A manual / automatic fireproof door closer

Abstract

This utility model discloses a manual / automatic integrated fireproof door closer, comprising an iron box and a housing. The housing is housed within the iron box, which contains a manual adjustment component and a brushless motor. The manual adjustment component includes a pull rod. This utility model achieves manual / automatic integrated operation through the manual adjustment component and the brushless motor. This model offers three modes: manual, semi-automatic, and fully automatic. The manual and fully automatic modes are equivalent to a regular floor spring and an automatic door opener. The semi-automatic mode provides door opening assistance, eliminates the need for oil buffering, is more environmentally friendly, and is resistant to high-temperature fire, thus possessing fireproof functionality. In the event of a fire or power outage, the door can automatically switch from spring intervention to manual mode to close the door. The brushless motor, in conjunction with the transmission and output components, drives the output shaft to rotate, and the manual adjustment component, in conjunction with the output component, further drives the output shaft to rotate, allowing the output shaft to simultaneously receive two rotational forces, resulting in improved structural stability.

Description

Technical Field

[0001] This utility model relates to the field of door closer technology, and in particular to a manual / automatic integrated fireproof door closer. Background Technology

[0002] The basic components of a hydraulic door closer include a support guide, a transmission gear, a return spring, a housing, an end cap, a sealing ring, and a connecting rod. The housing and connecting rod serve to fix the door closer and connect the door leaf and the door frame. The hydraulic door closer achieves a buffering effect by throttling the fluid in the door closer. When the door is opened, it can be compressed and released to automatically close the door, ensuring that the door is accurately and promptly closed to the initial position after being opened.

[0003] Existing hydraulic door closers rely on hydraulic fluid for buffering during actual use, which is not environmentally friendly and not heat-resistant. They also rely solely on the potential energy of the return spring to automatically close the door, and cannot close the door in time during power outages, which has certain drawbacks. To address these issues, a manual-automatic integrated fireproof door closer is proposed. Utility Model Content

[0004] In view of the shortcomings and defects in the existing technology, this utility model proposes a manual-automatic integrated fireproof door closer to solve the technical problems of existing hydraulic door closers in the background technology, which rely on oil for buffering in actual use, are not environmentally friendly, are not resistant to high temperature, and only use the potential energy of the return spring to push the door to close automatically, and cannot close the door in time in the event of power failure, which have certain drawbacks.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A manual / automatic fireproof door closer includes an iron box and a housing. The housing is housed inside the iron box. Inside the housing are a manual adjustment component and a brushless motor. The manual adjustment component contains a pull rod. The end of the pull rod away from the manual adjustment component has a pull rod connecting seat. The pull rod and the pull rod connecting seat are fixedly connected to the same spring seat tube. A first return spring is fixedly connected to the spring seat tube and is sleeved on the pull rod. The drive end of the brushless motor has a transmission component. The end of the housing away from the brushless motor is rotatably connected to an output shaft. An output component is mounted on the output shaft. The pull rod connecting seat and the transmission component are both drively connected to the output component.

[0007] Preferably, the manual adjustment assembly includes an adjustment sleeve fixedly connected to the housing, the adjustment sleeve being located on the side of the brushless motor, an adjustment rod being provided through the side wall of the housing opposite the adjustment sleeve, a spring washer being fixedly connected to one end of the adjustment sleeve near the adjustment rod, a second return spring being fixedly connected to the spring washer, the second return spring being sleeved on the pull rod, a screw plug being provided between the adjustment rod and the side wall of the housing, an O-ring being provided between the adjustment rod and the screw plug, and a bearing and a steel wire retaining ring for the shaft being provided between the screw plug and the adjustment sleeve.

[0008] Preferably, the transmission assembly includes a worm gear fixedly connected to the drive end of the brushless motor, a worm wheel assembly rotatably connected between the inner walls of the front and rear sides of the housing, the worm wheel assembly having a first transmission tooth, the worm wheel assembly being positioned near the brushless motor, the worm gear being drive-connected to the worm wheel assembly, and the first transmission tooth being drive-connected to the output assembly.

