CA1177001A - Disc brake anti-rattle device - Google Patents
Disc brake anti-rattle deviceInfo
- Publication number
- CA1177001A CA1177001A CA000388878A CA388878A CA1177001A CA 1177001 A CA1177001 A CA 1177001A CA 000388878 A CA000388878 A CA 000388878A CA 388878 A CA388878 A CA 388878A CA 1177001 A CA1177001 A CA 1177001A
- Authority
- CA
- Canada
- Prior art keywords
- friction
- friction pad
- radially
- rotor
- backing plate
- 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.)
- Expired
Links
- 239000002783 friction material Substances 0.000 claims description 4
- 230000000087 stabilizing effect Effects 0.000 description 4
- 241000239290 Araneae Species 0.000 description 1
- 241000518994 Conta Species 0.000 description 1
- 101100310856 Drosophila melanogaster spri gene Proteins 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
-
- 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
- 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
-
- 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
- F16D2055/007—Pins holding the braking members
-
- 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
- F16D2055/0075—Constructional features of axially engaged brakes
- F16D2055/0091—Plural actuators arranged side by side on the same side of the rotor
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
- Clamps And Clips (AREA)
Abstract
DISC BRAKE ANTI-RATTLE MEANS
ABSTRACT OF THE DISCLOSURE
An anti-rattle clip is comprised of a length of spring wire formed to provide two spaced clip leg joined by an intermediate segment. Each clip leg is formed adjacent the intermediate segment to abut spaced areas of the radially outer edge of a friction pad backing plate and the ends of the clip legs are formed to abut spaced areas of the radially outer edge of the other friction pad backing plate. Segments of the clip legs between the segments abutting the friction pad backing plates are formed to extend radially inward and under the circumferentially spaced edges of an aperture provided to the disc brake caliper bridge.
ABSTRACT OF THE DISCLOSURE
An anti-rattle clip is comprised of a length of spring wire formed to provide two spaced clip leg joined by an intermediate segment. Each clip leg is formed adjacent the intermediate segment to abut spaced areas of the radially outer edge of a friction pad backing plate and the ends of the clip legs are formed to abut spaced areas of the radially outer edge of the other friction pad backing plate. Segments of the clip legs between the segments abutting the friction pad backing plates are formed to extend radially inward and under the circumferentially spaced edges of an aperture provided to the disc brake caliper bridge.
Description
~ ~'7~ ~ ~
DISC BRAKE ANTI-RATTLE MEANS
Back&rou~d-of the Inventio~
Field of ~he Invention~ The present inve~tion -relates t~ a di~c brake assembly and more sperifically to an improved means for bia~ing friction pads into abutment with ~upporting means in:the disc brake assembly.
The present invention is par~icularly applicable to a ~isc brake a~sembly of the type wbich includes a rotor or disc mounted for rotation with a vehicle wheel and a flosting caliper straddling the periphery of tbe rotor.
The caliper is~usually mounted on a support or torque plate by mean~ permitting~ moYemen~ of the calip~r in an axial direction reLative to the torque plate and rotor. Brake pads are carrie~ by the caliper OD oppo~ite slde~ of the rotor and are movable into contact with oppos~tely disposed friction brRking surfaces of the rotor by means of a suitabIe actuating mechani~m which is usually driven by a fluid~ motor. In a floatlng caliper disc brake, each friction pad i~ located interm~diate one leg of the caliper 20 a~d the adjacent friction ~urface of the ro~or. The bra~e pad supporting means i~ designed to permit axial movement of the b~ake pad~ and 9 without further res~raint, the friction pads may vibrate agains~ the supporting means or "rattle" when the assembly is~ not actuated. The actua~ing 25 mechanism is usualIy carried by one leg of ~he ealiper a~d serve~ to move the friction pad adjacent to that leg axially into contact with the rotor, the reaction force of the conta~ serv ing to draw the other leg of ~he caliper O~l ~ - 2 -and the other friction pad into contact with the opposite surface of the rotor.
Description of the Prior Art. Various anti-rattle devices for disc brake friction pads are disclosed S in U~S. Patent Nos. 4,194,597; 3,056,174; 3,972,393;
4,049,087 and 3,027,751. Some of these require means such as rivets, apertures or recesses on the friction pad assembly for attaching the anti-rattle device to the friction pad. Other anti-rattle devices are disposed between the friction pad backing plate edge and the supporting means and are not readily accessible for removal or replacement.
The present invention avoids these problems by providing an anti-rattle spring clip easily accessible for removal and replacement purposes which does not require special attaching means on the friction pad baaking plates.
