JP3079279U - Spindle bearing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spindle bearing device having a neck bearing 11 and a foot step shaft 12 in a bearing inner casing 13 surrounded by a bearing outer casing 14, particularly for a ring spinning machine and a twisting machine. In, this,
The spring resilience in the radial direction of the spindle is improved in such a way that it can be obtained with lower structural costs and less space than before. A bearing inner casing has a lower end.
The bearing outer casing 14 has an extended bush 17 or a bottom opening 3 whose diameter is reduced at its bottom 16.
3, the shaft pin portion 15 of the bearing inner casing 13 is locked in the extension bushes 17, 23 of the bearing outer casing 14 or in the bottom opening 33, and the bearing inner casing 13 is fixed within the bearing outer casing 14. It is mounted so that it can swing freely with the moment strength of

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a spindle bearing device for a ring spinning machine and a twisting machine, in particular, having a neck bearing and a foot step bearing in a bearing inner casing surrounded by a bearing outer casing.

[0002]

[Prior art]

 In particular, in the case of a spindle bearing device for a ring spinning machine and a twisting machine, a vibration which always acts in a radial direction during high-speed rotation occurs, so that a corresponding damping device must be provided. Conventionally, for this reason, spindle bearing devices generally have a radially acting spring at the top. In a known manner without this spring, a bearing inner casing and a bearing outer casing are connected via plugs to a spring-elastic tapered region, as shown, for example, in DE-OS 40 36 353 A1. ing. However, in this method, the structure of the bearing device becomes very long.

[0003]

[Problems to be solved by the invention]

 The object of the present invention is to improve a spindle bearing device of the type described at the outset in such a way that the spring resilience in the radial direction of the spindle can be obtained at a lower structural cost and with less space required than before. is there.

[0004]

[Means for Solving the Problems]

 According to the present invention, in a spindle bearing device of the type described at the outset, a bearing inner casing has a shaft pin portion at its lower end, and a bearing outer casing has a reduced diameter extension bush or bottom opening at its bottom. The shaft pin portion of the bearing inner casing is locked in the extension bush or the bottom opening of the bearing outer casing, so that the bearing inner casing can swing freely with a predetermined moment strength in the bearing outer casing. It is solved by being attached.

[0005] This reduces the structural length of the spindle bearing device. By eliminating the spring-elastic plugs known from DE-OS 40 36 353, the construction length of the spindle is reduced. The joint between the bearing inner casing and the bearing outer casing acts like a hinge joint in which the bearing inner casing can swing about it in the bearing outer casing.

The bearing inner casing and especially the bearing outer casing have a very thin bottom. This allows the thin bottom to act like a diaphragm. The thickness and shape of the thin bottom gives rise to the desired radial spring stiffness of the neck bearing. The thin bottom is thus designed in such a way that it obtains the desired neck bearing stiffness together with the flexibility of the shaft pin of the bearing inner casing.

[0007] In order to make it inexpensive to manufacture, the shaft pin part of the bearing inner casing is press-fitted or screwed into an extension bush of the bearing outer casing.

To facilitate assembly and disassembly, the shaft pin of the bearing inner casing extends through the bottom opening of the bearing outer casing and has external threads into which nuts are screwed.

In order to facilitate the centering of the bearing inner casing in the bearing outer casing, an extension bush of the bearing outer casing has a constricted portion, and the constriction has a centering device for the bearing inner casing. An annular thick section with a male thread follows to secure the.

[0010] For the same reason, a nut provided with a point-like raised portion is screwed on the annular thick portion with an external thread, or the nut is screwed, and between the nut and the bearing outer casing, A ring with point ridges is arranged. When the nut is tightened, the point-like ridge is pressed against the bottom of the outer casing of the bearing, whereby the extension bush of the outer casing of the bearing is pushed sideways, and the inner casing of the bearing is inclined.

In order to improve the vibration damping action, a damping medium is placed between the bearing inner casing and the bearing outer casing.

[0012]

[Embodiment of the invention]

 Hereinafter, embodiments of a spindle bearing device according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows a spindle bearing device 10 including a neck bearing 11 and a foot step bearing 12. The spindle bearing device 10 has a bearing inner casing 13, which is surrounded by a bearing outer casing 14. The bearing inner casing 13 has a shaft pin 15 at the lower end. The bearing outer casing 14 has an extended bush 17 having a reduced diameter at the bottom 16, into which the shaft pin 15 is press-fitted. The manufacturing technique for this is very simple. The bottom 16 of the bearing outer casing 14 and the bottom 18 of the bearing inner casing 13 are formed as very thin bottoms. The thin bottoms 16, 18 act as diaphragms or universal joints. Due to the flexibility of the thin bottoms 16, 18 and the shaft pin portion 15, the bearing inner casing 18 can be elastically deformed in the radial direction together with the neck bearing 11 and the foot step bearing 12. The thickness and shape of the thin bottoms 16, 18 determine the desired radial spring stiffness. Between the bearing outer casing 14 and the bearing inner casing 13 a damping medium 19 is provided which has the purpose of additionally reducing radial vibrations.

