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.

Claims

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.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0042] These and other aspects of the invention will be apparent from and elucidated with reference to the embodiments described hereinafter.

[0043] FIG. 1 is a perspective view of a divided housing with a rotor assembly in an inserted, operational position;

[0044] FIG. 2 is a perspective view of a divided housing with a rotor assembly in an insertion position and an opened housing cap;

[0045] FIG. 3 is a schematic top view of a divided housing with a rotor assembly in an inserted position and with a removed housing cap;

[0046] FIG. 4 is a perspective view of a section of a housing body with a removed housing cap; and

[0047] FIG. 5 is a perspective view of a divided housing with a rotor assembly in an insertion position and an opened housing cap.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0048] The following description of the embodiments of the present invention is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. The following description is provided herein solely by way of example for purposes of providing an enabling disclosure of the invention, but does not limit the scope or substance of the invention.

[0049] In a divided housing 1 of a spinning machine, a rotor assembly 2 is arranged as shown in FIG. 1. The housing 1 is built by a housing body 8 and a housing cap 7 fixed to the housing body 8 by screws 22. The housing 1 comprises two sections.

[0050] The first section is a rotor section 6 built by the housing body 8 as well as a housing lid 23, and the rotor section 6 is provided to enclose a spinning rotor 3 rotatably mounted to a rotor shaft 4. The housing lid 23 is pivotally mounted to the housing body 8 and can be opened to access the spinning rotor 3. The second section is a bearing section 7 built by the housing body 8 as well as by the housing cap 9. The bearing section 7 is provided for fixing the rotor shaft 4 via rotor shaft bearings 5 to the housing 1.

[0051] On an end of the rotor shaft 4 opposing the spinning rotor 3, the end section of the rotor shaft 4 is provided as a belt roller 13 for driving the spinning rotor 3 via the rotor shaft 4 by a drive belt of the spinning machine. Accordingly, the belt roller 13 is arranged outside of the housing 1.

[0052] As shown in FIG. 2, the housing cap 9 has to be removed before inserting the rotor assembly 2 into the housing 1 and more precisely, into the housing body 8 with an open part 10 in the bearing section 7. The housing 1 has to be opened first, because the rotor assembly 2 is fixed into the closed housing 1 in a press-fit manner. To allow for such a press-fit arrangement, on the outer surface 21 of the rotor shaft bearings 5 an elastic rubber element is arranged as a resilient mounting element 14, which is slightly compressed during closing the housing cap 9. To allow an easy insertion of the rotor assembly 2, the housing 1 is divided in the bearing section 7 precisely in the middle, wherein both the inner surface 15 of the housing body 8 as well as the inner surface of the housing cap 9 have the shape of a half-cylinder (see FIGS. 4 and 5).

[0053] The housing 1 has a cylindrical shape, wherein the rotor section 6 has a larger diameter than the bearing section 7. At one end of the housing 1 in the rotor section 6, a first opening 11 is provided for inserting the rotor assembly 2 into the housing 1 as well as to supply fiber material to the spinning rotor 3 during operation of the rotor spinning machine. On the other end of the housing 1, a second smaller opening 12 is provided to allow the end of the rotor shaft 4 comprising the belt roller 13 to protrude from the housing 1 and to interact, in particular to be driven, by a drive belt.

[0054] To be able to precisely align the rotor assembly 2 in the housing 1, in particular in the bearing section 6 of the housing 1, two pins 16 are arranged protruding from the inner surface 15 of the housing body 8 (see FIG. 4). After inserting the rotor assembly 2 into the housing 1, the rotor assembly 2 is aligned, in particular with regard to the axial direction of the rotor shaft 4, utilizing an adjustment jig. When closing the housing cap 9, the pins 16 exert a particularly high pressure on the surface of the rotor assembly 2 and prevent any further movement, in particular shifting along the axial direction or rotation along the rotational axis. To allow an easy insertion as well as alignment of the rotor assembly 2, the rotor assembly 2 and the inside of the housing 1 are built with a rotational symmetry.

[0055] To ensure a safe alignment of the housing cap 9 to the housing body 8 as well as to avoid any rotation of the housing cap 8 during closing the housing 1, on the contact areas 17 of the housing body 8 to be brought in contact with the contact areas 18 of the housing cap 9 when closing the housing 1, two alignment pins 19 are provided (see FIG. 3). Each of the alignment pins 19 is arranged on one contact area 17 of the housing body 8, diagonally opposing one another. In the contact areas 18 of the housing cap 9, in corresponding positions alignment openings 20 are arranged for receiving the alignments pins 19. To close the housing 1, the housing cap 9 is first placed on the housing body 8 so that the alignment pins 19 are arranged inside the alignment openings 20 of the housing body 8. Afterwards, the crews 22 are inserted and tightened.

LIST OF REFERENCE SIGNS

[0056] 1 divided housing [0057] 2 rotor assembly [0058] 3 spinning rotor [0059] 4 rotor shaft [0060] 5 rotor shaft bearing [0061] 6 rotor section [0062] 7 bearing section [0063] 8 housing body [0064] 9 housing cap [0065] 10 open part [0066] 11 first opening [0067] 12 second opening [0068] 13 belt roller [0069] 14 resilient mounting element [0070] 15 inner surface [0071] 16 pin [0072] 17 contact area [0073] 18 corresponding contact area [0074] 19 alignment pin [0075] 20 alignment opening [0076] 21 outer surface [0077] 22 screw [0078] 23 housing lid

[0079] It will therefore be readily understood by those persons skilled in the art that the present invention is susceptible of broad utility and application. Many embodiments and adaptations of the present invention other than those herein described, as well as many variations, modifications and equivalent arrangements, will be apparent from or reasonably suggested by the present invention and the foregoing description thereof, without departing from the substance or scope of the present invention. Accordingly, while the present invention has been described herein in detail in relation to its preferred embodiment, it is to be understood that this disclosure is only illustrative and exemplary of the present invention and is made merely for purposes of providing a full and enabling disclosure of the invention. The foregoing disclosure is not intended or to be construed to limit the present invention or otherwise to exclude any such other embodiments, adaptations, variations, modifications and equivalent arrangements.