GB2125125A - Brake shoe liner for drum brakes - Google Patents

Brake shoe liner for drum brakes Download PDF

Info

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Withdrawn
Application number
GB08316380A
Other versions
GB8316380D0 (en
Inventor
Giorgio Monziani
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.)
IPERCO ITALIAN PERMAFUSE CORP
Original Assignee
IPERCO ITALIAN PERMAFUSE 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 IPERCO ITALIAN PERMAFUSE CORP filed Critical IPERCO ITALIAN PERMAFUSE CORP
Publication of GB8316380D0 publication Critical patent/GB8316380D0/en
Publication of GB2125125A publication Critical patent/GB2125125A/en
Withdrawn legal-status Critical Current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
    • 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

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)

**WARNING** start of CLMS field may overlap end of DESC **. 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. CLAIMS
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.
GB08316380A 1982-08-02 1983-06-16 Brake shoe liner for drum brakes Withdrawn GB2125125A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (9)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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
IT8253599V0 (en) 1982-08-02
FR2531168B3 (en) 1984-06-29
GB8316380D0 (en) 1983-07-20
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)