KR20100137086A

KR20100137086A - Reduction gear of smoke/fire curtain shutter operator

Info

Publication number: KR20100137086A
Application number: KR1020090055322A
Authority: KR
Inventors: 김동선
Original assignee: 김동선
Priority date: 2009-06-22
Filing date: 2009-06-22
Publication date: 2010-12-30

Abstract

PURPOSE: A reducer of a driving device for a screen fireproof shutter is provided to increase the efficiency of a driving device and to enable the driving device with a reducer to be integrated with a roller pipe. CONSTITUTION: A reducer of a driving device for a screen fireproof shutter comprises a housing, reductive worm gear array(3,4,5,6), gears(7,71) and a rotating sensor. The housing has a cylinder shape and one end of the housing is connected to a DC motor. The housing comprises a groove, into which a reductive worm gear array can be inserted. The reductive worm gear array consists of two stages so that the central line(31) of the worm of first-stage reductive worm gear row and the central line(61) of the worm wheel of a second-stage reductive worm gear row match with the central line(12) f a motor shaft. The first-stage reductive worm gear row is connected to a DC motor shaft(11). The second-stage reductive worm gear row comprises an output shaft.

Description

Reduction Gear of Screen Fire Shutter Actuator {Reduction gear of smoke / fire curtain shutter operator}

The present invention relates to a speed reducer coupled to a motor of a screen fire shutter drive device. More specifically, a speed reducer of a screen fire shutter drive device having a worm gear train consisting of two stages for implementing a drive device that can be embedded in a roller pipe of a screen fire shutter. It is about.

Usually, the driving device of the screen fire shutter receives electric control signal from the interlocking controller and converts electric energy into rotational energy to realize the function of rolling up the fireproof cloth screen coupled to the roller pipe or unrolling the rolled screen to form a firewall. Motor designed to rotate at high speed to improve efficiency and economy.

Combined with a small motor, it is easy to generate large torque, and a speed reducer is needed to achieve a deceleration speed of 4-5M per minute.

It is combined with a DC motor that provides the environment to operate the driving device by using the emergency power of the battery even in the state of power failure, and the gear reducer using worm gear among the power transmission mechanical elements can realize a large reduction ratio even if the gear diameter is small. It is impossible to reverse rotation to replace the device, and the reduction gear ratio of 1/200 and big torque can be obtained when constructing the reducer with two stages of worm gear train.

The reduction gear worm gear consists of two stages, because the center line of the motor shaft and the output shaft is spaced a certain distance apart and in parallel, that is, when the motor and the worm gear reducer are combined, due to the disadvantage that the center line of the motor shaft and the gear shaft output shaft are inconsistent. Alternatively, when one of the center lines of the motor is used as a reference, a phenomenon occurs in which the motor or the reducer is protruded to one side, and for this reason, a driving device having a worm gear reducer coupled to a DC motor is built in a cylindrical roller pipe. Is difficult,

In order to coincide with the center line of the motor shaft and the output shaft, a separate torque transmission element is additionally required.

In order to solve the above problems, the present invention is combined with a DC motor, and in order to prevent the motor or the reducer from protruding to one side and to minimize the diameter of the reducer, while the center line of the motor shaft and the center line of the reducer output shaft coincide with each other. A structure in which a worm, a worm wheel, and gears, which are power transmission mechanical elements, are concentrated on a center line connecting a center of a motor and a center of a reduction gear output shaft;

An object of the present invention is to provide a speed reducer of a screen fire shutter driving apparatus having a rotation sensor for detecting a rotation speed of a motor.

In order to achieve the above object, the present invention provides a cylindrical housing having a groove (2) for coupling a DC motor to one end and inserting a worm gear train;

Center line 31 of the worm wheel of the 1st speed reduction worm gear train coupled to the DC motor shaft 11, and the center line 61 of the worm wheel of the 2nd speed reduction worm gear train provided with the output shaft are arranged so that the centerline of the motor shaft may match with the centerline 12 of the motor shaft. Reduced worm gear train (3, 4, 5, 6) consisting of; Gears 7 and 71 coupled and engaged with the worm wheel shaft and the worm shaft, respectively, to transfer the reduced rotational force of the first stage worm gear train to the second stage worm gear train; It is characterized by consisting of a rotation sensor having a slit disc 8 and a photo interrupter 82 coupled to the first-stage reduction worm wheel shaft.

As described above, the reduction gear of the screen fire shutter driving apparatus according to the present invention is coupled to a DC motor, and the high torque can be obtained by minimizing the reduction gear diameter and realizing a large reduction ratio so that it can be embedded in a cylindrical roller pipe.

Increase the efficiency of the drive by increasing the lifting weight; It is possible to integrate the drive device with the reducer with the minimum volume into the roller pipe, thereby minimizing the size of the screen fire shutter box; Even if the power failure occurs during a fire, it is possible to control the operation to realize the two-stage drop function in which a smoke barrier is formed first by using a battery and a DC motor, and after a certain period of time, a second firewall is formed. .

The present invention will now be described in detail with reference to the accompanying drawings.

The driving device of the screen fire shutter, which is built in the roller pipe 9 and coupled in a rotatable state by the bushing bearing 92, includes a motor, a speed reducer coupled to the motor and coupled to the drive case 24, and a speed reducer output shaft. It is composed of a structure provided with an auxiliary device such as an electromagnetic brake, an encoder and a disc 91 for connecting the roller pipe to transfer the rotational force of the reduction gear shaft to the roller pipe.

As shown in Figures 1 and 2, the reduction gear of the screen fire shutter drive apparatus according to the present invention to obtain a large torque at the same time while reducing the rotational force of the DC motor coupled to the housing to 10 rpm or less, adjacent to the center line of the motor shaft Gears are arranged so that the reducer is built into the cylindrical roller pipe,

A housing; A two-stage reduction worm gear train including a center line of the first reduction gear worm and a center line of the two reduction gear worm wheels aligned with the center line of the motor shaft; A gear for transmitting the reduced rotational force of the first stage worm gear train to the second stage worm gear train; It consists of a rotation sensor coupled to the single-stage reduction worm wheel shaft.

DC motor (1) that provides rotational force to the reducer

Although it is small, the starting torque is large, and forward and reverse rotation is free, and it overcomes the shortcomings of worm gear which cannot be lowered by self weight by providing rotational power by using emergency power of battery.

It provides an environment to meet the requirements that the screen fire shutter should be operated even in a power failure state.

The housing (2) has a worm wheel inserted into the groove (21, 22) and a fixed plate for coupling the worm in a rotatable state, it is possible to rotate the output shaft of the first stage worm and the second stage worm wheel perforated in the center A groove 23 fastening in a state;

The center line of the 1st reduction worm and the centerline of the 1st reduction worm wheel, the centerline of the 2nd reduction worm center line, and the centerline of the 2nd reduction worm wheel are orthogonal to each other and are spaced apart by the assembly distance of the worm gear train, respectively. 22).

The worm gear train consists of a cylinder with a small diameter and a worm (3,5) made of a toothed screw, and a worm wheel (4,6), which is a gear that bites the worm, and reduces the rotational force of the worm and transmits it to the worm wheel shaft. Although the diameter is smaller than that of the gear, it has a high reduction ratio, and has the disadvantage that the reverse rotation impossibility characteristic of not rotating the worm wheel without the worm rotating and the worm shaft and the worm wheel shaft are orthogonal to each other. It also serves to prevent acceleration caused by its own weight when the screen is lowered.

The two-stage reduction worm gear trains have a larger feature than the one-stage worm gear trains because the gears of the worm gears are thicker than the gears of the first gear.

The worms (3) of the single geared worm gear trains

A cylinder with a small diameter is formed in a tooth-shaped gear tooth shaft shaft is coupled to the bearing at both ends, and inserted into the groove 23 of the housing in a rotatable state, the center line 12 and the center line of the motor shaft ( 31) is characterized in that the motor shaft insertion groove and the tannery bolt screw groove 32 is formed in the center to be matched.

The worm wheel 4 of the single-speed reduction worm gear train 4 is coupled to the groove 22 with the center line 41 orthogonal to the center line 31 of the worm, and is engaged with the worm 3 coupled with the DC motor shaft 1 A shaft 42 formed at the center of the wheel so as to form a step-down worm gear train and decelerate a high rotational speed of the DC motor firstly and to be supported in a rotatable state; A stage formed such that the slit disc is coupled to one end of the shaft; And bearings 43 and 44 for supporting the shaft.

The worm wheel 6 of the two-stage reduction worm gear train is inserted into and coupled to the groove 23 of the housing, and an output shaft 62 of the reduction gear formed at the center thereof; The bearing 63 is coupled to the output shaft to support the worm wheel in a rotatable state, and the center line 61 of the worm wheel is arranged to coincide with the center line 31 of the worm of the first-stage worm gear train.

The worm 5 of the two-speed reduction worm gear train is engaged with the worm wheel 6 and coupled to the groove 21 in a state in which the center line 51 is orthogonal to the center line 61 of the worm wheel. Bearing 53 and 54 coupled to the shaft 52 formed in the center and supported in a rotatable state to be parallel to the center line 41 of the first-stage reduction worm wheel in order to receive the rotational force, and spaced apart from the center line 41. Characterized in having a.

The gears 7 and 71 serve to transfer the reduced rotational force of the first-stage reduction worm gear train to the two-stage reduction worm gear train, and the axis of the first-stage reduction worm wheel in which the center lines 41 and 51 are parallel and spaced apart. 42) and the shaft 52 of the two-stage reduction worm is characterized in that the coupling is integral and engaged.

The rotation sensor is provided to the interlock controller by generating a pulse corresponding to the number of revolutions of the motor to control the operation of the screen fire shutter drive device, for example, to recognize the lower and rising position of the screen, the recognition of the rising and falling speed of the screen. As a device to say

A slit disc 8 which is formed with a slit groove 81 capable of transmitting light and is coupled to one end of the first speed reduction worm wheel shaft; And a photointerrupter 82 coupled to the housing and generating a pulse every time the slit groove passes.

The number of slit grooves 81 perforated in the slit disc is an element representing the moving length of the fireproof cloth screen with respect to the motor speed, but is affected by the diameter of the slit disc.

1 is a deceleration composed of two stages in which a center line of a worm wheel of a second stage worm gear train having an output shaft and a center line of a worm wheel of a second stage worm gear train having an output shaft of the reduction gear of the screen fire shutter driving apparatus according to the present invention are arranged to coincide with the center line of the motor shaft. An exploded perspective view showing a worm sequence.

2 is a cross-sectional view showing a state in which a screen fire shutter driving device having a reducer according to the present invention is coupled to a roller pipe, and a portion of a worm and a worm wheel of the reducer arranged to coincide with a center line of the motor shaft.

1: DC motor 11: Motor shaft

2: housing 21, 22, 23: groove

24: drive case 3: 1 speed reduction worm

32: screw groove 4: 1 speed reduction worm wheel

42: shaft 43,44,53,54,63: bearing

5: 2 speed reduction worm 52: shaft

6: 2 speed reduction worm wheel 62: Output shaft

7,71: gear 12,31,41,51,61: centerline

8: slit disc 82: photo interrupter

9: roller pipe 91: disc

92: bushing bearing

Claims

A housing; The center line 31 of the worm wheel of the 1st speed reduction worm gear train coupled to the DC motor shaft 11 and the center line 61 of the worm wheel of the 2nd speed reduction worm gear train provided with the output shaft 62 are aligned with the centerline 12 of the motor shaft. Worm gear train (3, 4, 5, 6) consisting of two stages;

Gears 7 and 71 coupled to and engaged with the worm wheel shaft 42 and the worm shaft 52 to transmit the reduced rotational force of the first stage worm gear train to the second stage worm gear train; Reducer of the screen fire shutter drive device characterized in that consisting of a rotation sensor having a slit disc (8) and a photo interrupter (82) coupled to the single-stage reduction worm wheel shaft.