An external meshing double helical gear planetary transmission reducer

Abstract

The invention discloses an external-gearing type double-helical gear planetary transmission speed reducer. The speed reducer is characterized in that a transmission system fully adopts an external-gearing type double-helical gear ordinary gear train transmission structure; a transmission device is not provided with an annular gear and does not adopt the internal gearing mode; external-gearing is adopted in both stages; the center line of a low-speed shaft is overlapped with that of a high-speed gear shaft; power is distributed onto a plurality of double-helical gears via the high-speed gear shaft, and then converged onto the low-speed shaft via a plurality of planetary gear shafts to be output; a central gear on the low-speed shaft is formed by assembling and splicing a left helical gear and a right helical gear, which rotate in opposite directions and have the same parameters; a plurality of double-helical gears uniformly distributed in a circumferential direction are integral type herringbone gears; both the high-speed gear shaft and the planetary gear shafts are integral type double-helical gear shafts. The speed reducer has the benefits of high transmission precision, low vibration noise, high reliability, low manufacturing cost and wide application prospect.

Description

technical field [0001] The invention relates to the field of mechanical transmission, in particular to an external meshing double helical gear planetary transmission reducer. Background technique [0002] The principle of the planetary reducer is a power transmission mechanism, the centerline of the input shaft and the output shaft coincides, and the epicyclic gear train is used to reduce the number of revolutions of the prime mover to the number of revolutions required by the working computer and obtain a larger torque mechanism. The planetary gear reducer has the characteristics of light weight, small size, large transmission ratio range, high efficiency, stable operation, low noise and strong adaptability. The inner ring gear is one of the essential transmission parts in the conventional planetary reducer. Due to the difficulty in processing the inner ring gear, especially the manufacturing of the high-precision inner ring gear is extremely difficult, especially the grind...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortcomings of the above-mentioned prior art, the present invention provides an external meshing double helical gear planetary transmission reducer, which can overcome the advantages of planetary transmission without an internal ring gear and realize the output of a coaxial fixed-axis gear train. Its core is The two stages all adopt the external meshing transmission mode. There is no internal ring gear and internal meshing mode in the transmission system. The power is divided by the high-speed gear shaft to several double helical gears, and then the power is converged to the left helical gear and the left helical gear by several planetary gear shafts. On the right helical gear, output through the low-speed shaft, the system all adopts double helical gear transmission, and the transmission system adopts an integral herringbone double helical gear and a combination of two helical gears with opposite rotation directions and the same parameters to form a double helical gear. The comprehensive structure design of gears solves the problem of difficult assembly of herringbone gears. The transmission system adopts fixed-axis gear trains instead of epicyclic gear trains. There is no need for planetary racks, which improves the reliability of the transmission system and avoids potential safety hazards in extreme environments.

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