Hydro-pneumatic suspension composite guide sleeve

Abstract

The utility model discloses a hydro-pneumatic suspension composite guide sleeve which is applied to the field of hydro-pneumatic composite elastic suspension devices and comprises a first guide sleeve, the bottom of one side of the first guide sleeve is connected with a second guide sleeve through an oil conveying guide pipe, and a first air chamber assembly is arranged in the first guide sleeve. When the main piston is pushed by high pressure of inert gas to reset, the main piston moves downwards, the air pressure in the main air chamber is reduced, oil liquid below the main piston is squeezed, and the main piston is driven by the first air chamber assembly to reset. The oil flows back to the lower portion of the movable piston through the channel, the movable piston is pushed to move upwards, the air pressure in the back pressure air chamber is increased, damping buffering is conducted on the main piston through oil below the main piston, and the possibility that the main piston collides with the bottom of the inner wall of the first guide sleeve in the main piston reset stroke is eliminated.

Description

Technical Field

[0001] The utility model relates to the technical field of oil-gas composite elastic suspension devices, and particularly relates to an oil-gas suspension composite guide sleeve. Background Technique

[0002] The oil-gas suspension composite guide sleeve is a guide sleeve that combines an oil-gas composite guiding device, aiming to achieve stable support and positioning of bearings, shafts, and vibrating components in a mechanical transmission system. When mechanical components are subjected to external impacts or vibrations, the gas and liquid in the oil-gas suspension composite guide sleeve will undergo corresponding compression and expansion, thereby providing damping and elastic effects to absorb and disperse the impact force.

[0003] Common oil-gas suspension composite guide sleeves generally have a single air chamber, and the piston is used to push the oil to impact the inert gas. Generally, the common oil-gas suspension composite guide sleeve does not have a corresponding protective structure at the bottom of the guide sleeve. When the piston is pushed back by high-pressure inert gas, it is easy to collide with the bottom of the inner wall of the guide sleeve, which is easy to damage the guide sleeve. Therefore, an oil-gas suspension composite guide sleeve is needed to solve the above problems. Content of the Utility Model

[0004] The purpose of the utility model is to provide an oil-gas suspension composite guide sleeve to solve the problems raised in the above background technique: generally, the common oil-gas suspension composite guide sleeve does not have a corresponding protective structure at the bottom of the guide sleeve. When the piston is pushed back by high-pressure inert gas, it is easy to collide with the bottom of the inner wall of the guide sleeve, which is easy to damage the guide sleeve.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: an oil-gas suspension composite guide sleeve, including a first guide sleeve, the bottom of one side of the first guide sleeve is connected to a second guide sleeve through an oil delivery conduit, a first air chamber assembly is arranged inside the first guide sleeve, a second air chamber assembly is arranged inside the second guide sleeve, the top of one side of the first guide sleeve is connected to a first airbag through a first air duct, the top of one side of the second guide sleeve is connected to a backpressure airbag through a second air duct, a piston rod is inserted into the bottom of the first guide sleeve, one end of the piston rod extends into the first guide sleeve and is connected to the first air chamber assembly, and fuel filling ports are arranged at the bottoms of one sides of the first guide sleeve and the second guide sleeve, and each fuel filling port is threadedly connected with a fuel filling sealing plug.

[0006] Preferably, the first air chamber assembly includes a main air chamber and a first oil chamber, and the main air chamber and the first oil chamber are separated by a first elastic diaphragm.

[0007] Preferably, the top of the main air chamber is communicated with the first air duct, a sealing member is fixedly arranged at the bottom of the inner wall of the first guide sleeve, and one end of the piston rod extends into the first oil chamber and is fixedly connected with a main piston.

[0008] Preferably, the second air chamber assembly includes a back pressure air chamber and a second oil chamber, and the back pressure air chamber and the second oil chamber are separated by a second elastic diaphragm.

[0009] Preferably, the top of the back pressure air chamber is communicated with a second air duct, and the second oil chamber is communicated with the first oil chamber through an oil delivery duct.

[0010] Preferably, a damping valve is installed on the inner wall of the second oil chamber near the oil delivery duct, and a movable piston is slidably connected to the inner wall of the second oil chamber near the second elastic diaphragm.

[0011] The technical effects and advantages of the present utility model:

[0012] (1) When the main piston is reset under the high pressure of inert gas in this device, the main piston moves downward, the air pressure in the main air chamber decreases, the oil liquid under the main piston is squeezed, flows back through the channel to the lower part of the movable piston, pushes the movable piston upward, and increases the air pressure in the back pressure air chamber. And the oil liquid under the main piston damps and buffers the main piston, eliminating the possibility of impact between the main piston and the bottom of the inner wall of the first guiding sleeve during the reset stroke of the main piston, solving the problem that the common oil-gas suspension composite guiding sleeve generally does not have a corresponding protection structure at the bottom of the guiding sleeve, and it is easy to collide with the bottom of the inner wall of the guiding sleeve when the piston is reset under the push of high-pressure inert gas, which is easy to damage the guiding sleeve;

[0013] (2) In this device, the impact force from the outside can be transmitted to the main piston through the piston rod provided. The oil liquid in the first oil chamber is pushed by the main piston, and the first elastic diaphragm is pushed to compress the space occupied by the inert gas inside the main air chamber, increasing the air pressure in the main air chamber, which can bear the buffering of the impact force. At this time, the oil liquid below the movable piston flows into the lower part of the main piston in the first oil chamber through the channel under the action of the pressure of the back pressure air chamber body, supplementing the volume vacated after the main piston moves upward, and the air pressure in the back pressure air chamber decreases. Description of the Drawings

[0014] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0015] Figure 2 is a schematic diagram of the internal connection structure of the first guiding sleeve and the second guiding sleeve in the present utility model;

[0016] Figure 3 is a schematic diagram of the internal structure of the second guiding sleeve in the present utility model.

[0017] In the figure: 1. First guiding sleeve; 2. Second guiding sleeve; 3. Oil delivery conduit; 4. Piston rod; 5. Refueling seal plug; 6. First air chamber assembly; 601. Main air chamber; 602. First elastic diaphragm; 603. First oil chamber; 604. Main piston; 605. Seal; 7. Second air chamber assembly; 701. Back-pressure air chamber; 702. Second elastic diaphragm; 703. Moving piston; 704. Damper valve; 705. Second oil chamber; 8. First airbag; 9. Back-pressure airbag. Detailed implementation manners

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0019] The present invention provides an oil-gas suspension composite guiding sleeve as Figures 1 - 3 shown, which includes a first guiding sleeve 1. The bottom of one side of the first guiding sleeve 1 is connected to a second guiding sleeve 2 through an oil delivery conduit 3. A first air chamber assembly 6 is arranged inside the first guiding sleeve 1, and a second air chamber assembly 7 is arranged inside the second guiding sleeve 2. The top of one side of the first guiding sleeve 1 is connected to a first airbag 8 through a first air duct, and the top of one side of the second guiding sleeve 2 is connected to a back-pressure airbag 9 through a second air duct. The bottom of the first guiding sleeve 1 is inserted with a piston rod 4. One end of the piston rod 4 extends into the first guiding sleeve 1 and is connected to the first air chamber assembly 6. Refueling ports are arranged at the bottoms of one sides of the first guiding sleeve 1 and the second guiding sleeve 2, and each refueling port is threadedly connected with a refueling seal plug 5.

[0020] As Figures 1 - 3The shown oil-gas suspension composite guide sleeve, the first air chamber assembly 6 includes a main air chamber 601 and a first oil chamber 603. The main air chamber 601 and the first oil chamber 603 are separated by a first elastic diaphragm 602. The top of the main air chamber 601 is communicated with the first air duct. A seal 605 is fixedly arranged at the bottom of the inner wall of the first guide sleeve 1. One end of the piston rod 4 extends into the interior of the first oil chamber 603 and is fixedly connected with a main piston 604. The second air chamber assembly 7 includes a back pressure air chamber 701 and a second oil chamber 705. The back pressure air chamber 701 and the second oil chamber 705 are separated by a second elastic diaphragm 702. The top of the back pressure air chamber 701 is communicated with the second air duct. The second oil chamber 705 is communicated with the first oil chamber 603 through an oil delivery duct 3. A damping valve 704 is installed near the oil delivery duct 3 on the inner wall of the second oil chamber 705. A movable piston 703 is slidably connected near the second elastic diaphragm 702 on the inner wall of the second oil chamber 705.

[0021] The working principle of the present utility model: The piston rod 4 can transmit the external impact force to the main piston 604. The main piston 604 pushes the oil in the first oil chamber 603, and pushes the first elastic diaphragm 602 to compress the space occupied by the inert gas inside the main air chamber 601. The air pressure in the main air chamber 601 increases, which can bear the buffer of the impact force. At this time, the oil below the movable piston 703 flows into the space below the main piston 604 in the first oil chamber 603 under the action of the body pressure of the back pressure air chamber 701 through the channel, supplementing the volume vacated after the main piston moves upward. And the air pressure in the back pressure air chamber 701 decreases. When the main piston 604 is reset under the high pressure of the inert gas, the main piston 604 moves downward, the air pressure in the main air chamber 601 decreases, the oil below the main piston 604 is squeezed, and flows back below the movable piston 703 through the channel, pushing the movable piston 703 upward, and increasing the air pressure in the back pressure air chamber 701. And damping buffer is carried out on the main piston 604 through the oil below the main piston 604, eliminating the possibility of collision between the main piston 604 and the bottom of the inner wall of the first guide sleeve 1 during the reset stroke of the main piston 604. The two oil filling and sealing plugs 5 can respectively supplement oil to the first guide sleeve 1 and the second guide sleeve 2.

[0022] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "set", "installed", "connected", "connected", "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0023] All the standard parts used in the utility model can be purchased from the market, and the special-shaped parts can be customized according to the description of the specification and the drawings.

[0024] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A composite guide sleeve for oil-gas suspension, comprising a first guide sleeve (1), characterized in that: The bottom of one side of the first guide sleeve (1) is connected to the second guide sleeve (2) via an oil delivery conduit (3); a first air chamber assembly (6) is arranged inside the first guide sleeve (1); a second air chamber assembly (7) is arranged inside the second guide sleeve (2); the top of one side of the first guide sleeve (1) is connected to the first air bag (8) via a first air guide pipe; the top of one side of the second guide sleeve (2) is connected to the back pressure air bag (9) via a second air guide pipe; a piston rod (4) is inserted into the bottom of the first guide sleeve (1); one end of the piston rod (4) extends to the inside of the first guide sleeve (1) and is connected to the first air chamber assembly (6); a refueling port is arranged at the bottom of one side of the first guide sleeve (1) and the second guide sleeve (2); each of the refueling ports is threadedly connected to a refueling sealing plug (5).

2. The oil-gas suspension composite guide sleeve according to claim 1, characterized in that: The first air chamber assembly (6) comprises a main air chamber (601) and a first oil chamber (603), wherein the main air chamber (601) and the first oil chamber (603) are separated by a first elastic diaphragm (602).

3. The oil-gas suspension composite guide sleeve according to claim 2 is characterized in that: The top of the main air chamber (601) is connected to the first air guide pipe, a seal (605) is fixedly arranged at the bottom of the inner wall of the first guide sleeve (1), and one end of the piston rod (4) extends to the inside of the first oil chamber (603) and is fixedly connected to the main piston (604).

4. The oil-gas suspension composite guide sleeve according to claim 2 is characterized in that: The second air chamber assembly (7) comprises a back-pressure air chamber (701) and a second oil chamber (705), and the back-pressure air chamber (701) and the second oil chamber (705) are separated by a second elastic diaphragm (702).

5. The oil-gas suspension composite guide sleeve according to claim 4 is characterized in that: The top of the counter-pressure air chamber (701) is connected to the second air guide pipe, and the second oil chamber (705) is connected to the first oil chamber (603) via an oil delivery conduit (3).

6. The oil-gas suspension composite guide sleeve according to claim 4, characterized in that: A damping valve (704) is installed on the inner wall of the second oil chamber (705) near the oil delivery conduit (3), and a movable piston (703) is slidably connected to the inner wall of the second oil chamber (705) near the second elastic diaphragm (702).

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