CN210318301U

CN210318301U - Gas spring with external driving force

Info

Publication number: CN210318301U
Application number: CN201921126063.6U
Authority: CN
Inventors: 乔彬
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-07-18
Filing date: 2019-07-18
Publication date: 2020-04-14
Anticipated expiration: 2029-07-18

Abstract

An air spring with external driving force is characterized by mainly comprising a cylinder body, a piston rod, a stop valve and a power cylinder or a tank, wherein the piston is arranged in the cylinder body; a cavity for installing an operating rod is arranged in the piston rod, one end of the operating rod is connected with the stop valve, and the other end of the operating rod extends out of the piston rod and is provided with a valve button; a power piston is arranged in the piston rod power cylinder or tank, and divides the interior of the power cylinder or tank into a storage cavity (9) and a medium compressible power cavity; the storage cavity is communicated with a cavity on the piston rod through a pipeline, and a communicating hole communicated with a rod cavity of the cylinder body is formed in one end of the cavity, which is positioned on the cylinder body. The utility model discloses simple structure, it is laborsaving to contract.

Description

Gas spring with external driving force

Technical Field

The utility model relates to an air spring, especially an air spring of taking self-locking switch, specifically speaking are the external air spring of drive power, and the compressed gas of the production elasticity of this air spring is connected with the air spring main part through external mode. Namely an external gas storage (tank) cylinder type gas spring.

Background

The gas spring is developed to the mechanical manufacturing industry from the production and use of various lifting tables and chairs, various opening and closing doors and supports of engine covers by people, is used for the fields of equipment accessory support, instrument shock absorption, tool box cover support, medical industry, body-building equipment and the like, and has wider and wider application range along with further approval of the practicability. In the actual use process, due to the structural characteristics of the traditional gas spring, the ratio of the back pressure resistance F (back pressure) to the ejection power F (ejection) is large (generally 1.2-1.5, particularly more than 2), so that the ejection is easy, the back pressure is laborious, the manual back pressure is adopted, particularly, in the occasion with large load, the force applied in the back pressure is large, the user is very laborious, and even the situation that the user cannot operate alone occurs under the condition that the operator is a woman, an old man or a child, so that the use is inconvenient and humanized; the wide use and convenience of the gas spring need to be brought into play, and the problem of labor waste during back pressure under certain conditions is urgently needed to be solved.

SUMMERY OF THE UTILITY MODEL

The utility model aims at that the high-pressure air chamber to current air spring is whole composite construction with the hydraulic pressure chamber, causes the backpressure to be far more than the elastic lift and influence the problem of using, designs the external air spring of drive power.

One of the technical schemes of the utility model is:

an air spring with external driving force is characterized by mainly comprising a cylinder body 1, a piston 2, a piston rod 3, a stop valve 4 and a power cylinder or tank 5, wherein the piston 2 is arranged in the cylinder body 1, one end of the piston rod 3 is connected with the piston, the other end of the piston rod extends out of the cylinder body 1, and the stop valve 4 used for connecting a rod cavity and a rodless cavity in the cylinder body is arranged at the joint of the piston rod 3 and the piston 2; a cavity for installing an operating rod 6 is arranged in the piston rod 3, one end of the operating rod 6 is connected with the stop valve 4, the other end of the operating rod extends out of the piston rod 3 and is provided with a valve button 7, the valve button 7 is pressed down to drive the operating rod to move downwards, and the operating rod pushes the stop valve to enable a rod cavity and a rodless cavity in the cylinder body to be communicated; a power piston 8 is arranged in the power cylinder or tank 5, and the power piston 8 divides the interior of the power cylinder or tank into a storage cavity 9 and a medium compressible power cavity 10; the storage cavity 9 is communicated with a cavity on the piston rod 3 through a pipeline, and a communication hole 11 communicated with a rod cavity of the cylinder body is formed in one end of the cavity, which is positioned on the cylinder body 1.

The valve button 7 and the operating rod 6 are of an integral structure.

The medium in the power cavity 10 is high-pressure gas or oil-gas mixture.

The medium in the cylinder body 1 and the storage cavity 9 is the same, and the medium is one of oil liquid, water, aqueous solution, various gases or gas-liquid mixture.

The communicating hole 11 is located at the upper part of the stop rod and is still located in the cylinder body when the piston rod 3 is in the longest extending state.

The technical scheme of the utility model is secondly:

an air spring with external driving force is characterized by mainly comprising a cylinder body 1, a piston 2, a piston rod 3, a stop valve 4 and a power cylinder or tank 5, wherein the cylinder body 1 comprises an inner cylinder body 12 and an outer cylinder body 13, the piston 2 is arranged in the inner cylinder body 12, one end of the piston rod 3 is connected with the piston, the other end of the piston rod extends out of the outer cylinder body 13 through the inner cylinder body and the outer cylinder body, a through hole 14 which is communicated with each other is formed between a rod cavity of the inner cylinder body 12 and the outer cylinder body, and the stop valve 4 which is used for communicating a rodless cavity of the inner cylinder body 12 with the outer cylinder body 13 is arranged between the; a valve button 7 for operating the stop valve 4 is arranged on the outer cylinder body 13, and the valve button 7 is pressed to stop the valve action so as to enable the inner cylinder body and the outer cylinder body to be communicated; a power piston 8 is arranged in the power cylinder or tank 5, and the power piston 8 divides the interior of the power cylinder or tank into a storage cavity 9 and a medium compressible power cavity 10; the storage chamber 9 communicates with the outer cylinder 13 via a line.

The utility model has the advantages that:

the utility model discloses broken through the structure of traditional air spring, the cylinder or the gas pitcher that will regard as the compressed gas of power or oil-gas mixture for the first time adopt external mode, can realize return pressure and approximately equal of lifting pressure when the air spring uses, greatly reduced the required effort that resets.

The utility model discloses it is external with the power part of air spring for the first time, be favorable to increasing the volume in power chamber, when the volume of external reservoir or jar is unlimited when fairly big, can make the spring-out power of air spring and return pressure infinitely be close equal, improve the travelling comfort of using.

The utility model discloses a piston rod that can effectively guarantee each air spring when the air spring combination uses moves step lift.

The utility model discloses the simple sound of structure makes convenient to use.

Drawings

Fig. 1 is a schematic view of the structure of a conventional gas spring.

Fig. 2 is one of the schematic structural diagrams of the present invention.

FIG. 3 is a schematic view of the gas spring of FIG. 2 in a back pressure condition.

FIG. 4 is a schematic view of the spring-out condition of the gas spring shown in FIG. 2.

FIG. 5 is a second schematic view of the structure of the present invention (piston rod back pressure state)

FIG. 6 is a schematic view of the gas spring piston rod ejection condition of FIG. 5.

Detailed Description

The invention is further described by the following structural drawings and examples.

The first embodiment.

As shown in fig. 2-4.

An air spring with external driving force mainly comprises a cylinder body 1 (which can be a hydraulic cylinder, an air cylinder and the like), a piston 2, a piston rod 3, a stop valve 4 and a power cylinder or a tank 5, wherein as shown in figure 2, a medium in the cylinder body 1 is one of oil liquid, water, aqueous solution, various gases or gas-liquid mixtures, and can also be completely the same as the existing air spring, the piston 2 is arranged in the cylinder body 1, one end of the piston rod 3 is connected with the piston, the other end of the piston rod extends out of the cylinder body 1, and the stop valve 4 for connecting a rod cavity and a rodless cavity in the cylinder body is arranged at the joint of the piston rod 3 and the piston 2; a cavity for installing an operating rod 6 is arranged in the piston rod 3, one end of the operating rod 6 is connected with the stop valve 4, the other end of the operating rod 6 extends out of the piston rod 3 and is provided with a valve button 7 (the valve button 7 and the operating rod 6 can be of a split structure or an integral structure), the valve button 7 is pressed, the valve button drives the operating rod to move downwards, and the operating rod pushes the stop valve to enable a rod cavity and a rodless cavity in the cylinder body to be communicated; a power piston 8 is arranged in the power cylinder or tank 5, the power piston 8 divides the interior of the power cylinder or tank into a storage cavity 9 and a power cavity 10 with compressible media, and the media in the power cavity 10 are high-pressure gas (such as argon) or oil-gas mixture which is the same as that of the existing gas spring; the storage cavity 9 is communicated with a cavity on the piston rod 3 through a pipeline, and a communication hole 11 communicated with a rod cavity of the cylinder body is formed in one end, located on the cylinder body 1, of the cavity; the communicating hole 11 is located at the upper part of the stop rod and is still located in the cylinder body when the piston rod 3 is in the longest extending state. The gas spring back pressure device of the utility model is shown in figure 3, and the popping state is shown in figure 4. During the return pressure and the ejection, the shut-off valve 4 is to be in an open state, which can be achieved by pressing the flap switch 7.

