WO1998034053A1 - Ensemble poulie avec connexion moulee - Google Patents

Ensemble poulie avec connexion moulee Download PDF

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Publication number
WO1998034053A1
WO1998034053A1 PCT/CA1998/000063 CA9800063W WO9834053A1 WO 1998034053 A1 WO1998034053 A1 WO 1998034053A1 CA 9800063 W CA9800063 W CA 9800063W WO 9834053 A1 WO9834053 A1 WO 9834053A1
Authority
WO
WIPO (PCT)
Prior art keywords
component
radially
annular
outer component
pulley
Prior art date
Application number
PCT/CA1998/000063
Other languages
English (en)
Inventor
Henry W. Thomey
Original Assignee
Litens Automotive Partnership
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 filed Critical Litens Automotive Partnership
Priority to CA002279896A priority Critical patent/CA2279896C/fr
Priority to AU58501/98A priority patent/AU5850198A/en
Publication of WO1998034053A1 publication Critical patent/WO1998034053A1/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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14467—Joining articles or parts of a single article
    • B29C45/14491—Injecting material between coaxial articles, e.g. between a core and an outside sleeve for making a roll
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/68—Shaping 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
    • B29C70/84—Shaping 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 by moulding material on preformed parts to be joined
    • B29C70/845—Shaping 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 by moulding material on preformed parts to be joined by moulding material on a relative small portion of the preformed 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C13/00—Rolls, drums, discs, or the like; Bearings or mountings therefor
    • F16C13/006—Guiding rollers, wheels or the like, formed by or on the outer element of a single bearing or bearing unit, e.g. two adjacent bearings, whose ratio of length to diameter is generally less than one
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • F16C35/07—Fixing them on the shaft or housing with interposition of an element
    • F16C35/077—Fixing them on the shaft or housing with interposition of an element between housing and outer race ring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C2045/1486—Details, accessories and auxiliary operations
    • B29C2045/14868—Pretreatment of the insert, e.g. etching, cleaning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/32—Wheels, pinions, pulleys, castors or rollers, Rims
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
    • F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2204/00—Metallic materials; Alloys
    • F16C2204/50—Alloys based on zinc
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2220/00—Shaping
    • F16C2220/02—Shaping by casting
    • F16C2220/06—Shaping by casting in situ casting or moulding
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2226/00—Joining parts; Fastening; Assembling or mounting parts
    • F16C2226/30—Material joints
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2361/00—Apparatus or articles in engineering in general
    • F16C2361/63—Gears with belts and pulleys

