Compact hinge

Abstract

The utility model relates to the field of hinges, and discloses a compact hinge which comprises a first lug plate, the first lug plate is detachably arranged on the left side of a second lug plate, two first shaft barrels are fixed to the right side of the first lug plate, and a second shaft barrel is fixed to the left side of the second lug plate. A mandrel is arranged between the two first shaft barrels and the second shaft barrel, a plug is detachably arranged at the top end of the mandrel, two lubricating holes are formed in the top faces of the two first shaft barrels and the top face of the second shaft barrel respectively, and containing grooves are formed in the left sides and the right sides of the inner walls of the two first shaft barrels and the inner wall of the second shaft barrel respectively. The containing grooves communicate with the interiors of the lubricating holes, and balls are rotatably arranged in the two containing grooves correspondingly. According to the utility model, the lubricating holes, the accommodating grooves and the balls are favorable for realizing automatic lubrication, the operation is simple and convenient, the use difficulty is reduced, the effective utilization of lubricating oil is ensured, and the waste is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of hinges, specifically a compact hinge. Background Technology

[0002] A hinge, also known as a hinge, is a mechanical device used to connect two solid objects and allow them to rotate relative to each other. Hinges can be made of movable components or foldable materials, and they have a wide range of uses, especially in doors and windows.

[0003] According to Chinese Patent No. CN221810792U, a compact hinge includes a first ear plate with a second shaft cylinder, a second ear plate with a first shaft cylinder, and a shaft body for coaxially connecting the first shaft cylinder and the second shaft cylinder. The shaft body includes: a pin tube coaxially passing through the first shaft cylinder and the second shaft cylinder, a pressure relief groove hole opened on the side wall of the pin tube at a position corresponding to the first shaft cylinder and the second shaft cylinder, a stop plate axially arranged on the inner wall of the pin tube near the pressure relief groove hole, and a shaft end cap covering the bottom end of the pin tube; and an inner shaft rod coaxially passing through the pin tube, with a pressing plate on the side wall of the inner shaft rod contacting the inner wall of the pin tube.

[0004] In the above solution, the inner shaft is rotated by using tools such as pliers and screwdrivers to rotate the extrusion plate and move it closer to the stop plate, thus squeezing out the lubricating medium. This has the following disadvantages: the hinge requires manual rotation of the inner shaft to achieve lubrication, which is cumbersome and complicated, increasing the difficulty of use. Utility Model Content

[0005] The purpose of this invention is to provide a compact hinge to solve the problem that the hinge requires manual rotation of the inner shaft for lubrication, which is cumbersome and complicated and increases the difficulty of use.

[0006] To achieve the above-mentioned utility model objectives, the present utility model adopts the following technical solution: a compact hinge, including a first ear plate, the first ear plate being detachably disposed on the left side of a second ear plate, two first shaft cylinders being fixed on the right side of the first ear plate, a second shaft cylinder being fixed on the left side of the second ear plate, a spindle being disposed between the two first shaft cylinders and the second shaft cylinder, a plug being detachably disposed at the top end of the spindle, a threaded groove being formed at the top end of the spindle, an external thread being formed on the outer wall of the plug, the external thread being connected to the internal thread of the threaded groove, two lubrication holes being formed on the top surfaces of the two first shaft cylinders and the second shaft cylinder respectively, receiving grooves being formed on the left and right sides of the inner walls of the two first shaft cylinders and the second shaft cylinder respectively, the receiving grooves being connected to the interior of the lubrication holes, and ball bearings being rotatably disposed inside the two receiving grooves respectively.

[0007] Preferably, the outer wall of the mandrel is fitted with two lubrication sleeves, which are respectively located between the two first shaft cylinders and the second shaft cylinder.

[0008] Preferably, the outer walls of the two lubrication sleeves are respectively provided with protective sleeves, and the two protective sleeves are arranged at a distance from the second shaft cylinder.

[0009] Preferably, the top surfaces of the two protective sleeves are provided with a plurality of through holes.

[0010] Preferably, the top surfaces of the two protective sleeves are respectively provided with oil storage tanks, and the plurality of through holes are respectively connected to the oil storage tanks.

[0011] Preferably, both of the oil storage tanks are inclined grooves.

[0012] Compared with existing technologies, a compact hinge employing the above-mentioned technical solution has the following beneficial effects:

[0013] First, during use, the lubrication holes, receiving grooves, and ball bearings facilitate automatic lubrication, making operation simple and convenient, reducing the difficulty of use, and ensuring the effective use of lubricating oil while reducing waste.

[0014] Second, during use, the lubrication sleeve helps to further reduce friction between the spindle and the first and second shaft cylinders, improving the hinge's rotational flexibility. It also lowers the coefficient of friction between the spindle and the shaft cylinders, extending the hinge's service life. The protective sleeve effectively prevents external debris from damaging the lubrication sleeve and spindle, while also providing some dust protection, enhancing the hinge's protective performance and improving its resistance to damage. The through-hole allows lubricating oil from the lubrication hole to flow smoothly into the gap between the protective sleeve and the lubrication sleeve, further lubricating the contact surfaces between the spindle and the first and second shaft cylinders, ensuring uniform distribution of lubricating oil and improving lubrication efficiency.

[0015] Thirdly, during use, the top surfaces of both protective sleeves are equipped with oil reservoirs, and several through holes are connected to these reservoirs. The design of the oil reservoirs allows operators to pre-fill them with an appropriate amount of lubricating oil. When the hinge requires lubrication, the lubricating oil flows through the through holes into the lubrication holes, achieving a continuous lubrication effect. The inclined groove design of the oil reservoirs makes it easier for the internal lubricating oil to flow into the through holes. Under the influence of gravity, the lubricating oil flows along the inclined surface of the groove and enters the lubrication holes through the through holes, achieving a more uniform lubrication effect. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of an embodiment.

[0017] Figure 2 This is an exploded diagram of an embodiment.

[0018] Figure 3 This is a cross-sectional view of the first shaft cylinder in the embodiment.

[0019] Figure 4 This is a cross-sectional view of the protective sleeve in the embodiment.

[0020] In the figure: 1. First ear plate; 2. Second ear plate; 3. First shaft cylinder; 4. Second shaft cylinder; 5. Mandrel; 6. Plug; 7. Threaded groove; 8. External thread; 9. Lubrication hole; 10. Receiving groove; 11. Ball; 12. Lubrication sleeve; 13. Protective sleeve; 14. Through hole; 15. Oil reservoir. Detailed Implementation

[0021] The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0022] like Figures 1-3 As shown, a compact hinge includes a first ear plate 1, which is detachably disposed on the left side of a second ear plate 2. Two first shaft cylinders 3 are fixed to the right side of the first ear plate 1, and a second shaft cylinder 4 is fixed to the left side of the second ear plate 2. A spindle 5 is provided between the two first shaft cylinders 3 and the second shaft cylinder 4. A plug 6 is detachably disposed at the top of the spindle 5. A threaded groove 7 is provided at the top of the spindle 5. An external thread 8 is provided on the outer wall of the plug 6. The external thread 8 is threadedly connected to the internal thread of the threaded groove 7. Two lubrication holes 9 are respectively provided on the top surfaces of the two first shaft cylinders 3 and the second shaft cylinder 4. Receiving grooves 10 are respectively provided on the left and right sides of the inner walls of the two first shaft cylinders 3 and the second shaft cylinder 4. The receiving grooves 10 are connected to the interior of the lubrication holes 9. Ball bearings 11 are rotatably disposed inside the two receiving grooves 10.

[0023] In use, when two objects need to be hinged, the operator first accurately places the second shaft cylinder 4 on the second ear plate 2 between the two first shaft cylinders 3. Then, the mandrel 5 passes through these three shaft cylinders to achieve their coaxial connection. The external thread 8 on the plug 6 is threaded to the threaded groove 7 at the top of the mandrel 5 to ensure the stability of the structure. At this time, the first ear plate 1 and the second ear plate 2 can rotate flexibly with the mandrel 5 as the central axis to meet the hinge requirements. In terms of lubrication, the operator fills the lubrication holes 9 with an appropriate amount of lubricating oil. These lubrication holes 9 are connected to the internal ball bearings 11 through the receiving groove 10. When the first ear plate 1 or the second ear plate 2 rotates, the ball bearings 11 will roll along the outer wall of the mandrel 5 and spread the lubricating oil evenly on the contact surface to achieve effective lubrication. At the same time, some lubricating oil will also flow downward through the lubrication holes 9 to further supplement the lubrication of the contact surface. When the hinge is stationary, the ball bearings 11 will naturally block the lubricating oil because they cannot rotate, preventing it from being lost. The lubrication hole 9, receiving groove 10, and ball bearing 11 facilitate automatic lubrication, making operation simple and convenient, reducing the difficulty of use, and ensuring the effective use of lubricating oil while reducing waste.

[0024] like Figures 1-3 As shown, the outer wall of the mandrel 5 is fitted with two lubrication sleeves 12, which are located between the two first shaft cylinders 3 and the second shaft cylinder 4, respectively.

[0025] During use, the lubrication sleeve 12 helps to further reduce the friction between the spindle 5 and the first shaft cylinder 3 and the second shaft cylinder 4, improve the rotational flexibility of the hinge, and at the same time reduce the friction coefficient between the spindle 5 and the shaft cylinder, thus extending the service life of the hinge.

[0026] like Figure 1 , Figure 2 and Figure 4 As shown, the outer walls of the two lubrication sleeves 12 are respectively provided with protective sleeves 13, the two protective sleeves 13 are spaced apart from the second shaft cylinder 4, and the top surfaces of the two protective sleeves 13 are respectively provided with several through holes 14.

[0027] During use, the protective sleeve 13 effectively prevents external debris from damaging the lubrication sleeve 12 and the spindle 5, while also providing some dust protection, enhancing the hinge's protective performance and improving its resistance to damage. The through hole 14 allows the lubricating oil in the lubrication hole 9 to flow smoothly into the gap between the protective sleeve 13 and the lubrication sleeve 12, further lubricating the contact surfaces between the spindle 5 and the first shaft cylinder 3 and the second shaft cylinder 4, ensuring uniform distribution of the lubricating oil and improving the lubrication effect.

[0028] like Figure 2 and Figure 4As shown, the top surfaces of the two protective sleeves 13 are respectively provided with oil storage tanks 15, and several through holes 14 are respectively connected to the oil storage tanks 15. Both oil storage tanks 15 are inclined grooves.

[0029] During use, the top surfaces of the two protective sleeves 13 are each provided with an oil reservoir 15, and several through holes 14 are connected to the oil reservoir 15. The design of the oil reservoir 15 allows the operator to pre-fill it with an appropriate amount of lubricating oil. When the hinge needs lubrication, the lubricating oil will flow into the lubrication hole 9 through the through holes 14 to achieve a continuous lubrication effect. The design of the oil reservoir 15 as an inclined groove makes it easier for the internal lubricating oil to flow into the through holes 14. Under the action of gravity, the lubricating oil will flow along the inclined surface of the groove and enter the lubrication hole 9 through the through holes 14 to achieve a more uniform lubrication effect.

[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A compact hinge, comprising a first ear plate (1) detachably disposed on the left side of a second ear plate (2), characterized in that, Two first shaft cylinders (3) are fixed on the right side of the first ear plate (1), and a second shaft cylinder (4) is fixed on the left side of the second ear plate (2). A mandrel (5) is provided between the two first shaft cylinders (3) and the second shaft cylinder (4). A plug (6) is detachably provided at the top of the mandrel (5). A threaded groove (7) is provided at the top of the mandrel (5). An external thread (8) is provided on the outer wall of the plug (6). The external thread (8) is connected to the internal thread of the threaded groove (7). Two lubrication holes (9) are respectively provided on the top surface of the two first shaft cylinders (3) and the second shaft cylinder (4). Receiving grooves (10) are respectively provided on the left and right sides of the inner walls of the two first shaft cylinders (3) and the second shaft cylinder (4). The receiving grooves (10) are connected to the interior of the lubrication holes (9). Ball bearings (11) are rotatably provided inside the two receiving grooves (10).

2. A compact hinge according to claim 1, characterized in that: The outer wall of the mandrel (5) is fitted with two lubrication sleeves (12), which are located between the two first shaft cylinders (3) and the second shaft cylinder (4).

3. A compact hinge according to claim 2, characterized in that: The outer walls of the two lubrication sleeves (12) are respectively provided with protective sleeves (13), and the two protective sleeves (13) are arranged at a distance from the second shaft cylinder (4).

4. A compact hinge according to claim 3, characterized in that: The top surfaces of the two protective sleeves (13) are provided with several through holes (14).

5. A compact hinge according to claim 4, characterized in that: The top surfaces of the two protective sleeves (13) are respectively provided with oil storage tanks (15), and several through holes (14) are respectively connected to the oil storage tanks (15).

6. A compact hinge according to claim 5, characterized in that: Both of the oil storage tanks (15) are inclined grooves.

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