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GB2439332A - A floating calliper disc brake - Google Patents

A floating calliper disc brake Download PDF

Info

Publication number
GB2439332A
GB2439332A GB0612352A GB0612352A GB2439332A GB 2439332 A GB2439332 A GB 2439332A GB 0612352 A GB0612352 A GB 0612352A GB 0612352 A GB0612352 A GB 0612352A GB 2439332 A GB2439332 A GB 2439332A
Authority
GB
United Kingdom
Prior art keywords
disc
piston
caliper
disc brake
brake
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.)
Withdrawn
Application number
GB0612352A
Other versions
GB0612352D0 (en
Inventor
Fra Giovanni
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 Italia SV SRL
Original Assignee
Automotive Products Italia SV SRL
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 Italia SV SRL filed Critical Automotive Products Italia SV SRL
Priority to GB0612352A priority Critical patent/GB2439332A/en
Publication of GB0612352D0 publication Critical patent/GB0612352D0/en
Priority to PCT/IB2007/002407 priority patent/WO2007148227A1/en
Publication of GB2439332A publication Critical patent/GB2439332A/en
Priority to GB0822785A priority patent/GB2452000A/en
Withdrawn legal-status Critical Current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
    • F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
    • F16D55/24—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with a plurality of axially-movable discs, lamellae, or pads, pressed from one side towards an axially-located member
    • F16D55/26—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with a plurality of axially-movable discs, lamellae, or pads, pressed from one side towards an axially-located member without self-tightening action
    • F16D55/28—Brakes with only one rotating disc
    • F16D55/30—Brakes with only one rotating disc mechanically actuated
    • 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
    • F16D55/224—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 common actuating member for the braking members
    • F16D55/225—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 common actuating member for the braking members the braking members being brake pads
    • F16D55/226—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 common actuating member for the braking members the braking members being brake pads in which the common actuating member is moved axially, e.g. floating caliper disc brakes
    • 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
    • F16D55/224—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 common actuating member for the braking members
    • F16D55/225—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 common actuating member for the braking members the braking members being brake pads
    • F16D55/226—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 common actuating member for the braking members the braking members being brake pads in which the common actuating member is moved axially, e.g. floating caliper disc brakes
    • F16D55/2265—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 common actuating member for the braking members the braking members being brake pads in which the common actuating member is moved axially, e.g. floating caliper disc brakes the axial movement being guided by one or more pins engaging bores in the brake support or the brake housing
    • F16D55/22655—Constructional details of guide pins
    • 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
    • F16D55/224—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 common actuating member for the braking members
    • F16D55/225—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 common actuating member for the braking members the braking members being brake pads
    • F16D55/226—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 common actuating member for the braking members the braking members being brake pads in which the common actuating member is moved axially, e.g. floating caliper disc brakes
    • F16D55/2265—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 common actuating member for the braking members the braking members being brake pads in which the common actuating member is moved axially, e.g. floating caliper disc brakes the axial movement being guided by one or more pins engaging bores in the brake support or the brake housing
    • F16D55/227—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 common actuating member for the braking members the braking members being brake pads in which the common actuating member is moved axially, e.g. floating caliper disc brakes the axial movement being guided by one or more pins engaging bores in the brake support or the brake housing by two or more pins
    • 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
    • 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
    • F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
    • 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
    • F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
    • F16D65/16—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake
    • F16D65/18—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together, e.g. for disc brakes
    • 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
    • F16D65/38—Slack adjusters
    • F16D65/40—Slack adjusters mechanical
    • F16D65/42—Slack adjusters mechanical non-automatic
    • F16D65/46—Slack adjusters mechanical non-automatic with screw-thread and nut
    • 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
    • F16D65/38—Slack adjusters
    • F16D65/40—Slack adjusters mechanical
    • F16D65/52—Slack adjusters mechanical self-acting in one direction for adjusting excessive play
    • F16D65/56—Slack adjusters mechanical self-acting in one direction for adjusting excessive play with screw-thread and nut
    • F16D65/567—Slack adjusters mechanical self-acting in one direction for adjusting excessive play with screw-thread and nut for mounting on a disc brake
    • 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
    • F16D2121/00—Type of actuator operation force
    • F16D2121/14—Mechanical
    • 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
    • F16D2125/00—Components of actuators
    • F16D2125/18—Mechanical mechanisms
    • F16D2125/20—Mechanical mechanisms converting rotation to linear movement or vice versa
    • F16D2125/34—Mechanical mechanisms converting rotation to linear movement or vice versa acting in the direction of the axis of rotation
    • F16D2125/36—Helical cams, Ball-rotating ramps

Landscapes

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

Abstract

A floating caliper disc brake comprises a calliper support structure 11 (eg. torque plate, carrier) for attachment to a vehicle, and a caliper 14 which is mounted on the support structure such that it is able to slide relative to the disc 13, said caliper including an actuation piston 15. When the piston is actuated to engage the brakes, the calliper will slide so that both brake pads 18a, 18b are brought into contact with the brake disc. The sliding displacement (X) of the brake calliper 14 relative to the torque plate 11 is guided by the engagement of the piston 15 in a bore 17 formed in the torque plate. The piston is ideally hydraulically actuated. In addition, a park brake facility 28 may be incorporated which uses a ball and ramp expander mechanism 24 to move the piston. The calliper may comprise an axially adjustable screw adjuster 36 to compensate for pad wear.

Description

<p>I</p>
<p>DISC BRAKES</p>
<p>This invention relates to disc brakes and in particular, though not exclusively, to such brakes designed to provide a handbrake function.</p>
<p>Disc brakes are well known which comprise:- -a support structure for attachment to a vehicle; -a caliper which spans an associated disc and is supported for sliding relative to the disc on the support structure; -the caliper including an actuation piston which is moveable within the caliper in a direction generally parallel to an axis of rotation of the associated disc to move a first brake pad into contact with a first side of the associated disc and to cause sliding displacement of the calliper relative to the support structure to draw a second brake pad into contact with the other side of the disc.</p>
<p>Such disc brakes are hereinafter referred to as being of the kind specified.</p>
<p>It is an object of the present invention to provide a disc brake of the kind specified which is relatively cheap to manufacture and which can therefore provide an economical handbrake function.</p>
<p>Thus in accordance with the present invention there is provided a disc brake of the kind specified in which the sliding displacement of the caliper relative to the support structure is guided by the engagement of the piston in a bore in the support structure.</p>
<p>The brake pads may be supported on opposite sides of the disc on the support structure.</p>
<p>The support structure may have an inverted U-shaped portion with one arm of the inverted U-shaped section designed to be located on one side of the disc and the other arm of the inverted U-shaped portion designed to be located on the other side of the disc with a brake pad located and supported in each respective arm of the inverted U-shaped portion.</p>
<p>Preferably guide means on the caliper may co-operate with guide means on the support structure to prevent rotation of the caliper relative to the support structure when the brake is applied.</p>
<p>Conveniently the caliper may be provided with a pair of circumferentially extending forks which each engage a respective guide pin carried by the support structure which extends generally parallel to the axis of rotation of the associated disc.</p>
<p>The piston is preferably housed in a bore in the caliper and is moved relative to the caliper to apply the brake by a ball and ramp expander mechanism. This provides a disc brake construction which is particularly suitable for the provision of a handbrake function.</p>
<p>The ball and ramp expander mechanism may comprise first and second confronting ramp members with pairs of co-operating ball ramp pockets each containing an actuating ball, one of the ramp members being rotatable to apply the brake and one of the ramp members reacting against an axial support bearing supported against an axially adjustable adjuster member, the axially adjustable adjuster member allowing adjustment of a retracted position of the piston in the caliper bore to adjust the pad to disc clearance when the brake is released.</p>
<p>Conveniently the axially adjustable adjuster member may comprise an externally threaded nut which is in screw-threaded engagement with an internally threaded portion of the caliper bore and is rotatable in the bore to adjust the retracted position of the piston.</p>
<p>The externally threaded nut conveniently also has a formation engageable by a spanner or similar tool to rotate the nut in the bore.</p>
<p>A return spring for the ball and ramp expander may be housed within the piston.</p>
