HARMONIC DRIVE

Laifual Harmonic drive (strain wave gear, harmonic gearbox, harmonic reducer) mainly consists of three parts. Which are wave generator, flex spline, cicular spline. Our harmonic drive has the characteristics of zero-backlash, low-temperature rise, low starting torque, high reliability, high load capacity, long lifetime, big speed ratio, small size, etc. Laifual drive is a top manufacturer for harmonic drive. With more than 10 years R&D experience. Supplied harmonic drive to many robotic & automa

Product

LS Series

The LS cup type features a flexspline with external gear teeth in the shape of a cup. Available options include: standard, high-torque, ultra-flat, lightweight, and big bore.

LH Series

The LH hat type features a brim that looks very similar to a silk hat, hence the name. The brim acts as a perfect mounting surface, leaving a large through hole.

LS full series display video

HARMONIC DRIVE WORKING PRINCIPLE

As a reducer, the harmonic gear reducer is often in status as the wave generator drives, the circular spline is fixed, and the flex spline is output end.

When the harmonic wave generator is put inside of the flex spline, the flex spline is forced into an elliptical shape causing the flex spline teeth to engage with the tooth profile of the circular spline along the major axis of the ellipse, with the teeth completely disengaged across the minor axis of the ellipse.

The rotation of the wave generator makes the flex spline deform continuously, the teeth change operating state in the process of engagement and disengagement, thus the power harmonic drive transmission between wave generator and flex spline is realized.

HARMONIC REDUCER COMPOSITION

Harmonic gear reducer has three basic components: a wave generator,a flexspline and a circular spline.

01
Wave Generator

The Wave Generator, a high-efficiency torque converter featuring a precisely machined elliptical ball bearing on an elliptical hub, connects directly to the motor shaft and serves as the main input for the gear assembly. It is typically used with a servo motor in applications needing controlled motion or torque transmission.
02
Flexspline

The Flexspline, made from alloy steel into a thin cylindrical cup with external teeth at its open end, adjusts to an elliptical shape when the Wave Generator is inserted.
03
Circular Spline

The Circular Spline comprises a sturdy ring with internal teeth. As the gear is assembled, it meshes with the teeth of the Flexspline along the major axis of the Wave Generator ellipse. This interaction resembles an ellipse inscribed concentrically within a circle. From a mathematical perspective, an inscribed ellipse intersects a circle at two points. Nevertheless, due to the finite height of the gear teeth, there exist two regions of tooth engagement instead of just two points. Featuring two additional teeth compared to the Flexspline, the Circular Spline is affixed to the gear housing.

FAQ

What is a strain wave gear box?
+

A strain wave gear box is a type of gear system that produces high reduction ratios in a compact size. It uses the mechanics of a flexible element deforming to transmit motion and achieve high precision and torque.
How does a harmonic gear box work?
+

A harmonic gear box works by using a circular spline, flexspline, and a wave generator. The wave generator deforms the flexspline into an elliptical shape, which then engages with the teeth of the circular spline at two points, providing a high reduction ratio through the difference in tooth count between the engaged elements.
What are the main components of a strain wave 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).
What are the advantages of using harmonic/strain wave gear boxes?
+

Strain wave/harmonic gearboxes offer high precision, zero backlashes, high torque capacity, compact size, and lightweight. They are also known for their excellent positional accuracy and repeatability.
What applications are harmonic-type drives used in?
+

They are used in applications requiring high precision and reliability, such as robotics, aerospace, defense, medical equipment, and semiconductor manufacturing equipment.
How do you select a strain wave 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.
What are the different types of strain wave gearboxes?
+

Circular spline gearboxes
Cup-Type Gearboxes
Flat Gearboxes
What is a circular spline?
+

The circular spline in strain wave gearboxes are characterized by their robust design.

NEED A ONE-STOP SOLUTION?

We believe in delivering excellent customer service and we are dedicated to our customers.
If you want to know more about our products, prices, and customized services, please contact us with more details, we will respond as soon as possible.

High Voltage

Low Voltage

LS Series

LH Series

HARMONIC DRIVE

LS Series

LSS High Precision Harmonic Gearbox

LSN Light Weight Harmonic Drives

LSG High Torque Harmonic Drives

LSD Shorten Thin Harmonic Gearbox

LFS Ultra Flat Harmonic Gearbox

LH Series

LHT High Precision Harmonic Gearbox

LHN Light Weight Harmonic Gearbox

LHG High Torque Harmonic Gearbox

LHD Shorten Thin Harmonic Gearbox

LS full series display video

HARMONIC REDUCER COMPOSITION

Wave Generator

Flexspline

Circular Spline

FAQ

What is a strain wave gear box?

How does a harmonic gear box work?

What are the main components of a strain wave drive?

What are the advantages of using harmonic/strain wave gear boxes?

What applications are harmonic-type drives used in?

How do you select a strain wave drive for a specific application?

What are the different types of strain wave gearboxes?

What is a circular spline?

NEED A ONE-STOP SOLUTION?

Quick Links

Product

Application

About Us

Inquire