CN211008305U

CN211008305U - Braking device for slowing down descending speed of fireproof rolling shutter door

Info

Publication number: CN211008305U
Application number: CN201921803959.3U
Authority: CN
Inventors: 常兴涛; 常剑; 张海祥; 程丽丽; 薄夫英
Original assignee: Shandong Anshun Fire Equipment Co ltd
Current assignee: Shandong Anshun Fire Equipment Co ltd
Priority date: 2019-10-24
Filing date: 2019-10-24
Publication date: 2020-07-14
Anticipated expiration: 2029-10-24

Abstract

The utility model discloses a braking device for slowing down the descending speed of a fireproof rolling door, belonging to the technical field of fireproof rolling doors, which comprises a box body fixed on the wall surface, a scroll driven by a motor and rotationally connected with the box body, a curtain plate rolled on the scroll and fixedly connected with the scroll at one end, a transmission mechanism and a damping mechanism; the transmission mechanism comprises a rotating shaft, a sun gear, an elliptic planetary gear and an inner gear ring, the rotating shaft is coaxially connected with the reel, one end of the reel is rotatably connected with the box body according to the principle of the rotating shaft, the sun gear is coaxially and fixedly connected to the rotating shaft, the elliptic planetary gear is meshed with the sun gear and the inner gear ring, and the damping mechanism is fixedly arranged on the box body and is connected with the inner gear ring. Through the above proposal, the curtain board has resistance when descending, the escape personnel are not easy to be injured by crashing the curtain board, and the faster the rotating speed, the larger the resistance is, the descending speed of the curtain board can be slowed down.

Description

Braking device for slowing down descending speed of fireproof rolling shutter door

Technical Field

The utility model belongs to the technical field of the fire prevention rolling slats door, especially, relate to a arresting gear who slows down fire prevention rolling slats door slew velocity.

Background

The fire-proof rolling door is a fire-proof and heat-insulating facility suitable for large openings of buildings, is widely applied to fire-proof partition areas of industrial and civil buildings, can effectively prevent fire from spreading, guarantees life and property safety, and is an indispensable fire-proof facility in modern buildings.

At present, the Chinese patent with publication number CN108756694A proposes a self-triggering fireproof rolling door, which comprises a rolling door body, a sliding groove, a rolling shaft, a mounting seat and a ratchet gear, wherein the rolling door body is wrapped on the rolling shaft when being folded, the rolling door body is clamped in the sliding groove when being put down, a counterweight block is fixedly arranged on the rolling door body, the rolling shaft is rotationally connected on the mounting seat, the ratchet wheel of the ratchet gear is coaxially and fixedly connected with the rolling door, a first compression spring is transversely and fixedly arranged at the lower position of the ratchet gear, the front end surface of the first compression spring is fixedly connected with a limit strip, a baffle is fixed at the front end position inside the self-triggering frame, the rear end surface of the baffle is fixedly connected with a second compression spring, the other end of the second compression spring is fixedly connected with a top column, a connecting sheet is tightly welded on the bottom surface of the top column, and a fuse wire is connected between the connecting sheet and the baffle. When a fire disaster happens, the fuse wire is fused at high temperature, the spring drives the ejection column to be abutted against one end of the pawl far away from the ratchet wheel, the pawl is disengaged from the ratchet wheel, and the roller shutter door body is driven by the balancing weight to fall in a free falling body mode.

Among the above-mentioned technical scheme, because the rolling slats door does not set up the brake equipment of curtain, the speed can be very big when the curtain falls down, and the curtain can injure flee personnel of fleing when having fleeing personnel to pass through below the curtain, and the personnel of not being convenient for flee.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a slow down arresting gear of fire prevention rolling slats door decline speed.

The utility model discloses a can realize through following technical scheme:

a braking device for slowing down the descending speed of a fireproof rolling door comprises a box body fixed on a wall surface, a scroll driven by a motor and rotationally connected with the box body, a curtain plate wound on the scroll, and a transmission mechanism and a damping mechanism, wherein one end of the curtain plate is fixedly connected with the scroll; the transmission mechanism comprises a rotating shaft, a sun gear, an elliptic planetary gear and an inner gear ring, the rotating shaft is coaxially connected with the reel, one end of the rotating shaft, which is far away from the reel, is rotatably connected with the box body, the sun gear is coaxially and fixedly connected on the rotating shaft, the elliptic planetary gear is meshed with the sun gear and the inner gear ring, and the damping mechanism is fixedly arranged on the box body and is connected with the inner gear ring.

