Low noise fire door hinge arrangement

Abstract

The utility model discloses a low -noise fire door hinge device, including first hinge piece, one side of first hinge piece has two first connecting parts, second hinge piece, one side of second hinge piece has second connecting part, and second connecting part is placed between two first connecting parts, POM axle sleeve subassembly, POM axle sleeve subassembly is located the junction of first connecting part and second connecting part, axle center, axle center passes through POM axle sleeve subassembly, to make first hinge piece and second hinge piece relative rotation around axle center. The axle center in this hinge device passes through and sets up the structural design of POM axle sleeve subassembly between the first connecting part on the first hinge piece and the second connecting part on the second hinge piece, can prevent the first connecting part and the second connecting part in the process of opening and closing and directly rub, utilize the good lubricity and wear resistance of POM material, make the device in the process of opening and closing can not produce the noise, and then promote the service life of hinge device.

Description

Technical Field

[0001] This utility model belongs to the field of hardware accessories technology, specifically relating to a low-noise fire door hinge device. Background Technology

[0002] In conventional hinges, the shaft is typically inserted into a pivot hole for rotation. The shaft and the inner wall of the pivot hole have a clearance fit. Friction occurs between the shaft and the pivot hole as the hinge rotates. Currently, to eliminate this friction and extend the hinge's lifespan, lubricating oil is added to the shaft before insertion into the pivot hole. The lubricating oil's properties seem to eliminate friction. However, adding lubricating oil is an auxiliary method; it only eliminates friction generated during hinge rotation. Hinges themselves do not inherently possess friction-reducing properties. Excessive lubricating oil or grease can overflow, affecting the cleanliness of the hinge and door. Forgetting to add lubricating oil or grease can cause metal powder to fall from the shaft, generating noise and wear, ultimately reducing the hinge's lifespan. Utility Model Content

[0003] In order to solve the above-mentioned problems in the existing technology, the purpose of this utility model is to provide a low-noise fire door hinge device.

[0004] The technical solution adopted in this utility model is as follows:

[0005] A low-noise fire door hinge device includes a first hinge piece with two first connecting portions on one side; a second hinge piece with a second connecting portion on one side, the second connecting portion being positioned between the two first connecting portions; a POM bushing assembly located at the connection between the first connecting portions and the second connecting portions; and a shaft passing through the POM bushing assembly to allow the first and second hinge pieces to rotate relative to each other around the shaft.

[0006] For example, the POM bushing assembly includes a first bushing and a second bushing, with the first bushing disposed at a first connecting portion and the second bushing disposed at a second connecting portion.

[0007] For example, it also includes an adjustment component, which is located at the second connection portion and connected to the shaft, to adjust the shaft relative to the POM bushing assembly to switch between a first position and a second position.

[0008] For example, the shaft is located in the first position, and the entire shaft is located inside the first bushing.

[0009] For example, the shaft is located in the second position, with a portion of the shaft inside the first bushing and another portion inside the second bushing.

[0010] For example, the adjustment assembly includes a rotating body rotatably connected to the second connection portion, the rotating body having a receiving cavity and an internal thread provided in the receiving cavity;

[0011] The shaft is slidably connected to the second connection part, and part of its outer wall is provided with external threads, which are engaged with internal threads.

[0012] For example, it also includes a limiting component disposed between the second hinge piece and the adjusting component.

[0013] For example, the limiting component includes a limiting pin and a countersunk hole, the countersunk hole is placed on the rotating body, the limiting pin is slidably disposed on the second hinge piece, and an elastic element is provided between the limiting pin and the second hinge piece.

[0014] The beneficial effects of this utility model are as follows:

[0015] The hinge device features a shaft that passes through a POM bushing assembly placed between the first connecting part on the first hinge plate and the second connecting part on the second hinge plate. This design prevents direct friction between the first and second connecting parts during opening and closing. Utilizing the excellent lubricity and wear resistance of POM material, the device operates without noise during opening and closing, allowing it to achieve good relative rotation performance without the need for lubricating oil or grease, thereby extending the service life of the hinge device. Attached Figure Description

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and specific implementation methods.

[0017] Figure 1 This is a schematic diagram of the overall axial side structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the overall front structure of this utility model;

[0019] Figure 3 yes Figure 2 Enlarged structural diagram at point A;

[0020] Figure 4 This is a schematic diagram of the structure of the axis of this utility model in the first position;

[0021] Figure 5 This is a schematic diagram of the structure of the present invention with the shaft in the second position.

