WO2008079087A1 - Method and device for disc brakes and vehicle - Google Patents
Method and device for disc brakes and vehicle Download PDFInfo
- Publication number
- WO2008079087A1 WO2008079087A1 PCT/SE2007/050988 SE2007050988W WO2008079087A1 WO 2008079087 A1 WO2008079087 A1 WO 2008079087A1 SE 2007050988 W SE2007050988 W SE 2007050988W WO 2008079087 A1 WO2008079087 A1 WO 2008079087A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- brake
- disc
- centreline
- block
- brake block
- Prior art date
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
- F16D55/02—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
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- 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
- F16D65/02—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
- F16D65/097—Resilient means interposed between pads and supporting members or other brake parts
- F16D65/0973—Resilient means interposed between pads and supporting members or other brake parts not subjected to brake forces
- F16D65/0974—Resilient means interposed between pads and supporting members or other brake parts not subjected to brake forces acting on or in the vicinity of the pad rim in a direction substantially transverse to the brake disc axis
- F16D65/0977—Springs made from sheet metal
-
- 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
- F16D2127/00—Auxiliary mechanisms
- F16D2127/02—Release mechanisms
Definitions
- the present invention relates to a method according to the introductory part of the attached claim 1.
- the invention relates further to a device according to the introductory part of the attached claim 3.
- the invention also relates to a vehicle according to claim 8.
- a disc brake for a vehicle wheel comprises a brake yoke arranged relative to the shaft of the wheel and adapted to acting upon two brake blocks which are disposed on opposite sides of a brake disc arranged relative to the wheel shaft and which each comprise a friction surface in the form of a brake lining.
- the brake blocks are adapted to being kept applied by a lining holder which is caused to act against one spring per brake block, which springs are adapted to pushing the brake blocks in a substantially radial direction of the brake disc, substantially towards the centre of the latter in order to keep the brake blocks in position.
- a problem of disc brakes is that the brake blocks with their brake linings abut against the brake disc even when the brake is not applied by the brake cylinder of the brake yoke, causing a retardatory dragging moment and hence both unnecessary wear and redundant fuel consumption.
- Known devices for solving the problem described above have proved to be complicated and expensive to manufacture.
- the object of the present invention is to provide a solution to the problem described above and thereby eliminate said retardatory dragging moment.
- Fig. 1 depicts schematically an axial section through the disc brake's brake disc with brake linings fitted.
- ref. 1 denotes a brake disc of a disc brake and ref. 2 the centreline of the brake disc.
- the respective sides of the brake disc are provided with mutually opposite brake blocks 3 adapted to being applied, by an undepicted brake cylinder of a brake yoke, against the brake disc in order to abut brakingly against the brake disc.
- Each brake block 3 has a brake lining 4 adapted to exerting, by friction against a side 1 ', 1" of the brake disc, a braking moment on the brake disc and to being supported by a usually metallic backup plate 5, most commonly made of steel.
- each brake block rest in an only schematically depicted lining holder 6 on each side of the brake disc, each brake block being adapted to being kept in position, by spring loading, in the lining holder by a brake block retainer 8 arranged relative to the portion 7 of the brake block which points away from the centreline of the brake disc and adapted to pressing on the respective brake block's spring 9 situated between the brake block and the brake block retainer.
- Each brake block is also adapted to being supported, by a bottom portion 11 of the lining holder, relative to its portion 10 which points towards the centreline of the brake disc.
- each brake block is arranged in combination with a ramp 12 of the bottom portion of the lining holder which slopes from the brake disc and towards the centreline of the brake disc, as schematically depicted in Fig. 1, at the portion 10 of the brake block which points towards said centreline.
- the brake cylinder of the brake yoke is adapted to assuming an unapplied first state and an applied second state, in which second state the brake blocks of the disc brake assume a position applied against the brake disc, substantially as depicted in Fig. 1, whereby according to the invention, when the brake cylinder is in said unapplied state, each brake block is adapted to being allowed to move away from the brake disc along said ramp under the influence and by utilisation of vibrations occurring in the disc brake during motion of the respective undepicted vehicle, which vibrations are transmitted to the brake yoke inter alia from the respective wheel via the undepicted wheel shaft. Assurance is thus afforded that the respective brake block will assume an unapplied position and not exert any retardatory dragging moment on the brake disc.
- the brake block retainer of the disc brake is, in a substantially corresponding manner, provided with a configuration 8' sloping from the brake disc and away from the centreline of the brake disc on each side of the brake disc, as schematically depicted in Fig. 1 , and when the brake cylinder is in said unapplied state, each brake block is adapted to its portion 7 which points away from said centreline being allowed to move away from the brake disc relative to said brake block retainer under the influence and with utilisation of vibrations occurring in the disc brake during motion of the vehicle, which vibrations, as previously mentioned, are transmitted to the brake yoke inter alia from the respective wheel via the wheel shaft.
- the brake block's assumption of an unapplied position across its whole surface 10 which faces towards the brake disc is thus facilitated.
- each brake block is arranged in combination with a ramp which slopes from the brake disc and towards the centreline of the brake disc, whereby the perpendicular force on each brake block at the ramp acquires a component directed away from the brake disc so that the brake block endeavours, as a result of vibrations occurring in the brake yoke, to move away from the brake disc.
- a preferred corresponding configuration of the disc brake's brake block retainer close to the respective brake block's portion pointing away from said centreline, results in a component corresponding to the perpendicular force on the brake block via the latter' s spring so that this portion of the brake block also endeavours to move away from the brake disc.
- said sloping ramp is arranged for low friction, which primarily means little contact surface relative to the brake block's portion which points towards said centreline. It is preferred in this respect that the ramp comprise at least two ramp portions distributed along the width direction of the brake block or, if so desired, the circumferential direction of the brake disc, each ramp portion being of small extent in said width direction.
- the respective spring be movable together with the brake block which it is adapted to springingly holding down.
Abstract
A method for reliable non-application of the brake blocks (3) of a vehicle disc brake, comprising the step of putting the brake cylinder of the disc brake's brake yoke into an unapplied state. The method is particularly distinguished by the steps of - arranging each brake block (3) in combination with a ramp (12) which slopes from the brake disc (1) and towards the centreline (2) of the brake disc at the brake block's portion (10) which points towards said centreline and - allowing each brake block to move away from the brake disc along said ramp by utilisation of vibrations which occur in the disc brake during motion of the vehicle. The invention also relates to a device for reliable non-application, and to a vehicle.
Description
METHOD AND DEVICE FOR DISC BRAKES AND VEHICLE
BACKGROUND
Technical field
The present invention relates to a method according to the introductory part of the attached claim 1.
The invention relates further to a device according to the introductory part of the attached claim 3.
The invention also relates to a vehicle according to claim 8.
State of the art
A disc brake for a vehicle wheel comprises a brake yoke arranged relative to the shaft of the wheel and adapted to acting upon two brake blocks which are disposed on opposite sides of a brake disc arranged relative to the wheel shaft and which each comprise a friction surface in the form of a brake lining.
The brake blocks are adapted to being kept applied by a lining holder which is caused to act against one spring per brake block, which springs are adapted to pushing the brake blocks in a substantially radial direction of the brake disc, substantially towards the centre of the latter in order to keep the brake blocks in position.
A problem of disc brakes is that the brake blocks with their brake linings abut against the brake disc even when the brake is not applied by the brake cylinder of the brake yoke, causing a retardatory dragging moment and hence both unnecessary wear and redundant fuel consumption.
Known devices for solving the problem described above have proved to be complicated and expensive to manufacture.
OBJECT OF THE INVENTION
The object of the present invention is to provide a solution to the problem described above and thereby eliminate said retardatory dragging moment.
SUMMARY OF THE INVENTION
The object as above is achieved by a method, a device and a vehicle, e.g. a truck, with features according to claims 1 , 3 and 8 respectively.
Further advantages are afforded by features according to the dependent claims.
BRIEF DESCRIPTION OF THE DRAWING
The present invention will be better understood in the light of the following detailed description read in combination with the attached drawing, in which
- Fig. 1 depicts schematically an axial section through the disc brake's brake disc with brake linings fitted.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
In Fig. 1, ref. 1 denotes a brake disc of a disc brake and ref. 2 the centreline of the brake disc.
The respective sides of the brake disc are provided with mutually opposite brake blocks 3 adapted to being applied, by an undepicted brake cylinder of a brake yoke, against the brake disc in order to abut brakingly against the brake disc.
Each brake block 3 has a brake lining 4 adapted to exerting, by friction against a side 1 ', 1" of the brake disc, a braking moment on the brake disc and to being supported by a usually metallic backup plate 5, most commonly made of steel.
The brake blocks rest in an only schematically depicted lining holder 6 on each side of the brake disc, each brake block being adapted to being kept in position, by spring loading, in the lining holder by a brake block retainer 8 arranged relative to the portion 7 of the brake block which points away from the centreline of the brake disc and adapted to pressing on the respective brake block's spring 9 situated between the brake block and the brake block retainer.
Each brake block is also adapted to being supported, by a bottom portion 11 of the lining holder, relative to its portion 10 which points towards the centreline of the brake disc.
According to the invention, each brake block is arranged in combination with a ramp 12 of the bottom portion of the lining holder which slopes from the brake disc and towards the centreline of the brake disc, as schematically depicted in Fig. 1, at the portion 10 of the brake block which points towards said centreline.
The brake cylinder of the brake yoke is adapted to assuming an unapplied first state and an applied second state, in which second state the brake blocks of the disc brake assume a position applied against the brake disc, substantially as depicted in Fig. 1, whereby according to the invention, when the brake cylinder is in said unapplied state, each brake block is adapted to being allowed to move away from the brake disc along said ramp under the influence and by utilisation of vibrations occurring in the disc brake during motion of the respective undepicted vehicle, which vibrations are transmitted to the brake yoke inter alia from the respective wheel via the undepicted wheel shaft. Assurance is thus afforded that the respective brake block will assume an unapplied position and not exert any retardatory dragging moment on the brake disc.
According to preferred embodiments, the brake block retainer of the disc brake is, in a substantially corresponding manner, provided with a configuration 8' sloping from the brake disc and away from the centreline of the brake disc on each side of the brake disc, as schematically depicted in Fig. 1 , and when the brake cylinder is in said unapplied state, each brake block is adapted to its portion 7 which points away from said centreline being allowed to move away from the brake disc relative to said brake block retainer under the influence and with utilisation of vibrations occurring in the disc brake during motion of the vehicle, which vibrations, as previously mentioned, are transmitted to the brake yoke inter alia from the respective wheel via the wheel shaft. The brake block's assumption of an unapplied position across its whole surface 10 which faces towards the brake disc is thus facilitated.
The method and the function of the device according to the invention are probably substantially and sufficiently indicated by the above description.
With the object of ensuring that no brake blocks abut against the brake disc when the brake cylinder assumes its unapplied position and no braking is therefore intended, each brake block is arranged in combination with a ramp which slopes from the brake disc and towards the centreline of the brake disc, whereby the perpendicular force on each brake block at the ramp acquires a component directed away from the brake disc so that the brake block endeavours, as a result of vibrations occurring in the brake yoke, to move away from the brake disc.
A preferred corresponding configuration of the disc brake's brake block retainer, close to the respective brake block's portion pointing away from said centreline, results in a component corresponding to the perpendicular force on the brake block via the latter' s spring so that this portion of the brake block also endeavours to move away from the brake disc.
Assurance is thus afforded that each brake block will move away from the brake disc, thereby preventing retardatory dragging moment, when no braking is intended.
The invention is described above in relation to preferred embodiments and embodiment examples.
Further embodiments and minor additions and modifications are of course conceivable without departing from the fundamental concept of the invention.
According to preferred embodiments, said sloping ramp is arranged for low friction, which primarily means little contact surface relative to the brake block's portion which points towards said centreline. It is preferred in this respect that the ramp comprise at least two ramp portions distributed along the width direction of the brake block or, if so desired, the circumferential direction of the brake disc, each ramp portion being of small extent in said width direction.
It is further preferred that the respective spring be movable together with the brake block which it is adapted to springingly holding down.
The invention is therefore not to be regarded as limited to the embodiments indicated above but may be varied within its scope indicated by the attached claims.
Claims
1. A method for reliable non-application of the brake blocks of a vehicle disc brake, comprising the step of putting the brake cylinder of the disc brake's brake yoke into an unapplied state, characterised by the steps of
- arranging each brake block (3) in combination with a ramp (12) which slopes from the brake disc (1) and towards the centreline (2) of the brake disc at the brake block's portion (10) which points towards said centreline,
- allowing each brake block to move away from the brake disc along said ramp by utilisation of vibrations which occur in the disc brake during motion of the vehicle,
- providing the disc brake's brake block retainer (8), which presses the respective brake block's spring (9) substantially towards the centreline of the brake disc at the respective brake block's portion 7 which points away from said centreline, with a configuration (8') which slopes from the brake disc and away from said centreline, and
- allowing each brake block's said portion 7 pointing away from the centreline to move away from the brake disc relative to said brake block retainer by utilisation of vibrations which occur in the disc brake during motion of the vehicle.
