Impact-proof balanced hydraulic cylinder

Abstract

This utility model discloses an anti-shock balanced hydraulic cylinder, comprising: a controller; a cylinder body divided into a rod chamber and a rodless chamber; and a main piston disposed within the cylinder body. Compared with the prior art, the anti-shock component effectively absorbs the impact force received by the hydraulic cylinder during operation, reducing damage to the internal structure of the hydraulic cylinder and improving its impact resistance and service life. Through the combination of the balancing component and the controller, pressure is monitored in real time by a pressure sensor. The controller precisely adjusts the flow rate of the balancing oil passage according to a preset program and strategy, allowing the hydraulic oil to flow reasonably between the rod chamber and the rodless chamber, achieving dynamic pressure balance, effectively preventing uneven load phenomena, and improving the working stability and accuracy of the hydraulic cylinder.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, and in particular to an anti-impact balanced hydraulic cylinder. Background Technology

[0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion. It has a simple structure and reliable operation. When used to achieve reciprocating motion, it eliminates the need for a speed reduction device, eliminates transmission backlash, and ensures smooth movement. As an actuator in hydraulic systems, hydraulic cylinders are widely used in engineering machinery, mining machinery, metallurgical equipment, and other fields.

[0003] In actual operation, existing hydraulic cylinders are often subjected to impact forces caused by sudden load changes and reversing shocks. These impact forces not only affect the working accuracy and stability of the hydraulic cylinders, but also reduce their service life and even lead to hydraulic system failures. Utility Model Content

[0004] The main purpose of this invention is to provide an anti-impact balanced hydraulic cylinder, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: an anti-impact balanced hydraulic cylinder, comprising:

[0006] Controller;

[0007] The cylinder body is divided into a rod chamber and a rodless chamber;

[0008] The main piston is disposed within the cylinder body;

[0009] A piston rod is fixedly mounted on the side wall of the main piston near the rod chamber, and the other end of the piston rod extends out of the cylinder body;

[0010] An anti-impact assembly is disposed within the cylinder body and is used to buffer the impact force on the cylinder body when the main piston moves rapidly to the end of its stroke.

[0011] A balancing assembly is disposed on the outside of the cylinder block, and the balancing assembly is used to achieve dynamic pressure balance between the rod chamber and the rodless chamber;

[0012] As a further description of the above technical solution, the anti-impact component includes two buffer chambers, which are respectively opened at both ends inside the cylinder. A buffer piston is provided in each buffer chamber, and a buffer spring is provided between the buffer piston and the side wall of the buffer chamber away from the main piston. The buffer chamber is connected to the inside of the cylinder through a throttling hole.

[0013] As a further description of the above technical solution, the balancing assembly includes a balancing oil passage, which is fixedly disposed on the outside of the cylinder block. The two ends of the balancing oil passage are respectively connected to the rod chamber and the rodless chamber. Pressure sensors are installed at both ends of the balancing oil passage, and a balancing valve is also installed on the balancing oil passage.

[0014] As a further description of the above technical solution, a rubber buffer pad is provided on one side wall of the buffer piston facing the inside of the cylinder.

[0015] As a further description of the above technical solution, both the pressure sensor and the balance valve are electrically connected to the controller.

[0016] As a further description of the above technical solution, the cylinder block is provided with two oil injection holes for connecting the rod chamber and the rodless chamber.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The anti-impact components effectively absorb the impact force received by the hydraulic cylinder during operation, reducing damage to the internal structure of the hydraulic cylinder and improving its impact resistance and service life.

[0019] 2. By combining the set balancing components with the controller, the pressure is monitored in real time by the pressure sensor. The controller controls the balancing valve to precisely adjust the flow of the balancing oil passage according to the preset program and strategy, so that the hydraulic oil flows reasonably between the rod chamber and the rodless chamber, realizing dynamic pressure balance, effectively avoiding the occurrence of off-center load, and improving the working stability and accuracy of the hydraulic cylinder. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of an anti-impact balanced hydraulic cylinder according to the present invention;

[0021] Figure 2 This is a cross-sectional view of the cylinder body of an anti-impact balanced hydraulic cylinder according to this utility model;

[0022] Figure 3 This is an enlarged structural diagram of point A of an anti-impact balanced hydraulic cylinder according to this utility model;

[0023] In the diagram: 1. Cylinder block; 11. Rod chamber; 12. Rodless chamber; 2. Main piston; 3. Piston rod; 4. Anti-shock assembly; 5. Balance assembly; 41. Buffer chamber; 42. Buffer piston; 43. Buffer spring; 44. Throttle orifice; 51. Balance oil passage; 52. Pressure sensor; 53. Balance valve; 421. Rubber buffer pad; 13. Oil injection hole. Detailed Implementation

[0024] To make the technical means, creative features, and objectives of this utility model easier to understand, the following describes this utility model in conjunction with specific embodiments.

[0025] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] 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 two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] Please see Figure 1-3 This utility model provides an anti-impact balanced hydraulic cylinder, comprising:

[0028] Controller;

[0029] Cylinder 1, which is divided into rod chamber 11 and rodless chamber 12;

[0030] Main piston 2 is located inside cylinder 1;

[0031] Piston rod 3 is fixedly mounted on the side wall of the main piston 2 near the rod chamber 11, and the other end of piston rod 3 extends out of the cylinder body 1;

[0032] The anti-impact component 4 is installed inside the cylinder body 1. The anti-impact component 4 is used to buffer the impact force on the cylinder body 1 when the main piston 2 moves rapidly to the end of its stroke.

[0033] The balancing assembly 5 is located on the outside of the cylinder body 1 and is used to achieve dynamic pressure balance between the rod chamber 11 and the rodless chamber 12.

[0034] The above-described structure enables the hydraulic cylinder to have shock resistance and pressure balance functions during use.

[0035] The anti-impact component 4 includes two buffer chambers 41, which are respectively opened at both ends inside the cylinder body 1. A buffer piston 42 is provided in the buffer chamber 41. A buffer spring 43 is provided between the buffer piston 42 and the side wall of the buffer chamber 41 away from the main piston 2. The buffer chamber 41 is connected to the inside of the cylinder body 1 through a throttle hole 44.

[0036] The above-mentioned structure can effectively absorb the impact force on the hydraulic cylinder during operation, reduce the damage to the internal structure of the cylinder body 1 caused by the impact force, and improve the impact resistance and service life of the hydraulic cylinder.

[0037] The balancing assembly 5 includes a balancing oil passage 51, which is fixedly installed on the outside of the cylinder block 1. The two ends of the balancing oil passage 51 are connected to the rod chamber 11 and the rodless chamber 12, respectively. Pressure sensors 52 are installed at both ends of the balancing oil passage 51, and a balancing valve 53 is also installed on the balancing oil passage 51.

[0038] By setting up the above structure, the balance valve 53 can be controlled to precisely adjust the flow rate of the balance oil passage 51, so that the hydraulic oil flows reasonably between the rod chamber 11 and the rodless chamber 12, achieving dynamic pressure balance, effectively avoiding the occurrence of off-center load, and improving the working stability and accuracy of the hydraulic cylinder.

[0039] Among them, the buffer piston 42 is provided with a rubber buffer pad 421 on one side wall facing the inside of the cylinder 1. The rubber buffer pad 421 provides additional elastic damping at the end of the buffering period, further absorbing energy and reducing direct collision between metal parts.

[0040] Both the pressure sensor 52 and the balance valve 53 are electrically connected to the controller.

[0041] It should be noted that the controller is a programmable logic controller (PLC), which has multiple input / output ports, connected to the pressure sensor 52 and the balance valve 53 via cables. The PLC has a pre-programmed pressure balance control program. Upon receiving a signal from the pressure sensor 52, it performs A / D conversion, filtering, and data analysis, comparing the signal with a preset pressure threshold. For example, if the preset pressure difference is 0.3 MPa, and the pressure difference between the rod chamber 11 and the rodless chamber 12 exceeds this threshold, the PLC outputs a corresponding control signal to the balance valve 53 according to the magnitude and trend of the difference, following a preset control strategy. The balance valve 53 is a proportional flow valve. Upon receiving the control signal from the PLC, it precisely adjusts the opening size of the balance oil passage through its internal electromagnet and valve core mechanism, changing the oil flow rate to quickly balance the pressure in the rod chamber 11 and the rodless chamber 12, ensuring stable operation of the hydraulic cylinder. Furthermore, the circuitry, electronic components, and controller involved are all existing technologies, fully achievable by those skilled in the art, and require no further explanation. This application does not involve any improvement to the software or method.

[0042] The cylinder body 1 is provided with two oil injection holes 13 for connecting the rod chamber 11 and the rodless chamber 12. Hydraulic oil enters the rod chamber 11 and the rodless chamber 12 through the oil injection holes 13 to drive the main piston 2 to move the piston rod 3.

[0043] It should be noted that this utility model is an anti-impact balanced hydraulic cylinder. During use, the external hydraulic pump starts, pressurizing the hydraulic oil in the tank and then delivering it to the rodless chamber 12 through pipelines, a reversing valve, and the oil filling port 13. At this time, the pressure in the rodless chamber 12 rapidly increases, pushing the main piston 2 and piston rod 3 outwards. Meanwhile, the hydraulic oil in the rod chamber 11, under the pressure of the main piston 2, flows back to the tank through the reversing valve, completing the circulation of the hydraulic oil. During the extension of the piston rod 3, if uneven load or other factors cause an imbalance in the pressure between the rod chamber 11 and the rodless chamber 12, the two pressure sensors 52 detect the pressure changes in the rod chamber 11 and the rodless chamber 12 and transmit the signals to the controller. After analysis, the controller determines that adjustment is needed. Then, the balance valve 53 is opened, and the hydraulic oil flows from the chamber with higher pressure to the chamber with lower pressure through the balance oil passage 51, which helps to balance the pressure of the two chambers and ensures that the piston rod 3 extends smoothly. When the piston rod 3 extends rapidly and approaches the end of its stroke, if an impact occurs, the hydraulic oil in the rod chamber 11 is squeezed. A part of the hydraulic oil enters the buffer chamber 41 on the side of the rod chamber 11 through the throttle orifice 44, pushing the buffer piston 42 to compress the buffer spring 43. During this process, the hydraulic oil at the throttle orifice 44 has a reduced flow rate and increased pressure due to the limited flow area, thus achieving buffering. At the same time, the buffer spring 43 further absorbs the impact energy and slows down the movement speed of the main piston 2. The rubber buffer pad also plays a buffering role, reducing the impact damage to the cylinder 1. During the retraction phase of piston rod 3, the directional valve switches the oil circuit, and the external hydraulic pump inputs pressurized hydraulic oil into the rod chamber 11. The pressure in the rod chamber 11 increases, pushing the main piston 2 to retract piston rod 3. The hydraulic oil in the rodless chamber 12 flows back to the oil tank through the directional valve under the action of the main piston 2, completing the reverse circulation of hydraulic oil, similar to the extension process. If the pressure of the two chambers is unbalanced during retraction, the pressure sensor 52 detects the signal and transmits it to the controller. The controller controls the balance valve 53 to operate, so that the hydraulic oil flows between the rod chamber 11 and the rodless chamber 12 through the balance oil passage 51, adjusting the pressure of the two chambers to ensure the stability of the piston rod 3 retraction action. When piston rod 3 is about to retract to the end of its stroke, the anti-impact component 4 on the rodless chamber 12 side buffers the main piston 2.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An anti-impact balanced hydraulic cylinder, characterized in that, include: Controller; The cylinder body (1) is divided into a rod chamber (11) and a rodless chamber (12). Main piston (2), which is disposed inside cylinder (1); Piston rod (3), the piston rod (3) is fixedly installed on the side wall of the main piston (2) near the rod chamber (11), and the other end of the piston rod (3) extends out of the cylinder body (1). An anti-impact component (4) is provided inside the cylinder body (1). The anti-impact component (4) is used to buffer the impact force on the cylinder body (1) when the main piston (2) moves rapidly to the end of its stroke. The balancing assembly (5) is disposed on the outside of the cylinder body (1) and is used to achieve dynamic pressure balance between the rod chamber (11) and the rodless chamber (12).

2. The anti-impact balanced hydraulic cylinder according to claim 1, characterized in that, The shock-absorbing component (4) includes two buffer chambers (41), which are respectively opened at both ends inside the cylinder (1). A buffer piston (42) is provided in the buffer chamber (41). A buffer spring (43) is provided between the buffer piston (42) and the side wall of the buffer chamber (41) away from the main piston (2). The buffer chamber (41) is connected to the inside of the cylinder (1) through a throttling hole (44).

3. The anti-impact balanced hydraulic cylinder according to claim 1, characterized in that, The balancing assembly (5) includes a balancing oil passage (51), which is fixedly installed on the outside of the cylinder block (1). The two ends of the balancing oil passage (51) are connected to the rod chamber (11) and the rodless chamber (12) respectively. Pressure sensors (52) are installed at both ends of the balancing oil passage (51). A balancing valve (53) is also installed on the balancing oil passage (51).

4. The anti-impact balanced hydraulic cylinder according to claim 2, characterized in that, The buffer piston (42) has a rubber buffer pad (421) on one side wall facing the inside of the cylinder (1).

5. The anti-impact balanced hydraulic cylinder according to claim 3, characterized in that, The pressure sensor (52) and the balance valve (53) are both electrically connected to the controller.

6. The anti-impact balanced hydraulic cylinder according to claim 1, characterized in that, The cylinder (1) is provided with two oil injection holes (13) for connecting the rod chamber (11) and the rodless chamber (12).

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