CN201351069Y

CN201351069Y - Anti-dropping Safety speed limiter

Info

Publication number: CN201351069Y
Application number: CNU2009200105794U
Authority: CN
Inventors: 华宏烨
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-02-16
Filing date: 2009-02-16
Publication date: 2009-11-25
Anticipated expiration: 2019-02-16

Abstract

The utility model provides an anti-dropping safety speed limiter which comprises a shell connected with a speed reducer and a mainshaft arranged in the shell and inserted into speed reducer. The anti-dropping safety speed limiter is characterized in that a flying shaft is fixed in a direction perpendicular to the axis of the mainshaft, the end portion of the flying shaft is movably provided with a friction wafer, one end of a spring arranged on the flying shaft is fixed on the flying shaft, and the other end thereof is fixed on the friction wafer, when in use, the friction wafer is leaned against and contacted with the inner wall of the shell, a curved hand handle is movably arranged on the shell, one end of the curved hand handle extends into the shell and is connected with a sliding sleeve which is capable of moving along the axial direction of the mainshaft, the sliding sleeve can temporarily push the friction out of the inner wall of the shell. The anti-dropping safety speed limiter has simple and reasonable structure, low cost and convenient manipulation and can provide a safety barrier to the construction industry of our country.

Description

Anti-fall safety speed-limit device

Technical field:

The utility model relates to a kind of safety device that is applied on the elevator, relates in particular to a kind of anti-fall safety speed-limit device.

Background technology:

Current our employed building hoist is to drive cage by the electric motor drive reductor to rise or descend.And the working process of building hoist is that the meeting appearance is unusual, and this will cause danger to the workmen, and for example when running into power failure, elevator craning cage will be stuck in the air, makes the workmen stranded.Existing elevator craning cage all is furnished with anti-falling safety device, and the effect of this anti-falling safety device is when cage occurs that situation falls when unusual, limit the speed of whereabouts, and the cage that only falls is when reaching its design speed, just can force to hold firmly, prevent falling of elevator and cage, reach anti-fall purpose, the control rate of its setting is to meet or exceed 72m/min; And when elevator craning cage is stuck in midair, at this moment, will open the rim brake releaser of elevator craning cage, elevator craning cage is fallen with the state that is similar to free-falling body, and have only when speed meets or exceeds 72m/min, preventing sewing safety just can be with the elevator craning cage locking, to guarantee workmen's safety, and such dropping process is a danger close, and this anti-falling safety device can't be controlled the lapse rate of elevator reposefully, still can cause certain danger to the workmen, have very big potential safety hazard.

Summary of the invention:

The utility model purpose: the utility model provides a kind of anti-fall safety speed-limit device, its objective is that prominent chance of solution elevator craning cage in the past has a power failure or during other faults, and elevator is suspended from the duty or the dropping process instability causes the problem of workmen's danger.

Technical scheme: the utility model is achieved through the following technical solutions:

A kind of anti-fall safety speed-limit device comprises and reductor bonded assembly shell, is provided with in the enclosure and puts in the main shaft of reductor, it is characterized in that: on direction, be fixed with and fly axle perpendicular to main-shaft axis, fly axle the activity of end points place be provided with friction lining; Flying also to be provided with spring on the axle, an end of spring is fixed on and flies on the axle, and the other end is fixed on the friction lining; Friction lining contacts with the inwall of shell in use; Be movably set with curved handle on shell, an end of curved handle puts in the shell and can be connected along the axially movable sliding sleeve of main shaft, and sliding sleeve top that friction lining is provisional is from the inwall of shell.

Friction lining is two members that the outside is an arc; Also be with coupler outside main shaft, coupler is provided with baffle plate and support plate, the direction of support plate with fly the axle parallel, on support plate, also be provided with spring pin; Spring on the spring pin axially withstands sliding sleeve along main shaft, and sliding sleeve is near friction lining.

Advantage and effect: when meeting power failure for cage is dashed forward, the workmen can land safely, the utility model provides a kind of anti-fall safety speed-limit device, the anti-fall safety speed-limit device of this elevator mainly is to be provided with one to fly axle on original elevator main shaft, the outer end that flies axle is movably set with friction lining, that is to say that friction lining can move by reciprocal cover in the outer end that flies axle, fly axle and be provided with spring, one end of spring is fixed on and flies on the axle, the other end is fixed on the friction lining, be covered with at friction lining and be fixed on shell, shell is fixed on the reductor, and shell is provided with curved handle and puts in and withstand sliding sleeve in the shell, when withstanding like this, the effect of sliding sleeve is not only the friction lining and the inwall of shell are separated, simultaneously the velocity of rotation of restriction main shaft that also can be to a certain degree.The principle of work of this anti-fall safety speed-limit device is, when meeting power-off condition when dashing forward, open the rim brake releaser, elevator is fallen, and when speed met or exceeded 72m/min, anti-falling safety device just can be started working, the locking elevator, prevent to fall, but such dropping process danger coefficient is very big, original anti-falling safety device is the rhythm and the speed of pulsation-free control whereabouts effectively; And used after the utility model, curved handle of the present utility model is pulled, make its drive sliding sleeve leave Friction disk along the axial direction of main shaft, at this moment, because the rotation of main shaft no longer is restricted, friction lining also no longer is restricted; At this moment open original anti-falling safety device, itself and driving device are broken away from, open the rim brake releaser of elevator again, elevator is fallen, main shaft will rotate suddenly like this, at this moment because action of centrifugal force, friction lining by unexpected throw away and with the outer casing inner wall closed contact, under the effect of friction force, suppressed the velocity of rotation of main shaft like this, thereby, the speed of falling of elevator craning cage is slowed down greatly, when the speed of elevator craning cage slows to a certain degree, owing to reducing of centnifugal force, thereby under the effect of the spring on the main shaft, friction lining is pulled back to the state that leaves outer casing inner wall, and the speed of main shaft can be accelerated suddenly again then, like this, the inwall that friction lining is thrown out of once more with shell contacts, limited the rotative speed of main shaft once more, and these processes all be in the process that descends moment finish, therefore, this anti-fall safety speed-limit device can remain on the falling speed of elevator stable scope, and elevator and workmen's safety are landed.

The speed of the anti-fall safety speed-limit device that we are designed has greatly been considered people's safety factor well below the falling speed of original anti-falling safety device.

This anti-fall safety speed-limit device is simple and reasonable, with low cost, easy and simple to handle, and the building hoist industry that can be China provides a safety curtain.

Description of drawings:

Fig. 1 is an integral structure schematic top plan view of the present utility model;

Fig. 2 is for showing the local structure scheme drawing of the utility model main shaft and friction lining;

Fig. 3 shows the plan structure section-drawing of main shaft and friction lining for the utility model.

The specific embodiment:

Below in conjunction with accompanying drawing the utility model is done nearly step explanation:

The utility model provides a kind of anti-fall safety speed-limit device, as shown in Figure 1, comprises existing and reductor 12 bonded assembly shells 5, and be arranged in the shell 5 and put in the main shaft 1 of reductor, and anti-falling safety device; And the utility model is to be fixed with to fly axle 7 on the direction perpendicular to the axis of main shaft 1, and flying axle 7 can be along with main shaft 1 rotation freely in shell 5, also just says fly spools 7 inwalls that can not push up shell 5; What fly axle 7 end points place activity is with friction lining 4, and it is moving to that is to say that friction lining 4 can be made cover at the end points place that flies axle 7; Flying also to be provided with spring 3 on the axle 7, an end of spring 3 is fixed on and flies on the axle 7, and the other end is fixed on the friction lining 4; Friction lining 4 is withstood on the inwall of shell 5 by the rotary centrifugal force of main shaft 1 in use; On shell 5, be movably set with curved handle, curved handle puts in and withstands sliding sleeve 9 in the shell 5, sliding sleeve 9 withstands friction lining 4 separates friction lining 4 provisional inwall with shell 5 under obsolete situation, that is to say that when the normal rotation of main shaft 1 friction lining 4 is the inwall that can not run into shell 5 under the effect of sliding sleeve 9; Curved handle 8 can drive the axial direction slip of sliding sleeve 9 along main shaft 1, makes sliding sleeve 9 leave friction lining 4; The place, top of 9 pairs of friction linings 4 of sliding sleeve has also limited the rotative speed of main shaft 1 to a certain extent, but sliding sleeve 9 has only an effect of blocking friction lining 4, does not have too big top power, so the not too large rotation that influences main shaft 1.

The effect of friction lining 4 is, in use by with the friction of the inwall of shell 5 main shaft 1 being braked.The inner wall shape of the outer shape of friction lining 4 and shell 5 adapts, and for example: as shown in Figure 2, when the inwall of friction lining 4 was circular arc, the outer shape of friction lining 4 then was a circular arc, and friction lining 4 can be selected one or two; Also be with coupler 10 outside main shaft 1, coupler 10 is fixing, and main shaft 1 can rotate coupler 10 in, and coupler 10 is provided with baffle plate and support plate 11, the direction of support plate 11 with fly spools 7 parallelly, on support plate 11, also be provided with spring pin 10; Spring pin 10 is vertically set on the support plate 11, spring on the spring pin 10 withstands sliding sleeve 9, make sliding sleeve 9 near living friction lining 4 and blocking friction lining 4, sliding sleeve is just withstood from both direction by spring pin 9 and curved handle 8 respectively like this, the purpose of curved handle 8 is to withstand friction lining 4 by sliding sleeve 9, friction lining 4 is separated with the inwall of shell 5 when not using, and so-called friction lining 4 is exactly the time spent of doing that friction lining 4 does not play braking when not using; And the effect of spring pin 9 is when the effect of friction lining 4 braking finishes, and the elastic force by the spring on the spring pin 9 resets sliding sleeve 9, makes sliding sleeve 9 block friction lining 4 again, guarantees that friction lining 4 separates with shell 5 inwalls at glancing impact not.

In the process of elevator normal descend or rising, main shaft 1 can be with one slowly and pulsation-free speed is rotated, fly axle 7, fly axle on 7 spring and the friction lining 4 that flies axle 7 end points places rotate with main shaft, at this moment, under the effect of sliding sleeve 9, friction lining 4 is the normal rotations with assurance main shaft 1 that are in the state that separates with shell 5 inwalls; When running into the situation of unexpected power failure, whole elevator will locking, main shaft 1 also will stop operating, elevator and workmen just might be trapped in the air like this, if according to method in the past, open the rim brake releaser on the elevator exactly, the state that makes elevator be similar to free-falling body falls, have only when the speed that falls meets or exceeds 72m/min, original anti-falling safety device just can guarantee workmen's safety with the elevator locking, and such falling speed is to be difficult to control, for stranded workmen is danger close, has very big potential safety hazard; And working process and principle when using anti-fall safety speed-limit device of the present utility model are as follows: when elevator has a power failure, the elevator locking, at this moment, pull curved handle 8, the part that makes curved handle 8 put in shell 5 drive sliding sleeve 9 along the axial direction of main shaft A just shown in Figure 1 to, leave friction lining 4, like this, friction lining 4 has not just had the restriction of sliding sleeve 9, pull original anti-falling safety device then, itself and driving device are broken away from, be in off position, its objective is for the influence work of the present utility model that differs; At this moment, just need open the rim brake releaser on the elevator, make elevator begin to fall, main shaft 1 moment recovery is rotated, at this moment, friction lining 4 will be thrown out of under the effect of the rotary centrifugal force of main shaft 1, fully contact with the inwall of shell 5, like this under the effect of friction force between friction lining 4 and shell 5 inwalls, the rotative speed of main shaft will Be Controlled, when the speed of elevator craning cage slows to a certain degree, because the reducing of centnifugal force, thereby under the effect of the spring on the main shaft, friction lining is pulled back to the state that leaves outer casing inner wall, and the speed of main shaft can be accelerated suddenly again then, like this, the inwall that friction lining is thrown out of once more with shell contacts, limited the rotative speed of main shaft once more, and these processes all be in the process that descends moment finish, therefore, this anti-fall safety speed-limit device can remain on the falling speed of elevator stable scope, and elevator and workmen's safety are landed; And then assurance workmen's safety, after treating that elevator lands, main shaft 1 stops the rotation, friction lining 4 also loses centripetal force, like this under the effect that flies the spring 3 on the axle 7, friction lining 4 is pulled back to original position, be that friction lining 4 is from newly getting back to the state that separates with the inwall of shell 5, unclamp curved handle 8 then, like this under the effect of the spring on the spring pin 10, sliding sleeve is got back to original position by 9 towards the direction top of friction lining 4, friction lining 4 is blocked, thereby guarantee that friction lining 4 is not thrown out of when main shaft 1 normal the enforcement.

Claims

1, a kind of anti-fall safety speed-limit device, comprise and reductor (12) bonded assembly shell (5), be arranged in the shell (5) and put in the main shaft (1) of reductor, it is characterized in that: on direction, be fixed with and fly axle (7) perpendicular to main shaft (1) axis, fly axle (7) the activity of end points place be provided with friction lining (4); Flying also to be provided with spring (3) on the axle (7), an end of spring (3) is fixed on and flies on the axle (7), and the other end is fixed on the friction lining (4); Friction lining (4) contacts with the inwall of shell (5) in use; Be movably set with curved handle on shell (5), an end of curved handle puts in the shell (5) and can be connected along the axially movable sliding sleeve (9) of main shaft (1), and sliding sleeve (9) top that friction lining (4) is provisional is from the inwall of shell (5).

2, anti-fall safety speed-limit device according to claim 1 is characterized in that: friction lining (4) is two members that the outside is an arc; Also be with coupler outside main shaft (1), coupler is provided with baffle plate and support plate, the direction of support plate with fly the axle (7) parallel, on support plate, also be provided with spring pin (10); Spring on the spring pin (10) axially withstands sliding sleeve (9) along main shaft (1), and sliding sleeve (9) is near friction lining (4).