Separating and cleaning arrangement for a self-propelled harvester thresher
BACKGROUND OF THE INVENTION 
     The present invention relates to a separating and cleaning arrangement for a self-propelled harvester thresher. More particularly, it relates to such a separating and cleaning arrangement which has a rotor drivingly supported in a housing fixedly mounted in the machine and provided with an inlet and outlet opening. 
     Separating and cleaning arrangements of the above mentioned general type are known in the art. The rotor of a known arrangement has a casing and a rotor shaft which is surrounded by said casing and has at its both ends a bearing which supports the rotor relative to the housing. The rotor of such harvester thresher must be dismounted in the event of required repair or maintenance works or removing of a coil winder. In every such case it is necessary to dismount both the front and the rear rotor shaft bearings with their holders. This is connected with high time consumption because of adherence of the agricultural product to these parts. 
     SUMMARY OF THE INVENTION 
     Accordingly, it is an object of the present invention to provide a separating and cleaning for a self-propelled harvester thresher, which avoids the disadvantages of the prior art. 
     More particularly, it is an object of the present invention to provide a separating and cleaning arrangement for a self-propelled harvester thresher in which a rotor shaft is supported so that the bearing at one rotor shaft end can be easily removed to mount and dismount the rotor in a very simple and easy way, and at the same time the mounting and dismounting can be performed by hand and the position of the rotor during this mounting and dismounting constantly changes. 
     In keeping with these objects and with others which will become apparent hereinafter, one feature of the present invention resides, briefly stated, in a separating and cleaning arrangement for a self-propelled harvester thresher in which the bearing provided at the front end of the rotor shaft, as considered in a traveling direction, is embraced by a sleeve with a spherical outer surface, and the sleeve is supported in a holder. 
     When the harvester thresher is designed in accordance with these features, it achieves the above mentioned objects. 
     The novel features which are considered as characteristic for the invention are set forth in particular in the appended claims. The invention itself, however, both as to its construction and its method of operation, together with additional objects and advantages thereof, will be best understood from the following description of specific embodiments when read in connection with the accompanying drawing. 
    
    
     BRIEF DESCRIPTION OF THE DRAWING 
     FIG. 1 is a view showing a front part of a self-propelled harvester thresher, on a side view, without one side wall; 
     FIG. 2 is a view showing a fragment of the harvester thresher of FIG. 1, identified with X, on an enlarged scale; and 
     FIG. 3 is a view showing the fragment of FIG. 2 in a dismounted position. 
    
    
     DESCRIPTION OF A PREFERRED EMBODIMENT 
     A self-propelled harvester thresher is identified as a whole with reference numeral 1. It has a front cutting trough 2 which supplies a harvested product via an inclined conveyor 3 to a threshing arrangement. The threshing arrangement includes a threshing drum 5 which extends transversely to a traveling direction, and a threshing basket 6 which is associated with the threshing drum 5. A separating arrangement 9 is arranged downstream of the threshing arrangement 4 and operates in accordance with the principle of an axial flow. The straw which is at least partially threshed in the threshing arrangement 4 is supplied via a transferring drum 7 rotatable in clockwise direction, from above into an inlet opening 8 of the separating arrangement 9. 
     The separating arrangement 9 has a rotor which is identified as a whole with reference numeral 10 and extends in a traveling direction. The rotor has a shaft 11 which carries in its front region a conically extending casing 12. The casing 12 is provided in its conical region with pulling screw sheets 13. In its not-shown cylindrical region, the casing 12 is provided with strips 14. The rotor 10 is surrounded by a housing 15 which is provided with upper guiding and transporting ribs 16. A sieve is arranged under the same. The housing 16 is fixedly connected with a frame of the harvester thresher in its front region, for example via a traverse 17. 
     The traverse 17 has a small vertical web 18 which is welded on it. The web 18 has an end which faces away of the traverse 17 and carries a bearing cup 19. The bearing cup 19 is provided with a coating 20 of a synthetic plastic material, a soft metal or a similar material. A sleeve 21 is seated in the bearing cup 19. The sleeve 21 has a spherical outer surface which is convex outwardly and surrounds a roller bearing 22 arranged on a front end of the shaft 11 of the rotor. The position of the bearing 22 on the shaft 11 is secured by its abutment against a shoulder 24 and by a plate 26 which is tightened by a screw 25 against an end surface of the shaft 23. 
     As can be seen from FIGS. 2 and 3, the sleeve 21 has a collar-shaped projection 27 with an annularly extending groove 28. The front edge of the conically extending casing 12 engages in the groove 28 so as to provide a good sealing. The rear end of the shaft 11 is supported in a not-shown manner also in a bearing which for example is mounted on a web. After releasing the web, the bearing can be withdrawn from the shaft. Because of the formation of the bearing location in the front region of the rotor shaft, the entire rotor 10 can be withdrawn from the housing rearwardly. As shown in FIG. 3, since the sleeve 21 is spherical, it does not act in a damaging manner when during mounting or dismounting of the rotor 10 the center axes of the bearing cup 19 and the rotor 10 extend not completely coaxially, which cannot be avoided. Advantageously, the abutment point of the outer wall 29 with the bottom 30 of the annular groove is chamferred or rounded, so that the mounting of the rotor 10 is further facilitated. 
     It will be understood that each of the elements described above, or two or more together, may also find a useful application in other types of constructions differing from the types described above. 
     While the invention has been illustrated and described as embodied in a separating and cleaning device for a self-propelled harvester thresher, it is not intended to be limited to the details shown, since various modifications and structural changes may be made without departing in any way from the spirit of the present invention. 
     Without further analysis, the foregoing will so fully reveal the gist of the present invention that others can, by applying current knowledge, readily adapt it for various applications without omitting features that, from the standpoint of prior art, fairly constitute essential characteristics of the generic or specific aspects of this invention.