WO2002052162A2 - Poulie de roue libre munie d'alesages de l'outil - Google Patents

Poulie de roue libre munie d'alesages de l'outil Download PDF

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Publication number
WO2002052162A2
WO2002052162A2 PCT/US2001/050568 US0150568W WO02052162A2 WO 2002052162 A2 WO2002052162 A2 WO 2002052162A2 US 0150568 W US0150568 W US 0150568W WO 02052162 A2 WO02052162 A2 WO 02052162A2
Authority
WO
WIPO (PCT)
Prior art keywords
hub
sheave
clutch
over
tool
Prior art date
Application number
PCT/US2001/050568
Other languages
English (en)
Other versions
WO2002052162A3 (fr
WO2002052162A9 (fr
Inventor
Robert W. Frayer, Jr.
Original Assignee
Frayer Robert W Jr
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 Frayer Robert W Jr filed Critical Frayer Robert W Jr
Publication of WO2002052162A2 publication Critical patent/WO2002052162A2/fr
Publication of WO2002052162A9 publication Critical patent/WO2002052162A9/fr
Publication of WO2002052162A3 publication Critical patent/WO2002052162A3/fr

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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
    • F16D41/00—Freewheels or freewheel clutches
    • F16D41/20—Freewheels or freewheel clutches with expandable or contractable clamping ring or band
    • F16D41/206—Freewheels or freewheel clutches with expandable or contractable clamping ring or band having axially adjacent coils, e.g. helical wrap-springs

Definitions

  • This invention relates generally to devices in the over-running clutch field, and more specifically to an improved over-running clutch pulley for use with an accessory device driven by an automotive engine with a belt drive.
  • a drive belt is typically used to power and operate various accessory devices.
  • One of these accessory devices is typically an automotive alternator, which provides electrical power to the automobile. While several arrangements of drive belts are in use, the serpentine arrangement, which drives several accessory devices, is currently most favored.
  • Serpentine arrangements typically include a drive pulley connected to the crankshaft of the engine (the "output device") and a drive belt trained about the drive pulley.
  • the drive belt is also trained about one or more conventional driven pulleys, which are connected to the input shafts of various accessories devices (the "input device”).
  • the drive belt may experience many instances of sudden deceleration relative to the input shaft. This situation may occur, for example, during a typical shift from first gear to second gear under wide open throttle acceleration. This situation is worsened if the throttle is closed or "back off” immediately after the shift. In these situations, the drive belt decelerates very quickly while the driven pulley, with the high inertia from the accessory device, maintains a high rotational speed, despite the friction between the drive belt and the driven pulley.
  • FIGURE 1 is a perspective view of an over-running clutch pulley of the first preferred embodiment, shown with a drive belt as the input device and a cylindrical shaft as the output device;
  • FIGURE 1
  • FIGURE 7 is a front view of the hub member of an over-running clutch pulley of the third preferred embodiment.
  • FIGURE 8 is a front view of the hub member of an over-running clutch pulley of the fourth preferred embodiment.
  • the over-running clutch pulley 10 may be used in an environment with two devices that alternate their rotational input responsibilities, and in an environment with an "output device” that actually provides rotational input and with an "input device” that actually receives rotational input.
  • the terms “input device” and “output device” are interchangeable.
  • the over-running clutch pulley 10 of the first preferred embodiment includes a sheave member 20, a hub member 22 located substantially concentrically within the sheave member 20, and a clutch member 26, which cooperate to rotationally engage the drive belt and the cylindrical shaft.
  • the sheave member 20 preferably includes a sheave input section 28 adapted to engage the input device and a sheave clutch section 30 defining a sheave clutch surface 32.
  • the hub member 22 preferably includes a hub output section 36 adapted to engage the output device and a hub clutch section 38 defining a hub clutch surface 40.
  • the hub member further includes a hub body section 42 defining two tool bores 44 and 46 formed to engage a tool (shown in FIGURES 4 -6 and discussed below).
  • the two tool bores 44 and 46 ease the installation and removal of the over-running clutch pulley 10, while minimizing overall length and weight of the over-running clutch pulley 10.
  • the sheave input section 28 of the sheave member 20 of the first preferred embodiment functions to engage the drive belt.
  • the sheave input section 28 preferably defines a sheave input surface 50 with two sheave input shoulders 52 and at least one sheave input groove 54.
  • the sheave input section 28 may alternatively define other suitable surfaces, such as toothed surfaces or ribbed surfaces, to engage the input device.
  • the sheave input surface 50 is preferably outwardly directed (away from the rotational axis of the over-running clutch pulley 10) and is preferably substantially cylindrically shaped.
  • the sheave input section 28 is preferably made from conventional structural materials, such as steel, and with conventional methods, but may alternatively be made from other suitable materials and from other suitable methods.
  • the hub output section 36 of the hub member 22 of the first preferred embodiment functions to engage the cylindrical shaft.
  • the hub output section 36 preferably defines a hub output surface 56 with a smooth section 58 and a threaded section 60, which functions to substantially prevent rotation and to axially retain the hub member 22 to the cylindrical shaft.
  • the hub output section 36 may include other suitable devices or define other surfaces to prevent rotational and axial slippage and to engage the cylindrical shaft.
  • the hub output surface 56 is preferably inwardly directed (toward the rotational axis of the over-running clutch pulley 10) and is preferably substantially cylindrically shaped.
  • the hub output section 36 is preferably made from conventional structural materials, such as steel, and with conventional methods, but may alternatively be made from other suitable materials and from other suitable methods.
  • the over-running clutch pulley 10' of the second preferred embodiment includes a modified arrangement of the hub output surface 56' with the smooth section 58' located axially inward and the threaded section 60' is located axially outward. With this arrangement, the tool bores 44 and 46 are located directly radially outward of the threaded section.
  • the over-running clutch pulley of the second preferred embodiment is substantially similar to the over-running clutch pulley of the first preferred embodiment.
  • the sheave clutch section 30 and the hub clutch section 38 of the first preferred embodiment function to provide the sheave clutch surface 32 and the hub clutch surface 40, respectively, for the engagement with the clutch member 26.
  • the sheave clutch section 30 preferably extends radially inward from the sheave member 20.
  • the sheave clutch section 30 is preferably made from the same material and with the same methods as the sheave input section 28, but may alternatively be made from other suitable materials and with other suitable methods.
  • the hub clutch section 38 preferably extends radially outward from and axially over the hub body section 42. In this manner, the hub clutch section 38 is preferably made from the same material and with the same methods as the hub body section 42, but may alternatively be made from other suitable materials and with other suitable methods.
  • the bearing member 66 is a conventional device and, as such, is preferably made from conventional materials and with conventional methods, but may alternatively be made from other suitable materials and with other suitable methods.
  • the clutch member 26 of the first preferred embodiment functions to engage the sheave clutch surface 32 and the hub clutch surface 40 upon the acceleration of the sheave member 20 in a first rotational direction relative to the hub member 22, and to disengage the sheave clutch surface 32 and the hub clutch surface 40 upon the deceleration of the sheave member 20 in the first rotational direction relative to the hub member 22.
  • the clutch member 26 is a coil spring 76.
  • the coil spring 76 which is made from conventional materials and with conventional methods, accomplishes the above features by the particular size and orientation of the coil spring 76.
  • the clutch member 26 may include other suitable devices that accomplish the above features.
  • acceleration of the sheave member 20 in the first rotational direction relative to the hub member 22 will bias an unwinding of the coil spring 76 and deceleration of the sheave member 20 in the first rotational direction relative to the hub member 22 will bias a winding of the coil spring 76.
  • the hub body section 42 of the first preferred embodiment defines a hub front face 78, which faces axially outward after installation of the over-running clutch pulley 10 onto the output shaft.
  • the tool bores 44 and 46 preferably extend axially inward toward the alternator of the vehicle from the hub front face 78, such that the tool bores 44 and 46 are accessible.
  • the tool bores 44 and 46 are also preferably located radially inward from the sheave clutch surface 32 and the hub clutch surface 40, and radially outward from the hub output surface 56.
  • the tool bores 44 and 46 are preferably diametrically opposed about the hub output surface 56, the tool bores 44 and 46 may alternatively be located in any suitable location radially outward from the hub output surface 56. Further, in an alternative embodiment, the hub front face 78 may define more than two tool bores located radially outward from the hub output surface 56. [0029] As shown in FIGURE 4, the tool bores 44 and 46 are formed to engage two projecting lugs 80 and 82 of a first tool 84. When the projecting lugs 80 and 82 are inserted into the tool bores 44 and 46, the first tool 84 may be pivoted to rotational drive the hub member 22 onto the externally threaded output shaft, thereby installing the over-running clutch pulley 10 to the alternator.
  • the first tool 84 is a conventional spanner wrench 86, which includes a clearance bore 88.
  • the clearance bore 88 of the spanner wrench 86 allows a second tool 90 to be passed through the spanner wrench 86.
  • the second tool 90 is a double-female socket 92 that engages a ratchet (not shown) at one end 94 and engages a double-male socket 96 at the other end
  • the double-male socket 96 is preferably shaped to engage a complementary female surface of the output shaft.
  • the second tool 90 may be inserted radially inward of the hub output surface and coupled to the output shaft.
  • the first tool 84 and the second tool 90 may be pivoted relative to each other.
  • the output shaft is held with the second tool 90, while the hub member 22 is tightened onto the output shaft with the first tool 84.
  • the over-running clutch pulley of the third preferred embodiment includes modified tool bores 44' and 46', which extend axially inward from the hub front face 78' and extend to the hub output surface 56.
  • the tool bores 44' and 46' and drilled into the hub body section 42' and then the hub output surface 56 is machined until the tool bores 44' and 46' adopt a semi-circular shape.
  • the tool bores 44' and 46' preferably engage two projecting lugs of a modified first tool (not shown) and allow driving of the hub member 22' by the modified first tool.
  • the over-running clutch pulley of the fourth preferred embodiment includes a modified hub front face 78" with multiple serrations
  • the serrations 99 preferably frictionally engage a first tool (not shown) and allow driving of the hub member 22" by the first tool.
  • the serrations 99 are preferably located along a radial pattern, but may alternatively be located in any suitable location.
  • the serrations are elongated indentations, but may alternatively be small raised bumps or other friction-enhancing surface treatments.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pulleys (AREA)
  • Mechanical Operated Clutches (AREA)

Abstract

L'invention concerne une poulie de roue libre qui sert en mettre en prise un dispositif d'entrée et un dispositif de sortie, et comprend un élément de poulie, un élément de moyeu, et un élément d'embrayage. L'élément de poulie comprend une section d'entrée adaptée pour mettre en prise le dispositif d'entrée et une surface d'embrayage. L'élément de moyeu, qui est situé de façon sensiblement concentrique à l'intérieur de l'élément de poulie, comprend une section de sortie de moyeu adaptée pour mettre en prise le dispositif de sortie et la surface d'embrayage du moyeu. L'élément d'embrayage est adaptée pour mettre en prise la surface d'embrayage de la poulie et la surface d'embrayage du moyeu lorsque l'élément de poulie est accéléré dans un premier sens de rotation relativement à l'élément de moyeu, et pour désacoupler la surface d'embrayage de la poulie et la surface d'embrayage du moyeu lorsque l'élément de poulie est décéléré dans le premier sens de rotation. L'élément de moyeu comprend en outre une section de corps de moyeu qui délimite deux alésages de l'outil formés pour mettre en prise deux ergots saillants d'un outil.
PCT/US2001/050568 2000-12-27 2001-12-21 Poulie de roue libre munie d'alesages de l'outil WO2002052162A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US25841800P 2000-12-27 2000-12-27
US60/258,418 2000-12-27

Publications (3)

Publication Number Publication Date
WO2002052162A2 true WO2002052162A2 (fr) 2002-07-04
WO2002052162A9 WO2002052162A9 (fr) 2002-12-05
WO2002052162A3 WO2002052162A3 (fr) 2004-04-15

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2001/050568 WO2002052162A2 (fr) 2000-12-27 2001-12-21 Poulie de roue libre munie d'alesages de l'outil

Country Status (1)

Country Link
WO (1) WO2002052162A2 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4460076A (en) * 1981-05-12 1984-07-17 Matsushita Electric Industrial Co., Ltd. Electromagnetic spring clutch
US4725260A (en) * 1987-03-24 1988-02-16 Litens Automotive Inc. Belt tensioner with spring actuated band brake damping
US5139463A (en) * 1991-06-05 1992-08-18 Litens Automotive Partnership Serpentine drive with coil spring alternator connection
US5598913A (en) * 1995-06-07 1997-02-04 Ntn Corporation One-way over-running clutch pulley

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4460076A (en) * 1981-05-12 1984-07-17 Matsushita Electric Industrial Co., Ltd. Electromagnetic spring clutch
US4725260A (en) * 1987-03-24 1988-02-16 Litens Automotive Inc. Belt tensioner with spring actuated band brake damping
US5139463A (en) * 1991-06-05 1992-08-18 Litens Automotive Partnership Serpentine drive with coil spring alternator connection
US5598913A (en) * 1995-06-07 1997-02-04 Ntn Corporation One-way over-running clutch pulley

Also Published As

Publication number Publication date
WO2002052162A3 (fr) 2004-04-15
WO2002052162A9 (fr) 2002-12-05

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