US3466896A - Shaft coupling - Google Patents

Shaft coupling Download PDF

Info

Publication number
US3466896A
US3466896A US671659A US3466896DA US3466896A US 3466896 A US3466896 A US 3466896A US 671659 A US671659 A US 671659A US 3466896D A US3466896D A US 3466896DA US 3466896 A US3466896 A US 3466896A
Authority
US
United States
Prior art keywords
coupling
shaft
shafts
shells
elastic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US671659A
Other languages
English (en)
Inventor
Erwin Pfarrwaller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sulzer AG
Original Assignee
Sulzer AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sulzer AG filed Critical Sulzer AG
Application granted granted Critical
Publication of US3466896A publication Critical patent/US3466896A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/50—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive with the coupling parts connected by one or more intermediate members
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D51/00—Driving, starting, or stopping arrangements; Automatic stop motions
    • D03D51/02—General arrangements of driving mechanism
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/02—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for connecting two abutting shafts or the like
    • F16D1/04—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for connecting two abutting shafts or the like with clamping hub; with hub and longitudinal key

Definitions

  • an elastic coupling for coupling together two aligned shafts, the coupling being capable of transmitting both torque and axial thrust without metal to metal contact between the shafts.
  • the coupling comprises on each of the shafts to be coupled a male end of polygonal cross-section, an elastic sleeve forced over that end, and a disc or washer aixed to the end of that shaft to prevent the sleeve from being pulled off. It also comprises an outer sleeve split into two substantially semicylindrcal rigid shells.
  • a loom is made up of a number of devices or components, some of which execute reciprocating or otherwise discontinuous motion.
  • these components impose momentary peak loads on the loom drive.
  • this is the case with the picking mechanism, the reed and the heddle frames.
  • the motions of these components must take place in the proper sequence and at the proper phases of the loom cycle.
  • the peak loads occurring in the individual components of the loom and the vibrations which may arise due to engagement or impact of moving parts with one another produce heavy stresses on the portions of the drive adjacent those power take-offs and these stresses are communicated back up the power train as far as the ywheel of the loom, and may thus have deleterious effects on the separate drives of the individual loom components.
  • the lighter components of the loom which must undergo precisely defined motions, such as the drive of the weft thread tuck-in needles in a loom of the gripper shuttle type.
  • the subsidiary drive shafts to those components may be insulated from and coupled to the shaft or shafts which drive them by means of elastic couplings, for the purposes of shock absorption. These couplings operate to take up and damp out the above described reactions.
  • the more sensitive ones are 3,466,896 Patented Sept. 16, 1969 ICC desirably arranged to derive their power from the main loom shaft upstream, in the sense of power flow, of elastic couplings through which the less sensitive components receive their power.
  • the take-offs to these sensitive elements may advantageously also include elastic couplings.
  • the elastic coupling elements employed must in gen# eral be capable of transferring not only torque but also axial thrust, because the bevel gear drives employed in the power take-offs or in reversing mechanisms and also the clutches, belt couplings -and the like involve axial stresses which are superposed on the torsional stresses of rotary motion. Even in the case of the axial stresses there are time variant loads having peaks and vibrations to be taken into account. These must so far as possible be taken up and damped out by elastic means in order to obtain a stable, quiet and dependable operation of the loom.
  • Elastic, shock absorbing couplings have been proposed in many forms.
  • coupling discs fastened perpendicularly to the axis of rotation on the adjacent ends of the two shafts are provided, one with eccentric studs which engage corresponding bores in the other in order to communicate rotary motion from the driving to the driven shaft.
  • Elastic elements combined with the studs for example, in the form of rubber sleeves, prevent engagement between rigid elements in the operation of the coupling and have a shock absorbing effect.
  • Such a coupling however occupies a certain amount of space transversely of the axis of rotation beyond the radius of the shafts. lt is, moreover, incapable of transmitting axial stress. Its elasticity is limited by the dimensions of the elastic components thereof and cannot be adjusted to varying individual circumstances.
  • a further simple solution of the coupling problem is achieved by giving to the adjacent ends of the shafts a polygonal cross-section, for example square, and by slipping over those adjacent ends a sleeve having the corresponding polygonal interior cross-section, an elastic lmass such as for example a rubber sleeve being vulcanized between one or both shafts and the sleeve, in order to confer on the coupling the desired elasticity.
  • an elastic lmass such as for example a rubber sleeve being vulcanized between one or both shafts and the sleeve, in order to confer on the coupling the desired elasticity.
