CN104514831A - Repairable gas spring capable of being freely inflated and having overload automatic protection function - Google Patents
Repairable gas spring capable of being freely inflated and having overload automatic protection function Download PDFInfo
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- CN104514831A CN104514831A CN201410104009.7A CN201410104009A CN104514831A CN 104514831 A CN104514831 A CN 104514831A CN 201410104009 A CN201410104009 A CN 201410104009A CN 104514831 A CN104514831 A CN 104514831A
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- 238000012423 maintenance Methods 0.000 claims abstract description 3
- 239000003566 sealing material Substances 0.000 claims description 41
- 238000007789 sealing Methods 0.000 claims description 30
- 239000000463 material Substances 0.000 claims description 27
- 238000000034 method Methods 0.000 claims description 21
- 230000006870 function Effects 0.000 claims description 12
- 238000009434 installation Methods 0.000 claims description 12
- 238000005538 encapsulation Methods 0.000 claims description 8
- 108010022579 ATP dependent 26S protease Proteins 0.000 claims description 6
- 239000004020 conductor Substances 0.000 claims description 6
- 230000000994 depressogenic effect Effects 0.000 claims description 5
- 230000019771 cognition Effects 0.000 claims 1
- 238000005336 cracking Methods 0.000 claims 1
- 238000007599 discharging Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 description 170
- 238000005273 aeration Methods 0.000 description 12
- 238000010586 diagram Methods 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 9
- 230000001360 synchronised effect Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000000428 dust Substances 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000003082 abrasive agent Substances 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000003139 buffering 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
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000011089 mechanical engineering Methods 0.000 description 1
- 230000009993 protective function Effects 0.000 description 1
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- 239000013589 supplement Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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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
- F16F9/0227—Telescopic characterised by the piston construction
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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
- F16F9/34—Special valve constructions; Shape or construction of throttling passages
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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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Damping Devices (AREA)
- Safety Valves (AREA)
Abstract
The invention provides a repairable gas spring capable of being freely inflated and having an overload automatic protection function. The repairable gas spring consists of a cylinder body, a cylinder body front end, a cylinder body rear end, a piston module, a positioning part, a positioning tube, a rear cavity safety valve, an inflation one-way valve, a front cavity safety valve and a capillary tube. The cylinder body, the front end and the rear end can be dismounted, and maintenance is facilitated. The inflation one-way valve adjustable in pressure is arranged at the rear end and can achieve inflation and deflation. The inner cavity of the cylinder body is divided into a front cavity and a rear cavity by a piston, the front cavity is connected with the front end, the rear cavity is connected with the rear end, the front cavity and the rear cavity are communicated through the inflation safety valve (one-way valve) adjustable in pressure, and automatic pressure relief can be performed to reach safe set gas pressure. The positioning tube is fixedly connected with a piston rod, the positioning part is in threaded connection with the front end, and a convex groove of the positioning part is intermittently matched with a groove of the positioning tube to prevent the piston rod from rotating. Two rear rings matched with the piston rod, an oil-containing bearing, a front ring and a retainer ring are installed in the front end, gas leakage is prevented, and the piston rod guiding capacity of a bearing is improved.
Description
Technical field
The present invention relates to a kind of that can freely inflate, recoverable gas spring, also in particular to a kind of safe gas spring having automatic overload protection; Nearly step ground, also relates to and prevents piston rod main shaft opposing cylinder from doing the rotation of coaxial inner conductor circumference and prevent the gas spring of moving piston bar dust or mechanical collision; Further, also relate to piston rod opposing cylinder outlet port adopt multi-stage sealed and multistage guiding oil-impregnated bearing, enhancing gas in the jar external leakage ability and piston rod guidance capability add epistasis gas spring; A kind of mechanical engineering aerodynamic component; Further, the gas spring inflation one-way valve of single or multiple gas spring, the external integrated installation of one-way pressure relief valve and using method is also related to.
Background technique
Gas spring is that one can play the functional fittings such as support, buffering, braking, Height Adjustment and angle adjustment, is widely used in the fields such as medical equipment, automobile, furniture, Weaving device, machine-building.Principle is in airtight cylinder barrel, be filled with inert gas or oil gas mixture, makes cylinder interior pressure higher than several times or tens times of atmospheric pressure, utilizes the cross-section area of piston rod to be less than piston cross-section area thus produces pressure difference to realize the motion of piston rod.
Gas spring aerating industry slang is inflation.At present, the mode of inflation is front inflation and rear inflation two kinds, and after being filled with pre-set gas air pressure, the shutoff of press-in steel ball, inflates after being called gas spring; After being filled with pre-set gas air pressure, supplement after dynamometry air pressure deficiency again, be called inflation before gas spring, inflation is inflated by piston rod and the guide sleeve of cylinder barrel intersection and the interval of piston rod.During inflation, need could normally to inflate by special device and frock, substantially can not adjust again after the method inflation.Because of high, particularly initial workpiece and new product the trial-production of reject rate that operation and the technique of inflation cause.Current gas spring has been broken and can not have been repaired.
Several times or tens times of normal atmospheric pressures are stored in gas spring normal temperature lower cylinder body, according to thermodynamic (al) equation of gaseous state P1*VI/T1=P2*V2/T2, in gas spring cylinder, temperature raises, proportional pressure in described gas spring cylinder increases, to blast danger, in routine use gas spring device, just to have described situation to blast.At present, there is the device setting up safety valve bottom gas spring cylinder, described relief valve device has overload pressure protective function to the pressure chamber be communicated with bottom gas spring cylinder, but to described pressure chamber piston the other end cylinder interior pressure chamber No-mistake Principle pressure protecting function, still there is explosion risk in gas spring; Nearly step ground, when gas spring bottom end has the tapped hole or screw rod installing and need, the area that can be used to install other accessory bottom described gas spring is less than described safety valve when installing required area, and described safety valve cannot be installed and can not use.
