High-strength bucket arm oil cylinder for excavator

Abstract

The utility model provides a kind of high-strength bucket rod oil cylinder for excavator, it belongs to excavator bucket rod oil cylinder technical field, it includes cylinder body and first connecting ring, the one end of cylinder body is fixedly connected with first connecting ring, the inside of cylinder body is inlayed with piston, the one side of piston is fixedly connected with plug rod, the tail end of plug rod is fixedly connected with second connecting ring, the other end of cylinder body is bolted with cylinder cover.The utility model adds shock absorber and shock absorption layer to cylinder body, when the impact force of external environment is conducted to the outer surface of cylinder body, the telescopic component of shock absorber is preliminarily absorbed to impact force via friction force, shock absorption layer is made by filling with liquid epoxy resin, further absorption is carried out to impact force via the good damping property of liquid epoxy resin, and then the stability of cylinder body is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of excavator stick cylinders, and particularly relates to a high-strength stick cylinder for excavators. Background Technology

[0002] Excavators, as a type of modern and commonly used construction machinery, are mainly used to excavate the soil around construction sites and transport the excavated soil to the outer surface of an external bucket or platform for subsequent construction work. In the current operation of excavators, a boom cylinder is required to transmit the oblique pushing and pulling force to the inside of the excavator bucket, causing the excavator bucket to swing.

[0003] In the prior art, excavator stick cylinders, such as the one published in patent CN202418086U, belong to the category of hydraulic cylinders. The aim is to provide a hydraulic cylinder that operates smoothly and responds quickly. It includes a cylinder body, a piston rod located within the cylinder body via a piston, and an end cap that seals the cylinder body. A large buffer sleeve (6) is located between the piston (8) and the end cap (2) on the piston rod (1), and a large annular groove (15) with a bevel is provided on the piston rod (1), in which a large sealing ring (5) is located. A small buffer sleeve (10) is located between the piston (8) and the cylinder bottom (12) on the piston rod (1), and a small annular groove (13) with a bevel is provided on the piston rod (1), in which a small sealing ring (14) is located. This invention has the advantages of simple structure, fast response speed, reliable buffering performance, and small pulse impact; it is a hydraulic cylinder used for hydraulic excavator sticks.

[0004] Existing excavator boom cylinders lack shock-absorbing components, so when the impact force from the external environment is transmitted to the outer surface of the cylinder, it cannot absorb the impact force, causing deformation of the inner wall of the cylinder, which in turn affects the subsequent use of the hydraulic cylinder. Utility Model Content

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A high-strength boom cylinder for excavators includes a cylinder body and a first connecting ring. The first connecting ring is fixedly connected to one end of the cylinder body. A piston is fitted into the inner side of the cylinder body. A piston rod is fixedly connected to one side of the piston. A second connecting ring is fixedly connected to the tail end of the piston rod. A cylinder head is bolted to the other end of the cylinder body.

[0006] Preferably, an oil pipe is connected through the top of the cylinder, and a fixing plate is fixedly connected to the outer surface of the oil pipe. A threaded fixing hole is opened through the outer surface of the fixing plate.

[0007] Preferably, a shock absorber is arranged inside the inner wall of the cylinder.

[0008] Preferably, a damping layer is arranged inside the inner wall of the cylinder, and the damping layer is located on the outside of the damper.

[0009] Preferably, both sides of the cylinder are fixedly connected to a shielding shell, and the outer surface of the shielding shell is provided with an air exchange groove.

[0010] Preferably, the inner side of the shielding shell is fixedly connected with a connecting bolt, and three connecting bolts are provided, with active electrodes fixedly connected to the outer surfaces of the three connecting bolts.

[0011] Preferably, both sides of the active electrode are fixedly connected with connecting wires, and the tail end of the connecting wires extends to the outer surface of the cylinder.

[0012] Compared with the prior art, the present invention has the following advantages: This invention adds a shock absorber and a shock-absorbing layer. When the impact force from the external environment is transmitted to the outer surface of the cylinder, the telescopic component of the shock absorber initially absorbs the impact force through friction. The shock-absorbing layer is made of liquid epoxy resin, which further absorbs the impact force through the good damping properties of the liquid epoxy resin, thereby improving the stability of the cylinder.

[0013] This invention adds an active electrode and a connecting wire. The active electrode is made of a metal with a high activity series. When moisture from the external environment is conducted to the outer surface of the active electrode, the active electrode preferentially undergoes an oxidation reaction and transfers electrons to the interior of the connecting wire. At this time, the connecting wire transfers electrons to the outer surface of the cylinder body, thus slowing down the corrosion rate of the cylinder body. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a high-strength boom cylinder for excavators proposed in this utility model; Figure 2 This is a schematic diagram of the back structure of a high-strength boom cylinder for excavators proposed in this utility model; Figure 3 This is a cross-sectional view of the connecting part of the cylinder block proposed in this utility model; Figure 4 This is a cross-sectional view of the connecting part of the shielding shell proposed in this utility model; Figure 5 This is a schematic diagram of the connection part at point A proposed in this utility model.

[0015] In the diagram: 1. Cylinder block; 2. First connecting ring; 3. Piston; 4. Plug rod; 5. Second connecting ring; 6. Cylinder head; 7. Oil pipe; 8. Fixing plate; 9. Threaded fixing hole; 10. Shock absorber; 11. Shock-absorbing layer; 12. Shielding shell; 13. Air vent; 14. Connecting bolt; 15. Active electrode; 16. Connecting wire. Detailed Implementation

[0016] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0017] Reference Figures 1-3 and Figure 5 A high-strength boom cylinder for excavators includes a cylinder body 1 and a first connecting ring 2. The first connecting ring 2 is fixedly connected to one end of the cylinder body 1. The cylinder body 1 provides fixing points for the first connecting ring 2, piston 3, cylinder head 6, hydraulic pipe 7, shock absorber 10, shock-absorbing layer 11, shielding shell 12, and connecting wire 16 that connect its outer surface and internal components. The first connecting ring 2 is connected to an external hinge, completing the connection at one end of the cylinder body 1 while ensuring the mobility of the cylinder body 1. The piston 3 is fitted into the inner side of the cylinder body 1. Piston 3 is fitted into the inner side of cylinder 1. When hydraulic oil is supplied to the inside of cylinder 1, piston 3 moves, causing piston rod 4, which is fixedly connected to one side of piston 3, to move. Piston rod 4 moves under the drive of piston 3, causing second connecting ring 5, which is fixedly connected to its tail end, to move. Second connecting ring 5 is fixedly connected to the tail end of piston rod 4 and is connected to an external hinge, completing the connection at the other end of cylinder 1 and ensuring the mobility of cylinder 1. When pressure is transmitted to the inside of the piston rod 4, the piston rod 4 drives the second connecting ring 5 to move, causing the external bucket to swing. The other end of the cylinder body 1 is bolted to the cylinder head 6, which is threaded to the other side of the cylinder body 1, blocking the other side of the cylinder body 1. Through the external sealing gasket, it prevents oil from leaking into the external environment. The top of the cylinder body 1 is connected to the oil pipe 7, which is connected to the top of the cylinder body 1 and connected to the external pipeline, providing space for oil to be transported to the inside of the cylinder body 1 or for oil to be extracted from the inside of the cylinder body 1. The outer surface of the oil pipe 7 is fixedly connected to the fixing plate 8, which is fixedly connected to the outer surface of the oil pipe 7, and provides a fixing point for the threaded fixing hole 9 through the outer surface of the fixing plate 8. The outer surface of the fixing plate 8 is provided with the threaded fixing hole 9. When it is necessary to connect the oil pipe 7 to the external pipeline, the external bolt can be inserted into the threaded fixing hole 9 by external force, and the external bolt can be inserted into the external pipeline to complete the connection of the oil pipe 7.

[0018] Reference Figure 3 and Figure 5The inner wall of the cylinder 1 is equipped with a shock absorber 10, which is composed of metal sheets, springs and telescopic rods. When the impact force of the external environment is transmitted to the outer surface of the shock absorber 10, the shock absorber 10 undergoes elastic deformation and absorbs the impact force through friction, thereby improving the structural strength of the cylinder 1. The inner wall of the cylinder 1 is equipped with a damping layer 11, which is filled with liquid epoxy resin. When the impact force of the external environment is transmitted to the inside of the cylinder 1, the liquid epoxy resin further absorbs the impact force through its good damping properties. The damping layer 11 is located on the outside of the shock absorber 10.

[0019] Reference Figures 1-2 and Figure 4 Both sides of the cylinder body 1 are fixedly connected to a shielding shell 12. The shielding shell 12 is fixedly connected to both sides of the cylinder body 1, providing space for the ventilation groove 13 opened on its outer surface, providing fixing points for the connecting bolt 14 fixedly connected inside, and shielding the active electrode 15 fixedly connected inside. The ventilation groove 13 is opened through the outer surface of the shielding shell 12, providing space for the active electrode 15 to exchange with the external air. The connecting bolt 14 is fixedly connected to the inner side of the shielding shell 12, providing a shield for the active electrode 15 fixedly connected to its outer surface. The system provides fixed points, and three connecting bolts 14 are provided. Active electrodes 15 are fixedly connected to the outer surfaces of the three connecting bolts 14. The active electrodes 15 are made of metals with a high activity series. When the water vapor in the external environment comes into contact with the active electrodes 15, the active electrodes 15 undergo an oxidation reaction, which transmits electrons to the interior of the connecting wires 16. Connecting wires 16 are fixedly connected to both sides of the active electrodes 15. When electrons are transmitted to the interior of the connecting wires 16, the connecting wires 16 transmit electrons to the outer surface of the cylinder body 1, which replenishes the cylinder body 1 with electrons and slows down the corrosion rate of the cylinder body 1. The tail end of the connecting wires 16 extends to the outer surface of the cylinder body 1.

[0020] The functional principle of this utility model can be explained through the following operation: First, the first connecting ring 2 is connected to the external hinge by external force to complete the connection of one end of the cylinder body 1. Then, the second connecting ring 5 is connected to the external hinge to complete the connection of the other end of the cylinder body 1. When it is necessary to connect the oil pipe 7 to the external pipeline, the external bolt can be inserted into the threaded fixing hole 9 by external force and the external bolt can be inserted into the external pipeline to complete the connection of the oil pipe 7. When the oil is delivered to the inside of the cylinder body 1, the piston 3 inside the cylinder body 1 moves under pressure. At this time, the piston 3 moves the piston rod 4. At this time, the piston rod 4 moves the second connecting ring 5. The second connecting ring 5 moves the bucket to swing, thus completing the transmission of the external excavator bucket.

[0021] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A high-strength boom cylinder for excavators, comprising a cylinder body (1) and a first connecting ring (2), characterized in that, One end of the cylinder (1) is fixedly connected to a first connecting ring (2), a piston (3) is fitted into the inner side of the cylinder (1), a piston rod (4) is fixedly connected to one side of the piston (3), a second connecting ring (5) is fixedly connected to the tail end of the piston rod (4), and a cylinder head (6) is bolted to the other end of the cylinder (1).

2. A high-strength boom cylinder for excavators according to claim 1, characterized in that, The top of the cylinder (1) is connected to an oil pipe (7), and a fixing plate (8) is fixedly connected to the outer surface of the oil pipe (7). A threaded fixing hole (9) is opened through the outer surface of the fixing plate (8).

3. A high-strength boom cylinder for excavators according to claim 1, characterized in that, The cylinder (1) has a shock absorber (10) arranged inside its inner wall.

4. A high-strength boom cylinder for excavators according to claim 1, characterized in that, The inner wall of the cylinder (1) is provided with a damping layer (11), and the damping layer (11) is located on the outside of the damper (10).

5. A high-strength boom cylinder for excavators according to claim 1, characterized in that, Both sides of the cylinder (1) are fixedly connected to a shield shell (12), and an air exchange groove (13) is opened through the outer surface of the shield shell (12).

6. A high-strength boom cylinder for excavators according to claim 5, characterized in that, The inner side of the shielding shell (12) is fixedly connected with a connecting bolt (14), and three connecting bolts (14) are provided. The outer surfaces of the three connecting bolts (14) are fixedly connected with active electrodes (15).

7. A high-strength boom cylinder for excavators according to claim 6, characterized in that, Both sides of the active electrode (15) are fixedly connected with connecting wires (16), and the tail end of the connecting wires (16) extends to the outer surface of the cylinder (1).

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