Method for improving stress concentration of outer contour of flexible gear
A technology of stress concentration and outer contour, applied to components with teeth, belts/chains/gears, portable lifting devices, etc., can solve problems such as reducing the fatigue life of harmonic reducers, achieve good application prospects, reduce interference, Effect of improving fatigue life
Active Publication Date: 2021-08-31
国华(青岛)智能装备有限公司
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] Because the top-hat flexspline is supported by the wave generator to produce a large strain, it is easy to form stress concentration at the front and rear ends of the flexspline tooth, the bottom of the flexspline cup, and the connection between the flexspline cup body and the flange, such as image 3 and Figure 4 As shown, the harmonic reducer breaks during use, which greatly reduces the fatigue life of the harmonic reducer
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0038] The present invention will be further described below in conjunction with accompanying drawing.
[0039] Such as Figure 5 As shown, the outer contour of the flexspline of the present invention adopts the method of continuous mathematical characterization to define and describe the structure of the curve equation of the hat-shaped flexspline of the harmonic reducer, which reduces the stress concentration phenomenon at the dangerous point and improves the harmonic deceleration. service life of the device. Specifically include the following steps:
[0040] (1) Establish a Cartesian coordinate system with the central axis of the top-hat flexspline as the abscissa axis and the cup bottom flange as the ordinate axis, which is used for the curve equation representation of the outer contour structure of the top-hat flexspline.
[0041] (2) The outer contour of the hat-shaped flexible spline includes the straight line section AB of the cup bottom flange, the connecting curve ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a method for improving stress concentration of an outer contour of a flexible gear. The method comprises the steps that a coordinate system for the structural shape of the outer contour of the flexible gear is established, and the flexible gear outer contour comprises a cup bottom flange straight line section, a cup bottom flange and cup body connecting curve section, a cup bottom curve transition section, a cup body connecting curve section, a tooth rear end connecting straight line section, a tooth top straight line section, a tooth front end straight line section and a tooth root curve section which are sequentially connected. According to the method for improving the stress concentration of the outer contour of the flexible gear, mathematical description of the outer contour of the flexible gear is performed through a continuous curvilinear equation, the connecting section of a cup bottom flange and a cup body and the connecting section of the cup body adopt curves to replace traditional straight lines, and the stress concentration at the connecting positions of the flexible gear cup bottom and the flexible gear cup body with the flange is effectively reduced; a tooth root adopts a curve instead of a straight line, and interference between the flexible gear tooth front end and a rigid gear caused by supporting of a wave generator is effectively reduced, so that the stress concentration phenomenon is reduced; and in addition, the outer contour of the flexible gear is represented by adopting the continuous curvilinear equation, a mathematical model is provided for machining and detection of the outer contour of the flexible gear, and the method has good application prospects.
Description
technical field [0001] The invention relates to a method for improving stress concentration, in particular to a method for improving the stress concentration of the outer contour of a flexspline. Background technique [0002] The robot joint harmonic reducer belongs to the gear transmission device with high precision and high reduction ratio, and is an essential core component for the robot to realize the motion function. The structure of the current mainstream harmonic reducer is as follows: figure 1 As shown, its core components are figure 2 The hat-shaped flexible spline and rigid spline shown in the harmonic reducer mainly rely on the elliptical wave generator to support the top-hat-shaped flexible spline to produce elastic deformation. During the rotation of the wave generator, the top-hat-shaped flexible spline and rigid spline form differential teeth Therefore, the mechanical properties of the flexible spline after deformation are particularly critical. [0003] B...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): F16H49/00F16H55/17F16H55/08
CPCF16H49/001F16H55/17F16H55/0833
Inventor 胡秋实王超王广李磊周宏根
Owner 国华(青岛)智能装备有限公司