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
| Model | Reduction ratio | Rated torque at 2000r/min input | Permissible peak torque at start and stop | Permissible maximum value for average load torque | Permissible maximum momentary torque | Permissible maximum input rotational speed(Grease) | Permissible average input rotational speed(Grease) | Backlash | Weight | Design life |
|
| Nm | Nm | Nm | Nm | r/min | r/min | Arc Sec | Kg | Hour |
| 14 | 50 | 3.7 | 12 | 4.8 | 23 | 8500 | 3500 | ≤20 | 0.34 | 9000 |
| 80 | 5.4 | 16 | 7.7 | 35 | 10000 |
| 100 | 5.4 | 19 | 7.7 | 35 | 10000 |
| 17 | 50 | 11 | 23 | 18 | 48 | 7300 | 3500 | ≤20 | 0.42 | 9000 |
| 80 | 15 | 29 | 19 | 61 | 10000 |
| 100 | 16 | 37 | 27 | 71 | 10000 |
| 20 | 50 | 17 | 39 | 24 | 69 | 6500 | 3500 | ≤20 | 0.54 | 9000 |
| 80 | 24 | 51 | 33 | 89 | 10000 |
| 100 | 28 | 57 | 34 | 95 | 10000 |
| 25 | 50 | 27 | 69 | 38 | 127 | 5600 | 3500 | ≤20 | 0.95 | 9000 |
| 80 | 44 | 96 | 60 | 179 | 10000 |
| 100 | 47 | 110 | 75 | 184 | 10000 |
| 32 | 50 | 53 | 151 | 75 | 268 | 4000 | 3000 | ≤20 | 1.9 | 9000 |
| 80 | 83 | 213 | 117 | 398 | 10000 |
| 100 | 96 | 233 | 151 | 420 | 10000 |
Detailed Images of LHD Series Harmonic Drive
| Key Attributes of LHD - I Series Ultra - Flat Strain Wave Reducer |
| Product | Ultra - Flat harmonic drive |
| Steel, Aluminum, Polyurethane, Bearings and Seals, Lubricants |
Reduction Ratio | 50, 80, 100 |
| Less than 20 Arc Sec |
Average Input Speed | 3500 r/min |
| 8500 r/min |
Design Life | 10000 hours |
| 14, 17, 20, 25, 32 |
Weight | 0.34 to 1.9 kg |
| Warranty | 1 year |
Application
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
FAQ
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.
3. Do you support customizing a harmonic drive do?
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?
The main components are the circular spline (fixed outer ring), the
flexspline (flexible inner ring with fewer teeth), and the wave
generator (an elliptical disc that fits inside the flexspline).
6. What applications are harmonic drives used in?
They are used in applications requiring high precision and
reliability, such as robotics, aerospace, defense, medical
equipment, and semiconductor manufacturing equipment.
7. How do you select a harmonic drive for a specific application?
Selection depends on factors like torque requirements, desired
reduction ratio, space constraints, load capacity, and
environmental conditions. It's essential to consult with
manufacturers or experts to choose the appropriate model.
