WO2002077483A1 - Method and apparatus for disc brake construction - Google Patents
Method and apparatus for disc brake construction Download PDFInfo
- Publication number
- WO2002077483A1 WO2002077483A1 PCT/GB2002/001191 GB0201191W WO02077483A1 WO 2002077483 A1 WO2002077483 A1 WO 2002077483A1 GB 0201191 W GB0201191 W GB 0201191W WO 02077483 A1 WO02077483 A1 WO 02077483A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- caliper
- disc
- brake
- rotatable
- mounting
- 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
- F16D55/24—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
- F16D55/36—Brakes with a plurality of rotating discs all lying side by side
- F16D55/40—Brakes with a plurality of rotating discs all lying side by side actuated by a fluid-pressure device arranged in or one the brake
-
- 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
- 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
- F16D2055/0012—Brake supports integral with vehicle suspension
-
- 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
- F16D2055/0016—Brake calipers
-
- 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
- F16D2055/0062—Partly lined, i.e. braking surface extending over only a part of the disc circumference
Definitions
- This invention relates to a method and apparatus for disc brake construction. More particularly but not exclusively the invention relates to the construction of the caliper of a spot-type automotive disc brake having one or more axially slidable discs.
- the described embodiments of the invention relate to such a disc brake. Wider aspects of the invention may find application outside this particular field.
- brake weight is an important factor affecting acceptability of a given brake design.
- the brake construction represents part of the unsprung weight of the vehicle which is a vehicle design parameter not to be increased significantly without the attainment of a compensating advantage .
- An object of the present invention is to provide disc brake apparatus and a method for constructing same wherein improvements are provided in relation to one or more of the constructional and/or weight factors discussed above, or improvements generally.
- a brake construction in which integration of the main structural elements of a brake caliper construction by the use of casting techniques enables the provision of the requisite strength attributes in combination with an important contribution to weight moderation in a cost- effective manner.
- the illustrated embodiments of the invention make, an important contribution to production simplification and weight-moderating parameters of the brake construction in a manner which combines a meeting of the several design criteria discussed above and so as to meet the stringent parameters applicable to the provision of a disc brake for mass production vehicle utilisation purposes.
- An aspect of the construction adopted in the illustrated embodiments relates to the mode of insertion into the brake assembly of the friction elements with their pads of friction material. This complements the construction adopted for the major elements of the caliper construction itself .
- the illustrated embodiments adopt a design approach in which provision is made, in combination with the integrated construction feature already mentioned, for the mounting of the friction elements in relation to the caliper structure itself in a manner which significantly simplifies the operations required for friction element assembly and service replacement .
- the caliper construction adopts the use of a space-defining open construction for the generally frame-like caliper structure so that space is provided for the facility to insert the friction elements in an edgewise manner through the space defined by the caliper structure and into the relevant space alongside the brake disc (or the relevant one of the brake discs in a multi-disc brake) without the need for any significant disassembly other than (in some cases) the prior removal of resilient means (such as a leaf spring) which is provided to act between the caliper and the friction element for maintenance of disc-to-friction element co-planarity and related dynamic control requirements .
- resilient means such as a leaf spring
- the illustrated embodiments of the invention offer a caliper construction in which not only are the factors relating to construction simplification, reduced assembly time, mitigation of the tendency for improved construction to add to the unsprung weight of the vehicle, and the other related factors discussed above, treated in a manner which offers a significantly better compromise between their hitherto somewhat conflicting requirements, but also the brake itself has those important service and use advantages which come from ease of assembly and replacement of the most frequently -required service components. In this way maintenance costs are reduced for the user, which is always a potent factor persuasive for the practical utilisation of a brake construction.
- An aspect of the integrated construction disclosed herein relates to the strength to weight ratio and the provision of such in an economical manner having regard to both hardware costs and assembly costs as discussed above.
- a further important aspect of the structure and function of the described embodiments relates to the integration of the entire caliper structure (including the middle or bridging portion and the end plate or stop of the caliper) into the disc brake structure as a whole, notably the main support structure (of the disc brake) namely the mounting block or post (usually a casting) in which the brake's actuating piston and cylinder assembly are located.
- the caliper structure is thus the non- rotatable reference base which serves to resist the rotary friction forces generated during braking as well as to provide that structure which needs substantial strength in the tension-resisting sense in order to enable the substantial compressive forces required during braking to be applied to the pair or pairs of friction elements between which the disc or discs are interleaved.
- disc brakes of the fixed disc and pivoted caliper kind are provided with substantial casting-type caliper constructions, but the circumstances of use and the force regime in fixed disc brakes differ substantially from those of disc brakes in which the discs are actually floating, and therefore provide little if any guidance as to the cost- effective manner in which to provide a structure capable of dealing with the forces arising in such a (sliding disc) brake .
- the constructional approach adopted is to provide a caliper structure for the brake, which is provided with mid (bridging) and end
- (lateral) portions capable of transmitting (respectively) the tension and tension-produced bending forces and loads, and which is adapted to be integrated with the main non- rotatable supporting structure of the brake in the sense of transmitting thereto the braking-generated loads as part of the rigid structure thereof .
- the caliper comprises a disc-bridging portion which is formed integrally (by being part of a unitary casting) with the main brake pillar or wheel- mounting casting.
- the caliper bridge portion projects from that casting and provides a structurally efficient extension thereof which provides a way for meeting the criteria discussed above and which also accommodates the inclusion in the assembly of an integral caliper end plate structure.
- the entire brake caliper structural framework as an integrated casting assembly which offers the structural and economic features discussed above without the related technical shortcomings of previous proposals as discussed above. We have discovered that significant benefits in the area of cost effective structural strength in relation to weight and assembly factors can be achieved where the entire caliper structure is formed as an integrated casting.
- Such an arrangement has, we have discovered, particular merit in terms of transmitting the braking load around the structure of the disc's (or discs') periphery.
- Such an arrangement provides in a critical design area a structure well adapted to provide a cost-effective load transmission route around and into the relevant structures, offering the necessary reserve strength in an overload situation, and yet using accessible techniques.
- Figure 1 shows in block diagram format a spot-type automotive disc brake comprising a pair of axially slidable discs and associated friction elements, an actuating mechanism therefor and a fixed caliper or bridge structure overlying same ;
- Figure 2 shows an exploded perspective view of a disc brake generally of the same kind as that illustrated in Fig 1 but employing the non-integrated multi-piece mode of caliper construction, from which the present invention takes its starting point.
- a spot-type automotive disc brake 10 comprises a pair of rotatable brake discs 12, 14, a rotatable mounting 16 for the brake discs to permit rotation of the discs and which is adapted to drive the brake discs and have exerted thereon the braking effect by the discs when the disc brake 10 is actuated.
- Central friction element 20 is double-sided for frictional engagement with the mutually-inwardly facing braking surfaces 24, 26 of brake discs 12, 14 and is provided with appropriately facing friction pad material accordingly (as shown in Fig 2 at 108, 110, 112) in each case a generally flat metal backing plate and secured thereto and standing proud thereof a body of friction material of known construction for high durability frictional engagement with the relevant braking surface of the relevant brake disc.
- the friction material is provided at both faces of the backing plate .
- Brake discs 12, 14 are axially slidable in use with respect to their rotatable mounting 16 under the action of friction elements 18, 20, 22 and the actuation means (to be described below) therefor during braking.
- the brake discs may be keyed to the rotatable mounting or hub 16 at three or more locations and resilient means may act there between.
- GB 0010810.0 our reference P54615GB
- a fixed non-rotatable mounting 32 for friction elements 18, 20,22 comprising a caliper or bridge structure 34 which is mounted on a fixed structure of the vehicle to be braked, for example on the wheel mounting and which straddles the brake discs 12, 14 and also provides a mounting for actuation means 36,38 (indicated diagrammatically) which applies inwardly directed braking forces to the outer friction elements 18, 22, thereby causing frictional engagement with the brake discs 12, 14 and slight sliding movement of those discs with respect to their rotatable mounting 16.
- the actuation means 36, 38 comprises a piston and cylinder assembly (not seen in Fig 1) .
- the actuation means is one-sided with a fixed structure at one side of caliper 34 and of the assembly of discs and friction elements (which fixed structure comprises a stop plate extending from caliper 34) , and against which fixed structure the assembly is pushed by the single actuation means. Further details in this regard may be found in our co-pending applications GB9928162.8 (our reference P54532GB) and GB9926022.6 our reference P54534GB)
- Caliper 34 providing a fixed and non-rotatable mounting 32 for the friction elements 18 to 22 is adapted permit sliding movement of the friction elements into and out of frictional engagement with the brake discs while resisting rotational movement of the friction elements under the action of frictional forces generated by engagement of the friction elements with the discs 12, 14.
- a spot-type automotive disc brake 100 comprises a pair of rotatable brake discs 102, 104 and a rotatable mounting 106 for the brake discs to permit such rotation, the mounting being adapted to drive the brake discs and have inserted thereon a braking effect by the brake discs when the disc brake 100 is actuated.
- Mounting 106 is in the form of a hub member of generally drum-like form.
- Friction elements 108, 110, 112 are provided and adapted to frictionally engage braking surfaces 114 on opposite sides of the brake discs to effect braking on actuation of actuation means 116 therefor.
- Brake discs 102, 104 are axially slidable in use with respect to mounting 106 under the action of friction elements 108, 110, 112 and under the action of said actuation means 116 during braking.
- a non-rotatable mounting 118 comprising a caliper 120 for the friction elements 108, 110, 112 is provided and adapted to permit sliding movement of the friction elements into and out of frictional engagement with disc 102, 104 while resisting movement of the friction elements under the action of frictional forces generated by engagement of the friction elements with the discs.
- a three-limbed leaf spring 111 and associated mounting bolt 113 spring-loads the friction elements from above to provide dynamic control and anti-tilt functions under the conditions of use.
- Caliper 120 comprises a caliper bridge portion 122 or mid-portion adapted to extend across a periphery of the discs 102, 104 and two caliper lateral portions 124, 126 adapted to be located one at each lateral side of the assembly of discs 102, 104.
- the rotatable mounting 106 for brake discs 102, 104 comprises a wheel bearing 128 for a wheel (not shown) of an automotive vehicle, the wheel bearing 128 being mounted on a non-rotatable support structure 130 connected at one side of the assembly of discs 102, 104 to one (124) of the lateral portions 124, 126 of the non-rotatable caliper 120.
- the non-rotatable support structure 130 also serves to mount, at the same side of discs 102, 104 the actuation means 132 for the brake, which actuation means comprises twin piston and cylinder assemblies 134, 136.
- Brake discs 102, 104 are axially slidable in use with respect to mounting 106 by virtue of sliding engagement of inwardly projecting drive elements 138 which slidably and drivably engage in corresponding drive channels 140 formed in rotatable mounting 106.
- Caliper 120 has caliper bridge portion 122 forming spaced mounting elements 142 for the friction elements 108, 110, 122, the spacing of the mounting elements 142 permitting the friction elements to be located by insertion into their working positions through the space between the mounting elements so as to be supported thereon and this being done without removing the brake discs .
- non-rotatable support structure 130 comprises a substantial wheel-mounting casting 144 having a steering arm 146
- inboard caliper lateral portion 124 is formed integrally with the cylinders of the piston and cylinder assemblies 134, 136 and thus with the casting of rotatable support structure 130, as seen in the brake construction shown in Fig 2.
- caliper bridge portion 122 and caliper lateral portions 124, 126 comprise an integrated structure formed as a casting so as to be adapted to transmit braking loads directly into the inboard caliper lateral portion 124 which is mounted on the non-rotatable support structure 130 which also mounts the piston and cylinder assemblies 134, 136.
- this integrated structure has been shown by the indication at 32 and 34 of a one-piece structure with no divisions between the caliper lateral portions 124, 126 and the bridge portion 122.
- Fig 2 So far as the detailed embodiment of Fig 2 is concerned, the adaptation of the multi-piece caliper construction to the integrated casting format of the Fig 1 showing of an embodiment of the invention requires that the caliper bolts and their threaded bores and the associated tubular mounting elements 144 be subsumed into a cast format.
- This change is indicated in Fig 2 by the construction lines 150, 152 indicating the integral collection of the caliper bridge portions 122 with the caliper lateral portions 124, 126 in accordance with the teaching of the invention.
- This cast structure is constructed (metallurgically) so that so as to have a strength element comparable to that which has been provided in previous multi-piece constructions by the use of suitable bolt-format tensile members (not shown) .
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Braking Arrangements (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02708478A EP1373750B2 (en) | 2001-03-27 | 2002-03-27 | Disc brake |
BRPI0207252A BRPI0207252A2 (en) | 2001-03-27 | 2002-03-27 | method for building a gauge on a point type automotive disc brake, and, point type automotive disc brake |
US10/472,794 US20040108174A1 (en) | 2001-03-27 | 2002-03-27 | Method and apparatus for disc brake construction |
DE60213220T DE60213220T3 (en) | 2001-03-27 | 2002-03-27 | disc brake |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0107617.3 | 2001-03-27 | ||
GB0107617A GB0107617D0 (en) | 2001-03-27 | 2001-03-27 | Method and apparatus for brake disc construction |
GB0115909A GB0115909D0 (en) | 2001-03-27 | 2001-06-29 | Method and apparatus for disc brake construction |
GB0115909.4 | 2001-06-29 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2002077483A1 true WO2002077483A1 (en) | 2002-10-03 |
WO2002077483A8 WO2002077483A8 (en) | 2002-12-05 |
Family
ID=26245899
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB2002/001191 WO2002077483A1 (en) | 2001-03-27 | 2002-03-27 | Method and apparatus for disc brake construction |
Country Status (4)
Country | Link |
---|---|
US (1) | US20040108174A1 (en) |
EP (1) | EP1373750B2 (en) |
DE (1) | DE60213220T3 (en) |
WO (1) | WO2002077483A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113821957A (en) * | 2021-09-28 | 2021-12-21 | 中国船舶重工集团海装风电股份有限公司 | Brake caliper modeling method for wind turbine generator main frame calculation |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3753760B1 (en) * | 2019-06-21 | 2021-08-04 | C.R.F. Società Consortile per Azioni | Suspension device of a motor-vehicle wheel |
WO2021207009A1 (en) * | 2020-04-05 | 2021-10-14 | Duplicent, Llc | Expanding rotor brake |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3780834A (en) * | 1973-01-15 | 1973-12-25 | Gen Motors Corp | Disc brake assembly |
US3788429A (en) * | 1972-07-14 | 1974-01-29 | Gmc Co | Disc brake and wheel assembly |
GB1519599A (en) | 1974-09-18 | 1978-08-02 | Sony Corp | Electrodeposition methods |
GB2057076A (en) | 1979-08-24 | 1981-03-25 | Teves Gmbh Alfred | Floating caliper disc brake in particular for automotive vehicles |
GB2184801A (en) * | 1985-12-30 | 1987-07-01 | Automotive Products Plc | Disc brakes |
WO1994025771A1 (en) | 1993-04-30 | 1994-11-10 | Itt Automotive Europe Gmbh | Steering knuckle arrangement for motor vehicles |
GB2346940A (en) | 1999-01-13 | 2000-08-23 | Federal Mogul Technology Ltd | A disc brake and hub support including integral pad guide |
EP1069332A2 (en) * | 1999-07-15 | 2001-01-17 | Sumitomo Electric Industries, Ltd. | Disk brake with improved caliper |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2549179B1 (en) * | 1983-07-13 | 1989-02-24 | Dba | DISC BRAKE WITH REMOVABLE CALIPER REINFORCEMENT ARM |
US4529067A (en) * | 1983-08-31 | 1985-07-16 | Rockwell International Corporation | Multiple disc brake |
CA1324324C (en) * | 1988-09-14 | 1993-11-16 | Nui Wang | Disc brake caliper |
GB9120369D0 (en) * | 1991-09-25 | 1991-11-06 | Alcon Components Ltd | Brake caliper |
US6223863B1 (en) * | 1996-12-12 | 2001-05-01 | Federal-Mogul Technology Limited | Disc brake suspension for improved turning circle |
DE19804426C2 (en) † | 1997-12-16 | 2000-06-08 | Porsche Ag | Braking device |
SE0002316D0 (en) † | 2000-06-21 | 2000-06-21 | Haldex Brake Prod Ab | Disc brake |
-
2002
- 2002-03-27 EP EP02708478A patent/EP1373750B2/en not_active Expired - Fee Related
- 2002-03-27 WO PCT/GB2002/001191 patent/WO2002077483A1/en active IP Right Grant
- 2002-03-27 US US10/472,794 patent/US20040108174A1/en not_active Abandoned
- 2002-03-27 DE DE60213220T patent/DE60213220T3/en not_active Expired - Lifetime
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3788429A (en) * | 1972-07-14 | 1974-01-29 | Gmc Co | Disc brake and wheel assembly |
US3780834A (en) * | 1973-01-15 | 1973-12-25 | Gen Motors Corp | Disc brake assembly |
GB1519599A (en) | 1974-09-18 | 1978-08-02 | Sony Corp | Electrodeposition methods |
GB2057076A (en) | 1979-08-24 | 1981-03-25 | Teves Gmbh Alfred | Floating caliper disc brake in particular for automotive vehicles |
GB2184801A (en) * | 1985-12-30 | 1987-07-01 | Automotive Products Plc | Disc brakes |
WO1994025771A1 (en) | 1993-04-30 | 1994-11-10 | Itt Automotive Europe Gmbh | Steering knuckle arrangement for motor vehicles |
GB2346940A (en) | 1999-01-13 | 2000-08-23 | Federal Mogul Technology Ltd | A disc brake and hub support including integral pad guide |
EP1069332A2 (en) * | 1999-07-15 | 2001-01-17 | Sumitomo Electric Industries, Ltd. | Disk brake with improved caliper |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113821957A (en) * | 2021-09-28 | 2021-12-21 | 中国船舶重工集团海装风电股份有限公司 | Brake caliper modeling method for wind turbine generator main frame calculation |
CN113821957B (en) * | 2021-09-28 | 2024-03-01 | 中国船舶重工集团海装风电股份有限公司 | Brake caliper modeling method for wind turbine main frame calculation |
Also Published As
Publication number | Publication date |
---|---|
DE60213220T3 (en) | 2012-02-09 |
US20040108174A1 (en) | 2004-06-10 |
EP1373750B2 (en) | 2011-03-16 |
EP1373750B1 (en) | 2006-07-19 |
DE60213220T2 (en) | 2007-07-12 |
EP1373750A1 (en) | 2004-01-02 |
WO2002077483A8 (en) | 2002-12-05 |
DE60213220D1 (en) | 2006-08-31 |
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