GB2240531A - Electric hoist - Google Patents
Electric hoist Download PDFInfo
- Publication number
- GB2240531A GB2240531A GB9002331A GB9002331A GB2240531A GB 2240531 A GB2240531 A GB 2240531A GB 9002331 A GB9002331 A GB 9002331A GB 9002331 A GB9002331 A GB 9002331A GB 2240531 A GB2240531 A GB 2240531A
- Authority
- GB
- United Kingdom
- Prior art keywords
- drum
- gear
- reduction gear
- support frame
- planetary reduction
- 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.)
- Granted
Links
- 230000008878 coupling Effects 0.000 claims abstract description 7
- 238000010168 coupling process Methods 0.000 claims abstract description 7
- 238000005859 coupling reaction Methods 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/02—Driving gear
- B66D1/14—Power transmissions between power sources and drums or barrels
- B66D1/22—Planetary or differential gearings, i.e. with planet gears having movable axes of rotation
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Retarders (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
An electric hoist comprising a rotary drum (5) seated in a stationary support frame (6), and an electric motor (4) mounted at an end face of the support frame (6) and coupled to drive a planetary reduction gear (1) having a rotary housing (2) which is disposed totally inside the drum (5) and which is connected by means of a gear diaphragm (9) and a cooperable gear ring (10) to rotate the drum (5), the gear ring (10) being formed as an integral part of the drum (5), and wherein the stationary support frame (6) is connected by means of a connecting shaft (12) and spline couplings (13, 14) thereon to a stationary planetary cage of the planetary reduction gear (1). <IMAGE>
Description
1 Electric Hoist This invention relates to an electric hoist, which can be
used for example in a material handling machine.
GFR Patent Specification No. 2601244 discloses a known rotary drum drive for a cable, which comprises a planetary reduction gear disposed inside a housing. The planetary reduction gear is connected to an electric motor disposed in front of a face of the drum, mounted on a support frame which is connected to the planetary reduction gear by means of an axis of its last stage. The housing is fastened to the drum by means of flanges.
Drawbacks of this known drive lie in its comparatively low reliability, resulting from the rigid connection between the planetary reduction gear and the support frame, and from the necessity of overdimensioning the drum, this being necessitated by the means of transmission of torque from the electric motor to the first stage of the planetary reduction gear.
According to the present invention there is provided an electric hoist comprising a rotary drum seated in a stationary support frame, and an electric motor mounted at an end face of the support frame and coupled to drive a planetary reduction gear having a rotary housing which is disposed totally inside the drum and which is connected by means of a gear diaphragm and a cooperable gear ring to rotate the drum, the gear ring being formed as an integral part of the drum, and wherein the stationary support frame is connected by means of a connecting shaft and spline couplings thereon to a stationary planetary cage of the planetary reduction gear.
A preferred embodiment of the present invention provides an electric hoist with increased reliability of the drum drive, and with a design with reduced size i and therefore reduced consumption of metal.
The preferred embodiment provides an increased reliability resulting from an elastic (or at least nonrigid) connection between the stationary planetary cage of the planetary reduction gear on the one hand, and the stationary support frame on the other hand, by means of the aforementioned connecting shaft.
Moreover, a reduced overall size of the drum may result from the particularly provided drive connection between the shaft of the electric motor and the first stage of the planetary reduction gear.
For a better understanding of the present invention and to show how it may be put into effect, reference will now be made by way of example to the accompanying drawing, which is a partial crosssectional view of a preferred embodiment of an electric hoist according to the present invention.
The illustrated electric hoist comprises a threestage planetary reduction gear 1 which is disposed inside a rotary housing 2 forming the outer rotary annulus of the planetary reduction gear 1. Three central sun gears of the three stages of the planetary reduction gear 1 are aligned with one another and connected by means of a clutch 3 to an electric motor 4 mounted beyond one end face of a rotary drum 5 upon which a cable is to be wound. The rotary housing 2 is disposed totally inside the drum 5.
The motor 4 is mounted at an end face of a stationary support frame 6, and the drum 5 is seated within the stationary support frame 6. An elastic (or at least non-rigid) connection is made between the support frame 6 and the planetary reduction gear 1 by means of a connecting shaft 12 having splined couplings 13 and 14 at its opposite ends. The splined coupling 13 connects the shaft 12 to the final stage of the planetary reduction gear 1, this end of the shaft 12 0 1 4 1 1 being splined to a stationary socket 11 forming part of the stationary planetary cage of the planet wheels of this last planetary stage 8. A single planet wheel of this last planetary stage 8 is shown in section, this wheel rotating about a fixed shaft 7 and transmitting rotation from the associated central sun gear to the rotary housing 2 in a reverse direction and at a lower rotational speed when the hoist is in operation.
This described non-rigid connection between the support frame 6 and the planetary reduction gear 1 provides a torsionally resilient coupling between the final gear stage 8 and the support frame 6, thus reducing shocks during operation of the hoist.
At its opposite end, the rotary housing 2 is connected to the drum 5 by means of a gear diaphragm 9 and a cooperable gear ring 10 which is formed as an integral part of the drum 5. The rotary housing 2 is locked to the drum 5 in order to rotate the latter, by the gear diaphragm 9 and the gear ring 10 being frontally locked to rotate together at the same speed. The drum 5 is mounted by means of bearings 15 within the support frame 6 for rotation thereon.
The described electric hoist operates as follows:
Cable is wound on to, or unwound from, the rotary drum 5 when the torque of the electric motor 4 is transmitted via clutch 3, and the stages of the planetary reduction gear 1, to the housing 2. This torque is then transmitted by the gear diaphragm 9 and the gear ring 10 to the drum 5. Since the stationary planetary cage for the last stage 8 of the planetary reduction gear 1 is connected resiliently to the support frame 6 by means of the connecting shaft 12 and its spline couplings 13 and 14 as has been described, the drum 5 receives a smooth rotational motion.
-1
Claims (4)
1. An electric hoist comprising a rotary drum seated in a stationary support frame, and an electric motor mounted at an end face of the support frame and coupled to drive a planetary reduction gear having a rotary housing which is disposed totally inside the drum and which is connected by means of a gear diaphragm and a cooperable gear ring to rotate the drum, the gear ring being formed as an integral part of the drum, and wherein the stationary support frame is connected by means of a connecting shaft and spline couplings thereon to a stationary planetary cage of the planetary reduction gear.
2. An electric hoist according to claim 1, wherein the planetary reduction gear is a multi-stage reduction gear and said stationary planetary cage which is connected to the stationary support frame is a cage of the final stage of the planetary reduction gear.
3. An electric hoist substantially as hereinbefore described with reference to the single fgure of the accompanying drawing.
4. An electric hoist comprising a drum, seated in a carrying frame, and an electric motor, mounted in the face of the carrying frame and connected kinematically to a planetary reduction gear, the housing of which is disposed totally inside the drum, wherein the housing (2) is connected by means of a gear diaphragm (9) and a gear ring (10) to the drum (5), and the gear ring (10) is shaped as integral part of the drum (5), while the carrying frame (6) is connected by means of the connecting shaft (12) and spline joints (13) and (14) to the output shaft (11) of stem (7).
Published 1991 at The Patent Office, Stair House. 66/71 High Holborn. London WCIR477P. Further copies rnay be obtained from Sales Branch. Unit 6. Nine Mile FoinL Cwmfelinfach. Cross Keys, Newport. NPI 7HZ. Printed by Multiplex techniques ltd. St Mary Cray, Kent.
0 1
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4000145A DE4000145C2 (en) | 1990-01-04 | 1990-01-04 | Electric pulling device |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB9002331D0 GB9002331D0 (en) | 1990-04-04 |
| GB2240531A true GB2240531A (en) | 1991-08-07 |
| GB2240531B GB2240531B (en) | 1994-02-09 |
Family
ID=6397623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9002331A Expired - Fee Related GB2240531B (en) | 1990-01-04 | 1990-02-02 | Electric hoist |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE4000145C2 (en) |
| FR (1) | FR2657338B3 (en) |
| GB (1) | GB2240531B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2458851C1 (en) * | 2011-03-09 | 2012-08-20 | Открытое акционерное общество "Кыштымское машиностроительное объединение" | Winch |
| CN106006377B (en) * | 2016-05-25 | 2017-10-27 | 中船第九设计研究院工程有限公司 | A kind of drive device of crane hoisting mechanism |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2601244C2 (en) * | 1976-01-15 | 1984-03-15 | Mannesmann AG, 4000 Düsseldorf | Drum drive, especially for a cable winch |
| DD251965A1 (en) * | 1986-08-07 | 1987-12-02 | Maschf & Eisengiesserei Veb | DRUM DRIVE IN PARTICULAR FOR PORTRAIT CRANES |
-
1990
- 1990-01-04 DE DE4000145A patent/DE4000145C2/en not_active Expired - Fee Related
- 1990-01-19 FR FR909000636A patent/FR2657338B3/en not_active Expired - Lifetime
- 1990-02-02 GB GB9002331A patent/GB2240531B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| GB9002331D0 (en) | 1990-04-04 |
| DE4000145A1 (en) | 1991-07-11 |
| DE4000145C2 (en) | 1993-10-07 |
| FR2657338A1 (en) | 1991-07-26 |
| FR2657338B3 (en) | 1992-05-15 |
| GB2240531B (en) | 1994-02-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20040202 |