US20170328443A1 - Isolating decoupler - Google Patents

Isolating decoupler Download PDF

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Publication number
US20170328443A1
US20170328443A1 US15/154,678 US201615154678A US2017328443A1 US 20170328443 A1 US20170328443 A1 US 20170328443A1 US 201615154678 A US201615154678 A US 201615154678A US 2017328443 A1 US2017328443 A1 US 2017328443A1
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United States
Prior art keywords
pulley
bearing
shaft
belt
torsion spring
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Granted
Application number
US15/154,678
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US9797469B1 (en
Inventor
Alexander Serkh
Ilya Kleyman
Essie Rahdar
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.)
Gates Corp
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Gates Corp
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Publication date
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Priority to US15/154,678 priority Critical patent/US9797469B1/en
Assigned to GATES CORPORATION reassignment GATES CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SERKH, ALEXANDER
Assigned to GATES CORPORATION reassignment GATES CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KLEYMAN, ILYA
Assigned to GATES CORPORATION reassignment GATES CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: RAHDAR, ESSIE
Priority to JP2018558227A priority patent/JP6656420B2/en
Priority to EP17723203.0A priority patent/EP3455515B1/en
Priority to CA3023311A priority patent/CA3023311C/en
Priority to AU2017262993A priority patent/AU2017262993B2/en
Priority to KR1020187035781A priority patent/KR102283406B1/en
Priority to MX2018013725A priority patent/MX2018013725A/en
Priority to CN201780029438.4A priority patent/CN109154332B/en
Priority to PCT/US2017/030432 priority patent/WO2017196574A1/en
Priority to BR112018073145-5A priority patent/BR112018073145A2/en
Publication of US9797469B1 publication Critical patent/US9797469B1/en
Application granted granted Critical
Publication of US20170328443A1 publication Critical patent/US20170328443A1/en
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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
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/02—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive adapted to specific functions
    • F16D3/12—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive adapted to specific functions specially adapted for accumulation of energy to absorb shocks or vibration
    • 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
    • F16D13/00—Friction clutches
    • F16D13/76—Friction clutches specially adapted to incorporate with other transmission parts, i.e. at least one of the clutch parts also having another function, e.g. being the disc of a pulley
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
    • F16F15/12—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon
    • F16F15/121—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon using springs as elastic members, e.g. metallic springs
    • F16F15/1216—Torsional springs, e.g. torsion bar or torsionally-loaded coil springs
    • 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
    • F16D3/72—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 with axially-spaced attachments to the coupling parts
    • 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
    • F16D41/06—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface
    • F16D41/064—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface the intermediate members wedging by rolling and having a circular cross-section, e.g. balls
    • F16D41/066—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface the intermediate members wedging by rolling and having a circular cross-section, e.g. balls all members having the same size and only one of the two surfaces being cylindrical
    • 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
    • F16H—GEARING
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/32—Friction members
    • F16H55/36—Pulleys
    • 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
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H7/0827—Means for varying tension of belts, ropes, or chains for disconnecting the drive
    • 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
    • F16H—GEARING
    • F16H9/00—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members
    • F16H9/02—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion
    • F16H9/04—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using belts, V-belts, or ropes

