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WO2018129613A1 - Fixation d'un dispositif de poulie sur un arbre au moyen d'un collier de blocage comprenant une structure de calage - Google Patents

Fixation d'un dispositif de poulie sur un arbre au moyen d'un collier de blocage comprenant une structure de calage Download PDF

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Publication number
WO2018129613A1
WO2018129613A1 PCT/CA2018/050016 CA2018050016W WO2018129613A1 WO 2018129613 A1 WO2018129613 A1 WO 2018129613A1 CA 2018050016 W CA2018050016 W CA 2018050016W WO 2018129613 A1 WO2018129613 A1 WO 2018129613A1
Authority
WO
WIPO (PCT)
Prior art keywords
shaft
connection structure
adapter
shaft adapter
fastener
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.)
Ceased
Application number
PCT/CA2018/050016
Other languages
English (en)
Inventor
Jordan COOK
Evan Hurry
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.)
Litens Automotive Partnership
Litens Automotive Inc
Original Assignee
Litens Automotive Partnership
Litens Automotive Inc
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 Litens Automotive Partnership, Litens Automotive Inc filed Critical Litens Automotive Partnership
Publication of WO2018129613A1 publication Critical patent/WO2018129613A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/18—Means for guiding or supporting belts, ropes, or chains
    • F16H7/20—Mountings for rollers or pulleys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K25/00—Auxiliary drives
    • B60K25/02—Auxiliary drives directly from an engine shaft
    • 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
    • F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
    • F16D1/08—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key
    • F16D1/09—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with radial clamping due to axial loading of at least one pair of conical surfaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B67/00—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for
    • F02B67/04—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus
    • F02B67/06—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus driven by means of chains, belts, or like endless members
    • 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
    • F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
    • F16D1/08—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key
    • F16D1/09—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with radial clamping due to axial loading of at least one pair of conical surfaces
    • F16D2001/0903—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with radial clamping due to axial loading of at least one pair of conical surfaces the clamped shaft being hollow

Definitions

  • This disclosure relates to field of pulley devices such as fixed pulleys, isolators and TVDs (Torsional Vibration Dampers), and in particular to a method of attaching an isolator to a drive shaft, for example an engine crankshaft or a motor-generator unit (MGU) shaft.
  • a drive shaft for example an engine crankshaft or a motor-generator unit (MGU) shaft.
  • MGU motor-generator unit
  • Isolators are known devices that are installed in accessory drive systems, on engine crankshafts and/or on accessory drive shafts for reducing the transmission of torsional vibrations from the crankshaft to a belt driven by the crankshaft and/or from the belt to the accessory drive shaft.
  • the accessory drive system is operated in a first mode where the accessory drive belt is driven by the engine crankshaft and in turn drives the accessories, and in a second mode where the MGU drives the belt, which in turn drives the accessories (referred to as ISAF - Idle/Stop Accessory Function) and/or drives the engine crankshaft (such as during a BAS (Belt-Alternator Start) event, or a boost event where the MGU supplies additional power to the engine via the belt).
  • the isolator operates to transfer torque from the belt to a shaft in one mode, and operates to transfer torque from the shaft to the belt in the other mode.
  • a pulley device assembly includes a pulley and has a shaft adapter that has a bore extending from a first axial end of the shaft adapter to a second axial end of the shaft adapter.
  • the pulley device further includes a shaft adapter shoulder proximate the first axial end, a first shaft adapter connection structure which is threaded and is in the bore, and a second shaft adapter connection structure.
  • the drive shaft includes a shaft axial end, a shaft shoulder, a first shaft connection structure which is threaded, a second shaft connection structure which is threaded and a third shaft connection structure which is an axial end face of the drive shaft, wherein the first shaft adapter connection structure and the first shaft connection structure are engaged with one another to provide a first non-destructively releasable connection.
  • the pulley device further includes a jam collar having a jam collar wedging structure that is generally conical, a jam collar radially outer structure, and a jam collar axial connection structure.
  • the pulley device further includes a threaded fastener having a threaded fastener wedging structure that is generally conical, and a second fastener connection structure which is threaded and which engages the second shaft connection structure to provide a second non-destructively releasable connection.
  • the threaded fastener wedging structure engages the jam collar wedging structure to drive frictional engagement between the jam collar radially outer structure and the second shaft adapter connection structure, and to drive frictional engagement between the jam collar axial connection structure and the third shaft connection structure, thereby locking the shaft and the shaft adapter against relative rotation in a second rotational direction.
  • the pulley device includes a pulley and has a shaft adapter that has a bore extending from a first axial end of the shaft adapter to a second axial end of the shaft adapter.
  • the pulley device further includes a shaft adapter shoulder proximate the first axial end, a first shaft adapter connection structure which is threaded and is in the bore, and a second shaft adapter connection structure, the drive shaft including a shaft axial end, a shaft shoulder, a first shaft connection structure which is threaded, and a second shaft connection structure which is threaded and a third shaft connection structure which is at the shaft axial end.
  • the method comprises:
  • the jam collar has a jam collar wedging structure that is generally conical, a jam collar radially outer structure, and a jam collar axial connection structure;
  • Figure 1 is a side view of an engine in a vehicle containing an isolator on a shaft of an MGU (motor generator unit), according to non-limiting embodiments.
  • MGU motor generator unit
  • Figure 2 is a perspective view of an example of the isolator shown in Figure 1.
  • Figure 3 is a perspective exploded view of the isolator shown in Figure 2, including a shaft adapter and connected to a shaft of the MGU, with a portion cut away.
  • Figures 4-14 are perspective cutaway views that illustrate the assembling of the isolator to the shaft of the MGU.
  • Figure 15 is a sectional side view of a portion of the assembly formed by the isolator and the shaft.
  • Figure 16 is a sectional side view of the assembly formed by the isolator and the shaft, showing forces and torques along the length of the shaft adapter.
  • Figure 17 is a graph showing average breakaway torques for assemblies as described herein and for assemblies that do not incorporate a jam collar as described herein.
  • Figure 18 is a graph showing breakaway torque relative to angular displacement for an assembly as described herein and for an assembly that does not incorporate a jam collar as described herein.
  • Figure 19 is a sectional exploded elevation view of a portion of the assembly shown in Figure 3.
  • Figure 20 is a sectional view of a jam collar that is part of the assembly shown in Figure 3 illustrating forces acting thereon.
  • FIG. 1 shows an isolator 10 for transferring power in an accessory drive system 20, between an endless drive member 30, such as an accessory drive belt, that is driven by a crankshaft pulley 32 mounted on a crankshaft 34 of an engine 40, and a shaft 42 of an MGU (motor generator unit) 44.
  • the isolator 10 is shown as being mounted on the drive shaft 42 of the MGU 44, and serves to isolate the MGU 44 from torsional vibrations in the endless drive member 30 that commonly occur in internal combustion engines.
  • the endless drive member 30 may be referred to as a belt for readability, however, it will be understood that any other suitable endless drive member may be used.
  • the accessory drive system 20 may include other accessory drive shafts including, for example, the drive shaft 46 of an air conditioning compressor 48.
  • the isolator 10 is useful in any engine, but is particularly useful in an engine that incorporates a BAS (belt-alternator start) system, in which the engine 40 is initially started normally (e.g. using a starter motor) but is shut down for brief periods (e.g. while the vehicle is at a stoplight) and then restarted by driving the crankshaft 34 via the belt 30.
  • the belt 30 would be driven by the MGU 44.
  • the MGU 44 may be replaced by an alternator and a separate motor may be used to drive the belt 30 during BAS events.
  • torque is sometimes transferred from the belt 30 to the MGU drive shaft 42 through the isolator 10, and is sometimes transferred to the belt 30 from the MGU drive shaft 42 through the isolator 10.
  • the isolator 10 includes a shaft adapter 52, a rotary drive member 54, and a spring arrangement 56.
  • the shaft adapter 52 is used to mount the isolator 10 to the drive shaft 42, so as to form an assembly between isolator 10 and the drive shaft 42.
  • An example shaft adapter 52 is described further below.
  • the rotary drive member 54 may be any suitable type of rotary drive member such as a pulley.
  • the rotary drive member 54 may be referred to as a pulley 54 for readability, in much the same way that the endless drive member 30 may be referred to as a belt 30, however it will be understood that any other suitable rotary drive member may be used.
  • the spring arrangement 56 includes at least one spring.
  • the spring arrangement includes two primary, outer, arcuate, helical compression springs 58 and two secondary, inner, arcuate, helical compression springs 60 that are nested in the two outer springs 58 and operate in parallel with the springs 58.
  • the springs 58 and 60 may generally be arranged to exhibit polar symmetry about the axis of rotation of the isolator 10, shown at A. Other types of springs may alternatively or additionally be used in the spring arrangement 56.
  • the springs 58 and 60 may sit inside a spring shell 62 that is formed from spring shell portions 62a, 62b, 62c and 62d.
  • the spring shell 62 forms part of the pulley 54.
  • the outer springs 58 each have a first spring end 58a and a second spring end 58b, while the inner springs 60 each have a first spring end shown at 60a and a second spring end 60b.
  • the shaft adapter 52 has a spring driver member 64 that has a plurality of first adapter spring drive surfaces 66 and second adapter drive surfaces 68 thereon for engagement with the springs 58 and 60.
  • the pulley 54 includes a plurality of first pulley spring drive surfaces 70 and second pulley spring drive surfaces 72, for engagement with the ends 58a and 60 of the springs 58 and 60.
  • torque is applied to the pulley 54 from the belt 30 and may then be transferred from the pulley 54 through the spring arrangement 56 into the shaft adapter 52, and finally from the shaft adapter 52 into the drive shaft 42.
  • torque is applied to the shaft adapter 52 from the drive shaft 42 of the MGU 44 ( Figure 1 ) and is applied from the shaft adapter 52 through the spring arrangement 56 to the pulley 54, and from the pulley 54 to the belt 30.
  • torque 58a is transmitted from the first pulley spring drive surfaces 70 to the first spring ends (and 60a if the torque is sufficiently high), and from the second spring ends 58b (and 60b if the torque is high enough) to the first adapter spring drive surfaces 68, into the shaft adapter 52 and into the shaft 42.
  • torque is transmitted from the shaft 42, into shaft adapter 52, from the second adapter spring drive surfaces 66 which are on the shaft adapter 52 into the second spring ends 58b (and 60b if the torque is sufficiently high), and from the first spring ends 58a (and 60a if the torque is high enough) to the second pulley spring drive surfaces 72.
  • the pulley 54 moves rotationally relative to the shaft adapter 52 in one direction or the other based on which way torque is being transferred.
  • a bushing 74 may be provided between a pulley rotation surface 76 and a shaft adapter rotation surface 78.
  • a suitable pulley device may, for example be as shown and described in PCT publication WO2012061930A1 (which shows a pulley device incorporating a helical torsion spring), or as shown and described in PCT publication WO2015027325A1 (which shows a pulley device incorporating arcuate helical compression springs), the contents of both of which are incorporated fully herein by reference. Accordingly, for readability, the isolator 10 as herein represented is generalized, that is presented without limiting detail, as shown for example in Figure 4.
  • the drive shaft 42 is shown in Figure 4 in section, and the completed assembly of the drive shaft 42 and the isolator 10 is shown in section in Figure 14.
  • the drive shaft 42 has a shaft axial end 80, a shaft shoulder 82, a first shaft connection structure 84 and a second shaft connection structure 86.
  • the first shaft connection structure 84 includes an outside surface of the shaft 42 and is threaded with, for example, a right hand thread (as is typical for threaded elements).
  • the second shaft connection structure 86 may include a radially inner surface of the shaft 42, and is also threaded.
  • the second shaft connection structure 86 is provided with a thread oriented in the opposite direction to the first shaft connection structure 84.
  • the second shaft connection structure 86 is provided with a left hand thread in the example shown.
  • the threads of the first and second shaft connection structures 84, 86 are represented without showing actual thread flights.
  • the drive shaft 42 may further include a shaft tool receiving structure 88, which may, for example, be a hex- shaped aperture at the axial end 80, which receives a shaft tool 90 (see Figure 7).
  • the drive shaft 42 also supports a bearing member 92.
  • the isolator 10 as shown in Figures 4-14 does not present the various components enclosed by the spring shell 62.
  • the simplified isolator 10 as presented includes the shaft adaptor 52, the rotary drive member 54 and the spring shell 62.
  • the shaft adapter 52 has a bore 94 extending from a first axial end 96 of the shaft adapter 52 to a second axial end 98 of the shaft adapter 52.
  • the isolator 10 further includes a shaft adapter shoulder 100 proximate the first axial end 96, and a first shaft adapter connection structure 102 that is in the bore 94.
  • the first shaft adapter connection structure 102 is threaded and is configured to mate with the first shaft connection structure 84 (and which may therefore also have a right hand thread), so as to form a first, nondestructive ⁇ releasable connection between the shaft adapter 52 and the shaft 42, as shown in Figure 5.
  • the shaft adapter 52 also provides a second shaft adapter connection structure 104 in the bore 94.
  • the second shaft adapter connection structure 104 may be configured as an unthreaded extension of the first shaft adapter connection structure 102.
  • the second shaft adapter connection structure 104 is configured to cooperate with a jam collar 1 10 and a threaded fastener 1 12 (best seen in the assembled side sectional view of Figure 15) to provide a second connection between the shaft adapter 52 and the shaft 42.
  • the second connection is, like the first connection, non-destructively releasable.
  • the jam collar 110 has a first jam collar connection structure 1 14 (which may be referred to as a jam collar radially outer connection structure 1 14) that engages the second shaft adapter connection structure 104, and a second jam collar connection structure 1 16 (which may be referred to as a jam collar axial connection structure 1 16) that engages an axial end face 1 18 of the shaft axial end 80 of the shaft 42.
  • the jam collar 1 10 also provides a third jam collar connection structure 120 (which may be referred to as a jam collar wedging structure 120) which cooperates with a first fastener connection structure 122 of the threaded fastener 1 12 (which may be referred to as a threaded fastener wedging structure 122 and which is generally conical).
  • the jam collar wedging structure 120 has a generally conical shape.
  • the threaded fastener 1 12 provides a second fastener connection structure 124 that is threaded and is configured to mate with the second shaft connection structure 86 (and which may therefore also have a left hand thread), so as to form the second, non- destructively releasable connection between the shaft adapter 52 and the shaft 42.
  • a tightening engagement at the second fastener connection structure 124 and the second shaft connection structure 86 serves to frictionally lock the interface between the second shaft adapter connection structure 104 of the shaft adapter 52 and the first jam collar connection structure 1 14 of the jam collar 1 10.
  • the threaded fastener 1 12 further includes a fastener tool receiving structure 130 (e.g. a hex-shaped aperture) that is shaped to receive a fastener tool 132 ( Figure 12).
  • a fastener tool receiving structure 130 e.g. a hex-shaped aperture
