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What are the requirements of the drum profile for the use of the drum coupling?
Generally speaking, there are certain requirements for the drum curve when the drum coupling is used. The drum tooth surface of the non-conjugate tooth surface is formed by the gradual displacement of different end sections, and the dashed line formed by the displacement and axial coordinates is called the drum curve. When the drum coupling is used, the drum curve reflects the corresponding geometric parameters.
What are the requirements of the drum profile for the use of the drum coupling?
The drum curve is mostly a circular arc or three circular arcs. These circles are called drum circles. In the arc drum curve, the center of the drum circle is on the axis of the gear, and there are not on the axis. There are drum circular center and tooth surface spherical center overlap, there are not overlap, usually the design is based on experience, in general, drum gear coupling should meet the following requirements:
The edge contact does not occur when the Angle between axes is at its maximum. The smaller the concentrated load on the teeth, the better, and the curvature of the tooth surface is proportional to the tympanite PI, so the tympanite circle radius is as large as possible. Because the radius of curvature of the drum curve is proportional to the thinning of the inner tooth on one side, the radius of the drum circle should be as large as possible.
The radius of curvature of the drum curve is directly proportional to the thinning amount of the internal teeth, that is to say, it is related to the meshing clearance of the teeth. If the thinning amount is insufficient, it may cause certain interference, but if the thinning amount is too large, it will weaken the strength of the teeth and cause too much backlash.
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