CN217271615U - Automatic unloading device and hydro-pneumatic spring - Google Patents

Abstract

The application discloses automatic unloading device and hydro-pneumatic spring. This application is applicable to the automotive technology field, and automatic unloading device's wherein blanking cover is sealed to be set up in oil gas spring's piston, and the check valve is sealed to be set up in the blanking cover, and the oil-out of check valve and oil gas spring's rodless chamber intercommunication, the oil inlet of check valve and oil gas spring have the pole chamber intercommunication, and the upper end of drainage tube is connected with the oil inlet of check valve, and the lower extreme setting of drainage tube is in the bottom that has the pole chamber. The application can realize the automatic unloading of hydro-pneumatic spring, has the characteristics of high integration level and simple structure, and has good practicability and novelty.

Description

Automatic unloading device and hydro-pneumatic spring

Technical Field

The application belongs to the technical field of automobiles, and particularly relates to an automatic unloading device and a hydro-pneumatic spring.

Background

Along with the development of the automobile industry, the application of oil gas suspension on heavy and ultra-heavy off-road vehicles is increasingly wide, the good telescopic performance of an oil gas spring is the premise of realizing the buffering and vibration damping performance of a double-air-chamber oil gas suspension, the working pressure of the oil gas spring needs to be limited to meet the engineering practice, and the total volume of oil liquid in the oil gas spring is controllable.

At present, the oil-gas spring is unloaded in two ways, one way is to adjust the volume of a working cavity with abnormal oil-gas spring pressure in a way of removing an oil port and maintain the gas state of the working cavity again, although the operation way is more direct, the subsequent maintenance flow is more complicated, the unloading way has the characteristic of hysteresis, and the effect is more limited; the other is that the medium is discharged back to the oil tank when the pressure reaches the upper limit value by arranging a pressure valve (a one-way valve or an overflow valve) at the working oil port, the operation mode does not need manual operation, but the operation mode has the defects of complex structure, difficult installation and great influence on gas characteristics, and the defect that the pressure can not be maintained exists under special working conditions.

In the prior art, an automatic unloading device which has high integration level and simple structure, can effectively avoid gas loss and can still be normally used under special working conditions is lacked.

SUMMERY OF THE UTILITY MODEL

The automatic unloading device aims at solving the technical problem that the existing hydro-pneumatic spring is short of an automatic unloading device with high integration level and simple structure to a certain extent. Therefore, the application provides an automatic unloading device and a hydro-pneumatic spring.

The technical scheme of the application is as follows:

in one aspect, the present application provides an automatic unloading device, comprising:

the plug cover is hermetically arranged in the piston of the hydro-pneumatic spring;

the check valve is hermetically arranged in the plug cover, an oil outlet of the check valve is communicated with a rodless cavity of the hydro-pneumatic spring, and an oil inlet of the check valve is communicated with a rod cavity of the hydro-pneumatic spring;

the upper port of the drainage tube is connected with the oil inlet of the one-way valve, and the lower port of the drainage tube is arranged at the bottom of the rod cavity.

Further, the automatic unloading device comprises a plurality of sealing rings, and the sealing rings are arranged between the outer peripheral surface of the blocking cover and the inner peripheral surface of the piston.

Furthermore, the outer peripheral surface of the blocking cover is provided with a plurality of ring grooves, and each ring groove is internally and correspondingly provided with the sealing ring.

Furthermore, the plug cover is provided with an oil inlet channel, the inlet of the oil inlet channel is connected with the upper port of the drainage tube, and the outlet of the oil inlet channel is connected with the oil inlet of the one-way valve.

Further, the blanking cover is provided with an oil outlet channel, an inlet of the oil outlet channel is connected with an oil outlet of the one-way valve, and an outlet of the oil outlet channel is connected with the rodless cavity

On the other hand, this application still provides a hydro-pneumatic spring, hydro-pneumatic spring includes piston and foretell automatic unloading device, the piston sets up hydro-pneumatic spring's inside, the blanking cover is sealed to be set up in the piston, the check valve is sealed to be set up in the blanking cover, the oil-out of check valve with hydro-pneumatic spring's no pole chamber intercommunication, the oil inlet of check valve with hydro-pneumatic spring has pole chamber intercommunication, the last port of drainage tube with the oil inlet of check valve is connected, the lower port of drainage tube sets up there is the bottom in pole chamber.

Further, the hydro-pneumatic spring further comprises a pressing block, the pressing block is arranged at the upper end inside the piston, the blocking cover is arranged at the lower end inside the piston, and the bottom of the pressing block is connected with the top of the blocking cover.

Further, the hydro-pneumatic spring still includes:

the opening of the cylinder barrel is arranged downwards, and the piston is arranged at the upper end inside the cylinder barrel;

the piston rod is arranged at the lower end in the cylinder barrel, and the bottom of the piston is connected with the top of the piston rod;

the guide sleeve is arranged between the inner peripheral surface of the lower end of the cylinder barrel and the outer peripheral surface of the lower end of the piston rod;

a spring seat disposed at a lower end of the piston rod.

Furthermore, the piston rod is hollow and communicated with the rod cavity, and an oil port at the upper end of the spring seat is communicated with the inside of the piston rod.

Further, the lower port of the drainage tube is arranged in an oil groove at the upper end of the spring seat.

The embodiment of the application has at least the following beneficial effects:

the application provides a hydro-pneumatic spring, wherein an automatic unloading device is arranged, when the hydro-pneumatic spring is normally used, the piston extrudes the rodless cavity upwards, the pressure in the rodless cavity is increased, the automatic unloading device is in a non-working state at the moment, the gas in the rod cavity is positioned at the upper end of the rod cavity, the oil in the rod cavity is positioned at the lower end of the rod cavity, the pressure in the rodless cavity is continuously increased, under the action of pressure difference, the oil liquid in the rodless cavity can slowly enter the rod cavity to increase the pressure in the rod cavity, when the pressure in the rod cavity is increased to the opening pressure of the check valve, the check valve is opened, so that oil in the rod cavity enters the rodless cavity through the lower end of the drainage tube, the oil inlet of the check valve and the oil outlet of the check valve, and the pressure in the rod cavity is reduced along with the discharge of the oil in the rod cavity, so that the oil-gas spring is unloaded.

The application provides a hydro-pneumatic spring, owing to install automatic off-load device and can realize hydro-pneumatic spring's automatic off-load, have high integrated level and simple structure's characteristics concurrently, have fine practicality and novelty.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an automatic unloading device according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a hydro-pneumatic spring according to an embodiment of the present application.

Reference numerals:

1-a cylinder barrel; 2-a compaction block; 3-a piston; 4-a piston rod; 5-a filling tube; 6, a guide sleeve; 7-a spring seat; 8-a filling port; 9-automatic unloading device; 901-plugging cover; 902-sealing ring; 903-one-way valve; 904-oil outlet; 905-an oil inlet channel; 906-drainage tube.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, 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 application.

Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize the application of other processes and/or the use of other materials.

The application is described below with reference to specific embodiments in conjunction with the following drawings:

fig. 1 is a drawing illustrating an automatic unloading device according to an embodiment of the present application, and with reference to fig. 1, the automatic unloading device includes a blocking cover 901, a one-way valve 903, and a drainage tube 906.

In the embodiment of the application, a blocking cover 901 is arranged in a piston 3 of an oil-gas spring in a sealing mode, a one-way valve 903 is arranged in the blocking cover 901 in a sealing mode, an oil outlet of the one-way valve 903 is communicated with a rodless cavity of the oil-gas spring, an oil inlet of the one-way valve 903 is communicated with a rod cavity of the oil-gas spring, an upper port of a drainage tube 906 is connected with an oil inlet of the one-way valve 903, and a lower port of the drainage tube 906 is arranged at the bottom of the rod cavity.

Specifically, with reference to fig. 1, when the hydro-pneumatic spring is in normal use, the piston 3 extrudes the rodless cavity upwards, the pressure inside the rodless cavity increases, at this time, the automatic unloading device is in a non-working state, the gas inside the rod cavity is located at the upper end of the rod cavity, the oil inside the rod cavity is located at the lower end of the rod cavity, the pressure inside the rodless cavity continues to increase along with the pressure inside the rodless cavity, under the action of pressure difference, the oil inside the rodless cavity slowly enters the rod cavity, the pressure inside the rod cavity increases, when the pressure inside the rod cavity increases to the opening pressure of the check valve 903, the check valve 903 opens, the oil inside the rod cavity passes through the lower end of the drainage tube 906, the oil inlet of the check valve 903, the oil outlet to the valve, enters the rodless cavity, and the pressure inside the rod cavity decreases along with the discharge of the oil inside the rod cavity, so as to achieve unloading of the hydro-pneumatic spring.

In the embodiment of the present application, since the upper port of the drainage tube 906 is connected to the oil inlet of the check valve 903, the lower port of the drainage tube 906 is disposed at the bottom of the rod cavity, i.e., the lower port of the drainage tube 906 is in the oil, thereby ensuring that the gas in the rod cavity cannot enter the rodless cavity due to leakage.

Further, referring to fig. 1, the automatic unloading apparatus includes a plurality of seal rings 902, and the seal rings 902 are provided between the outer circumferential surface of the cap 901 and the inner circumferential surface of the piston 3 to improve the sealing performance of the cap 901 in the piston 3.

Further, the outer peripheral surface of the blocking cover 901 is provided with a plurality of ring grooves, and a sealing ring 902 is correspondingly arranged in each ring groove to fix the sealing ring 902, thereby ensuring the use effect of the sealing ring 902.

Further, the blanking cover 901 is provided with an oil inlet channel 905 and an oil outlet channel 904, an inlet of the oil inlet channel 905 is connected with an upper port of the drainage tube 906, an outlet of the oil inlet channel 905 is connected with an oil inlet of the one-way valve 903, an inlet of the oil outlet channel 904 is connected with an oil outlet of the one-way valve 903, and an outlet of the oil outlet channel 904 is connected with the rodless cavity, so that the automatic unloading device can smoothly feed and discharge oil.

Further, fig. 2 is a hydro-pneumatic spring according to an embodiment of the present application, and with reference to fig. 2, the hydro-pneumatic spring includes a cylinder barrel 1, a piston rod 4, a piston 3, a guide sleeve 6, and a spring seat 7.

The opening of the cylinder barrel 1 in the embodiment of the application is arranged downwards, the piston 3 is arranged at the upper end inside the cylinder barrel 1, the piston rod 4 is arranged at the lower end inside the cylinder barrel 1, the bottom of the piston 3 is connected with the top of the piston rod 4, the guide sleeve 6 is arranged between the inner circumferential surface of the lower end of the cylinder barrel 1 and the outer circumferential surface of the lower end of the piston rod 4, the spring seat 7 is arranged at the lower end of the piston rod 4, the automatic unloading device 9 is arranged in the hydro-pneumatic spring, the blocking cover 901 is arranged in the piston 3 in a sealing mode, the one-way valve 903 is arranged in the blocking cover 901 in a sealing mode, the oil outlet of the one-way valve 903 is communicated with the rodless cavity of the hydro-pneumatic spring, the oil inlet of the one-way valve 903 is communicated with the rod cavity of the hydro-pneumatic spring, the upper port of the drainage tube 906 is connected with the oil inlet of the one-way valve 903, and the lower port of the drainage tube 906 is arranged at the bottom of the rod cavity, so as to realize the automatic unloading of the hydro-pneumatic spring.

Further, with reference to fig. 2, the hydro-pneumatic spring further includes a compressing block 2, the compressing block 2 is disposed at the upper end inside the piston 3, the cap 901 is disposed at the lower end inside the piston 3, and the bottom of the compressing block 2 is connected to the top of the cap 901 to fix the cap 901 and ensure the installation stability of the automatic unloading device 9.

Referring to fig. 2, the piston rod 4 is hollow and is communicated with the rod cavity, and an oil port at the upper end of the spring seat 7 is communicated with the inside of the piston rod 4, so that the stability of the rod cavity of the hydro-pneumatic spring is ensured.

Referring to fig. 2, the lower port of the draft tube 906 is disposed in the oil groove at the upper end of the spring seat 7 to ensure that the lower port of the draft tube 906 is disposed at the bottom of the rod chamber and is always in the oil.

In the embodiment of the application, the upper end of the piston rod 4 is provided with a through hole to realize the communication with the rod cavity.

Further, combine fig. 2, this oil-gas spring still includes filling tube 5 and filling opening 8, the bottom surface at blanking cover 901 is connected to the upper end of filling tube 5, the lower extreme and the spring holder 7 of filling tube 5 are connected, and with the filling opening 8 intercommunication of setting in spring holder 7, filling opening 8 intercommunication has the outside of pole chamber and this oil-gas spring, the through-hole has been seted up to the upper end of filling tube 5, in order to realize filling tube 5 and the intercommunication that has the pole chamber, fill gas and fluid to having the pole chamber through filling opening 8, after filling oil gas, must seal filling opening 8.

The application provides a hydro-pneumatic spring, owing to install automatic off-load device and can realize hydro-pneumatic spring's automatic off-load, have high integrated level and simple structure's characteristics concurrently, have fine practicality and novelty.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise" indicate orientations or positional relationships based on the orientation or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present application and for simplicity in description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be considered as limiting the present application.

It should be noted that all the directional indications in the embodiments of the present application are only used to explain the relative position relationship, the motion situation, and the like between the components in a certain posture, and if the certain posture is changed, the directional indication is changed accordingly.

In this application, unless expressly stated or limited otherwise, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

Furthermore, descriptions in this application as to "first," "second," etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.

In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: numerous changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. An automatic unloading device, characterized in that the automatic unloading device (9) comprises:

the plug cover (901) is arranged in the piston (3) of the hydro-pneumatic spring in a sealing mode;

the check valve (903) is hermetically arranged in the blocking cover (901), an oil outlet of the check valve (903) is communicated with a rodless cavity of the hydro-pneumatic spring, and an oil inlet of the check valve (903) is communicated with a rod cavity of the hydro-pneumatic spring;

the upper port of the drainage tube (906) is connected with the oil inlet of the one-way valve (903), and the lower port of the drainage tube (906) is arranged at the bottom of the rod cavity.

2. The automatic unloader according to claim 1, wherein the automatic unloader (9) includes a plurality of seal rings (902), and the seal rings (902) are provided between an outer circumferential surface of the cap (901) and an inner circumferential surface of the piston (3).

3. The automatic unloading device according to claim 2, wherein a plurality of ring grooves are formed in the outer peripheral surface of the blocking cover (901), and a sealing ring (902) is correspondingly arranged in each ring groove.

4. The automatic unloading device according to claim 1, wherein the blocking cover (901) is provided with an oil inlet channel (905), an inlet of the oil inlet channel (905) is connected with an upper port of the drainage tube (906), and an outlet of the oil inlet channel (905) is connected with an oil inlet of the one-way valve (903).

5. The automatic unloading device according to claim 1, wherein the blanking cover (901) is provided with an oil outlet channel (904), an inlet of the oil outlet channel (904) is connected with an oil outlet of the one-way valve (903), and an outlet of the oil outlet channel (904) is connected with the rodless cavity.

6. An oil-gas spring, characterized in that, the oil-gas spring includes a piston (3) and the automatic unloading device (9) of claims 1-5, the piston (3) is arranged in the oil-gas spring, the blanking cover (901) is arranged in the piston (3) in a sealing way, the check valve (903) is arranged in the blanking cover (901) in a sealing way, the oil outlet of the check valve (903) is communicated with the rodless cavity of the oil-gas spring, the oil inlet of the check valve (903) is communicated with the rod cavity of the oil-gas spring, the upper port of the drainage tube (906) is connected with the oil inlet of the check valve (903), and the lower port of the drainage tube (906) is arranged at the bottom of the rod cavity.

7. The hydrocarbon spring according to claim 6, further comprising a compression block (2), wherein the compression block (2) is arranged at the upper end inside the piston (3), the cap (901) is arranged at the lower end inside the piston (3), and the bottom of the compression block (2) is connected with the top of the cap (901).

8. The hydrocarbon spring of claim 6, further comprising:

the cylinder barrel (1), the opening of the cylinder barrel (1) is arranged downwards, and the piston (3) is arranged at the upper end inside the cylinder barrel (1);

the piston rod (4) is arranged at the lower end in the cylinder barrel (1), and the bottom of the piston (3) is connected with the top of the piston rod (4);

the guide sleeve (6) is arranged between the inner peripheral surface of the lower end of the cylinder barrel (1) and the outer peripheral surface of the lower end of the piston rod (4);

a spring seat (7) provided at the lower end of the piston rod (4).

9. The hydro-pneumatic spring as defined in claim 8, wherein the piston rod (4) is hollow inside and is communicated with the rod chamber, and an oil port at the upper end of the spring seat (7) is communicated with the inside of the piston rod (4).

10. The hydro-pneumatic spring as defined in claim 9, wherein a lower port of the draft tube (906) is disposed in an oil groove at an upper end of the spring seat (7).

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