[0022] In the figure: 100-first hinge piece, 110-first connecting part, 200-second hinge piece, 210-second connecting part, 300-POM bushing assembly, 310-first bushing, 320-second bushing, 400-shaft, 500-adjusting assembly, 510-rotating body, 520-accommodating cavity, 600-limiting assembly, 610-limiting pin, 620-counterhole, 630-elastic element. Detailed Implementation

[0023] In the following description, numerous details are provided to enable a thorough understanding of this application. However, those skilled in the art will appreciate that the following description merely illustrates preferred embodiments of the application, and that the application can be implemented without one or more of these details. Furthermore, to avoid confusion with this application, some technical features well-known in the art have not been described in detail.

[0024] To fully understand the embodiments of this application, detailed structures will be presented in the following description. Obviously, the implementation of the embodiments of this application is not limited to the specific details familiar to those skilled in the art. The preferred embodiments of this application are described in detail below; however, in addition to these detailed descriptions, this application may have other embodiments.

[0025] See also Figures 1 to 5 This application provides a low-noise fire door hinge device, including a first hinge piece 100, one side of which has two first connecting portions 110; a second hinge piece 200, one side of which has a second connecting portion 210, which is located between the two first connecting portions 110; a POM bushing assembly 300, which is located at the connection between the first connecting portion 110 and the second connecting portion 210; and a shaft 400, which passes through the POM bushing assembly 300 to allow the first hinge piece 100 and the second hinge piece 200 to rotate relative to each other around the shaft 400.

[0026] The hinge device features a shaft 400 that passes through a POM bushing assembly 300 located between the first connecting portion 110 on the first hinge piece 100 and the second connecting portion 210 on the second hinge piece 200. This design prevents direct friction between the first connecting portion 110 and the second connecting portion 210 during opening and closing. The excellent lubricity and wear resistance of POM material ensures that the device operates without noise during opening and closing, allowing it to achieve good relative rotation performance without the need for lubricating oil or grease, thereby extending the lifespan of the hinge device.

[0027] See also Figures 1 to 5In some embodiments, the POM bushing assembly 300 includes a first bushing 310 and a second bushing 320, with the first bushing 310 disposed on the first connecting portion 110 and the second bushing 320 disposed on the second connecting portion 210.

[0028] By adding a first bushing 310 and a second bushing 320 between the shaft 400 and the first connecting part 110 and the second connecting part 210, and by utilizing the good lubricity and wear resistance of the POM material, the rotation performance of the shaft 400 is improved and the service life of the hinge device is increased.

[0029] See also Figures 4 to 5 In some embodiments, an adjustment component 500 is also included, which is located at the second connection portion 210 and connected to the shaft 400 to adjust the shaft 400 to switch between a first position and a second position relative to the POM bushing assembly 300.

[0030] When aligning the first hinge piece 100 and the second hinge piece 200, the shaft 400 is initially in the first position. After the second connecting part 210 is placed between the two first connecting parts 110, the shaft 400 is adjusted to the second position by the drive adjustment assembly 500, thereby completing the alignment of the first hinge piece 100 and the second hinge piece 200.

[0031] See also Figure 4 In some embodiments, the shaft 400 is located in a first position, and the entire shaft 400 is located within the first bushing 310.

[0032] When the first hinge piece 100 and the second hinge piece 200 are not spliced, the shaft 400 is located in the first position and is completely located inside the first bushing 310. When splicing the first hinge piece 100 and the second hinge piece 200, the second connecting part 210 needs to be placed between the two first connecting parts 110.

[0033] See also Figure 5 In some embodiments, the shaft 400 is located in a second position, with a portion of the shaft 400 located inside the first bushing 310 and another portion of the shaft 400 located inside the second bushing 320.

[0034] When the first hinge piece 100 and the second hinge piece 200 are joined together, the shaft 400 is in the second position, so that part of the shaft 400 is located inside the first bushing 310 and the other part of the shaft 400 is located inside the second bushing 320.

[0035] See also Figures 4 to 5In some embodiments, the adjustment assembly 500 includes a rotating body 510 rotatably connected to the second connecting part 210, the rotating body 510 having a receiving cavity 520 with an internal thread; the shaft 400 is slidably connected to the second connecting part 210, and a portion of its outer wall is provided with an external thread, which engages with the internal thread.

[0036] By connecting the rotating body 510 and the shaft 400 through a threaded connection, and with the shaft 400 slidably connected to the second connecting part 210, the relative position of the rotating body 510 and the shaft 400 can be adjusted by using the threaded connection between the two when the rotating body 510 is manually driven to rotate. This allows the shaft 400 to be switched between the first and second positions by adjusting the rotating body 510.

[0037] See also Figures 2 to 3 In some embodiments, a limiting component 600 is also included, which is disposed between the second hinge piece 200 and the adjusting component 500.

[0038] After the adjusting component 500 has switched the position of the shaft 400 (the adjusting component 500 needs to be manually adjusted during the adjustment of the shaft 400), the adjusting component 500 can be restricted by the set limit component 600 to prevent the adjusting component 500 from switching the position of the shaft 400 without human intervention when the hinge device repeatedly performs opening and closing actions.

[0039] See also Figure 3 In some embodiments, the limiting component 600 includes a limiting pin 610 and a countersunk hole 620. The countersunk hole 620 is placed on the rotating body 510. The limiting pin 610 is slidably disposed on the second hinge piece 200, and an elastic element 630 is provided between the limiting pin 610 and the second hinge piece 200.

[0040] The mating parts of the limiting pin 610 and the countersunk hole 620 are both designed as hemispherical structures, so that the limiting pin 610 can be disengaged from the countersunk hole 620 under manual operation. Multiple countersunk holes 620 are provided on the rotating body 510, and are equidistantly distributed circumferentially on the outer wall of the rotating body 510. During the adjustment of the rotating body 510, the limiting pin 610 can be partially embedded in the countersunk hole 620 under the action of the elastic element 630, thereby restricting the rotation of the rotating body 510 and achieving fixation of the rotating body 510 without manual operation. When it is necessary to switch the position of the shaft center 400, the elastic force of the elastic element 630 can be overcome to drive the rotating body 510 to rotate under manual operation, thereby enabling the hinge device to switch the shaft center 400 between the first position and the second position under manual operation.

[0041] This utility model is not limited to the above-mentioned optional embodiments. Anyone can derive other forms of products under the guidance of this utility model. However, regardless of any changes made in its shape or structure, any technical solution that falls within the scope of the claims of this utility model shall be protected by this utility model.

Claims

1. A low noise fire door hinge arrangement characterised in that: Comprising a first hinge leaf, one side of the first hinge leaf having two first connecting portions; a second hinge leaf, one side of the second hinge leaf having a second connecting portion, the second connecting portion being disposed between the two first connecting portions; a POM shaft sleeve assembly, the POM shaft sleeve assembly being located at the connection between the first connecting portion and the second connecting portion; a shaft center, the shaft center penetrating the POM shaft sleeve assembly, so that the first hinge leaf and the second hinge leaf rotate relative to each other around the shaft center.

2. A low noise fire door hinge arrangement according to claim 1, characterised in that: The POM shaft sleeve assembly comprises a first shaft sleeve and a second shaft sleeve, the first shaft sleeve being disposed at the first connecting portion, and the second shaft sleeve being disposed at the second connecting portion.

3. A low noise fire door hinge arrangement according to claim 2, wherein: Further comprising an adjusting assembly, the adjusting assembly being connected to the second connecting portion and the shaft center, so as to adjust the switching of the shaft center relative to the POM shaft sleeve assembly between a first position and a second position.

4. A low noise fire door hinge arrangement according to claim 3, wherein: When the shaft center is in the first position, the shaft center is entirely located in the first shaft sleeve.

5. A low-noise fire door hinge apparatus as defined in claim 3, wherein: When the shaft center is in the second position, part of the shaft center is located in the first shaft sleeve, and another part of the shaft center is located in the second shaft sleeve.

6. A low-noise fire door hinge apparatus as defined in claim 3, wherein: The adjusting assembly comprises a rotating body rotatably connected to the second connecting portion, the rotating body having a receiving cavity, and an inner thread being disposed in the receiving cavity; The shaft center is slidably connected to the second connecting portion, and part of the outer wall of the shaft center is provided with an outer thread, the outer thread being in mating connection with the inner thread.

7. A low noise fire door hinge arrangement according to claim 6, wherein: Further comprising a limiting assembly, the limiting assembly being disposed between the second hinge leaf and the adjusting assembly.

8. A low noise fire door hinge arrangement according to claim 7, wherein: The limiting assembly comprises a limiting pin and a counterbore, the counterbore being disposed in the rotating body, and the limiting pin being slidably disposed in the second hinge leaf, and a resilient member being disposed between the limiting pin and the second hinge leaf.

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