CN112413019B

CN112413019B - Car elevator operation traction structure

Info

Publication number: CN112413019B
Application number: CN202011416811.1A
Authority: CN
Inventors: 刘涛
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-12-07
Filing date: 2020-12-07
Publication date: 2022-05-10
Anticipated expiration: 2040-12-07
Also published as: CN112413019A

Abstract

The invention relates to the technical field of public equipment and discloses a car elevator operation traction structure which comprises a brake base, wherein an electromagnet fixer is fixedly installed on the upper surface of the brake base, sliding rods are fixedly installed on two sides of the middle of the electromagnet fixer, bottom rods are fixedly connected to two sides of the bottom of the electromagnet fixer, rotating shafts are fixedly installed on two sides of the front face of the bottom end of the brake base, and a brake arm located on the front face of the brake base is movably sleeved outside the rotating shafts. This structure is hauled in car elevator operation, through when the band-type brake, the position of movable block is influenced constantly by brake shoe thickness for the contact position constantly change of gleitbretter and resistance lever, make the electro-magnet increase to annular magnet's suction, thereby make the stopper remain unchanged to the redundant clamp force of driving sheave, then under the different states of brake shoe wearing and tearing circumstances, the elevator hauls the overspeed protective capability of structure stable, improves the security of elevator operation.

Description

Car elevator operation traction structure

Technical Field

The invention relates to the technical field of public equipment, in particular to a car elevator operation traction structure.

Background

The gearless synchronous traction machine with the characteristics of low speed and large torque is increasingly applied to the elevator industry of China due to the advantages of energy conservation, small volume, stable low-speed operation, low noise and the like. Meanwhile, a brake of the permanent magnet synchronous traction machine is used as a functional part for stopping the elevator and a safety part for protecting the car from ascending overspeed, and the brake is required to output a safe and abundant braking torque. The working principle of the brake is that when the brake is released, the electromagnet and the traction sheave are electrified to generate larger electromagnetic attraction force, the brake is opened by overcoming the action of the compression spring, the elevator can run at the moment, when the brake is released, the electromagnet is powered off, the electromagnetic attraction force is not generated at the moment, and under the action of the compression spring, the brake arm moves towards the brake direction to lock the traction sheave.

Firstly, in the running process of the elevator, the brake arm continuously releases the brake so that the brake shoe is continuously contacted with the traction sheave, after a long time, the thickness of the side, contacted with the traction sheave, of the brake shoe is continuously thinned after long-time friction, the working path, clamped by the brake arm, of the traction sheave is continuously increased, the length of the spring, clamped by the compression spring, is continuously increased, when the elevator runs at an overspeed, the brake needs abundant clamping force to protect, the length of the spring, clamped by the compression spring, is increased, the clamping force of the compression spring on the brake arm is reduced, and then the redundant clamping force is reduced, so that the overspeed protection function is influenced.

Secondly, because the brake shoe of the brake is installed in the tractor, the brake shoe can not be monitored in real time, manual field inspection is needed for many times, detection is needed when the elevator is stopped during inspection, and safety detection can not be carried out on the brake shoe at any time and any place.

Disclosure of Invention

The invention provides a car elevator operation traction structure, which has the advantage of wear early warning and solves the problems in the background technology.

The invention provides the following technical scheme: a car elevator operation traction structure comprises a brake base, wherein electromagnet holders are fixedly mounted on the upper surface of the brake base, sliding rods are fixedly mounted on two sides of the middle of each electromagnet holder, bottom rods are fixedly connected to two sides of the bottom of each electromagnet holder, rotating shafts are fixedly mounted on two sides of the front of the bottom of the brake base, a brake arm located on the front of the brake base is movably sleeved on the outer portion of each rotating shaft, moving blocks are movably sleeved on the outer portions of the sliding rods and the bottom rods, the other end of each brake arm is fixedly connected with the lower ends of the moving blocks, a traction wheel is movably sleeved on the middle of the brake base, a brake shoe located in the middle of the brake base is fixedly mounted on one side, close to the traction wheel, of each brake arm, electromagnet accommodating cavities are formed in two sides of the inner portion of each electromagnet holder, and electromagnets are fixedly sleeved on two sides of each electromagnet holder, a coil positioned outside the electromagnet is fixedly installed inside the electromagnet accommodating cavity, one end of the outside of the sliding rod far away from the electromagnet fixer is fixedly sleeved with a limiting back plate, a spring fixing block is fixedly sleeved at one end of the outer part of the bottom rod, which is far away from the electromagnet fixer, an annular magnet is fixedly arranged inside the moving block and positioned at the outer side of the sliding rod, a compression spring positioned outside the bottom rod is fixedly arranged on one side of the spring fixing block close to the electromagnet fixer, the other end of the compression spring is fixedly installed with the moving block, one end of the bottom rod close to the electromagnet fixer is fixedly installed with a resistance rod positioned between the electromagnet and the moving block, a cavity is arranged outside the bottom rod of the moving block, a conductive rod is fixedly arranged above the cavity, the fixed cover in outside of conducting rod has connect the gleitbretter, the other end and the bottom bar contact of gleitbretter.

Preferably, two ends of the coil are electrically connected with the positive electrode and the negative electrode of the power supply, the coil and the resistance rod are electrically connected with the positive electrode and the negative electrode of the power supply, the resistance rod is electrically connected with the alarm switch, and the alarm switch is electrically connected with the alarm device.

Preferably, fixed rings are fixedly mounted on two sides of the slip sheet to fix the slip sheet, the outer edge of the resistance rod is flush with the outer surface height of the bottom rod, when the brake shoe is not abraded, the slip sheet is located at one end, close to the moving block, of the resistance rod, the slip sheet is in contact with an external insulating skin of the bottom rod at the moment, a coil is not connected with a circuit, and terminals are arranged at one ends, close to the electromagnet holder, of the conductive rod and the resistance rod.

Preferably, the positive and negative poles of the first power supply and the second power supply are opposite to each other, the first power supply, the second power supply and a circuit where the coil is located are connected in parallel, and the second power supply, the resistance rod alarm switch and the alarm device are connected in series.

Preferably, alarm switch is set up with electrically conductive magnetism piece relatively by the iron core, and electrically conductive magnetism piece is kept away from iron core one side fixed mounting and is had the spring, and the spring other end is fixed, and when resistance pole department resistance was close minimum, the magnetic force that the iron core produced will electrically conductive magnetism piece actuation for alarm device place circuit switch-on, thereby send out the police dispatch newspaper, remind brake shoe wearing and tearing serious this moment, need change.

The invention has the following beneficial effects:

1. this structure is hauled in car elevator operation, through when the band-type brake, the position of movable block is influenced constantly by brake shoe thickness for the contact position constantly change of gleitbretter and resistance lever, make the electro-magnet increase to annular magnet's suction, thereby make the stopper remain unchanged to the redundant clamp force of driving sheave, then under the different states of brake shoe wearing and tearing circumstances, the elevator hauls the overspeed protective capability of structure stable, improves the security of elevator operation.

2. This car elevator operation tows structure, through under brake shoe wearing and tearing serious condition, the gleitbretter is about to move resistance bar end, and iron core magnetic force reinforcing in the alarm switch this moment will lead the magnetic block actuation then for alarm device department electric current circulation, thereby send out the police dispatch newspaper, make no matter the degree of wear that can both brake shoe at any time monitor the early warning, improve elevator operation security.

Drawings

FIG. 1 is a schematic view of the brake of the present invention;

FIG. 2 is a schematic diagram of an electromagnet according to the present invention;

FIG. 3 is an enlarged view taken at A of FIG. 2 according to the present invention;

FIG. 4 is a circuit diagram of the present invention;

FIG. 5 is a circuit diagram of the early warning circuit of the present invention.

In the figure: 1. a brake base; 2. an electromagnet holder; 3. a slide bar; 4. a bottom bar; 5. a moving block; 6. a rotating shaft; 7. a brake arm; 8. brake shoes; 9. a traction sheave; 10. the electromagnet accommodating cavity; 11. an electromagnet; 12. a coil; 13. a limiting back plate; 14. a spring fixing block; 15. a ring-shaped magnet; 16. a compression spring; 17. a resistance rod; 18. a conductive rod; 19. sliding blades; 20. a first power supply; 21. a second power supply; 22. an alarm switch; 23. and an alarm device.

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, a car elevator operation traction structure comprises a brake base 1, an electromagnet fixer 2 is fixedly installed on the upper surface of the brake base 1, sliding rods 3 are fixedly installed on both sides of the middle of the electromagnet fixer 2, a moving block 5 slides on the sliding rods 3 and the bottom rods 4, so that the moving block 5 always keeps vertical and transverse movement, the bottom rods 4 are fixedly connected to both sides of the bottom of the electromagnet fixer 2, rotating shafts 6 are fixedly installed on both sides of the front surface of the bottom end of the brake base 1, a brake arm 7 located on the front surface of the brake base 1 is movably sleeved outside the rotating shafts 6, the moving block 5 is movably sleeved outside the sliding rods 3 and the bottom rods 4, the other end of the brake arm 7 is fixedly connected with the lower end of the moving block 5, a traction sheave 9 is movably sleeved in the middle of the brake base 1, a brake shoe 8 located in the middle of the brake base 1 is fixedly installed on one side of the brake arm 7 close to the traction sheave 9, the brake shoe 8 is fixed in the middle of the brake arm 7, when the brake shoe 8 is not worn, the upper surface and the lower surface of the brake shoe 8 and a traction wheel are simultaneously released in a contracting brake stage, so that the clamping stress area is increased, the abrasion loss of the brake shoe 8 is reduced, and the contracting brake effect of the brake shoe 8 is improved, the electromagnet accommodating cavities 10 are formed in two sides inside the electromagnet fixer 2, the electromagnets 11 are fixedly sleeved on two sides of the electromagnet fixer 2, the coils 12 positioned outside the electromagnets 11 are fixedly installed inside the electromagnet accommodating cavities 10, the roots of the coils 12 and the electromagnets 11 are fixed inside the electromagnet accommodating cavities 10, iron is arranged outside the electromagnet accommodating cavities 10, so that magnetic fields generated by the coils are concentrated, a concentrated electromagnetic force is formed, the limiting back plate 13 is fixedly sleeved at one end, far away from the electromagnet fixer 2, outside the sliding rod 3, the limiting back plate 13 can adjust the initial compression amount of the compression spring 16 through an adjusting bolt, and accordingly the protection clamping force of the elevator is adjusted, a spring fixing block 14 is fixedly sleeved at one end of the outer part of the bottom rod 4 far away from the electromagnet fixer 2, an annular magnet 15 is fixedly installed inside the moving block 5 and positioned outside the sliding rod 3, when a power supply I20 circuit is connected, the magnetic force generated by the electromagnet 11 is the same as that of the annular magnet 15, and after a power supply II 21 is connected, the generated magnetic force is opposite, a compression spring 16 positioned outside the bottom rod 4 is fixedly installed at one side of the spring fixing block 14 close to the electromagnet fixer 2, the other end of the compression spring 16 is fixedly installed with the moving block 5, a resistance rod 17 positioned between the electromagnet 11 and the moving block 5 is fixedly installed at one end of the bottom rod 4 close to the electromagnet fixer 2, an insulating skin is arranged outside the position of the other bottom rod 4 outside the resistance rod 17, when the sliding sheet 19 is in contact with the insulating skin, the circuit of the power supply II 21 is disconnected at the moment, a cavity is formed outside the bottom rod 4 of the moving block 5, and a conductive rod 18 is fixedly installed above the cavity, the outside of the conducting rod 18 is fixedly sleeved with a sliding sheet 19, and the other end of the sliding sheet 19 is contacted with the bottom rod 4.

The two ends of the coil 12 are electrically connected with the positive electrode and the negative electrode of the first power supply 20, the coil 12 and the resistance rod 17 are electrically connected with the positive electrode and the negative electrode of the second power supply 21, the resistance rod 17 is electrically connected with the alarm switch 22, the alarm switch 22 is electrically connected with the alarm device 23, and the circuits of the first power supply 20, the second power supply 21 and the coil 12 are connected in parallel.

Wherein, 19 both sides fixed mounting of gleitbretter 19 has solid fixed ring to fix gleitbretter 19, make gleitbretter 19 can only change along with the change of movable block 5 position, the outer fringe and the 4 surface height parallel and level of sill bar of resistance lever 17, make gleitbretter 19 can not blocked when sliding on sill bar 4 and resistance lever 17, guarantee the smoothness nature of sliding, when brake shoe 8 is not worn and torn, gleitbretter 19 is located resistance lever 17 and is close to movable block 5 one end, gleitbretter 19 contacts with 4 outside insulation skins of sill bar, make coil 12 not insert the circuit this moment, conducting rod 18 all is equipped with the terminal with resistance lever 17 is close to 2 one ends of electro-magnet fixer, make when movable block 5 is close to 2 removals of electro-magnet fixer, the resistance that resistance lever 17 inserted the circuit constantly reduces.

The positive and negative poles of the circuit connected with the power supply I20 and the power supply II 21 are opposite, so that when different circuits are connected, the electromagnet 11 generates opposite magnetic force, the circuit where the power supply I20, the power supply II 21 and the coil 12 are connected in parallel, and the power supply II 21, the resistance rod 17 and the alarm switch 22 are connected in series with the alarm device 23.

Wherein, alarm switch 22 is set up with electrically conductive magnetism piece by the iron core relatively, and electrically conductive magnetism piece keeps away from iron core one side fixed mounting has the spring, and the spring other end is fixed, and when resistance pole 17 department resistance was close minimum, the magnetic force that the iron core produced will electrically conductive magnetism piece actuation for alarm device 23 place circuit switch-on, thereby send out the police dispatch newspaper, remind brake shoe 8 wearing and tearing serious this moment, need change.

The working principle of the embodiment is as follows:

when the brake is released, the coil 12 is electrified with the traction sheave 9 at the moment, so that the electromagnet 11 generates electromagnetic force, the moving block 5 is repelled to the side far away from the electromagnet holder 2, the brake arm 7 is rotated outwards, and the brake shoe 8 is separated from the surface of the traction sheave 9; in the contracting brake, the coil 12 and the traction sheave 9 are powered off, the moving block 5 is pressed to move towards the electromagnet holder 2 due to the outward return of the compression spring 16, and then the brake shoe 8 is in close contact with the traction sheave 9, so that the elevator traction sheave is locked.

When the brake shoe 8 is not seriously worn, when the brake is carried out, the moving block 5 is pushed to one side of the electromagnet holder 2 by the outward elastic force of the compression spring 16 so as to clamp the traction wheel 9, meanwhile, the moving block 5 moves to the outer side of the resistance rod 17 so as to enable the sliding sheet 19 to be in contact with the resistance rod 17, the coil 12 is communicated with the second power supply 21 circuit, the current at the coil 12 is enabled to reversely circulate, the electromagnet 11 is enabled to generate a magnetic pole the same as the annular magnet 15, the attraction of the electromagnet 11 on the moving block 5 is enabled to compensate the protective clamping force of the brake shoe 8 on the traction wheel 9 after the compression spring 16 extends, meanwhile, the larger the wear degree of the brake shoe 8 is, the stronger the magnetic field generated by the electromagnet 11 is, the larger the attraction of the electromagnet 11 on the moving block 5 is, and then the protective clamping force of the brake on the elevator is enabled to be kept stable.

When the brake shoe 8 is seriously worn and is about to fail, the closer the distance between the movable block 5 and the electromagnet fixer 2 is when contracting a brake, the slide sheet 19 is moved to one end of the resistance rod 17 close to the electromagnet fixer 2, the current of the second power supply 21 flowing through the coil 12 reaches the maximum value, the magnetic force generated by the iron core in the alarm switch 22 can enable the conductive magnetic block to overcome the elastic force of the spring to be attracted, the circuit where the alarm device 23 is located is switched on, the alarm device 23 gives an alarm to remind a worker to replace the brake shoe 8.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

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

1. The utility model provides a car elevator operation traction structure, includes brake base (1), its characterized in that: the brake comprises a brake base (1), an electromagnet fixer (2) is fixedly mounted on the upper surface of the brake base (1), sliding rods (3) are fixedly mounted on two sides of the middle of the electromagnet fixer (2), bottom rods (4) are fixedly connected to two sides of the bottom of the electromagnet fixer (2), rotating shafts (6) are fixedly mounted on two sides of the front of the bottom end of the brake base (1), a brake arm (7) located on the front of the brake base (1) is movably sleeved on the outer portion of each rotating shaft (6), a moving block (5) is movably sleeved on the outer portions of the sliding rods (3) and the bottom rods (4), the other end of each brake arm (7) is fixedly connected with the lower end of the corresponding moving block (5), a traction sheave (9) is movably sleeved on the middle of the brake base (1), a brake shoe (8) located in the middle of the brake base (1) is fixedly mounted on one side, close to the traction sheave (9), of each brake arm (7), the electromagnet fixing device is characterized in that an electromagnet accommodating cavity (10) is formed in two sides of the inside of the electromagnet fixing device (2), electromagnets (11) are fixedly sleeved on two sides of the electromagnet fixing device (2), a coil (12) located outside the electromagnet (11) is fixedly installed in the electromagnet accommodating cavity (10), a limiting back plate (13) is fixedly sleeved at one end, away from the electromagnet fixing device (2), of the outside of the sliding rod (3), a spring fixing block (14) is fixedly sleeved at one end, away from the electromagnet fixing device (2), of the outside of the bottom rod (4), an annular magnet (15) is fixedly installed inside the moving block (5) and located outside the sliding rod (3), a compression spring (16) located outside the bottom rod (4) is fixedly installed on one side, close to the electromagnet fixing device (2), of the spring fixing block (14), and the other end of the compression spring (16) is fixedly installed with the moving block (5), one end of the bottom rod (4) close to the electromagnet fixer (2) is fixedly provided with a resistance rod (17) located between the electromagnet (11) and the moving block (5), the moving block (5) is located outside the bottom rod (4) and is provided with a cavity, a conductive rod (18) is fixedly arranged above the cavity, the outside of the conductive rod (18) is fixedly sleeved with a slip sheet (19), the other end of the slip sheet (19) is contacted with the bottom rod (4), two ends of the coil (12) are electrically connected with the positive electrode and the negative electrode of a first power supply (20), the coil (12) and the resistance rod (17) are electrically connected with the positive electrode and the negative electrode of a second power supply (21), the resistance rod (17) is electrically connected with an alarm switch (22), the alarm switch (22) is electrically connected with an alarm device (23), two sides of the slip sheet (19) are fixedly provided with fixing rings for fixing the slip sheet (19), the outer edge of the resistance rod (17) is flush with the outer surface height of the bottom rod (4), when the brake shoe (8) is not worn, the sliding sheet (19) is positioned at one end, close to the moving block (5), of the resistance rod (17), the sliding sheet (19) is in contact with an insulating skin outside the bottom rod (4) at the moment, so that the coil (12) is not connected into a circuit, the conductive rod (18) and one end, close to the electromagnet fixer (2), of the resistance rod (17) are respectively provided with a binding post, the positive and negative poles of the circuit, connected into which the power source I (20) and the power source II (21) are connected, the circuits, where the power source I (20), the power source II (21) and the coil (12) are located, are connected in parallel, the power source II (21) and the resistance rod (17) are connected in series with the alarm device (23), the alarm switch (22) is formed by oppositely arranging the iron core and the conductive magnetic block, a spring is fixedly installed at one side, far away from the iron core, the other end of the spring is fixed, and when the resistance at the resistance rod (17) is close to the minimum, the magnetic force generated by the iron core attracts the conductive magnetic block, so that a circuit where the alarm device (23) is located is switched on, an alarm is given, and the brake shoe (8) is reminded of serious abrasion and needs to be replaced at the moment.