CN212050322U - Electric hoist - Google Patents
Electric hoist Download PDFInfo
- Publication number
- CN212050322U CN212050322U CN202020219880.2U CN202020219880U CN212050322U CN 212050322 U CN212050322 U CN 212050322U CN 202020219880 U CN202020219880 U CN 202020219880U CN 212050322 U CN212050322 U CN 212050322U
- Authority
- CN
- China
- Prior art keywords
- conical rotor
- motor
- centrifugal
- turntable
- braking motor
- 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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Abstract
The utility model relates to an electric hoist, which comprises a conical rotor brake motor, a winding drum, a reduction gearbox, a controller, a lifting hook and an overload limiter; a rotating shaft of the conical rotor braking motor is provided with a circular turntable which is coaxially arranged with the conical rotor braking motor and fixedly connected with the conical rotor braking motor, two centrifugal arms which are symmetrically arranged are arranged on the far shaft side of one side surface of the turntable, the centrifugal arms are arc-shaped, one end of each centrifugal arm is rotatably connected with the turntable, and the other ends of the centrifugal arms are mutually connected through a spring; and a brake shoe is arranged at the arc-shaped top of the centrifugal arm, and a stroke gap is reserved between the friction surface of the brake shoe and the inner wall of the shell of the conical rotor brake motor. The utility model discloses the overspeed decline when can prevent electric block hoist and mount goods.
Description
Technical Field
The utility model relates to an electric block technical field especially relates to an electric block.
Background
The electric hoist is widely used for hoisting goods and mainly comprises a conical rotor brake motor, a winding drum, a reduction gearbox, a controller and a lifting hook. The existing electric hoist is generally provided with an overload limiter, when hoisted goods are overloaded, an alarm can be given, after a period of use, the overload limiter can be out of order and can not give an alarm when being overloaded, when the weight of the hoisted goods exceeds the braking capacity of a conical rotor braking motor, the hoisted goods can be lowered at an overspeed, and potential safety hazards exist.
SUMMERY OF THE UTILITY MODEL
The utility model overcomes prior art's is not enough, provides an electric block that descends when can prevent to hoist and mount goods hypervelocity.
The utility model discloses a realize through following technical scheme: an electric hoist comprises a conical rotor braking motor, a winding drum, a reduction gearbox, a controller, a lifting hook and an overload limiter; the controller is arranged outside the conical rotor braking motor, the lifting hook is connected with the winding drum through a steel wire rope, and the overload limiter is arranged on the steel wire rope; the conical rotor brake motor and the overload limiter are electrically connected with the controller; a rotating shaft of the conical rotor braking motor is provided with a circular turntable which is coaxially arranged with the conical rotor braking motor and is fixedly connected with the conical rotor braking motor, and the far shaft side of one side surface of the turntable is provided with two centrifugal arms which are symmetrically arranged; the centrifugal arm is arc-shaped, one end of the centrifugal arm is rotationally connected with the turntable, and the other end of the centrifugal arm is connected with the turntable through a spring; and a brake shoe is arranged at the arc-shaped top of the centrifugal arm, and a stroke gap is reserved between the friction surface of the brake shoe and the inner wall of the shell of the conical rotor brake motor.
Further, the device also comprises an operating button, and the operating button is electrically connected with the controller. Used for directly controlling the electric hoist.
The utility model has the advantages that: the rotating shaft of the conical rotor braking motor is provided with the rotating disc, and the rotating disc is provided with the centrifugal arm, the spring and the brake shoe, so that the braking effect can be achieved when the lifting hook descends in an overspeed manner and the rotating shaft of the conical rotor braking motor exceeds a limited rotating speed, the rotating speed is prevented from being further improved, the lifting hook is prevented from descending in an overspeed manner, and the safety of goods and personnel is ensured; the whole device has simple structure.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a sectional view a-a of fig. 1.
In the figure: the brake device comprises a conical rotor brake motor 1, a winding drum 2, a reduction gearbox 3, a controller 4, a lifting hook 5, an overload limiter 6, a steel wire rope 7, a rotating shaft 8, a rotary table 9, a centrifugal arm 10, a spring 11, a brake shoe 12, a shell 13 and an operating button 14.
Detailed Description
As shown in fig. 1-2, an embodiment of the present invention is an electric hoist, including a conical rotor braking motor 1, a winding drum 2, a reduction gearbox 3, a controller 4, a hook 5 and an overload limiter 6; the conical rotor braking motor 1 is arranged at one end of the winding drum 2, the reduction gearbox is arranged at the other end of the winding drum 2, the controller 4 is arranged outside the conical rotor braking motor 1, the lifting hook 5 is connected with the winding drum 2 through a steel wire rope 7, and the overload limiter 6 is arranged on the steel wire rope 7; the conical rotor brake motor 1 and the overload limiter 6 are electrically connected with the controller 4; a rotating shaft 8 of the conical rotor braking motor 1 is provided with a circular turntable 9 which is coaxially arranged with the conical rotor braking motor and fixedly connected with the conical rotor braking motor, and the far shaft side of one side surface of the turntable 9 is provided with two centrifugal arms 10 which are symmetrically arranged; the centrifugal arm 10 is arc-shaped, one end of the centrifugal arm is rotatably connected with the turntable 9, and the other end of the centrifugal arm is connected with each other through a spring 11; and a brake shoe 12 is arranged at the arc-shaped top of the centrifugal arm 10, and a stroke gap is reserved between the friction surface of the brake shoe 12 and the inner wall of a shell 13 of the conical rotor brake motor 1.
In this embodiment, the device further comprises an operation button 14, and the operation button 14 is electrically connected with the controller 4. Used for directly controlling the electric hoist.
The working principle is as follows: when the lifting hook 5 for hoisting goods by the electric hoist descends normally, the winding drum 2 rotates normally, the rotating speed of the winding drum 2 and the rotating shaft 8 of the conical rotor brake motor 1 is lower, the rotating speed of the rotary table 9 is also lower, the centrifugal arm 10 is folded under the action of the spring 11, a stroke gap is reserved between the friction surface of the brake shoe 12 arranged on the centrifugal arm 10 and the inner wall of the shell 13 of the conical rotor brake motor 1 at the moment, and the brake shoe 12 does not play a braking role; when the lifting hook 5 descends in an overspeed manner to drive the rotating shaft 8 of the conical rotor brake motor 1 to rotate at a high speed, and the rotating speed reaches a limited rotating speed, the centrifugal arm 10 overcomes the pulling force of the spring 11 and throws away outwards under the action of centrifugal force, the brake shoe 12 and the inner wall of the shell 13 of the conical rotor brake motor 1 are tightly attached to generate friction force to prevent the rotating disc 9 from rotating, so that the rotating speed is reduced, the rotating speed of the conical rotor brake motor 1 is reduced, the descending speed of the lifting hook 5 is reduced, the lifting hook 5 and goods are ensured not to descend in an overspeed manner, and the safety of goods and personnel.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the creative work should be covered within the scope of the present invention.
Claims (2)
1. An electric hoist comprises a conical rotor braking motor, a winding drum, a reduction gearbox, a controller, a lifting hook and an overload limiter; the controller is arranged outside the conical rotor braking motor, the lifting hook is connected with the winding drum through a steel wire rope, and the overload limiter is arranged on the steel wire rope; the conical rotor brake motor and the overload limiter are electrically connected with the controller; the method is characterized in that: a rotating shaft of the conical rotor braking motor is provided with a circular turntable which is coaxially arranged with the conical rotor braking motor and is fixedly connected with the conical rotor braking motor, and the far shaft side of one side surface of the turntable is provided with two centrifugal arms which are symmetrically arranged; the centrifugal arm is arc-shaped, one end of the centrifugal arm is rotationally connected with the turntable, and the other end of the centrifugal arm is connected with the turntable through a spring; and a brake shoe is arranged at the arc-shaped top of the centrifugal arm, and a stroke gap is reserved between the friction surface of the brake shoe and the inner wall of the shell of the conical rotor brake motor.
2. An electric hoist according to claim 1, characterized in that: the device also comprises an operating button which is electrically connected with the controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020219880.2U CN212050322U (en) | 2020-02-27 | 2020-02-27 | Electric hoist |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020219880.2U CN212050322U (en) | 2020-02-27 | 2020-02-27 | Electric hoist |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212050322U true CN212050322U (en) | 2020-12-01 |
Family
ID=73533465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020219880.2U Expired - Fee Related CN212050322U (en) | 2020-02-27 | 2020-02-27 | Electric hoist |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212050322U (en) |
-
2020
- 2020-02-27 CN CN202020219880.2U patent/CN212050322U/en not_active Expired - Fee Related
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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 |
Granted publication date: 20201201 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |