GB2125125A - Brake shoe liner for drum brakes - Google Patents
Brake shoe liner for drum brakes Download PDFInfo
- Publication number
- GB2125125A GB2125125A GB08316380A GB8316380A GB2125125A GB 2125125 A GB2125125 A GB 2125125A GB 08316380 A GB08316380 A GB 08316380A GB 8316380 A GB8316380 A GB 8316380A GB 2125125 A GB2125125 A GB 2125125A
- Authority
- GB
- United Kingdom
- Prior art keywords
- liner
- brake shoe
- drum
- strip
- grooves
- 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.)
- Withdrawn
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
- F16D65/00—Parts or details
- F16D65/02—Braking members; Mounting thereof
- F16D65/04—Bands, shoes or pads; Pivots or supporting members therefor
- F16D65/08—Bands, shoes or pads; Pivots or supporting members therefor for internally-engaging brakes
-
- 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
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
-
- 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
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D2069/004—Profiled friction surfaces, e.g. grooves, dimples
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
A brake shoe liner (1) for drum brakes comprises a rectangular strip of friction material the major face (2) of which, opposite that intended to be fixed, in use, to a brake shoe, has a plurality of parallel grooves (3) inclined to the longitudinal sides of the strip. The brake shoe liner makes it possible to avoid the formation of a continuous film of water between the brake shoe liner and the drum and the consequent impairment of the braking effect when braking in wet conditions. Preferably, grooves (3) are inclined at angle of 45 DEG to the longitudinal sides and their depth is about one half the thickness of the liner. <IMAGE>
Description
SPECIFICATION
Drum brake shoe liners
The present invention relates to brake shoe liners for drum brakes.
A known type of brake shoe liner consists of a rectangular strip of friction material which is fitted to the curved surface of a brake shoe. The liner conventionally has two smooth major faces one of which is intended to be fixed by adhesive or riveting to the shoe, whilst the opposite face acts on the inner surface of a brake drum during braking.
A serious drawback of conventional brake shoe liners is their impaired performance when wet. In wet conditions it is in fact possible for a continuous film of water to form on the braking surface of the liner, reducing the friction, upon braking, between the shoe and the drum, and reducing the braking effect.
The object of the present invention is to provide a brake shoe liner which on the one hand avoids the formation of a continuous film of water between the liner and the drum under wet conditions and as a result does not exhibit any marked reduction of braking performance when wet, without on the other hand entailing substantial additional manufacturing costs compared to those of conventional brake shoe liners.
The present invention accordingly provides a brake shoe liner for drum brakes comprising an elongate strip of friction material, in which the major face of the strip opposite that intended to be fixed, in use, to a brake shoe is provided with a plurality of parallel grooves inclined to the longitudinal sides of the strip.
In use, the grooves in the outer face of the liner create a system of channels which, in the event of operation in wet conditions, allow the discharge of the water which would otherwise tend to form a continuous film between the liner and the drum.
The accompanying drawings illustrate, by way of example, a liner according to the invention, shown in perspective.
The reference numeral 1 indicates a liner of friction material for drum brakes, in the form of an elongate, in this case, rectangular strip having a thickness typically of from three to six millimetres.
The liner has a smooth inner major face intended to be fixed by adhesive or by riveting to a curved brake shoe of a drum brake and an outer major face 2 intended to come into frictional contact with the internal surface of a brake drum during braking. The face 2 has a plurality of parallel grooves 3 of rectangular cross section, inclined to the longitudinal sides of the liner 1.
Preferably, the grooves 3 are inclined at an angle of 450 to the longitudinal sides of the major faces of the liner 1. The depth of the grooves 3 is equal to about one half of the thickness of the liner.
The cross-sectional profile of the grooves 3 could be different from the rectangular profile illustrated by way of example.
