CN201176347Y

CN201176347Y - Novel speed limiter of elevator

Info

Publication number: CN201176347Y
Application number: CNU2008200846655U
Authority: CN
Inventors: 左永民; 励海云
Original assignee: NINGBO SHENLING LIFT ACCESSORIES CO Ltd
Current assignee: NINGBO SHENLING LIFT ACCESSORIES CO Ltd
Priority date: 2008-04-08
Filing date: 2008-04-08
Publication date: 2009-01-07
Anticipated expiration: 2018-04-08

Abstract

A novel elevator over-speed governor is applied on the protection of the ascending over-speed or descending over-speed or the double direction over-speed of an elevator, which comprises a frame, a rope pulley and a rope pulley shaft, and further comprises an over-speed switch and a roller-type overrunning clutch, wherein the roller-type overrunning clutch is formed by a friction pair which is formed by a group of an internal and an external friction wheels which are axially installed with the rope pulley and a friction roller between the internal and the external wheels, and a centrifugal quadrangle component group, wherein the centrifugal quadrangle component group is formed by two centrifugal sheets, two balance springs and two connecting bars. The utility model adopts the roller-type overrunning clutch to replace a tradition centrifugal ratchet wheel type clutch structure, solves the uncontinuity and instability of the motion of the over-speed governor and the time delay property of the motion of an electrical switching, leads the elevator over-speed governor to immediately move when in over-speed, realizes the continuous speed catching of the over-speed governor, stabilizes the drawing force of a wire rope and the rope pulley, and keeps the operation of the elevator more safe and reliable.

Description

Novel elevator governor

Technical field

The utility model relates to and is used for ascending for elevator hypervelocity or descending hypervelocity or the detection of up-down bidirectional hypervelocity fault and the technical field of safety devices of correction, specifically relates to a kind of elevator speed governor.

Background technology

The elevator overspeed protecting device that uses all is to drive the brake device for elevator action by velocity limiter at present, makes the deceleration of elevator stop; Existing elevator governor is to adopt centrifugal ratchet-type clutch structure as shown in Figure 1, and steel wire penetrating rope sheave, ratchet are installed on the rope sheave outside, and the ratchet that matches with ratchet is hinged on the rope sheave, and ratchet also connects with centrifugal hammer; When elevator overspeed, the centrifugal hammer of elevator governor moves under action of centrifugal force, and ratchet blocks ratchet, makes the governor sheave braking; Rope press device in the elevator overspeed protecting device is pushed down steel rope simultaneously, drives the brake device for elevator action by the steel rope friction force; This technical scheme remains in following defective:

1) the governor tripping speed discountinuity of catching: this structure adopts ratchet that circumference is carried out calibration, because the time-delay of index pawl, causes the discountinuity of action, and this kind discountinuity makes the elevator brake time expand when elevator operation hypervelocity;

2) time delay of electric switch action: because the electric switch action is to impact re-packing of electric switch by the bolt on the centrifugal hammer to finish electric triggering, and for single-point triggers, i.e. motion capture that can only be once in a circumference makes the electric switch action delay;

3) lift the fugitiveness of power: because the power of lifting is participating in directly and finishing by governor sheave after rope press device is pushed down steel rope, rope sheave race in this mechanism can produce under the wearing and tearing of rope press device that the power of lifting jumps or the situation of bust, make to lift the power instability, velocity limiter itself is caused adverse influence.

Summary of the invention

The purpose of this utility model is to overcome the deficiency of above-mentioned prior art, a kind of elevator governor of novelty is provided, centrifugal ratchet-type clutch structure that need not be traditional, with the time delay that discountinuity, fugitiveness and the electric switch of avoiding the velocity limiter action moves, make the elevator operation safer reliable.

For achieving the above object, the technical solution adopted in the utility model is: a kind of elevator governor of novelty comprises frame, rope sheave, sheave shaft, overspeed switch, roller-type overrunning clutch; Said rope sheave is installed on the frame by sheave shaft, adorns steel rope on the rope sheave; Said overspeed switch is installed on the frame, and this overspeed switch has re-packing of can contacting with roller-type overrunning clutch, and when elevator overspeed, roller-type overrunning clutch impacts re-packing of overspeed switch under action of centrifugal force, triggers the electric switch action; Friction pair and centrifugal quadrangle member group that described roller-type overrunning clutch is made up of the friction roller between a group and coaxial mounted inside and outside friction wheel of rope sheave and inside and outside friction wheel constitute, and wherein have a friction wheel (internal friction wheel or external friction wheel) to fix with rope sheave or are one; Said centrifugal quadrangle member group by two be hinged on the centrifugal film on the rope sheave, two balance springs are formed with two connecting rods that are connected two centrifugal films respectively, every balance spring one end is fixed on the rope sheave, the other end is connected with connecting rod; Said centrifugal film is circular arc, and two centrifugal films are symmetrical in the rope sheave spoke along the rope sheave circumference respectively and arrange, and envelope most of profile of whole rope sheave periphery; Said inside and outside friction wheel socket, it is scarce that wherein internal friction wheel periphery symmetry has two webge slots, in these two webge slots lack friction roller is installed respectively, and the friction roll wheel shaft fixes with a connecting rod separately.

Its course of action is such: when elevator overspeed, centrifugal quadrangle member group expands outwardly under action of centrifugal force, and centrifugal film impacts overspeed switch and re-packs, and finishes electric switch and triggers; Simultaneously, the friction roller that connects with centrifugal quadrangle member group is under action of centrifugal force, lack the wedging direction to webge slot and move, with inside and outside friction wheel wedging, when elevator overspeed arrives to a certain degree, the friction roller wedging puts in place, internal friction wheel, external friction are taken turns with friction roller and are produced friction, stop rope sheave further to move, and the friction between steel rope and the rope sheave at this moment produces the steel rope tensile force, promptly produce pulling capacity, make the final stop elevator of brake equipment.

Owing to adopted technique scheme, the elevator governor of a kind of novelty of the present utility model, with roller-type overrunning clutch, and centrifugal ratchet-type clutch structure that need not be traditional, solve the time delay of discountinuity, fugitiveness and the electric switch action of velocity limiter action, made elevator governor snap action when elevator overspeed, realized velocity limiter speed continuous capturing, make the pulling capacity of steel rope and rope sheave stable, the elevator operation is safer reliable.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further described.

Fig. 1 is the elevator governor scheme drawing of background technology.

Fig. 2 is a structural representation of the present utility model.

Fig. 3 is the birds-eye view of Fig. 2.

Fig. 4 is the A-A view of Fig. 3.

Fig. 5 is the B-B cutaway view of Fig. 4.

Among the figure: 1, rope sheave, 2, ratchet, 3, ratchet, 4, centrifugal hammer, 5, rope press device, 6, frame, 7, overspeed switch, 701, re-pack, 8, safe jaw type clamping device, 9, sheave shaft, 10, the external friction wheel, 11, the internal friction wheel, 12, webge slot lacks, and 13, connecting rod, 14, centrifugal film, 15, friction roller, 16, balance spring, 17, spring bearing, 18, frizzen, 19, lifting rod, 20, manual initiating device.

The specific embodiment

By shown in Figure 1, existing elevator governor is to adopt centrifugal ratchet-type clutch structure, and steel wire penetrating rope sheave 1, ratchet 2 are installed on the rope sheave outside, and the ratchet 3 that matches with ratchet 2 is hinged on the rope sheave, and ratchet also connects with centrifugal hammer 4; When elevator overspeed, the centrifugal hammer 4 of elevator governor moves under action of centrifugal force, and ratchet 2 blocks ratchet 3, makes governor sheave 1 braking; Rope press device 5 in the elevator overspeed protecting device is pushed down steel rope simultaneously, drives the brake device for elevator action by the steel rope friction force.

Embodiment 1

By Fig. 2-shown in Figure 5, the elevator governor of a kind of novelty of the present utility model comprises frame 6, rope sheave 1, sheave shaft 9, overspeed switch 7, roller-type overrunning clutch; Said rope sheave 1 is installed on the frame 6 by sheave shaft 9, adorns steel rope on the rope sheave 1; Said overspeed switch 7 is installed on the frame 6, this overspeed switch 7 have one can contact with roller-type overrunning clutch re-pack 701, when elevator overspeed, roller-type overrunning clutch impacts re-packing of overspeed switch under action of centrifugal force, triggers the electric switch action; Friction pair and centrifugal quadrangle member group that described roller-type overrunning clutch is made up of the friction roller 15 between a group and coaxial mounted inside and outside friction wheel 11,10 of rope sheave and inside and outside friction wheel constitute; Said inside and outside friction wheel socket, wherein internal friction wheel 11 is fixing with rope sheave 1, and external friction wheel 10 is fixing with frame 6; Said centrifugal quadrangle member group by two be hinged on the centrifugal film 14 on the rope sheave, two balance springs 16 are formed with two connecting rods 13 that are connected two centrifugal films respectively, every balance spring 16 1 ends are fixed on the rope sheave 1, the other end is connected with connecting rod 13; Said centrifugal film 14 is circular arc, and two centrifugal films are symmetrical in the rope sheave spoke along rope sheave 1 circumference respectively and arrange, and envelope most of profile of whole rope sheave periphery; Said internal friction is taken turns 11 periphery symmetries and is had two webge slots and lack 12, in these two webge slots lack friction roller 15 is installed respectively, and the friction roll axis of a cylinder fixes with a connecting rod separately;

Also can on said sheave shaft 9, set up manual initiating device 20, centrifugal quadrangle member group be expanded outwardly by the manual triggers mode.

Embodiment 2

In embodiment 1, change external friction wheel 10 and be fixed as external friction wheel 10 and sheave shaft flush fit with frame 6, all the other repeat embodiment 1.

Embodiment 3

In embodiment 1, change internal friction wheel 11 is fixed with rope sheave 1 with the external friction wheel 10 that is fixed as of rope sheave 1, and the external friction wheel is fixing with frame 6; Internal friction wheel 11 then changes into frame 6 fixing, and all the other repeat embodiment 1.

Embodiment 4

In embodiment 3, change internal friction wheel 11 and be fixed as internal friction wheel 11 and sheave shaft flush fit with frame 6, all the other repeat embodiment 3.

Embodiment 5

In embodiment 2 or 4, external friction is taken turns and is also had groove on 10 wheel rims and lack; For adapting to the speed limit of express elevator, the utility model also includes safe jaw type clamping device 8, and this safe jaw type clamping device 8 is installed on the frame 6, and steel rope passes through from safety jaw type clamping device, safe jaw type clamping device connects lifting rod 19, by the hinged frizzen 18 of lifting rod; These frizzen 18 tops contact connection with the external friction wheel rim; Frizzen 18 also connects the triggering spring, and frizzen 18 tops contact connection with the external friction wheel rim; Frizzen 18 also connects the triggering spring, and frizzen and triggering spring all place on the spring bearing 17, and spring bearing and frame 6 fix; When express elevator exceeded the speed limit, friction roller 15 displacements put in place, made the internal friction wheel 11 of rotation and static external friction take turns 10 wedgings and became one, and stoped rope sheave further to move; Driving external friction wheel 10 and rope sheave 1 simultaneously rotates together; After the external friction wheel turns over certain angle, groove on the frizzen 18 tops contact external friction wheel rim lacks, and frizzen is triggering the action of the spring bottom offset, makes lifting rod 19 actions, drive safe jaw type clamping device 8 and clamp steel rope, make the final stop elevator of brake equipment.

Claims

1, a kind of elevator governor of novelty comprises frame (6), rope sheave (1), sheave shaft (9); Said rope sheave (1) is installed on the frame (6) by sheave shaft (9), and rope sheave (1) is gone up the dress steel rope; It is characterized in that: also comprise overspeed switch (7) and roller-type overrunning clutch; Said overspeed switch (7) is installed on the frame (6), and this overspeed switch (7) has one re-pack (701) that can contact with roller-type overrunning clutch; Friction pair and centrifugal quadrangle member group that described roller-type overrunning clutch is made up of the friction roller (15) between a group and coaxial mounted inside and outside friction wheel of rope sheave (1) (11,10) and inside and outside friction wheel constitute; Said inside and outside friction wheel socket, wherein internal friction wheel (11) periphery symmetry has two webge slots scarce (12), in these two webge slots lack friction roller (15) is installed respectively; Two connecting rods (13) that said centrifugal quadrangle member group is hinged on centrifugal film (14), two balance springs (16) on the rope sheave by two and is connected two centrifugal films are respectively formed, every balance spring (16) one ends are fixed on the rope sheave (1), and the other end is connected with connecting rod (13); Said centrifugal film (14) is circular arc, and two centrifugal films are symmetrical in the rope sheave spoke along rope sheave (1) circumference respectively and arrange, and envelope most of profile of whole rope sheave periphery; Said friction roll axis of a cylinder fixes with a connecting rod separately.

2, the elevator governor of a kind of novelty according to claim 1 is characterized in that: said external friction wheel (10) is fixing with rope sheave (1), and internal friction wheel (11) is fixing with frame (6).

3, the elevator governor of a kind of novelty according to claim 1 is characterized in that: said internal friction wheel (11) is fixing with rope sheave (1), and external friction wheel (10) is fixing with frame (6).

4, the elevator governor of a kind of novelty according to claim 1 is characterized in that: said external friction wheel (10) is fixing with rope sheave (1), internal friction wheel (11) and sheave shaft flush fit.

5, the elevator governor of a kind of novelty according to claim 1 is characterized in that: said internal friction wheel (11) is fixing with rope sheave (1), external friction wheel (10) and sheave shaft flush fit.

6, according to the elevator governor of claim 4 or 5 described a kind of novelties, it is characterized in that: also include safe jaw type clamping device (8), this safe jaw type clamping device (8) is installed on the frame (6), steel rope passes through from safety jaw type clamping device, safe jaw type clamping device connects lifting rod (19), by the hinged frizzen of lifting rod (18); This frizzen (18) top contacts connection with external friction wheel (10) wheel rim; Having groove on the said external friction wheel rim lacks; Frizzen (18) also connects the triggering spring, and frizzen and triggering spring all place on the spring bearing (17), and spring bearing and frame (6) fix.

7, the elevator governor of a kind of novelty according to claim 1 is characterized in that: also be provided with manual initiating device (20) on said sheave shaft (9).