US20120047740A1 - Manufacturing method for vehicle hub unit - Google Patents

Manufacturing method for vehicle hub unit Download PDF

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Publication number
US20120047740A1
US20120047740A1 US13/204,948 US201113204948A US2012047740A1 US 20120047740 A1 US20120047740 A1 US 20120047740A1 US 201113204948 A US201113204948 A US 201113204948A US 2012047740 A1 US2012047740 A1 US 2012047740A1
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United States
Prior art keywords
end portion
hub
spindle
clinching
manufacturing
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.)
Abandoned
Application number
US13/204,948
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English (en)
Inventor
Kentaro Shirakami
Hiroyuki Oumi
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.)
JTEKT Corp
Original Assignee
JTEKT Corp
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Filing date
Publication date
Application filed by JTEKT Corp filed Critical JTEKT Corp
Assigned to JTEKT CORPORATION reassignment JTEKT CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: OUMI, HIROYUKI, SHIRAKAMI, KENTARO
Publication of US20120047740A1 publication Critical patent/US20120047740A1/en
Abandoned legal-status Critical Current

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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
    • 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
    • F16D1/076—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 by clamping together two faces perpendicular to the axis of rotation, e.g. with bolted flanges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J9/00—Forging presses
    • B21J9/02—Special design or construction
    • B21J9/025—Special design or construction with rolling or wobbling dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K25/00—Uniting components to form integral members, e.g. turbine wheels and shafts, caulks with inserts, with or without shaping of the components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • B60B27/0005—Hubs with ball bearings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • B60B27/0015—Hubs for driven wheels
    • B60B27/0036—Hubs for driven wheels comprising homokinetic joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • B60B27/0094—Hubs one or more of the bearing races are formed by the hub
    • 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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/58—Raceways; Race rings
    • F16C33/581—Raceways; Race rings integral with other parts, e.g. with housings or machine elements such as shafts or gear wheels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B2310/00—Manufacturing methods
    • B60B2310/30—Manufacturing methods joining
    • B60B2310/3142—Manufacturing methods joining by caulking
    • 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
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
    • F16C19/181—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
    • F16C19/183—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles
    • F16C19/184—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement
    • F16C19/186—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement with three raceways provided integrally on parts other than race rings, e.g. third generation hubs
    • 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
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/02—Wheel hubs or castors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49481—Wheel making
    • Y10T29/49492—Land wheel
    • Y10T29/49533—Hub making

Definitions

  • the invention relates to a manufacturing method for a vehicle hub unit in which a member that constitutes an inner ring is fixed by clinching to an end portion of a hub spindle of a hub wheel to which a wheel is fitted.
  • a hub unit is used to support a wheel of an automobile such that the wheel is rotatable with respect to a suspension.
  • FIG. 7 is a sectional view that illustrates an example of an existing hub unit.
  • a hub unit 51 shown in FIG. 7 includes a hub wheel 53 , an inner ring member 54 , an outer ring 55 , and a plurality of rolling elements 56 .
  • the hub wheel 53 has a hub spindle 52 .
  • the inner ring member 54 is fixed to one end of the hub spindle 52 by clinching.
  • the outer ring 55 is arranged radially outward of the hub spindle 52 .
  • the rolling elements 56 are rollably arranged between one of outer ring raceways 55 a of the inner peripheral surface of the outer ring 55 , and an inner ring raceway 52 a of the outer peripheral surface of the hub spindle 52 or an inner ring raceway 54 a of the outer peripheral surface of the inner ring member 54 .
  • a flange portion 57 is formed at the end portion (left end portion in FIG. 7 ) of the hub wheel 53 , and a wheel of a tire, a brake disc, and the like (not shown), are fitted to the flange portion 57 .
  • a fixing flange 58 is formed on the outer peripheral surface of the outer ring 55 . The fixing flange 58 is used to fit the hub unit 51 to a vehicle body-side member (not shown) supported by a suspension of a vehicle.
  • Rotational driving force of a drive shaft 60 is transmitted to the hub unit 51 via a constant velocity joint 59 .
  • a spline tooth portion (side face spline) 62 is formed at a clinched portion 61 of the hub spindle end portion for fixing the inner ring member 54 , and then the spline tooth portion 62 is meshed with a tooth portion (side face spline) 64 formed at an end surface of the outer ring 63 of the constant velocity joint 59 (see, for example, Published Japanese Translation of PCT Application No. 2008-536737 and Japanese Patent Application Publication No. 2008-174178).
  • rotational driving force is transmitted to the hub unit via a constant velocity joint due to the mesh of the teeth that extend in a direction substantially perpendicular to a rotary shaft.
  • FIG. 10 is an enlarged view of a main portion in FIG. 9 .
  • an end surface of the existing punch 142 has a conical shape of which the center just slightly protrudes. Therefore, the material of the hub spindle end portion may be deformed toward the radial center of the hub spindle 52 as the oscillating clinching proceeds. If plastic deformation toward the radial center of the hub spindle 52 becomes significant, a portion 61 a formed due to deformation toward the radial center of the hub spindle 52 may contact the constant velocity joint when the constant velocity joint is fitted to the hub unit.
  • An aspect of the invention relates to a manufacturing method for a vehicle hub unit in which a hub wheel is arranged radially inward of an outer ring via rolling elements, an inner ring member is fixed to an end portion of a hub spindle of the hub wheel by clinching, a spline tooth portion that meshes with a tooth portion of a constant velocity joint that transmits driving force to the hub unit is formed at a clinched portion of the hub spindle, and a protruding portion is formed at a radially inner side portion of a bottom of the spline tooth portion.
  • the clinched portion is formed by plastically deforming a cylindrical end portion of the hub spindle outward with a clinching tool.
  • the clinching tool includes a punch that is configured to be inserted into the cylindrical end portion and that has a guide portion that is configured to contact the cylindrical end portion with a predetermined inclination angle with respect to an inner peripheral surface of the end portion, and an oscillating spindle to which the punch is non-rotatably attached.
  • the guide portion is formed in a projecting shape so as to project from a center portion of one end surface of the punch.
  • a tooth profile for plastically machining the spline tooth portion is formed at the one end surface of the punch, at a portion radially outward of a base of the guide portion.
  • the guide portion of the punch is inserted into the end portion of the hub spindle, the punch is pressed against the end portion of the hub spindle with predetermined pressing force, and a spindle that is coaxial with the hub spindle is rotated to oscillate the clinching tool, so that the clinched portion and the spline tooth portion are formed at the same time through plastic deformation while plastic deformation of the end portion of the hub spindle toward a radial center of the hub spindle is suppressed by the guide portion.
  • FIG. 1 is a sectional view that illustrates an example of a vehicle hub unit manufactured by a manufacturing method according to an embodiment of the invention
  • FIG. 2 is an enlarged view that illustrates an end portion of a clinched portion of the vehicle hub unit shown in FIG. 1 ;
  • FIG. 3 is a sectional view for explaining the manufacturing method according to the embodiment of the invention.
  • FIG. 4 is an enlarged view of a main portion in FIG. 3 ;
  • FIG. 5A and FIG. 5B are views that illustrate an example of a punch of a clinching tool
  • FIG. 6 is a view for explaining a method of applying lubricant to an end portion of a hub spindle
  • FIG. 7 is a sectional view that illustrates an existing vehicle hub unit
  • FIG. 8 is an enlarged view that illustrates an end portion of a clinched portion of the vehicle hub unit shown in FIG. 7 ;
  • FIG. 9 is a sectional view for explaining an existing manufacturing method.
  • FIG. 10 is an enlarged view of a main portion in FIG. 9 .
  • FIG. 1 is a sectional view that illustrates an example of the vehicle hub unit 1 manufactured by the manufacturing method according to the embodiment of the invention.
  • FIG. 2 is an enlarged view that illustrates an end portion of a clinched portion of the vehicle hub unit.
  • the vehicle hub unit 1 supports a wheel of an automobile such that the wheel is rotatable with respect to a suspension.
  • the vehicle hub unit 1 includes a hub wheel 3 , an outer ring 5 and a plurality of rolling elements 6 .
  • the hub wheel 3 has a cylindrical hub spindle 2 .
  • An inner ring member 4 is fixed to one end (right end portion in FIG. 1 ) of the hub spindle 2 by clinching.
  • the outer ring 5 is arranged radially outward of the hub spindle 2 .
  • the rolling elements 6 each are rollably arranged between an outer ring raceway 5 a of the inner peripheral surface of the outer ring 5 and an inner ring raceway 2 a of the outer peripheral surface of the hub spindle 2 or between an outer ring raceway 5 b of the inner peripheral surface of the outer ring 5 and an inner ring raceway 4 a of the outer peripheral surface of the inner ring member 4 .
  • the rolling elements 6 are retained by a cage 20 , and arranged at predetermined intervals in the circumferential direction.
  • Seal members 21 are provided in an annular space formed between the outer ring 5 and the hub wheel 3 . The seal members 21 close the annular space from both ends of the annular space in the axial direction.
  • a flange portion 7 is formed at the end portion (left end portion in FIG. 1 ) of the hub wheel 3 .
  • a wheel of a tire, a brake disc, and the like (not shown), are fitted to the flange portion 7 with bolts.
  • a reference numeral 7 a denotes a hole into which a bolt is inserted.
  • a fixing flange 8 is formed on the outer peripheral surface of the outer ring 5 . The fixing flange 8 is used to fit the hub unit 1 to a vehicle body-side member (not shown) supported by the suspension of a vehicle.
  • the hub spindle 2 is a single-piece member that has a large-diameter portion 9 and a small-diameter portion 11 .
  • the large-diameter portion 9 is formed at a position near the flange portion 7 .
  • the small-diameter portion 11 is smaller in diameter than the large-diameter portion 9 , and is formed so as to be contiguous with the large-diameter portion 9 via a step 10 .
  • the inner ring raceway 2 a is formed in the outer peripheral surface of the large-diameter portion 9 .
  • the inner ring raceway 2 a corresponds to the outer ring raceway 5 a of the outer ring 5 .
  • the inner ring member 4 is fitted onto the outer peripheral surface of the small-diameter portion 11 of the hub spindle 2 , and then an end portion of the small-diameter portion 11 is clinched to form a clinched portion 12 , as will be described later. In this way, the inner ring member 4 is fixed between the step 10 and the clinched portion 12 .
  • the constant velocity joint 30 shown in the drawing is a Birfield constant velocity joint.
  • the constant velocity joint 30 includes an inner ring 32 , a plurality of balls 34 and a cage 35 .
  • the inner ring 32 is joined to one end of the drive shaft 31 .
  • the balls 34 are arranged between the inner ring 32 and an outer ring 33 that is arranged radially outward of the inner ring 32 .
  • the cage 35 retains the balls 34 .
  • the outer ring 33 of the constant velocity joint 30 has a bowl-shaped outer ring cylindrical portion 33 a and an outer ring shaft portion 33 b .
  • the outer ring shaft portion 33 b extends from a center portion of an end surface of the outer ring cylindrical portion 33 a .
  • the outer ring shaft portion 33 b has a hole 36 that extends in the axial direction.
  • the inner peripheral surface of the outer ring shaft portion 33 b which defines the hole 36 , has an internal thread.
  • the hub unit 1 is connected to the constant velocity joint 30 by a cap bolt 38 that has an external thread 37 at its end portion.
  • a spline tooth portion 13 is formed at the end surface of the clinched portion 12 of the end portion of the hub spindle 2 .
  • a tooth portion 14 is formed at the end surface of the outer ring cylindrical portion 33 a , which faces the clinched portion 12 . Owing to the mesh of the spline tooth portion 13 and the tooth portion 14 , rotational driving force of the drive shaft 31 is transmitted to the hub unit 1 via the constant velocity joint 30 .
  • the number of teeth 13 a of the spline tooth portion 13 is 37 , a protruding portion 15 is formed at each bottom 13 b between the consecutive teeth 13 a .
  • Each protruding portion 15 protrudes toward the tooth portion 14 of the outer ring cylindrical portion 33 a that faces the spline tooth portion 13 .
  • Each protruding portion 15 is formed at a radially inner portion of the bottom 13 b of the spline tooth portion 13 . More specifically, each protruding portion 15 is formed at the bottom 13 b at a portion substantially radially inward of a meshing portion 16 (hatched portion in FIG.
  • a predetermined clearance C 1 is left between each bottom 13 b of the spline tooth portion 13 , including the surface of the protruding portion 15 , and a top surface 14 c of the tooth 14 a of the tooth portion 14 of the outer ring cylindrical portion 33 a , which faces the bottom 13 b .
  • a predetermined clearance C 2 is left between a top surface 13 c of each tooth 13 a of the spline tooth portion 13 and a bottom 14 b of the tooth portion 14 of the outer ring cylindrical portion 33 a , which faces the top surface 13 c.
  • Both the spline tooth portion 13 and the tooth portion 14 of the outer ring cylindrical portion 33 a are formed by closed die forging.
  • the predetermined clearances C 1 and C 2 are set such that tolerances in closed die forging are absorbed so as not to cause contact between the teeth when the constant velocity joint 30 is fitted to the hub unit 1 .
  • the clearances C 1 and C 2 vary depending on the accuracy of closed die forging, the clearances C 1 and C 2 are usually approximately 0.5 to 1 mm.
  • the above-described spline tooth portion 13 is formed together with the clinched portion 12 at the same time by fitting the inner ring member 4 onto the outer peripheral surface of the small-diameter portion 11 of the hub spindle 2 and then subjecting the end portion of the small-diameter portion 11 to closed die forging.
  • FIG. 5A and FIG. 5B show an example of such a clinching tool 40 .
  • the clinching tool 40 includes a punch 42 and an oscillating spindle 43 to which the punch 42 is non-rotatably attached.
  • the punch 42 has a guide portion 41 that is configured to be inserted into the end portion of the small-diameter portion 11 and that is configured to be brought into contact with the end portion with a predetermined inclination angle with respect to the inner peripheral surface of the end portion.
  • the hub wheel 3 is placed on a base 46 , from which multiple knock-pins 45 extend, such that the outer-side (side close to the outer side of the vehicle when the hub unit 1 is attached to the vehicle) side surface of the flange portion 7 is in contact with the base 46 . Then, the knock-pins 45 are inserted into the holes 7 a of the flange portion 7 to fix the hub wheel 3 to the base 46 .
  • the guide portion 41 of the punch 42 has a projecting shape that projects from the center portion of one end surface of the punch 42 .
  • a tooth profile 42 a is formed in the one end surface of the punch 42 , at a portion radially outward of the base of the guide portion 41 .
  • the tooth profile 42 a is used to plastically form the spline tooth portion 13 .
  • a recess 44 having a shape corresponding to each protruding portion 15 of the spline tooth portion 13 is formed at a radially inner side portion of each protruding portion 42 b of the punch 42 , which corresponds to the bottom of the spline tooth portion 13 .
  • the recesses 44 are used to form the protruding portions 15 of the spline tooth portion 13 .
  • the clinching tool 40 is inserted into the small-diameter portion 11 of the hub spindle 2 of the hub wheel 3 . Subsequently, the punch 42 of the clinching tool 40 is pressed against the end portion of the small-diameter portion 11 with predetermined pressing force, and a spindle (not shown) that is coaxial with the hub spindle 2 is rotated to oscillate the clinching tool 40 .
  • the small-diameter portion 11 is plastically deformed radially outward and the clinched portion 12 is formed, and, at the same time, the spline tooth portion 13 is formed at the end surface of the clinched portion 12 by the tooth profile of the punch 42 .
  • the punch 42 has the guide portion 41 .
  • the guide portion 41 is configured to contact the end portion of the small-diameter portion 11 with a predetermined angle with respect to the inner peripheral surface of the small-diameter portion 11 of the hub spindle 2 . Therefore, plastic deformation of the small-diameter portion 11 toward the radial center of the sub spindle 2 during oscillating clinching is suppressed. Accordingly, the predetermined protruding portions 15 are accurately formed at a radially inner side portion of the spline tooth portion 13 . Thus, it is possible to avoid contact between the hub wheel 3 and the constant velocity joint 30 when the constant velocity joint 30 is fitted to the hub unit 1 .
  • annular restraining member 70 is arranged radially outward of the inner ring member 4 .
  • the restraining member 70 is used to prevent the inner ring member 4 from deforming radially outward due to pressure applied from the punch 42 during oscillating clinching.
  • the restraining member 70 has an annular body 71 , an annular protruding portion 72 and a guide 73 .
  • the annular protruding portion 72 axially protrudes from the inner peripheral portion of one end surface of the annular body 71 .
  • the guide 73 is formed on the inner peripheral surface of the annular body 71 .
  • the annular protruding portion 72 is inserted into an annular space between the outer peripheral surface of the inner ring member 4 fitted around the small-diameter portion 11 of the hub spindle 2 and the inner peripheral surface of the inner-side (side close to the inner side of the vehicle when the hub unit 1 is attached to the vehicle) end portion of the outer ring 5 . Then, the length of the inside diameter of the annular protruding portion 72 and annular body 71 is adjusted such that the inner peripheral surface of the annular protruding portion 72 contacts the outer peripheral surface of the inner ring member 4 fitted around the small-diameter portion 11 of the hub spindle 2 . In addition, when the restraining member 70 is arranged, the guide 73 contacts the inner-side end surface of the inner ring member 4 . Therefore, it is possible to easily determine the position of the restraining member 70 in the up-down direction (axial direction).
  • the radially outer side portion of the inner ring member 4 close to the inner ring raceway 4 a is restrained by the restraining member 70 . Therefore, deformation of the inner ring member 4 during clinching is suppressed, and it is possible to prevent occurrence of indentation in the inner ring raceway 4 a.
  • the protrusion height of the annular protruding portion 72 in the axial direction is adjusted to such a height that the inner peripheral surface of the annular protruding portion 72 contacts a portion of the outer peripheral surface of the inner ring member 4 , on which the seal member 21 will be arranged. If the protrusion height of the annular protruding portion 72 in the axial direction is adjusted in this way, even when an annular recess 4 d is formed in the inner-side end portion of the inner ring member 4 in order to fit an annular dust cover 80 (see FIG.
  • the restraining member 70 is arranged so as to cover a portion of the outer peripheral surface (the diameter of this portion of the outer peripheral surface is larger than the diameter of a portion at which the recess is formed) of the inner ring member 4 , the portion being further axially inward than the recess 4 d in the bearing. Therefore, it is possible to reliably suppress deformation of the inner ring member 4 during clinching.
  • the protrusion height of the annular protruding portion 72 in the axial direction is set to such a height that a distance of approximately 0.5 mm is ensured between the end surface of the annular protruding portion 72 and an inner ring shoulder portion 4 c that is the boundary between the inner ring raceway 4 a and outer peripheral surface 4 b of the inner ring member 4 .
  • a distance of approximately 0.5 mm is ensured between the end surface of the annular protruding portion 72 and an inner ring shoulder portion 4 c that is the boundary between the inner ring raceway 4 a and outer peripheral surface 4 b of the inner ring member 4 .
  • lubricant for example, lubricating oil
  • lubricating oil may be sprayed onto a lubrication portion, that is, the end portion of the small-diameter portion 11 of the hub spindle 2 .
