Hinge for metal door

Abstract

The utility model relates to metal door technical field proposes a metal door hinge, including first hinge, second hinge and the hinge pin of first hinge and second hinge hinged, first hinge and second hinge are both single piece metal sheet folding and form double -deck structure, the hinge pin is equipped with two shaft sleeve in the hinged part with first hinge, second hinge, the bottom outside of hinge pin is connected with the nut, first hinge and second hinge are all by single piece metal sheet folding and form double -deck structure in the utility model, not multi -piece splicing, the metal sheet is bent center through the preset herringbone side groove, forms multilayer overlapping portion after folding two ends, double -deck structure and multilayer overlapping portion have improved the deformation resistance of hinge and door / door frame connecting portion greatly, single piece metal sheet integrated into one piece avoids splicing loose problem, reduces production cost simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of metal door technology, specifically to a hinge for metal doors. Background Technology

[0002] Traditional hinges are mostly composed of multiple metal sheets spliced ​​together or a single layer of solid metal plate. The joints of multiple metal sheets are prone to loosening, and long-term use can lead to door tilting due to deformation under stress. Single-layer structures, on the other hand, consume more material, increasing production costs. For example, CN208396510U discloses a metal door hinge including a frame. A first hinge is fixedly installed on the left side of the frame, and a second hinge is fixedly installed on the right side of the frame. The first and second hinges have embedded first and second fixing grooves, and are connected by a movable shaft. Utility Model Content

[0003] This utility model proposes a hinge for metal doors, which solves the problems of existing hinge technology, which consists of multiple metal sheets spliced ​​together, making them prone to loosening, or a single layer of solid metal plate structure, increasing production costs.

[0004] The technical solution of this utility model is as follows: A hinge for metal doors includes a first hinge, a second hinge, and a pin that hinges the first hinge and the second hinge. The first hinge and the second hinge are both double-layer structures formed by folding a single metal sheet. The pin has two bushings fitted at the hinge part with the first hinge and the second hinge. The bottom outer side of the pin is threaded with a nut.

[0005] Preferably, the metal sheets of the first and second hinges are symmetrically provided with two pairs of herringbone grooves on both sides. Eight positioning holes are provided at both ends of the metal sheets, symmetrical about the center of the two pairs of herringbone grooves. The metal sheets are bent around the two pairs of herringbone grooves so that the positioning holes at both ends are axially coincident. Three shaft holes and an arc groove centered on the shaft holes are provided in the middle of the metal sheets. The part between the shaft holes and the arc groove is bent outward at ninety degrees to form a shaft collar. After the metal sheets are folded around the central axis of the three shaft holes, the two ends of the metal sheets form a multi-layer overlapping part.

[0006] Preferably, the pin includes a shaft rod that can be straight through the shaft holes on three collars, one end of the shaft rod is provided with a first ball head, and the other end of the shaft rod is provided with a threaded connection part that is threaded to a nut.

[0007] Preferably, the bushing includes a sleeve, one end of which is provided with a second ball head, and both the sleeve and the second ball head are hollow structures that allow the shaft to pass through in a straight line.

[0008] Preferably, the diameters of both the first ball head and the second ball head are smaller than the diameter of the arc groove.

[0009] Preferably, the collars on the first hinge and the second hinge are stacked one on top of the other.

[0010] The beneficial effects of this utility model are as follows:

[0011] 1. In this utility model, both the first hinge and the second hinge are formed by folding a single metal sheet to form a double-layer structure, rather than splicing multiple pieces. The metal sheet is bent through a pre-set herringbone groove as the bending center. After folding, multiple overlapping parts are formed at both ends. The double-layer structure and multiple overlapping parts greatly improve the deformation resistance of the connection between the hinge and the door / door frame. The single metal sheet is integrally formed, which avoids the problem of loose splicing and reduces production costs.

[0012] 2. In this utility model, the portion between the shaft hole and the arc groove in the middle of the metal sheet is bent outward at 90° to form a shaft collar. The shaft collars of the first hinge and the second hinge are stacked one on top of the other to form a compact hinge core sleeve and a second ball head structure, which can realize the positioning of the shaft collar on the pin shaft and prevent the shaft collar from shifting up and down and affecting the stability of the metal door. Attached Figure Description

[0013] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0014] Figure 1 This is a schematic diagram of the overall structure of a metal door hinge proposed in this utility model;

[0015] Figure 2 This is a schematic diagram of the disassembly structure of a metal door hinge proposed in this utility model;

[0016] Figure 3 This is an initial state diagram of the metal sheets used in the first and second hinges proposed in this utility model.

[0017] Figure 4 This is a schematic diagram of the first hinge structure proposed in this utility model;

[0018] Figure 5 This is a schematic diagram of the pin structure proposed in this utility model;

[0019] Figure 6 This is a schematic diagram of the bushing structure proposed in this utility model;

[0020] In the diagram: 1. First hinge; 11. Herringbone groove; 12. Positioning hole; 13. Shaft hole; 14. Arc groove; 15. Multi-layer overlapping part; 16. Shaft collar; 2. Pin; 21. Shaft rod; 22. First ball head; 23. Threaded connection part; 3. Bushing; 31. Sleeve; 32. Second ball head; 4. Nut; 5. Second hinge. Detailed Implementation

[0021] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0022] Please see Figure 1 and Figure 2 This utility model provides a technical solution: a metal door hinge, including a first hinge 1, a second hinge 5, and a pin 2 that hinges the first hinge 1 and the second hinge 5. The first hinge 1 and the second hinge 5 are both double-layer structures formed by folding a single metal sheet. The pin 2 has two bushings 3 fitted at the hinge points with the first hinge 1 and the second hinge 5. A nut 4 is threaded to the bottom outer side of the pin 2. The first hinge 1 and the second hinge 5 are both formed by folding a single metal sheet to form a double-layer structure, rather than splicing multiple pieces, which improves the deformation resistance of the connection between the hinge and the door / door frame, while reducing production costs.

[0023] Please see Figure 3 and Figure 4 The first hinge 1 and the second hinge 5 have two pairs of herringbone grooves 11 symmetrically formed on both sides of their metal sheets. Eight positioning holes 12 are formed at both ends of the metal sheets, symmetrically positioned about the center of the two pairs of herringbone grooves 11. The metal sheets are bent around the two pairs of herringbone grooves 11 so that the positioning holes 12 at both ends axially coincide. Three shaft holes 13 and an arc-shaped groove 14 centered on the shaft holes 13 are formed in the middle of the metal sheets. The portion between the shaft holes 13 and the arc-shaped groove 14 is bent outward at a 90-degree angle to form a collar 16. After folding the metal sheets around the central axis of the three shaft holes 13, multiple overlapping portions 15 are formed at both ends of the metal sheets. The base materials of the first hinge 1 and the second hinge 5 are the same, the difference being that the shaft holes 13 and arc-shaped grooves 14 on the first hinge 1 are positioned at a higher height than those on the second hinge 5. The shaft hole 13 and the arc groove 14 are positioned at the correct height, allowing the collars 16 on the first hinge 1 and the second hinge 5 to be stacked vertically after installation. Both the first hinge 1 and the second hinge 5 are formed by folding a single metal sheet to create a double-layer structure, rather than splicing multiple pieces together. The metal sheet is bent through a pre-set herringbone groove 11 as the bending center, and after folding, multiple overlapping parts 15 are formed at both ends. The double-layer structure and multiple overlapping parts greatly improve the deformation resistance of the connection between the hinge and the door / door frame. Two pairs of herringbone grooves 11 are symmetrically opened on both sides of the metal sheet as bending centers to ensure symmetry on both sides during folding. Eight positioning holes 12 are symmetrical about the center of the grooves at both ends. After bending, the positioning holes are axially aligned, so that the fixing screws of the hinge and the door / door frame can be precisely aligned, avoiding installation errors.

[0024] Please see Figure 5The pin 2 includes a shaft 21, which can be straight through the shaft holes 13 on the three collars 16. One end of the shaft 21 is provided with a first ball head 22, and the other end of the shaft 21 is provided with a threaded connection part 23 that is threaded to the nut 4. The part between the shaft hole 13 in the middle of the metal sheet and the arc groove 14 is bent outward at 90° to form a collar 16. The collars of the first hinge and the second hinge are stacked one on top of the other to form a compact hinge core.

[0025] Please see Figure 6 The bushing 3 includes a sleeve 31, one end of which is provided with a second ball head 32. Both the sleeve 31 and the second ball head 32 are hollow structures that allow the shaft rod 21 to pass through in a straight line. The position design of the central shaft hole 13 and the arc groove 14 ensures the positional accuracy of the collar 16 after folding and improves the stability of the hinge. The structure of the sleeve 31 and the second ball head 32 can realize the positioning of the collar on the pin shaft and prevent the collar from moving up and down and affecting the stability of the metal door.

[0026] In a preferred embodiment, the diameters of the first ball head 22 and the second ball head 32 in this invention are both smaller than the diameter of the arc groove 14. The installation positions of the first ball head 22 and the two second ball heads 32 correspond to the three arc grooves respectively, so as not to affect the mobility of the first hinge 1 and the second hinge 5.

[0027] The working principle and usage process of this utility model are as follows: The first hinge 1, the second hinge 5, the pin 2, the bushing 3, and the nut 4 in this utility model are all standard parts. During assembly, the first hinge 1 and the second hinge 5 can be assembled as follows: Figure 2 The components are placed in the indicated position, with the collars 16 on the first hinge 1 and the second hinge 5 stacked vertically. The two bushings 3 are placed between the collars 16 on the first hinge 1 and the second hinge 5. The shaft 21 of the pin 2 is passed through the collars 16 on the first hinge 1 and the second hinge 5 and the two pins 2 from top to bottom. The nut 4 is then threaded onto the threaded connection 23 at the bottom of the shaft 21, thus completing the assembly. When disassembling, simply unscrew the nut 4 to separate the components, making it convenient to replace worn parts such as the pin 2 and bushings 3 individually, thus reducing maintenance costs.

[0028] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A hinge for a metal door, characterized by The hinge comprises a first hinge (1), a second hinge (5) and a pin shaft (2) connecting the first hinge (1) and the second hinge (5), the first hinge (1) and the second hinge (5) are both double-layer structures folded by a single piece of metal sheet, the pin shaft (2) is sleeved with two shaft sleeves (3) at the hinge connecting part of the first hinge (1) and the second hinge (5), and the bottom outer side of the pin shaft (2) is screw-connected with a nut (4).

2. The hinge for a metal door according to claim 1, wherein The metal sheet of the first hinge (1) and the second hinge (5) is symmetrically provided with two pairs of herringbone side grooves (11) at both sides, eight positioning holes (12) are provided at both ends of the metal sheet and are symmetrically arranged about the center of the two pairs of herringbone side grooves (11), the metal sheet is folded about the two pairs of herringbone side grooves (11) so that the positioning holes (12) at both ends are axially overlapped, three shaft holes (13) and an arc-shaped groove (14) are provided in the middle part of the metal sheet and are arranged about the shaft hole (13), the shaft hole (13) and the arc-shaped groove (14) are partially outwardly bent by 90 degrees to form a shaft ring (16), and the two ends of the metal sheet are formed with a plurality of overlapping parts (15) after the metal sheet is folded about the central axis of the three shaft holes (13).

3. The hinge for a metal door according to claim 2, wherein The pin shaft (2) comprises a shaft rod (21), the shaft rod (21) can be linearly penetrated by the shaft hole (13) of the three shaft rings (16), one end of the shaft rod (21) is provided with a first ball head (22), and the other end of the shaft rod (21) is provided with a threaded connection part (23) matched with the nut (4).

4. The hinge for a metal door according to claim 3, wherein The shaft sleeve (3) comprises a sleeve pipe (31), one end of the sleeve pipe (31) is provided with a second ball head (32), and the sleeve pipe (31) and the second ball head (32) are both hollow structures capable of linearly penetrating the shaft rod (21).

5. A hinge for a metal door according to claim 4, wherein The diameters of the first ball head (22) and the second ball head (32) are both smaller than the diameter of the arc-shaped groove (14).

6. The hinge for a metal door according to claim 2, wherein The shaft rings (16) on the first hinge (1) and the second hinge (5) are stacked up and down.

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