USRE33576E - Coupling assembly and friction shoe therefor - Google Patents
Coupling assembly and friction shoe therefor Download PDFInfo
- Publication number
- USRE33576E USRE33576E US07/384,146 US38414689A USRE33576E US RE33576 E USRE33576 E US RE33576E US 38414689 A US38414689 A US 38414689A US RE33576 E USRE33576 E US RE33576E
- Authority
- US
- United States
- Prior art keywords
- backing plate
- friction
- pad
- tube
- driving bar
- 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 - Fee Related
Links
Images
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
- F16D49/00—Brakes with a braking member co-operating with the periphery of a drum, wheel-rim, or the like
- F16D49/14—Brakes with a braking member co-operating with the periphery of a drum, wheel-rim, or the like shaped as a fluid-filled flexible member actuated by variation of the fluid pressure
-
- 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
- F16D25/00—Fluid-actuated clutches
- F16D25/04—Fluid-actuated clutches in which the fluid actuates an elastic clutching, i.e. elastic actuating member, e.g. a diaphragm or a pneumatic tube
- F16D25/042—Fluid-actuated clutches in which the fluid actuates an elastic clutching, i.e. elastic actuating member, e.g. a diaphragm or a pneumatic tube the elastic actuating member rotating with the clutch
- F16D25/046—Fluid-actuated clutches in which the fluid actuates an elastic clutching, i.e. elastic actuating member, e.g. a diaphragm or a pneumatic tube the elastic actuating member rotating with the clutch and causing purely radial movement
-
- 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
- F16D69/04—Attachment of linings
- F16D69/0416—Attachment of linings specially adapted for curved linings
-
- 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
- F16D2069/005—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces having a layered structure
- F16D2069/007—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces having a layered structure comprising a resilient layer
-
- 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
- F16D69/04—Attachment of linings
- F16D2069/0425—Attachment methods or devices
- F16D2069/0441—Mechanical interlocking, e.g. roughened lining carrier, mating profiles on friction material and lining carrier
-
- 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
- F16D69/04—Attachment of linings
- F16D2069/0425—Attachment methods or devices
- F16D2069/045—Bonding
- F16D2069/0466—Bonding chemical, e.g. using adhesives, vulcanising
-
- 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
- F16D69/04—Attachment of linings
- F16D2069/0425—Attachment methods or devices
- F16D2069/0483—Lining or lining carrier material shaped in situ
Definitions
- This invention relates to a coupling assembly functioning as a brake or clutch, comprising a drum, a set of circumferentially arranged friction shoes and an annular, fluid extensible tube or bladder element for radially actuating the shoes. More particularly, the invention relates to an assembly having a series of shoes each having a driving bar formed intricately on each shoe which coacts with corresponding grooves formed in the tube.
- An object of this invention is to provide a new and improved coupling assembly of the character described having a plurality of friction shoes each of which is made of a backing plate with a friction pad secured to one side and a driving bar secured to the other side of said plate and also formed integrally with the plate and pad.
- Each driving bar is received in a corresponding groove in the tube element for improved transfer of torque from the shoe to the tube element.
- Another object of the invention is to provide a friction shoe for a coupling of the character described having a backing plate with a friction pad secured to one side thereof and a driving bar formed of friction material secured centrally to the other side of said backing plate and additional driving bar means located at each end of said backing plate which may be formed in part of friction material for improved torque transfer from the shoe to the tube element.
- Another object of the invention is to provide an improved friction shoe for a coupling assembly of the character described, providing simplicity, economy and durability of construction, and facilitating replacement and repair thereof.
- FIG. 1 is a fragmentary side view of the clutch and brake assembly of this invention with parts broken away.
- FIG. 2 is a sectional view taken along the lines 2--2 of FIG. 1.
- FIG. 3 is a sectional view taken along the lines 3--3 of FIG. 2.
- FIG. 4 is a top view of the shoe member.
- FIG. 5 is an enlarged view taken along the line 5--5 of FIG. 4.
- FIG. 6 is a partial view similar to FIG. 5 of another embodiment of the shoe member.
- the coupling 10 includes a drum 11 and a rim assembly 12.
- the drum 11 and rim assembly 12 are rotatable relative to each other about an axis of rotation.
- the coupling 10 can be used as a brake or a clutch. If it is desired to use the coupling 10 as a brake, one of the members 11 or 12 will be fixed and if is desired to use a coupling 10 as a clutch, both of the members 11 and 12 will be rotatable. Accordingly, the term coupling as used herein will refer to either a clutch or a brake assembly.
- An annular fluid expandable tube or bladder element 14 made of reinforce elastomer is secured to the annular surface 13 of the rim assembly 12.
- the wall 16 of the tube 14 is formed of a thick layer of elastomer having a series of axially extending lugs 17 formed therein by axially extending grooves 18 which are preferably arcuate in shape in cross section.
- the grooves 18 are equally spaced apart around the circumference of the tube.
- Each of the lugs 17 includes an axially extending hole 19 for purposes hereinafter discussed.
- a plurality of shoe members 20 are connected to the wall 16 of the tube by pins 21 which extend through the holes 19 in the tube and through pairs of aligned holes 22 in the side flanges 23 of the backing plate 24 of the shoes 20.
- the pins 21 are preferably provided with a suitable heat 25 at one end and a removable head 26 at the other end to permit any given shoe to be removed from the tube for replacement.
- each lug 17 includes a single hole 19 so that each shoe member 20 is supported by a pair of lugs 17 and by a pair of pins 21 extending through adjacent holes 19 in adjacent lugs 17.
- the tube element 14 includes an inlet 27 which communicates with the interior of the tube element 14 to permit pressurized fluid to be injected into the tube element causing the movement of the wall 16 in a radial direction so that the friction shoes 20 are moved into contact with the outer surface of the drum 11 to thereby couple the drum 11 and the rim assembly 12 in a well known manner.
- pressurized fluid is released from the interior of the tube 14 the tube will deflate and the friction shoes 20 will move radially to disengage from the drum 11 to thereby uncouple the drum 11 and the rim assembly 12.
- the shoe members 20 have been designed to maximize the torque carrying capacity of the coupling and to provide an economical replaceable shoe construction.
- the side flanges 23 and backing plate 24 are preferably made of metal and the latter is generally arcuate in shape in a direction circumferentially of the drum 11.
- the ends 28 of the backing plates 24 extend at a angle to the backing plate 24 and may be connected to the ends of the shoe flanges 23.
- At least one hole 29 is provided, preferably in a circumferentially central location, in the backing plate 24.
- the hole is shown as circular in shape, one or more holes may be provided of rectangular or other shapes since the purpose of the hole 29 is to permit the friction material, when making the shoe member 20, to flow into the mold cavity forming the driving bar 30 while the friction pad 31 is formed.
- the driving bar 30 extends generally axially to the shoe member 20 preferably from one side flange 23 to the other. Friction material exists in the hole 29 joining the driving bar 30 with the friction pad 31 and with the backing plate 24. As shown in FIGS. 4 and 5, the radial dimension or thickness of the driving bar 30 and the friction pad 31 are both substantially larger than the thickness of the metal backing plate 24.
- the ends 33 of the shoe member 20 are preferably formed of friction material extending radially from the contact surface 32 of the pad 31 to form ends 33.
- the ends 33 terminate in preferably rounded projections 34 which terminate along juncture lines 35 with the ends 28 of the backing plate.
- the driving bars are preferably arcuate in shape in cross section as shown in FIG. 5. It is seen that the shoe members 20 are formed of a unitary structure between the backing plate 24, the shoe flanges 23, the driving bar 30, and the ends 33 of the friction pad 31.
- the bars 30 have a cross sectional shape which precisely fits and complements the cross sectional shape of the grooves 18 in the bladder 14 and each extends coextensively with the other.
- the ends 33 of the friction pads 31 extend into grooves 18 so that adjacent ends 33 of adjacent shoes 20 partially fill common grooves into which the ends 33 of the adjacent pads 31 extend.
- the ends 33 of each shoe can act as driving bars in addition to the centrally located driving bar 30 and also minimize exposure of the tube to heat generated at the friction interface between the shoes 20 and the drum 11.
- FIG. 6 shows an alternate construction in which one or more tabs 36 and 36a extend from the backing plate 24 and are joined at one end to the a backing plate along a juncture line 37.
- One tab 36 extends from the surface of the backing plate at an angle opposite to the angle at which the other tab 36A extends.
- the tabs 36 and 36A protrude within the confines of the driving bar 30 to mechanically interlock the backing plate and the driving bar 30.