  • Another known elastic coupling is one in which the end of one of the shafts has fastened thereto a projecting hollow sleeve of square interior cross-section and into which the other shaft end extends.
  • the end of the second shaft similarly possesses a square cross-section whose diagonal approximates the dimension of one side of the cross-section of the inside of the Sleeve.
  • the sleeve and the end of the second shaft are angularly displaced by about 45. Cylindrical elastic rubber rolls are then inserted, optionally with prestressing, into the' four empty corner spaces so provided between the sleeve and the end of the second shaft.
  • the invention provides an elastic coupling which connects together driving and driven shafts in an elastic and shock absorbing manner such that the stiffness of the coupling can be readily adjusted to match the requirements of any individual application.
  • the coupling can transmit both torsional and axial stresses, with relative motions between the driving and driven shafts of controllable small value, and the coupling is readily disassembled when stationary.
  • the ends of the shafts to be coupled together have a substantially polygonal cross-section.
  • a coupling member is provided which comprises at least two shells spaced from each other along a plane parallel to the axis of the shafts, these shells being held in relative position by adjustable stressing elements such as machine screws.
  • the coupling shells have, at least as to one of the shaft ends, cavities therein which are so matched to the corresponding shaft end that a vacant space is formed between them and the end of that shaft, this space being filled with an inert elastic material capable of absorbing mechanical stresses and which has the effect of preventing direct contact between the rigid parts of the coupling and the ends of the shaft and also between the ends of the shafts themselves.
  • the coupling of the invention is capable of providing dependable operation to the various elements of a loom so as to insure a proper time sequence in the' motions of its components.
  • the coupling of the invention can readily be opened up or disassembled, when its shafts are stationary, by loosening the tightening means, e.g. the machine screws above referred to.
  • the polygonal cross-section of the shaft ends and corresponding formation of the coupling shells which surround the shaft ends make possible transmission of torsional moments.
  • Preferably rectangular or triangular sections are employed since for given shaft diameters and torsional moments those crosssections provide more favorable loading conditions for the elastic inserts than do polygonal cross-sections having a larger number of sides. This is because with a small number of sides to the polygon the compression forces operate over larger surfaces and entail smaller shearing forces.
  • FIG. l is a schematic diagram of a loom tte'd with a drive coupling according to the invention and seen from the cloth beam end thereof;
  • FIG. 2 is a longitudinal section through a coupling in accordance with the invention, FIG. 2 being a sectional along the line II-II in FIG. 3 and FIG. 3 is a sectional view taken on the line I-I in FIG. 2.
  • reference characters 1 and 2 identify the frame members of a gripper shuttle loom on the picking and catching sides thereof.
  • Reference character 3 denotes a cloth beam while the main drive motor is indicated at 4, connected via a V-belt drive '5 with a pulley 6.
  • the pulley 6 is formed as a flywheel and connects to one side of a disengageable clutch.
  • Reference characters 8, 9 and 10 identify selvage-forming tucloin devices, the drives for which are derived from the main drive shaft 7 with the help of bevel gears, cams, drive belts or similar devices.
  • An elastic coupling 11 according to the invention connects the shaft 7 with a shaft 12, from which the picker 14 and reed are driven.
  • FIGS. 2 and 3 The coupling of the invention is illustrated in FIGS. 2 and 3.
  • the two Shafts to be coupled together are denoted 16 and 21. They have each on their adjacent ends a portion of substantially polygonal cross-section defined by four iiat faces successively apart and parallel to their respective axes, these faces being denoted 17 on shaft 16 and 22 on shaft 22.
  • Sleeve-like inserts 34 and 35 of rubber or the like fit over the ends of the shafts so shaped, and a circular disc as indicated at 19 and 24, is afxed at the end of each shaft by a screw as indicated at 20 and 25.
  • the disc 19 has a diameter larger than the separation of two opposite ones of the faces 17, and the disc 24 similarly has a diameter larger than the separation of two opposite ones of the faces 24.
  • each disc has a diameter somewhat larger than that of the circular portion of the shaft to which its afiixed, as shown. On each shaft therefore its insert is held, against motion axially of that shaft, between the shoulders (indicated at 18 on shaft 16 and at 23 on shaft 21) which are located at the ends of the flat faces away from the ends of the shafts and the discs 19 and 24.
  • the two shafts are joined by an outer sleeve made up of two substantially semicylindrical shells 26 and 27. These two shells are assembled together by means of machine screws 33, to form an outer sleeve embracing the adjacent ends of the shafts 16 and 21 via the elastic inserts 34 and 35. These inserts are received in cavities in the outer sleeve which the two shells thus form, these cavities having a cross-section similar to that of the shaft ends.
  • the shells 26 and 27 have at the middle of their axial length each an inwardly projecting rib of substantially semicircular extent so that when the coupling is assem-. ⁇ bled as shoft in FIG. 2, these ribs it with a suitable small clearance about the discs 19 and 24.
  • the rib of shell 27 is seen in FIG. 2, Where it bears reference character 36.
  • Each of the shells has between the semicircular rib thereof just described on each of its ends a partial cavity defined by a pair of plane surfaces as indicated at 28 in FIG. 3.
  • these two plane surfaces are at right angles to each other.
  • the four surfaces 28 at each end of the outer sleeve which the two shells then constitute define a cavity, generally indicated at 37 in FIG. 3, having a cross-section of substantially the same shape as the shaft ends and sufficiently larger to accommodate, with squeezing thereof, one of the elastic insert sleeves 34 and 35.
  • Each of these cavities in the outer sleeve formed by the assembled shells is partly bounded, adjacent the axial midpoint of that outer sleeve, by a shoulder surface as indicated at 29 in FIG. 2, formed on the semicircular ribs 36 of the shells.
  • each shell has affixed at each end thereof a plate 31 of substantially semicircular outline, except for a semicircular cut-out at the center provided therein for accommodation of one of the shafts 16 and 21.
  • each of the elastic inserts is squeezed between the two shells and 1s moreover held at the axial ends thereof not only by the surfaces 18 or 23 and the disc 19 or 24, but also between one of the shoulder surfaces 29 and one pair of coplanar semicircular discs 31.
  • the shells are moreover so dimensioned that with the coupling so assembled, the
  • the coupling of the invention is capable of transmitting not only torque but also axial thrust-the latter by virtue of engagement of the inserts 34 and 35 at the shoulders 18, 23, 29 and at the discs 31 and ribs 36, and also by frictional engagement of those inserts at the exterior faces 17 and 22 on the shafts and at the interior faces 28 on the shells.
  • the degree of isolation between the shafts can be controlled by the extent to which the screws 33 are tightened.
  • the elastic inserts tend to flow into these grooves, and by suitable dimensioning of these grooves the elastic ybehavior characteristics of the inserts, and hence of the coupilng, can within limits be controlled.
  • the coupling of the invention is made capable of transmitting not only torsional moments but also axial stresses.
  • the shoulder surfaces 1S and 23 on the shafts and 29 on the shells and the similar shoulder surfaces provided by the discs 19 and 24 and by the plates 31 confine the elastic inserts 34 and 35 at the axial ends thereof.
  • the shells are preferably so made that the plane (parallel to the common axis of the shafts) along which the shells are joined by the screws 33 contains at least one of the dihedral edges of the squared shaft ends. More particularly, the construction is preferably such that this plane contains the diagonal of the shaft cross-sections. With these constructions, the insert sleeves 34 and 35 will be dependably compressed when the screws 33 are tightened.
  • the elastic inserts are subjected to a suitably chosen prestressing by the tightening together of the coupling shells.
  • the inserts 34 and 35 may be made of a tough rubber-like shock absorbing material such as natural rubber, buna or Teflon of various hardnesses and thicknesses, optionally with reinforcement in the form of cords or textile fibers or other loading.
  • the coupling may include one or more than one of the yielding inserts 34 and 35.
  • it may include such an insert between the driving shaft and the coupling, or it may include that between the coupling and the driven shaft, the other of the yielding inserts 34 and 35 being replaced by a non-elastic dummy of metal in order to stiffen the coupling las a whole.
  • the individual elements of the coupling may be manufactured in series with preset dimensions and predetermined stress transmission characteristics to be stocked so as to be available according to need for selection and assembly in the combinations required to provide couplings of various characteristics.
  • the reaction of stress peaks and sudden increases in load in the picking mechanism 14 and reed 15 onto the drive to the tuck-in needle devices 8, 9 and 10 upstream of that coupling are reduced and peaks or variations are eliminated.
  • the adjacent ends 16 and 21 of the shafts rotate with respect to each other and to the shells 26 and 27, with corresponding deformation of the elastic inserts 34 and 35. This affects the relative timing of the operation of the loom components in that the drives which in the sense of energy transmission are downstream of the coupling 11 begin their motions with a phase shift, e.g.
  • phase shifts may however be held within tolerable limits by suitable dirnensioning of the coupling, suitable selection of material for the inserts 34 and 35, and suitable adjustment of the screws 33.
  • a shaft coupling comprising two shafts each having at one end thereof a portion of substantially polygonal cross-section, two substantially semi-cylindrical shells having at their axially opposite ends when assembled into a cylinder, cavities of substantially polygonal cross-section corresponding to and fitting with clearance about the polygonal portions of said shafts, a removable insert of yielding material disposed between said shells and at least one of said shaft ends, and means to draw said shells together about said shaft ends.
  • each of said shells has formed therein a groove of substantially semicircular cross-section along the intersection of two faces defining said cavities of polygonal cross-section.
  • a coupling according to claim 2 including a retaining disc at said one end of each of said shafts.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
US671659A 1966-09-30 1967-09-29 Shaft coupling Expired - Lifetime US3466896A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1418566A CH463422A (de) 1966-09-30 1966-09-30 Antrieb für Webmaschinen

Publications (1)

Publication Number Publication Date
US3466896A true US3466896A (en) 1969-09-16

Family

ID=4398659

Family Applications (1)

Application Number Title Priority Date Filing Date
US671659A Expired - Lifetime US3466896A (en) 1966-09-30 1967-09-29 Shaft coupling

Country Status (5)

Country Link
US (1) US3466896A (de)
AT (1) AT269760B (de)
CH (1) CH463422A (de)
DE (1) DE1710349C3 (de)
GB (1) GB1194039A (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2852510A1 (de) * 1978-12-05 1980-06-12 Kunz Masch App Vorrichtung zum kuppeln von wickelstaeben
US5272932A (en) * 1992-05-28 1993-12-28 The United States Of America As Represented By The Secretary Of The Navy Torsional device for remote control steering system
US20080083472A1 (en) * 2006-10-06 2008-04-10 Groz-Beckert Kg Shaft transmission for a weaving machine
US20140361478A1 (en) * 2012-01-27 2014-12-11 Smc Kabushiki Kaisha Electric clamp apparatus
CN108167345A (zh) * 2018-02-27 2018-06-15 安徽江淮汽车集团股份有限公司 一种汽车传动轴与后桥输入轴连接结构
US10066672B2 (en) * 2014-08-04 2018-09-04 Fluid Handling Llc Tapered washer shaft jacking arrangement

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2127858A (en) * 1982-09-28 1984-04-18 Shu Lien Liou A method of raising capability of a shuttleless loom and the like
TWI675155B (zh) * 2018-05-10 2019-10-21 蔡保源 套蓋快拆式聯軸器

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1887876A (en) * 1927-03-10 1932-11-15 Noble Warren Coupling
US2272900A (en) * 1940-11-08 1942-02-10 Firestone Tire & Rubber Co Resilient connector
FR972050A (fr) * 1940-09-27 1951-01-24 Tissages A Brechard Sa Des Procédé de fixation d'un organe sur un arbre
US2898751A (en) * 1957-12-16 1959-08-11 Chemstrand Corp Flexible coupling

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1887876A (en) * 1927-03-10 1932-11-15 Noble Warren Coupling
FR972050A (fr) * 1940-09-27 1951-01-24 Tissages A Brechard Sa Des Procédé de fixation d'un organe sur un arbre
US2272900A (en) * 1940-11-08 1942-02-10 Firestone Tire & Rubber Co Resilient connector
US2898751A (en) * 1957-12-16 1959-08-11 Chemstrand Corp Flexible coupling

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2852510A1 (de) * 1978-12-05 1980-06-12 Kunz Masch App Vorrichtung zum kuppeln von wickelstaeben
US4344304A (en) * 1978-12-05 1982-08-17 Kunz Maschinen- U. Apparatebau Gmbh Coupling for mandrels or the like
US5272932A (en) * 1992-05-28 1993-12-28 The United States Of America As Represented By The Secretary Of The Navy Torsional device for remote control steering system
US20080083472A1 (en) * 2006-10-06 2008-04-10 Groz-Beckert Kg Shaft transmission for a weaving machine
US7594522B2 (en) * 2006-10-06 2009-09-29 Groz-Beckert Kg Shaft transmission for a weaving machine
US20140361478A1 (en) * 2012-01-27 2014-12-11 Smc Kabushiki Kaisha Electric clamp apparatus
US10220491B2 (en) * 2012-01-27 2019-03-05 Smc Kabushiki Kaisha Electric clamp apparatus
US10066672B2 (en) * 2014-08-04 2018-09-04 Fluid Handling Llc Tapered washer shaft jacking arrangement
CN108167345A (zh) * 2018-02-27 2018-06-15 安徽江淮汽车集团股份有限公司 一种汽车传动轴与后桥输入轴连接结构

Also Published As

Publication number Publication date
GB1194039A (en) 1970-06-10
DE1710349B2 (de) 1973-09-06
AT269760B (de) 1969-04-10
DE1710349C3 (de) 1974-04-04
DE1710349A1 (de) 1971-10-14
CH463422A (de) 1968-09-30

Similar Documents

Publication Publication Date Title
RU2280112C2 (ru) Механизм для передачи возвратно-поступательного движения от приводного устройства к ремизке
US2703847A (en) Driving mechanism for starter-generator
US3296827A (en) Resilient coupling
US3545296A (en) Variable gear tooth contact arrangement
DE2151700A1 (de) Zentrifugalkupplung
US3094853A (en) Flexible transmission coupling
US2326451A (en) Flexible coupling
DE1710349C3 (de) Elastische Kupplung für Webmaschinen
AU4133699A (en) I-yoke mechanism
US2942440A (en) Coupling
US2792694A (en) Elastic coupling devices
US2796750A (en) Spacer coupling
US1550779A (en) Frictional slack-motion shaft coupling
CN213575232U (zh) 一种便于调节间距的联轴器
DE523345C (de) Antriebsvorrichtung fuer schwingungsfaehige Gebilde
US1687035A (en) Coupling
EP3247829B1 (de) Ladeantriebssystem für eine webmaschine
US2243900A (en) Flexible driving coupling
CN201574261U (zh) 喷气织机的打纬机构
US3074254A (en) Resilient shaft coupling
US2907188A (en) Flexible shaft-coupling
US2840998A (en) Couplings
US1407299A (en) Flexible expansion coupling for rotary shafts
US2645837A (en) Felt hardening machine
DE19535333B4 (de) Antriebsvorrichtung für eine Doppelteppichwebmaschine