Cup-shaped flexible gear cylinder structure

Abstract

A cup-shaped flexible gear cylinder structure comprises a cylinder side wall and a cylinder bottom connected to the cylinder side wall, wherein a through hole is formed in the middle of the cylinder bottom, and the opposite positions of the two sides of the through hole are each provided with a flange hole; a corrugated structure and a first transition part are arranged at the positions, close tothe cylinder bottom, of the cylinder side wall, the corrugated structure is connected to the first transition part, and the first transition part is connected to the cylinder bottom; the thicknesses of all parts of the corrugated structure is equal, and the wave crest arc radius of the corrugated structure is unequal to the wave trough arc radius of the corrugated structure; the first transition part is composed of two sections of arcs with different radiuses, and the thickness of the first transition part is smaller than that of the corrugated structure; and a second transition part is arranged at the position, close to the flange hole, of the cylinder bottom, the second transition part is composed of four sections of arcs with different radiuses, and the radiuses of the four sections ofarcs are sequentially reduced in the direction from the cylinder side wall to the through hole. The phenomena of stress concentration at the transition area of the cylinder bottom and the cylinder body and stress concentration at the transition area of the cylinder bottom radial plate and the cylinder bottom flange can be greatly reduced, so that anti-fatigue capacity is improved, and bearing capacity of the flexible gear is improved.

Description

technical field [0001] The invention relates to a cup-shaped flexspline cylinder structure, which is used to reduce the stress concentration of the flexspline caused by elastic deformation and improve the load-bearing capacity of the flexspline. Background technique [0002] As the weakest part of the harmonic reducer and the most prone to fatigue damage, the flexspline has a great influence on the load and life of the flexspline. As an elastic deformation body, the flexspline is in a state of alternating stress under the forced deformation force of the cam, and it is easy to produce stress concentration and uneven distribution of load stress in the transition area of ​​the deformation zone. [0003] The commonly used structures of flexsplines are cup-shaped, hat-shaped, ring, etc. Among them, the structure of cup-shaped flexsplines is the most complex and has serious stress concentration phenomenon, which makes the flexsplines prone to fatigue damage. At present, the commo...

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Problems solved by technology

[0003] The commonly used structures of flexsplines are cup-shaped, top-hat-shaped, ring-shaped, etc. Among them, the structure of cup-shaped flexsplines is the most complex and has serious stress concentration phenomenon, which makes the flexsplines prone to fatigue damage.

At present, the commonly used cylinder structure of cup-shaped flexible splines is a straight cylinder, that is, a smooth and thin-walled cylinder is used, and the wall thickness does not change. Although a circular arc transition is used between the cylinder body and the bottom of the barrel, there is still a phenomenon of stress concentration; the current flexible spline cylinder The bottom structure generally adopts an inclined line with an angle of 1-3° as the transition structure. Although this structure realizes the design of equal-strength beams to a certain extent, the stress transition zone in the transition zone between the tube bottom web plate and the tube bottom flange is small. Stress concentration still prominent

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