GB2028940A - Disc Brake Assembly - Google Patents

Disc Brake Assembly Download PDF

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Publication number
GB2028940A
GB2028940A GB7928060A GB7928060A GB2028940A GB 2028940 A GB2028940 A GB 2028940A GB 7928060 A GB7928060 A GB 7928060A GB 7928060 A GB7928060 A GB 7928060A GB 2028940 A GB2028940 A GB 2028940A
Authority
GB
United Kingdom
Prior art keywords
pin
disc
caliper
brake assembly
disc brake
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB7928060A
Other versions
GB2028940B (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bendix Corp
Original Assignee
Bendix Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Bendix Corp filed Critical Bendix Corp
Publication of GB2028940A publication Critical patent/GB2028940A/en
Application granted granted Critical
Publication of GB2028940B publication Critical patent/GB2028940B/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
    • F16D55/02—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
    • F16D55/22—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads
    • F16D55/224—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members
    • F16D55/225—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads
    • F16D55/226—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads in which the common actuating member is moved axially, e.g. floating caliper disc brakes
    • F16D55/2265—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads in which the common actuating member is moved axially, e.g. floating caliper disc brakes the axial movement being guided by one or more pins engaging bores in the brake support or the brake housing
    • F16D55/227—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads in which the common actuating member is moved axially, e.g. floating caliper disc brakes the axial movement being guided by one or more pins engaging bores in the brake support or the brake housing by two or more pins
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/02—Braking members; Mounting thereof
    • F16D65/04—Bands, shoes or pads; Pivots or supporting members therefor
    • F16D65/092—Bands, shoes or pads; Pivots or supporting members therefor for axially-engaging brakes, e.g. disc brakes
    • 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
    • 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
    • F16D65/0979—Resilient means interposed between pads and supporting members or other brake parts not subjected to brake forces acting on the rear side of the pad or an element affixed thereto, e.g. spring clips securing the pad to the brake piston or caliper
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)

Abstract

A disc brake assembly (10) has a torque member (12) including a flange (26) extending axially over the periphery of disc (10) and having a bore (22) to receive a pin (28) for slidably supporting a caliper assembly (32). The pin (28) threadably engages the torque member (12) and extends on both sides of the disc (40) and there may be a further pin (30). On one side of the disc (40) the one pin (28) slidably engages the caliper assembly (32), while on the other side of the disc the one pin (28) slidably engages one (38) of a pair of brake pads (36,38). The one pin (28) co- operates with a resilient bushing (50) on the caliper assembly (32) to form a sliding connection therebetween and also co-operates with a resilient bushing (81) on the one brake pad (38) to form a sliding connection therebetween. An optional thermoplastic sleeve (52) may be disposed between the resilient bushing (50) on the caliper assembly (32) and the one pin (28). Braking torque is transmitted to member (12) via an abutment interface between caliper assembly (32) and flange (26) at (77). <IMAGE>

Description

SPECIFICATION Disc Brake Assembly The invention relates to a disc brake assembly.
In general a pin slider disc brake, such as illustrated in U.S. Patents 3,375,906 and 3,628,639, provides a pair of pins which extend from a torque member to slidably carry a caliper.
Each pin forms a slidable connection on both sides of the disc with the caliper so that the caliper requires a pair of coaxial openings for receiving each pin. Consequently, the caliper of the prior art pin slider disc brake includes a pair of radially outwardly extending flanges so as to form the pair of coaxial openings. As a result the outwardly extending flanges take up space so that the construction is not compatible with the small space available for many small cars, especially those cars with front wheel drive.
In addition, the pin slider disc brake of the prior art utilizes a resilient ring or grommet to form a sliding connection between the pair of pins and the caliper so that the metai pins slidably engage the resilient rings.
It is an object of the present invention to provide a pin slider disck brake which is compactly structured to fit between a small car frame and wheel assembly.
It is an additional object of the present invention to provide a disc brake assembly which accomodates manufacturing tolerances by providing an opening in the outer friction element to receive a pin in a pin slider disc brake.
Consequently, the invention proposes a disc brake assembly having a torque member which fixedly couples to a vehicle frame, a caliper slidably disposed relative to the torque member and extending over a portion of the periphery of the disc, a pair of brake pads which are movable into engagement with the disc, and at least one pin cooperating with the torque member and the caliper to form a slidable connection therebetween, characterized in that said torque member includes a flange extending axially over the periphery of the disc, said flange including a bore for receiving the one pin.
The invention will now be described, by way of example with reference to the accompanying drawings in which: Figure 1 is an end view of a disc brake assembly; Figure 2 is a top view of a disc brake assembly of Figure 1 with the portion along line 2-2 of Figure 1 being cut away; and Figure 3 is a cross-sectional view of Figure 1 taken along line 3-3 of Figure 1.
In the figures, a disc brake assembly 10 includes a torque member 12 which is secured to a non-rotatable portion of a frame 14 via bolts 1 6.
The torque member is substantially U-shaped to form a pair of radially extending arms 18 and 20.
The arms form bores at 22 and 24 and the left arm 18 includes an axially extending flange 26; however, it is possible to also provide an axially extending flange for the right arm 20. The bore 22 is disposed in flange 26 to receive a pin 28 while the bore 24 receives a pin 30. A caliper assembly 32 is slidably carried by the pins and a hydraulic actuator 34 carried by the caliper assembly 32 cooperates with a pair of brake pads 36 and 38 to urge the latter into frictional engagement with a disc or rotor 40.
Turning to Figure 2, the caliper assembly 32 includes a pair of radially extending flanges at 42 and 44 which form openings 46 and 48. Viewing the left radial flange 42, as the right flange 44 is constructed similarly, the opening 46 receives a resilient bushing 50, such as a rubber grommet, and the pin 28 may optionally carry a thermoplastic sleeve 52 to enhance sliding with the resilient bushing 50. The thermo-plastic sleeve 52 extends through an opening on the resilient bushing 50 and cooperates with the latter to form a sliding connection between the pin 28 and the caliper 32.
The pin 28 forms a head 54 and an adjoining recess 56 to receive the thermo-plastic sleeve 52.
A threaded portion of the pin 28 at 58 is engageable with a threaded portion of the bore 22 at 60. In addition, a second portion 62 of the pin 28 forms a close fit with a second portion 64 of the bore 22. A small clearance between portions 62 and 64 is provided to accommodate manufacturing tolerances upon insertion of the pin 28 into the bore 22.
The inner brake pad 36 includes a backing plate 66 which fits within the opening formed by the U-shaped torque member 12. Consequently, braking torque developed by the inner brake pad 36 is transmitted directly to the torque member 12. Moreover, the inner brake pad 36 reieasably carries s spring 68 to retain the inner brake pad in abutment with the underside of the caliper assembly via tabs 67 and 69 extending from the backing plate 66 so as to eliminate rattle generated by the inner brake pad. The outer brake pad 38 also includes a backing plate 70 which is formed with projections 72. The projections extend into apertures 74 which are provided on a radially inwardly extending leg 76 of the caliper assembly 32.As a result braking torque developed by the outer brake pad 38 is transmitted to the caliper assembly 32 which in turn transmits braking torque to the axially extending flange 26 via an abutment interface between the caliper assembly and the axially extending flange at 77. Consequently, substantially no braking torque is tranmitted to the pins 28 and 30, even though the resilient bushings 50, 81, and 84 may be deformed during braking. A pair of radially outwardly extending ears at 78 and 80 on the friction element 38 carry the resilient bushings 81 and 84 within openings 83 and 85 for receiving the pins 28 and 30, respectively. The resilient bushings form a spacing between the pin and the wall of the openings 83 to permit slight movement of the brake pad 38 without transferring any torque to the pin portion 62.The opening on the bushing 81 or the opening on the bushing 84, or both, may be elliptical to accommodate manufacturing eccentricities between the pins 28 and 30. The outer brake shoe pad releasably couples to a spring 82 for retaining the outer brake shoe in abutment with the radially inwardly extending leg 76 of the caliper.
If the disc or rotor 40 is rotating in a reverse direction, such as when a vehicle is backing up, the torque member 12 includes a second abutment interface at 79 with the caliper assembly 32 to absorb braking torque generated through the caliper assembly during braking. The abutment interface at 77 is partially formed by at least two projections on the axially extending flange 26 while the abutment interface at 79 is formed by only one projection on the arm 20 as more braking torque will be developed during -forward rotation of the disc 40 than reverse rotation of the latter.
In accordance with the invention, it is seen, viewing Figure 2, that the caliper assembly 32 forms a single sliding connection with each pin 28 and 30 via the radially extending flanges 42 and 44 and the pins 28 and 30 are spaced from the caliper 32 on the axially outer side of the torque member 12. Consequently, the transverse width A, of the caliper 32 is substantially uniform from the radially extending flanges 42 and 44, but not inclusive thereof, to and including the radially inwardly extending leg 76. In other words, the caliper transverse width A is less than the transverse distance between the pins 28 and 30, provided the transverse width A is measured axially outside of the flanges 42 and 44.
In addition, the outer friction element 38 includes openings 83 and 85 for receiving the pins 28 and 30. These openings are provided in the radially outwardly extending ears 78 and 80 on the outer friction element, so that the concentricity between the openings 46, 48, and 83, 85, respectively, is maintained in the absence of openings being required in the caliper assembly leg 76. In contrast thereto, the prior art generally requires two sliding connections between the caliper and each pin so that two openings on the caliper assembly are required to be concentric for receiving the pin. As a result, the disc brake assembly of the present invention is believed to be easier to manufacture with respect to accomodating manufacturing tolerances, in comparison to the prior art pin slider disc brakes.
Furthermore, if the thermo-plastic sleeve isprovided, the resilient bushing cooperates with the thermo-plastic sleeve to form a sliding connection between the caliper and pin to accomodate axial movement of the caliper as the hydraulic actuator is operated to urge the pair of brake pads into frictional engagement with the rotor. Otherwise, the resilient bushing forms a single sliding connection with the pin 28. The disc brake 10 operates in a conventional manner to retard rotation of the rotor.
The foregoing description is directed to the left pin 28 and flange 42; however, the right pin 30 may carry a thermo-plastic sleeve which cooperates with a resilient bushing on the flange 44 in the same manner as the sleeve and bushing, 52 and 50, respectively.

Claims (11)

Claims
1. A disc brake assembly having a torque member which fixedly couples to vehicle frame, a caliper slidably disposed relative to the torque member and extending over a portion of the periphery of a disc, a pair of brake pads which are movable into engagement with the disc, and at least one pin cooperating with the torque member and the caliper to form a slidable connection therebetween, characterized in that said torque member includes a flange extending axially over the periphery of the disc, said flange including a bore for receiving the one pin.
2. A disc brake assembly according to Claim 1 characterized in that said flange bore is partially threaded to releasably engage a threaded portion of said one pin.
3. A disc brake assembly according to Claim 1, characterized in that the slidable connection formed by said one pin between the caliper and the torque member is defined by a thermo-plastic sleeve on said one pin and a resilient bushing on the caliper, said resilient bushing forming an opening to slidably receive said thermo-plastic sleeve.
4. A disc brake assembly according to Claim 1, characterized in that said one pin extends axially on both sides of the disc, said one pin slidably engaging the caliper on one side of the disc and slidably engaging one of the pair of brake pads on the other side of the disc, the caliper having a single slidable connection with the one pin.
5. A disc brake assembly according to Claim 4, characterized in that said one pin is spaced from the caliper on said other side of the disc.
6. A disc brake assembly according to Claim 4 characterized in that said one brake pad includes a radially outwardly extending ear for engaging the one pin.
7. A disc brake assembly according to Claim 6, characterized in that said one brake pad cooperates with the caliper assembly to transmit torque developed during braking to the caliper assembly so as to prevent the transfer of torque to said one pin.
8. A disc brake assembly according to Claim 4, characterized in that the caliper forms a substantially uniform transverse width on the other side of the torque member.
9. A disc brake assembly according to Claim 8 characterized in that a pair of pins releasably engage the torque member to define a transverse distance between the pair of pins and said caliper transverse width is less than said pair of pins transverse distance.
10. A disc brake assembly according to Claim 7, characterized in that said one pad includes at least one opening for movably receiving the one pin, a resilient member being disposed within the one brake pad opening to take up a spacing defined between the one pin and a wall of the one brake pad opening, said resilient member being deformable to permit movement between the one brake pad and the one pin while substantially preventing the transmission of torque developed by the one brake pad to the one pin.
11. A disc brake assembly substantially as described and as shown in the accompanying drawings.
GB7928060A 1978-08-28 1979-08-13 Disc brake assembly Expired GB2028940B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US93767978A 1978-08-28 1978-08-28

Publications (2)

Publication Number Publication Date
GB2028940A true GB2028940A (en) 1980-03-12
GB2028940B GB2028940B (en) 1982-10-13

Family

ID=25470250

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7928060A Expired GB2028940B (en) 1978-08-28 1979-08-13 Disc brake assembly

Country Status (9)

Country Link
JP (1) JPS5533995A (en)
AR (1) AR218157A1 (en)
AU (1) AU528405B2 (en)
BR (1) BR7905594A (en)
CA (1) CA1111356A (en)
DE (1) DE2934608A1 (en)
FR (1) FR2434962A1 (en)
GB (1) GB2028940B (en)
IT (1) IT1122787B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0018913A1 (en) * 1979-05-07 1980-11-12 Automobiles Citroen Disc brake
DE3526937A1 (en) * 1985-07-27 1987-02-05 Teves Gmbh Alfred Spot-type disc brake, in particular for motor vehicles
GB2188385A (en) * 1986-03-26 1987-09-30 Teves Gmbh Alfred Spot-type disc brake
US6340076B1 (en) * 1998-09-24 2002-01-22 Nissin Kogyo Co., Ltd. Vehicular disk brake

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA803140B (en) * 1979-06-16 1981-05-27 Lucas Industries Ltd Adjustable abutments in disc brakes
FR2503301B1 (en) * 1981-04-06 1986-03-07 Valeo CONTROL PIECE FOR BRAKE, AND BRAKE COMPRISING SUCH CONTROL PIECE, PARTICULARLY FOR MOTOR VEHICLE
JPS6336178Y2 (en) * 1981-05-20 1988-09-26
EP0085252B1 (en) * 1982-01-12 1986-04-16 Automotive Products Public Limited Company A disc brake and vehicle axle assembly and a disc brake caliper assembly
DE3509277A1 (en) * 1985-03-15 1986-09-25 Alfred Teves Gmbh, 6000 Frankfurt PARTIAL DISC BRAKE, IN PARTICULAR FOR MOTOR VEHICLES
DE9000489U1 (en) * 1990-01-18 1990-04-05 Jurid Werke Gmbh, 2056 Glinde Brake pad for disc brakes, especially for motor vehicles
JP4992768B2 (en) * 2008-03-10 2012-08-08 本田技研工業株式会社 Disc brake device
JP5791449B2 (en) * 2011-09-28 2015-10-07 曙ブレーキ工業株式会社 Disc brake device
EP2682632A3 (en) * 2011-09-28 2018-04-18 Akebono Brake Industry Co., Ltd. Disc brake apparatus

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2414174C2 (en) * 1974-03-23 1983-10-27 Alfred Teves Gmbh, 6000 Frankfurt Brake caliper guide for a partially lined disc brake

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0018913A1 (en) * 1979-05-07 1980-11-12 Automobiles Citroen Disc brake
DE3526937A1 (en) * 1985-07-27 1987-02-05 Teves Gmbh Alfred Spot-type disc brake, in particular for motor vehicles
GB2192678A (en) * 1985-07-27 1988-01-20 Teves Gmbh Alfred Spot-type disc brake
GB2192678B (en) * 1985-07-27 1989-08-16 Teves Gmbh Alfred Spot-type disk brake
GB2188385A (en) * 1986-03-26 1987-09-30 Teves Gmbh Alfred Spot-type disc brake
US4805745A (en) * 1986-03-26 1989-02-21 Alfred Teves Gmbh Spot-type disc brake with a radially acting spring
GB2188385B (en) * 1986-03-26 1990-10-10 Teves Gmbh Alfred Spot-type disc brake
US6340076B1 (en) * 1998-09-24 2002-01-22 Nissin Kogyo Co., Ltd. Vehicular disk brake

Also Published As

Publication number Publication date
FR2434962A1 (en) 1980-03-28
IT7925151A0 (en) 1979-08-17
IT1122787B (en) 1986-04-23
DE2934608A1 (en) 1980-03-20
CA1111356A (en) 1981-10-27
BR7905594A (en) 1980-05-20
GB2028940B (en) 1982-10-13
AR218157A1 (en) 1980-05-15
AU5002779A (en) 1980-03-06
JPS5533995A (en) 1980-03-10
AU528405B2 (en) 1983-04-28

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19930813