CN203453361U - Nitrogen spring - Google Patents
Nitrogen spring Download PDFInfo
- Publication number
- CN203453361U CN203453361U CN201320572482.9U CN201320572482U CN203453361U CN 203453361 U CN203453361 U CN 203453361U CN 201320572482 U CN201320572482 U CN 201320572482U CN 203453361 U CN203453361 U CN 203453361U
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- cylinder body
- piston rod
- ring
- seal ring
- slide bar
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Abstract
The utility model discloses a nitrogen spring. The nitrogen spring comprises a cylinder body; the upper end of the cylinder body is open, and the lower end of the cylinder body is enclosed; the upper end of the cylinder body is fixedly provided with a hollow guide seat; a piston rod penetrates through the guide seat; a gas leakage groove is formed in the inner wall of the cylinder body and is positioned out of the stroke range of the piston rod; the piston rod comprises an upper slide rod and a lower slide rod; the diameter of the lower slide rod is greater than that of the upper slide rod; the upper slide rod is arranged on the guide seat in a sliding mode; the lower slide rod and the inner wall of the cylinder body are matched in a sliding mode; the matched part between the lower slide rod and the inner wall of the cylinder body is provided with a third seal ring. According to the utility model, the gas leakage groove is formed in the cylinder body out of the stroke range of the piston rod, once the piston rod exceeds the stroke range, the third seal ring on the lower slide rod falls into the gas leakage groove, and is sealed and invalid; nitrogen is exhausted from the gas leakage groove to the outside thereby solving the problem of explosion generated by excessive pressure intensity in the nitrogen spring because the piston rod exceeds the stroke range and guaranteeing the safety of the nitrogen spring during the operation.
Description
Technical field
The utility model relates to a kind of nitrogen spring.
Background technique
At present, the piston rod of existing nitrogen spring is stressed along in cylinder body during down sliding, once piston rod surpasses stroke range, the nitrogen pressure in cylinder body can overstep the extreme limit pressure and nitrogen spring is blasted, and has great potential safety hazard.
Model utility content
The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, and a kind of nitrogen spring that can not explode is provided.
The utility model is achieved in that a kind of nitrogen spring, comprises a cylinder body, described cylinder body upper end open, and lower end is airtight;
Described cylinder body upper end is installed with the guide holder of a hollow, is provided with one first seal ring between described guide holder and cylinder body, and described the first seal ring is arranged on the outer wall of described guide holder;
On described guide holder, be equipped with a piston rod, be provided with one second seal ring between described guide holder and piston rod, described the second seal ring is arranged on the inwall of described guide holder;
Described inboard wall of cylinder block offers a disappointing groove, and described disappointing groove is positioned at outside the stroke range of described piston rod;
Described piston rod comprises a upper slide bar and a lower slide bar, the diameter of described lower slide bar is greater than the diameter of described upper slide bar, described upper slide bar is slidedly arranged on described guide holder, described lower slide bar and described inboard wall of cylinder block are slidably matched, and the cooperation place between described lower slide bar and described inboard wall of cylinder block is provided with one the 3rd seal ring;
Described cylinder base offers a vertical pore and a horizontal pore being communicated with described vertical pore, in described horizontal pore, is provided with a gas charging valve;
Described cylinder base also offers a bleeder port that does not run through described cylinder base, and described bleeder port separates by a thin-walled and described cylinder interior.
Particularly, described disappointing groove arrives the little 5mm of distance on described piston rod top to the distance on described cylinder body top than described piston rod bottom.
Further, be also provided with from top to bottom an outer dust ring, a jump ring and one first back-up ring between described guide holder and cylinder body, described the first back-up ring and described the first seal ring fit together.
Further, be also provided with from top to bottom an interior dust ring, a guidance tape and one second back-up ring between described guide holder and piston rod, described the second back-up ring and described the second seal ring fit together.
Particularly, the cross section of described the 3rd seal ring is U-shaped or Y type.
Further, the cooperation place between described lower slide bar and described inboard wall of cylinder block is provided with a guide ring.
The utility model is by offering disappointing groove on the cylinder body outside the stroke range of piston rod, once piston rod surpasses stroke range, the 3rd seal ring on lower slide bar can fall in the groove that loses heart, the 3rd seal ring seal failure, nitrogen is discharged outside to by the groove that loses heart, thereby solved because piston rod surpasses stroke range, cause the excessive problem that produces blast of nitrogen spring internal pressure, guarantee nitrogen spring safety in the course of the work.
In addition, the utility model is by offering a vertical pore and a horizontal pore being communicated with vertical pore in cylinder base, and at horizontal pore, one horizontally disposed gas charging valve is installed, rather than gas charging valve is vertically installed, therefore reduced the length of cylinder body, and then reduced the length of nitrogen spring, be applicable to the strict occasion of spring length requirement.
In addition, the utility model is offered a bleeder port in cylinder base, and a thin-walled is set between bleeder port and cylinder interior, nitrogen spring can be brought some greasy dirts (oil, water, etc. liquid) into and enter into cylinder interior in the process working long hours, cause cylinder interior volume to reduce, thereby cylinder interior pressure is increased, when pressure surpasses critical value, can destroy the thin-walled of cylinder base, nitrogen releases from bleeder port, thereby avoided causing because nitrogen pressure is excessive nitrogen spring blast, guaranteed handling safety.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a kind of nitrogen spring of providing of the utility model embodiment.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technological scheme in the utility model embodiment is clearly and completely described.
As shown in Figure 1, a kind of nitrogen spring that the utility model embodiment provides, comprise a cylinder body 1, cylinder body 1 upper end open, lower end is airtight, cylinder body 1 upper end is installed with the guide holder 2 of a hollow, is provided with the outer wall that one first seal ring 21, the first seal rings 21 are arranged on guide holder 2 between guide holder 2 and cylinder body 1; On guide holder 2, be equipped with a piston rod 3, between guide holder 2 and piston rod 3, be provided with the inwall that one second seal ring 22, the second seal rings 22 are arranged on guide holder 2; Cylinder body 1 inwall offers a disappointing groove 11, and the groove 11 that loses heart is positioned at outside the stroke range of piston rod 3; Piston rod 3 comprises a upper slide bar 31 and a lower slide bar 32, the diameter of lower slide bar 32 is greater than the diameter of upper slide bar 31, upper slide bar 31 is slidedly arranged on guide holder 2, and lower slide bar 32 is slidably matched with cylinder body 1 inwall, and the cooperation place between lower slide bar 32 and cylinder body 1 inwall is provided with one the 3rd seal ring 33; Cylinder body 1 bottom offers a vertical pore 12 and a horizontal pore 13 being communicated with vertical pore 12, is provided with a gas charging valve 4 in horizontal pore 13; Cylinder body 1 bottom also offers a bleeder port 14 that does not run through cylinder body 1 bottom, and bleeder port 14 separates with cylinder body 1 inside by a thin-walled 15.
Working principle of the present utility model is: a space is formed on lower slide bar 32 bottoms of cylinder body 1 bottom and piston rod 3, space inflated with nitrogen by from cylinder body 1 bottom gas charging valve 5 to the lower slide bar 32 bottoms formation of cylinder body 1 bottom and piston rod 3, when the nitrogen filling reaches certain highpressure, nitrogen forms the bottom that a kind of powerful thrust making progress imposes on piston rod 3, makes tightly butt of the upper end of lower slide bar 32 of piston rod 3 and guide holder 2 lower ends.When piston rod 3 is subject to extraneous pressure, ambient pressure can be by the nitrogen compression in cylinder body 1, when nitrogen is in the situation that being compressed to the limit, piston rod 3 can surpass stroke range, once piston rod 3 surpasses stroke range, the 3rd seal ring 33 on lower slide bar 32 can fall in the groove 11 that loses heart, the 3rd seal ring 33 seal failures, nitrogen is discharged outside to by the groove 11 that loses heart, thereby prevents that nitrogen spring from, because of excessive blast of cylinder body 1 internal pressure, having guaranteed nitrogen spring safety in the course of the work.
In addition, the utility model is by offering a vertical pore 12 and a horizontal pore 13 being communicated with vertical pore 12 in cylinder body 1 bottom, and at the horizontally disposed gas charging valve 4 of the interior installation one of horizontal pore 13, rather than gas charging valve 4 is vertically installed, therefore reduced the length of cylinder body 1, and then reduced the length of nitrogen spring, be applicable to the strict occasion of spring length requirement.
In addition, the utility model is offered a bleeder port 14 in cylinder body 1 bottom, and between bleeder port 14 and cylinder body 1 inside, a thin-walled 15 is set, nitrogen spring can be brought some greasy dirts (oil, water, etc. liquid) into and enter into cylinder body 1 inside in the process working long hours, cause cylinder body 1 internal capacity to reduce, thereby cylinder body 1 internal pressure is increased, when pressure surpasses critical value, can destroy the thin-walled 15 of cylinder body 1 bottom, nitrogen releases from bleeder port 14, thereby avoided causing because nitrogen pressure is excessive nitrogen spring blast, guaranteed handling safety.
Particularly, described disappointing groove 11 arrives the little 5mm of distance on piston rod 3 tops to the distance on cylinder body 1 top than piston rod 3 bottoms, thereby guarantee piston rod 3 to slide up and down in normal stroke range and can not make the 3rd seal ring 33 can fall in disappointing groove 11, having guaranteed the normal operation of nitrogen spring.
Further, between described guide holder 2 and cylinder body 1, being also provided with from top to bottom an outer dust ring 23, a jump ring 24 and one first back-up ring 25, the first back-up rings 25 and the first seal ring 21 fits together.Wherein, outer dust ring 23 enters in cylinder body 1 for preventing extraneous dust, and jump ring 24, for guide holder 2 being fixed to cylinder body 1, the first back-up ring 25 for the first seal ring 21 is fixedly positioning, further improves the sealing effect of the first seal ring 21.
Further, between described guide holder 2 and piston rod 3, being also provided with from top to bottom an interior dust ring 26, a guidance tape 27 and one second back-up ring 28, the second back-up rings 28 and the second seal ring 22 fits together.Wherein, interior dust ring 26 enters in cylinder body 1 for preventing extraneous dust, and guidance tape 27 is for sliding up and down of piston rod 3 led, and the second back-up ring 28, for the second seal ring 22 is fixedly positioning, further improves the sealing effect of the second seal ring 22.
Further, the cross section of described the 3rd seal ring 23 is U-shaped or Y type, plays the effect of enhanced leaktightness effect.
Further, the cooperation place between described lower slide bar 32 and cylinder body 1 inwall is provided with a guide ring 34, and guide ring 34 plays the effect that lower slide bar 32 is led.
The above is preferred implementation of the present utility model; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of the utility model principle; can also make some improvements and modifications, these improvements and modifications are also considered as protection domain of the present utility model.
Claims (6)
1. a nitrogen spring, is characterized in that, comprises a cylinder body, described cylinder body upper end open, and lower end is airtight;
Described cylinder body upper end is installed with the guide holder of a hollow, is provided with one first seal ring between described guide holder and cylinder body, and described the first seal ring is arranged on the outer wall of described guide holder;
On described guide holder, be equipped with a piston rod, be provided with one second seal ring between described guide holder and piston rod, described the second seal ring is arranged on the inwall of described guide holder;
Described inboard wall of cylinder block offers a disappointing groove, and described disappointing groove is positioned at outside the stroke range of described piston rod;
Described piston rod comprises a upper slide bar and a lower slide bar, the diameter of described lower slide bar is greater than the diameter of described upper slide bar, described upper slide bar is slidedly arranged on described guide holder, described lower slide bar and described inboard wall of cylinder block are slidably matched, and the cooperation place between described lower slide bar and described inboard wall of cylinder block is provided with one the 3rd seal ring;
Described cylinder base offers a vertical pore and a horizontal pore being communicated with described vertical pore, in described horizontal pore, is provided with a gas charging valve;
Described cylinder base also offers a bleeder port that does not run through described cylinder base, and described bleeder port separates by a thin-walled and described cylinder interior.
2. a kind of nitrogen spring according to claim 1, is characterized in that, described disappointing groove arrives the little 5mm of distance on described piston rod top to the distance on described cylinder body top than described piston rod bottom.
3. a kind of nitrogen spring according to claim 1, is characterized in that, is also provided with from top to bottom an outer dust ring, a jump ring and one first back-up ring between described guide holder and cylinder body, and described the first back-up ring and described the first seal ring fit together.
4. a kind of nitrogen spring according to claim 1, is characterized in that, is also provided with from top to bottom an interior dust ring, a guidance tape and one second back-up ring between described guide holder and piston rod, and described the second back-up ring and described the second seal ring fit together.
5. a kind of nitrogen spring according to claim 1, is characterized in that, the cross section of described the 3rd seal ring is U-shaped or Y type.
6. a kind of nitrogen spring according to claim 1, is characterized in that, the cooperation place between described lower slide bar and described inboard wall of cylinder block is provided with a guide ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320572482.9U CN203453361U (en) | 2013-09-16 | 2013-09-16 | Nitrogen spring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320572482.9U CN203453361U (en) | 2013-09-16 | 2013-09-16 | Nitrogen spring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203453361U true CN203453361U (en) | 2014-02-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320572482.9U Expired - Fee Related CN203453361U (en) | 2013-09-16 | 2013-09-16 | Nitrogen spring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203453361U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104632977A (en) * | 2015-01-30 | 2015-05-20 | 常州市达文电动车辆配件厂 | Air pressure damping mechanism and air pressure damping shock absorber with the same |
| CN104676243A (en) * | 2015-03-24 | 2015-06-03 | 隆昌山川精密焊管有限责任公司 | Classified gas-inflating method for gas spring and tool for method |
| CN105134859A (en) * | 2015-09-24 | 2015-12-09 | 上海雷瑟尔精密机械有限公司 | No-voltage protection type nitrogen spring |
| CN107504119A (en) * | 2017-08-01 | 2017-12-22 | 江苏耐玛鑫精密机械有限公司 | A kind of overtravel uses self-relieving nitrogen spring |
| CN107763130A (en) * | 2016-08-18 | 2018-03-06 | 大连精维液压技术有限公司 | Unitary adjustable section postpones nitrogen spring |
| CN108105310A (en) * | 2016-11-24 | 2018-06-01 | 江苏耐玛鑫精密机械有限公司 | Two section of one kind or more piece piston rod type nitrogen gas spring |
| CN108397502A (en) * | 2018-05-02 | 2018-08-14 | 江苏耐玛鑫精密机械有限公司 | A kind of nitrogen tension spring |
| CN110131347A (en) * | 2019-06-12 | 2019-08-16 | 重庆特力普尔机械设备有限公司 | A kind of nitrogen gas spring with multiple protection functions |
| CN111750020A (en) * | 2020-06-16 | 2020-10-09 | 无锡卡斯德金属科技有限公司 | High-temperature-resistant nitrogen spring |
-
2013
- 2013-09-16 CN CN201320572482.9U patent/CN203453361U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104632977A (en) * | 2015-01-30 | 2015-05-20 | 常州市达文电动车辆配件厂 | Air pressure damping mechanism and air pressure damping shock absorber with the same |
| CN104676243A (en) * | 2015-03-24 | 2015-06-03 | 隆昌山川精密焊管有限责任公司 | Classified gas-inflating method for gas spring and tool for method |
| CN105134859A (en) * | 2015-09-24 | 2015-12-09 | 上海雷瑟尔精密机械有限公司 | No-voltage protection type nitrogen spring |
| CN107763130A (en) * | 2016-08-18 | 2018-03-06 | 大连精维液压技术有限公司 | Unitary adjustable section postpones nitrogen spring |
| CN108105310A (en) * | 2016-11-24 | 2018-06-01 | 江苏耐玛鑫精密机械有限公司 | Two section of one kind or more piece piston rod type nitrogen gas spring |
| CN107504119A (en) * | 2017-08-01 | 2017-12-22 | 江苏耐玛鑫精密机械有限公司 | A kind of overtravel uses self-relieving nitrogen spring |
| CN108397502A (en) * | 2018-05-02 | 2018-08-14 | 江苏耐玛鑫精密机械有限公司 | A kind of nitrogen tension spring |
| CN110131347A (en) * | 2019-06-12 | 2019-08-16 | 重庆特力普尔机械设备有限公司 | A kind of nitrogen gas spring with multiple protection functions |
| CN110131347B (en) * | 2019-06-12 | 2024-02-02 | 重庆特力普尔机械设备有限公司 | Nitrogen spring with multiple protection function |
| CN111750020A (en) * | 2020-06-16 | 2020-10-09 | 无锡卡斯德金属科技有限公司 | High-temperature-resistant nitrogen spring |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140226 Termination date: 20150916 |
|
| EXPY | Termination of patent right or utility model |