US3310290A - Braking means for a rotary hoist - Google Patents
Braking means for a rotary hoist Download PDFInfo
- Publication number
- US3310290A US3310290A US454501A US45450165A US3310290A US 3310290 A US3310290 A US 3310290A US 454501 A US454501 A US 454501A US 45450165 A US45450165 A US 45450165A US 3310290 A US3310290 A US 3310290A
- Authority
- US
- United States
- Prior art keywords
- motor
- brake
- hoist
- rotary
- cavity
- 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
Links
- 230000009975 flexible effect Effects 0.000 claims description 4
- 239000012530 fluid Substances 0.000 description 13
- 230000002441 reversible effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000002939 deleterious effect Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 210000001611 motor endplate Anatomy 0.000 description 1
- 210000003813 thumb Anatomy 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
Images
Classifications
-
- 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
- B66D5/24—Operating devices
- B66D5/26—Operating devices pneumatic or hydraulic
-
- 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
- B66D2700/03—Mechanisms with latches or braking devices in general for capstans, hoists or similar devices as well as braking devices actuated electrically or by fluid under pressure
- B66D2700/035—Fluid operated braking devices
Definitions
- This invention generally concerns hoists and, more particularly, an improved structural and functional relationship of a rotary hoist motor and a load braking device.
- An object of the invention is the provision of a hoist body having a hollow casing member providing a common housing for a rotary drive motor and a load brake wherein the motor and the brake are advantageously disposed in closely spaced, coaxial relation to one another.
- Another object is to provide a hoist motor and adjustable load brake in a common housing member whereby the motor and other operating elements of the hoist may be easily assembled and disassembled with respect to the brake without disturbing a preset adjustment of the braking force provided by the brake.
- Another aspect of the invention is the provision of a drum-type brake for a rotary hoist which is supported and journaled by a hoist casing member so that braking forces which are radially applied to the brake drum are borne by the casing member rather than by the motor bearings or other operating parts of the hoist.
- Yet another object is the provision of a hoist which is characterized by light weight and compactness, by economical manufacture and maintenance, and by simplicity and reliability in operation.
- FIG. 1 is a perspective view of a hoist embodying the present invention
- FIG. 2 is a section taken generally along lines 2-2 of FIG. 3;
- FIG. 3 is an enlarged fragmentary section taken generally along lines 3-3 of FIG. 2.
- FIG. 1 illustratues a hoist having a body, indicated in its entirety by numeral 10, including a gear housing 12, a motor housing 14 and a closure member 16. Integrally formed on the exterior of the gear hOusing 12 are two projecting bosses 18 and 20 which respectively provide a fair-lead for a hoist cable 22 and a mount for a load hook 24.
- the load hook 24 and the cable 22 are vertically aligned and are laterally offset from the vertical center line of the hoist body 10.
- the upper end of the cable 22 is connected to a support book 26 by means of a swivel plate 28; and, the support book 26 is adapted to engage with any suitable overhead member, not shown. As best shOWn in FIG.
- the gear housing 12 is substantially bellshaped and houses in its interior rotative drive elements of the hoist.
- a lipped flange 30 of the gear housing 12 matingly receives a radially projecting flange 32 of the motor housing 14 and is attached thereto for ready removal by the threaded fasteners 34.
- a cylindrical cavity 36 extends nearly the full length of the motor housing 14 and is substantially closed at its inner end by a transverse Wall 38 having a central aperture 40 opening therethrough.
- the aforementioned closure member 16 is removably secured to one end of the motor housing 14 by suitable fasteners 42 for closing the outer end of the cavity 36.
- arm 44 Integrally formed with the closure member 16 are arm 44 and a horizontally disposed handle 46, the latter being laterally spaced from the hoist body 10 and intersecting the arm 44 at approximately right angles to form an elbow.
- the closure member 16 may be rotated 180 to facilitate grasping of the handle 46 by a left-handed operator.
- an expansible chamber pressure fluid motor of the conventional rotary vane type is generally designated by numeral 48 and is removably mounted in cavity 36 of the motor housing member 14.
- the motor 48 comprises a cylinder 50 mounting end plates 52 and 54, the latter end plate carrying an antifriction bearing 56 which rotatively journals a hollow driving sleeve extension 58 of the motor rotor 60.
- the construction and operation of this type of pressure fluid motor is well known and need not be described herein in detail.
- a flexible conduit 62 which encircles the cable 22 is coupled to the handle 46 by a suitable fitting 64 and is anchored at its upper end to the swivel plate 28.
- Pressure fluid is supplied from a source, not shown, to a fitting 66 at the upper end of the conduit 62.
- Valve actuating levers 68 and 70 are pivotally mounted near the juncture of the arm 44 and the handle 46 and are alternately depressible for actuating a pair of fluid supply valves, not shown, disposed within the handle 46.
- These supply valves are operable in a conventional manner to communicate motive fluid from conduit 62 to inlet ports of the motor 48 through suitable fluid passages, not shown, in the closure member 16.
- Other passages, not shown, in the motor casing 14 and the closure member 16 return motor exhaust to a bore 72 through the handle 46 for venting the exhaust to atmosphere.
- the hoist operator can effect reversible rotation of the motor 48 and, as will be understood from the following description, the hoist motor can be controlled in this manner for vertically raising and lowering the hoist body 10 and a load attached to the hook 24.
- the rotary power output of the motor 48 is imparted to a pinion shaft 74 which has a splined end '76 held in relatively reciprocable, but nonrotatable relationshi with mating splines on the interior wall of the sleeve extension 58 of the rotor 66.
- the pinion shaft 74 extends coaxially from the motor 48 into the gear housing 12 into rotary driving engagement with the input elements of a conventional speed reducing gear train, not shown, the output element of which rotatively drives a cable reel 77 comprising joined plates 78 and 80.
- the load bearing cable 22 is wound about the reel 77 within an annular groove defined between the plates 78 and 80.
- Plate 78 is journaled by a bearing 82 carried by the gear housing 12; and, plate is journaled by a bearing 84 carried by the transverse wall 38.
- a load brake assembly for the hoist includes a rotary brake drum 86, a brake shoe 88, a brake spring and a brake releasing piston 92.
- the brake drum 86 is located within the cavity 36 generally between the motor end plate 54 and the transverse wall 38 and in coaxial relation with the motor 48 and the pinion shaft 74.
- the brake drum 86 has an internally splined center opening and an extension or boss 94 which is supported and rotatively journaled in the aperture 40 of wall 38 by means of a bearing 96.
- the drum 86 coaxially surrounds the splined end 76 of the pinion shaft 74 in relatively reciprocable, but nonrotatable relationship. As viewed in FIG.
- the brake shoe 8% is in the shape of a reversed C and is pivotally attached at one end to the transverse wall 38 by a pin 98 which penetrates a bent over En of the shoe.
- the other end of the shoe 88 carries a spring guide pin 100 which engages with one end of the brake spring 90 extending into the cavity 38 in line with the shoe 88.
- the curved central portion of the shoe 88 is provided with a replaceable brake liner 102 for frictionally engaging the circumferential Wall of the drum 86 when the spring 90 forcibly biases the shoe 88 against the rim of the drum.
- An adjusting screw 104 bears against the spring 90 and may be turned within the threaded opening 106 in the motor housing 14 to move the spring relative to the shoe 86 thereby to preset the compressive force with which the spring 90 biases the shoe 88 and liner 102 against the drum 86. From the foregoing it will be understood. that the brake is spring applied and may be adjusted to regulate the frictional braking force applied to the rotary drum 86.
- a preferred means for releasing the brake comprises a pressure fluid actuated piston 92 which is shiftable within a cylinder 103 defined by the motor housing 16.
- pressure fluid upon energization of the motor 48 for driving in either direction, pressure fluid, will be directed through suitable passages, not shown, in the motor housing to the cylinder 108 for shifting the piston 92 in a direction to cause a piston stem 110 to compress spring 90 and to pivot the brake shoe 88 and the liner 102 out of braking engagement with the shoe 86.
- the preferred mode of operation of the illustrative hoist is as follows: Assuming that it is desired to lower the hoist body 10 to position the hook 24 for loading,
- valve actuator 70 Upon depression of actuator 70, motive fluid is admitted to the motor 48 for driving the pinion shaft 74, the associated reduction gearing, and the reel 77 in a direction whereby the cable 22 will pay out and the hoist body 10 will travel downwardly. Simultaneously with actuation of the motor 48, it is contemplated that pressure fluid will be supplied to cylinder 102 to force the piston stem 110 against the brake shoe 88 thereby compressing the spring 90 and releasing the brake drum 86 for rotation with the pinion shaft 74 to which it is splined.
- the actuator 70 is released thereby deenergizing the motor 48 and interrupting the fluid supply to the cylinder 108 so that the braking force of the brake spring 90 will be applied radially to the drum 86 by means of the shoe 88 and the liner 102.
- the drum 86 will transmit such braking force to the motor 48 and the reel 77 through the shaft 74.
- the valve actuator 68 is depressed thereby energizing the motor 48 for reverse rotation and releasing the brake assembly to permit the reel 77 to rotate for taking up the cable 22.
- the adjusting screw 104 Prior to operating the hoist, the adjusting screw 104 should be preset Within the opening 106 to effect compression of the spring 90 sufficiently to assure that the braking force applied to the drum 86 is sufiicient to prevent retograde movement of the motor 48, the pinion shaft 74, the reduction gearing, and the reel 77 under conditions of maximum anticipated loading of the hook
- An advantageous feature of this invention is realized by the provision of a brake drum 86 which is independently supported and journaled by a main structural element of the hoist body, i.e. by the transverse wall 38 of the motor housing 16. This is in contradistinction to conventional practice wherein the brake drum is journaled on and supported by the motor drive shaft or by a drive coupling member such as the pinion shaft 74.
- a motor housing member having a cavity which conveniently receives both the hoist motor and the brake assembly.
- the motor 48 and the brake parts 86 and 88 are both disposed in a (common cavity 36 and in closely spaced coaxial relation to one another.
- This arrangement of the motor and the brake is particularly advantageous where minimizing the over-all length of the hoist body is an important design consideration.
- the brake can be located so that the braking force produced thereby is applied to the motor pinion shaft 74 at a point intermediate the ends thereof, i.e. between the driving motor 48 and the driven reduction gearing, thereby greatly reducing normally expected inertia and reactance forces tending to produce potentially damaging torsional stress and deflection in the pinion shaft.
- the disclosed hoist brake assembly having a brake drum 86 journaled independently on a casing member 14 of the hoist body 10 need not be disassembled from the hoist in order to disassemble either or both the motor 48 and the pinion shaft 74 from the hoist.
- To replace or repair the motor 48 it is only necessary to remove the closure member 16 and to withdraw the motor 48 axially from cavity 36 thereby disengaging the splined driving connection between the rotor sleeve extension 58 and the splined end 76 of the pinion shaft 74.
- the gear housing is merely detached from the flange 32 of the motor housing 14 and withdrawn axially thereby disengaging the splined connection between the brake drum 86 and the splined end 76 of the pinion shaft 74.
- the motor 48 and the pinion shaft 74 can-be disassembled from the brake assembly without disassembly of any of the parts of the brake assembly.
- the exemplary hoist is adapted for actuation by pressure fluid, such as compressed air; however, it is not intended that the invention be limited thereto.
- pressure fluid such as compressed air
- an electric motor having suitable controls for effecting reverse rotation and associated solenoid means for releasing the brake shoe 88 could be substituted for the disclosed motor 48 and the brake releasing piston 92, respectively.
- the cable 22 could be replaced by any equivalent flexible tension member such as a chain.
- a rotary hoist comprising:
- housing means having a cavity therein;
- a rotary motor disposed in said cavity
- said brake means being disposed in said cavity; said brake means having a rotary element in brake force transmitting relation with said drive means; and
- said housing means includes a transverse wall defining the closed end of said cavity; said wall being provided with an aperture; said rotary element being disposed between said motor and said wall, and said rotary element being supported and jou-rnaled in said aperture.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US454501A US3310290A (en) | 1965-05-10 | 1965-05-10 | Braking means for a rotary hoist |
GB16190/66A GB1123443A (en) | 1965-05-10 | 1966-04-13 | Rotary hoist |
BE679894D BE679894A (fr) | 1965-05-10 | 1966-04-22 | |
SE06251/66A SE327520B (fr) | 1965-05-10 | 1966-05-06 | |
DE19661431990 DE1431990A1 (de) | 1965-05-10 | 1966-05-06 | Hebezeug |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US454501A US3310290A (en) | 1965-05-10 | 1965-05-10 | Braking means for a rotary hoist |
Publications (1)
Publication Number | Publication Date |
---|---|
US3310290A true US3310290A (en) | 1967-03-21 |
Family
ID=23804865
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US454501A Expired - Lifetime US3310290A (en) | 1965-05-10 | 1965-05-10 | Braking means for a rotary hoist |
Country Status (5)
Country | Link |
---|---|
US (1) | US3310290A (fr) |
BE (1) | BE679894A (fr) |
DE (1) | DE1431990A1 (fr) |
GB (1) | GB1123443A (fr) |
SE (1) | SE327520B (fr) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3452964A (en) * | 1967-08-08 | 1969-07-01 | Lionel Bibeault | Portable lifting and/or spring winding device |
US3858845A (en) * | 1972-03-24 | 1975-01-07 | Hugo Grote | Manually operable lifting apparatus |
DE2513031A1 (de) * | 1975-03-25 | 1976-10-07 | Demag Ag | Hebezeug |
USRE33303E (en) * | 1981-06-25 | 1990-08-21 | Deuer Manufacturing Inc. | Tire lift/carrier |
US4969630A (en) * | 1981-06-25 | 1990-11-13 | Deuer Manufacturing Inc. | Tire lift/carrier |
WO1990015773A2 (fr) * | 1989-06-21 | 1990-12-27 | Sparton Corporation | Ensemble de poulie pour un treuil de levage/transport de pneus |
US5100106A (en) * | 1981-06-25 | 1992-03-31 | Deuer Manufacturing Inc. | Tire lift/carrier |
CN112607643A (zh) * | 2019-11-05 | 2021-04-06 | 杭州富阳鸿祥技术服务有限公司 | 一种多线滑轮装置 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2496754A (en) * | 1945-09-08 | 1950-02-07 | Manning Maxwell & Moore Inc | Suspended type hoist |
FR1150099A (fr) * | 1956-04-27 | 1958-01-07 | Perfectionnement apporté aux palans à moteur | |
US2831554A (en) * | 1951-07-30 | 1958-04-22 | Ingersoll Rand Co | Control device for hoists |
US3184018A (en) * | 1962-12-14 | 1965-05-18 | Gearmatic Co Ltd | Reversible drive assembly including fluid-powered prime mover |
-
1965
- 1965-05-10 US US454501A patent/US3310290A/en not_active Expired - Lifetime
-
1966
- 1966-04-13 GB GB16190/66A patent/GB1123443A/en not_active Expired
- 1966-04-22 BE BE679894D patent/BE679894A/xx unknown
- 1966-05-06 SE SE06251/66A patent/SE327520B/xx unknown
- 1966-05-06 DE DE19661431990 patent/DE1431990A1/de active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2496754A (en) * | 1945-09-08 | 1950-02-07 | Manning Maxwell & Moore Inc | Suspended type hoist |
US2831554A (en) * | 1951-07-30 | 1958-04-22 | Ingersoll Rand Co | Control device for hoists |
FR1150099A (fr) * | 1956-04-27 | 1958-01-07 | Perfectionnement apporté aux palans à moteur | |
US3184018A (en) * | 1962-12-14 | 1965-05-18 | Gearmatic Co Ltd | Reversible drive assembly including fluid-powered prime mover |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3452964A (en) * | 1967-08-08 | 1969-07-01 | Lionel Bibeault | Portable lifting and/or spring winding device |
US3858845A (en) * | 1972-03-24 | 1975-01-07 | Hugo Grote | Manually operable lifting apparatus |
DE2513031A1 (de) * | 1975-03-25 | 1976-10-07 | Demag Ag | Hebezeug |
US4026526A (en) * | 1975-03-25 | 1977-05-31 | Demag Aktiengesellschaft | Hoisting gear |
USRE33303E (en) * | 1981-06-25 | 1990-08-21 | Deuer Manufacturing Inc. | Tire lift/carrier |
US4969630A (en) * | 1981-06-25 | 1990-11-13 | Deuer Manufacturing Inc. | Tire lift/carrier |
US5100106A (en) * | 1981-06-25 | 1992-03-31 | Deuer Manufacturing Inc. | Tire lift/carrier |
WO1990015773A2 (fr) * | 1989-06-21 | 1990-12-27 | Sparton Corporation | Ensemble de poulie pour un treuil de levage/transport de pneus |
US5415377A (en) * | 1989-06-21 | 1995-05-16 | Sparton Corporation | Sheave assembly for a tire lift/carrier winch |
WO1990015773A3 (fr) * | 1989-06-21 | 2004-04-29 | Sparton Corp | Ensemble de poulie pour un treuil de levage/transport de pneus |
CN112607643A (zh) * | 2019-11-05 | 2021-04-06 | 杭州富阳鸿祥技术服务有限公司 | 一种多线滑轮装置 |
CN112607643B (zh) * | 2019-11-05 | 2024-02-02 | 杭州谦泰五金机械制造有限公司 | 一种多线滑轮装置 |
Also Published As
Publication number | Publication date |
---|---|
DE1431990A1 (de) | 1969-10-09 |
BE679894A (fr) | 1966-10-03 |
SE327520B (fr) | 1970-08-24 |
GB1123443A (en) | 1968-08-14 |
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