A one-piece plug with head reinforcement

Abstract

This utility model discloses an integral piston rod with a head reinforcement structure, including a hydraulic cylinder body, a piston rod body mounted on the hydraulic cylinder body, a tapered end of the piston rod body, a reinforcing tube sleeved on one end of the piston rod body, a hexagonal reinforcing block fixed to one end of the reinforcing tube, and one end of the piston rod body detachably installed inside the reinforcing tube. This utility model can effectively disperse impact loads, avoid stress concentration, and reduce the risk of cracks caused by stress fatigue. The combination of the reinforcing tube and the hexagonal reinforcing block further enhances the strength and protection of the head, enabling the piston rod to better cope with harsh working environments. It effectively reduces equipment downtime and maintenance costs caused by piston rod failure. High reliability and stability allow the hydraulic system to operate more stably, improving the overall operating efficiency of mechanical equipment and reducing safety hazards caused by malfunctions.

Description

Technical Field

[0001] This utility model relates to the field of stopper rod technology, and in particular to an integral stopper rod with a head reinforcement structure. Background Technology

[0002] A piston rod is a mechanical transmission component mainly used to control parameters such as operation, flow rate, or pressure of valves or mechanical devices. It controls the flow rate or velocity of media (such as water, gas, or oil) through up-and-down movement or rotation, thereby achieving control and regulation of machinery and equipment. When a hydraulic valve is closed or opened, the piston rod head bears the impact load of the valve opening and closing, forming a localized high-stress zone, which is prone to cracking due to stress fatigue. Once cracks appear, they not only affect the normal operation of the piston rod, leading to a decrease in the performance of the hydraulic system, but may also cause more serious equipment failures or even safety accidents. Therefore, we propose an integral piston rod with a head-reinforced structure to solve the above problems. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing an integral stopper rod with a head reinforcement structure.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An integral piston rod with a head reinforcement structure includes a hydraulic cylinder body, on which a piston rod is mounted. One end of the piston rod has a tapered end, and a reinforcing tube is sleeved on one end of the piston rod. A hexagonal reinforcing block is fixed to one end of the reinforcing tube. One end of the piston rod is detachably installed inside the reinforcing tube, and the tapered end is snapped into the hexagonal reinforcing block. A circular mounting plate is fixed to one end of the hexagonal reinforcing block, and a connector is detachably connected to one end of the circular mounting plate.

[0006] Preferably, one side of the piston rod body is provided with multiple external threads, and the reinforcing tube is provided with a threaded blind hole, the threaded blind hole and the external threads are screwed together.

[0007] Preferably, the hexagonal reinforcing block is provided with a conical groove, the threaded blind hole and the conical groove are connected, and the conical end is engaged in the conical groove.

[0008] Preferably, the piston rod body and the tapered end are integrally formed.

[0009] Preferably, the circular mounting plate has four mounting holes at equal intervals around its circumference, and a screw is inserted through each mounting hole, with one end of the screw extending into the connector.

[0010] Preferably, the surface of the piston rod is subjected to nitriding treatment.

[0011] In this utility model:

[0012] 1. Installation process

[0013] First, the reinforcing tube is fitted onto the end of the piston rod body with external threads. Since the reinforcing tube has a threaded blind hole, by rotating the reinforcing tube, the threaded blind hole and the external thread are screwed together, and the reinforcing tube is firmly installed on the piston rod body. At this time, the tapered end of one end of the piston rod body will be inserted into the tapered groove in the hexagonal reinforcing block. Because the threaded blind hole and the tapered groove are connected, this snap-fit ​​method further ensures the connection stability between the reinforcing tube, the hexagonal reinforcing block and the piston rod body. Next, screws are passed through the four mounting holes that are evenly distributed around the circumference of the circular mounting plate, and one end of the screw is extended into the connector, thereby detachably connecting the circular mounting plate and the connector together.

[0014] 2. Work Process

[0015] When the hydraulic cylinder body is working, the pressure of the hydraulic oil pushes the piston rod to move linearly. The movement of the piston rod is transmitted to the connected mechanical device, such as the hydraulic valve, through the connecting parts, thereby realizing the opening and closing operation of the valve. In this process, when the valve opening and closing generates impact load, the tapered end structure of the piston rod head will disperse the impact load and avoid local stress concentration. At the same time, the reinforcing tube and the hexagonal reinforcing block will work together to further improve the strength and protection of the piston rod head, ensuring that the piston rod can work stably and reliably.

[0016] The piston rod body is made of 42CrMo alloy steel, which has high tensile strength (≥1080MPa) and yield strength (≥930MPa), providing a solid foundation for the piston rod's strength. Surface nitriding treatment increases the surface hardness of the piston rod body to over HRC50, greatly enhancing its wear resistance and scratch resistance, reducing damage caused by friction and wear, and extending the service life of the piston rod. The tapered end structure of the head can effectively disperse impact loads, avoid stress concentration, and reduce the risk of cracks caused by stress fatigue. The combination of the reinforcing tube and the hexagonal reinforcing block further improves the strength and protection of the head, enabling the piston rod to better cope with harsh working environments.

[0017] This utility model has the following advantages:

[0018] 1. It can effectively disperse impact loads, avoid stress concentration, and reduce the risk of cracks caused by stress fatigue. The combination of the reinforcing tube and the hexagonal reinforcing block further improves the strength and protection of the head, enabling the piston rod to better cope with harsh working environments.

[0019] 2. The connection method of the reinforcing tube being screwed into the external thread of the piston rod body through the threaded blind hole and the tapered end being snapped into the tapered groove ensures the stability and tightness of the connection between the components. The stable connection ensures that there will be no loosening or displacement between the components during the operation of the piston rod, thereby ensuring the normal operation of the hydraulic system.

[0020] In summary, this invention can effectively disperse impact loads, avoid stress concentration, and reduce the risk of cracks caused by stress fatigue. The combination of the reinforcing tube and the hexagonal reinforcing block further enhances the strength and protection of the head, enabling the piston rod to better cope with harsh working environments. It effectively reduces equipment downtime and maintenance costs caused by piston rod failures. The high reliability and stability enable the hydraulic system to work more stably, improve the overall operating efficiency of mechanical equipment, and reduce safety hazards caused by failures. Attached Figure Description

[0021] Figure 1 This is an installation structure diagram of the present invention;

[0022] Figure 2 A structural diagram showing the tapered end of this utility model;

[0023] Figure 3 This is a structural diagram of the threaded blind hole and tapered groove connection of this utility model;

[0024] Figure 4 A structural diagram of the threaded blind hole configuration of this utility model;

[0025] Figure 5 for Figure 1 Enlarged view of the structure at point A.

[0026] In the diagram: 1. Hydraulic cylinder body, 2. Piston rod body, 3. Connector, 4. Tapered end, 5. External thread, 6. Threaded blind hole, 7. Circular mounting plate, 8. Screw, 9. Hexagonal reinforcing block, 10. Mounting hole, 11. Tapered groove, 12. Reinforcing tube. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0028] Reference Figure 1-5 An integral piston rod with a head reinforcement structure includes a hydraulic cylinder body 1. The hydraulic cylinder body 1 serves as the power source for the entire piston rod device, providing power for the movement of the piston rod body 2. The piston rod body 2 is driven to make linear motion by the pressure change of hydraulic oil inside the cylinder body 1.

[0029] A piston rod 2 is mounted on the hydraulic cylinder body 1. The piston rod 2 is a key component for transmitting power, which transmits the power generated by the hydraulic cylinder body 1 to the connecting part 3, thereby driving the mechanical device connected thereto.

[0030] One end of the piston rod body 2 is provided with a tapered end 4. The tapered end 4 can effectively disperse the impact load during operation, avoid local stress concentration, and improve the service life and reliability of the piston rod.

[0031] A reinforcing tube 12 is sleeved on one end of the piston rod body 2. The reinforcing tube 12 is sleeved on one end of the piston rod body 2. Through the threaded connection with the piston rod body 2, the strength and stability of the head of the piston rod body 2 are enhanced. When the piston rod is impacted, it can share some of the stress and protect the piston rod body 2 from damage.

[0032] One end of the reinforcing tube 12 is fixed with a hexagonal reinforcing block 9. One end of the piston rod body 2 is detachably installed inside the reinforcing tube 12, and the tapered end 4 is snapped into the hexagonal reinforcing block 9. The snapping method not only further ensures the connection stability between the reinforcing tube 12, the hexagonal reinforcing block 9 and the piston rod body 2, but also disperses the impact load to a certain extent and improves the strength of the entire head structure.

[0033] One end of the hexagonal reinforcing block 9 is fixed with a circular mounting plate 7. One end of the circular mounting plate 7 is detachably connected to a connector 3. The connector 3 is used to connect the piston rod body 2 and an external mechanical device, such as a hydraulic valve, and can transmit the movement of the piston rod body 2 to the external mechanical device to realize the opening and closing operation of the valve.

[0034] The piston rod body 2 has multiple external threads 5 on one side, and the reinforcing tube 12 has a threaded blind hole 6. The threaded blind hole 6 and the external threads 5 are screwed together and can be detachably connected to the connector 3 by the screw 8. This serves to connect the hexagonal reinforcing block 9 and the connector 3, so that the entire piston rod device can be easily connected and disassembled with external mechanical devices.

[0035] The hexagonal reinforcing block 9 is provided with a conical groove 11. The threaded blind hole 6 and the conical groove 11 are connected through each other. The conical end 4 is engaged in the conical groove 11. The conical structure can automatically center during installation, ensuring the accurate relative position between the piston rod body 2, the reinforcing tube 12 and the hexagonal reinforcing block 9, thus improving the installation accuracy of the entire device. The conical engagement method can also provide certain axial and radial constraints, enhancing the connection stability between the reinforcing tube 12, the hexagonal reinforcing block 9 and the piston rod body 2, making the entire head structure more robust.

[0036] The piston rod body 2 and the tapered end 4 are integrally formed. The integrally formed structure avoids the weak points that may be caused by welding or other connection methods, making the piston rod body 2 and the tapered end 4 a whole, with higher strength and reliability.

[0037] The circular mounting plate 7 has four mounting holes 10 spaced evenly around its circumference. Screws 8 are inserted through the mounting holes 10, with one end of the screws 8 extending into the connector 3. The piston rod body 2 is nitrided. Nitriding treatment can form a high-hardness nitrided layer on the surface of the piston rod body 2, increasing the surface hardness to HRC50 or higher. This effectively resists wear and scratches, extends the service life of the piston rod, and improves the corrosion resistance of the piston rod body 2, making it less prone to rust and corrosion in harsh working environments, thus ensuring the reliability and stability of the piston rod.

[0038] In this utility model

[0039] 1. Installation process

[0040] First, the reinforcing tube 12 is fitted onto the end of the piston rod body 2 with the external thread 5. Since the reinforcing tube 12 has a threaded blind hole 6, by rotating the reinforcing tube 12, the threaded blind hole 6 and the external thread 5 are screwed together, and the reinforcing tube 12 is firmly installed on the piston rod body 2. At this time, the tapered end 4 of one end of the piston rod body 2 will be inserted into the tapered groove 11 in the hexagonal reinforcing block 9. Since the threaded blind hole 6 and the tapered groove 11 are connected, this snap-fit ​​method further ensures the connection stability between the reinforcing tube 12, the hexagonal reinforcing block 9 and the piston rod body 2. Next, the screw 8 is passed through the four mounting holes 10 that are evenly distributed around the circumference of the circular mounting plate 7, and one end of the screw 8 is extended into the connector 3, so that the circular mounting plate 7 and the connector 3 are detachably connected together.

[0041] 2. Work Process

[0042] When the hydraulic cylinder body 1 is working, the pressure of the hydraulic oil pushes the piston rod body 2 to move linearly. The movement of the piston rod body 2 is transmitted to the connected mechanical device, such as the hydraulic valve, through the connecting piece 3, thereby realizing the opening and closing operation of the valve. In this process, when the valve opening and closing generates impact load, the conical end 4 structure of the piston rod body 2 head will disperse the impact load and avoid local stress concentration. At the same time, the reinforcing tube 12 and the hexagonal reinforcing block 9 will work together to further improve the strength and protection of the piston rod head, ensuring that the piston rod can work stably and reliably.

[0043] The piston rod body 2 is made of 42CrMo alloy steel, which has a high tensile strength of ≥1080MPa and a yield strength of ≥930MPa, providing a solid foundation for the piston rod. Surface nitriding treatment increases the surface hardness of the piston rod body 2 to HRC50 or higher, greatly enhancing its wear resistance and scratch resistance, reducing damage caused by friction and wear, and extending the service life of the piston rod. The tapered end 4 structure of the head can effectively disperse impact loads, avoid stress concentration, and reduce the risk of cracks caused by stress fatigue. The combination of the reinforcing tube 12 and the hexagonal reinforcing block 9 further improves the strength and protection of the head, enabling the piston rod to better cope with harsh working environments.

[0044] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. An integral piston rod with a head-reinforced structure, comprising a hydraulic cylinder body (1), characterized in that, The hydraulic cylinder body (1) is equipped with a piston rod body (2). One end of the piston rod body (2) is provided with a tapered end (4). One end of the piston rod body (2) is fitted with a reinforcing tube (12). One end of the reinforcing tube (12) is fixed with a hexagonal reinforcing block (9). One end of the piston rod body (2) is detachably installed in the reinforcing tube (12). The tapered end (4) is snapped into the hexagonal reinforcing block (9). One end of the hexagonal reinforcing block (9) is fixed with a circular mounting plate (7). One end of the circular mounting plate (7) is detachably connected with a connector (3).

2. The integral plug rod with a head reinforcement structure according to claim 1, characterized in that: The piston rod body (2) has multiple external threads (5) on one side, and the reinforcing tube (12) has a threaded blind hole (6) inside, and the threaded blind hole (6) and the external threads (5) are screwed together.

3. The integral plug rod with a head reinforcement structure according to claim 2, characterized in that: The hexagonal reinforcing block (9) is provided with a conical groove (11), the threaded blind hole (6) and the conical groove (11) are connected, and the conical end (4) is engaged in the conical groove (11).

4. The integral plug rod with a head reinforcement structure according to claim 1, characterized in that: The piston rod body (2) and the conical end (4) are integrally formed.

5. The integral plug rod with a head reinforcement structure according to claim 1, characterized in that: The circular mounting plate (7) has four mounting holes (10) spaced at equal intervals around its circumference. A screw (8) is inserted through the mounting hole (10), and one end of the screw (8) extends into the connector (3).

6. The integral plug rod with a head reinforcement structure according to claim 1, characterized in that: The surface of the piston rod body (2) is subjected to nitriding treatment.

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