GB1163631A - A Mobile Harvesting and Threshing Machine. - Google Patents

Abstract

1,163,631. Threshing machines. INTERNATIONAL HARVESTER CO. 31 March, 1967 [1 April, 1966], No. 14835/67. Heading AlF. [Also in Divisions B2 and B8] In a combined threshing and harvesting machine, the products from the threshing cylinder 15 are passed into a separating chamber having a perforated base portion 32 above which is mounted an axially reciprocating horizontal impeller 35 constituted by a rotatably cylindrical body 36 having a series of blades 43 mounted thereon in a substantially helical path, one end of each impeller-blade 43 deviating from the helical path by an angle "a" (Fig.4) so as to permit the passage of a limited quantity of crop between the blades during rotation of the impeller the upstream end of the impeller receiving the crop from the threshing mechanism whilst the downstream end constitutes the strawdischarge end. The machine comprises a main frame 12 mounted on ground-wheels 2 and towed by a drawbar 4 connected to a tractor which supplies power to the moving parts through a jointed shaft 13. The reaping mechanism is carried on a lateral assembly 6 which includes a reel 7 and cutter-bar 10. The crop is fed to a threshing cylinder 15 in the main frame which forms the lowest of three parallel rotors 15, 25, 35 arranged one above the other in a casing formed of two half-sections, the upper section 22, 33 being imperforate and the lower section 16, 21, 32 being perforated so that separated grain can pass therethrough into a collecting trough 20. Crop not passing through the concave 16 is carried by an auger 25 to the inlet end 31 of the separating chamber. The impeller 35 has a double auger-thread, one thread 41 being continuous, and the other comprising the blades 43 which have a greater radial projection than the thread 41. Both threads terminate in axial vanes 51 which project the straw through a discharge opening 52 which may be fitted with a pivoted flap to control the angle and extent of discharge. The rotor 35 is mounted in bearings 62 which permit axial receprocation under the action of face-cam 66, 67 and followers 68, 69 as the rotor revolves.