JP3035394B2 - Spinning or twisting spindle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

The present invention is a spinning or twisting spindle comprising a spindle shaft supported in a spindle bearing box by a brim bearing and a thin bearing, wherein the spindle bearing box is connected to an outer housing below the thin bearing.
Carried by a coupling element, said outer housing at a distance enclosing the spindle bearing housing and comprising means for attachment to a spindle rail , said coupling element being spring resiliently flexible against bending. The invention relates to a spinning or twisting spindle having a cross-section reduction forming an area.

Although modern machines and manufacturing methods can produce spindles or twisted spindles and their bearings with high precision, noise problems occur at spindle speeds above about 17000 rpm. It is the rolling element of the collar bearing that is considered as the essential noise source at that time.
Vibrations at the collar bearings are transmitted as object noise through the spindle bearing housing, spindle flange and spindle rail to large mechanical elements, which convert the mechanical vibrations into sound. This is known from DE-C 2749 38
9 also applies to spindles of the type mentioned at the outset. In this configuration, a bearing housing is provided which receives the collar bearing and the complete thin bearing (radial and axial bearing elements) and thus also retains the entire spindle in the axial direction. The bearing housing has this structure,
It is located directly below the collar bearing at the upper end of the intermediate pipe which otherwise encloses the bearing housing. The intermediate pipe is connected at its lower end with its lower end to the lower end of the outer bearing housing via a connecting element, this bearing housing being provided with means for attachment to the spindle rail and surrounding the intermediate pipe. In. In one embodiment,
The bottom has a constriction to form a spring resilient part for bending. On the other hand, the intermediate spaces between the bearing housing and the intermediate pipe and between the intermediate housing and the outer bearing housing communicate with each other through openings and are filled with oil, but this oil surface is filled with the outer bearing housing. Is over half of the height. The oil should dampen the vibration of the spindle and thus improve the rotational quality of the spindle. No acoustic reduction measures are taken with this spindle.

It is an object of the present invention to configure a spinning or twisting spindle of the type described at the outset in such a way that noise problems are clearly improved.

[0004] The purpose of this is that the reduced section is configured as a discontinuity which limits the transmission of object sound, said discontinuity being in terms of the bending strength under radial loading on the collar bearing of 70 N /.
It has a spring constant of mm~300N / mm, and <br/> speed of sound in the middle space between the spindle bearing housing spindle bearing housing and the outer housing that is separated from the interior of 5
This is achieved by the presence of a medium that is equal to or less than 00 m / s.

Since the sound transmission is already severely interrupted in the spindle bearings due to the discontinuities, the high-frequency vibrations, which subsequently become acoustic, are only slightly transmitted to the outer housing and therefrom to the spindle rails and other mechanical parts. In addition, the outer housing itself blocks the sound emitted from the spindle bearing box. In so doing, it is also provided that there is no medium in the intermediate space between the spindle bearing housing and the outer housing that can transmit object sounds to a considerable extent.

The narrowing in the connecting element, which exists in the case of the known construction according to DE-C 27 49 389, does not function as a discontinuity which limits the object sound to a considerable extent. The reason is that since the intermediate space between the intermediate pipe and the outer pipe is filled with oil even in a narrow portion, the object sound is transmitted through the oil.

[0007] In another embodiment of the invention, it is provided that the intermediate space between the spindle bearing housing and the outer housing is filled with grease at least in the region of the discontinuities. Thereby, the generation of noise is further reduced. A similar effect can be obtained if the intermediate space between the spindle bearing housing and the outer housing is filled with an elastomer at least in the region of the discontinuities.

In a further embodiment of the invention, the light bearing is divided into a radial bearing element and an axial bearing element, said axial bearing element being supported by a connecting element in the axial direction. Is provided. It is thereby achieved that the spindle bearing housing is not loaded in its tubular part with tension or compression, but only with bending. Therefore, a clearer situation can be obtained for a discontinuous point.

[0009] Other features and advantages of the present invention will become apparent from the following description of embodiments, which are illustrated in the drawings.

The drawing is a partial axial sectional view of a spinning or twisting spindle according to the invention mounted on a spindle rail.

The spinning or twisting spindle comprises a spindle shaft (2) fixedly connected to the upper part of the spindle, of which only a flywheel (7) is shown, which shaft is supported in a spindle bearing box (3). Have been. Shaft support is provided by a collar bearing (4) with rolling elements, preferably rollers, by means of which the spindle shaft (2) is supported in a bearing sleeve pressed into the upper end of the spindle bearing housing (3). The lower end of the spindle shaft is supported by a light bearing having a bearing sleeve (5) as a radial bearing element, the bearing sleeve being held at its upper end by a centering sleeve (8) held in the bearing sleeve. . The light bearing is complemented by a bearing bolt (6) on which the end of the spindle shaft (2) is carried. Damping occurs between the centering sleeve (8) and the inner wall of the spindle bearing box (3)
Spiral body (9) is installed. The bearing bolt (6) is held by a coupling element (12), which is integrally formed with the spindle bearing box (3) and under which the bearings (5, 6) are mounted. At the lower end of the outer housing (14). The thick outer housing (14) is fixed at its upper end to the spindle rail (20). The outer housing (14) is provided at its upper end with an outer thread (16) on which a nut (19) is mounted. Rings (1) are provided on both sides of the spindle rail (20).
7, 18), and at least one of them has a slope, so that the spinning or twisting spindle (1)
Can be adjusted by rotating this ring, for example ring (18).

