GB2036214A - Disc brake - Google Patents
Disc brake Download PDFInfo
- Publication number
- GB2036214A GB2036214A GB7939513A GB7939513A GB2036214A GB 2036214 A GB2036214 A GB 2036214A GB 7939513 A GB7939513 A GB 7939513A GB 7939513 A GB7939513 A GB 7939513A GB 2036214 A GB2036214 A GB 2036214A
- Authority
- GB
- United Kingdom
- Prior art keywords
- disc
- caliper
- friction pad
- arm portion
- disc brake
- 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- Withdrawn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
- F16D65/00—Parts or details
- F16D65/78—Features relating to cooling
- F16D65/84—Features relating to cooling for disc brakes
- F16D65/847—Features relating to cooling for disc brakes with open cooling system, e.g. cooled by air
-
- 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
- F16D65/78—Features relating to cooling
- F16D2065/785—Heat insulation or reflection
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
One arm portion (5b) of a disc brake slidable caliper (5) abuts one friction pad (9) at one side of a rotatable disc (2), and another arm portion (5a) of the caliper has therein a piston (8) for pressing the other friction pad (7) against the other side of the disc. A plurality of grooves (11) is formed in the one arm portion (5b) of the caliper in the face (10) thereof abutting the one friction pad (9) to reduce heat transfer to the caliper and to ventilate the back of the pad. <IMAGE>
Description
SPECIFICATION
Disc brake
This invention relates to a disc brake and, particularly, to a disc brake wherein the heat generated in applying the brake can effectively be dissipated.
One conventional disc brake comprises a caliper provided with one arm portion abutting with one friction pad against one side of a rotatable disc and another arm portion having therein a piston for pressing another friction pad against the other side of the disc. In applying the brake, a large amount of heat of friction will be generated between the disc and the friction pads, and a substantial proportion of the heat is transmitted from the aforementioned one friction pad or the outer pad to the caliper thus heating hydraulic fluid actuating the piston. Particularly, when the brake has been applied heavily, the caliper will be heated excessively, this causing vapour lock phenomenon, and deterioration of rubber parts such as seals or boots.Further, when the caliper is formed of light metal, the mechanical strength of the material decreases substantially at high temperature, thus, a desired braking characteristic cannot be maintained and the brake will sometimes rupture.
To solvent the problems aformentioned, there has been proposed to increase the heat capacity of the brake or to provide a ventilating device, but such proposals are objective because of increasing cost or of requiring a large installation space.
One object of the invention is to solve the problems aformentioned, and the disc brake according to the invention comprises a caliper having one arm portion abutting one friction pad which acts against one side of a rotatable disc and another arm portion having therein a piston for pressing the other friction pad against the other side of the disc, a plurality of grooves being formed in aforementioned one arm portion of the caliper in the face thereof abutting said one friction pad.
A preferred embodiment of the invention is described below, by way of example only, with reference to the accompanying drawings, in which:
Figure 1 is a side view of one form of disc brake according to the invention;
Figure 2 is a sectional view taken along the longitudinal centre line of the disc brake of
Fig. 1;
Figure 3 is a sectional view taken along line Ill-Ill in Fig. 1, and
Figure 4 is a sectional view taken along line
IV-IV in Fig. 1.
The disc brake illustrated in the drawings comprises a mounting bracket 1 having a generally plate like form and being located at one side of a rotatable disc 2. The mounting bracket 1 is secured to a non-rotatable part (not shown) of a vehicle such as a motor cycle or the like. A pair of parallel pins 3 and 4 is secured to the mounting bracket 1 by suitable means such as force fitting, welding or the like with a first end 3a or 4a of the respective pin 3 or 4 extending across the circumference of the disc (the leftward direction as viewed in
Fig. 1) and, the other or second end 3bor 4b of the respective pin 3 or 4 extending in the opposite direction or the direction away from the disc. The pins 3 and 4 are spaced from one another in the direction of the circumference of the disc. The mounting bracket 1 and pins 3 and 4 constitute a holder H.
