A door hinge for easy adjustment of heavy-duty door gaps

Abstract

This utility model relates to the field of fireproof doors for subway sections, and discloses a door hinge for convenient adjustment of heavy-duty door gaps, comprising: a door hinge fixedly installed on the door frame and door leaf by fixing pins; the door hinge includes a door frame mounting plate, a door leaf mounting plate, an upper core shaft, a flat bearing, a lower core shaft, an anti-loosening pin, a core cap, and a cap fastening screw; connecting columns are fixedly provided on both the upper and lower core shafts, the flat bearing is fixedly installed on the connecting columns, the core cap on one side is fixedly connected to the upper core shaft by a cap fastening screw, and the core cap on the other side is fixedly connected to the lower core shaft by a cap fastening screw, and the anti-loosening pin is threadedly installed on the door frame mounting plate. This utility model has the following advantages and effects: the door gap can be adjusted according to actual conditions without the need for complex equipment and a large amount of manpower, making assembly and installation simpler and easier, and maintenance can be completed independently, reducing maintenance costs.

Description

Technical Field

[0001] This utility model relates to the field of fireproof doors for subway sections, and in particular to a door hinge that facilitates the adjustment of the gaps in heavy-duty doors. Background Technology

[0002] To prevent deformation caused by high-frequency piston wind pressure, fire doors in subway sections utilize a steel profile structure internally. However, the weight of a single door leaf is excessive. Existing fire doors in subway sections typically use hinges or top and bottom hinges, which can cause the door leaves to sag during assembly or installation, preventing them from closing properly and necessitating adjustment of the door leaf gap. The excessive weight of the door leaves makes adjusting the gap difficult during assembly or installation, requiring multiple people and impacting assembly efficiency. Therefore, a door hinge design that facilitates easy adjustment of the gap in heavy-duty doors is needed to solve these problems.

[0003] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0004] The purpose of this invention is to provide a door hinge that facilitates the adjustment of the gaps in heavy-duty doors, thereby solving the aforementioned problems.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a door hinge for convenient adjustment of the gap in heavy-duty doors, comprising:

[0006] Door hinges are fixedly installed on the door frame and door leaf using fixing pins;

[0007] The door hinge includes a door frame mounting plate, a door leaf mounting plate, an upper spindle, a flat bearing, a lower spindle, an anti-loosening pin, a spindle cap, and a cap fastening screw;

[0008] Both the upper and lower spindles are fixedly provided with connecting columns. The plane bearing is fixedly installed on the connecting columns. The spindle cap on one side is fixedly connected to the upper spindle by the cap fastening screw, and the spindle cap on the other side is fixedly connected to the lower spindle by the cap fastening screw. The anti-loosening pin is threadedly installed on the door frame mounting plate, and the upper and lower spindles respectively abut against the corresponding anti-loosening pins.

[0009] A further feature of this invention is that the outer sides of both the upper and lower mandrels are provided with external threads, and the inner side of the door frame mounting plate is provided with internal threads, wherein the external threads are threadedly connected to the internal threads.

[0010] A further feature of this invention is that: both sides of the door leaf mounting plate are provided with receiving grooves, and two planar bearings are respectively located in the corresponding receiving grooves.

[0011] By adopting the above technical solution, a movable space is provided for the plane bearing.

[0012] A further feature of this invention is that the sides of the two planar bearings that are close to each other are in contact with the inner walls of the sides of the two receiving grooves that are close to each other.

[0013] A further feature of this invention is that multiple wrench slots are provided on both the upper and lower mandrels, and each wrench slot is equipped with a dedicated wrench.

[0014] By adopting the above technical solution, the upper and lower mandrels can be adjusted using a special wrench.

[0015] A further feature of this invention is that both the upper and lower mandrels have fastening screw grooves at their ends, and the cap fastening screws are threadedly connected to the fastening screw grooves.

[0016] A further feature of this invention is that the door frame mounting plate is fixedly installed on the door frame using fixing pins.

[0017] By adopting the above technical solution, the door frame mounting plate is fixed to the door frame.

[0018] A further feature of this invention is that the door panel mounting plate has a waist-shaped hole, and the door panel mounting plate is fixedly mounted on the door panel by fixing pins.

[0019] The beneficial effects of this utility model are:

[0020] 1. This utility model can adjust the door gap according to the actual situation, without the need for complex equipment and a lot of manpower, making assembly and installation simpler and easier, improving feasibility and reducing labor costs;

[0021] 2. After this utility model is put into use, if the door sags and cannot be opened, maintenance personnel can complete the maintenance independently without the aid of complex equipment, thus reducing maintenance costs. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of a door hinge assembly on a door frame mounting plate and a door leaf mounting plate, which facilitates the adjustment of the door gap of a heavy-duty door, as proposed in this utility model.

[0024] Figure 2This is a schematic diagram of the structure of a door hinge for conveniently adjusting the gap of a heavy-duty door, as proposed in this utility model.

[0025] Figure 3 This is an exploded structural diagram of a door hinge for conveniently adjusting the gaps in heavy-duty doors, as proposed in this utility model.

[0026] In the diagram, 1. Door frame mounting plate; 2. Door leaf mounting plate; 3. Upper spindle; 4. Surface bearing; 5. Lower spindle; 6. Anti-loosening pin; 7. Spindle cap; 8. Cap fastening screw; 9. Special wrench; 10. Door frame; 11. Door leaf. Detailed Implementation

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood through the specific circumstances.

[0028] The technical solution of this utility model will now be clearly and completely described with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0029] See Figure 1 , Figure 2 and Figure 3 This utility model provides a door hinge for conveniently adjusting the gap of heavy-duty doors, comprising:

[0030] Door hinges are fixedly installed on the door frame 10 and door leaf 11 by fixing pins;

[0031] The door hinge includes a door frame mounting plate 1, a door leaf mounting plate 2, an upper spindle 3, a surface bearing 4, a lower spindle 5, an anti-loosening pin 6, a spindle cap 7, and a cap fastening screw 8;

[0032] Both the upper spindle 3 and the lower spindle 5 are fixedly provided with connecting columns. The plane bearing 4 is fixedly installed on the connecting columns. The spindle cap 7 on one side is fixedly connected to the upper spindle 3 by the cap fastening screw 8, and the spindle cap 7 on the other side is fixedly connected to the lower spindle 5 by the cap fastening screw 8. The anti-loosening pin 6 is threaded on the door frame mounting plate 1, and the upper spindle 3 and the lower spindle 5 respectively abut against the corresponding anti-loosening pin 6.

[0033] Specifically, the outer sides of the upper spindle 3 and the lower spindle 5 are provided with external threads, and the inner side of the door frame mounting plate 1 is provided with internal threads. The external threads are connected to the internal threads. The two sides of the door leaf mounting plate 2 are provided with receiving grooves, and two flat bearings 4 are respectively located in the corresponding receiving grooves. The side of the two flat bearings 4 that is close to each other is in contact with the inner wall of the side of the two receiving grooves that is close to each other. The upper spindle 3 and the lower spindle 5 are provided with multiple wrench slots, and a special wrench 9 is provided for each of the multiple wrench slots. It should be noted that by adjusting the height of the upper spindle 3 and the lower spindle 5 by using the special wrench 9, the door leaf mounting plate 2 is moved up and down, thereby moving the door leaf 11 up and down, so as to achieve the purpose of adjusting the upper and lower door gaps.

[0034] Specifically, both the upper mandrel 3 and the lower mandrel 5 have fastening screw grooves at their ends, and the cap fastening screw 8 is threaded into the fastening screw grooves. It should be noted that the ends of the upper mandrel 3 and the lower mandrel 5 can be sealed.

[0035] Specifically, the door frame mounting plate 1 is fixedly installed on the door frame 10 by fixing pins, and the door leaf mounting plate 2 has a waist-shaped hole. The door leaf mounting plate 2 is fixedly installed on the door leaf 11 by fixing pins. It should be noted that the door leaf 11 can be adjusted horizontally during installation to adjust the left and right door gaps.

[0036] Working principle:

[0037] The principle of adjusting the door leaf mounting plate upwards is as follows: Loosen the four anti-loosening pins 6, remove the upper and lower shaft core caps 7, and rotate the upper shaft 3 counterclockwise 1 to 3 times using a special wrench 9. The upper shaft 3 can be lifted upwards by 1 to 3 mm to allow for adjustment space. The upper shaft 3 drives the plane bearing 4 connected to it to move upwards in the upper receiving groove. Rotate the lower shaft 5 clockwise 1 to 3 times using a special wrench 9. The lower shaft 5 can be lifted upwards by 1 to 3 mm. The lower shaft 5 drives the plane bearing 4 connected to it to move upwards in the lower receiving groove, which in turn drives the door leaf mounting plate 2 to move upwards by 1 to 3 mm. Tighten the four anti-loosening pins 6 and install the shaft core caps 7 to complete the adjustment of the door leaf mounting plate 2. The principle of adjusting the door leaf mounting plate 2 downwards is the same as above, thereby achieving the purpose of adjusting the upper and lower door gaps.

[0038] The principle of adjusting the left and right door leaf mounting plate: The door leaf 11 has a hole opened at the corresponding position of the door leaf mounting plate 2. During assembly, the door leaf 11 can be moved left and right by 1 to 3 mm in the waist-shaped hole of the door leaf mounting plate 2 according to the actual assembly situation. After the position is determined, a fixing pin is inserted between the door leaf mounting plate 2 and the door leaf 11 to lock and position it, thereby achieving the purpose of adjusting the left and right door gaps.

[0039] The above provides a detailed description of a door hinge for conveniently adjusting the gap of a heavy-duty door, as provided by this utility model. Specific embodiments have been used to illustrate the principle and implementation of this utility model. The descriptions of these embodiments are merely for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A door hinge for convenient adjustment of the gap in heavy-duty doors, characterized in that, include: The door hinge is fixedly installed on the door frame (10) and door leaf (11) by fixing pins; The door hinge includes a door frame mounting plate (1), a door leaf mounting plate (2), an upper spindle (3), a flat bearing (4), a lower spindle (5), an anti-loosening pin (6), a spindle cap (7), and a cap fastening screw (8); Both the upper spindle (3) and the lower spindle (5) are fixedly provided with connecting columns. The plane bearing (4) is fixedly installed on the connecting columns. The spindle cap (7) on one side is fixedly connected to the upper spindle (3) by the cap fastening screw (8). The spindle cap (7) on the other side is fixedly connected to the lower spindle (5) by the cap fastening screw (8). The anti-loosening pin (6) is threaded on the door frame mounting plate (1). The upper spindle (3) and the lower spindle (5) respectively abut against the corresponding anti-loosening pin (6).

2. A door hinge for conveniently adjusting the gap of a heavy-duty door according to claim 1, characterized in that, The outer sides of the upper mandrel (3) and the lower mandrel (5) are provided with external threads, and the inner side of the door frame mounting plate (1) is provided with internal threads. The external threads are threadedly connected to the internal threads.

3. A door hinge for conveniently adjusting the gap of a heavy-duty door according to claim 1, characterized in that, The door panel mounting plate (2) has receiving grooves on both sides, and two plane bearings (4) are located in the corresponding receiving grooves.

4. A door hinge for conveniently adjusting the gap of a heavy-duty door according to claim 3, characterized in that, The two planar bearings (4) are in contact with the inner walls of the two receiving grooves on the side that are close to each other.

5. A door hinge for conveniently adjusting the gap of a heavy-duty door according to claim 1, characterized in that, Both the upper mandrel (3) and the lower mandrel (5) are provided with multiple wrench slots, and each wrench slot is equipped with a dedicated wrench (9).

6. A door hinge for conveniently adjusting the gap of a heavy-duty door according to claim 1, characterized in that, Both the upper mandrel (3) and the lower mandrel (5) have fastening screw grooves at their ends, and the cap fastening screw (8) is threaded into the fastening screw groove.

7. A door hinge for conveniently adjusting the gap of a heavy-duty door according to claim 1, characterized in that, The door frame mounting plate (1) is fixedly installed on the door frame (10) by fixing pins.

8. A door hinge for conveniently adjusting the gap of a heavy-duty door according to claim 1, characterized in that, The door panel mounting plate (2) has a waist-shaped hole, and the door panel mounting plate (2) is fixedly installed on the door panel (11) by fixing pins.

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