2. A device for reliable non-application of the brake blocks of a vehicle disc brake, comprising a brake yoke with a brake cylinder adapted to assuming an unapplied first state and an applied second state, in which second state the disc brake's brake blocks arranged on mutually opposite sides of the disc brake's brake disc assume an applied position for braking, characterised in that each brake block (3) is arranged in combination with a ramp (12) sloping from the brake disc (1) and towards the centreline (2) of the brake disc at the brake block's portion (10) which points towards said centreline, and that each brake block is adapted, when the brake cylinder is in said unapplied state, to being allowed to move away from the brake disc along said ramp by utilisation of vibrations which occur in the disc brake during motion of the vehicle, and that the disc brake's brake block retainer (8), which is adapted to pushing the respective brake block's spring (9) substantially towards the centreline of the brake disc at the portion 7 which points away from said centreline, is provided with a configuration (8') which slopes from the brake disc and away from said centreline, and that each brake block, when the brake cylinder is in said unapplied state, is adapted to its portion 7 which points away from said centreline being allowed to move away from the brake disc relative to said brake block retainer by utilisation of vibrations which occur in the disc brake during motion of the vehicle.
3. A device according to claim 2, characterised in that said ramp is provided with a relatively small surface in the respective brake lining's width direction in order to achieve low friction force during movement away from the brake disc.
4. A device according to claim 3, characterised in that said ramp comprises at least two ramp portions distributed along the brake block's width direction, each ramp portion being of small extent in said width direction.
5. A device according to claim 2, 3 or 4, characterised in that the respective spring (9) is movable together with the brake block which it is adapted to springingly holding down.
6. A vehicle, e.g. a truck, characterised in that it is provided with at least one disc brake comprising a device according to any one of claims 2-5.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE0602787A SE530705C2 (en) | 2006-12-22 | 2006-12-22 | Mode and arrangement of disc brake and vehicle |
| SE0602787-4 | 2006-12-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2008079087A1 true WO2008079087A1 (en) | 2008-07-03 |
Family
ID=39562770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/SE2007/050988 WO2008079087A1 (en) | 2006-12-22 | 2007-12-13 | Method and device for disc brakes and vehicle |
Country Status (2)
| Country | Link |
|---|---|
| SE (1) | SE530705C2 (en) |
| WO (1) | WO2008079087A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102011816A (en) * | 2010-12-01 | 2011-04-13 | 东风汽车有限公司 | Disc brake with friction block return structure |
| DE102016120481A1 (en) * | 2016-10-27 | 2018-05-03 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Disc brake for a commercial vehicle and brake pad set |
| DE102016120478A1 (en) * | 2016-10-27 | 2018-05-03 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Disc brake for a commercial vehicle and brake pad for a disc brake |
| DE102022107382A1 (en) | 2022-03-29 | 2023-10-05 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Brake caliper arrangement for a braking device of a motor vehicle |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4418703A1 (en) * | 1994-05-28 | 1995-11-30 | Bayerische Motoren Werke Ag | Vehicle caliper brake shoe pad face stops |
-
2006
- 2006-12-22 SE SE0602787A patent/SE530705C2/en not_active IP Right Cessation
-
2007
- 2007-12-13 WO PCT/SE2007/050988 patent/WO2008079087A1/en active Application Filing
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4418703A1 (en) * | 1994-05-28 | 1995-11-30 | Bayerische Motoren Werke Ag | Vehicle caliper brake shoe pad face stops |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102011816A (en) * | 2010-12-01 | 2011-04-13 | 东风汽车有限公司 | Disc brake with friction block return structure |
| DE102016120481A1 (en) * | 2016-10-27 | 2018-05-03 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Disc brake for a commercial vehicle and brake pad set |
| DE102016120478A1 (en) * | 2016-10-27 | 2018-05-03 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Disc brake for a commercial vehicle and brake pad for a disc brake |
| WO2018077785A1 (en) * | 2016-10-27 | 2018-05-03 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Disk brake for a utility vehicle, and brake pad and brake bracket for a disk brake |
| DE102022107382A1 (en) | 2022-03-29 | 2023-10-05 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Brake caliper arrangement for a braking device of a motor vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| SE530705C2 (en) | 2008-08-19 |
| SE0602787L (en) | 2008-06-23 |
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