Divided housing with a rotor assembly of a rotor spinning machine and method for installing a rotor assembly in a housing of a rotor spinning machine

Abstract

A divided housing with a rotor assembly of a rotor spinning machine and a method for installing the rotor assembly in the divided housing of the rotor spinning machine. To propose a housing with a rotor assembly of a rotor spinning machine which allows a particular precise adjustment of the spinning rotor position, in particular in an axial direction of the rotor shaft, and which significantly reduces the forces due to vibrations or imbalances and accordingly reduces the wear of the rotating parts and in particular the rotor shaft bearing substantially, the divided housing with a rotor assembly has a rotor assembly with a spinning rotor, a rotor shaft and at least one rotor shaft bearing, and the divided housing has a rotor section and a bearing section, the rotor section surrounding the spinning rotor and the bearing section enclosing at least a part of the rotor shaft as well as at least one rotor shaft bearing, wherein in the bearing section the housing is at least partially divided parallel to a longitudinal housing axis into two separate parts, the first part being a housing body extending over the rotor section as well as the bearing section and the second part being a housing cap closing an open part of the housing body in the bearing section.

What is claimed is: 
     
         1 . A divided housing with a rotor assembly of a rotor spinning machine, wherein the rotor assembly comprises a spinning rotor, a rotor shaft and at least one rotor shaft bearing and wherein the divided housing comprises a rotor section and a bearing section, the rotor section surrounding the spinning rotor and the bearing section enclosing at least a part of the rotor shaft as well as at least one rotor shaft bearing,
 characterized in that   in the bearing section, the divided housing is at least partially divided parallel to a longitudinal housing axis into two separate parts,   the first part being a housing body extending over the rotor section as well as the bearing section and   the second part being a housing cap closing an open part of the housing body in the bearing section.   
     
     
         2 . The divided housing according to  claim 1 , characterized in that all rotor shaft bearings of the rotor assembly are arranged in the bearing section of the divided housing and/or that the housing cap extends over the full length of the bearing section. 
     
     
         3 . The divided housing according to  claim 1 , characterized in that the bearing section of the housing is divided along a plane arranged through the longitudinal axis of the rotor shaft inside the divided housing. 
     
     
         4 . The divided housing according to  claim 1 , characterized in that the bearing section of the housing is divided in the middle, the housing cap forming one half of the housing in the bearing section and the housing body forming the other half. 
     
     
         5 . The divided housing according to  claim 1 , characterized in that the rotor section of the divided housing is only formed by the housing body, surrounding the spinning rotor of the installed rotor assembly over 360° and/or the housing body encloses the rotor assembly in the bearing section only over 180°. 
     
     
         6 . The divided housing according to  claim 1 , characterized in that the housing has one opening in each of the rotor section and of the bearing section, the spinning rotor being accessible through one of the openings and/or an end of the rotor shaft is built as a belt roller protruding through the other of the openings. 
     
     
         7 . The divided housing according to  claim 1 , characterized in that the rotor assembly comprises at least one resilient mounting element for compensating vibrations of the rotor assembly, wherein each resilient mounting element is arranged between the rotor shaft bearing and the divided housing in the bearing section. 
     
     
         8 . The divided housing according to  claim 1 , characterized in that the diameter of the resilient mounting element is larger than the diameter of the part of the housing accommodating the resilient mounting element, so that the resilient mounting element is compressed into a press-fit during closing of the housing cap. 
     
     
         9 . The divided housing according to  claim 1 , characterized in that the divided housing is provided to fix the rotor assembly by press-fit between the resilient mounting element and the housing body from one side as well as the housing cap from the other side. 
     
     
         10 . The divided housing according to  claim 1 , characterized in that the inner surface of the housing body and/or of the housing cap provided for fixing the rotor assembly in position comprises pins and/or rings protruding from the surface for precise and firm axial positioning of the rotor assembly. 
     
     
         11 . The divided housing according to  claim 1 , characterized in that in a contact area of the housing body and/or the housing cap to be brought in contact with a corresponding contact area of the housing cap and/or the housing body at least one alignment pin per side is provided, wherein in the corresponding contact area an alignment opening for the alignment pin is provided. 
     
     
         12 . A method for installing a rotor assembly in a divided housing of a rotor spinning machine, wherein the rotor assembly comprises a spinning rotor, a rotor shaft and at least one rotor shaft bearing and wherein the divided housing comprises a rotor section and a bearing section, the rotor section surrounding the spinning rotor and the bearing section enclosing at least a part of the rotor shaft as well as at least one rotor shaft bearing, with the method comprising:
 opening the divided housing by removing a housing cap from a housing body, wherein the housing cap is at least partially dividing the divided housing in the bearing section parallel to a longitudinal housing axis into two separate parts,   inserting the rotor assembly into the opened housing in an axial direction of an installed rotor shaft of the rotor assembly, and   closing the housing cap and press-fitting the rotor assembly in the divided housing between the housing body and the housing cap in the bearing section.   
     
     
         13 . The method according to  claim 12 , characterized in that during closing the divided housing, the housing cap is applying pressure to a resilient mounting element arranged surrounding the outer surface of each of the rotor shaft bearings, compressing the resilient mounting element to a press-fit with the divided housing. 
     
     
         14 . The method according to  claim 12 , characterized in that the axial positioning of the rotor assembly is aligned utilizing an adjustment jig after inserting the rotor assembly into the divided housing and before closing the housing cap. 
     
     
         15 . A rotor spinning machine with at least one spinbox comprising a divided housing with a rotor assembly of the rotor spinning machine, wherein the rotor assembly comprises a spinning rotor, a rotor shaft and at least one rotor shaft bearing and wherein the divided housing comprises a rotor section and a bearing section, the rotor section surrounding the spinning rotor and the bearing section enclosing at least a part of the rotor shaft as well as at least one rotor shaft bearing,
 characterized in that   in the bearing section, the divided housing is at least partially divided parallel to a longitudinal housing axis into two separate parts,   the first part being a housing body extending over the rotor section as well as the bearing section and   the second part being a housing cap closing an open part of the housing body in the bearing section.   
     
     
         16 . The rotor spinning machine according to  claim 15 , wherein the rotor spinning machine has many identical spinboxes each comprising the divided housing.