1. A brake shoe liner for drum brakes comprising an elongate strip of friction material, in which the major face of the strip opposite that intended to be fixed, in use, to a brake shoe is provided with a plurality of parallel grooves inclined to the longitudinal sides of the strip.
2. A brake shoe liner according to Claim 1, in which the said grooves are inclined at an angle of substantially 450 to the said longitudinal sides of the strip.
3. A brake shoe liner according to Claim 1 or
Claim 2, in which the depth of the said grooves is equal to about one half of the thickness of the liner.
4. A brake shoe liner substantially as herein described with reference to and as shown in the accompany drawing.
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (4)
1. A brake shoe liner for drum brakes comprising an elongate strip of friction material, in which the major face of the strip opposite that intended to be fixed, in use, to a brake shoe is provided with a plurality of parallel grooves inclined to the longitudinal sides of the strip.
2. A brake shoe liner according to Claim 1, in which the said grooves are inclined at an angle of substantially 450 to the said longitudinal sides of the strip.
3. A brake shoe liner according to Claim 1 or
Claim 2, in which the depth of the said grooves is equal to about one half of the thickness of the liner.
4. A brake shoe liner substantially as herein described with reference to and as shown in the accompany drawing.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT5359982U IT8253599V0 (en) | 1982-08-02 | 1982-08-02 | GASKETS FOR DRUM BRAKE SHOES |
Publications (2)
Publication Number | Publication Date |
---|---|
GB8316380D0 GB8316380D0 (en) | 1983-07-20 |
GB2125125A true GB2125125A (en) | 1984-02-29 |
Family
ID=11283978
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB08316380A Withdrawn GB2125125A (en) | 1982-08-02 | 1983-06-16 | Brake shoe liner for drum brakes |
Country Status (4)
Country | Link |
---|---|
DE (1) | DE8316745U1 (en) |
FR (1) | FR2531168A3 (en) |
GB (1) | GB2125125A (en) |
IT (1) | IT8253599V0 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2576074A1 (en) * | 1985-01-11 | 1986-07-18 | Ferodo Ltd | IMPROVEMENTS TO THE CLUTCH TRIM |
US5238091A (en) * | 1990-09-29 | 1993-08-24 | Aisin Kako Kabushiki Kaisha | Brake band for automatic transmission |
WO1998050710A1 (en) * | 1997-05-05 | 1998-11-12 | Heru Prasanta Wijaya | Grooved brake shoe |
DE19751914A1 (en) * | 1997-11-22 | 1999-05-27 | Itt Mfg Enterprises Inc | Brake shoe for friction brake, with friction lining on support |
US6035991A (en) * | 1996-12-11 | 2000-03-14 | Advanced Friction Materials, Inc. | Blocked slot clutch plate lining |
US20160108982A1 (en) * | 2013-05-15 | 2016-04-21 | Otsuka Chemical Co., Ltd. | Friction material and friction material for use in drum brake |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19614268C1 (en) * | 1996-04-11 | 1997-08-14 | Ferodo Beral Gmbh | Friction lining with defined friction coefficient |
DE102011106009A1 (en) * | 2011-06-30 | 2013-01-03 | Borgwarner Inc. | A method for producing a recess pattern in the friction surface of a friction member and friction member for a frictionally-operating device having such a recess pattern |
CN107725643A (en) * | 2017-11-29 | 2018-02-23 | 兴化市通舟船舶设备有限公司 | A kind of high intensity winch brake band |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB477703A (en) * | 1936-07-27 | 1938-01-05 | Fibrax Ltd | Brake blocks, particularly for use on cycle brakes |
