Transmission device capable of eliminating transmission clearance and clearance eliminating method thereof

Abstract

The invention relates to a transmission device capable of eliminating a transmission clearance and a clearance eliminating method thereof. The transmission device at least comprises a worm rod and a worm gear which are arranged in a box body, wherein the axes of the worm rod and the worm gear are on different planes; detachable worm teeth which can be engaged with worm threads of the worm rod are arranged on the worm gear in the peripheral direction at intervals; the worm gear comprises at least two discs which are attached to each other in the axial direction; rolling bodies distributed in the peripheral direction at intervals are separately arranged at the radial outer sides of the at least two discs; at the condition that the worm rod and / or the worm gear rotate around the axis, the worm threads are engaged with the worm teeth limited by the rolling bodies, which are adjacent to each other in the axial direction and have inclusion angles, of the at least two discs; and the rolling bodies, at the two sides of the axis of the worm rod, of the worm teeth separately revolve in a manner that the rolling bodies can be always in linear contact with the teeth surfaces at the two sides of the worm threads through the adjustment of the inclusion angles and the connecting lines of the axes of every two rolling bodies are crossed with the axis of the worm rod in a non-perpendicular manner.

Description

technical field [0001] The invention relates to the technical field of mechanical transmission, and relates to a speed change device, in particular to a speed change device capable of eliminating a transmission gap and a method for eliminating the gap. Background technique [0002] The worm drive is used in occasions where the two shafts are interlaced, the transmission ratio is large, the transmission power is not too large, or the intermittent work. Because of the advantages of stable transmission, low noise, small impact load, and self-locking, it is used as a mechanical transmission. The main transmission mode is often used in the speed change device. However, in order to form a lubricating oil film between the meshing tooth profiles of ordinary worm drives and avoid gear teeth being stuck due to friction, heat and expansion, there must be a gap between the two non-working tooth profiles of the conjugate teeth. This gap is called Tooth side clearance, referred to as sid...

AI Technical Summary

Problems solved by technology

[0015] Aiming at the shortcomings of the existing structure for eliminating backlash due to the large number of transmission elements, large volume and complex structure, it is difficult to apply to the transmission device of the servo drive system requiring high transmission precision, large load capacity and compact structure. The present invention provides a The speed change device that can eliminate the transmission gap, during the transmission process of the speed change device, the worm teeth defined by at least two rolling elements are in line contact with the tooth surfaces on both sides of the worm track at least in part, so that the two The abutment between the rolling elements and the tooth surfaces on both sides of the wormway avoids the tooth backlash, thereby eliminating the return error during the transmission process, avoiding the impact between the teeth, improving the stability of the transmission, and reducing the sliding friction through the rotation of the rolling elements. Converted to relative rolling friction, reducing tooth surface wear and improving precision life

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