Oil-free hinges

Abstract

This invention discloses an oil-free floor hinge, i.e., a floor hinge that operates without engine oil, relating to the field of floor hinge technology. It includes a mounting box and a panel, the panel being fixedly mounted on the mounting box. A mounting base is fixedly mounted inside the mounting box, and a shaft cover plate is fixedly mounted on the mounting base. This invention achieves the effect of adjusting the extension and retraction speed of the telescopic cylinder by controlling airflow, thus avoiding the use of engine oil as a control medium. This solves the problems of existing floor hinges, which, due to their annular oil circuit and use hydraulic oil as a control medium, may leak oil and lose performance after long-term use due to aging of seals or mechanical wear. This can cause the door to close too quickly due to uncontrolled movement, potentially injuring people. Furthermore, because the interior is filled with engine oil, there is a possibility of explosion, oil spraying, and combustion in the event of a fire, posing a danger to human life. Additionally, in extreme low-temperature environments, the viscosity of the oil may change, leading to slow or stopped closing speeds.

Claims

1. An oil-free hinge, comprising a mounting box (1) and a panel (2), wherein the panel (2) is fixedly mounted on the mounting box (1), a mounting base (3) is fixedly mounted inside the mounting box (1), and a shaft cover plate (4) is fixedly mounted on the mounting base (3), characterized in that: a fixing seat (10) is fixedly mounted inside the mounting base (3), a second rolling bearing (11) is fixedly mounted on the fixing seat (10), and an organic shaft (6) is fixedly mounted on the inner ring of the second rolling bearing (11), further comprising: A sliding assembly is disposed inside the mounting base (3); the sliding assembly includes a pair of sliding side plates (18), a base (20), and a sliding frame (19). The pair of sliding side plates (18) are slidably installed on both sides inside the mounting base (3), and the sliding frame (19) is fixedly installed between the pair of sliding side plates (18) by bolts. A transmission assembly is disposed inside the mounting base (3); the transmission assembly includes a sliding bracket (23) fixedly installed inside the mounting base (3). The sliding bracket (23) is slidably engaged with the sliding side plates (18), and slide rails (24) are fixedly installed on both sides of the surface of the sliding bracket (23).

2. As described in claim 1, the bottom of the sliding frame (19) and the sliding side plate (18) are jointly connected to a base (20) by bolts. A rolling bearing (21) is fixedly installed on the inner bottom of the mounting base (3). The rolling bearing (21) and the base (20) are in rolling engagement. A short rack (22) is fixedly installed on the sliding frame (19). A spring seat (37) is fixedly installed inside the rear end of the mounting base (3). A main spring (36) is fixedly connected to the spring seat (37) and the sliding frame (19).

3. As described in claim 1, the oil-free hinge has a pair of pull plates (5) fixedly connected to one side of the sliding frame (19) by bolts. The pair of pull plates (5) have through slots adapted to the machine shaft (6). The machine shaft (6) moves through the pull plates (5). Rolling bearings (9) are fixedly installed on both sides of the front end of the pull plates (5). Slotted back plates (35) are fixedly installed on both inner sides of the front end of the mounting base (3). The rolling bearings (9) and the slotted back plates (35) roll together. Multiple rollers (8) are rotatably installed in the middle of the pair of pull plates (5). A cam (7) is fixedly installed on the machine shaft (6).

4. The oil-free hinge as described in claim 1, wherein a pair of mounting rods 1 (25) and 3 (27) and a plurality of mounting rods 2 (26) are fixedly mounted on the surface of the sliding bracket (23), wherein a plurality of support needle rollers (29) are movably mounted on one of the mounting rods 1 (25), and a bushing (33) is sleeved on the other mounting rod 1 (25), and double-layer gears (30) are mounted on the outside of the plurality of support needle rollers (29) and bushing (33), respectively, and support bearing 1 (28) and support bearing 2 (34) are fixedly mounted on the mounting rods 2 (26) and 3 (27), respectively, and transmission gear 2 (32) and transmission gear 1 (31) are fixedly mounted on the outer rings of the support bearing 1 (28) and support bearing 2 (34), respectively.

5. The oil-free hinge as described in claim 1, wherein a cylinder seat (12) is fixedly installed at one end of the interior of the mounting base (3), and a pair of telescopic cylinders (13) are symmetrically fixedly installed on one side of the cylinder seat (12), and an intake valve (14) and an exhaust valve (15) are symmetrically fixedly installed on the cylinder seat (12), wherein the exhaust valve (15) can control the airflow rate during the reverse rotation of the machine shaft (6).

6. The oil-free hinge as described in claim 5, wherein each pair of telescopic cylinders (13) is fixedly mounted with a fixed frame (16) at its telescopic end, and a long rack (17) is fixedly mounted on the fixed frame (16), and the long rack (17) slides in cooperation with the slide rail (24).

7. The oil-free hinge as claimed in claim 2, wherein the short rack (22) meshes with a double-layer gear (30), and the double-layer gear (30) meshes with a first transmission gear (31) and a second transmission gear (32), respectively.

8. The oil-free hinge as claimed in claim 6, wherein the long rack (17) meshes with the second transmission gear (32), and a plurality of adjacent second transmission gears (32) mesh with each other.

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