CN108930749B - Overload self-locking device for gas spring - Google Patents
Overload self-locking device for gas spring Download PDFInfo
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- CN108930749B CN108930749B CN201810724418.5A CN201810724418A CN108930749B CN 108930749 B CN108930749 B CN 108930749B CN 201810724418 A CN201810724418 A CN 201810724418A CN 108930749 B CN108930749 B CN 108930749B
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- 238000010438 heat treatment Methods 0.000 claims abstract description 24
- 238000005485 electric heating Methods 0.000 claims abstract description 18
- 238000007789 sealing Methods 0.000 claims description 31
- 238000005096 rolling process Methods 0.000 claims description 23
- 239000007788 liquid Substances 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 13
- 230000008569 process Effects 0.000 claims description 12
- 230000008093 supporting effect Effects 0.000 claims description 8
- 238000007654 immersion Methods 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 6
- 230000035945 sensitivity Effects 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000009413 insulation Methods 0.000 claims description 4
- 230000033001 locomotion Effects 0.000 claims description 4
- 230000001050 lubricating effect Effects 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 230000003139 buffering effect Effects 0.000 claims description 2
- 238000013016 damping Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 claims description 2
- 230000002035 prolonged effect Effects 0.000 claims description 2
- 238000001125 extrusion Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 description 122
- 239000003921 oil Substances 0.000 description 40
- 239000010720 hydraulic oil Substances 0.000 description 5
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000006467 substitution reaction 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
- F16F9/06—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid
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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
- F16F9/06—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid
- F16F9/066—Units characterised by the partition, baffle or like element
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/3207—Constructional features
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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
- F16F9/36—Special sealings, including sealings or guides for piston-rods
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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
- F16F9/56—Means for adjusting the length of, or for locking, the spring or damper, e.g. at the end of the stroke
Abstract
The invention discloses an overload self-locking device for a gas spring, which comprises an air cylinder, wherein one end of the air cylinder is provided with a base, a control box is arranged at one side of the inflator on the base, an SCR electric heating controller and a pressure calculator are arranged in the control box, the SCR electric heating controller is positioned at one side of the pressure calculator, an inner cavity and a mounting groove are arranged in the inflator, the inner cavity is positioned at one side of the mounting groove, and the inner part of the inner cavity is sequentially provided with a self-locking ring, a valve seat, a first piston and a second piston from one end to the other end, the invention is provided with the self-locking ring, a hot-piston ring, a heating ring, wedge rubber and a gas volume sensor, when the initial value of a gas spring is adjusted, a gas volume sensor on the outer wall of one side of the first piston detects the volume of gas contained in the second gas chamber, and a pressure calculator inside the control box calculates the maximum load force that the gas can bear according to the initial volume of the gas.
Description
Technical Field
The invention belongs to the technical field of gas springs, and particularly relates to an overload self-locking device for a gas spring.
Background
The gas spring is a sealed container filled with compressed gas, and the spring action is realized by the compressibility of the gas, and the rigidity of the spring is variable, because when the load acting on the spring is increased, the gas pressure of the quantitative gas in the container is increased, and the rigidity of the spring is increased, and conversely, when the load is reduced, the gas pressure in the spring is reduced, and the rigidity is reduced.
However, the existing gas springs have certain load limits in the use process, the load limits are different according to the difference of the internal gas volume, the gas springs are easy to damage if overloaded for a long time, the service life of the springs is influenced, in addition, the existing gas springs are easy to cause gas leakage in the process of changing the internal compressed gas, the whole sealing performance of the gas springs is influenced, and the pistons are easy to abrade with the inner wall of the gas cylinder in the movement process, and the movement precision of the pistons is influenced.
Disclosure of Invention
The invention aims to provide an overload self-locking device for a gas spring, which aims to solve the problems that the gas spring is easily damaged in the conventional overload use, the sealing performance is insufficient when internal compressed gas is changed, and a piston is easily abraded.
In order to achieve the purpose, the invention provides the following technical scheme: an overload self-locking device for a gas spring comprises an air cylinder, wherein one end of the air cylinder is provided with a base, a control box is arranged at one side of the inflator on the base, an SCR electric heating controller and a pressure calculator are arranged in the control box, the SCR electric heating controller is positioned at one side of the pressure calculator, an inner cavity and a mounting groove are arranged in the inflator, the inner cavity is positioned at one side of the mounting groove, and the inner part of the inner cavity is sequentially provided with a self-locking ring, a second piston, a first piston and a valve seat from one end to the other end, the outer wall of the self-locking ring is provided with a heat insulation ring, and the inner wall of the self-locking ring is provided with a thermal expansion ring, a heating ring is connected between the self-locking ring and the thermal expansion ring, the outer wall of one side, away from the self-locking ring, of the hot piston ring is provided with wedge-shaped rubber, and the outer wall of one side of the first piston is provided with a gas volume sensor.
Preferably, the inner cavity comprises a first air cavity, a hydraulic oil cavity, a second air cavity and a gas distribution cavity, the first air cavity is located between the self-locking ring and the second piston, the hydraulic oil cavity is located between the second piston and the first piston, the second air cavity is located between the first piston and the valve seat, and the gas distribution cavity is located on one side, away from the second air cavity, of the valve seat.
Preferably, a sealing ring is installed on the outer wall of one side of the valve seat, a sealing valve is installed inside the valve seat, a valve rod is welded on the outer wall of one side of the sealing valve, the valve rod penetrates through the sealing ring, an end plate is welded at one end, away from the sealing valve, of the valve rod, the end plate is located inside the mounting groove, a first spring is installed at a position, located on one side of the end plate, inside the mounting groove, and a push rod is welded at one side, away from the first spring.
Preferably, the internally mounted of base has the second spring and divides the gas button, the second spring is located one side of dividing the gas button, the inside position department that is located the second spring both sides of base all installs the magnetic conduction board, first magnetic path and second magnetic path are installed respectively to the both sides of magnetic conduction board, first magnetic path and second magnetic path are connected with push rod and branch gas button respectively.
Preferably, a piston rod is welded on the outer wall of one side of the second piston, an oil guide port is formed in the middle position, away from the outer wall of one side of the piston rod, of the second piston, rolling grooves are formed in the outer walls, adjacent to the oil guide port, of the two sides of the second piston, oil immersion holes are formed in the inner wall of one side of each rolling groove, a mounting frame is mounted inside each rolling groove, balls are rotatably connected to the mounting frame through rotating shafts, the piston rod penetrates through a self-locking ring, an oil filling port is formed in the middle position of the movable end of the piston rod, one side of the oil filling port is connected with an oil inlet pipe, and one end, away from the oil filling port.
Preferably, the positions of the inner cavity and the two sides of the inner cavity in the inflator are provided with gas distribution pipes, the two ends of each gas distribution pipe are respectively connected with the first gas cavity and the gas distribution cavity, the gas volume sensor is electrically connected with the pressure calculator, the pressure calculator and the heating ring are electrically connected with the SCR electric heating controller, and the SCR electric heating controller is electrically connected with the external power supply.
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention is provided with a self-locking ring, a hot piston ring, a heating ring, wedge-shaped rubber and a gas volume sensor, when the initial value of a gas spring is adjusted, the gas volume sensor on the outer wall of one side of a first piston detects the gas volume contained in a second gas cavity, a pressure calculator in a control box calculates and stores the maximum load force which can be borne by the gas according to the initial volume of the gas, when in load, a load object pushes the second piston through a piston rod, the second piston pushes the first piston through a liquid oil cavity, the first piston compresses the second gas cavity, and the gas volume and the pressure in the second gas cavity are changed, at the moment, the pressure value calculated by the pressure calculator is also changed, when the pressure value generated by the load object is larger than the maximum load force, the SCR electric heating controller controls the heating ring in the self-locking ring to be heated, the heating temperature of the heating ring rises, so that the thermal expansion ring is heated and expanded, the expanded thermal expansion ring pushes the wedge-shaped rubber to approach the piston rod, the piston rod is extruded by the wedge-shaped rubber to be in a locking state, the gas spring finishes self-locking operation at the moment, the spring is only in a supporting state and cannot realize the function of the spring, until the load and the gas spring are dismounted, the pressure of the second gas cavity can be changed by pressing the gas distribution button, the heating ring stops heating after the pressure is changed, the thermal expansion ring retracts, so that the piston rod can still move freely, the whole device automatically calculates and induces the load range of the gas spring, the maximum load force of the spring can be automatically changed according to different initial values of the spring, the self-locking device is suitable for different use states of the gas spring, and the use safety of the gas spring is ensured, avoid causing the inside atmospheric pressure of gas spring too high because of overloading and using, the effectual damage probability that has reduced this gas spring improves gas spring's life, locks the piston rod through wedge rubber in addition, and realizes gas spring's auto-lock, effectual reduction mechanical locking structure is to the damage of piston rod outer wall on the one hand, and on the other hand improves the stability when self-lock device locks through wedge rubber's friction.