<p>A brake actuating lever is preferably rotationally connected with one of the ramp members.</p>
<p>One embodiment of the present invention will now be described, by way of example only, with reference to the accompanying drawings in which:-Figure 1 and figure 2 both show perspective views of a disc brake in accordance with the present invention, and Figure 3 shows a cross section through the disc brake of figures 1 and 2.</p>
<p>Referring to the drawings, a disc brake 10 has a support structure in the form of a support bracket 11 which is bolted to the suspension of an associated vehicle via holes 12. The support bracket 11 is of inverted U-shaped form with an inner arm 1 Ia which includes the attachment holes 12 and an outer arm 11 b which is disposed on the other side of the brake disc 13 which is shown diagrammatically in figure 3.</p>
<p>Mounted on the support bracket 11 is a caliper body 14 which supports an actuating piston 15 in a bore 16. The piston 15 also slides in a bore 17 in the support bracket arm 1 la and thus guides the caliper body 14 for sliding relative to the disc 13 as indicated by arrow X in figure 3.</p>
<p>Mounted on either side of the disc 13 are brake pads 1 8a and 1 8b. Pad 1 8a is brought into contact with a disc by direct contact from piston 15 and pad I 8b is brought into contact with the disc by sliding of the caliper body which draws the pad I Sb into contact with the disc via limb 19 of the caliper body.</p>
<p>As will be appreciated, the pads 18a and 18b are supported during braking by recesses formed in the support bracket arms 11 a and 11 b respectively.</p>
<p>Rotation of the caliper body 14 relative to the support bracket 11 is resisted by a pair of forks 20 formed on the caliper body which engage guide pins 21 carried on the support bracket 11. Forks 20 slide on pins 21 when the brake is applied and released.</p>
<p>A set screw 22 enters a slot 23 formed in piston 15 to prevent rotation of the piston relative to the bore 16 in the caliper body.</p>
<p>The piston 15 is moved axially relative to the caliper body 14 by a ball and ramp expander mechanism 24 which comprises confronting ramp members 25 and 26 which include pairs of cooperating ramp pockets 25a and 26a respectively each containing an actuating ball 27.</p>
<p>Ramp member 25 is rotated relative to ramp member 26 by an actuating lever 28 which is operated by a cable 28a with the outer sheath 28b of the cable supported on a reaction member 29 as indicated diagrammatically in dotted detail in figure 2.</p>
<p>Ramp member 25 is screw threaded onto a bolt 30 at 31 and mounts a return spring 32 within pistOn 15. Spring 32 acts between a head 33 of bolt 31 and an abutment surface 34 on the piston 15 to provide a return force which returns the ball and ramp expander mechanism 24 to its non actuating position when the actuating lever 28 is released. A clamping nut 30a holds the bolt 30, the lever 28 and the ramp member in a fixed position relative to each other. A cap 1 5a seals the inside of piston 15.</p>
<p>Ramp member 25 is axially supported by thrust bearing 35 which reacts against an adjuster member 36 which is in screw threaded engagement at 37 with the bore 16 in the caliper body. The axial position of adjuster member 36 in the screw threaded bore 37 is adjustable by using a spanner or other suitable tool on flats 38 provided on the outer end of adjuster member 36.</p>
<p>S</p>
<p>As will be appreciated the axial position of adjuster member 36 in screw threaded bore 37 determines the position to which piston 15 is drawn by spring 32 when the actuating lever 28 is released. Thus as the pads 1 8a, 1 8b wear, the position of piston 15 in bore 37 is adjusted towards the disc 13 to compensate for the pad wear.</p>
<p>In order to access the flats 38 on adjuster member 36 a rubber sealing bellows 39 must be first displaced axially towards the end rim 40 of the caliper body.</p>
<p>A further sealing bellows 41 is provided between the support bracket 11 and the caliper body 14.</p>
<p>As will be appreciated the disc brake of the present invention provides a simple but effective braking mechanism in which the sliding of the caliper body 14 relative to the support bracket 11 is simply and efficiently achieved by the sliding of piston 15 in the bore 17 in limb 11 a of the support bracket. This provides a caliper construction which is particularly suitable for use as a hand brake for a vehicle.</p>

Claims (1)

