DUAL-TYPE WAVE GEAR DEVICE - HARMONIC DRIVE SYSTEMS

Title:

DUAL-TYPE WAVE GEAR DEVICE

Document Type and Number:

WIPO Patent Application WO/2019/065070

Kind Code:

A1

Abstract:

A dual-type wave gear device (1) wherein an external gear (4) is equipped with first and second external teeth (7, 8) which are different in tooth number, and gaps (9) formed therebetween and serving as a cutter clearance portion for a teeth-cutting cutter. When the maximum width of the gaps (9) is L1, the depth from the tooth crest surface of the first external tooth (7) to the deepest part (9a) of the gap (9) is t1, the tooth height of the first external tooth (7) is h1, the depth from the tooth crest surface of the second external tooth (8) to the deepest part (9a) is t2, and the tooth height of the second external tooth (8) is h2, any of the conditions 1–3 are satisfied. Condition 1: L1 = 0.1L – 0.35L, t1 = 0.9h1 – 1.3h1, t2 = 0.3h2 – 0.9h2 Condition 2: L1 = 0.1L – 0.35L, t1 = 0.3h1 – 0.9h1, t2 = 0.9h2 – 1.3h2 Condition 3: L1 = 0.1L – 0.35L, t1 = 0.3h1 – 0.9h1, t2 = 0.3h2 – 0.9h2 Thus, it is possible to implement a dual-type wave gear device for which the tooth bottom fatigue strength and the wear resistance of the external gear can be increased.

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Inventors:

KIMURA HIROAKI (JP)
HANDA JUN (JP)

Application Number:

PCT/JP2018/032257

Publication Date:

April 04, 2019

Filing Date:

August 30, 2018

Export Citation:

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Assignee:

HARMONIC DRIVE SYSTEMS (JP)

International Classes:

F16H1/32

Foreign References:

JP2016023745A	2016-02-08
US20110088496A1	2011-04-21
JP2016023742A	2016-02-08

Other References: