CN2775015Y - Electric speed limiter without machine room - Google Patents

Abstract

The utility model relates to an electric speed limiter without a machine room, which is used for limiting the speed of an elevator without a machine room so as to ensure the safety of the elevator operation, and the utility model is an improved design on the base of an original one-way speed limiter. The utility model comprises a rope pulley component arranged on a machine frame, a ratchet wheel ratchet pawl gearing, a switching device, an electromagnet, a triggering plate hinged on the machine frame and a box-shaped plate. A switching top plate is fixed on a ratchet wheel and is in contact with and is connected with a switching contact, a slope of the upper part of the triggering plate is connected with a shaft pin of the head of a ratchet pawl, a touch block of the triggering plate is in contact with and is connected with the electromagnet, a draw rod of the box-shaped plate component is hinged with the ratchet wheel, and the box-shaped plate component has a brake scotch. The utility model not only maintains the advantages of stable speed, flexible action, small volume, compact structure, convenient installation and convenient debugging of the original one-way speed limiter, but also realizes the electric restoration outside a hoistway in an electrical control mode and the utility model makes the speed limiter happen mechanical action. When moving at an overspeed in the ascending direction and the descending direction, the elevator can be respectively switched off and stopped only by one switch. The rated speed scope of the utility model is wide, and the rated speed from 0.5m/s to 2.5m/s can be used.

Description

Electronic machine-room-less speed limiter

Invention field

The utility model relates to the technical field of safety devices of the detection and the correction of elevator overspeed fault, specifically relates to a kind of machine-roomless lift velocity limiter.

Technical background

Traditional elevator governor is to be installed in the machine room, and the engineering staff can be approaching easily, observe and the operation velocity limiter, and for the machine-room-less speed limiter that is installed in the hoistway, it is approaching that the engineering staff is difficult to, and advances people's hoistway to operate dangerous property; Present existing machine-room-less speed limiter, its Applicable scope generally below 1.75m/s, use the command speed scope to be subjected to limit and put.

Summary of the invention

The purpose of this utility model is to overcome the deficiency of prior art, provide a kind of volume little, compact conformation, Installation and Debugging are convenient, can control electrical reset and automatically controlled velocity limiter generation mechanical action outside hoistway, and the wide electronic machine-room-less speed limiter of suitable speed range.

For achieving the above object, the technical solution adopted in the utility model is: improved innovative design on former unidirectional velocity limiter basis; Set up the automatic reset mechanism of electric switch and outside hoistway, can realize the trigger mechanism that the velocity limiter mechanical action takes place; It comprises parts such as rope sheave assembly, ratchet, trigger board, box-like board component, switch and frame, electromagnet; A special bolts is fixed by the build portion of getting rid of in the said rope sheave assembly, and can contact connection with switch contact; On ratchet, fix a switch top board; Said electromagnet is installed on the frame outer wall, and its head is extended; Trigger board is installed on the frame by pivot pin, and a collision block is fixed in the bottom, and collision block stretches out outside the arcuate socket of frame, can contact connection with the head of electromagnet, top with get rid of piece and can contact connection, and be connected to an extension spring, extension spring end in addition is fixed on the frame, is in the normal position to keep trigger board; Said switch is furnished with a small electrical magnet, switch contact is automatically reset, there is a switch contact to stretch out outside the box, can contact connection with the special bolts on getting rid of piece, screw fixing on the switch contact then can contact connection with the switch top board on being fixed on ratchet, switch enclosure is rack-mount, and support and frame fix.

Working process of the present utility model is such: when the rope sheave rotating speed reached electrical action speed, the special bolts of getting rid of on the piece was run into switch contact, blocks power supply, the elevator traction machine stop; If electric protection lost efficacy, elevator continues hypervelocity, when rope sheave rotating speed continuation increase reaches mechanical action speed, get rid of piece and upwards withstand the rotation of ratchet drive ratchet, thereby drive the pull bar in the box-like board component, make stage clip compress the generation tensile force, driving the box-like plate simultaneously rotates, so the brake shoe hold down steel rope on the box-like plate triggers the safety tongs action, makes lift car deceleration stop; Rotate simultaneously with ratchet, screw fixing on switch top board and the switch contact is collided, and makes switch motion by force, cuts off the electricity supply; When the switch top board turns over a set angle (being generally 20-30 °), switch can reset; Like this, when elevator downlink or uplink hypervelocity, behind the velocity limiter generation mechanical action, as long as make elevator operate a segment distance to reversing sense, velocity limiter is mechanical return at first, be that ratchet is returned to the normal position under the effect of torsion spring, the switch top board also is returned to the normal position along with the ratchet reversing, and on closes in-to-in small electrical magnet, makes its energising, switch contact will automatically reset, i.e. electrical reset; When elevator is being checked and accepted or test period, the elevator low cruise, as long as make the electromagnet energising this moment, its head stretches out, withstand the collision block of trigger board, trigger board is rotated, and its upper inclined surface is pushed down ratchet head pivot pin, the ratchet head is rotated, drive ratchet and rotate velocity limiter generation mechanical action; Simultaneously, screw fixing on switch top board and the switch contact is collided, and makes switch motion by force, cuts off the electricity supply, and makes the towing machine stall.

Owing to adopted technique scheme, a kind of electronic machine-room-less speed limiter of the present utility model, both kept former unidirectional velocity limiter velocity-stabilization, be active in one's movements, volume is little, compact conformation, Installation and Debugging advantage easily, again can be outside hoistway automatically controlled realization electrical reset and make velocity limiter generation mechanical action, and only can make the elevator stop of when the uplink and downlink both direction exceeds the speed limit, cutting off the power supply respectively with a switch; Its command speed scope that is suitable for is wide, and is all available from 0.25-2.5m/s.

Description of drawings

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

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is the H-H cutaway view of Fig. 1.

Among the figure: 1, switching device, 2, screw, 3, switch contact, 4, switch top board, 5, the rope sheave assembly, 6, main shaft, 7, screw, 8, ratchet, 9, bearing, 10, lock pin, 11, frame, 12, switch bracket, 13, pull bar, 14, stage clip lid, 15, stage clip, 16, box-like plate, 17, brake scotch, 18, the brake scotch pin, 19, box-like plate pin, 20, extension spring, 21, trigger board, 22, collision block, 23, electromagnet, 24, baffle plate, 25, governing spring, 26, overbolt, 27, ratchet, 28, get rid of piece, 29, screw, 30, special bolts.

The specific embodiment

By Fig. 1-shown in Figure 2, a kind of electronic machine-room-less speed limiter of the present utility model comprises parts such as rope sheave assembly 5, ratchet 8, trigger board 21, box-like board component, switching device 1 and frame 11, electromagnet 23; Rope sheave main shaft 6 in the said rope sheave assembly 5 is installed on the frame 11 by bearing 9, and fixing by baffle plate 24, connect by threaded pin on the rope sheave and get rid of piece 28, threaded pin and get rid of piece axisymmetricly two groups are arranged, be connected with connecting rod between two groups, connecting rod with get rid of interblock and can freely rotate mutually; Between threaded pin and rope sheave needle bearing is housed, gets rid of piece and can freely rotate relative to rope sheave; Therein one gets rid of on the threaded pin of piece ratchet 27 also is housed, the ratchet afterbody fix one can with get rid of piece and contact the screw 29 that connects, it between ratchet and the threaded pin free-running fit, be provided with torsion spring between ratchet and rope sheave, one get rid of between the afterbody of piece and spoke and be connected with an overbolt 26 at this by contiguous block, governing spring 25 is housed on the overbolt, gets rid of build portion and fix a special bolts 30, can contact connection with switch contact; Said ratchet 8 is installed on the rope sheave main shaft by axle bush, match with ratchet, on ratchet, fix a switch top board 4 by screw 7, on ratchet, have an arcuate socket, on the frame of the relevant position in this hole, fix a lock pin 10, lock pin stretches in the hole spacing, and the radian of arcuate socket is 1/9 π-1/6 π; Said electromagnet 23 is installed on the frame outer wall, and its head is extended; Trigger board 21 is installed on the frame by pivot pin, a collision block 22 is fixed in the bottom, collision block stretches out outside the arcuate socket of frame, can contact connection with the head of electromagnet, trigger board upper inclined surface and ratchet head pivot pin bump and connect, and being connected to an extension spring 20, the extension spring other end is fixed on the frame, is in the normal position to keep trigger board; Said box-like board component by box-like plate 16, be fixed in pull bar 13 on the box-like plate, stage clip 15, stage clip lid 14 and form by pivot pin 18 and box-like plate pivotally attached brake scotch 17, wherein the head of pull bar and ratchet are hinged by pivot pin, and the box-like board component is installed on the frame by pivot pin 19; Is furnished with a small electrical magnet in the said switching device 1, be located in the switch enclosure together, there is a switch contact 3 to stretch out outside the box, can contact connection with the special bolts on getting rid of piece, 2 fixing on the switch contact on screw can contact connection with the switch top board, switch enclosure is installed on the support 12, and support and frame fix.

Claims (2)

1, a kind of electronic machine-room-less speed limiter comprises the rope sheave assembly (5), switching device (1) and the box-like board component that are installed on the frame (11); In the said rope sheave assembly (5), main shaft (6) is installed a ratchet (8) by axle bush, be hinged with symmetry on rope sheave two groups are got rid of piece (28), two get rid of interblock is connected with connecting rod, one get rid of on the hinged pivot pin of piece the ratchet (27) that matches with ratchet (8) is housed therein, be provided with torsion spring between ratchet and rope sheave, the ratchet afterbody fix one can with get rid of piece and contact the screw (29) that connects, this gets rid of build portion and fixes a special bolts (30), on ratchet, fix a switch top board (4), and have an arcuate socket, on the frame of the relevant position in this hole, fix a lock pin (10), lock pin stretches in the hole, and the radian of arcuate socket is 1/9 π-1/6 π; Said box-like board component is articulated on the frame, is made up of box-like plate (16) and the pull bar (13) that is fixed thereon, stage clip (15), stage clip lid (14) and the brake scotch (17) that is hinged with it, and wherein the head of pull bar and ratchet are hinged; Said switching device (1), its switch contact (3) can contact connection with special bolts (30) on getting rid of piece, fix a screw (2) on the switch contact, this screw can contact connection with the switch top board, it is characterized in that: also be furnished with a small electrical magnet in switching device; And an electromagnet (23) is installed on frame; An also hinged trigger board (21) on frame, a collision block (22) is fixed in this trigger board bottom, can contact connection with the head of electromagnet (23), and upper inclined surface and ratchet head pivot pin bump and connect.

2, a kind of electronic machine-room-less speed limiter according to claim 1 is characterized in that: be provided with an extension spring (20) between said trigger board (21) top and frame.