A bolt-on assembly for a metal door

Abstract

The application discloses a bolt mounting assembly for a metal door, which comprises a metal door frame, a mounting through hole and a prefabricated groove, the outer side of the metal door frame is mounted with a wall body, a metal mounting pipe is mounted through the side of the metal door frame far from the wall body, a clamping tooth is integrally fixed on the outer side of the metal mounting pipe, and the upper end of the clamping tooth is in contact with the metal door frame; a mounting through hole is formed through the lower end of the metal mounting pipe, a screw rod is arranged through the inside of the mounting through hole, an expansion pipe mounted in the wall body is arranged on the outer side of the lower end of the screw rod, and a nut located in the metal mounting pipe is arranged on the outer side of the upper end of the screw rod. The application belongs to the technical field of metal door mounting, and has the technical effects that the metal mounting pipe is clamped and fixed, welding is avoided, the convenience of installation is improved, and the problem that the metal mounting pipe is prone to welding failure after being used for a long time or being subjected to severe impact is solved.

Description

Technical Field

[0001] This application relates to the field of metal door installation technology, and more specifically to a bolt mounting assembly for metal doors. Background Technology

[0002] Metal doors are crucial for residential security. Typically made of robust metal, they feature sophisticated locking systems and anti-pry structures, effectively preventing external damage and unauthorized intrusion. Installation requires bolt-mounted components. However, because some fastener mounting surfaces on the steel plates are located inside the enclosed cavity of the metal door, operating space is limited. The industry standard solution is to pre-weld specialized mounting components during the door frame manufacturing stage. These components have precision-machined bolt holes. During on-site installation, workers use high-precision positioning to pre-assemble the door frame. Then, extended bolts are used to sequentially pass through the holes in the door frame and the pre-welded mounting components, tightening them securely. Finally, expansion bolts are used to rigidly connect the mounting components to the building wall, ensuring the stability of the door frame structure and providing convenient disassembly for future maintenance.

[0003] For example, a bolt mounting assembly and a metal door steel plate connection structure disclosed in Chinese patent publication number CN 218325638 U disclose a bolt mounting assembly that can tightly attach and connect the inner steel plate and the outer steel plate together, and is not prone to deformation.

[0004] However, most bolt-mounted assemblies currently require welding of the metal mounting tubes, making installation cumbersome. Furthermore, the welded metal mounting tubes are prone to detachment over time or under severe impact, thus reducing the overall installation effect and presenting certain defects in use. Utility Model Content

[0005] Therefore, this application provides a bolt mounting assembly for metal doors to solve the problems of cumbersome installation and the tendency of welded metal mounting tubes to detach over long periods or under severe impact, thereby reducing the overall installation effect.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] A bolt mounting assembly for a metal door includes a metal door frame, a mounting hole, and a prefabricated groove. A wall is mounted on the outer side of the metal door frame, and a metal mounting tube is installed through the metal door frame on the side away from the wall. A locking tooth is integrally fixed on the outer side of the metal mounting tube, and the upper end of the locking tooth contacts the metal door frame.

[0008] The lower end of the metal mounting tube is provided with a through hole, and a screw rod is provided inside the through hole. An expansion tube installed in the wall is provided on the outer side of the lower end of the screw rod, and a nut located inside the metal mounting tube is provided on the outer side of the upper end of the screw rod.

[0009] The upper outer side of the metal mounting tube is provided with a prefabricated groove, and a rubber component is fitted inside the prefabricated groove.

[0010] Furthermore, the upper outer edge of the metal mounting tube and the locking teeth respectively contact the two sides of the metal door frame to fix the metal mounting tube, and the locking teeth are set at an angle, and multiple sets are set at the same angle on the outer side of the metal mounting tube.

[0011] Furthermore, a dust cover is fitted onto the outer side of the upper end of the metal mounting tube.

[0012] Furthermore, a spring washer and a gasket are sequentially installed on the lower side of the nut, both located inside the metal mounting tube, and the diameter of the gasket is larger than the diameter of the mounting hole.

[0013] Furthermore, the rubber assembly includes a mounting ring, a rubber ring, and a rubber ring. The two sets of mounting rings are engaged and installed in the precast groove, and the mounting rings are fitted with rubber rings inside.

[0014] Furthermore, a rubber ring is integrally installed on the outer side of the mounting ring, and the rubber ring is in contact with the metal door frame.

[0015] Furthermore, the height of the prefabricated groove is smaller than the thickness of the metal door frame.

[0016] Compared with the prior art, this application has at least the following beneficial effects:

[0017] 1. The metal mounting tube is inserted into the metal door frame from top to bottom through the through hole. The clips are squeezed, causing an interference fit between the clips and the metal mounting tube until it is fully inserted. The outer edge of the upper end of the metal mounting tube contacts the outer side of the metal door frame. At the same time, the metal door frame loses the squeezing force on the clips, causing the clips to return to their tilted state and contact the lower side of the metal door frame. This facilitates the clamping and fixing of the metal mounting tube, achieving the purpose of welding-free installation and improving the convenience of installation. It also solves the problem that the metal mounting tube is prone to detachment from the weld after a long time or when subjected to severe impact.

[0018] 2. When the metal mounting tube is fully inserted into the metal door frame, all three sets of rubber rings are in contact with the metal door frame. At this time, the rubber rings can compensate for the gap between the metal mounting tube and the metal door frame, and at the same time, they can play an anti-slip role for the metal mounting tube, further improving the subsequent installation effect. Attached Figure Description

[0019] To more intuitively illustrate the prior art and this application, exemplary drawings are provided below. It should be understood that the specific shapes and structures shown in the drawings should not generally be regarded as limiting conditions for implementing this application; for example, based on the technical concept disclosed in this application and the exemplary drawings, those skilled in the art are capable of making conventional adjustments or further optimizations to the addition / reduction / classification of certain units, their specific shapes, positional relationships, connection methods, size ratios, etc.

[0020] Figure 1 A front cross-sectional view of a bolt mounting assembly for a metal door, provided as an embodiment of this application;

[0021] Figure 2 A schematic diagram of the overall structure of a metal mounting tube for a bolt-mounted assembly of a metal door, provided as an embodiment of this application;

[0022] Figure 3 A bolt-mounting assembly for a metal door is provided as one embodiment of this application. Figure 1 Enlarged structural diagram at point A in the middle.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Metal door frame; 2. Metal mounting tube; 3. Wall; 4. Mounting hole; 5. Clip; 6. Screw; 7. Expansion tube; 8. Gasket; 9. Nut; 10. Dust cover; 11. Precast groove; 12. Mounting ring; 13. Rubber ring; 14. Rubber ring. Detailed Implementation

[0025] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] like Figures 1 to 3 As shown, a bolt mounting assembly for a metal door according to the first aspect embodiment of this application includes: a metal door frame 1, a mounting hole 4 and a prefabricated groove 11. A wall 3 is mounted on the outer side of the metal door frame 1, and a metal mounting tube 2 is installed through the metal door frame 1 on the side away from the wall 3. A locking tooth 5 is integrally fixedly mounted on the outer side of the metal mounting tube 2, and the upper end of the locking tooth 5 is in contact with the metal door frame 1. The locking tooth 5 is inclined and multiple sets are arranged at equal angles on the outer side of the metal mounting tube 2. In the embodiment, four sets of locking teeth 5 are preferred.

[0027] The upper outer edge of the metal mounting tube 2 and the locking teeth 5 respectively contact the two sides of the metal door frame 1 to fix the metal mounting tube 2. The distance between the upper outer edge of the metal mounting tube 2 and the locking teeth 5 is adapted to the thickness of the metal door frame 1, so that the upper outer edge of the metal mounting tube 2 and the locking teeth 5 can be tightly connected to the two sides of the metal door frame 1 respectively.