When the piston rod 3 is at the position shown in figure 3, the valve button 7 is pressed, the stop valve 4 is opened, the oil liquid, the water, the aqueous solution, the gas or the oil-gas mixture in the rod cavity flows to the rodless cavity, at the moment, the high-pressure gas (or the high-pressure oil-gas mixture) in the power cavity 10 in the power cylinder or the tank 5 pushes the power piston 8 to move leftwards, the oil liquid, the water, the aqueous solution, the gas or the oil-gas mixture in the storage cavity 9 is pushed into the rod cavity of the cylinder body 1 through the cavity on the piston rod 3 and flows through the stop valve to enter the rodless cavity, the piston 2 rises, the piston 2 (a piston of the hydraulic cylinder or a piston of the cylinder) pushes the piston rod 3 to overcome the resistance to rise until the resistance on the piston moving to the top end or the piston rod is equal to the maximum thrust of the gas spring, the piston rod stops rising, the valve button 7, the piston rod is locked.

When back pressure is needed, the stop valve is opened again, the piston rod is pressed downwards under the action of external force to drive the piston to move downwards, the flowing medium (such as oil liquid, water, aqueous solution, gas or oil-gas mixture) in the rodless cavity is squeezed into the rod cavity, and along with the increase of the pressure, the flowing medium (such as oil liquid, water, aqueous solution, gas or oil-gas mixture) in the rod cavity flows into the storage cavity 9 of the power cylinder body or tank 5 through the cavity on the piston rod and pushes the power piston 8 to move rightwards to compress the gas or gas-liquid mixture in the power cavity 10, so that high pressure is generated, and as shown in fig. 4, power is provided for the next piston rod to rise.

As shown in fig. 1, the gas spring mainly comprises a cylinder, a valve seat in the cylinder, a piston rod, a valve rod and the like, and high-pressure gas or oil-gas mixture and oil liquid (or water and water solution) are stored in the cylinder. The working principle of the gas spring is that inert gas or oil-gas mixture is filled in a sealed pressure cylinder, the pressure in a cavity is made to be many times higher than the atmospheric pressure, and the pressure difference generated by subtracting the oil contact cross-sectional area of a rodless cavity from the oil contact cross-sectional area of a rodless cavity, namely the cross-sectional area of a piston rod, is utilized to realize the ejection motion of the piston rod. The gas and oil circuit of the lockable gas spring is communicated with the rod cavity and the rodless cavity through the stop valve. When the valve button is pressed, the stop valve is opened, and the piston rod extends out; when the button is released, the valve is closed and the spring will be locked. The piston rod of the gas spring occupies the volume in the cylinder barrel, and loads the external force on the piston rod, when the gas spring works under compression and back pressure, the piston rod is pressed into the cylinder barrel, the piston rod moves axially in the cylinder barrel to extrude oil liquid (or water and aqueous solution), and the oil liquid (or water and aqueous solution) pushes the piston to compress gas to reach a working position; when the external force loaded on the piston rod disappears, the gas recovers and expands, the expanded gas pushes the piston to reset the oil liquid (or water and water solution), the piston rod is moved out, and the gas spring realizes compression back pressure movement and recovery ejection movement.

As shown in fig. 4, the ejection process of the piston rod of the gas spring of the present invention is a process in which the ejection power F (ejection) continuously drops to the lowest point as the piston rod of the gas spring is continuously pushed out and extended to the longest point, and drops linearly; when the piston rod of the piston is continuously contracted to the shortest point, the back pressure resistance F (back pressure) continuously rises to the highest point and is in a process of linearly changing and rising; the pop-up power F (pop-up) and the back pressure resistance F (back pressure) have the same size but opposite vectors when the piston push rod is at the same position; for the same gas spring, the size of the ejecting power F (ejecting) and the back pressure resistance F (back pressure) is determined by the size of the inflation pressure in the gas spring, and simultaneously, when a piston push rod moves up and down, the volume of a medium in a rod cavity is changed, so that the volume of high-pressure gas (or oil-gas mixture) enclosed in the gas spring is changed, and finally, the ejecting power F (ejecting) and the back pressure resistance F (back pressure) are linearly reduced or increased, and the ratio of the maximum value to the minimum value of the force and the ratio of the maximum value to the minimum value of the volume of the high-pressure gas (or high-pressure oil-gas mixture) enclosed in the gas spring are in a linear relationship; in short, under the same conditions, the larger the volume of the high-pressure gas (or high-pressure oil-gas mixture) enclosed in the gas spring is, the smaller the volume change of the high-pressure gas (or high-pressure oil-gas mixture) enclosed in the gas spring when the piston push rod moves up and down, which causes the volume change of the medium in the rod cavity, the smaller the linear changes of the maximum value and the minimum value of the ejecting power F (ejecting) and the back pressure resistance F (back pressure) are, and the smaller the applied force is in the back pressure under the condition of constant load, the easier the user is, especially under the condition of larger load. In practical application, the volume of the high-pressure gas (or high-pressure oil-gas mixture) sealed in the gas spring is enlarged, namely the external diameter of the gas spring is enlarged or the length of the gas spring is lengthened correspondingly, but in some special occasions in reality, the installation position is narrow, the external diameter of the gas spring cannot be enlarged, and the length of the gas spring cannot be lengthened, the maximum value and the minimum value of the traditional gas spring ejecting power F (ejecting) and the back pressure resistance F (back pressure) are changed linearly greatly, and under the condition of constant load, especially under the condition of large load, the applied force is large during the back pressure, a user needs to use labor, and the operation is extremely inconvenient and humanized. At this time, whether a second or even a third installation space exists or not can be considered, and by using the external gas storage (tank) type gas spring of the utility model, a smaller gas spring suitable for the space is installed in the original narrow first installation space, the gas storage (tank) is externally connected in the second or even third installation space, the gas spring is hermetically connected with the external gas storage (tank) cylinder by a pipeline, and the volume of high-pressure gas (or high-pressure oil-gas mixture) which can be sealed by the gas spring is increased, so that the installation problem of the gas spring is solved, the linear change of the maximum value and the minimum value of the spring ejecting power F (ejecting) and the back pressure resistance F (back pressure) of the gas spring is small (theoretically can be infinitely close to one), under the condition of constant load, especially in the occasion of large load, the applied force is very small during the back pressure, the user is very easy, the operation is extremely convenient and humanized, the user experience is excellent.

In a practical situation, the elastic force value F of the gas spring is the value obtained by multiplying the area S of the piston rod by the pressure P of high-pressure gas (or high-pressure oil-gas mixture) enclosed therein. Namely:

popping up until the piston rod is maximally extended:

f (pop out) = S (piston rod) × P (pop out)

When the piston rod is pressed back to the shortest extension:

f (back pressure) = S (piston rod) × P (back pressure)

And under the condition that the temperature is kept unchanged, when the high-pressure gas (or the high-pressure oil-gas mixture) is sealed, the pressure value P of the high-pressure gas (or the high-pressure oil-gas mixture) and the divisor of the volume V of the high-pressure gas (or the high-pressure oil-gas mixture) are constants E. Namely:

p (back pressure)/V (back pressure) = E

P (pop-up)/V (pop-up) = E

Therefore, the magnitude relationship between P (pop-up) and P (back pressure) is:

p (back pressure)/P (pop-up) = V (pop-up)/V (back pressure)

That is to say, when the gas spring extends the longest and the piston rod extends the shortest, the piston rod occupies and releases the volume in the cylinder, and pushes the piston to move, the volume of the high-pressure gas (or high-pressure oil-gas mixture) stored in the cylinder hermetically also changes along with the movement of the piston, when the volume changes violently, the ratio of the magnitude relation between P (pop-up) and P (back pressure) is very large, when the volume changes slightly, the ratio of the magnitude relation between P (pop-up) and P (back pressure) is very slight, and the change is actually the variation relation between the volume V (squeeze-out) of the maximum medium (oil liquid, water and aqueous solution, gas or oil-gas mixture) squeezed out when the piston rod extends the shortest and the volume V (pop-up) of the high-pressure gas (or high-pressure oil-gas mixture) stored in the cylinder hermetically when the piston rod extends the longest:

v (pop-up) = V (back pressure) + V (extrusion)

When the stroke of the gas spring and the diameter of the piston rod are not changed, V (extrusion) is constant

So as long as external gas storage (tank) cylinder volume V is big enough then:

v (back pressure)/V (extrusion) = infinity

V (extruded) is relatively infinitesimal

V (pop-up) ≈ V (back pressure)

Therefore:

p (pop-up) ≈ P (back pressure)

Namely:

f (Pop-up) ≈ F (back pressure)

Therefore, when the installation position is limited, the V (back pressure) is limited and cannot be quite large, so that the difference between the back pressure resistance F (back pressure) and the ejecting power F (ejecting) is large, and the installation is extremely inconvenient and humanized; when using the utility model discloses a during external gas storage (jar) cylinder formula air spring, V (back pressure) can accomplish considerable greatly, and back pressure resistance F (back pressure) and pop out power F (pop out) and compare and be close, and the user is just very light, and it is extremely convenient and humanized to operate, and user experience is splendid.

Example two.

As shown in fig. 5-6.

An air spring with external driving force mainly comprises a cylinder body 1, a piston 2, a piston rod 3 (which can be of a solid structure or a hollow structure or can be directly transformed by adopting the piston rod of the existing air spring), a stop valve 4 and a power cylinder or tank 5, wherein a hydraulic medium in the cylinder body 1 is one of oil liquid, water or aqueous solution. As shown in fig. 5 and 6, the cylinder 1 is composed of an inner cylinder 12 and an outer cylinder 13, the piston 2 is installed in the inner cylinder 12, one end of the piston rod 3 is connected with the piston, the other end extends out of the outer cylinder 13 through the inner cylinder and the outer cylinder, a through hole 14 which is communicated with each other is arranged between the rod cavity of the inner cylinder 12 and the outer cylinder, and a stop valve 4 which is used for communicating the rod-free cavity of the inner cylinder 12 with the outer cylinder 13 is installed between the inner cylinder 12 and the outer cylinder 13; a valve button 7 for operating the stop valve 4 is arranged on the outer cylinder body 13, and the valve button 7 is pressed to stop the valve action so as to enable the rod cavity and the rodless cavity of the inner cylinder body to be communicated; the power cylinder or the tank 5 is internally provided with a power piston 8, the power piston 8 divides the interior of the power cylinder or the tank into a storage cavity 9 and a medium compressible power cavity 10, the medium in the power cavity 10 is high-pressure gas or oil-gas mixture, and the storage cavity 9 is communicated with an outer cylinder body 13 through a pipeline.

As shown in fig. 5, when the valve button 7 is pressed, the stop valve 4 is opened, the medium (including but not limited to oil, water, oil-water solution, gas and gas-liquid mixture, the same shall apply hereinafter) in the outer cylinder 13 enters the inner cylinder 12, the piston 2 is lifted to drive the solid piston rod 3 to lift under the action of the pressure difference, the medium (oil, water, gas or gas-liquid mixture) in the storage chamber 9 of the power cylinder or tank 5 is supplemented into the outer cylinder 13 under the action of the high-pressure gas (or high-pressure oil-gas mixture) and the power piston in the power chamber to continuously provide the power required for lifting until the power and the resistance of the piston rod to the limit position or lifting are equal, in the state of fig. 6, the valve button is released, the medium between the inner cylinder 12 and the outer cylinder 13 cannot flow, the piston is in the locked state, and the. When the piston rod needs to retract, the stop valve 4 is opened, the piston rod 3 drives the piston 2 to move downwards, the medium in the rod cavity is squeezed into the rodless cavity, the medium in the rodless cavity flows into the storage cavity 9 of the power cylinder or tank 5 under the action of continuous pressure and pushes the power piston 8 to move rightwards, and the gas in the power cavity 10 is compressed to restore the high-pressure state, so that energy is stored for the rebound of the piston rod. And finally returns to the state shown in fig. 5.

The utility model discloses the part that does not relate to is the same with prior art or can adopt prior art to realize.

Claims

1. An air spring with external driving force is characterized by mainly comprising a cylinder body (1), a piston (2), a piston rod (3), a stop valve (4) and a power cylinder or tank (5), wherein the piston (2) is arranged in the cylinder body (1), one end of the piston rod (3) is connected with the piston, the other end of the piston rod extends out of the cylinder body (1), and the stop valve (4) used for connecting a rod cavity and a rodless cavity in the cylinder body is arranged at the joint of the piston rod (3) and the piston (2); a cavity for installing an operating rod (6) is arranged in the piston rod (3), one end of the operating rod (6) is connected with the stop valve (4), the other end of the operating rod extends out of the piston rod (3) and is provided with a valve button (7), the valve button (7) is pressed down and drives the operating rod to move downwards, and the operating rod pushes the stop valve to enable a rod cavity and a rodless cavity in the cylinder body to be communicated; a power piston (8) is arranged in the power cylinder or tank (5), and the power piston (8) divides the interior of the power cylinder or tank into a storage cavity (9) and a power cavity (10) with compressible medium; the storage cavity (9) is communicated with a cavity on the piston rod (3) through a pipeline, and one end of the cavity in the cylinder body (1) is provided with a communicating hole (11) communicated with the rod cavity of the cylinder body.

2. An externally connected gas spring with driving force according to claim 1, characterized in that the valve button (7) and the operating rod (6) are of an integral structure.

3. A gas spring with external driving force according to claim 1, characterized in that the medium in the power chamber (10) is high-pressure gas or oil-gas mixture.

4. A gas spring with external driving force according to claim 1, characterized in that the cylinder (1) and the storage chamber (9) have the same medium, and the medium is one of oil liquid, water solution, gas or gas-liquid mixture.

5. A gas spring with external driving force according to claim 1, wherein said communicating hole (11) is located at the upper part of the stop rod and is located in the cylinder body in the longest extended state of the piston rod (3).

6. An air spring with external driving force is characterized by mainly comprising a cylinder body (1), a piston (2), a piston rod (3), a stop valve (4) and a power cylinder or tank (5), wherein the cylinder body (1) consists of an inner cylinder body (12) and an outer cylinder body (13), the piston (2) is arranged in the inner cylinder body (12), one end of the piston rod (3) is connected with the piston, the other end of the piston rod extends out of the outer cylinder body (13) through the inner cylinder body and the outer cylinder body, a through hole (14) which is communicated with each other is formed between a rod cavity of the inner cylinder body (12) and the outer cylinder body, and the stop valve (4) which is used for communicating a rodless cavity of the inner cylinder body (12) with the outer cylinder body (13) is arranged between the inner cylinder body (; a valve button (7) for operating the stop valve (4) is arranged on the outer cylinder body (13), and the valve button (7) is pressed to stop the valve action so as to enable the inner cylinder body and the outer cylinder body to be communicated; a power piston (8) is arranged in the power cylinder or tank (5), and the power piston (8) divides the interior of the power cylinder or tank into a storage cavity (9) and a power cavity (10) with compressible medium; the storage cavity (9) is communicated with the outer cylinder body (13) through a pipeline.

7. A gas spring with external driving force according to claim 6, characterized in that the medium in the power chamber (10) is high-pressure gas or oil-gas mixture.

8. An externally connected gas spring with driving force according to claim 6, characterized in that the cylinder body (1) and the storage chamber (9) have the same medium, and are one of oil liquid, water, aqueous solution, gas or gas-liquid mixture.