A bottom plate (1) for receiving a light bearing bolt (6) and axially supporting a damping spiral body (9).
Bottom (23) of the spindle bearing box (3) receiving the 0)
Is manufactured integrally with the connecting element (12) as described above. The connecting element (12) has a cylindrical extension (13) which is larger in diameter than the bearing housing (3),
It is press-fitted from below into an outer housing (14) surrounding the bearing housing (3) leaving an intermediate space (21). The extension (13) has an annular groove, into which the packing ring (15) is inserted. The coupling element (12) consists of a bottom (23) and an extension (13) of the spindle bearing housing (3).
And a discontinuous point (11) that greatly restricts the transmission of the object sound. In the region of this discontinuity (11), the connecting element (12) has a columnar structure, whose axial length is greater than its diameter. Due to its shape and the material selected, this strut- like part has a spring constant, preferably of the order of 100 N / mm, in the region of the discontinuity (11) during radial loading at the part of the collar bearing (4). It is formed so as to have a bending strength. Free-cutting steel is used as the material of the spindle bearing housing (3) and the connecting element.

The interior space of the bearing housing (3) is preferably filled with oil up to the upper end of the damping spiral body (9). Since the inner space is sealed outward, the oil does not reach the intermediate space (21). In the intermediate space (21), a medium that is not suitable for transmitting the object sound is contained. For example,
In the intermediate space (21) only air at atmospheric pressure is introduced. In another embodiment, the intermediate space comprises a medium that cannot transmit object sound to any significant extent, preferably about two times its height.
/ 3 is provided. Particularly suitable in this case is filling with grease. However, elastomers having such properties are also suitable.

The outer housing (14) is formed such that it has a much higher mass than the spindle bearing housing (3). To that end, it is provided that its wall thickness is at least four times the wall thickness of the spindle bearing housing (3). In addition, it is provided that the axial moment of inertia of the outer housing (14) is greater than the axial moment of inertia of the spindle bearing housing (3), preferably approximately ten times greater.

[Brief description of the drawings]

FIG. 1 is a partial axial sectional view of a spinning or twisting spindle according to the invention mounted on a spindle rail.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Spindle 2 Spindle shaft 3 Spindle bearing box 4 Collar bearing 5 Light bearing 11 Discontinuous point 12 Connecting element 14 Outer housing 20 Spindle rail 21 Intermediate space

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hans Braksmeier, Germany 7334 Sussen, Ho Henneufenstraße 10 (72) Inventor Gerd Starlecker, Germany 7332 Eislingen, Auf, Dell, Ebene 30 (56) References JP-A-47-19130 (JP, A) JP-A-3-193393 (JP, A) JP-A-3-161527 (JP, A) JP-A-3-193930 (JP, A) U.S. Pat. No. 5,2011,070 (US, A) U.S. Pat. No. 2,169,587 (US, A) West German Patent Application Publication 2749389 (DE, A1) (58) Fields investigated (Int. Cl. ⁷ , DB name) D01H 7/04-7 /twenty two

Claims (7)

(57) [Claims] 1. A spinning or twisting spindle comprising a spindle shaft supported in a spindle bearing box by a brim bearing and a light bearing, said spindle bearing box being connected to a connecting element in an outer housing below the light bearing.
The outer housing is supported by a spindle bearing box
And the spindle rail
A spinning or twisting spindle having a reduced cross-section that forms a spring-elastic flexible region with respect to bending , said coupling element comprising a mounting means , wherein said reduced-cross-section restricts object sound transmission. (11), which has a spring constant of 70 N / mm to 300 N / mm with respect to the bending strength under radial loading on the collar bearing, and the spindle bearing housing (3) and the outer Spindle bearing box (3) between housing (14 )
A spinning or twisting spindle, characterized in that a medium whose sound speed is 500 m / s or less is present in an intermediate space (21) separated from the inside of the spinning or twisting yarn. 2. Spinning or twisting spindle according to claim 1, wherein the connecting element (12) is made in one piece with the spindle bearing housing (3). 3. The spinning or twisting spindle according to claim 1, wherein the reduced section has at least approximately the shape of a column , and the length is greater than its diameter. 4. The intermediate space (21) between the spindle bearing housing (3) and the outer housing (14) is filled with grease at least in the region of the discontinuities (11). A spinning or twisting spindle according to any one of claims 1 to 3. 5. Intermediate space (21) between the spindle bearing housing (3) and the outer housing (14) is filled with an elastomer at least in the region of the discontinuities (11). A spinning or twisting spindle according to any one of claims 1 to 3. 6. Spinning or twisting spindle according to claim 1, wherein the outer housing (14) has a higher moment of inertia than the spindle bearing housing (3). 7. The thin bearing is divided into a radial bearing element (5) and an axial bearing element (6), and said axial bearing element (6) is connected in the axial direction with a connecting element (1).
The spinning or twisting spindle according to any one of claims 1 to 6, supported by 2).