CN110697536B - Safety brake device - Google Patents
Safety brake device Download PDFInfo
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- CN110697536B CN110697536B CN201810743604.3A CN201810743604A CN110697536B CN 110697536 B CN110697536 B CN 110697536B CN 201810743604 A CN201810743604 A CN 201810743604A CN 110697536 B CN110697536 B CN 110697536B
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- 230000007246 mechanism Effects 0.000 claims abstract description 179
- 230000009471 action Effects 0.000 claims description 27
- 230000006835 compression Effects 0.000 claims description 27
- 238000007906 compression Methods 0.000 claims description 27
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 24
- 230000001960 triggered effect Effects 0.000 claims description 13
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 230000002159 abnormal effect Effects 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000004224 protection Effects 0.000 abstract description 5
- 230000002349 favourable effect Effects 0.000 abstract description 2
- 230000004044 response Effects 0.000 description 7
- 238000009434 installation Methods 0.000 description 4
- 239000000725 suspension Substances 0.000 description 3
- 230000004580 weight loss Effects 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005381 potential energy Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
Classifications
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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
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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
- B66B5/16—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well
- B66B5/18—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well and applying frictional retarding forces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B7/00—Other common features of elevators
- B66B7/06—Arrangements of ropes or cables
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
Abstract
The invention relates to a safety braking device, which comprises a triggering mechanism, a lifting mechanism, a self-resetting mechanism and an electronic control unit, wherein the triggering mechanism is connected with the lifting mechanism; the triggering mechanism comprises a weightlessness triggering mechanism, an electromagnetic triggering mechanism and an overspeed triggering mechanism; the weightlessness triggering mechanism triggers the lifting mechanism to act when the weightlessness condition of the elevator car occurs; the overspeed triggering mechanism triggers the lifting mechanism to act when an overspeed condition occurs in the elevator car; the electromagnetic triggering mechanism triggers the lifting mechanism to act when the electronic control unit outputs an electromagnet energizing signal; the self-resetting mechanism resets the weightlessness triggering mechanism, the electromagnetic triggering mechanism or the overspeed triggering mechanism to the original position after the lifting mechanism acts; the device has compact structure, small occupied space and various triggering modes, ensures various protection measures of the elevator when overspeed faults occur, automatically resets the self-resetting mechanism, has high safety coefficient, effectively improves the safety coefficient of elevator operation, essentially solves the safety problem of elevator operation, and is favorable for popularization and application in the market.
Description
Technical Field
The invention relates to the technical field of electric conduction application, in particular to a safety braking device.
Background
The safety gear device for elevator is a safety device for emergency stopping and clamping of the car on the guide rail when the elevator speed exceeds the limit speed set by the elevator speed limiter under the operation of the speed limiter or when the suspension rope breaks and slacks. It provides an effective protection for the safe operation of the elevator, which is generally mounted on the car frame or counterweight frame. Safety tongs are classified into one-way safety tongs and two-way safety tongs.
The traditional elevator safety tongs device is operated by a speed limiter and a lifting mechanism, when the speed limiter reaches a set speed, the speed limiter triggers the safety tongs lifting mechanism, and then the sliding wedge block of the safety tongs is lifted, so that the sliding wedge block clamps a guide rail to stop a car or a counterweight. The governor may be caused by breakage of the suspension rope or other causes to continue to increase the speed of the car to reach the set speed. The traditional elevator safety tongs device needs to be matched with the speed limiter device and the lifting mechanism for use, the safety of an elevator can be ensured under the combined action of the speed limiter device, the lifting mechanism and the lifting mechanism, and the whole system has the problems of relatively complex structure, multiple linkage links, long control chain length, long system response time, high control risk and the like.
At present, the Chinese utility model patent specification with publication number CN105438916A discloses a mechanical automatic unlocking elevator safety gear, the Chinese utility model patent specification with publication number CN104326322A discloses a weightless safety gear, the Chinese utility model patent specification with publication number CN204251108U discloses a progressive weightless safety gear, the Chinese utility model patent specification with publication number CN204125105U discloses an instantaneous weightless safety gear, the safety gear triggers the braking effect when a wire rope is broken, and an original mechanical speed limiting measurement and lifting control mechanism is omitted to a great extent, so that the triggering time is short, the braking process is stable and controllable, and the cost is low. However, the triggering action of the weightless safety tongs in the device must be that the weightless state occurs when the rope is broken in the suspension rope, so that the action of the weightless safety tongs can be triggered, and if overspeed occurs due to no rope breakage in the actual operation of the elevator, the elevator can also have fatal danger.
Since the weightless safety gear can eliminate the safety gear pulling mechanism, the wedge pulling mechanism must be integrated into the weightless safety gear itself. The weightless safety tongs are arranged in a lift car or a counterweight narrow hoistway, and because the space is limited, the safety tongs must be reset after triggering actions of the safety tongs to carry out next braking protection, and the lift car or the counterweight can be lifted upwards after the actions of the safety tongs in the national standard to reset the safety tongs, so that the lift car or the counterweight can also be lifted upwards after the triggering actions of the weightless safety tongs to have the function of resetting the weightless safety tongs. In the prior art, the resetting function is not involved, and the normal use of the safety tongs is affected.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides the safety braking device, which has short system response time, integrates a plurality of triggering modes, satisfies multiple protections when an accident occurs to the elevator, and can effectively improve the safety coefficient of the operation of the elevator.
In order to achieve the above object, the present invention adopts the following technical scheme: the safety braking device comprises a triggering mechanism, a lifting mechanism and a self-resetting mechanism; the triggering mechanism comprises a weightlessness triggering mechanism, an electromagnetic triggering mechanism and an overspeed triggering mechanism;
the weightlessness triggering mechanism triggers the lifting mechanism to act when the weightlessness condition of the elevator car occurs;
the overspeed triggering mechanism triggers the lifting mechanism to act when an overspeed condition occurs in the elevator car;
The electromagnetic triggering mechanism triggers the lifting mechanism to act when the electronic control unit outputs an electromagnet energizing signal;
The self-resetting mechanism resets the weightlessness triggering mechanism, the overspeed triggering mechanism or the electromagnetic triggering mechanism after the lifting mechanism acts;
The electromagnetic trigger mechanism and the self-resetting mechanism are electrically connected with the electronic control unit.
As a preferable mode of the invention, the safety brake device is arranged on the safety tongs body; the lifting mechanism comprises a lifting plate and a sliding wedge block, and the sliding wedge block is arranged on the safety tongs body; a safety pin is arranged at the joint of the lifting plate and the safety tongs body, and an elastic element is arranged between the lifting plate and the safety tongs body; when the elevator car is in an overspeed or weightlessness condition, the triggering mechanism acts to pull out the safety pin, the lifting plate pushes the sliding wedge upwards under the action of the elastic element, and the sliding wedge contacts and clamps the guide rail to manufacture the elevator car.
As a preferable mode of the invention, the safety brake device is arranged on the safety tongs body; the lifting mechanism comprises a lifting plate and a sliding wedge block, and a safety pin is connected between the lifting plate and the safety tongs body; the lifting plate is provided with a steel wire rope, the steel wire rope bypasses the upper end of the safety tongs body and is connected with the sliding wedge block, and the lifting plate and the sliding wedge block are mutually linked through a middle link steel wire rope; when the elevator car is in an overspeed or weightlessness condition, the triggering mechanism acts to pull out the safety pin, and the lifting plate moves downwards, so that the sliding wedge is lifted to move upwards to contact and clamp the guide rail so as to manufacture the elevator car.
As a preferable scheme of the invention, a safety pin hole is arranged at the position of the lifting plate corresponding to the safety tongs body, and the safety pin penetrates through the safety pin hole.
As a preferable scheme of the invention, the weightless triggering mechanism comprises a weight, an electromagnetic iron core and a compression spring; the weight is connected with the safety pin, the weight enables the compression spring to be in a compressed state in the normal operation state of the elevator, and the electromagnetic iron core is arranged between the weight and the compression spring; when the elevator car loses weight, the electromagnetic iron core jacks up the weight under the action of the compression spring, and the weight rotates around a first rotating point to drive the safety pin to separate from the safety tongs body, so that the lifting mechanism is triggered to realize braking.
As a preferable scheme of the invention, the electromagnetic triggering mechanism comprises a weight, an electromagnetic iron core and a compression spring; the weight is connected with the safety pin, the weight enables the compression spring to be in a compressed state, and the electromagnetic iron core is arranged between the weight and the compression spring; when the electromagnetic iron core is in an electrified state, the electromagnetic iron core jacks up the weight under the action of electromagnetic force, and the weight rotates around a first rotating point to drive the safety pin to separate from the safety tongs body, so that the lifting mechanism is triggered to realize braking.
As a preferable scheme of the invention, the overspeed triggering mechanism comprises a weight and a rotating shaft, wherein the rotating shaft penetrates through a pushing disc, and the pushing disc is abutted against the weight; the rotating shaft is penetrated with a compression spring, two or more swinging devices are uniformly arranged on the circumference of the rotating shaft, and the two or more swinging devices are respectively arranged on the circumference of the rotating shaft; the swinging device comprises a crank arm and a swinging block, the middle of the crank arm is rotatably connected through a pin shaft, and the swinging block is arranged at one end of the crank arm; the other end of the crank arm is abutted against the pushing disc; the speed of the rotating shaft responds to the running speed of the elevator car relative to the guide rail; under abnormal conditions, the crank arm swings outwards away from the rotating shaft under the action of the throwing block, the crank arm pushes up the push disc, the push disc pushes up the weight, the weight rotates around the first rotating point to drive the safety pin to separate from the safety tongs body, and then the lifting mechanism is triggered to realize braking.
As a preferable mode of the invention, the self-resetting mechanism comprises a swing arm cam and a driving device; the driving device drives the swing arm cam to rotate and presses the lifting plate back to the state before triggering, and the safety pin locks the lifting plate to complete the resetting process.
As a preferable mode of the invention, the safety pin is arranged at the upper end of the lifting plate.
As a preferable mode of the invention, the safety pin is arranged at the lower end of the lifting plate.
Compared with the prior art, the invention has the beneficial effects that: the safety braking device is compact in structure and small in occupied space, the triggering mechanism, the lifting mechanism and the self-resetting mechanism are integrated on the traditional safety tongs braking device, various triggering modes ensure that the elevator is protected from overspeed faults, the traditional elevator is usually linked with the speed limiter by adopting the lifting mechanism, the steel wire rope is arranged to follow up according to the height of a floor, the tensioning wheel is required to tension the steel wire rope, the structure is complicated in the process, the response time is long, the integrated lifting mechanism effectively solves the problem, the use cost has obvious advantages, the lifting mechanism is integrated into the safety braking device, the self-resetting mechanism is integrated in the device, manual resetting is not required to be carried out by entering an elevator shaft manually, the safety coefficient is high, compared with the traditional safety tongs, the whole safety braking device has the advantages of higher cost, the system has short response time, the multiple triggering modes are integrated, the unexpected protection of the elevator is met, the safety coefficient of the operation of the elevator can be effectively improved, the safety problem of the elevator is essentially solved, and the safety braking device is favorable for popularization and application on the market.
Drawings
FIG. 1 is a schematic diagram of the principle structure of a safety brake device in an embodiment;
FIG. 2 is a front view of a lifting structure in a safety brake device in an embodiment;
FIG. 3 is a left side view of a lifting structure in the safety brake device of the embodiment;
FIG. 4 is a rear view of a lifting structure in a safety brake device in an embodiment;
FIG. 5 is a perspective view of a lifting structure in a safety brake device in an embodiment;
FIG. 6 is a schematic view of the installation of a lifter plate and a safety pin in a safety brake device according to an embodiment;
FIG. 7 is a schematic view of the installation of a lifter plate and a safety pin in a safety brake device according to an embodiment;
FIG. 8 is a schematic view of the installation of a lifter plate and a safety pin in a safety brake device according to an embodiment;
FIG. 9 is a schematic view of the structure of a weight loss trigger mechanism in the safety brake device according to the embodiment;
FIG. 10 is a schematic view of the structure of a weight loss trigger mechanism in a safety brake device according to an embodiment;
FIG. 11 is a schematic view of the structure of an overspeed trigger mechanism in a safety brake device of an embodiment;
FIG. 12 is a schematic view of the structure of an overspeed trigger mechanism in a safety brake device of an embodiment;
fig. 13 is a schematic view of the structure of the self-resetting mechanism mounted in the safety brake device in the embodiment.
Reference numerals: 11. a weightlessness triggering mechanism, 11-6, and a weight; 11-7, compressing a spring; 11-8, an electromagnetic iron core; 11-9, electromagnet shell; 12. an electromagnetic trigger mechanism; 13. an overspeed triggering mechanism; 13-11, pushing the disc; 13-12, crank arms; 13-13, a rotating shaft; 13-130, a second rotation point; 13-14, a throwing block; 2. a lifting mechanism; 2-1, an elastic element; 2-2, lifting plates; 2-3 safety pins; 2-4, a safety tongs body; 2-5, sliding wedge blocks; 2-6, wedge-shaped grooves; 3. a self-resetting mechanism; 3-14, a swing arm cam; 3-15, a driving device; 4. an electronic control unit; 6-1, a first rotation point.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Examples: as shown in fig. 1 to 13, the safety brake device comprises a trigger mechanism, a lifting mechanism 2, a self-resetting mechanism 3 and an electronic control unit 4, wherein the trigger mechanism comprises a weightless trigger mechanism 11, an electromagnetic trigger mechanism 12 and an overspeed trigger mechanism 13, the weightless trigger mechanism 11 is used for triggering the lifting mechanism 2 to act when the elevator car is in a weightless condition, the overspeed trigger mechanism 13 is used for triggering the lifting mechanism 2 to act when the elevator car is in an overspeed condition, the electromagnetic trigger mechanism 12 is used for triggering the lifting mechanism 2 to act when the electronic control unit 4 outputs an electromagnet energizing signal, and the electromagnetic trigger mechanism 12 is used for triggering the lifting mechanism 2 to act after the lifting mechanism 2 acts, and the weightless trigger mechanism 11, the overspeed trigger mechanism 13 or the electromagnetic trigger mechanism 12 is reset.
The electromagnetic triggering mechanism 12 and the self-resetting mechanism 3 are electrically connected with the electronic control unit 4, the electromagnetic triggering signal or the resetting signal is obtained through the electronic control unit 4, and the electronic control unit 4 is an existing elevator controller. In order to make the braking device compact in structure, reduce the occupation of the elevator well space, and effectively guarantee the result of use of elevator, install above-mentioned safety braking device on safety tongs body 2-4, trigger mechanism links to each other with lifting mechanism 2, installs on lifting mechanism 2 and installs on safety tongs body 2-4 from reset mechanism 3.
The working principle of the safety brake device in this embodiment is: when the elevator car is in an abnormal state, an abnormal signal is transmitted to the lifting mechanism 2 through the trigger mechanism, the lifting mechanism 2 brakes the elevator car, and when the abnormal condition of the elevator car is relieved, the lifting mechanism is restored to the state before the trigger mechanism is triggered through the self-resetting mechanism, so that the aim of the safety braking device is fulfilled.
It can be seen that the lifting mechanism 2 is an intermediate link of the safety brake device in this embodiment, and thus has a significant effect in use.
As shown in fig. 2, the pulling mechanism 2 includes a pulling plate 2-2 and a sliding wedge 2-5, the pulling plate 2-2 is fixedly connected to the safety gear body 2-4 through a safety pin 2-3, the sliding wedge 2-5 is slidably mounted on the safety gear body 2-4, an elastic element 2-1 with an energy storage function for tensioning the pulling plate 2-2 is disposed between the pulling plate 2-2 and the safety gear body 2-4, the elastic element 2-1 may be a helical compression spring, may also be implemented by an extension spring or a torsion spring, etc., the main function of the elastic element 2-1 is to provide an upward thrust for the pulling plate 2-2, that is, the pulling plate 2-2 moves upward by using the elastic potential energy of the elastic element 2-1, and the main function of the elastic element 2-1 is to provide an upward thrust for the pulling plate 2-2, that is, the pulling plate 2-2 moves upward by using the elastic potential energy of the elastic element 2-1.
Under the normal running condition of the elevator car, the elastic element 2-1 is in a compressed state, when the elevator car is in an overspeed or weightless condition, the triggering mechanism acts to pull out the safety pin 2-3, the lifting plate 2-2 lifts the sliding wedge block 2-5 upwards under the action of the elastic element 2-1, and then the sliding wedge block 2-5 contacts and clamps the guide rail to manufacture the elevator car.
The lifting plate 2-2 in this embodiment pushes the sliding wedge 2-5 upward from the bottom of the sliding wedge 2-5, and correspondingly, the safety pin 2-3 may be disposed at the upper end of the lifting plate 2-2 to limit the upward movement of the lifting plate 2-2, so as to ensure the normal use of the elevator.
In this embodiment, the top of the sliding wedge block 2-5 may be pulled by a wire rope, and then the sliding wedge block 2-5 bypasses the clamp body 2-4 and is connected with the lifting plate 2-2, when the lifting plate 2-2 moves downward, the sliding wedge block 2-5 is pulled upward by the wire rope to realize the braking action of the elevator car, and correspondingly, the safety pin 2-3 is disposed at the lower end of the lifting plate 2-2 to limit the downward movement of the lifting plate 2-2, so as to ensure the normal use of the elevator.
In order to facilitate the installation of the safety pin 2-3, safety pin holes are formed in the positions, corresponding to the positions of the safety tongs body 2-4, of the lifting plate 2-2, and the safety pin 2-3 is arranged in the safety pin holes in a penetrating manner.
The safety tongs body 2-4 is provided with the wedge-shaped groove 2-6 for sliding the sliding wedge block 2-5, and the end face of the sliding wedge block 2-5 and the surface of the safety tongs body 2-4 are almost positioned on the same plane, so that the safety braking device has compact structure, reduces occupation of space, and avoids abrasion of the sliding wedge block 2-5 to other equipment or parts, and the wedge-shaped groove 2-6 is almost V-shaped, so that the sliding wedge block 2-5 contacts and clamps a guide rail to manufacture a power failure elevator car in abnormal conditions.
As shown in fig. 9 and 10, the weight loss trigger mechanism 11 includes a weight 11-6, an electromagnetic iron core 11-8, and a compression spring 11-7, wherein the weight 11-6 makes the compression spring 11-7 in a compressed state under the action of its own weight, a safety pin 2-3 locks a pulling plate 2-2 so that a sliding wedge 2-5 is positioned at the bottommost end of a safety tongs body 2-4, and just connects the safety pin 2-3 between the weight 11-6 and the pulling plate 2-2, the weight 11-6 is connected with the safety pin 2-3, and the electromagnetic iron core 11-8 is installed between the weight 11-6 and the compression spring 11-7.
When the elevator system is in a rope breakage weightlessness state, the weight of the weight 11-6 is reduced, the compression spring 11-7 releases compression energy to jack the electromagnetic iron core 11-8, the electromagnetic iron core 11-8 jacks the weight 11-6 again, the weight 11-6 rotates around the first rotation point 6-1 for a certain angle and drives the safety pin 2-3 to act and separate from the safety tongs body 2-4, the lifting plate 2-2 in the lifting mechanism 2 is triggered to move upwards or downwards, the sliding wedge block 2-5 is pushed to move upwards to clamp the guide rail, the car is stopped or the counterweight is braked, and the state after the weightlessness triggering mechanism 11 is triggered is shown in fig. 10.
The electromagnet housing 11-9 is arranged on the outer cover of the electromagnet 11-8, the electromagnet housing 11-9 is fixedly arranged on the safety tongs body 2-4, the electromagnetic 11-8 in the safety tongs is effectively protected, the service life of the electromagnetic 11-8 is guaranteed, the use cost is reduced, the electromagnet housing 11-9 is fixedly arranged on the safety tongs body 2-4, and the aim of integrating the weightlessness triggering mechanism 11 on the safety tongs body 2-4 is fulfilled, so that the safety braking device of the embodiment is compact in structure and reasonable in layout.
When the electronic control unit 4 outputs an electrifying signal of the electromagnetic iron core 11-8, the electromagnetic triggering mechanism 12 is executed, when the electromagnetic iron core 11-8 is electrified, the electromagnetic iron core 11-8 jacks up the weight 11-6, the compression spring 11-7 is always in a compressed state in the action process, after the electromagnetic triggering, the weight 11-6 rotates around the first rotating point 6-1 for a certain angle so as to further pull out the safety pin 2-3, the lifting plate 2-2 lifts the sliding wedge block 2-5 upwards under the action of the elastic element 2-1, and the sliding wedge block 2-5 in the safety braking device clamps the guide rail and stops the elevator car.
After the weightless triggering mechanism 11 acts, the lifting plate 2-2 of the safety braking device is retracted to the initial position by the self-resetting mechanism 3, meanwhile, the weight 11-6 presses down the compression spring 11-7 under the action of self weight, the weight 11-6 rotates around the first rotation point 6-1 and drives the safety pin 2-3 to enable the safety pin 2-3 to lock the lifting plate 2-2 again, and the resetting process is completed.
After the electromagnetic trigger mechanism 12 acts, after the lifting plate 2-2 is returned to the initial position from the resetting mechanism 3, electromagnetic iron cores 11-8 are sucked back by electromagnetic signals, the weights 11-6 lose support and return directly, and the safety pin 2-3 is driven to rotate around the first rotating point 6-1, so that the safety pin 2-3 locks the lifting plate 2-2 again, and the resetting process is completed.
The overspeed triggering mechanism 13 mainly aims at the situation that when the elevator overspeed happens, the speed of the elevator car is faster and faster, but the acceleration value is not large but is kept constant, namely uniform acceleration movement occurs, under the working condition, if the traditional safety tongs without the speed limiter can not act all the time, the traditional speed limiter is cancelled, the principle of the speed limiter is only integrated into the safety braking device, the manufacturing cost is saved, the overspeed triggering mechanism 13 mainly comprises a compression spring 11-7, a push disc 13-11, a rotating shaft 13-13 and a whipping device, two or more whipping devices are uniformly arranged on the circumference of the rotating shaft 13-13, the two or more whipping devices comprise a crank arm 13-12 and a whipping block 13-14, the circumference of the rotating shaft 13-13 takes the crank arm 13-12 as a circle center, the overspeed triggering mechanism 13 needs to introduce the running speed of the elevator car relative to a guide rail into the rotating shaft 13-13 of the mechanism, the rotating shaft 13-13 and the guide rail of the guide rail and the guide rail of the elevator car and the rotating shaft and the whipping device can be triggered to be higher and higher along with the preset speed of the whipping device 13-13 along with the preset speed of the center of the rotating shaft 13-13 more than the preset speed is set along with the principle that the upper the center of the elevator car is far away from the center of the rotating shaft 13-13.
As shown in fig. 11, in the normal running state of the elevator system, when the elevator speed does not exceed the trigger speed set by the mechanism, the push plate 13-11 cannot rise to a certain height to jack the weight 11-6, when the elevator car descending speed reaches the trigger speed set by the mechanism more and more quickly, the swing block 13-14 is far away from the rotating shaft 13-13 under the action of centrifugal force, and the crank arm 13-12 swings outwards around the second rotating point 13-130 far away from the rotating shaft 13-13 under the action of the swing block 13-14.
As shown in FIG. 12, crank arm 13-12 pushes up pushing plate 13-11, pushing up plate 13-11 pushes up weight 11-6 again, weight 11-6 rotates a certain angle around first rotation point 6-1 and drives safety pin 2-3 to act, and the triggered state is shown in FIG. 12. The weight 11-6 rotates a certain angle to pull out the safety pin 2-3, the lifting plate 2-2 lifts the sliding wedge block 2-5 upwards under the action of the elastic element 2-1, and the sliding wedge block 2-5 in the safety braking device clamps the guide rail and stops the elevator car.
After the overspeed triggering mechanism 13 acts, the lifting plate 2-2 of the safety braking device of the self-resetting mechanism 3 is retracted to the initial position, the weight of the throwing block 13-14 in the overspeed triggering mechanism 13 and the action of the compression spring 11-7 push the disc 13-11 back to the initial position, meanwhile, the weight 11-6 compresses the compression spring 11-7 under the action of the self weight, the weight 11-6 rotates around the first rotation point 6-1 and drives the safety pin 2-3 to enable the safety pin 2-3 to lock the lifting plate 2-2 again, and the resetting process is completed.
The three triggering modes of the weightlessness triggering mechanism 11, the electromagnetic triggering mechanism 12 and the overspeed triggering mechanism 13 in the safety braking device in the embodiment are mutually independent and are mutually connected through the weight 11-6, but the safety pin 2-3 is pulled out, the lifting plate 2-2 is jacked up under the action of the elastic element 2-1, so that the sliding wedge block 2-5 is driven to ascend, and the sliding wedge block 2-5 is contacted with the elevator guide rail and clamps the guide rail for manufacturing the elevator car. The main function of the self-resetting mechanism 3 is to retract the lifting plate 2-2 to the state before the trigger mechanism acts, and a power source is required for retracting the lifting plate 2-2 to the initial position.
As shown in fig. 13, the self-resetting mechanism 3 in this embodiment includes a swing arm cam 3-14 and a driving device 3-15, after the triggering mechanism is triggered, the lifting plate 2-2 rises to the highest point under the action of the elastic element 2-1, the sliding wedge 2-5 is lifted, when the self-resetting is performed, an external signal source is required to transmit a signal to the driving device 3-15, the driving device 3-15 drives the swing arm cam 3-14 to rotate again, and finally the swing arm cam 14 presses the lifting plate 2 back to the pre-triggering position, and the safety pin 2-3 locks the lifting plate 2-2 again, thereby completing the self-resetting process.
The driving device 3-15 in this embodiment is driven by a motor, and may be driven by other driving modes such as hydraulic, pneumatic, and electric push rods, so as to retract the lifting plate 2-2 to the initial position.
According to the safety braking device in the embodiment, the triggering mechanism, the lifting mechanism 2 and the self-resetting mechanism 3 are integrated on the traditional safety tongs braking device, the safe operation of the elevator is guaranteed through multiple triggering modes, the response time of the system is shortened, the traditional elevator is usually linked with the speed limiter, the steel wire rope is arranged to follow up according to the height of a floor, the steel wire rope is tensioned through a tensioning wheel, the structure is complicated in the process, the response time is long, the integrated lifting mechanism 2 effectively solves the problem, the use cost is obvious, the self-resetting mechanism 3 is integrated in the device while the lifting mechanism 2 is integrated in the safety braking device, the manual operation of the elevator shaft is not needed, the safety coefficient is high, compared with the traditional safety tongs, the cost is more advantageous, the response time of the system is short, multiple triggering modes are integrated, the safety coefficient of the elevator operation can be effectively improved when the elevator is met, the safety coefficient of the elevator operation is essentially solved, and the popularization and the application of the safety braking device in the market are facilitated.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention; thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Although the reference numerals in the figures are used more herein: 11. a weightlessness triggering mechanism, 11-6, and a weight; 11-7, compressing a spring; 11-8, an electromagnetic iron core; 11-9, electromagnet shell; 12. an electromagnetic trigger mechanism; 13. an overspeed triggering mechanism; 13-11, pushing the disc; 13-12, crank arms; 13-13, a rotating shaft; 13-130, a second rotation point; 13-14, a throwing block; 2. a lifting mechanism; 2-1, an elastic element; 2-2, lifting plates; 2-3 safety pins; 2-4, a safety tongs body; 2-5, sliding wedge blocks; 2-6, wedge-shaped grooves; 3. a self-resetting mechanism; 3-14, a swing arm cam; 3-15, a driving device; 4. an electronic control unit; 6-1, a first rotation point, etc., but does not exclude the possibility of using other terms. These terms are used merely for convenience in describing and explaining the nature of the invention; they are to be interpreted as any additional limitation that is not inconsistent with the spirit of the present invention.
Claims (8)
1. Safety braking device, its characterized in that: comprises a triggering mechanism, a lifting mechanism (2), a self-resetting mechanism (3) and an electronic control unit (4); the triggering mechanism comprises a weightlessness triggering mechanism (11), an electromagnetic triggering mechanism (12) and an overspeed triggering mechanism (13); the weightlessness triggering mechanism (11) triggers the lifting mechanism (2) to act when the weightlessness condition of the elevator car occurs; an overspeed triggering mechanism (13) which triggers the lifting mechanism (2) to act when an overspeed condition occurs in the elevator car; the electromagnetic triggering mechanism (12), when the electronic control unit (4) outputs the electromagnet energizing signal, the electromagnetic triggering mechanism (12) triggers the lifting mechanism (2) to act; the self-resetting mechanism (3) resets the weightlessness triggering mechanism (11), the overspeed triggering mechanism (13) or the electromagnetic triggering mechanism (12) after the lifting mechanism (2) acts; the electromagnetic triggering mechanism (12) and the self-resetting mechanism (3) are electrically connected with the electronic control unit (4);
The safety braking device is arranged on the safety tongs body (2-4); the lifting mechanism (2) comprises a lifting plate (2-2) and a sliding wedge block (2-5), and the sliding wedge block (2-5) is arranged on the safety tongs body (2-4); a safety pin (2-3) is arranged at the joint of the lifting plate (2-2) and the safety tongs body (2-4), and an elastic element (2-1) is arranged between the lifting plate (2-2) and the safety tongs body (2-4); when the elevator car is in an overspeed or weightlessness condition, the triggering mechanism acts to pull out the safety pin (2-3), the lifting plate (2-2) pushes the sliding wedge block (2-5) upwards under the action of the elastic element (2-1), and the sliding wedge block (2-5) contacts and clamps the guide rail to manufacture the elevator car; or the safety braking device is arranged on the safety tongs body (2-4); the lifting mechanism (2) comprises a lifting plate (2-2) and a sliding wedge block (2-5), and a safety pin (2-3) is connected between the lifting plate (2-2) and the safety tongs body (2-4); the lifting plate (2-2) is provided with a steel wire rope, the steel wire rope bypasses the upper end of the safety tongs body (2-4) and is connected with the sliding wedge block (2-5), and the lifting plate (2-2) and the sliding wedge block (2-5) are mutually linked through an intermediate link steel wire rope; when the elevator car is in an overspeed or weightlessness condition, the triggering mechanism acts to pull out the safety pin (2-3), the lifting plate (2-2) moves downwards, and then the sliding wedge blocks (2-5) are lifted to move upwards to contact and clamp the guide rail so as to manufacture the elevator car with power failure;
The safety tongs body (2-4) is provided with a wedge-shaped groove (2-6) for sliding the sliding wedge block (2-5), and the wedge-shaped groove (2-6) is V-shaped.
2. The safety brake device according to claim 1, wherein: the lifting plate (2-2) is provided with a safety pin hole at a position corresponding to the safety tongs body (2-4), and the safety pin (2-3) is arranged in the safety pin hole in a penetrating mode.
3. The safety brake device according to claim 1, wherein: the weightlessness triggering mechanism (11) comprises a weight (11-6), an electromagnetic iron core (11-8) and a compression spring (11-7); the weight (11-6) is connected with the safety pin (2-3), the weight (11-6) enables the compression spring (11-7) to be in a compressed state in the normal operation state of the elevator, and the electromagnetic iron core (11-8) is arranged between the weight (11-6) and the compression spring (11-7); when the elevator car loses weight, the electromagnetic iron core (11-8) jacks up the weight (11-6) under the action of the compression spring (11-7), and the weight (11-6) rotates around the first rotating point (6-1) to drive the safety pin (2-3) to separate from the safety tongs body (2-4), so that the lifting mechanism (2) is triggered to realize braking.
4. The safety brake device according to claim 1, wherein: the electromagnetic triggering mechanism (12) comprises a weight (11-6), an electromagnetic iron core (11-8) and a compression spring (11-7); the weight block (11-6) is connected with the safety pin (2-3), the weight block (11-6) enables the compression spring (11-7) to be in a compressed state, and the electromagnetic iron core (11-8) is arranged between the weight block (11-6) and the compression spring (11-7); when the electromagnetic iron core (11-8) is in an electrified state, the electromagnetic iron core (11-8) jacks up the weight (11-6) under the action of electromagnetic force, and the weight (11-6) rotates around the first rotating point (6-1) to drive the safety pin (2-3) to separate from the safety tongs body (2-4), so that the lifting mechanism (2) is triggered to realize braking.
5. The safety brake device according to claim 1, wherein: the overspeed triggering mechanism (13) comprises a weight (11-6) and a rotating shaft (13-13), wherein the rotating shaft (13-13) is arranged on the pushing disc (13-11) in a penetrating mode, and the pushing disc (13-11) is abutted against the weight (11-6); the rotating shaft (13-13) is penetrated with a compression spring (11-7), two or more swinging devices are uniformly arranged on the circumference of the rotating shaft (13-13), and the two or more swinging devices are respectively arranged on the circumference of the rotating shaft (13-13); the swinging device comprises a crank arm (13-12) and a swinging block (13-14), wherein the middle of the crank arm (13-12) is rotatably connected through a pin shaft, and the swinging block (13-14) is arranged at one end of the crank arm (13-12); the other end of the crank arm (13-12) is abutted against the pushing disc (13-11); the speed of the rotating shaft (13-13) responds to the running speed of the elevator car relative to the guide rail; under abnormal conditions, the crank arm (13-12) swings outwards away from the rotating shaft (13-13) under the action of the throwing block (13-14), the crank arm (13-12) pushes the pushing disc (13-11) upwards, the pushing disc (13-11) pushes the lifting block (11-6), the weight (11-6) rotates around the first rotating point (6-1) to drive the safety pin (2-3) to separate from the safety tongs body (2-4), and then the lifting mechanism (2) is triggered to realize braking.
6. The safety brake device according to claim 5, wherein: the self-resetting mechanism (3) comprises a swing arm cam (3-14) and a driving device (3-15); the driving device (3-15) drives the swing arm cam (3-14) to rotate and presses the lifting plate (2-2) back to the pre-triggering state, and the safety pin (2-3) locks the lifting plate (2-2) to finish the resetting process.
7. A safety brake device according to claim 1, wherein: the safety pin (2-3) is arranged at the upper end of the lifting plate (2-2).
8. A safety brake device according to claim 1, wherein: the safety pin (2-3) is arranged at the lower end of the lifting plate (2-2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810743604.3A CN110697536B (en) | 2018-07-09 | 2018-07-09 | Safety brake device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810743604.3A CN110697536B (en) | 2018-07-09 | 2018-07-09 | Safety brake device |
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| CN110697536A CN110697536A (en) | 2020-01-17 |
| CN110697536B true CN110697536B (en) | 2024-05-24 |
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| CN201810743604.3A Active CN110697536B (en) | 2018-07-09 | 2018-07-09 | Safety brake device |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111747262A (en) * | 2020-08-05 | 2020-10-09 | 乐天电梯部件(浙江)有限公司 | Electric trigger type safety tongs |
| CN114426235B (en) * | 2021-12-31 | 2024-03-19 | 宁波奥德普电梯部件有限公司 | Electronic safety gear trigger for elevator |
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| MY135853A (en) * | 2003-02-04 | 2008-07-31 | Inventio Ag | Safety device for an elevator |
| WO2012080103A1 (en) * | 2010-12-17 | 2012-06-21 | Inventio Ag | Monitoring device for detecting an undesired travel of an elevator cab from a standstill |
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| CN1789102A (en) * | 2004-12-17 | 2006-06-21 | 中国建筑科学研究院建筑机械化研究分院 | Elevator overspeed protecting device |
| CN102862893A (en) * | 2011-07-07 | 2013-01-09 | 刘小泉 | Lifting plier device of elevator car |
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| CN110697536A (en) | 2020-01-17 |
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