Definitions

  • the invention relates to an isolating decoupler, and more particularly, to an isolating decoupler comprising a single bearing disposed between the shaft and the pulley, the bearing comprising a radial centerline, the radial centerline aligned with a mid-line of the belt bearing portion.
  • gasoline engines are increasing compression ratios to improve the fuel efficiency.
  • diesel and gasoline engine accessory drive systems have to overcome the vibrations of greater magnitude from crankshafts due to above mentioned changes in engines.
  • Crankshaft isolators/decouplers and alternator decouplers/isolators have been widely used for engines with high angular vibration to filter out vibration in engine operation speed range and to also control belt chirp.
  • WO2007121582A1 discloses a one way isolator for high torque devices, such as alternator-starters, driven by a flexible drive means includes a hub and a sheave each of which includes at least one stop member.
  • the hub and sheave are linked by a isolating spring and, via a bearing and/or bushing, can rotate with respect to each other to provide isolation, through the spring, from torque variations when torque is transferred from the flexible drive means to the device.
  • the sheave rotates with respect to the hub to bring the stop members into contact such that the isolator then acts like a solid pulley to facilitate the transfer of the torque from the device.
  • an isolating decoupler comprising a single bearing disposed between the shaft and the pulley, the bearing comprising a radial centerline, the radial centerline aligned with a mid-line of the belt bearing portion.
  • the primary aspect of the invention is an isolating decoupler comprising a single bearing disposed between the shaft and the pulley, the bearing comprising a radial centerline, the radial centerline aligned with a mid-line of the belt bearing portion.
  • the invention comprises an isolating decoupler comprising a shaft, a pulley having a belt bearing portion, a one way clutch, a torsion spring, the torsion spring engaged between the pulley and the one-way clutch, and a single bearing disposed between the shaft and the pulley, the bearing comprising a radial centerline, the radial centerline aligned with a mid-line of the belt bearing portion.
  • FIG. 1 is a cross-sectional view of the device.
  • FIG. 2 is an exploded view of the device.
  • FIG. 3 is a cross-sectional view of an alternate embodiment.
  • FIG. 1 is a cross-sectional view of the device.
  • the isolating decoupler comprises a shaft 10 , pulley 20 , bearing 30 , torsion spring 40 , one-way clutch 50 , spring carrier 60 and dust shield 70 .
  • Pulley 20 comprises a belt bearing portion 21 .
  • Belt bearing portion 21 engages a belt (not shown).
  • the belt may comprise a multi-ribbed belt or single “v” belt.
  • Bearing 30 is press fit into pulley 20 .
  • Engaging portion 31 locates bearing 30 on the end of shaft 10 .
  • Engaging portion 31 comprises a radial projection which prevents axial movement of bearing 30 along shaft 10 once portion 31 contacts shaft 10 . This in turn locates pulley 20 with respect to shaft 10 .
  • a bearing radial centerline CL aligns with the mid-line of belt bearing portion 21 . This alignment allows a belt load BL to be centered on the single bearing 30 , thereby negating the need for a second bearing.
  • End plate 80 is press fit to pulley 20 , but they may also be welded together.
  • End 41 of torsion spring 40 is attached to end plate 80 .
  • End 41 may be attached using welding, adhesives or interference fit. Welding may comprise laser welding.
  • Torsion spring 40 frictionally engages an outer surface of carrier 60 .
  • Carrier 60 comprises a cylindrical form which is press fit to an outer race 51 of one way clutch 50 .
  • End 42 of torsion spring 40 is frictionally engaged to carrier 60 using an interference fit. End 42 may also be welding or fixed by adhesives to carrier 60 .
  • One-way clutch 50 engages shaft 10 .
  • Dust shield 70 prevents debris from entering the device.
  • Bearing 30 comprises seals 32 for preventing debris from entering the bearing.
  • Spacer 90 locates the device 100 on a driven shaft (not shown). Spacer 90 abuts engaging portion 31 thereby fixing the location of bearing 30 with respect to shaft 10 .
  • FIG. 2 is an exploded view of the device.
  • Shoulder 11 locates the one way clutch 50 .
  • Bearing 30 traps one way clutch 50 between bearing 30 and shoulder 11 , thereby preventing axial movement of one way clutch 50 .
  • FIG. 3 is a cross-sectional view of an alternate embodiment.
  • torsion spring 40 is axially displaced 22 along axis A-A so that it is not radially under belt bearing portion 21 , namely, torsion spring 40 is not radially between the belt bearing portion 21 and shaft 10 .
  • Spring 40 has a radius 43 with respect to axis A-A.
  • Axially displacing spring 40 in this embodiment allows radius 23 of belt bearing portion 21 to be minimized. In effect the diameter of the device is governed by belt bearing portion 21 resting directly on the outer race of bearing 30 .
  • Radius 23 may be less than radius 43 , equal to radius 43 or greater than radius 43 as may be required by a user.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Pulleys (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Springs (AREA)

Abstract

An isolating decoupler comprising a shaft, a pulley having a belt bearing portion, a one way clutch, a torsion spring, the torsion spring engaged between the pulley and the one-way clutch, and a single bearing disposed between the shaft and the pulley, the bearing comprising a radial centerline, the radial centerline aligned with a mid-line of the belt bearing portion.