Definitions

  • the present invention relates generally to a pulley assembly having an improved connection between a radially outer component and a radially inner component.
  • the invention relates more particularly to a pulley assembly having an improved molded connection between a pulley structure and a bearing assembly.
  • the present invention provides a molded structural connection between the pulley and bearing that is simple to accomplish, improves the strength of the connection, is inexpensive to implement, and allows an inexpensive pulley structure component to be utilized.
  • glue or other similar adhesives have been used to connect a pulley structure to the outer race of a ball bearing assembly in a typical pulley assembly.
  • glue or other similar adhesives there must be a thin or non-existent gap between the outer race of the ball bearing assembly and the pulley structure in order to obtain a sufficiently strong adhesive bond.
  • a phenolic pulley is molded and placed about the outer surface of the ball bearing assembly while in an expanded and heated state. Glue is then inserted into the gap between the pulley structure and the ball bearing assembly. The pulley structure then shrinks as it cools to close the gap therebetween.
  • the glue adheres the surfaces of the ball bearing assembly and the pulley structure together.
  • the process according to the present invention comprises the steps of providing an outer component of a pulley assembly having a central opening.
  • the outer component has an inner surface surrounding the central opening.
  • An inner component of the pulley assembly is provided having an outer surface.
  • the inner component is mounted within the central opening of the outer component.
  • the inner and outer component define a molten material receiving space therebetween. Molten material is then injected into the space.
  • the molten material is cooled and forms a locking element.
  • the locking element has radially extending portions providing axial movement limiting surfaces constructed and arranged to prevent axial movement of the outer component and the inner component relative to one another.
  • It is a further object of present invention to provide a pulley assembly comprising an outer component having a central opening.
  • the outer component has an inner surface surrounding the central opening.
  • An inner component has an outer wall and is disposed within the central opening of the outer component.
  • a locking element has radially extending portions on opposing sides thereof providing axial movement limiting surfaces constructed and arranged to prevent axial movement of the outer and inner components relative to one another.
  • a pulley assembly comprising an outer component having a central opening.
  • the central opening has an inner surface surrounding the central opening.
  • An inner component has an outer wall.
  • the inner component is disposed within the central opening of the outer component.
  • a locking element is formed from solidified molten material and has radially extending portions providing axial movement limiting surfaces constructed and arranged to prevent axial movement of the inner and outer components relative to one another.
  • Figure 1 A is a cross sectional view of a pulley structure prior to assembly in accordance with the principles of the present invention
  • Figure 2 is a cross sectional view of the ball bearing assembly and pulley structure disposed in a lower die mold prior to an injection molded connection being provided to connect the ball bearing assembly with the pulley structure;
  • Figure 3 is a cross sectional view similar to the view shown in Figure 2, but further showing an upper die mold disposed in a lowered position during an injection molding operation;
  • Figure 4 is a cross sectional view of a pulley assembly according to the principles of the present invention.
  • Figure 4A is a cross sectional view of the injection molded connection of Figure 4.
  • Figures 5-7 are cross sectional views taken through the injection molded connection for connecting the ball bearing assembly to the pulley structure in accordance with the principles of the present invention.
  • Figure 8 is a cross sectional view similar to Figure 4 showing an alternative embodiment 5 of a pulley assembly according to the principles of the present invention.
  • Figure 1 and 1A are cross sectional views of an inner component in the form of a ball bearing assembly, generally indicated at 10, and an outer component in the form of a pulley structure, generally indicated at 12, prior to such components being connected to one another.
  • the ball bearing assembly 10 is conventional and includes an annular inner steel race 14, an annular outer steel race 16, and a plurality of steel ball elements 18 disposed therebetween.
  • the inner race 14 has an exterior surface comprising a substantially cylindrical surface portion 20 and radially outwardly flared arcuate surface portions 22 and 24 extending from opposite ends of the cylindrical surface portion 20.
  • the outer race 16 has an exterior surface
  • arcuate surface portions 32 and 34 comprising a main cylindrical surface portion 30, and arcuate surface portions 32 and 34 extending radially inwardly from opposite ends of the cylindrical wall portion 30.
  • arcuate surface portions 22, 24, 32 and 34 are arcuate about a 1mm radius, as is the case with most conventional ball bearings suited for the present application.
  • the pulley structure 12 has a generally annular construction.
  • 20 structure 12 has a generally cylindrical peripheral wall portion 36 having a plurality of radially outwardly facing and circumferentially extending ribs 40 separated by a plurality of circumferentially extending grooves 42.
  • the alternating ribs 40 and grooves 42 form what is known as a poly-V configuration constructed and arranged to engage associated ribs and grooves of a poly-V timing or accessory drive belt.
  • the present invention is not limited to such
  • outer cylindrical wall portion 36 may have a smooth cylindrical outer surface constructed and arranged to engage the flat side of a timing or drive belt.
  • the pulley structure 12 further includes a radially extending wall portion 44 integrally formed with the cylindrical wall portion 36. The radially innermost portion of the wall portion
  • annular connecting portion 46 constructed and arranged to be connected with the radially outer periphery or outer race of the ball bearing assembly 10.
  • wall portion 44 may take the form of a complete annular ring, it may ' instead comprise a plurality of radially extending tab portions or spoke-like plates connecting the annular connecting portion 46 with the cylindrical wall portion 36.
  • the connecting portion 46 has a slightly greater thickness than the wall portion 44 and includes a radially innermost annular surface 48 of slightly greater diameter than the outer cylindrical surface portion 30 of the outer race 16.
  • annular surface 48 has somewhat of a convex configuration.
  • this convex configuration is provided by a substantially cylindrical surface portion 45, and annular edges 47 and 49 (also referred to as inner edge portions) which extend from opposite ends of the surface portion 45 at an obtuse angle of about 165 degrees with respect to the surface portion 45 as viewed in cross section.
  • the pulley structure 12 and ball bearing assembly 10 are shown mounted in a lower die part, generally indicated at 50. Together, the upper die part 60 and the lower die part 50 define a die assembly.
  • the lower die part 50 has a central interior pin 52 having an exterior diameter slightly smaller than the diameter of the inner cylindrical surface portion 20. The exterior configuration of pin 52 is constructed and arranged to form a close fit with the inner cylindrical surface portion 20 of the inner race 14.
  • the lower die part 50 also includes a vertically extending cylindrical interior wall 54 having a diameter slightly greater than the outer diameter of the pulley structure 12. The cylindrical wall 54 is thus constructed and arranged to be disposed in close fitting engagement with peripheral portions of the cylindrical wall 36 of the pulley structure 12.
  • the pin 52 and cylindrical wall 54 serve as locating elements for accurately positioning the pulley structure 12 relative to ball bearing assembly 10 in the lower die part 50 so as to maintain an annular gap or molten material receiving space 100 which provides relatively constant distance between the outer cylindrical wall portion 30 of the ball bearing assembly 10 and the inner annular surface 48 of the pulley structure 12.
  • this annular gap 100 is between .025 inches -.030 inches wide.
  • an upper metal die part 60 is lowered until it comes into forced engagement with the uppermost portion of the upwardly facing annular edge 47 (or 49 if inverted) of the pulley structure 12 and ball bearing assembly 10.
  • a pair of downwardly facing radially spaced annular sealing surface portions of the upper die part 60 form radially spaced annular seals with the uppermost annular portion of the connecting portion 46 (or the uppermost portion of the upwardly facing annular edge 47 of such connecting portion 46) and with the uppermost portion of the outer race's edge (or the uppermost portion of the upwardly facing arcuate surface portion 32 of such race's edge).
  • the aforementioned forced engagement forces the ball bearing assembly 10 into forced engagement with the lower die part 50 in similar fashion.
  • radially spaced, upwardly facing annular sealing surface portions of the lower die part 50 form radially spaced annular seals with the lowermost portion of connecting portion (or the lowermost portion of the downwardly facing annular edge 49 of such connecting portion) and with a lowermost downwardly facing annular portion of the outer race (or the lowermost annular portion of the downwardly facing arcuate surface portion 34 of such race).
  • the upper metal die part 60 has a plurality of circumferentially spaced pin holes 66 (also referred to as injecting holes) in the lower surface thereof between the downwardly facing radially spaced annular surface portions of the metal die part forming the respective annular seals with the uppermost annular portion of the connecting portion (or of the upper annular surface 47 of the connecting portion) and the uppermost annular portion of the outer race 16 (or uppermost annular portion of arcuate surface portion 32 thereof).
  • the pin holes 66 are positioned to inject an appropriate molten material into the sealed annular gap formed between the pulley structure 12 and ball bearing assembly 10.
  • the molten material used is a zinc/aluminum alloy, such as ZA3 or ZA5 alloy, or Accu-zinc. It is also possible to use substantially pure zinc, pure lead or glass-filled nylon.
  • the preferred molten zinc alloy beneficially has a low melting point and need only be heated to a temperature of between 825°-850° F.
  • a pulley made from phenolic material is used, although steel, aluminum, zinc, or plastic pulleys are also possible.
  • Phenolic is preferable because it is relatively inexpensive, and also because it absorbs heat at a relatively slow rate (i.e., in comparison with other possible materials), thus preventing the molten material from freezing or solidifying before it completely fills the sealed space or gap between the pulley structure 12 and ball bearing assembly 10. Additional advantages of a phenolic pulley are noted later.
  • the gap 100 is preferably about .025 inches and no smaller than .020 inches wide to prevent freezing of the molten substance prior to the gap being completely filled.
  • a smaller gap would accommodate a smaller amount of molten material, which would in turn having a corresponding smaller thermal mass.
  • the smaller the gap the greater the percentage of molten material will be in contact with the surrounding metal surfaces. Thus, smaller gaps cause faster solidification of the molten material.
  • the solidified material forms an annular locking wedge or element, generally indicated at 70, which has a cross sectional configuration that includes a cylindrical wall portion 72, and outwardly flared portions 74 and 76 or wedges at opposite ends thereof.
  • the ball-bearing assembly side of the cylindrical wall portion 72 forms a cylindrical inner surface portion 78 which has a substantially similar configuration to the adjacent exterior surface 30 of the outer race 16 as a result of the injection-molding process.
  • the pulley side of the wall portion 72 forms a cylindrical outer surface portion 80 which is substantially similar in configuration to the adjacent cylindrical surface portion 45 of the pulley structure 12 as a result of the injection-molding process.
  • the outwardly flared portions 74 and 76 of the annular locking wedge 70 are formed as a result of the convexly formed edges 47,49 of the connecting portion 46 of the pulley structure 12, and the convexly formed arcuate surface portions 32, 34 of the outer race 16.
  • the outwardly flared portion 74 includes a radially inwardly extending portion 75 and a radially outwardly extending portion 77.
  • the outwardly flared portion 76 includes a radially inwardly extending portion 79 and a radially outwardly extending portion 81.
  • inwardly extending portions 75, 79 have respective concave surfaces portions (axial movement limiting surfaces) 82, 84 extending from opposite ends of the cylindrical surface portion 78 on the ball bearing side of the locking wedge 70.
  • These arcuate surface portions 82, 84 have an arcuate configuration of an approximately 1 mm radius, matching the radius of the convex arcuate surface portions 32, 34 of the outer race 16.
  • the 5 radially outwardly extending portions 77 and 81 have respective angled surfaces (axial movement limiting surfaces) 86 and 88 which extend from opposite ends of cylindrical surface 80 at an angle with respect thereto. More particularly, the surface 80 has a generally straight cross-sectional configuration, and the opposite surface portions 86 and 88 extend at an angle of approximately 165° with respect to the straight surface 80.
  • the locking wedge or element 70 shrinks in a longitudinal or axial direction by a distance D when comparing its configuration when cast at 750°F to its configuration at an operating temperature of 175°F.
  • This longitudinal shrinkage causes the outwardly flared opposite longitudinal ends 74, 76 to apply a gripping force which mechanically grips the opposite edges of the outer race 16 and the opposite edges of the connecting portion
  • 25 wall portion 72 and adjacent surfaces of the pulley structure 12 and ball bearing assembly 10 is advantageous in that less stress is applied by the locking wedge 70 to the central, more vulnerable portions of the outer race 16 and connecting portion 46.
  • locking wedge 70 will permit rotational movement of the pulley structure 12 and the ball bearing assembly 10 relative to one
  • a plurality of grooves may be provided on either the innermost annular surface 48 of the pulley structure 12 or main cylindrical surface portion 30 of the ball bearing assembly 10, or both.
  • one or more groove engaging portions corresponding to the one or more grooves will be formed on the locking wedge or element 70 as it is cooled. These groove engaging portions engage the corresponding one or more grooves to prevent axial movement between the ball bearing assembly 10 and the pulley structure 12.
  • the annular surface 48 of the pulley structure 12 preferably has a convex configuration which forms a corresponding concave configuration on the adjacent portions of locking wedge 70.
  • surface portions 86, 80, and 88 of the locking wedge 70 together form a concave surface. It is preferred that the surface portions 86 and 88 form an obtuse angle of approximately 165° with respect to surface 80 and have a length of about 3 mm.
  • the inner convex surface of the pulley is formed by two annular surfaces which are angled with respect to one another and meet at a mutual boundary point.
  • annular locking wedge 90 will be formed having a concave surface 94 comprising a pair of angled surface portions 96 and 98 as shown.
  • the configuration shown in Figure 6 causes a more uniform load to be applied to the pulley after shrinking of the wedge.
  • Figure 7 is a variation of the embodiment shown in Figure 6.
  • Figure 7 shows an annular locking wedge 98 having an arcuate surface 104 adjacent the pulley which has a substantially smoothly formed concave configuration.
  • the surface 104 is constructed and arranged to be disposed in locking geometric relation with a correspondingly formed, smooth convex configuration of the inner annular surface of the associated pulley structure. In this configuration, the load on the pulley is greatest at the peripheral portions of the surface 104 and is zero at the center.
  • the surfaces 80, 94; and 104 of the respective embodiments of Figures 5, 6, and 7 each take a configuration which is substantially dictated by the particular configuration of the inner annular surface (e.g. annular surface 48 of the first embodiment) of the pulley structure 12.
  • the load on the pulley structure 12 can be modified in accordance with the particular configuration of the inner annular surface of the pulley structure 12.
  • the pulley structure 12 be molded from phenolic material, as mentioned above.
  • the phenolic material will be molded at 340 °C or higher and then cured at room temperature.
  • cross-link shrinkage occurs to tighten and strengthen the material.
  • the phenolic pulley structure 12 is brought down to approximately 200-220 °C after molding and is cured in an oven at this temperature for at least six hours to accomplish the aforementioned cross-link shrinkage. After curing the pulley structure 12, it is removed from the oven and placed in the lower die part 50 of the die assembly along with the ball bearing assembly 10 (which is at room temperature).
  • the molten material preferably zinc
  • the molten material is then injected into the gap.
  • the continued thermal shrinkage of the pulley structure 12 applies a further mechanical clamping force in addition to that applied by the zinc as it cools. Therefore, both the zinc and the pulley structure 12 shrink down on the ball bearing assembly 10 to lock it in place. Maintaining the pulley structure 12 at an elevated temperature and allowing it to shrink down on the locking wedge 70 and ball bearing assembly 10 also provides the further advantage that the pulley structure 12 will still exert sufficient pressure on the wedge 70 to maintain a locked relation even during operation under high temperature conditions.
  • the locking element 70 has a set of outwardly and inwardly extending flanges 110, 112 on each side which engage flange engaging surfaces 118, 120 formed on the faces of the pulley structure 12 and the ball bearing assembly 10.
  • These flanges 110, 112 are provided (1) to provide additional support against loosening of the pulley structure 12 and (2) to improve retention of the ball bearing assembly 10 in relation to the pulley structure 12.
  • These flanges 110, 112 may be arranged so that their exposed surfaces have maximum radiation capabilities so as to dissipate heat during high temperature conditions.
  • a plurality of fins 114 are provided on the pulley structure 12 to increase air flow when the assembly 10 is in use, thereby dissipating a build-up of heat via convection.
  • Fig. 8 it is preferred that the shape of the locking wedge 70 shown in Fig. 6 is used in the embodiment of Fig. 8.
  • the pulley assembly of the present invention has several advantages.
  • a relatively large gap between the pulley structure 12 and ball bearing assembly 10 can be used in comparison with a conventional arrangement where glue is used to adhere to the parts. Where glue or adhesive is used, a thinner or non-existent gap between parts must be used in order to obtain a sufficiently strong adhesive bond.
  • a phenolic pulley may be molded, and while it is still in an expanded condition (before shrinkage) a ball bearing assembly may be inserted in the central aperture of the pulley. Prior to shrinkage of the phenolic pulley, glue is inserted in the gap between the pulley and ball bearing assembly to make certain that the pulley is adequately secured to the ball bearing assembly.
  • a relatively larger gap can be used in accordance with the present invention, there is less concern with the particular tolerances or dimensions of parts, as any gap between the ball bearing assembly and pulley structure will be completely filled. Because there are less stringent dimension requirements, a relatively inexpensive pulley can be made of a molded phenolic material.
  • the solidified molten locking wedge provides a stronger mechanical bond in comparison with the conventional adhesive bond provided by glue. This is accomplished with a zinc/aluminum alloy, which is inexpensive, and which needs not undergo a curing process as with glue. Because curing is not required, manufacturing can be expedited, and the faults and difficulties associated with curing do not occur.
  • the preferred zinc/aluminum alloy has a relatively low specific heat, it cools and solidifies almost instantly after being injected in the gap between the ball bearing assembly 10 and pulley structure 12.
  • the instant cooling permits instant manual handling and also prevents heat degradation of the pulley assembly parts.
  • the present invention further contemplates that a pulley structure, similar to pulley structure 12, can be mounted directly on a shaft without the use of ball bearings.
  • a molten material such as those described above, can be injected between the shaft and pulley to provide a form-locking mechanical connection in a fashion similar to that noted above.
  • a ball bearing assembly may also be secured to the same shaft (or any shaft) in similar fashion to enable the shaft to be mounted for rotation.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Manufacturing & Machinery (AREA)
  • Pulleys (AREA)
  • Mounting Of Bearings Or Others (AREA)

