US3844537A - Cable pulley - Google Patents

Cable pulley Download PDF

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Publication number
US3844537A
US3844537A US00377651A US37765173A US3844537A US 3844537 A US3844537 A US 3844537A US 00377651 A US00377651 A US 00377651A US 37765173 A US37765173 A US 37765173A US 3844537 A US3844537 A US 3844537A
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United States
Prior art keywords
cable
pulley
groove
parts
shaft
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Expired - Lifetime
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US00377651A
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English (en)
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J Rinio
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Individual
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Individual
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Publication date
Priority claimed from DE2233659A external-priority patent/DE2233659A1/de
Priority claimed from DE19732328474 external-priority patent/DE2328474A1/de
Priority claimed from DE19732334045 external-priority patent/DE2334045A1/de
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US3844537A publication Critical patent/US3844537A/en
Anticipated expiration legal-status Critical
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/60—Rope, cable, or chain winding mechanisms; Capstans adapted for special purposes
    • B66D1/74—Capstans
    • B66D1/7415—Friction drives, e.g. pulleys, having a cable winding angle of less than 360 degrees

Definitions

  • a cable pulley has a cable groove extending in the [58] Field 61 Search 254/1755, 191; 226/183; f a Serpent amund the perphery the 19 Claims, 27 Drawing Figures CABLE PULLEY
  • the invention relates to a cable pulley having a cable groove arranged on the periphery of the pulley, especially for driving a cable of unlimited length.
  • wedge-shaped grooves have the disadvantage that the cable wears down the wedge surfaces so that the clamping action becomes smaller and therefore the greater friction between the cable pulley and the cable is again decreased.
  • the cable groove has preferably the form of a sine curve about the periphery of the cable disc.
  • a cable groove in the form of a polygonal course wherein .the cable groove may comprise segments extending parallel to the pulley surfaces and segments extending obliquely to the pulley surfaces.
  • the selection of the groove course depends on the type of cable to be utilized. Because the cable is subjected to a back fiexion stress the sine curve is more appropriate for low flexibility steel cables having a twist in opposite directions, whereas for a cable disc with a groove in the formof a polygonal course, for example, hemp or jute cables may be utilized.
  • the cable pulley may comprise two pulley parts that are displaceable in the axial direction relative to each other, wherein each pulley part presents on its peripheral edge facing the other pulley part half the cable groove.
  • the two pulley parts are arranged on a shaft so as to be rotatable relative to each other, whereby an additional clamping of the cable in the cable groove may be obtained.
  • the cable groove may have in a known manner a semicircular section. However, it is preferably square shaped so that on the one side the cable may move in the obliquely extending segments better on the cable pulley and so that on the other side a rectilinear support surface is provided on the pulley for the cable during rotation so that the cable does not have the tendency to slip upwardly out of the groove.
  • a cable groove with a semi-elliptical section wherein the greater diameter of the ellipse is normal to the axis of the pulley.
  • the cable can be well supported at the side flanks of the groove and in case of higher tension forces thecable is pulled deeper and deeper into the groove and it is more and more fixedly clamped therein.
  • an excellent entering of the cable into the groove may also be obtained without a special cable guide means when the radial central plane of the cable groove, depending on the direction of the cable groove, oscillates back and forth on the pulley periphery, in such a way that it takes up alternately a position on the one or the other side which is inclined relative to' the plane of the cable pulley.
  • This construction has the advantage that the cable running over the cable pulley is clamped in the cable groove at different points of its periphery depending on the direction of the cable groove.
  • the cable wears uniformly at least on half of its periphery. Due to the slippage of the cable the stress of the cable is uniformly distributed along the entire cable length after several reciprocating cable movements.
  • edges of the undercut cable groove are preferably chamfered.
  • the cable may enter also without special guide means into the undercut cable groove profile and may move out of the cable groove when the cable moves away off the pulley.
  • the chamfered edges of the undercut cable groove may preferably define an inlet groove located substantially in the central plane of the cable pulley. This construction has the advantage that the cable may move into the cable groove and out of this groove without constraint, while all the advantages of the serpentine shaped cable groove and of the undercut profile are maintained.
  • the undercut cable groove on the periphery of two rim halves which are fixed on the outer periphery of a planar, circular disc and which are connected to one another.
  • the pulley parts may be connected to each other by at least one connecting element of elastic material.
  • This construction has the advantage that the two pulley parts may still be rotated relative to each other under the influence of the loaded cable but that at the same time a return force is generated which counteracts unduly high forces acting in the peripheral direction.
  • the elastic connection element develops its elasticity not only during torsion in the peripheral direction but also in the axial direction because the cable clamped in the cable groove has the tendency to separate the pulley parts.
  • the elastic connection element may follow such an axial separation also to a limited extend and in this way may reduce unduly high clamping forces.
  • the pulley parts which are rotatable with respect to each other are returned to their initial position when the cable is not loaded or removed, and in this position the lateral flanks of the cable groove arranged on the two pulley parts are parallel to each other. It is therefore particularly simple to place a cable over the empty cable pulley or to push the cable in the peripheral direction over the cable pulley, because the cable groove may be slightly larger in the non-loaded condition of the cable than the cable diameter.
  • one cable part may be fixedly mounted on the shaft and the other cable part may be rotatable on the shaft, and the two pulley parts may be locked against axial displacement on the shaft.
  • the elastic connection elements deploy their return force only in the peripheral direction, while the clamping forces exerted in the axial direction on the pulley parts are absorbed and transmitted by means of a shoulder or the like to the shaft.
  • Such a construction is preferable in case relatively soft elastic materials are utilized for the connection element.
  • the rim of the one pulley part is U-shaped and half the cable groove is provided on an arm of the U-shaped rim, while the other single or multi-part pulley part is annular and is rotatably mounted on the inner surface of the U-shaped rim, and the single or multi-part elastic connection element is arranged on the inner surface of the U-shaped rim.
  • the connecting element may consist of a ring of rubber or elastic plastic material and may be vulcanized or bonded to the inner surfaces of the pulley parts. This construction is particularly simple and requires no additional measures with respect to the disc parts. However, the disc parts may also be connected together by a plurality of pins of rubber or elastic plastic material which are lodged in apertures or recesses of the disc parts. The number of pins, their thickness and the elasticity of the material determine the return force which acts on the disc parts.
  • the connecting element may also consist of a spiral spring or a leaf spring.
  • FIG. 1 is a diagrammatic side view of a cable drive having a drive pulley and pressing rollers
  • FIG. 2 is a front elevation view of a cable pulley according to the invention
  • FIG. 3 is a side view of the cable pulley according to FIG. 1,
  • FIGS. 4, 4a and 5 illustrate two further embodiments of the invention in front elevation view respectively in side view
  • FIGS. 6 to 10 are developments of a peripheral part of cable pulleys having cable grooves of different form
  • FIGS. 11 to 14 illustrate partial diametrical sections of the cable pulley according to FIG. 3 along line XX having different groove sections
  • FIG. 15 is a partial section of the cable pulley according to FIG. 9,
  • FIG. 16 is a diametrical partial section of a cable pulley according to the invention.
  • FIG. 17 is a diagrammatic top view of a partial development of the cable pulley periphery
  • FIGS. 18, 19, and 20 are diagrammatic partial sections along lines lIIIlI, IVIV, and VV of FIG. 17,
  • FIG. 21 is a diametrical section view of a further embodiment of the cable pulley according to the invention.
  • FIG. 22 is a partial top view of the embodiment of FIG. 21,
  • FIG. 23 is a partial diametrical section of a modified embodiment of the cable pulley according to FIG. 21,
  • FIG. 24 is a side view of the embodiment of FIG. 23,
  • FIG. 25 is a diametrical partial section of a further modified embodiment of the cable pulley according to FIG. 1, and
  • FIG. 26 is a schematic representation of the elastic connecting element consisting of a leaf spring.
  • FIG. 1 illustrates the drive for a cable of unlimited length in a diagrammatic representation, such a drive being used, for example, to drive a lift for carrying persons or loads.
  • the incoming end of the cable 11 guided around the cable pulley 10 which serves as drive pulley is designated with 11a and the outgoing end of the cable is designated with 11b.
  • the incoming end 11a of the cable is guided over a support and pressing roller 12 and the outgoing end 11b is guided over a pressing roller 13 which are disposed with respect to the drive pulley such that an angle of contact a of about 270 is obtained.
  • the drive pulley 10 is driven by a drive motor (not shown) in the direction of the arrow A whereby the incoming end 11a of the cable is pulled upwardly, while the outgoing end 11b moves off downwardly.
  • a drive motor not shown
  • the cabin of an elevator may be suspended on the end Ila while on the lower extremity of the outgoing end 11b a counterweight may be fixed. It is also possible to eliminate one of the two rollers I2 and 13.
  • the cable pulley I0 utilized inthe cable drive of FIG. 1 has a cable groove 14 with a semi-circular section, which groove, as can be seen in FIG. 2, extends in the form of a serpentine around the periphery of the cable pulley l0, i.e., the cable groove is not always lo-' cated in the same plane of the cable pulley but it travels along the periphery of the cable pulley back and forth from one side of the pulley to the other.
  • FIGS. 6 to 10 developments of a part of the periphery of different embodiments of cable pulleys 10 according to the invention are represented.
  • the cable groove 14 on the peripheral surface 15 has the form of a flat sine curve.
  • the cable groove has the form of a polygonal course, having sections 4b extending obliquely to the pulley surfaces 16 and 17, these sections being rounded at their apexes 140.
  • FIG. 8 shows also a cable pulley in the form of a p0 lygonal course having sections 14a parallel to the pulley surfaces 16 and 17 and sections 14b extending obliquely to the pulley surfaces 16 and 17, wherein the cable groove is rounded at the connection points of the sections 140 and 14b.
  • FIG. 9 shows a cable groove 14 similar to the embodiment of FIG. 8 but which is not rounded off at the connection points of the segments 14a and 14b.
  • FIG. 10 the development of a part of the periphery of a cable pulley is represented, which consists of two pulleypartsIO and 10b.
  • one pulley part 10b is fixedly mounted on the drive shaft 18, while the other pulley part 10a is freely journaled on the shaft 18 and is displaceable axially against the pulley part 10b in the direction of the arrows 19.
  • the pulley part 10a is coupled to the pulley part 10b by driving pins 21 extending into recesses formed in the pulley part 10b.
  • Each of the two pulley parts that are axially movable relative to'each other. is provided with half the cable groove 14 which in this embodiment has a semicircular section and extends in the form of a sine curve over the periphery 15 of the pulley.
  • the groove halves are each provided on the oppositely disposed edge 22 or 23 of the pulley parts. It is apparent that due to an axial displacement of both pulley parts relative to each other thediameter of the cable groove 14 can be var- It may be appropriate to provide an adjustable stop on the shaft for the axially movable pulley part 10a in order to limit its movement in the axial direction. This permits the utilization of different diameter cables and provides furthermore the possibility to compensate for wear of the cable by changing the spacing of the two pulley parts.
  • the two pulley parts 10a and 10b are rotatable relative to each other and possibly also axially movable to each other. If the two pulley parts are rotatable relative to each other, one may obtain an automatic clamping of the cable in the cable groove, so that for the same angles of contact 0: greater forces may be transmitted I over the cable pulley to the cable.
  • FIG. 4a an embodiment is represented wherein the pulley part 10a is fixedly mounted on the shaft 18, while the pulley part 10b is rotatable with respect to the shaft 18 and thus also with respect to the pulley part 10a, and at the same time is also axially movable with respect to the shaft.
  • the pulley part 10b is threaded with an inner thread on a thread 18a of the shaft 18 and may therefore rotate with respect to the fixed pulley part 10a and may axially move with respect thereto. It is apparent that in case of a rotation of the pulley part 10b with respect to the pulley part 10a the section of the cable groove 14- is locally restricted so that a more or less important clamping of the cable located in the cable groove is obtained at these local regions. The clamping of the cable is obtained automatically by the influence of the cable tension force and the friction contact between the cable and the cable pulley.
  • the cable groove'14 in the cable pulley is automatically adjusted to different cable diameters, wherein at the same time the cable wear is compensated. Due to the axial movement of the pulley part 10b the introduction of the cable into the cable groove is also simplified.
  • the broken lines indicate the adjustable pulley part 10b in a position 10b which has a slightly greater spacing from the fixed pulley part 10y than in the position 10b.
  • FIGS. 11 to 14' different section forms of the cable groove 14 are shown.
  • the cable groove 14 is semi-circular and in the embodiment shown in FIG. 12 the cable groove 14 is semi-elliptical wherein the greater diameter 24 of the ellipse is normal to the axis 25 of the pulley.
  • the cable groove 14 has a trapezoidal section and in the embodiment of FIG. 14 the cable groove 14 is square shaped.
  • the cable groove 14 has an undercut profile, i.e., thecable 11 is located behind a projection 26 extending partially over the upper side of the cable.
  • the cable pulley 10 of FIG. 16 consists of a flat, circular disc 30 which'is fixedly mounted on a shaft 18 and which supports on its periphery two rim halves 31a and 31b which are welded on their entire surface to the disc 30 or are locally fixed thereto by rivets or bolts 32.
  • the rim halves 31a and 31b of the cable pulley 10 have on their periphery 15 a cable groove 14 which, as
  • FIG. 17 extends in the form of a serpentine in the peripheral direction.
  • the cable groove 14 has an undercut profile, i.e., its radial central plane 33 does not coincide with the plane 35 of the cable pulley, but forms with this plane an acute angle B.
  • this angle B is not constant along the periphery 15 of the cable pulley 10 but the radial central plane 33 of the cable groove 14 oscillates from one side to the other, depending on the direction of the cable groove 14 moving from one side to the other on the pulley periphery 15, such that the plane 33 assumes alternately a position inclined toward the one or the other side 16 or 17 of the cable pulley plane 34.
  • the undercut edges 26 of the cable groove 14 indicated by broken lines are chamfered so that the chamfered surfaces 36 define an inlet groove 37 located substantially in the central plane 34 of the cable pulley.
  • the chamfered surfaces may extend parallel to the flanks 38 of the cable groove or may also have a greater inclination with respect to the central plane 34 of the cable pulley.
  • FIG. 21 shows a cable pulley 10 which is mounted on a shaft 18.
  • the cable pulley 10 comprises two pulley halves 10a and 10b.
  • the pulley half 10a is fixedly positioned by means of a key 42 on the shaft 18. However, the pulley part 10b may rotate on the shaft 18.
  • both pulley halves 10a and 10b are provided on their periphery with a serpentine shaped cable groove 14, whose one flank 14' is formed in the pulley half 10a and whose other flank I4" is formed in the pulley half 10b.
  • the two pulley halves 10a and 10b have each a recess 44 in which a ring 45 of rubber or elastic plastic material is arranged which is vulcanized or bonded to the inner surfaces of the pulley halves 10a and 10b.
  • the ring 45 of rubber elastic material returns the pulley halves 10a and 10b to the initial position shown in FIG. 22, in which the flanks l4 and 14" of the cable groove on the two cable halves 10a and 10b are parallel to each other.
  • the pulley halves 10a and 10b have a plurality of apertures 48 distributed over the pulley surfaces and extending completely through the pulley halves 10a and 10b, and in which pins 49 of rubber or elastic plastic material are inserted. Also in this embodiment the rotary motion of the two pulley halves 10a and 10b relative to each other is limited by the elasticity of the elastic pins 49 which return the pulley halves to the initial position when the cable is not loaded.
  • the cable pulley consists of a pulley part 10a whose rim is U-shaped, and of an annular pulley part 10b mounted on the inner surface of the U-shaped rim, wherein one arm 10c of the U-shaped rim and the annular pulley part 10b are provided each with half the cable groove 14, and wherein the elastic connection element 52 is disposed on the inner surface of the U-shaped rim.
  • the first mentioned elements 10b, 52 may be made in two parts or the straight arm of the U-shaped rim may be removable.
  • the connecting element may also consist of one or more spiral springs or a leaf spring.
  • FIG. 26 corresponds to the latter embodiment, wherein the line A,, 3,, A B represents a leaf spring 53 connected simultaneously to the non-loaded pulley parts 10a, 10b while the line A,, B A B represents the same spring after a relative rotation B 8,, has occurred between the pulley parts.
  • the pins do not extend completely through the pulley halves but are inserted only in pocket holes formed in the inner surfaces of the pulley halves.
  • the rubber ring shown in FIGS. 21 and 22 may be partially inserted into the pulley halves and may be connected additionally by tholes to the pulley halves.
  • the invention is not limited to the embodiments described herein, more particularly there are many different fields of application where a cable pulley according to the invention may be utilized. For example it may be used advantageously in a cable hauling device for pulling and releasing cable of unlimited length.
  • the cable pulley according to the invention may also serve as drive pulley for the drive cables of aerial cable ways or the like.
  • the drive pulley according to the invention must not consist of a full disc but instead may consist of a pulley with spokes.
  • the drive pulley according to the invention must not consist of a full disc but instead may consist of a pulley with spokes.
  • a cable pulley for driving a cable of indefinite length, said pulley having a cable groove, in its outer periphery, extending therearound in a generally serpentine path, said pulley comprising two parts each of which has a portion of said groove therein, said parts being relatively rotatable, about their central axis and movable axially relative to each other.
  • a cable pulley according to claim 8 wherein the respective undercut edges are chamfered.
  • connection element consists of a ring of rubber or the like material and is bonded to the inner surfaces of the pulley parts.
  • connection element consists of at least one spring.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pulleys (AREA)
US00377651A 1972-07-08 1973-07-09 Cable pulley Expired - Lifetime US3844537A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE2233659A DE2233659A1 (de) 1972-07-08 1972-07-08 Seilscheibe
DE19732328474 DE2328474A1 (de) 1973-06-05 1973-06-05 Seilscheibe
DE19732334045 DE2334045A1 (de) 1973-07-04 1973-07-04 Seilscheibe

Publications (1)

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US3844537A true US3844537A (en) 1974-10-29

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Application Number Title Priority Date Filing Date
US00377651A Expired - Lifetime US3844537A (en) 1972-07-08 1973-07-09 Cable pulley

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US (1) US3844537A (enrdf_load_stackoverflow)
AU (1) AU5789173A (enrdf_load_stackoverflow)
DD (1) DD106078A5 (enrdf_load_stackoverflow)
ES (1) ES416699A1 (enrdf_load_stackoverflow)
FR (1) FR2192256B1 (enrdf_load_stackoverflow)
IL (1) IL42713A0 (enrdf_load_stackoverflow)
IT (1) IT998212B (enrdf_load_stackoverflow)
LU (1) LU67967A1 (enrdf_load_stackoverflow)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4077271A (en) * 1975-02-19 1978-03-07 Walter M. Mathews Drive power transmission element
US5415593A (en) * 1993-05-24 1995-05-16 Mathews; Frederic Drive power transmission element
USD598480S1 (en) * 2004-12-13 2009-08-18 Kabushiki Kaisha Kanemitsu Pulley
US20150284228A1 (en) * 2014-04-04 2015-10-08 David R. Hall Motorized Lifting Device with Accurate Weight Measuring Capability
CN112879531A (zh) * 2021-02-01 2021-06-01 浙江诺和机电股份有限公司 一种绳槽轮及绳牵引装置
US20220324684A1 (en) * 2021-04-12 2022-10-13 Hall Labs Llc Line Gripping Winch Drum

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4151980A (en) * 1976-11-26 1979-05-01 Lewmar Marine Limited Winch
EP0685423A1 (de) * 1994-04-19 1995-12-06 Ewald Ettrich Vorrichtung zum Spannen von Tauen, Seilen oder Drähten
US6070858A (en) * 1996-10-17 2000-06-06 Anke Hase Single loop tractioned winch-like device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US587806A (en) * 1897-08-10 Powee deivee foe bicycles
CH27210A (de) * 1902-12-13 1903-12-15 Brunner J C Rolle für biegsame Zugorgane
US2802366A (en) * 1952-09-17 1957-08-13 American Enka Corp Slippage reducing pulley
US3104792A (en) * 1963-09-24 Wire pulling device
GB1233174A (enrdf_load_stackoverflow) * 1967-06-15 1971-05-26

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US587806A (en) * 1897-08-10 Powee deivee foe bicycles
US3104792A (en) * 1963-09-24 Wire pulling device
CH27210A (de) * 1902-12-13 1903-12-15 Brunner J C Rolle für biegsame Zugorgane
US2802366A (en) * 1952-09-17 1957-08-13 American Enka Corp Slippage reducing pulley
GB1233174A (enrdf_load_stackoverflow) * 1967-06-15 1971-05-26

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4077271A (en) * 1975-02-19 1978-03-07 Walter M. Mathews Drive power transmission element
US5415593A (en) * 1993-05-24 1995-05-16 Mathews; Frederic Drive power transmission element
USD598480S1 (en) * 2004-12-13 2009-08-18 Kabushiki Kaisha Kanemitsu Pulley
USD624103S1 (en) 2004-12-13 2010-09-21 Kabushiki Kaisha Kanemitsu Pulley
US20150284228A1 (en) * 2014-04-04 2015-10-08 David R. Hall Motorized Lifting Device with Accurate Weight Measuring Capability
US9598269B2 (en) * 2014-04-04 2017-03-21 David R. Hall Motorized lifting device with a grooved drum for lifting a load and determining a weight of the load while lifting
CN112879531A (zh) * 2021-02-01 2021-06-01 浙江诺和机电股份有限公司 一种绳槽轮及绳牵引装置
CN112879531B (zh) * 2021-02-01 2025-04-04 浙江诺和机电股份有限公司 一种绳槽轮及绳牵引装置
US20220324684A1 (en) * 2021-04-12 2022-10-13 Hall Labs Llc Line Gripping Winch Drum
US12024409B2 (en) * 2021-04-12 2024-07-02 Hall Labs Llc Line gripping winch drum

Also Published As

Publication number Publication date
ES416699A1 (es) 1976-06-16
DD106078A5 (enrdf_load_stackoverflow) 1974-05-20
FR2192256A1 (enrdf_load_stackoverflow) 1974-02-08
IL42713A0 (en) 1973-10-25
IT998212B (it) 1976-01-20
LU67967A1 (enrdf_load_stackoverflow) 1973-09-11
AU5789173A (en) 1975-01-09
FR2192256B1 (enrdf_load_stackoverflow) 1974-07-05

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