High Precision Ultra - Flat Harmonic Drive

Product Description

Harmonic Drive, mechanical speed-changing device, invented in the 1950s, that reduces the gear ratio of a rotary machine to increase torque. It operates on a principle different from that of conventional speed changers. The device consists of a thin ring that deflects elastically as it rolls inside a slightly larger rigid circular ring.

There are three elements in a basic Harmonic Drive: a circular spline, a flexspline, and a wave generator. The circular spline has internal teeth that mesh with external teeth on the flexspline. The flexspline has fewer teeth and consequently a smaller effective diameter than the circular spline. The wave generator is elliptical in shape and acts as a link with two rollers that rotates within the flexspline, causing it to mesh with the circular spline progressively at diametrically opposite points. If the wave generator (the input) rotates clockwise while the circular spline is fixed, the flexspline (the output) will rotate or roll inside the circular spline at a much slower rate in a counterclockwise direction.

Key Features

Ultra-flat harmonic gear reducers are highly suitable for use as robot end joints and customer-end reducers.

These new high-torque, zero-backlash gear units have an ultra-flat configuration and feature a large cross-roller bearing with high-moment stiffness.

• Ultra-flat structure
• Compact and simple design
• Small size and lightweight
• High torque capacity and high rigidity
• Coaxial input and output

Parameters Table of LHD Series Harmonic Drive

Detailed Images of LHD Series Harmonic Drive

Key Attributes of LHD - I Series Ultra - Flat Strain Wave Reducer
Product	Ultra - Flat harmonic drive
Material	Steel, Aluminum, Polyurethane, Bearings and Seals, Lubricants
Reduction Ratio	50, 80, 100
Backlash	Less than 20 Arc Sec
Average Input Speed	3500 r/min
Max Input Speed	8500 r/min
Design Life	10000 hours
Model	14, 17, 20, 25, 32
Weight	0.34 to 1.9 kg
Warranty	1 year

Application

Industrial Robots	Medical Devices	Aerospaces
Huamnoid Robots	Optical Machines	Packaging Systems

Our Factory

PDF Drawings Download

LHD-14-XX-U-I.pdf LHD-17-XX-U-I.pdf LHD-20-XX-U-I.pdf

LHD-25-XX-U-I.pdf LHD-32-XX-U-I.pdf

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FAQ

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1. Can a harmonic drive be backdriven?

Yes the harmonic drive gear can be driven back. By the way, this happens in every typical robotic cycle hundreds of times every day: Every time when the axis is in motion and slowed down rapidly, the load inertia on the gear output side drives back the gear (in a controlled manner, determined by motor and controller).

2. What does a harmonic drive do?

Hamornic drives are used in increasing the output torque in gears used in milling, in manufacturing, and in machines that use robotic arms.

Yes of course. We can customize a harmonic drive based on customer's specific requirements and drawing.

4. What's the biggest advantage of your products?

We can provide complete product series, and the qualty of our harmonic drive is stable. The most important is the highest cost-effective in China.

5. What are the main components of a harmonic drive?