GB1563818A - Disc brakes - Google Patents
Disc brakes Download PDFInfo
- Publication number
- GB1563818A GB1563818A GB1445379A GB1445379A GB1563818A GB 1563818 A GB1563818 A GB 1563818A GB 1445379 A GB1445379 A GB 1445379A GB 1445379 A GB1445379 A GB 1445379A GB 1563818 A GB1563818 A GB 1563818A
- Authority
- GB
- United Kingdom
- Prior art keywords
- disc
- support member
- arms
- caliper
- friction pad
- 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
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
- F16D55/22655—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
- 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
- F16D2055/0016—Brake calipers
- F16D2055/002—Brake calipers assembled from a plurality of parts
-
- 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)
Description
PATENT SPECIFICATION
( 21) Application No 14453179 ( 22 ( 62) Divided out of No 1 563 817 ( 31) Convention Application No.
50/098823 ( 11) 2) Filed 13 Aug 1976 ( 32) Filed 14 Aug 1975 in ( 33) Japan (JP) ( 44) Complete Specification published 2 April 1980 ( 51) INT CL U F 16 D 55/224 ( 52) Index at acceptance F 2 E 2 NID 16 EI ( 54) IMPROVEMENTS IN AND RELATING TO DISC BRAKES ( 71) We, TO Kico LTD, a Japanese body corporate, of 6-3, Fujimi 1-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:
This invention relates to disc brakes and in particular to disc brakes of the floating caliper type.
A typical known floating type disc brake comprises a rotary disc, a support member adapted to be secured to a stationary part of a vehicle and including a pair of arms which are spaced apart in the circumferential direction of the disc, a caliper member slidably supported in relation to the support member by means of two parallel pins whose axes are parallel to the rotary axis of the disc and which are carried by the caliper member and are slidably received in guide bores formed in the two arms of the support member, respectively, a first friction pad assembly disposed on one side of the disc and carried by the support member whereby, upon braking, the braking force on the first friction pad assembly is transmitted directly to one of said support member arms, and a second friction pad assembly disposed on the other side of the disc and supported by the caliper member In the known brakes, the arrangement is usual such that, upon braking, the braking force on the second friction pad assembly is transmitted substantially evenly to both support member arms via the caliper member and said pins Thus a substantial portion of the brake force is transmitted, by said one of the support member arms, the result of which is that at least the portion of the support member defining said one arm has to be made relatively massive so that the support member is correspondingly heavy.
It is an objective of the present invention to enable the braking force to be more evenly distributed between the arms of the support member and hence enable the support member to be less massive and so be 50 correspondingly lighter.
In accordance with the present invention a floating caliper-type disc brake comprises a rotary disc, a support member adapted to be secured to a stationary part of a 55 vehicle and including a pair of arms which are spaced apart in the circumferential direction of the disc, a caliper member slidably supported in relation to the support member by means of two pins whose 60 axes are parallel to the rotary axis of the disc and which are carried by the caliper member and are slidably received in guide bores formed in the two arms of the support member, respectively, a first friction 65 pad assembly disposed on one side of the disc and carried by the support member whereby, upon braking, the braking force on the first friction pad assembly is transmitted directly to one of said support mem 70 ber arms, and a second friction pad assembly disposed on the other side of the disc and supported by the caliper member, the pins being slidably received with clearance in said guide bores but being engage 75 able directly with the respective bores, and the clearance between the pin and the associated guide bore in said one of the support member arms being greater than the clearance between the pin and the associated 80 guide bore in the other of said support member arms whereby, upon braking, the braking force on the second friction pad assembly is transmitted to said other of said support member arms via the caliper mem 85 ber and the corresponding one of said pins only.
The invention is described further hereinafter, by way of example, with reference to the accompanying drawings, in which: 90 00 Xn 1 563 818 1 563 818 Fig 1 is a top plan view of one preferred embodiment of a floating caliper-type disc brake constructed in accordance with the present invention showing a portion of the brake in section: and Fig 2 is a side elevation in partial section taken substantially along the line IVl V of Fig 1.
The drawings show an example of a floating caliper-type disc brake in accordance with the invention of a type which can be employed advantageously on a twowheeled vehicle.
The basic operational principle of the present disc brake is substantially the same as that of prior art disc brakes Thus, when the driver applies the brake, a metered amount of oil under pressure is supplied from a suitable oil supply source (not shown) through an oil inlet hole 102 formed in the upper portion of a housing or caliper member 100 into a cylinder 103 defined in the housing 100 The incoming oil pressure moves a piston 104 slidably received in the cylinder 103 in the direction of arrow 105 toward a rotary disc (not shown) to generate a reaction force The reaction force thus generated bodily moves the housing 100 in a direction opposite to the direction of arrow 105 relative to a substantially Y-shaped vertically extending support 107 which is fixedly secured to front forks of a vehicle body, shown by phantom lines in Fig 2, at mounting holes 106 in a conventional manner The Yshaped support 107 has left and right-hand arms 121, 122 spaced apart in the circumferential direction of the disc and each having a thickened or horizontally and axially extending portion 108 provided with a guide bore in the form of an axial through-hole 109 at its upper end Slide pins 112 in the form Of bolts have their intermediate shank portions slidably received in the through holes 109 in the thickened portions 108 on the arms 121, 122 of the support 107 and are snugly fitted at their opposite ends in aligned holes 110, 111 of the housing 100 whereby the housingc 100 can bodily and slidably move relative to the support 107 The pins 112 have their axes parallel to the rotary axis of the disc In this way, one surface of the disc is engaged by the friction pad or pad assembly 113 which is directly operated by the piston 104 and the other surface is engaged by the second friction pad or pad assembly 114 The friction pad 113 is suspended on spaced apart, parallel pins 117 which are supported at their opposite ends in upper ribs 115, 116 on the housing The friction pad 114 is held in position on the housing 100 by suitable means and is suspended on the slide pins 117 in the same manner as the friction pad 113.
The friction pad 113 is slidably received between the arms 121, 122 on the support 107 and when the piston 104 is moved in the direction of arrow 105, the pad 113 is slidably guided between the support arms 70 in the arrow direction and is applied against the disc.
As shown in Fig 2 the pins 112 are slidably received with clearance in the corresponding bores 109 but are engageable 75 directly with said bores The through-hole 109 in the left-hand arm of the support 107 snugly receives the associated pin 112 but the through-hole 109 in the right-hand arm 122 of the support 107 loosely receives the 80 associated slide pin 112 with a clearance 125.
Thus, if the brake is applied when the disc 123 is rotating in the direction of arrow 123 as viewed in Fig 2, the braking force 85 from the friction pad 113 acts in such a manner that the friction pad and more paricularly, the backing plate associated with that friction pad, moves in the direction of arrow 124 until the right-hand side 90 edge of the backing plate abuts against the left-hand side face of the right-hand arm 122 of the support 107 The braking force transmitted to the arm 122 in this way is directly applied through the support 107 to 95 the vehicle (not shown) On the other hand, the braking force from the friction pad 114, adapted to move together with the housing 100 and to be applied against the surface of the disc opposite to the disc 100 surface against which the friction pad 113 acts, is directed in the direction of arrow 124 However, since the friction pad 114 moves with the housing 100, the braking force of the pad in the arrow direction has 105 the result of moving the housing 100 in the arrow direction 124 Since the housing 100 has the slide pins 112 secured thereto, the braking force of the friction pad 114 is converted into a force which urges the pins 110 112 towards the right as viewed in Figs 1 and 2 When the relationship between the pins 112 and support 107 or the holes 109 in the arms 121, 122 of the support 107 is considered, although the left-hand hole 109 115 snugly receives the associated pin 112, the right-hand hole 109 loosely receives the associated pin 112 with the clearance 125.
Thus, the force urging the pins 112 rightwards is transmitted to the support 107 120 only through the left-hand pin 112 and arm 121.
That is, one half of the whole braking force is separately applied to each of the arms 121, 122 of the support 107, In the 125 prior art disc brakes in which the holes in the left-hand and right-hand arms of the support both snugly receive the slide pins, when the disc is rotating in the arrow direction 123, for example, the braking force lO'0 I 1 3 1 563 818 3.
from the friction pad 113 adjacent the piston 104 is, of course, applied to the right-hand arm 122 and the braking force from the other friction pad 114 is substantially equally distributed to the arms 121.
122 Therefore, about 75 % of the whole braking force is applied to the right-hand arm 122 whereas the remaining 25 % of the braking force is applied to the left-hand arm 121 This necessitates increasing the thickness of the right-hand support arm or providing this arm with a reinforcing rib.
The illustrated embodiment will now be described further in more detail Assuming that the braking force from one friction pad is designed as F, the distance between the axes of the slide pins 112 is designed as A and the distance between the slide pin and operation point in the arrow direction is designed as h, then it can be considered that an upward moment having the magnitude F will act on the other friction pad.
X Generally, in this type of disc brake, < 1 and the force to be applied to the right-hand arm 122 is reduced Furthermore, this force F.h tends to rotate the right-hand arm 122 in the counter-clockwise direction and offsets a portion of the braking force of the friction pad 113 or the force tending to rotate the arm 122 in the clockwise direction which is directly applied to the righthand arm 122, resolting in ssbstantial reduction of the force applied to the righthand arm 122, resulting in substantial rethe right-hand arm 122 as required in the conventional disc brakes becomcs unnecessary.
In this embodiment, since the pads 113, 114 are merely suspended on the pins 117 adjacent the opposite surfaces of the disc within the opening 118 formed in the uppei portion of the housing 100 when the pin.
117 are removed the friction pads 113, 114 can be easily taken out of the opening 118 for replacement.
Reference is hereby directed to our copending Application No 33742/76 (Serial no 1563817) which describes and claims a floating caliper-type disc brake comprising a rotary disc, a support member adapted to be secured to a stationary part of a vehicle and including a pair of arms which are spaced apart in the circumferential direction of the disc, a caliper member slidably supported in relation to the support member by means of two pins whose axes are parallel to the rotary axis of the disc and which are carried by the caliper member and are slidably received in guide bores formed in the two arms of the support 60 member, respectively, a first friction pad assembly disposed on one side of the disc and carried by the support member whereby, upon braking, the braking force on the first friction pad assembly is transmitted 65 directly to one of said support member arms, and a second friction pad assembly disposed on the other side of the disc and supported by the caliper member, the spacing between the axes of said pins being less 70 than the spacing between the axes of said guide bores and said pins being of smaller diameter than said guide bores respectively such that, upon braking, the braking force on the second friction pad assembly is 75 transmitted to the other of said support member arms via the caliper member and the corresponding one of said pins only.
Claims (3)
1 A floating caliper-type disc brake 80 comprising a rotary disc, a support member adapted to be secured to a stationary part of a vehicle and including a pair of arms which are spaced apart in the circumferential direction of the disc, a caliper 85 member slidably supported in relation to the support member by means of two pins whose axes are parallel to the rotary axis of the disc and which are carried by the caliper member and are slidably received 90 in guide bores formed in the two arms of the support member, respectively, a first friction pad assembly disposed on one side of the disc and carried by the support member whereby, upon braking, the brak 95 ing force on the first friction pad assembly is transmitted directly to one of said support member arms, and a second friction pad assembly disposed on the other side of the disc and supported by the caliper mem 100 ber, the pins being slidably received with clearance in said guide bores but being engageable directly with the respective bores, and the clearance between the pin and the associated guide bore in said one 105 of the support member arms being greater than the clearance between the pin and the associated guide bore in the other of said support member arms whereby, upon braking, the braking force on the second 11 o friction pad assembly is transmitted to said other of said support member arms via the caliper member and the corresponding one of said pins only.
2 A disc brake as claimed in claim I in 115 which the pins are in the form of bolts whose two ends are rigidly secured to the caliper member and whose intermediate 1 563 818 1 563 818 shank portions are slidably received in said guide bores.
3 A disc brake substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
W P THOMPSON & CO, Coopers Building, Church Street, Liverpool LI 1 3 AB.
Chartered Patent Agents.
Printed for Her Majesty's Stationery Office by The Tweeddale Press Ltd Berwick-upon-Tweed, 1980.
Published at the Patent Office 25 Southampton Buildings, London, WC 2 A l AY, from which copies may be obtained.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP50098823A JPS5222660A (en) | 1975-08-14 | 1975-08-14 | Disc brake |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1563818A true GB1563818A (en) | 1980-04-02 |
Family
ID=14230010
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1445379A Expired GB1563818A (en) | 1975-08-14 | 1976-08-13 | Disc brakes |
| GB3374276A Expired GB1563817A (en) | 1975-08-14 | 1976-08-13 | Disc brakes |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3374276A Expired GB1563817A (en) | 1975-08-14 | 1976-08-13 | Disc brakes |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPS5222660A (en) |
| GB (2) | GB1563818A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2311107A (en) * | 1996-03-15 | 1997-09-17 | Akebono Brake Ind | Disc brake |
| DE10242102A1 (en) * | 2002-09-11 | 2004-03-25 | Continental Teves Ag & Co. Ohg | Method for fitting guide shafts to disc brake housing has one end of each shaft threaded with the same diameter as the remainder of the shaft and with a profiled end to secure into a shaped threaded hole in the brake housing |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2541743B1 (en) * | 1983-02-25 | 1987-09-18 | Dba | SLIDING CALIPER DISC BRAKE |
-
1975
- 1975-08-14 JP JP50098823A patent/JPS5222660A/en active Pending
-
1976
- 1976-08-13 GB GB1445379A patent/GB1563818A/en not_active Expired
- 1976-08-13 GB GB3374276A patent/GB1563817A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2311107A (en) * | 1996-03-15 | 1997-09-17 | Akebono Brake Ind | Disc brake |
| GB2311107B (en) * | 1996-03-15 | 1998-10-21 | Akebono Brake Ind | Disc brake |
| US5931267A (en) * | 1996-03-15 | 1999-08-03 | Akebono Brake Industry Co., Ltd. | Disc brake |
| AU710574B2 (en) * | 1996-03-15 | 1999-09-23 | Akebono Brake Industry Co., Ltd. | Disc brake |
| DE10242102A1 (en) * | 2002-09-11 | 2004-03-25 | Continental Teves Ag & Co. Ohg | Method for fitting guide shafts to disc brake housing has one end of each shaft threaded with the same diameter as the remainder of the shaft and with a profiled end to secure into a shaped threaded hole in the brake housing |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5222660A (en) | 1977-02-21 |
| GB1563817A (en) | 1980-04-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |