High-load-bearing door hinge

Abstract

The utility model discloses a high-load-bearing door hinge. Comprising a frame hinge body, a leaf hinge body, a frame clamping block arranged on the frame hinge body, a leaf clamping block arranged on the leaf hinge body, a shaft sleeve arranged in the leaf hinge body, a connecting shaft used for rotationally connecting the frame hinge body with the shaft sleeve, a wear-resisting part arranged between the frame hinge body and the leaf hinge body and an end cover arranged at the top of the leaf hinge body. The frame hinge is characterized in that a fastening screw for adjusting the tightness and the coaxiality of the connecting shaft is arranged on the frame hinge, and a ball bearing is adopted as the wear-resistant part. The hinge can solve the problems that the coaxiality is low due to insufficient strength of a high-load-bearing hinge, the hinge is not wear-resistant, and the hinge is incomplete after being installed, and the rotating shaft is high in coaxiality, smooth in rotation and good in wear resistance.

Description

Technical Field

[0001] The utility model relates to the technical field of hardware fittings, and particularly relates to a high-load door hinge. Background Art

[0002] During the actual use of door and window hinges, they are generally selected comprehensively according to the bearing quality of the simulated test doors and windows, the size of the door and window types, the aspect ratio of the door and window fans, etc. in the product inspection report. Among them, for general doors and windows, ordinary hinges can meet the requirements. However, when the hinge needs to hinge an opening and closing door with a load of 200-300 catties, since the current window hinges on the market have a light load-bearing capacity, most of them do not have a high load-bearing effect, and are prone to damage after long-term use, which is also not conducive to aesthetics. Although there are many door hinges on the market with a load-bearing capacity of up to 150 kg, due to the extremely high requirements for the strength of high-load hinges, many hinges may have problems such as corner dropping after installation or corner dropping due to wear after a period of use, resulting in unsmooth opening and closing. During the use process, after connecting the frame and the fan of the hinge with a traditional bushing or gasket as a wear-resistant layer, after a period of use, it is very easy to have problems such as unsmooth rotation due to wear. Summary of the Invention

[0003] In order to solve certain or some technical problems existing in the prior art, one of the purposes of this application is to provide a high-load door hinge, which can solve problems such as low coaxiality due to insufficient strength of high-load hinges and incomplete corners after installation due to non-wear resistance, with high coaxiality of the rotating shaft, smooth rotation, and good wear resistance.

[0004] To solve the above-mentioned existing technical problems, the purpose of this application is achieved by adopting the following technical solutions:

[0005] A high-load door hinge includes a frame hinge, a fan hinge, a frame clamping block arranged on the frame hinge, a fan clamping block arranged on the fan hinge, a bushing arranged inside the fan hinge, a connecting shaft for rotatably connecting the frame hinge and the bushing, a wear-resistant member arranged between the frame hinge and the fan hinge, and an end cover arranged on the top of the fan hinge. A fastening screw for adjusting the tightness and coaxiality of the connecting shaft is arranged on the frame hinge, and the wear-resistant member adopts a ball bearing.

[0006] Preferably, the connecting shaft is made of stainless steel, and a groove in contact with the tapered end of the fastening screw is provided on the connecting shaft in a circumferential manner.

[0007] Preferably, the bushing adopts a graphite nylon bushing.

[0008] Preferably, the frame hinge, the frame clamping block, the fan hinge, and the fan clamping block are all made of 6063-T6 material.

[0009] Preferably, a layer of hinge housing is sleeved on the outer sides of both the frame hinge and the sash hinge.

[0010] Preferably, a limiting groove is provided on the side wall of the mounting hole on the inner side of the sash hinge, an adjusting steel ball in contact with the limiting groove is provided on the side wall of the shaft sleeve, and an end tightening screw for locking the adjusting steel ball outward is provided at the end of the shaft sleeve.

[0011] Preferably, both the fastening screw and the end tightening screw are internal hexagonal socket head cap screws.

[0012] Preferably, a plurality of locking screws perpendicular to the mounting screws of the frame clamping block are further provided on the frame hinge, and the mounting holes of the locking screws penetrate through the connecting shaft mounting holes of the frame hinge.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] 1. The eccentricity of the rotating shaft is reduced, the coaxiality of the hinge is improved, and the hinge rotates more smoothly;

[0015] 2. The load-bearing effect of the hinge is better, and it can meet the requirements of large doors and windows in the market;

[0016] 3. The wear-resistant part of the hinge adopts a ball bearing, ensuring that the hinge has both the advantages of wear resistance and smoothness.

[0017] 4. The hinge has a decorative shell, which not only ensures the beautiful appearance of the hinge, but also reduces the contact between the hinge and the external environment, and prolongs the service life of the hinge. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is an exploded view of the present utility model;

[0019] Figure 2 is a first cross-sectional view of the present utility model, showing the positional relationship diagram of the locking screw in the top view state;

[0020] Figure 3 is a second cross-sectional view of the present utility model, showing the positional relationship diagram of the limiting groove, the adjusting steel ball and the end tightening screw;

[0021] In the figure: 1, end cap; 2, limiting groove; 3, shaft sleeve; 4, sash hinge; 5, sash clamping block; 6, hinge housing; 7, frame hinge; 8, fastening screw; 9, wear-resistant part; 10, frame clamping block; 11, locking screw; 12, groove; 13, connecting shaft; 14, adjusting steel ball; 15, end tightening screw. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Next, in combination with the accompanying drawings and specific embodiments, the present application will be further described. It should be noted that, on the premise of no conflict, the following-described embodiments or technical features can be arbitrarily combined to form new embodiments.

[0023] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0024] The terms "first", "second", etc. in the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same type, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally indicates an "or" relationship between the associated objects before and after.

[0025] As Figures 1 to 3 shown, a high-load door hinge includes a frame hinge 7, a sash hinge 4, a frame clamping block 10 provided on the frame hinge 7, a sash clamping block 5 provided on the sash hinge 4, a bushing 3 provided inside the sash hinge 4, a connecting shaft 13 for rotatably connecting the frame hinge 7 and the bushing 3, a wear-resistant member 9 provided between the frame hinge 7 and the sash hinge 4, and an end cap 1 provided on the top of the sash hinge 4. A fastening screw 8 for adjusting the tightness and coaxiality of the connecting shaft 13 is provided on the frame hinge 7, and the wear-resistant member 9 is a ball bearing.

[0026] During the installation process, the bushing 3 is installed in the installation hole inside the fan hinge 4, and both ends of the connecting shaft 13 are respectively inserted into the frame hinge 7 and the bushing 3. The frame hinge 7 and the fan hinge 4 are connected through a ball bearing. The frame hinge 7 is assembled and installed on the door frame through the frame clamping block 10, and the fan hinge 4 is assembled and installed on the door leaf through the fan clamping block 5. The connecting shaft 13 inserted into the frame hinge 7 adjusts the tightness and coaxiality through the fastening screw 8. This load-bearing door hinge changes the traditional hinge structure. By adjusting the tightness and coaxiality of the connecting shaft 13 through the fastening screw 8 on the frame hinge 7, it ensures that the connecting shaft 13 will not be eccentric, has a high coaxiality, and rotates more smoothly. And the wear-resistant part 9 of this hinge does not use an ordinary bushing 3 or gasket as the wear-resistant layer to connect the frame and fan hinges 4, but uses a ball bearing for connection. While ensuring wear resistance, it has an excellent rotation effect, making the hinge rotate more smoothly and having a longer service life. Thus, it solves the problems that the traditional wear-resistant part 9 is prone to poor rotation due to wear after a period of use, and the problem of coaxiality deviation when used as a high-load hinge.

[0027] Further improvement is that the connecting shaft 13 is made of stainless steel, and a groove 12 is provided on the connecting shaft 13 for contacting the tapered end of the fastening screw 8.

[0028] The connecting shaft 13 is made of 304 stainless steel with a diameter of not less than 10mm, having high strength and high load-bearing capacity. When the hinge is used to bear the weight and open and close a door of more than 150 kg, it will not bend or the like. And a groove 12 is provided on the connecting shaft 13. By contacting the tapered end of the fastening screw 8 through the groove 12, the groove 12 adopts a V-shaped structure, which can make the contact surface larger when the connecting shaft 13 is adjusted through the fastening screw 8.

[0029] Even further improvement is that the bushing 3 adopts a graphite nylon bushing 3; the frame hinge 7, the frame clamping block 10, the fan hinge 4 and the fan clamping block 5 are all made of 6063-T6 material.

[0030] Using a graphite nylon bushing 3, it has self-lubrication, silent opening and closing, and a load-bearing capacity of up to 150KG; the frame hinge 7, the frame clamping block 10, the fan hinge 4 and the fan clamping block 5 are all made of 6063-T6 material, having a high load-bearing capacity, convenient installation, and firm locking. When the hinge is used to bear the weight and open and close a door of more than 150 kg, it will not cause the situation of corner dropping after installation or corner dropping due to wear after using for a period of time, ensuring the smoothness of the opening and closing door.

[0031] Further improvement is that a layer of hinge housing 6 is sleeved on the outer sides of both the frame hinge 7 and the fan hinge 4.

[0032] The hinge housing 6 wraps around the arc-shaped outer sides of the frame hinge 7 and the sash hinge 4. The hinge housing 6 can not only endow it with a decorative shell, ensuring the aesthetic appearance of the hinge, but also reduce the contact between the hinge itself and the external environment, prolonging the service life of the hinge.

[0033] Further improvement is made that a limiting groove 2 is provided on the side wall of the inner mounting hole of the sash hinge 4, an adjusting steel ball 14 in contact with the limiting groove 2 is provided on the side wall of the bushing 3, and an end tightening screw 15 for locking the adjusting steel ball 14 outward is provided at the end of the bushing 3.

[0034] The bushing 3 is installed in the inner mounting hole of the sash hinge 4. During the installation process, the adjusting steel ball 14 is embedded in the hole on the side wall of the bushing 3, and the protruding part of it is embedded in the limiting groove 2. After the bushing 3 is installed in place, the end tightening screw 15 at the outer end of the bushing 3 is tightened downward. When the tapered end of the end tightening screw 15 pushes the inner side of the adjusting steel ball 14 outwards and locks it, the relative position of the bushing 3 and the sash hinge 4 is fixed. When the connecting shaft 13 is inserted into the bushing 3, the coaxiality and position stability of the bushing 3 can be ensured.

[0035] Even further improvement is made that both the fastening screw 8 and the end tightening screw 15 are internal hexagonal socket head cap screws.

[0036] When there is a deviation in the axial coaxiality of the connecting shaft 13, it can be adjusted by loosening or tightening one of the two internal hexagonal socket head cap screws to avoid jamming. Both the fastening screw 8 and the end tightening screw 15 are internal hexagonal socket head cap screws, which are more convenient for disassembly, installation and adjustment, and have better concealment.

[0037] Further improvement is made that a number of locking screws 11 perpendicular to the mounting screws of the frame clamping block 10 are also provided on the frame hinge 7, and the mounting holes of the locking screws 11 penetrate through the connecting shaft 13 mounting hole of the frame hinge 7.

[0038] When installing the hinge, in addition to forming installation and fixation between the frame hinge 7 itself and the frame clamping block 10, 3 mounting holes for the locking screws 11 are designed on the cylindrical main body of the frame hinge 7. After the mounting holes penetrate through the connecting shaft 13 mounting hole of the frame hinge 7, the insertion end of the mounting hole of the locking screw 11 is located on the outer arc-shaped convex surface of the frame hinge 7 and has a diameter larger than that of the locking screw 11, while the fastening end of the mounting hole of the locking screw 11 is located on the other side and has a diameter smaller than the tightening head of the locking screw 11, so that the locking screw 11 is more convenient for disassembly and installation. Through simultaneous fastening in two directions, the installation firmness of the frame hinge 7 can be better, and the load-bearing can be more stable. And when the connecting shaft 13 is inserted, it can also shield some or all of the locking screws 11, with better concealment.

[0039] The above embodiments are only preferred embodiments of the present application, and cannot be used to limit the scope of protection of the present application. Any non-substantial changes and substitutions made by those skilled in the art based on the present application fall within the scope of protection required by the present application.

Claims

1. A high-load door hinge, comprising a frame hinge (7), a sash hinge (4), a frame clamping block (10) provided on the frame hinge (7), a sash clamping block (5) provided on the sash hinge (4), a bush (3) provided inside the sash hinge (4), a connecting shaft (13) for rotatably connecting the frame hinge (7) and the bush (3), a wear-resistant member (9) provided between the frame hinge (7) and the sash hinge (4), and an end cap (1) provided at the top of the sash hinge (4), characterized in that: The frame hinge (7) is provided with a fastening screw (8) for adjusting the tightness and coaxiality of the connecting shaft (13), and the wear-resistant member (9) is a ball bearing.

2. The high-load door hinge according to claim 1, wherein: The connecting shaft (13) is made of stainless steel, and a groove (12) in contact with the tapered end of the fastening screw (8) is provided around the connecting shaft (13).

3. The high-load door hinge according to claim 2, characterized in that: The shaft sleeve (3) is a graphite nylon shaft sleeve (3).

4. The high-load door hinge according to claim 3, characterized in that: The frame hinge (7), the frame clamping block (10), the fan hinge (4) and the fan clamping block (5) are all made of 6063-T6 material.

5. A high-load door hinge according to any one of claims 1 to 4, characterized in that: A layer of hinge housing (6) is sleeved on the outer sides of the frame hinge (7) and the fan hinge (4).

6. A high-load door hinge according to any one of claims 1 to 4, characterized in that: A limiting groove (2) is provided on the side wall of the mounting hole on the inner side of the fan hinge (4), an adjusting steel ball (14) in contact with the limiting groove (2) is provided on the side wall of the shaft sleeve (3), and an end tightening screw (15) for locking the adjusting steel ball (14) outward is provided at the end of the shaft sleeve (3).

7. The high-load door hinge according to claim 6, characterized in that: Both the fastening screw (8) and the end tightening screw (15) are socket head cap screws with cone ends.

8. The high-load door hinge according to claim 1, characterized in that: The frame hinge (7) is further provided with a plurality of locking screws (11) perpendicular to the mounting screws of the frame clamping block (10), and the mounting holes of the locking screws (11) penetrate through the mounting hole of the connecting shaft (13) of the frame hinge (7).

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