Large oil cylinder safety buffer device

Abstract

The utility model discloses a large oil cylinder safety buffer device which is arranged in an oil cylinder, the oil cylinder comprises a bottom plate, a cylinder body and a piston rod, the bottom plate is arranged at the bottom of the cylinder body, the bottom end of the piston rod is located in the cylinder body, the top end of the piston rod penetrates through a sealing ring, the sealing ring is fixed to the top of the cylinder body, and the large oil cylinder safety buffer device comprises two fixing units and a plurality of tension springs. The two fixing units are arranged at the bottom of the piston rod and the top of the bottom plate respectively, the tension springs are evenly distributed between the two fixing units, the piston rod is provided with a pressure relief pipe, and the top end of the pressure relief pipe is in threaded fit with a pressure relief bolt. According to the large oil cylinder safety buffering device, the tension spring arranged between the piston rod and the bottom plate is adopted to provide power for resetting of the piston rod, and hydraulic oil can be discharged in cooperation with the pressure relief pipe, so that the piston rod returns to the initial state when power is cut off.

Description

Technical Field

[0001] This utility model relates to hydraulic cylinder technology, specifically a safety buffer device for a large hydraulic cylinder. Background Technology

[0002] Hydraulic cylinders are widely used industrial automation devices. They are hydraulic actuators that convert hydraulic energy into mechanical energy, performing linear reciprocating motion (or oscillating motion). They are simple in structure and reliable in operation. When used to achieve reciprocating motion, they eliminate the need for a speed reduction device and have no transmission backlash, resulting in smooth movement. Therefore, they are widely used in the hydraulic systems of various machines.

[0003] When a hydraulic cylinder experiences a sudden power outage during hydraulic operation, the hydraulic cylinder's oil supply system and electronic components such as solenoid valves will cease to function. At this time, the piston rod of the hydraulic cylinder will lock up. When the hydraulic cylinder is in a dead position, a gap will form between the piston and the cylinder wall, leading to oil leakage and pressure drop. Furthermore, prolonged stillness will cause the sealing elements to be subjected to additional pressure, resulting in aging, wear, or deformation, which in turn will cause oil leakage, thereby affecting the normal operation of the hydraulic system and the lifespan of the equipment. Utility Model Content

[0004] To address the shortcomings of the prior art, this utility model provides a safety buffer device for a large hydraulic cylinder, which can return the piston rod to its initial state when power is cut off.

[0005] To achieve the above technical objectives, this utility model adopts the following technical solution: a large hydraulic cylinder safety buffer device, installed inside the hydraulic cylinder, the hydraulic cylinder including a base plate, a cylinder body and a piston rod, the base plate being installed at the bottom of the cylinder body, the bottom end of the piston rod being located inside the cylinder body, the top end of the piston rod passing through a sealing ring, the sealing ring being fixed to the top of the cylinder body, including two fixing units and several tension springs, the two fixing units being respectively installed at the bottom of the piston rod and the top of the base plate, the several tension springs being evenly distributed between the two fixing units, the piston rod being provided with a pressure relief pipe, the top end of the pressure relief pipe being threaded with a pressure relief bolt.

[0006] Preferably, the fixing unit includes a mounting base and several spring seats. The mounting base is fixed to the piston rod or to the base plate by a locking pin. The several spring seats are evenly distributed on the mounting base, and the spring seats are fixed to the ends of the tension springs.

[0007] Preferably, the piston rod has an oil cavity on the side facing the base plate, and the two fixing units and several tension springs are all located in the oil cavity.

[0008] Preferably, the bottom sidewall of the cylinder is provided with an oil inlet.

[0009] Preferably, the cylinder body is provided with lifting lugs on both sides.

[0010] Preferably, the cylinder body is provided with a mounting flange on the top.

[0011] In summary, this utility model achieves the following technical effects:

[0012] The large hydraulic cylinder safety buffer device of this utility model adopts a tension spring set between the piston rod and the base plate to provide the power for the piston rod to reset, and can discharge hydraulic oil in conjunction with the pressure relief pipe, so that the piston rod returns to the initial state when the power is cut off. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the installation structure of the large hydraulic cylinder safety buffer device of this utility model;

[0014] Figure 2 This is a structural schematic diagram of the large hydraulic cylinder safety buffer device of this utility model;

[0015] Explanation of the markings on the attached drawings: 1. Cylinder body; 2. Base plate; 3. Piston rod; 4. Sealing ring; 5. Mounting flange; 6. Mounting seat; 8. Spring seat; 9. Tension spring; 10. Lifting lug; 12. Oil chamber; 13. Oil inlet; 14. Pressure relief pipe; 15. Lower locking pin; 16. Upper locking pin. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to the accompanying drawings.

[0017] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

[0018] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0020] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0021] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0022] Example 1:

[0023] like Figure 1 As shown, a large hydraulic cylinder safety buffer device is installed inside the hydraulic cylinder. The hydraulic cylinder includes a base plate 2, a cylinder body 1, and a piston rod 3. The base plate 2 is located at the bottom of the cylinder body 1. The bottom end of the piston rod 3 is located inside the cylinder body 1, and the top end of the piston rod 3 passes through a sealing ring 4. The sealing ring 4 is fixed to the top of the cylinder body 1. It includes two fixing units and several tension springs 9. The two fixing units are respectively located at the bottom of the piston rod 3 and the top of the base plate 2. The several tension springs 9 are evenly distributed between the two fixing units. The piston rod 3 is provided with a pressure relief pipe 14, and the top end of the pressure relief pipe 14 is threaded with a pressure relief bolt. The bottom side wall of the cylinder body 1 is provided with an oil inlet 13.

[0024] The large hydraulic cylinder safety buffer device in this embodiment uses a pressure relief pipe 14. When the power is off, the operator can manually unscrew the pressure relief bolt to discharge the hydraulic oil. In conjunction with the tension spring 9 set between the piston rod 3 and the base plate 2, it provides the power for the piston rod 3 to reset, so that the piston rod 3 can slowly return to the initial state when the power is off.

[0025] like Figure 2 As shown, the fixing unit includes a mounting base 7 and several spring seats 8. The mounting base 7 is fixed to the piston rod 3 or to the base plate 2 by a locking pin 16. Several spring seats 8 are evenly distributed on the mounting base 7, and the spring seats 8 are fixed to the ends of the tension springs 9.

[0026] The piston rod 3 has an oil chamber 12 on the side facing the base plate 2. Two fixing units and several tension springs 9 are located in the oil chamber 12. The oil chamber 12 can effectively utilize the space inside the piston rod 3 and cylinder 1, making the cylinder 1 structure compact and the stroke longer. At the same time, it can shorten the length of the pressure relief pipe 14 and reduce the processing difficulty.

[0027] Both sides of the cylinder body 1 are provided with lifting lugs 10; the lifting lugs 10 can facilitate the hoisting of the entire cylinder and the accurate movement of the cylinder to the installation position.

[0028] The cylinder body 1 is provided with a mounting flange 5 on its top; the mounting flange 5 is used to facilitate the installation of the cylinder body 1 on the mounting surface of the machine tool, base, etc.

[0029] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall fall within the scope of the technical solution of the present utility model.

Claims

1. A safety buffer device for a large hydraulic cylinder, disposed inside the hydraulic cylinder, the hydraulic cylinder comprising a base plate, a cylinder body, and a piston rod, the base plate being disposed at the bottom of the cylinder body, the bottom end of the piston rod being located inside the cylinder body, the top end of the piston rod passing through a sealing ring, the sealing ring being fixed to the top of the cylinder body, characterized in that, It includes two fixing units and several tension springs. The two fixing units are respectively located at the bottom of the piston rod and the top of the base plate. The several tension springs are evenly distributed between the two fixing units. The piston rod is provided with a pressure relief pipe, and a pressure relief bolt is threaded at the top of the pressure relief pipe.

2. The safety buffer device for a large hydraulic cylinder according to claim 1, characterized in that, The fixing unit includes a mounting base and several spring seats. The mounting base is fixed to the piston rod or the base plate by a locking pin. The several spring seats are evenly distributed on the mounting base, and the spring seats are fixed to the ends of the tension springs.

3. A large hydraulic cylinder safety buffer device according to claim 1, characterized in that, The piston rod has an oil chamber on the side facing the base plate, and two fixing units and several tension springs are located in the oil chamber.

4. A large hydraulic cylinder safety buffer device according to claim 1, characterized in that, The cylinder block has an oil inlet on its bottom side wall.

5. A large hydraulic cylinder safety buffer device according to claim 1, characterized in that, The cylinder body is equipped with lifting lugs on both sides.

6. A large hydraulic cylinder safety buffer device according to claim 1, characterized in that, The cylinder body is equipped with a mounting flange on top.

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