Load-bearing hinge for large-amplitude fireproof door

Abstract

The utility model provides a bearing hinge for a large-amplitude fireproof door, and relates to the technical field of fireproof door equipment, the bearing hinge comprises a pin shaft and two mounting plates, one ends of the two mounting plates are fixedly connected with a group of sleeves, and a limiting clamping groove is formed in each sleeve; the outer side of the pin shaft is sleeved with a loss reduction mechanism, and the outer surface wall of the loss reduction mechanism is sleeved with the two sets of sleeves. The sliding friction relation between the sleeves and the pin shaft is replaced by rolling friction force through the loss reduction mechanism, so that abrasion generated during movement of the sleeves and the pin shaft is reduced, meanwhile, the loss reduction mechanism is prevented from falling off through cooperation of a clamping block and a limiting clamping groove, and the service life of the pin shaft is prolonged. Therefore, the bearing performance of the hinge is improved, the hinge is more stable and smooth in use, meanwhile, the service life of the hinge is effectively prolonged, the stability and safety during opening and closing of the fireproof door are improved, and the actual use requirement can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of fire door equipment, in particular to a load-bearing hinge for a large-scale fire door. Background Art

[0002] Fire doors are used for fire safety. Their interiors are filled with a fireproof layer, and most of the fireproof layers are inorganic fillers, which have a considerable weight. A load-bearing hinge is a mechanical device used to connect two objects and can bear a large weight. It usually consists of two parts, connected together by a shaft, allowing the two connected objects to rotate relative to each other.

[0003] When the existing load-bearing hinges of fire doors are in use, usually by increasing the thickness of the hinge or adding the number of hinges, to improve the load-bearing performance of the hinge, prevent the load-bearing hinge from breaking during use, thereby improving the stability of the load-bearing hinge and extending its service life.

[0004] However, when the existing load-bearing hinge sleeve of the fire door and the pin shaft rub against each other, it will cause relatively large wear, and then the load-bearing capacity of the hinge will decrease. At the same time, a relatively large gap will be generated between the sleeve and the pin shaft, which will affect the stability when the fire door is opened and closed, and it is difficult to meet the actual use requirements. Summary of the Utility Model

[0005] The utility model replaces the sliding friction between the sleeve and the pin shaft with rolling friction through a wear reduction mechanism, thereby reducing the wear of the sleeve and the pin shaft, preventing the hinge from breaking, and extending its service life to solve the problems raised in the above background art.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme: a load-bearing hinge for a large-scale fire door, including a pin shaft and two mounting plates. One end of each of the two mounting plates is fixedly connected with a group of sleeves, and a limit card slot is opened inside each sleeve;

[0007] A wear reduction mechanism is sleeved on the outer side of the pin shaft, and both groups of sleeves are sleeved on the outer wall of the wear reduction mechanism;

[0008] An oil injection mechanism is arranged on the outer walls of both groups of sleeves, and a cover sealing mechanism is arranged on the tops of both mounting plates;

[0009] The wear reduction mechanism includes a limit snap ring sleeved on the outer wall of the pin shaft and four bearings. The opposite ends of every two bearings are fixedly connected with a connecting rod group. One bearing is fixedly connected with the limit snap ring through the connecting rod group. Two blocks are arranged on the outer wall of each bearing. The four bearings respectively correspond to the two groups of sleeves, and the blocks are adapted to the limit card slots.

[0010] Preferably, the oil injection mechanism includes two oil inlet pipes. One ends of the two oil inlet pipes are respectively fixedly connected to a corresponding set of sleeves. The two oil inlet pipes are fixedly connected by a connecting pipe. An oil injection pipe is fixedly connected to the outer wall of one of the oil inlet pipes. An oil injection port funnel is arranged at one end of the oil injection pipe.

[0011] Preferably, the cover sealing mechanism includes a mounting base. A fixing frame is arranged at the top of the mounting base. A limiting plate is arranged at the top of the fixing frame. A pull ring is installed at the top of the limiting plate. A movable rod is connected to the bottom of the limiting plate. One end of the movable rod movably penetrates through the fixing frame and is connected to a pressing plate. A spring is sleeved on the outer side of the movable rod. A guide rod is arranged between the mounting base and the fixing frame. A sliding frame is slidably installed on the outer side of the guide rod. The sliding frame is arranged below the pressing plate. A sealing cover is fixedly installed at the bottom of one end of the sliding frame. The sealing cover covers the top of the oil injection port funnel.

