Patent Application
20200080373
The present invention is related to a door operator with high-speed operation and fire escape functions, in particular, a door operator that can be installed on an electric rolling door for fire prevention and escape in a building in the event of a fire, and can serve as an anti-theft security system in normal time.
To meet the requirements for environmental protection and energy saving, such as avoiding the leakage of air-conditioning air or heating air, and reducing waiting time of the users, the speed of opening and closing the electric rolling door during normal operation has become faster and faster. In general, the speed may be as high as 40 to 60 meters per minute.
On the other hand, in the event of a fire, sufficient time should be reserved for the people passing safely. As such, the rolling door should be slowly closed and prevented damage from the fire/smoke alarm closing. Furthermore, some countries have specific requirements for the closing speed of electric rolling door in the event of a fire.
Therefore, in normal operation, it is required that the door operator should operate at a relatively high speed, while in the event of a disaster, where the power supply is normally interrupted, the door operator should close the rolling curtain at a relatively slow speed. To perfect the operation, rigorous requirements have to be fulfilled.
At present, in order to attain the above object, two sets of door operators and two roll-up doors are normally provided. One set is for use in a normal condition, in which the motor of the door operator operates at high speed to wind up or down the rolling curtain. The other set is specially used in the event of fire escape for fire and smoke prevention. For such purpose, a simple mechanism is normally used, and the rolling curtain is allowed to drop gradually due to gravity. However, such prior art technique not only involves expensive cost, but also the mechanism involved is bulky.
The primary object of the present invention is to provide a door operator with high-speed operation and fire escape functions, which can provide high-speed operation under normal condition, and can automatically close the door curtain at a gradual slow speed when a disaster occurs.
The door operator with high-speed operation and fire escape functions according to the present invention primarily comprises: a motor having a drive shaft; a high-speed centrifugal brake module coupled to one end of the drive shaft for generating a braking force when the rotational speed of the drive shaft exceeds a predetermined rotational speed, the braking force increases in magnitude with the increase in the rotational speed; a centrifugal reduction module coupled to the high-speed centrifugal brake module for maintaining the rotational speed of the drive shaft within a predetermined range; a central shaft locking module coupled to the centrifugal reduction module for locking the drive shaft of the motor; a first clutch module disposed between the high-speed centrifugal brake module and the centrifugal reduction module, and constantly connecting the high-speed centrifugal brake module to the centrifugal reduction module; and a second clutch module disposed between the centrifugal reduction module and the central shaft locking module, and constantly connecting the centrifugal reduction module to the central shaft locking module. In a stationary state, the drive shaft of the motor is locked by the central shaft locking module. In a normal operation state of the door operator 1, the first clutch module is controlled to disengage the high-speed centrifugal brake module from the centrifugal reduction module. In the event of a disaster such as fire break out, the second clutch module is controlled to disengage the centrifugal reduction module from the central shaft locking module.
Accordingly, the present invention may switch between the stationary mode, the normal operation mode and the fire escape mode by controlling the operations of the first and second clutch module. Moreover, the high-speed centrifugal brake module can serve as a safety protection measure. In particular, when the door operator malfunctions and the door curtain drops at high speed, the door curtain may automatically decelerate to provide safety. In addition, the centrifugal reduction module serves to make the rolling curtain to drop slowly during a disaster, with or without the power supply.
The above and further objects and novel features of this invention will more fully appear from the following detailed description with reference to the accompanied drawings, in which:
The present invention is related to a door operator with high-speed operation and fire escape functions. In the description hereinafter, similar elements will be denoted by the same reference numerals. Furthermore, the drawings as illustrated are merely intended to be illustrative, and are not necessarily drawn to scale, and all details of the invention are not necessarily be shown in the drawings.
Referring to
The electric machine 2 comprises a motor having a drive shaft 21 coupled at one side (shown as the left side in the figures) to the reduction gear module 91. The reduction gear module 91 provides the effect of reduction (reduction effect) by means of a plurality of gears of different specifications. The reduction gear module 91 comprises an input portion 910 connected to the drive shaft 21, and an output portion 911 connected to the output shaft 92. The output shaft 92 drives a door shaft of the rolling door (not shown) by means of a chain to wind up or drop the door curtain.
Referring to
In this preferred embodiment, the high-speed centrifugal brake module 3 mainly comprises an end plate 31, an annular brake assembly 32 and a pair of springs 33. The end plate 31 is connected to the drive shaft 21 of the motor 2 to rotate therewith. The annular brake assembly 32 includes a pair of brake blocks 321. Each of the brake block 321 has one end pivotally connected to the end plate 31. Both ends of the two springs 33 are respectively connected to the two brake blocks 321, so as to urge the two brake blocks 321 to approach each other. When the end plate 31 rotates at a high speed, and exceeds a first predetermined rotational speed, which is, for example, 1800 RPM in this embodiment, the two brake blocks 321 that are subjected to the centrifugal force will overcome the tension of the spring 33, and extend radially outward to urge against the first brake ring 30 of the frame 11 of the door operator 1 to thereby generate the brake force which tends to increase in magnitude as the rotational speed increases.
The first clutch module 4 is disposed between the high-speed centrifugal brake module 3 and the centrifugal reduction module 5. The first clutch module 4 includes a first linkage shaft 211, a first rotating disc 41, a first brake disc 42, a first auxiliary brake disc 45, an electromagnetic brake 43, a first tension spring 44, and a first fixed partition plate 401. The first rotating disc 41 is connected to the end plate 31 of the high-speed centrifugal brake module 3, so as to synchronously rotate with the end plate 31 and the drive shaft 21. The first linkage shaft 211 is arranged coaxially with the drive shaft 21.
The first auxiliary brake disc 45 is mounted on the first linkage shaft 211, and located between the end plate 31 and the first rotating disc 41. The first fixed partition plate 401 is secured onto the frame 11 of the door operator 1, and the electromagnetic brake 43 is assembled on the first fixed partition plate 401. The first brake disc 42 and the first tension spring 44 are sleeved on the first linkage shaft 211. The first tension spring 44 is arranged to have one end abut against the first fixed partition plate 401, and the other end abut against the first brake disc 42, so as to constantly urge the first brake disc 42, the first rotating disc 41, the first auxiliary brake disc 45 and the end plate 31 to attach to each other. By this arrangement, the drive shaft 21, the high-speed centrifugal brake module 3, the first linkage shaft 211, and the centrifugal reduction module 5 can be rotated or braked jointly.
On the other hand, when the electromagnetic brake 43 is actuated to excitation upon the receipt of a telecommunication signal, the electromagnetic brake 43 will attract the first brake disc 42, thereby causing the first brake disc 42, the first rotating disc 41, the first auxiliary brake disc 45, and the end plate 31 to disengage from each other. At this instant, the drive shaft 21 disengages from the first linkage shaft 211, and the high-speed centrifugal brake module 3 disengages from the centrifugal reduction module 5, and thus the drive shaft 21 is freely rotatable.
Referring now to
The centrifugal reduction module 5 of the present embodiment includes a rotating disc 51 sleeved on a first linkage shaft 211, an annular reduction assembly 52, and a spring (not shown). The annular reduction assembly 52 includes a pair of speed reduction blocks 521, with one end of each speed reduction block 521 pivotally connected to the rotating disk 51.
As such, when the first linkage shaft 211 rotates at a high speed, and exceeds a second predetermined rotational speed, which is, for example, 350 RPM in this embodiment, the two speed reduction blocks 521 that are subjected to the centrifugal force will overcome the tension of the spring (not shown), and extend radially outward to urge against the second brake ring 40 connected to the first fixed partition plate 401 to generate a braking force, and the rotational speed of the second linkage shaft 212 is maintained within a specific range of 350 RPM to 450 RPM.
Moreover, the second clutch module 6 includes a second linkage shaft 212, a second rotating disc 61, a second brake disc 62, a second auxiliary brake disc 65, a manual release mechanism 63 and a second tension spring 64. The second linkage shaft 212 is disposed coaxially with the first linkage shaft 211 and the drive shaft 21, and the second rotating disc 61 is coupled to the first linkage shaft 211 through the rotary disc 51. In addition, the manual release mechanism 63 comprises a cam retaining member 631, a cam movable member 632, a release lever 633 and a second fixed partition plate 634. The second fixed partition plate 634 is secured to the frame 11 of the door operator 1. The second brake disc 62, the second auxiliary brake disc 65 and the second tension spring 64 are sleeved on the second linkage shaft 212.
In addition, the second tension spring 64 is arranged to have one end abut against the second fixed partition plate 634, and the other end abut against the second brake disk 62, so as to constantly urge the second brake disk 62, the second rotating disk 61, and the second auxiliary brake disc 65 to attach to each other, so that the second linkage shaft 212 is coupled to the first linkage shaft 211. In addition, the cam retaining member 631 is disposed on one side of the second fixed partition plate 634, and the cam movable member 632 is sleeved on the second linkage shaft 212. The cam movable member 632 and the cam retaining member 631 are attached to each other, and the end face of the members 632 and 631 that opposes each other includes a cam surface having a mating configuration. The release lever 633 has one end coupled to the cam movable member 632, and the other end extends out of the frame 11.
As such, when the release lever 633 is actuated, the cam surface of the cam movable member 632 and that of the cam retaining member 631 will be displaced from each other, and thus overcome the resilient force of the second tension spring 64, and drive the second linkage shaft 212 to axially displace the second brake disc 62, thereby rendering the second brake disc 62 to disengage from the second rotating disc 61. At this instant, the second linkage shaft 212 disengages from the first linkage shaft 211, and the high-speed centrifugal brake module 3 and the centrifugal reduction module 5 disengage from the central shaft locking module 7, and are free to rotate.
With reference to
In further detail, the central shaft locking module 7 of this embodiment includes a third fixed partition plate 701, a center shaft portion 71, a stationary sleeve 72, a movable sleeve 73 and a sleeve clutch mechanism 74. The third fixed partition plate 701 is secured to the frame 11, and the center shaft portion 71 is coupled to the second linkage shaft 212. The sleeve clutch mechanism 74, the stationary sleeve 72 and the movable sleeve 73 are coaxially arranged on the center shaft portion 71 in sequential order.
The sleeve clutch mechanism 74 includes four stationary posts 741, eight movable posts 742 and four springs 743 that are disposed in between the stationary sleeve 72 and the center shaft portion 71. The stationary posts 741 are connected to the movable sleeve 73, and the stationary sleeve 72 is fixed to the third fixed partition plate 701. In addition, the center shaft portion 71 is provided with a plurality of radial convex portions 711 having convex angles. A first spacing D1 exists between the outer periphery of each radial convex portion 711 and the inner periphery of the stationary sleeve 72. The diameter of the stationary post is smaller than the first spacing D1, and the diameter of the movable post 742 is greater than the first spacing D1.
A stationary post 741 and a spring 743 are disposed alternately between two adjacent movable posts 742. In particular, as shown in
Referring now again to
The operations regarding the state of use of the present invention will be described hereinafter. Firstly, in the stationary state, the first clutch module 4 and the second clutch module 6 are not activated, so the high-speed centrifugal brake module 3, the centrifugal reduction module 5 and the central shaft locking module 7 are connected to each other. As such, the drive shaft 21, the first linkage shaft 211 and the second linkage shaft 212 are locked by the central shaft locking module 7, and are not rotatable.
In the normal operation state of the door operator 1, upon the receipt of a telecommunication signal, the first clutch module 4 is actuated, and renders the high-speed centrifugal brake module 3 disengages from the centrifugal reduction module 5. At this time, the drive shaft 21 of the motor 2 is free to rotate at high speed, and is restrained only by the high-speed centrifugal brake module 3. In other words, in the event that the interior mechanism of the door operator 1 fails, resulting in malfunction of the drive shaft 21, the high-speed centrifugal brake module 3 will provide a braking force to dampen the rotational speed of the drive shaft 21, thereby preventing the components from being damaged, or any cause of harm.
In the event of a fire escape, when a user manually operates the release lever 633 of the manual release mechanism 63 to roll down the door curtain so as to prevent the flame or smoke from spreading, the second clutch module 6 is actuated to disengage the drive shaft 21, the first linkage shaft 211 and the second linkage shaft 212 from the central shaft locking module 7. At this instant, the rotation of the drive shaft 21 is restricted by the centrifugal reduction module 5 so that its rotation speed is maintained in the range of 350 RPM to 450 RPM. That is to say, the dropping of the door curtain is maintained at the speed of 3 m/sec. to 6 m/sec. (meters per second)
The manual release mechanism 63 of the present embodiment may be replaced with a damage prevention device having a control circuit board and a battery, and the second clutch module 6 may comprise an electromagnetic clutch. In the event of a disaster, the control circuit board of the damage prevention device will trigger the second clutch module 6 to actuate.
Under the mode of manual winding up the door curtain, it generally refers to a state where the power is interrupted or the door curtain is closed in the event of a fire, and it is necessary to raise up the door curtain for escape. Under this mode, as in the stationary state, the high-speed centrifugal brake module 3, the centrifugal reduction module 5, and the central shaft locking module 7 are connected to each other, and the drive shaft 21, the first linkage shaft 211 and the second linkage shaft 212 are not rotatable as they are locked by the central shaft locking module 7. However, at this time, the user only needs to rotate the chain disc of the manual drive module 8 to drive the drive shaft 21, the first linkage shaft 211 and the second linkage shaft 212 into rotation, thereby driving the output shaft 92 to wind up the door curtain.
The preferred embodiments of the present invention are illustrative only, and are not limited to the details disclosed in the drawings and the specification. Various changes can be made by those having ordinary skill in the art without departing from the equivalent changes and modifications made by the claims of the present invention, and should belong to the scope of the present invention.
| Number | Date | Country | Kind |
|---|---|---|---|
| 107131352 | Sep 2018 | TW | national |
