GB2046855A - A disc brake for vehicles - Google Patents
A disc brake for vehicles Download PDFInfo
- Publication number
- GB2046855A GB2046855A GB8009718A GB8009718A GB2046855A GB 2046855 A GB2046855 A GB 2046855A GB 8009718 A GB8009718 A GB 8009718A GB 8009718 A GB8009718 A GB 8009718A GB 2046855 A GB2046855 A GB 2046855A
- Authority
- GB
- United Kingdom
- Prior art keywords
- friction pads
- disc
- stationary member
- caliper
- radially
- 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
- 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
- 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
- F16D2055/0004—Parts or details of disc brakes
- F16D2055/0041—Resilient elements interposed directly between the actuating member and the brake support, e.g. anti-rattle springs
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
A vehicle disc brake including a stationary member (1) for securing to a non-rotatable part of the vehicle, a caliper (2) supported on the stationary member (1) to slide in the direction of the axis of a rotable disc, and a pair of friction pads (4, 5) disposed on the opposite sides of the disc and supported on the stationary member to slide in the direction of the axis of the disc has a pad spring (8) which extends between the caliper (2) and the backing plates (4a, 5a) of friction pads (4, 5) for biassing the caliper (2) radially outwards and the friction pads (4, 5) radially inwards with respect to the disc and which also extends between the stationary member (1) and the backing plates (4a, 5a) of the friction pads (4, 5) for biassing the friction pads in the circumferential direction (C) with respect to the disc. <IMAGE>
Description
SPECIFICATION
A disc brake for vehicles
The present invention relates to a disc brake for a motor vehicle.
In particular the present invention relates to a disc brake of the type comprising a stationary member adapted to be secured to a nonrotatable part of a vehicle, a caliper supported on the stationary member to slide in the direction of the axis of a rotatable disc, and a pair of friction pads supported on the stationary member to slide in the direction of the axis of the disc.
In a known disc brake of this type the caliper has an inverted U-shaped configuration with an actuating mechanism such as a hydraulic piston-cylinder device being incorporated in one limb portion to apply one of the friction pads against one surface of the disc.
According to the reaction force acting on the actuating mechanism the caliper moves slidably with respect to the stationary member and the other limb portion of the caliper applies the other friction pad against the other surface of the disc. The sliding movement of the caliper with respect to the stationary member is usually guided by a pair of parallel pins and corresponding guide bores provided between the caliper and the stationary member.
In the known disc brake the opposite circumferential ends of each backing plate of the friction pads are mounted on and guided by circumferentially spaced guide surfaces formed on the stationary member, so that the friction pad can slide on the guide surfaces in the direction of the axis of the disc. There is inevitably provided a clearance between the stationary member and the caliper or the friction pads in the direction transverse to the relative sliding movement therebetween, whereby the sliding movement of the caliper and friction pads with respect to the stationary member will sometimes be impeded and, further, the vibrations of the caliper and the friction pads will sometimes occur in applying the brake.
There has been proposed a pad spring which is disposed between a caliper and friction pads for biassing the caliper in the radially outward direction and the friction pads in the radially inward direction. The pad spring can effectively suppress the vibrations of the caliper and the friction pads in the radial directions with respect to the disc, but the vibrations of friction pads in the circumferential direction of the disc cannot be suppressed. Further, the friction pads are displaced in the direction of the rotation of the disc in applying in the brake and impactively engage with the guide surface of the stationary member to transmit the braking torque, so that the guide surfaces of the stationary member and corresponding end surface of the friction pads will suffer from rust, corrosion, excessive wear or the like thus impairing the braking characteristics.
An aim of the present invention is to solve the problems as heretofore described.
According to the present invention there is provided a disc brake for a vehicle comprising a stationary member for securing to a nonrotatable part of the vehicle, a caliper supported on the stationary member to slide in the direction of the axis of a rotatable disc, a pair of friction pads supported on the stationary member to slide in the direction of the axis of the disc, and a pad spring provided between the stationary member, the caliper, and backing plates of respective friction pads and baissing the caliper in the radially outward direction and the friction pads in the radially inward direction and also in the circumferential direction.
Preferably the pad spring is a one piece leaf spring having a first portion extending between a radially outer surface of each backing plate of the friction pads and the corresponding surface of the caliper to bias the friction pads and the caliper respectively in the inward and outward radial directions, and second portions extending in the radial and axial directions with respect to the stationary member and each backing plate of the friction pads so as to bias the friction pads in the circumferential direction.
The present invention will now be described further, by way of example only, by reference to the accompanying drawings, in which:
Figure 1 is a plan view of one embodiment of a disc brake constructed according to the present invention;
Figure 2 is a front view of the disc brake of
Fig. 1;
Figure 3 is a perspective view of a pad spring incorporated in the disc brake of Fig.
1; and Figure 4 is an enlarged partial sectional view taken along line IV-IV in Fig.
1.
Referring particularly to Figs. 1 and 2, the disc brake comprises a stationary member 1 which is adapted to be secured to a nonrotatable part of a vehicle, a caliper 2 supported slidably on the stationary member 1 by two parallel pins 3 and 3 so as to move in the direction of the axis of a rotatable disc 10 or in the vertical direction as viewed in Fig. 1, and a pair of friction pads 4 and 5. The friction pads 4 and 5, having respectively backing plates 4a and 5a, are mounted slidably on circumferentially (transversely in Fig.
1) spaced arms 1 a and 1 a of the stationary member 1 and move toward and away from the disc 10. The caliper 2 straddles the circumference of the disc 10 and incorporates in one limb portion 2a thereof a cylinder 6 receiving therein a piston 7 for pressing the friction pad 5 against the disc 1 0.
The other limb portion 2b of the caliper 2 contacts the rear surface of the backing plate 4a of the friction pad 4. When the piston 7 moves downward in Fig. 1 to press the friction pad 5 against the disc 10, the caliper 2 is displaced upwardly in Fig. 1 according to the reaction force and the limb portion 2b of the caliper 2 displaces upwardly the friction pad 4 thereby clamping the disc 10 between the friction pads 4 and 5.
According to the invention, a pad spring 8 is mounted between the stationary member 1, the caliper 2 and the backing plates 4a and 5a of the friction pads 4 and 5. As shown in
Figs. 2 and 3, the pad spring 8 includes a ridge portion or bent portion 8a which divides a portion extending between the caliper and the friction pads from a portion extending between the friction pads and the stationary member.The portion extending between the caliper and the friction pads includes a downwardly projecting ridge portion 8e, which engages with the radially outer surfaces of backing plates 4a and 5a of the friction pads 4 and 5, and a generally circumferentially extending tongue portion 8cwhich resiliently engages with a radially inner surface of the caliper 2 for pressing the same in the radially outward direction (the direction A as viewed in Fig. 4). The ridge portion 8e presses the backing plates 4a and 5a in the radially inward direction or the direction B in Fig. 4.
The portion extending between the friction pads and the stationary member 1 includes a generally circumferentially extending tongue portion brand two axially spaced and radially extending tongue portions 8d. The tongue portion 8b extends along a circumferential groove or cut-out 1 b' which is formed in a portion 1 b of the arm portion of the stationary member 1 and engages with an upper end wall of the groove 1 b'. The groove 1 b' is formed to receive freely the circumference of the disc 10, and the upper end wall thereof is depicted by broken lines in Fig. 2 and the opposite side walls thereof are depicted by broken line in Fig. 1.The tongue portion 8b has a cut-out portion 8b' as shown in Fig. 3 so that the tongue portion Bb resiliently engages with the opposite side walls of the goove 1 b'. The tongue portions 8d extend between generally axially and radially extending surfaces 9 of the stationary member 1 and corresponding surface 4a' or 5a' of the backing plate of the friction pad 4 or 5 as shown in Fig. 4 and bias the friction pad in the circumferential direction or in the direction C as viewed in Fig. 4.