(2) The invention is provided with an air distribution button, a first magnetic block, a second magnetic block, a magnetic conductive plate, a push rod, an end plate and a valve rod, wherein when the initial value of a spring is adjusted, the air distribution button on a base is pushed, the air distribution button moves towards the inside of the base under the action of the push force and compresses a second spring on one side, meanwhile, the air distribution button drives the second magnetic block to move through a connecting rod in the moving process, the second magnetic block moves on the magnetic conductive plate, the first magnetic block on the other side of the magnetic conductive plate is driven to synchronously move through the transmission of magnetic force, the push rod is driven to move by the first magnetic block in the moving process, the push rod pushes the valve rod to move through the end plate, meanwhile, the first spring in an installation groove is compressed through the end plate, the valve rod drives a sealing valve in a valve seat to move when moving, so that the sealing valve in the valve, Divide air cavity and second air cavity all to be in the on-state, the accessible removes the piston rod and carries out the change of gas spring initial value, when the initial gas of second air cavity reduces, gas spring's initial value reduces, gas spring's bearing capacity also correspondingly reduces simultaneously, otherwise when the initial gas of second air cavity risees, spring initial value also risees, and the adjusting device of whole initial value passes through magnetic force direction and accomplishes, divide the gas button and the inside gas structure of dividing of outside through magnetic path and magnetic conduction board and separate, make outside adjustment structure and inside adjustment structure both keep mutual transmission, realize sealed the partition again, thereby the inside leakproofness of effectual assurance gas spring, avoid causing the spring gas leakage at the in-process of dividing the gas adjustment.
(3) The invention is provided with the hydraulic cavity, the second piston, the rolling groove, the ball and the oil immersion hole, the hydraulic cavity is arranged in the inner cavity of the gas spring, the hydraulic cavity is filled with hydraulic oil, on one hand, the hydraulic cavity plays a role in supporting and damping, on the other hand, the hydraulic cavity plays a role in lubricating the piston, the second piston generates friction with the inner part of the inner cavity when moving in the inner cavity, the balls in the rolling grooves are driven to roll through friction, the outer walls of the balls are respectively in close contact with the inner wall of the inner cavity and the inner wall of the rolling grooves, the balls are always in a sealing state in the rolling process, meanwhile, the liquid oil in the liquid oil cavity can be immersed into the rolling groove through the oil immersion hole on one side of the second piston, lubricate the ball, guarantee the sensitivity of ball, improve the sensitivity of second piston motion on the one hand, on the other hand avoids the ball card to die and increases the damage probability of second piston, improves the life of second piston.
Drawings
FIG. 1 is a front view of the present invention;
FIG. 2 is a side view of the self-locking collar of the present invention;
FIG. 3 is an enlarged view of the invention at A;
FIG. 4 is a schematic structural diagram of a base according to the present invention;
FIG. 5 is an enlarged view of the invention at B;
FIG. 6 is a schematic view of a second piston according to the present invention;
FIG. 7 is a block circuit diagram of the present invention;
in the figure: 1-piston rod, 2-self-locking ring, 3-first air cavity, 4-inner cavity, 5-liquid oil cavity, 6-gas volume sensor, 7-second air cavity, 8-sealing valve, 9-valve rod, 10-control box, 11-SCR electric heating controller, 12-base, 13-pressure calculator, 14-gas distribution cavity, 15-sealing ring, 16-valve seat, 17-first piston, 18-second piston, 19-gas distribution pipe, 20-gas cylinder, 21-heat insulation ring, 22-heat expansion ring, 23-heating ring, 24-wedge rubber, 25-first spring, 26-mounting groove, 27-end plate, 28-push rod, 29-second spring, 30-gas distribution button, 31-first magnetic block, 32-a second magnet, 33-a magnetic conduction plate, 34-an oil inlet pipe, 35-an oil filling port, 36-a rolling groove, 37-a ball, 38-a mounting frame, 39-an oil immersion hole, 40-an oil guide hole and 41-a one-way valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-7, the present invention provides the following technical solutions: an overload self-locking device for a gas spring comprises a gas cylinder 20, wherein a base 12 is installed at one end of the gas cylinder 20, a control box 10 is installed on the base 12 at a position on one side of the gas cylinder 20, an SCR electric heating controller 11 and a pressure calculator 13 are installed inside the control box 10, the SCR electric heating controller 11 is located on one side of the pressure calculator 13, an inner cavity 4 and an installation groove 26 are formed in the gas cylinder 20, the inner cavity 4 is located on one side of the installation groove 26, a self-locking ring 2, a second piston 18, a first piston 17 and a valve seat 16 are sequentially installed inside the inner cavity 4 from one end to the other end, a heat insulation ring 21 is installed on the outer wall of the self-locking ring 2, a heat expansion ring 22 is installed on the inner wall of the self-locking ring 2, a heating ring 23 is connected between the self-locking ring 2 and the heat expansion ring 22, wedge-shaped rubber 24 is installed on the outer wall of one side, far away from, the locking and unlocking operation of the piston rod 1 is realized through the thermal expansion and contraction performance of the thermal expansion ring 22, so that the locking and unlocking of the gas spring are realized, and the gas volume sensor 6 adopts an HA80-N2 nitrogen volume detection sensor.
In the invention, preferably, the inner cavity 4 comprises a first air cavity 3, a hydraulic oil cavity 5, a second air cavity 7 and a gas distribution cavity 14, the first air cavity 3 is positioned between the self-locking ring 2 and the second piston 18, the hydraulic oil cavity 5 is positioned between the second piston 18 and the first piston 17, the second air cavity 7 is positioned between the first piston 17 and the valve seat 16, and the gas distribution cavity 14 is positioned on one side of the valve seat 16 far away from the second air cavity 7, so that the gas distribution operation is realized through the mutual conduction of the first air cavity 3, the second air cavity 7 and the gas distribution cavity 14, and the initial value and the load range of the gas spring are changed.
In the present invention, preferably, a sealing ring 15 is installed on an outer wall of one side of the valve seat 16, the sealing valve 8 is installed inside the valve seat 16, a valve rod 9 is welded on an outer wall of one side of the sealing valve 8, the valve rod 9 penetrates through the sealing ring 15, an end plate 27 is welded at one end, away from the sealing valve 8, of the valve rod 9, the end plate 27 is located inside the mounting groove 26, a first spring 25 is installed at a position, located at one side of the end plate 27, inside the mounting groove 26, a push rod 28 is welded at one side, away from the first spring 25, of the end plate 27, when the valve seat 16 is opened, the first spring 25 is in a compressed state, and retraction of the sealing.
In the present invention, preferably, the base 12 is internally provided with a second spring 29 and an air distribution button 30, the second spring 29 is located at one side of the air distribution button 30, the base 12 is internally provided with magnetic conductive plates 33 at positions located at two sides of the second spring 29, two sides of the magnetic conductive plates 33 are respectively provided with a first magnetic block 31 and a second magnetic block 32, the first magnetic block 31 and the second magnetic block 32 are respectively connected with the push rod 28 and the air distribution button 30, and through conduction of the magnetic conductive plates 33, not only can tight connection between the first magnetic block 31 and the second magnetic block 32 be realized, but also mutual sealing between the first magnetic block 31 and the second magnetic block 32 can be realized.
In the invention, preferably, the piston rod 1 is welded on the outer wall of one side of the second piston 18, the oil guide port 40 is formed in the middle position of the outer wall of the second piston 18 far away from the piston rod 1, the rolling grooves 36 are formed in the outer walls of two sides of the second piston 18 adjacent to the oil guide port 40, the oil immersion hole 39 is formed in the inner wall of one side of each rolling groove 36, the mounting frame 38 is installed inside each rolling groove 36, the ball 37 is rotatably connected to the mounting frame 38 through a rotating shaft, the piston rod 1 penetrates through the self-locking ring 2, the oil injection port 35 is formed in the middle position of the movable end of the piston rod 1, the oil inlet pipe 34 is connected to one side of the oil injection port 35, one end, far away from the oil injection port 35, of the oil inlet pipe 34 is connected with the oil guide port 40 through the check valve 41, and friction between the second piston 18 and.
In the invention, preferably, gas distribution pipes 19 are respectively arranged at positions inside the gas cylinder 20, which are positioned at two sides of the inner cavity 4, two ends of each gas distribution pipe 19 are respectively connected with the first gas cavity 3 and the gas distribution cavity 14, the gas volume sensor 6 is electrically connected with the pressure calculator 13, the pressure calculator 13 and the heating ring 23 are electrically connected with the SCR electric heating controller 11, the SCR electric heating controller 11 is electrically connected with an external power supply, and the first gas cavity 3 and the gas distribution cavity 14 are communicated through the gas distribution pipes 19, so that the gas distribution operation is convenient to realize.
The working principle and the using process of the invention are as follows: when the gas spring is used, firstly, the initial value of the gas spring is adjusted, when the initial value of the spring is adjusted, the gas distribution button 30 on the base 12 is pushed, the gas distribution button 30 moves towards the inside of the base 12 under the action of the pushing force and compresses the second spring 29 on one side, meanwhile, the gas distribution button 30 drives the second magnetic block 32 to move through the connecting rod in the moving process, the second magnetic block 32 moves on the magnetic conductive plate 33, the first magnetic block 31 on the other side of the magnetic conductive plate 33 is driven to synchronously move through the transmission of the magnetic force, the push rod 28 is driven to move by the first magnetic block 31 in the moving process, the push rod 28 drives the valve rod 9 to move through the end plate 27, meanwhile, the first spring 25 in the installation groove 26 is compressed through the end plate 27, the sealing valve 8 in the valve seat 16 is driven to move by the valve rod 9 in the moving process, so that the sealing valve 8 is far away from, so that the first air cavity 3, the gas distribution cavity 14 and the second air cavity 7 are all in a conducting state, at this time, the piston rod 1 is pushed towards the inside of the air cylinder 20, the piston rod 1 pushes the second piston 18 to approach the first piston 17, and pushes the first piston 17 to compress the gas in the second air cavity 7, so that the compressed gas in the second air cavity 7 passes through the valve seat 16 to enter the gas distribution cavity 14, and flows into the gas distribution pipe 19 from the gas distribution cavity 14, the gas is introduced into the inside of the first air cavity 3 through the gas distribution pipe 19, the initial gas in the second air cavity 7 is reduced, the initial value of the gas spring is reduced, the bearing capacity of the gas spring is correspondingly reduced, and meanwhile, when the piston rod 1 is pulled towards the direction far away from the air cylinder 20, the compressed gas reversely enters the inside of the second air cavity 7 from the first air cavity 3, at this time, the initial value of the gas spring is increased, the bearing, the gas volume sensor 6 on the outer wall of one side of the first piston 17 detects the gas volume contained in the second gas cavity 7, the pressure calculator 13 in the control box 10 calculates the maximum load force which can be born by the gas according to the initial volume of the gas and stores the maximum load force, when the initial value adjustment of the gas spring is completed, the gas distribution button 30 is loosened, the spring is integrally installed at a specified position through the base 12, then the load object is installed on the movable end of the piston rod 1, the piston rod 1 is pressed through the weight of the load object, the piston rod 1 pushes the second piston 18, the second gas cavity 7 is compressed through the first piston 17, the second gas cavity 7 is in a sealed state at the moment, the gas generates certain volume compression under the action of pressure, a certain supporting and buffering action is performed on the load object, the vibration on the load object is reduced, the first piston 17 compresses the second gas cavity 7, when the pressure value generated by a load object is larger than the maximum load force, the SCR electric heating controller 11 controls the heating ring 23 in the self-locking ring 2 to heat, the heating ring 23 heats to raise the temperature, the heat expansion ring 22 is heated to expand, the position and the size of the self-locking ring 2 are kept unchanged, the heat expansion ring 22 expands to one side close to the wedge-shaped rubber 24, the wedge-shaped rubber 24 is pushed to approach the piston rod 1, the piston rod 1 is extruded by the wedge-shaped rubber 24 to be in a locking state, the gas spring finishes self-locking operation at the moment, the spring is only in a supporting state and cannot realize the function of the spring, and the pressure of the second air cavity 7 can be changed by pressing the air distribution button 30 until the load and the gas spring are dismounted, after the pressure is changed, the heating ring 23 stops heating, the thermal expansion ring 22 retracts, so that the piston rod 1 can still move freely, in addition, the liquid oil cavity 5 in the inner cavity 4 is filled with liquid oil, on one hand, the supporting and shock absorbing effect is achieved, on the other hand, the piston lubricating effect is achieved, friction is generated between the second piston 18 and the inner cavity 4 when the second piston moves in the inner cavity 4, the balls 37 in the rolling groove 36 are driven to roll through the friction, the outer wall of each ball 37 is respectively in close contact with the inner wall of the inner cavity 4 and the inner wall of the rolling groove 36, the balls 37 are guaranteed to be always in a sealing state in the rolling process, meanwhile, the liquid oil in the liquid oil cavity 5 can also be soaked in the rolling groove 36 through the oil soaking hole 39 on one side of the second piston 18, the balls 37 are lubricated, the sensitivity of the balls 37 is guaranteed, on the one hand, the moving sensitivity of the second piston 18 is, the service life of the second piston 18 is prolonged, the liquid oil in the liquid oil cavity 5 can be filled through the oil filling port 35 at the movable end of the piston rod 1, and the liquid oil flows to the oil guide port 40 through the oil filling port 35, the oil inlet pipe 34 and the check valve 41 and is immersed into the liquid oil cavity 5 through the oil guide port 40.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (1)
1. An overload self-locking device for a gas spring, comprising a gas cylinder (20), characterized in that: a base (12) is installed at one end of the air cylinder (20), a control box (10) is installed at a position, located on one side of the air cylinder (20), on the base (12), an SCR electric heating controller (11) and a pressure calculator (13) are installed inside the control box (10), the SCR electric heating controller (11) is located on one side of the pressure calculator (13), an inner cavity (4) and an installation groove (26) are formed in the air cylinder (20), the inner cavity (4) is located on one side of the installation groove (26), a self-locking ring (2), a second piston (18), a first piston (17) and a valve seat (16) are sequentially installed inside the inner cavity (4) from one end to the other end, a heat insulation ring (21) is installed on the outer wall of the self-locking ring (2), a heat expansion ring (22) is installed on the inner wall of the self-locking ring (2), and a heating ring (23) is connected between the self-locking ring (2) and the heat expansion, the outer wall of one side, far away from the self-locking ring (2), of the hot piston ring (22) is provided with wedge-shaped rubber (24), and the outer wall of one side of the first piston (17) is provided with a gas volume sensor (6);
the inner cavity (4) comprises a first air cavity (3), a liquid oil cavity (5), a second air cavity (7) and a gas distribution cavity (14), the first air cavity (3) is located between the self-locking ring (2) and the second piston (18), the liquid oil cavity (5) is located between the second piston (18) and the first piston (17), the second air cavity (7) is located between the first piston (17) and the valve seat (16), and the gas distribution cavity (14) is located on one side, away from the second air cavity (7), of the valve seat (16);
a sealing ring (15) is mounted on the outer wall of one side of the valve seat (16), a sealing valve (8) is mounted inside the valve seat (16), a valve rod (9) is welded on the outer wall of one side of the sealing valve (8), the valve rod (9) penetrates through the sealing ring (15), an end plate (27) is welded at one end, away from the sealing valve (8), of the valve rod (9), the end plate (27) is located inside a mounting groove (26), a first spring (25) is mounted at a position, located on one side of the end plate (27), inside the mounting groove (26), and a push rod (28) is welded at one side, away from the first spring (25), of the end plate (;
a second spring (29) and an air distribution button (30) are installed inside the base (12), the second spring (29) is located on one side of the air distribution button (30), magnetic conductive plates (33) are installed at positions, located on two sides of the second spring (29), inside the base (12), first magnetic blocks (31) and second magnetic blocks (32) are installed on two sides of each magnetic conductive plate (33), and the first magnetic blocks (31) and the second magnetic blocks (32) are connected with the push rod (28) and the air distribution button (30) respectively;
a piston rod (1) is welded on the outer wall of one side of the second piston (18), an oil guide opening (40) is formed in the middle position of the outer wall of one side, far away from the piston rod (1), of the second piston (18), the outer walls of two sides of the second piston (18) adjacent to the oil guide opening (40) are both provided with rolling grooves (36), the inner wall of one side of each rolling groove (36) is provided with an oil immersion hole (39), and a mounting rack (38) is arranged in the rolling groove (36), a ball (37) is rotatably connected on the mounting rack (38) through a rotating shaft, the piston rod (1) penetrates through the self-locking ring (2), an oil filling port (35) is arranged at the middle position of the movable end of the piston rod (1), one side of the oil filling port (35) is connected with an oil inlet pipe (34), and one end, far away from the oil filling port (35), of the oil inlet pipe (34) is connected with an oil guide port (40) through a one-way valve (41);
gas distribution pipes (19) are respectively arranged at positions, located on two sides of the inner cavity (4), in the gas cylinder (20), two ends of each gas distribution pipe (19) are respectively connected with the first gas cavity (3) and the gas distribution cavity (14), the gas volume sensor (6) is electrically connected with the pressure calculator (13), the pressure calculator (13) and the heating ring (23) are electrically connected with the SCR electric heating controller (11), and the SCR electric heating controller (11) is electrically connected with an external power supply;
when the gas spring is used, firstly, the initial value of the gas spring is adjusted, when the initial value of the spring is adjusted, a gas distribution button (30) on a base (12) is pushed, the gas distribution button (30) moves towards the inside of the base (12) under the action of thrust, a second spring (29) on one side is compressed, meanwhile, the gas distribution button (30) drives a second magnetic block (32) to move through a connecting rod in the moving process, the second magnetic block (32) moves on a magnetic conductive plate (33), a first magnetic block (31) on the other side of the magnetic conductive plate (33) is driven to synchronously move through magnetic force transmission, the first magnetic block (31) drives a push rod (28) to move in the moving process, the push rod (28) pushes a valve rod (9) to move through an end plate (27), meanwhile, the first spring (25) in a sealing valve (26) is compressed through the end plate (27), and the valve rod (9) drives a sealing valve (8) in a valve seat (16) to move when moving, the sealing valve (8) is far away from the valve seat (16), the valve seat (16) and the sealing valve (8) are in a conducting state at the moment, so that the first air cavity (3), the gas distribution cavity (14) and the second air cavity (7) are in a conducting state, the piston rod (1) is pushed into the air cylinder (20), the piston rod (1) pushes the second piston (18) to approach to the first piston (17) and pushes the first piston (17) to compress the gas in the second air cavity (7), so that the compressed gas in the second air cavity (7) passes through the valve seat (16) to enter the gas distribution cavity (14) and flows into the gas distribution pipe (19) from the gas distribution cavity (14), the gas is introduced into the first air cavity (3) through the gas distribution pipe (19), the initial gas in the second air cavity (7) is reduced, the initial value of the gas spring is reduced, and the bearing capacity of the gas spring is correspondingly reduced at the same time, when the piston rod (1) is pulled in the direction away from the air cylinder (20), compressed air reversely enters the second air cavity (7) from the first air cavity (3), the initial value of the air spring is increased, the bearing capacity of the corresponding air spring is also increased, in the process of adjusting the initial value, the air volume sensor (6) on the outer wall of one side of the first piston (17) detects the air volume contained in the second air cavity (7), the pressure calculator (13) in the control box (10) calculates and stores the maximum load force which can be borne by the air according to the initial volume of the air, after the initial value of the air spring is adjusted, the air distribution button (30) is loosened, the spring is integrally installed at a designated position through the base (12), then the load object is installed on the movable end of the piston rod (1), and the piston rod (1) is pressed through the weight of the load object, the piston rod (1) pushes the second piston (18), the second air cavity (7) is compressed through the first piston (17), the second air cavity (7) is in a sealed state at the moment, the air is compressed in a certain volume under the action of pressure, a certain supporting and buffering effect is achieved on a load object, the vibration on the load object is reduced, the volume and the pressure of the air in the second air cavity (7) are changed while the first piston (17) compresses the second air cavity (7), the pressure value calculated by the pressure calculator (13) is changed, when the pressure value generated by the load object is larger than the maximum load force, the heating ring (23) in the self-locking ring (2) is controlled by the SCR electric heating controller (11) to be heated, the heating temperature of the heating ring (23) is increased, the heating expansion ring (22) is heated, and the position and the size of the self-locking ring (2) are kept unchanged, the hot piston ring (22) expands towards one side close to the wedge-shaped rubber (24), the wedge-shaped rubber (24) is pushed to approach the piston rod (1), the piston rod (1) is extruded through the wedge-shaped rubber (24), the piston rod (1) is in a locking state under the extrusion of the wedge-shaped rubber (24), the gas spring at the moment completes self-locking operation, the spring is only in a supporting state and cannot realize the function of the spring, the pressure of the second gas cavity (7) can be changed by pressing the gas-distributing button (30) until the load and the gas spring are dismounted, the heating ring (23) stops heating after the pressure is changed, the hot piston ring (22) retracts, the piston rod (1) can still freely move, in addition, the liquid oil cavity (5) in the inner cavity (4) is filled with liquid oil, on one hand, the supporting and damping effects are achieved, on the other hand, the piston lubricating effect is achieved, and friction is generated between the second piston (18) and the inner cavity (4) when the inner cavity (4) moves, the ball (37) in the rolling groove (36) is driven to roll by friction, the outer wall of the ball (37) is respectively in close contact with the inner wall of the inner cavity (4) and the inner wall of the rolling groove (36), the ball (37) is ensured to be always in a sealed state in the rolling process, meanwhile, the liquid oil in the liquid oil chamber (5) can also be immersed into the rolling groove (36) through an oil immersion hole (39) on one side of the second piston (18) to lubricate the ball (37), the sensitivity of the ball (37) is ensured, on one hand, the motion sensitivity of the second piston (18) is improved, on the other hand, the damage probability of the second piston (18) due to the clamping of the ball (37) is avoided, the service life of the second piston (18) is prolonged, the liquid oil in the liquid oil chamber (5) can be added through an oil filling opening (35) at the movable end of the piston rod (1), and the liquid oil flows to the oil guide opening (40) through the oil filling opening (35), the oil inlet, the oil guide opening (40) is immersed into the oil cavity (5).
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| CN201810724418.5A CN108930749B (en) | 2018-07-04 | 2018-07-04 | Overload self-locking device for gas spring |
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| CN108930749B true CN108930749B (en) | 2020-05-05 |
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| CN111119033B (en) * | 2020-02-11 | 2021-07-30 | 山东卫安震控金属科技有限公司 | Novel anti-seismic damper for bridge safety and implementation method |
| CN111815908B (en) * | 2020-06-30 | 2021-11-19 | 杭州鲁尔物联科技有限公司 | Geological disaster monitoring and early warning device |
| CN111969509B (en) * | 2020-07-10 | 2021-09-28 | 天津龙鼎熙石化新能源科技有限公司 | Air pressure fixed type cable bridge used in building |
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| US3979109A (en) * | 1974-10-14 | 1976-09-07 | Tokico Ltd. | Locking device in gas spring |
| JPS55119242A (en) * | 1979-03-09 | 1980-09-12 | Tokico Ltd | Gas spring with built-in lock |
| JPS56116937A (en) * | 1980-02-20 | 1981-09-14 | Tokico Ltd | Gas spring equipped with locking mechanism |
| JPS56167941A (en) * | 1980-05-28 | 1981-12-23 | Kayaba Ind Co Ltd | Lockup device for gas spring |
| US5435530A (en) * | 1991-04-24 | 1995-07-25 | Stromsholmens Mekaniska Verkstad Ab | Gas spring which after compression has a time delayed return to its original length |
| JPH1182606A (en) * | 1997-09-02 | 1999-03-26 | Unisia Jecs Corp | Hydraulic buffer |
| EP1387109A1 (en) * | 2002-07-30 | 2004-02-04 | Stabilus GmbH | Gas spring |
| DE10329468B3 (en) * | 2003-07-01 | 2004-11-18 | Stabilus Gmbh | Gas spring for chair support column has sliding piston dividing pressure cylinder into 2 working chambers one of which is divided into 2 pressure chambers by sliding separation piston |
| KR20150071333A (en) * | 2013-12-18 | 2015-06-26 | 현대자동차주식회사 | Gas spring with variable surface with bimetal switch |
| KR101571674B1 (en) * | 2014-08-12 | 2015-11-26 | 현대자동차주식회사 | Gas lifter |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3979109A (en) * | 1974-10-14 | 1976-09-07 | Tokico Ltd. | Locking device in gas spring |
| JPS55119242A (en) * | 1979-03-09 | 1980-09-12 | Tokico Ltd | Gas spring with built-in lock |
| JPS56116937A (en) * | 1980-02-20 | 1981-09-14 | Tokico Ltd | Gas spring equipped with locking mechanism |
| JPS56167941A (en) * | 1980-05-28 | 1981-12-23 | Kayaba Ind Co Ltd | Lockup device for gas spring |
| US5435530A (en) * | 1991-04-24 | 1995-07-25 | Stromsholmens Mekaniska Verkstad Ab | Gas spring which after compression has a time delayed return to its original length |
| JPH1182606A (en) * | 1997-09-02 | 1999-03-26 | Unisia Jecs Corp | Hydraulic buffer |
| EP1387109A1 (en) * | 2002-07-30 | 2004-02-04 | Stabilus GmbH | Gas spring |
| DE10329468B3 (en) * | 2003-07-01 | 2004-11-18 | Stabilus Gmbh | Gas spring for chair support column has sliding piston dividing pressure cylinder into 2 working chambers one of which is divided into 2 pressure chambers by sliding separation piston |
| KR20150071333A (en) * | 2013-12-18 | 2015-06-26 | 현대자동차주식회사 | Gas spring with variable surface with bimetal switch |
| KR101571674B1 (en) * | 2014-08-12 | 2015-11-26 | 현대자동차주식회사 | Gas lifter |
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| CN108930749A (en) | 2018-12-04 |
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