A hinge that is easy to lubricate and maintain

Abstract

This utility model relates to the field of hinges and discloses a hinge that facilitates lubrication and maintenance. It includes an upper hinge, which is rotatably mounted on the right side of a lower hinge. An upper bushing with an open end is fixed to the left side of the upper hinge, and a lower bushing with an open end is fixed to the right side of the lower hinge. A hinge shaft is provided inside the upper bushing, and a collection box is fixed to the bottom end of a first screw. In this utility model, the combined use of an oil injection hole, a first guide groove, a second guide groove, a collection groove, an oil outlet hole, a first threaded groove, a first screw, and a collection box achieves the injection and uniform distribution of lubricating oil, effectively improving lubrication and extending the hinge's service life. Simultaneously, it guides and collects excess lubricating oil, preventing it from flowing everywhere. This not only maintains the cleanliness of the surrounding environment but also facilitates centralized disposal of the lubricating oil by workers, reducing the risk of environmental pollution.

Description

Technical Field

[0001] This utility model relates to the technical field of hinges, specifically to a hinge that is easy to lubricate and maintain. Background Technology

[0002] Existing door hinges generally consist of an upper hinge, a lower hinge, and a hinge shaft. The upper and lower hinges each have a bushing with one open end on one side. One end of the hinge shaft is fixed inside the bushing of the lower hinge, and the other end of the hinge shaft is inserted into the bushing of the upper hinge, allowing the upper hinge to rotate around the hinge shaft. Several anti-wear washers are also fitted on the hinge shaft between the upper and lower hinges. The lower hinge leaf is fixed to the door frame, and the upper hinge leaf is fixed to the door leaf.

[0003] A hinge, disclosed in Chinese Patent Publication No. CN220504806U, comprises an upper hinge, a lower hinge, and a hinge shaft. Each of the upper and lower hinges has a bushing on one side. One end of the hinge shaft is fixed within the bushing of the lower hinge, and the other end is inserted into the bushing of the upper hinge. The hinge is characterized by an oil injection hole at the center of the top of the bushing of the upper hinge, which is sealed by a cap. An elastic retaining ring is fitted onto one end of the hinge shaft, tightly encircling the hinge shaft and allowing it to slide up and down along the hinge shaft under external force.

[0004] In the above solution, lubricating oil is injected into the bushing on the upper hinge through the oil injection hole, which has the following disadvantages: the lubricating oil is prone to overflow during use and cannot be effectively collected and treated. Utility Model Content

[0005] The purpose of this invention is to provide a hinge that is easy to lubricate and maintain, in order to solve the problem that the lubricating oil easily overflows during use and cannot be effectively collected and treated.

[0006] To achieve the above-mentioned utility model objectives, the present utility model adopts the following technical solution: a hinge that is easy to lubricate and maintain, including an upper hinge, the upper hinge being rotatably disposed on the right side of a lower hinge, an upper bushing with an open end fixed to the left side of the upper hinge, and a lower bushing with an open end fixed to the right side of the lower hinge, a hinge shaft being provided inside the upper bushing, the bottom end of the hinge shaft being fixed inside the lower bushing, an oil injection hole being provided on the front side of the outer wall of the upper bushing, first guide grooves being provided on both the front and rear sides of the inner wall of the upper bushing, a plurality of second guide grooves being provided on the inner wall of the upper bushing, the plurality of second guide grooves being connected to two first guide grooves, a collection groove being provided at the top of the lower bushing, a plurality of oil outlet holes being provided on the outer wall of the lower bushing, the plurality of oil outlet holes being connected to the collection groove, a first threaded groove being provided at the bottom of the lower bushing, a first screw being threadedly connected to the first threaded groove, and a collection box being fixed at the bottom end of the first screw.

[0007] Preferably, a sealing ring is fixed to the inner wall of the collection box, and a sealing plug is interference-fitted inside the oil injection hole.

[0008] Preferably, the top end of the upper bushing is provided with a rotating hole, the top end of the hinge shaft is provided with a second threaded groove, a second screw is threadedly connected in the second threaded groove, and a stop block is fixed at the top end of the second screw.

[0009] Preferably, the outer wall of the stop block is fixed with a plurality of first protrusions, and the outer wall of the collection box is fixed with a plurality of second protrusions.

[0010] Preferably, the outer wall of the hinge shaft is fitted with a wear-resistant ring, which is located between the upper and lower bushings.

[0011] Preferably, the top of the wear-resistant ring is provided with a receiving groove, and the bottom surface of the receiving groove is provided with a plurality of guide grooves.

[0012] Compared with existing technologies, a hinge that adopts the above technical solution and is easy to lubricate and maintain has the following advantages:

[0013] First, during use, the oil injection hole, first guide groove, second guide groove, collection groove, oil outlet hole, first threaded groove, first screw and collection box work together to achieve the injection and uniform distribution of lubricating oil, effectively improving the lubrication effect and extending the service life of the hinge. At the same time, it can guide and collect excess lubricating oil, preventing lubricating oil from flowing everywhere. This not only keeps the surrounding environment clean, but also makes it easier for staff to centrally handle the lubricating oil, reducing the risk of environmental pollution.

[0014] Second, during use, it can provide a seal, effectively preventing lubricating oil from overflowing from the collection box. The sealing plug can seal the oil filling hole, preventing dust, impurities, etc. from entering the upper bushing, thus improving cleanliness. The disassembly and assembly structure is simple and easy to operate, requiring no complicated tools or professional skills, thereby improving the efficiency of maintenance work.

[0015] Thirdly, during use, the first protrusion provides a better grip point for the operator. The operator can pinch the first protrusion with their fingers, increasing the friction between the hand and the stop block, thus making it easier and more accurate to rotate the stop block and avoiding operational errors caused by slipping. The wear ring prevents direct friction between the upper and lower bushings, improving the overall service life of the hinge. It also ensures that lubricating oil is effectively collected, preventing its accumulation and waste on the wear ring and improving lubricating oil utilization. Attached Figure Description

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

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

[0018] Figure 3 This is a cross-sectional schematic diagram of the wear-resistant ring in an embodiment.

[0019] Figure 4 This is a cross-sectional schematic diagram of the collection box in an embodiment.

[0020] Figure 5 This is a cross-sectional view of the lower bushing in an embodiment.

[0021] In the diagram: 1. Upper hinge; 2. Lower hinge; 3. Upper bushing; 4. Lower bushing; 5. Hinge shaft; 6. Oil injection hole; 7. First guide groove; 8. Second guide groove; 9. Collection groove; 10. Oil outlet hole; 11. First threaded groove; 12. First screw; 13. Collection box; 14. Sealing ring; 15. Sealing plug; 16. Rotating hole; 17. Second threaded groove; 18. Second screw; 19. Stop block; 20. First protrusion; 21. Second protrusion; 22. Wear-resistant ring; 23. Receiving groove; 24. Guide sloping groove. Detailed Implementation

[0022] The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0023] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, a hinge designed for easy lubrication and maintenance includes an upper hinge 1, which is rotatably mounted on the right side of a lower hinge 2. An upper bushing 3 with an open end is fixed to the left side of the upper hinge 1, and a lower bushing 4 with an open end is fixed to the right side of the lower hinge 2. A hinge shaft 5 is provided inside the upper bushing 3, with its bottom end fixed inside the lower bushing 4. An oil injection hole 6 is provided on the front side of the outer wall of the upper bushing 3, and first guide grooves 7 are provided on both the front and rear sides of the inner wall of the upper bushing 3. The inner wall of the upper bushing 3 is provided with several second guide grooves 8, and the several second guide grooves 8 are all connected to two first guide grooves 7. The top of the lower bushing 4 is provided with a collection groove 9, and the outer wall of the lower bushing 4 is provided with several oil outlet holes 10, and the several oil outlet holes 10 are all connected to the collection groove 9. The bottom of the lower bushing 4 is provided with a first threaded groove 11, and a first screw 12 is internally threaded into the first threaded groove 11. The bottom of the first screw 12 is fixed with a collection box 13.

[0024] During use, the operator slowly injects lubricating oil into the upper bushing 3 through the oil injection hole 6. After entering the upper bushing 3, the lubricating oil fills the gap between the upper bushing 3 and the hinge shaft 5, effectively lubricating the contact surface between the hinge shaft 5 and the upper bushing 3. This reduces friction during rotation, making the hinge rotate more smoothly. Because the upper bushing 3 has first guide grooves 7 on both the front and rear sides of its inner wall, and several second guide grooves 8 connected to the two first guide grooves 7, the lubricating oil, under its own weight, will be evenly distributed along these guide grooves. This prevents the lubricating oil from concentrating in a single area, ensuring that all parts between the hinge shaft 5 and the upper bushing 3 are adequately lubricated, thus improving lubrication efficiency. To ensure uniformity and effectiveness, after the lubricating oil flows out from the bottom of the first guide groove 7, it flows downward along the outer wall of the hinge shaft 5 and finally flows into the collection groove 9 of the lower bushing 4. The collection groove 9 serves to temporarily store the lubricating oil and prevent it from flowing randomly. Subsequently, the lubricating oil flows out from several oil outlet holes 10 connected to the collection groove 9 and flows precisely into the interior of the collection box 13 for collection. When the lubricating oil in the collection box 13 accumulates to a certain amount, the operator only needs to hold the collection box 13 and rotate it. The first screw 12 will gradually disengage from the first thread groove 11, thereby removing the collection box 13. Afterward, the operator can properly handle the lubricating oil in the collection box 13, such as recycling or safe disposal. By using the oil injection hole 6, the first guide groove 7, the second guide groove 8, the collection groove 9, the oil outlet hole 10, the first threaded groove 11, the first screw 12, and the collection box 13 in combination, the lubricating oil is injected and evenly distributed, which effectively improves the lubrication effect and extends the service life of the hinge. At the same time, it can guide and collect excess lubricating oil, preventing lubricating oil from flowing everywhere. This not only keeps the surrounding environment clean, but also makes it easier for staff to centrally handle the lubricating oil, reducing the risk of environmental pollution.

[0025] like Figure 2 , Figure 3 and Figure 5 As shown, a sealing ring 14 is fixed to the inner wall of the collection box 13, and a sealing plug 15 is interference-fitted inside the oil injection hole 6.

[0026] During use, after the staff installs the collection box 13 on the lower bushing 4, the sealing ring 14 can fit tightly against the outer wall of the lower bushing 4 to seal it, effectively preventing the lubricating oil in the collection box 13 from overflowing. The sealing plug 15 can seal the oil filling hole 6, preventing dust, impurities and other contaminants from entering the interior of the upper bushing 3, thus improving cleanliness.

[0027] like Figure 1 , Figure 2 , Figure 4 and Figure 5As shown, the top end of the upper bushing 3 is provided with a rotating hole 16, the top end of the hinge shaft 5 is provided with a second threaded groove 17, the second threaded groove 17 is internally threaded with a second screw 18, the top end of the second screw 18 is fixed with a stop block 19, the outer wall of the stop block 19 is fixed with a number of first protrusions 20, and the outer wall of the collection box 13 is fixed with a number of second protrusions 21.

[0028] During use, when maintenance of the hinge is required, the second screw 18 is rotated within the second threaded groove 17 at the top of the hinge shaft 5 by rotating the stop 19. This causes the second screw 18 to gradually unscrew out of the second threaded groove 17, thereby separating the upper bushing 3 from the hinge shaft 5. Similarly, during installation, the worker places the upper bushing 3 onto the hinge shaft 5, then passes the second screw 18 through the rotating hole 16, and rotates the stop 19 in the opposite direction to screw the second screw 18 into the second threaded groove 17, completing the installation. The disassembly and assembly structure is simple and easy to operate, requiring no complicated tools or professional skills, thus improving the efficiency of maintenance work. When the operator needs to rotate the stop 19 to disassemble or assemble the hinge, the first protrusion 20 provides a better point of leverage. The operator can pinch the first protrusion 20 with their fingers to increase the friction between their hand and the stop 19, thus making it easier and more accurate to rotate the stop 19 and avoiding operational errors caused by slipping. Similarly, when the operator needs to rotate the collection box 13 to remove or install it from the lower bushing 4, they can hold the second protrusion 21 and apply appropriate force to rotate the collection box 13, so that the first screw 12 can be smoothly screwed out or into the first threaded groove 11, improving the convenience and accuracy of the operation.

[0029] like Figures 1-3 and Figure 5 As shown, a wear-resistant ring 22 is fitted on the outer wall of the hinge shaft 5. The wear-resistant ring 22 is located between the upper shaft sleeve 3 and the lower shaft sleeve 4. A receiving groove 23 is opened at the top of the wear-resistant ring 22, and several guide grooves 24 are opened on the bottom surface of the inner side of the receiving groove 23.

[0030] During use, the wear-resistant ring 22 prevents direct friction between the upper bushing 3 and the lower bushing 4, thus improving the overall service life of the hinge. The wear-resistant ring 22 is made of PTFE-based composite material, which has self-lubricating properties and effectively reduces frictional resistance during hinge rotation, resulting in smoother hinge rotation. When the lubricating oil in the upper bushing 3 flows downward through the first guide groove 7, it falls onto the wear-resistant ring 22. At this time, the receiving groove 23 collects the lubricating oil, preventing it from flowing randomly to other parts. The guide groove 24 further guides the flow direction of the lubricating oil. After entering the receiving groove 23, the lubricating oil flows downward along the guide groove 24 and finally flows into the collection groove 9 at the top of the lower bushing 4, ensuring that the lubricating oil is effectively collected, avoiding accumulation and waste on the wear-resistant ring 22, and improving the utilization rate of the lubricating oil.

[0031] 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 hinge that is easy to lubricate and maintain, comprising an upper hinge (1) rotatably disposed on the right side of a lower hinge (2), characterized in that, An upper bushing (3) with an open end is fixed to the left side of the upper hinge (1), and a lower bushing (4) with an open end is fixed to the right side of the lower hinge (2). A hinge shaft (5) is provided inside the upper bushing (3), and the bottom end of the hinge shaft (5) is fixed inside the lower bushing (4). An oil injection hole (6) is provided on the front side of the outer wall of the upper bushing (3). A first guide groove (7) is provided on both the front and rear sides of the inner wall of the upper bushing (3), and a plurality of second guide grooves (8) are provided on the inner wall of the upper bushing (3). Several second guide grooves (8) are connected to two first guide grooves (7). A collection groove (9) is provided at the top of the lower bushing (4). Several oil outlet holes (10) are provided on the outer wall of the lower bushing (4). Several oil outlet holes (10) are connected to the collection groove (9). A first threaded groove (11) is provided at the bottom of the lower bushing (4). A first screw (12) is threadedly connected to the first threaded groove (11). A collection box (13) is fixed at the bottom of the first screw (12).

2. The hinge for easy lubrication and maintenance according to claim 1, characterized in that: The inner wall of the collection box (13) is fixed with a sealing ring (14), and the inside of the oil injection hole (6) is fitted with a sealing plug (15).

3. A hinge for easy lubrication and maintenance according to claim 2, characterized in that: The upper bushing (3) has a rotating hole (16) at its top end, and the hinge shaft (5) has a second threaded groove (17) at its top end. The second threaded groove (17) is threaded with a second screw (18), and a stop block (19) is fixed at the top end of the second screw (18).

4. A hinge for easy lubrication and maintenance according to claim 3, characterized in that: The outer wall of the stop block (19) is fixed with a number of first protrusions (20), and the outer wall of the collection box (13) is fixed with a number of second protrusions (21).

5. A hinge for easy lubrication and maintenance according to claim 1, characterized in that: The outer wall of the hinge shaft (5) is fitted with a wear-resistant ring (22), which is located between the upper bushing (3) and the lower bushing (4).

6. A hinge for easy lubrication and maintenance according to claim 5, characterized in that: The wear-resistant ring (22) has a receiving groove (23) at its top end, and a number of guide grooves (24) are provided on the bottom surface of the receiving groove (23).

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