US3825100A - Hoist with constant pressure one way brake - Google Patents

Hoist with constant pressure one way brake Download PDF

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Publication number
US3825100A
US3825100A US00262909A US26290972A US3825100A US 3825100 A US3825100 A US 3825100A US 00262909 A US00262909 A US 00262909A US 26290972 A US26290972 A US 26290972A US 3825100 A US3825100 A US 3825100A
Authority
US
United States
Prior art keywords
brake
hoist
plates
disc
shaft
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 - Lifetime
Application number
US00262909A
Other languages
English (en)
Inventor
H Freeman
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.)
Duff Norton Co Inc
Original Assignee
Eaton 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 Eaton Corp filed Critical Eaton Corp
Priority to US00262909A priority Critical patent/US3825100A/en
Priority to DE2330126A priority patent/DE2330126A1/de
Priority to GB2838773A priority patent/GB1403655A/en
Priority to JP48066434A priority patent/JPS4949359A/ja
Publication of US3825100A publication Critical patent/US3825100A/en
Application granted granted Critical
Assigned to YALE INDUSTRIAL PRODUCTS, INC., A CORP OF DE reassignment YALE INDUSTRIAL PRODUCTS, INC., A CORP OF DE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: EATON CORPORATION, AN OH CORP.
Assigned to CITIBANK, N.A. reassignment CITIBANK, N.A. SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: YALE INDUSTRIAL PRODUCTS, INC.
Assigned to DUFF-NORTON COMPANY, INC., A DE CORP. reassignment DUFF-NORTON COMPANY, INC., A DE CORP. MERGER (SEE DOCUMENT FOR DETAILS). DECEMBER 20, 1989 - DELAWARE Assignors: DUFF-NORTON ACTUATORS, INC., DUFF-NORTON HOISTS, INC., DUFF-NORTON ROTARY UNIONS, INC., YALE INDUSTRIAL PRODUCTS, INC.
Anticipated expiration legal-status Critical
Assigned to DUFF-NORTON COMPANY reassignment DUFF-NORTON COMPANY RELEASE OF ASSIGNMENT OF SECURITY. Assignors: CITIBANK, N.A.
Expired - Lifetime 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
    • F16D7/00—Slip couplings, e.g. slipping on overload, for absorbing shock
    • F16D7/02—Slip couplings, e.g. slipping on overload, for absorbing shock of the friction type
    • F16D7/024—Slip couplings, e.g. slipping on overload, for absorbing shock of the friction type with axially applied torque limiting friction surfaces
    • F16D7/025—Slip couplings, e.g. slipping on overload, for absorbing shock of the friction type with axially applied torque limiting friction surfaces with flat clutching surfaces, e.g. discs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D3/00—Portable or mobile lifting or hauling appliances
    • B66D3/18—Power-operated hoists
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
    • B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
    • B66D5/12—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes with axial effect
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D2700/00—Capstans, winches or hoists
    • B66D2700/02—Hoists or accessories for hoists
    • B66D2700/026—Pulleys, sheaves, pulley blocks or their mounting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D2700/00—Capstans, winches or hoists
    • B66D2700/07—Brakes with axial thrust for winches, hoists or similar devices

Definitions

  • ABSTRACT A low cost hoist operated by a motor on whose shaft is an overrunning clutch that rotates a load brake disc when the motor shaft rotates in load lowering direction, the disc'engaging between a pair of brake plates acting with constant frictional pressure against opposed surfaces of the disc and enabling the hoist to support a load. Heat that is developed by slip friction will be divided between the brake plates when the motor operates to; lower a load, and one of those plates is in heatconducting surface contact with the hoist frame, controlling temperatures due to the slip friction and reducing deterioration of the brake and hoist.
  • the brake disc is formed by two disc portions in contact and mounted on the clutch through keying portions so staggered as to offer surfaces that locate the disc in a predetermined axial position on the clutch. I V
  • a hoist will comprise a pair of opposed brake plates that are mounted in aligned relation to the axis of an operating shaft that is rotated by a hoist motor, and that acts through speed reduction gearing to apply high torque to a rotatable load shaft on the hoist,the operating shaft being reversible in operation whereby to rotate the load shaft in load lifting-and load lowering directions.
  • These brake plates are secured against rotationrelatively to the hoist frame, and are spring pressed so as to apply constant braking pressure against opposed surfaces of a friction brake disc between the plates.
  • An overrunning clutch on the operating shaft rotates the brake disc in slip friction relation to the pair of brake plates when the shaft rotates in load lowering direction, each of those plates. accepting a portion of the frictional energy that is due to the relatively high speed of the operating shaft.
  • I mount one of the brake plates in heat conducting surface contact with an end wall of the hoist frame, while the other of those plates has a surface that may be exposed to air.
  • I divide between two brake plates the heat that is developed by the slip friction of a brake disc rotating while under constant pressure by the plates, and l dissipate through the plates an amount of heat that will permit the brake temperature to remain with an acceptable range.
  • I may mount the brake disc through keying portions so formed as toact also for holding the disc in a predetermined axial'position on the operating shaft. More particularly, I may assemble a plurality of disc portions in contact with one another to form the brake disc, the keying portions then being formed in a staggered relation so as to engage an opening in each disc portion while also engaging a contacting surface of an opposed disc portion.
  • FIG. 1 shows a longitudinal section of a hoist utilizing my invention
  • FIG. 2 shows an end view of the hoist brake and clutch assembly
  • FIG. 3 shows a section on the line 3-3 in FIG. 2, and further showing parts of the hoist
  • FIG. 4 shows a section on the line 44 in FIG. 3;
  • FIG. 5 shows an exploded perspective view of parts of the clutch and brake assembly.
  • FIG. 1 of the drawing I show a hoist H in which a clutch and brake assembly, indicated generally by the numeral 10, forms a part of the operating mechanism of the" hoist.
  • the hoist mechanism further comprises a reversible motor M whose'shaft is connected through speed reduction gearing 11 to a load shaft'l2 that rotates to lift and to lower a load, the clutch and brake assembly 10 being connected to an end portion 13 of the motor shaft that extends outwardly through an opening in an end wall 14 on the hoist frame.
  • the assembly 10 includes anoverrunning clutch 15 having a bushing 16 that is splined as at 17 to the end portion 13 of the 7 motor shaft.
  • a clutch housing 18 is mounted through two series of roller bearings 19, 20 to rotate on the bushing 16, and a medial series of clutch rollers 21 is assembled between housing 18 and ramp surfaces 22 on the bushing 16.
  • the rollers 21 and ramp surfaces 22- will act in a manner that is usual in overrunning clutches, but it should be understood here that the direction in which rollers 21 will act to lock bushing 16 to housing 18 will be the load lowering direction in which shaft 13 rotates, the rollers 21 effecting release when shaft 13 rotates in load lifting direction.
  • a pair of hub portions 23, 24 is mounted on the clutch housing 18 so as to form in effect an integral part of the housing, as by a press fit on the housing surface.
  • the hub portions 23, 24 are complementary in shape and lprefe'r that they be identical, as best seen in FIG. 5.
  • each hub portion 23, 24 has a circular part 25 adapted to be pressed onto the clutch housing 18, one
  • the portions 28 and 28a that form the brake disc will be embraced by brake plates 31, 32, those plates having clearance openings for the hub portions 23, 24.
  • the brake plate 31 is formed to lie in surface contact with the end wall 14 of the hoist frame, as indicated at 33, and is formed with openings 34 that lugs 35 on end wall 14 will engage so that plate 31 cannot rotate on the hoist.
  • Plate 31 may be formed on its periphery with a slotted portion 35 for coacting with a stud and pin arrangement 36 with which wall 14 can be equipped, should that be found helpful for holding the brake. and clutch construction in position while the hoistis being assembled.
  • a clutch and brake plate 31 is further formed on its periphery with finger portions 37 that are bent in axial direction to act as guides for the brake plate 32.
  • the brake plate 32 is formed on its periphery with portions 38 having openings adapted to slide on the guide fingers 37 of plate 31.
  • Coil springs 39 act between the plate portions 38 and cotter pins 40 on guide fingers 37, pressing plates 31 and 32 toward one another and causing those plates to apply a constant frictional pressure against the opposed frictional surfaces 30, 30a of the brake disc that is formed by disc portions 28, 28a. 1
  • the clutch and brake assembly 10 comprising the brake plates 31, 32, disc ,28, 28a, clutch 15 and their associated parts, can readily be installed as a unit on the hoist H so as to form a part of the hoist operating mechanism. That unit may be secured in position through the application of a snap-ring 41 to a groove on the end portion of motor shaft 13. As shown, a cover 42 may be applied to enclose the assembly 10.
  • a hoist load brake may be relatively small in size when it need not accept the full amount of the load shaft torque.
  • a brake will operate at relatively high speeds and may develop large amounts of heat due to slip friction when the brake is one that engages under constant pressure.
  • the heat that is. developed will be divided between the brake plates 31, 32, but at merely one surface of each plate while an opposed surface of plate 31 effectively dissipates heat through the hoist frame and a surface of r plate 32 is exposed to air.
  • a hoist having a main frame on which a hoist motor is mounted, an operating shaft rotated by the motor and acting through speed reduction gearing to apply high torque to a rotatable load shaft, the operating shaft being reversible in operation whereby to lift and to lower a load on the load shaft, a pair of opposed brake plates mounted in aligned relation to the axis of said operating shaft and secured against rotating motion relatively to the hoist frame, one plate of said pair of opposed brake plates being directly mounted to the frame of the hoist and having an opening for accepting an end portionon the operating shaft, friction material forming a pairof brake discs assembled in position intermediate said brake plates, spring means pressing said pair of brake plates and causing each of those plates to apply constant braking pressure against a surface of said brake discs, an overrunning clutch assembly on said end portion of said shaft, including a clutch housing forming a first and second keying member mounted adjacent to each other but angularly offset from each other, said first and second keying members engaging key matching openings in said first and second brake discs
  • first and second key members are a pair of adjacently mounted hexagonally shaped members angularly offset from each other and each of said brake discs being formed to have ahexagonally shaped opening allowing said brake discs to be fitted onto the first aligned relation to the'axis of said operating shaft and secured against rotating motion relatively to the hoist frame, one plate of said pair of opposed brake plates having an opening for accepting an end portion on the operating shaft, friction material'forming a brake disc assembled in position intermediate said brake plates, spring means pressing said pair of brake plates and causing each of those plates to apply constant braking pressure against a surface of said brake disc, an overrunning clutch on said end portion of said shaft, including a clutch part acting when said shaft rotates in load lowering direction to rotate said brake disc in slip friction relation to said pair of brake plates, each of those plates accepting a portion of the frictional energy that is due to the high speed of the operating shaft while opposed by the effect of the constant braking pressure, said overrunning clutch comprising a bush
  • said hoist frame comprises an end wall against which said one plate of said pair of brake plates lies in longitudinal surface contact, and including means engaging between said frame end wall, said one brake plate, and

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Braking Arrangements (AREA)
US00262909A 1972-06-14 1972-06-14 Hoist with constant pressure one way brake Expired - Lifetime US3825100A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US00262909A US3825100A (en) 1972-06-14 1972-06-14 Hoist with constant pressure one way brake
DE2330126A DE2330126A1 (de) 1972-06-14 1973-06-13 Motorwinde
JP48066434A JPS4949359A (cg-RX-API-DMAC7.html) 1972-06-14 1973-06-14
GB2838773A GB1403655A (en) 1972-06-14 1973-06-14 Hoist with constant pressure brake

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00262909A US3825100A (en) 1972-06-14 1972-06-14 Hoist with constant pressure one way brake

Publications (1)

Publication Number Publication Date
US3825100A true US3825100A (en) 1974-07-23

Family

ID=22999587

Family Applications (1)

Application Number Title Priority Date Filing Date
US00262909A Expired - Lifetime US3825100A (en) 1972-06-14 1972-06-14 Hoist with constant pressure one way brake

Country Status (4)

Country Link
US (1) US3825100A (cg-RX-API-DMAC7.html)
JP (1) JPS4949359A (cg-RX-API-DMAC7.html)
DE (1) DE2330126A1 (cg-RX-API-DMAC7.html)
GB (1) GB1403655A (cg-RX-API-DMAC7.html)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3966024A (en) * 1975-01-23 1976-06-29 Warner Electric Brake & Clutch Company Helical spring clutch
US4356901A (en) * 1980-09-15 1982-11-02 Rockwell International Corporation Support for a series of friction discs
US4463933A (en) * 1980-11-25 1984-08-07 Columbus Mckinnon Corporation Clutch/brake mechanism
US4513843A (en) * 1982-12-01 1985-04-30 Carlfors Bruk E Bjorlund & Co. Railway car retarder for shunting purposes
US4884783A (en) * 1988-02-12 1989-12-05 Thorn, Inc. Hoist with oil cooled brake
US4949824A (en) * 1988-07-08 1990-08-21 Hayes Industrial Brake, Inc. High production, torque limiting, one-way clutch
US20040168865A1 (en) * 2003-01-22 2004-09-02 Ismo Kuivamaki Torque controlled brake
US9188166B2 (en) 2011-12-22 2015-11-17 Ringspann Gmbh Return stop
US9488232B1 (en) * 2015-06-16 2016-11-08 Columbus Mckinnon Corporation Externally adjustable clutch

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54157956A (en) * 1978-06-01 1979-12-13 Hitachi Ltd Electric chain block
DE102013003954B4 (de) * 2013-03-08 2014-09-25 Ringspann Gmbh Rücklaufsperre mit Drehmomentbegrenzung

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3966024A (en) * 1975-01-23 1976-06-29 Warner Electric Brake & Clutch Company Helical spring clutch
US4356901A (en) * 1980-09-15 1982-11-02 Rockwell International Corporation Support for a series of friction discs
US4463933A (en) * 1980-11-25 1984-08-07 Columbus Mckinnon Corporation Clutch/brake mechanism
US4513843A (en) * 1982-12-01 1985-04-30 Carlfors Bruk E Bjorlund & Co. Railway car retarder for shunting purposes
US4884783A (en) * 1988-02-12 1989-12-05 Thorn, Inc. Hoist with oil cooled brake
US4949824A (en) * 1988-07-08 1990-08-21 Hayes Industrial Brake, Inc. High production, torque limiting, one-way clutch
US20040168865A1 (en) * 2003-01-22 2004-09-02 Ismo Kuivamaki Torque controlled brake
US7077245B2 (en) 2003-01-22 2006-07-18 Kci Konecranes Plc Torque controlled brake
US9188166B2 (en) 2011-12-22 2015-11-17 Ringspann Gmbh Return stop
US9488232B1 (en) * 2015-06-16 2016-11-08 Columbus Mckinnon Corporation Externally adjustable clutch
CN107076220A (zh) * 2015-06-16 2017-08-18 哥伦布麦金农公司 可外部调节的离合器
CN107076220B (zh) * 2015-06-16 2019-05-03 哥伦布麦金农公司 可外部调节的离合器

Also Published As

Publication number Publication date
JPS4949359A (cg-RX-API-DMAC7.html) 1974-05-13
GB1403655A (en) 1975-08-28
DE2330126A1 (de) 1974-01-03

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Legal Events

Date Code Title Description
AS Assignment

Owner name: YALE INDUSTRIAL PRODUCTS, INC., A CORP OF DE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:EATON CORPORATION, AN OH CORP.;REEL/FRAME:004254/0553

Effective date: 19831230

AS Assignment

Owner name: CITIBANK, N.A., NEW YORK

Free format text: SECURITY INTEREST;ASSIGNOR:YALE INDUSTRIAL PRODUCTS, INC.;REEL/FRAME:005013/0855

Effective date: 19881215

AS Assignment

Owner name: DUFF-NORTON COMPANY, INC., A DE CORP.

Free format text: MERGER;ASSIGNORS:DUFF-NORTON ACTUATORS, INC.;DUFF-NORTON HOISTS, INC.;DUFF-NORTON ROTARY UNIONS, INC.;AND OTHERS;REEL/FRAME:005498/0146

Effective date: 19891010

AS Assignment

Owner name: DUFF-NORTON COMPANY, NORTH CAROLINA

Free format text: RELEASE OF ASSIGNMENT OF SECURITY.;ASSIGNOR:CITIBANK, N.A.;REEL/FRAME:006847/0903

Effective date: 19931130