- tabs 36 and 36A may be combined into a continuous tab formed into the confines of the driving bar 30 during forming of the backing plates 24 and/or formed into the confines of the driving bar 30 by molding pressure during the molding of the friction pad 31.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Braking Arrangements (AREA)
Abstract
Description
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/384,146 USRE33576E (en) | 1987-04-20 | 1989-07-21 | Coupling assembly and friction shoe therefor |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/040,507 US4795013A (en) | 1987-04-20 | 1987-04-20 | Coupling assembly and friction shoe therefor |
US07/384,146 USRE33576E (en) | 1987-04-20 | 1989-07-21 | Coupling assembly and friction shoe therefor |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/040,507 Reissue US4795013A (en) | 1987-04-20 | 1987-04-20 | Coupling assembly and friction shoe therefor |
Publications (1)
Publication Number | Publication Date |
---|---|
USRE33576E true USRE33576E (en) | 1991-04-23 |
Family
ID=26717126
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/384,146 Expired - Fee Related USRE33576E (en) | 1987-04-20 | 1989-07-21 | Coupling assembly and friction shoe therefor |
Country Status (1)
Country | Link |
---|---|
US (1) | USRE33576E (en) |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1867348A (en) * | 1929-03-02 | 1932-07-12 | American Brake Materials Corp | Friction brake |
US2083989A (en) * | 1935-03-14 | 1937-06-15 | Hoof Brak Corp | Brake |
US2673573A (en) * | 1951-11-27 | 1954-03-30 | Fed Fawick Corp | Fluid distensible actuating means for clutches and brakes |
US3022877A (en) * | 1959-01-19 | 1962-02-27 | Fawick Corp | Assembly for clutches and brakes |
US3064769A (en) * | 1958-04-07 | 1962-11-20 | Bendix Corp | Fastener construction and processes of mounting metal-ceramic compositions |
US3092231A (en) * | 1961-06-29 | 1963-06-04 | Fawick Corp | Diaphragm and wear shoe assembly for clutch or brake |
US4190136A (en) * | 1978-11-13 | 1980-02-26 | Eaton Corporation | Coupling apparatus |
SU721603A1 (en) * | 1978-07-12 | 1980-03-15 | Уральский завод тяжелого машиностроения им. С.Орджоникидзе | Tyre-pneumatic clutch |
US4453621A (en) * | 1982-06-07 | 1984-06-12 | General Motors Corporation | Drum brake shoe and lining assembly and method of making same |
US4552257A (en) * | 1983-10-21 | 1985-11-12 | The Falk Corporation | Overload protection mechanism for clutches |
-
1989
- 1989-07-21 US US07/384,146 patent/USRE33576E/en not_active Expired - Fee Related
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1867348A (en) * | 1929-03-02 | 1932-07-12 | American Brake Materials Corp | Friction brake |
US2083989A (en) * | 1935-03-14 | 1937-06-15 | Hoof Brak Corp | Brake |
US2673573A (en) * | 1951-11-27 | 1954-03-30 | Fed Fawick Corp | Fluid distensible actuating means for clutches and brakes |
US3064769A (en) * | 1958-04-07 | 1962-11-20 | Bendix Corp | Fastener construction and processes of mounting metal-ceramic compositions |
US3022877A (en) * | 1959-01-19 | 1962-02-27 | Fawick Corp | Assembly for clutches and brakes |
US3092231A (en) * | 1961-06-29 | 1963-06-04 | Fawick Corp | Diaphragm and wear shoe assembly for clutch or brake |
SU721603A1 (en) * | 1978-07-12 | 1980-03-15 | Уральский завод тяжелого машиностроения им. С.Орджоникидзе | Tyre-pneumatic clutch |
US4190136A (en) * | 1978-11-13 | 1980-02-26 | Eaton Corporation | Coupling apparatus |
US4453621A (en) * | 1982-06-07 | 1984-06-12 | General Motors Corporation | Drum brake shoe and lining assembly and method of making same |
US4552257A (en) * | 1983-10-21 | 1985-11-12 | The Falk Corporation | Overload protection mechanism for clutches |
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SULP | Surcharge for late payment | ||
PRDP | Patent reinstated due to the acceptance of a late maintenance fee |
Effective date: 19961025 |
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LAPS | Lapse for failure to pay maintenance fees | ||
FP | Lapsed due to failure to pay maintenance fee |
Effective date: 19970108 |
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Free format text: PATENT EXPIRED FOR FAILURE TO PAY MAINTENANCE FEES (ORIGINAL EVENT CODE: EXP.) |