US3411379A - Multiple loop tie-bar - Google Patents

Multiple loop tie-bar Download PDF

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Publication number
US3411379A
US3411379A US622789A US62278967A US3411379A US 3411379 A US3411379 A US 3411379A US 622789 A US622789 A US 622789A US 62278967 A US62278967 A US 62278967A US 3411379 A US3411379 A US 3411379A
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United States
Prior art keywords
bar
tie
bands
bushings
multiple loop
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Expired - Lifetime
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US622789A
Inventor
Gerard P Deyerling
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Bendix Corp
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Bendix Corp
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Publication date
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Priority to US622789A priority Critical patent/US3411379A/en
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Publication of US3411379A publication Critical patent/US3411379A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C53/00Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/56Winding and joining, e.g. winding spirally
    • B29C53/564Winding and joining, e.g. winding spirally for making non-tubular articles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/68Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
    • B29C70/86Incorporated in coherent impregnated reinforcing layers, e.g. by winding
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B64AIRCRAFT; AVIATION; COSMONAUTICS
    • B64CAEROPLANES; HELICOPTERS
    • B64C27/00Rotorcraft; Rotors peculiar thereto
    • B64C27/32Rotors
    • B64C27/327Retention means relieving the stress from the arm, e.g. tie-bars
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C7/00Connecting-rods or like links pivoted at both ends; Construction of connecting-rod heads
    • F16C7/02Constructions of connecting-rods with constant length
    • F16C7/026Constructions of connecting-rods with constant length made of fibre reinforced resin
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00Other particular articles
    • B29L2031/748Machines or parts thereof not otherwise provided for
    • B29L2031/75Shafts
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00Articles relating to transporting
    • F16C2326/43Aeroplanes; Helicopters
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00Machine element or mechanism
    • Y10T74/21Elements
    • Y10T74/2142Pitmans and connecting rods

Definitions

  • FIGURE 1 is an end view of a tie-bar in accordance with the principles of this invention.
  • FIGURE 2A is an end view along lines 2A-2A of FIGURE 2;
  • FIGURES 2, 3 and 4 are partial cross sectional plan views of the tie-bar construction afforded by this invention.
  • FIG. 2 Detailed description There is shown a tie-bar construction employing spherical end fittings or bushings and 12 (see FIGURE 2). These bushings have a pattern of grooves, one overlying the other on the rear face, as at 14, for receiving a plurality of closed loop bands 16, 18, 20, 22 and 24.
  • the bushings 10 and 12 are flattened, as at 26 and 28, on the top and bottom, and the front face 30 is machined to be flat. Face 30 is finished so that the bands 16 thru 24 leave the bushing tangentially therewith at the face 30'. In the construction shown this face 30 is of smaller area than'if the bands were to extend straight from one bushing 10 to the other bushing 12.
  • bands 16-24 are drawn together into a column appearing center section (see FIGURE 2A) by a pair of rings 34 and 36. These rings are formed by joining two portions 38 and 40 with an annular band 42, which may or may not be similar to the construction of the flexibly integrated filament bands 16-24.
  • the grooves for bands 20, 22 and 24 are shown in the cross sectioned bushing 10 with the bands 22 and 24 in cross section to show the flexibly integrated fiaments 44 in each of the bands in parallel arrangement one to the other.
  • the loading in the bands will not be substantially additive one on the other. This is due to large radius of the bearing surface of the band to the bushing which prevents compressive loading at the point of intersection 14.
  • the bands are bonded in the grooves of bushings 10 and 12 by the same substance, preferably, that flexibly integrates the filaments 44, such as polyurethane or a resin having sufiicient flexible additives to provide torsional resiliency to each band.
  • Pinholes 46 and 48 are drilled from one flat surface to the other for receipt of pins to unite the tie-bar to surrounding structure. This could be a pin through the rotor arm and a pin through the rotor blade of a helicopter rotor system where tensile loads are accompanied by torque which to a degree is permitted as long as restoring forces are present.
  • a tension-torsion tie-bar comprising:
  • first and second spherical end bushings each having a plurality of circumeferential grooves intersecting on the rear face
  • each band being contained in one of the circumferential grooves and bonded therein to said first and second bushings to space said bushings into a torsionally flexible tension carrying member.
  • a tie-bar according to claim 9 wherein said ring holds said bands in a circular profile with their side edges facing each other to form a tubular column between said end fittings.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Moulding By Coating Moulds (AREA)

Description

Nov. 19, 1968 s. P. DEYERLING 43,411,379
MULT IPLE LOOP TIE-BAR Filed March 13, 1967 2 Sheets-Sheet l [N VENTOR.
GEE/4E0 F? DE YE EL ING E; wwiw /4 7' TOENE Y N V- 1968 3. P. DEYERLING- 3,411,379
MULTIPLE LOOP TIE-BAR Filed March 15, 1967 2 Sheets-Sheet 2 Q INVENTOR.
GE EAED 1? DE YEEL/NG ATTOENE Y United States Patent 3,411,379 MULTIPLE LOOP TIE-BAR Gerard P. Deyerling, South Bend, Ind., assignor to The Bendix Corporation, a corporation of Delaware Filed Mar. 13, 1967, Ser. No. 622,789 11 Claims. (Cl. 74579) ABSTRACT OF THE DISCLOSURE A tension-torsion tie-bar having a plurality of bands of parallel filaments encased in a flexible substance about and bonded to end fittings providing separate elements for carrying tensile loads while being torsionally flexible.
S am In my As the use of laminated filament tape tie-bars increases, a need has arisen to improve the factor of safety beyond that attendant with present day methods. It has been adequately proven that singular bands of layers of flexibly integrated filaments will perform with a degree of satisfaction not heretofore thought possible. However, these methods have provided larger, and consequently heavier structures than is attendant when one utilizes less dense bands in accordance with this invention which are united to bushings so that they are equally loaded. To some extent present day tie-bar constructions, because of the increasing length of layers about layers, have inner layers carrying more load than the outer layers. In a tie-bar of the design taught by this invention all layers reinforce each other.
Drawing description FIGURE 1 is an end view of a tie-bar in accordance with the principles of this invention; I
FIGURE 2A is an end view along lines 2A-2A of FIGURE 2; and
FIGURES 2, 3 and 4 are partial cross sectional plan views of the tie-bar construction afforded by this invention.
Detailed description There is shown a tie-bar construction employing spherical end fittings or bushings and 12 (see FIGURE 2). These bushings have a pattern of grooves, one overlying the other on the rear face, as at 14, for receiving a plurality of closed loop bands 16, 18, 20, 22 and 24. The bushings 10 and 12 are flattened, as at 26 and 28, on the top and bottom, and the front face 30 is machined to be flat. Face 30 is finished so that the bands 16 thru 24 leave the bushing tangentially therewith at the face 30'. In the construction shown this face 30 is of smaller area than'if the bands were to extend straight from one bushing 10 to the other bushing 12. This is because the bands 16-24 are drawn together into a column appearing center section (see FIGURE 2A) by a pair of rings 34 and 36. These rings are formed by joining two portions 38 and 40 with an annular band 42, which may or may not be similar to the construction of the flexibly integrated filament bands 16-24.
The grooves for bands 20, 22 and 24 are shown in the cross sectioned bushing 10 with the bands 22 and 24 in cross section to show the flexibly integrated fiaments 44 in each of the bands in parallel arrangement one to the other. By using the spherical contour for bushings 10 and 12 and with the path of a closed loop chosen for bands 16-24 the loading in the bands will not be substantially additive one on the other. This is due to large radius of the bearing surface of the band to the bushing which prevents compressive loading at the point of intersection 14.
"ice
The bands are bonded in the grooves of bushings 10 and 12 by the same substance, preferably, that flexibly integrates the filaments 44, such as polyurethane or a resin having sufiicient flexible additives to provide torsional resiliency to each band. Pinholes 46 and 48 are drilled from one flat surface to the other for receipt of pins to unite the tie-bar to surrounding structure. This could be a pin through the rotor arm and a pin through the rotor blade of a helicopter rotor system where tensile loads are accompanied by torque which to a degree is permitted as long as restoring forces are present.
Having fully described a preferred construction of a tiebar in accordance with the tenets of my invention, it is now desired to set forth its intended scope of protection sought as follows.
I claim:
1. A tension-torsion tie-bar comprising:
first and second spherical end bushings each having a plurality of circumeferential grooves intersecting on the rear face; and
multiple bands circling said first and second bushings,
each band being contained in one of the circumferential grooves and bonded therein to said first and second bushings to space said bushings into a torsionally flexible tension carrying member.
2. A tie-bar according to claim 1 wherein said bands lie in said grooves to be flush with the spherical contour of said first and second bushings.
3. A tie-bar according to claim 1 wherein said bands pass from said first bushing to said second bushing in a closed loop pattern of substantially the same axial length.
4. A tie-bar according to claim 1 wherein said first and second bushings are flattened on top and bottom and provided with means to connect said bushings with structures to be united by said tie-bar.
5. A tie-bar according to claim 4 wherein said means is a pinhole extending from top to bottom of said bushing.
6. A tie-bar according to claim 1 wherein the front facing surfaces of said bushings is flattened to eliminate 0 -comprise semi-circular portions having a mating groove with a band about two portions in said groove to unite same.
11. A tie-bar according to claim 9 wherein said ring holds said bands in a circular profile with their side edges facing each other to form a tubular column between said end fittings.
References Cited UNITED STATES PATENTS 1,426,834 8/1922 Mechling 74579 3,279,278 10/1966 Eldred 74-579 3,362,252 1/ 1968 Ditlinger 74-579 3,362,253 1/ 1968 Ditlinger 74579 3,370,483 2/ 1968 Ditlinger 74579 FOREIGN PATENTS 1,334,446 7/1963 France.
FRED C. MATTERN, IR., Primary Examiner.
B. T. CALLAHAN, Assistant Examiner.
US622789A 1967-03-13 1967-03-13 Multiple loop tie-bar Expired - Lifetime US3411379A (en)

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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3768334A (en) * 1972-06-26 1973-10-30 Bendix Corp Load equalized tension torsion tie bar
US3977274A (en) * 1975-09-26 1976-08-31 The Bendix Corporation Tension-torsion tie bar
US4183261A (en) * 1976-12-21 1980-01-15 Messerschmitt-Bolkow-Blohm Gmbh Shackle
EP0019494A1 (en) * 1979-03-26 1980-11-26 Skf Compagnie D'applications Mecaniques-Adr Control or force transmitting link
EP0031413A1 (en) * 1979-12-19 1981-07-08 Messerschmitt-Bölkow-Blohm Gesellschaft mit beschränkter Haftung Connecting-rod for prime movers
DE3004575A1 (en) * 1980-02-08 1981-08-13 Sigri Elektrographit Gmbh, 8901 Meitingen CONNECTING ROD MADE OF COMPOSITE MATERIAL
FR2525299A1 (en) * 1982-04-19 1983-10-21 Fiat Auto Spa IMPROVED LIGHT CONNECTING ROD
US4552035A (en) * 1982-07-01 1985-11-12 Dunlop Limited Reinforced connecting link means
DE3438557A1 (en) * 1984-10-20 1986-04-24 Messerschmitt-Bölkow-Blohm GmbH, 8000 München Torsionally elastic connecting element which can be loaded in tension
US4666372A (en) * 1984-09-26 1987-05-19 Steven L. Odobasic Composite torsion link
US4841801A (en) * 1987-03-25 1989-06-27 Trw Inc. Connecting rod
US10988243B2 (en) * 2019-03-15 2021-04-27 Bell Textron Inc. Tension-torsion strap
US20220212510A1 (en) * 2019-05-06 2022-07-07 Zf Friedrichshafen Ag Multi-point link for an undercarriage of a vehicle
US20220212511A1 (en) * 2019-05-06 2022-07-07 Zf Friedrichshafen Ag Multi-Point Link for an Undercarriage of a Vehicle
US11440364B2 (en) * 2017-12-13 2022-09-13 Zf Friedrichshafen Ag Method for producing a component, and component
US11485184B2 (en) * 2017-08-04 2022-11-01 Zf Friedrichshafen Ag Three-point suspension link and production method for a three-point suspension link

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1426834A (en) * 1921-10-11 1922-08-22 Fidelis M Mechling Beam hanger
FR1334446A (en) * 1961-06-28 1963-08-09 Bolkow Entwicklungen Kg Joint without friction
US3279278A (en) * 1964-04-24 1966-10-18 Bendix Corp Tension-torsion tie-bar and end fittings therefor
US3362253A (en) * 1966-03-09 1968-01-09 Bendix Corp Tension-torsion tie-bar and end fittings therefor
US3362252A (en) * 1965-10-21 1968-01-09 Bendix Corp Redundant connecting link
US3370483A (en) * 1966-03-09 1968-02-27 Bendix Corp Laminated tension-torsion tie-bar

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1426834A (en) * 1921-10-11 1922-08-22 Fidelis M Mechling Beam hanger
FR1334446A (en) * 1961-06-28 1963-08-09 Bolkow Entwicklungen Kg Joint without friction
US3279278A (en) * 1964-04-24 1966-10-18 Bendix Corp Tension-torsion tie-bar and end fittings therefor
US3362252A (en) * 1965-10-21 1968-01-09 Bendix Corp Redundant connecting link
US3362253A (en) * 1966-03-09 1968-01-09 Bendix Corp Tension-torsion tie-bar and end fittings therefor
US3370483A (en) * 1966-03-09 1968-02-27 Bendix Corp Laminated tension-torsion tie-bar

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3768334A (en) * 1972-06-26 1973-10-30 Bendix Corp Load equalized tension torsion tie bar
US3977274A (en) * 1975-09-26 1976-08-31 The Bendix Corporation Tension-torsion tie bar
US4183261A (en) * 1976-12-21 1980-01-15 Messerschmitt-Bolkow-Blohm Gmbh Shackle
EP0019494A1 (en) * 1979-03-26 1980-11-26 Skf Compagnie D'applications Mecaniques-Adr Control or force transmitting link
EP0031413A1 (en) * 1979-12-19 1981-07-08 Messerschmitt-Bölkow-Blohm Gesellschaft mit beschränkter Haftung Connecting-rod for prime movers
DE3004575A1 (en) * 1980-02-08 1981-08-13 Sigri Elektrographit Gmbh, 8901 Meitingen CONNECTING ROD MADE OF COMPOSITE MATERIAL
EP0033765B1 (en) * 1980-02-08 1983-11-16 Sigri Elektrographit Gmbh Connecting rod made of composite material
FR2525299A1 (en) * 1982-04-19 1983-10-21 Fiat Auto Spa IMPROVED LIGHT CONNECTING ROD
US4552035A (en) * 1982-07-01 1985-11-12 Dunlop Limited Reinforced connecting link means
US4666372A (en) * 1984-09-26 1987-05-19 Steven L. Odobasic Composite torsion link
DE3438557A1 (en) * 1984-10-20 1986-04-24 Messerschmitt-Bölkow-Blohm GmbH, 8000 München Torsionally elastic connecting element which can be loaded in tension
US4841801A (en) * 1987-03-25 1989-06-27 Trw Inc. Connecting rod
US11485184B2 (en) * 2017-08-04 2022-11-01 Zf Friedrichshafen Ag Three-point suspension link and production method for a three-point suspension link
US11440364B2 (en) * 2017-12-13 2022-09-13 Zf Friedrichshafen Ag Method for producing a component, and component
US10988243B2 (en) * 2019-03-15 2021-04-27 Bell Textron Inc. Tension-torsion strap
US20220212510A1 (en) * 2019-05-06 2022-07-07 Zf Friedrichshafen Ag Multi-point link for an undercarriage of a vehicle
US20220212511A1 (en) * 2019-05-06 2022-07-07 Zf Friedrichshafen Ag Multi-Point Link for an Undercarriage of a Vehicle
US11878563B2 (en) * 2019-05-06 2024-01-23 Zf Friedrichshafen Ag Multi-point link for an undercarriage of a vehicle

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