CN216105781U - Novel constant speed brake - Google Patents
Novel constant speed brake Download PDFInfo
- Publication number
- CN216105781U CN216105781U CN202122789825.4U CN202122789825U CN216105781U CN 216105781 U CN216105781 U CN 216105781U CN 202122789825 U CN202122789825 U CN 202122789825U CN 216105781 U CN216105781 U CN 216105781U
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- brake
- pawl
- fixedly connected
- winding drum
- outer cover
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Abstract
The utility model discloses a novel constant-speed brake, which comprises a winding drum, wherein an outer cover is arranged outside the winding drum, a brake piece and an overspeed switch are arranged at the end part of the winding drum, a ratchet wheel is fixedly connected to the periphery of the brake piece, and a pawl matched with the ratchet wheel is rotatably connected to the outer cover; the outer cover is fixedly connected with a traction electromagnet and a fixed plate, an armature of the traction electromagnet is fixedly connected with a brake rope for driving a pawl to rotate, the end part of the brake rope is fixedly connected to one end of the pawl, the other end of the pawl is provided with a return spring, and the other end of the return spring is fixedly connected to the fixed plate; the utility model is used for solving the problems that the mechanical braking device in the prior art can not brake at a constant speed, has unstable braking effect and short service life.
Description
Technical Field
The utility model relates to the technical field of lifting machinery installation protection devices, in particular to a novel constant-speed brake.
Background
The braking system of electric block hoisting mechanism is provided with service brake usually, multiple braking modes such as safety brake and mechanical brake device, wherein mechanical brake sets up the low-speed end at hoisting mechanism, current stopper is fixed connection braking piece, lotus flower dish and ratchet mostly on the reel, be provided with the gyro wheel on the pawl, the pawl keeps the separation with the ratchet all the time under the effect of extension spring, the gyro wheel laminates all the time on lotus flower dish appearance profile, the reel rotates and can drives the lotus flower dish rotatory, the pawl can be fixed swing motion around the installation axle. When the lifting stall occurs, the rotating speed of the lotus disc is increased, and the roller on the pawl can jump, so that the swing amplitude of the pawl is increased, and when the swing amplitude of the pawl is increased to a certain degree, the pawl can be meshed with the outer teeth of the ratchet wheel, so that the brake piece pressed on the winding drum and the winding drum can interact, and the braking purpose is achieved. However, the brake effect of the brake is unstable, the brake cannot be immediately operated when the winding drum stalls, and the tension spring is in a tension state whenever the winding drum stalls, and particularly, the stress state of the tension spring is continuously changed when the winding drum runs, so that fatigue damage is easy to occur, and the service life of the brake is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a novel constant-speed brake, which is used for solving the problems that a mechanical brake device in the prior art cannot perform constant-speed braking, is unstable in braking effect and short in service life.
In order to achieve the purpose, the utility model adopts the following technical scheme: a novel constant-speed brake comprises a winding drum, wherein an outer cover is arranged outside the winding drum, a brake piece and an overspeed switch are arranged at the end part of the winding drum, a ratchet wheel is fixedly connected to the periphery of the brake piece, and a pawl matched with the ratchet wheel is rotatably connected to the outer cover; the outer cover is fixedly connected with a traction electromagnet and a fixed plate, an armature of the traction electromagnet is fixedly connected with a brake rope for driving a pawl to rotate, the end part of the brake rope is fixedly connected to one end of the pawl, the other end of the pawl is provided with a reset spring, and the other end of the reset spring is fixedly connected to the fixed plate.
Optionally, the pawl is fixedly connected with a limiting plate, the outer cover is provided with a proximity switch matched with the limiting plate, and when the pawl is meshed with the ratchet wheel, the limiting plate is in contact with the proximity switch.
Optionally, the housing is further rotatably connected with a fixed pulley, and the brake rope on the armature is fixedly connected to the pawl after passing around the fixed pulley.
Optionally, the return spring is an extension spring.
The novel constant speed brake has the following advantages:
(1) when the rotating speed of the winding drum exceeds a set value of the overspeed switch, the traction electromagnet actuates the armature, the brake rope pulls the pawl, the pawl is meshed with the ratchet wheel to achieve the purpose of emergency braking, the set value of the overspeed switch is adjustable, the winding drum can be braked immediately after overspeed, the response speed is high, and the braking effect is stable.
(2) The proximity switch controls the power supply of the drum motor, when the pawl is meshed with the ratchet wheel, the limiting plate is contacted with the proximity switch, the power supply of the drum motor is cut off, and secondary damage is avoided.
(3) The fixed pulley can adjust the direction of the brake rope, so that the traction electromagnet can select a proper installation position.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
The utility model is further described below with reference to the accompanying drawings.
As shown in figure 1, the novel constant-speed brake comprises a winding drum 1, an outer cover 2 is arranged outside the winding drum 1, a brake piece 3 and an overspeed switch are arranged at the end part of the winding drum 1, the overspeed switch can set the overspeed fixed value of the winding drum 1, a ratchet wheel 4 is fixedly connected to the periphery of the brake piece 3, and a pawl 5 matched with the ratchet wheel 4 is rotatably connected to the outer cover 2. The outer cover 2 is fixedly connected with a traction electromagnet 6, a fixed pulley 9 and a fixed plate 10, an armature 7 of the traction electromagnet 6 is fixedly connected with a brake rope 8 for driving the pawl 5 to rotate, the end part of the brake rope 8 is fixedly connected to the bottom of the pawl 5 after bypassing the fixed pulley 9, the fixed pulley 9 can adjust the direction of the brake rope 8, the traction electromagnet 6 can select a proper installation position, and the structure of the brake is more compact. The top of pawl 5 is provided with reset spring 11, and reset spring 11's other end fixed connection is on fixed plate 10, and reset spring 11 is extension spring, and reset spring 11 and brake rope 8 set up in the same one side of pawl 5. Still fixedly connected with limiting plate 12 on the pawl 5, be provided with on the dustcoat 2 with limiting plate 12 matched with proximity switch 13, proximity switch 13 control reel 1 motor's power, when pawl 5 and ratchet 4 interlock, limiting plate 12 and proximity switch 13 contact, the power stops to supply power to reel 1 motor.
The working principle of the utility model is as follows: in the figure 1, the clockwise rotation of the winding drum 1 is a lifting operation, the anticlockwise rotation of the winding drum 1 is a descending operation, when the overspeed switch detects that the rotating speed of the anticlockwise rotation of the winding drum 1 exceeds a set overspeed fixed value, the master control box sends a working signal to the traction electromagnet 6, the traction electromagnet 6 attracts the armature 7, so that the brake rope 8 is driven to pull the pawl 5 leftwards, the pawl 5 clockwise rotates for a certain angle and then is occluded with the ratchet wheel 4, a brake block 3 pressed on the winding drum 1 and the winding drum 1 are enabled to interact, and the purpose of emergency braking is achieved. Meanwhile, the reset spring 11 is elongated, the limiting plate 12 is in contact with the proximity switch 13, the master control box can receive a power-off signal, the power supply of the motor of the winding drum 1 is cut off, the motor does not continue to output torque, secondary damage is avoided, and during braking, the winding drum 1 can only rotate clockwise and cannot rotate anticlockwise. After emergency braking, a maintenance worker checks the fault reason and then maintains the equipment, after the maintenance is finished, the power supply is recovered, at the moment, the winding drum 1 can only rotate clockwise, the traction electromagnet 6 loosens the armature 7, the pawl 5 rotates anticlockwise under the action of the pulling force of the return spring 11, the pawl 5 is separated from the ratchet wheel 4, the limiting plate 12 is separated from the proximity switch 13, the braking mode is released, and the equipment can normally lift and work; after the pawl 5 rotates anticlockwise for a certain angle, the brake rope 8 is tensioned, the pawl 5 is reset, and the winding drum 1 can recover to normally operate. The overspeed fixed value of this application can freely set for, and application scope is extensive, and braking response speed is fast, and braking effect is stable, and reset spring 11 only is in tensile state when the braking moreover, and reset spring 11 under the normal condition is only in slight tensile state, and fatigue damage is difficult for appearing, can prolong the life of stopper.
The embodiments described above are only a part of the embodiments of the present invention, and not all of them. All other embodiments that can be obtained by a person skilled in the art based on the embodiments of the present invention without any creative effort belong to the protection scope of the present invention.
Claims (4)
1. A novel constant speed brake is characterized in that: the winding drum comprises a winding drum, wherein an outer cover is arranged outside the winding drum, a brake piece and an overspeed switch are arranged at the end part of the winding drum, a ratchet wheel is fixedly connected to the periphery of the brake piece, and a pawl matched with the ratchet wheel is rotatably connected to the outer cover; the outer cover is fixedly connected with a traction electromagnet and a fixed plate, an armature of the traction electromagnet is fixedly connected with a brake rope for driving a pawl to rotate, the end part of the brake rope is fixedly connected to one end of the pawl, the other end of the pawl is provided with a reset spring, and the other end of the reset spring is fixedly connected to the fixed plate.
2. The new constant velocity brake of claim 1, wherein: the pawl is fixedly connected with a limiting plate, the outer cover is provided with a proximity switch matched with the limiting plate, and when the pawl is meshed with the ratchet wheel, the limiting plate is contacted with the proximity switch.
3. The new constant velocity brake of claim 1, wherein: the outer cover is also rotatably connected with a fixed pulley, and a brake rope on the armature iron is fixedly connected to the pawl after bypassing the fixed pulley.
4. A new constant velocity brake as claimed in any one of claims 1 to 3, characterized in that: the reset spring is an extension spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122789825.4U CN216105781U (en) | 2021-11-15 | 2021-11-15 | Novel constant speed brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122789825.4U CN216105781U (en) | 2021-11-15 | 2021-11-15 | Novel constant speed brake |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216105781U true CN216105781U (en) | 2022-03-22 |
Family
ID=80717138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122789825.4U Active CN216105781U (en) | 2021-11-15 | 2021-11-15 | Novel constant speed brake |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216105781U (en) |
-
2021
- 2021-11-15 CN CN202122789825.4U patent/CN216105781U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220906 Address after: 453400 north of Wei'Er Road, Changyuan County, Xinxiang City, Henan Province Patentee after: SHANGHAI PENG HEAVY MACHINERY CO.,LTD. HENAN BRANCH Address before: 453400 200m north of Weizhuang Town, Changyuan City, Xinxiang City, Henan Province Patentee before: Henan Huagong Intelligent Equipment Co.,Ltd. |