A caliper 5 is slidably supported on the second ends 3b and 4b of pins 3 and 4, and one arm portion 5b of the caliper 5 straddles the disc 2 and extends to the rear surface of a friction pad 9 to press the friction pad 9 against the disc 2 in applying the brake. The friction pad 9 is, as shown clearly in Figs. 1 and 4, slidably supported on aforesaid first ends 3a and 4a of the pins 3 and 4. A cylinder 6 opening towards the disc 2 is formed in another arm portion 5a of the caliper 5, and sealingly and slidably receives therein a piston 8. The piston 8 abuts with and presses a friction pad 7 against the disc 2 in applying the brake. The friction pads 7 and 9 are oppositely disposed against the disc 2.
The friction pad 7 is, as clearly shown in Fig.
3, slidably received in a recess 1 5 formed in the mounting bracket 1. There are formed shoulders 1 6 in the recess 1 5 for mounting thereon correspondingly shaped projections formed on the friction pad 9. A boot 1 2 covers the sliding portion between each of the pins 3 and 4 and the caliper 5, and a boot 1 3 prevents the space between the piston 8 and the cylinder 6 from the ingress of dust, water or the like, and a seal 14 maintains liquid tightness between the piston 8 and the cylinder 6 and also acts, by virtue of its resilience, to retract the piston 8 in releasing the hydraulic pressure in the cylinder 6.
A plurality of grooves 11 is formed in a face 10 of the arm portion 5b of the caliper 5. The face 10 is defined as the face abutting with the friction pad 9. The contact area between the arm portion 5b and the friction pad is reduced. Therefore, the heat transmission between the arm portion 5b and the friction pad 9 can substantially be reduced.
The configuration of the grooves 11 may be determined as desired but, preferably, the configuration and the arrangement of the grooves 11 shall be determined such that a substantial amount of air flows through the grooves in running the vehicle, whereby, the heat transmission from the friction pad 9 to the arm portion 5b can be minimized.
The operation of the disc brake having aforesaid construction will be clear for those skilled in the art and, therefore, detailed description therefor is omitted. In applying the brake, oil under pressure is supplied into the cylinder 6 and the piston 8 presses the friction pad 7 against the disc 2, and the reaction force moves the caliper 5 in the rightward direction as viewed in Fig. 2 thereby the arm portion 5b of the caliper 5 presses the friction pad 9 against the disc.The friction heat generated between the friction pads 7 and 9 and the disc 2 is partly transmitted to the mounting bracket 1 through the slidingly contacting portions between the friction pad 7 and the mounting bracket 1 and through the friction pad 9 and the pins 3 and 4, and is partly transmitted from the friction pad 7 to the piston 8 through annular contacting surfaces therebetween and from the friction pad 9 to the arm portion 5b of the calipter 5 through the abutting face 10 and, also, is dissipated to the surrounding air.
As described heretofore, it is possible to substantially decrease the heat transmission from the friction pad 9 to the caliper 5, according to the invention, and to increase the dissipation of the heat which would, otherwise, be transmitted to the caliper, thus avoiding the deterioration of rubber material and hydraulic oil, avoiding the vapour lock phenomenon, and maintaining the strength of the caliper which would otherwise decrease according to high temperature, particularly when the caliper is made of light metal.
Claims (4)
1. A disc brake including a caliper provided with one arm portion abutting one friction pad which acts against one side of a rotatable disc and another arm portion having therein a piston for pressing the other friction pad against the other side of the disc, a plurality of grooves being formed in said one arm portion of the caliper in the face thereof abutting said one friction pad.
2. A disc brake as claimed in claim 1, wherein the configuration and arrangement of said grooves is such that a substantial amount of air can flow through the grooves when the disc brake is installed on a vehicle and the vehicle is running.