[0009] Preferably, the output assembly includes a double-tooth assembly rotatably connected between the worm gear assembly and the output shaft. An upper pull plate, a slide plate, a cam, and a second transmission gear are coaxially fixedly connected to the output shaft. The cam is disposed between the upper pull plate and the slide plate. The first transmission gear and the second transmission gear are connected in a transmission manner. A positioning pin is fixedly connected between the pull rod connecting seat and the upper pull plate. A sliding sleeve is provided between the slide plate and the upper pull plate. A needle roller is provided between the cam and the output shaft.

[0010] Preferably, the upper end of the iron box is provided with a panel, and a number of Phillips head countersunk screws are fixedly inserted between the upper end of the panel and the box body, and a number of hexagonal screws are fixedly connected between the box body and the iron box.

[0011] Preferably, the panel is provided with a dust cover at the upper end opposite to the output shaft, and the upper end of the output shaft is vertically rotatable through the panel and the dust cover.

[0012] Compared with the prior art, the advantages of this utility model are as follows:

[0013] By manually adjusting the components and brushless motor drive, a manual-automatic integrated drive is achieved. This model is divided into three modes: manual, semi-automatic, and fully automatic. The manual and fully automatic modes are equivalent to the functions of a regular floor spring and an automatic door opener, while the semi-automatic mode has a door opening assist function.

[0014] With manual adjustment components and a brushless motor drive, it eliminates the need for oil buffering, making it more environmentally friendly and resistant to high-temperature fire. It also has fireproof features. In the event of a fire or power outage for other reasons, it can automatically switch to manual mode via spring intervention to close the door.

[0015] 3. The output shaft is driven to rotate by a brushless motor in conjunction with the transmission and output components, and the output shaft is driven to rotate by a manual adjustment component in conjunction with the output components, so that the output shaft is simultaneously controlled by two rotational forces, resulting in better structural stability. Attached Figure Description

[0016] Figure 1 This is a top perspective view of a manual / automatic integrated fireproof door closer proposed in this utility model.

[0017] Figure 2 This is a side perspective view of a manual / automatic integrated fireproof door closer proposed in this utility model.

[0018] In the diagram: 1. Iron box, 2. Housing, 3. Brushless motor, 4. Pull rod, 5. Pull rod connecting seat, 6. Spring seat tube, 7. First return spring, 8. Output shaft, 9. Adjusting sleeve, 10. Adjusting rod, 11. Spring washer, 12. Second return spring, 13. Plug, 14. O-ring, 15. Bearing, 16. Wire retaining ring for shaft, 17. Worm gear, 18. Worm gear assembly, 19. First transmission gear, 20. Double gear assembly, 21. Upper pull plate, 22. Sliding plate, 23. Cam, 24. Second transmission gear, 25. Positioning pin, 26. Sliding sleeve, 27. Needle roller, 28. Panel, 29. Phillips head countersunk screw, 30. Hex bolt, 31. Dust cover. Detailed Implementation

[0019] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Reference Figure 1-2A manual / automatic integrated fireproof door closer includes an iron box 1 and a housing 2. The housing 2 is located inside the iron box 1. The housing 2 contains a manual adjustment component and a brushless motor 3. The manual adjustment component includes a pull rod 4 and an adjustment sleeve 9 fixedly connected inside the housing 2. The adjustment sleeve 9, in conjunction with an adjustment rod 10, drives the pull rod 4 to make minor adjustments and simultaneously provides a limit to the adjustment rod 10. The adjustment sleeve 9 is located on the side of the brushless motor 3. The adjustment rod 10 is inserted through the side wall of the housing 2 opposite to the adjustment sleeve 9. The end of the adjustment sleeve 9 near the adjustment rod 10 is fixedly connected to... There is a spring pad 11, and a second return spring 12 is fixedly connected to the spring pad 11. The first return spring 7 and the second return spring 12 are used for the return of the pull rod 4. The second return spring 12 is sleeved on the pull rod 4. A screw plug 13 is provided between the adjusting rod 10 and the side wall of the housing 2. An O-ring 14 is provided between the adjusting rod 10 and the screw plug 13. A bearing 15 and a shaft wire retaining ring 16 are provided between the screw plug 13 and the adjusting sleeve 9. The adjusting rod 10, in conjunction with the screw plug 13, the bearing 15, and the shaft wire retaining ring 16, drives the pull rod 4 to move and make fine adjustments under the limiting action of the adjusting sleeve 9.

