Buffering and flow limiting hydraulic oil cylinder

Abstract

The utility model provides a buffering and flow-limiting hydraulic oil cylinder which comprises a cylinder body and a piston, buffering mechanisms are arranged between the inner walls of the two ends of the cylinder body and the piston, each buffering mechanism comprises a buffering ring and a damping rod, a conical hole is formed in each buffering ring, and flow-limiting mechanisms are symmetrically arranged at the bottoms of the two ends of the cylinder body. When the piston and the piston rod move, a damping rod can be driven, so that the damping rod can be inserted into the conical hole, the piston is conveniently buffered through the damping effect of the damping rod and a buffer ring, meanwhile, oil in the conical hole is discharged through an oil discharging hole, and the piston can also be buffered; the two ends of the cylinder body are buffered in the operation process of the hydraulic oil cylinder, cylinder body damage caused by too high movement speed of the piston rod and the piston is prevented, the service life of the hydraulic oil cylinder can be prolonged, and practicability is high.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, specifically to a buffered and flow-limiting hydraulic cylinder. Background Technology

[0002] A hydraulic cylinder is an energy conversion device that converts hydraulic energy into mechanical energy and is the actuator in a hydraulic transmission system.

[0003] A hydraulic cylinder with buffering and flow-limiting capability, disclosed in announcement number CN217539172U, includes a cylinder body with an internal cylinder cavity. A piston rod with a piston head is mounted on the piston rod. The piston rod is movably connected to the cylinder cavity via the piston head. Oil filling pipes are fixedly connected to both sides of the cylinder body and extend through it. A flow-limiting structure, including a flow-limiting pipe with an inlet and outlet pipe on each side, is incorporated. A shock-absorbing structure, with shock-absorbing blocks and springs, dampens the piston rod, preventing excessive piston rod movement and cylinder body damage, thus extending the hydraulic cylinder's lifespan. However, this design only buffers the retraction of the piston rod and piston head, not the movement of the piston head and piston rod, reducing the practicality of this solution.

[0004] Therefore, this utility model provides a hydraulic cylinder with buffer and flow limiting. Utility Model Content

[0005] To address the shortcomings of existing technologies, the purpose of this invention is to provide a buffered and flow-limiting hydraulic cylinder to solve the problems mentioned in the background section. This invention, through the cooperation of a damping rod, buffer ring, tapered hole, and drain hole, can buffer both ends of the cylinder body during operation, preventing excessive speed of the piston rod and piston movement that could lead to cylinder body damage. This improves the lifespan of the hydraulic cylinder and makes it highly practical.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: a buffered flow-limiting hydraulic cylinder, comprising a cylinder body and a piston, wherein a buffer mechanism is provided between the inner walls of both ends of the cylinder body and the piston, the buffer mechanism comprising a buffer ring and a damping rod, wherein a tapered hole is provided inside the buffer ring, and a flow-limiting mechanism is symmetrically provided at the bottom of both ends of the cylinder body, wherein the flow-limiting mechanism comprises a fixed tube, the fixed tube being symmetrically fixedly provided at the bottom of both ends of the cylinder body, wherein an adjusting plate is movably provided on the inner side of the fixed tube via an electric push rod, and an oil inlet is provided between the fixed tube and the cylinder body.

[0007] Furthermore, the piston is slidably disposed inside the cylinder body, and a piston rod is fixedly disposed at the center position of one end of the piston, while one end of the piston rod is slidably disposed outside the cylinder body.

[0008] Furthermore, a first mounting ring is fixedly provided at the outer end of the piston rod, and a second mounting ring is fixedly provided at the other end of the cylinder.

[0009] Furthermore, the damping rod is symmetrically and fixedly mounted on both end faces of the piston in a circular shape, and the shape of the damping rod is conical.

[0010] Furthermore, the buffer rings are symmetrically fixed at both ends inside the cylinder body, and oil drain holes are provided on the inner wall of the tapered hole.

[0011] Furthermore, the electric push rod is fixedly mounted on the outer wall of the fixed tube, and one end of the adjusting plate is fixedly connected to the output end of the electric push rod.

[0012] Furthermore, the surface of the adjusting plate is fixedly disposed on the rubber layer, and the adjusting plate is blocked at the bottom of the oil inlet.

[0013] Furthermore, an oil pressure sensor is fixedly installed inside the fixed tube below the adjusting plate, and an inlet / outlet pipe is fixedly installed at the bottom of the fixed tube.

[0014] The beneficial effects of this utility model are as follows: When the piston and piston rod of the buffered flow-limiting hydraulic cylinder of this utility model move, they can drive a damping rod, allowing the damping rod to insert into the conical hole. The damping action of the damping rod and the buffer ring facilitates buffering of the piston. Simultaneously, the oil inside the conical hole is discharged through the drain hole, which also buffers the piston. This ensures that both ends of the cylinder body are buffered during operation, preventing excessive piston rod and piston movement speed from causing cylinder body damage and improving the lifespan of the hydraulic cylinder. Furthermore, the oil pressure sensor detects the oil pressure inside the fixed pipe, and the adjusting plate is adjusted via an electric push rod, facilitating the sealing and flow restriction of the cylinder body and oil inlet, preventing oil from impacting and damaging external pipelines. This design is highly practical. Attached Figure Description

[0015] Figure 1 This is a structural diagram of a buffered and flow-limiting hydraulic cylinder according to the present invention;

[0016] Figure 2 This is a front cross-sectional view of a hydraulic cylinder for buffering and limiting current according to this utility model;

[0017] Figure 3 This utility model relates to a buffered and current-limiting hydraulic cylinder. Figure 2 Enlarged view of point A in the middle;

[0018] Figure 4 This is a structural diagram of a buffer ring for a hydraulic cylinder with buffer and current limiting according to this utility model;

[0019] In the diagram: 1. Cylinder block; 2. Piston rod; 3. First mounting ring; 4. Second mounting ring; 5. Flow limiting mechanism; 6. Inlet and outlet pipes; 7. Piston; 8. Damping rod; 9. Buffer ring; 10. Fixed pipe; 11. Oil inlet; 12. Adjusting plate; 13. Electric push rod; 14. Oil pressure sensor; 15. Conical hole; 16. Oil drain hole. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0021] Please see Figures 1 to 4 This utility model provides a technical solution: a hydraulic cylinder with buffer and flow limiting, including a cylinder body 1 and a piston 7. A buffer mechanism is provided between the inner wall of both ends of the cylinder body 1 and the piston 7. The buffer mechanism includes a buffer ring 9 and a damping rod 8. A tapered hole 15 is opened inside the buffer ring 9. A flow limiting mechanism 5 is symmetrically arranged at the bottom of both ends of the cylinder body 1. The flow limiting mechanism 5 includes a fixed tube 10. The fixed tube 10 is symmetrically fixed at the bottom of both ends of the cylinder body 1. An adjusting plate 12 is movably arranged inside the fixed tube 10 through an electric push rod 13. An oil inlet 11 is opened between the fixed tube 10 and the cylinder body 1. Through the action of the damping rod 8 and the buffer ring 9, the movement of the piston 7 can be buffered to prevent impact on both ends of the cylinder body 1, thereby improving the service life of the hydraulic cylinder and making it highly practical.

[0022] In this embodiment, the piston 7 is slidably disposed inside the cylinder body 1. A piston rod 2 is fixedly disposed at the center of one end of the piston 7. One end of the piston rod 2 is slidably disposed on the outside of the cylinder body 1. A first mounting ring 3 is fixedly disposed at the outer end of the piston rod 2. A second mounting ring 4 is fixedly disposed at the other end of the cylinder body 1. The first mounting ring 3 and the second mounting ring 4 facilitate the installation of the hydraulic cylinder.

[0023] In this embodiment, the damping rod 8 is symmetrically and fixedly arranged on both end faces of the piston 7 in a circular shape. The damping rod 8 is conical in shape. The buffer ring 9 is symmetrically and fixedly arranged on both ends inside the cylinder body 1. The inner wall of the conical hole 15 is provided with an oil drain hole 16. When the piston 7 moves, it can drive the damping rod 8 and insert the damping rod 8 into the corresponding conical hole 15, which facilitates buffering of the piston 7. At the same time, the damping rod 8 can drain the oil inside the conical hole 15, which can also buffer the piston 7, thus improving the service life of the hydraulic cylinder.

[0024] In this embodiment, the electric push rod 13 is fixedly mounted on the outer wall of the fixed tube 10. One end of the adjusting plate 12 is fixedly connected to the output end of the electric push rod 13. The surface of the adjusting plate 12 is fixedly mounted on a rubber layer. The adjusting plate 12 is positioned at the bottom of the oil inlet 11. An oil pressure sensor 14 is fixedly mounted below the adjusting plate 12 corresponding to the inside of the fixed tube 10. An inlet / outlet pipe 6 is fixedly mounted at the bottom of the fixed tube 10. The oil pressure sensor 14 can detect the oil pressure inside the fixed tube 10, thereby controlling the electric push rod 13 to move the adjusting plate 12. This facilitates the sealing of the oil inlet 11 by the adjusting plate 12, preventing excessive oil pressure from impacting and damaging the external pipeline.

[0025] When using this buffered and flow-limiting hydraulic cylinder, both the inlet and outlet pipes 6 are fixedly connected to external pipes. Hydraulic rods are fed into the fixed pipe 10 and the cylinder body 1 through the external pipes and the inlet and outlet pipes 6. Hydraulic oil pushes the piston 7 to move inside the cylinder body 1. When the piston 7 approaches both ends of the cylinder body 1, it inserts the damping rod 8 into the corresponding conical hole 15. Through the damping effect of the damping rod 8 and the conical hole 15, the piston 7 is buffered. Simultaneously, the damping rod 8 discharges the oil inside the conical hole 15 through the drain hole 16. Because the drain hole 16 is small, it can also effectively dampen the flow. The piston 7 provides cushioning, facilitating buffering at both ends of the cylinder body during operation. This prevents excessively fast movement of the piston rod 2 and piston 7, which could damage the cylinder body 1 and extend its lifespan. When hydraulic oil flows inside the fixed pipe 10, the oil pressure sensor 14 detects the internal oil pressure and adjusts the regulating plate 12 via the electric push rod 13. This facilitates the sealing and flow restriction of the cylinder body 1 and the oil inlet 11, preventing oil from impacting and damaging external pipelines. The oil pressure sensor is model EB100AH.

[0026] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A buffered and flow-limiting hydraulic cylinder, comprising a cylinder body (1) and a piston (7), characterized in that, A buffer mechanism is provided between the inner walls of both ends of the cylinder (1) and the piston (7). The buffer mechanism includes a buffer ring (9) and a damping rod (8). A tapered hole (15) is provided inside the buffer ring (9). A flow limiting mechanism (5) is symmetrically provided at the bottom of both ends of the cylinder (1). The flow limiting mechanism (5) includes a fixed tube (10). The fixed tube (10) is symmetrically fixed at the bottom of both ends of the cylinder (1). An adjusting plate (12) is movably provided on the inner side of the fixed tube (10) through an electric push rod (13). An oil inlet (11) is provided between the fixed tube (10) and the cylinder (1).

2. The hydraulic cylinder with buffer and current limiting according to claim 1, characterized in that: The piston (7) is slidably disposed inside the cylinder (1), and a piston rod (2) is fixedly disposed at the center of one end of the piston (7), and one end of the piston rod (2) is slidably disposed on the outside of the cylinder (1).

3. A buffered and flow-limiting hydraulic cylinder according to claim 2, characterized in that: The piston rod (2) is fixedly provided with a first mounting ring (3) at its outer end, and the cylinder (1) is fixedly provided with a second mounting ring (4) at its other end.

4. A buffered and flow-limiting hydraulic cylinder according to claim 1, characterized in that: The damping rod (8) is symmetrically and fixedly arranged on both ends of the piston (7), and the shape of the damping rod (8) is conical.

5. A buffered and current-limiting hydraulic cylinder according to claim 4, characterized in that: The buffer ring (9) is symmetrically fixed at both ends inside the cylinder body (1), and an oil drain hole (16) is provided on the inner wall of the tapered hole (15).

6. A buffered and current-limiting hydraulic cylinder according to claim 1, characterized in that: The electric push rod (13) is fixedly mounted on the outer wall of the fixed tube (10), and one end of the adjusting plate (12) is fixedly connected to the output end of the electric push rod (13).

7. A buffered and flow-limiting hydraulic cylinder according to claim 6, characterized in that: The surface of the adjusting plate (12) is fixedly disposed on the rubber layer, and the adjusting plate (12) is blocked at the bottom of the oil inlet (11).

8. A buffered and flow-limiting hydraulic cylinder according to claim 7, characterized in that: An oil pressure sensor (14) is fixedly installed inside the fixed tube (10) below the adjusting plate (12), and an inlet / outlet tube (6) is fixedly installed at the bottom of the fixed tube (10).

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