GB2024348A - Disc brake - Google Patents
Disc brake Download PDFInfo
- Publication number
- GB2024348A GB2024348A GB7921795A GB7921795A GB2024348A GB 2024348 A GB2024348 A GB 2024348A GB 7921795 A GB7921795 A GB 7921795A GB 7921795 A GB7921795 A GB 7921795A GB 2024348 A GB2024348 A GB 2024348A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pad assembly
- control arm
- arm means
- face
- disc
- 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- Withdrawn
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
- 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
- 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
- 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
- F16D65/0975—Springs made from wire
- F16D65/0976—Springs made from wire acting on one pad only
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
Control arm means (11) of a slidable caliper (9) contacts with an outboard pad assembly (16,41) to urge it towards a brake disc (30)-the control arm means (11) has an inner surface in juxtaposed relationship to a co-operable face on the pad assembly (16,41) and this surface and face are inclined to each other at an angle ( alpha ) to establish a fulcrum at an area near the leading end portion (11a) of the control arm means (11). With this construction, a disc brake is provided wherein load distribution of the outboard pad assembly is generally uniform. The co-operable face may be parallel to the plane of the disc and the surface inclined thereto (Figure 5) or vice versa (Figure 7). The control arm means (11) may include a wedge member formed with the surface (Figure 6). Both the outboard pad assembly (16,41) and the inboard pad assembly (15,40) slide along rails on a carrier (1) carrying the caliper (9) and both pad assemblies carry springs (17) on stub axles projecting from the backing plates (41,40). <IMAGE>
Description
SPECIFICATION
Disc brake
The present invention relates to a disc brake, and more particularly to a Colette type disc brake.
A disc brake, using a Colette caliper, is known which includes a carrier, an inboard pad assembly arranged adjacent a brake disc, an outboard pad assembly arranged adjacent the disc, wherein the caliper includes a control arm means for urging the outboard pad assembly toward the disc and a hydraulic device having a piston for urging the inboard pad assembly toward the disc for clamping the disc between these pad assemblies during braking.
A problem encountered in this type disc brake was that an outboard pad wears at a faster rate at the upper part thereof, requiring frequent replacement of the pad.
According to the present invention, there is provided a disc brake for a disc rotatable within a plane about an axis, comprising: a carrier; a caliper mounted on the carrier for slidable movement along the axis; an inboard pad assembly arranged adjacent an inboard side of the disc; an outboard pad assembly arranged adjacent an outboard side of the disc; the caliper including a hydraulic device having a piston arranged to urge the inboard pad assembly toward the disc, and the caliper including control arm means arranged to urge the outboard pad assembly toward the disc, wherein the control arm means extends to face part of the outboard pad assembly; the control arm means having an inner surface and the outboard pad assembly having a cooperable face in juxtaposed relationship to the inner surface; and the inner surface of the control arm means and the cooperable face of the outboard pad assembly being inclined to each other to establish a fulcrum at an area near the leading end of the control arm means.
In the accompanying drawings:
Fig. 1 is a plan view of a conventional disc brake, using a Colette caliper, partly broken away to show a sliding arrangement for the caliper and to show the pad assemblies;
Fig. 2 is a section through the line ll-ll in Fig. 1, showing the constructional feature of the conventional disc brake;
Fig. 3 is a section through the line Ill-Ill in Fig. 2;
Fig 4 is a diagram showing the load distribution on the outboard pad of the conventional disc brake; and
Figs. 5 to 7 are sectional views similar to that of
Fig. 2 showing various embodiments according to the present invention.
Explaining the conventional Colette caliper type disc brake, in connection with Figs. 1 to 3, the reference numeral 1 indicates a stationary member or a carrier adapted to be fixedly mounted, in use, to a vehicle body (not shown). The stationary member 1 is formed with a running way or slot 2 for receiving the peripheral portion of a rotatable brake disc 30,
shown in phantom. Also formed in the stationary
member 1 are mounting support portions 3 and 4
formed with guide bores 5 and 6, respectively, for
accommodating slide pins 12 and 13 of a Colette caliper 9, respectively.
The caliper 9 includes a hydraulic device 10 and control arm means 11 for clamping the disc 30 with the inboard 15, 40 and the outboard pad assemblies 16, 41. The caliper 9 is formed with a cylinder and a piston 18 is received in the cylinder, the cylinder and the piston being component parts of the hydraulic device 10.
The sliding arrangement of the caliper 9 relative to the stationary member or carrier 1 is as follows: The slide pins 12 and 13 are fixed to the caliper 9 by bolts 14Aand 14B, respectively, and slidably received by the guide bores 5 and 6 so that the caliper is slidable in an direction perpendicular to the opposite sides of the disc 30 or an axis of rotation of the disc.
