GB2104985A - Disc brakes - Google Patents

Disc brakes Download PDF

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Publication number
GB2104985A
GB2104985A GB08126424A GB8126424A GB2104985A GB 2104985 A GB2104985 A GB 2104985A GB 08126424 A GB08126424 A GB 08126424A GB 8126424 A GB8126424 A GB 8126424A GB 2104985 A GB2104985 A GB 2104985A
Authority
GB
United Kingdom
Prior art keywords
disc
wheel
brake
caliper
fastening means
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.)
Granted
Application number
GB08126424A
Other versions
GB2104985B (en
Inventor
Richard Arnold Bass
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.)
Automotive Products PLC
Original Assignee
Automotive Products PLC
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 Automotive Products PLC filed Critical Automotive Products PLC
Priority to GB08126424A priority Critical patent/GB2104985B/en
Priority to IN571/DEL/82A priority patent/IN159271B/en
Priority to DE8282304135T priority patent/DE3266841D1/en
Priority to EP82304135A priority patent/EP0074181B1/en
Priority to JP1982128685U priority patent/JPS5896137U/en
Publication of GB2104985A publication Critical patent/GB2104985A/en
Application granted granted Critical
Publication of GB2104985B publication Critical patent/GB2104985B/en
Priority to US06/825,697 priority patent/US4716993A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/02—Braking members; Mounting thereof
    • F16D65/04—Bands, shoes or pads; Pivots or supporting members therefor
    • F16D65/092—Bands, shoes or pads; Pivots or supporting members therefor for axially-engaging brakes, e.g. disc brakes
    • F16D65/095—Pivots or supporting members therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B21/00—Rims
    • B60B21/02—Rims characterised by transverse section
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62L—BRAKES SPECIALLY ADAPTED FOR CYCLES
    • B62L1/00—Brakes; Arrangements thereof
    • B62L1/005—Brakes; Arrangements thereof constructional features of brake elements, e.g. fastening of brake blocks in their holders
    • 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
    • F16D55/02—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
    • F16D55/22—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads
    • F16D55/228—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a separate actuating member for each side
    • 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
    • F16D2055/0075—Constructional features of axially engaged brakes
    • F16D2055/0091—Plural actuators arranged side by side on the same side of the rotor
    • 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
    • F16D2065/1372—Connection outer circumference
    • 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

Landscapes

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

Abstract

A (motor cycle) disc brake has a disc (15) secured by its outer peripheral margin to a rotatable member, as shown, a wheel (16) and a brake caliper (11) straddles the inner periphery of the disc. The disc (15) is secured to the rotatable member by fastening means e.g. bolts (17) which allow the disc (15) some axial play relative thereto. As shown, bolts (17) each pass through bush (18) of greater length than thickness of disc (15) to give the axial play and there is also clearance on radially inner edge of holes (19) in disc (15) to allow for thermal expansion of disc (15). <IMAGE>

Description

SPECIFICATION Disc brakes This invention relates to disc brakes for but not exclusively for motor cycles.
The use of disc brakes on motor cycles is now common. On high powered motor cycles it is known to use twin disc brakes, with a disc and brake caliper being on each side of the motor cycle wheel. A typical disc used on motor cycles is fixed onto the wheel hub and the caliper straddles the outer periphery of the disc and applies a braking load to outer peripheral margin of the disc.
As the speed of motor cycles continues to increase it is necessary for there to be an increase in braking capacity. One means of achieving an increase in the braking capacity is to increase the friction area of the disc. One means of increasing the area of the disc is to increase its diameter.
This can be achieved by having a large diameter annular disc secured by its outer periphery to the wheel and having the caliper straddling the inner periphery of the disc. Such a solution is shown in British Patent 900 706, in which the diameter of the disc is maximised by attaching its outer peripheral margin directly onto the wheel rim.
A problem associated with this construction is that when the caliper is fixed to a stationary member e.g. a suspension fork leg in the case of a motor cycle, if the wheel is not correctly fitted in the forks, the wheel 'run out' at the larger diameter outer periphery is much greater than for the smaller diameter conventional brake disc.
The present invention provides a method of reducing 'run out' between the brake disc and the caliper.
Accordingly, there is provided a disc brake having an annular disc secured by its outer peripheral margin to a member rotatable about an axis and a brake capier which straddles the inner periphery of the disc, wherein the annular disc is secured to the rotatable member by fastening means which allow the disc some axial play relative to the rotatable member.
Preferably the fastening means is a bolt and there is axial clearance between the head of the bolt and the disc.
The invention will be described by way of example and with reference to the accompanying drawings in which: Fig. 1 is an assembly drawing of a disc brake according to this invention; Fig. 2 is a detailed section through the disc brake in Fig. 1; and Fig. 3 is an enlarged drawing of the disc and fastening means used in Fig. 1 and Fig. 2.
With reference to Figs. 1, 2 and 3, a disc brake caliper 11 is mounted on the stanchion 12 of a motor cycle fork leg. The brake caliper 12 is of the type in which two hydraulic cylinders 13 are arranged to press friction pads 14 against opposed friction faces of a disc 1 5.
The disc 15 is an annular disc having its outer peripheral margin fastened directly to a wheel rim 1 6. The wheel 1 6 is made of cast aluminium alloy but could be formed by other methods. There are ten or twelve circumferentially spaced bolts 1 7 which are used for fastening the disc to the wheel. The bolts 1 7 each pass through a bush 1 8 which is of a greater length than the thickness of the disc, so that when the bolt is screwed against the spacer the head of the bolt 1 7 is spaced from the wheel rim 16 by a distance of between 0.003" and 0.013" (0.08 mm-0.330 mm) in excess of the thickness of the disc.This play allows the disc to move axially relative to the axis of rotation of the wheel and thereby correct for any wheel run out within the above limits relative to the fork stanchion 12. The bushes 18 each pass through holes 19 in the disc which have some clearance (0.05"-0.06"; 1.25 mm--1.50 mm) on the radially inner edge thereof to allow for thermal expansion of the disc during the application of the brakes.
The caliper 1 2 straddles the inner periphery of the disc and the pads 14 are held in the caliper by split pins 21 which pass axially through the bottom of the caliper. The pads 14 are withdrawn from the caliper by removing the split pins 21 and withdrawing the pads radially outwardly relative to the wheel.
Whilst the invention has been described utilising bolts 1 7 as the means of fastening the disc to the wheel it is envisaged that other suitable fastening means such as shouldered bolts and shouldered studs would be suitable alternatives.
Claims
1. A disc brake having an annular disc secured by its outer peripheral margin to a member rotatable about an axis and a brake caliper which straddles the inner periphery of the disc wherein the annular disc is secured to the rotatable member by fastening means which allow the disc some axial play relative to the rotatable member.
2. A disc brake as claimed in Claim 1, wherein the rotatable member is a wheel and the disc is supported directly on the wheel rim.
3. A disc brake as claimed in Claim 1 or Claim 2, wherein the fastening means is a bolt passing through a bush which has a greater length than the thickness of the disc.
4. A disc brake as claimed in any preceeding claim, wherein the fastening means also allow for radial play between the rotatable member and the disc.
5. A disc brake substantially as described herein and as illustrated in the accompanying drawings.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (5)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Disc brakes This invention relates to disc brakes for but not exclusively for motor cycles. The use of disc brakes on motor cycles is now common. On high powered motor cycles it is known to use twin disc brakes, with a disc and brake caliper being on each side of the motor cycle wheel. A typical disc used on motor cycles is fixed onto the wheel hub and the caliper straddles the outer periphery of the disc and applies a braking load to outer peripheral margin of the disc. As the speed of motor cycles continues to increase it is necessary for there to be an increase in braking capacity. One means of achieving an increase in the braking capacity is to increase the friction area of the disc. One means of increasing the area of the disc is to increase its diameter. This can be achieved by having a large diameter annular disc secured by its outer periphery to the wheel and having the caliper straddling the inner periphery of the disc. Such a solution is shown in British Patent 900 706, in which the diameter of the disc is maximised by attaching its outer peripheral margin directly onto the wheel rim. A problem associated with this construction is that when the caliper is fixed to a stationary member e.g. a suspension fork leg in the case of a motor cycle, if the wheel is not correctly fitted in the forks, the wheel 'run out' at the larger diameter outer periphery is much greater than for the smaller diameter conventional brake disc. The present invention provides a method of reducing 'run out' between the brake disc and the caliper. Accordingly, there is provided a disc brake having an annular disc secured by its outer peripheral margin to a member rotatable about an axis and a brake capier which straddles the inner periphery of the disc, wherein the annular disc is secured to the rotatable member by fastening means which allow the disc some axial play relative to the rotatable member. Preferably the fastening means is a bolt and there is axial clearance between the head of the bolt and the disc. The invention will be described by way of example and with reference to the accompanying drawings in which: Fig. 1 is an assembly drawing of a disc brake according to this invention; Fig. 2 is a detailed section through the disc brake in Fig. 1; and Fig. 3 is an enlarged drawing of the disc and fastening means used in Fig. 1 and Fig. 2. With reference to Figs. 1, 2 and 3, a disc brake caliper 11 is mounted on the stanchion 12 of a motor cycle fork leg. The brake caliper 12 is of the type in which two hydraulic cylinders 13 are arranged to press friction pads 14 against opposed friction faces of a disc 1 5. The disc 15 is an annular disc having its outer peripheral margin fastened directly to a wheel rim 1 6. The wheel 1 6 is made of cast aluminium alloy but could be formed by other methods. There are ten or twelve circumferentially spaced bolts 1 7 which are used for fastening the disc to the wheel. The bolts 1 7 each pass through a bush 1 8 which is of a greater length than the thickness of the disc, so that when the bolt is screwed against the spacer the head of the bolt 1 7 is spaced from the wheel rim 16 by a distance of between 0.003" and 0.013" (0.08 mm-0.330 mm) in excess of the thickness of the disc.This play allows the disc to move axially relative to the axis of rotation of the wheel and thereby correct for any wheel run out within the above limits relative to the fork stanchion 12. The bushes 18 each pass through holes 19 in the disc which have some clearance (0.05"-0.06"; 1.25 mm--1.50 mm) on the radially inner edge thereof to allow for thermal expansion of the disc during the application of the brakes. The caliper 1 2 straddles the inner periphery of the disc and the pads 14 are held in the caliper by split pins 21 which pass axially through the bottom of the caliper. The pads 14 are withdrawn from the caliper by removing the split pins 21 and withdrawing the pads radially outwardly relative to the wheel. Whilst the invention has been described utilising bolts 1 7 as the means of fastening the disc to the wheel it is envisaged that other suitable fastening means such as shouldered bolts and shouldered studs would be suitable alternatives. Claims
1. A disc brake having an annular disc secured by its outer peripheral margin to a member rotatable about an axis and a brake caliper which straddles the inner periphery of the disc wherein the annular disc is secured to the rotatable member by fastening means which allow the disc some axial play relative to the rotatable member.
2. A disc brake as claimed in Claim 1, wherein the rotatable member is a wheel and the disc is supported directly on the wheel rim.
3. A disc brake as claimed in Claim 1 or Claim 2, wherein the fastening means is a bolt passing through a bush which has a greater length than the thickness of the disc.
4. A disc brake as claimed in any preceeding claim, wherein the fastening means also allow for radial play between the rotatable member and the disc.
5. A disc brake substantially as described herein and as illustrated in the accompanying drawings.
GB08126424A 1981-08-29 1981-08-29 Disc brakes Expired GB2104985B (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
GB08126424A GB2104985B (en) 1981-08-29 1981-08-29 Disc brakes
IN571/DEL/82A IN159271B (en) 1981-08-29 1982-07-27
DE8282304135T DE3266841D1 (en) 1981-08-29 1982-08-05 Disc brakes
EP82304135A EP0074181B1 (en) 1981-08-29 1982-08-05 Disc brakes
JP1982128685U JPS5896137U (en) 1981-08-29 1982-08-27 motorcycle disc brake
US06/825,697 US4716993A (en) 1981-08-29 1986-02-04 Disc brake

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08126424A GB2104985B (en) 1981-08-29 1981-08-29 Disc brakes

Publications (2)

Publication Number Publication Date
GB2104985A true GB2104985A (en) 1983-03-16
GB2104985B GB2104985B (en) 1985-06-26

Family

ID=10524244

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08126424A Expired GB2104985B (en) 1981-08-29 1981-08-29 Disc brakes

Country Status (1)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2164712A (en) * 1984-09-21 1986-03-26 Automotive Products Plc Caliper disc brake
US4662482A (en) * 1984-07-16 1987-05-05 Automotive Products Plc Brake disc assembly
DE4141525A1 (en) * 1991-12-17 1993-06-24 Christoph Hoevekenmeier Brake disc with cooling - has brake disc bolted to locating flange inside wheel rim via clamping ring
DE102008023327A1 (en) * 2008-05-13 2009-11-19 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Wheel brake for vehicle, particularly for passenger car, has annular body which is firmly arranged at vehicle wheel, where brake disk is firmly connected with annular body in circumferential direction
CN111094786A (en) * 2017-09-11 2020-05-01 美国联合金属制品股份有限公司 Disk brake rotor assembly
US11920647B2 (en) 2020-04-13 2024-03-05 Consolidated Metco, Inc. Disc brake rotor assembly

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4662482A (en) * 1984-07-16 1987-05-05 Automotive Products Plc Brake disc assembly
GB2164712A (en) * 1984-09-21 1986-03-26 Automotive Products Plc Caliper disc brake
DE4141525A1 (en) * 1991-12-17 1993-06-24 Christoph Hoevekenmeier Brake disc with cooling - has brake disc bolted to locating flange inside wheel rim via clamping ring
DE102008023327A1 (en) * 2008-05-13 2009-11-19 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Wheel brake for vehicle, particularly for passenger car, has annular body which is firmly arranged at vehicle wheel, where brake disk is firmly connected with annular body in circumferential direction
CN111094786A (en) * 2017-09-11 2020-05-01 美国联合金属制品股份有限公司 Disk brake rotor assembly
US11920647B2 (en) 2020-04-13 2024-03-05 Consolidated Metco, Inc. Disc brake rotor assembly

Also Published As

Publication number Publication date
GB2104985B (en) 1985-06-26

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee
7732 Case decided by the comptroller ** patent revoked (sect. 73(2)/1977)