  • the shaft adapter 52 may further include a shaft adapter tool receiving structure 126, which may, for example, include a toothed portion that engages a shaft adapter tool 128 ( Figure 7) that has a mating toothed portion.
  • a shaft adapter tool receiving structure 126 may, for example, include a toothed portion that engages a shaft adapter tool 128 ( Figure 7) that has a mating toothed portion.
  • Figures 4-14 illustrate a method of assembling the assembly formed by the shaft 42 and the shaft adapter 52 and therefore of the assembly formed by the shaft 42 and the isolator 10.
  • the shaft 42 and the bearing member 92 are shown in isolation.
  • the shaft adapter 52 and therein the isolator 10 is mounted to the shaft 42 by inserting the shaft axial end 80 into the bore 94 and causing relative rotation between the shaft 42 and the shaft adapter 52 in the first rotational direction to engage the first shaft adapter connection structure 102 and the first shaft connection structure 84 with one another to provide the first connection.
  • the jam collar 1 10 is inserted into the opposing end of the bore 94 of the shaft adapter 52.
  • the jam collar 1 10 is positioned to engage the first jam collar connection structure 1 14 with the second shaft adapter connection structure 104, and the second jam collar connection structure 1 16 with the axial end face 1 18 of the shaft axial end 80 of the shaft 42.
  • the shaft adapter tool 128 is first inserted into the bore 94 of the shaft adapter 52.
  • the shaft adapter tool 128 is seated within the bore 94 such that the toothed portion of the shaft adapter tool 128 engages the mating toothed portion of the shaft adapter tool receiving structure 126, therein rotationally locking together the shaft adapter tool 128 and the shaft adapter 52.
  • the shaft tool 90 is inserted through an aperture in the shaft adapter tool 128.
  • the shaft tool 90 is seated such that it engages the shaft tool receiving structure 88 at the axial end 80 of the shaft 42. As such, the shaft tool 90 is rotationally locked relative to the shaft 42.
  • the first connection that is the connection between the shaft adapter 52 and the shaft 42 at the first shaft connection structure 86 and the first shaft adapter connection structure 102 is tightened by rotating the shaft adapter tool 128 relative to the shaft tool 90.
  • the shaft adapter tool 128 With the right-hand thread provided at the first connection, the shaft adapter tool 128 is shown as being rotated clockwise relative to the stationary shaft tool 90.
  • the extent to which the first connection is tightened is determined by the desired compression force to be established between the shaft shoulder 82 and the shaft adapter shoulder 100, through the intermediate bearing member 92 arranged therebetween.
  • the shaft adapter tool 128 and the shaft tool 90 are removed, and as shown in Figure 10, the threaded fastener 1 12 is inserted into the bore 94 of the shaft adapter 52.
  • the threaded fastener 1 12 is positioned to engage the second fastener connection structure 124 with the corresponding second shaft connection structure 86 on the shaft axial end 80 of the shaft 42.
  • Figure 1 1 illustrates reinsertion of the shaft adapter tool 128 to rotationally lock the shaft adapter tool 128 relative to the shaft adapter 52.
  • the fastener tool 132 is inserted through the aperture in the shaft adapter tool 128.
  • the fastener tool 132 is seated such that it engages the fastener tool receiving structure 130 provided on the threaded fastener 1 12. As such, the fastener tool 132 is rotationally locked relative to the threaded fastener 1 12.
  • the second connection that is the connection between the shaft adapter 52 and the shaft 42 via the threaded fastener 1 12 and jam collar 110 is tightened by rotating the fastener tool 132 relative to the shaft adapter tool 128.
  • the fastener tool 132 With the left-hand thread provided at the second connection, the fastener tool 132 is shown as being rotated counter-clockwise relative to the stationary shaft adapter tool 128.
  • FIG. 16 Shown in Figure 16 are torque values used in some embodiments at different stages of assembling, and some forces that exist in the completed assembly.
  • the torque curve shown at 200 presents the torque distribution during the assembly of the first connection at the step shown in Figure 8.
  • the compressive load distribution and break-away torque of the first connection are presented at the curves shown at 210 and 220, respectively.
  • the torque curve shown at 230 presents the torque distribution during the assembly of the second connection at the step shown in Figure 12.
  • the total compressive load distribution and break-away torque are presented at the curves shown at 240 and 250, respectively.
  • Figures 17 and 18 show a comparison of a connection structure in accordance with the present disclosure and a standard bolted connection.
  • Figure 17 shows a distribution curve 300 of the breakaway torque of several samples of a bolted connection that does not incorporate the jam collar 1 10, and a distribution curve 302 of the breakaway torque of several samples of a connection in accordance with the present disclosure, where the breakaway torque is the torque needed to loosen the connection with the drive shaft 42.
  • the average breakaway torque for the bolted connection without the jam collar 1 10 is about 120Nm
  • the average breakaway torque for a connection in accordance with the present disclosure is about 134Nm.
  • Figure 18 shows the breakaway torque over a range of angular displacements between the shaft adapter and the shaft 42 for both a bolted connection without the jam collar 1 10 (shown at 304) and for a connection in accordance with the present disclosure (shown at 306).
  • the breakaway torque see curve 304
  • the breakaway torque oscillates, generally decreasing, but then increases again and remains above about 36 Nm over a large angular range.
  • Figure 19 provides an exploded view of components of the assembly in accordance with the present disclosure
  • Figure 20 shows a sectional view of the jam collar 1 10 with the forces acting thereon.
  • the theoretical torque holding capacity for the assembly can be calculated as follows:
  • T: Ff x r
  • T2: Ff2 x r2
  • T is the resistive torque applied between the jam collar 1 10 and the shaft adapter 52 for resisting slippage of the jam collar 1 10 relative to the shaft adapter 52
  • T2 is the resistive torque applied between the jam collar 1 10 and the shaft end 80 for resisting slippage of the shaft end 80 relative to the jam collar 1
  • Ff and Ff2 are the forces of friction at the interfaces between the jam collar 1 10 and the shaft adapter 52, and between the jam collar 110 and the shaft end 80, respectively. It is the frictional forces Ff and Ff2 that result in the resistive torques T and T2.
  • MU is the coefficient of friction between the jam collar 110 and the shaft adapter 52, and is also the coefficient of friction between the jam collar 110 and the shaft end 80.
  • r is the radius of the outer face of the jam collar, as shown in Figure 19.
  • r2 is the radius at the radially innermost end of the threaded fastener wedging structure 122 as shown in Figure 19.
  • a is the angle of the jam collar wedging structure 120 relative to the axis A as shown in Figure 19 (or alternatively and equivalently, as shown in Figure 20, relative to the outer surface of the jam collar 1 10, in those embodiments in which the outer surface is parallel to the axis A).
  • the forces Fn and Fn2 are, respectively, the normal forces that are applied at the aforementioned interfaces, which result in the aforementioned frictional forces.
  • the design geometry can be optimized to gain additional torque holding by controlling Fcl, a, MU, r and r2.
  • the assembly shown herein relates to an isolator, however it will be understood that the isolator is but an example of a suitable pulley device, and that the assembly may be used with other types of pulley device, such as a fixed pulley or a pulley with decoupling capability in addition to or instead of isolation capability.
  • the pulley device (e.g. the isolator 10) includes a pulley and has a shaft adapter that has a bore extending from a first axial end of the shaft adapter to a second axial end of the shaft adapter, wherein the pulley device further includes a shaft adapter shoulder proximate the first axial end, a first shaft adapter connection structure which is threaded and is in the bore, and a second shaft adapter connection structure, the drive shaft including a shaft axial end, a shaft shoulder, a first shaft connection structure which is threaded, and a second shaft connection structure which is threaded and a third shaft connection structure which is at the shaft axial end.
  • the method 400 includes inserting the shaft axial end into the bore and causing relative rotation between the shaft and the shaft adapter in a first rotational direction to engage the first shaft adapter connection structure and the first shaft connection structure with one another to provide a first non-destructively releasable connection.
  • the method 400 includes inserting a jam collar into the bore, wherein the jam collar has a jam collar wedging structure that is generally conical, a jam collar radially outer structure, and a jam collar axial connection structure.
  • the method 400 includes providing a threaded fastener with a fastener wedging structure and a second fastener connection structure.
  • the method 400 includes connecting the second fastener connection structure to the second shaft connection structure to provide a second non-destructively releasable connection, such that the fastener wedging structure engages the jam collar wedging structure to generate a selected first frictional force between the jam collar radially outer structure and the second shaft adapter connection structure, and a selected second frictional force between the jam collar axial connection structure and the third shaft connection structure.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Pulleys (AREA)

Abstract

Un aspect de l'invention concerne un dispositif de poulie pour un arbre d'entraînement comprenant une poulie, un adaptateur d'arbre comprenant un alésage s'étendant d'une première à une seconde extrémité axiale et un épaulement d'adaptateur d'arbre à proximité de la première extrémité axiale, une première structure de raccordement d'adaptateur d'arbre fileté dans l'alésage et une seconde structure de raccordement d'adaptateur d'arbre. Le dispositif de poulie comprend en outre un collier de blocage comprenant une structure de calage de collier de blocage. Le dispositif de poulie comprend en outre un élément de fixation fileté comprenant une structure de calage d'élément de fixation. La structure de calage d'élément de fixation entre en prise avec la structure de calage de collier de blocage pour entraîner une entrée en prise par frottement entre une structure radialement externe de collier de blocage et la seconde structure de raccordement d'adaptateur d'arbre et pour entraîner une entrée en prise par frottement entre une structure de raccordement axial de collier de blocage et une structure de raccordement d'arbre sur l'arbre d'entraînement, ce qui permet de verrouiller l'arbre et l'adaptateur d'arbre contre une rotation relative dans une seconde direction de rotation.
PCT/CA2018/050016 2017-01-16 2018-01-09 Fixation d'un dispositif de poulie sur un arbre au moyen d'un collier de blocage comprenant une structure de calage Ceased WO2018129613A1 (fr)

Applications Claiming Priority (2)

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US201762446589P 2017-01-16 2017-01-16
US62/446,589 2017-01-16

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WO2018129613A1 true WO2018129613A1 (fr) 2018-07-19

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Citations (7)

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Publication number Priority date Publication date Assignee Title
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EP2110573A1 (fr) * 2007-08-06 2009-10-21 Guerriero Funari Dispositif à démontage rapide de blocage complet sur un arbre d'une poulie
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US20100133962A1 (en) * 2008-11-28 2010-06-03 Schaeffler Kg Shaft-hub connection between a belt pulley and a generator shaft as well as belt-driven starter generator with such a shaft-hub connection
WO2016188724A1 (fr) * 2015-05-22 2016-12-01 Robert Bosch Gmbh Dispositif d'entraînement et procédé de réalisation d'une liaison bloquée en rotation d'un dispositif d'entraînement

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5735762A (en) * 1995-03-08 1998-04-07 Robert Bosch Gmbh Pulley, in particular free-running pulley
WO1996030664A1 (fr) * 1995-03-27 1996-10-03 Colmant Cuvelier Moyeu amovible pour le montage d'un organe tournant sur un arbre d'entrainement, et organe tournant equipe d'un tel moyeu amovible
US20050119077A1 (en) * 2002-03-22 2005-06-02 Guy Faucon Assembly and method of assembling a motor vehicle alternator pulley and a motor vehicle alternator comprising one such assembly
EP2110573A1 (fr) * 2007-08-06 2009-10-21 Guerriero Funari Dispositif à démontage rapide de blocage complet sur un arbre d'une poulie
US20100133962A1 (en) * 2008-11-28 2010-06-03 Schaeffler Kg Shaft-hub connection between a belt pulley and a generator shaft as well as belt-driven starter generator with such a shaft-hub connection
DE202010001720U1 (de) * 2010-02-01 2010-05-20 Boda, Georg Friedrich Integrierte Lösevorrichtung für konische Wellen-/Nabenspannhülsen
WO2016188724A1 (fr) * 2015-05-22 2016-12-01 Robert Bosch Gmbh Dispositif d'entraînement et procédé de réalisation d'une liaison bloquée en rotation d'un dispositif d'entraînement

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