As best seen in Fig. 3, the inboard pad assembly including the inboard pad 15 and its backing plate 40 is slidable in a direction perpendicular to the plane of
Fig. 3 along a rail 7 formed on the carrier 1. The backing plate 40 has shoulders formed on the lateral sides thereof to follow the rail 7. A spring 17 winding through a stub axle projecting from the backing plate 40 has its opposite ends bearing against the adjacent surfaces of the caliper 9 so as to resiliently hold the inboard pad assembly 15, 40 in position.In a similar manner, the outboard pad assembly including the outboard pad 16 and its backing plate 41 is held in position by the sliding engagement of the shoulder portions of the backing plate 41 with the rail 8 and the spring 17 winding around a stub axle projecting from the backing plate 41 with its opposite ends bearing against the adjacent surfaces of the caliper 9.
In Fig. 1, the reference numerals 19 designate dust covers, respectively, each arranged to seal between each slide pin and the carrier 1. The reference numeral 20 designates a dust boot for sealing clearance between the piston 18 and the cylinder.
The operation of the disc brake of this construction is as follows: When, upon braking, the hydraulic device 10 is energized by pressurizing the cylinder thus urging the piston 18 to extend out of the cylinder so as to urge the inboard pad assembly 15, 40 into pressing engagement with the inboard side of the disc 30. Due to the reaction force created the caliper 9 moves, relative to the carrier 1, in a rightward direction, viewing in Figs. 1 and 2, thus causing the control arm means 11 to urge the outboard pad assembly 16, 41, into pressing engagement with the outboard side of the disc 30. In this manner, the disc 30 is clamped by the inboard and outboard pads 15 and 16.
Referring particularly to Figs. 2 to 4, the constructional feature of the conventional disc brake will be described.
The control arm means 11 has an inner suface adapted to mate with the outside face of the backing plate 41 of the outboard pad assembly. This surface and face are parallel to each other for the purpose of
maintaining mating contact with each other during
braking. However, in practice due to bending, the
inner surface of the control arm means 11 and the face establish a fulcrum near the root portion 11 b of the control arm means 11 rather than the leading
end portion 11a.
This tendency increases if, for the purpose of
reducing the weight of the disc brake, the control
arm means 11 is designed to extend downwardly to face only the upper part of the backing plate 41 as shown in Fig. 2.
For the above reason, it is a problem that the load is heaviiy applied to the upper portion of the outboard pad of the disc brake, causing the upper portion of this pad to wear at a faster rate. This leads to a shortening of the service life of the outboard pad and frequent replacement of a pad is required.
An object of the present invention is therefore to provide a disc brake free of the above problem and which is of lightweight construction.
Referring to the first preferred embodiment shown in Fig. 5, only a feature over the conventional disc brake described in the preceding in connection with
Figs. 1 to 3 will be described.
As shown in Fig. 5, control arm means 11 extends downwardly to face the upper part of an outer side of a pad backing plate 41 of an outboard pad assembly 16, 41. The control arm means 11 has an inner surface formed thereon and the backing plate 41 a cooperable face on the outer side thereof. The cooperable face of the backing plate 41 extends parallel to a plane within which a brake disc 30 is rotatable about an axis, and the inner surface of the control arm means 11 is inclined to the cooperable face through a predetermined angle a and extends upwardly outwardly away from the cooperable face of the backing plate 41. This surface and face establish a fulcrum, during braking, atan area nearthe leading end portion 1 la of the control arm means 11.
It will be noted that a fulcrum has been displaced toward an inward area of the pad of the outboard pad assembly 16, 41 according to the construction and arrangement of the present invention. As a result, the load distribution of the outboard pad has become uniform, at least less locallized.
Although in the Fig. 5 embodiment, the inner surface is formed on an integral portion of the caliper 9, it is possible to obtain the same effect by using the construction shown in the second embodiment in
Fig. 6.
According to the second embodiment, the integral portion of the control arm means 11 is formed with an inner surface 1 1d which extends parallel to the face of the backing plate 41. This surface, however, is not adapted for contact with the face of the backing plate 41. The control arm means 11 also includes a wedge member 11 c secured to the surface 11 c. This wedge member is formed with the inclined surface with which the face of the backing plate 41 cooperates to establish a fulcrum.
Fig. 7 illustrates an alternative embodiment to the
Fig. 5 embodiment, wherein the inner surface of the control arm means 11 extends parallel to the plane along which the disc 30 is rotatable and the cooperable face of the backing plate 41 is inclined to this
inner surface of the control arm means through the
predetermined angle a and extends upwardly and
inwardly away from this inner surface. The same
effect is obtained with this construction and
arrangement.
The predetermined angle a is determined by taking into consideration a preferred region on an outboard pad where the stress is to be applied.
Claims (5)
1. A disc brake for a disc rotatable within a plane about an axis, comprising:
a carrier;
a caliper mounted on said carrier for slidable movement along the axis;
an inboard pad assembly arranged adjacent an inboard side of the disc;
an outboard pad assembly arranged adjacent an outboard side of the disc;
said caliper including a hydraulic device having a piston arranged to urge said inboard pad assembly toward the disc, and
said caliper including control arm means arranged to urge said outboard pad assembly toward the disc,
wherein
said control arm means extends to face part of said outboard pad assembly;
said control arm means having an inner surface and said outboard pad assembly having a cooperable face in juxtaposed relationship to said inner surface; and
said inner surface of said control arm means and said cooperable face of said outboard pad assembly being inclined to each other to establish a fulcrum at an area near the leading end of said control arm means.
2. A disc brake as claimed in Claim 1, wherein
said control arm means extends downwardly, and
said outboard pad assembly includes a pad backing plate formed with said cooperable face,
and wherein
said cooperable face is parallel to the plane, and
said inner surface is inclined to the plane through a predetermined angle and extends upwardly and outwardly away from said cooperable face.
3. A disc brake as claimed in Claim 2, wherein
said control arm means includes an integral portion formed with a surface which extends parallel to the plane and includes a wedge member secured to said surface with which said integral portion is formed, said wedge member being formed with said inner surface.
4. A disc brake as claimed in Claim 1, wherein
said control arm means extends downwardly, and
said outboard pad assembly includes a pad backing plate formed with said cooperable face, and wherein
said inner surface is parallel to the plane,
said cooperable face is inclined to the plane through a predetermined angle and extends upwardly and inwardly away from said inner surface.
5. A disc brake constructed and arranged substantially as described herein with reference to Fig 5, or Fig 6, or Fig 7 of the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8965978U JPS557464U (en) | 1978-06-28 | 1978-06-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB2024348A true GB2024348A (en) | 1980-01-09 |
Family
ID=13976876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7921795A Withdrawn GB2024348A (en) | 1978-06-28 | 1979-06-22 | Disc brake |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS557464U (en) |
| DE (1) | DE2925785A1 (en) |
| FR (1) | FR2429934A1 (en) |
| GB (1) | GB2024348A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994029611A2 (en) * | 1993-06-05 | 1994-12-22 | Itt Automotive Europe Gmbh | Floating caliper disc brake for motor vehicles |
| DE102005023116A1 (en) * | 2005-05-19 | 2006-11-23 | Wabco Radbremsen Gmbh | disc brake |
| FR3031152A1 (en) * | 2014-12-31 | 2016-07-01 | Foundation Brakes France | METHOD OF REDUCING LOW FREQUENCY NOISE IN A DISC BRAKE, AND CORRESPONDING CALIPER LINK OR HOUSING |
| US9476468B2 (en) | 2011-09-28 | 2016-10-25 | Knorr-Bremse Systeme Fuer Nutzfahrzeuge Gmbh | Disc brake and brake pad for a disc brake |
| EP3812606A4 (en) * | 2018-06-20 | 2022-07-27 | Hitachi Astemo, Ltd. | Disc brake and caliper |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19653488C2 (en) * | 1996-12-20 | 2002-02-14 | Knorr Bremse Systeme | disc brake |
| DE102015108304B4 (en) * | 2015-05-27 | 2018-11-29 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Disc brake, and combination of a brake pad set of a disc brake and a pressure plate |
| DE102021200412A1 (en) | 2021-01-18 | 2022-07-21 | Continental Teves Ag & Co. Ohg | Friction lining with tilting bearing for improved cooperation |
| JP2023090195A (en) * | 2021-12-17 | 2023-06-29 | 曙ブレーキ工業株式会社 | Floating type disc brake device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3659681A (en) * | 1970-04-16 | 1972-05-02 | Allis Chalmers Mfg Co | Lever actuated disk brake |
-
1978
- 1978-06-28 JP JP8965978U patent/JPS557464U/ja active Pending
-
1979
- 1979-06-22 GB GB7921795A patent/GB2024348A/en not_active Withdrawn
- 1979-06-26 DE DE19792925785 patent/DE2925785A1/en not_active Ceased
- 1979-06-27 FR FR7916579A patent/FR2429934A1/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994029611A2 (en) * | 1993-06-05 | 1994-12-22 | Itt Automotive Europe Gmbh | Floating caliper disc brake for motor vehicles |
| WO1994029611A3 (en) * | 1993-06-05 | 1995-02-09 | Teves Gmbh Alfred | Floating caliper disc brake for motor vehicles |
| DE102005023116A1 (en) * | 2005-05-19 | 2006-11-23 | Wabco Radbremsen Gmbh | disc brake |
| US9476468B2 (en) | 2011-09-28 | 2016-10-25 | Knorr-Bremse Systeme Fuer Nutzfahrzeuge Gmbh | Disc brake and brake pad for a disc brake |
| FR3031152A1 (en) * | 2014-12-31 | 2016-07-01 | Foundation Brakes France | METHOD OF REDUCING LOW FREQUENCY NOISE IN A DISC BRAKE, AND CORRESPONDING CALIPER LINK OR HOUSING |
| EP3812606A4 (en) * | 2018-06-20 | 2022-07-27 | Hitachi Astemo, Ltd. | Disc brake and caliper |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS557464U (en) | 1980-01-18 |
| FR2429934A1 (en) | 1980-01-25 |
| DE2925785A1 (en) | 1980-01-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |