CN110436296A - A kind of towed elevator emergency braking limiter of speed - Google Patents
A kind of towed elevator emergency braking limiter of speed Download PDFInfo
- Publication number
- CN110436296A CN110436296A CN201810410881.2A CN201810410881A CN110436296A CN 110436296 A CN110436296 A CN 110436296A CN 201810410881 A CN201810410881 A CN 201810410881A CN 110436296 A CN110436296 A CN 110436296A
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- Prior art keywords
- driving shaft
- driven shaft
- spring
- hammer
- shaft
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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
-
- 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
-
- 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
Abstract
The invention discloses a kind of towed elevator emergency braking limiter of speeds, the associated driving shaft of wirerope and driven shaft associated with the braking safety tongs of carriage including being arranged on the rack, centrifugal clutching structure is equipped between driven shaft and driving shaft, it is equipped with limit sleeve on the rack, the part that limit sleeve is protruded on driven shaft is arranged with braking wind spring, one end of braking wind spring is connect with rack, the other end and driven axis connection, when the revolving speed of driving shaft is more than or equal to rated speed, centrifugal clutching structure engages driving shaft with driven shaft；When driven shaft rotates forward, braking wind spring is gradually tightly around on driven shaft, until driven shaft stops operating；When driven shaft rotates backward, braking wind spring is gradually discharged and is tightly attached on limit sleeve, until driven shaft stops operating.The present invention can not only sense the lifting speed of carriage, but also can realize that two-way step-by-step brake is braked to the carriage for deviateing normal movement speed.
Description
Technical field
The present invention relates to the braking system technical fields of towed elevator, use more particularly, to a kind of towed elevator emergency braking
Limiter of speed.
Background technique
In towed elevator, sure brake system is the safety device of a solar obligation, existing sure brake system
Limiter of speed including the speed of service for sensing carriage, for occurring realizing mandatory system to elevator when hypervelocity is mobile in carriage
Dynamic brake apparatus, limiter of speed generally include a driving shaft, pulley are arranged on driving shaft, for draw the wirerope of carriage around
It is located on pulley.When carriage lifting, wirerope is rotated by pulley driving driving shaft；When car speeding lifting, limiter of speed
It senses the revolving speed of driving shaft and acts, to drive brake apparatus to act to brake carriage, and then ensure the safety of elevator.In
It is provided in the national safety standard of elevator, when the carriage speed of service is more than normal speed 115%, limiter of speed should be started, thus
Drive brake apparatus braking carriage or counterweight.Brake apparatus is divided into carriage braking and counterweight brakes two kinds, according to different peaces
Full requirement can be individually using also using simultaneously, and when carriage exceeds the speed limit movement on guide rail, the brake apparatus for braking carriage passes through
Carriage is braked to the frictional force for clamping down on generation of guide rail.And the brake apparatus for braking counterweight passes through the wirerope to connection counterweight
The frictional force for clamping down on generation brake counterweight, and then realize the braking of carriage.
Above-mentioned sure brake system needs to be respectively set limiter of speed and brake apparatus, therefore its complicated integral structure.In addition,
It is serious that the passenger in carriage may be made to come to harm since carriage can be made to generate greatly impact in emergency braking, for this purpose,
People have invented some sure brake systems with buffering effect.For example, one kind is disclosed " progressive in Chinese patent literature
Formula centrifugal brake ", publication No. CN107089610A, the brake for specifically including rotating shaft and being sleeved on rotating shaft
Structure, arrestment mechanism include getting rid of block, brake disc and guide pipe, and guide pipe is socketed in rotating shaft outer wall, and guiding is stretched out in rotating shaft front end
Corresponding be equipped with of pipe gets rid of block;Brake disc is cylindrical body, and by Screw assembly in guiding pipe outer wall, front end extends to revolution for its rear end
It in front of axis, gets rid of block and is displaced by centrifugal action to brake disc inner wall, brake disc inner wall is equipped with the corresponding ratchet for getting rid of block, outside guide pipe
Wall is equipped with the resilient snubber for contradicting brake disc.Block is thrown away by centrifugal force, block and brake disc occlusion is got rid of after throwing away, passes through
Rotating shaft driving brake disc is displaced along guide pipe and squeezes buffer spring, to form step-by-step brake, reduces moment brake pair
The influence and damage of carriage and running part, avoid the sense of discomfort of passenger in elevator.
Limiter of speed and brake apparatus are set together by above-mentioned brake, and have a buffering effect in braking,
However the brake have following defects that the brake can only overspeed rotation starting safety arrestment to direction effect,
That is, we at least need to be arranged two sets of brakes, so that the hypervelocity to carriage rises (rushing to summit) and hypervelocity decline (crouching
Bottom) each serve as the effect of safety arrestment.
Summary of the invention
The purpose of the present invention is to solve need that speed limit is respectively set present in existing elevator safety brake system
Device and brake apparatus, to provide a kind of towed elevator emergency braking limiter of speed the problem of making complicated integral structure, can both feel
The lifting speed of carriage is surveyed, and can realize that two-way step-by-step brake is braked to the carriage for deviateing normal movement speed, so that it is guaranteed that
Carriage safety with higher, and be conducive to simplify the structure of braking system.
To achieve the goals above, the invention adopts the following technical scheme:
A kind of towed elevator emergency braking limiter of speed, including rack, be arranged on the rack and and traction carriage wirerope phase
Associated driving shaft is additionally provided with the driven shaft coaxial with driving shaft in rack, is equipped between driven shaft and driving shaft centrifugal
Clutch structure is fixedly connected with limit sleeve in the rack, and one end of the driven shaft is protruded into the limit sleeve, and in institute
State protruded on driven shaft limit sleeve part be arranged with for limit driven shaft rotation braking wind spring, when the revolving speed of driving shaft is low
When rated speed, centrifugal clutching structure makes driving shaft, driven shaft be in discrete state；When the revolving speed of driving shaft is more than or equal to
When rated speed, centrifugal clutching structure engages driving shaft with driven shaft, and driving shaft drives driven shaft rotation；When driven shaft just
To when rotation, braking wind spring is gradually tightly around on driven shaft, until driven shaft stops operating；When driven shaft rotates backward, system
Dynamic wind spring is gradually discharged and is tightly attached on limit sleeve inner sidewall, until driven shaft stops operating.
Limiter of speed of the invention not only can detect the movement speed of carriage, but also can be used for making carriage retarding braking, master therein
Moving axis can be associated with the wirerope of traction carriage simply by a pulley, to make the lifting speed of driving shaft and carriage
Form simple linear relationship.When carriage is in halted state or is gone up and down with normal speed, centrifugal clutching structure makes to lead
Moving axis, driven shaft are in discrete state, driving shaft idle running at this time, therefore will not be formed and be braked to carriage.When elevator occurs
When failure, carriage fast lifting, driving shaft quick rotation therewith, centrifugal clutching structure can be under the influence of centrifugal force at this time
Engage driven shaft and driving shaft, so that driven shaft be driven to rotate.When driving shaft drives driven shaft to rotate forward, it is set in
Braking wind spring on driven shaft forms a load torque to driven shaft, makees so as to form a buffer deceleration to driving shaft
With.Gradually tighten, when braking wind spring until when tightly around on driven shaft, driven shaft is to stop operating, correspondingly, driving shaft and
Pulley stops operating, to realize the complete braking to the wirerope of traction carriage.Alternatively, we are formed using wirerope
Gradually increase pulling force driving safety tongs act to brake car guide rail；When driving shaft drives driven shaft to rotate backward, system
Dynamic wind spring gradually loosens, to form a load torque to driven shaft, and then can form a buffer deceleration to driving shaft and make
With.It gradually discharges, when braking wind spring until when being tightly attached on the inner sidewall of limit sleeve, driven shaft stops operating, correspondingly, main
Moving axis and pulley stop operating, to realize the braking to carriage.That is, on the one hand, driving shaft of the invention passes through
Driven shaft can drive safety tongs to act and brake carriage, and on the other hand, driven shaft can realize locking, Jin Ershi in both forward and reverse directions again
Buffer deceleration and safety arrestment of the existing carriage in lifting extremely.
Preferably, the driving shaft is equipped with pulley, the wirerope for drawing carriage is wound around the pulley, institute
State centrifugal clutching structure include governor spring, can be arranged in radially sliding face of pulley get rid of hammer and spring base, with it is driven
The limited block that axis is connected is equipped with articulated linkage getting rid of between hammer and spring base, the governor spring is located remotely from spring base
The initial position of driving shaft, spring base make to get rid of initial position of the hammer in close driving shaft by articulated linkage, active at this time
Axis, driven shaft are in discrete state；When the revolving speed of driving shaft is more than or equal to rated speed, centrifugal force makes to get rid of hammer radial outward movement extremely
Final position far from driving shaft, get rid of hammer makes spring base diameter move inward to the final position close to driving shaft by articulated linkage,
The outer end of hammer is got rid of against limited block, driven shaft follows driving shaft to rotate together.
Driving shaft can be made to easily form with carriage by pulley and the wirerope being wound around on pulley to be associated with, to make
Driving shaft can form simple linear relationship with the lifting speed of carriage.It is understood that we can be in the end face of pulley
Upper setting radial T-slot or dovetail groove, to make to get rid of hammer and spring base and can be radially moved along T-slot or dovetail groove.By
In getting rid of equipped with articulated linkage between hammer and spring base, therefore, linkage can be formed by getting rid of hammer and spring base.It is displaced outwardly when getting rid of hammer
When, spring base moves inward, conversely, getting rid of hammer when spring base is displaced outwardly and moving inward.Governor spring driving spring therein
Seat is displaced outwardly, so that spring base be made to be located in the initial position in outside, correspondingly, spring base at this time is made by articulated linkage
The initial position that hammer is located in inside is got rid of, driven shaft and driving shaft at this time is in discrete state.When pulley rotation, pulley end
Getting rid of for face is displaced outwardly after hammer by the effect of a centrifugal force, and the hammer that gets rid of at this time is overcome by articulated linkage with flexible spring seat
The elastic force of governor spring and move inward；When the revolving speed of pulley and driving shaft reaches rated speed, centrifugal force makes to get rid of hammer diameter
The final position far from driving shaft is moved outward to, the hammer that gets rid of at this time moves inward to spring base diameter close to actively by articulated linkage
The outer end for getting rid of hammer of the final position of axis, rotation can be against being arranged in driven shaft upper limit position block, driven shaft and active at this time
Axis is in engagement state, on the one hand driven shaft follows driving shaft to rotate together, act safety tongs by related organization, thus
Realize the retarding braking of carriage；On the other hand, braking wind spring forms a resistive torque being gradually increased to the rotation of driven shaft,
So as to realize deceleration and buffer-braking to carriage.It is understood that we can governor spring through reasonable settings bullet
The parameters such as property coefficient and preload elastic force, are conveniently adjusted the rated speed of driving shaft and get rid of the movement speed of hammer, and then adjust
Save the retarding braking performance of carriage.
Preferably, the quantity for getting rid of hammer is 2, and it is symmetricly set on the two sides of driving shaft；The number of the spring base
Amount is 2, and is symmetricly set on the two sides of driving shaft, gets rid of hammer and spring base around driving shaft in cross distribution, each gets rid of hammer and 2
The articulated linkage, 4 hinged diamondwises of articulated linkage, between spring base and driving shaft are respectively equipped between a spring base
It is respectively equipped with the governor spring, described governor spring one end compresses spring base, and the other end compresses driving shaft.
Symmetrically arranged 2 are got rid of hammer, are advantageously implemented dynamic balancing when sliding rotation, and can reduce the weight for individually getting rid of hammer
And outer dimension.
Preferably, the two sides for getting rid of outer end of the hammer far from driving shaft are the first inclined-plane, to make the outer end shape for getting rid of hammer
At swallow-tailed bond end big outside and small inside, the driven shaft is equipped with overlap joint sleeve close to driving shaft one end, in the lap joint sleeve
The inner sidewall of cylinder be equipped with 4 described in limited block, the two sides of the limited block be adapted to first inclined-plane it is second oblique
Face, to make limited block in dovetail shaped.
Swallow-tailed lap segment is arranged in the outer end for getting rid of hammer of the invention, and correspondingly, limited block is equally in dovetail shaped.This
Sample, when get rid of hammer it is protruding when, the first inclined-plane of swallow-tailed lap segment can make driven shaft against the second inclined-plane of limited block
It is engaged with driving shaft.Lap segment and limited block at this time forms an overhead kick structure, to can avoid leading because of the decline of revolving speed
The retraction of hammer is got rid of in cause, and then can realize the thorough braking of carriage.
Preferably, the rack is equipped with electromagnet at one end on the driving shaft far from driven shaft, in driving shaft
Equipped with sliding jack, the armature column by the solenoid actuated is equipped in the sliding jack, the armature column protrudes into sliding and inserts
End in hole is equipped with the extrusion head of cone, and the driving shaft is equipped with radial squeezing through-hole, and the hammer that gets rid of is close to actively
The inner end of axis is equipped with the extruded segment fitted in squeezing through-hole, and the end of extruded segment, which is equipped with, squeezes inclined-plane, when solenoid actuated is held in the mouth
When iron prop is moved to application position, the circular conical surface of armature column extrusion head, which reclines, squeezes inclined-plane, to make to get rid of hammer radial outward movement to end
Stop bit is set.
When the control system of elevator detects that elevator breaks down to fast lifting, or detect that limiter of speed occurs
Mechanical breakdown and when can not act to brake carriage, control system can be moved axially by solenoid actuated armature column, be held in the mouth at this time
What the extrusion head of iron prop end can squeeze diametrically opposed arrangement gets rid of hammer, makes to get rid of on the bond end and driven shaft of hammer outer end
Limited block overlap joint, and then engage driven shaft with driving shaft, to realize buffer deceleration and the braking to carriage, thus further
Improve the safety of elevator.That is, when limiter of speed because the long period is not operating and itself can not be relied on by leading to get rid of hammer
When centrifugal force is mobile, it can ensure that carriage realizes buffer-braking by electromagnet.
Preferably, being equipped with tapped through hole with governor spring corresponding position on the spring base, it is equipped with and adjusts in tapped through hole
Screw is saved, is equipped with spring positioning slot with governor spring corresponding position on driving shaft, one end of the governor spring is positioned at driving shaft
In upper corresponding spring positioning slot, the other end of governor spring is protruded into the tapped through hole of corresponding spring base and against the tune
Save screw.
On the one hand tapped through hole on spring base can make governor spring reliable location, while the peace of conveniently adjusted screw
Dress is convenient to the preload elastic force of adjustment governor spring by the adjusting screw in rotation tapped through hole.
Therefore, the invention has the following beneficial effects: the lifting speeds that can not only sense carriage, but also can be to deviation normal movement
The carriage of speed realizes two-way step-by-step brake braking, so that it is guaranteed that carriage safety with higher, and be conducive to simplify system
The structure of dynamic system.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the invention.
Fig. 2 is the A-A cross-sectional view in Fig. 1
Fig. 3 is the side sectional view of Fig. 1.
Fig. 4 is another structural schematic diagram of the invention.
In figure: 1, rack 11, limit sleeve 2, driving shaft 21, pulley 211, slippage slot 22, get rid of hammer 221, bond end
222, the first inclined-plane 223, extruded segment 23, spring base 24, articulated linkage 25, sliding jack 3, driven shaft 31, limited block
311, the second inclined-plane 32, governor spring 33, overlap joint sleeve 4, electromagnet 41, armature column 411, extrusion head 5, adjusting screw
6, wind spring is braked.
Specific embodiment
The present invention will be further described with specific embodiment with reference to the accompanying drawing.
Embodiment 1: it as shown in Figure 1, a kind of towed elevator emergency braking limiter of speed, including rack 1, is arranged on the rack
Driving shaft 2, with the coaxially arranged driven shaft 3 of driving shaft, a pulley 21 is keyed on driving shaft, for drawing the steel of carriage
Cord is wound around on pulley.When carriage is normally gone up and down, wirerope can drive pulley rotation, and then drive driving shaft rotation,
And the rotation of driving shaft and the lifting speed of carriage are linear.
In addition, centrifugal clutching structure can be arranged in we between driven shaft and driving shaft, when the revolving speed of driving shaft reaches
Or when more than a rated value, centrifugal clutching structure can make one end phase of driving shaft and driven shaft under the influence of centrifugal force
Driven shaft rotation can be driven in engagement, driving shaft；When the revolving speed of driving shaft is lower than rated value, centrifugal clutching structure makes actively
Axis and driven shaft are in discrete state, and driving shaft dallies at this time, and driven shaft then remains static.
Good buffering effect when in order to realize safe clamp brake, limiter of speed settable one for limiting driven shaft rotation
Damping spring.We need first to be fixedly connected with a limit sleeve 11 on the rack, and driven shaft is protruded into far from one end of driving shaft
In limit sleeve, and gap is formed between driven shaft and limit sleeve, the part that driven shaft protrudes into limit sleeve is arranged a braking volume
Spring 6, the one end for braking wind spring are fixedly connected with rack, and the other end for braking wind spring is fixedly connected with driven shaft, the braking wind spring
It is construed as limiting the damping spring of driven shaft rotation.When driving shaft drives driven shaft to rotate forward, braking wind spring is gradually tightened,
Correspondingly, the pulling force of wirerope is gradually increased on pulley, and static friction is formed between pulley and wirerope.When braking wind spring is finally tight
When being wound on driven shaft, driven shaft stops operating, and correspondingly, driving shaft and pulley stop operating, wirerope and pulley it
Between form dynamic friction, the pulling force of wirerope reaches maximum at this time.We drive the caliper of safety tongs using the pulling force of wirerope
Movement, to make the braking friction of safety tongs formation from small to large.Analogously, when driving shaft drives driven shaft to rotate backward
When, braking wind spring gradually loosens, and correspondingly, the pulling force of wirerope is gradually increased on pulley, is formed between pulley and wirerope quiet
Friction.When brake wind spring be finally tightly attached on the inner sidewall of limit sleeve when, driven shaft stops operating, correspondingly, driving shaft and
Pulley stops operating, and dynamic friction is formed between wirerope and pulley, and the pulling force of wirerope reaches maximum at this time, to make safety tongs
Form the plugging frictional force being gradually increased.That is, braking wind spring makes wirerope institute in the braking process of carriage
The pulling force of output, which is started from scratch, to be gradually increased, so that safety tongs be made to form the friction brake force being gradually increased to car guide rail.With
The spring of other forms compares, and braking wind spring has biggish rotation amount of zoom, reduces retarder on the one hand can dramatically
Outer dimension, while buffering effect when braking can be effectively improved, it avoids forming car guide rail and destroy, and then can realize system
The detection of the simulation of real scenes of dynamic system, it is ensured that braking system safely, effectively, reliably.
As shown in Figure 1, Figure 2, Figure 3 shows, centrifugal clutching structure of the invention includes governor spring 32, is disposed radially within cunning
Hammer 22 and spring base 23, the limited block 31 that is connected with driven shaft are got rid of in wheel end face, therein to get rid of hammer and spring base fits in cunning
In the slippage slot 211 radially arranged of wheel end face, which can be T-slot or dovetail groove, to make to get rid of hammer and spring base can
It is moved radially in the end face of pulley.In addition, articulated linkage 24 is arranged between hammer and spring base getting rid of, articulated linkage one end and hammer is got rid of
Hingedly, the other end and spring base are hinged.And governor spring be located on pulley be arranged spring base slippage slot in, governor spring it is interior
End compresses driving shaft, and outer end compresses spring base, so that spring base be made to be located remotely from the initial position of driving shaft, spring base passes through hinge
Connective pole makes to get rid of hammer in the initial position close to driving shaft, and driving shaft and driven shaft at this time is in discrete state.When actively
When the rotation of axis, centrifugal force makes to get rid of to hammer into shape to be moved outwards along slippage slot, and getting rid of hammer moves spring base diameter inwardly by articulated linkage, this
When governor spring compressed；When the revolving speed of driving shaft meets or exceeds rated speed, centrifugal force makes to get rid of hammer along slippage slot
It is moved outwards to the final position far from driving shaft, getting rid of hammer then moves inward to spring base diameter close to driving shaft by articulated linkage
Final position, get rid of the outer end of hammer against limited block, driven shaft follows driving shaft to rotate together.
As a preferred embodiment, the criss-cross slippage slot of square crossing can be arranged in the end face of pulley in we, accordingly
Ground gets rid of hammer in one of them slippage slot described in setting 2, and 2 are got rid of the two sides hammered into shape and be arranged symmetrically in driving shaft；Phase
Similarly, spring base described in setting 2,2 spring bases are arranged symmetrically in the two sides of driving shaft, make in another slippage slot
Hammer and spring base are got rid of around driving shaft in cross distribution.Certainly, it would be desirable to be set respectively between hammer and 2 spring bases in each get rid of
The articulated linkage, 4 hinged diamondwises of articulated linkage are set, and the tune is respectively set between spring base and driving shaft
Fast spring.In order to make governor spring reliable location, we can be close on the inside of driving shaft and driving shaft in spring base
Positioning groove is respectively set on the outside of spring base, the outer end of governor spring is located in the positioning groove that spring is done and compresses spring
Seat, the inner end of governor spring are located in the positioning groove of driving shaft and compress driving shaft.
Further, it gets rid of and hammers the first inclined-plane that the two sides setting of the outer end far from driving shaft is inclined outwardly from the inside to the outside into shape
222, so that the outer end for getting rid of hammer be made to form swallow-tailed bond end 221 big outside and small inside.And driven shaft is solid close to driving shaft one end
Fixed setting overlap joint sleeve 33, the limited block described in setting 4 on the inner sidewall of overlap joint sleeve, and 4 limited blocks are in circumference
Direction is uniformly distributed.The two sides of limited block are the second inclined-plane 311 being adapted to first inclined-plane, to make limited block in dovetail
Shape.When getting rid of hammer protruding slippage slot under the influence of centrifugal force, the first inclined-plane of swallow-tailed lap segment can be against limit
Second inclined-plane of position block, engages driven shaft with driving shaft.Lap segment and limited block at this time forms an overhead kick structure, from
And it can avoid leading to the retraction for getting rid of hammer because of the decline of revolving speed, and then can realize the thorough braking of carriage.
In order to ensure the reliability of carriage braking, we can also be on the rack on driving shaft far from one end of driven shaft
Place setting electromagnet 4, driving shaft far from be coaxially disposed on the end face of driven shaft sliding jack 25, sliding jack in plug by
The armature column 41 of solenoid actuated, the armature column are connected with a reset spring (not shown), and armature column protrudes into sliding and inserts
The extrusion head 411 of end setting cone in hole.Correspondingly, the squeezing through-hole of rectangle is radially set on driving shaft, and
The extruded segment 223 hammered into shape reducing close to the setting of the inner end of driving shaft is got rid of, in extruded segment and get rid of one step of formation between hammer.
When getting rid of hammer in initial position, extruded segment is fitted in squeezing through-hole.In addition, the end setting of extruded segment squeezes inclined-plane, it should
The inclined direction for squeezing inclined-plane is consistent with the inclined direction of the circular conical surface of the extrusion head of armature column.
When elevator is when operating normally, electromagnet is powered and generates magnetic attraction, so that armature column be made to overcome reset spring
Elastic force and be located at sliding jack outer end initial position；When the control system of elevator detects that elevator failure, carriage are out of control
When with lower than the lifting of the maximum speed of setting, or detect limiter of speed there was a mechanical failure and when can not act, control system
Obtain electromagnet electric, solenoid actuated armature column moves inwardly into application position, the circle of armature column extrusion head in sliding jack
The conical surface, which reclines, gets rid of the extruding inclined-plane of hammer, thus push get rid of hammer be moved outwards get rid of to final position the bond end of hammer outer end with it is driven
Limited block overlap joint on axis, driven shaft engages with driving shaft, and the buffer deceleration to carriage and braking can be realized, so as into one
Step improves the safety of elevator.
Finally, tapped through hole can be arranged with governor spring corresponding position on spring base in we, connect in tapped through hole internal screw thread
It connects and adjusts screw 5, disposition spring positioning slot corresponding with governor spring on driving shaft, the inner end of governor spring is positioned on driving shaft
In corresponding spring positioning slot, the outer end of governor spring is protruded into the tapped through hole of corresponding spring base and against the tapped through hole
Interior adjusting screw.By the adjusting screw in rotation tapped through hole, we are convenient to the preload elastic force of adjustment governor spring.
Embodiment 2: good buffering effect when in order to realize safe clamp brake, as shown in figure 4, we can make driven shaft with
Sleeve shaped is overlapped into rotation connection, is fixedly connected with a limit sleeve 11 on the rack, driven shaft is protruded into far from one end of driving shaft
In limit sleeve, and gap is formed between driven shaft and limit sleeve, the part that driven shaft protrudes into limit sleeve is arranged a braking volume
Spring 8, the one end for braking wind spring are fixedly connected with overlap joint sleeve, and the other end for braking wind spring is fixedly connected with driven shaft, the braking
Wind spring constitutes damping spring, to make that resilient engagement can be formed between driving shaft and driven shaft.Remaining structure and embodiment 1
It is identical, it is not described herein.
When car speeding lifting, pulley is engaged with overlap joint sleeve, overlaps sleeve rotation to drive, at this time lap joint sleeve
Cylinder drives driven shaft rotation by braking wind spring, and driven shaft can then drive safety tongs movement by corresponding transmission mechanism, in turn
Start the braking to car guide rail.When pulley, which continues through braking wind spring, flexibly driven shaft is driven to rotate, due to driven shaft
It can not rotate at this time, therefore, be formed and relatively rotated between pulley and driven shaft, braking wind spring is gradually tightened or is gradually loosened,
Correspondingly, the torque that pulley passes to driven shaft by braking wind spring is gradually increased, and correspondingly driven shaft passes to safety tongs
Active force is gradually increased, and then is gradually increased braking friction caused by safety tongs, at this time shape between pulley and wirerope
At static friction.When braking wind spring is finally tightly around on driven shaft or when being tightly attached on the inner sidewall of limit sleeve, pulley can not phase
Driven shaft is continued to rotate, forms dynamic friction between wirerope and pulley, pulley at this time passes through driven axial safety tongs output
Maximum torque, safety tongs reach maximum to the braking friction of car guide rail.
Claims (6)
1. a kind of towed elevator emergency braking limiter of speed, including rack, be arranged on the rack and and traction carriage wirerope
Associated driving shaft, characterized in that the driven shaft coaxial with driving shaft is additionally provided in rack, between driven shaft and driving shaft
Equipped with centrifugal clutching structure, limit sleeve is fixedly connected in the rack, the limit is protruded into one end of the driven shaft
In set, and the part for protruding on the driven shaft limit sleeve is arranged with the braking wind spring for limiting driven shaft rotation, works as master
When the revolving speed of moving axis is lower than rated speed, centrifugal clutching structure makes driving shaft, driven shaft be in discrete state；When driving shaft
When revolving speed is more than or equal to rated speed, centrifugal clutching structure engages driving shaft with driven shaft, and driving shaft drives driven shaft to turn
It is dynamic；When driven shaft rotates forward, braking wind spring is gradually tightly around on driven shaft, until driven shaft stops operating；Work as driven shaft
When rotating backward, braking wind spring is gradually discharged and is tightly attached on limit sleeve inner sidewall, until driven shaft stops operating.
2. a kind of towed elevator emergency braking limiter of speed according to claim 1, characterized in that set on the driving shaft
There is pulley, the wirerope for drawing carriage is wound around the pulley, and the centrifugal clutching structure includes governor spring, can
The limited block for getting rid of hammer and spring base, being connected with driven shaft of face of pulley is set with radially sliding, is getting rid of hammer and spring base
Between be equipped with articulated linkage, the governor spring makes spring base be located remotely from the initial position of driving shaft, and spring base passes through hinged
Connecting rod makes to get rid of hammer in the initial position close to driving shaft, and driving shaft, driven shaft at this time is in discrete state；When driving shaft
When revolving speed is more than or equal to rated speed, centrifugal force makes to get rid of hammer radial outward movement to the final position far from driving shaft, gets rid of hammer and passes through hinge
Connective pole makes spring base diameter move inward to the final position close to driving shaft, gets rid of the outer end of hammer against limited block, driven shaft i.e. with
It is rotated together with driving shaft.
3. a kind of towed elevator emergency braking limiter of speed according to claim 2, characterized in that the quantity for getting rid of hammer
It is 2, and is symmetricly set on the two sides of driving shaft；The quantity of the spring base is 2, and is symmetricly set on the two of driving shaft
Side is got rid of hammer and spring base around driving shaft in cross distribution, is each got rid of hinged described in being respectively equipped between hammer and 2 spring bases
Connecting rod, 4 hinged diamondwises of articulated linkage are respectively equipped with the governor spring, the tune between spring base and driving shaft
Fast spring one end compresses spring base, and the other end compresses driving shaft.
4. a kind of towed elevator emergency braking limiter of speed according to claim 3, characterized in that the hammer that gets rid of is far from main
The two sides of the outer end of moving axis are the first inclined-plane, so that the outer end for getting rid of hammer is made to form swallow-tailed bond end big outside and small inside, it is described
Driven shaft close to driving shaft one end be equipped with overlap joint sleeve, it is described overlap joint sleeve inner sidewall on be equipped with 4 described in limited block,
The two sides of the limited block are the second inclined-plane being adapted to first inclined-plane, to make limited block in dovetail shaped.
5. a kind of towed elevator emergency braking limiter of speed according to claim 2, characterized in that the rack is close
It is equipped with electromagnet at one end on driving shaft far from driven shaft, sliding jack is equipped in driving shaft, is equipped in the sliding jack
By the armature column of the solenoid actuated, the end that the armature column protrudes into sliding jack is equipped with the extrusion head of cone, institute
It states driving shaft and is equipped with radial squeezing through-hole, the inner end for getting rid of the close driving shaft of hammer, which is equipped with, fits in squeezing in squeezing through-hole
Section is pressed, the end of extruded segment, which is equipped with, squeezes inclined-plane, when solenoid actuated armature column is moved to application position, armature column extrusion head
Circular conical surface recline and squeeze inclined-plane, be moved outwards to make to get rid of hammer to final position.
6. a kind of towed elevator emergency braking limiter of speed according to claim 3, characterized in that on the spring base with
Governor spring corresponding position is equipped with tapped through hole, is equipped in tapped through hole and adjusts screw, on driving shaft with governor spring corresponding position
Equipped with spring positioning slot, one end of the governor spring is positioned on driving shaft in corresponding spring positioning slot, governor spring
The other end protrudes into the tapped through hole of corresponding spring base and against the adjusting screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810410881.2A CN110436296A (en) | 2018-05-02 | 2018-05-02 | A kind of towed elevator emergency braking limiter of speed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810410881.2A CN110436296A (en) | 2018-05-02 | 2018-05-02 | A kind of towed elevator emergency braking limiter of speed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110436296A true CN110436296A (en) | 2019-11-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810410881.2A Pending CN110436296A (en) | 2018-05-02 | 2018-05-02 | A kind of towed elevator emergency braking limiter of speed |
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| CN (1) | CN110436296A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111731978A (en) * | 2020-07-01 | 2020-10-02 | 浙江科技学院 | Novel speed limiter with uniform loading and vibration reduction protection functions and working method thereof |
-
2018
- 2018-05-02 CN CN201810410881.2A patent/CN110436296A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111731978A (en) * | 2020-07-01 | 2020-10-02 | 浙江科技学院 | Novel speed limiter with uniform loading and vibration reduction protection functions and working method thereof |
| CN111731978B (en) * | 2020-07-01 | 2022-01-28 | 浙江科技学院 | Novel speed limiter with uniform loading and vibration reduction protection functions and working method thereof |
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