Harmonic drive achieving a high meshing efficiency
A technology of harmonic reducer and bite rate, which is applied in the direction of mechanical equipment, transmission devices, gear transmission devices, etc., can solve the problems that the effect is not as expected, the complexity of the correction equation, and the average load reduction, etc.
Active Publication Date: 2016-01-27
HIWIN TECH
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[0003] It can be known from the above that when the engagement rate between the rigid ring gear and the flexible ring gear is higher, the overall transmission accuracy will be better, and the average load between the teeth will also be reduced. However, because the rigid ring gear and the flexible ring gear The engagement rate between ring gears mainly depends on the curvature change between the long and short axes of the wave generator. In order to have an optimized curvature relationship between the long and short axes of the wave generator, Japanese Patent No. 4067037 and No. Patent No. 5,256,249 proposes a revised design for the curvature of the major and minor axes of the wave generator, but the correction equations used in the aforementioned existing patents have a certain degree of complexity, and the effect that can be achieved after the correction is not as good as expected ideal
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[0014] see figure 1 , The harmonic speed reducer 10 of the present invention includes a rigid ring gear 20 , a flexible ring gear 30 , and a wave generator 40 .
[0015] The rigid ring gear 20 has an inner ring tooth portion 22, the flexible ring gear 30 is arranged in the rigid ring gear 20 and has an outer ring tooth portion 32, the outer ring tooth portion 32 corresponds to the inner ring tooth portion 22 of the rigid ring gear 20 . It should be added here that the number of teeth of the inner ring tooth portion 22 of the rigid ring gear 20 is two teeth more than the number of teeth of the outer ring tooth portion 32 of the flexible ring gear 30, and the rigid ring gear 20 and the flexible ring gear 30 have the same modulus, and the modulus referred to here is the quotient obtained by dividing the pitch diameter of the gear by the number of teeth.
[0016] The wave generator 40 is disposed in the flexible ring gear 30 and has an elliptical outer periphery 42. When the wav...
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A harmonic drive includes a circular spline, a flexspline meshed with the circular spline, and a wave generator abutted against the flexspline. Through a special parameter design to correct the perimeter curve of the wave generator, the meshing efficiency between the circular spline and the flexspline is increased, thereby improving the transmission accuracy and reducing the average load.
Description
technical field [0001] The invention relates to a speed reducer, in particular to a harmonic speed reducer capable of increasing the bite rate. Background technique [0002] The harmonic reducer is a reduction device with a high reduction ratio. In the known structural configuration, it mainly includes a rigid ring gear, a flexible ring gear rotatably arranged in the rigid ring gear, and a rotatable The wave generator arranged in the flexible ring gear, wherein the outline shape of the wave generator is ellipse. When the wave generator is driven by the power source, it will start to rotate. At this time, the flexible ring gear will be pushed up by the outer peripheral edge of the wave generator and deformed, so that the wave will be generated between the rigid ring gear and the flexible ring gear. The long axis of the wave generator can be fully engaged, and the short axis of the wave generator will be completely disengaged. Since there is a difference in the number of teet...
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IPC IPC(8): F16H1/32
CPCF16H49/001F16H2049/003
Inventor 郭长信张胜智
Owner HIWIN TECH