23
2021-02
Transmission Characteristics and Principle of Harmonic Reducer harmonic gear reducer Harmonic gear reducer is a new type of reducer developed by using the principle of planetary gear transmission. Harmonic gear drive (referred to as harmonic drive), which relies on flexible parts to generate elastic mechanical waves to transmit power and motion of a planetary gear drive. It mainly consists of three basic building blocks: (1) A rigid gear (rigid wheel) with an inner ring gear, which is equivalent to the central wheel in the planetary system; (2) A flexible gear (flexspline) with an outer ring gear, which is equivalent to a planetary gear; (3) Wave generator H, which is equivalent to a planet carrier. Used as a reducer, usually using wave generator active, rigid wheel fixed, flexible wheel output form. The wave generator H is a rod-shaped component, both ends of which are equipped with rolling bearings to form rollers, and are pressed against the inner wall of the flexspline 1. The flexible wheel is a thin-walled gear that can produce large elastic deformation, and its inner hole diameter is slightly smaller than the total length of the wave generator. The wave generator is a component that makes the flexspline produce controllable elastic deformation. When the wave generator is loaded into the flexspline, the section of the flexspline is forced to change from the original circle to the ellipse, and the teeth near the long axis are completely engaged with the teeth of the rigid wheel, while the teeth near the short axis are completely disengaged from the rigid wheel. The teeth of the other sections of the perimeter are in a transitional state of engagement and disengagement. When the wave generator rotates continuously in the direction shown in the figure, the deformation of the flexspline changes continuously, so that the meshing state of the flexspline and the rigid wheel also changes continuously, from meshing in, meshing out, disengaging, re-meshing in..., to realize the slow rotation of the flexspline relative to the rigid wheel along the opposite direction of the wave generator H. When working, the steel wheel is fixed, the motor drives the wave generator to rotate, and the flexible wheel is used as the driven wheel to output rotation and drive the load to move. In the process of transmission, the number of cycles in which the wave generator turns around and a point on the flexspline deforms is called the wave number, expressed in n. Commonly used are two waves and three waves. The flexspline of double-wave transmission has small stress, simple structure and easy to obtain large transmission ratio. Therefore, it is currently the most widely used one. The flexible wheel and the rigid wheel of the harmonic gear drive have the same circumference, but the number of teeth is not equal, usually the difference between the number of teeth of the rigid wheel and the flexible wheel is equal to the number of waves, that is. z2-z1=n Where z2 and z1-are the number of teeth of the rigid wheel and the flexible wheel respectively. When the rigid wheel is fixed, the generator is active, and the flexible wheel is driven, the transmission ratio of the harmonic gear drive is I =-z1/(z2-z1) Double wave transmission, z2-z1 = 2, the number of flexspline teeth a lot. The negative sign above indicates that the steering of the flexspline is opposite to the steering of the wave generator. It can be seen that the harmonic reducer can obtain a large transmission ratio.
01
2021-02
Honghui Technology Harmonic Reducer Transmission Characteristics
1. High precision: multi-teeth mesh at two 180-degree symmetrical positions at the same time, so the influence of gear pitch error and cumulative pitch error on rotation accuracy is relatively average, which can be extremely high. position accuracy and rotation accuracy. 2. Large transmission ratio: The transmission ratio of single-stage harmonic gear drive can reach I = 30~500, and the structure is simple. The three basic components on the coaxial can achieve a high reduction ratio. 3. High carrying capacity: In harmonic drive, the meshing of teeth and teeth is surface contact, and the number of meshing teeth is relatively large at the same time, so the load per unit area is small and the carrying capacity is higher than other drives. form high. 4. Small size and light weight: Compared with ordinary gear devices, the volume and weight can be greatly reduced, realizing miniaturization and light weight. 5. High transmission efficiency and long service life. 6. Smooth transmission, no impact, low noise
25
2021-01
Transmission Principle of Harmonic Reducer
The manufacturing technology of harmonic reducer is based on harmonic drive, which is a mechanical transmission composed of three basic components: wave generator, flexible wheel and rigid wheel. This kind of transmission is to make the flexible wheel produce elastic deformation under the action of the wave generator and interact with the rigid wheel to achieve the purpose of transmitting motion or power. The harmonic unit bearing generates harmonic motion, which drives the flexible wheel of the harmonic reducer (and The bearing is matched) to generate harmonic motion to achieve the variable speed requirement of large transmission ratio. Picture Reducer structure 3D animation show: The precision processing equipment of high-performance reducer mainly comes from foreign manufacturers such as Japan and Switzerland. At the same time, the design, materials, heat treatment, processing technology, gears, bearings, seals, assembly technology, parts testing, finished product testing, etc. All links need high-end technology as support.
23
2021-01
Harmonic reducer 2021 will usher in the first round of shuffling
China Transmission Network Market Analysis
01
2020-09
Review of Honghui Technology -2020ITES Shenzhen Machinery Exhibition
September 01-04, 2020, 2020ITES Shenzhen Machinery Exhibition in Shenzhen International Convention and Exhibition Center (Bao'an New Hall) opened, the exhibition gathered the top domestic robot manufacturers, robot parts research and development manufacturers, research and development institutions.
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