Abstract

Un procédé permettant de fabriquer un ensemble poulie comprend les étapes suivantes: on fabrique un composant externe (12) présentant un orifice central avec une surface interne, et un composant interne (10) comportant une paroi externe. On dispose le composant interne dans l'orifice central. Les composants interne et externe définissent entre eux un espace destiné à recevoir un matériau fondu. Puis on injecte le matériau fondu dans ledit espace. On laisse le matériau fondu se solidifier et former un élément de verrouillage (70) comportant des parties à extension radiale, qui permettent le déplacement axial des composants interne et externe l'un par rapport à l'autre.
PCT/CA1998/000063 1997-02-03 1998-02-03 Ensemble poulie avec connexion moulee WO1998034053A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CA002279896A CA2279896C (fr) 1997-02-03 1998-02-03 Ensemble poulie avec connexion moulee
AU58501/98A AU5850198A (en) 1997-02-03 1998-02-03 Pulley assembley having molded connection

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US3727997P 1997-02-03 1997-02-03
US60/037,279 1997-02-03

Publications (1)

Publication Number Publication Date
WO1998034053A1 true WO1998034053A1 (fr) 1998-08-06

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CA1998/000063 WO1998034053A1 (fr) 1997-02-03 1998-02-03 Ensemble poulie avec connexion moulee

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AU (1) AU5850198A (fr)
CA (1) CA2279896C (fr)
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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6270001B1 (en) 1999-03-26 2001-08-07 Skf France Method of manufacturing a pulley with integral bearing
US6332718B1 (en) 1999-03-08 2001-12-25 Skf France Rolling bearing with seals and method for attaching seals to a bearing
DE102004021349A1 (de) * 2004-04-30 2005-12-01 Ab Skf Verfahren zur Herstellung einer Lageranordnung
DE102004021348A1 (de) * 2004-04-30 2005-12-01 Ab Skf Verfahren zum Befestigen eines Lagers
EP1840411A2 (fr) 2006-03-29 2007-10-03 JTEKT Corporation Ensemble de poulie et poulie utilisable correspondante
WO2010105644A1 (fr) * 2009-03-19 2010-09-23 Ab Skf Procédé de fabrication d'une bague de roulement
CN107687512A (zh) * 2016-08-05 2018-02-13 株式会社日立制作所 滑轮
US11204088B2 (en) * 2019-02-11 2021-12-21 Aktiebolaget Skf Pulley device, in particular for tensioning idler or runner roller

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US4111623A (en) * 1976-09-16 1978-09-05 Pemco-Kalamazoo, Inc. Apparatus for assembling bearing unit in a wheel
US4366609A (en) * 1979-09-17 1983-01-04 Dayco Corporation Composite pulley and method for making
US4535827A (en) * 1984-03-07 1985-08-20 Wil-Mat Corporation Molded shock-absorbing wheel assembly
JPH01229168A (ja) * 1988-03-08 1989-09-12 Koyo Seiko Co Ltd 軸受付き樹脂製回転体
US4913688A (en) * 1989-06-12 1990-04-03 Ford Motor Company Pulley assembly for accessory clutch having nonmetallic sheave
WO1996003288A1 (fr) * 1994-07-25 1996-02-08 Industriverktyg Ab Procede de montage d'un palier dans un moyeu de roue et roue fabriquee selon ce procede

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Publication number Priority date Publication date Assignee Title
US4111623A (en) * 1976-09-16 1978-09-05 Pemco-Kalamazoo, Inc. Apparatus for assembling bearing unit in a wheel
US4366609A (en) * 1979-09-17 1983-01-04 Dayco Corporation Composite pulley and method for making
US4535827A (en) * 1984-03-07 1985-08-20 Wil-Mat Corporation Molded shock-absorbing wheel assembly
JPH01229168A (ja) * 1988-03-08 1989-09-12 Koyo Seiko Co Ltd 軸受付き樹脂製回転体
US4913688A (en) * 1989-06-12 1990-04-03 Ford Motor Company Pulley assembly for accessory clutch having nonmetallic sheave
WO1996003288A1 (fr) * 1994-07-25 1996-02-08 Industriverktyg Ab Procede de montage d'un palier dans un moyeu de roue et roue fabriquee selon ce procede

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6332718B1 (en) 1999-03-08 2001-12-25 Skf France Rolling bearing with seals and method for attaching seals to a bearing
US6270001B1 (en) 1999-03-26 2001-08-07 Skf France Method of manufacturing a pulley with integral bearing
DE102004021348B4 (de) * 2004-04-30 2009-06-18 Ab Skf Verfahren zum Befestigen eines Lagers
DE102004021348A1 (de) * 2004-04-30 2005-12-01 Ab Skf Verfahren zum Befestigen eines Lagers
DE102004021349A1 (de) * 2004-04-30 2005-12-01 Ab Skf Verfahren zur Herstellung einer Lageranordnung
DE102004021349B4 (de) * 2004-04-30 2009-11-05 Ab Skf Verfahren zur Herstellung einer Lageranordnung
EP1840411A2 (fr) 2006-03-29 2007-10-03 JTEKT Corporation Ensemble de poulie et poulie utilisable correspondante
EP1840411A3 (fr) * 2006-03-29 2009-05-27 JTEKT Corporation Ensemble de poulie et poulie utilisable correspondante
WO2010105644A1 (fr) * 2009-03-19 2010-09-23 Ab Skf Procédé de fabrication d'une bague de roulement
CN102356168A (zh) * 2009-03-19 2012-02-15 Skf公司 制造轴承环的方法
US9540705B2 (en) 2009-03-19 2017-01-10 Aktiebolaget Skf Method of manufacturing a bearing ring
CN107687512A (zh) * 2016-08-05 2018-02-13 株式会社日立制作所 滑轮
CN107687512B (zh) * 2016-08-05 2021-02-05 株式会社日立制作所 滑轮
US11204088B2 (en) * 2019-02-11 2021-12-21 Aktiebolaget Skf Pulley device, in particular for tensioning idler or runner roller

Also Published As

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AU5850198A (en) 1998-08-25
CA2279896C (fr) 2007-03-20
CA2279896A1 (fr) 1998-08-06

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