CN112960582A - Utilize ratchet pawl to prevent too fast environmental protection electromechanical device hoist device of whereabouts - Google Patents
Utilize ratchet pawl to prevent too fast environmental protection electromechanical device hoist device of whereabouts Download PDFInfo
- Publication number
- CN112960582A CN112960582A CN202110251990.6A CN202110251990A CN112960582A CN 112960582 A CN112960582 A CN 112960582A CN 202110251990 A CN202110251990 A CN 202110251990A CN 112960582 A CN112960582 A CN 112960582A
- Authority
- CN
- China
- Prior art keywords
- fixedly connected
- pawl
- hoisting
- electromechanical device
- ratchet
- 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.)
- Pending
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
- B66D5/32—Detent devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D57/00—Liquid-resistance brakes; Brakes using the internal friction of fluids or fluid-like media, e.g. powders
- F16D57/02—Liquid-resistance brakes; Brakes using the internal friction of fluids or fluid-like media, e.g. powders with blades or like members braked by the fluid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D59/00—Self-acting brakes, e.g. coming into operation at a predetermined speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D63/00—Brakes not otherwise provided for; Brakes combining more than one of the types of groups F16D49/00 - F16D61/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D63/00—Brakes not otherwise provided for; Brakes combining more than one of the types of groups F16D49/00 - F16D61/00
- F16D63/002—Brakes with direct electrical or electro-magnetic actuation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D63/00—Brakes not otherwise provided for; Brakes combining more than one of the types of groups F16D49/00 - F16D61/00
- F16D63/006—Positive locking brakes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2121/00—Type of actuator operation force
- F16D2121/18—Electric or magnetic
- F16D2121/20—Electric or magnetic using electromagnets
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
Abstract
The invention relates to the technical field of electromechanical equipment, and discloses an environment-friendly electromechanical equipment hoisting device capable of preventing excessive falling by utilizing a ratchet wheel and a pawl. In an initial state, the weightless ball in the weightless detection seat is fixed at the middle position of the weightless detection seat by the positioning spring, and when the falling speed of a hoisting plate on the hoisting frame is high, the supporting force of the positioning spring in the weightless detection seat on the weightless ball is smaller than the gravity borne by the weightless ball, so that the weightless ball moves upwards, the weightless ball is in contact with two conductive balls on the supporting frame, the conductive balls are in a power-on state, the device can monitor the falling speed of the hoisting frame, and the intelligence of the device is improved.
Description
Technical Field
The invention relates to the technical field of electromechanical equipment, in particular to an environment-friendly electromechanical equipment hoisting device capable of preventing too fast falling by utilizing a ratchet wheel and a pawl.
Background
The electromechanical equipment generally refers to machinery, electrical equipment and electrical automation equipment, and in a building, the electromechanical equipment is generally called machinery and pipeline equipment except for earthwork, carpentry, reinforcing steel bars and muddy water. The hoisting device is different from hardware, can realize a finished product with certain functions, is an important component in electromechanical equipment, and is generally utilized for transporting some waste materials in the field of environmental protection.
Among the prior art, electromechanical device hoist device is carrying out the during operation, to some heavier objects, if the cooperation between cable and the pulley is pine, then can lead to hoist and mount frame falling speed too fast, when falling speed is very fast down, the power that hoist and mount frame received also promotes thereupon, makes hoist and mount frame easily drop, leads to the increase of potential safety hazard.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides the environment-friendly electromechanical equipment hoisting device for preventing the too fast falling by utilizing the ratchet wheel and the pawl, which has the advantages of automatically monitoring the falling speed and automatically reducing the too fast falling speed, and solves the problems that when the electromechanical equipment hoisting device works, for some heavy objects, if the matching between a cable and a pulley is loose, the falling speed of a hoisting frame is too fast, and when the falling speed is fast, the force borne by the hoisting frame is also lifted, so that the hoisting frame is easy to fall off, and the potential safety hazard is increased.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme: an environment-friendly electromechanical device hoisting device capable of preventing excessive falling by utilizing ratchet pawls comprises a winch, wherein a cable is wound on the outer side wall of the winch, one end of the cable is fixedly connected with a hoisting frame, the bottom of the hoisting frame is fixedly connected with a hoisting plate, a weightlessness detection seat is fixedly connected inside the hoisting plate, a support frame is fixedly connected inside the weightlessness detection seat, a positioning spring is fixedly connected to the inner side wall of the support frame, a weightlessness ball is fixedly connected to the top end of the positioning spring, spring rods are fixedly connected to both ends of the top of the support frame, and a conductive ball is fixedly connected to one end of each spring rod;
the outer side wall of the cable is connected with a pulley in a sliding mode, the inner side of the pulley is fixedly connected with a center shaft, the outer side wall of the center shaft is fixedly connected with a ratchet wheel, the inner side of the pulley is fixedly connected with an electromagnet, a pawl is meshed with the outer side wall of the ratchet wheel, one end of the pawl is fixedly connected with a connecting rod, one end of the connecting rod is fixedly connected with a permanent magnet, a rotating shaft of the pawl is fixedly connected with a rotating seat, the inner side of the rotating seat is rotatably connected with a pawl shaft, the outer side wall of the pawl shaft is fixedly connected with a damping plate.
Preferably, the weightless ball is suspended in the support frame through the positioning spring, the weightless ball is located at the middle position in the support frame, and the weightless ball moves upwards in a weightless state.
Preferably, the number of the conductive balls is two, the two conductive balls are respectively electrically connected with the positive electrode and the negative electrode of an external power supply, and the conductive balls control the electromagnet to work.
Preferably, the electromagnet has the same magnetic pole as the permanent magnet in the energized state, and the electromagnet exerts a repulsive force on the permanent magnet in the energized state.
Preferably, the electromagnet and the permanent magnet are located on the same horizontal plane, the electromagnet is parallel to the permanent magnet, and the electromagnet and the permanent magnet are close to each other, so that the electromagnet can drive the permanent magnet to move conveniently.
Preferably, the number of the pawls is four, the four pawls are distributed in a central symmetry manner according to the circle center position of the ratchet wheel, and the four pawls synchronously limit the speed of the ratchet wheel.
Preferably, the non-Newtonian fluid is composed of water and starch in a two to one ratio.
(III) advantageous effects
Compared with the prior art, the invention provides the environment-friendly electromechanical equipment hoisting device for preventing the too fast falling by utilizing the ratchet wheel and the pawl, and the environment-friendly electromechanical equipment hoisting device has the following beneficial effects:
1. according to the environment-friendly electromechanical equipment hoisting device capable of preventing excessive falling by utilizing the ratchet wheel and the pawl, the weightlessness ball in the weightlessness detection seat is fixed at the middle position of the weightlessness detection seat by the positioning spring in the initial state, and when the falling speed of the hoisting plate on the hoisting frame is high, the supporting force of the positioning spring in the weightlessness detection seat on the weightlessness ball is smaller than the gravity borne by the weightlessness ball, so that the weightlessness ball moves upwards, the weightlessness ball is in contact with the two conductive balls on the supporting frame, the conductive balls are in a power-on state, the device can monitor the falling speed of the hoisting frame, and the intelligence of the device is improved.
2. The environment-friendly electromechanical equipment hoisting device capable of preventing the excessive falling by utilizing the ratchet wheel and the pawl is characterized in that the ratchet wheel and the pawl are arranged, when the conductive ball is in a power-on state, the conductive ball controls the electromagnet to work, the electromagnet applies repulsive force to the permanent magnet on the pawl, the permanent magnet drives the pawl to overturn through the connecting rod, the pawl is in contact with the ratchet wheel, the rotating speed of the ratchet wheel is reduced by the pawl, meanwhile, a damping plate and non-Newtonian fluid are further arranged on a rotating shaft of the pawl, when the pawl is stressed greatly, the force applied by the damping plate to the non-Newtonian fluid is increased, the damping plate on the pawl is not easy to rotate in the non-Newtonian fluid, the limiting effect of the pawl on the ratchet wheel is further improved, when the device falls fast, the falling speed can be automatically reduced.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural diagram of the weightlessness detection seat of the present invention, wherein the supporting force of the positioning spring to the weightlessness ball is greater than the gravity borne by the weightlessness ball;
FIG. 3 is a schematic structural diagram of the weightlessness detection seat of the present invention, wherein the supporting force of the positioning spring to the weightlessness ball is smaller than the gravity borne by the weightlessness ball;
FIG. 4 is a cross-sectional view of a sheave of the present invention;
FIG. 5 is a view showing the connection between the pawl and the rotary base according to the present invention.
In the figure: 1. a winch; 11. a cable; 12. a hoisting frame; 13. hoisting the plate; 2. a weightlessness detection seat; 21. a support frame; 22. a positioning spring; 23. a weightless ball; 24. a spring lever; 25. a conductive ball; 3. a pulley; 31. a central shaft; 32. a ratchet wheel; 33. an electromagnet; 34. a pawl; 35. a connecting rod; 36. a permanent magnet; 4. a rotating seat; 41. a pawl shaft; 42. a damping plate; 43. a non-Newtonian fluid.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-5, an environment-friendly electromechanical device hoisting device for preventing too fast falling by using a ratchet and a pawl comprises a hoisting machine 1, a cable 11 is wound on the outer side wall of the hoisting machine 1, one end of the cable 11 is fixedly connected with a hoisting frame 12, the bottom of the hoisting frame 12 is fixedly connected with a hoisting plate 13, the inner part of the hoisting plate 13 is fixedly connected with a weightlessness detection seat 2, the inner part of the weightlessness detection seat 2 is fixedly connected with a support frame 21, the inner side wall of the support frame 21 is fixedly connected with a positioning spring 22, the top end of the positioning spring 22 is fixedly connected with a weightlessness ball 23, the weightlessness ball 23 is suspended in the support frame 21 through the positioning spring 22, the weightlessness ball 23 is located at the middle position in the support frame 21, the weightlessness ball 23 moves upwards in a weightlessness state, both ends of the top of the support frame 21 are fixedly connected with spring rods 24, one, the number of the conductive balls 25 is two, the two conductive balls 25 are respectively electrically connected with the positive electrode and the negative electrode of an external power supply, and the conductive balls 25 control the electromagnet 33 to work;
the outer side wall of the cable 11 is connected with a pulley 3 in a sliding manner, the interior of the pulley 3 is fixedly connected with a central shaft 31, the outer side wall of the central shaft 31 is fixedly connected with a ratchet 32, the interior of the pulley 3 is fixedly connected with an electromagnet 33, the outer side wall of the ratchet 32 is engaged with four pawls 34, the four pawls 34 are distributed in a central symmetry manner according to the position of the circle center of the ratchet 32, the four pawls 34 synchronously limit the speed of the ratchet 32, one end of each pawl 34 is fixedly connected with a connecting rod 35, one end of the connecting rod 35 is fixedly connected with a permanent magnet 36, the electromagnet 33 and the permanent magnet 36 are positioned on the same horizontal plane, the electromagnet 33 and the permanent magnet 36 are parallel to each other, the electromagnet 33 and the permanent magnet 36 are close to each other, the electromagnet 33 drives the permanent magnet 36 to move conveniently, the, the rotating shaft of the pawl 34 is fixedly connected with a rotating seat 4, the inside of the rotating seat 4 is rotatably connected with a pawl shaft 41, the outer side wall of the pawl shaft 41 is fixedly connected with a damping plate 42, the inside of the rotating seat 4 is filled with a non-Newtonian fluid 43, and the non-Newtonian fluid 43 is composed of water and starch according to a two-to-one ratio.
The working principle is as follows: in an initial state, the weightlessness ball 23 in the weightlessness detection seat 2 is fixed at the middle position of the weightlessness detection seat 2 by the positioning spring 22, when the falling speed of the hoisting plate 13 on the hoisting frame 12 is high, the supporting force of the positioning spring 22 in the weightlessness detection seat 2 on the weightlessness ball 23 is smaller than the gravity borne by the weightlessness ball 23, so that the weightlessness ball 23 moves upwards, the weightlessness ball 23 is in contact with the two conductive balls 25 on the supporting frame 21, the conductive balls 25 are in a power-on state, the device can monitor the falling speed of the hoisting frame 12, and the intelligence of the device is improved.
Please refer to fig. 1 to 3 for the above structure and process.
Meanwhile, when the conductive ball 25 is in a power-on state, the conductive ball 25 controls the electromagnet 33 to work, so that the electromagnet 33 applies a repulsive force to the permanent magnet 36 on the pawl 34, the permanent magnet 36 drives the pawl 34 to overturn through the connecting rod 35, the pawl 34 is in contact with the ratchet wheel 32, the rotating speed of the ratchet wheel 32 is reduced by the pawl 34, meanwhile, a damping plate 42 and a non-Newtonian fluid 43 are further arranged on a rotating shaft of the pawl 34, when the pawl 34 is stressed greatly, the force applied by the damping plate 42 to the non-Newtonian fluid 43 is increased, the damping plate 42 on the pawl shaft 41 is not easy to rotate in the non-Newtonian fluid 43, the limiting effect of the pawl 34 on the ratchet wheel 32 is further improved, when the device falls fast, the falling speed can be automatically reduced, and the outgoing line of potential safety.
Please refer to fig. 4 and 5 for the above structure and process.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides an utilize ratchet pawl to prevent falling too fast environmental protection electromechanical device hoist device, includes hoist engine (1), its characterized in that: a cable (11) is wound on the outer side wall of the winch (1), one end of the cable (11) is fixedly connected with a hoisting frame (12), the bottom of the hoisting frame (12) is fixedly connected with a hoisting plate (13), the interior of the hoisting plate (13) is fixedly connected with a weightlessness detection seat (2), the interior of the weightlessness detection seat (2) is fixedly connected with a support frame (21), the inner side wall of the support frame (21) is fixedly connected with a positioning spring (22), the top end of the positioning spring (22) is fixedly connected with a weightlessness ball (23), two ends of the top of the support frame (21) are fixedly connected with spring rods (24), and one end of each spring rod (24) is fixedly connected with a conductive ball (25);
the utility model discloses a cable, including cable (11), the lateral wall sliding connection of cable (11) has pulley (3), the inside fixedly connected with center pin (31) of pulley (3), lateral wall fixedly connected with ratchet (32) of center pin (31), the inside fixedly connected with electromagnet (33) of pulley (3), the lateral wall meshing of ratchet (32) has pawl (34), the one end fixedly connected with connecting rod (35) of pawl (34), the one end fixedly connected with permanent magnet (36) of connecting rod (35), the rotation axis fixedly connected with of pawl (34) rotates seat (4), the inside rotation that rotates seat (4) is connected with pawl axle (41), the lateral wall fixedly connected with damping plate (42) of pawl axle (41), the inside packing that rotates seat (4) has non-Newton's fluid (43).
2. The hoisting device for the environment-friendly electromechanical device for preventing the electromechanical device from falling too fast by using the ratchet and the pawl as claimed in claim 1, wherein: the weightless ball (23) is suspended in the support frame (21) through the positioning spring (22), and the weightless ball (23) is located in the middle position in the support frame (21).
3. The hoisting device for the environment-friendly electromechanical device for preventing the electromechanical device from falling too fast by using the ratchet and the pawl as claimed in claim 1, wherein: the number of the conductive balls (25) is two, and the two conductive balls (25) are respectively electrically connected with the positive electrode and the negative electrode of an external power supply.
4. The hoisting device for the environment-friendly electromechanical device for preventing the electromechanical device from falling too fast by using the ratchet and the pawl as claimed in claim 1, wherein: the electromagnet (33) has the same magnetic pole as the permanent magnet (36) in the energized state.
5. The hoisting device for the environment-friendly electromechanical device for preventing the electromechanical device from falling too fast by using the ratchet and the pawl as claimed in claim 1, wherein: the electromagnet (33) and the permanent magnet (36) are located on the same horizontal plane, and the electromagnet (33) and the permanent magnet (36) are parallel to each other.
6. The hoisting device for the environment-friendly electromechanical device for preventing the electromechanical device from falling too fast by using the ratchet and the pawl as claimed in claim 1, wherein: the number of the pawls (34) is four, and the four pawls (34) are distributed in a central symmetry mode according to the circle center position of the ratchet wheel (32).
7. The hoisting device for the environment-friendly electromechanical device for preventing the electromechanical device from falling too fast by using the ratchet and the pawl as claimed in claim 1, wherein: the non-Newtonian fluid (43) is composed of water and starch in a two to one ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110251990.6A CN112960582A (en) | 2021-03-08 | 2021-03-08 | Utilize ratchet pawl to prevent too fast environmental protection electromechanical device hoist device of whereabouts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110251990.6A CN112960582A (en) | 2021-03-08 | 2021-03-08 | Utilize ratchet pawl to prevent too fast environmental protection electromechanical device hoist device of whereabouts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112960582A true CN112960582A (en) | 2021-06-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110251990.6A Pending CN112960582A (en) | 2021-03-08 | 2021-03-08 | Utilize ratchet pawl to prevent too fast environmental protection electromechanical device hoist device of whereabouts |
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| Country | Link |
|---|---|
| CN (1) | CN112960582A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112459451A (en) * | 2020-11-13 | 2021-03-09 | 盛涛 | Dual-purpose hanging flower basket device that weighs down soon of preventing of construction |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202193507U (en) * | 2011-05-24 | 2012-04-18 | 江苏通州四建集团有限公司 | Anti-falling safety device for building construction elevator |
| CN202689644U (en) * | 2012-07-11 | 2013-01-23 | 江南嘉捷电梯股份有限公司 | Safety protection device for three-dimensional parking garage |
| CN104023785A (en) * | 2011-11-22 | 2014-09-03 | 贝克顿·迪金森公司 | Drug delivery system with delay mechanism |
| CN206293057U (en) * | 2016-11-19 | 2017-06-30 | 成小龙 | A kind of super weightless demonstration device |
| CN107826077A (en) * | 2017-12-11 | 2018-03-23 | 山东交通学院 | A kind of tight receiving apparatus of safety belt |
| CN211034799U (en) * | 2019-10-28 | 2020-07-17 | 河北铭从科技服务有限公司 | ARD elevator power failure emergency device |
| CN112249835A (en) * | 2020-09-29 | 2021-01-22 | 朱武杰 | Elevator stall self-locking mechanism utilizing electromagnetic pole-changing principle |
| CN212509286U (en) * | 2020-06-18 | 2021-02-09 | 福建华电可门发电有限公司 | Automatically controlled anti-falling device of wall climbing robot |
-
2021
- 2021-03-08 CN CN202110251990.6A patent/CN112960582A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202193507U (en) * | 2011-05-24 | 2012-04-18 | 江苏通州四建集团有限公司 | Anti-falling safety device for building construction elevator |
| CN104023785A (en) * | 2011-11-22 | 2014-09-03 | 贝克顿·迪金森公司 | Drug delivery system with delay mechanism |
| CN202689644U (en) * | 2012-07-11 | 2013-01-23 | 江南嘉捷电梯股份有限公司 | Safety protection device for three-dimensional parking garage |
| CN206293057U (en) * | 2016-11-19 | 2017-06-30 | 成小龙 | A kind of super weightless demonstration device |
| CN107826077A (en) * | 2017-12-11 | 2018-03-23 | 山东交通学院 | A kind of tight receiving apparatus of safety belt |
| CN211034799U (en) * | 2019-10-28 | 2020-07-17 | 河北铭从科技服务有限公司 | ARD elevator power failure emergency device |
| CN212509286U (en) * | 2020-06-18 | 2021-02-09 | 福建华电可门发电有限公司 | Automatically controlled anti-falling device of wall climbing robot |
| CN112249835A (en) * | 2020-09-29 | 2021-01-22 | 朱武杰 | Elevator stall self-locking mechanism utilizing electromagnetic pole-changing principle |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112459451A (en) * | 2020-11-13 | 2021-03-09 | 盛涛 | Dual-purpose hanging flower basket device that weighs down soon of preventing of construction |
| CN112459451B (en) * | 2020-11-13 | 2022-02-18 | 北京市政建设集团有限责任公司 | Dual-purpose hanging flower basket device that weighs down soon of preventing of construction |
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Application publication date: 20210615 |