CN212389682U - A gas spring with overspeed protection safety - Google Patents
A gas spring with overspeed protection safety Download PDFInfo
- Publication number
- CN212389682U CN212389682U CN202020427139.5U CN202020427139U CN212389682U CN 212389682 U CN212389682 U CN 212389682U CN 202020427139 U CN202020427139 U CN 202020427139U CN 212389682 U CN212389682 U CN 212389682U
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- Prior art keywords
- boss
- guide sleeve
- cylinder body
- overspeed protection
- protection safety
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 44
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 9
- 238000009434 installation Methods 0.000 claims description 8
- 239000000428 dust Substances 0.000 claims description 7
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 16
- 230000015572 biosynthetic process Effects 0.000 abstract description 4
- 230000003068 static effect Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
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Abstract
The utility model discloses a nitrogen spring with overspeed protection safety, which comprises a cylinder body, a guide sleeve and a piston rod, wherein the guide sleeve and the piston rod are fixedly arranged at the upper end of the cylinder body through a snap spring; the periphery of the guide sleeve is also provided with a containing groove for containing the second boss after fracture or containing the second boss which deforms and extends downwards or containing the snap spring, and the containing groove is positioned below the second boss and forms a first cavity communicated with the atmosphere with the inner wall of the upper end of the cylinder body. When overspeed return many times, form when assaulting many times, the second boss can break at first in order to get into and accomodate the groove, and the uide bushing can move up to accomodate the groove and static after the jump ring contact, and the uide bushing can outwards fly out, and the uide bushing main objective of moving up is with the cylinder body formation clearance in order to release pressure, prevents that the occurence of failure from taking place, reaches the purpose of overspeed protection, and is safe in utilization.
Description
Technical Field
The utility model relates to an elastic element product technical field refers in particular to a nitrogen gas spring with overspeed protection safety.
Background
With the continuous progress of science and technology, the demand of the industrial field for elastic elements is higher and higher, and the elastic elements are required to meet various requirements of mechanical structures and also to be miniaturized and have high performance.
The conventional elastic elements used in the prior art, such as springs, elastic rubber, air cushions and the like, generate elastic force which is increased in proportion to the increase of the compression amount and cannot keep constant pressure in the working process, the telescopic stroke is small, a lot of processes need constant elastic change, the conventional elastic elements bring great influence and limitation to the process design requirements, the process requirements cannot be met, the product quality and the efficiency are directly influenced, and the production cost is greatly improved.
The nitrogen spring in the prior art can solve the problems, at present, the nitrogen spring used in various industries in China is mainly imported, a die nitrogen spring (a stamping nitrogen spring or a nitrogen cylinder for short) is a novel elastic element using high-pressure nitrogen as a working medium, and the nitrogen spring has the advantages of small volume, large elasticity, long stroke, stable work, precise manufacture, long service life, mild elastic curve, no need of pre-tightening and the like, has the work which is difficult to complete by conventional elastic components such as a metal spring, rubber, an air cushion and the like, simplifies the design and manufacture of a die, is convenient to install and adjust the die, prolongs the service life of the die, ensures the stability of product quality, and is a new generation of optimal elastic component with flexibility.
The conventional nitrogen spring is constructed as shown in fig. 1, and is installed in a punching die for use, when a punch is pressed down, a plunger rod 101 of the nitrogen spring 100 moves downward, when an external force is removed, the plunger rod 101 moves upward to return to an upper dead point, and a boss 102 protruding outward from a lower end of the plunger rod 101 is stationary when contacting a guide sleeve 103. If the external force is removed quickly, the plunger rod 101 returns to the upper dead point at a high speed, and a large impact force is formed between the boss 102 of the plunger rod 101 rebounded at a high speed and the stationary guide sleeve 103 at this time, and the boss 102 of the plunger rod 101 is easily broken due to the impact force, as shown in fig. 2, after the boss 102 of the plunger rod 101 is broken, the plunger rod 101 flies out, so that equipment damage or human injury accidents are easily caused, and great trouble is caused to a user.
In view of the above, the present inventors propose the following.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art not enough, provide a nitrogen gas spring with overspeed protection safety.
In order to solve the technical problem, the utility model discloses a following technical scheme: the nitrogen spring with overspeed protection safety comprises a cylinder body, a guide sleeve fixedly arranged at the upper end of the cylinder body through a clamp spring, and a piston rod arranged in the cylinder body and penetrating through the guide sleeve, wherein a first boss for preventing the piston rod from being separated from the guide sleeve is formed on the periphery of the lower end of the piston rod; the guide sleeve is also provided with a storage groove for storing the second boss after fracture or storing the second boss which deforms and extends downwards or storing the snap spring, and the storage groove is positioned below the second boss and forms a first cavity communicated with the atmosphere with the inner wall of the upper end of the cylinder body.
Furthermore, in the above technical scheme, the upper end of the second boss is provided with an arc-shaped surface, and the clamp spring is arranged on the arc-shaped surface.
Furthermore, in the above technical scheme, the guide sleeve is further provided with a mounting groove at the periphery, the mounting groove is located below the accommodating groove, a third boss protruding outwards is formed between the mounting groove and the accommodating groove, and a dumbbell sealing ring is arranged in the mounting groove and is in contact with the cylinder body.
Furthermore, in the above technical solution, the inner wall of the upper end of the cylinder body is provided with a first inclined surface, the edge of the end surface of the guide sleeve is provided with a second inclined surface, when the second boss is broken or deformed and extends downward to be accommodated in the accommodating groove, the second inclined surface moves to the side of the first inclined surface, and a pressure relief channel is formed between the second inclined surface and the first inclined surface.
Furthermore, in the above technical scheme, a main seal ring and a tetrafluoro gasket positioned at the upper end of the main seal ring are arranged between the guide sleeve and the piston rod, a guide belt and an inner dust ring are further installed on the inner wall of the guide sleeve, and the piston rod further penetrates through the guide belt and the inner dust ring.
Further, in the above technical scheme, an outer dust ring is arranged between the guide sleeve and the inner wall of the upper end of the cylinder body.
Further, in the above technical scheme, the lower end of the cylinder body is provided with an inflation channel, and an inflation valve is arranged in the inflation channel.
After the technical scheme is adopted, compared with the prior art, the utility model has following beneficial effect: the utility model discloses in the peripheral fashioned second boss of uide bushing and jump ring contact to as the stress point, when the piston rod was overspeed the resilience, the uide bushing was strikeed to the first boss of this piston rod lower extreme, and the stress point is jump ring and second boss position this moment. Because these two parameters of thickness and bearing capacity of second boss design into being less than first boss, when overspeed return stroke many times, when forming impact many times, this second boss can break off at first, so that the second boss gets into and accomodates the groove, the uide bushing can shift up to accomodate the groove and the jump ring contacts the back is static, the uide bushing is not because of the outside departure of the relative cylinder body of second boss fracture, the leading objective that the uide bushing shifted up is with cylinder body formation clearance with the pressure release, in the cylinder body high-pressure nitrogen gas can the safety release income atmosphere this moment, prevent the occurence of failure, reach the purpose of overspeed protection, it is safer to use, the order the utility model discloses extremely strong market competition has.
Drawings
FIG. 1 is a schematic diagram of a prior art nitrogen spring;
FIG. 2 is a schematic view of a prior art nitrogen spring;
fig. 3 is a cross-sectional view of the present invention;
fig. 4 is a sectional view of the guide sleeve of the present invention;
fig. 5 is a schematic diagram of the state of the present invention.
Detailed Description
The present invention will be further described with reference to the following specific embodiments and accompanying drawings.
As shown in fig. 3-5, the nitrogen spring with overspeed protection safety comprises a cylinder body 1, a guide sleeve 3 fixedly mounted on the upper end of the cylinder body 1 through a snap spring 2, and a piston rod 4 mounted on the cylinder body 1 and penetrating through the guide sleeve 3, wherein a first boss 41 for preventing the piston rod 4 from separating from the guide sleeve 3 is formed on the periphery of the lower end of the piston rod 4, a second boss 31 with thickness and bearing capacity smaller than those of the first boss 41 is formed on the periphery of the guide sleeve 3, and the snap spring 2 is arranged on the second boss 31 and serves as a stress point; the periphery of the guide sleeve 3 is further provided with a second boss 31 used for accommodating the broken second boss or accommodating the deformed second boss 31 extending downwards or accommodating a containing groove 32 for accommodating the snap spring 2, and the containing groove 32 is positioned below the second boss 31 and forms a first cavity communicated with the atmosphere with the inner wall of the upper end of the cylinder body 1. The utility model discloses in the peripheral fashioned second boss 31 of uide bushing 3 and 2 contacts of jump ring to as the stress point, when piston rod 4 surpassed the speed of a motor vehicle and kick-backed, the first boss 41 of this piston rod 4 lower extreme impacted uide bushing 3, and the stress point is jump ring 2 and second boss 31 position this moment. Because these two parameters of thickness and bearing capacity of second boss 31 design to be less than first boss 41, when the hypervelocity return stroke many times, when forming impact many times, this second boss 31 can break off at first, so that second boss 31 gets into and accomodates in the groove 32, uide bushing 3 can move up to accomodate groove 32 and jump ring contact back static, uide bushing 3 does not outwards fly out because of second boss 31 fracture relative cylinder body 1, the main objective that uide bushing 3 moved up is with cylinder body 1 formation clearance with the pressure release, high-pressure nitrogen gas can the safety release in the atmosphere in the cylinder body this moment, prevent the occurence of failure, reach the purpose of overspeed protection, it is safer to use, the order the utility model discloses extremely strong market competition has.
The upper end of the second boss 31 is set to be an arc-shaped surface, and the clamp spring 2 is arranged on the arc-shaped surface, so that the assembly stability is ensured.
The periphery of the guide sleeve 3 is further provided with an installation groove 33, the installation groove 33 is positioned below the accommodating groove 32, a third boss 34 protruding outwards is formed between the installation groove 33 and the accommodating groove 32, a dumbbell sealing ring 35 is arranged in the installation groove 33, and the dumbbell sealing ring 35 is in contact with the cylinder body 1. When the second boss 31 is broken to enter the receiving groove 32, the guide sleeve 3 moves up to the receiving groove 32 and is stationary after contacting with the snap spring, that is, the third boss 34 blocks the snap spring to prevent the guide sleeve 3 from flying out relative to the cylinder body.
The inner wall of the upper end of the cylinder body 1 is provided with a first inclined plane 11, the edge of the end face of the guide sleeve 3 is provided with a second inclined plane 301, when the second boss 31 is broken or deformed and extends downwards to be accommodated in the accommodating groove 32, the second inclined plane 301 moves to the side of the first inclined plane 11, and a pressure relief channel is formed between the second inclined plane 301 and the first inclined plane 11, namely the pressure relief channel is used for communicating the inner cavity of the cylinder body with the outside atmosphere, and at the moment, high-pressure nitrogen in the cylinder body can be safely released into the atmosphere to prevent accidents.
Be provided with main sealing washer 42 and be located the tetrafluoro gasket 43 of this main sealing washer 42 upper end between uide bushing 3 and the piston rod 4, guidance tape 36 and interior dust ring 37 are still installed to this uide bushing 3 inner wall, and this piston rod 4 still passes this guidance tape 36 and interior dust ring 37, guarantees piston rod operating stability and smoothness nature. An outer dustproof ring 38 is arranged between the guide sleeve 3 and the inner wall of the upper end of the cylinder body 1, so that the dustproof function is achieved, the working quality can be guaranteed, and the service life is prolonged.
The lower end of the cylinder body 1 is provided with an inflation channel 12, and an inflation valve 13 is arranged in the inflation channel 12.
To sum up, the utility model discloses in the peripheral fashioned second boss 31 of uide bushing 3 and 2 contacts of jump ring to as the stress point, when piston rod 4 surpassed the speed rebound, the first boss 41 of this piston rod 4 lower extreme impacted uide bushing 3, and the stress point is jump ring 2 and second boss 31 position this moment. Because these two parameters of thickness and bearing capacity of second boss 31 design to be less than first boss 41, when the hypervelocity return stroke many times, when forming impact many times, this second boss 31 can break off at first, so that second boss 31 gets into and accomodates in the groove 32, uide bushing 3 can move up to accomodate groove 32 and jump ring contact back static, uide bushing 3 does not outwards fly out because of second boss 31 fracture relative cylinder body 1, the main objective that uide bushing 3 moved up is with cylinder body 1 formation clearance with the pressure release, high-pressure nitrogen gas can the safety release in the atmosphere in the cylinder body this moment, prevent the occurence of failure, reach the purpose of overspeed protection, it is safer to use, the order the utility model discloses extremely strong market competition has.
Of course, the above description is only an exemplary embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes and modifications made by the constructions, features, and principles of the present invention in accordance with the claims of the present invention are intended to be included in the scope of the present invention.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020427139.5U CN212389682U (en) | 2020-03-27 | 2020-03-27 | A gas spring with overspeed protection safety |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020427139.5U CN212389682U (en) | 2020-03-27 | 2020-03-27 | A gas spring with overspeed protection safety |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212389682U true CN212389682U (en) | 2021-01-22 |
Family
ID=74256608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020427139.5U Active CN212389682U (en) | 2020-03-27 | 2020-03-27 | A gas spring with overspeed protection safety |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212389682U (en) |
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2020
- 2020-03-27 CN CN202020427139.5U patent/CN212389682U/en active Active
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