[0028] The upper end of the metal door frame 1 has a through groove that matches the outer diameter of the metal mounting tube 2, facilitating the installation of the metal mounting tube 2. During installation, the metal mounting tube 2 is inserted into the metal door frame 1 from top to bottom through the through hole. The locking teeth 5 are squeezed, causing an interference fit between the locking teeth 5 and the metal door frame 1 until it is fully inserted. The outer edge of the upper end of the metal mounting tube 2 contacts the outer side of the metal door frame 1. At the same time, the metal door frame 1 loses its squeezing force on the locking teeth 5, causing the locking teeth 5 to return to their tilted state and contact the lower side of the metal door frame 1. This facilitates the clamping and fixing of the metal mounting tube 2, achieving the purpose of welding-free installation and improving the convenience of installation.

[0029] The lower end of the metal mounting tube 2 is provided with a mounting hole 4, and a screw 6 is provided inside the mounting hole 4. An expansion tube 7 installed in the wall 3 is provided on the outer side of the lower end of the screw 6, and a nut 9 located in the metal mounting tube 2 is provided on the outer side of the upper end of the screw 6.

[0030] The nut 9 has a spring washer and a gasket 8 installed sequentially on its lower side, both located inside the metal mounting tube 2. The diameter of the gasket 8 is larger than the diameter of the mounting hole 4, which facilitates the installation of the screw 6. During installation, the expansion tube 7 and the screw 6 are first inserted into the pre-drilled hole in the wall 3. Then, the metal door frame 1 is aligned and installed on the outside of the wall 3, allowing the head of the screw 6 to be inserted into the metal mounting tube 2 through the mounting hole 4. Next, the gasket 8 and the spring washer are inserted sequentially, and the nut 9 is rotated. As the nut 9 rotates, the tapered head at the bottom of the screw 6 expands the expansion tube 7, filling the entire hole. Simultaneously, the gasket 8, under the action of the nut 9, is tightly connected to the bottom of the metal mounting tube 2, achieving a secure fixation.

[0031] A dust cover 10 is fitted onto the outer side of the upper end of the metal mounting tube 2. After installation, the dust cover 10 is fitted onto the outer side of the upper end of the metal mounting tube 2, which can effectively prevent dust from entering the interior of the metal mounting tube 2.

[0032] A prefabricated groove 11 is provided on the upper outer side of the metal mounting pipe 2, and a rubber assembly is fitted inside the prefabricated groove 11. The rubber assembly includes a mounting ring 12, a rubber ring 13, and a rubber ring 14. Two sets of mounting rings 12 are fitted inside the prefabricated groove 11, and a rubber ring 13 is sleeved inside the mounting ring 12. A rubber ring 14 is integrally installed on the outer side of the mounting ring 12, and the rubber ring 14 is in contact with the metal door frame 1.

[0033] The two sets of mounting rings 12 can be inserted into the precast groove 11 from both sides. After the mounting rings 12 are inserted, the two sets of rubber rings 13 are respectively placed in the grooves opened in the mounting rings 12, so that the rubber rings 13 can fix the two sets of mounting rings 12 and prevent them from falling off.

[0034] When the metal mounting tube 2 is fully inserted into the metal door frame 1, all three sets of rubber rings 14 are in contact with the metal door frame 1. At this time, the rubber rings 14 can compensate for the gap between the metal mounting tube 2 and the metal door frame 1, and at the same time, they can play an anti-slip role for the metal mounting tube 2, further improving the subsequent installation effect.

[0035] Meanwhile, the height of the prefabricated groove 11 is smaller than the thickness of the metal door frame 1, which facilitates the concealed installation of the mounting ring 12 and improves the aesthetics of the installation.

[0036] Working principle

[0037] First, insert the metal mounting tube 2 into the metal door frame 1 from top to bottom through the through hole. The locking teeth 5 are pressed, causing an interference fit between the locking teeth 5 and the metal door frame 1 until it is fully inserted. At this point, the outer edge of the upper end of the metal mounting tube 2 contacts the outer side of the metal door frame 1, and the metal door frame 1 releases the pressure on the locking teeth 5, causing the locking teeth 5 to return to their tilted state and contact the lower side of the metal door frame 1. This facilitates the clamping and fixing of the metal mounting tube 2, achieving the purpose of welding-free installation and improving the convenience of installation.

[0038] Insert the expansion tube 7 and screw 6 into the pre-drilled holes in the wall 3, then align and install the metal door frame 1 on the outside of the wall 3, allowing the head of the screw 6 to be inserted into the metal mounting tube 2 through the mounting hole 4. Next, insert the washer 8 and spring washer in sequence, and rotate the nut 9. As the nut 9 rotates, the tapered head at the bottom of the screw 6 expands the expansion tube 7, filling the entire hole. Simultaneously, the washer 8, under the action of the nut 9, can tightly connect with the bottom of the metal mounting tube 2, thus achieving a fixing effect.

[0039] After installation, the dust cover 10 is clipped onto the upper outer side of the metal mounting tube 2, which can effectively prevent dust from entering the interior of the metal mounting tube 2.

[0040] The technical features of the above embodiments can be combined in any way (as long as there is no contradiction in the combination of these technical features). For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described; these embodiments not explicitly written should also be considered to be within the scope of this specification.

Claims

1. A bolt-mounting assembly for a metal door, comprising a metal door frame (1), a mounting hole (4), and a pre-fabricated groove (11), characterized in that, The metal door frame (1) is fitted with a wall (3) on its outer side, and a metal mounting tube (2) is installed through the metal door frame (1) on the side away from the wall (3), and a locking tooth (5) is integrally fixed on the outer side of the metal mounting tube (2), and the upper end of the locking tooth (5) is in contact with the metal door frame (1). The lower end of the metal mounting tube (2) is provided with a through hole (4), and a screw (6) is provided inside the through hole (4). An expansion tube (7) installed in the wall (3) is provided on the outer side of the lower end of the screw (6), and a nut (9) located in the metal mounting tube (2) is provided on the outer side of the upper end of the screw (6). The upper outer side of the metal mounting tube (2) is provided with a prefabricated groove (11), and a rubber component is fitted inside the prefabricated groove (11).

2. The bolt mounting assembly for a metal door according to claim 1, characterized in that, The upper outer edge of the metal mounting tube (2) and the locking teeth (5) respectively contact the two sides of the metal door frame (1) to fix the metal mounting tube (2). The locking teeth (5) are set at an angle and multiple sets are set at the same angle on the outside of the metal mounting tube (2).

3. A bolt mounting assembly for a metal door according to claim 1, characterized in that, A dust cover (10) is fitted onto the outer side of the upper end of the metal mounting tube (2).

4. A bolt mounting assembly for a metal door according to claim 1, characterized in that, The nut (9) is fitted with a spring washer and a gasket (8) in sequence inside the metal mounting tube (2), and the diameter of the gasket (8) is larger than the diameter of the mounting hole (4).

5. A bolt mounting assembly for a metal door according to claim 1, characterized in that, The rubber assembly includes a mounting ring (12), a rubber ring (13) and a rubber ring (14). Two sets of mounting rings (12) are engaged and installed in the precast groove (11), and the rubber ring (13) is sleeved inside the mounting ring (12).

6. A bolt mounting assembly for a metal door according to claim 5, characterized in that, A rubber ring (14) is integrally installed on the outer side of the mounting ring (12), and the rubber ring (14) is in contact with the metal door frame (1).

7. A bolt mounting assembly for a metal door according to claim 1, characterized in that, The height of the prefabricated groove (11) is smaller than the thickness of the metal door frame (1).

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