Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
  • B62D—MOTOR VEHICLES; TRAILERS
  • B62D7/00—Steering linkage; Stub axles or their mountings
  • B62D7/18—Steering knuckles; King pins
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
  • B60B27/00—Hubs
  • B60B27/001—Hubs with roller-bearings
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
  • B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
  • B60T1/02—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels
  • B60T1/06—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels
  • B60T1/065—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels employing disc
• • 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
  • F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
  • F16D2055/0004—Parts or details of disc brakes
  • F16D2055/0008—Brake supports
• • 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
  • F16D2065/1304—Structure
  • F16D2065/1328—Structure internal cavities, e.g. cooling channels
• • 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
• • 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
  • F16D2065/1392—Connection elements

Definitions

• the present invention relates to a wheel hub and disk brake device for a vehicle wheel, comprising a carrier with means supporting the brake yoke, an axel portion joined to the carrier, on which axel portion a wheel hub is rotatably mounted and a brake disk non-rotatably joined to the wheel hub.
• Brake disks for disk brakes have up to now been fixed to the hub in essentially two ways, namely either by being made in one piece with the hub or by being screwed securely to a circular flange on the hub.
• the former method is in principle limited to brakes in lighter vehicles while the latter method is used in vehicles of intermediate weight as well, e.g. trucks up to about 16 tons.
• drum brakes In the heaviest truck class, drum brakes have been used almost exclusively in part because the very high maximum brake torques about (20,000 Nm) in combination with the application of the braking force by the brake pads creates problems.
• the extreme heating of the brake disk to the extreme braking force causes the disk, due to its rigid connection to the hub, to have a tendancy to ware or tilt and this affects its orientation relative to the brake yoke and secondly the force on the disk results in deformation of the steering knuckle, which also affects the orientation of the brake disk relative to the brake yoke. Both of these factors contribute to stresses on the disk and uneven wear on the disk and pads.
• the purpose of the present invention is to provide a wheel hub and disk brake device where the brake disk is fixed to the hub in such a way that tilting due to heat ⁇ ing and misalignment relative to the brake yoke when
• whe.el hub has a portion with an external, non-circular cross-sectional profile and that the brake disk carried by the wheel hub at the portion has a central aperture with a form adapted to said non- circular cross-section for non-rotating locking of the brake disk unto the hub.
• Such shape locking of the brake disk permits, on the one hand, the disk to expand radially without tilting or "warping" and, on the other hand, to adapt its alignment to the brake yoke upon deformation of the knuckle with accompanying misalignment of the brake yoke.
• the arrangement according to the invention makes it possible to use disk brakes in the heaviest class of vehicles.
• Form locking according to the invention can, however, due to the braking force and the shape of the non- circular cross-section, result in subjecting the disk hub to extreme bursting forces. There must therefore be sufficient material mass in the disk hub to absorb the bursting forces arising.
• Normally wheel hubs of the type in question are mounted on their axel shafts in distal and proximal bearings which are arranged between the axel shaft and the inner surface of the hub. The outer diameter of the proximal bearing determines the smallest inner diameter of the hub and thus the inner diameter of the disk hub as well.
• the proximal bearing is disposed between an external bearing support surface on the hub and an internal bearing support surface on an angular flange
• Fig. 1 shows a schematic prospective view of one embodiment of a steering knuckle arrangement according to the invention
• Fig. 2 shows a longitudinal section through a steering knuckle arrangement corresponding to that in Fig. 1
• Figs. 3a-e show different cross-sectional shapes of a part of the hub portion and a central aperture in a brake disk.
• Figs. 1 and 2 designates a distal end of a fixed front axel of a truck.
• the end of the axel has a conical bore 2 in which a king pin 3 is fixed.
• the king pin 3 has at its upper lower ends bearings 4 and 5 which are housed in upper and lower bores 6 and 7 respectively in a steering knuckle with a general designation 8, the steering knuckle shown comprises a knuckle unit 9 and an axel shaft unit 10, on which a wheel hub 11 is mounted in distal and proximal bearings 12 and 13 respectively.
• the hub supports a brake disk 14 and the knuckle unit 9 supports a brake yoke 15 which straddles the disk.
• the knuckle unit 9 and the axel shaft unit 10 are two separate components which are screwed together with screws 16.
• the knuckle unit 9 is preferably cast, while the axial shaft is forged to
• SUBSTITUTESHEET provide the required strength characteristics of the two units with optimum manufacturing methods.
• the hub 11 is mounted on the axel shaft unit 10 in a distal bearing 12 comprising two taper roller bearings and in an proximal bearing 13 consisting of a cylindrical roller bearing.
• This bearing 13 is disposed between an exterior bearing surface 17 on the hub 11 and an interior bearing surface 18 which is machined in a flange 19 cover which is cast in one piece with the knuckle unit 9.
• it is possible to dimension the hub 11 with a smaller external diameter . in this type of mounting than in the conventional type described by way of introduction.
• the disk in the embodiment according to the invention is joined to the hub by form locking.
• the hub has a central portion "a" which has a non-circular cross-section.
• Figs. 3a-e show a number of possible cross-sectional shapes for the portion "a", which can be characterized as polygons with "rounded corners”.
• the brake disk 14, which consists of a disk portion 20 with friction surfaces and an inner hub portion 21, which has a central aperture 22 with the same shape as the cross-section of the portion "a” and is adapted thereto so that there is a slide fit between the disk hub and the wheel hub.
• the movement of the disk 14 axially is limited on one side by an abutment surface 23 and on the other side by a lock ring 24 in a groove 25.
• the bearing arrangement shown in Fig. 2 permits, with such a form lock of the disk, a greater amount of material in the radial dimension of the wheel hub and the disk and thus greater strength in the connection
• Figs. 3a-c show embodiments of the polygon cross-section with a relatively large difference between the maximum and minimum radii. The shapes thereof are such that there is no risk for freezing or jamming but they presuppose the proximal bearing arrangement shown in Fig. 2.
• Figs. 3d-e show polygon shapes with a smaller radius difference, which could be used in a conventional proximal bearing of the wheel hub, but with greater risk for jamming under exceptional braking torque and heating.
• the disk 14 is mounted without any axial play, in an embodiment not shown in more detail here, the disk can be disposed with a certain amount of play between it and the abutment surface 23 and/or the lock ring 24.
• a thrust spring By mounting a thrust spring in the gap, there is provided greater freedom for axial adjustment at the same time as the risk of knocking is eliminated.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Transportation (AREA)
• General Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Braking Arrangements (AREA)
• Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Related Child Applications (1)

Publications (1)

Family

ID=20381211

Family Applications (2)

Family Applications After (1)

Country Status (6)

Families Citing this family (7)

Family Cites Families (11)

• 1990
  • 1990-12-17 SE SE9004021A patent/SE468135B/sv not_active IP Right Cessation
• 1991
  • 1991-12-13 WO PCT/SE1991/000861 patent/WO1992011474A1/en not_active Application Discontinuation
  • 1991-12-13 JP JP4501487A patent/JPH06503407A/ja not_active Ceased
  • 1991-12-13 EP EP19920901404 patent/EP0561950A1/de not_active Withdrawn
  • 1991-12-13 EP EP94118161A patent/EP0645298B1/de not_active Expired - Lifetime
  • 1991-12-13 ES ES94118161T patent/ES2119050T3/es not_active Expired - Lifetime
  • 1991-12-13 DE DE1991629597 patent/DE69129597T2/de not_active Expired - Fee Related

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events