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
  • F16D65/00—Parts or details
  • F16D65/02—Braking members; Mounting thereof
  • F16D65/12—Discs; Drums for disc brakes
  • F16D65/123—Discs; Drums for disc brakes comprising an annular disc secured to a hub member; Discs characterised by means for mounting
• • 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
  • F16D65/00—Parts or details
  • F16D65/02—Braking members; Mounting thereof
  • F16D2065/13—Parts or details of discs or drums
  • F16D2065/134—Connection
  • F16D2065/1356—Connection interlocking
  • F16D2065/1368—Connection interlocking with relative movement both radially and axially
• • 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
  • F16D65/00—Parts or details
  • F16D65/02—Braking members; Mounting thereof
  • F16D2065/13—Parts or details of discs or drums
  • F16D2065/134—Connection
  • F16D2065/1384—Connection to wheel 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
  • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
  • F16D65/00—Parts or details
  • F16D65/02—Braking members; Mounting thereof
  • F16D2065/13—Parts or details of discs or drums
  • F16D2065/134—Connection
  • F16D2065/1392—Connection elements

Definitions

• the present invention relates to a wheel hub and brake disc devj.ee for a vehicle wheel, comprising a hub portion mounted via bearing means on an axle end, said hub portion having a cylindrical neck portion with alternating axial grooves and bars, a brake disc having a central opening with corresponding grooves and bars, engaging the bars and grooves in the neck portion to fix rotationally the brake disc on the hub portion, and an open retainer ring, held in a peripheral groove in the neck portion for axially fixing the brake disc in one direction on the hub portion.
• SE-A-9201710-2 and SE-A-9602385-8 describe as known, wheel hub and brake disc devices, in which the neck portion of the hub is provided with external splines engaging internal splines in a central opening in the brake disc.
• the brake disc is fixed axially between outer and inner retainer rings disposed in grooves in the neck portion of the hub.
• the inner retainer ring fixes a resilient ring, which is in contact with the hub and the disc and permits limited axial movement between the disc and the hub, to compensate for tolerances and deformation occurring in the components when braking.
• the outer retainer ring is disposed in direct contact with a side surface of the brake disc and forms a rigid end abutment, which limits the outward axial movement of the disc.
• retainer rings are used either with rectangular cross section (SE-A-9201710-2) or circular cross section (SE-A-9602385-8). Both are open rings with end portions, having end surfaces facing each other, and both have both advantages and disadvantages.
• the surface pressure of the rectangular ring against the brake disc is lower than that of the ring with circular cross section, but it can, on the other hand, under certain conditions, expand when there is relative movement between the hub and the disc, due to a sort of climbing effect between the retainer ring and the disc. This effect is avoided with a ring of circular cross section, but the surface pressure increases on the other hand. None of the retainer rings has fixation rings for preventing rotation relative to the hub and the disc, and this means that the increased surface pressure with the circular cross section results in increased wear.
• the purpose of the present invention is in general to achieve a wheel hub and brake disc device of the type described by way of introduction, which has a retainer ring arrangement, which provides lower wear than the known solution described above with a retainer ring with circular cross section, at the same time as one eliminates the climbing effect with the risk that the ring will jump out of its position.
• the retainer ring has end portions facing each other, of which at least one is bent radially inwards and extends into a recess in the neck portion to fix rotationally the retainer ring on the neck portion.
• a ring rotationally fixed in this manner eliminates wear caused by friction due to movement, and this means that despite the higher surface pressure, it is possible to use a ring of circular cross section and which does not have the tendency to climb of the ring having rectangular cross section.
• the brake disc has a peripheral groove in conjunction with its central opening, said peripheral groove having a profile adapted to the cross-sectional profile of the retainer ring, with a peripheral surface, which projects over and is disposed slightly spaced from the radially outer surface of the retainer ring to prevent the retainer ring from expanding radially.
• Figure 1 shows a longitudinal section through one embodiment of a wheel hub and brake disc device according to the invention
• Figure 2 is a side view of the outer retainer ring of the device
• Figure 3 is an enlargement of the circled area in Figure 1.
• the wheel hub and brake disc device in Fig. 1 comprises an axle end 1, supporting a so-called unit bearing generally designated 2, the outer ring 3 of which is provided with an annular flange 4 forming a portion of the wheel hub.
• a disc-shaped supporting element 6 To the flange 4 there is screwed fast a disc-shaped supporting element 6, a so-called wheel disc, which has a neck portion 7 integral therewith, the outer lateral surface of which is made with al- ternating V-shaped axial spline grooves and bars 8,9.
• a brake disc 10 has a central opening with corresponding axial grooves and bars 11,12 engaging the bars and grooves 9,8 of the neck portion 7 to rotationally fix the brake disc.
• the disc 10 is axially loaded against an outer retainer ring 14 disposed in a periph- eral groove 13 in the bars 9 of the hub neck 7 by a spring ring 15 which is locked against an inner end surface of the disc 10 and the hub neck 7 by an inner retainer ring 16.
• the depth of the groove 13 is approximately one half of the height of the axial grooves and bars 8,9.
• the retainer ring 14 is broken, so that it can expand for mounting.
• One end portion 17 thereof is bent down towards the centre of the retainer ring and forms a lock pin, the length of which from the radial inner surface of the ring being approximately equal to the diameter of the basic circle c providing the cross sectional profile of the ring, as can be seen in more detail in Fig. 2 and in the enlarged section in Fig. 3.
• the pin 17 extends down into an axial groove 8 between two bars 9 and thereby prevents the retainer ring from rotating relative to the hub portion 7 and the brake disc 10.
• the retainer ring 14 in the example shown has an essentially circular cross sectional profile with opposite planar lateral surfaces 18, one of which forms an abutment surface to a flat lateral surface 19 of a circular groove 20 disposed near the central opening of the brake disc.
• the depth of the groove 20 is approximately equal to the radius of the basic circle c of the cross sectional profile of the ring 16.
• the flat lateral surface 19 of the groove 20 is connected to a curved wall portion 21, the radius of curvature of which is approximately equal to the radius of curvature of the basic circle c.
• the retainer ring 14 has two opposing planar surfaces 18 but for its function, it would be enough that the surface 19 facing the disc 10 is flat.
• the ring could be entirely circular, square or rectangular in cross section. For the latter two cross-sectional profiles, it is advantageous to avoid sharp corners between the sides.
• the cross-sectional profile shown in the drawings with a circular basic shape and flattened opposing lateral surfaces has, however, proved to be optimal with regard to function and manufacture.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Braking Arrangements (AREA)

Priority Applications (5)

Applications Claiming Priority (2)

Publications (1)

Family

ID=20412169

Family Applications (1)

Country Status (7)

Cited By (6)

Families Citing this family (8)

Citations (4)

Family Cites Families (3)

• 1998
  • 1998-07-28 SE SE9802634A patent/SE513019C2/sv unknown
• 1999
  • 1999-07-28 EP EP99943546A patent/EP1101041B1/en not_active Expired - Lifetime
  • 1999-07-28 BR BR9912439-4A patent/BR9912439A/pt not_active IP Right Cessation
  • 1999-07-28 US US09/744,745 patent/US6330937B1/en not_active Expired - Fee Related
  • 1999-07-28 WO PCT/SE1999/001323 patent/WO2000006922A1/en active IP Right Grant
  • 1999-07-28 DE DE69922380T patent/DE69922380T2/de not_active Expired - Fee Related
  • 1999-07-28 JP JP2000562677A patent/JP2002521634A/ja active Pending

Patent Citations (4)

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