  • lubricant is applied to the end portion of the small-diameter portion 11 of the hub spindle 2 with the use of an applicator 90 made of spongy porous material, instead of being sprayed.
  • an applicator 90 made of spongy porous material, instead of being sprayed.
  • the used amount of lubricant is minimized.
  • lubricant does not scatter to portions around a portion that needs lubrication, unlike the case where lubricant is applied by spraying. Therefore, the number of cleanup works for equipment is reduced.
  • the applicator 90 is formed of a first applicator 93 and a second applicator 94 .
  • the first applicator 93 is immersed in lubricating oil 92 stored in a container 91 .
  • the second applicator 94 contacts the first applicator 93 to absorb the lubricating oil.
  • the first applicator 93 is formed of a disc-shaped body 93 a and a cylindrical absorbing portion 93 b .
  • the body 93 a has a hole at its center.
  • the absorbing portion 93 b is inserted into the hole of the body 93 a .
  • the body 93 a of the first applicator 93 is arranged on the upper surface of a perforated partition panel 91 a of the container 91 .
  • the absorbing portion 93 b extends through the hole 91 b of the perforated partition panel 91 a , and is immersed in the lubricating oil 92 in the container 91 .
  • the lubricating oil 92 is absorbed by the absorbing portion 93 b and spreads all around the body 93 a .
  • the absorbing portion 93 b has a cylindrical shape, it is possible to ensure a large contact area at which the absorbing portion 93 b contacts the lubricating oil 92 in the container 91 , and the body 93 a efficiently absorbs the lubricating oil 92 .
  • the second applicator 94 When the second applicator 94 is brought into contact with the body 93 a , the second applicator 94 absorbs an appropriate amount of lubricating oil. When the second applicator 94 that has absorbed the appropriate amount of lubricating oil is brought into contact with the end portion of the small-diameter portion 11 of the hub spindle 2 in a stamping manner, an optimal amount of lubricating oil is uniformly applied to only forged portions.
  • the second applicator 94 is moved by forming the hole at the center of the second applicator 94 , inserting a columnar engaging portion (not shown) of a transferring mechanism into the hole, and moving the transferring mechanism by appropriate driving means.
  • stamping application method using the above-described applicator 90 made of spongy porous material is not limited to the case where a spline tooth portion is machined by oscillating clinching, and the application method may also be applied to another general oscillating clinching in which a spline tooth portion is not formed.
  • each protruding portion is a wavy shape.
  • another sectional shape such as a semi-circular shape and a trapezoidal shape, may be employed.
  • a first-generation or second-generation structure in which a pair of inner rings is press-fitted onto a hub spindle may be employed.
  • the peripheral surface (in the sectional view shown in FIG. 5A and FIG. 5B , the portion shown by the oblique line of a trapezoid) of the guide portion 41 of the punch 42 is a flat surface.
  • the peripheral surface may be formed in a curved surface.
  • the guide portion that projects from the center portion of one end surface of the punch suppresses plastic deformation of the hub spindle end portion toward radial center of the hub spindle during oscillating clinching. Therefore, it is possible to avoid contact between the hub wheel and the constant velocity joint when the constant velocity joint is fitted to the hub unit.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rolling Contact Bearings (AREA)
  • Mounting Of Bearings Or Others (AREA)
  • Forging (AREA)
US13/204,948 2010-08-30 2011-08-08 Manufacturing method for vehicle hub unit Abandoned US20120047740A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010-192413 2010-08-30
JP2010192413A JP2012045612A (ja) 2010-08-30 2010-08-30 車両用ハブユニットの製造方法

Publications (1)

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US20120047740A1 true US20120047740A1 (en) 2012-03-01

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Application Number Title Priority Date Filing Date
US13/204,948 Abandoned US20120047740A1 (en) 2010-08-30 2011-08-08 Manufacturing method for vehicle hub unit

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US (1) US20120047740A1 (enrdf_load_stackoverflow)
EP (1) EP2422995B1 (enrdf_load_stackoverflow)
JP (1) JP2012045612A (enrdf_load_stackoverflow)
CN (1) CN102381139A (enrdf_load_stackoverflow)

Cited By (4)

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