GB1585806A - Disc brake - Google Patents

Disc brake Download PDF

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Publication number
GB1585806A
GB1585806A GB3190677A GB3190677A GB1585806A GB 1585806 A GB1585806 A GB 1585806A GB 3190677 A GB3190677 A GB 3190677A GB 3190677 A GB3190677 A GB 3190677A GB 1585806 A GB1585806 A GB 1585806A
Authority
GB
United Kingdom
Prior art keywords
pad
pins
friction pad
portions
friction
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
Application number
GB3190677A
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.)
Tokico Ltd
Original Assignee
Tokico Ltd
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 Tokico Ltd filed Critical Tokico Ltd
Publication of GB1585806A publication Critical patent/GB1585806A/en
Expired legal-status Critical Current

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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
    • F16D55/228—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 separate actuating member for each side
    • 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
    • F16D65/0976—Springs made from wire acting on one pad only

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

Description

(54) IMPROVEMENTS RELATING TO A DISC BRAKE (71) We, TOKICO LTD ., a Japanese body corporate, of 6-3, Fujimi l-chome, Kawasaki-ku, Kawasaki-shi, Kanagawa-ken, Japan, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement: The present invention relates to disc brakes.
One type of conventional disk brake has two parallel pins mounted on a caliper and a friction pad slidably supported on the pins.
To prevent vibrations of the friction pad relative to the pins, a pad spring is mounted on the friction pad and engages with the pins. The opposite end portions of the spring are hooked around the lower side of the pins and, a generally U-shaped retaining portion formed in the central portion of the spring straddles on the upper end of the central portion of the friction pad whereby the friction pad is biassed against the pins. The end portions of the pad spring are bent upward, but usually, these portions do not project from the edge of the friction pad so as to prevent interference with other parts of the vehicle and to prevent incidental disengagement with the pins. When the pad spring is installed in a disc brake, one of the end portions of the pad spring is firstly pressed downward so as to clear a hole formed in the friction pad, and thereafter, a pin is inserted through the hole. However, the pressing down operation is difficult since available space between the friction pad and brake structure is narrow, and such operation is necessarily performed along a surface of the friction pad.
Further, in a disc brake of the type having a torque receiving member on the right and left sides of the friction pad, the available space will be restricted further, so that assembling of the pad spring is very difficult.
An aim of the present invention is to provide a disc brake eliminating aforementioned shortcomings.
According to the present invention there is provided a disc brake comprising two parallel pins mounted on a caliper, a friction pad supported slidably on the pins which pass through the friction pad, and a pad spring the central portion thereof being formed to straddle on the upper edge of a backing plate of the friction pad and two arm portions thereof being retained on the lower side of the pins respectively, the end portion of at least one arm portion of the pad spring being bent into the upward direction and being further bent in the horizontal direction at or above the level of the upper edge of the friction pad to provide a generally horizontally extending distal portion which is depressed during mounting or dismounting of the spring on the pad.
The present invention will now be further described, by way of example, with reference to the accompanying drawings, in which: Fig. 1 is a partially cross-sectional, schematic front view of a disc brake having a conventional pad spring; Fig. 2 is a cross-sectional view taken along line II-II in Fig. 1; Fig. 3 is a plan view of one embodiment of a disc brake according to the present invention Fig. 4 is a cross-sectional view taken along line IV-IV in Fig. 3; Fig. 5 is a perspective view of a pad spring according to the present invention; and Fig. 6 is a cross-sectional view taken along line VI-VI in Fig. 4.
One type of conventional disc brake comprises, as shown in Figures 1 and 2, two parallel pins 1, 2 mounted on a caliper (not shown) and a friction pad 3 supported on the pins slidably. For preventing vibrations of the friction pad 3 relative to the pins 1 and 2, a pad spring 4 is mounted on the friction pad 3 and engages with the pins 1 and 2.