GB488382A (en) * | 1936-02-11 | 1938-07-06 | Pietro Smalzi | Improvements in brake blocks or linings with a view to increasing their adherence |
GB772989A (en) * | 1954-09-15 | 1957-04-17 | Westinghouse Air Brake Co | Improvements relating to brake shoes for railway vehicles |
GB794926A (en) * | 1955-10-20 | 1958-05-14 | Dowty Equipment Ltd | Improvements in and relating to aircraft braking mechanism |
GB905884A (en) * | 1957-12-20 | 1962-09-12 | Henschel Werke Ges Mit Beschra | Improvements in and relating to brake shoes or blocks |
GB1025881A (en) * | 1961-04-12 | 1966-04-14 | Girling Ltd | Improvements in disc brakes |
GB1180406A (en) * | 1966-03-01 | 1970-02-04 | Caterpillar Tractor Co | Brake Lining and Cooling Means |
GB1242781A (en) * | 1968-05-28 | 1971-08-11 | Metpro Dev Company Proprietary | Brake block |
GB1418591A (en) * | 1973-01-05 | 1975-12-24 | Shimano Industrial Co | Brake blocks and shoes |
-
1982
- 1982-08-02 IT IT5359982U patent/IT8253599V0/en unknown
-
1983
- 1983-06-08 DE DE19838316745D patent/DE8316745U1/en not_active Expired
- 1983-06-16 GB GB08316380A patent/GB2125125A/en not_active Withdrawn
- 1983-06-16 FR FR8310273A patent/FR2531168A3/en active Granted
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB488382A (en) * | 1936-02-11 | 1938-07-06 | Pietro Smalzi | Improvements in brake blocks or linings with a view to increasing their adherence |
GB477703A (en) * | 1936-07-27 | 1938-01-05 | Fibrax Ltd | Brake blocks, particularly for use on cycle brakes |
GB772989A (en) * | 1954-09-15 | 1957-04-17 | Westinghouse Air Brake Co | Improvements relating to brake shoes for railway vehicles |
GB794926A (en) * | 1955-10-20 | 1958-05-14 | Dowty Equipment Ltd | Improvements in and relating to aircraft braking mechanism |
GB905884A (en) * | 1957-12-20 | 1962-09-12 | Henschel Werke Ges Mit Beschra | Improvements in and relating to brake shoes or blocks |
GB1025881A (en) * | 1961-04-12 | 1966-04-14 | Girling Ltd | Improvements in disc brakes |
GB1180406A (en) * | 1966-03-01 | 1970-02-04 | Caterpillar Tractor Co | Brake Lining and Cooling Means |
GB1242781A (en) * | 1968-05-28 | 1971-08-11 | Metpro Dev Company Proprietary | Brake block |
GB1418591A (en) * | 1973-01-05 | 1975-12-24 | Shimano Industrial Co | Brake blocks and shoes |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2576074A1 (en) * | 1985-01-11 | 1986-07-18 | Ferodo Ltd | IMPROVEMENTS TO THE CLUTCH TRIM |
US4726455A (en) * | 1985-01-11 | 1988-02-23 | Ferodo Limited | Clutch facings |
US5238091A (en) * | 1990-09-29 | 1993-08-24 | Aisin Kako Kabushiki Kaisha | Brake band for automatic transmission |
US6035991A (en) * | 1996-12-11 | 2000-03-14 | Advanced Friction Materials, Inc. | Blocked slot clutch plate lining |
WO1998050710A1 (en) * | 1997-05-05 | 1998-11-12 | Heru Prasanta Wijaya | Grooved brake shoe |
DE19751914A1 (en) * | 1997-11-22 | 1999-05-27 | Itt Mfg Enterprises Inc | Brake shoe for friction brake, with friction lining on support |
US20160108982A1 (en) * | 2013-05-15 | 2016-04-21 | Otsuka Chemical Co., Ltd. | Friction material and friction material for use in drum brake |
Also Published As
Publication number | Publication date |
---|---|
FR2531168A3 (en) | 1984-02-03 |
GB8316380D0 (en) | 1983-07-20 |
FR2531168B3 (en) | 1984-06-29 |
IT8253599V0 (en) | 1982-08-02 |
DE8316745U1 (en) | 1983-10-13 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |