheel Transmission Based on Floating Needles and Its Modification Method

Abstract

The invention relates to a cycloid pin gear transmission device based on a floating pin gear and a reshaping method of the cycloid pin gear transmission device. The cycloid pin gear transmission device based on the floating pin gear comprises a shell body, pin gears, springs and an end cover, wherein pin gear grooves for storing the pin gears are formed in an inner side wall of the shell body; a cycloid pin gear is arranged at the center of the shell body; the pin gears are arranged in the pin gear grooves; the pin gears are in contact with the cycloid pin gear and the pin gear grooves at the same time; the pin gears are circular-platform-shaped pin gears; a side face of the cycloid pin gear is a conical surface matched with tapered surfaces of the pin gears; the end cover is connected onto the shell body; the springs are arranged between large end faces of the pin gears and the end cover; the tapered angle phi of the pin gears meets a formula: phi is more than 0 and less than or equal to arctanpi / 2mu, wherein mu is a friction coefficient of contact surfaces of the pin gear grooves and the pin gears; the tapered angle theta of the cycloid pin gear in the width direction is equal to 2phi. According to the cycloid pin gear transmission device provided by the invention, gap defects between the cycloid pin gear and the pin gears, caused by manufacturing errors and working abrasion can be made up; all the pin gears can be in contact with the cycloid pin gear, so that the transmission bearing capability and the transmission precision of the cycloid pin gear are remarkably improved.

Description

technical field [0001] The invention relates to the field of precision reducers, in particular to a cycloidal pinwheel transmission device based on floating pin teeth and a modification method thereof. Background technique [0002] Cycloidal pinwheel transmission is a device that utilizes cycloidal gears and pin teeth to achieve power transmission. From a geometric point of view, the cycloidal gear is in contact with all the pin teeth; from a mechanical point of view, half of the pin teeth participate in power transmission. Small and many other advantages. At present, cycloidal pinwheel transmission is widely used in high-precision reducers for joints of industrial robots. For example, the RV reducer of Nabtesc Company in Japan uses cycloidal pinwheel transmission. [0003] However, due to manufacturing errors and work wear and tear, not all pin teeth in the actual cycloidal pin gear can contact with the cycloid gear. There is a gap between some pin teeth and the cycloid g...

AI Technical Summary

Problems solved by technology

These methods are complicated to calculate the amount of modification, require high dimensional accuracy, and are difficult to process. More importantly, these methods cannot be applied to the unfavorable conditions caused by the gap caused by wear in the cycloidal pin wheel transmission process.

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