Chain breakage protection device of fireproof rolling shutter door

Abstract

The utility model discloses a chain breakage protection device of a fireproof roller shutter door, which relates to the technical field of fireproof roller shutter doors and comprises a dust cover, a roller shutter shaft is rotatably connected to the rear side of an inner cavity of the dust cover, the front end of the roller shutter shaft penetrates through the dust cover, and a winding gear is fixedly mounted on the upper surface of the roller shutter shaft. A motor is fixedly installed on the front face of the dustproof cover, the output end of the motor penetrates through the dustproof cover and is fixedly provided with a gear, and the rear end of the output end is rotationally connected with the rear side of an inner cavity of the dustproof cover. When the chain is broken, the tensioning adjusting wheel cannot keep tensioning of the chain, the tensioning adjusting wheel moves rightwards and enables the spring to deform, under the action of elastic force of the spring, the sliding block slides rightwards to drive the locking toothed plate of the portal frame support to move rightwards, the locking toothed plate and the chain are meshed and clamped, and therefore the chain is locked, chain breaking protection is achieved, and the mechanical locking purpose is achieved. And the chain can still be subjected to chain breakage protection even in case of power failure or fire hazard power failure, so that the application range is wide.

Description

Technical Field

[0001] The utility model relates to the technical field of fireproof rolling shutter doors, in particular to a chain breaking protection device for fireproof rolling shutter doors. Background Art

[0002] Fireproof rolling shutter doors are widely used in fireproof partitions of industrial and civil buildings. They can effectively prevent the spread of fire and protect life and property. They are indispensable fire protection facilities in modern buildings. The chain break protection device is a device that can promptly stop the rotation of the chain gear when the chain breaks inside the device. It can effectively reduce a series of problems caused by chain breakage. If the chain of a traditional rolling shutter door is broken, the shutter door will drop rapidly due to its own weight, which may cause varying degrees of damage to people or objects under the door; therefore, the fireproof rolling shutter door curtains that are widely used in life are usually equipped with chain break protection devices.

[0003] For example, Chinese patent publication number CN215408404U discloses a chain break protection device for fireproof rolling shutter doors. By setting a positioning seat, electric cylinder, position sensor, etc., when the chain breaks, the position sensor captures the information, and then the control module controls the electric cylinder to contract, so that the card block leaves the card slot, and then the elastic force of the spring brings the positioning seat and the second gear closer, and the teeth on the positioning seat engage with the second gear to lock it, thereby preventing the fireproof rolling shutter door from falling due to its own gravity; through the setting of the box door, it is convenient to check and repair the equipment in the installation box when it fails; through the setting of the position sensor, control module, etc., the response time is fast, which greatly enhances the intelligence of the device; through the setting of the spring, card block, card slot, etc., it is convenient to reset the chain after it is repaired, which is convenient for reuse.

[0004] The existing technology has the following problems:

[0005] The above-mentioned chain break protection device adopts an electric cylinder and a control module to lock the second gear with the positioning seat. When a power outage or a fire occurs and the power is cut off, the control module and the electric cylinder cannot work normally and cannot lock the winding gear, making the chain break protection device ineffective. At the same time, the above-mentioned chain break protection device does not have a relevant mechanism to adjust the tension of the chain. The chain is easy to loosen during long-term use, and long-term use will accelerate the wear of the chain, thereby causing the chain to break, and the safety performance is poor. Utility Model Content

[0006] The utility model provides a chain breaking protection device for a fireproof rolling shutter door to solve the problems raised in the above background technology.

[0007] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0008] A chain breaking protection device for a fireproof rolling shutter door, comprising a dust cover, a rolling shutter shaft is rotatably connected to the rear side of the inner cavity of the dust cover, and the front end of the rolling shutter shaft passes through the dust cover, a winding gear is fixedly installed on the upper surface of the rolling shutter shaft, a motor is fixedly installed on the front side of the dust cover, the output end of the motor passes through the dust cover and is fixedly installed with a gear, and the rear end of the output end is rotatably connected to the rear side of the inner cavity of the dust cover, a chain is meshed on the side where the gear and the winding gear are separated, a tensioning adjustment component is overlapped on the left side of the inner side of the chain, a chain breaking protection component is fixedly installed on the left side of the tensioning adjustment component, an oil collecting component is fixedly installed on the bottom of the inner cavity of the dust cover, a refueling port is opened on the upper surface of the dust cover, and the oil collecting component includes an oil collecting seat, and the lower surface of the oil collecting seat is fixedly installed to the bottom wall of the inner cavity of the dust cover.

[0009] The tensioning adjustment assembly includes a tensioning adjustment wheel, the right side of the tensioning adjustment wheel overlaps with the right side of the inner side of the chain, a wheel frame is fixedly installed at the front and rear sides of the tensioning adjustment wheel, a connecting column is fixedly installed on the left side of the wheel frame, and a connecting plate is arranged on the left side of the connecting column.

[0010] The chain breaking protection assembly comprises two sliders, the opposite sides of the two sliders are respectively fixedly mounted to the front and rear sides of the outer surface of the connecting plate, and the left sides of the two sliders are fixedly mounted with a gantry.

[0011] Preferably, a sealing block is threadedly connected to the inner wall of the fuel filling port.

[0012] Preferably, a drawer passing through the left side of the dust cover is inserted into the inner cavity of the oil collecting seat, and a plurality of through holes distributed in a rectangular array are formed on the upper surface of the oil collecting seat.

[0013] Preferably, a stud is fixedly installed on the left side of the connecting column, and an internal threaded tube is rotatably installed on the right side of the connecting plate, and the inner wall of the internal threaded tube is threadedly connected to the outer surface of the stud.

[0014] Preferably, a cylindrical guide rod is fixedly installed on the rear side of the outer surface of the connecting column, and a rectangular slide groove 2 is opened on the right side of the rear side of the inner cavity of the dust cover, and the inner wall of the slide groove 2 is slidably connected to the rear side of the outer surface of the guide rod.

[0015] Preferably, a bracket is fixedly installed on the left side of the inner side of the gantry, and a locking tooth plate is fixedly installed on the lower part of the right side of the bracket, and the right side of the locking tooth plate is engaged with the left side of the chain.

[0016] Preferably, a slide groove 1 is provided at the left side of the front and rear sides of the inner cavity of the dust cover, the inner walls of the two slide grooves 1 are slidably connected to the side where the two sliders are separated, and the two gantries and sliders are both T-shaped.

[0017] Preferably, a spring is fixedly connected to one opposite side of the two sliding blocks and the two sliding grooves.

[0018] Due to the adoption of the above technical solution, the utility model has achieved the following technical progress compared with the prior art:

[0019] 1. The utility model provides a chain breaking protection device for a fireproof rolling shutter door. The distance between the internal threaded tube and the wheel frame is adjusted by rotating the internal threaded tube, and the guide rod is guided by a slide groove to make the tensioning adjustment wheel and the wheel frame connecting column stud move along the right side of the dust cover, so that the tensioning adjustment wheel presses the chain to the right, thereby achieving the purpose of adjusting the tension of the chain, protecting the chain, reducing the possibility of chain breakage, and improving safety. Lubricating oil is added to the chain through the refueling port, thereby reducing the wear of the chain and extending its service life. At the same time, during the refueling and chain movement process, excess oil falls into the oil collecting seat and enters the drawer through the through hole for collection, thereby ensuring the cleanliness of the inside of the dust cover.

[0020] 2. The utility model provides a chain breaking protection device for a fireproof rolling shutter door. When the chain breaks, the tensioning adjusting wheel cannot keep the chain tensioned, and the tensioning adjusting wheel moves to the right and causes the spring to deform. Under the elastic force of the spring, the slider slides to the right, driving the locking tooth plate of the gantry bracket to move to the right, so that the locking tooth plate engages with the chain and gets stuck, thereby locking the chain to achieve chain breaking protection and realize the purpose of mechanical locking. Even in the event of a power outage or a fire, the chain can still be protected from chain breaking, and the utility model has a wide range of uses. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the utility model;

[0022] Figure 2 It is a partial cross-sectional structural schematic diagram of the dust cover of the utility model;

[0023] Figure 3 It is a schematic diagram of the enlarged structure of B of the utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the tension adjustment component of the utility model;

[0025] Figure 5 This is a schematic diagram of the structure of the oil collecting assembly of the utility model;

[0026] Figure 6 It is a cross-sectional structural schematic diagram of the utility model;

[0027] Figure 7 It is a schematic diagram of the enlarged structure of point A of the utility model;

[0028] Figure 8 This is a schematic diagram of the chain breaking protection component and the tensioning adjustment wheel structure of the utility model;

[0029] Fig. 9 This is a schematic diagram of the chain break protection component structure of the utility model.

[0030] In the figure: 1. dust cover; 11. oil filling port; 12. slideway 1; 13. slideway 2; 14. sealing block; 2. motor; 21. gear; 3. roller blind shaft; 31. winding gear; 4. chain; 5. chain break protection assembly; 51. slider; 52. gantry; 53. bracket; 54. locking gear plate; 55. spring; 6. tension adjustment assembly; 61. tension adjustment wheel; 62. wheel frame; 63. connecting column; 631. guide rod; 64. stud; 65. internal threaded pipe; 66. connecting plate; 7. oil collecting assembly; 71. oil collecting seat; 72. drawer; 73. through hole. DETAILED DESCRIPTION

[0031] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0032] like Figure 1-Figure 9 As shown, a chain breaking protection device for a fireproof rolling shutter door comprises a dust cover 1, a rolling shutter shaft 3 is rotatably connected to the rear side of the inner cavity of the dust cover 1, and the front end of the rolling shutter shaft 3 passes through the dust cover 1, a winding gear 31 is fixedly installed on the upper surface of the rolling shutter shaft 3, a motor 2 is fixedly installed on the front side of the dust cover 1, an output end of the motor 2 passes through the dust cover 1 and is fixedly installed with a gear 21, and the rear end of the output end is rotatably connected to the rear side of the inner cavity of the dust cover 1, a chain 4 is meshed on the side where the gear 21 and the winding gear 31 are separated, a tensioning adjustment component 6 is overlapped on the left side of the inner side of the chain 4 to adjust the tensioning force of the chain 4, and a chain breaking protection component 5 is fixedly installed on the left side of the tensioning adjustment component 6 to realize the chain breaking protection of the chain 4, and the chain 4 can still be protected from chain breaking even in the event of a power outage or a fire power outage, and the use range is wide, and the inner cavity of the dust cover 1 An oil collecting assembly 7 is fixedly installed at the bottom to collect excess lubricating oil during refueling and chain 4 movement to ensure the cleanliness of the inside of the dust cover 1. A refueling port 11 is provided on the upper surface of the dust cover 1. The oil collecting assembly 7 includes an oil collecting seat 71. The lower surface of the oil collecting seat 71 is fixedly installed to the bottom wall of the inner cavity of the dust cover 1. The tensioning adjustment assembly 6 includes a tensioning adjustment wheel 61. The right side of the tensioning adjustment wheel 61 overlaps the right side of the inner side of the chain 4. A wheel frame 62 is fixedly installed at the front and rear sides of the tensioning adjustment wheel 61. A connecting column 63 is fixedly installed on the left side of the wheel frame 62. A connecting plate 66 is arranged on the left side of the connecting column 63. The chain breaking protection assembly 5 includes two sliders 51. The opposite sides of the two sliders 51 are respectively fixedly installed to the front and rear sides of the outer surface of the connecting plate 66, and a gantry 52 is fixedly installed on the left side of the two sliders 51.

[0033] Connect the front end of the rolling shutter shaft 3 to the fireproof rolling shutter door, power on the motor 2, and use the motor 2, gear 21, rolling shutter shaft 3, winding gear 31, and chain 4 to retract and unwind the fireproof rolling shutter door. By adjusting the distance between the tensioning adjustment wheel 61 and the connecting plate 66, and making the tensioning adjustment wheel 61 press the chain 4 to the right, the purpose of adjusting the tension of the chain 4 is achieved, the chain 4 is protected, the possibility of chain 4 breakage is reduced, and safety is improved. Lubricating oil is added to the chain 4 through the refueling port 11 to reduce the chain 4. At the same time, during the refueling and chain 4 movement process, excess oil falls into the oil collecting seat 71 to ensure the cleanliness of the inside of the dust cover 1. When the chain 4 breaks, the tensioning adjustment wheel 61 cannot keep the chain 4 tensioned, and the tensioning adjustment wheel 61 moves right and drives the chain breaking protection component 5 to move right and engage with the chain 4, thereby locking the chain 4 to achieve chain breaking protection and realize the purpose of mechanical locking. Even in the event of a power outage or a fire power outage, the chain 4 can still be protected from chain breaking.

[0034] like Figure 1 , Figure 5 , Figure 6 As shown, the inner wall of the refueling port 11 is threadedly connected with a sealing block 14, the inner cavity of the oil collecting seat 71 is plugged with a drawer 72 passing through the left side of the dust cover 1, and the upper surface of the oil collecting seat 71 is provided with a plurality of through holes 73 distributed in a rectangular array.

[0035] Lubricating oil is added to the chain 4 through the refueling port 11 to reduce the wear of the chain 4 and extend its service life. After refueling is completed, the sealing block 14 is rotated to seal the refueling port 11. At the same time, during refueling and the movement of the chain 4, excess oil falls into the oil collecting seat 71 and enters the drawer 72 through the through hole 73 for collection, thereby ensuring the cleanliness of the inside of the dust cover 1.

[0036] like Figure 2-Figure 4 , Figure 6 , Figure 8 As shown, a stud 64 is fixedly installed on the left side of the connecting column 63, and an internal threaded tube 65 is rotatably installed on the right side of the connecting plate 66. The inner wall of the internal threaded tube 65 is threadedly connected to the outer surface of the stud 64, and a cylindrical guide rod 631 is fixedly installed on the rear side of the outer surface of the connecting column 63. A rectangular slide groove 13 is opened on the right side of the rear side of the inner cavity of the dust cover 1, and the inner wall of the slide groove 13 is slidably connected to the rear side of the outer surface of the guide rod 631.

[0037] By rotating the internal threaded tube 65 to adjust the distance between the internal threaded tube 65 and the wheel frame 62, and using the slide groove 12 to guide the guide rod 631, the tensioning adjustment wheel 61, the wheel frame 62, the connecting column 63, and the stud 64 are moved along the right side of the dust cover 1, so that the tensioning adjustment wheel 61 presses against the chain 4 to the right, thereby achieving the purpose of adjusting the tension of the chain 4, protecting the chain 4, reducing the possibility of chain 4 breakage, and improving safety.

[0038] like Figure 7-Figure 9 As shown, a bracket 53 is fixedly installed on the left side of the inner side of the gantry 52, and a locking tooth plate 54 is fixedly installed on the lower part of the right side of the bracket 53. The right side of the locking tooth plate 54 is engaged with the left side of the chain 4. Slide grooves 12 are opened on the left sides of the front and rear sides of the inner cavity of the dust cover 1. The inner walls of the two slide grooves 12 are slidably connected to the side where the two sliders 51 are separated. The two gantries 52 and the sliders 51 are both T-shaped, and a spring 55 is fixedly connected to the side opposite to the two sliders 51 and the two slide grooves 12.

[0039] The spring 55 provides a pulling force to the slider 51. When the chain 4 is not broken, the spring 55 is in the initial state, the bracket 53 and the locking tooth plate 54 are located on the left side of the chain 4, and the locking tooth plate 54 is not engaged with the chain 4. When the chain 4 is broken, the tensioning adjustment wheel 61 cannot keep the chain 4 tensioned. The tensioning adjustment wheel 61 moves right and causes the spring 55 to deform. Under the elastic force of the spring 55, the slide groove 12 is used to guide the slider 51, so that the slider 51 slides right along the slide groove 12, driving the gantry 52, the bracket 53, and the locking tooth plate 54 to move right, so that the locking tooth plate 54 is engaged with the chain 4 and stuck, thereby locking the chain 4 to achieve chain break protection and realize the purpose of mechanical locking. Even in the event of a power outage or a fire, the chain 4 can still be protected from chain breakage.

[0040] Working principle of the present invention: when in use, connect the front end of the rolling shutter shaft 3 to the fireproof rolling shutter door, energize the motor 2, and use the motor 2, gear 21, rolling shutter shaft 3, winding gear 31, and chain 4 to retract and unwind the fireproof rolling shutter door. When the chain 4 is not broken, the spring 55 is in the initial state, the bracket 53 and the locking tooth plate 54 are located on the left side of the chain 4, and the locking tooth plate 54 is not engaged with the chain 4. Lubricating oil is added to the chain 4 through the refueling port 11 to reduce the wear of the chain 4 and extend its service life. At the same time, during the refueling and movement of the chain 4, excess oil falls into the oil collecting seat 71 and enters the drawer 72 through the through hole 73 for collection, ensuring the cleanliness of the inside of the dust cover 1. The tensioning adjustment wheel 61 is adjusted through the internal threaded tube 65, the connecting column 63, and the stud 64 The spacing between the tensioner and the connecting plate 66 is adjusted, and the tensioning adjustment wheel 61 is pressed against the chain 4 to the right, so as to adjust the tension of the chain 4, protect the chain 4, reduce the possibility of chain 4 breaking, and improve safety. When the chain 4 breaks, the tensioning adjustment wheel 61 cannot keep the chain 4 tensioned, and the tensioning adjustment wheel 61 moves to the right and causes the spring 55 to deform. Under the elastic force of the spring 55, the slide groove 12 is used to guide the slider 51, so that the slider 51 slides right along the slide groove 12, drives the gantry 52, the bracket 53, and the locking tooth plate 54 to move right, so that the locking tooth plate 54 is engaged and stuck with the chain 4, thereby locking the chain 4, achieving chain breaking protection, and realizing the purpose of mechanical locking. Even in the event of a power outage or a fire, the chain 4 can still be protected from chain breaking.

[0041] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not deviate from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A chain breaking protection device for a fireproof rolling shutter door, comprising a dust cover (1), characterized in that: The rear side of the inner cavity of the dust cover (1) is rotatably connected to a rolling curtain shaft (3), and the front end of the rolling curtain shaft (3) passes through the dust cover (1). A winding gear (31) is fixedly mounted on the upper surface of the rolling curtain shaft (3). A motor (2) is fixedly mounted on the front side of the dust cover (1). The output end of the motor (2) passes through the dust cover (1) and is fixedly mounted with a gear (21), and the rear end of the output end is rotatably connected to the rear side of the inner cavity of the dust cover (1). The gear (21) and the winding gear (31) are connected to each other. A chain (4) is meshed with one side of the dust cover (1), a tension adjustment component (6) is overlapped on the left side of the inner side of the chain (4), a chain break protection component (5) is fixedly installed on the left side of the tension adjustment component (6), an oil collection component (7) is fixedly installed at the bottom of the inner cavity of the dust cover (1), a refueling port (11) is provided on the upper surface of the dust cover (1), and the oil collection component (7) includes an oil collection seat (71), and the lower surface of the oil collection seat (71) is fixedly installed on the bottom wall of the inner cavity of the dust cover (1); The tension adjustment assembly (6) comprises a tension adjustment wheel (61), the right side of the tension adjustment wheel (61) overlaps the right side of the inner side of the chain (4), a wheel frame (62) is fixedly installed at the front and rear sides of the tension adjustment wheel (61), a connecting column (63) is fixedly installed at the left side of the wheel frame (62), and a connecting plate (66) is arranged on the left side of the connecting column (63); The chain breaking protection assembly (5) comprises two sliders (51), the opposite sides of the two sliders (51) are fixedly mounted to the front and rear sides of the outer surface of the connecting plate (66), and the left sides of the two sliders (51) are fixedly mounted with a gantry (52).

2. A chain breaking protection device for a fireproof rolling shutter door according to claim 1, characterized in that: The inner wall of the refueling port (11) is threadedly connected with a sealing block (14).

3. The chain breaking protection device for a fireproof rolling shutter door according to claim 1, characterized in that: The inner cavity of the oil collecting seat (71) is plugged with a drawer (72) passing through the left side of the dust cover (1), and the upper surface of the oil collecting seat (71) is provided with a plurality of through holes (73) distributed in a rectangular array.

4. The chain breaking protection device for a fireproof rolling shutter door according to claim 1, characterized in that: A stud (64) is fixedly mounted on the left side of the connecting column (63), and an internal threaded tube (65) is rotatably mounted on the right side of the connecting plate (66), wherein the inner wall of the internal threaded tube (65) is threadedly connected to the outer surface of the stud (64).

5. The chain breaking protection device for a fireproof rolling shutter door according to claim 1, characterized in that: A cylindrical guide rod (631) is fixedly mounted on the rear side of the outer surface of the connecting column (63), and a rectangular slide groove 2 (13) is provided on the right side of the rear side of the inner cavity of the dust cover (1), and the inner wall of the slide groove 2 (13) is slidably connected to the rear side of the outer surface of the guide rod (631).

6. A chain breaking protection device for a fireproof rolling shutter door according to claim 1, characterized in that: A bracket (53) is fixedly installed on the left side of the inner side of the gantry (52), and a locking tooth plate (54) is fixedly installed on the lower part of the right side of the bracket (53), and the right side of the locking tooth plate (54) is meshed with the left side of the chain (4).

7. A chain breaking protection device for a fireproof rolling shutter door according to claim 1, characterized in that: The dust cover (1) is provided with a slide groove (12) at the left side of the front and rear sides of the inner cavity, and the inner walls of the two slide grooves (12) are slidably connected to the separated sides of the two sliders (51), and the two gantries (52) and the sliders (51) are both in a T shape.

8. A chain breaking protection device for a fireproof rolling shutter door according to claim 7, characterized in that: A spring (55) is fixedly connected to the two sliding blocks (51) and the side opposite to the two sliding grooves (12).

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