As shown in Figure 1, the opposite end portions 4a and 4b of the spring 4 are hooked around the lower side of the pins 1 and 2 respectively and, a generally U-shaped retaining portion 4c formed in the central portion of the spring 4 straddles on the upper end of the central portion of the friction pad 3, whereby the friction pad 3 is biassed in the downward direction in Figure 1 relative to the pins 1 and 2. The end portions 4a and 4b of the pad spring 4 are bent upward as shown in Figure 1, but usually, these portions do not project beyond the edge of the friction pad 3 so as to prevent interference with parts B of the vehicle side and to prevent incidental disengagement with the pins 1 or 2. When the pad spring 4 is assembled to the pins 1 and 2 and the friction pad 3, the end portion 4a or 4b of the pad spring 4 is firstly pressed downward in the drawing so as to clear a hole 5 formed in the friction pad 3, and thereafter, the pin 1 or 2 is inserted through the hole 5. However, the pressing down operation is difficult since the available space between the friction pad and brake structure is narrow, and such an operation has to be performed along a surface of the friction pad.
In Figs. 3 and 4, a disc brake according to the present invention is illustrated. The brake has a caliper 6 having an opening 7 in the upper central portion thereof. Pins 8 and 9 extend across the opening 7 and are parallel to the axis of a brake disc (not shown) which is rotatable integrally with a road wheel. The pins 8 and 9 pass through holes 12, 12 formed in friction pads 10, 10 and, thereby slidably support the friction pads. The friction pads 10, 10 comprise friction material 13, 13 secured to opposing surfaces of backing plates 11, 11. The brake disc aforementioned is arranged between the friction pads 10, 10. Pistons 14 and 15 are fitted respectively in bores 6a and 6b formed opposingly in the caliper 6 to press the friction pads 10, 10 onto the brake disc.
Hydraulic oil is introduced into the bores 6g and 6b to operate the pistons 14 and 15.
A caliper cover 16 covers the opening 7 to prevent ingress of dust or water.
Pad springs 17, 17 according to the present invention, are provided to act between the pins 8, 9 and friction pads 10, 10. As shown clearly in Figures 4, 5 and 6, a generally U-shaped retaining portion 1 7c formed at the central portion of the pad spring 17 straddles on the upper central portion of backing plate 11 of the friction pad 10, and two leg portions 17a, 17b extending from the retaining portion 17c, engage respectively with the lower side of the pins 8 and 9 and, thereafter, are bent upward to form arm portions 18 and 19. The distal end portions of the arm portions 18 and 19 are bent inwardly toward one another to form pressing portions 20 and 21. The pressing portions 20 and 21 project from the upper edge of the backing plate 11 of friction pad 10 by a small amount when the pad spring 17 is in the assembled condition as shown in Figures 4 and 6.
In the illustrated embodiment, the pressing portions 20, 21 extend generally parallel to the backing plate 11 of the friction pad 10, but alternatively the pressing portions 20, 21 may be bent from the upwardly extending arm portions 18, 19 so as to extend generally parallel to the pin 8 or 9. Further, the end portions 18, 20; 19, 21 of the leg portions 17a, 17b may be formed to have semi-circular configurations or the like, with the distal end portions thereof projecting upwardly of the upper edge of the backing plate 11 of the friction pad.
In mounting the pad spring 17 onto the friction pad 10 and the pins 8 and 9, the retaining portion 17c is engaged on the upper edge of the backing plate 11 firstly, then, the pressing portions 20, 21 are pressed downward so as to displace the leg portions 17a, 17b downward to clear the pin receiving holes 12, 12, and the pins 8, 9 are inserted through the holes 12, 12. Alternatively, one of the leg portions 17a or 17b may firstly be hooked around one of the pins 8 or 9 being located in its position and, thereafter, by applying pressing force on the other of the leg portions 17b or l7a at the pressing portion 21 or 20, the other pin 9 or 8 may be mounted in its position.
The pad spring according to the present invention having the aforesaid construction, may advantageously be utilized in any type of disc brake provided that a friction pad is supported by two parallel pins, e.g. a floating caliper type disc brake in which two opposing pistons are disposed on one side of a brake disc and a caliper is floatingly supported on a stationary member.
In the illustrated embodiment, the pressing portions 20, 21 project upwardly beyond the upper edge of the backing plate 11.
However, alternatively the pressing portions may be formed to align generally with the upper edge of the friction pad 10.
It will be appreciated that by providing pressing portions on the upwardly projecting distal end portions of a wire or rod shaped pad spring it is possible to obtain pressing force receiving area much larger than that of conventional pad spring. Thus an assembling or disassembling operation is very easy. Further, the pressing portions are disposed on or above the level of the upper edge of the friction pad, thus, the pad spring can easily be pressed downward.
WHAT WE CLAIM IS: 1. A disc brake comprising two parallel pins mounted on a caliper, a friction pad supported slidably on the pins which pass through the friction pad, and a pad spring the central portion thereof being formed to straddle on the upper edge of a backing plate of the friction pad and two arm por
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (3)