3. A disc brake as claimed in claim 1 or 2, wherein the caliper is made of light metal.
4. A disc brake constructed and adapted to operate substantially as herein described with reference to and as illustrated in the drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15787878U JPS5573629U (en) | 1978-11-16 | 1978-11-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB2036214A true GB2036214A (en) | 1980-06-25 |
Family
ID=15659377
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7939513A Withdrawn GB2036214A (en) | 1978-11-16 | 1979-11-15 | Disc brake |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPS5573629U (en) |
| AU (1) | AU5269979A (en) |
| GB (1) | GB2036214A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2187807A (en) * | 1986-03-13 | 1987-09-16 | Teves Gmbh Alfred | Spot-type disc brake, in particular for motor vehicles |
| GB2214581A (en) * | 1988-01-11 | 1989-09-06 | Brembo Spa | "Integral Structure for Disc Brake Unit" |
| DE102006036277A1 (en) * | 2006-08-03 | 2008-02-07 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Disk brake for commercial motor vehicle, has brake carrier clamp with projection, which protrudes into lining groove, where projection corresponds with recess at outer edge of brake pads |
| CN102588473A (en) * | 2011-04-02 | 2012-07-18 | 吴佩芳 | Installation steel backing for powder metallurgy brake pad of rapid train |
-
1978
- 1978-11-16 JP JP15787878U patent/JPS5573629U/ja active Pending
-
1979
- 1979-11-09 AU AU52699/79A patent/AU5269979A/en not_active Abandoned
- 1979-11-15 GB GB7939513A patent/GB2036214A/en not_active Withdrawn
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2187807A (en) * | 1986-03-13 | 1987-09-16 | Teves Gmbh Alfred | Spot-type disc brake, in particular for motor vehicles |
| GB2187807B (en) * | 1986-03-13 | 1990-07-18 | Teves Gmbh Alfred | Spot-type disc brake, in particular for motor vehicles |
| US5002160A (en) * | 1986-03-13 | 1991-03-26 | Alfred Teves Gmbh | Spot-type disc brake with ventilation channel |
| GB2214581A (en) * | 1988-01-11 | 1989-09-06 | Brembo Spa | "Integral Structure for Disc Brake Unit" |
| DE102006036277A1 (en) * | 2006-08-03 | 2008-02-07 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Disk brake for commercial motor vehicle, has brake carrier clamp with projection, which protrudes into lining groove, where projection corresponds with recess at outer edge of brake pads |
| DE102006036277B4 (en) * | 2006-08-03 | 2015-12-31 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Disc brake, in particular for a commercial vehicle |
| CN102588473A (en) * | 2011-04-02 | 2012-07-18 | 吴佩芳 | Installation steel backing for powder metallurgy brake pad of rapid train |
| CN102588473B (en) * | 2011-04-02 | 2015-03-25 | 北京天宜上佳新材料有限公司 | Installation steel backing for powder metallurgy brake pad of rapid train |
Also Published As
| Publication number | Publication date |
|---|---|
| AU5269979A (en) | 1980-05-22 |
| JPS5573629U (en) | 1980-05-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1561679B1 (en) | Apparatus for a disk brake | |
| US4044864A (en) | Disc brake | |
| US5445242A (en) | Disc brake caliper with auxiliary system to cool brake fluid | |
| US4494630A (en) | Floating-caliper spot-type disc brake | |
| US4085828A (en) | Disc brake and heat shield for the same | |
| US5090520A (en) | Spot-type disc brake, including a floating caliper having pressure and heat insulating plate | |
| US3865215A (en) | Spot-type disc brake | |
| US4867280A (en) | Hydraulically actuated wheel brake | |
| US3460651A (en) | Caliper disc brake and mounting means therefor | |
| GB2184801A (en) | Disc brakes | |
| GB2129878A (en) | Hydraulic actuating unit | |
| EP0087876B1 (en) | Disc brake caliper assembly | |
| GB2036214A (en) | Disc brake | |
| US4342381A (en) | Disc brake | |
| US4878564A (en) | Disc brake assembly | |
| GB1561147A (en) | Spot-type disc brake | |
| US3983969A (en) | Disc brake caliper and friction pad mounting | |
| JPS6267337A (en) | Cooling device for disc brake | |
| US3944028A (en) | Disc brake and actuator assembly structure | |
| GB2046855A (en) | A disc brake for vehicles | |
| GB2125124A (en) | Hydraulically actuated disc brake | |
| JPS621466Y2 (en) | ||
| GB2029532A (en) | Disc brake | |
| US3326332A (en) | Floating yoke disc brake | |
| US3973652A (en) | Closed loop type disc brake |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |