CA2007569C - Electric hoist - Google Patents
Electric hoist Download PDFInfo
- Publication number
- CA2007569C CA2007569C CA 2007569 CA2007569A CA2007569C CA 2007569 C CA2007569 C CA 2007569C CA 2007569 CA2007569 CA 2007569 CA 2007569 A CA2007569 A CA 2007569A CA 2007569 C CA2007569 C CA 2007569C
- Authority
- CA
- Canada
- Prior art keywords
- drum
- carrying frame
- gear
- housing
- electric hoist
- 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
Landscapes
- Retarders (AREA)
- Load-Engaging Elements For Cranes (AREA)
- Carriers, Traveling Bodies, And Overhead Traveling Cranes (AREA)
Abstract
The electric hoist comprises 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. The housing is connected to the drum by means of a gear diaphragm and a gear ring. The carrying frame is connected by means of a connecting shaft and spline joints to the output shaft of a stem, and the gear ring is shaped as an integral part of the drum.
Description
ELECTRIC HOIST
This invention relates to an electric hoist which can be used in material handling machines.
A known drum drive for cable which comprises a planetary reduction gear disposed inside a housing, which is connected to an electric motor disposed in front of the face of a drum, mounted on a carrying frame, which is connected to the planetary reduction gear by means of stem of its last stage. The housing is fastened to the drum by means of flanges (1).
The drawbacks of this known drive lie in its comparatively low reliability, resulting from the rigid connection between the planetary reduction gear, and in the necessity of overdimensioning of the drum, determined by the scheme of the transmission of the torque from the electric motor to the first stage of the planetary reduction gear.
It is therefore a general object of this invention to develop an electric hoist with increased reliability of the drum drive and with a design with reduced specific consumption of metals.
This object is achieved by an electric hoist comprising a drum, seated in a carrying frame, and an electric motor, mounted in front of the face of the carrying frame and connected kinematically to a planetary reduction gear, the housing of which is disposed totally inside the drum. According to the invention, the housing is connected to the drum via a gear diaphragm and a gear ring.
The carrying frame is connected by means of a connecting shaft and spline joints to the output shaft of a stem, and the gear ring is shaped as an integral part of the drum.
The advantages of the electric hoist according to the invention lie in its increased reliability, resulting from the elastic connection between the output shaft and the carrying frame by means of a connecting shaft, as well as in the reduced overall sizes of the drum, resulting from the kinematic connection between the shaft of the electric motor and the first stage of the planetary reduction gear.
For a better understanding of the invention, reference should be made to the accompanying drawing, in which there is shown a partial cross-sectional view of an electric hoist according to the invention.
The electric hoist comprises a planetary reduction gear 1 which is disposed inside a housing 2, connected by means of a clutch 3 to an electric motor 4 disposed in front of the face side of the drum 5, which is seated in the carrying frame 6. This carrying frame 6 is connected to the planetary reduction gear 1 by means of the stem 7 of the last planetary stage 8. The housing 2 is connected to the drum 5 by means of the gear diaphragm 9 and the gear ring 10. By means of output shaft 11, connecting shaft 12 and spline joints 13 and 14 the stem 7 is connected to the carrying frame 6. The gear ring 10 is shaped as an integral part of the drum 5, which is seated by means of bearings 15 in the carrying frame 6.
The electric hoist according to the invention operates as follows:
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 and, from there, via the gear diaphragm 9 to the gear ring 10. Since the stem 7 is connected by means of the spline joints 13 and 14 and the connecting shaft 12 to the carrying frame 6, the drum 5 receives a smooth rotational motion.
This invention relates to an electric hoist which can be used in material handling machines.
A known drum drive for cable which comprises a planetary reduction gear disposed inside a housing, which is connected to an electric motor disposed in front of the face of a drum, mounted on a carrying frame, which is connected to the planetary reduction gear by means of stem of its last stage. The housing is fastened to the drum by means of flanges (1).
The drawbacks of this known drive lie in its comparatively low reliability, resulting from the rigid connection between the planetary reduction gear, and in the necessity of overdimensioning of the drum, determined by the scheme of the transmission of the torque from the electric motor to the first stage of the planetary reduction gear.
It is therefore a general object of this invention to develop an electric hoist with increased reliability of the drum drive and with a design with reduced specific consumption of metals.
This object is achieved by an electric hoist comprising a drum, seated in a carrying frame, and an electric motor, mounted in front of the face of the carrying frame and connected kinematically to a planetary reduction gear, the housing of which is disposed totally inside the drum. According to the invention, the housing is connected to the drum via a gear diaphragm and a gear ring.
The carrying frame is connected by means of a connecting shaft and spline joints to the output shaft of a stem, and the gear ring is shaped as an integral part of the drum.
The advantages of the electric hoist according to the invention lie in its increased reliability, resulting from the elastic connection between the output shaft and the carrying frame by means of a connecting shaft, as well as in the reduced overall sizes of the drum, resulting from the kinematic connection between the shaft of the electric motor and the first stage of the planetary reduction gear.
For a better understanding of the invention, reference should be made to the accompanying drawing, in which there is shown a partial cross-sectional view of an electric hoist according to the invention.
The electric hoist comprises a planetary reduction gear 1 which is disposed inside a housing 2, connected by means of a clutch 3 to an electric motor 4 disposed in front of the face side of the drum 5, which is seated in the carrying frame 6. This carrying frame 6 is connected to the planetary reduction gear 1 by means of the stem 7 of the last planetary stage 8. The housing 2 is connected to the drum 5 by means of the gear diaphragm 9 and the gear ring 10. By means of output shaft 11, connecting shaft 12 and spline joints 13 and 14 the stem 7 is connected to the carrying frame 6. The gear ring 10 is shaped as an integral part of the drum 5, which is seated by means of bearings 15 in the carrying frame 6.
The electric hoist according to the invention operates as follows:
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 and, from there, via the gear diaphragm 9 to the gear ring 10. Since the stem 7 is connected by means of the spline joints 13 and 14 and the connecting shaft 12 to the carrying frame 6, the drum 5 receives a smooth rotational motion.
Claims
1. An electric hoist comprising a drum, seated in a carrying frame, and an electric motor, mounted in a face of the carrying frame and connected kinematically to a planetary reduction gear, a housing of which is disposed totally inside the drum, wherein the housing is connected by means of a gear diaphragm and a gear ring to the drum, and the gear ring is shaped as integral part of the drum, while the carrying frame is connected by means of a connecting shaft and spline joints to an output shaft of stem.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2007569 CA2007569C (en) | 1990-01-11 | 1990-01-11 | Electric hoist |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2007569 CA2007569C (en) | 1990-01-11 | 1990-01-11 | Electric hoist |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2007569A1 CA2007569A1 (en) | 1991-07-11 |
| CA2007569C true CA2007569C (en) | 2000-04-04 |
Family
ID=4143991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2007569 Expired - Fee Related CA2007569C (en) | 1990-01-11 | 1990-01-11 | Electric hoist |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2007569C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110914189A (en) * | 2017-07-18 | 2020-03-24 | 意大利德纳运动***有限责任公司 | Reel/ring gear assembly for a winch with a gear transmission |
-
1990
- 1990-01-11 CA CA 2007569 patent/CA2007569C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110914189A (en) * | 2017-07-18 | 2020-03-24 | 意大利德纳运动***有限责任公司 | Reel/ring gear assembly for a winch with a gear transmission |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2007569A1 (en) | 1991-07-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |