US2819583A

US2819583A - Oscillating sleeve for spinning spindles

Info

Publication number: US2819583A
Application number: US431178A
Authority: US
Inventors: Gassner Hans
Original assignee: Kugelfischer Georg Schaefer and Co
Current assignee: IHO Holding GmbH and Co KG
Priority date: 1954-05-20
Filing date: 1954-05-20
Publication date: 1958-01-14
Anticipated expiration: 1975-01-14

Description

1953 H. GASSNER QSCILLATING SLEEVE FOR SPINNING SPINDLES Filed May 20, 1954 2 Sheets-Sheet l Jan. 14, 1958 H. GASSNER 2,819,583

OSCILLATING SLEEVE FOR SPINNING SPINDLES Filed May 20, 1954 2 Sheets-Sheet 2 Fig.3-

a 9\ z I 4/" 5V2 /Z a N f Aw 2,819,583 OSCILLATING .SLEEVE FOR SPINNING SPINDLES Hans .Gassner, Sehweinfurt, Germany, .assignor to tKugelfischer-Georgschafer & .Co Schweiniurt, Germany Application May .20, 1954, Serial No. 431,118 7 Claims. term-+154) All of the heretofore known oscillating sleeves for spinning spindles, while comprising a plurality of component parts, have been manufactured by means ofmetalcutting operations. Moreover, in oscillating sleeves of known design there is provided in the stem or shank portion of the sleeve a longitudinal groove serving to accommodate a fiat spring.

The process of giving the said oscillating sleeves the required shape by means of cutting operations is very expensive and uneconomical, especially in cases in which the sleeve comprises a plurality of component parts. Moreover, the use of sleeves comprising several parts frequently results in such parts becoming lost or being accidentally omitted during re-assembly, for example due to the necessity of disassembling the sleeves for the purpose of changing the oil contained therein. Numerous cases have become known in which the said flat spring snapped off the sleeve during insertion of the sleeve into its housing; in many cases the absence of the said spring is detected only upon irregular operation of the spindle being observed. The absence of the driving sleeve also causes irregular running of the spindle. To a certain extent the longitudinal groove required in the oscillating sleeves of known design produces an unfavorable efiect in that no dampening action can be obtained in the groove region by the presence of grease or an oil film, all pressure thus having to be absorbed by said flat spring.

The known designs of spindle sleeves include forcingin sleeves and brake-ring sleeves made of tubular stock by means of a seamless drawing operation. However, in the case of oscillating sleeves, particularly the sleeves frequently used in cotton spinning, it has heretofore been impossible exclusively to use non-cutting forming operations, since the longitudinal groove accommodating the fiat spring serving to dampen the oscillations of the sleeve can be produced by a cutting operation only.

According to the present invention the above-mentioned deficiencies are eliminated by using an oscillating sleeve for spinning spindles which receives in its interior both the upper spindle bearing and the lower or pivot bearing of the spindle, the said oscillating sleeve being manufactured, also according to the invention, \by means of a non-cutting forming operation, the said sleeve being made of seamless tubular material and being operatively associated with a spring-biased ball in such a manner that the geometry of the tubular body of said sleeve in co-operation with said spring-biased ball tends to dampen the oscillations of the sleeve during operation. More in particular, the said dampening efiect is contributed to by the provision of portion of larger diameter at the lower end of the said oscillating sleeve. Since the oscillating sleeve according to the invention receives in its interior the upper as well as the lower bearing of the spindle, there results, in combination with the very small wall thickness of the drawn sleeve, an extremely compact an rangement; moreover the said arrangement takes theform of a self-contained assembly which may be used, if desired, to provide for internal lubrication by means ofinherently expensive s indle oil, it also being possible to immerse the external surfaces of the said assembly in ordinary lubric ting oil which contributes to the dampening of the oscill tions occurring during the operation.

In a specific embodiment of the self-contained assembly according to the invention, the "enlarged lower ,end

of the sleeve member provided for the purpose ,of dampening the "oscillations maybe closed'by a bottom ,plate, and the lower bearing ,has an .axially extending groove on its surface. It is of advantage, according .to another aspect of the invention, to provide the said groove in the lower bearing at a point diametrally opposite theaperture through which 'thelubricant is drawnin.

