CN113124081A - Novel nitrogen spring - Google Patents
Novel nitrogen spring Download PDFInfo
- Publication number
- CN113124081A CN113124081A CN202110449189.2A CN202110449189A CN113124081A CN 113124081 A CN113124081 A CN 113124081A CN 202110449189 A CN202110449189 A CN 202110449189A CN 113124081 A CN113124081 A CN 113124081A
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- China
- Prior art keywords
- cylinder
- sealing
- cylinder barrel
- novel nitrogen
- gasket
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/02—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum
- F16F9/0209—Telescopic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/02—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum
- F16F9/0209—Telescopic
- F16F9/0236—Telescopic characterised by having a hollow piston rod
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/02—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum
- F16F9/0209—Telescopic
- F16F9/0281—Details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/3207—Constructional features
- F16F9/3235—Constructional features of cylinders
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/3207—Constructional features
- F16F9/3235—Constructional features of cylinders
- F16F9/3242—Constructional features of cylinders of cylinder ends, e.g. caps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/36—Special sealings, including sealings or guides for piston-rods
- F16F9/362—Combination of sealing and guide arrangements for piston rods
- F16F9/363—Combination of sealing and guide arrangements for piston rods the guide being mounted between the piston and the sealing, enabling lubrication of the guide
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/43—Filling or drainage arrangements, e.g. for supply of gas
- F16F9/437—Drainage arrangements
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Devices (AREA)
Abstract
The invention provides a novel nitrogen spring which comprises a base, wherein two sides of the top of the base are in threaded connection with first connecting rods, sealing gaskets are fixedly arranged at the tops of the two first connecting rods, an air cylinder is sleeved at the top of the sealing gasket on one side of each first connecting rod, the top of the air cylinder is in sealing connection with a bottom cover, a cylinder barrel is sleeved at the top of the sealing gasket on the other side of each first connecting rod, a sealing mechanism is connected to the top of the cylinder barrel in a sliding mode and comprises a guide sleeve connected to the top of the cylinder barrel in a sliding mode, a piston rod is connected to the middle of. The invention provides a novel nitrogen spring, which is provided with an anti-slip gasket in a closed mechanism to reduce the falling speed of a guide sleeve, balance the pressure in a cylinder barrel, avoid part damage caused by unbalanced pressure, prevent gas leakage in the cylinder barrel by virtue of a closed rubber gasket and a closed rubber ring, and reduce the compression of the pressure in the cylinder barrel on a first connecting rod by virtue of a pressure-reducing rubber gasket.
Description
Technical Field
The invention belongs to the technical field of nitrogen springs, and particularly relates to a novel nitrogen spring.
Background
The nitrogen spring special for the die is a novel elastic component taking high-pressure nitrogen as a working medium, has small volume, large elasticity, long stroke, stable work, precise manufacture, long service life, gentle elasticity curve, no need of pre-tightening and the like, and has the work which is difficult to finish by conventional elastic components such as metal springs, rubber, air cushions and the like. The existing nitrogen gas spring generally pumps gas in the cylinder barrel through the cylinder, and works in a mode of jacking a top object by utilizing compressed ascending gas pressure through changing the pressure of the gas pressure in the cylinder barrel, and if the gas leakage phenomenon occurs in the cylinder barrel, the pressure of the internal gas pressure is unbalanced, so that the nitrogen gas spring cannot be well applied to precise medical equipment.
Disclosure of Invention
The invention aims to provide a novel nitrogen spring, and aims to solve the problem that in the prior art, if the phenomenon of air leakage occurs in a cylinder barrel, the internal air pressure is unbalanced, and the novel nitrogen spring cannot be well applied to precise medical equipment.
In order to achieve the purpose, the invention provides the following technical scheme: the sealing device comprises a base, base top both sides threaded connection has the head rod, two head rod top fixed mounting has airtight packing ring, head rod one side seal ring top cover is equipped with the cylinder, cylinder top sealing connection has the bottom, head rod opposite side airtight packing ring top cover is equipped with the cylinder, cylinder top sliding connection has airtight mechanism, airtight mechanism includes sliding connection in the uide bushing at cylinder top, the uide bushing middle part interlude is connected with the piston rod, piston rod bottom fixed mounting has the second connecting rod, the uide bushing top is equipped with the gland.
In order to pump air to the cylinder barrel, the preferable nitrogen spring is provided with an air outlet pipe connected with one side of the air cylinder in a pipe mode, and the other end of the air outlet pipe is communicated with one side of the cylinder barrel in a sealing mode.
In order to prevent the gland from falling, the novel nitrogen spring is preferable, the inner wall of the top of the cylinder barrel is provided with a clamping groove, the middle part of the gland is sleeved with a clamp spring, and the clamp spring is connected with the clamping groove in a clamping manner.
In order to reduce the top pressure of the first connecting rod, the novel nitrogen spring is preferably used, the sealing gasket is composed of a decompression rubber gasket and a sealing rubber gasket, the decompression rubber gasket is sleeved at the top of the first connecting rod, and the sealing rubber gasket is embedded at the top of the decompression rubber gasket.
In order to balance the pressure in the cylinder barrel, the novel nitrogen spring is preferably used, the middle of the guide sleeve is sleeved with the closed rubber ring, and the top of the closed rubber ring is provided with the anti-skidding gasket.
In order to release the air pressure in the cylinder barrel, the piston rod is preferably of a hollow structure, and the top of the piston rod is embedded with the thimble.
In order to facilitate the sliding of the guide sleeve, the cylinder barrel is preferably filled with lubricating oil as a novel nitrogen spring of the invention.
Compared with the prior art, the invention has the beneficial effects that:
1) the falling speed of the guide sleeve is reduced by the anti-slip gasket arranged in the closed mechanism, the pressure in the cylinder barrel is balanced in the operation process, the initial force is equal to the maximum force, the pressure in the cylinder barrel is equal to the top pressure of the piston rod, the damage to parts caused by unbalanced pressure is avoided, and the spring can be applied to precise medical equipment;
2) the airtight rubber gasket and the airtight rubber ring are arranged to prevent gas in the cylinder barrel from leaking, and the pressure reducing rubber gasket is arranged to reduce the compression of the pressure in the cylinder barrel on the first connecting rod.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic cross-sectional view of the present invention;
FIG. 3 is a schematic view of a hermetic gasket according to the present invention;
FIG. 4 is a schematic structural diagram of a sealing mechanism according to the present invention;
in the figure: 1. a base; 2. a first connecting rod; 3. a sealing gasket; 31. a pressure reducing rubber gasket; 32. sealing the rubber pad; 4. a cylinder; 5. a bottom cover; 6. an air outlet pipe; 7. a cylinder barrel; 8. a sealing mechanism; 81. a guide sleeve; 811. sealing the rubber ring; 812. an anti-slip washer; 82. a piston rod; 821. a thimble; 83. a second connecting rod; 84. a gland; 85. and a clamp spring.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, the present invention provides the following technical solutions: including base 1, base 1 top both sides threaded connection has head rod 2, 2 top fixed mounting of two head rods has airtight packing ring 3, 2 one side of head rod packing ring top cover is equipped with cylinder 4, 4 top sealing connection of cylinder have bottom 5, 3 top covers of 2 opposite side airtight packing ring of head rod are equipped with cylinder 7, cylinder 7 top sliding connection has airtight mechanism 8, airtight mechanism 8 includes sliding connection in the uide bushing 81 at cylinder 7 top, the uide bushing 81 middle part interlude is connected with piston rod 82, piston rod 82 bottom fixed mounting has second connecting rod 83, uide bushing 81 top is equipped with gland 84.
Preferably, one side of the cylinder 4 is connected with an air outlet pipe 6 in a pipe mode, and the other end of the air outlet pipe 6 is communicated with one side of the cylinder barrel 7 in a sealing mode.
When the pneumatic cylinder is used specifically, the air cylinder 4 pumps air in the cylinder barrel 7 through the air outlet pipe 6, and the second connecting rod 83 is ejected upwards by air pressure through changing the pressure of the air pressure.
Preferably, a clamping groove is formed in the inner wall of the top of the cylinder barrel 7, a clamping spring 85 is sleeved in the middle of the pressing cover 84, and the clamping spring 85 is connected with the clamping groove in a clamping mode.
During the specific use, inside atmospheric pressure drives second connecting rod 83 rebound, and jump ring 85 on the gland 84 and draw-in groove carry out the block, play limiting displacement and prevent that jump ring 85 from falling.
Preferably, the sealing washer 3 is composed of a decompression rubber washer 31 and a sealing rubber pad 32, the decompression rubber washer 31 is sleeved on the top of the first connecting rod 2, and the sealing rubber pad 32 is embedded on the top of the decompression rubber washer 31.
During the specific use, when cylinder 4 pumps gas in to cylinder 7, because gas is compressed, from the top down pressure acts on decompression rubber packing ring 31, decompression rubber packing ring 31 dispersion pressure avoids bottom head rod 2 pressure to concentrate and damage, and airtight rubber pad 32 prevents inside gas loss.
Preferably, the middle part of the guide sleeve 81 is sleeved with a closed rubber ring 811, and the top of the closed rubber ring 811 is provided with an anti-skid gasket 812.
When the air pressure balance device is used specifically, air pressure in the cylinder barrel 7 pushes upwards, pressure from the top of the piston rod 82 pushes downwards, the closed rubber ring 811 prevents air flow loss, the anti-skid washer 812 slows down the falling speed of the guide sleeve 81, and the pressure in the balance cylinder barrel 7 is balanced.
Preferably, the piston rod 82 is a hollow structure, and a thimble 821 is embedded in the top of the piston rod 82.
In a specific use, the thimble 821 is taken out from the top of the piston rod 82, and the air flow in the cylinder 7 flows out along the top of the piston rod 82.
Preferably, the cylinder tube 7 is filled with lubricating oil.
When the air pressure balance adjusting device is used specifically, lubricating oil facilitates the downward sliding of the bottom of the guide sleeve 81 in the cylinder barrel 7, and the air pressure balance is changed.
The working principle is as follows: the cylinder 4 pumps air into the cylinder barrel 7 through the air outlet pipe 6, the air pressure in the cylinder barrel 7 drives the second connecting rod 83 to move upwards, the snap spring 85 on the pressing cover 84 is clamped with the clamping groove to play a limiting role to prevent the snap spring 85 from falling, the pressure from the top of the piston rod 82 pushes downwards, the closed rubber ring 811 prevents air flow loss, the anti-slip gasket 812 slows down the falling speed of the guide sleeve 81, slowly adjusts the pressure balance in the balance cylinder barrel 7 to ensure that the acting force at the top of the piston rod 82 is equal to the pressure in the cylinder barrel 7, and keeps the balance of the forces in, because the gas in the cylinder 7 is compressed, the pressure acts on the decompression rubber gasket 31 from top to bottom, the decompression rubber gasket 31 disperses the pressure to avoid the damage caused by the pressure concentration of the first connecting rod 2 at the bottom, the airtight rubber gasket 32 prevents the loss of the gas in the cylinder, and after the use is finished, the thimble 821 at the top of the piston rod 82 is pulled out to release the gas in the cylinder 7.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides a novel nitrogen gas spring, includes base (1), its characterized in that: base (1) top both sides threaded connection has head rod (2), two head rod (2) top fixed mounting has airtight packing ring (3), head rod (2) one side sealing packing ring top cover is equipped with cylinder (4), cylinder (4) top sealing connection has bottom (5), head rod (2) opposite side airtight packing ring (3) top cover is equipped with cylinder (7), cylinder (7) top sliding connection has airtight mechanism (8), airtight mechanism (8) are including sliding connection in uide bushing (81) at cylinder (7) top, uide bushing (81) middle part interlude is connected with piston rod (82), piston rod (82) bottom fixed mounting has second connecting rod (83), uide bushing (81) top is equipped with gland (84).
2. The novel nitrogen spring as claimed in claim 1, wherein: and an air outlet pipe (6) is connected to one side of the air cylinder (4) in a pipe manner, and the other end of the air outlet pipe (6) is communicated with one side of the cylinder barrel (7) in a sealing manner.
3. The novel nitrogen spring as claimed in claim 1, wherein: the inner wall of the top of the cylinder barrel (7) is provided with a clamping groove, the middle of the gland (84) is sleeved with a clamp spring (85), and the clamp spring (85) is connected with the clamping groove in a clamping mode.
4. The novel nitrogen spring as claimed in claim 1, wherein: the sealing gasket (3) is composed of a decompression rubber gasket (31) and a sealing rubber pad (32), the decompression rubber gasket (31) is sleeved on the top of the first connecting rod (2), and the sealing rubber pad (32) is embedded on the top of the decompression rubber gasket (31).
5. The novel nitrogen spring as claimed in claim 1, wherein: the middle of the guide sleeve (81) is sleeved with a closed rubber ring (811), and the top of the closed rubber ring (811) is provided with an anti-slip gasket (812).
6. The novel nitrogen spring as claimed in claim 1, wherein: the piston rod (82) is of a hollow structure, and a thimble (821) is embedded in the top of the piston rod (82).
7. The novel nitrogen spring as claimed in claim 1, wherein: and lubricating oil is filled in the cylinder barrel (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110449189.2A CN113124081A (en) | 2021-04-25 | 2021-04-25 | Novel nitrogen spring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110449189.2A CN113124081A (en) | 2021-04-25 | 2021-04-25 | Novel nitrogen spring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113124081A true CN113124081A (en) | 2021-07-16 |
Family
ID=76780124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110449189.2A Pending CN113124081A (en) | 2021-04-25 | 2021-04-25 | Novel nitrogen spring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113124081A (en) |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060096819A1 (en) * | 2003-04-11 | 2006-05-11 | Marcus Cronholm | Gas spring |
| DE102005038765A1 (en) * | 2005-08-17 | 2007-03-15 | Stabilus Gmbh | Tension spring arrangement for motor vehicle, has movable piston arranged in cylinder space for separating space into piston rod distant working chamber and rod near working chamber, where valve device is arranged in near working chamber |
| CN204493556U (en) * | 2015-03-11 | 2015-07-22 | 邱文辉 | Novel nitrogen spring |
| CN205155013U (en) * | 2015-10-27 | 2016-04-13 | 江苏今达纺织实业有限公司 | Reaction rate adjustable let -off mechanism buffer |
| CN206072201U (en) * | 2016-08-31 | 2017-04-05 | 江苏朗域电力科技有限公司 | A kind of steel mill's vibroshock |
| CN107035805A (en) * | 2017-04-28 | 2017-08-11 | 东莞市博鼎精密机械制造有限公司 | One kind delay nitrogen spring device |
| CN206988213U (en) * | 2017-06-07 | 2018-02-09 | 福建省龙岩液压集团有限公司 | A kind of oil cylinder interval nested structure |
| CN208503337U (en) * | 2018-06-14 | 2019-02-15 | 合肥济春机电科技有限公司 | A kind of novel damping formula nitrogen gas spring |
| CN209278376U (en) * | 2018-12-07 | 2019-08-20 | 常州市莱特气弹簧有限公司 | From buffering air-leg |
| CN209278380U (en) * | 2018-12-22 | 2019-08-20 | 常州市莱特气弹簧有限公司 | A kind of reusable air-leg |
| CN209430660U (en) * | 2018-12-03 | 2019-09-24 | 常州市莱特气弹簧有限公司 | Air-leg with noise reduction piston |
| CN210240406U (en) * | 2019-07-03 | 2020-04-03 | 常州市东力机械有限公司 | High-strength nitrogen spring |
| CN211231396U (en) * | 2019-12-24 | 2020-08-11 | 四川欣悦精工科技有限公司 | Nitrogen spring connected with gas storage tank |
| CN213039733U (en) * | 2020-07-14 | 2021-04-23 | 安徽钢睿精密科技有限公司 | Nitrogen spring |
| CN213088603U (en) * | 2020-09-18 | 2021-04-30 | 深圳市大通精密五金有限公司 | High-precision spring device with sink-proof groove |
-
2021
- 2021-04-25 CN CN202110449189.2A patent/CN113124081A/en active Pending
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060096819A1 (en) * | 2003-04-11 | 2006-05-11 | Marcus Cronholm | Gas spring |
| DE102005038765A1 (en) * | 2005-08-17 | 2007-03-15 | Stabilus Gmbh | Tension spring arrangement for motor vehicle, has movable piston arranged in cylinder space for separating space into piston rod distant working chamber and rod near working chamber, where valve device is arranged in near working chamber |
| CN204493556U (en) * | 2015-03-11 | 2015-07-22 | 邱文辉 | Novel nitrogen spring |
| CN205155013U (en) * | 2015-10-27 | 2016-04-13 | 江苏今达纺织实业有限公司 | Reaction rate adjustable let -off mechanism buffer |
| CN206072201U (en) * | 2016-08-31 | 2017-04-05 | 江苏朗域电力科技有限公司 | A kind of steel mill's vibroshock |
| CN107035805A (en) * | 2017-04-28 | 2017-08-11 | 东莞市博鼎精密机械制造有限公司 | One kind delay nitrogen spring device |
| CN206988213U (en) * | 2017-06-07 | 2018-02-09 | 福建省龙岩液压集团有限公司 | A kind of oil cylinder interval nested structure |
| CN208503337U (en) * | 2018-06-14 | 2019-02-15 | 合肥济春机电科技有限公司 | A kind of novel damping formula nitrogen gas spring |
| CN209430660U (en) * | 2018-12-03 | 2019-09-24 | 常州市莱特气弹簧有限公司 | Air-leg with noise reduction piston |
| CN209278376U (en) * | 2018-12-07 | 2019-08-20 | 常州市莱特气弹簧有限公司 | From buffering air-leg |
| CN209278380U (en) * | 2018-12-22 | 2019-08-20 | 常州市莱特气弹簧有限公司 | A kind of reusable air-leg |
| CN210240406U (en) * | 2019-07-03 | 2020-04-03 | 常州市东力机械有限公司 | High-strength nitrogen spring |
| CN211231396U (en) * | 2019-12-24 | 2020-08-11 | 四川欣悦精工科技有限公司 | Nitrogen spring connected with gas storage tank |
| CN213039733U (en) * | 2020-07-14 | 2021-04-23 | 安徽钢睿精密科技有限公司 | Nitrogen spring |
| CN213088603U (en) * | 2020-09-18 | 2021-04-30 | 深圳市大通精密五金有限公司 | High-precision spring device with sink-proof groove |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210716 |
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| RJ01 | Rejection of invention patent application after publication |