[0012] Preferably, a plurality of countersunk screw holes are formed through the surfaces of the two mounting plates. A countersunk bolt is arranged inside each countersunk screw hole.

[0013] Preferably, a limiting end cover is arranged at one end of the pin shaft. The limiting end cover is fixedly connected to the pin shaft by a bolt.

[0014] Compared with the prior art, the advantages and positive effects of the present utility model are as follows.

[0015] 1. In the present utility model, the sliding friction relationship between the sleeve and the pin shaft is replaced by rolling friction through the loss reduction mechanism, thereby reducing the wear generated when the sleeve and the pin shaft move. At the same time, the cooperation of the clamping block and the limiting card slot is used to prevent the loss reduction mechanism from falling off, thereby improving the load-bearing performance of the hinge itself, making it more stable and smooth during use, effectively extending the service life of the hinge, and enhancing the stability and safety when the fire door is opened and closed, and being able to meet the actual use requirements.

[0016] 2. In the present utility model, through the setting of the oil injection mechanism, lubricating oil can be quickly added to the loss reduction mechanism and between the sleeve and the pin shaft, thereby ensuring the smoothness of the hinge during use, slowing down the rusting speed of the hinge, effectively preventing abnormal noises from being generated when the hinge rotates, and optimizing the actual use experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional structural schematic diagram of a load-bearing hinge for a large-span fire door proposed by the present utility model;

[0018] Figure 2 is a side three-dimensional view of a load-bearing hinge for a large-span fire door proposed by the present utility model;

[0019] Figure 3The present utility model provides an exploded perspective view of a load-bearing hinge for a large-span fire door;

[0020] Figure 4 The present utility model provides an enlarged perspective view of a loss reduction mechanism of a load-bearing hinge for a large-span fire door;

[0021] Figure 5 The present utility model provides an enlarged perspective view of an oil injection mechanism of a load-bearing hinge for a large-span fire door;

[0022] Figure 6 The present utility model provides an enlarged perspective view of a cover sealing mechanism of a load-bearing hinge for a large-span fire door.

[0023] Legend: 1. mounting plate; 2. sleeve; 3. pin shaft; 4. loss reduction mechanism; 401. limit snap ring; 402. connecting rod group; 403. bearing; 404. block; 5. limit card slot; 6. oil injection mechanism; 601. inlet pipe; 602. connecting pipe; 603. oil injection pipe; 604. oil injection port funnel; 7. cover sealing mechanism; 701. mounting seat; 702. fixing frame; 703. limit plate; 704. pull ring; 705. movable rod; 706. spring; 707. guide rod; 708. pressing plate; 709. sliding frame; 710. sealing cover; 8. counterbore; 9. counterbore bolt; 10. limit end cover. Detailed implementation manners

[0024] In order to more clearly understand the above-mentioned objects, features and advantages of the present utility model, the following further describes the present utility model with reference to the drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

[0025] In the following description, many specific details are set forth to fully understand the present utility model. However, the present utility model may be implemented in other ways different from those described herein. Therefore, the present utility model is not limited by the specific embodiments disclosed in the following specification.

[0026] Please refer to Figures 1-4 , the present utility model provides a technical solution: a load-bearing hinge for a large-span fire door, including a pin shaft 3 and two mounting plates 1. One end of each of the two mounting plates 1 is fixedly connected with a set of sleeves 2. A limit card slot 5 is provided inside each sleeve 2. A loss reduction mechanism 4 is sleeved outside the pin shaft 3. The two sets of sleeves 2 are both sleeved on the outer wall of the loss reduction mechanism 4. An oil injection mechanism 6 is arranged on the outer wall of the two sets of sleeves 2. Cover sealing mechanisms 7 are arranged on the tops of the two mounting plates 1.

[0027] As Figure 3 and Figure 4As shown in the figure, the loss reduction mechanism 4 includes a limit snap ring 401 sleeved on the outer wall of the pin shaft 3 and four bearings 403. A connecting rod group 402 is fixedly connected to the opposite ends of every two bearings 403. One bearing 403 is fixedly connected to the limit snap ring 401 through the connecting rod group 402. Two clamping blocks 404 are arranged on the outer wall of each bearing 403. The four bearings 403 respectively correspond to two groups of sleeves 2. The clamping blocks 404 are adapted to the limit clamping grooves 5. By replacing the sliding friction relationship between the sleeve 2 and the pin shaft 3 with the bearing 403, it is changed into rolling friction, thereby reducing the wear degree of the sleeve 2 and the pin shaft 3. At the same time, by using the mutual cooperation of the clamping blocks 404 and the limit clamping grooves 5, the loss reduction mechanism 4 is limited and fixed on the inner side of the sleeve 2 and the outer wall of the pin shaft 3, thereby preventing the loss reduction mechanism 4 from shaking or falling off, so as to achieve the purpose of improving the operation stability of the hinge.

[0028] As Figure 3 shown, the oil injection mechanism 6 includes two oil inlet pipes 601. One ends of the two oil inlet pipes 601 are respectively fixedly connected to a corresponding group of sleeves 2. The two oil inlet pipes 601 are fixedly connected through a connecting pipe 602. An oil injection pipe 603 is fixedly connected to the outer wall of one oil inlet pipe 601. An oil injection port funnel 604 is arranged at one end of the oil injection pipe 603. Through the cooperation of the oil injection port funnel 604 and the oil injection pipe 603, the injected lubricating oil quickly flows into the sleeve 2 through the two oil inlet pipes 601, lubricates the sleeve 2, the pin shaft 3 and the loss reduction mechanism 4, thereby reducing the maintenance difficulty of the hinge, improving the overall working efficiency, prolonging the service life of the hinge, and avoiding abnormal noises.

[0029] As Figure 1 、 Figure 2 and Figure 6 shown, the cover sealing mechanism 7 includes a mounting seat 701. A fixing frame 702 is arranged on the top of the mounting seat 701. A limit plate 703 is arranged on the top of the fixing frame 702. A pull ring 704 is installed on the top of the limit plate 703. A movable rod 705 is connected to the bottom of the limit plate 703. One end of the movable rod 705 movably penetrates through the fixing frame 702 and is connected to a pressing plate 708. A spring 706 is sleeved on the outer side of the movable rod 705. A guide rod 707 is arranged between the mounting seat 701 and the fixing frame 702. A sliding frame 709 is slidably installed on the outer side of the guide rod 707. The sliding frame 709 is arranged below the pressing plate 708. A sealing cover 710 is fixedly installed at the bottom of one end of the sliding frame 709. The sealing cover 710 covers the top of the oil injection port funnel 604. Through the elasticity of the spring 706, the movable rod 705 and the pressing plate 708 are driven to press down, and then the sliding frame 709 is forced, driving the sealing cover 710 to seal the oil injection port funnel 604, so as to prevent dust from entering the oil injection mechanism 6, and can play a good protective role for the oil injection mechanism 6 and the hinge as a whole.

[0030] As Figure 2 andFigure 3 As shown in the figure, a plurality of countersunk screw holes 8 are formed through the surfaces of the two mounting plates 1. A countersunk bolt 9 is arranged inside each countersunk screw hole 8. Through the mutual cooperation of the countersunk screw holes 8 and the countersunk bolts 9, the hinge can be connected to the door frame and the fire door, and at the same time, the installation of the hinge is more beautiful.

[0031] As Figure 4 shown in the figure, a limit end cover 10 is arranged at one end of the pin shaft 3. The limit end cover 10 is fixedly connected to the pin shaft 3 through a bolt. The limit end cover 10 can limit the pin shaft 3 at one end to maintain the stability of the pin shaft 3 during use and prevent the pin shaft 3 from being misaligned or falling off.

[0032] The working principle of this embodiment: When in use, first, the loss reduction mechanism 4 is integrally sleeved outside the pin shaft 3, and the two mounting plates 1 are sleeved outside the loss reduction mechanism 4 through the sleeve 2. Then, the two mounting plates 1 are respectively attached to the door frame and the fire door, and the countersunk bolts 9 are screwed to insert them into the countersunk screw holes 8, thereby integrally installing and fixing the hinge. When in use, the original sliding friction between the sleeve 2 and the pin shaft 3 is replaced by rolling friction by using the bearing 403, thereby reducing the wear degree. Then, by pulling the pull ring 704, the movable rod 705 is prompted to drive the pressing plate 708 to slide upward and compress the spring 706 to contract. Then, the sliding frame 709 is toggled to drive the sealing cover 710 to rotate on the guide rod 707, thereby opening the oil filling port funnel 604. Finally, lubricating oil is added from the oil filling port funnel 604, and the lubricating oil flows into the sleeve 2 through the oil injection pipe 603, the connecting pipe 602 and the oil inlet pipe 601 to lubricate the bearing 403, the sleeve 2 and the pin shaft 3, thus completing the use of the load-bearing hinge for the large-scale fire door.

[0033] The above is only a preferred embodiment of the present invention, and it is not a limitation of the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A load-bearing hinge for a large-scale fire door, characterized in that: It includes a pin shaft (3) and two mounting plates (1). One end of each of the two mounting plates (1) is fixedly connected with a set of sleeves (2), and a limit card slot (5) is provided inside each sleeve (2); A loss reduction mechanism (4) is sleeved on the outer side of the pin shaft (3), and both sets of sleeves (2) are sleeved on the outer wall of the loss reduction mechanism (4); An oil injection mechanism (6) is arranged on the outer wall of both sets of sleeves (2), and a cover sealing mechanism (7) is arranged on the top of both mounting plates (1); The loss reduction mechanism (4) includes a limit snap ring (401) sleeved on the outer wall of the pin shaft (3) and four bearings (403). The opposite ends of every two bearings (403) are fixedly connected with a connecting rod group (402). One bearing (403) is fixedly connected with the limit snap ring (401) through the connecting rod group (402). Two blocks (404) are arranged on the outer wall of each bearing (403). The four bearings (403) respectively correspond to the two sets of sleeves (2), and the blocks (404) are adapted to the limit card slots (5).

2. The load-bearing hinge for a large-scale fire door according to claim 1, wherein: The oil injection mechanism (6) includes two oil inlet pipes (601). One end of each of the two oil inlet pipes (601) is fixedly connected with the corresponding set of sleeves (2). The two oil inlet pipes (601) are fixedly connected through a connecting pipe (602). An oil injection pipe (603) is fixedly connected to the outer wall of one oil inlet pipe (601), and an oil injection port funnel (604) is arranged at one end of the oil injection pipe (603).

3. The load-bearing hinge for a large-scale fire door according to claim 2, wherein: The cover sealing mechanism (7) includes a mounting seat (701). A fixing frame (702) is arranged on the top of the mounting seat (701). A limit plate (703) is arranged on the top of the fixing frame (702). A pull ring (704) is installed on the top of the limit plate (703). The bottom of the limit plate (703) is connected with a movable rod (705). One end of the movable rod (705) movably penetrates through the fixing frame (702) and is connected with a pressing plate (708). A spring (706) is sleeved on the outer side of the movable rod (705). A guide rod (707) is arranged between the mounting seat (701) and the fixing frame (702). A sliding frame (709) is slidably installed on the outer side of the guide rod (707). The sliding frame (709) is arranged below the pressing plate (708). A sealing cover (710) is fixedly installed at the bottom of one end of the sliding frame (709), and the sealing cover (710) covers the top of the oil injection port funnel (604).

4. The load-bearing hinge for a large-scale fire door according to claim 1, characterized in that: A plurality of countersunk screw holes (8) are respectively formed through the surfaces of the two mounting plates (1), and a countersunk bolt (9) is arranged inside each countersunk screw hole (8).

5. The load-bearing hinge for a large-scale fire door according to claim 1, characterized in that: A limit end cover (10) is arranged at one end of the pin shaft (3), and the limit end cover (10) is fixedly connected with the pin shaft (3) through a bolt.

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