Rust-proof nitrogen spring

Abstract

The utility model provides a kind of rustproof nitrogen gas spring, including nitrogen gas spring shell and piston rod slidingly connected on nitrogen gas spring shell, nitrogen gas spring shell is fixedly connected with support block, rotatably be provided with lubricating ring on support block, lubricating ring includes oil storage cavity and circumferential array on its inner wall splash fin, splash fin is provided with the oil outlet channel of intercommunication in oil storage cavity;Lubricating ring is further connected with actuating portion, actuating portion includes mountain-shaped sliding slot, vertical sliding slot is connected in the upper vertex of mountain-shaped sliding slot, piston rod is sleeved with transmission ring, protruding pin is set on transmission ring, protruding pin is slidably set in mountain-shaped sliding slot or vertical sliding slot.In, by centrifugal force, lubricating oil is thrown out splash, can cover the entire surface of piston rod without dead angle, solve the lubrication blind area problem of contact type smearing mechanism.Control lubricating ring rotational speed by friction change, in turn control oil output, neither waste oil, also ensure the lubrication effect of critical moment.

Description

Technical Field

[0001] This utility model relates to the field of nitrogen springs, specifically a rust-proof nitrogen spring. Background Technology

[0002] Nitrogen springs are widely used in mold design, manufacturing, and industrial automation due to their stable performance and compact structure. However, after long-term high-speed reciprocating motion, the outer surface of the piston rod of a nitrogen spring is highly susceptible to environmental moisture and frictional wear, leading to surface corrosion. This, in turn, increases the sliding resistance of the plunger, damages the seals, and seriously affects the service life and overall performance of the nitrogen spring.

[0003] Existing nitrogen-based rust prevention technologies for springs mainly rely on the following methods: Manual or timed lubrication: This method relies on the operator or a preset time to drip oil, and cannot be adjusted in real time according to the actual working condition and lubrication needs of the piston rod. It is easy to cause excessive supply of lubricating oil, resulting in waste and environmental pollution, or insufficient supply, resulting in poor rust prevention effect.

[0004] Contact-type coating mechanisms (scraper or brush): Some automated devices use brushes or scrapers to apply lubricating oil to the piston rod surface. However, these contact mechanisms have inherent drawbacks: First, brushes or scrapers cannot guarantee absolutely uniform coating around the piston rod surface in a 360-degree circle, easily creating lubrication blind spots. Second, during high-speed operation, the brush bristles may cause lubricating oil to splash and be lost due to rapid retraction, increasing oil consumption and reducing the cleanliness of the surrounding environment.

[0005] In summary, existing technologies lack a highly efficient and reliable nitrogen spring anti-rust lubrication device capable of achieving the following objectives: It must be able to coat the entire working surface of the piston rod with lubricating oil without any blind spots and with high uniformity. Simultaneously, it must be able to detect the actual frictional resistance or lubrication condition of the piston rod in real time and supply lubricating oil mechanically on demand, thereby minimizing lubricating oil loss. Furthermore, it should avoid introducing complex electronic control units and sensors to reduce the device's manufacturing cost, maintenance difficulty, and sensitivity to harsh working environments. Utility Model Content

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a rust-proof nitrogen spring that achieves automatic, uniform, and on-demand lubrication of the piston rod through a purely mechanical structure, effectively preventing piston rod corrosion, extending the service life of the nitrogen spring, and reducing lubricating oil consumption.

[0007] Technical solution: To achieve the above objectives, the present invention adopts the following technical solution: A rust-resistant nitrogen spring includes a nitrogen spring housing and a piston rod slidably connected to the nitrogen spring housing. The characteristic feature is that a support block is fixedly connected to the nitrogen spring housing, and a lubrication ring is rotatably disposed on the support block.

[0008] The lubrication ring has an oil reservoir for storing lubricating oil, and multiple splash fins arranged in a circumferential array along its inner wall. The splash fins have oil outlet channels that communicate with the oil reservoir.

[0009] The lubrication ring is also connected to an actuating part, which includes a mountain-shaped groove, and a vertical groove is connected to the upper apex of the mountain-shaped groove.

[0010] A transmission ring capable of slight sliding relative to the piston rod is fitted onto the piston rod. A protruding pin is provided on the transmission ring, and the protruding pin is slidably accommodated within the mountain-shaped groove or the vertical groove.

[0011] Preferably, the lubrication ring is further provided with an elastic uniform ring acting on the piston rod, the elastic uniform ring being disposed below the splash fins. This elastic uniform ring (e.g., made of felt or porous polymer) can collect excess oil droplets splashed onto the piston rod and spread them more evenly on the piston rod surface, serving as a secondary oil distribution and oil quantity buffer.

[0012] Preferably, a plurality of squeezing blocks are slidably disposed on the lubrication ring, and the squeezing blocks act on the oil storage chamber. This provides an auxiliary oil discharge method and increases the flow rate of lubricating oil.

[0013] Preferably, a return spring is provided between the extrusion block and the lubrication ring. The return spring causes the extrusion block to tend to move away from the lubrication ring, so as to ensure that it can automatically reset after the extrusion action is completed.

[0014] Preferably, the lubrication ring is further provided with an upper limit block to limit the travel of the transmission ring, preventing the transmission ring from moving excessively and disengaging from the actuation mechanism.

[0015] Preferably, the number of splash fins is 5, which can form a relatively ideal splash coverage surface while ensuring structural strength.

[0016] Preferably, a sealing cap is provided above the lubrication ring, which can effectively prevent external dust and impurities from contaminating the lubricating oil in the oil storage cavity and reduce the evaporation loss of the lubricating oil.

[0017] Compared with the prior art, the present invention has the following significant advantages: 1. 360° uniform lubrication: By using centrifugal force to throw out and splash lubricating oil, it can cover the entire circumferential surface of the piston rod without dead angles, solving the problem of lubrication blind spots in contact-type coating mechanisms.

[0018] 2. Purely mechanical on-demand oil supply: The rotation speed of the lubrication ring is controlled entirely by changes in friction, thereby controlling the oil output. This achieves intelligent and adaptive lubrication, which not only avoids wasting oil but also ensures lubrication effectiveness at critical moments.

[0019] 3. Extended service life: Continuous and effective rust prevention and lubrication significantly reduce the wear and corrosion risk of the piston rod, protect the seals, and thus greatly extend the overall service life of the nitrogen spring. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present utility model; Figure 2 This is a cross-sectional view of an embodiment of the present invention; Figure 3 This is a cross-sectional view of the lubrication ring in a first direction according to an embodiment of the present invention; Figure 4 This is a cross-sectional view of the lubrication ring in a second direction according to an embodiment of the present invention.

[0022] Explanation of reference numerals in the attached figures: 1. Nitrogen spring housing; 2. Piston rod; 3. Support block; 4. Lubricating ring; 5. Oil reservoir; 6. Splash fins; 7. Oil outlet channel; 8. Actuating part; 9. Mountain-shaped slide groove; 10. Vertical slide groove; 11. Transmission ring; 12. Elastic uniform ring; 13. Extrusion block; 14. Return spring; 15. Upper limit block; 16. Sealing cover; Detailed Implementation

[0023] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product.

[0024] It will be understood by those skilled in the art that certain well-known structures and their descriptions may be omitted in the accompanying drawings. The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0025] Example 1 A rust-resistant nitrogen spring includes a nitrogen spring housing 1 and a piston rod 2 capable of reciprocating linear motion within the housing.

[0026] In the core part of this utility model, a support block 3 is fixedly connected to the protruding end of the nitrogen spring housing 1. An annular lubrication ring 4 is rotatably mounted on the support block 3 via a bearing or a wear-resistant bushing.

[0027] The lubrication ring 4 is a key component of this invention. It has an annular oil reservoir 5 inside for storing rust-preventive lubricating oil. Five splash fins 6 are evenly arranged circumferentially on the inner wall of the lubrication ring 4. Each splash fin 6 has a small oil outlet channel 7 inside, one end of which is connected to the oil reservoir 5, and the other end opens towards the piston rod 2.

[0028] An actuating part 8 is integrally formed or connected to the outer side of the lubrication ring 4. A continuous groove is machined on the actuating part 8, which is composed of multiple "mountain-shaped" inclined groove segments and vertical groove 10 segments located at the top of each "mountain", namely, mountain-shaped groove 9 and vertical groove 10.

[0029] A transmission ring 11, which can slide relative to the piston rod 2, is fitted onto the piston rod 2. A protruding pin is radially fixed on the outer wall of the transmission ring 11, and the head of the protruding pin is precisely embedded in the groove of the aforementioned actuating part 8.

[0030] The workflow is as follows: In a stationary state: when the piston rod 2 is stationary, the protruding pin stays at a certain position in the slide groove, the lubricating ring 4 does not rotate, and no lubricating oil is consumed.

[0031] Piston rod 2 movement: When the mold opens or closes or the equipment runs, piston rod 2 begins to move downwards (or upwards). Piston rod 2 drives transmission ring 11 to move together.

[0032] Motion Conversion: The protruding pin on the transmission ring 11 is forced to slide along the inclined surface of the mountain-shaped groove 9. Since the groove is fixed to the lubrication ring 4, the movement of the pin on the inclined surface will inevitably generate a tangential component force, which drives the entire lubrication ring 4 to rotate around the piston rod 2. The faster the piston rod 2 moves, the higher the rotational speed of the lubrication ring 4. When the piston rod 2 moves to the top or bottom of its stroke and changes direction, the protruding pin will pass through the vertical groove 10. At this time, the lubrication ring 4 does not rotate, avoiding ineffective agitation at the reversal point.

[0033] Centrifugal oil supply: The rotation of the lubricating ring 4 generates centrifugal force. The lubricating oil in the oil storage chamber 5 is squeezed by the extrusion block 13 and forced into the oil outlet channel 7 inside the splash fin 6, and then thrown out at high speed from the end of the channel, evenly splashing onto the surface of the piston rod 2.

[0034] Adaptive adjustment: Condition 1 (Good Lubrication): The oil film on the surface of piston rod 2 is intact, and the friction is low. At this time, the bonding force between the transmission ring 11 and piston rod 2 is not strong. When piston rod 2 moves, transmission ring 11 may slip slightly, resulting in a weaker driving force transmitted to the protruding pin. Therefore, the rotational speed of lubricating ring 4 is lower, and the oil output is correspondingly reduced, saving lubricating oil.

[0035] Condition 2 (Insufficient Lubrication): The surface of piston rod 2 becomes dry due to oil film rupture, significantly increasing friction. At this time, the increased friction causes the transmission ring 11 to be "tightly gripped" by piston rod 2, reducing the relative sliding between them. The motion of piston rod 2 is more efficiently converted into driving force, allowing lubrication ring 4 to achieve high speed through the protruding pin and mountain-shaped groove 9. This high speed generates strong centrifugal force, throwing out more lubricating oil, which quickly replenishes the surface of piston rod 2, restoring it to a lubricated state. Friction then decreases, and the speed of lubrication ring 4 automatically decreases, forming a closed-loop adaptive adjustment system.

[0036] To further optimize the effect, an elastic, uniform ring 12 made of oil-absorbing felt can be added inside the lubrication ring 4 below the splash fins 6. It can gently contact the surface of the piston rod 2, spread the splashed oil droplets evenly, form a smoother oil film, and absorb excess oil to prevent dripping.

[0037] In addition, the top of the lubricating ring 4 can be covered with a sealing cap 16 to prevent external contaminants from entering the oil storage chamber 5 and to keep the lubricating oil clean. At the same time, in order to prevent the extruder from being unable to effectively squeeze out the lubricating oil after the oil is consumed, a pressure plate can be installed in the oil storage chamber 5 to squeeze out the remaining oil in the oil storage chamber 5. Its structure is well known to those skilled in the art, so it will not be described in detail here.

[0038] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A rustproof nitrogen gas spring comprising a nitrogen gas spring housing and a piston rod which is slidably connected to the nitrogen gas spring housing, characterized in that ； The nitrogen spring housing is fixedly connected to a support block, and a lubrication ring is rotatably provided on the support block. The lubrication ring includes an oil storage cavity and splash fins arranged circumferentially on its inner wall. The splash fins are provided with an oil outlet channel that communicates with the oil storage cavity. The lubrication ring is also connected to an actuating part, which includes a mountain-shaped slide groove. A vertical slide groove is connected to the upper apex of the mountain-shaped slide groove. A transmission ring is fitted onto the piston rod. A protruding pin is provided on the transmission ring. The protruding pin is slidably disposed in the mountain-shaped slide groove or the vertical slide groove.

2. The rust-proof nitrogen spring according to claim 1, wherein The lubrication ring is also provided with an elastic uniform ring that acts on the piston rod, and the elastic uniform ring is located below the splash fins.

3. The rust-proof nitrogen spring according to claim 1, characterized in that, Multiple extrusion blocks are slidably disposed on the lubrication ring, and the extrusion blocks act on the oil storage cavity.

4. A rust-proof nitrogen spring according to claim 3, characterized in that, A return spring is provided between the extrusion block and the lubrication ring, and the return spring causes the extrusion block to have a tendency to move away from the lubrication ring.

5. A rust-proof nitrogen spring according to claim 1, characterized in that, The lubrication ring is also provided with an upper limit block for limiting the travel of the transmission ring.

6. A rust-proof nitrogen spring according to claim 1, characterized in that, The number of splash fins is 5.

7. A rust-proof nitrogen spring according to claim 1, characterized in that, A sealing cap is provided above the lubrication ring.

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