SU1376975A1 - Picking drum for farm harvesting machines - Google Patents

Abstract

The invention relates to agricultural machinery and improves the productivity and reliability of the selection process. A fixed eccentric shaft 6 is installed in the pick-up drum, the working trajectory of which consists of the semicircle DA, the curves AB and CD, representing respectively the right and left spirals of Archimedes, and the tangent sun. The driven fingers 4 are fixed in the guides 2 of the drum and the eccentric shaft by elastic springs. Such a device makes it possible to increase the maximal time of contact of the fingers with the roll mass on the semicircles DA, on the segment ABC it facilitates smooth and high-quality release of the fingers from the resilient mass, and on the CD curve - smooth selection of the fallen mass. 1 hp f-ly, 1 ill.

Description

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FIELD OF THE INVENTION The invention relates to agricultural machinery, in particular to drums of agricultural pickers.

The aim of the invention is to increase the productivity and reliability of the selection process.

The drawing shows a pick-up drum, side view, cut.

The pickup drum consists of a casing 1, forming its drum surface, evenly located on this surface tubular guides 2, which cover springs 3, pins 4 with spherical supports 5, spring-loaded springs 3, eccentrically located relative to the center of the drum shaft 6. shaft 6 has a groove 7 for sustained finger movement. The drum is provided with a slope 8 for removal of mass from its surface.

Pick drum works as follows.

The casing 1, rotating in the direction indicated by the arrow in the drawing, carries the fingers 4, which move in the guides 2 of the casing 1 and along the eccentric shaft 6 trajectory. In the section DA, the finger performs an active lifting and feeding of the grain-bearing mass, how much time is in contact with the mass. Reaching point A, the finger moves along the curve AB and the tangent of the sun, where AB is the Archimedes right spiral. Such a trajectory in conjunction with the action of the spring 3 contributes to a smooth

the deepening of a finger in the drum and its qualitative release from the grain-bearing mass. With the passage of the CD section, where the trajectory is the Archimedes left spiral, the finger makes a smooth exit beyond the surface of the rotating drum, due to which a smooth selection of the falling mass is carried out. In this way, the pickling of the picker by the grain mass is eliminated due to the quality of cleaning the fingers, and the reliability of the lifting process and feeding of the weight by the pick-up fingers is increased by increasing the contact time of the fingers with the weight.

Claims (2)

1. Pickup drum for agricultural harvesting machines, containing driven fingers with sockets on the drum surface and an eccentric shaft, characterized in that, in order to increase the productivity and reliability of the selection process, the sockets are made in the form of tubular guides fixedly mounted on the surface the drum, and the fingers are provided with spring-loaded spherical supports for engagement with the shaft. 2. A drum according to claim 1, characterized in that the shaft profile in cross section is made in the form of a semicircle, conjugate with the right and left spirals of Archimedes, connected by a common tangent to them.