The said bottom plate which vcloses the enlarged portion of the lower end of the sleeve serves to define between the lower bearing and .the said bottom plate a collecting chamber for that oil which is used in the interior of the sleeve, i. e. for the spindle oil, the said chamber being adapted to serve, it necessary, as a settling chamber for any foreign matter that maybe containedin the said oil. Besides that, the construction according to the invention renders it possible .to reduce the length of the sleeve, as the aperture provided in the .lower bearing for the purpose of drawing in lubricant must debouch into the said collecting chamber, thismaking it necessary :to allow a major portion of the lower bearing toextend into the enlarged portion of the lower ,end of the sleeve.

Also according to theinvention, the lower spindlebearing, which is a press fit in the oscillating sleeve, is provided with embossed dimples adapted to engage the said lower spindle bearing in such .a matter as to prevent any axial displacement thereof. Thus, it is impossible with the arrangement according to the invention that any of the component parts of the oscillating sleeve might be lost. A particularly advantageous improvement resides in the fact that the tubular shank portion of the sleeve .is merely provided with a part-spherical recess in which there engages the aforementioned ball which, while being biased towards the said recess by a compression spring, adds to the dampening of the sleeve oscillations. By Virtue of this arrangement, practically the entire circumferential surface of the tubular sleeve shank contributes to the oil dampingetfect. Besides that, the ball engaging in the said recess prevents bearing tfriction from causing the oscillating sleeve to rotate about its axis. Moreover, the .fact that, also according to the invention, :the :said compression spring and the said ball are arranged 'in.a closed housing, .afiords an additional advantage in that no lint vis collected and that no oilcan be forced out of thespace'betweenthe saidclosedhousing and the oscillating sleeve.

Certain further features of the invention. will be .apparent from the following description taken in conjunction with the accompanying drawing. The drawing illustrates, by way of example only, two preferred embodiments of the invention, Figure 1 representing a longitudinal section of the oscillating sleeve with the spindle in position, while Figure 2 shows the arrangement ofthe oscillating sleeve within a housing, the compression spring and the ball being clearly indicated. Figure 3 illustrates a modified embodiment of the oscil lating sleeve vof the invention in which the separate oil chambers are ,formedtina particularly advantageous manner.

According to Figure 1, the oscillating sleeve is 'manufactured by expanding a length of a suitable seamless tubular material, the lower end of the sleeve 2 being adapted to produce the required dampening effect, and the upper portion of the sleeve being enlarged so as to accommodate the upper spindle bearing 3. The lower bearing 4 supporting the spindle Sis pressfitted into 'the sleeve from below and ,has dimpled portions 6 which act as additional means adapted to prevent anydisplacement of the bearing 4. .Rotation of the spindle .5 will cause the lubricant to be drawn into the hearing by way of ,the passage 7. Any excess oil may be discharged from the interior of the sleeve through a hole 8 (Figure 2) provided in the sleeve 1. By giving the oscillating sleeve a suitable shape it is possible to provide for a smooth-running spindle at the normal operating speed and for the dampening of the oscillations occurring at the critical speed of rotation under conditions of unbalance.

As will be seen in Figure 3, the oscillating sleeve 1 is mounted in known manner within the housing 9, a slight clearance 10 being provided between the sleeve and the housing; the housing 9 is supported, also in known manner, on the spindle support 14 by means of a sleeve 12 and a washer 13. Due to the above-mentioned slight clearance the oscillating sleeve 1 may oscillate within narrow limits within its housing. Arranged in a bore provided in the flange 16 of the housing is a ball 17 which is urged by a compression spring 18 into a depression 19 formed in the oscillating sleeve; this arrangement tends to improve the dampening effect produced by the suitable shape of the oscillating sleeve, since the force of the spring tends to reduce vibration considerably, while at the same time preventing the oscillating sleeve from being displaced. The spring 18 and the ball 17 are housed in a bushing 21 which is closed by a cover 20. After the spring and the ball have been inserted into the bushmg and the cover placed in position, the opening of the bushing is slightly peened over to prevent the spring from forcing the ball out of the opening.

The central portion 11 of the oscillating sleeve 1 is redticed so as to define a chamber for the dampening O1 In the embodiment illustrated in Figure 3, the lower bearing 4 extends sufliciently into the oscillation-dampening enlarged portion at the lower end of the sleeve 2 to cause the opening 7 for the drawing-in of spindle oil serving to lubricate the interior of the sleeve 2 to debouch into the collecting chamber 23 closed by the bottom plate 22. The said collecting chamber 23 is in communication with that space within the sleeve 1 which is located above the lower bearing 4, this communication being provided by the groove 24 which extends in an axial direction on the surface of the lower bearing 4 and is located diametrally opposite the opening 7 for the drawing-in of lubricant.

In the two hereinbefore described embodiments the oil circulates in the same manner in the lower bearing. The lubricant is drawn in through passage 7, then ascends along the spindle and subsequently overflows to be returned via bore 8 in sleeve 1 and groove 24, respectively, to tlhe housing 9 and the collecting chamber 23, respective y.

In the embodiment of Figure 3 the spindle 5 in the lower bearing 4 is lubricated, because of the separation of the oil spaces by the bottom plate 22, by that lubricant only which is contained in the sleeve 1, i. e. by spindle oil, this oil being drawn in at '7 from the collecting chamber 23 and being returned to the latter via the groove 24 provided in the lower bearing 4. This makes it possible to lubricate the lower bearing 4 which high-grade specialtype oil, while the dampening of the oscillations of the enlarged lower end of the sleeve 2 within the space 15 is effected by a filling of an inexpensive machine oil distillate having a suitable viscosity. Any foreign matter contained in the spindle oil can settle in the collecting chamber 23. Besides that, the changing of the oil filling may now be done by simply pulling the oscillating sleeve out of its housing and pouring out the oil contained in the sleeve. Moreover, since the lower end of the lower bearing 4 extends into the enlarged portion at the lower end of the sleeve 2, the otherwise unused space within this enlargement, which latter has to be provided for the purpose of dampening the oscillations in co-operation with the housing 9, is utilized to good advantage.

It is a particularly important feature of the invention that the lower end of the oscillating sleeve is formed with an enlarged portion, as experience has shown that this enlargement, together with the spring force 18, is particularly effective in dampening the said oscillations. It will be appreciated from the damping that the said enlarged portion exclusively serves the purpose of dampening oscillations, not to accommodate and support the lower bearing. The force of the compression spring 18 is so balanced in relation to the enlargement of the lower end of the sleeve 2 that both the flexibility and the dampening properties of the oscillating sleeve and thus also the spindle meet all requirements as regards the passing of the critical speed as well as its operation after the normal operating speed is reached.

Of equal importance in regard to the invention as here set forth is the fact that the oscillating sleeve 1 is comprised of a single member; This construction makes it impossible during the frequently necessary removal and reinstallation of the sleeve that any parts, such as the flat spring, the compression spring, the driving sleeve, etc., are lost or omitted. All of the last-named parts can be dispensed with in the device according to the invention. In addition, the device of the invention offers the advantage that its smooth surface obviates the collection of dirt and/or lint, thus making it possible to clean the device satisfactorily and within a minimum space of time.

I claim:

1. A spindle sleeve assembly comprising a spindle sleeve formed from seamless drawn tube stock, bearings located within said sleeve, a housing about said sleeve, a ball contained in said housing, resilient means urging said ball into engagement with said sleeve, and means defined by said sleeve functioning with said ball tending to dampen vibrations of said sleeve occurring during operation.

2. An assembly as defined in claim 1, wherein said ball and said resilient means are enclosed in said housing with said ball only partly projecting from said housing and being constrained against further projection.

3. An assembly as defined in claim 1, wherein said means defined by aid sleeve includes and enlarged portion formed seamless with said sleeve at its lower end.

4. An assembly as defined in claim 1, wherein said sleeve defines a depression at the point of engagement with said ball.

5. A spindle sleeve assembly comprising a spindle sleeve, an upper and lower bearing located within said sleeve, a housing about said sleeve, an element contained in said housing and resiliently urged into engagement with said sleeve, and means defined by said sleeve functioning with said element tending to dampen vibrations of said sleeve occurring during operation, said means defined by said sleeve including an enlarged portion formed seamless with said sleeve at its end, a plate closing the bottom of the sleeve, and said lower bearing defining a radially extending bore as well as an axially extending groove in its surface.

6. An assembly as defined in claim 5, wherein said groove is located diametrically opposite from said bore.

7. An assembly as defined in claim 5, wherein said lower bearing is press-fitted into said sleeve with said lower bearing being secured in position by embossed dimples.

References Cited in the file of this patent UNITED STATES PATENTS 1,911,329 Staufert May 30, 1933 2,051,641 Magrath 1. Aug. 18, 1936 2,240,047 Marzoli Apr. 29, 1941 2,447,854 Gleitz et al Aug. 24, 1948 2,650,465 Westall Sept. 1, 1953 FOREIGN PATENTS 430,345 Italy Feb. 13, 1948 685,689 Great Britain Jan. 7, 1953 961,432 France Nov. 21, 1949 1,050,425 France Sept. 2, 1953