A new type of door hinge assembly for KFC

Abstract

The utility model discloses a novel KFC door door shaft subassembly, including door shaft spare, door shaft spare is installed at the top position of door plant, and is close to the side edge at door frame, the inside setting of door shaft spare axle pin, axle sleeve, axle sleeve is installed at the top position of door frame, and is just located the top of door shaft spare, the bottom of axle sleeve is equipped with bearing, support axle sleeve, set up the second bearing of liftable adjustment in support axle sleeve, and the inner ring upper portion of second bearing sets up the blocking structure, bottom support plate, through the screw fixed at the bottom of door frame, this door shaft subassembly is fixed through the installation hole of screw edge board in the different position close to the edge of door plant, and the installation of the size of door frame door gap of door plant is flexibly adjusted according to the need, when the rotation cooperation of axle pin and axle sleeve, the rotation of axle pin is through the ball interval non -interference adjusting screw, avoids the stable positioning of axle pin rotation interference adjusting screw, when the height adjustment of rotation adjusting screw cooperation axle pin, top axle, place the ball in the middle, can reduce the adjustment friction.

Description

Technical Field

[0001] This utility model belongs to the field of KFC door technology, specifically relating to a novel KFC door hinge assembly. Background Technology

[0002] The method of fixing the door hinge assembly of a KFC door (also known as a revolving door or heavy-duty floor spring door) is crucial because it needs to withstand the weight of the door leaf, the impact of frequent opening and closing, and external forces such as wind. It is typically fixed using expansion bolts with flanges or a fixed base.

[0003] On the ground where the door hinge will be installed, precisely drill holes or pre-drill recesses to place the floor hinge assembly. Align the mounting base of the lower door hinge with the holes in the ground, and drive in expansion bolts to tighten and secure it. The fixing principle for the top hinge is similar, but it is installed on the door frame. Align the mounting bracket of the top hinge with the holes, drive in expansion bolts, and tighten and secure it. Then connect the door leaf, with the top hinge shaft extending downwards to mate with the connector at the top of the door leaf.

[0004] An adjustment mechanism is usually also provided, which is one of the core features of KFC door hinges. The fixed base is usually not directly rigidly connected to the hinge core, but is connected through an adjustable mechanism. When adjusting the height, the ground hinge assembly usually has a built-in height adjustment bolt. By rotating this bolt, usually requiring a special Allen wrench, the entire hinge core can be raised or lowered, thereby precisely adjusting the height of the door leaf from the ground.

[0005] However, the above technical solutions have the following technical problems: 1. When installing the door hinge on the door panel, the door panel is pre-fixed with a fixing seat corresponding to the mounting hole of the door hinge, which is not conducive to flexibly adjusting the size of the door gap between the door panel and the door frame as needed; 2. The height adjustment bolt, as a rotating adjustment component, is in contact with the shaft core of the ground shaft, resulting in large adjustment friction. On the other hand, the shaft core of the ground shaft is prone to interfering with the height adjustment bolt when it rotates. Utility Model Content

[0006] This utility model provides a novel KFC door hinge assembly, which uses screws to fix the side plate at different positions near the edge of the door panel through mounting holes, allowing for flexible adjustment of the gap between the door panel and the door frame as needed. When the hinge pin and the bushing rotate and engage, the rotation of the hinge pin does not interfere with the adjusting screw through the ball bearing interval, thus avoiding the hinge pin rotation interfering with the stable positioning of the adjusting screw, thereby solving the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a novel KFC door hinge assembly, including a door hinge component, which is installed at the top of the door panel and near one edge of the door frame, for opening the door by pulling the other side;

[0008] The door hinge has an adjustable pivot pin inside, and the height of the pivot pin can be adjusted up and down.

[0009] The bushing is installed at the top of the door frame, directly above the door hinge.

[0010] The bottom of the bushing is equipped with a bearing. After the pin is inserted into the bearing, the outer wall of the pin fits perfectly with the inner ring of the bearing, allowing for flexible rotation through the engagement of the pin and the inner ring of the bearing.

[0011] The support bushing is installed on the lower edge of the door panel and is located directly below the door hinge. The support bushing is equipped with a second bearing that can be raised and lowered. The upper part of the inner ring of the second bearing is equipped with a gradually inward-retracting blocking structure.

[0012] The bottom support plate is fixed to the bottom of the door frame with screws. The bottom plate of the bottom support plate has an upward-facing top shaft. The top of the top shaft can be inserted into the second bearing and fit against the inner ring, and is blocked by the blocking structure.

[0013] Preferably, the door hinge component has a threaded cavity with a diameter larger than that of the pin inside. The door hinge component has a pin hole at the top that mates with the pin. The bottom diameter of the pin is a limiting end that fits against the inner wall of the threaded cavity. An adjusting screw located below the pin is also threadedly connected and fitted inside the threaded cavity. A ball bearing is provided between the top of the adjusting screw and the pin.

[0014] Preferably, the center of the top of the adjusting screw and the center of the bottom of the shaft pin are provided with ball grooves that cooperate with the balls.

[0015] Preferably, the second mounting hole of the second side plate of the bushing includes two elongated slots on the left and right sides.

[0016] Preferably, the support bushing has a second threaded cavity inside, and the outer wall of the second bearing is fitted inside the support bushing;

[0017] The second threaded cavity is also threadedly connected to a second adjusting screw located above the second bearing, and a second ball bearing is provided between the bottom end of the second adjusting screw and the second bearing.

[0018] Preferably, a protective shell is also fitted outside the door hinge, bushing, and support bushing, and the inner side of the protective shell has a cavity that corresponds to and fits with the door hinge, bushing, and support bushing.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] 1. Install door hinges and support bushings on the door panel. Fix the side plate at different positions near the edge of the door panel by screws through the mounting holes. This allows for adjustment of the gap between the door panel and the door frame on the opposite side, thus flexibly adjusting the size of the gap between the door panel and the door frame as needed.

[0021] 2. When the shaft pin and the bushing are in rotational engagement, the rotation of the shaft pin does not interfere with the adjusting screw through the ball bearing interval, thus avoiding the shaft pin rotation interfering with the stable positioning of the adjusting screw.

[0022] 3. When adjusting the height by rotating the adjusting screw in conjunction with the shaft pin and top shaft, placing a ball bearing in the middle can reduce adjustment friction. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the door hinge assembly installation structure of this utility model;

[0024] Figure 2 This is a front view structural diagram of the door hinge component of this utility model;

[0025] Figure 3 This is a partial cross-sectional view of the door hinge component of this utility model;

[0026] Figure 4 This is a top view of the door hinge component of this utility model;

[0027] Figure 5 This is a front view schematic diagram of the bushing structure of this utility model;

[0028] Figure 6 This is a partial cross-sectional view of the bushing structure of this utility model;

[0029] Figure 7 This is a top view schematic diagram of the bushing structure of this utility model;

[0030] Figure 8 This is a front view schematic diagram of the support bushing structure of this utility model;

[0031] Figure 9 This is a partial cross-sectional view of the support bushing of this utility model;

[0032] Figure 10 This is a top view schematic diagram of the support bushing structure of this utility model;

[0033] Figure 11 This is a front view schematic diagram of the bottom support plate structure of this utility model;

[0034] Figure 12 This is a top view of the bottom support plate structure of this utility model;

[0035] Figure 13 This is a side view of the bottom support plate structure of this utility model;

[0036] Figure 14 This is a side and top view schematic diagram of the bottom support plate of this utility model;

[0037] Figure 15This is a schematic diagram of the protective shell installation structure of this utility model;

[0038] Figure 16 This is a rear view schematic diagram of a protective shell according to the present invention.

[0039] In the diagram: 1. Door hinge; 101. Side plate; 102. Mounting hole; 103. Shaft pin; 104. Threaded cavity; 105. Adjusting screw; 106. Ball bearing; 107. Second adjusting screw; 108. Second ball bearing; 2. Door panel; 3. Door frame; 4. Bushing; 401. Second side plate; 402. Second mounting hole; 4021. Long slot hole; 403. Bearing; 5. Support bushing; 501. Second side plate; 502. Second bearing; 503. Blocking structure; 6. Bottom support plate; 601. Top shaft; 7. Protective shell; 701. Cavity. Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0041] Example 1, please refer to Figures 1-16 This utility model provides a novel KFC door hinge assembly, including a door hinge 1. The door hinge 1 is made of aluminum alloy, which is lightweight and corrosion resistant. The door hinge 1 has side plates 101 extending to both sides. The side plates 101 are preferably rectangular, which facilitates processing and makes it easier to fit and install the cover later. The door hinge 1 is installed on the top of the door panel 2 and near one edge of the door frame 3 through mounting holes 102 on the side plates 101 on both sides, so as to open the door by pulling the other side.

[0042] The door hinge 1 has an adjustable hinge pin 103 inside. The hinge pin 103 is made of stainless steel, usually 304 or higher strength / wear resistance grade. The height of the hinge pin 103 can be raised and lowered, which is used to coordinate the disassembly and height adjustment of the upper hinge assembly.

[0043] The bushing 4 is made of aluminum alloy, which is lightweight and corrosion resistant. The bushing 4 also has outwardly extending second side plates 401 on both sides. The shape of the second side plates 401 is preferably a rectangular plate. The bushing 4 is installed at the top of the door frame 3 through the second mounting holes 402 opened on the second side plates 401 on both sides, and is located directly above the door hinge 1.

[0044] The bottom of the bushing 4 is equipped with a bearing 403. The bearing 403 is installed in the groove reserved at the bottom of the bushing 4 in various ways. After interference fit, it is fixed by press fitting. If necessary, it can be fixed by welding. The bearing 403 is a needle roller bearing. After the shaft pin 103 is inserted into the bearing 403, the outer wall of the shaft pin 103 fits perfectly with the inner ring of the bearing 403. The shaft pin 103 and the inner ring of the bearing 403 cooperate to rotate flexibly.

[0045] The support bushing 5 is made of aluminum alloy, which is lightweight and corrosion resistant. The support bushing 5 is provided with an outwardly extending second side plate 501, and its fixing method is the same as that of the side plate mentioned above, which will not be described in detail. The support bushing 5 is installed on the lower edge of the door panel 2 and is located directly below the door hinge 1. The support bushing 5 is provided with a second bearing 502 that can be raised and lowered. The upper part of the inner ring of the second bearing 502 is provided with a gradually inwardly tapering blocking structure 503 for rotational support with the subsequent top shaft.

[0046] The bottom support plate 6 is made of high-strength stainless steel and includes a flat base plate and a vertical mounting plate. Multiple mounting holes are provided on both plates for fixing to the bottom of the door frame with screws. The bottom plate of the bottom support plate 6 has an upward-facing top shaft 601. The top of the top shaft 601 can be inserted into the second bearing 502 and fit against the inner ring, and is blocked by the blocking structure 503. After the support bushing 5 is installed on the bottom support plate 6, the top shaft 601 and the second bearing 502 cooperate to provide rotational support.

[0047] As an embodiment of this utility model, the door hinge 1 has a threaded cavity 104 with a diameter larger than that of the pin 103. The door hinge 1 has a pin hole at the top that mates with the pin 103. The bottom diameter of the pin 103 is a limiting end that fits against the inner wall of the threaded cavity 104, so that the pin 103 can stably rise, fall, or rotate within the threaded cavity 104. An adjusting screw 105 located below the pin 103 is also threadedly connected and fitted inside the threaded cavity 104. The adjusting screw 105 is an internal hexagon screw. A ball bearing 106 is provided between the top of the adjusting screw 105 and the pin 103. The height can be adjusted by rotating the adjusting screw 105, and the height of the pin 103 can be adjusted indirectly by the ball bearing 106. This reduces wear during the rotation adjustment process. Furthermore, when the pin 103 rotates with the bushing 4, the rotation of the pin 103 through the ball bearing 106 does not interfere with the adjusting screw 105, thus avoiding interference with the positioning of the adjusting screw 105.

[0048] As an embodiment of this utility model, the top center of the adjusting screw 105 and the bottom center of the shaft pin 103 are both provided with ball grooves that cooperate with the ball 106. By limiting the ball grooves, the ball 106 is stabilized and does not wobble.

[0049] As an embodiment of this utility model, the second mounting hole 402 of the second side plate 401 of the bushing 4 includes two long slot holes 4021 on the left and right. Since the position of the door hinge 1 is determined, the position of the bushing 4 should correspond to the door hinge 1. The initial positioning is achieved by first fixing the mounting screws in the two long slot holes 4021, then adjusting the left and right sides of the bushing 4 to determine the position and tightening the screws for positioning, and then fixing the remaining second mounting hole 402 with mounting screws, thus achieving convenient installation.

[0050] As an embodiment of the present utility model, the support bushing 5 is provided with a second threaded cavity, and the outer wall of the second bearing 502 is fitted inside the support bushing 5, so that the second bearing 502 can stably rise and fall or rotate in the second threaded cavity.

[0051] The second threaded cavity is also threadedly connected to a second adjusting screw 107 located above the second bearing 502. The second adjusting screw 107 is an internal hexagon screw. A second ball bearing 108 is provided between the bottom end of the second adjusting screw 107 and the second bearing 502. Thus, by rotating the second adjusting screw 107, the position in the second threaded cavity is adjusted, and the height position of the second bearing 502 is indirectly adjusted by the second ball bearing 108. On the one hand, this reduces wear during the rotation adjustment process. On the other hand, when the second bearing 502 is rotated and engaged with the top shaft 601, the second ball bearing 108 does not interfere with the second adjusting screw 107.

[0052] As an embodiment of this utility model, a protective shell 7 is also fitted outside the door hinge 1, bushing 4, and support bushing 5. The protective shell 7 is preferably made of hard steel and has an anti-corrosion coating on its surface. The inner side of the protective shell 7 is provided with a cavity 701 that corresponds to and fits with the door hinge 1, bushing 4, and support bushing 5, and is interference-fitted to fit outside. This enhances the aesthetics and protects the inner door hinge 1, bushing 4, and support bushing 5 from bumps and scratches.

[0053] Working principle: First, install the bottom support plate 6 at the bottom of the door frame 3, so that the top shaft 601 is exposed at a set distance. Correspondingly, install the bushing 4 at the top of the door frame 3, with the bushing 4 directly above the top shaft 601. Install the door hinge 1 and the support bushing 5 on the door panel 2. Fix the side plate 101 at different positions near the edge of the door panel 2 with screws through the mounting holes 102. This allows for adjustment of the gap between the door panel 2 and the door frame 3 on the opposite side. Correspondingly, fix the second side plate 401 at the corresponding position near the edge of the door panel 2 with screws through the second mounting holes 402. During installation, the gap between the door panel 2 and the door frame 3 can be flexibly adjusted as needed. After the door panel 2 is installed inside the door frame 3, the height of the second bearing 502 can be adjusted by adjusting the second adjusting screw 107 inside the support bushing 5, so that the second bearing 502 abuts against the top shaft 601, thereby adjusting the support height of the door panel 2. Further, the height of the shaft pin 103 is adjusted by adjusting the adjusting screw 105 inside the door shaft component 1, so that the shaft pin 103 extends to the inner ring of the bearing 403, completing the upper rotation installation. The door closer and other components are then installed.

[0054] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel KFC door hinge assembly, characterized in that, Includes a door hinge (1), which is installed at the top of the door panel (2) and near one edge of the door frame (3) for opening the door by pulling the other side; The door hinge component (1) is internally equipped with an adjustable hinge pin (103), the height of which can be adjusted up and down; The bushing (4) is installed at the top of the door frame (3) and is located directly above the door hinge (1); The bottom of the bushing (4) is fitted with a bearing (403). After the pin (103) is inserted into the bearing (403), the outer wall of the pin (103) fits perfectly with the inner ring of the bearing (403). The pin (103) and the inner ring of the bearing (403) cooperate to rotate flexibly. Support bushing (5) is installed on the lower edge of the door panel (2) and located directly below the door hinge (1). The support bushing (5) is equipped with a second bearing (502) that can be raised and lowered. The upper part of the inner ring of the second bearing (502) is equipped with a gradually inward blocking structure (503). The bottom support plate (6) is fixed to the bottom of the door frame by screws. The bottom plate of the bottom support plate (6) has an upward top shaft (601). The top of the top shaft (601) can be inserted into the interior of the second bearing (502) and fit against the inner ring, and is blocked by the blocking structure (503).

2. The novel KFC door hinge assembly according to claim 1, characterized in that, The door hinge (1) has a threaded cavity (104) with a diameter larger than that of the pin (103) inside. The door hinge (1) has a pin hole at the top that mates with the pin (103). The bottom diameter of the pin (103) is a limiting end that fits against the inner wall of the threaded cavity (104). The threaded cavity (104) is also threadedly connected to an adjusting screw (105) located below the pin (103). A ball bearing (106) is provided between the top of the adjusting screw (105) and the pin (103).

3. A novel KFC door hinge assembly according to claim 2, characterized in that, The top center of the adjusting screw (105) and the bottom center of the shaft pin (103) are both provided with ball grooves that cooperate with the ball (106).

4. A novel KFC door hinge assembly according to claim 1, characterized in that, The second mounting hole (402) of the second side plate (401) of the bushing (4) includes two long slot holes (4021) on the left and right.

5. A novel KFC door hinge assembly according to claim 1, characterized in that, The support bushing (5) has a second threaded cavity inside, and the outer wall of the second bearing (502) is fitted inside the support bushing (5); The second threaded cavity is also threadedly connected to a second adjusting screw (107) located above the second bearing (502), and a second ball (108) is provided between the bottom end of the second adjusting screw (107) and the second bearing (502).

6. A novel KFC door hinge assembly according to claim 1, characterized in that, A protective shell (7) is also fitted on the outside of the door hinge (1), bushing (4), and support bushing (5). The inner side of the protective shell (7) is provided with a cavity (701) that corresponds to and fits with the door hinge (1), bushing (4), and support bushing (5).

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