Integrated two-stage nitrogen-charged buffer hydraulic piston

Abstract

The utility model provides an integrated two-stage nitrogen filling buffer hydraulic piston, including oil cylinder and oil pressure piston, the lateral wall of oil cylinder is equipped with oil inlet, the oil pressure piston includes piston head and piston rod, the piston head is attached the inner wall of oil cylinder, the inside of piston head is integrally formed with air cavity, the piston rod is the hollow structure of two end closures, the inflation end of piston rod stretches out oil cylinder and the lateral wall of piston rod is equipped with inflation port near inflation end, the outlet end of piston rod stretches into air cavity and is fixedly connected with the air sealing piston perpendicularly, the air sealing piston is attached the inner wall of air cavity, the lateral wall of piston rod is equipped with gas outlet near outlet end, the piston rod is connected with air cavity through gas outlet, the utility model discloses the buffer structure is integrated in the hydraulic piston inside, need not to connect the buffer and the complex pipeline outward, simplifies the installation process, reduces the assembly difficulty, effectively saves the installation space of agricultural machine, guarantees the smooth operation of agricultural production work.

Description

Technical Field

[0001] This utility model relates to the field of buffer pressure piston technology, specifically an integrated two-stage nitrogen-filled buffer pressure piston. Background Technology

[0002] The hydraulic cylinder is a key hydraulic component in modern agricultural machinery that connects power equipment and agricultural implements. It contains a hydraulic piston and uses hydraulic power to precisely control the lifting, angle adjustment, and tilting of agricultural implements. It is not only a core device to solve the problem of insufficient rigidity in traditional mechanical connections and improve operational accuracy, but also an important foundation for adapting to diverse agricultural implements and supporting the modular and intelligent development of agricultural equipment. Its technological application is driving the transformation of agricultural production from extensive to intensive and efficient operations, and has become a typical technological background element for the upgrading of modern agricultural mechanization.

[0003] Existing tie rod cylinders all require external dampers for cushioning. However, in actual production and operation, external dampers involve multiple pipeline connections, which are complex and inconvenient to install. At the same time, agricultural machinery carries implements, and the connection space is limited. Tie rod cylinders with external dampers waste installation space and affect agricultural production. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides an integrated two-stage nitrogen-filled buffer pressure piston. The buffer structure is integrated inside the piston of the tie rod cylinder, and a two-stage nitrogen buffer is formed by the gas chamber and the sealing piston. This eliminates the need for external piping, resulting in a compact structure, space-saving design, and convenient installation.

[0005] To achieve its technical objectives, this utility model adopts the following technical solution:

[0006] An integrated two-stage nitrogen-filled hydraulic piston includes a cylinder and a hydraulic piston. The cylinder has an oil inlet on its side wall. The hydraulic piston includes a piston head and a piston rod. The piston head fits against the inner wall of the cylinder, and an air chamber is integrally formed inside the piston head. The piston rod is a hollow structure with both ends closed. The inflated end of the piston rod extends out of the cylinder, and an inflated port is formed on the side wall of the piston rod near the inflated end. The outlet end of the piston rod extends into the air chamber and is vertically fixedly connected to a sealing piston. The sealing piston fits against the inner wall of the air chamber, and an outlet is formed on the side wall of the piston rod near the outlet end. The piston rod communicates with the air chamber through the outlet.

[0007] Preferably, a sealing switch is provided at the air inlet.

[0008] More preferably, a pressure sensor is provided at the air inlet.

[0009] Preferably, the air cavity is filled with nitrogen gas for cushioning and shock absorption.

[0010] Preferably, the cylinder is completely sealed, and the hydraulic piston can move to the right along the inner wall of the cylinder under the push of the oil inside the cylinder.

[0011] Preferably, the right end of the hydraulic piston is provided with a bottom cover.

[0012] Preferably, a cylinder cover is provided at the oil inlet.

[0013] Preferably, a connector is fixedly provided at the end of the piston rod at the air-filling end and at the right end of the oil cylinder. The connector is used to connect the agricultural machinery and the external agricultural implement.

[0014] The beneficial effects of this utility model are as follows:

[0015] This invention integrates the buffer structure inside the piston head of the hydraulic piston, resulting in a compact overall structure that eliminates the need for additional external buffers and complex piping, simplifying the installation process and reducing assembly difficulty. At the same time, it effectively saves installation space on agricultural machinery and is more suitable for the limited connection environment when agricultural machinery is equipped with implements, thus helping to ensure the smooth operation of agricultural production. Attached Figure Description

[0016] Figure 1 This is a cross-sectional structural diagram of the present invention.

[0017] Figure label:

[0018] 1. Hydraulic cylinder; 2. Hydraulic piston; 3. Piston rod; 4. Air chamber; 5. Piston head; 6. Sealing piston; 7. Air inlet; 8. Air outlet; 9. Bottom cover; 10. Oil inlet; 11. Connecting parts; 12. Pressure sensor; 13. Sealing switch; 14. Hydraulic cylinder cover. Detailed Implementation

[0019] In the description of this utility model, it should be noted that the terms "upper / lower", "front / rear", "left / right", "inner / outer", "top / bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within the components of a compatible model. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, unless otherwise specified, all components used in this application are commercially available components, and the connection between different components can be achieved through conventional technical means.

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0022] An integrated two-stage nitrogen-filled buffer pressure piston, such as Figure 1 As shown, the system includes a hydraulic cylinder 1 and a hydraulic piston 2. The hydraulic cylinder 1 has an oil inlet 10 on its side wall. The hydraulic piston 2 includes a piston head 5 and a piston rod 3. The piston head 5 is fitted to the inner wall of the hydraulic cylinder 1, and an air chamber 4 is integrally formed inside the piston head 5. The piston rod 3 is a hollow structure with both ends closed. The inflation end (left end in the figure) of the piston rod 3 extends out of the hydraulic cylinder 1, and an inflation port 7 is provided on the side wall of the piston rod 3 near the inflation end. The exhaust end (right end in the figure) of the piston rod 3 extends into the air chamber 4 and is vertically fixedly connected to a sealing piston 6. The sealing piston 6 is fitted to the inner wall of the air chamber 4, and an exhaust port 8 is provided on the side wall of the piston rod 3 near the exhaust end. The piston rod 3 is connected to the air chamber 4 through the exhaust port 8. The air chamber 4 and the sealing piston 6 form a built-in two-stage nitrogen buffer structure.

[0023] Preferably, a sealing switch 13 and a pressure sensor 12 are provided at the air inlet 7. In this embodiment, the sealing switch 13 is a rubber plug. In practical applications, the sealing switch 13 can be a screw cap with a sealing ring or other components, as long as it can achieve the effect of sealing and closing. At the same time, the pressure sensor 12 is electrically connected to the external nitrogen filling device to monitor and control the amount of nitrogen filling in real time.

[0024] Preferably, the air chamber 4 is filled with nitrogen gas for cushioning and shock absorption.

[0025] Preferably, the cylinder 1 is completely sealed, and the hydraulic piston 2 can move to the right along the inner wall of the cylinder 1 under the push of the oil in the cylinder 1.

[0026] Preferably, the right end of the hydraulic piston 2 is provided with a bottom cover 9.

[0027] Preferably, a cylinder cover 14 is provided at the oil inlet 10.

[0028] Preferably, a connector 11 is fixedly provided at the end of the piston rod 3 at the air-filling end and at the right end of the cylinder 1. The connector 11 is used to connect the agricultural machinery and the external implement. In this embodiment, the connector 11 is specifically a connecting ring. The external implement and the agricultural machinery can be assembled together simply and quickly by using the connecting ring in conjunction with the pin.

[0029] The application scenarios and operation methods of this utility model are as follows:

[0030] Hydraulic oil is injected into cylinder 1 through inlet 10. During this process, as the amount of hydraulic oil increases, the hydraulic piston 2 will move to the right (inward) under the push of the hydraulic oil and eventually be fixed. Nitrogen is injected into air chamber 4 through air inlet 7. The connecting parts 11 at both ends of the piston are connected to the rear end of the agricultural machinery and the implement, respectively. When the agricultural machinery is operated to stop the implement from rising or falling, the implement will still move a short distance under the action of inertia. At this time, the implement will drag the sealing piston 6 to the left (outward) through piston rod 3. However, since the air chamber 4 is filled with a large amount of nitrogen, the nitrogen is compressed and prevents the sealing piston 6 from moving to the left (outward), thus providing a buffer for the inertial movement of the implement and reducing damage to mechanical parts. When the implement is no longer in an inertial state, the external force on the sealing piston 6 disappears, and the compressed nitrogen in the air chamber 4 will rebound, thus making the sealing piston 6 return to its original position, preparing for the next buffering.

[0031] Although the embodiments of this utility model have been described in the specification, these embodiments are merely illustrative and should not limit the scope of protection of this utility model. Various omissions, substitutions, and modifications made without departing from the spirit of this utility model should be included within the scope of protection of this utility model.

Claims

1. An integrated two-stage nitrogen-filled hydraulic piston, comprising a hydraulic cylinder and a hydraulic piston, wherein the side wall of the hydraulic cylinder has an oil inlet, characterized in that, The hydraulic piston includes a piston head and a piston rod. The piston head fits against the inner wall of the hydraulic cylinder, and an air chamber is integrally formed inside the piston head. The piston rod is a hollow structure with both ends closed. The inflatable end of the piston rod extends out of the hydraulic cylinder, and an inflatable port is opened on the side wall of the piston rod near the inflatable end. The venting end of the piston rod extends into the air chamber and is vertically fixedly connected to a sealing piston. The sealing piston fits against the inner wall of the air chamber, and an venting port is opened on the side wall of the piston rod near the venting end. The piston rod communicates with the air chamber through the venting port.

2. The integrated two-stage nitrogen-filled buffer pressure piston as described in claim 1, characterized in that, A sealing switch is provided at the air inlet.

3. An integrated two-stage nitrogen-filled buffer pressure piston as described in claim 1 or 2, characterized in that, A pressure sensor is installed at the air inlet.

4. The integrated two-stage nitrogen-filled buffer pressure piston as described in claim 1, characterized in that, The air chamber is filled with nitrogen gas for cushioning and shock absorption.

5. The integrated two-stage nitrogen-filled buffer pressure piston as described in claim 1, characterized in that, The cylinder is completely sealed, and the hydraulic piston can move to the right along the inner wall of the cylinder under the push of the oil inside the cylinder.

6. The integrated two-stage nitrogen-filled buffer pressure piston as described in claim 1, characterized in that, A bottom cover is provided at the right end of the hydraulic piston.

7. The integrated two-stage nitrogen-filled buffer pressure piston as described in claim 1, characterized in that, A cylinder cover is provided at the oil inlet.

8. The integrated two-stage nitrogen-filled buffer pressure piston as described in claim 1, characterized in that, Both the inflatable end of the piston rod and the right end of the hydraulic cylinder are fixedly provided with connecting parts, which are used to connect agricultural machinery and external agricultural implements.

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