Summary of the Invention According to the invention there is provided in a disc brake, a rotor having axially spaced friction braking surfaces, a caliper including a leg extending radially inward adjacent a friction surface of said rotor, a wall extending radially inward adjacent the other friction surface of said rotor and a bridge straddling the peri-phery of said rotor and joining said leg and said wall, load applying means carried by said wall, a first friction pad between said leg of said caliper and said adjacent friction surface of said rotor, a second friction pad ~ between said load applying means and said other friction ; surface of said rotor, each said friction pad comprising a backing plate having a radially outer edge and friction material secured to a part of said backing plate, an aperture in said bridge defined on two sides by circum-ferentially spaced, axially extending, radially converging edges, means mounting said friction pads on said radially converging edges and an anti-rattle element having segments ;
.~
- 2a -thereof formed to abut the radially outer edges of said first and second friction pad backing plates in said aperture and other segments formed to extend under said radially converging edges to spring load said segments S abutting said first and second friction pad backing plates thereby urging said friction pad backing plates into anti-rattle abutment with said radially converging edges of said aperture.
Other aspects of this invention are disclosed and claimed in a divisional application.
Thus, the present invention, at least in preferred forms, provides a disc brake for a vehicle comprising a rotor having axially spaced friction braking surfaces, a caliper including a leg extending radially inward adjacent a friction surface of the rotor, a wall extending radially inward adjacent the other friction surface of the rotor and a bridge straddling the periphery of the rotor and joining the leg and the wall. Load applying means are carried by the wall. A pair of friction pads are carried by the caliper with each of the pads extending radially inward adjacent one friction surface of the rotor. Each friction pad is comprised of a backing plate having a radially outer edge and friction material secured to a part of the backing plate. An aperture in the bridge is defined on two sides by circumferentially spaced, axially extending, radially converging edges which mount the fric-tion pads for axial movement and an anti-rattle element in the aperture having means formed to abut the radially outer edges of the friction pad backing plates and other means formed to extend under the radially converging edges of the aperture to spring load the means abutting the fric-tion pad backing plates thereby urging the friction pad ~7'~
backing plates into anti-rattle abutment wi~h ~he radially converging ed~es of said aper~ure.
In the preferred embodiment, the anti-rat~le element i~ a spring clip formed tv provide two spaced clip leg~ joined by an intermediate segment, each of the clip legs adjacent the intermediate segmen~ being formed to abut circumferentially spaced areas of the radially outer edge o~ one friction pad backing plate, the ends of the clip legs formed to abut circumferentially spaced areas of the radially outer edge of the other friction pad backing plate and segment~ of the clip legs between the portions abutting the friction pad backing plates are formed to extend radially inward and under the radially converging edges of the aperture.
The advantages offered by the present invention will become apparen~ from the following desc~iption of the embodiment show~ in the accompanying drawings.
_escription of_~_e ~rawin~s In the drawings, wherein li~ce reference numerals refer to like parts:
Figure 1 i~ a side elevation of a disc brake incorporating the present invention;
- ~igure 2 is a front elevation v iew of the disc brake a sembly of Figure 1;
Figure 3 is a perspective view of the anti-rattle ~pri~g clip; and Figure 4 is ~ view partly in ~ection taken along thc line 4~4 of Figure 2.
.
/
With reference to the drawiog~, Figure~ 1 and 2 show a disc brake assembly generaLly designa~ed by the numeral 10. The as~embly 10 includes a 10ating caliper 12 mounted by means of circumferentially spaced, axially aligned pairs of bosses 14 and 15, and 16 and 17 on slide pins 19 and 20. The slide pin5 19 and 20 are respectively secured by a draw keys 23 within bores provided to bosses 21, 22 at the radially outer extremities of circumferen~ially spaced, radially extending arms 24, 25 o~
the brake ~upporting ~orque pla~e or spider 26. The torque plate 26 is provided with ~ circular array of apertures 28 which receive a plurality o bolt~ not shown which in turn secure the ~upport or torque plate 26 to a flange welded to a vehicle axle 29. The torque plate 26 could of cour~e be welded directly to the axle 29. A rotor 30 having axially spaced, radially extending, oppositely disposed friction braking surfaces 31 and 32 is secured for rotation with a wheel hub (not ~hown) carried by the vehicle axle 29 adjacent the disc brake a~sembly 10.
The caliper 12 i~ a cast metal component compri~ed of a depending leg 40 extending radially inward adjacent the frictio~ ~urface 32 of roto~ 30, a~ oppoRitely diRposed depending leg or wall 41 adjacent the friction 15 surface 31 of rotor 30 and a bridge 42 s~raddling the periphery of ro~or 30 and Joining the leg 40 to the wall 41. The w~ll 41 is formed with a generally cylindrical hou~ing 44 having a bore 45 ~lidably mounting a piston 43 formed integrally with a load applyi~g plate 47. The 20 contour of the load plate 47 is similar to the contour of the backing plate 35 of the friction pad 34 and move~ the pad 34 axially iDto contact with the rotor friction Rurface 31 in response to actuation of the brake assembly. Th0 piston 43 and load plate 47 m~y bs moved by ~uitable ~
hydraulic or mechanical actuating mean~, not shown. The bridge 42 of caliper 1~ is provided with an aperture 46 defined by a radially diRposed edge 48 and a pair of circumferentially spaced,axially extending, radially converging edge~ 50 and 51. The circumferentially ~paced edge~ 50, 51 conv~rge in a radial direction a~ an included angle of about 32 degree~. The circumferentially spaced edges 50, 51 are each provided with a slot 52, 54. The bottoms 56, 58 of the slots 52, 54 are substantially parallel and the slots 52, 54 are located radially out~ard from the periphery of the rotor 30 so as to extend at least partly across the periphery of the rotor 30 a~ best shown by Figure 2.
~ riction p~ds 34, 37 are respectively co~prised of backing plate~ 35, 38 with Eriction mlterial 36, 39 ~ecured thereto. The backing plates 38 also include abutment surface~ 61, 62 adjacent the radially converging edges 65 and 66, respectively. The abutment surfaces 71, 72 extend only a short radial distance relative to the lengtb of the radially converging edge~ 65 and 66. The friction pads 34, 37 are axially located between the depending portion~ 40, 41 of the caliper 12. Friction pad 34 is axially located between the load plate 47 and friction.surface 31 of the rotor 30. Friction pad 37 is axially located betw~en the friction surface 32 of rotor 30 and the caliper leg 40. In Figure~ 1 aDd 2, the friction pads 34, 37 are~hown operatively located adjacent the oppositely disposed friction ~urface~ 31, 32 of rotor 30 with the friction material 36~ 39, re~pectively, facing the ~urfaces 31, 32.
The friction pads 34, 37 are supported by m~ans of radially extending tab~ 64 and 67. The friction pad backing plate tabs 64 and 67 are respectively bounded by 20 circumferentially spaced, radially converging edges 65, 66 -and 68, 69 which are slidably carried by the circumferentialLy spaced edge~ 50, 51 of ~he caliper aperture 46. Shallow ~lots 73, 74 and 75, 76 are provided to the radially outer ~dges of frietion p~d tabs 64 and 67, reqpectively. The circumferentially spaced edge~ 65, 66 o~
friction pad tab 64 and edges 68, 69 of friction pad tab 67 converg~ at an angle ~ub~tanti~lLy the same aj the included angle provided to the radially converging edges 50, 51 of caliper aperture 46 to permit the fxiction pad tab~ 64 and 67 to sllde freeIy along the edge3 50 a~d 51. The abutment surfaces 61, 62 of friction pad backing plate 35 and the abutment ~urface~ 71, 72 of backing plate 38 abut the radially inner surface 13 of the caliper 12 adjacen~ the aperture edges 50, 51 to radially locate the friction padQ
relative to tbe surface 13. The circumferentially ~paced, axially extending, radially converging edges 50, 51 of caliper aper~ure 46 thu~ support the tabs 64, 67 of friction pads 34, 37 in their respective operative '7~
positions adjacent the oppositely dispos~d friction surfaces of the rotor 30.
The slots 52, 54 are respectively provided through the circumEerentially spaced edges 50, 51 to provide an additional clearance or length which when taken together with the circumferen~ial length of the caliper aperture 46, is adequate to radially inwardly pass the ~abs 64, 67, respectively, of friction pads 34, 37 and thereby permit installation and removal of the friction pads 34, 37. The width of the ~lot~ 52, 54 i~ ~lightly greater than the thickne~ of the friction pad backing plate tabs 64, 67 and the slots 52, 54 are axially located radially outward of the periphery of the rotor 30 to prevent the backing plate tabs 64, 67 from accidentally or inadvertently becoming aligned with the access slot~ 529 54 when the friction pads 34, 37 are re~pectively in their operative positions adjacent the oppositely di~poged friction surface~ 31, 32 of rotor 30.
An anti-rattle spring clip 80 is di~posed within the aperture 46. As best shown by Figure 3, the an~i-rattle cLip 80 i5 preferably formed from a continuous length of ~pring steel wire to provide two spaced leg segment~ 81, ~2 joined by an intermediate ~egment 84. The clip legs 81 and 82 are respec~ively ~ormed adjacent the in~rmediate segment 84 to pro~ide rai~ed U-shaped bend~ 85 and 86 adapted to abut circumferentially ~paced a~eas of the radially outer sdge of friction pad tab 67~ The di~tal endg ~7, 88 of ~he clip legs are raised to the same level a~ the bend~ 85, 86 to abut circumferentially spaced areas o the ~adially outer edge of friction pad tab 64. The 30 clip leg bend~ 87, 88 are substantially coplanar with the closed end of the U-shaped bends 85, 86. The leg ends 87, 88 extend a substantial distance, approximately 5.5 centimeters, to permit the friction pad 34 to move toward the friction pad 37 while maintaining contact between ~he leg end~ 87, 88 and friction pad tab 64 a~ the friction living material wears.
~ ~ '7'~
The clip leg~ 81, 82 are respectively formed intermediate the U-bend~ 85, 86 and the ends 87, 88 with lat~rally projecting stabilizing means 91, 92. The qtabilizing means 91, 92 are found to ex~end laterally away from eacb other in substantially the same plane which i~
spaced downward or radially inward (Figure 4) from the plane of the U-bend~ 85, 86 and the leg ends 87, 88. As best shown by Figures 2 and 4, the stabilizing m~ans 91, 92 extend under ~he aperture edges 5Q, 51 to engage the under~urface o~ the caliper bridge 42. Thi~ ~or~ionally loads the spring clip 80 and provides a force in U-bend~
85, 86 a~d l~g ends 87, 88 biasing the tab~ 64 and 67 radially inward to force the circumferen~lally ~paced edge of the tabs into abutment with the apertur~ edges 50 9 51.