The surface 9 of the stationary member 1 and the surfaces 4a' and 5a' of the friction pad 4 and 5 preferably constitute the braking torque transmitting surfaces, so that when the brake is applied with the disc 10 rotating in the direction of the arrow R as viewed in Fig.
4, the braking torque generated by the friction pad 5, for example, is transmitted to the stationary member 1 through the surface 5a', the tongue portion Bdof the pad spring 8 and the surface 9, with the friction pad 5 being displaced against the spring force, acting in the direction of the arrow C, of the pad spring 8.
On releasing the brake, the friction pad 5 is displaced in the direction of the arrow C according to the resilient force of the tongue portion 8d.
Preferably, the pad spring 8 is formed of stainless steel so that the corrosion or wear of the pad spring can be minimized and the smooth and reliable displacement of the friction pads and the caliper with respect to the stationary member can be assured.
As shown in Fig. 2, a pair of pad springs 8 is preferably provided on the stationary member so that the braking torque generated by the friction pads can be transmitted to the stationary member through the pad spring irrespective to the rotational direction of the disc 10.
According to the invention, the pad spring is formed to extend in the gap between the caliper and the backing plates of respective friction pads to bias the caliper in the radially outward direction and the friction pads in the radially inward direction and, also, to extend in the gap between the stationary member and respective backing plates of the friction pads to bias the friction pads in the circumferential direction, thus, it is possible to minimize the vibrations of the caliper and the friction pads and to assure smooth and reliable operation of the brake.
Claims (4)
1. A disc brake for a vehicle comprising a stationary member for securing to a nonrotatable part of the vehicle, a caliper supported on the stationary member to slide in the direction of the axis of a rotatable disc, a pair of friction pads supported on the stationary member to slide in the direction of the axis of the disc, and a pad spring provided between the stationary member, the caliper, and backing plates of respective friction pads and biassing the caliper in the radially outward direction and the friction pads in the radially inward direction and also in the circumferential direction.
2. A disc brake as claimed in claim 1 in which the pad spring is a leaf spring comprising a first portion extending between a radially outer surface of each backing plate of the friction pads and a radially inner surface of the caliper to bias the friction pads in the radially inward direction and the caliper in the radially outward direction, and second portions extending in a plane substantially radially and axially with respect to the axis of the disc and between adjacent surfaces of the stationary member and respective backing plates of the friction pads so as to bias the friction pads in a circumferential direction.
3. A disc brake as claimed in claim 2, in which the braking torque generated by the friction pads in applying the brake with the disc rotating in one direction is transmitted to the stationary member through said second portions of the pad spring.
4. A disc brake constructed and adapted to operate substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1979038415U JPS6225550Y2 (en) | 1979-03-24 | 1979-03-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2046855A true GB2046855A (en) | 1980-11-19 |
| GB2046855B GB2046855B (en) | 1983-03-09 |
Family
ID=12524666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8009718A Expired GB2046855B (en) | 1979-03-24 | 1980-03-21 | Disc brake for vehicles |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPS6225550Y2 (en) |
| GB (1) | GB2046855B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2495247A1 (en) * | 1980-12-01 | 1982-06-04 | Rockwell International Corp | DISC BRAKE HAVING ANTI-CLIQUETIS DEVICE |
