Piston rod assembly

Abstract

The utility model discloses a piston rod assembly which comprises a rod body, a hydraulic pipe is arranged in the rod body, a first piston plate and a second piston plate are arranged below the rod body, and hydraulic cavities are formed in the first piston plate and the second piston plate. According to the piston rod assembly, the rod body, the hydraulic pipe, the first piston plate and the second piston plate are matched, the whole rod body is installed in the piston, when the piston is filled with hydraulic oil, the hydraulic oil can push the first piston plate and the second piston plate, and then the rod body can be pushed to extend outwards; when a first piston plate and a second piston plate are extruded by external hydraulic oil, due to the fact that the pressure intensity of the external hydraulic oil is larger than that of the internal hydraulic oil, the second piston plate moves towards the first piston plate firstly, and the first piston plate starts to move upwards slowly, so that a buffering effect is provided for a rod body; the problem that the piston rod does not serve as a buffering part is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of piston rods, in particular to a piston rod assembly. Background Art

[0002] The piston rod is a connecting component that supports the piston to do work. It is mostly used in oil cylinders and cylinder motion actuators. It is a moving component that moves frequently and has high technical requirements. The main function of the piston rod is to convert the reciprocating motion of the piston into linear motion or convert the linear motion into reciprocating motion, thereby transmitting the force acting on the piston and driving the piston to move. The piston rod can also be used to transmit torque and bear loads, so it can be used in various mechanical systems with linear reciprocating motion, such as oil cylinders, cylinders, hydraulics and pneumatics, engineering machinery, packaging machinery, woodworking machinery, conveying machinery, textile machinery, etc.

[0003] The hydraulic rod includes a piston structure. The hydraulic rod is a component that uses hydraulic pressure to transmit power to achieve mechanical transmission. It is usually composed of a piston, a rod, and a seal. The working principle of the hydraulic rod is to use the oil in the hydraulic system to form pressure on the piston, while pushing the piston to move, and transmitting the thrust to the object through the rod. The piston rod is one of the key components of the hydraulic rod. It is connected to the piston and realizes force transmission through the expansion and contraction of the piston rod. In engineering, hydraulic rods are often used as transmission parts in hydraulic cylinders, excavators, presses and other equipment. They can withstand very large push and pull forces and ensure high transmission accuracy and strong reliability.

[0004] The piston rod mainly pushes external objects through the thrust generated by the push of hydraulic oil. Therefore, when the strength of the material of the piston rod itself is low, repeated linear motion will cause the strength of the piston rod itself to further decrease, and may cause metal fatigue in severe cases. The reason is that the hydraulic oil itself is incompressible. When injecting hydraulic oil or reverse hydraulic oil, the piston rod itself has no component as a buffer. In order to solve this technical problem, the utility model proposes a piston rod assembly. Utility Model Content

[0005] The main purpose of the utility model is to provide a piston rod assembly, which can effectively solve the problems mentioned in the background technology.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A piston rod assembly comprises a rod body, wherein a hydraulic pipe is arranged inside the rod body, a first piston plate and a second piston plate are arranged below the rod body, and hydraulic chambers are arranged inside the first piston plate and the second piston plate.

[0008] Preferably, a reserved cavity is provided inside the rod body, the inner wall of the reserved cavity is fixedly mounted to the outer surface of the hydraulic pipe, a limiting plate is fixedly mounted on the inner wall of the hydraulic pipe, and a flow groove is provided on the inner side of the limiting plate.

[0009] Preferably, a fixing plate is fixedly mounted on the outer surface of the rod body, a storage bag is fixedly mounted on the outer surface of the fixing plate, and the hydraulic pipe extends to the interior of the storage bag.

[0010] Preferably, the inner wall of the first piston plate is fixedly mounted to the outer surface of the rod body, a sealing plate is fixedly mounted on the outer surface of the first piston plate, a reserved groove is opened on the inner side of the first piston plate, and a sealing ring is sleeved on the outer surface of the reserved groove.

[0011] Preferably, a buffer groove is opened on the inner side of the first piston plate, a buffer ring is slidably connected to the inner wall of the buffer groove, a transmission column is fixedly connected to the bottom surface of the buffer ring, and the lower end of the transmission column is fixedly mounted to the outer surface of the second piston plate.

[0012] Preferably, a limiting rod is fixedly installed on the outer surface of the second piston plate, a limiting groove is provided on the inner side of the first piston plate, a limiting ring is fixedly installed on the inner wall of the limiting groove, and the inner wall of the limiting ring is slidably connected to the outer surface of the limiting rod.

[0013] Preferably, a limiting block is fixedly mounted on the top end of the limiting rod, and the outer surface of the limiting block is slidably connected to the inner wall of the limiting groove.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] In the utility model, the entire rod body is installed in the piston through the cooperation between the rod body, the hydraulic pipe, the first piston plate and the second piston plate. When the piston is filled with hydraulic oil, the hydraulic oil can push the first piston plate and the second piston plate, and then push the rod body to extend outward. When the first piston plate and the second piston plate are squeezed by the external hydraulic oil, since the external hydraulic oil pressure is greater than the internal hydraulic oil, the second piston plate will first move toward the first piston plate, and the first piston plate also starts to move slowly upward, providing a buffering effect for the rod body, and solving the problem that the piston rod itself has no component as a buffer.

[0016] In the utility model, through the cooperation between the first piston plate, the transmission column and the buffer groove, the buffer ring and the second piston plate, a through hole is opened on the inner side of the first piston plate. When the piston reverses, the hydraulic oil above it enters the buffer groove through the through hole, pushing the buffer ring, so that the buffer ring can drive the second piston plate to move through the transmission column. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1This is a schematic diagram of the overall structure of a piston rod assembly of the utility model;

[0018] Figure 2 This is a schematic diagram of the rod explosion structure of a piston rod assembly of the utility model;

[0019] Figure 3 It is a schematic diagram of a top view of the internal cross section of a hydraulic pipe of a piston rod assembly of the utility model;

[0020] Figure 4 This is a schematic diagram of the internal structure of a first piston plate of a piston rod assembly of the utility model;

[0021] Figure 5 The utility model is a piston rod assembly Figure 4 Enlarged structural diagram.

[0022] In the figure: 1. rod body; 2. hydraulic pipe; 3. first piston plate; 4. second piston plate; 5. hydraulic chamber; 6. reserved chamber; 7. flow limiting plate; 8. flow groove; 9. fixed plate; 10. storage bag; 11. sealing plate; 12. reserved groove; 13. sealing ring; 14. buffer groove; 15. buffer ring; 16. transmission column; 17. limit rod; 18. limit groove; 19. limit ring; 20. limit block. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0024] like Figure 1-5 As shown, a piston rod assembly includes a rod body 1, a hydraulic pipe 2 is arranged inside the rod body 1, a first piston plate 3 and a second piston plate 4 are arranged below the rod body 1, a hydraulic cavity 5 is arranged inside the first piston plate 3 and the second piston plate 4, and the entire rod body 1 is installed in the piston. When the piston is filled with hydraulic oil, the hydraulic oil can push the first piston plate 3 and the second piston plate 4, and then push the rod body 1 to extend outward. When the first piston plate 3 and the second piston plate 4 are squeezed by the external hydraulic oil, since the external hydraulic oil pressure is greater than the internal hydraulic oil, the second piston plate 4 will first move toward the first piston plate 3, and the first piston plate 3 also starts to move slowly upward, providing a buffering effect for the rod body 1, and solving the problem that the piston rod itself has no buffering component.

[0025] A reserved cavity 6 is provided inside the rod body 1, and the inner wall of the reserved cavity 6 is fixedly mounted to the outer surface of the hydraulic pipe 2. A limiting plate 7 is fixedly mounted on the inner wall of the hydraulic pipe 2, and a flow groove 8 is provided on the inner side of the limiting plate 7. The reserved cavity 6 can be fixed to the hydraulic pipe 2, and the limiting plate 7 and the flow groove 8 can reduce the flow rate of the hydraulic oil in the hydraulic pipe 2.

[0026] A fixing plate 9 is fixedly mounted on the outer surface of the rod body 1, and a storage bag 10 is fixedly mounted on the outer surface of the fixing plate 9. The hydraulic pipe 2 extends to the inside of the storage bag 10. The fixing plate 9 can provide support for the storage bag 10. The storage bag 10 is made of polyurethane. It can show good elasticity and recovery ability, and can quickly push the hydraulic oil inside the storage bag 10 into the hydraulic cavity 5 when the hydraulic oil is reversely injected into the piston, so that the second piston plate 4 is away from the first piston plate 3.

[0027] The inner wall of the first piston plate 3 and the outer surface of the rod body 1 are fixedly installed, and a sealing plate 11 is fixedly installed on the outer surface of the first piston plate 3. A reserved groove 12 is opened on the inner side of the first piston plate 3, and a sealing ring 13 is sleeved on the outer surface of the reserved groove 12. The sealing plate 11 and the sealing ring 13 can prevent the hydraulic oil above the first piston plate 3 from entering the hydraulic chamber 5 when the piston is reversely thrust. The reserved groove 12 can provide a fixing function for the sealing ring 13 to prevent the sealing ring 13 from being misplaced.

[0028] A buffer groove 14 is provided on the inner side of the first piston plate 3, and a buffer ring 15 is slidably connected to the inner wall of the buffer groove 14. A transmission column 16 is fixedly connected to the bottom surface of the buffer ring 15. The lower end of the transmission column 16 is fixedly installed on the outer surface of the second piston plate 4. A through hole is provided on the inner side of the first piston plate 3. When the piston reverses, the hydraulic oil above it enters the buffer groove 14 through the through hole to push the buffer ring 15, so that the buffer ring 15 can drive the second piston plate 4 to move through the transmission column 16.

[0029] A limiting rod 17 is fixedly installed on the outer surface of the second piston plate 4, a limiting groove 18 is provided on the inner side of the first piston plate 3, a limiting ring 19 is fixedly installed on the inner wall of the limiting groove 18, and the inner wall of the limiting ring 19 is slidably connected to the outer surface of the limiting rod 17. The second piston plate 4 can move in the fixed direction given by the fiber ring through the limiting rod 17, thereby reducing the possibility of self-rotation of the second piston plate 4.

[0030] A limit block 20 is fixedly installed on the top of the limit rod 17. The outer surface of the limit block 20 is slidably connected to the inner wall of the limit groove 18. The limit block 20 can prevent the limit rod 17 from escaping from the limit groove 18. When the limit rod 17 reaches the lowest limit, the limit ring 19 can block the limit block 20.

[0031] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A piston rod assembly, characterized in that: The invention comprises a rod body (1), wherein a hydraulic pipe (2) is arranged inside the rod body (1), a first piston plate (3) and a second piston plate (4) are arranged below the rod body (1), and a hydraulic chamber (5) is arranged inside the first piston plate (3) and the second piston plate (4).

2. A piston rod assembly according to claim 1, characterized in that: A reserved cavity (6) is provided inside the rod body (1), the inner wall of the reserved cavity (6) is fixedly mounted to the outer surface of the hydraulic pipe (2), a flow limiting plate (7) is fixedly mounted on the inner wall of the hydraulic pipe (2), and a flow groove (8) is provided on the inner side of the flow limiting plate (7).

3. A piston rod assembly according to claim 2, characterized in that: A fixing plate (9) is fixedly mounted on the outer surface of the rod body (1), a storage bag (10) is fixedly mounted on the outer surface of the fixing plate (9), and the hydraulic pipe (2) extends to the interior of the storage bag (10).

4. A piston rod assembly according to claim 1, characterized in that: The inner wall of the first piston plate (3) and the outer surface of the rod body (1) are fixedly mounted, a sealing plate (11) is fixedly mounted on the outer surface of the first piston plate (3), a reserved groove (12) is provided on the inner side of the first piston plate (3), and a sealing ring (13) is sleeved on the outer surface of the reserved groove (12).

5. A piston rod assembly according to claim 4, characterized in that: A buffer groove (14) is provided on the inner side of the first piston plate (3), a buffer ring (15) is slidably connected to the inner wall of the buffer groove (14), a transmission column (16) is fixedly connected to the bottom surface of the buffer ring (15), and the lower end of the transmission column (16) is fixedly mounted on the outer surface of the second piston plate (4).

6. A piston rod assembly according to claim 5, characterized in that: A limiting rod (17) is fixedly mounted on the outer surface of the second piston plate (4), a limiting groove (18) is provided on the inner side of the first piston plate (3), a limiting ring (19) is fixedly mounted on the inner wall of the limiting groove (18), and the inner wall of the limiting ring (19) is slidably connected to the outer surface of the limiting rod (17).

7. A piston rod assembly according to claim 6, characterized in that: A limiting block (20) is fixedly mounted on the top end of the limiting rod (17), and the outer surface of the limiting block (20) is slidably connected to the inner wall of the limiting groove (18).

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