Limiting structure of nitrogen spring support
By designing a nitrogen spring support with a limiting structure, the safety and lifespan issues of traditional nitrogen spring supports under heavy loads or impact loads are solved, achieving precise limiting and guidance of the lifting components and improving the safety and stability of the device.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- KUNSHAN JIENUOXUAN MACHINERY CO LTD
- Filing Date
- 2025-08-26
- Publication Date
- 2026-06-26
AI Technical Summary
Traditional nitrogen spring supports are prone to cylinder bursting when subjected to sudden heavy loads or impact loads. They lack precise control over the movement stroke of the lifting components, and their simple guiding mechanism leads to shortened service life and safety hazards.
The nitrogen spring support with a limiting structure controls the nitrogen pressure through the intake and exhaust pipes. Combined with the limiting components and guide structure, it achieves height limiting and guidance of the lifting components, avoiding cylinder explosion and repeated bouncing, and ensuring precise control of the support height.
This improved the safety and service life of the device, prevented cylinder bursting and object collisions, ensured the accuracy and stability of the support height, and enhanced the smoothness of operation.
Smart Images
Figure CN224414218U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of nitrogen spring technology, and more specifically, to a nitrogen spring support with a limiting structure. Background Technology
[0002] Nitrogen springs (also known as nitrogen cylinders) are a new type of elastic component that uses high-pressure nitrogen as the working medium. They have advantages such as small size, large elastic force, long stroke, smooth operation, precision manufacturing, long service life (generally up to one million cycles of extension and contraction), flat elastic force curve, and no need for pre-tightening. They are used in molds (especially automotive stamping molds) and can perform tasks that are difficult for conventional elastic components such as metal springs, rubber, and air cushions. They can effectively simplify mold design and manufacturing, facilitate mold installation and adjustment, extend mold service life, and ensure stable product quality.
[0003] Traditional nitrogen spring supports typically rely on a single pneumatic buffer structure to achieve their support function, but they have significant drawbacks in practical use:
[0004] When the support is subjected to a sudden heavy load or impact load, the nitrogen gas inside the cylinder will be compressed instantaneously, causing a sharp increase in gas pressure. If the pressure exceeds the response threshold of the pressure relief valve, the cylinder may burst due to untimely exhaust, resulting in equipment damage or even a safety accident.
[0005] The existing structure lacks active control over the movement of the lifting components, making it impossible to precisely limit the support height of the supports. In high-frequency vibration or reciprocating motion scenarios, the supports are prone to repeatedly bouncing, causing the supported object to rise too high, resulting in collisions with surrounding equipment, affecting processing accuracy or production safety.
[0006] Traditional lifting structures have a simple guiding mechanism, which is prone to tilting or jamming when subjected to eccentric loads or high-frequency vibrations, resulting in uneven force on the nitrogen springs and shortening their service life.
[0007] Therefore, a nitrogen spring support with a limiting structure is proposed. Summary of the Invention
[0008] In order to overcome the above-mentioned defects of the prior art, the present invention provides a nitrogen spring support with a limiting structure to solve the problems mentioned in the background art.
[0009] To achieve the above objectives, this utility model provides the following technical solution: a nitrogen spring support with a limiting structure, including a cylinder, a base plate at the bottom of the cylinder, an intake and exhaust pipe at the bottom end of the base plate, a plurality of support rods at the bottom end of the base plate, a top cover at the top of the cylinder, a lifting assembly connected to the top cover, and a limiting assembly slidably connected to the lifting assembly on the top cover.
[0010] Nitrogen gas is introduced into the cylinder through the intake and exhaust pipes, increasing the internal pressure. When the lifting assembly is under pressure, the high-pressure nitrogen gas supports the lifting assembly. When the force on the lifting assembly decreases, the high-pressure nitrogen gas releases the pressure, causing the lifting assembly to rise and reset.
[0011] When limiting the descent height of the lifting assembly, the top of the limiting component rises, thus limiting the descent of the lifting assembly. This prevents excessive pressure on the lifting assembly, which could cause nitrogen to compress instantaneously, preventing the pressure relief valve from releasing gas in time and leading to cylinder explosion. This improves safety and service life. Conversely, when limiting the ascent of the lifting assembly, the limiting component descends at the end inside the cylinder, thus limiting the ascent of the lifting assembly. This limits the support height of the nitrogen spring support, preventing repeated bouncing that could cause objects supported on the support to rise too high and collide.
[0012] Preferably, the intake and exhaust pipes are equipped with a pressure relief valve and a one-way inflation valve.
[0013] Preferably, the lifting assembly includes a piston, a piston rod, a support body, and guide rods. The piston is slidably disposed inside the cylinder. The piston is connected to the top of the piston, and the support body is installed at the top of the piston rod. Multiple guide rods are arranged in a ring at the bottom of the support body.
[0014] Preferably, the top cover has a shaft hole in the middle and multiple guide holes on the edge of the top cover. The plug rod is slidably connected to the shaft hole, and each guide rod is slidably connected to the corresponding guide hole.
[0015] Preferably, the limiting assembly includes a lifting plate, an electric actuator, a lifting rod, and a limiting plate. The bottom end of the lifting plate is connected to multiple electric actuators mounted on the top cover. The lifting plate is connected to multiple lifting rods, and each of the lifting rods is connected to a limiting plate located inside the cylinder.
[0016] Preferably, the top cover has multiple lifting holes, each of which has a through hole on its outer side. The telescopic end of the electric push rod is slidably connected to the corresponding through hole, and the lifting rod is slidably connected to the corresponding lifting hole.
[0017] The technical effects and advantages of this utility model are as follows:
[0018] The limiting component can limit the descent height of the lifting component, preventing excessive pressure on the lifting component from causing instantaneous compression of nitrogen and preventing the cylinder from bursting due to the inability of the pressure relief valve to release gas in time. This significantly improves the safety and service life of the device. The pressure relief valve installed on the intake and exhaust pipes can release pressure in time when the nitrogen pressure in the cylinder is too high, further reducing the risk of cylinder rupture.
[0019] The limiting component drives the lifting plate and limiting plate to rise and fall via an electric actuator. It can flexibly adjust the limiting position of the lifting component to rise and fall. It can limit the support height of the nitrogen spring support to avoid collisions caused by objects rising too high due to repeated bouncing, and can also precisely control the movement stroke of the lifting component.
[0020] The guide rod in the lifting assembly slides with the guide hole of the top cover, which plays a guiding role when the support body is lowered under force, ensuring its stable vertical movement and improving the overall stability of the device. The elastic support characteristics of nitrogen allow the support body to automatically reset through nitrogen compression and release when the object vibrates, reducing the impact of vibration. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0022] Figure 2 This is a schematic diagram of the cross-sectional structure of this utility model.
[0023] Figure 3 This is a schematic diagram of the lifting component of this utility model.
[0024] Figure 4 This is a schematic diagram of the limiting component of this utility model.
[0025] Figure 5 This is a schematic diagram of the top cover of this utility model.
[0026] The attached diagram is labeled as follows: 1. Cylinder; 2. Base plate; 3. Intake and exhaust pipes; 4. Support rod; 5. Top cover; 6. Lifting assembly; 601. Piston; 602. Piston rod; 603. Support body; 604. Guide rod; 7. Limiting assembly; 701. Lifting plate; 702. Electric actuator; 703. Lifting rod; 704. Limiting plate; 8. Shaft hole; 9. Lifting hole; 10. Through hole; 11. Guide hole. Detailed Implementation
[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0028] As attached Figure 1-5The nitrogen spring support of the limiting structure shown includes a cylinder 1, a base plate 2 at the bottom of the cylinder 1, an intake and exhaust pipe 3 at the bottom end of the base plate 2, a plurality of support rods 4 at the bottom end of the base plate 2, a top cover 5 at the top of the cylinder 1, a lifting assembly 6 connected to the top cover 5, and a limiting assembly 7 slidably connected to the lifting assembly 6 and mounted on the top cover 5.
[0029] In practice, nitrogen gas is introduced into cylinder 1 through intake and exhaust pipe 3, which increases the internal pressure. When the lifting assembly 6 is under pressure, the high-pressure nitrogen gas can support the lifting assembly 6. When the force on the lifting assembly 6 decreases, the high-pressure nitrogen gas releases the pressure, causing the lifting assembly 6 to rise and reset.
[0030] Specifically, when limiting the descent height of the lifting assembly 6, the limiting assembly 7 operates, causing its top to rise, thereby limiting the descent of the lifting assembly 6. This prevents the lifting assembly 6 from being subjected to excessive pressure, which could lead to instantaneous compression of nitrogen and prevent the pressure relief valve from releasing gas in time, thus causing the cylinder 1 to burst. This improves safety and service life. When limiting the ascent of the lifting assembly 6, the limiting assembly 7 operates, causing the end of the limiting assembly 7 inside the cylinder 1 to descend, thereby limiting the ascent of the lifting assembly 6. This limits the support height of the nitrogen spring support, preventing repeated bouncing that could cause the object supported on the support to rise too high and collide with it.
[0031] The intake and exhaust pipes 3 are equipped with a pressure relief valve and a one-way inflation valve.
[0032] In practice, the pressure relief valve can relieve excessive nitrogen pressure in cylinder 1 to prevent cylinder 1 from rupturing due to excessive pressure, while the one-way charging valve is used to charge nitrogen into cylinder 1.
[0033] The lifting assembly 6 includes a piston 601, a piston rod 602, a support body 603, and guide rods 604. The piston 601 is slidably disposed inside the cylinder 1. The piston rod 602 is connected to the top of the piston 601. The support body 603 is installed on the top of the piston rod 602. Multiple guide rods 604 are arranged in a ring at the bottom of the support body 603.
[0034] The top cover 5 has a shaft hole 8 in the middle and multiple guide holes 11 on the edge of the top cover 5. The plug rod 602 is slidably connected to the shaft hole 8 and each guide rod 604 is slidably connected to the corresponding guide hole 11.
[0035] In practice, the pressure generated by the nitrogen gas filling the cylinder 1 supports the piston 601, thereby supporting the object on top of the support body 603. When the object on top vibrates, the support body 603 descends, and the guide rods 604 guide it to ensure that the support body 603 descends stably and vertically, thereby causing the piston 601 to descend and compressing the nitrogen gas. After the vibration disappears, the nitrogen gas releases pressure and causes the piston 601 to rise again, causing the support body 603 to automatically reset.
[0036] The limiting assembly 7 includes a lifting plate 701, an electric push rod 702, a lifting rod 703, and a limiting plate 704. The bottom end of the lifting plate 701 is connected to a plurality of electric push rods 702 installed on the top cover 5. The lifting plate 701 is connected to a plurality of lifting rods 703. Each of the lifting rods 703 is connected to a limiting plate 704 located inside the cylinder 1.
[0037] The top cover 5 has multiple lifting holes 9, and each lifting hole 9 has a through hole 10 on its outer side. The telescopic end of the electric push rod 702 is slidably connected to the corresponding through hole 10, and the lifting rod 703 is slidably connected to the corresponding lifting hole 9.
[0038] In practice, by synchronously extending and retracting each electric actuator 702, the lifting plate 701 and the limiting plate 704 connected by the lifting rod 703 can rise and fall synchronously. Thus, by adjusting the limiting plate 704, the rising height of the piston 601 can be limited, and by adjusting the height position of the lifting plate 701, the falling height of the support body 603 can be limited.
[0039] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A nitrogen gas spring mount with a limit structure, characterized by, The cylinder (1) includes a base plate (2) at the bottom of the cylinder (1), an intake and exhaust pipe (3) at the bottom end of the base plate (2), a plurality of support rods (4) at the bottom end of the base plate (2), a top cover (5) at the top end of the cylinder (1), a lifting assembly (6) connected to the top cover (5), and a limiting assembly (7) slidably connected to the lifting assembly (6) installed on the top cover (5).
2. The position-limiting structure's nitrogen gas spring support according to claim 1, characterized in that, The intake and exhaust pipes (3) are equipped with a pressure relief valve and a one-way inflation valve.
3. The position-limiting structure's nitrogen gas spring support according to claim 2, characterized in that, The lifting assembly (6) includes a piston (601), a piston rod (602), a support body (603), and guide rods (604). The piston (601) is slidably disposed in the cylinder (1). The piston (601) is connected to the piston rod (602) at the top end. The support body (603) is installed at the top end of the piston rod (602). Multiple guide rods (604) are arranged in a ring at the bottom end of the support body (603).
4. The nitrogen spring support for the limiting structure according to claim 3, characterized in that, The top cover (5) has a shaft hole (8) in the middle and multiple guide holes (11) on the edge of the top cover (5). The plug rod (602) is slidably connected to the shaft hole (8) and each guide rod (604) is slidably connected to the corresponding guide hole (11).
5. The nitrogen spring support for the limiting structure according to claim 4, characterized in that, The limiting assembly (7) includes a lifting plate (701), an electric push rod (702), a lifting rod (703), and a limiting plate (704). The bottom end of the lifting plate (701) is connected to a plurality of electric push rods (702) installed on the top cover (5). The lifting plate (701) is connected to a plurality of lifting rods (703). Each of the lifting rods (703) is connected to a limiting plate (704) located inside the cylinder (1).
6. The nitrogen spring support for the limiting structure according to claim 5, characterized in that, The top cover (5) is provided with multiple lifting holes (9), and each lifting hole (9) is provided with a through hole (10) on its outer side. The telescopic end of the electric push rod (702) is slidably connected to the corresponding through hole (10), and the lifting rod (703) is slidably connected to the corresponding lifting hole (9).