GB2132293A - Sliding caliper disc brake - Google Patents
Sliding caliper disc brake Download PDFInfo
- Publication number
- GB2132293A GB2132293A GB08333266A GB8333266A GB2132293A GB 2132293 A GB2132293 A GB 2132293A GB 08333266 A GB08333266 A GB 08333266A GB 8333266 A GB8333266 A GB 8333266A GB 2132293 A GB2132293 A GB 2132293A
- Authority
- GB
- United Kingdom
- Prior art keywords
- caliper
- pad
- disc
- brake
- carrier
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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
- 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
Abstract
The brake has a fixed carrier (1) carrying directly and indirectly actuated pads (4, 5) and a caliper (7) slidably mounted by at least one pin (8) and including actuators (11); the indirectly actuated pad (5) and caliper (7) are provided with interengaging formations of which the mating surfaces lie in planes perpendicular to the longitudinal axis of the pin(s) and are arranged to provide additional support for the caliper. As shown, the interengaging formations are in the form of a rib (15) on backing plate (6) of pad (5) and a recess (16) in a caliper portion (7B)- there may be a plurality of ribs and corresponding grooves. An opening (20) of caliper (7) allow removal of pad (5) radially of the disc (2) after first removing pins (17). <IMAGE>
Description
SPECIFICATION
Sliding caliper disk brake
This invention relates to a sliding caliper disc brake, primarily for use in motor vehicles.
The invention is particularly concerned with a disc brake having a carrier mountable on a vehicle in a fixed position straddling a rotatable brake disc carried by a member to be braked, a pair of brake pads mounted on the carrier respectively at either side of the disc, and a caliper mounted on the carrier by way of at least one pin for sliding movement relative to the carrier in a direction parallel to the axis of rotation of the disc and also straddling the disc, the caliper including actuating means for directly urging one of said pads into braking engagement with the disc, thereby indirectly actuating the other of said pads by causing the caliper to slide relative to the carrier and urge said other pad into braking engagement with the disc.
In disc brakes of this general type, a part of the caliper which straddles the disc is often unsupported and therefore subject to vibrations occurring, in normal use, in a vehicle to which the brake is fitted. This can be acceptable in small brakes designed for use in cars for example, but with heavier duty brakes used in commercial vehicles, the weight of the unsupported caliper part is such that the aforesaid vibrations in use can lead to bending of the or each support pin which hinders proper sliding of the caliper, or may even lead to pin breakage in extreme cases.
An object of the invention is to provide a sliding caliper disc brake in which this difficultly is minimised or avoided.
According to the present invention, in a sliding caliper disc brake of the aforesaid general type, the indirectly actuated pad and caliper are provided with interengaging formations of which the mating surfaces lie in planes perpendicular to the longitudinal axes of the pins and are arranged to provide additional support for the caliper.
It is desirable with heavy duty brakes to be able to withdrawn the pads radially from the caliper in order to avoid displacing the relatively heavy caliper relative to the carrier. To this end, the caliper may be provided with an access opening in an outer wall thereof and said surfaces may then advantageously be arranged to permit radial withdrawal of the pad from the carrier through said caliper mvening without effecting displacement of the caliper relative to the carrier.
In one convenient practical arrangement, the interengaging formations are in the form of a rib on the backing plate of the indirectly actuated pad and a complementary groove in the caliper. The rib is conveniently disposed generally centrally of the pad in the widthwise direction thereof.
The invention will now be described, by way of example, with reference to the accompanying drawings, in which: Figure 1 is a plan view, partly in cross-section, of one form of the sliding caliper disc brake of the invention;
Figure 2 is a perspective view of one form- of brake pad for use in the disc brake of Figure 1, and
Figure 3 illustrates diagrammatically one possible arrangement of the disc brake, in use, in relation to a brake disc.
Referring go Figure 1 of the drawings, the sliding caliper disc brake illustrated therein includes a carrier 1 which is provided with means such as lugs (not shown) through which bolts may be passed in order to secure the carrier in position on a fixed part of a vehicle adjacent to a brake disc 2. The carrier includes a bridge portion which is not visible in the drawing but which straddles the periphery of the disc and is connected to side portions in which are formed recesses containing brake pads 3 and 4 disposed respectively at either side of the disc. Each pad includes a layer 5 of friction material which is bonded or otherwise secured to a metal backing plate 6. Braking drag is transferred from the pads to the carrier in conventional manner.
The disc brake also includes a caliper 7 slideably mounted on the carrier for movement in a direction parallel to the rotary axis of the disc by means of a pair of pins 8 and 9, threaded ends 10 of which are received in threaded holes of the carrier, whilst the greater part of the remainder of the pin lengths are received in through bores 1 0A of the caliper and provide support surfaces along which the caliper may slide as aforesaid. The open ends of the bores are closed by plugs 1 OB (only one bore 1 0A and plug 1 OB) being shown in this drawing). It would alternatively be possible to
secure the pin ends within the caliper and insert the supporting portions of the pins within correspondig bores of the carrier. Sealing is effected between the sliding caliper 7 and the fixed carrier 1 by means of respective convoluted boots 8A, 9A, surrounding the exposed portions of the pins.
In the embodiment described the portion of the caliper within which the pins 8 and 9 are slideably
received contains a pair of hydraulic actuators, indicated generally as 1 , the pistons 12 of which bear directly on the backing plate 6 of the adjacent pad and will urge this pad directly into braking engagement with the disc 2 upon
introduction of hydraulic fluid into the actuators.
The caliper has arms 7A embracing the disc
periphery and connected to portions 7B of the caliper which extend parallel to the plane of the disc and abut the backing plate 6 of the other brake pad. Actuation of the pad 4 produces a
reaction causing the caliper to slide on the pins 8
and 9 so that the pad 5 is applied against the disc
by movement of the adjacent caliper portion 7B.
The arms 7A project by a considerable distance
beyond the bearing surfaces of the pins 8 and 9, so that these arms and the portions 7B are
relatively unsupported and subject to the effects of vibration arising on the brake during normal
use. In a heavy duty brake for commercial use, the
unsupported part of the brake can be of
considerable weight and the effect of the aforesaid vibration can be sufficient to deform the pins 8 and 9, thereby preventing proper sliding of the caliper thereon, or to cause pin breakage in extreme cases. In order to provide additional support for the overhanging parts of the caliper, the backing plate 6 of the indirectly actuated pad has a rib 1 5 formed thereon (Figure 2) extending perpendicularly to the longitudinal axis of the pins 8 and 9.The rib 1 5 is received within a complementary recess 1 6 formed in an adjacent surface of the caliper portion 7B so that the sides
1 5A of the rib closely engage adjacent opposed surfaces of the recess 16.
This arransernent is adopted when the brake B is disposed at a location on the periphery of the disc away from the uppermost point of the disc periphery, as illustrated in igure 3. With this disposition, the pins 8 and 9 are disposed in a generally vertical plane and vertical vibrations sustained by the unsupported caliper portions are reacted by one or both of the rib surfaces 1 5A.
This effectively minimises risk of deformation or
breakage of the pins 8 and 9 and it will be seen that the ribs also permit sliding of the pad 5 in a directon radially of the disc so that the pad may be removed through an adjacent opening 20 of the caliper without the necessity of displacing the caliper relative to the carrier. Such pad removal would be effected by first removing conventional retaining pins 1 7 extending through the caliper and across said opening.
It is possible to provide a plurality of ribs and corresponding grooves for each pad, although a single rib will suffice in many cases.
It will be seen that the invention provides a simple cheap and convenient means of resisting vibrational forces arising on a relatively unsupported part of the caliper, it being relatively
easy to form the ribs 15 by part shearing of the
pad backing plate 6. It will be seen that the pads
can conveniently be non-handed, the rub 1 5 on
the directly actuated pad being conveniently
housed between the actuators 12.
Claims (9)
1. A sliding caliper disc brake comprising a carrier mountable on a vehicle in a fixed position
straddling a rotatable brake disc carried by a
member to be braked, a pair of brake pads
mounted on the carrier respectively at either side of the disc, and a caliper mounted on the carrier by way of at least one pin for sliding movement relative to the carrier in a direction parallel to the axis of rotation of the disc and also straddling the disc, the caliper including actuating means for directly urging one of said pads into braking engagement with the disc, thereby indirectly actuating the other of said pads by causing the caliper to slide relative to the carrier and urge said other pad into braking engagement with the disc, and the indirectly actuated pad and caliper being provided with interengaging formations of which the mating surfaces lie in planes perpendicular to the longitudinal axes of the pins and are arranged to provide additional suppcrt for the caliper.
2. A brake according to Claim 1 wherein the caliper is provided with an access opening in an outer wall thereof and said surfaces are arranged to permit radial withdrawal of the pad from the carrier through said caliper opening without effecting displacement of the caliper relative to the carrier.
3. A brake according to Claim 1 or Claim 2 wherein the interengaging formations are in the form of a rib of the indirectly actuated pad and a complementary groove in the caliper.
4. A brake according to Claim 3 wherein the rib is disposed generally centrally of the pad in the widthwise direction thereof.
5. A brake according to any one of the preceding claims wherein each pad includes a backing plate carrying a lining of friction material and the formation on the indirectly actuated pad is on the backing plate thereof.
6. A brake according to any one of the preceding claims wherein the formations are of generally rectangular cross-section.
7. A sliding caliper disc brake substantially as hereinbefore described, with reference to Figures 1 and 2 of the accompanying drawings.
8. A brake pad for use in a disc brake according to any one of the preceding claims, and having a formation thereon adapted for engagement with a corresponding formation of the caliper of the disc brake, whereby the pad when so engaged in use, affords additional support for the caliper, whilst permitting radial withdrawal of the pad from the disc brake.
9. A brake pad for use with a disc brake according to any one of Claims 1 to 7 and being substantially as hereinbefore described with reference to Figure 2 of the accompanying drawings.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB08333266A GB2132293B (en) | 1982-12-24 | 1983-12-13 | Sliding caliper disc brake |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8236747 | 1982-12-24 | ||
GB08333266A GB2132293B (en) | 1982-12-24 | 1983-12-13 | Sliding caliper disc brake |
Publications (3)
Publication Number | Publication Date |
---|---|
GB8333266D0 GB8333266D0 (en) | 1984-01-18 |
GB2132293A true GB2132293A (en) | 1984-07-04 |
GB2132293B GB2132293B (en) | 1986-06-04 |
Family
ID=26284777
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB08333266A Expired GB2132293B (en) | 1982-12-24 | 1983-12-13 | Sliding caliper disc brake |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2132293B (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2143916A (en) * | 1983-06-20 | 1985-02-20 | Tokico Ltd | Disc brake |
DE4126339A1 (en) * | 1991-08-09 | 1993-02-11 | Teves Gmbh Alfred | FLOATING SADDLE PARTIAL DISC BRAKE FOR HIGH-PERFORMANCE VEHICLES |
US5388675A (en) * | 1994-06-23 | 1995-02-14 | Westinghouse Air Brake Company | Backing plate for disc brake pad |
US6135244A (en) * | 1996-07-22 | 2000-10-24 | Alliedsignal Materiaux De Friction | Plate device for supporting at least one brake pad for a vehicle disc brake |
GB2370079A (en) * | 2000-12-18 | 2002-06-19 | Federal Mogul Brake Syst Ltd | Disc brake pad support by an axial abutment and channel |
WO2009013007A2 (en) * | 2007-07-25 | 2009-01-29 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Disk brake, in particular for a utility vehicle |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1521038A (en) * | 1974-10-22 | 1978-08-09 | Girling Ltd | Sliding caliper disc brake |
GB1548220A (en) * | 1976-10-20 | 1979-07-04 | Girling Ltd | Disc brakers for vehicles |
GB2012896A (en) * | 1978-01-21 | 1979-08-01 | Girling Ltd | Improvements Relating to Disc Brakes |
GB1561210A (en) * | 1976-06-23 | 1980-02-13 | Toyota Motor Co Ltd | Disc brake assembly for automotive vehicles |
GB1596870A (en) * | 1977-06-16 | 1981-09-03 | Tokico Ltd | Disc brake |
GB2078883A (en) * | 1980-06-26 | 1982-01-13 | Aisin Seiki | Sliding caliper disc brakes |
-
1983
- 1983-12-13 GB GB08333266A patent/GB2132293B/en not_active Expired
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1521038A (en) * | 1974-10-22 | 1978-08-09 | Girling Ltd | Sliding caliper disc brake |
GB1561210A (en) * | 1976-06-23 | 1980-02-13 | Toyota Motor Co Ltd | Disc brake assembly for automotive vehicles |
GB1548220A (en) * | 1976-10-20 | 1979-07-04 | Girling Ltd | Disc brakers for vehicles |
GB1596870A (en) * | 1977-06-16 | 1981-09-03 | Tokico Ltd | Disc brake |
GB2012896A (en) * | 1978-01-21 | 1979-08-01 | Girling Ltd | Improvements Relating to Disc Brakes |
GB2078883A (en) * | 1980-06-26 | 1982-01-13 | Aisin Seiki | Sliding caliper disc brakes |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2143916A (en) * | 1983-06-20 | 1985-02-20 | Tokico Ltd | Disc brake |
DE4126339A1 (en) * | 1991-08-09 | 1993-02-11 | Teves Gmbh Alfred | FLOATING SADDLE PARTIAL DISC BRAKE FOR HIGH-PERFORMANCE VEHICLES |
US5464077A (en) * | 1991-08-09 | 1995-11-07 | Itt Automotive Europe Gmbh | Floating-caliper spot-type disc brake for high-powered vehicles |
DE4126339C2 (en) * | 1991-08-09 | 2002-04-04 | Continental Teves Ag & Co Ohg | Part floating disc brake for high-performance vehicles |
US5388675A (en) * | 1994-06-23 | 1995-02-14 | Westinghouse Air Brake Company | Backing plate for disc brake pad |
US6135244A (en) * | 1996-07-22 | 2000-10-24 | Alliedsignal Materiaux De Friction | Plate device for supporting at least one brake pad for a vehicle disc brake |
GB2370079A (en) * | 2000-12-18 | 2002-06-19 | Federal Mogul Brake Syst Ltd | Disc brake pad support by an axial abutment and channel |
GB2370079B (en) * | 2000-12-18 | 2004-09-29 | Federal Mogul Brake Syst Ltd | Friction element control in disc brakes |
WO2009013007A2 (en) * | 2007-07-25 | 2009-01-29 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Disk brake, in particular for a utility vehicle |
WO2009013007A3 (en) * | 2007-07-25 | 2009-04-02 | Knorr Bremse Systeme | Disk brake, in particular for a utility vehicle |
Also Published As
Publication number | Publication date |
---|---|
GB2132293B (en) | 1986-06-04 |
GB8333266D0 (en) | 1984-01-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19931213 |