  1. <p>CLAIMS</p>
    <p>1. A disc brake of the kind specified in which the sliding displacement of the caliper relative to the support structure is guided by the engagement of the piston in a bore formed in the support structure.</p>
    <p>2. A disc brake according to claim I in which the brake pads are supported on opposite sides of the disc on the support structure.</p>
    <p>3. A disc brake according to claim 2 in which the support structure has an inverted U-shaped portion with one arm of the inverted U-shaped section designed to be located on one side of the disc and the other arm of the inverted U-shaped portion designed to be located on the other side of the disc with a brake pad located and supported in each respective arm of the inverted U-shaped portion.</p>
    <p>4. A disc brake according to any one of claims 1 to 3 in which the caliper co-operate with guide means on the support structure to prevent rotation of the caliper relative to the support structure when the brake is applied.</p>
    <p>5. A disc brake according to claim 4 in which the calliper is provided with a pair of circumferentially extending forks which each engage a respective guide pin carried by the support structure which extends generally parallel to the axis of rotation of the associated disc.</p>
    <p>6. A disc brake according to any one of claims I to 5 in which the piston is housed in a bore in the caliper and is moved relative to the caliper to apply the brake by a ball and ramp expander mechanism.</p>
    <p>7. A disc brake according to claim 6 in which the ball and ramp expander mechanism comprises first and second confronting ramp members with pairs of co-operating ball ramp pockets each containing an actuating ball, one of the ramp members being rotatable to apply the brake and, one of the ramp members reacting against an axial support bearing supported against an axially adjustable adjuster member, the axially adjustable adjuster member allowing adjustment of a retracted position of the piston in the caliper bore to adjust the pad to disc clearance when the brake is released and thus compensate for pad wear.</p>
    <p>8. A disc brake according to claim 7 in which the axially adjustable adjuster member comprises an externally threaded nut which is in screw-threaded engagement with an internally threaded portion of the caliper bore and is rotatable in the bore to adjust the retracted position of the piston and hence compensate for pad wear.</p>
    <p>9. A disc brake according to claim 8 in which the externally threaded nut also has a formation engageable by a spanner or similar tool to rotate the nut in the bore.</p>
    <p>10. A disc brake according to any one of claims 6 to 9 in which a return spring for the ball and ramp expander is housed within the piston.</p>
    <p>11. A disc brake according to any one of claims 7 to 10 in which a brake actuating lever is rotationally connected with one of ramp members.</p>
    <p>12. A disc brake of the kind specified constructed and arranged substantially as hereinbefOre described with reference to and as shown in the accompanying drawings.</p>
GB0612352A 2006-06-22 2006-06-22 A floating calliper disc brake Withdrawn GB2439332A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB0612352A GB2439332A (en) 2006-06-22 2006-06-22 A floating calliper disc brake
PCT/IB2007/002407 WO2007148227A1 (en) 2006-06-22 2007-06-07 Disk brakes
GB0822785A GB2452000A (en) 2006-06-22 2008-12-15 Disk brakes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0612352A GB2439332A (en) 2006-06-22 2006-06-22 A floating calliper disc brake

Publications (2)

Publication Number Publication Date
GB0612352D0 GB0612352D0 (en) 2006-08-02
GB2439332A true GB2439332A (en) 2007-12-27

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Family Applications (2)

Application Number Title Priority Date Filing Date
GB0612352A Withdrawn GB2439332A (en) 2006-06-22 2006-06-22 A floating calliper disc brake
GB0822785A Withdrawn GB2452000A (en) 2006-06-22 2008-12-15 Disk brakes

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB0822785A Withdrawn GB2452000A (en) 2006-06-22 2008-12-15 Disk brakes

Country Status (2)

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GB (2) GB2439332A (en)
WO (1) WO2007148227A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3321535A4 (en) * 2015-07-09 2019-03-27 Akebono Brake Industry Co., Ltd. Disc brake device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101816397B1 (en) * 2016-05-04 2018-01-08 현대자동차주식회사 Electro-Mechanical Brake
EP4394201A1 (en) * 2021-09-30 2024-07-03 Huawei Technologies Co., Ltd. Brake assembly, brake system, vehicle, and control method for brake system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1257615A (en) * 1969-07-24 1971-12-22
US3910385A (en) * 1974-04-18 1975-10-07 Goodrich Co B F Disc brake caliper and mounting structure
US3944028A (en) * 1973-08-20 1976-03-16 Tokico Ltd. Disc brake and actuator assembly structure
GB1546862A (en) * 1976-03-23 1979-05-31 Tokico Ltd Disc brakes
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GB0612352D0 (en) 2006-08-02
GB0822785D0 (en) 2009-01-21
GB2452000A (en) 2009-02-18

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