| FR2500096A1 (en) * | 1981-02-19 | 1982-08-20 | Dba | SPRING FOR DISC BRAKE |
| US4498564A (en) * | 1981-09-18 | 1985-02-12 | Tokico Ltd. | Disc brake subassembly having friction pad retaining means |
| US4506767A (en) * | 1979-12-21 | 1985-03-26 | Akebono Brake Industry Co., Ltd. | Pad clip for disc brake |
| GB2147673A (en) * | 1983-10-06 | 1985-05-15 | Teves Gmbh Alfred | Floating caliper spot-type disc brake |
| GB2214163A (en) * | 1988-01-25 | 1989-08-31 | Skc Ltd | Spring for magnetic tape cassette |
| WO2003046401A1 (en) * | 2001-11-30 | 2003-06-05 | Continental Teves Ag & Co. Ohg | Floating caliper disk brake for a motor vehicle |
| EP3019764A4 (en) * | 2013-07-12 | 2017-03-22 | Bendix Spicer Foundation Brake LLC | Brake pad retention device and method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5942508Y2 (en) * | 1976-03-19 | 1984-12-12 | 住友電気工業株式会社 | floating disc brake |
-
1979
- 1979-03-24 JP JP1979038415U patent/JPS6225550Y2/ja not_active Expired
-
1980
- 1980-03-21 GB GB8009718A patent/GB2046855B/en not_active Expired
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4506767A (en) * | 1979-12-21 | 1985-03-26 | Akebono Brake Industry Co., Ltd. | Pad clip for disc brake |
| FR2495247A1 (en) * | 1980-12-01 | 1982-06-04 | Rockwell International Corp | DISC BRAKE HAVING ANTI-CLIQUETIS DEVICE |
| FR2500096A1 (en) * | 1981-02-19 | 1982-08-20 | Dba | SPRING FOR DISC BRAKE |
| EP0059128A1 (en) * | 1981-02-19 | 1982-09-01 | BENDIX France | Pad spring for disc brakes |
| US4463837A (en) * | 1981-02-19 | 1984-08-07 | Societe Anonyme D.B.A. | Spring for disc brake |
| US4498564A (en) * | 1981-09-18 | 1985-02-12 | Tokico Ltd. | Disc brake subassembly having friction pad retaining means |
| GB2147673A (en) * | 1983-10-06 | 1985-05-15 | Teves Gmbh Alfred | Floating caliper spot-type disc brake |
| GB2214163A (en) * | 1988-01-25 | 1989-08-31 | Skc Ltd | Spring for magnetic tape cassette |
| GB2214163B (en) * | 1988-01-25 | 1992-03-25 | Skc Ltd | Spring for magnetic tape cassette |
| WO2003046401A1 (en) * | 2001-11-30 | 2003-06-05 | Continental Teves Ag & Co. Ohg | Floating caliper disk brake for a motor vehicle |
| EP3019764A4 (en) * | 2013-07-12 | 2017-03-22 | Bendix Spicer Foundation Brake LLC | Brake pad retention device and method |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2046855B (en) | 1983-03-09 |
| JPS55137732U (en) | 1980-10-01 |
| JPS6225550Y2 (en) | 1987-06-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4279331A (en) | Floating-caliper disc brake | |
| US5975252A (en) | Disk brake | |
| US4467897A (en) | Disc brake with first and second springs for preventing the vibration of friction pad | |
| US4151899A (en) | Mounting assembly for a disc brake caliper arrangement | |
| JPS6056930B2 (en) | Brake support device for spot type disc brakes | |
| US5025897A (en) | Disk brake | |
| US3416634A (en) | Caliper-type disk brake and support means therefor | |
| GB2087013A (en) | Disc brake and friction pad assembly therefor | |
| US3705641A (en) | Disc brake | |
| US6189659B1 (en) | Disk brake | |
| US4392559A (en) | Disc brake having slidably mounted caliper with friction pad supporting member provided thereon | |
| GB2039646A (en) | Disc brake | |
| US4350229A (en) | Disc brake having a slidably supported caliper | |
| GB2046855A (en) | A disc brake for vehicles | |
| US4422534A (en) | Disc brake | |
| US5954163A (en) | Spring for disc brake | |
| EP0560146A2 (en) | Disc brake assembly | |
| US3661231A (en) | Spot-type disc brake | |
| US4360081A (en) | Disc brake | |
| US5829555A (en) | Disc brake caliper assembly | |
| US4321984A (en) | Floating-caliper spot-type disc brake | |
| US4261443A (en) | Disc brakes for vehicles | |
| US4306636A (en) | Floating-caliper spot-type disc brake | |
| US4511019A (en) | Spot-type disc brake, in particular for automotive vehicles | |
| US4222464A (en) | Disc brake apparatus for a motor vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19970321 |