| 摘要 |
PCT No. PCT/DK94/00126 Sec. 371 Date Nov. 30, 1995 Sec. 102(e) Date Nov. 30, 1995 PCT Filed Mar. 25, 1994 PCT Pub. No. WO94/23207 PCT Pub. Date Oct. 13, 1994A hydraulic machine is disclosed, with an annular gear with internal teeth and, eccentrically mounted in the annular gear, a gearwheel with external teeth which engage with the internal teeth, the internal teeth comprising one more tooth than the external teeth and the contour of the external teeth being formed by an envelope of a system of generating circles, the midpoints of which lie on a trochoid which, as a rolling circle rolls without slipping on a base circle, can be generated by the movement of a point lying on a radial ray of the rolling circle co-rotating with the rolling circle. A method of producing the contour of a rear wheel of such a machine is also disclosed. In such a machine it is desirable to realize a satisfactory inner seal and low Hertzian stresses. To that end, the spacing of the point from the midpoint of the rolling circle is larger than the radius of the rolling circle. The tooth form can then be formed by the end points of a system of line segments which are located at right angles to the trochoid and are the same length as the radii of the generating circles, wherein the trochoid encloses a closed inner face and separates it from an outer face and several intermediate faces, and the line segments are, arranged only in the inner face.
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