Hydraulic drive type high-sealing hydraulic oil cylinder

Abstract

The utility model relates to the technical field of hydraulic oil cylinders, in particular to a hydraulic drive type high-sealing hydraulic oil cylinder which comprises a cylinder body, a piston and a piston rod, the piston is arranged in the cylinder body, and the space in the cylinder body is divided into a rod cavity and a rodless cavity by the piston. The cylinder body is provided with a first connector communicated with the rod cavity and a second connector communicated with the rodless cavity, a dynamic sealing mechanism is arranged on the piston and comprises a first sealing ring and a transmission assembly, a first containing groove is formed in the peripheral wall of the piston, the first sealing ring is arranged in the first containing groove, and the second sealing ring is arranged in the second containing groove. The receiving end of the transmission assembly is located on the bottom face of the piston, the output end of the transmission assembly is in transmission connection with the first sealing ring, and through the design of the first sealing ring and the transmission assembly, when oil enters the hydraulic oil cylinder, the first sealing ring can abut against the inner wall of the cylinder body through part of hydraulic pressure, so that the position of the first sealing ring is dynamic; and the inner wall of the cylinder body can be resisted in real time during use, so that the sealing performance is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic cylinders, in particular to a hydraulic-driven high-sealing hydraulic cylinder. Background Art

[0002] A hydraulic cylinder, also known as an oil cylinder, is a linear motion actuator that converts hydraulic energy into mechanical energy. The basic components of a hydraulic cylinder mainly include: cylinder block: the cylinder block is the main part of the hydraulic cylinder, which is used to accommodate hydraulic oil and the piston; piston and piston rod: the piston is a key component in the hydraulic cylinder, which separates both sides of the working chamber; the piston rod is connected to the piston and is used to transmit the force and motion generated by the hydraulic cylinder. In the existing technology, the piston in the hydraulic cylinder reciprocates in the cylinder block, which will cause the piston to repeatedly rub against the inner wall of the cylinder block. The piston is easily worn. After long-term use, the sealing performance of the piston decreases, which will affect the operation of the high-pressure hydraulic cylinder. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is: in order to overcome the problem that in the prior art, the piston reciprocates in the cylinder block, which will cause the piston to repeatedly rub against the inner wall of the cylinder block, the piston is easily worn, and after long-term use, the sealing performance of the piston decreases, which will affect the operation of the high-pressure hydraulic cylinder, a hydraulic-driven high-sealing hydraulic cylinder is provided.

[0004] The technical solution adopted by the utility model to solve its technical problem is: a hydraulic-driven high-sealing hydraulic cylinder, including a cylinder block, a piston and a piston rod. The piston is arranged in the cylinder block. One end of the piston rod is fixedly connected to the piston, and the other end passes through the cylinder block and extends to the outside of the cylinder block. The piston divides the space in the cylinder block into a rod chamber and a rodless chamber. The cylinder block is provided with a first connector communicating with the rod chamber and a second connector communicating with the rodless chamber. A dynamic sealing mechanism is arranged on the piston. The dynamic sealing mechanism includes a first sealing ring and a transmission component. A first accommodation groove for accommodating the first sealing ring is formed on the outer peripheral wall of the piston. The first sealing ring is partially located in the first accommodation groove. The receiving end of the transmission component is located on the bottom surface of the piston, and the output end of the transmission component is in transmission connection with the first sealing ring. The transmission component is used to transmit part of the hydraulic pressure to the first sealing ring, so that the first sealing ring abuts against the inner wall of the cylinder block. Through the design of the first sealing ring and the transmission component, when the hydraulic cylinder is filled with hydraulic fluid, part of the hydraulic pressure can be used to make the first sealing ring abut against the inner wall of the cylinder block, so that the position of the first sealing ring is dynamic and can abut against the inner wall of the cylinder block in real time during use, thereby increasing the sealing performance.

[0005] Further, an activity cavity is formed on the bottom surface of the piston, a docking cavity is formed in the piston, the docking cavity and the first accommodation groove are communicated through a first connection cavity, and the activity cavity and the docking cavity are communicated through a second connection cavity;

[0006] The transmission assembly includes a first transmission rod, a second transmission rod, and a receiving plate. The receiving plate is slidably arranged in the movable cavity. The head end of the first transmission rod abuts against the inner side of the first sealing ring. The first transmission rod matches the first connection cavity and is slidably connected to the first connection cavity. The tail end of the first transmission rod extends into the docking cavity. The second transmission rod matches the second connection cavity. The head end of the second transmission rod is drivingly connected to the first transmission rod, and the tail end of the second transmission rod is fixedly connected to the receiving plate.

[0007] Further, the first transmission rod is arranged horizontally, and the second transmission rod is arranged vertically.

[0008] Further, the tail end of the first transmission rod has a first docking surface arranged obliquely, and the head end of the second transmission rod has a second docking surface matching the first docking surface, and the first docking surface and the second docking surface are in contact.

[0009] Further, an elastic element is arranged in the rod cavity. The elastic element is sleeved on the piston rod. One end of the elastic element abuts against the cylinder block, and the other end abuts against the piston rod.

[0010] Further, a second accommodation groove is formed on the outer peripheral wall of the piston, and a second sealing ring is arranged in the second accommodation groove.

[0011] Further, a contact block is arranged on the head end of the second transmission rod.

[0012] The beneficial effects of the present utility model are as follows: A hydraulic drive type high-sealing hydraulic cylinder provided by the present utility model, through the design of the first sealing ring and the transmission assembly, can utilize part of the hydraulic pressure to make the first sealing ring abut against the inner wall of the cylinder block when the hydraulic cylinder is filled with hydraulic fluid, making the position of the first sealing ring dynamic, and can abut against the inner wall of the cylinder block in real time during use, increasing the sealing performance. Description of the Drawings

[0013] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0014] Figure 1 is a schematic structural diagram of the present utility model;

[0015] Figure 2 is the present utility model Figure 1 The enlarged structural diagram of part A in.

[0016] In the figure: 1. Cylinder block, 11. Rod chamber, 12. Rodless chamber, 13. First connector, 14. Second connector, 2. Piston, 21. First accommodation groove, 22. Activity chamber, 23. Docking chamber, 24. First connection chamber, 25. Second connection chamber, 26. Second accommodation groove, 27. Second sealing ring, 3. Piston rod, 4. Dynamic sealing mechanism, 41. First sealing ring, 42. Transmission assembly, 421. First transmission rod, 4211. First docking surface, 422. Second transmission rod, 4221. Second docking surface, 423. Bearing plate, 424. Abutting block, 5. Elastic element. Detailed implementation mode

[0017] Now, the present utility model will be further described in detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present utility model in a schematic manner, so they only show the components related to the present utility model.

[0018] As Figure 1 is a schematic structural diagram of the present utility model. A high-sealing hydraulic cylinder driven by hydraulic pressure includes a cylinder block 1, a piston 2, and a piston rod 3. The piston 2 is arranged inside the cylinder block 1. One end of the piston rod 3 is fixedly connected to the piston 2, and the other end passes through the cylinder block 1 and extends to the outside of the cylinder block 1. The piston 2 divides the space inside the cylinder block 1 into a rod chamber 11 and a rodless chamber 12. The cylinder block 1 is provided with a first connector 13 communicating with the rod chamber 11 and a second connector 14 communicating with the rodless chamber 12.

[0019] As Figure 1 、 Figure 2 shown, a dynamic sealing mechanism 4 is arranged on the piston 2. The dynamic sealing mechanism 4 includes a first sealing ring 41 and a transmission assembly 42. A first accommodation groove 21 for accommodating the first sealing ring 41 is formed on the outer peripheral wall of the piston 2. The first sealing ring 41 is partially located in the first accommodation groove 21. The receiving end of the transmission assembly 42 is located at the bottom surface of the piston 2, and the output end of the transmission assembly 42 is in transmission connection with the first sealing ring 41. The transmission assembly 42 is used to transmit part of the hydraulic pressure to the first sealing ring 41, so that the first sealing ring 41 abuts against the inner wall of the cylinder block 1. Through the design of the first sealing ring 41 and the transmission assembly 42, when the hydraulic cylinder is filled with hydraulic fluid, part of the hydraulic pressure can be used to make the first sealing ring abut against the inner wall of the cylinder block, making the position of the first sealing ring dynamic, and it can abut against the inner wall of the cylinder block in real time during use, increasing the sealing performance.

[0020] As Figure 2 shown, an activity chamber 22 is formed on the bottom surface of the piston 2, and a docking chamber 23 is formed inside the piston 2. The docking chamber 23 and the first accommodation groove 21 are communicated through a first connection chamber 24, and the activity chamber 22 and the docking chamber 23 are communicated through a second connection chamber 25;

[0021] As Figure 2As shown in the figure, the transmission assembly 42 includes a first transmission rod 421, a second transmission rod 422, and a receiving plate 423. The receiving plate 423 is slidably arranged in the movable cavity 22. The first section of the first transmission rod 421 abuts against the inner side of the first sealing ring 41. The first transmission rod 421 is arranged horizontally, and the second transmission rod 422 is arranged vertically. The first transmission rod 421 matches the first connection cavity 24 and is slidably connected to the first connection cavity 24. The tail end of the first transmission rod 421 extends into the docking cavity 23. The second transmission rod 422 matches the second connection cavity 25, and there are also multiple second connection cavities 25, with the second connection cavities 25 corresponding to the second transmission rods 422 one by one. The first end of the second transmission rod 422 is drivingly connected to the first transmission rod 421, and the tail end of the second transmission rod 422 is fixedly connected to the receiving plate 423.

[0022] Abutting blocks 424 are arranged on the first end of the second transmission rod 422.

[0023] Furthermore, the first transmission rods 421 and the second transmission rods 422 correspond one by one. There are multiple second transmission rods 422, and the abutting blocks 424 enclose an annular structure, causing the first sealing ring 41 to fit against the inner wall of the cylinder block 1.

[0024] Furthermore, the receiving plate 423 is in an annular structure, and the receiving plate 423 matches the movable cavity 422. And due to the limited area of the receiving plate 423, most of the pressure is still borne by the piston 2. Therefore, the first sealing ring 41 will not be overly pressed against the inner wall of the cylinder block 1.

[0025] The tail end of the first transmission rod 421 has a first docking surface 4211 arranged obliquely, and the first end of the second transmission rod 422 has a second docking surface 4221 that matches the first docking surface 4211. The first docking surface 4211 and the second docking surface 4221 are in contact. The first docking surface 4211 is inclined outward from top to bottom, causing the second transmission rod 422 to move radially outward, causing the abutting blocks 424 to abut against the first sealing ring 41.

[0026] An elastic element 5 is arranged in the rod chamber 11. The elastic element 5 is sleeved on the piston rod 3. One end of the elastic element 5 abuts against the cylinder block 1, and the other end abuts against the piston rod 3. The elastic element 5 is a spring, which can play a buffering role on the one hand and a rapid resetting role on the other hand.

[0027] A second accommodation groove 26 is formed on the outer peripheral wall of the piston 2, and a second sealing ring 27 is arranged in the second accommodation groove 26 to further enhance the sealing effect.

[0028] Working principle: When hydraulic oil enters the second connector 14, the hydraulic oil exerts pressure on the piston 2 and the bearing plate 423. The upward movement of the bearing plate 423 causes the first transmission rod 421 to drive the second transmission rod 422 to move radially outward, so that the abutting block 424 abuts against the first sealing ring 41.

[0029] Enlightened by the above ideal embodiments of the present invention, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A hydraulically driven high-sealing hydraulic cylinder, comprising a cylinder block (1), a piston (2) and a piston rod (3), wherein the piston (2) is arranged inside the cylinder block (1), one end of the piston rod (3) is fixedly connected to the piston (2), and the other end passes through the cylinder block (1) and extends to the outside of the cylinder block (1). The piston (2) divides the space inside the cylinder block (1) into a rod chamber (11) and a rodless chamber (12). The cylinder block (1) is provided with a first connector (13) communicating with the rod chamber (11) and a second connector (14) communicating with the rodless chamber (12), characterized in that, A dynamic sealing mechanism (4) is arranged on the piston (2). The dynamic sealing mechanism (4) includes a first sealing ring (41) and a transmission component (42). A first accommodation groove (21) for accommodating the first sealing ring (41) is formed on the outer peripheral wall of the piston (2). The first sealing ring (41) is located in the first accommodation groove (21). The receiving end of the transmission component (42) is located on the bottom surface of the piston (2). The output end of the transmission component (42) is in transmission connection with the first sealing ring (41). The transmission component (42) is used to transfer part of the hydraulic pressure to the first sealing ring (41), so that the first sealing ring (41) abuts against the inner wall of the cylinder block (1).

2. The hydraulic drive type high-sealing hydraulic cylinder according to claim 1, characterized in that: An activity cavity (22) is formed on the bottom surface of the piston (2). A docking cavity (23) is formed in the piston (2). The docking cavity (23) and the first accommodation groove (21) are communicated through a first connection cavity (24). The activity cavity (22) and the docking cavity (23) are communicated through a second connection cavity (25). The transmission component (42) includes a first transmission rod (421), a second transmission rod (422) and a receiving plate (423). The receiving plate (423) is slidably arranged in the activity cavity (22). The head end of the first transmission rod (421) abuts against the inner side of the first sealing ring (41). The first transmission rod (421) matches the first connection cavity (24). The first transmission rod (421) is slidably connected with the first connection cavity (24). The tail end of the first transmission rod (421) extends into the docking cavity (23). The second transmission rod (422) matches the second connection cavity (25). The head end of the second transmission rod (422) is in transmission connection with the first transmission rod (421). The tail end of the second transmission rod (422) is fixedly connected with the receiving plate (423).

3. The hydraulic drive type high-sealing hydraulic cylinder according to claim 2, characterized in that: The first transmission rod (421) is arranged horizontally, and the second transmission rod (422) is arranged vertically.

4. The hydraulic drive type high-sealing hydraulic cylinder according to claim 2, characterized in that: The tail end of the first transmission rod (421) has a first docking surface (4211) arranged obliquely. The head end of the second transmission rod (422) has a second docking surface (4221) matching the first docking surface (4211). The first docking surface (4211) and the second docking surface (4221) are in contact.

5. A hydraulic drive type high-sealing hydraulic cylinder according to claim 1, characterized in that: An elastic element (5) is arranged in the rod chamber (11). The elastic element (5) is sleeved on the piston rod (3). One end of the elastic element (5) abuts against the cylinder block (1), and the other end abuts against the piston rod (3).

6. The hydraulic drive type high-sealing hydraulic cylinder according to claim 1, characterized in that: A second accommodation groove (26) is formed on the outer peripheral wall of the piston (2). A second sealing ring (27) is arranged in the second accommodation groove (26).

7. The hydraulic drive type high-sealing hydraulic cylinder according to claim 2, wherein: A butting block (424) is arranged on the head end of the second transmission rod (422).

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