The spri~g clip 80 may be easily installed by di~posi~g the U-bend~ 85, 86 over the radially outer edge of the friction pad tab 67 until they seat in the groove~
75, 76. One of the stabilizing means 91, g2 is positioned under its corresponding aperture edge and the clip leg end~
20 are moved ~oward one another un~il the other stabilizing means clearc its corresponding aperture edge and can be released to ext~nd laterally beneath that edge surface.
The leg ends 87, 88 are then ~eated i~ thc shallow grooves 73, 74 provided to the radially outer edge of friction pad tab 64.
The pre~ent inve~tion thu~ provides a simple eco~omical means ~or biasing the ~iction pads into bearing abutment with the supporting edges of the caliper aperture to prev~nt the ~riction pad backing plates from vibrating against the supporting edges when the brake assembly is not actuated. The anti-rattle spring clip is also readily acce sible through the caliper aperture.
The inventio~ may al~o be embodied in other specific form~ without departing from the spirit or essential charac~eristics thereof. The foregoing de~cription i~ therefore to be considered as illustrative and not restrictive, the scope o~ the invention being de:f ined by the appended claims a,nd all changes which come within the meaning and range o~ equivalency of the claim~
are therefore intended to be embraced thereby.
DISC BRAKE ANTI-RATTLE MEANS
Back&rou~d-of the Inventio~
Field of ~he Invention~ The present inve~tion -relates t~ a di~c brake assembly and more sperifically to an improved means for bia~ing friction pads into abutment with ~upporting means in:the disc brake assembly.
The present invention is par~icularly applicable to a ~isc brake a~sembly of the type wbich includes a rotor or disc mounted for rotation with a vehicle wheel and a flosting caliper straddling the periphery of tbe rotor.
The caliper is~usually mounted on a support or torque plate by mean~ permitting~ moYemen~ of the calip~r in an axial direction reLative to the torque plate and rotor. Brake pads are carrie~ by the caliper OD oppo~ite slde~ of the rotor and are movable into contact with oppos~tely disposed friction brRking surfaces of the rotor by means of a suitabIe actuating mechani~m which is usually driven by a fluid~ motor. In a floatlng caliper disc brake, each friction pad i~ located interm~diate one leg of the caliper 20 a~d the adjacent friction ~urface of the ro~or. The bra~e pad supporting means i~ designed to permit axial movement of the b~ake pad~ and 9 without further res~raint, the friction pads may vibrate agains~ the supporting means or "rattle" when the assembly is~ not actuated. The actua~ing 25 mechanism is usualIy carried by one leg of ~he ealiper a~d serve~ to move the friction pad adjacent to that leg axially into contact with the rotor, the reaction force of the conta~ serv ing to draw the other leg of ~he caliper O~l ~ - 2 -and the other friction pad into contact with the opposite surface of the rotor.
Description of the Prior Art. Various anti-rattle devices for disc brake friction pads are disclosed S in U~S. Patent Nos. 4,194,597; 3,056,174; 3,972,393;
4,049,087 and 3,027,751. Some of these require means such as rivets, apertures or recesses on the friction pad assembly for attaching the anti-rattle device to the friction pad. Other anti-rattle devices are disposed between the friction pad backing plate edge and the supporting means and are not readily accessible for removal or replacement.
The present invention avoids these problems by providing an anti-rattle spring clip easily accessible for removal and replacement purposes which does not require special attaching means on the friction pad baaking plates.
Summary of the Invention According to the invention there is provided in a disc brake, a rotor having axially spaced friction braking surfaces, a caliper including a leg extending radially inward adjacent a friction surface of said rotor, a wall extending radially inward adjacent the other friction surface of said rotor and a bridge straddling the peri-phery of said rotor and joining said leg and said wall, load applying means carried by said wall, a first friction pad between said leg of said caliper and said adjacent friction surface of said rotor, a second friction pad ~ between said load applying means and said other friction ; surface of said rotor, each said friction pad comprising a backing plate having a radially outer edge and friction material secured to a part of said backing plate, an aperture in said bridge defined on two sides by circum-ferentially spaced, axially extending, radially converging edges, means mounting said friction pads on said radially converging edges and an anti-rattle element having segments ;
.~
- 2a -thereof formed to abut the radially outer edges of said first and second friction pad backing plates in said aperture and other segments formed to extend under said radially converging edges to spring load said segments S abutting said first and second friction pad backing plates thereby urging said friction pad backing plates into anti-rattle abutment with said radially converging edges of said aperture.
Other aspects of this invention are disclosed and claimed in a divisional application.
Thus, the present invention, at least in preferred forms, provides a disc brake for a vehicle comprising a rotor having axially spaced friction braking surfaces, a caliper including a leg extending radially inward adjacent a friction surface of the rotor, a wall extending radially inward adjacent the other friction surface of the rotor and a bridge straddling the periphery of the rotor and joining the leg and the wall. Load applying means are carried by the wall. A pair of friction pads are carried by the caliper with each of the pads extending radially inward adjacent one friction surface of the rotor. Each friction pad is comprised of a backing plate having a radially outer edge and friction material secured to a part of the backing plate. An aperture in the bridge is defined on two sides by circumferentially spaced, axially extending, radially converging edges which mount the fric-tion pads for axial movement and an anti-rattle element in the aperture having means formed to abut the radially outer edges of the friction pad backing plates and other means formed to extend under the radially converging edges of the aperture to spring load the means abutting the fric-tion pad backing plates thereby urging the friction pad ~7'~
backing plates into anti-rattle abutment wi~h ~he radially converging ed~es of said aper~ure.
In the preferred embodiment, the anti-rat~le element i~ a spring clip formed tv provide two spaced clip leg~ joined by an intermediate segment, each of the clip legs adjacent the intermediate segmen~ being formed to abut circumferentially spaced areas of the radially outer edge o~ one friction pad backing plate, the ends of the clip legs formed to abut circumferentially spaced areas of the radially outer edge of the other friction pad backing plate and segment~ of the clip legs between the portions abutting the friction pad backing plates are formed to extend radially inward and under the radially converging edges of the aperture.
The advantages offered by the present invention will become apparen~ from the following desc~iption of the embodiment show~ in the accompanying drawings.
_escription of_~_e ~rawin~s In the drawings, wherein li~ce reference numerals refer to like parts:
Figure 1 i~ a side elevation of a disc brake incorporating the present invention;
- ~igure 2 is a front elevation v iew of the disc brake a sembly of Figure 1;
Figure 3 is a perspective view of the anti-rattle ~pri~g clip; and Figure 4 is ~ view partly in ~ection taken along thc line 4~4 of Figure 2.
.
/
With reference to the drawiog~, Figure~ 1 and 2 show a disc brake assembly generaLly designa~ed by the numeral 10. The as~embly 10 includes a 10ating caliper 12 mounted by means of circumferentially spaced, axially aligned pairs of bosses 14 and 15, and 16 and 17 on slide pins 19 and 20. The slide pin5 19 and 20 are respectively secured by a draw keys 23 within bores provided to bosses 21, 22 at the radially outer extremities of circumferen~ially spaced, radially extending arms 24, 25 o~
the brake ~upporting ~orque pla~e or spider 26. The torque plate 26 is provided with ~ circular array of apertures 28 which receive a plurality o bolt~ not shown which in turn secure the ~upport or torque plate 26 to a flange welded to a vehicle axle 29. The torque plate 26 could of cour~e be welded directly to the axle 29. A rotor 30 having axially spaced, radially extending, oppositely disposed friction braking surfaces 31 and 32 is secured for rotation with a wheel hub (not ~hown) carried by the vehicle axle 29 adjacent the disc brake a~sembly 10.
The caliper 12 i~ a cast metal component compri~ed of a depending leg 40 extending radially inward adjacent the frictio~ ~urface 32 of roto~ 30, a~ oppoRitely diRposed depending leg or wall 41 adjacent the friction 15 surface 31 of rotor 30 and a bridge 42 s~raddling the periphery of ro~or 30 and Joining the leg 40 to the wall 41. The w~ll 41 is formed with a generally cylindrical hou~ing 44 having a bore 45 ~lidably mounting a piston 43 formed integrally with a load applyi~g plate 47. The 20 contour of the load plate 47 is similar to the contour of the backing plate 35 of the friction pad 34 and move~ the pad 34 axially iDto contact with the rotor friction Rurface 31 in response to actuation of the brake assembly. Th0 piston 43 and load plate 47 m~y bs moved by ~uitable ~
hydraulic or mechanical actuating mean~, not shown. The bridge 42 of caliper 1~ is provided with an aperture 46 defined by a radially diRposed edge 48 and a pair of circumferentially spaced,axially extending, radially converging edge~ 50 and 51. The circumferentially ~paced edge~ 50, 51 conv~rge in a radial direction a~ an included angle of about 32 degree~. The circumferentially spaced edges 50, 51 are each provided with a slot 52, 54. The bottoms 56, 58 of the slots 52, 54 are substantially parallel and the slots 52, 54 are located radially out~ard from the periphery of the rotor 30 so as to extend at least partly across the periphery of the rotor 30 a~ best shown by Figure 2.
~ riction p~ds 34, 37 are respectively co~prised of backing plate~ 35, 38 with Eriction mlterial 36, 39 ~ecured thereto. The backing plates 38 also include abutment surface~ 61, 62 adjacent the radially converging edges 65 and 66, respectively. The abutment surfaces 71, 72 extend only a short radial distance relative to the lengtb of the radially converging edge~ 65 and 66. The friction pads 34, 37 are axially located between the depending portion~ 40, 41 of the caliper 12. Friction pad 34 is axially located between the load plate 47 and friction.surface 31 of the rotor 30. Friction pad 37 is axially located betw~en the friction surface 32 of rotor 30 and the caliper leg 40. In Figure~ 1 aDd 2, the friction pads 34, 37 are~hown operatively located adjacent the oppositely disposed friction ~urface~ 31, 32 of rotor 30 with the friction material 36~ 39, re~pectively, facing the ~urfaces 31, 32.
The friction pads 34, 37 are supported by m~ans of radially extending tab~ 64 and 67. The friction pad backing plate tabs 64 and 67 are respectively bounded by 20 circumferentially spaced, radially converging edges 65, 66 -and 68, 69 which are slidably carried by the circumferentialLy spaced edge~ 50, 51 of ~he caliper aperture 46. Shallow ~lots 73, 74 and 75, 76 are provided to the radially outer ~dges of frietion p~d tabs 64 and 67, reqpectively. The circumferentially spaced edge~ 65, 66 o~
friction pad tab 64 and edges 68, 69 of friction pad tab 67 converg~ at an angle ~ub~tanti~lLy the same aj the included angle provided to the radially converging edges 50, 51 of caliper aperture 46 to permit the fxiction pad tab~ 64 and 67 to sllde freeIy along the edge3 50 a~d 51. The abutment surfaces 61, 62 of friction pad backing plate 35 and the abutment ~urface~ 71, 72 of backing plate 38 abut the radially inner surface 13 of the caliper 12 adjacen~ the aperture edges 50, 51 to radially locate the friction padQ
relative to tbe surface 13. The circumferentially ~paced, axially extending, radially converging edges 50, 51 of caliper aper~ure 46 thu~ support the tabs 64, 67 of friction pads 34, 37 in their respective operative '7~
positions adjacent the oppositely dispos~d friction surfaces of the rotor 30.
The slots 52, 54 are respectively provided through the circumEerentially spaced edges 50, 51 to provide an additional clearance or length which when taken together with the circumferen~ial length of the caliper aperture 46, is adequate to radially inwardly pass the ~abs 64, 67, respectively, of friction pads 34, 37 and thereby permit installation and removal of the friction pads 34, 37. The width of the ~lot~ 52, 54 i~ ~lightly greater than the thickne~ of the friction pad backing plate tabs 64, 67 and the slots 52, 54 are axially located radially outward of the periphery of the rotor 30 to prevent the backing plate tabs 64, 67 from accidentally or inadvertently becoming aligned with the access slot~ 529 54 when the friction pads 34, 37 are re~pectively in their operative positions adjacent the oppositely di~poged friction surface~ 31, 32 of rotor 30.
An anti-rattle spring clip 80 is di~posed within the aperture 46. As best shown by Figure 3, the an~i-rattle cLip 80 i5 preferably formed from a continuous length of ~pring steel wire to provide two spaced leg segment~ 81, ~2 joined by an intermediate ~egment 84. The clip legs 81 and 82 are respec~ively ~ormed adjacent the in~rmediate segment 84 to pro~ide rai~ed U-shaped bend~ 85 and 86 adapted to abut circumferentially ~paced a~eas of the radially outer sdge of friction pad tab 67~ The di~tal endg ~7, 88 of ~he clip legs are raised to the same level a~ the bend~ 85, 86 to abut circumferentially spaced areas o the ~adially outer edge of friction pad tab 64. The 30 clip leg bend~ 87, 88 are substantially coplanar with the closed end of the U-shaped bends 85, 86. The leg ends 87, 88 extend a substantial distance, approximately 5.5 centimeters, to permit the friction pad 34 to move toward the friction pad 37 while maintaining contact between ~he leg end~ 87, 88 and friction pad tab 64 a~ the friction living material wears.
~ ~ '7'~
The clip leg~ 81, 82 are respectively formed intermediate the U-bend~ 85, 86 and the ends 87, 88 with lat~rally projecting stabilizing means 91, 92. The qtabilizing means 91, 92 are found to ex~end laterally away from eacb other in substantially the same plane which i~
spaced downward or radially inward (Figure 4) from the plane of the U-bend~ 85, 86 and the leg ends 87, 88. As best shown by Figures 2 and 4, the stabilizing m~ans 91, 92 extend under ~he aperture edges 5Q, 51 to engage the under~urface o~ the caliper bridge 42. Thi~ ~or~ionally loads the spring clip 80 and provides a force in U-bend~
85, 86 a~d l~g ends 87, 88 biasing the tab~ 64 and 67 radially inward to force the circumferen~lally ~paced edge of the tabs into abutment with the apertur~ edges 50 9 51.
The spri~g clip 80 may be easily installed by di~posi~g the U-bend~ 85, 86 over the radially outer edge of the friction pad tab 67 until they seat in the groove~
75, 76. One of the stabilizing means 91, g2 is positioned under its corresponding aperture edge and the clip leg end~
20 are moved ~oward one another un~il the other stabilizing means clearc its corresponding aperture edge and can be released to ext~nd laterally beneath that edge surface.
The leg ends 87, 88 are then ~eated i~ thc shallow grooves 73, 74 provided to the radially outer edge of friction pad tab 64.
The pre~ent inve~tion thu~ provides a simple eco~omical means ~or biasing the ~iction pads into bearing abutment with the supporting edges of the caliper aperture to prev~nt the ~riction pad backing plates from vibrating against the supporting edges when the brake assembly is not actuated. The anti-rattle spring clip is also readily acce sible through the caliper aperture.
The inventio~ may al~o be embodied in other specific form~ without departing from the spirit or essential charac~eristics thereof. The foregoing de~cription i~ therefore to be considered as illustrative and not restrictive, the scope o~ the invention being de:f ined by the appended claims a,nd all changes which come within the meaning and range o~ equivalency of the claim~
are therefore intended to be embraced thereby.
Claims (4)
1. In a disc brake, a rotor having axially spaced friction braking surface, a caliper including a leg extending radially inward adjacent a friction surface of said rotor, a wall extending radially inward adjacent the other friction surface of said rotor and a bridge straddling the periphery of said rotor and joining said leg and said wall, load applying means carried by said wall, a first friction pad between said leg of said caliper and said adjacent friction surface of said rotor, a second friction pad between said load applying mean and said other friction surface of said rotor, each said friction pad comprising a backing plate having a radially outer edge and friction material secured to a part of said backing plate, an aperture in said bridge defined on two sides by circumferentially spaced, axially extending, radially converging edges, means mounting said friction pads on said radially converging edges and an anti-rattle element having segments thereof formed to abut the radially outer edges of said first and second friction pad backing plates in said aperture and other segments formed to extend under said radially converging edges to spring load said segments abutting said first and second friction pad backing plates thereby urging said friction pad backing plates into anti-rattle abutment with said radially converging edges of said aperture.
2. The disc brake defined by Claim 1 wherein said anti-rattle element is a spring clip formed to provide two spaced clip legs joined by an intermediate segment, each of said clip legs adjacent said intermediate segment formed to abut circumferentially spaced areas of the radially outer edge of said first friction pad backing plate, the ends of said clip legs formed to abut circumferentially spaced areas of the radially outer edge of said second friction pad backing plate and segments of said clip legs between said segments abutting said first and second friction pad backing plates formed to extend radially inward and under said radially converging edges of said aperture.
3. The disc brake defined by Claim 2 wherein the ends of said clip legs are formed to abut circumferentially spaced areas of the radially outer edge of said second friction pad backing plate over a substantial length of said clip legs to permit axial movement of said second friction pad backing plate toward said first friction pad.
4. The disc brake defined by Claim 1 wherein said fiction pad backing plates each include a tab extending radially therefrom bounded by circumferentially spaced, converging edges slidably carried by said radially con-verging edges of said aperture and said segments of said anti-rattle element abut the radially outer edges of said tabs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000445904A CA1181701A (en) | 1980-12-01 | 1984-01-23 | Disc brake anti-rattle means |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US21200380A | 1980-12-01 | 1980-12-01 | |
| US212,003 | 1980-12-01 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000445904A Division CA1181701A (en) | 1980-12-01 | 1984-01-23 | Disc brake anti-rattle means |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1177001A true CA1177001A (en) | 1984-10-30 |
Family
ID=22789155
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000388878A Expired CA1177001A (en) | 1980-12-01 | 1981-10-27 | Disc brake anti-rattle device |
Country Status (12)
| Country | Link |
|---|---|
| JP (1) | JPS57120740A (en) |
| AU (2) | AU550706B2 (en) |
| BR (1) | BR8107777A (en) |
| CA (1) | CA1177001A (en) |
| CH (1) | CH657902A5 (en) |
| DE (1) | DE3147575A1 (en) |
| FR (1) | FR2495247B1 (en) |
| GB (1) | GB2088500B (en) |
| HU (1) | HU188714B (en) |
| IT (1) | IT1143447B (en) |
| MX (1) | MX161746A (en) |
| SE (2) | SE450157B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2137293B (en) * | 1980-12-01 | 1985-08-29 | Rockwell International Corp | Anti-rattle means for disc brakes |
| US4352414A (en) * | 1980-12-01 | 1982-10-05 | Rockwell International Corporation | Friction pad and support for a disc brake |
| DE3223627A1 (en) * | 1982-06-24 | 1983-12-29 | Alfred Teves Gmbh, 6000 Frankfurt | FLOATING SADDLE DISC BRAKE |
| US4487296A (en) * | 1982-11-29 | 1984-12-11 | The Bendix Corporation | Wire spring for a disc brake |
| DE3323362A1 (en) * | 1983-06-29 | 1985-01-03 | Alfred Teves Gmbh, 6000 Frankfurt | SPRING ARRANGEMENT ON A BRAKE SHOE OF A PARTIAL PAD DISC BRAKE |
| DE3336302A1 (en) * | 1983-10-06 | 1985-04-18 | Alfred Teves Gmbh, 6000 Frankfurt | FLOATING SADDLE PARTIAL DISC BRAKE, ESPECIALLY FOR MOTOR VEHICLES |
| DE3446755A1 (en) * | 1984-12-21 | 1986-07-03 | Alfred Teves Gmbh, 6000 Frankfurt | Spot-type disc brake |
| DE3534239C2 (en) * | 1985-09-26 | 1994-12-08 | Teves Gmbh Alfred | Pressure plate with holding device for floating caliper brake pads |
| GB2370079B (en) * | 2000-12-18 | 2004-09-29 | Federal Mogul Brake Syst Ltd | Friction element control in disc brakes |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3189129A (en) * | 1962-10-04 | 1965-06-15 | Bendix Corp | Brake shoe retainer |
| DE1555709C3 (en) * | 1965-06-04 | 1974-01-24 | Maschinen- Und Werkzeugbau Zuffenhausen Ag, 7000 Stuttgart | Partly lined disc brake with floating caliper and floating brake cylinder |
| FR2325298A5 (en) * | 1973-11-08 | 1977-04-15 | Dba | DISC BRAKE |
| DE2408519C2 (en) * | 1974-02-22 | 1982-07-22 | Alfred Teves Gmbh, 6000 Frankfurt | Sliding guide for the saddle of a floating-caliper partially lined disc brake, in particular for motor vehicles |
| FR2288911A1 (en) * | 1974-10-25 | 1976-05-21 | Dba | Spring mounting for disc brake - has spring between saddle and carrier plate to prevent rattling |
| FR2311965A2 (en) * | 1975-05-23 | 1976-12-17 | Dba | Spring mounting for disc brake - has spring between saddle and carrier plate to prevent rattling |
| GB1533976A (en) * | 1974-12-24 | 1978-11-29 | Girling Ltd | Friction pad assemblies for sliding caliper disc brakes |
| US4027751A (en) * | 1975-12-17 | 1977-06-07 | Societe Anonyme D.B.A. | Noise-reducing spring for a disc brake |
| GB1535228A (en) * | 1976-03-30 | 1978-12-13 | Tokico Ltd | Disc brakes |
| JPS59514Y2 (en) * | 1977-11-15 | 1984-01-09 | 日信工業株式会社 | disc brake device |
| DE2809383C2 (en) * | 1978-03-04 | 1986-09-25 | Alfred Teves Gmbh, 6000 Frankfurt | Quickly releasable and tensionable brake shoe holder for disc brakes |
| JPS6225550Y2 (en) * | 1979-03-24 | 1987-06-30 |
-
1981
- 1981-10-27 CA CA000388878A patent/CA1177001A/en not_active Expired
- 1981-10-28 AU AU76920/81A patent/AU550706B2/en not_active Ceased
- 1981-11-05 GB GB8133355A patent/GB2088500B/en not_active Expired
- 1981-11-25 CH CH7553/81A patent/CH657902A5/en not_active IP Right Cessation
- 1981-11-26 HU HU813543A patent/HU188714B/en unknown
- 1981-11-26 IT IT49779/81A patent/IT1143447B/en active
- 1981-11-27 SE SE8107095A patent/SE450157B/en not_active IP Right Cessation
- 1981-11-30 BR BR8107777A patent/BR8107777A/en unknown
- 1981-11-30 FR FR8122371A patent/FR2495247B1/en not_active Expired
- 1981-11-30 JP JP56192668A patent/JPS57120740A/en active Granted
- 1981-12-01 DE DE19813147575 patent/DE3147575A1/en not_active Ceased
- 1981-12-01 MX MX190360A patent/MX161746A/en unknown
-
1986
- 1986-01-10 AU AU52233/86A patent/AU576934B2/en not_active Ceased
- 1986-04-11 SE SE8601638A patent/SE463112B/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| CH657902A5 (en) | 1986-09-30 |
| SE450157B (en) | 1987-06-09 |
| GB2088500A (en) | 1982-06-09 |
| FR2495247A1 (en) | 1982-06-04 |
| IT8149779A0 (en) | 1981-11-26 |
| AU576934B2 (en) | 1988-09-08 |
| IT1143447B (en) | 1986-10-22 |
| HU188714B (en) | 1986-05-28 |
| SE8107095L (en) | 1982-06-02 |
| DE3147575A1 (en) | 1982-08-19 |
| GB2088500B (en) | 1985-07-24 |
| AU5223386A (en) | 1986-05-15 |
| AU550706B2 (en) | 1986-04-10 |
| JPS57120740A (en) | 1982-07-27 |
| SE8601638L (en) | 1986-04-11 |
| SE8601638D0 (en) | 1986-04-11 |
| JPH0228737B2 (en) | 1990-06-26 |
| SE463112B (en) | 1990-10-08 |
| MX161746A (en) | 1990-12-20 |
| BR8107777A (en) | 1982-08-31 |
| AU7692081A (en) | 1982-06-10 |
| FR2495247B1 (en) | 1986-05-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |