CN2545348Y - Non-skid device for electric roll-up door - Google Patents

Abstract

The utility model discloses the antiskid device of an electric rolling door, includes a swing claw, a torsion spring and a fence. The swing claw is arranged between the big and the small sprockets of the rolling door, one end of the torsion spring is installed on the wall of the support stand hole of the swing claw axis, and the other end is installed on the swing claw. The fence closely next to the swing claw closely clings to an upper chain with the torsion force of the spring by the swing claw. When the chain is broken, the fence immediately rotates anticlockwisely around the fence axis and comes off the swing claw because of the torsion force, and the swing claw rotates around the swing claw axis clockwisely and is ejected into the sprocket channel of the big sprocket which is caused to reverse by the weight of the shutter of the rolling door, thereby preventing the rotation of the big sprocket and the falling of the shutter and guaranteeing the safety of the property safety and the personal safety.

Description

The shoe of electric rolling door

The utility model relates to a kind of shoe, especially for the shoe of electric rolling door.

A kind of shoe that is used for electric rolling door is disclosed in Chinese patent patent No. 99209951.X (April 12 2000 notice of authorization day).This device comprises pin and the roller in swing arm and the swing arm, be installed between two sprocket wheels of electric rolling door, the roller of this device leans against on the chain during normal condition, roll with chain, roller loses support during chain rupture, and swing arm makes the swing arm dog swing in tooth root owing to conduct oneself with dignity to angle of lower swing and just withstands hinge wheel, make hinge wheel static, can't rotate, thereby guarantee that roller shutter every sheet does not glide.But because this device is to rely on the swing arm deadweight to be supported on the chain, and is installed between two sprocket wheels of electric rolling door, so the roller of this device can only be supported on the lower chain.And when rolling door turns round, the main part of the force of chain is to go up chain, therefore chain rupture the most often occurs in portion of chain, like this, when chain rupture took place, the both sides of lower chain still were connected on the big minor sprocket, have only the roller shutter every sheet weight that is fallen when hinge wheel to drive and rotate, after chain came off from big minor sprocket, this device could play above-mentioned effect, prevented the rotation of hinge wheel.

As seen, this device from chain rupture to the hysteresis that worked, hinge wheel still rotates in the time period that lags behind, roller shutter every sheet segment distance that also will fall, and owing to being driven to produce by roller shutter every sheet of free-falling, hinge wheel quickens to rotate during this period, to make the pendulum pawl be difficult to swing in the hinge wheel tooth root and the reliability that influences device when hinge wheel forwards certain speed to, this might cause damage to property and life.

The purpose of this utility model is to overcome the shortcoming of above-mentioned prior art, and a kind of shoe of electric rolling door is provided, and this shoe can be reacting that the chain rupture phenomenon takes place immediately.

Shoe of the present utility model comprises the pendulum pawl, torsion spring and backup plate, pendulum pawl and backup plate are installed in respectively on pendulum pawl axle and the abutment plate axle, and pendulum pawl shaft position is between big minor sprocket, and its position just is fastened between the gear teeth of hinge wheel pendulum pawl pendulum pawl after pendulum pawl axle rotates a phase bit.Torsion spring is connected on the pendulum pawl shaft stool hole wall and on the pendulum pawl, and the pendulum pawl does not contact with hinge wheel during rolling door chain normal condition, and backup plate leans against on the chain roller and backup plate leans against on the pendulum pawl.The tooth root of hinge wheel is corresponding on one end shape of pendulum pawl, size and the reel, and promptly the modulus of dog equates that with the modulus of hinge wheel length is longer than the degree of depth of hinge wheel tooth root.

This shoe is owing to backup plate is being to abut against portion of chain at torsion spring torsion through the effect of pendulum pawl under the normal condition, thereby when the chain rupture phenomenon takes place, backup plate can lose stopping of chain and immediately because the torsion of torsion spring and being flicked by the pendulum pawl, and the pendulum pawl loses stopping of backup plate simultaneously and springs under the twisting force of torsion spring in the gear teeth of hinge wheel and stops hinge wheel to rotate.Roller shutter every sheet continues to fall and issuable adverse consequences after the chain rupture that brings with regard to the hysteresis of having avoided shoe in the prior art like this, and hinge wheel is rotated further after chain rupture and may flicks the adverse consequences of shoe.

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

Fig. 1: user mode figure Fig. 2 of the utility model shoe: the user mode figure of prior art shoe

By a pendulum pawl axle 2 will put that pawl 1 is installed on the bearing, between the size of electric rolling door two sprocket wheels, be close to hinge wheel 7, be positioned at hinge wheel axis upper right side, torsion spring 3 is installed in the left of pendulum pawl 1 and pendulum pawl 1 is imposed to the right torsion, backup plate 4 by an abutment plate axle 5 be installed on the bearing, between the big minor sprocket, the upper right side of pendulum pawl 1, near last chain 6.When normal condition, pendulum pawl 1 contact with hinge wheel 7, and pendulum pawl 1 is owing to the torsion that is subjected to torsion spring 3 withstands right-hand backup plate 4, and backup plate 4 is subjected to putting the torsion spring twisting force that pawl 1 transmits and abuts against on the chain 6, is state A1 at this moment.In case after going up chain 6 fractures, backup plate 4 loses stopping of chain 6 immediately and does around abutment plate axle 5 under by the torsion spring twisting force that transmits of pendulum pawl 1 and rotate counterclockwise, until breaking away from pendulum pawl 1, and pendulum pawl 1 is done around pendulum pawl axle 2 under the torsion spring twisting force simultaneously and is clockwise rotated, pendulum pawl 1 bullet is in hinge wheel 7 teeth groove, and hinge wheel 7 will stop operating, and be state A2 this moment, roller shutter every sheet also stops to fall, to reach immediately and to stop reliably the purpose of roller shutter every sheet whereabouts.

Claims (1)

1, a kind of shoe that is used for electric rolling door, comprise pendulum pawl (1), it is characterized in that: this shoe also comprises torsion spring (3) and backup plate (4), on the described pendulum pawl (1) installing hole is arranged, pendulum pawl (1) is installed between the big minor sprocket by the pendulum pawl axle (2) by installing hole, pendulum pawl (1) is fastened on the wheel between cog of hinge wheel (7) when pendulum pawl axle (2) rotational fixation phase place, torsion spring (3) is connected on the pendulum pawl (1), described backup plate has an installing hole on (4), backup plate (4) is installed between the big minor sprocket by the abutment plate axle (5) by installing hole, backup plate (4) and last chain (6) near and backup plate (4) and pendulum pawl (1) near.