FIG. 2 shows a different coupling system between the bearing outer casing 20 and the bearing inner casing 21. The bearing inner casing 21 has an externally threaded shaft pin 22 at its lower end. The bearing outer casing 20 has a reduced-diameter extension bush 23 with a female thread at the lower end thereof. The bearing inner casing 21 is screwed and connected to the bearing outer casing 20 by screws.

FIG. 3 shows a bearing inner casing 30 having a male threaded shaft pin 31 at the lower end. The bearing outer casing 32 has an opening 33 at its lower end. The bearing inner casing 30 and the bearing outer casing 32 are connected to each other by a shaft pin 31 guided through the opening 33 and a nut 34 screwed into the shaft pin 31 from outside.

FIG. 4 shows a bearing outer casing 40 in which an annular thick portion 41 is provided on an extension bush whose diameter is reduced. A nut 42 is screwed onto the annular thick portion 41. Between the nut 42 and the bottom 43 of the bearing outer casing 40, a ring 44 having a point-like ridge 45 is arranged. When the nut 42 is tightened, the point-like ridge 45 of the ring 44 is pressed against the bottom 43 of the outer bearing casing 40, which pushes the annular thick part 41 sideways, thereby causing the bearing inner casing 46 to move in the desired direction. Incline. In this way, the centering of the bearing inner and outer casings 40 and 46 is easily realized.

[Brief description of the drawings]

FIG. 1 is a sectional view of a first embodiment of a spindle bearing device according to the present invention.

FIG. 2 is a cross-sectional view of a second embodiment of a joint portion between a bearing inner casing and a bearing outer casing.

FIG. 3 is a cross-sectional view of a third embodiment of a joint between a bearing inner casing and a bearing outer casing.

FIG. 4 is a cross-sectional view of a spindle bearing device according to a fourth embodiment of a joint between a bearing inner casing and a bearing outer casing.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Spindle bearing device 11 Neck bearing 12 Foot step bearing 13, 21, 30, 46 Bearing inner casing 14, 20, 32, 40 Bearing outer casing 15, 22, 31, 41 Shaft pin 16 Bottom of bearing outer casing 18 Bearing inner casing Bottom 33 bottom opening 41 annular thick part 44 ring 45 point-like ridge

Claims (7)

[Utility model registration claims] 1. A ring spinning machine and a twisting machine, comprising a neck bearing (11) and a foot step bearing (12) in a bearing inner casing (13) surrounded by a bearing outer casing (14). In the spindle bearing device of the above, the bearing inner casing (13) has a shaft pin portion (15) at its lower end (18), and the bearing outer casing (14) has a reduced diameter extension bush (17) at its bottom (16). ) Or bottom opening (33) so that the shaft pin (15) of the bearing inner casing (13) is engaged in the extension bush (17, 23) of the bearing outer casing (14) or in the bottom opening (33). A spindle shaft which is stopped and the bearing inner casing (13) is swingably mounted with a predetermined moment strength in the bearing outer casing (14). Receiving device. 2. A bearing inner casing (13, 21, 3).
0,46) and especially the bearing outer casing (14,2).
0, 32, 40) with a very thin bottom (16, 18, 2)
The spindle bearing device according to claim 1, wherein the spindle bearing device has (1, 43). 3. The bearing inner casing (13, 21), wherein the shaft pin portion (15) is provided with a bearing outer casing (14, 20).
Press-fit into the extension bush (17, 23) of
3. The spindle bearing device according to claim 1, wherein the spindle bearing device is screwed. 4. A shaft pin portion (31) of a bearing inner casing (30) is connected to a bottom opening (3) of a bearing outer casing (32).
A spindle bearing device according to any one of the preceding claims, characterized in that it has an external thread which extends through 3) and into which the nut (34) is screwed. 5. The extension bush of the bearing outer casing (40) has a constriction, into which an externally threaded annular thick part (41) for fixing a centering device to the bearing inner casing (46). The spindle bearing device according to any one of claims 1 to 4, wherein the following is continued. 6. A nut with a point-like raised portion or a nut (42) is screwed onto the externally threaded annular thick portion (41), and the nut (42) and the bearing outer casing (40) are screwed. ) And a point-like ridge (45)
Spindle bearing device according to claim 5, characterized in that a ring (44) with is arranged. 7. A bearing inner casing (13, 21, 3).
0, 46) and the outer casing of the bearing (14, 20, 32,
7. The spindle bearing device according to claim 1, wherein a damping medium (19) is disposed between the spindle bearing device and the spindle bearing device.