[0022] A pull rod connecting seat 5 is provided at the end of the pull rod 4 away from the manual adjustment component. The same spring seat tube 6 is fixedly connected between the pull rod 4 and the pull rod connecting seat 5. A first return spring 7 is fixedly connected to the spring seat tube 6. The first return spring 7 is sleeved on the pull rod 4. A transmission component is provided at the drive end of the brushless motor 3. The transmission component includes a worm gear 17 fixedly connected to the drive end of the brushless motor 3. A worm wheel assembly 18 is rotatably connected between the inner walls of the front and rear sides of the housing 2. A first transmission tooth 19 is provided on the worm wheel assembly 18. The worm wheel assembly 18 is located on the side close to the brushless motor 3. The worm gear 17 is connected to the worm wheel assembly 18 in a transmission connection. The first transmission tooth 19 is connected to the output component in a transmission connection. The brushless motor 3 drives the worm gear 17 and the worm wheel assembly 18 to rotate, so that the first transmission tooth 19 and the second transmission tooth 24 engaged by the worm wheel assembly 18 drive the output shaft 8 to rotate.

[0023] An output shaft 8 is rotatably connected to the end of the housing 2 furthest from the brushless motor 3. An output assembly is mounted on the output shaft 8. The pull rod connecting seat 5 and the transmission assembly are both connected to the output assembly. The output assembly includes a double-gear assembly 20 rotatably connected between the worm gear assembly 18 and the output shaft 8. An upper pull plate 21, a sliding plate 22, a cam 23, and a second transmission gear 24 are coaxially and fixedly connected to the output shaft 8. The cam 23 is positioned between the upper pull plate 21 and the sliding plate 22. The first transmission gear 19 is connected to the second transmission gear 24. The pull rod connecting seat 5 is connected to the upper pull plate 21... A positioning pin 25 is fixedly connected between them. A sliding sleeve 26 is provided between the sliding plate 22 and the upper pull plate 21. A needle roller 27 is provided between the cam 23 and the output shaft 8. An external tool is used to drive the adjusting rod 10 to rotate, so that the adjusting rod 10, together with the screw plug 13, bearing 15, and shaft wire retaining ring 16, drives the pull rod 4 to move and fine adjust under the limiting action of the adjusting sleeve 9. The pull rod 4, together with the pull rod connecting seat 5, positioning pin 25, upper pull plate 21 and sliding plate 22, drives the cam 23 to rotate, so that the cam 23, together with the needle roller 27 and sliding sleeve 26, drives the output shaft 8 to rotate.

[0024] The upper end of the iron box 1 is provided with a panel 28. Several Phillips head countersunk screws 29 are fixedly inserted between the upper end of the panel 28 and the box body 2. Several hexagonal screws 30 are fixedly connected between the box body 2 and the iron box 1. Several hexagonal screws 30 are used to connect and fix the box body 2 and the iron box 1. The upper end of the panel 28 facing the output shaft 8 is provided with a dust cover 31. The upper end of the output shaft 8 is vertically rotatable through the panel 28 and the dust cover 31. The dust cover 31 is used to provide a dustproof seal between the output shaft 8 and the panel 28.

[0025] In use, this invention utilizes a brushless motor 3 to drive the worm gear 17 and worm wheel assembly 18, causing the worm wheel assembly 18 to rotate in conjunction with the first transmission gear 19 and the second transmission gear 24. An external tool drives the adjusting rod 10 to rotate, which, in conjunction with the screw plug 13, bearing 15, and shaft wire retaining ring 16, moves the pull rod 4 for fine-tuning under the limiting action of the adjusting sleeve 9. The pull rod 4, in conjunction with the pull rod connecting seat 5, positioning pin 25, upper pull plate 21, and sliding plate 22, drives the cam 23 to rotate, causing the cam 23 to engage with the needle roller 27. The sliding sleeve 26 drives the output shaft 8 to rotate. Through the manual adjustment component and the brushless motor 3, this model can be driven as a manual-automatic hybrid, with three modes: manual, semi-automatic and fully automatic. The manual and fully automatic modes are equivalent to the functions of a regular floor spring and an automatic door opener. The semi-automatic mode has a door opening assist function and does not require oil buffer, which is more environmentally friendly and resistant to high temperature fire. It has a fireproof function. When a fire occurs or the power is cut off for other reasons, it can automatically switch from spring intervention to manual mode to automatically close the door. The output shaft 8 is simultaneously controlled by two rotational forces, resulting in better structural stability.

[0026] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A manual / automatic integrated fireproof door closer, comprising an iron box (1) and a housing (2), wherein the housing (2) is disposed within the iron box (1), characterized in that, The housing (2) is equipped with a manual adjustment component and a brushless motor (3). The manual adjustment component is equipped with a pull rod (4). The end of the pull rod (4) away from the manual adjustment component is equipped with a pull rod connecting seat (5). The pull rod (4) and the pull rod connecting seat (5) are fixedly connected to the same spring seat tube (6). The spring seat tube (6) is fixedly connected to a first return spring (7). The first return spring (7) is sleeved on the pull rod (4). The drive end of the brushless motor (3) is equipped with a transmission component. The end of the housing (2) away from the brushless motor (3) is rotatably connected to an output shaft (8). The output shaft (8) is equipped with an output component. The pull rod connecting seat (5) and the transmission component are both connected to the output component in a transmission manner.

2. The manual / automatic integrated fireproof door closer according to claim 1, characterized in that, The manual adjustment assembly includes an adjustment sleeve (9) fixedly connected inside the housing (2). The adjustment sleeve (9) is located on the side of the brushless motor (3). An adjustment rod (10) is provided through the side wall of the housing (2) opposite to the adjustment sleeve (9). A spring pad (11) is fixedly connected to one end of the adjustment sleeve (9) near the adjustment rod (10). A second return spring (12) is fixedly connected to the spring pad (11). The second return spring (12) is sleeved on the pull rod (4). A screw plug (13) is provided between the adjustment rod (10) and the side wall of the housing (2). An O-ring (14) is provided between the adjustment rod (10) and the screw plug (13). A bearing (15) and a steel wire retainer (16) for the shaft are provided between the screw plug (13) and the adjustment sleeve (9).

3. The manual / automatic integrated fireproof door closer according to claim 1, characterized in that, The transmission assembly includes a worm (17) fixedly connected to the drive end of the brushless motor (3), and a worm gear assembly (18) rotatably connected between the inner walls of the front and rear sides of the housing (2). The worm gear assembly (18) is provided with a first transmission tooth (19). The worm gear assembly (18) is located near the side of the brushless motor (3). The worm (17) is connected to the worm gear assembly (18) in a transmission connection, and the first transmission tooth (19) is connected to the output assembly in a transmission connection.

4. A manual / automatic integrated fireproof door closer according to claim 3, characterized in that, The output component includes a double gear assembly (20) rotatably connected between the worm gear assembly (18) and the output shaft (8). The output shaft (8) is coaxially fixedly connected to an upper pull plate (21), a slide plate (22), a cam (23), and a second transmission gear (24). The cam (23) is disposed between the upper pull plate (21) and the slide plate (22). The first transmission gear (19) and the second transmission gear (24) are connected in a transmission manner. The tie rod connecting seat (5) is fixedly connected to the upper pull plate (21) with a positioning pin (25). A sliding sleeve (26) is provided between the slide plate (22) and the upper pull plate (21). A needle roller (27) is provided between the cam (23) and the output shaft (8).

5. A manual / automatic integrated fireproof door closer according to claim 1, characterized in that, The upper end of the iron box (1) is provided with a panel (28), and a number of cross countersunk screws (29) are fixedly inserted between the upper end of the panel (28) and the box body (2). A number of hexagonal screws (30) are fixedly connected between the box body (2) and the iron box (1).

6. A manual / automatic integrated fireproof door closer according to claim 5, characterized in that, The panel (28) is provided with a dust cover (31) at the upper end of the output shaft (8), and the upper end of the output shaft (8) is vertically rotatably connected through the panel (28) and the dust cover (31).

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