Harmonic gear transmission is a transmission that achieves motion or power transmission by elastic deformation of an intermediate flexible member (flexible wheel). It has the advantages of large transmission ratio, compact structure, high efficiency and high motion precision.
The soft wheel is one of the most important components. It is subject to alternating stress during work and is prone to damage. Therefore, the strength research of the flexible wheel is an important issue in harmonic gear transmission. Determining the stress magnitude and distribution of the flexible wheel is the key to strength research.
The internal force and deflection in the flexible wheel housing are extremely complex and difficult to calculate. In theory, it cannot be accurately obtained and can only be determined experimentally. At the same time, the ratio of the maximum radial deformation to the thickness of the flexible wheel is greater than 0.2, which is a nonlinear geometric problem with large deflection. Caesar air compressor, in order to obtain the exact distribution of stress on the flexible wheel shell, the finite element method is finally used.
The maximum position of the soft wheel stress appears in the contact area between the ring gear and the wave generator, that is, the angle between the section of the flexible wheel and the long axis is ±β; the maximum stress value is 394.382 MPa, and the minimum stress value is 339.351 kPa. The transition stress of the cup mouth to the ring gear is increasing, reaching the maximum at the front end of the ring gear, and the transition stress from the ring gear to the shell is gradually reduced, and the stress increases again due to the boundary condition at the bottom of the cup. In addition, the stress on the long axis is larger than that on the short axis, and is more pronounced near the ring gear.
The initial deformation diagram of the cup-shaped flexible wheel under the action of the wave generator is shown in Fig. 7. When the ring gear of the flex wheel is in a working deformation state, deformation is also generated in other parts of the flex wheel, and such deformation continues to the connecting portion of the flex wheel and the shaft, so that the bus bar of the cylinder is not parallel to the axis. The phenomenon of uneven distribution of load along the tooth length direction is generated, and the fatigue wear of the teeth in the maximum deformation region is accelerated.
Mini CNC Router Mainly for advertising industry , small crafts , logo , doorplate, luminous words , pcb , student project , hobby purpose , advertising signs etc. Small size , easy to move.
Normal size 600*900mm working area.
Standard 2 design:
Samples:
All machine accessories from CE supplier, and the machine with strict test link, ensure the best performance.
Mini CNC Router
Mini CNC Router,CNC Wood Router,CNC Router Machine,Small CNC Router
Shandong Leapion Machinery Co., Ltd. , http://www.leapionlaser.com