US3823540A - Brake for spinning and twisting spindles - Google Patents

Brake for spinning and twisting spindles Download PDF

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Publication number
US3823540A
US3823540A US00288481A US28848172A US3823540A US 3823540 A US3823540 A US 3823540A US 00288481 A US00288481 A US 00288481A US 28848172 A US28848172 A US 28848172A US 3823540 A US3823540 A US 3823540A
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shoe
spindle
brake
housing
braking surface
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US00288481A
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G Mandl
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Maschinenfabrik Rieter AG
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Maschinenfabrik Rieter AG
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H7/00—Spinning or twisting arrangements
    • D01H7/02—Spinning or twisting arrangements for imparting permanent twist
    • D01H7/04—Spindles
    • D01H7/22—Braking arrangements
    • D01H7/2208—Braking arrangements using mechanical means
    • D01H7/2225—Braking arrangements using mechanical means the braking means surrounding nearly the whole periphery of the whorl
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H7/00—Spinning or twisting arrangements
    • D01H7/02—Spinning or twisting arrangements for imparting permanent twist
    • D01H7/04—Spindles
    • D01H7/22—Braking arrangements

Definitions

  • SHEET 1 [IF 2 BRAKE FOR SPINNING AND TWISTING SPINDLES This invention relates to a brake for spinning and twisting spindles. More particularly, this invention relates to a brake for a spinning and twisting spindle supported elastically in radial direction, such as used on staple fiber spinning and twisting machines or on drawtwisting machines for processing endless filaments.
  • an open support member has been positioned in surrounding relation to a brake drum of a spindle with brake elements supported thereon in opposition to the brake drum.
  • the support member has been rigidly connected to a spindle bearing housing on a side opposite the open end.
  • the open ends of the support member have been provided with lappets inclined with respect to the spindle axis and directed downwardly and outwardly, while a yoke has been mounted in the lappets.
  • the yoke In order to brake the spindle, the yoke has been moved axially to bring the lappets together while closing the support member on the spindle in braking relation.
  • Braking devices have also been known in which a braking element or a brake shoe, supported by a flexible element connected via a lever system acting between the brake element and the connecting point, are pressed against the brake drum of a spindle whorl so that a spindle braking action is effected.
  • Brakes of this type are provided with an elastically supported brake element but show disadvantages in that the brake element can yield in only one direction to the spindle movement of an elastically supported spindle. This can permit one-sided pressures to act on the bearing so that the spindle movement would cause additional unfavorable vibrations which, again, could cause damage as mentioned above to tubes, spindle blades and whorls.
  • Braking devices which are activated by a cable arrangement, a so-called Bowden cable arrangement, wherein the cable presses a brake element against a brake drum by means of a lever arrangement so that a braking action is effected.
  • the support in which the lever arrangement and a cable sash for the cable have been supported, or fixed respectively, has been rigidly connected to the spindle rail.
  • the cable arrangement in this case, merely has had the function of permitting adjustment of the maximum braing pressure by adjusting the effective cable length.
  • the invention provides a resiliently mounted spindle with a brake which is also resiliently mounted on a bearing housing for the spindle.
  • the spindle bearing housing is generally secured to a spindle rail and is provided with suitable elements such as springs to elastically or resiliently mount the spindle therein.
  • the spindle in turn, is provided with a braking surface against which the brake can be pressed.
  • the brake has a clamping shoe on which brake elements are mounted in opposition to the spindle braking surface. This shoe is constructed to be pressed against the spindle braking surface upon tensioning of the shoe.
  • the shoe is resiliently connected to the spindle rail to move radially with the spindle braking surface upon pressing of the brake elements against the braking surface.
  • the tensioning of the shoe is carried out by an elastic means connected to the shoe, for example, by a Bowden cable arrangement.
  • the clamping shoe is provided with anns having reduced portions near the point of securement to the spindle bearing housing in order to be resilient of itself.
  • the clamping shoe is connected by an elastic'or resilient intermediate means to the spindle bearing housing.
  • This intermediate means can include one or more springs to effect a resilient connection or can itself be a spring member.
  • FIG. 1 illustrates a partial cross-sectional view of a radially elastically supported spindle with a brake according to the invention
  • FIG. 2 illustrates a plan view of the spindle and brake of FIG. 1;
  • FIG. 3 illustrates a modified resilient connection using a spring between a clamping shoe and a bearinghousing according to the invention
  • FIG. 4 illustrates a further modified resilient connection using a pair of springs between a clamping shoe and a bearing housing according to the invention
  • FIG. illustrates a further modified resilient connection between a clamping shoe and a bearing housing according to the invention
  • FIG. 6 illustrates a plan view of the connection of FIG. 3
  • FIG. 7 illustrates a plan view of the connection of FIG. 4.
  • FIG. 8 illustrates a plan view of the connection of FIG. 5.
  • a spindle rail 1 disposed, for example, on a spinning and twisting frame or a drawtwister, provides a support for a non-rotatable envelope tube 2 into which a spindle 3 is rotatably mounted.
  • the spindle rail 1 has a spindle bearing housing 4 rigidly connected thereon by means of a cover flange 5 and screws 6.
  • the spindle bearing housing 4 and cover flange 5 are recessed as shown to secure a plurality of radially disposed springs 7 therebetween which springs 7 serve to resiliently connect the envelope tube 2 to the housing 4 and, in turn, to the rail 1.
  • the spindle 3 has a whorl 8 thereon as is known which carries a braking surface or brake drum 9 at the lower end.
  • a brake is disposed about the braking surface 9 and is formed by a clamping shoe 1] which has a pair of arms surrounding the braking surface 9 and a plurality of brake elements 10 (FIG. 2) which are secured on the shoe in opposition to the braking surface 9.
  • the arms of the shoe 11 are biased outwardly of each other relative to the spindle 3 so as to normally space the brake elements 10 from the braking surface or brake drum 9.
  • the clamping shoe 11 is connected by means of a screw 13 to a mounting angle 14 which, in turn, is fixed to a support member 15 rigidly secured on the housing 4.
  • the shoe 1] is thus nonrotatably fixed with respect to the housing 4.
  • the arms of the clamping shoe 11 are each provided with a reduced portion 12 in close vicinity to the holding screw 13. These reduced portions 12 effect a flexibility or resilient connection of the shoe 11 relative to the spindle rail 1 and housing 4.
  • the ends of the shoe arms are each provided with an arcuate portion 16 and with a slot 17 so as to take up a Bowden cable arrangement 18.
  • the Bowden cable arrangement 18 consists of a cable sash 19, a cable 20, a knob 21 held against an arcuate portion 16 of one shoe arm and of a stop 22 secured to the spindle rail 1.
  • the Bowden cable arrangement 18 is ac tivated by pulling the cable in the direction of arrow A (FIG. 1) e.g. by means of a foot pedal (not shown).
  • the clamping shoe 11 is thus closed on itself so that the braking elements 10 are pressed against the spindle braking surface 9.
  • the brake shoe 11 is kept flexible by means of the recesses 12, the brake elements 10 can follow, or take up the vibrations of the radially elastically supported spindle 3. If the spindle 3 is brought to a standstill, the cable 20 can be released again so that the brake elements 10 are lifted from the braking surface 9 by the inherent tension of the brake shoe 11.
  • the clamping shoe 23 which is similar to that described above can omit the use of reduced arm portions and instead can be connected by a spiral spring 24 and a screw 25 to the mounting angle 14.
  • the shoe 23 can move relative to the screw 25 under a biasing force of the spring 23 which presses the shoe 23 against the mounting angle 14 during travel with a spindle (not shown).
  • the spring 24 as shown is held between the head of the screw 25 and the shoe 23.
  • the clamping shoe 23 can be held between two springs 26, 27 on a screw 25. As shown, one spring 26 is held between the head of the screw 25 and the shoe 23 while the other spring 27 is held between the mounting angle 14 and the shoe 23.
  • the shoe 23 can also be connected directly to the bearing housing 5 my means of an elastic intermediate means such as by one piece spring member 28 as shown.
  • a clamping shoe with a resilient connection as shown in one of FIGS. 3 to 8 operates in the same fashion as the shoe 11 described in FIGS. 1 and 2.
  • the invention thus provides a brake which is of utmost simplicity of construction and thus low manufacturing cost. Also, the invention permits the possibility of braking elastically supported spindles quickly to a standstill from any rotational speed of the speed range, with or without a load being placed on the spindle and without any additional vibrations (as described above) being caused and, thus, without damage to the brake or to the rotating elements.
  • a spindle rail a housing secured to said spindle rail, a spindle having a braking surface thereon and being elastically supported radially in said housing, a brake including a clamping shoe having brake elements for pressing against said braking surface of said spindle upon tensioning of said shoe and being resiliently connected to said spindle rail to move radially with said braking surface upon pressing of said brake elements against said braking surface and elastic means connected to said shoe for tensioning of said shoe to press said brake elements against said braking surface on said spindle.
  • clamping shoe includes a pair of arms, each said arm having a reduced portion therein adjacent said housing for effecting a resilient relation between each said arm and said housing.
  • said elastic intermediate means includes at least one spring resiliently biasing said shoe relative to said housing.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)

Abstract

The clamping show is resiliently connected to the housing to move radially on the spindle upon braking of the elastically supported spindle by means of the brake elements on the shoe. The resilient connection can be formed by reduced portions in the arms of the shoe or by a spring member or one or more springs between the shoe and the housing.

Description

United States Patent [191 Mandl ,luly 16, 1974 [5 BRAKE FOR SPINNING AND TWISTING 2,638,733 5/1953 Haythornthwaite et al. 57/88 X L 2,975,584 3/1961 Makant et al 57/88 3,128,591 4/1964 Hammond 57/88 [75] Inventor: Gerhard Mandl, Wmterthur,
Switzerland Primary Examiner-John Petrakes [73] Assignee: Rieter Machine Works, Ltd., Attorne A em, or Firm-Ken on & Ken on Reill y 8 Y y Y Wmterthur, Switzerland Carr & Chapin [22] Filed: Sept. 13, 1972 21 Appl. No.: 288,481 [57] ABSTRACT The clamping show is resiliently connected to the [52 US. Cl. 57/88 heheihg meve radially eh the Spindle braking 51 Int. Cl D01h 7/22 of the eleeheehy ShPPeYted sPihdle by means ef the [58] Field of Search 57/88 89 hrehe elements eh the Shoe The resilient eehheehe" can be formed byreduced portions in the arms of the [56] References Cited shoe or by a spring member or one or more springs UNITED STATES PATENTS between the shoe and the housing.
2,115,268 4/1938 Klein 57/58 6 Claims, 8 Drawing Figures wimtnmuswn V 3.823.549
SHEET 1 [IF 2 BRAKE FOR SPINNING AND TWISTING SPINDLES This invention relates to a brake for spinning and twisting spindles. More particularly, this invention relates to a brake for a spinning and twisting spindle supported elastically in radial direction, such as used on staple fiber spinning and twisting machines or on drawtwisting machines for processing endless filaments.
Various braking arrangements have been known in which an open support member has been positioned in surrounding relation to a brake drum of a spindle with brake elements supported thereon in opposition to the brake drum. Generally, the support member has been rigidly connected to a spindle bearing housing on a side opposite the open end. In addition, the open ends of the support member have been provided with lappets inclined with respect to the spindle axis and directed downwardly and outwardly, while a yoke has been mounted in the lappets. In order to brake the spindle, the yoke has been moved axially to bring the lappets together while closing the support member on the spindle in braking relation.
In such a braking arrangement, the support member has been held rigidly in place on one side by the rigid connection with the bearing housing and on the other side by the rigidly guided yoke. Thus, the geometric axis of the support member always remains in the same fixed position. Other braking arrangements have also been known in which a support member has been activated by a pin provided with cams acting between radial lappets which extend from the open ends of the support member to effect opening or closing of the support member. However, in these cases also, the geometric axes of the brake support members always remain fixed in the same position with respect to thespindle bearing housing.
While these above braking arrangements do not present disadvantages for rigidly supported spindles they do present a problem for spindles which operate at high rotation speeds and are flexibly or resiliently supported. As a result, these resiliently mounted spindles do not rotate about their geometric axes since they are subject to high-frequency relative movements in addition to their pure rotational movement. The use of brakes of the aforementioned type, i.e. brakes with a rigid geometric axis on elastically or resiliently supported spindles, shows a marked disadvantage in that great forces are generated during the braking action as the axes of the brake and of the spindle do not coincide during operation. Thus, damage to tubes, spindle blades, whorls and/or to brake elements can be caused.
Braking devices have also been known in which a braking element or a brake shoe, supported by a flexible element connected via a lever system acting between the brake element and the connecting point, are pressed against the brake drum of a spindle whorl so that a spindle braking action is effected. Brakes of this type are provided with an elastically supported brake element but show disadvantages in that the brake element can yield in only one direction to the spindle movement of an elastically supported spindle. This can permit one-sided pressures to act on the bearing so that the spindle movement would cause additional unfavorable vibrations which, again, could cause damage as mentioned above to tubes, spindle blades and whorls.
Braking devices have also been known which are activated by a cable arrangement, a so-called Bowden cable arrangement, wherein the cable presses a brake element against a brake drum by means of a lever arrangement so that a braking action is effected. The support in which the lever arrangement and a cable sash for the cable have been supported, or fixed respectively, has been rigidly connected to the spindle rail. The cable arrangement, in this case, merely has had the function of permitting adjustment of the maximum braing pressure by adjusting the effective cable length. Thus, in spite of a flexible cable arrangement, the disadvantages prevail, namely that the brake element cannot yield to the radial movement of an elastically supported spindle, which again would cause the damages already mentioned.
Accordingly, it is an object of the invention to permit a brake for a resiliently mounted spindle to yield to the radial movements of the spindle during braking.
It is another object of the invention to maintain the geometric axes of a resiliently mounted spindle and a surrounding brake in substantial coincidence during braking.
It is another object of the invention to avoid the generation of large eccentric forces between a resiliently mounted spindle and a brake during braking.
It is another object of the invention to reduce wear between a brake and a resiliently mounted spindle.
Briefly, the invention provides a resiliently mounted spindle with a brake which is also resiliently mounted on a bearing housing for the spindle. The spindle bearing housing is generally secured to a spindle rail and is provided with suitable elements such as springs to elastically or resiliently mount the spindle therein. The spindle, in turn, is provided with a braking surface against which the brake can be pressed. The brake has a clamping shoe on which brake elements are mounted in opposition to the spindle braking surface. This shoe is constructed to be pressed against the spindle braking surface upon tensioning of the shoe. In addition, the shoe is resiliently connected to the spindle rail to move radially with the spindle braking surface upon pressing of the brake elements against the braking surface. The tensioning of the shoe is carried out by an elastic means connected to the shoe, for example, by a Bowden cable arrangement.
In one embodiment, the clamping shoe is provided with anns having reduced portions near the point of securement to the spindle bearing housing in order to be resilient of itself.
In another embodiment, the clamping shoe is connected by an elastic'or resilient intermediate means to the spindle bearing housing. This intermediate means can include one or more springs to effect a resilient connection or can itself be a spring member.
These and other objects and advantages of the invention will become more apparent from the following detailed description and appended claims taken in conjunction with the accompanying drawings in which:
FIG. 1 illustrates a partial cross-sectional view of a radially elastically supported spindle with a brake according to the invention;
FIG. 2 illustrates a plan view of the spindle and brake of FIG. 1;
FIG. 3 illustrates a modified resilient connection using a spring between a clamping shoe and a bearinghousing according to the invention;
FIG. 4 illustrates a further modified resilient connection using a pair of springs between a clamping shoe and a bearing housing according to the invention;
FIG. illustrates a further modified resilient connection between a clamping shoe and a bearing housing according to the invention;
FIG. 6 illustrates a plan view of the connection of FIG. 3;
FIG. 7 illustrates a plan view of the connection of FIG. 4; and
FIG. 8 illustrates a plan view of the connection of FIG. 5.
Referring to FIG. 1, a spindle rail 1 disposed, for example, on a spinning and twisting frame or a drawtwister, provides a support for a non-rotatable envelope tube 2 into which a spindle 3 is rotatably mounted. The spindle rail 1 has a spindle bearing housing 4 rigidly connected thereon by means of a cover flange 5 and screws 6. The spindle bearing housing 4 and cover flange 5 are recessed as shown to secure a plurality of radially disposed springs 7 therebetween which springs 7 serve to resiliently connect the envelope tube 2 to the housing 4 and, in turn, to the rail 1. The spindle 3 has a whorl 8 thereon as is known which carries a braking surface or brake drum 9 at the lower end. A brake is disposed about the braking surface 9 and is formed by a clamping shoe 1] which has a pair of arms surrounding the braking surface 9 and a plurality of brake elements 10 (FIG. 2) which are secured on the shoe in opposition to the braking surface 9. The arms of the shoe 11 are biased outwardly of each other relative to the spindle 3 so as to normally space the brake elements 10 from the braking surface or brake drum 9.
Referring to FIGS. 1 and 2, the clamping shoe 11 is connected by means of a screw 13 to a mounting angle 14 which, in turn, is fixed to a support member 15 rigidly secured on the housing 4. The shoe 1] is thus nonrotatably fixed with respect to the housing 4. In addition, the arms of the clamping shoe 11 are each provided with a reduced portion 12 in close vicinity to the holding screw 13. These reduced portions 12 effect a flexibility or resilient connection of the shoe 11 relative to the spindle rail 1 and housing 4. At the open side of the clamping shoe 11, the ends of the shoe arms are each provided with an arcuate portion 16 and with a slot 17 so as to take up a Bowden cable arrangement 18. The Bowden cable arrangement 18 consists of a cable sash 19, a cable 20, a knob 21 held against an arcuate portion 16 of one shoe arm and of a stop 22 secured to the spindle rail 1.
In use, if for any reason the spindle 3 is to be braked to a standstill, the Bowden cable arrangement 18 is ac tivated by pulling the cable in the direction of arrow A (FIG. 1) e.g. by means ofa foot pedal (not shown). The clamping shoe 11 is thus closed on itself so that the braking elements 10 are pressed against the spindle braking surface 9. As the brake shoe 11 is kept flexible by means of the recesses 12, the brake elements 10 can follow, or take up the vibrations of the radially elastically supported spindle 3. If the spindle 3 is brought to a standstill, the cable 20 can be released again so that the brake elements 10 are lifted from the braking surface 9 by the inherent tension of the brake shoe 11.
Referring to FIGS. 3 and 6, the clamping shoe 23 which is similar to that described above can omit the use of reduced arm portions and instead can be connected by a spiral spring 24 and a screw 25 to the mounting angle 14. In this case, the shoe 23 can move relative to the screw 25 under a biasing force of the spring 23 which presses the shoe 23 against the mounting angle 14 during travel with a spindle (not shown). The spring 24 as shown is held between the head of the screw 25 and the shoe 23.
Referring to FIGS. 4 and 7, wherein like reference characters indicate like parts as above, the clamping shoe 23 can be held between two springs 26, 27 on a screw 25. As shown, one spring 26 is held between the head of the screw 25 and the shoe 23 while the other spring 27 is held between the mounting angle 14 and the shoe 23.
Referring to FIGS. 5 and 8, wherein like reference characters indicate like parts as above, the shoe 23 can also be connected directly to the bearing housing 5 my means of an elastic intermediate means such as by one piece spring member 28 as shown.
In use, a clamping shoe with a resilient connection as shown in one of FIGS. 3 to 8 operates in the same fashion as the shoe 11 described in FIGS. 1 and 2.
The invention thus provides a brake which is of utmost simplicity of construction and thus low manufacturing cost. Also, the invention permits the possibility of braking elastically supported spindles quickly to a standstill from any rotational speed of the speed range, with or without a load being placed on the spindle and without any additional vibrations (as described above) being caused and, thus, without damage to the brake or to the rotating elements.
What is claimed is:
1. In combination, a spindle rail, a housing secured to said spindle rail, a spindle having a braking surface thereon and being elastically supported radially in said housing, a brake including a clamping shoe having brake elements for pressing against said braking surface of said spindle upon tensioning of said shoe and being resiliently connected to said spindle rail to move radially with said braking surface upon pressing of said brake elements against said braking surface and elastic means connected to said shoe for tensioning of said shoe to press said brake elements against said braking surface on said spindle.
2. The combination as set forth in claim 1 wherein said clamping shoe includes a pair of arms, each said arm having a reduced portion therein adjacent said housing for effecting a resilient relation between each said arm and said housing.
3. The combination as set forth in claim 1 which further comprises an elastic intermediate means connecting said shoe to said housing.
4. The combination as set forth in claim 3 wherein said elastic intermediate means is a spring member connected between said shoe and said housing.
5. The combination as set forth in claim 3 wherein said elastic intermediate means includes at least one spring resiliently biasing said shoe relative to said housing.
6. The combination as set forth in claim 1 wherein said elastic means is a Bowden cable means.

Claims (6)

1. In combination, a spindle rail, a housing secured to said spindle rail, a spindle having a braking surface thereon and being elastically supported radially in said housing, a brake including a clamping shoe having brake elements for pressing against said braking surface of said spindle upon tensioning of said shoe and being resiliently connected to said spindle rail to move radially with said braking surface upon pressing of said brake elements against said braking surface and elastic means connected to said shoe for tensioning of said shoe to press said brake elements against said braking surface on said spindle.
2. The combination as set forth in claim 1 wherein said clamping shoe includes a pair of arms, each said arm having a reduced portion therein adjacent said housing for effecting a resilient relation between each said arm and said housing.
3. The combination as set forth in claim 1 which further comprises an elastic intermediate means connecting said shoe to said housing.
4. The combination as set forth in claim 3 wherein said elastic intermediate means is a spring member connected between said shoe and said housing.
5. The combination as set forth in claim 3 wherein said elastic intermediate means includes at least one spring resiliently biasing said shoe relative to said housing.
6. The combination as set forth in claim 1 wherein said elastic means is a Bowden cable means.
US00288481A 1972-09-13 1972-09-13 Brake for spinning and twisting spindles Expired - Lifetime US3823540A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6167688B1 (en) * 1998-08-13 2001-01-02 Murata Kikai Kabushiki Kaisha Individual-spindle-drive type multiple twister
US11697315B2 (en) * 2021-11-17 2023-07-11 Yujie Zhang Golf cart front suspension lift kit
US11866855B2 (en) * 2021-09-03 2024-01-09 Saurer Intelligent Technology AG Spinning position device with encapsulation

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2115268A (en) * 1936-09-26 1938-04-26 Sipp Eastwood Corp Spinning unit
US2638733A (en) * 1950-04-26 1953-05-19 Tmm Research Ltd Textile spinning, doubling, and twisting machine
US2975584A (en) * 1959-03-13 1961-03-21 Collins Brothers Machine Compa Automatic stop spindle mechanism
US3128591A (en) * 1963-01-30 1964-04-14 Curtiss Wright Corp Textile spindle brakes

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2115268A (en) * 1936-09-26 1938-04-26 Sipp Eastwood Corp Spinning unit
US2638733A (en) * 1950-04-26 1953-05-19 Tmm Research Ltd Textile spinning, doubling, and twisting machine
US2975584A (en) * 1959-03-13 1961-03-21 Collins Brothers Machine Compa Automatic stop spindle mechanism
US3128591A (en) * 1963-01-30 1964-04-14 Curtiss Wright Corp Textile spindle brakes

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6167688B1 (en) * 1998-08-13 2001-01-02 Murata Kikai Kabushiki Kaisha Individual-spindle-drive type multiple twister
US11866855B2 (en) * 2021-09-03 2024-01-09 Saurer Intelligent Technology AG Spinning position device with encapsulation
US11697315B2 (en) * 2021-11-17 2023-07-11 Yujie Zhang Golf cart front suspension lift kit

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