Gas spring piston cylinder diameter is cylindric or movable piston and described cylinder body surface of contact when being cylindric, described piston does not have the external world to limit its rich described cylinder body shaft axis when circling intervention at the volley, when described piston is dynamic dynamic in cylinder body, described piston opposing cylinder of having an opportunity to be had mercy on circular motion as shaft axis.Usually, piston rod is fixed on piston, described piston rod and the concentricity shaft axis of described piston, and when described piston rotates, described piston rod makes the synchronous rotary of coaxial inner conductor.Closely ground, described piston is done when coaxial centerlines circles around described cylinder body, described piston rod also makes the relative circular movement of coaxial inner conductor relative to cylinder body, when described gas spring job requirement piston rod and cylinder body only make coaxial inner conductor straight line motion and circle be prohibited time, described gas spring device is prohibited from using.
Gas spring piston bar opposing cylinder outlet matching part is the position of gas spring weakness.Described outlet matching part has sealing material, described sealing material does not leak for sealing described cylinder body inner high voltage gas, piston rod is in movement process, described piston rod and the mutual friction of sealing material phase, further, described sealing material and described piston rod interval increase when mutual friction damage, described sealing material and described piston rod interval increase to described gas in the jar when can leak, described cylinder body inner high voltage gas leaks outside release, when gas pressure in described cylinder body unload be depressed into normal pressure time, gas spring operational failure; Described outlet matching part, there is oil-impregnated bearing, described oil-impregnated bearing is used for the guiding of piston rod, described piston rod is in movement process, during because acting on the shaft axis of described piston rod perpendicular external force, the interval that described piston rod coordinates with described oil-impregnated bearing develops to augment direction, described oil-impregnated bearing guidance capability weakens, further, described external force also increases the friction of described piston and described sealing material, further, described external force adds the interval that described sealing material coordinates with described piston rod, accelerates gas spring operational failure.At present, gas spring piston bar opposing cylinder outlet matching part, only has an oil-impregnated bearing, two sealing materials, described outlet matching part is gas spring weak part, the central core of circulation of cylinder inner high voltage gas to external leakage, for the problems referred to above, the present invention increases an oil-impregnated bearing at described outlet position, two sealing materials, a back-up ring, enhance the guide function of oil-impregnated bearing, also enhance described outlet position and seal described cylinder body inner high voltage gas function, also reduce the security incident risk that described outlet position causes because of described cylinder body high pressure gas leakage.
Summary of the invention
The object of the invention is: provide a kind of and can facilitate, freely inflate, recoverable gas spring; A kind of cylinder body inner carrier two ends inner chamber of cylinder block pressure overload automatic pressure-relieving is to the gas spring of safety pressure; A kind of piston rod main shaft opposing cylinder that prevents makes the gas spring that coaxial inner conductor circumference rotates and moving piston bar is dust-proof.
Technological scheme of the present invention is: a kind of gas spring is by the tubular rigid material cylinder body of cylindrical hollow, the rigid material front end of the encapsulation of cylinder body one end and supporting, the rigid material rear end of the encapsulation of the cylinder body the other end and supporting, be fixed with concentric piston rod and the piston assembly that can move in inner chamber of cylinder block, the rigid material locating piece be connected with front end opposite side, the fixing hollow tubular rigid material positioning pipe matched on the piston rod and with locating piece, be arranged on the back cavity safety valve of the nearly cylinder body side on rear end, be arranged on the inflation one-way valve that the rear end inner chamber on rear end is communicated with back cavity safety valve, be arranged on the ante-chamber safety valve having independent endoporus to be connected with rear end on rear end, the capillary tube that connection front end encapsulates the independent endoporus of ante-chamber and the rear end communicated with inner chamber of cylinder block forms.Described ante-chamber safety valve, back cavity safety valve, inflation one-way valve are the one-way valve of pressure adjustable.
Described cylinder body is all threaded with front-end and back-end, and described piston assembly piston is loaded on described inner chamber of cylinder block, and piston rod passes from the center hole of front end, forms the main body of gas spring.The at right angle setting of rear end shaft axis is made in described back cavity safety valve, inflation one-way valve, ante-chamber safety valve and rear end.Further, there is a center hole described rear end, described center hole is connected with described inner chamber of cylinder block and is communicated with described back cavity safety valve and inflates one-way valve, described inflation one-way valve can be used for gas spring inflation, and described back cavity safety valve can release gas spring cylinder and rear end connection chamber be interior transships gas pressure to safety pressure; Have a separate wells to communicate with ante-chamber safety valve in rear end, the ante-chamber that described separate wells is connected with front end with described capillary lumen and described inner chamber of cylinder block communicates, described ante-chamber safety valve can in ante-chamber described in release overload gas pressure to safety pressure.
Described locating piece is connected with described front end, described positioning pipe is connected with described piston rod, described locating piece and described positioning pipe match, described locating piece has three locating points at least in same plane, described positioning pipe just keeps geo-stationary with described locating piece in the plane that described cylinder body shaft axis is vertical, described positioning pipe and described piston rod are connected to a fixed, described in described piston rod, piston is fixedly connected with, no matter described piston assembly motion state why, described piston rod keeps geo-stationary with described cylinder body in the plane that described cylinder body shaft axis is vertical.
The invention has the beneficial effects as follows: provide a kind of gas spring.Described gas spring, in the cavity at piston two ends gas pressure be greater than preset needed for pressure time, all by corresponding safety valve automatically unload be depressed into preset needed for pressure; Described inflation one-way valve can need pressure to inflate in real time with the described inner chamber of cylinder block of adjustment by time changing, this brings great convenience just to production, manufacture and maintenance, also reduce the high defective products that the existing airing form of material brings simultaneously, also bring conveniently to production, manufacturing process, reduce production, manufacture requirement to process equipment, also eliminated existing gas spring and squeeze into the manufacturing that steel ball or draw point bring when manufacturing gas replenishment process shutoff or draw point described in using or steel ball fly the safety hazards that removes; The setting of described locating piece and described positioning pipe; ensure that described gas spring at work; the load that described piston rod drives can keep geo-stationary with described cylinder body in the plane that described cylinder body shaft axis is vertical; and then ground; the load of described gas spring is prevented to do circumference rotary motion relative at the described cylinder body shaft axis with described cylinder body; described positioning pipe has also isolated the passage of described piston rod external environment condition; and then ground, described positioning pipe is protected the Mechanical Contact of described piston rod and is prevented entering of dust.
Accompanying drawing explanation
Figure A is structural representation of the present invention.A1 is A cross section FM-FM3: 1 enlarged view, and A2 is described locating piece schematic diagram, and A3 is described positioning pipe schematic diagram.
Figure B is the schematic cross-section of figure A.Figure B1 is the structure for amplifying schematic diagram of described inflation one-way valve 8, and B2 is the structure for amplifying schematic diagram of described back cavity safety valve 7, and described ante-chamber safety valve structure is the same with described back cavity safety valve structure.B3 is location adjusting element 86 structural representation of the pressure regulating spring 85 in described 7,810 be 86 flat position.B4 is valve body 80 structural representation in described gas charging valve 8.
Figure A1 schematic diagram is A2 and A3 location fit schematic diagram.
Figure C is the replaceable accessory schematic diagram of the present invention 7, is a kind of safety valve.C1 is the structural representation of C70 in described C, and C2 is the structural representation of C77 in described C.
Figure D is another modular construction schematic diagram of A of the present invention, and figure E is the subelement decomposition texture schematic diagram of figure D.
The main difference of described figure D and described figure A is, peace position part 5 and the ante-chamber of cylinder body 1 inner chamber be connected in described figure A in figure A and the capillary tube 10 of the passage of ante-chamber safety valve, described locating piece 5 and capillary tube 10 replace by the E5 locating piece in the identical described figure D of function.
Figure E is the decomposed structural representation of figure D of the present invention.Piston assembly 4 structure in piston assembly E4 in described figure E and described figure A is just the same.
Figure F is the perspective view of the positioning pipe E6 in described figure E.
The gas spring inflation one-way valve of figure G many gas springs, the external integrated installation of one-way pressure relief valve and using method.
Gas spring of the present invention, in figure A and figure B:
1 is by the tubular rigid material cylinder body of cylindrical hollow.
The 2 rigid material front ends being the encapsulation of cylinder body one end and supporting.
The 3 rigid material rear ends being the encapsulation of the cylinder body the other end and supporting.
4 is the piston assemblys being fixed with concentric piston rod and can moving in inner chamber of cylinder block.
5 is the rigid material locating pieces be connected with front end opposite side.
6 is fixing hollow tubular rigid material positioning pipes matched on the piston rod and with locating piece.
The 7 back cavity safety valves being mounted in the nearly cylinder body side on rear end.
8 are mounted in the inflation one-way valve that the rear end inner chamber on rear end is communicated with back cavity safety valve.
9 are mounted in the ante-chamber safety valve having independent endoporus to be connected with rear end on rear end.
10 connect the capillary tube that front end encapsulates the independent endoporus of ante-chamber and the rear end communicated with inner chamber of cylinder block.
11 be 10 moving joint device.
Gas spring of the present invention, in figure A and figure B:
70 to 74 is whole component of described back cavity safety valve 7,70 be 7 valve body, 71 be 7 prelocalization part, 70 are threaded with 71,72 is can at the movable Sealing of 7 inner chamber, and 73 is the Compress Springs in 7,74 be 7 pressure setting part, 73 are arranged between the boss of 72 and 74,74 are threaded with 70, and 74 afterbodys have cross mouth, and 75 is the vents on 70, the i.e. pressure relief vent of 7, C76 is the inlet hole of 71.
Gas spring of the present invention, in figure A and figure B:
80 to 87 is component of described inflation one-way valve 8,80 be 8 gas charging valve main body, 81 be 8 Sealing spool, 82 is the sealing materials on 81 conical surfaces, 83 is the sealing materials suitable for reading on 80,84 is the end opening sealing materials on 80,85 is Compress Springs of the pressure positive definite of 8,86 be 8 pressure setting part, 87 be 8 end seals plug, 88 is the gas charging valve vents in described valve body 80, and 89 is cross recess of described end seals plug 87, described cross recess be used for external tool use connect for subsequent use.
Gas spring of the present invention, in figure A and figure B:
40 to 423 is whole component of described piston assembly 4, 40 be 4 spool, 41 be 4 sealing valve port material, 42 is rings after the piston main body piston of 4, 43 be 4 piston main body, 44 be in 4 43 high-abrasive material, 45 is rings before the piston of in 4 43, 46 is 40 pressure setting Compress Springs in 4, 47 is rings after the tail seal material of in 4 43, 48 be in 4 43 afterbody oil-impregnated bearing, 49 is rings before the tail seal material of in 4 43, 410 be in 4 43 afterbody pad, 411 is 40 pressure setting parts in 4, 412 is the control pieces of valve core 40 in 4, 413 is 412 rear oil-impregnated bearings coordinated in 4, 414 be 4 piston rod, 414 are threaded with 43, 415 is rings after the sealing material of in 4 414, 416 be in 4 414 oil-impregnated bearing, 417 is rings before the sealing material of in 4 414, 418 be in 4 417 back-up ring, 419 is rear locating pieces of described positioning pipe 6, 420 be in 4 412 front oil-impregnated bearing, 421 is prelocalization parts of described positioning pipe 6, 422 be in 4 412 support both compression spring, 423 be in 4 422 locating piece.424 be the two ends of in 4 43 to stream translation hole.
Gas spring of the present invention, in figure C:
C70 to C74 is whole parts of the first step valve, and 75 to C78 is whole parts of the second step valve, and C70 and the C77 of described first order valve body is threaded, and forms a complete described safety valve.In described safety valve:
C70 is the main body of the first step valve, and C71 is the prelocalization part of the first step valve, and C70 and C71 is threaded, and C72 is first order valve seal, and C73 is the Compress Spring of the first step valve pressure adjusting, and C74 is location and the adjustment piece of described C73; C77 is the main body of the second step valve, and C75 is the Sealing of the second step valve, and C76 is the Compress Spring of the second step valve pressure adjusting, and C78 is location and the adjustment piece of described C76; C79 is the front vent of described C71, and C710 is the rear vent of described C71, and C711 is the rear vent of described C77.
Gas spring of the present invention, in figure E:
E1 to E9 is whole design of part schematic diagram of described E,
E1 is by the tubular rigid material cylinder body of cylindrical hollow.
E2 is the rigid material front end of the encapsulation of cylinder body one end and supporting.
E3 is the rigid material rear end of the encapsulation of the cylinder body the other end and supporting.
E4 is the piston assembly being fixed with concentric piston rod and can moving in inner chamber of cylinder block.
E5 is the rigid material locating piece being connected with front end opposite side and being connected with a separate wells of E3.
E6 is the fixing hollow tubular rigid material positioning pipe matched on the piston rod and with locating piece.
E7 is mounted in the back cavity safety valve of the nearly cylinder body side on rear end.
E8 is mounted in the inflation one-way valve that the rear end inner chamber on rear end is communicated with back cavity safety valve.
E9 is mounted in the ante-chamber safety valve having independent endoporus to be connected with rear end on rear end.
E10 is the hole that the front interior cavity of described E1 communicates, and E11 is described E3 independent ventilation hole, and described E11 is communicated with the inlet hole of described E9, E10 and E11 and E5 inner space.And then ground, overload pressure automatic pressure-relieving path in the ante-chamber forming described E1.
Embodiment
The present invention is achieved in that
Gas spring of the present invention, in figure A and figure B, the front end of the connection rear end, rear end 3 of cylinder body 1, the front end of described cylinder body 1 connects the rear end of front end 2 again; The rear stomidium of the hole, front end first of the rear end 3 of described rear end 3 its direction of axis line vertical, hole, front end second, rear end 3, rear end 3, back cavity safety valve is installed in the first hole of the front end of described rear end 3, inflation safety valve is installed in the second hole of the front end of described rear end 3, there is a front end lumen orifice described rear end 3, the front end lumen orifice of described rear end 3 is communicated with the hole, front end first of described rear end 3 and the hole, front end second of described rear end 3, the front end lumen orifice of described rear end 3 is communicated with the rear interior cavity of described cylinder body 1, forms the back cavity of described gas spring
And then ground, the overload pressure in the back cavity of described gas spring, just automatically unloads by described back cavity safety valve 7 safety pressure being depressed into setting.
The other end of described cylinder body 1, the described the other end is the front end of described cylinder body 1, the front end of described cylinder body 1 connects the rear end of described front end 2, there is the endoporus of an all-pass described front end 2, described endoporus communicates with described cylinder body 1 inner chamber, described diameter of bore coordinates with the external diameter interval of the piston rod 414 of described piston assembly 4, the other end of described front end 2 is front ends of described front end 2, there is a large endoporus front end of described front end 2, the large diameter of bore in front end of described front end 2 is greater than the endoporus of the all-pass of described front end 2, after the sealing material of described piston assembly 4, ring 415 is installed on the bottom of the large endoporus in front end of described front end 2, the rear oil-impregnated bearing 416 of described piston assembly 4 is connected with ring 415 after described sealing material, the front ring of sealing material 417 of described piston assembly 4 is connected with described rear oil-impregnated bearing 416, the front ring of described sealing material 417 to have before another sealing material outside ring 417 after being connected with described rear oil-impregnated bearing 416, the front end of described front end 2 is before installing described sealing material after ring 417, the large endoporus in front end of described front end 2 has a rectangular recess outside ring 417 before described sealing material, the back-up ring 418 of described piston assembly 4 is installed in described rectangular recess, described back-up ring 418 is connected with ring 417 before described sealing material, the inner chamber of the rear end of described front end 2 and the front end of described cylinder body 1 and the piston main body of described piston assembly 4, form the ante-chamber of described gas spring.
And then ground, the rear stomidium of described rear end 3, be a separate wells, described ante-chamber safety valve 9 is installed on the rear stomidium of described rear end 3, and the rear stomidium of described rear end 3 also has the rear stomidium vent of the rear end 3 of described rear end 3 its direction of axis line vertical; The rear end of described front end 2 there is the ante-chamber vent be communicated with the ante-chamber of described gas spring of described front end 2 its direction of axis line vertical; Described capillary tube 10 is communicated with the rear stomidium vent of described rear end 3 and the ante-chamber vent of described front end 2.And then ground, the overload pressure in the ante-chamber of described gas spring, just automatically unloads by described ante-chamber safety valve 9 and is depressed into security settings pressure.
Gas spring of the present invention, in figure B2:
When the ante-chamber of described gas spring or the back cavity of described gas spring have overload pressure to pass through, overvoltage stress gas enters the inlet hole 76 in described locating piece 71, and then ground, described overvoltage stress gas pushes described Sealing 72 open, described Compress Spring 73 is promoted by described Sealing 72 and is compressed, and described overvoltage stress gas enters the vent 75 of described valve body 70, and described vent is communicated with atmospheric pressure environment, and then ground, described overload pressure gas is relaxed; When overload pressed gas is relaxed to setting pressure, described pressure spring promotes the air outlet hole that described Sealing 72 blocks 71, and described gas spring pressure keeps setting pressure.
Gas spring of the present invention, in figure B1:
Described inflation one-way valve 8, take out described end seals plug 87, being threaded of described 87 places is taken out with described gas charging valve main body 80, and then ground, can to described gas charging valve main body 80 inner inflatable, aeration gas flow is by the flat position 810 of described pressure setting part 86, and then ground, described aeration gas flow enters the vent 89 of described gas charging valve main body 80, and then ground, described aeration gas flow pushing is to described Sealing spool 81, and then ground, when described aeration gas flow is greater than the internal pressure that described Sealing spool 81 contacts with the back cavity of described gas spring, described aeration gas flow promotes the back cavity internal motion of described Sealing spool 81 to described gas spring, described pressure setting part 86 is threaded with described Sealing spool 81, affiliated pressure setting part 86 is synchronized with the movement with described Sealing spool 81 at described gas charging valve body lumen, and then ground, the Compress Spring 85 of described pressure setting is compressed, the sealing material spool of affiliated inflation one-way valve 8 is opened, described aeration gas flow enters the back cavity of described gas spring, start inflation, and then ground, described aeration gas flow constantly enters the back cavity of described gas spring, when the pressure in described back cavity is greater than the setting pressure of the ante-chamber safety valve 9 of described gas spring or back cavity safety valve 7, enters described working state, and then ground, in described gas spring gas replenishment process, described aeration gas flow constantly enters the back cavity of described gas spring, when the ante-chamber safety valve 9 of described gas spring or back cavity safety valve 7 have pressure relief of gas, stop inflation, disconnect with the screw thread taking out described 87 places in described gas charging valve main body 80, and then ground, the vent 89 of described gas charging valve main body 80 is communicated with ambient atmosphere with the flat position 810 of described pressure setting part 86 and described 80 inner chamber spaces, described Sealing spool 81 is in described 80 chamber pressure releases, the Compress Spring 85 of the pressure setting of described 8 resets, described Sealing spool 81 and described 8 pressure setting part 86 synchronous reset, sealing material suitable for reading 83 in gas charging valve main body 80 described in sealing material 82 conical surface compacting of described Sealing spool 81, end opening sealing material 84 in described Sealing spool 81 compacting 80, the described Sealing spool 81 of described inflation one-way valve 8 is closed, and then ground, the end seals plug 87 of described inflation one-way valve 8 loads gas charging valve main body 80 shutoff of described inflation one-way valve 8.Described gas spring has been inflated.
Gas spring of the present invention, in figure A, figure B:
Described gas spring working principle is in airtight cylinder barrel, be filled with inert gas or oil gas mixture, make cylinder interior pressure higher than several times or tens times of atmospheric pressure, utilize the cross-section area of piston rod to be less than piston cross-section area thus produce pressure difference to realize the motion of piston rod.The implementation procedure of lower piston rod control piece control piston motion is mainly described here, in described gas spring, press control piece 412, the support spring 422 of 412 pressure pressure setting parts 411 and control piece 412, spool 40 and pressure setting part 411 are synchronized with the movement, and depress pressure setting Compress Spring 46, spool 40 is opened, and the back cavity of described gas spring is communicated with the ante-chamber to stream translation hole 424 and described gas spring at two ends with the endoporus of piston main body 43, unclamp control piece 412, the support spring 22 of 412 recovers elastic force, the support spring 422 of 412 promotes control piece 412 and gets back to original state, control piece 412 leaves pressure setting part 411, pressure setting Compress Spring 46 recovers elastic force, pressure setting Compress Spring 46 promotes pressure setting part 411 and spool 40 gets back to original state, spool 40 is pressed on the sealing valve port material 41 of piston main body 43, the endoporus of blocking piston main body 43 be communicated with two ends to the back cavity passage of stream translation hole 424 with described gas spring, the back cavity of described gas spring and the ante-chamber of described gas spring are by piston blocks.By the control to control piece 412, realize the control of piston in the cylinder body 1 inner chamber motion state of described gas spring.
Gas spring of the present invention, in figure A, figure B:
Ring, back-up ring 418 before ring 415, oil-impregnated bearing 416, sealing material after sealing material
Gas spring of the present invention, in figure C:
When the ante-chamber of described gas spring or the back cavity of described gas spring have overload pressure to pass through, overvoltage stress gas enters the front vent C79 of the prelocalization part C71 of described first step valve, and then ground, described overvoltage stress gas pushes described first order valve seal C72 open, the Compress Spring C73 of described first step valve pressure adjusting is promoted by described first order valve seal C72 and is compressed, described overvoltage stress gas enters the front vent C710 of described first order valve body C70, described overvoltage stress gas pushes the Sealing C75 of described second step valve open, the Compress Spring C76 of described second step valve pressure adjusting is promoted by described second level valve seal C75 and is compressed, described overvoltage stress gas enters the rear vent C711 of described second level valve body C77, vent is communicated with atmospheric pressure environment, and then ground, described overload pressure gas is relaxed, when overload pressed gas is relaxed to setting pressure, the Compress Spring C73 of described first step valve pressure adjusting promotes the air outlet hole that described first order valve seal C72 blocks the prelocalization part C71 of described first step valve, the Compress Spring C76 of described second step valve pressure adjusting promotes the air outlet hole that described second level valve seal C75 blocks the prelocalization part C70 of described second step valve, and described gas spring pressure keeps setting pressure.
Gas spring of the present invention, in figure D, figure E, figure F:
Described inflation one-way valve E8 and figure A, scheme inflation one-way valve 8 26S Proteasome Structure and Function in described in B and working procedure is equal to; Described back cavity safety valve E7 with figure A, scheme back cavity safety valve 7 26S Proteasome Structure and Function and working procedure described in B and be equal to; Described ante-chamber safety valve E9 with figure A, scheme ante-chamber safety valve 9 26S Proteasome Structure and Function and working procedure described in B and be equal to; Described piston assembly E4 with figure A, scheme piston assembly 4 26S Proteasome Structure and Function and working procedure described in B and be equal to; Described gas spring locating piece E5 is the same with figure A, locating function scheme gas spring locating piece 5 described in B and orientation type, described gas spring locating piece E5 with scheme A, scheme the described capillary tube 10 of gas spring described in B and be communicated with the ante-chamber of described gas spring and described gas spring is equal to the kinetic energy of front safety valve path; Described positioning pipe E6 is equal to figure A, the 26S Proteasome Structure and Function of scheming positioning pipe 6 described in B and working procedure.
Gas spring of the present invention, in figure D, figure E, figure F:
Described inflation one-way valve E8, take out described end seals plug and be connected with the joint of inflator, start the inflation of described gas spring, aeration gas flow enters the inner chamber of described inflation one-way valve E8, when described chamber pressure is greater than the rear cavity pressure of described gas spring, the spool of described inflation one-way valve E8 is opened, and described aeration gas flow enters the back cavity of described gas spring, and described gas spring starts inflation; And then ground, described aeration gas flow constantly enters the back cavity of described gas spring, when the pressure in described back cavity is greater than the setting pressure of the ante-chamber safety valve E9 of described gas spring or back cavity safety valve E7, enters described working state,
And then ground, in described gas spring gas replenishment process, described aeration gas flow constantly enters the back cavity of described gas spring, when the ante-chamber safety valve E9 of described gas spring or back cavity safety valve E7 has pressure relief of gas, stops inflation, the joint of described inflator
During disconnection, the spool of described inflation one-way valve E8 is closed, and then ground, loads the described end seals plug shutoff of described inflation one-way valve E8, and described gas spring inflation terminates.
Gas spring of the present invention, in figure D, figure E, figure F:
When the ante-chamber of described gas spring has an overload pressure, the hole E10 that described overload pressure is interlinked by the front interior cavity of described cylinder body E1, and then ground, described overload pressure enters the inner chamber of described locating piece E5, and then ground, described overload pressure enters the independent through-hole E11 of described rear end E3, and then ground, described overload pressure enters described ante-chamber safety valve E9, and then ground, described overload pressure pushes the spool of described ante-chamber safety valve E9 open, and then ground, described overload pressure enters ante-chamber safety valve E9 inner chamber, and then ground, described overload pressure is directly discharged to external pressure environment, described overload pressure starts release, when the pressure of described overload pressure release equals the ante-chamber setting pressure of described gas spring, the spool of described ante-chamber safety valve E9 is closed, and described gas spring pressure keeps setting pressure, and the ante-chamber of described gas spring has overload pressure automatic pressure-relieving to terminate.When the back cavity of described gas spring has an overload pressure, described overload pressure directly connects the spool of described back cavity safety valve E7 by the back cavity of described cylinder body E1, and then ground, described overload pressure enters back cavity safety valve E7 inner chamber, and then ground, described overload pressure is directly discharged to external pressure environment, and described overload pressure starts release; When the pressure of described overload pressure release equals the ante-chamber setting pressure of described gas spring, the spool of described back cavity safety valve E7 is closed, and described gas spring pressure keeps setting pressure, and the back cavity of described gas spring has overload pressure automatic pressure-relieving to terminate.
The invention still further relates to gas spring inflation one-way valve, the external installation of one-way pressure relief valve and using method, also relate to the gas spring inflation one-way valve of multiple gas spring, the integrated installation of one-way pressure relief valve and using method.Ga, gb, gc are three independently gas springs, and g8a is the inflation one-way valve of ga, and g8b is the inflation one-way valve of gb, and g8c is the inflation one-way valve of gc; G7a is the back cavity safety valve of ga, and g7b is the back cavity safety valve of gb, and g7c is the back cavity safety valve of gc; G9a is the ante-chamber safety valve of ga, and g9b is the ante-chamber safety valve of gb, and g9c is the ante-chamber safety valve of gc; G8a, g8b, g8c integrated installation is on g8z base, and g7a, g7b, g7c integrated installation is on g7z base, and g9a, g9b, g9c integrated installation is on g9z base.
Claims (10)
1. can freely inflate and have the recoverable gas spring of automatic overload protection, it is characterized in that, described gas spring is by the tubular rigid material cylinder body 1 of cylindrical hollow, the rigid material front end 2 of the encapsulation of cylinder body one end and supporting, the rigid material rear end 3 of the encapsulation of the cylinder body the other end and supporting, be fixed with the piston assembly 4 that concentric piston rod 414 can move in inner chamber of cylinder block, the rigid material locating piece 5 be connected with front end opposite side, be fixed on the hollow tubular rigid material positioning pipe 6 matched on piston rod 414 and with locating piece, be arranged on the back cavity safety valve 7 of the nearly cylinder body side on rear end, be arranged on the inflation one-way valve 8 that the rear end inner chamber on rear end is communicated with back cavity safety valve, be arranged on the ante-chamber safety valve 9 having independent endoporus to be connected with rear end on rear end, connect capillary tube that front end encapsulates the independent endoporus of ante-chamber and the rear end communicated with inner chamber of cylinder block to form 10 and form.The described cylinder body 1 of described gas spring is threaded with described front end 2 or described rear end 3; The rear end 3 of described gas spring is installed the inflation one-way valve 8 of a pressure adjustable; Piston main body 43 outer round surface of the piston assembly 4 of described gas spring coordinates with cylinder body 1 inner chamber circular surfaces, described cylinder body 1 inner chamber is separated into an ante-chamber and a back cavity by described piston main body 43, described ante-chamber is connected with front end 2, described back cavity is connected with rear end 3, described ante-chamber and described back cavity have ante-chamber safety valve 9 respectively, back cavity safety valve 7 is connected, and described ante-chamber safety valve 9 and described back cavity safety valve 7 are pressure adjustable one-way valve; Described gas spring is also provided with locating piece 5 and positioning pipe 6, and positioning pipe 6 is fixedly connected with piston rod 414, and described locating piece 5 cylindrical has tongue, fluted in described positioning pipe 6 inner circle, and described tongue coordinates with described groove interval; There is the front end of a front end 2 front end 2 of described gas spring, the other end of described front end 2 is the rear end being called front end 2, the rear end of described front end 2 is connected with the ante-chamber of cylinder body 1, the front end of described front end 2 is built with ring 417, back-up ring 418 before ring 415, oil-impregnated bearing 416, sealing material after multiple sealing material, and described rear ring 415, oil-impregnated bearing 416, front ring 417, back-up ring 418 match with piston rod 414.
2. according to the requirement of right 1, the described cylinder body 1 of described gas spring is threaded with described front end 2 or described rear end 3, described front end 3 is equal to cylinder head, described rear end 3 is equal to cylinder tail, the screw connection structure of described front end 2 and described cylinder body 1 can dismounting, and described rear end 3 also can dismounting with being threaded of described cylinder body 1.
3. according to the requirement of right 1, the rear end 3 of described gas spring has been installed the inflation one-way valve 8 of a pressure adjustable, described inflation one-way valve 8 is arranged on the rear end 3 of described cylinder body 1, also can be arranged on the front end 2 of described cylinder body 1, described inflation one-way valve 8, both relatively described front end 2 shaft axis or described rear end 3 shaft axis at right angle setting can be made, also relatively described front end 2 shaft axis or described rear end 3 shaft axis can do coaxial inner conductor direction and install, and mounting type is and is threaded, main body 80 1 end face of described valve has the convenient cross concavity otch installed, described inflation one-way valve 8, pull down end seals plug 87, after the main body 80 of external inflation device connection valve is positioned at the screw thread at mounting end sealing plug 87 place, pressurized gas can be poured, described pressurized gas push Sealing spool 81 open, described pressurized gas enter cylinder body 1 inner chamber of described gas spring, enter inflated condition, after the main body 80 that external inflation device removes connection valve is positioned at the screw thread at mounting end sealing plug place, Compress Spring 85 recovers elastic force, Compress Spring 85 promotes pressure setting part 86, pressure setting part 86 is threaded with Sealing spool 81, Sealing spool 81 is retracted retrogressing by pressure setting part 86, Sealing spool 81 conical surface and conical surface seal material 82 press end opening sealing material 84 and the sealing material suitable for reading 83 in main body 80 outlet port of valve, Sealing spool 81 is closed, inflation completes, change pressure spring 85 or the screw thread matching length between adjustment pressure setting part 86 and Sealing spool, closedown or the cracking pressure adjustment of described inflation one-way valve can be completed.
4. according to the requirement of right 1, here overload pressure gas is called by being greater than the pressurized gas presetting pressure, the pressurized gas equaling to preset pressure are called standard pressure gas, described gas spring ante-chamber safety valve 9 is for unloading overload pressure gas in described cylinder body 1 ante-chamber to the standard pressure gas preset, described gas spring back cavity safety valve 7 is for unloading overload pressure gas in described cylinder body 1 back cavity to the standard side of the pressure gas preset, further, as long as have overload pressure gas in the inner chamber of cylinder block of described gas spring, capital is offloaded to by described ante-chamber safety valve 9 or described back cavity safety valve 7 the standard pressure gas preset, further, for unloading the overload pressure gas of described cylinder body 1 ante-chamber of described gas spring, multiple ante-chamber safety valve 9 can be installed, for unloading the overload pressure gas of described cylinder body 1 back cavity of described gas spring, multiple back cavity safety valve 7 can be installed, the mounting point of described ante-chamber safety valve or described back cavity safety valve is in described front end 2 or described rear end 3, described ante-chamber safety valve 9 or described back cavity safety valve 7 have the ante-chamber of described cylinder body 1 or back cavity to be connected way after installing, described ante-chamber safety valve or described back cavity safety valve make at right angle setting relative to the shaft axis of described front end 2 or the shaft axis of described rear end 3 or coaxial line direction is installed, when described ante-chamber safety valve or described back cavity safety valve are done to make at right angle setting when coaxial line direction is installed and cannot be installed because position is limited relative to the shaft axis of described front end 2 or the shaft axis of described rear end 3.
5. according to the requirement of right 4, described ante-chamber safety valve 9 is the same with the 26S Proteasome Structure and Function of described back cavity safety valve 7, all the one-way valve of pressure adjustable, can by adjustment pressure setting part 74 or change that Compress Spring 73 adjusts described one-way valve preset required Set pressure.
6. according to the requirement of right 1, described gas spring is provided with locating piece 5 and positioning pipe 6, and described locating piece 5 cylindrical has tongue, and described tongue has three at least in the plane perpendicular with described locating piece 5 shaft axis; Fluted in described positioning pipe 6 inner circle, described groove has three at least in the plane perpendicular with described positioning pipe 6 shaft axis, and described tongue coordinates with described groove interval.
7. according to the requirement of right 1, ring 417, back-up ring 418 before ring 415, oil-impregnated bearing 416, sealing material after described multiple sealing material, described rear ring 415, oil-impregnated bearing 416, front ring 417, back-up ring 418 and piston rod 414 match, described multiple with two for common situation.
8. according to the requirement of right 1, the piston assembly of described gas spring can be the controllable piston assembly with spool 40 and control piece 412, spool 40 has a Returnning spring 46,46 are installed on piston main body 43 has a mind between inner bore of step and pressure setting part 411, spool 40 has a screw rod end, pressure setting part 411 has an end face screwed hole of centre, and described screw rod end is connected with described tapped hole, and Returnning spring 46 is for the reset of spool 40; Spool controlling rod 412 has a Returnning spring 422,422 to be installed between 412 end guide bearing 420 and 422 locating pieces 423, and locating piece 423 is threaded with controlling rod 412, and Returnning spring 422 automatically resets after discharging external force for controlling rod 412.
9. according to the requirement of right 1, described gas spring is the inflation one-way valve 8 with pressure adjustable, can inflate to inner chamber of cylinder block by 8, when inflation pressure is greater than ante-chamber safety valve 9 or back cavity safety valve 7, cylinder body 1 inner chamber overload pressure can unload by ante-chamber safety valve 9 or back cavity safety valve 7 safety pressure being depressed into and presetting, described ante-chamber or described back cavity have overload pressurized gas ejection sounding, and now stop inflation, described gas spring has been inflated, when raising because of cavity temperature in cylinder body 1 or other reason temperature, according to equation of gaseous state P1V1/T1=P2V2/T2, described temperature raises and causes described cylinder body 1 inner chamber inner high voltage gas pressure ratio to increase, further, overload pressurized gas are produced in cylinder body 1 inner chamber, now, described overload high pressure air cognition is offloaded to by ante-chamber safety valve 9 or back cavity safety valve 7 the safe gas pressure preset in described cylinder body 1 inner chamber, cylinder body 1 and front end 2 and rear end 3 is dismantled and assembled is threaded, when described gas spring has unit exception to need repairing, the pressure setting part 74 that first can adjust ante-chamber safety valve 9 or back cavity safety valve discharges described cylinder body 1 inner chamber pressurized gas, but preferential end of removing walks sealing plug 87, then top pressure inflation one-way valve pressure setting part 86, spool 81 is opened, and discharges described cylinder body 1 inner chamber pressurized gas, described pressurized gas release is complete, can carry out the maintenance work of described gas spring, locating piece 5 is threaded with front end 2 or another Connecting format E5 and E1 of locating piece fixes or is located by connecting, described locating piece 5 keeps geo-stationary with described cylinder body 1, after positioning pipe 6 and piston rod 414 have lock nut, locating piece 419 or prelocalization part 421 are located by connecting, described positioning pipe 6 keeps geo-stationary with described piston rod 414, the tongue of described locating piece 5 coordinates with the groove interval of described positioning pipe 6, described locating piece 5 only does the relative movement of cylinder body 1 direction of axis line with described positioning pipe 6, described locating piece 5 and described positioning pipe 6 at cylinder body 1 shaft axis around circular direction geo-stationary, further, piston rod 414 only does cylinder body 1 direction of axis line relative movement relative to cylinder body 1 and at cylinder body 1 shaft axis around circular direction geo-stationary, the front end inner chamber of described front end 2 is equiped with ring 415 after sealing material, oil-impregnated bearing 416, ring 417 before sealing material, back-up ring 418, described when circle 418 the other end be installed in addition with establish sealing material after ring 415, oil-impregnated bearing 416, ring 417 before sealing material, back-up ring 418, when needing, can be installed in addition with and establish ring 415 after multiple sealing material, oil-impregnated bearing 416, ring 417 before sealing material, back-up ring 418, described rear ring 415, oil-impregnated bearing 416, front ring 417, back-up ring 418 and piston rod 414 match, after multiple closure material, before ring 415 or sealing material, ring 417 strengthens the sealing to cylinder body 1 inner chamber pressurized gas, oil-impregnated bearing 416 adds the guide function of piston rod 414.
10. the invention still further relates to gas spring inflation one-way valve, the external installation of one-way pressure relief valve and using method, also relate to the gas spring inflation one-way valve of multiple gas spring, the integrated installation of one-way pressure relief valve and using method.Ga, gb, gc are three independently gas springs, and g8a is the inflation one-way valve of ga, and g8b is the inflation one-way valve of gb, and g8c is the inflation one-way valve of gc; G7a is the back cavity safety valve of ga, and g7b is the back cavity safety valve of gb, and g7c is the back cavity safety valve of gc; G9a is the ante-chamber safety valve of ga, and g9b is the ante-chamber safety valve of gb, and g9c is the ante-chamber safety valve of gc; G8a, g8b, g8c integrated installation is on g8z base, and g7a, g7b, g7c integrated installation is on g7z base, and g9a, g9b, g9c integrated installation is on g9z base.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410104009.7A CN104514831B (en) | 2014-03-20 | 2014-03-20 | Repairable gas spring capable of being freely inflated and having overload automatic protection function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410104009.7A CN104514831B (en) | 2014-03-20 | 2014-03-20 | Repairable gas spring capable of being freely inflated and having overload automatic protection function |
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| Publication Number | Publication Date |
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| CN104514831A true CN104514831A (en) | 2015-04-15 |
| CN104514831B CN104514831B (en) | 2017-05-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114102638A (en) * | 2022-01-25 | 2022-03-01 | 成都理工大学 | Intelligent inspection robot for library |
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| CN1681421A (en) * | 2002-09-10 | 2005-10-12 | 郑义协 | Length adjustable gas spring |
| US20080179795A1 (en) * | 2002-06-25 | 2008-07-31 | Fox Factory, Inc. | Integrated and self-contained suspension assembly having an on-the-fly adjustable air spring |
| CN202176653U (en) * | 2011-08-15 | 2012-03-28 | 王旭 | Air pressure damper |
| EP2535251A2 (en) * | 2010-07-09 | 2012-12-19 | Specialized Bicycle Components, Inc. | Bicycle with suspension |
| CN203856937U (en) * | 2014-03-20 | 2014-10-01 | 罗成 | Freely-inflatable and automatic-overload-protection repairable gas spring |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080179795A1 (en) * | 2002-06-25 | 2008-07-31 | Fox Factory, Inc. | Integrated and self-contained suspension assembly having an on-the-fly adjustable air spring |
| CN1681421A (en) * | 2002-09-10 | 2005-10-12 | 郑义协 | Length adjustable gas spring |
| EP2535251A2 (en) * | 2010-07-09 | 2012-12-19 | Specialized Bicycle Components, Inc. | Bicycle with suspension |
| CN202176653U (en) * | 2011-08-15 | 2012-03-28 | 王旭 | Air pressure damper |
| CN203856937U (en) * | 2014-03-20 | 2014-10-01 | 罗成 | Freely-inflatable and automatic-overload-protection repairable gas spring |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114102638A (en) * | 2022-01-25 | 2022-03-01 | 成都理工大学 | Intelligent inspection robot for library |
| CN114102638B (en) * | 2022-01-25 | 2022-04-08 | 成都理工大学 | Intelligent inspection robot for library |
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| CN104514831B (en) | 2017-05-10 |
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