CN2477593Y

CN2477593Y - Two-way action speed limiter

Info

Publication number: CN2477593Y
Application number: CN 01224666
Authority: CN
Inventors: 王晓会; 贾砚华; 王秀华; 赵立萍
Original assignee: DONGFANG MACHINERY PLANT HEBEI
Current assignee: DONGFANG MACHINERY PLANT HEBEI
Priority date: 2001-05-25
Filing date: 2001-05-25
Publication date: 2002-02-20
Anticipated expiration: 2011-05-25

Abstract

A two-way action speed limiter has a descending speed limiting mechanism and an ascending speed limiting mechanism. An instant switch I 17 in the descending speed limiting mechanism is positioned just above the rope wheel 25, and is fixed at a switch bracket 19. A switch sheet pilling 43 is fixed on a sheet pilling part I 13. The ascending speed limiting mechanism has a ratchet wheel and pawl mechanism, a rope pressing mechanism and an instant switch II 27. The two-way action speed limiter of the utility model can send the electrical signal when the elevator is over-speed in the up-down operation, make the tractor power off, and generate the mechanical action, and arrange at the safe clamp of the cage by the operation, to make the elevator stop and keep the stationary state, and make the elevator operate safer.

Description

The bidirectional-movement velocity limiter

The utility model relates to a kind of velocity limiter, in elevator(lift) machine room, when ascending for elevator and descending above command speed and when elevator wire rope ruptures, can send electric signal and make the elevator traction tester in power-down state; And can produce mechanical action, and handle the safety tongs action that is installed on the car, make the elevator stopping of hypervelocity and keep quiescence.

The velocity limiter of existing domestic and international production mostly by support, rope sheave, sheave shaft, get rid of main parts size such as piece, pull bar, adjustment spring, single cover ratchet, ratchet, paw, single casing pressure rope parts and form, the centnifugal force that produces when utilizing rope sheave to rotate can make the elevator of hypervelocity send electric signal on descending and up both direction, but can only make the elevator of hypervelocity produce mechanical action when descending.Therefore, existing velocity limiter can only produce mechanical action when the descending hypervelocity of elevator, make the elevator stopping of hypervelocity and keep quiescence.

No matter the purpose of this utility model provides a kind of elevator all can send electric signal and produce mechanical action on descending or up both direction bidirectional-movement velocity limiter.

Bidirectional-movement velocity limiter described in the utility model has descending speed limiting mechanism and up speed limiting mechanism, snap switch I in the described descending speed limiting mechanism be positioned at rope sheave directly over, be fixed on the switch bracket, this switch bracket is fixed on the left socle, and switch re-packs and is fixed on the parts I that re-packs; Described up speed limiting mechanism has ratchet and pawl arrangement, presses rope mechanism and snap switch II.

In the described ratchet and pawl arrangement, ratchet II is installed on the sheave shaft, described ratchet II and centrifugal block for clutch use II are with the coaxial right side that is connected rope sheave of pawl axis II, described paw II is connected on the rope sheave with paw axle II, barb is at the head of ratchet II, holding screw roof pressure on it is on centrifugal block for clutch use II, among the described pressure rope II of mechanism, press rope support II to be connected on left socle and the right support with connecting bearing pin I, card rope plate II is connected on the pressure rope support II with connecting bearing pin II, parts II one end that re-packs is connected on the ratchet II with riveted joint bearing pin II, and the other end passes presses rope support II, and compression spring II is through on the screw rod of the parts II that re-packs, be equipped with tight with nut, switch hits plate and is connected on the parts II that re-packs, and snap switch II hits plate over against switch, is fixed on the right support.

It further improves is that described pressure rope support I is to be respectively arranged with set screw at the two ends of left socle and right support with pressing the adjusting that blocks rope plate I among the rope support II and block rope position, the plate II left and right sides.

Bidirectional-movement velocity limiter described in the utility model sends electric signal when elevator is exceeded the speed limit on make progress operation and downward operation both direction, make the elevator traction tester in power-down state, and can produce mechanical action, drive is installed on the safety tongs action on the car, make the elevator stopping of hypervelocity and keep quiescence, make elevator safety reliable.

Fig. 1 is the front view of bidirectional-movement velocity limiter described in the utility model;

Fig. 2 is the cutaway view of I-I line among Fig. 1;

Fig. 3 is the back view of described bidirectional-movement velocity limiter;

Fig. 4 is the section-drawing of II-II line among Fig. 1.

Bidirectional-movement velocity limiter described in the utility model comprises descending speed limiting mechanism and up speed limiting mechanism, and descending speed limiting mechanism has been prior art, and basis is novel have been done partly to improve to it.For the clear understanding of integral body, at first, bidirectional-movement velocity limiter integral body described in the utility model is described, and then outstanding the utility model is to the prior art improvements to bidirectional-movement velocity limiter described in the utility model.See Fig. 1 to Fig. 4, left socle 33 and right support 35 are fixed by bolts on the base plate 1, and the integral piece that is connected to form by sheave shaft 37 and rope sheave 25 interference is connected on left socle 33 and the right support 35 by antifriction-bearing box 36.Ratchet I39 is installed on the sheave shaft 37 by antifriction-bearing box 38.Blocking rope plate I8 is connected to pressure rope support I12 and presses on the rope support II24 by being connected bearing pin II10 with card rope plate II47.Press rope support I12 and pressure rope support II24 by being connected bearing pin I7 and being connected bearing pin II52 and being connected on left socle 33 and the right support 35.Two ends at left socle 33 and right support 35 are fastened with set

screw

6 and 53 respectively, described set

screw

6 and 53, respectively with press rope support I12 and press rope support II24 about two lateral surfaces contact location, press in the rope support card rope plate I8 and block the position, the plate II47 left and right sides of restricting to regulate.

Set screw

6 and 53 is equipped with tight by nut.Parts I13 one end that re-packs passes presses rope support I12, and the other end is fixedly connected on the ratchet I39 with riveted joint bearing pin II20; Compression spring I14 and compression spring II49 are installed in respectively on the screw rod of re-pack the parts I13 and the parts II23 that re-packs, and are equipped with tight with nut.Screw with square head 11 is connected on the centrifugal block for clutch use I9, and is equipped with tight with nut.Needle bearing 40 is fitted in the rope sheave 25.Ratchet I42 and centrifugal block for clutch use I9 are connected to the left side and the right side of rope sheave 25 with pawl axis I18, and are equipped with tight with nut; Paw I45 is connected on the rope sheave 25 with paw axle I44, and roof pressure is at the afterbody of ratchet I42, and with the collar chucking, tightening screw 46 roof pressures on it are on centrifugal block for clutch use I9.Torsion spring I41 is sleeved on the paw I45, and the one end is pressed on the paw I45, and the other end is fixed on the rope sheave 25.Torsion spring II34 is sleeved on the paw II31, and the one end is pressed on the paw II31, and the other end is fixed on the rope sheave 25.Extension spring I28 and extension spring II51 an end respectively are fixed on the rope sheave 25, and the other end is fixed on ratchet I42 and the ratchet II29.Two alignment pin 5 one ends are separately fixed on left socle 33 and the right support 35, and the other end is through respectively in the slotted hole of ratchet II4 and ratchet I39.Two riveted joints of connecting rod 3 usefulness bearing pin I15, one end is connected on the centrifugal block for clutch use I9, and the other end is connected on the centrifugal block for clutch use II2.Bolt 21 1 ends are through in the circular hole of rope sheave 25, and the other end is connected on the centrifugal block for clutch use I9.Adjust spring 26 and be through on the bolt 21, and be equipped with tight with nut.

The utility model is to the improvement of existing descending action velocity limiter, be be connected the snap switch I17 of switch screw 16 be positioned at rope sheave 25 directly over, be fixed on the switch bracket 19, switch bracket 19 is fixed on the left socle 33, and switch re-packs and 43 is fixed on the parts I13 that re-packs.

For the sake of clarity, concentrate proposition to be described at this up speed limiting mechanism that will increase.Up speed limiting mechanism described in the utility model is to have increased by a cover ratchet and pawl arrangement on existing descending velocity limiter, press rope mechanism and snap switch II27, in the described ratchet and pawl arrangement, ratchet II4 is installed on the sheave shaft 37 with antifriction-bearing box 38, described ratchet II29 and centrifugal block for clutch use II2 are with the coaxial right side that is connected rope sheave 25 of pawl axis II30, paw II31 is connected on the rope sheave 25 with paw axle II32, barb is at the head of ratchet II29, and tighten with collar, holding screw 54 roof pressures on it are on centrifugal block for clutch use II2, torsion spring II34 is sleeved on the paw II31, and the one end is pressed on the paw II31, and the other end is fixed on the rope sheave 25.In the described pressure rope mechanism, press rope support II24 to be fixedly connected on left socle 33 and the right support 35 with connecting bearing pin II52, card rope plate II47 is connected on the pressure rope support II24 with connecting bearing pin II48, parts II23 one end that re-packs is connected on the ratchet II4 with riveted joint bearing pin II50, the other end passes presses rope support II24, compression spring II49 is through on the screw rod of the parts II23 that re-packs, and be equipped with tight with nut, switch hits plate 22 usefulness bolts and connects firmly on the parts II23 that re-packs, snap switch II27 hits plate over against switch, is fixed on the right support 35.

The working process of bidirectional-movement velocity limiter described in the utility model is as follows:

When elevator moves [being that rope sheave 25 shown in Figure 1 clockwise rotates] with command speed downwards, the centrifugal block for clutch use I9 and the centrifugal block for clutch use II2 that are connected on rope sheave 25 and the connecting rod 3 are issued to dynamical equilibrium in centnifugal force and the spring force effect of adjusting spring 26, and this moment, velocity limiter was in normal working.When elevator when downwards operation surpasses command speed, the suffered centnifugal force of centrifugal block for clutch use I9 and centrifugal block for clutch use II2 becomes big, and makes the distance in center of gravity and sheave shaft 37 axle center of centrifugal block for clutch use I9 and centrifugal block for clutch use II2 become greatly; At this moment, be connected screw with square head 11 on the centrifugal block for clutch use I9 and make snap switch I17 action outage, and send electric signal and make elevator traction machine shut down.If the elevator speed of operation downwards further strengthens, the suffered centnifugal force of centrifugal block for clutch use I9 and centrifugal block for clutch use II2 further becomes big, and further strengthen the center of gravity of centrifugal block for clutch use I9 and centrifugal block for clutch use II2 and the distance in sheave shaft 37 axle center, at this moment centrifugal block for clutch use I9 promotes to connect firmly holding screw 46 on paw I45 and makes paw I45 overcome the torsion that torsion spring I41 produces and throw off with ratchet I42; The ratchet I42 that throws off cw under the effect of extension spring I28 turns round and meshes with ratchet I39, makes ratchet I39 and rope sheave 25 synchronous cws runnings; Being connected the parts I13 that re-packs on the ratchet I39 then drives connected pressure rope support I12 and clockwise rotates in the same way around connecting bearing pin I7; Also clockwise rotate and oppress steel rope on the rope sheave 25 with pressing rope support I12 with being connected bearing pin II10 bonded assembly card rope plate I8; The switch on the parts I13 of the re-packing 43 switch screws 16 that clash into again on the snap switch I17 that re-pack make snap switch I17 action outage.When rope sheave 25 and slotted hole on the ratchet I39 run to be connected in left socle 33 on alignment pin 5 when contacting, governor sheave 25 shuts down.At this moment, compression spring I14 produces by compression makes every effort to promote and makes card rope plate I8 block the steel rope on the rope sheave 25 and produce the power of lifting, and drives the safety tongs that is installed on the car to move, and makes the elevator stopping of descending hypervelocity and keeps quiescence.

In like manner, when elevator upwards moves [being that rope sheave 25 shown in Figure 1 rotates counterclockwise] with command speed, the centrifugal block for clutch use I9 and the centrifugal block for clutch use II2 that are connected on rope sheave 25 and the connecting rod 3 are issued to dynamical equilibrium in centnifugal force and the spring force effect of adjusting spring 26, and this moment, velocity limiter was in normal working.When elevator when upwards operation surpasses command speed, the suffered centnifugal force of centrifugal block for clutch use I9 and centrifugal block for clutch use II2 becomes big, and makes the distance in center of gravity and sheave shaft 37 axle center of centrifugal block for clutch use I9 and centrifugal block for clutch use II2 become greatly; At this moment, the screw with square head 11 that is connected centrifugal block for clutch use I9 makes snap switch I17 action outage, and sends electric signal and make elevator traction machine shut down.If the elevator upwards speed of operation further strengthens, centrifugal with piece I9 and suffered further the change greatly of centnifugal force of centrifugal block for clutch use II2, and further strengthen the center of gravity of centrifugal block for clutch use I9 and centrifugal block for clutch use II2 and the distance in sheave shaft 37 axle center, at this moment centrifugal block for clutch use II2 promotes to connect firmly the holding screw 54 on paw II31, makes paw II31 overcome the torsion that torsion spring II34 produces and throws off with ratchet II29; The ratchet II29 that throws off conter clockwise under the effect of extension spring II51 turns round and meshes with ratchet II4, makes ratchet II4 and rope sheave 25 synchronous conter clockwises runnings; Being connected the parts II23 that re-packs on the ratchet II4 then drives connected pressure rope support II24 and rotates counterclockwise in the same way around connecting bearing pin I52; Also rotate counterclockwise and oppress steel rope on the rope sheave 25 with pressing rope support II24 with being connected bearing pin II48 bonded assembly card rope plate II47; The switch that re-packs on the parts II23 hits plate 22 bump snap switch II27, makes snap switch II27 action outage.When rope sheave 25 and slotted hole on the ratchet II4 run to be connected in right support 35 on alignment pin 5 when contacting, governor sheave 25 shuts down.At this moment, compression spring II49 produces by compression makes every effort to promote and makes card rope plate II47 block the steel rope on the rope sheave 25 and produce the power of lifting, and drives the safety tongs that is installed on the car to move, and makes the elevator stopping of up hypervelocity and keeps quiescence.

After the velocity limiter action, snap switch I17 and snap switch II27 must be returned to original position (being that switch is in "on" position); Lift ratchet I42 and ratchet II29; Paw I45 is pressed on the ratchet I42, and paw II31 is hooked on the ratchet II29; When governor sheave 25 can freely turn round on conter clockwise and cw both direction, the utility model bidirectional-movement velocity limiter just can return to normal working, and elevator could recover to use.

Claims

1, the bidirectional-movement velocity limiter, has descending speed limiting mechanism, it is characterized in that snap switch I (17) in the described descending speed limiting mechanism be positioned at rope sheave (25) directly over, be fixed on the switch bracket (19), switch bracket (19) is fixed on the left socle (33), switch re-pack (43) be fixed on the parts I (13) that re-packs, also have up speed limiting mechanism, described up speed limiting mechanism has ratchet and pawl arrangement, presses rope mechanism and snap switch II (27).

2, bidirectional-movement velocity limiter according to claim 1, it is characterized in that in the described ratchet and pawl arrangement, ratchet II (4) is installed on the sheave shaft (37), described ratchet II (29) and centrifugal block for clutch use II (2) are with the coaxial right side that is connected rope sheave (25) of pawl axis II (30), described paw II (31) is connected on the rope sheave 25 with paw axle II32, barb is at the head of ratchet II (29), holding screw on it (54) roof pressure is on centrifugal block for clutch use II (2), in the described pressure rope mechanism, press rope support II (24) to be fixedly connected on left socle (33) and the right support (35) with connecting bearing pin II (52), card rope plate II (47) is connected on the pressure rope support II (24) with connecting bearing pin II (48), parts II (23) one ends that re-pack are connected on the ratchet II (4) with riveted joint bearing pin II (50), the other end passes presses rope support II (24), compression spring II (49) is through on the screw rod of parts II (23) that re-pack, and be equipped with tight with nut, switch hits plate (22) and is connected on the parts II (23) that re-packs, snap switch II (27) hits plate (22) over against switch, is fixed on the right support (35).

3, bidirectional-movement velocity limiter according to claim 1 and 2, it is characterized in that described pressure rope support I (12) and pressing the adjusting that blocks rope plate I (8) and card rope plate II (47) position, the left and right sides among the rope support II (24) is to be respectively arranged with set screw (6) and (53) at the two ends of left socle (33) and right support (35).