**WARNING** start of CLMS field may overlap end of DESC **. friction pad 3, whereby the friction pad 3 is biassed in the downward direction in Figure 1 relative to the pins 1 and 2. The end portions 4a and 4b of the pad spring 4 are bent upward as shown in Figure 1, but usually, these portions do not project beyond the edge of the friction pad 3 so as to prevent interference with parts B of the vehicle side and to prevent incidental disengagement with the pins 1 or 2. When the pad spring 4 is assembled to the pins 1 and 2 and the friction pad 3, the end portion 4a or 4b of the pad spring 4 is firstly pressed downward in the drawing so as to clear a hole 5 formed in the friction pad 3, and thereafter, the pin 1 or 2 is inserted through the hole 5. However, the pressing down operation is difficult since the available space between the friction pad and brake structure is narrow, and such an operation has to be performed along a surface of the friction pad. In Figs. 3 and 4, a disc brake according to the present invention is illustrated. The brake has a caliper 6 having an opening 7 in the upper central portion thereof. Pins 8 and 9 extend across the opening 7 and are parallel to the axis of a brake disc (not shown) which is rotatable integrally with a road wheel. The pins 8 and 9 pass through holes 12, 12 formed in friction pads 10, 10 and, thereby slidably support the friction pads. The friction pads 10, 10 comprise friction material 13, 13 secured to opposing surfaces of backing plates 11, 11. The brake disc aforementioned is arranged between the friction pads 10, 10. Pistons 14 and 15 are fitted respectively in bores 6a and 6b formed opposingly in the caliper 6 to press the friction pads 10, 10 onto the brake disc. Hydraulic oil is introduced into the bores 6g and 6b to operate the pistons 14 and 15. A caliper cover 16 covers the opening 7 to prevent ingress of dust or water. Pad springs 17, 17 according to the present invention, are provided to act between the pins 8, 9 and friction pads 10, 10. As shown clearly in Figures 4, 5 and 6, a generally U-shaped retaining portion 1 7c formed at the central portion of the pad spring 17 straddles on the upper central portion of backing plate 11 of the friction pad 10, and two leg portions 17a, 17b extending from the retaining portion 17c, engage respectively with the lower side of the pins 8 and 9 and, thereafter, are bent upward to form arm portions 18 and 19. The distal end portions of the arm portions 18 and 19 are bent inwardly toward one another to form pressing portions 20 and 21. The pressing portions 20 and 21 project from the upper edge of the backing plate 11 of friction pad 10 by a small amount when the pad spring 17 is in the assembled condition as shown in Figures 4 and 6. In the illustrated embodiment, the pressing portions 20, 21 extend generally parallel to the backing plate 11 of the friction pad 10, but alternatively the pressing portions 20, 21 may be bent from the upwardly extending arm portions 18, 19 so as to extend generally parallel to the pin 8 or 9. Further, the end portions 18, 20; 19, 21 of the leg portions 17a, 17b may be formed to have semi-circular configurations or the like, with the distal end portions thereof projecting upwardly of the upper edge of the backing plate 11 of the friction pad. In mounting the pad spring 17 onto the friction pad 10 and the pins 8 and 9, the retaining portion 17c is engaged on the upper edge of the backing plate 11 firstly, then, the pressing portions 20, 21 are pressed downward so as to displace the leg portions 17a, 17b downward to clear the pin receiving holes 12, 12, and the pins 8, 9 are inserted through the holes 12, 12. Alternatively, one of the leg portions 17a or 17b may firstly be hooked around one of the pins 8 or 9 being located in its position and, thereafter, by applying pressing force on the other of the leg portions 17b or l7a at the pressing portion 21 or 20, the other pin 9 or 8 may be mounted in its position. The pad spring according to the present invention having the aforesaid construction, may advantageously be utilized in any type of disc brake provided that a friction pad is supported by two parallel pins, e.g. a floating caliper type disc brake in which two opposing pistons are disposed on one side of a brake disc and a caliper is floatingly supported on a stationary member. In the illustrated embodiment, the pressing portions 20, 21 project upwardly beyond the upper edge of the backing plate 11. However, alternatively the pressing portions may be formed to align generally with the upper edge of the friction pad 10. It will be appreciated that by providing pressing portions on the upwardly projecting distal end portions of a wire or rod shaped pad spring it is possible to obtain pressing force receiving area much larger than that of conventional pad spring. Thus an assembling or disassembling operation is very easy. Further, the pressing portions are disposed on or above the level of the upper edge of the friction pad, thus, the pad spring can easily be pressed downward. WHAT WE CLAIM IS:
1. A disc brake comprising two parallel pins mounted on a caliper, a friction pad supported slidably on the pins which pass through the friction pad, and a pad spring the central portion thereof being formed to straddle on the upper edge of a backing plate of the friction pad and two arm por
tions thereof being retained on the lower side of the pins respectively, the end portion of at least one arm portion of the pad spring being bent into the upward direction and being further bent in the horizontal direction at or above the level of the upper edge of the friction pad to provide a generally horizontally extending distal portion which is depressed during mounting or dismounting of the spring on the pad.
2. A disc brake as claimed in claim 1 in which the central portion of the pad spring is formed to have a generally Ushaped configuration so as to straddle on the upper edge of the backing plate of the friction pad.
3. A disc brake constructed and arranged substantially as hereinbefore described with reference to and as illustrated in Figs. 3 to 6 of the accompanying drawings.
GB3190677A 1976-07-30 1977-07-29 Disc brake Expired GB1585806A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1976102747U JPS585142Y2 (en) 1976-07-30 1976-07-30 disc brake

Publications (1)

Publication Number Publication Date
GB1585806A true GB1585806A (en) 1981-03-11

Family

ID=14335807

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3190677A Expired GB1585806A (en) 1976-07-30 1977-07-29 Disc brake

Country Status (3)

Country Link
JP (1) JPS585142Y2 (en)
BR (1) BR7705020A (en)
GB (1) GB1585806A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2137293A (en) * 1980-12-01 1984-10-03 Rockwell International Corp Anti-rattle spring clip for disc brakes
EP0153280A2 (en) * 1984-01-19 1985-08-28 METAL-FREN SOCIETA' ITALIANA LAVORAZIONE MATERIALE D'ATTRITO di Ing. Bruno e Antonio DONETTI S.n.c. Friction pad assembly for use in a disc brake for vehicles

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5725286B2 (en) * 2011-02-18 2015-05-27 曙ブレーキ工業株式会社 Pad clip assembly structure

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4733386U (en) * 1971-05-01 1972-12-14

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2137293A (en) * 1980-12-01 1984-10-03 Rockwell International Corp Anti-rattle spring clip for disc brakes
EP0153280A2 (en) * 1984-01-19 1985-08-28 METAL-FREN SOCIETA' ITALIANA LAVORAZIONE MATERIALE D'ATTRITO di Ing. Bruno e Antonio DONETTI S.n.c. Friction pad assembly for use in a disc brake for vehicles
EP0153280A3 (en) * 1984-01-19 1986-01-15 Metal-Fren Societa' Italiana Lavorazione Materiale D'attrito Di Ing. Bruno E Antonio Donetti S.N.C. Friction pad assembly for use in a disc brake for vehicles

Also Published As

Publication number Publication date
JPS5319687U (en) 1978-02-20
BR7705020A (en) 1978-05-02
JPS585142Y2 (en) 1983-01-28

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CSNS Application of which complete specification have been accepted and published, but patent is not sealed