Description

    FIELD OF THE INVENTION
  • The invention relates to an isolating decoupler, and more particularly, to an isolating decoupler comprising a single bearing disposed between the shaft and the pulley, the bearing comprising a radial centerline, the radial centerline aligned with a mid-line of the belt bearing portion.
    • BACKGROUND OF THE INVENTION
  • Diesel engine use for passenger car applications is increasing due to the benefit of better fuel economy.
  • Further, gasoline engines are increasing compression ratios to improve the fuel efficiency. As a result, diesel and gasoline engine accessory drive systems have to overcome the vibrations of greater magnitude from crankshafts due to above mentioned changes in engines.
  • Due to increased crankshaft vibration plus high acceleration/deceleration rates and high alternator inertia the engine accessory drive system is often experiencing belt chirp noise due to belt slip. This will also reduce the belt operating life.
  • Crankshaft isolators/decouplers and alternator decouplers/isolators have been widely used for engines with high angular vibration to filter out vibration in engine operation speed range and to also control belt chirp.
  • Representative of the art is WO2007121582A1 which discloses a one way isolator for high torque devices, such as alternator-starters, driven by a flexible drive means includes a hub and a sheave each of which includes at least one stop member. The hub and sheave are linked by a isolating spring and, via a bearing and/or bushing, can rotate with respect to each other to provide isolation, through the spring, from torque variations when torque is transferred from the flexible drive means to the device. When substantial amounts of torque are transferred from the device to the flexible drive means, the sheave rotates with respect to the hub to bring the stop members into contact such that the isolator then acts like a solid pulley to facilitate the transfer of the torque from the device.
  • What is needed is an isolating decoupler comprising a single bearing disposed between the shaft and the pulley, the bearing comprising a radial centerline, the radial centerline aligned with a mid-line of the belt bearing portion. The present invention meets this need.
    • SUMMARY OF THE INVENTION
  • The primary aspect of the invention is an isolating decoupler comprising a single bearing disposed between the shaft and the pulley, the bearing comprising a radial centerline, the radial centerline aligned with a mid-line of the belt bearing portion.
  • Other aspects of the invention will be pointed out or made obvious by the following description of the invention and the accompanying drawings.
  • The invention comprises an isolating decoupler comprising a shaft, a pulley having a belt bearing portion, a one way clutch, a torsion spring, the torsion spring engaged between the pulley and the one-way clutch, and a single bearing disposed between the shaft and the pulley, the bearing comprising a radial centerline, the radial centerline aligned with a mid-line of the belt bearing portion.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • The accompanying drawings, which are incorporated in and form a part of the specification, illustrate preferred embodiments of the present invention, and together with a description, serve to explain the principles of the invention.
  • FIG. 1 is a cross-sectional view of the device.
  • FIG. 2 is an exploded view of the device.
  • FIG. 3 is a cross-sectional view of an alternate embodiment.
    •  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
  • FIG. 1 is a cross-sectional view of the device. The isolating decoupler comprises a shaft 10, pulley 20, bearing 30, torsion spring 40, one-way clutch 50, spring carrier 60 and dust shield 70.
  • Pulley 20 comprises a belt bearing portion 21. Belt bearing portion 21 engages a belt (not shown). The belt may comprise a multi-ribbed belt or single “v” belt.
  • Bearing 30 is press fit into pulley 20. Engaging portion 31 locates bearing 30 on the end of shaft 10. Engaging portion 31 comprises a radial projection which prevents axial movement of bearing 30 along shaft 10 once portion 31 contacts shaft 10. This in turn locates pulley 20 with respect to shaft 10.
  • A bearing radial centerline CL aligns with the mid-line of belt bearing portion 21. This alignment allows a belt load BL to be centered on the single bearing 30, thereby negating the need for a second bearing.
  • End plate 80 is press fit to pulley 20, but they may also be welded together. End 41 of torsion spring 40 is attached to end plate 80. End 41 may be attached using welding, adhesives or interference fit. Welding may comprise laser welding. Torsion spring 40 frictionally engages an outer surface of carrier 60. Carrier 60 comprises a cylindrical form which is press fit to an outer race 51 of one way clutch 50. End 42 of torsion spring 40 is frictionally engaged to carrier 60 using an interference fit. End 42 may also be welding or fixed by adhesives to carrier 60. One-way clutch 50 engages shaft 10.
  • Dust shield 70 prevents debris from entering the device. Bearing 30 comprises seals 32 for preventing debris from entering the bearing.
  • Spacer 90 locates the device 100 on a driven shaft (not shown). Spacer 90 abuts engaging portion 31 thereby fixing the location of bearing 30 with respect to shaft 10.
  • FIG. 2 is an exploded view of the device. Shoulder 11 locates the one way clutch 50. Bearing 30 traps one way clutch 50 between bearing 30 and shoulder 11, thereby preventing axial movement of one way clutch 50.
  • FIG. 3 is a cross-sectional view of an alternate embodiment. In this embodiment torsion spring 40 is axially displaced 22 along axis A-A so that it is not radially under belt bearing portion 21, namely, torsion spring 40 is not radially between the belt bearing portion 21 and shaft 10. Spring 40 has a radius 43 with respect to axis A-A. Axially displacing spring 40 in this embodiment allows radius 23 of belt bearing portion 21 to be minimized. In effect the diameter of the device is governed by belt bearing portion 21 resting directly on the outer race of bearing 30. Radius 23 may be less than radius 43, equal to radius 43 or greater than radius 43 as may be required by a user.
  • Although forms of the invention have been described herein, it will be obvious to those skilled in the art that variations may be made in the construction and relation of parts without departing from the spirit and scope of the invention described herein.

Claims (5)

1. An isolating decoupler comprising:
a shaft;
a pulley having a belt bearing portion;
a one way clutch;
a torsion spring, the torsion spring connected to the pulley and directly frictionally engaged with an outer surface of the one-way clutch; and
a single bearing disposed between the shaft and the pulley, the bearing comprising a radial centerline, the radial centerline aligned with a mid-line of the belt bearing portion.
2. The isolating decoupler as in claim 1, wherein the torsion spring is axially displaced so it is not radially between the belt bearing portion and the shaft.
3. The isolating decoupler as in claim 1 further comprising a dust shield on the pulley.
4. The isolating decoupler as in claim 1, wherein the torsion spring comprises an end which is welded to the pulley.
5. The isolating decoupler as in claim 1, wherein the single bearing comprises a radial projection which locates the single bearing on the shaft.
US15/154,678 2016-05-13 2016-05-13 Isolating decoupler Active US9797469B1 (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
US15/154,678 US9797469B1 (en) 2016-05-13 2016-05-13 Isolating decoupler
EP17723203.0A EP3455515B1 (en) 2016-05-13 2017-05-01 Isolating decoupler
BR112018073145-5A BR112018073145A2 (en) 2016-05-13 2017-05-01 insulating decoupler
AU2017262993A AU2017262993B2 (en) 2016-05-13 2017-05-01 Isolating decoupler
PCT/US2017/030432 WO2017196574A1 (en) 2016-05-13 2017-05-01 Isolating decoupler
CA3023311A CA3023311C (en) 2016-05-13 2017-05-01 Isolating decoupler
JP2018558227A JP6656420B2 (en) 2016-05-13 2017-05-01 Isolating decoupler
KR1020187035781A KR102283406B1 (en) 2016-05-13 2017-05-01 Isolating Decoupler
MX2018013725A MX2018013725A (en) 2016-05-13 2017-05-01 Isolating decoupler.
CN201780029438.4A CN109154332B (en) 2016-05-13 2017-05-01 Isolation decoupler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US15/154,678 US9797469B1 (en) 2016-05-13 2016-05-13 Isolating decoupler

Publications (2)

Publication Number Publication Date
US9797469B1 US9797469B1 (en) 2017-10-24
US20170328443A1 true US20170328443A1 (en) 2017-11-16

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Application Number Title Priority Date Filing Date
US15/154,678 Active US9797469B1 (en) 2016-05-13 2016-05-13 Isolating decoupler

Country Status (10)

Country Link
US (1) US9797469B1 (en)
EP (1) EP3455515B1 (en)
JP (1) JP6656420B2 (en)
KR (1) KR102283406B1 (en)
CN (1) CN109154332B (en)
AU (1) AU2017262993B2 (en)
BR (1) BR112018073145A2 (en)
CA (1) CA3023311C (en)
MX (1) MX2018013725A (en)
WO (1) WO2017196574A1 (en)

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CN108843771A (en) * 2018-07-18 2018-11-20 台州宝茨汽车零部件有限公司 The isolator belt pulley for reducing resonant frequency is adjusted by axial motion
US20200025260A1 (en) * 2018-07-20 2020-01-23 Gates Corporation Isolating Decoupler
US11028884B2 (en) * 2018-07-20 2021-06-08 Gates Corporation Isolating decoupler
US20210293286A1 (en) * 2018-07-20 2021-09-23 Gates Corporation Isolating Decoupler
US11649888B2 (en) * 2018-07-20 2023-05-16 Gates Corporation Isolating decoupler
US20230167893A1 (en) * 2021-11-30 2023-06-01 Gates Corporation Belt starter generator tuning device
US11867275B2 (en) * 2021-11-30 2024-01-09 Gates Corporation Belt starter generator tuning device

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KR20190005971A (en) 2019-01-16

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