CN209758920U - Electric hoist with overload protection - Google Patents
Electric hoist with overload protection Download PDFInfo
- Publication number
- CN209758920U CN209758920U CN201822051106.0U CN201822051106U CN209758920U CN 209758920 U CN209758920 U CN 209758920U CN 201822051106 U CN201822051106 U CN 201822051106U CN 209758920 U CN209758920 U CN 209758920U
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- CN
- China
- Prior art keywords
- gear transmission
- helical gear
- gear
- transmission
- output 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 - Fee Related
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- Transmission Devices (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The utility model discloses an electric block with overload protection, including motor, reducing gear box, clutch, chain guide device, hoisting accessory and dust catcher, be equipped with one-level helical gear transmission and second grade helical gear transmission in the reducing gear box, one-level helical gear transmission input gear is connected with motor output shaft transmission, the coaxial fixed arrangement of one-level helical gear transmission output gear and second grade helical gear transmission input gear, second grade helical gear transmission output gear empty sleeve is on second grade helical gear transmission output shaft right side, and is equipped with clutch on this output gear both ends shaft section, hoisting accessory rotates to be connected in second grade helical gear transmission output shaft left side. The utility model discloses simple structure, transmission are accurate, and motor and transmission system are impaired when can preventing to overload effectively, improve electric block's fail safe nature.
Description
Technical Field
The utility model relates to an electric block, concretely relates to electric block with overload protection belongs to hoisting machinery technical field.
Background
The electric chain hoist is a light and small hoisting device and is widely applied to industrial and mining enterprises, storage wharfs, production and assembly lines and other places. At present, a conventional small-sized chain electric hoist consists of a motor, a speed reducing mechanism and a chain wheel, when the motor works, a driving shaft of the motor drives the chain wheel to rotate through the speed reducing mechanism, and the chain wheel realizes the ascending or descending of an article through a chain. However, the small-sized hoist is often lack of a protection device for preventing overload, and in the actual operation process, when hanging articles are overloaded or the articles rise to the top and are not stopped in time, the motor and the transmission system are damaged, the safety and reliability are poor, and great potential safety hazards exist.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the defects in the prior art, and provides an electric hoist with overload protection, which has simple structure and accurate transmission, can effectively prevent the damage of a motor and a transmission system during overload, and improves the safety and reliability of the electric hoist.
In order to achieve the above purpose, the utility model adopts the technical scheme that: an electric block with overload protection comprises a motor 1, a reduction gearbox 2, a clutch device 3, a chain guide device 4, a hoisting assembly 5 and a dust collector 6, wherein: the hoisting assembly 5 comprises a chain wheel 51, a chain 52 wound on the chain wheel 51, a buffer stop 53 and a hook 54 which are connected in sequence, a primary bevel gear transmission 21 and a secondary bevel gear transmission 22 are arranged in the reduction gearbox 2, an input shaft of the primary bevel gear transmission 21 is in transmission connection with an output shaft of the motor 1 through a coupler, the output gear of the primary helical gear transmission 21 and the input gear of the secondary helical gear transmission 22 are sequentially fixed in the middle of the output shaft of the primary helical gear transmission 21 from right to left, the output gear of the secondary bevel gear transmission 22 is sleeved on the right side of the output shaft of the secondary bevel gear transmission 22 in an empty way, the clutch device 3 is arranged on the shaft sections at the two ends of the output gear of the secondary bevel gear transmission 22, the chain wheel 51 is fixed on the left side of the output shaft of the secondary bevel gear transmission 22, the dust collector 6 is arranged on the inner side of the reduction gearbox 2, and the chain guide device 4 is further arranged on the chain wheel 51.
Further, the motor 1 is an electromagnetic brake motor.
Furthermore, the clutch device 3 comprises a clutch gear which is set as an output gear of the second-stage helical gear transmission 22, friction discs which are distributed on two sides of the clutch gear, and friction plates which are positioned between the friction discs and two ends of the clutch gear, wherein the friction discs and the friction discs are in spline connection with the output shaft of the second-stage helical gear transmission 22, and a compression nut which is used for extruding the friction discs to enable the friction discs to clamp the clutch gear is arranged on the output shaft of the second-stage helical gear transmission 22.
Further, the output gear of the primary bevel gear transmission 21 and the input gear of the secondary bevel gear transmission 22 adopt a dual gear structure.
The utility model discloses the beneficial effect who brings is: the utility model relates to an electric block with overload protection, its reduction gears is simple reasonable, the transmission is accurate, and motor and transmission system are impaired when can preventing effectively from overloading, improve electric block's fail safe nature.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a schematic view of the transmission structure of the present invention.
In the figure: the device comprises a motor 1, a reduction gearbox 2, a primary bevel gear transmission 21, a secondary bevel gear transmission 22, a clutch 3, a chain guide 4, a hoisting assembly 5, a chain wheel 51, a chain 52, a buffer stop 53, a lifting hook 54 and a dust collector 6.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, so that the advantages and features of the present invention can be more easily understood by those skilled in the art. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without inventive step, are within the scope of the present invention.
As shown in fig. 1, the present embodiment provides an electric hoist with overload protection, which includes an electric motor 1, a reduction gearbox 2, a clutch device 3, a chain guide device 4, a hoisting assembly 5 and a dust collector 6, wherein the hoisting assembly 5 includes a chain wheel 51, a chain 52 wound on the chain wheel 51, a buffer stop 53 and a hook 54 which are connected in sequence; a primary bevel gear transmission 21 and a secondary bevel gear transmission 22 are arranged in the reduction gearbox 2, wherein an input shaft of the primary bevel gear transmission 21 is in transmission connection with an output shaft of the motor 1 through a coupler, preferably, the motor adopts an electromagnetic brake motor, and the braking effect is rapid and reliable; the output gear of the first-stage helical gear transmission 21 and the input gear of the second-stage helical gear transmission 22 are fixedly arranged in the middle of the output shaft of the first-stage helical gear transmission 21 from right to left in sequence, and preferably, the output gear of the first-stage helical gear transmission 21 and the input gear of the second-stage helical gear transmission 22 adopt a duplex gear structure; the chain wheel 51 is fixedly arranged at the left side of the output shaft of the secondary bevel gear transmission 22, and the output gear of the secondary bevel gear transmission 22 is sleeved at the right side of the output shaft of the secondary bevel gear transmission 22 in an empty manner; the clutch device 3 is arranged on output shafts at two ends of an output gear of the secondary bevel gear transmission 22, a connecting thread and a spline are arranged on the right side of the output shaft, the clutch device 3 comprises a clutch gear serving as the output gear of the secondary bevel gear transmission 22, friction discs symmetrically distributed on two sides of the clutch gear and friction discs positioned between the friction discs and two ends of the clutch gear, the friction discs and the friction discs are connected to the output shaft of the secondary bevel gear transmission 22 through the spline, the friction discs are extruded through screwing a gland nut to enable the friction discs to clamp the clutch gear, and the output shaft of the secondary bevel gear transmission 22 rotates through friction force between the clutch gear and the friction discs during working, so that a chain wheel; the dust collector 6 is arranged on the inner side of the reduction gearbox 2 and is used for cleaning impurities such as dust and the like in the reduction gearbox and prolonging the service life of the gear; the chain wheel 51 is further provided with a chain guide device 4 for guiding the movement of the chain 52.
During normal work, the motor drives the speed reducing mechanism to work after being started, the speed reducing mechanism transmits the reduced rotating speed to the chain wheel through an output shaft of the speed reducing mechanism and drives the chain wheel to rotate, and the chain moves under the guiding action of the guiding device so as to drive the lifting hook to ascend to lift heavy objects; when overload occurs, a slipping separation phenomenon can be generated between the clutch gear and the friction plate on the secondary bevel gear transmission output shaft, and at the moment, the secondary bevel gear transmission output gear, namely the clutch gear, is in an idle running state, so that the friction plate cannot be driven to drive the secondary bevel gear transmission output shaft to rotate together, and the motor and the transmission system are protected from being damaged.
The above description is only for the preferred embodiment of the present invention, and not limited to the present invention, and any modifications or additions, equivalent replacements, or similar improvements made to the described embodiments in the technical field within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. The utility model provides an electric block with overload protection, includes motor (1), reducing gear box (2), clutch (3), leads chain device (4), jack-up subassembly (5) and dust catcher (6), its characterized in that: the hoisting assembly (5) comprises a chain wheel (51), a chain (52) wound on the chain wheel (51), a buffer stop block (53) and a lifting hook (54) which are sequentially connected, a first-stage helical gear transmission (21) and a second-stage helical gear transmission (22) are arranged in the reduction gearbox (2), an input shaft of the first-stage helical gear transmission (21) is in transmission connection with an output shaft of the motor (1), an output gear of the first-stage helical gear transmission (21) and an input gear of the second-stage helical gear transmission (22) are sequentially fixed in the middle of an output shaft of the first-stage helical gear transmission (21) from right to left, an output gear of the second-stage helical gear transmission (22) is freely sleeved on the right side of the output shaft of the second-stage helical gear transmission (22), the clutch device (3) is arranged on shaft sections at two ends of the output gear of the second-stage helical gear, The friction plates are distributed on two sides of the clutch gear, the friction plates are located between the friction plates and two ends of the clutch gear, the friction plates and the friction plates are in spline connection with an output shaft of the secondary bevel gear transmission (22), a compression nut used for extruding the friction plates to enable the friction plates to clamp the clutch gear is arranged on the output shaft of the secondary bevel gear transmission (22), the chain wheel (51) is fixed on the left side of the output shaft of the secondary bevel gear transmission (22), the dust collector (6) is installed on the inner side of the reduction gearbox (2), and the chain wheel (51) is further provided with a chain guide device (4).
2. An electric block with overload protection according to claim 1, characterized in that: the motor (1) adopts an electromagnetic brake motor.
3. An electric block with overload protection according to claim 1, characterized in that: the output gear of the first-stage helical gear transmission (21) and the input gear of the second-stage helical gear transmission (22) adopt a duplex gear structure form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822051106.0U CN209758920U (en) | 2018-12-07 | 2018-12-07 | Electric hoist with overload protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822051106.0U CN209758920U (en) | 2018-12-07 | 2018-12-07 | Electric hoist with overload protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209758920U true CN209758920U (en) | 2019-12-10 |
Family
ID=68746348
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822051106.0U Expired - Fee Related CN209758920U (en) | 2018-12-07 | 2018-12-07 | Electric hoist with overload protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209758920U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115123949A (en) * | 2022-07-27 | 2022-09-30 | 浙江鼎琛起重设备科技有限公司 | Novel electric hoist |
-
2018
- 2018-12-07 CN CN201822051106.0U patent/CN209758920U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115123949A (en) * | 2022-07-27 | 2022-09-30 | 浙江鼎琛起重设备科技有限公司 | Novel electric hoist |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191210 Termination date: 20201207 |