CN112249835A - Elevator stall self-locking mechanism utilizing electromagnetic pole-changing principle - Google Patents
Elevator stall self-locking mechanism utilizing electromagnetic pole-changing principle Download PDFInfo
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- CN112249835A CN112249835A CN202011051579.6A CN202011051579A CN112249835A CN 112249835 A CN112249835 A CN 112249835A CN 202011051579 A CN202011051579 A CN 202011051579A CN 112249835 A CN112249835 A CN 112249835A
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- pole
- elevator
- changing
- locking mechanism
- electromagnetic coil
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
- B66B5/04—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions for detecting excessive speed
- B66B5/06—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions for detecting excessive speed electrical
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
- B66B5/16—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well
- B66B5/26—Positively-acting devices, e.g. latches, knives
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
Abstract
The invention relates to the technical field of elevator safety protection devices, and discloses an elevator stall self-locking mechanism utilizing an electromagnetic pole-changing principle. Compared with the existing structure, the elevator stall self-locking mechanism utilizing the electromagnetic pole-changing principle has higher reliability; the elevator mechanism does not influence the normal use of elevator when normal work, when the elevator appears the stall whereabouts, in time with the rope sheave auto-lock, prevents it to continue the whereabouts, has avoided the loss of property and personnel that probably exist, very big assurance passenger's safety, has improved the security of elevator greatly.
Description
Technical Field
The invention relates to the technical field of elevator safety protection devices, in particular to an elevator stalling self-locking mechanism utilizing an electromagnetic pole-changing principle.
Background
Along with rapid development of economy and continuous deepening of urbanization, high-rise buildings are more and more, and the high-rise buildings are essential to be elevators, so the elevators are widely popularized and used for riding people or carrying goods. Because the elevator is pulled by the steel rope to move up and down under the driving of the elevator when in work, once an accident occurs in the working process, the elevator can have the danger of falling, so that personnel or goods are in danger, and the safety protection device of the elevator is particularly important.
Elevator protection device mainly has speed limiter and safety tongs, when the elevator falls fast, make the motor slow down until stopping through speed limiter and safety tongs, and current overspeed governor is mostly thrown away under the effect of centrifugal force through getting rid of the piece, drive mechanism locking overspeed governor, this kind of mechanical structure is unreliable, and in case the unable normal work of overspeed governor takes place when falling at the elevator, elevator car will produce huge impulse, produce great hidden danger to personnel's safety, therefore we propose an elevator stall self-locking mechanism who utilizes the electromagnetism pole-changing principle.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides an elevator stall self-locking mechanism utilizing an electromagnetic pole-changing principle, which has the advantages of reliable mechanical structure and higher safety and solves the problems of unreliable mechanical structure and higher potential safety hazard.
(II) technical scheme
In order to realize the purpose of reliable and safer mechanical structure, the invention provides the following technical scheme: an elevator stall self-locking mechanism utilizing an electromagnetic pole-changing principle comprises a base, wherein a fixed frame is fixedly mounted at the upper end of the base, a rope wheel is rotatably connected inside the fixed frame, a positioning rod is fixedly mounted on the front surface of the rope wheel, a pawl is rotatably connected on the front surface of the positioning rod, a pole-changing mechanism is movably connected on the front surface of the pawl, a ratchet wheel is fixedly mounted inside the fixed frame, a reset spring is fixedly mounted at one end, away from the pawl, of the pole-changing mechanism, an electromagnetic coil is fixedly mounted at one end, away from the pole-changing mechanism, of the electromagnetic coil, a rotating speed sensor is fixedly mounted at one end, away from the reset spring, of the;
the pole changing mechanism comprises a shell, a limiting spring is fixedly mounted at the bottom end inside the shell, an electrorheological body is arranged inside the shell, a push rod is fixedly mounted at one end, away from the bottom of the shell, of the limiting spring, a current contact is fixedly mounted at the bottom end of the shell, a pin shaft is rotatably connected to the front surface of the shell, a rotating rod is fixedly mounted at the outer side of the pin shaft, and a current contact is fixedly mounted at one side, close to the current contact, of the rotating rod.
Preferably, the axes of the fixing frame, the rope wheel, the ratchet wheel and the positioning disc are on the same straight line, wherein the rope wheel is rotatably connected with the fixing frame, the ratchet wheel is fixedly connected with the fixing frame, the positioning disc is fixedly connected with the rope wheel, and the positioning disc is positioned on the front surface of the rope wheel.
Preferably, the positioning rod, the pawl and the pole changing mechanism are all provided with four parts and have the same specification, the parts are uniformly distributed by taking the circle center of the rope wheel as a reference, the pawl is rotatably connected with the middle position of the positioning rod, and the pole changing mechanism is movably connected with one side of the pawl.
Preferably, the reset springs are provided with four springs with the same size, one end of each spring is fixedly connected with the pole changing mechanism, and the other end of each spring is fixedly connected with the electromagnetic coil.
Preferably, the electromagnetic coils and the rotating speed sensor are all provided with four coils and have the same specification, wherein one end of each electromagnetic coil is fixedly connected with a return spring, the other end of each electromagnetic coil is fixedly connected with the rotating speed sensor, the electromagnetic coils are electrically connected with the rotating speed sensor, the electromagnetic coils are electrified, and one ends of the electromagnetic coils, close to the return springs, display N poles.
Preferably, the electrorheological fluid is in a solid state in a non-energized state and in a liquid state in an energized state.
Preferably, the rotating rod is a magnetic pole salient pole made of a magnetic material, the current contact is electrically connected with the rotating speed sensor, and the current contact is connected with the current variant.
(III) advantageous effects
Compared with the prior art, the invention provides an elevator stalling self-locking mechanism utilizing an electromagnetic pole-changing principle, which has the following beneficial effects:
1. this utilize elevator stall self-locking mechanism of electromagnetism pole change principle, through the detection of speed sensor to rope sheave rotational speed, when elevator falling speed reached a definite value, triggered pole change mechanism carries out the auto-lock to the rope sheave, compares with current structure, and the reliability is higher.
2. This utilize elevator stall self-locking mechanism of electromagnetism pole-changing principle, the elevator does not influence the normal use of elevator at normal during operation mechanism, when the stall whereabouts appears in the elevator, in time with the rope sheave auto-lock, prevents its continuation whereabouts, has avoided the loss of the property and the personnel that probably exist, very big assurance passenger's safety, has improved the security of elevator greatly.
Drawings
FIG. 1 is a front view of the structural attachment of the present invention;
FIG. 2 is a schematic diagram of the movement traces of the structures of FIG. 2 according to the present invention;
FIG. 3 is a front view of the present invention with the ratchet wheel removed;
FIG. 4 is a schematic diagram of the movement traces of the structures shown in FIG. 3 according to the present invention;
FIG. 5 is a schematic view of the connection structure of the pole-changing mechanism of the present invention;
FIG. 6 is an enlarged view of the structure of FIG. 3A according to the present invention.
In the figure: 1. a base; 2. a fixed mount; 3. a sheave; 4. positioning a rod; 5. a pawl; 6. a pole changing mechanism; 7. a ratchet wheel; 8. a return spring; 9. an electromagnetic coil; 10. a rotational speed sensor; 11. positioning a plate; 61. a housing; 62. a limiting spring; 63. an electrorheological fluid; 64. a push rod; 65. a current contact; 66. a pin shaft; 67. a rotating rod; 68. and a current contact.
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. 1-6, an elevator stall self-locking mechanism using electromagnetic pole-changing principle comprises a base 1, a fixing frame 2 is fixedly installed at the upper end of the base 1, a rope pulley 3 is rotatably connected inside the fixing frame 2, the axes of the fixing frame 2, the rope pulley 3, a ratchet 7 and a positioning disc 11 are on the same straight line, wherein the rope pulley 3 is rotatably connected with the fixing frame 2, the ratchet 7 is fixedly connected with the fixing frame 2, the positioning disc 11 is fixedly connected with the rope pulley 3, the positioning disc 11 is positioned on the front side of the rope pulley 3, a positioning rod 4 is fixedly installed on the front side of the rope pulley 3, a pawl 5 is rotatably connected on the front side of the positioning rod 4, the front side of the pawl 5 is movably connected with a pole-changing mechanism 6, the positioning rod 4, the pawl 5 and the pole-changing mechanism 6 are all provided with four parts and have the same specification, the pole changing mechanism 6 is movably connected with one side of a pawl 5, a ratchet wheel 7 is fixedly arranged in the fixing frame 2, the pawl 5 is driven to rotate by the upward movement of the pole changing mechanism 6, the pawl 5 is contacted with the ratchet wheel 7, so that the rope wheel 3 is prevented from continuously rotating, a return spring 8 is fixedly arranged at one end of the pole changing mechanism 6, which is far away from the pawl 5, four return springs 8 are arranged, the sizes and the sizes of the return springs are the same, one end of each return spring is fixedly connected with the pole changing mechanism 6, the other end of each return spring is fixedly connected with an electromagnetic coil 9, one end of each electromagnetic coil 9, which is far away from the pole changing mechanism 6, is fixedly provided with an electromagnetic coil 9, one end of each electromagnetic coil 9, which is far away from the return spring 8, is fixedly provided with a rotating speed sensor, the electromagnetic coil 9 is electrically connected with the rotating speed sensor 10, the electromagnetic coil 9 is electrified, the N pole is displayed at one end close to the return spring 8, the rotating speed sensor 10 can generate currents with different intensities according to the rotating speed of the rope pulley 3, the magnetism of the electromagnetic coil 9 is different, the rotating speed of the rope pulley 3 is detected through the rotating speed sensor 10, when the falling speed of the elevator reaches a certain value, the pole changing mechanism 6 is triggered, the rope pulley 3 is self-locked, and compared with the existing structure, the reliability is higher; a positioning disc 11 is fixedly arranged inside the rope wheel 3;
the pole changing mechanism 6 comprises a shell 61, a limit spring 62 is fixedly arranged at the bottom end inside the shell 61, an electrorheological body 63 is arranged inside the shell 61, the electrorheological body 63 is in a solid state in a non-electrified state and in a liquid state in an electrified state, the limit spring 62 pushes a push rod 64 to move outwards under the action of elastic force due to the electrorheological body 63 being in the liquid state, a push rod 64 is fixedly arranged at one end of the limit spring 62 far away from the bottom of the shell 61, a current contact 65 is fixedly arranged at the bottom end of the shell 61, a pin shaft 66 is rotatably connected to the front surface of the shell 61, a rotating rod 67 is fixedly arranged on the outer side of the pin shaft 66, a current contact 68 is fixedly arranged on one side of the rotating rod 67 close to the current contact 65, the rotating rod 67 is a magnetic pole display N pole made of a magnetic material, the current contact 68 is electrically connected with a rotating speed sensor 10, the current contact 65 is connected, the rotating lever 67 is rotated upward to bring the current contact 68 and the current contact 65 into contact with each other, thereby energizing the current transformer 63.
The operating principle is that when the elevator is in normal use, the repulsive force generated between the electromagnetic coil 9 and the rotating rod 67 is smaller than the elastic force of the reset spring 8, the current contact 65 is not contacted with the current contact 68, the current variant 63 is in a solid state at the moment, and the limiting spring 62 is in a compressed state;
when the elevator is out of order and stalled and falls, the rotating speed of the rope pulley 3 is accelerated, the current generated by the rotating speed sensor 10 is increased, the current passing through the electromagnetic coil 9 is increased due to the fact that the rotating speed sensor 10 is electrically connected with the electromagnetic coil 9, the magnetic property of the generated N pole is increased, the rotating rod 67 is made of magnetic materials and displays the N pole, namely the repulsive force between the electromagnetic coil 9 and the rotating rod 67 is increased and is larger than the elastic force provided by the reset spring 8, the rotating rod 67 rotates upwards, when the rotating rod 67 rotates until the current contact 68 is contacted with the current contact 65, the current contact 68 is electrically connected with the rotating speed sensor 10, the current variant 63 is electrified, the current variant 63 is changed from a solid state to a liquid state, the limit spring 62 moves upwards, the push rod 64 is fixedly connected with the upper end of the limit spring 62, the push rod 64 is movably connected with the pawl 5, the middle position, thereby driving the pawl 5 to rotate by taking the middle position as the center of a circle, so that the other side of the pawl 5 rotates downwards, the pawl 5 is contacted with the ratchet wheel 7, the rope wheel 3 cannot rotate continuously, and the elevator stops falling synchronously, thereby preventing the elevator from stalling and falling.
In summary, in the elevator stalling self-locking mechanism based on the electromagnetic pole changing principle, the rotation speed of the rope wheel 3 is detected by the rotation speed sensor 10, when the falling speed of the elevator reaches a certain value, the pole changing mechanism 6 is triggered to self-lock the rope wheel 3, and compared with the conventional structure, the reliability is higher.
This utilize elevator stall self-locking mechanism of electromagnetism pole-changing principle, the elevator does not influence the normal use of elevator at normal during operation mechanism, when the stall whereabouts appears in the elevator, in time with rope sheave 3 auto-lock, prevents it to continue the whereabouts, has avoided the loss of the property and the personnel that probably exist, very big assurance passenger's safety, has improved the security of elevator greatly.
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 elevator stall self-locking mechanism of electromagnetism pole-changing principle, includes base (1), its characterized in that: a fixed frame (2) is fixedly arranged at the upper end of the base (1), a rope wheel (3) is rotatably connected inside the fixed frame (2), a positioning rod (4) is fixedly arranged on the front surface of the rope wheel (3), a pawl (5) is rotatably connected on the front surface of the positioning rod (4), the front surface of the pawl (5) is movably connected with a pole-changing mechanism (6), a ratchet wheel (7) is fixedly arranged inside the fixed frame (2), one end of the pole-changing mechanism (6) far away from the pawl (5) is fixedly provided with a return spring (8), an electromagnetic coil (9) is fixedly arranged at one end of the return spring (8) far away from the pole-changing mechanism (6), a rotating speed sensor (10) is fixedly mounted at one end, far away from the return spring (8), of the electromagnetic coil (9), and a positioning disc (11) is fixedly mounted inside the rope wheel (3);
pole change mechanism (6) are including casing (61), the inside bottom fixed mounting of casing (61) has spacing spring (62), the inside of casing (61) is provided with current variant (63), the one end fixed mounting that casing (61) bottom was kept away from in spacing spring (62) has push rod (64), the bottom fixed mounting of casing (61) has current contact (65), the front of casing (61) is rotated and is connected with round pin axle (66), the outside fixed mounting of round pin axle (66) has bull stick (67), one side fixed mounting that bull stick (67) is close to current contact (65) has current contact (68).
2. The elevator stall self-locking mechanism using the electromagnetic pole-changing principle according to claim 1, characterized in that: the axis of mount (2), rope sheave (3), ratchet (7) and positioning disk (11) is on same straight line, and wherein rope sheave (3) rotates with mount (2) to be connected, and ratchet (7) and mount (2) fixed connection, positioning disk (11) and rope sheave (3) fixed connection, and positioning disk (11) are located the front of rope sheave (3).
3. The elevator stall self-locking mechanism using the electromagnetic pole-changing principle according to claim 1, characterized in that: the positioning rod (4), the pawl (5) and the pole changing mechanism (6) are all provided with four parts and have the same specification, the circle centers of the rope wheels (3) are uniformly distributed according to the reference, the pawl (5) is rotatably connected with the middle position of the positioning rod (4), and the pole changing mechanism (6) is movably connected with one side of the pawl (5).
4. The elevator stall self-locking mechanism using the electromagnetic pole-changing principle according to claim 1, characterized in that: the reset springs (8) are provided with four springs with the same size, one end of each spring is fixedly connected with the pole changing mechanism (6), and the other end of each spring is fixedly connected with the electromagnetic coil (9).
5. The elevator stall self-locking mechanism using the electromagnetic pole-changing principle according to claim 1, characterized in that: the electromagnetic coil (9) and the rotation speed sensor (10) are all provided with four coils and have the same specification, wherein one end of the electromagnetic coil (9) is fixedly connected with the reset spring (8), the other end of the electromagnetic coil is fixedly connected with the rotation speed sensor (10), the electromagnetic coil (9) is electrically connected with the rotation speed sensor (10), the electromagnetic coil (9) is electrified, and one end, close to the reset spring (8), of the electromagnetic coil displays an N pole.
6. The elevator stall self-locking mechanism using the electromagnetic pole-changing principle according to claim 1, characterized in that: the electrorheological fluid (63) is in a solid state in a non-energized state and in a liquid state in an energized state.
7. The elevator stall self-locking mechanism using the electromagnetic pole-changing principle according to claim 1, characterized in that: the rotating rod (67) is made of magnetic materials, magnetic poles of the rotating rod display N poles, the current contact (68) is electrically connected with the rotating speed sensor (10), and the current contact (65) is connected with the current variant (63).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011051579.6A CN112249835A (en) | 2020-09-29 | 2020-09-29 | Elevator stall self-locking mechanism utilizing electromagnetic pole-changing principle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011051579.6A CN112249835A (en) | 2020-09-29 | 2020-09-29 | Elevator stall self-locking mechanism utilizing electromagnetic pole-changing principle |
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| Publication Number | Publication Date |
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| CN112249835A true CN112249835A (en) | 2021-01-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011051579.6A Pending CN112249835A (en) | 2020-09-29 | 2020-09-29 | Elevator stall self-locking mechanism utilizing electromagnetic pole-changing principle |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112827091A (en) * | 2021-01-25 | 2021-05-25 | 列耀乐 | Automatic control emergency stop rope pulley for forest rescue |
| CN112960582A (en) * | 2021-03-08 | 2021-06-15 | 安徽省迎祥建筑劳务有限公司 | Utilize ratchet pawl to prevent too fast environmental protection electromechanical device hoist device of whereabouts |
| CN113140859A (en) * | 2021-04-17 | 2021-07-20 | 深圳市驰普科达科技有限公司 | Battery pack management device capable of reducing power loss in standby |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1041848A (en) * | 1988-10-07 | 1990-05-02 | 陈启星 | Double-coil electromagnetic switch |
| CN1051267A (en) * | 1990-09-25 | 1991-05-08 | 许中 | Dc-controlled reversible switch |
| CN111532934A (en) * | 2020-05-15 | 2020-08-14 | 梧州无量科技有限公司 | Elevator stall self-locking structure for building intelligent engineering field |
| CN111555543A (en) * | 2020-05-26 | 2020-08-18 | 孙立 | Brake component capable of stalling and self-locking by using current variant principle |
| CN111550509A (en) * | 2020-05-19 | 2020-08-18 | 赵群燕 | Stall self-locking mechanism for transmission shaft of household wind driven generator in new energy field |
| CN111549700A (en) * | 2020-05-20 | 2020-08-18 | 广西叮当智慧停车服务有限公司 | Horizontal rod anti-falling structure for entrance and exit gate of parking lot management system |
-
2020
- 2020-09-29 CN CN202011051579.6A patent/CN112249835A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1041848A (en) * | 1988-10-07 | 1990-05-02 | 陈启星 | Double-coil electromagnetic switch |
| CN1051267A (en) * | 1990-09-25 | 1991-05-08 | 许中 | Dc-controlled reversible switch |
| CN111532934A (en) * | 2020-05-15 | 2020-08-14 | 梧州无量科技有限公司 | Elevator stall self-locking structure for building intelligent engineering field |
| CN111550509A (en) * | 2020-05-19 | 2020-08-18 | 赵群燕 | Stall self-locking mechanism for transmission shaft of household wind driven generator in new energy field |
| CN111549700A (en) * | 2020-05-20 | 2020-08-18 | 广西叮当智慧停车服务有限公司 | Horizontal rod anti-falling structure for entrance and exit gate of parking lot management system |
| CN111555543A (en) * | 2020-05-26 | 2020-08-18 | 孙立 | Brake component capable of stalling and self-locking by using current variant principle |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112827091A (en) * | 2021-01-25 | 2021-05-25 | 列耀乐 | Automatic control emergency stop rope pulley for forest rescue |
| CN112827091B (en) * | 2021-01-25 | 2022-07-22 | 列耀乐 | Automatic control emergency stop rope pulley for forest rescue |
| CN112960582A (en) * | 2021-03-08 | 2021-06-15 | 安徽省迎祥建筑劳务有限公司 | Utilize ratchet pawl to prevent too fast environmental protection electromechanical device hoist device of whereabouts |
| CN113140859A (en) * | 2021-04-17 | 2021-07-20 | 深圳市驰普科达科技有限公司 | Battery pack management device capable of reducing power loss in standby |
| CN113140859B (en) * | 2021-04-17 | 2022-08-23 | 深圳市驰普科达科技有限公司 | Battery pack management device capable of reducing power loss in standby |
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Application publication date: 20210122 |
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