According to the technical scheme, when the curtain plate descends, the sun wheel is driven to rotate, the sun wheel drives the elliptic planetary gear to rotate, the elliptic planetary gear drives the inner gear ring to fluctuate, the inner gear ring is connected with the damping mechanism, the damping mechanism absorbs energy from the inner gear ring and provides resistance to the rotating shaft, the faster the rotating speed of the scroll is, the larger the resistance is, the curtain plate further falls at a safe speed at a constant speed, and people escaping due to injury of the curtain plate are avoided.

Furthermore, the damping mechanism comprises a plurality of springs and a damper shell, the damper shell is fixedly connected to the box body, one end of each spring is fixedly arranged on the outer periphery of the inner gear ring, and the other end of each spring is fixedly arranged on the inner periphery of the damper shell.

Through the technical scheme, when the curtain plate descends, the reel drives the inner gear ring to jump, the spring can absorb energy brought by the jumping of the inner gear ring, the descending speed of the curtain plate is reduced, the inner gear ring can be fixed, and the inner gear ring is prevented from sliding along the axial direction of the rotating shaft.

Furthermore, the damper shell is abutted against two end faces of the sun gear, the elliptic planetary gear and the inner gear ring.

Through the technical scheme, the damper shell blocks the sun gear, the elliptic planetary gear and the inner gear ring from axially sliding along the rotating shaft, so that gear disengagement is avoided, and the transmission performance is ensured.

Furthermore, a damping liquid cavity is formed by the damper shell and the inner gear ring, and is filled with damping liquid.

Through the technical scheme, when the curtain board falls, the reel drives the inner gear ring to bounce, and the inner gear ring absorbs kinetic energy of the falling curtain board under the resistance of the damping liquid, so that the falling speed of the curtain board is reduced.

Further, the upper end of the damper shell is fixedly provided with a liquid inlet pipe, one end of the liquid inlet pipe is communicated with the damping liquid cavity, the other end of the liquid inlet pipe is communicated with the atmosphere, and a nut is connected with one end of the liquid inlet pipe, which is communicated with the atmosphere, through threads.

Through above-mentioned technical scheme, the setting of feed liquor pipe is convenient for the maintainer to injecting damping fluid in the damping fluid chamber, ensures that damping mechanism has the resistance that slows down the curtain board and descends.

Furthermore, a visible window is arranged on the end face of the damper shell.

Through the technical scheme, when the fireproof rolling door is inspected and overhauled, the convenience of maintainers observe the liquid level of the damping liquid in the damping liquid cavity.

Furthermore, the periphery of the inner gear ring is upwards fixedly provided with sealing gaskets which are abutted against two end faces of the damper shell.

Through above-mentioned technical scheme, prevent revealing of damping fluid, maintained the ability that damping mechanism slowed down the curtain board and descends.

Furthermore, a unidirectional rotating mechanism which enables the rotating shaft to rotate only in a unidirectional mode is arranged on the rotating shaft and connected with the reel.

Through the technical scheme, the rotating shaft only rotates when the curtain plate descends, and the curtain plate does not rotate when ascending, so that the power of the motor is prevented from being wasted.

Furthermore, one-way slewing mechanism includes ratchet, pawl and torsion spring, and the pivot cover is established outside the spool, and the ratchet is seted up on the inner wall of pivot, and the pawl articulates upwards in the periphery of spool, and the torsion spring cover is established on the articulated shaft of pawl and spool, and torsion spring's one end and pawl fixed connection, torsion spring's the other end and spool fixed connection.

Through above-mentioned technical scheme, the pivot is established ratchet pawl cover inside, and the ratchet is difficult for receiving the external influence with the pawl, is difficult for becoming invalid, and then makes the difficult inefficacy of the one-way transmission of pivot.

Furthermore, a first support is arranged at one end of the scroll close to the rotating shaft, a second support is arranged at one end of the rotating shaft close to the scroll, one end of the first support is rotatably connected with the scroll, and the other end of the first support is fixedly connected with the box body; one end of the second support is rotatably connected with the rotating shaft, and the other end of the second support is fixedly connected with the box body.

Through above-mentioned technical scheme, strengthened the intensity of spool and pivot, reduced the bending stress of spool and pivot junction, ratchet and the difficult bending deformation of pawl.

To sum up, with current technical contrast, the beneficial effects of the utility model are as follows:

1. through the arrangement of the transmission mechanism and the damping mechanism, the curtain plate can descend at a constant speed when descending, and the escape personnel are not easily injured by the curtain plate, so that the escape personnel are protected.

2. The unidirectional rotating mechanism is arranged on the rotating shaft, so that the rotating shaft can only rotate when the curtain board descends, the damping mechanism does not generate resistance when the curtain board ascends, the efficiency of rolling up the curtain board by the motor is improved, and the energy consumption is also reduced.

3. Through setting up ratchet and pawl in the inside of pivot for ratchet and pawl are difficult for suffering destruction when ordinary maintenance and exercise.

Drawings

FIG. 1 is a schematic partial sectional view of the present embodiment;

FIG. 2 is an enlarged view of a portion of A in FIG. 1;

FIG. 3 is a schematic view of a portion of the present invention;

FIG. 4 is a partially enlarged view of B in FIG. 3;

fig. 5 is a partial structural view of the reel.

Reference numerals: 11. a box body; 12. a reel; 13. a curtain plate; 2. a transmission mechanism; 21. a rotating shaft; 22. a sun gear; 23. an elliptical planetary gear; 24. an inner gear ring; 3. a damping mechanism; 31. a spring; 32. a damper housing; 33. a damping fluid chamber; 34. a liquid inlet pipe; 35. a nut; 36. a visible window; 37. a gasket; 4. a unidirectional rotation mechanism; 41. a ratchet wheel; 42. a pawl; 43. a torsion spring; 51. a first support; 52. a second support.

Detailed Description

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

Referring to fig. 1, when a fire occurs, the fire-resistant rolling door needs to be lowered to prevent the fire from spreading, but when the fire-resistant rolling door is lowered, a person may escape under the fire-resistant rolling door. When the main circuit or the standby circuit can still supply power to the control system of the fire-proof rolling door, the descending speed of the fire-proof rolling door can be controlled by the control system, and after the main circuit and the standby circuit are powered off, the fire-proof rolling door can descend in a free-falling mode. Therefore, the embodiment provides a braking device capable of slowing down the descending speed of a fire-proof rolling door after a main circuit and a standby circuit are both powered off, the braking device comprises a box body 11, a scroll 12 and a curtain plate 13, the box body 11 is generally fixed on a wall body through bolts or rivets, a bearing seat is arranged in the box body 11, the bearing seat is sleeved outside the scroll 12 and placed on the bearing seat, the scroll 12 is rotatably connected with the box body 11, one end of the curtain plate 13 is fixedly connected onto the scroll 12 through bolts or rivets, and the braking device further comprises a transmission mechanism 2 and a damping mechanism 3.

Referring to fig. 2, the transmission mechanism 2 includes a rotating shaft 21, a sun gear 22, an elliptic planetary gear 23, and an inner gear ring 24, the rotating shaft 21 is coaxially connected to the reel 12, a bearing seat is provided in the box 11, and the bearing seat is sleeved outside the rotating shaft 21 and placed on the bearing seat of the box 11, so that the rotating shaft 21 and the reel 12 are concentric and are rotatably connected to the box 11. The sun gear 22 can be coaxially and fixedly connected to the rotating shaft 21 through a pin key, or the rotating shaft 21 can be set as a gear shaft, the elliptic planetary gear 23 is meshed with both the sun gear 22 and the inner gear 24, and the damping mechanism 3 is fixedly arranged on the box body 11 and connected with the inner gear 24.

When the curtain board 13 falls, the scroll 12 drives the rotating shaft 21 to rotate, the sun gear 22 and the elliptic planetary gear 23 drive the inner gear ring 24 to generate irregular eccentric rotation, and then the inner gear ring 24 is connected with the damping mechanism 3, so that the damping mechanism 3 can consume energy brought by the falling of the curtain board 13.

In order to fix the ring gear 24 and at the same time to eccentrically rotate the ring gear 24, the damper mechanism 3 includes a plurality of springs 31 and a damper housing 32, and the damper housing 32 is fixedly connected to the case 11. The springs 31 are uniformly distributed on the outer side of the inner gear ring 24 by taking the rotating shaft 21 as an axis, one ends of the springs 31 are spot-welded or clamped on the outer periphery of the inner gear ring 24, and the other ends of the springs 31 are fixedly arranged on the inner periphery of the damper shell 32 by spot-welding or clamping.

In an initial state, the sun gear 22 and the inner gear ring 24 are coaxial, and the minor axis of the elliptical planetary gear 23 is abutted against the sun gear 22 and the inner gear ring 24, so that the spring 31 is prevented from being deformed by the inner gear ring 24 when the rotating shaft 21 does not rotate, and finally the elliptical planetary gear 23 cannot be meshed.

In order to consume energy generated when the curtain plate 13 descends, the damping mechanism 3 of the present embodiment uses liquid as damping, the damper housing 32 is in contact with both end surfaces of the sun gear 22, the elliptical planetary gear 23, and the ring gear 24, the damper housing 32 and the ring gear 24 form a damping liquid chamber 33, and the damping liquid chamber 33 is filled with damping liquid. The upper end of the damper housing 32 is integrally formed with a liquid inlet pipe 34, one end of the liquid inlet pipe 34 is communicated with the damping liquid chamber 33, and the other end of the liquid inlet pipe 34 is communicated with the atmosphere. The end of the liquid inlet pipe 34 communicated with the atmosphere is connected with a screw cap 35 through threads, and the end face of the damper shell 32 is provided with a visible window 36.

The damping fluid may be water or water-based, and when maintenance or repair is performed, it is possible to determine whether the damping fluid needs to be added to the damping fluid chamber 33 by observing the level of the liquid in the visible window 36. When the damping liquid is added, the damping liquid is poured into the liquid inlet pipe 34 by opening the screw cap 35, and the screw cap 35 is screwed after the damping liquid is added, so that the damping liquid is prevented from being diffused.

The periphery of the inner gear ring 24 is upwards sleeved with sealing gaskets 37 which are abutted against two end faces of the damper shell 32, because of the arrangement of the springs 31, the periphery of the inner gear ring 24 is upwards provided with a plurality of grooves or blocks for clamping the springs 31, and through holes are formed in the positions, opposite to the sealing gaskets 37, of the inner gear ring 24 for the springs 31 to penetrate through. The sealing gasket 37 may be made of rubber, has certain elasticity, and the section of the sealing gasket 37 may be made into a U shape, so that the sealing gasket 37 may wrap three surfaces of the ring gear 24 to improve the sealing effect.

Referring to fig. 3, in order to prevent the damping mechanism 3 from consuming energy of the motor when the curtain plate 13 ascends, the unidirectional rotation mechanism 4 is provided at a portion where the winding shaft 12 is connected to the rotation shaft 21, so that the rotation shaft 21 is rotated only when the curtain plate 13 descends, and the rotation shaft 21 is not rotated when the curtain plate 13 ascends.

Because the reel 12 is to be connected coaxially with the rotating shaft 21, and both the reel 12 and the rotating shaft 21 are cantilever beams, the structure of the joint of the reel 12 and the rotating shaft 21 is very easy to damage due to the arrangement, so that the first support 51 and the second support 52 are integrally formed on the box body 11 or fixed by using bolts, the reel 12 is supported by the first support 51, the rotating shaft 21 is supported by the second support 52, the reel 12 and the rotating shaft 21 become simple beams, and the strength of the reel 12 and the rotating shaft 21 is improved.

Referring to fig. 4 and 5, the unidirectional rotation mechanism 4 includes a ratchet wheel 41, a pawl 42 and a torsion spring 43, the rotation shaft 21 is sleeved outside the rotation shaft 21, the ratchet wheel 41 is opened on the inner wall of the rotation shaft 21, the pawl 42 is hinged on the periphery of the winding shaft 12, the torsion spring 43 is sleeved on the hinge shaft of the pawl 42 and the winding shaft 12, one end of the torsion spring 43 is abutted or spot-welded on the pawl 42, and the other end of the torsion spring 43 is abutted or spot-welded on the winding shaft 12. So set up alright make pivot 21 unidirectional rotation, pivot 21 establishes ratchet 41 pawl 42 cover inside simultaneously, and ratchet 41 is difficult for receiving the external influence with pawl 42, is difficult for becoming invalid, and then makes the unidirectional transmission of pivot 21 difficult for becoming invalid.

The implementation principle of the embodiment is as follows:

when a fire disaster occurs, the main circuit and the standby circuit are powered off, the reel 12 falls under the gravity of the curtain plate 13, and the reel 12 drives the rotating shaft 21 to rotate when the curtain plate 13 falls; then, the inner gear ring 24 can only eccentrically rotate under the driving of the sun gear 22 and the elliptic planetary gear 23 and the limitation of the spring 31; the inner gear ring 24 receives the resistance of the damping liquid when rotating in the damping liquid cavity 33, so that the kinetic energy of the curtain plate 13 is reduced, and the faster the curtain plate 13 descends, the greater the resistance of the damping liquid, until reaching a balanced state, the curtain plate 13 descends at a constant speed.

When the fire-proof rolling door is folded, the reel 12 rotates reversely, and the rotating shaft 21 does not rotate due to the arrangement of the one-way rotating mechanism 4, so that the curtain plate 13 can rise without being resisted by the damping mechanism 3.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. A braking device for slowing down the descending speed of a fireproof rolling door comprises a box body (11) fixed on a wall surface, a scroll (12) driven by a motor and rotationally connected with the box body (11), and a curtain plate (13) wound on the scroll (12) and fixedly connected with the scroll (12) at one end, and is characterized by also comprising a transmission mechanism (2) and a damping mechanism (3); the transmission mechanism (2) comprises a rotating shaft (21), a sun gear (22), an elliptic planetary gear (23) and an inner gear ring (24), the rotating shaft (21) is coaxially connected with the reel (12), one end, far away from the reel (12), of the rotating shaft (21) is rotatably connected with the box body (11), the sun gear (22) is coaxially and fixedly connected onto the rotating shaft (21), the elliptic planetary gear (23) is meshed with both the sun gear (22) and the inner gear ring (24), and the damping mechanism (3) is fixedly arranged on the box body (11) and is connected with the inner gear ring (24).

2. A braking device for slowing down the lowering speed of a fire rolling door according to claim 1, wherein the damping mechanism (3) comprises a plurality of springs (31) and a damper housing (32), the damper housing (32) is fixedly connected to the housing (11), one end of each spring (31) is fixedly arranged on the outer circumference of the inner gear ring (24), and the other end of each spring (31) is fixedly arranged on the inner circumference of the damper housing (32).

3. The braking device for slowing down the descending speed of a fire-proof rolling shutter door as claimed in claim 2, wherein the damper housing (32) is abutted against two end faces of the sun gear (22), the elliptic planetary gear (23) and the inner gear ring (24).

4. A braking device for slowing down the lowering speed of a fire rolling door according to claim 3, wherein the damper housing (32) and the inner gear ring (24) form a damping fluid chamber (33), and the damping fluid chamber (33) is filled with damping fluid.

5. The braking device for slowing down the descending speed of the fire-proof rolling shutter door as claimed in claim 4, wherein the upper end of the damper housing (32) is fixedly provided with a liquid inlet pipe (34), one end of the liquid inlet pipe (34) is communicated with the damping liquid cavity (33), the other end of the liquid inlet pipe (34) is communicated with the atmosphere, and one end of the liquid inlet pipe (34) communicated with the atmosphere is in threaded connection with a nut (35).

6. A braking device for slowing the descent of a fire rolling door as claimed in claim 5, characterised in that the damper housing (32) is provided with a viewing window (36) in the end face thereof.

7. The braking device for slowing down the descending speed of a fire-proof rolling shutter door as claimed in claim 5, wherein the outer periphery of the inner gear ring (24) is fixedly provided with sealing gaskets (37) which are abutted with two end surfaces of the damper shell (32) upwards.

8. The braking device for slowing down the descending speed of a fire-resistant rolling door as claimed in any one of claims 1 to 7, wherein the rotating shaft (21) is provided with a unidirectional rotating mechanism (4) which enables the rotating shaft (21) to rotate only in one direction, and the unidirectional rotating mechanism (4) is connected with the winding shaft (12).

9. The braking device for slowing down the descending speed of the fire-proof rolling door according to claim 8, wherein the unidirectional rotating mechanism (4) comprises a ratchet wheel (41), a pawl (42) and a torsion spring (43), the rotating shaft (21) is sleeved outside the winding shaft (12), the ratchet wheel (41) is arranged on the inner wall of the rotating shaft (21), the pawl (42) is hinged on the periphery of the winding shaft (12), the torsion spring (43) is sleeved on a hinged shaft of the pawl (42) and the winding shaft (12), one end of the torsion spring (43) is fixedly connected with the pawl (42), and the other end of the torsion spring (43) is fixedly connected with the winding shaft (12).

10. The braking device for slowing down the descending speed of the fire-proof rolling door as claimed in claim 9, wherein a first support (51) is arranged at one end of the winding shaft (12) close to the rotating shaft (21), a second support (52) is arranged at one end of the rotating shaft (21) close to the winding shaft (12), one end of the first support (51) is rotatably connected with the winding shaft (12), and the other end of the first support (51) is fixedly connected with the box body (11); one end of the second support (52) is rotatably connected with the rotating shaft (21), and the other end of the second support (52) is fixedly connected with the box body (11).