CA1171003A - Disc brake caliper support - Google Patents
Disc brake caliper supportInfo
- Publication number
- CA1171003A CA1171003A CA000388876A CA388876A CA1171003A CA 1171003 A CA1171003 A CA 1171003A CA 000388876 A CA000388876 A CA 000388876A CA 388876 A CA388876 A CA 388876A CA 1171003 A CA1171003 A CA 1171003A
- Authority
- CA
- Canada
- Prior art keywords
- bore
- pin
- draw key
- disc brake
- recess
- 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
- 238000003780 insertion Methods 0.000 claims abstract description 3
- 230000037431 insertion Effects 0.000 claims abstract description 3
- 150000002500 ions Chemical class 0.000 description 4
- 241000239290 Araneae Species 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- BALXUFOVQVENIU-KXNXZCPBSA-N pseudoephedrine hydrochloride Chemical compound [H+].[Cl-].CN[C@@H](C)[C@@H](O)C1=CC=CC=C1 BALXUFOVQVENIU-KXNXZCPBSA-N 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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B3/00—Key-type connections; Keys
-
- 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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B21/00—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings
- F16B21/10—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts
- F16B21/16—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts with grooves or notches in the pin or shaft
-
- 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
- F16D55/22655—Constructional details of guide pins
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
- F16D55/02—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
- F16D55/22—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads
- F16D55/224—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members
- F16D55/225—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads
- F16D55/226—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads in which the common actuating member is moved axially, e.g. floating caliper disc brakes
- 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
- F16D2065/026—Braking members; Mounting thereof characterised by a particular outline shape of the braking member, e.g. footprint of friction lining
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
DISC BRAKE CALIPER SUPPORT
Abstract of the Disclosure The invention relates to means for securing a caliper slide pin to a torque plate in a disc brake assembly. The slide pin is carried by an axially extending bore provided to the torque plate. A draw key provided in a second bore intersecting the axially extending bore abuts the slide pin preventing movement thereof. The draw key is movable to a another position clearing the axially extending bore to permit withdrawal or insertion of the slide pin.
Abstract of the Disclosure The invention relates to means for securing a caliper slide pin to a torque plate in a disc brake assembly. The slide pin is carried by an axially extending bore provided to the torque plate. A draw key provided in a second bore intersecting the axially extending bore abuts the slide pin preventing movement thereof. The draw key is movable to a another position clearing the axially extending bore to permit withdrawal or insertion of the slide pin.
Description
DISC BRAKE CALIPER SIJPPORT
Fi~ld of the Invention The preserlt inYerlt:ion relate~ to~ a di~c brake assembly ~nd more specifically, 5 to improved mean~ for slidably ms)untirlg a caliper i~: a disc brake assembly.
The preseQt invcnt:ion is particularly applicable to a di~c brake as~embly whic~ elud¢~ a ro~or or di~c mou~ted~ for rotat:ion with a vehlcle wheel - 10 and: a floating caliper str~ddling the periphery of the rotor. The caliper is~ usually mounted on a suppo~t plate by means permitting movement o the~ caliper in an axial d:irection relative::eo ~he eorque~ plate and rotor.: Brake pad~ are carri~d by the calip~r~ ~o~l oppo ite ~i:de~ of the 15 rotor and: are movable: into-~eontact with- oppoæitely:
~di~posed friction brak:e~urfaces of ~the rotor by means of a ~uitabl~-actuating m~chanism:~hich~i~ u~ually dri~en by a ~luid motor. In a~ ating caliper di c brake:, ~ach riction pad i~ located i~termediate one depend.i~g l~g or 20 :wa~l of the ca~ip~ and~ the adjaee~t fric~ion surfac~ of th~ rotor. The ~etuati~g mechani~m is usuaLly carried by a depending:wall~or leg~o~ the caliper~and serv:e~ to move the adjacent friction pad axially into~contac~ wi~h the ro~ort the reaction force o~he contact serving to draw the other leg of the caliper and:th~ other friction pad into contact with-the oppo2ite surface of th~ rotor.
~ 3 ~ L~L~ L~LL ~5_~E5 Disc b~ke assemblies have bee~ provided with calipers mounted for ~ :
~'.
" ; .
, ~ :
.
.
~7~3 sliding movement on axially oriented rods and pin-like elements carriPd by a support or torque plate rigidly secured to a vehicle axle. Examples of such prior art arrangements may be found in U.S. Patent Nos. 3,388,774, 3,893,546 and 4,093,043.
Although va~ious possibilities exist for slidably mounting a caliper to a torque plate, many of these are beset with problem~ involving means for satisfactorily ~ecuring the slide pins or rods to the torqu~ plate while permitting ~ccess to the brake assembly for maintenance puspose~ a~ for example, withdrawing and replaci~g the friction pads. The present invention provide3 a simple, economical m~an~ for securing a caliper ~lide pin to a torque plate which prevents accidental displacement of th~ slide pin while providing for ea~e of aqsembly and di~as~embly.
The present invention pro~ides improved means for ~lidably mou~ting a caliper to a support in a disc brake compri~ing a bore extending axially through the ~upport, a ~econd bore intersecting the first bore, a slide pin carried in the fir~t bore with it3 ends projecting thercfrom, the caliper having a pair of axially 3paced bos~es with each boss including a bore 91idably receiving one~of the projecti~g ends of the ~lide pi~ and a draw key in:the second bore. The draw key i~ movable in the second bore to a fir~t position wherei~ the draw key clears said fi~st bore to permit axial mo~em~nt of the slide pin in the first bore and to a second po~ition partly witbin said first bore thereby preventing axial movement of the ~lid~ pin relative to the first bore. Mean~ for Iocking the draw key in the 8 econd po~ition is ~l~o provided.
In the preferred embodiment, the slide pin is undercut by a groove extending circumferentially around the slide pin and ~he draw key is rece~sed int~rmediate it~,end~ aDd threaded a~ one end projecting outward of :~7~0~3 the ~cond bore. The recess of the draw key is drawn into abutment with the undercut grooved portion of the slide pin when said draw key is moved to the aforesaid second position and a nut threaded to the projecting end 5 of said draw key is tightened against the support to lock the recessed portion of the draw key in the second position with the draw key recess abutting the undercut portion of said slide pin. The advantages offered by tbe present invention will become apparent from the following description of the embodiment ~bown in the accompanying drawingg .
In the drawings wherein like reference numeral refer to li~e parts:
Figure 1 is a side elevation view of a di~c brake incorporating the precent inventio~;
Figure 2 is a partial front v iew of ~he diqc brake of Figure l;
Figure 3 i5 a sectional view taken along lines 3-3 of Figure 2;
Figure 4 is a section~l view similar to Figure 3;
Figure 5 is of a draw key utilized in the presen~ invention; and Figur~ 6 i~ a perspective view o~ a ~Lide pin utilized in the present inv~ntion.
Description o b~ otion With reference to the~drawings, Figures 1 and 2 ~how a disc brake a~sembly~generally designa~e~ by the numeral 10. The assembly 10 includes a sliding or "floating" floating caliper 12 mounted:by means of circumferentially spaced, a~ially aligned pairs of ears 14 and 15, and 16 and 17 on slide pi~s 19 and 20. The 31ide pin~ 19 and 20 are reQpectiveLy mounted in axially extending bores 21, 22 respectlvely provided to bosses 24, 25 at the radially outer extremities of circumferentially spaced radially ex~ending arms 26 and ~:
~7~
28 of the brake supporting tor~ue plate or spider 30.
The torque plate 30 is provided with a circuLar array of apertures 31 which receive a plurality of bolts not showD
which, in turn, secure the support or torque plate 30 to a flange welded to a vehicle axle 32. The torque plate 30 will of course be welded directly to the axle 32.
rotor 34 having axially spaced, oppositely disposed friction braking surfaces 35 and 36 is secured for rotation with a wbeel hub (not shown) carried by the vehicle axle 32 adjacent to the brake as~embly 10.
The caliper 12 is a cast metal component comprised of a leg 40 extending radially inward adjacent the friction surface 36 of rotor 34, an oppositely dispo~ed leg or wall 41 adjacent ~o friction surace 35 of rotor 34 and a bridge 42 straddling the periphery of rotor 34 and joining the leg 40 to the wall 41. The wall 41 is formed ~ith a generally cylindrical housing 44 having a bore 45 sIidably mounting a piston 4~ formed integrally with a load applying plate 470 The contour of the load applying plate 47 is similar to the contour of the backing plate of ~riction pad 52 and moves the pad 52 axially into contact wioth the r~tor surface 35 in response to ac~uation of the brake assembly. The pis~on 45 and load plate 47 may be moved~by suitable hydraulic or mechanical actuating means, not shown. The b~idge 42 of caliper 12 i9 provided with an aperture 46 partially bounded by circumferentially spaced axiaIly extending, radially converging edge~ 50 and 51 which ~upport a pair of frict~o~ pads 52 a~d 54q The friction pad~, 523 54 ar~ ~upported in operative position between the oppo~itely disposed friction- urfaces 35, 36 of the rotor 34 and the depending leg 40 and wall 41 o~ caliper 12 by means of radially extending tabg 55, 56 integrally formed as extensions of the backing plates o~ friction pad~ 52, 54. The circumferentially spaced edge~ of the friction pad tabs 55, 56 slidably engage the ed~es 50, Sl of caliper aperature 46 and thereby support the friction pads 52, 54.
The caliper 12 and friction pads 52, 54 are in turn ~lidably supported by slide pins 19 and 20 projecting Erom tbe bores 21, 22 of the torque plate bosses 24, 25.
As best ~hown by Figure 2, the slide pin 19 is supported within the cylindrical bore 21 extending axially through the boss 24 provided at the radially outer extremity of the torque plate arm 26. The caliper 12 is provided with a pair of a~ially ~paced bo~ses 14, 15, each of which includes a cylindrical bore slidably receiving one end of the ~lide pin 19 projecting from the bore 21 of torque plate bos~ 240 The slide pin 19 is stepped to a smaller diameter portion 17 forming the bottom of a groove disposed circumferentially around the slide pin 19. The diam~terof the ends of the ~lide pin 19 is about 25.2 millime~ers and the portion 17 i~ undercut ~o a diameter of about 24 millimeter~.
The slide pin l9 is secured within the ~orque plate bos~ 24 by mean~ of a draw key 60 poqitioned within a second bore 58 p~ovided~to th~ ~orque plate boss 24.
As~be~ shown by Figure 1, the axis-of ~he second bore 58 provided to ~orque pla~e boss 24 and the axis of the second bore 59 provided to torque plate boYs 25 are re~pectively n~rmal eo but laterally displaced from the axe~ of th~ ~lide pin bores 21, 22 of torque : plate bos~es 24 and 25. The s~cond bore 58 a~ shown by ~he section view of Figure 3 i~ la~erally off~et rom the slide pin bore 21 and inte~sects only a m rginal portion or sector of the slide pin bore 21~ Thi~ arrangement permits the draw ke:y~ 60, 6I to b~ respectively moved in their re~pective bore~, 58, 59 to a fir~ position where the draw keys clear or do not occupy any portion of tbeir re~pective iDterSeCting ~lide pin bores 21, 22 thereby 35 permitting axial movement of the slide pins 19l 20 in the bores 21, 22, re~pectively to a second position where the draw kcy 60. 61 are located partly within their ~7 respective intersecting slide pin bore~ 21,22, thereby preveDting axial movement of the slide pins 19 20 within their bores 21, 22~ The second bores 58, 59 are open a~
both ends through the torque plate bosses 24, 25 to prevent moisture or dirt from accumulating in the bores 21, 2~.
The draw key 60 as 3hown by Figure 5, i~ an elongate pin or rod having a shaDk 62 and an externally threaded bead 63 of slightly larger diameter than the shank 62. The sha~ is r~cessed or undercutat 64 and a groove 67 i~ provided to the head 63. The reces~ 64 is provided laterally throu~h the shank 6~ or alignment with th~ slide pin bore 21 and the groove 67 extends dramatically across the top or projecting end surface of head 63 and parallel the base of th~ recess 64 to vi3ibly indicate the orientation of the rece~s 64 within the second bore 58.
The draw key~ 60 9 61 are axially removable against the force of a biasing spring 68 seated against a shoulder formed by an u~dercut at the open end of the bores 58, S9~ Springs 68 bias again~t the under surace of a washer 66. A nut 69 is threaded to the head 63 of draw key 60.
The draw key 60 may be axially moved within the bore 58. A~ shown in Figure 4, with the lock nut 69 moved to a po~ition adjacent tbe end of ~he threaded head 63, th~ draw key 60 may be axially moved inward again~
th~ force of biasing ~pring 68 to a firs~ position where the recess 64 is aligned with the slide pin bore 21 thereby cleari~g tbe bore 21 and permitting axial ~ovement of the ~lide pin 19 within the bore 21 of torque plate bar 24 as well as the bores provided to the axially spaced bosses L4, 15 of the caliper 12. With the draw key 60 in this positio~ the slide pin 19 may thus be inserted or withdraw~ from the caliper and torque plate as~embly.
~7~
Once the slide pin 19 is inserted within the slide pin bore 21 of tor~ue plate boss 24 and the axially aligned bores provided to ~he spaced bosses 14, 15 oE the arms 26, 28 of caliper 12, the draw key 60 is drawn axially outwardly to a second po~itioD where, as shown by Figure 3, the tapered portion of the recess 64 engages the undercut smaller diameter portion 17 of the slide pin 19 thereby disposing a portion of the draw key 63 within the slide pin bore 21 and abutting the undercut surface 17 of the slide pin 19 and preventing axial movement of 10 the slide pin relative to the slide pin bore 21 of torque plate boss 24. The nut 69 is then threaded down into abutting engagement with the exterior ~urface of the torque plate boss 24 to lock the draw key in poRition preventin~ axial movement of the slide pin 19 within the bore 21.
Slide pin 20 and draw key 61, respectively, are identical to the slide pi~ 19 and draw key 60 . The 1ide pin 20 is secured within the cylindrical bore provided to bos~ 25 by means of the draw key 61 disposed within the second bore 59 provided to boss 25. The second bore 59 intersects the cylindrical ~lide pi~ bore provided to bo3s 25 and enable~ the draw key 61 to either clear the bore fQr removal and/or insertion of the slide pin 20 or to abut again3t the ~lide pin 20 and thereby prevent axial moveme~t of the slide pin within bore : provided to caliper bos~ 25 i~ the ~ame manner as previou~ly described for the draw k~y 60 and slide pin 19 .
Although the slide pins 19 and ~0 and the draw keys 60, 61 are respectively undercut at 17 and recessed a~: 64, in the preferred embodiment described above, the invention would function in the same manner if only one element were recessed. For example, if only the slide pin were rece~sed, then the draw key could be provided of a length to extend into the ~lide pin reces~ and capable of being withdr~wn from that rec~s~ and the slide pin .~ ~ 7~ 3 bore when it is dssired to withdraw or insert the slide pin~ If only the draw key were recessed, then the draw key could be de~igned ~o enable the rece~3 to abut the cylindrical qurface of the gLide pin in one po~ition and S to clear the qlide pin bore wh.en it is desired to withdraw or replace ~he slide pin.
The invention thu~ provides a ~imple economical means for securing a ~lide pin to a disc brake support or torque plate which readily permit removal and replacement of the slide pin.
The inve~tion may al~o be embodied in other specific forms witbout departing from the spirit or the es~ential characteristics thereof. The foregoing de~cription i~ therefore to be con~idered a~ illustrative and ~onre~trictive, the ~cope of the invention being defiIled by the appended claim~ and ~11 change~ which come within the meaning and ~ange of equivalency of the claims are therefore intended:to be embraced thereby.
Fi~ld of the Invention The preserlt inYerlt:ion relate~ to~ a di~c brake assembly ~nd more specifically, 5 to improved mean~ for slidably ms)untirlg a caliper i~: a disc brake assembly.
The preseQt invcnt:ion is particularly applicable to a di~c brake as~embly whic~ elud¢~ a ro~or or di~c mou~ted~ for rotat:ion with a vehlcle wheel - 10 and: a floating caliper str~ddling the periphery of the rotor. The caliper is~ usually mounted on a suppo~t plate by means permitting movement o the~ caliper in an axial d:irection relative::eo ~he eorque~ plate and rotor.: Brake pad~ are carri~d by the calip~r~ ~o~l oppo ite ~i:de~ of the 15 rotor and: are movable: into-~eontact with- oppoæitely:
~di~posed friction brak:e~urfaces of ~the rotor by means of a ~uitabl~-actuating m~chanism:~hich~i~ u~ually dri~en by a ~luid motor. In a~ ating caliper di c brake:, ~ach riction pad i~ located i~termediate one depend.i~g l~g or 20 :wa~l of the ca~ip~ and~ the adjaee~t fric~ion surfac~ of th~ rotor. The ~etuati~g mechani~m is usuaLly carried by a depending:wall~or leg~o~ the caliper~and serv:e~ to move the adjacent friction pad axially into~contac~ wi~h the ro~ort the reaction force o~he contact serving to draw the other leg of the caliper and:th~ other friction pad into contact with-the oppo2ite surface of th~ rotor.
~ 3 ~ L~L~ L~LL ~5_~E5 Disc b~ke assemblies have bee~ provided with calipers mounted for ~ :
~'.
" ; .
, ~ :
.
.
~7~3 sliding movement on axially oriented rods and pin-like elements carriPd by a support or torque plate rigidly secured to a vehicle axle. Examples of such prior art arrangements may be found in U.S. Patent Nos. 3,388,774, 3,893,546 and 4,093,043.
Although va~ious possibilities exist for slidably mounting a caliper to a torque plate, many of these are beset with problem~ involving means for satisfactorily ~ecuring the slide pins or rods to the torqu~ plate while permitting ~ccess to the brake assembly for maintenance puspose~ a~ for example, withdrawing and replaci~g the friction pads. The present invention provide3 a simple, economical m~an~ for securing a caliper ~lide pin to a torque plate which prevents accidental displacement of th~ slide pin while providing for ea~e of aqsembly and di~as~embly.
The present invention pro~ides improved means for ~lidably mou~ting a caliper to a support in a disc brake compri~ing a bore extending axially through the ~upport, a ~econd bore intersecting the first bore, a slide pin carried in the fir~t bore with it3 ends projecting thercfrom, the caliper having a pair of axially 3paced bos~es with each boss including a bore 91idably receiving one~of the projecti~g ends of the ~lide pi~ and a draw key in:the second bore. The draw key i~ movable in the second bore to a fir~t position wherei~ the draw key clears said fi~st bore to permit axial mo~em~nt of the slide pin in the first bore and to a second po~ition partly witbin said first bore thereby preventing axial movement of the ~lid~ pin relative to the first bore. Mean~ for Iocking the draw key in the 8 econd po~ition is ~l~o provided.
In the preferred embodiment, the slide pin is undercut by a groove extending circumferentially around the slide pin and ~he draw key is rece~sed int~rmediate it~,end~ aDd threaded a~ one end projecting outward of :~7~0~3 the ~cond bore. The recess of the draw key is drawn into abutment with the undercut grooved portion of the slide pin when said draw key is moved to the aforesaid second position and a nut threaded to the projecting end 5 of said draw key is tightened against the support to lock the recessed portion of the draw key in the second position with the draw key recess abutting the undercut portion of said slide pin. The advantages offered by tbe present invention will become apparent from the following description of the embodiment ~bown in the accompanying drawingg .
In the drawings wherein like reference numeral refer to li~e parts:
Figure 1 is a side elevation view of a di~c brake incorporating the precent inventio~;
Figure 2 is a partial front v iew of ~he diqc brake of Figure l;
Figure 3 i5 a sectional view taken along lines 3-3 of Figure 2;
Figure 4 is a section~l view similar to Figure 3;
Figure 5 is of a draw key utilized in the presen~ invention; and Figur~ 6 i~ a perspective view o~ a ~Lide pin utilized in the present inv~ntion.
Description o b~ otion With reference to the~drawings, Figures 1 and 2 ~how a disc brake a~sembly~generally designa~e~ by the numeral 10. The assembly 10 includes a sliding or "floating" floating caliper 12 mounted:by means of circumferentially spaced, a~ially aligned pairs of ears 14 and 15, and 16 and 17 on slide pi~s 19 and 20. The 31ide pin~ 19 and 20 are reQpectiveLy mounted in axially extending bores 21, 22 respectlvely provided to bosses 24, 25 at the radially outer extremities of circumferentially spaced radially ex~ending arms 26 and ~:
~7~
28 of the brake supporting tor~ue plate or spider 30.
The torque plate 30 is provided with a circuLar array of apertures 31 which receive a plurality of bolts not showD
which, in turn, secure the support or torque plate 30 to a flange welded to a vehicle axle 32. The torque plate 30 will of course be welded directly to the axle 32.
rotor 34 having axially spaced, oppositely disposed friction braking surfaces 35 and 36 is secured for rotation with a wbeel hub (not shown) carried by the vehicle axle 32 adjacent to the brake as~embly 10.
The caliper 12 is a cast metal component comprised of a leg 40 extending radially inward adjacent the friction surface 36 of rotor 34, an oppositely dispo~ed leg or wall 41 adjacent ~o friction surace 35 of rotor 34 and a bridge 42 straddling the periphery of rotor 34 and joining the leg 40 to the wall 41. The wall 41 is formed ~ith a generally cylindrical housing 44 having a bore 45 sIidably mounting a piston 4~ formed integrally with a load applying plate 470 The contour of the load applying plate 47 is similar to the contour of the backing plate of ~riction pad 52 and moves the pad 52 axially into contact wioth the r~tor surface 35 in response to ac~uation of the brake assembly. The pis~on 45 and load plate 47 may be moved~by suitable hydraulic or mechanical actuating means, not shown. The b~idge 42 of caliper 12 i9 provided with an aperture 46 partially bounded by circumferentially spaced axiaIly extending, radially converging edge~ 50 and 51 which ~upport a pair of frict~o~ pads 52 a~d 54q The friction pad~, 523 54 ar~ ~upported in operative position between the oppo~itely disposed friction- urfaces 35, 36 of the rotor 34 and the depending leg 40 and wall 41 o~ caliper 12 by means of radially extending tabg 55, 56 integrally formed as extensions of the backing plates o~ friction pad~ 52, 54. The circumferentially spaced edge~ of the friction pad tabs 55, 56 slidably engage the ed~es 50, Sl of caliper aperature 46 and thereby support the friction pads 52, 54.
The caliper 12 and friction pads 52, 54 are in turn ~lidably supported by slide pins 19 and 20 projecting Erom tbe bores 21, 22 of the torque plate bosses 24, 25.
As best ~hown by Figure 2, the slide pin 19 is supported within the cylindrical bore 21 extending axially through the boss 24 provided at the radially outer extremity of the torque plate arm 26. The caliper 12 is provided with a pair of a~ially ~paced bo~ses 14, 15, each of which includes a cylindrical bore slidably receiving one end of the ~lide pin 19 projecting from the bore 21 of torque plate bos~ 240 The slide pin 19 is stepped to a smaller diameter portion 17 forming the bottom of a groove disposed circumferentially around the slide pin 19. The diam~terof the ends of the ~lide pin 19 is about 25.2 millime~ers and the portion 17 i~ undercut ~o a diameter of about 24 millimeter~.
The slide pin l9 is secured within the ~orque plate bos~ 24 by mean~ of a draw key 60 poqitioned within a second bore 58 p~ovided~to th~ ~orque plate boss 24.
As~be~ shown by Figure 1, the axis-of ~he second bore 58 provided to ~orque pla~e boss 24 and the axis of the second bore 59 provided to torque plate boYs 25 are re~pectively n~rmal eo but laterally displaced from the axe~ of th~ ~lide pin bores 21, 22 of torque : plate bos~es 24 and 25. The s~cond bore 58 a~ shown by ~he section view of Figure 3 i~ la~erally off~et rom the slide pin bore 21 and inte~sects only a m rginal portion or sector of the slide pin bore 21~ Thi~ arrangement permits the draw ke:y~ 60, 6I to b~ respectively moved in their re~pective bore~, 58, 59 to a fir~ position where the draw keys clear or do not occupy any portion of tbeir re~pective iDterSeCting ~lide pin bores 21, 22 thereby 35 permitting axial movement of the slide pins 19l 20 in the bores 21, 22, re~pectively to a second position where the draw kcy 60. 61 are located partly within their ~7 respective intersecting slide pin bore~ 21,22, thereby preveDting axial movement of the slide pins 19 20 within their bores 21, 22~ The second bores 58, 59 are open a~
both ends through the torque plate bosses 24, 25 to prevent moisture or dirt from accumulating in the bores 21, 2~.
The draw key 60 as 3hown by Figure 5, i~ an elongate pin or rod having a shaDk 62 and an externally threaded bead 63 of slightly larger diameter than the shank 62. The sha~ is r~cessed or undercutat 64 and a groove 67 i~ provided to the head 63. The reces~ 64 is provided laterally throu~h the shank 6~ or alignment with th~ slide pin bore 21 and the groove 67 extends dramatically across the top or projecting end surface of head 63 and parallel the base of th~ recess 64 to vi3ibly indicate the orientation of the rece~s 64 within the second bore 58.
The draw key~ 60 9 61 are axially removable against the force of a biasing spring 68 seated against a shoulder formed by an u~dercut at the open end of the bores 58, S9~ Springs 68 bias again~t the under surace of a washer 66. A nut 69 is threaded to the head 63 of draw key 60.
The draw key 60 may be axially moved within the bore 58. A~ shown in Figure 4, with the lock nut 69 moved to a po~ition adjacent tbe end of ~he threaded head 63, th~ draw key 60 may be axially moved inward again~
th~ force of biasing ~pring 68 to a firs~ position where the recess 64 is aligned with the slide pin bore 21 thereby cleari~g tbe bore 21 and permitting axial ~ovement of the ~lide pin 19 within the bore 21 of torque plate bar 24 as well as the bores provided to the axially spaced bosses L4, 15 of the caliper 12. With the draw key 60 in this positio~ the slide pin 19 may thus be inserted or withdraw~ from the caliper and torque plate as~embly.
~7~
Once the slide pin 19 is inserted within the slide pin bore 21 of tor~ue plate boss 24 and the axially aligned bores provided to ~he spaced bosses 14, 15 oE the arms 26, 28 of caliper 12, the draw key 60 is drawn axially outwardly to a second po~itioD where, as shown by Figure 3, the tapered portion of the recess 64 engages the undercut smaller diameter portion 17 of the slide pin 19 thereby disposing a portion of the draw key 63 within the slide pin bore 21 and abutting the undercut surface 17 of the slide pin 19 and preventing axial movement of 10 the slide pin relative to the slide pin bore 21 of torque plate boss 24. The nut 69 is then threaded down into abutting engagement with the exterior ~urface of the torque plate boss 24 to lock the draw key in poRition preventin~ axial movement of the slide pin 19 within the bore 21.
Slide pin 20 and draw key 61, respectively, are identical to the slide pi~ 19 and draw key 60 . The 1ide pin 20 is secured within the cylindrical bore provided to bos~ 25 by means of the draw key 61 disposed within the second bore 59 provided to boss 25. The second bore 59 intersects the cylindrical ~lide pi~ bore provided to bo3s 25 and enable~ the draw key 61 to either clear the bore fQr removal and/or insertion of the slide pin 20 or to abut again3t the ~lide pin 20 and thereby prevent axial moveme~t of the slide pin within bore : provided to caliper bos~ 25 i~ the ~ame manner as previou~ly described for the draw k~y 60 and slide pin 19 .
Although the slide pins 19 and ~0 and the draw keys 60, 61 are respectively undercut at 17 and recessed a~: 64, in the preferred embodiment described above, the invention would function in the same manner if only one element were recessed. For example, if only the slide pin were rece~sed, then the draw key could be provided of a length to extend into the ~lide pin reces~ and capable of being withdr~wn from that rec~s~ and the slide pin .~ ~ 7~ 3 bore when it is dssired to withdraw or insert the slide pin~ If only the draw key were recessed, then the draw key could be de~igned ~o enable the rece~3 to abut the cylindrical qurface of the gLide pin in one po~ition and S to clear the qlide pin bore wh.en it is desired to withdraw or replace ~he slide pin.
The invention thu~ provides a ~imple economical means for securing a ~lide pin to a disc brake support or torque plate which readily permit removal and replacement of the slide pin.
The inve~tion may al~o be embodied in other specific forms witbout departing from the spirit or the es~ential characteristics thereof. The foregoing de~cription i~ therefore to be con~idered a~ illustrative and ~onre~trictive, the ~cope of the invention being defiIled by the appended claim~ and ~11 change~ which come within the meaning and ~ange of equivalency of the claims are therefore intended:to be embraced thereby.
Claims (13)
1. In a disc brake for a vehicle including a support and a caliper slidably traversing said support during operation of said brake, means for slidably mounting said caliper comprising a first bore extending axially through said support, a second bore intersecting said first bore, a slide pin carried in said first bore with its ends projecting therefrom, said caliper having a pair of axially spaced bosses with each boss including a bore slidably receiving one of said projecting ends of said pin and a draw key in said second bore, said draw key being movable in said second bore to a first position wherein said draw key clears said first bore to permit axial movement of said slide pin in said first bore and to a second position partly within said first bore thereby preventing axial movement of said slide pin relative to said first bore, and means for locking said draw key in said second position.
2. The disc brake defined by Claim 1 wherein said draw key is movable into abutment with said slide pin in said second position.
3. The disc brake defined by Claim 1 wherein said draw key is recessed and i movable to align said recess with said first bore in said first position.
4. The disc brake defined by Claim 1 wherein said draw key is recessed intermediate its ends and one of said ends is threaded and projects outward of said second bore and a nut threaded to said draw key and abutting said support to lock said draw key in said second position with said recess drawn into abutment with said slide pin.
5. The disc brake defined by Claim 1 wherein said slide pin is recessed and said draw key is movable into said recess in said second position.
6. The disc brake defined by Claim 1 wherein said draw key is biased to said second position.
7. A disc brake comprising a fixed support member having a pair of circumferentially spaced arms, a caliper and means slidably mounting said caliper on said support member for transverse movement relative to said support, said mounting means including a bore extending axially through each of said arms, a second bore in each respective arm intersecting said axially extending bore in that arm, a pair of pins, each said pin being undercut intermediate its ends and carried in one of said axially extending bores with said undercut aligned with said second bore and with its ends projecting out of said axially extending bore and a pair of draw keys, each said draw key positioned in one of said second bores and having a recess intermediate its ends of a depth adequate to clear the diameter of one of said pins and movable to a first position wherein said draw key recess is aligned with said first bore to permit insertion and removal of said pin in said bore and to a second position wherein said draw key is positioned in said pin recess to locate said pin relative to said second bore and to retain said pin against axial movement in said first bore and means locking said draw key in said second position.
8. The disc brake defined by Claim 7 including means biasing said draw key to said second position.
9. The disc brake defined by Claim 7 wherein said undercut in each respective pin is a groove extending circumferentially around said pin.
10. Disc brake defined by Claim 9 wherein each said groove is located at the midpoint of each respective pin.
11. In a brake, a rotor having a pair of axially spaced, friction surfaces, a pair of friction elements, one of said elements being disposed adjacent each of said friction faces, a support member mounted adjacent one of said friction faces, said support member having a pair of circumferentially spaced arms defining a recess therebetween, a caliper straddling said rotor and including elements engaging each of said friction elements for urging the latter into braking engagement with each said adjacent friction face when a brake application is effected, at least one of the friction elements being secured to said straddling member, means slidably mounting said straddling member on said support member for transverse movement relative to said rotor, said slidably mounting means including a bore extending axially through each of said arms, a second bore in each respective arm intersecting said axially extending bore in that arm, a pair of pins, each said pin carried in one of said axially extending bores with its ends projecting therefrom, said caliper having circumferentially spaced bores slidably receiving said projecting ends of said pins, and a draw key positioned in each of said second bores, each said draw key abutting one of said pins to retain said pin against axial movement in said first bore, and having a recess and being movable in said second bore to a position where said recess permits axial movement of said pin in said first bore and means for locking said draw key abutting said pin.
12. The disc brake defined by Claim 1 wherein said draw key comprises an elongate body having a shank and a head, a recess provided laterally through a portion of said shank and means on said head aligned with said recess to indicate the orientation of said recess within said bore.
13. The disc brake defined by Claim 12 wherein said means for said head is a groove extending diametrically across the projecting end surface of said head parallel to the base of said recess.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US21200280A | 1980-12-01 | 1980-12-01 | |
| US212,002 | 1980-12-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1171003A true CA1171003A (en) | 1984-07-17 |
Family
ID=22789150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000388876A Expired CA1171003A (en) | 1980-12-01 | 1981-10-27 | Disc brake caliper support |
Country Status (12)
| Country | Link |
|---|---|
| JP (1) | JPS57120739A (en) |
| AU (1) | AU550581B2 (en) |
| BR (1) | BR8107791A (en) |
| CA (1) | CA1171003A (en) |
| CH (1) | CH658301A5 (en) |
| DE (1) | DE3146790A1 (en) |
| FR (1) | FR2495250A1 (en) |
| GB (2) | GB2088499B (en) |
| HU (1) | HU188718B (en) |
| IT (1) | IT1142993B (en) |
| MX (1) | MX155185A (en) |
| SE (1) | SE8107094L (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9435391B2 (en) | 2012-07-13 | 2016-09-06 | Knorr-Bremse Systeme Fuer Nutzfahrzeuge Gmbh | Disc brake for a commercial vehicle |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3302485C2 (en) * | 1983-01-26 | 1989-12-14 | Mannesmann AG, 4000 Düsseldorf | landing gear |
| US4796741A (en) * | 1987-12-11 | 1989-01-10 | Dana Corporation | Synchronizer blocker pin mounting structure |
| GB2229409B (en) * | 1989-03-21 | 1993-03-31 | Dana Corp | Steerable axle assembly with preloaded kingpin drawkeys |
| FR2649062A1 (en) * | 1989-06-29 | 1991-01-04 | Irigny Mecanique | Device for connecting a ball joint to a motor vehicle steering linkage coupling bar |
| DE4106096C1 (en) * | 1991-02-27 | 1992-10-15 | Jean Walterscheid Gmbh, 5204 Lohmar, De | |
| BR9104817A (en) * | 1991-11-05 | 1993-05-11 | Petroleo Brasileiro Sa | MECHANISM OF EXCHANGE OF OPERATOR POST-GUIDE BY REMOTE OPERATION VEHICLE |
| DE29607541U1 (en) * | 1996-04-26 | 1996-07-11 | Gkn Walterscheid Gmbh, 53797 Lohmar | Securing element for a connection between a shaft and a hub |
| FR2812392B1 (en) * | 2000-07-28 | 2002-12-13 | Inst Francais Du Petrole | OPTICAL MOTOR FOR TESTING, PARTICULARLY FOR MEASUREMENTS ON COMBUSTION PARAMETERS |
| US20080087507A1 (en) * | 2006-10-13 | 2008-04-17 | Kelsey-Hayes Company | Disc brake assembly and method of assembly |
| DE102009027473B4 (en) * | 2009-07-06 | 2021-08-19 | Ford Global Technologies, Llc | Clamp connection |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB567617A (en) * | 1943-05-07 | 1945-02-23 | Robert Mcgowan | An improved apparatus for dancing figures and the like |
| FR982977A (en) * | 1943-08-11 | 1951-06-18 | Goupille Cannelee L G C | Advanced assembly key |
| GB717415A (en) * | 1951-06-15 | 1954-10-27 | Campbell & Isherwood Ltd | Improvements in or relating to couplings particularly for chain conveyors |
| BE534865A (en) * | 1954-01-18 | |||
| GB854846A (en) * | 1956-03-16 | 1960-11-23 | Louis Camillis | Improvements relating to cotterpins for bicycle cranks |
| FR1362688A (en) * | 1963-04-26 | 1964-06-05 | Citroen Sa Andre | Improvements to disc brakes |
| GB1128404A (en) * | 1966-04-07 | 1968-09-25 | Ml Aviation Co Ltd | Improvements relating to releasable fasteners |
| US3410371A (en) * | 1967-01-27 | 1968-11-12 | Bendix Corp | Support and adjusting means for disc brake caliper |
| GB1383743A (en) * | 1971-05-03 | 1974-02-12 | Arkana Ltd | Joining structural members |
| GB1524970A (en) * | 1976-07-15 | 1978-09-13 | Campbell Wilson M S | Retaining pins |
| GB1549046A (en) * | 1977-08-09 | 1979-08-01 | Hoy & Co Ltd Austin | Socketed boss having means for retaining a tool shank |
| DE2804977C2 (en) * | 1978-02-06 | 1986-07-10 | Alfred Teves Gmbh, 6000 Frankfurt | Floating caliper brakes, in particular for motor vehicles |
| DE2845275A1 (en) * | 1978-10-18 | 1980-04-30 | Teves Gmbh Alfred | FLOATING SADDLE DISC BRAKE |
| DE2917968C2 (en) * | 1979-05-04 | 1982-10-21 | Artur Dr.H.C. 7244 Waldachtal Fischer | Kit for assembling game models |
| IT1194852B (en) * | 1979-10-11 | 1988-09-28 | Ics Cidneo Spa | SEAT AND LID FOR TOILET TANKS |
-
1981
- 1981-10-27 CA CA000388876A patent/CA1171003A/en not_active Expired
- 1981-10-28 AU AU76918/81A patent/AU550581B2/en not_active Ceased
- 1981-11-05 GB GB8133354A patent/GB2088499B/en not_active Expired
- 1981-11-25 DE DE19813146790 patent/DE3146790A1/en not_active Withdrawn
- 1981-11-25 CH CH7552/81A patent/CH658301A5/en not_active IP Right Cessation
- 1981-11-26 IT IT49778/81A patent/IT1142993B/en active
- 1981-11-27 SE SE8107094A patent/SE8107094L/en not_active Application Discontinuation
- 1981-11-30 HU HU813587A patent/HU188718B/en unknown
- 1981-11-30 BR BR8107791A patent/BR8107791A/en unknown
- 1981-11-30 FR FR8122373A patent/FR2495250A1/en not_active Withdrawn
- 1981-11-30 JP JP56192667A patent/JPS57120739A/en active Pending
- 1981-12-01 MX MX190361A patent/MX155185A/en unknown
-
1984
- 1984-06-19 GB GB08415594A patent/GB2140515A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9435391B2 (en) | 2012-07-13 | 2016-09-06 | Knorr-Bremse Systeme Fuer Nutzfahrzeuge Gmbh | Disc brake for a commercial vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| BR8107791A (en) | 1982-08-31 |
| MX155185A (en) | 1988-02-01 |
| IT8149778A0 (en) | 1981-11-26 |
| SE8107094L (en) | 1982-06-02 |
| CH658301A5 (en) | 1986-10-31 |
| AU550581B2 (en) | 1986-03-27 |
| GB2088499A (en) | 1982-06-09 |
| GB2088499B (en) | 1985-08-07 |
| FR2495250A1 (en) | 1982-06-04 |
| IT1142993B (en) | 1986-10-15 |
| AU7691881A (en) | 1982-06-10 |
| GB8415594D0 (en) | 1984-07-25 |
| HU188718B (en) | 1986-05-28 |
| DE3146790A1 (en) | 1982-08-12 |
| JPS57120739A (en) | 1982-07-27 |
| GB2140515A (en) | 1984-11-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEC | Expiry (correction) | ||
| MKEX | Expiry |