Self-lubricating hydraulic oil cylinder

Abstract

The utility model relates to the technical field of hydraulic oil cylinders, in particular to a self-lubricating hydraulic oil cylinder which comprises a cylinder barrel, a rear end cover is arranged at one end of the cylinder barrel, a front end cover is arranged at the other end of the cylinder barrel, a plug rod is movably installed between the cylinder barrel and the front end cover, and a piston is arranged at the end, located in the cylinder barrel, of the plug rod. An oil shell is fixedly connected to the outer side of the side, close to the front end cover, of the cylinder barrel. The movable disc, the spring and the oil groove are used in cooperation, when the piston moves to one side of the movable disc, the movable disc can be pushed, the spring on the other side is compressed after the movable disc is pushed, at the moment, the penetrating groove is opened, lubricating oil in the oil shell can flow into the annular groove in the outer wall of the piston, and when the piston retreats, the lubricating oil can flow into the annular groove. The spring can control the movable disc to reset and then block the penetrating groove, the piston evenly smears the lubricating oil in the annular groove on the inner wall of the rear end cover, and therefore the inner wall of the rear end cover and the outer wall of the piston can be conveniently lubricated.

Description

Technical Field

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

[0002] A hydraulic cylinder is a device that generates mechanical motion through liquid force transmission. It is widely used in various engineering and industrial fields. The hydraulic cylinder generates linear or rotary motion by applying liquid pressure in a closed container to perform various mechanical tasks.

[0003] Traditional lubrication methods cannot form a continuous and uniform lubrication film on moving parts, especially under high load, high speed or high temperature environment, which will lead to increased friction, increased wear and reduced life of mechanical parts. For this reason, we propose a self-lubricating hydraulic cylinder. Utility Model Content

[0004] The purpose of the utility model is to provide a self-lubricating hydraulic cylinder to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A self-lubricating hydraulic cylinder comprising

[0007] A cylinder, one end of which is provided with a rear end cover, the other end of which is provided with a front end cover, a plug rod is movably installed between the cylinder and the front end cover, and one end of the plug rod located inside the cylinder is provided with a piston;

[0008] An oil shell is fixedly connected to the outer side of one side of the cylinder barrel close to the front end cover, and a lubrication mechanism is arranged at one end of the front end cover located inside the cylinder barrel. The lubrication mechanism includes a movable plate, a spring and an oil groove.

[0009] Preferably, a spring is arranged at one end of the front end cover close to the inner part of the cylinder, a movable disk is arranged at the other end of the spring, and an oil groove is penetrated through the middle of the movable disk;

[0010] Preferably, a through groove is formed between the oil shell and both ends of the cylinder barrel, and the through groove and the oil groove are in the same straight line;

[0011] Preferably, a first oil inlet and outlet is provided at the top of the rear end cover, and a second oil inlet and outlet is provided at the top of the front end cover, and the first oil inlet and outlet and the second oil inlet and outlet are connected to the interior of the cylinder barrel;

[0012] Preferably, a sealing member is provided in the middle of the front end cover, and the plug rod is movably sleeved with the sealing member;

[0013] Preferably, a sealing ring is fixedly connected to the outer wall of the movable disk, and the sealing ring is slidably connected to the inner wall of the cylinder.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. This self-lubricating hydraulic cylinder is used in conjunction with a movable plate, a spring and an oil groove. When the piston moves to one side of the movable plate, it pushes the movable plate. After the movable plate is pushed, the spring on the other side is compressed. At this time, the groove is opened, and the lubricating oil inside the oil shell flows into the annular groove on the outer wall of the piston. When the piston retreats, the spring controls the movable plate to reset and seal the groove. The piston evenly applies the lubricating oil in the annular groove to the inner wall of the rear end cover, thereby facilitating lubrication of the inner wall of the rear end cover and the outer wall of the piston.

[0016] 2. In a self-lubricating hydraulic cylinder, when the piston moves toward the first oil inlet and outlet, the lubricating oil stored in the oil groove will be smeared on the outer wall of the plug rod until the oil groove in the middle of the movable disk is aligned with the through groove. At this time, the lubricating oil inside the oil shell passes through the through groove and enters the oil groove again. At the same time, the plug rod continues to move, and the lubricating oil entering the oil groove can also continue to lubricate the plug rod, so that the plug rod can be automatically lubricated. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall main structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the overall cross-sectional structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the sealing installation structure of the utility model;

[0020] Figure 4 This is a schematic diagram of the sealing ring installation structure of the utility model.

[0021] In the figure: 1. cylinder barrel; 2. rear end cover; 3. front end cover; 4. plug rod; 5. piston; 6. oil shell; 7. lubrication mechanism; 701. movable plate; 702. spring; 703. oil groove; 8. through groove; 9. first oil inlet and outlet; 10. second oil inlet and outlet; 11. sealing element; 12. sealing ring. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.

[0024] like Figure 1-4 As shown, a technical solution provided by the utility model:

[0025] A self-lubricating hydraulic cylinder comprises a cylinder barrel 1, a rear end cover 2 is arranged at one end of the cylinder barrel 1, a front end cover 3 is arranged at the other end of the cylinder barrel 1, a plug rod 4 is movably installed between the cylinder barrel 1 and the front end cover 3, and a piston 5 is arranged at the inner end of the plug rod 4 located in the cylinder barrel 1; an oil shell 6 is fixedly connected to the outer side of the cylinder barrel 1 near the front end cover 3, and a lubrication mechanism 7 is arranged at the inner end of the cylinder barrel 1, and the lubrication mechanism 7 comprises a movable disk 701, a spring 702 and an oil groove 703; a spring 702 is arranged at the inner end of the front end cover 3 near the cylinder barrel 1, and a movable disk 701 is arranged at the other end of the spring 702, and an oil groove 703 is penetrated in the middle of the movable disk 701; a first oil inlet and outlet port 9 is arranged at the top end of the rear end cover 2, and a second oil inlet and outlet port 10 is arranged at the top end of the front end cover 3, and the first oil inlet and outlet port 9 and the second oil inlet and outlet port 10 are connected with the interior of the cylinder barrel 1;

[0026] In this embodiment, when oil is supplied from the position of the second oil inlet and outlet 10, the plug rod 4 and the piston 5 retreat inside the cylinder 1. When the piston 5 moves to one side of the movable disk 701, it pushes the movable disk 701. After the movable disk 701 is pushed, it compresses the spring 702 on the other side. At this time, the groove 8 is opened, and the lubricating oil inside the oil shell 6 flows into the annular groove on the outer wall of the piston 5. When the piston 5 retreats, the spring 702 controls the movable disk 701 to reset and then seal the groove 8. The piston 5 evenly spreads the lubricating oil in the annular groove on the inner wall of the rear end cover 2, thereby facilitating lubrication of the inner wall of the rear end cover 2 and the outer wall of the piston 5.

[0027] like Figure 3 As shown, a through groove 8 is formed between the oil shell 6 and both ends of the cylinder 1, and the through groove 8 and the oil groove 703 are on the same straight line;

[0028] In this embodiment, when the piston 5 moves toward the first oil inlet and outlet 9, the lubricating oil stored in the oil groove 703 will be smeared on the outer wall of the plug rod 4 until the oil groove 703 in the middle of the movable disk 701 is aligned with the through groove 8. At this time, the lubricating oil inside the oil shell 6 passes through the through groove 8 and enters the oil groove 703 again. At the same time, the plug rod 4 continues to move, and the lubricating oil entering the oil groove 703 can also continue to lubricate the plug rod 4, so that automatic lubrication of the plug rod 4 can be achieved.

[0029] like Figure 3 As shown, a sealing member 11 is disposed in the middle of the front end cover 3, and the plug rod 4 is movably sleeved with the sealing member 11;

[0030] In this embodiment, when the piston 5 moves forward and backward, it can be sealed by the sealing member 11 in the middle of the front end cover 3 to prevent leakage of hydraulic oil.

[0031] like Figure 3 and Figure 4 As shown, a sealing ring 12 is fixedly connected to the outer wall of the movable disk 701, and the sealing ring 12 is slidably connected to the inner wall of the cylinder 1;

[0032] In this embodiment, the sealing ring 12 on the outer wall of the movable disk 701 is used to improve the sealing performance between the sealing ring 12 and the inner wall of the rear end cover 2 .

[0033] Working principle: When working, oil is supplied from the first oil inlet and outlet 9, and the hydraulic oil pressurizes the piston 5 to push the plug rod 4 to the other side. When oil is supplied from the second oil inlet and outlet 10, the plug rod 4 and the piston 5 retreat inside the cylinder 1. When the piston 5 moves to one side of the movable disk 701, it pushes the movable disk 701. After the movable disk 701 is pushed, it compresses the spring 702 on the other side. At this time, the groove 8 is opened, and the lubricating oil inside the oil shell 6 will flow into the annular groove on the outer wall of the piston 5. When the piston 5 retreats, the spring 702 will control the movable disk 701 to reset. The through groove 8 is blocked, and the piston 5 evenly applies the lubricating oil in the annular groove to the inner wall of the rear end cover 2; when the piston 5 moves toward the first oil inlet and outlet 9, the lubricating oil stored in the oil groove 703 will be applied to the outer wall of the plug rod 4 until the oil groove 703 in the middle of the movable disk 701 is aligned with the through groove 8. At this time, the lubricating oil inside the oil shell 6 passes through the through groove 8 and enters the oil groove 703 again. At the same time, the plug rod 4 continues to move, and the lubricating oil entering the oil groove 703 can also continue to lubricate the plug rod 4, so that the plug rod 4 can be automatically lubricated.

[0034] The above shows and describes the basic principle, main features and 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 preferred examples of the utility model and are not used to limit 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 of the utility model is defined by the attached claims and their equivalents.

Claims

1. A self-lubricating hydraulic cylinder, characterized in that: include A cylinder barrel (1), wherein a rear end cover (2) is disposed at one end of the cylinder barrel (1), a front end cover (3) is disposed at the other end of the cylinder barrel (1), a plug rod (4) is movably mounted between the cylinder barrel (1) and the front end cover (3), and a piston (5) is disposed at one end of the plug rod (4) located inside the cylinder barrel (1); An oil shell (6) is fixedly connected to the outer side of one side of the cylinder barrel (1) close to the front end cover (3), and a lubrication mechanism (7) is provided at one end of the front end cover (3) located inside the cylinder barrel (1). The lubrication mechanism (7) includes a movable disk (701), a spring (702) and an oil groove (703).

2. A self-lubricating hydraulic cylinder according to claim 1, characterized in that: A spring (702) is arranged at one end of the front end cover (3) close to the inner side of the cylinder barrel (1), and a movable disk (701) is arranged at the other end of the spring (702). An oil groove (703) is penetrated through the middle of the movable disk (701).

3. A self-lubricating hydraulic cylinder according to claim 1, characterized in that: A through groove (8) is formed between the oil shell (6) and both ends of the cylinder barrel (1), and the through groove (8) and the oil groove (703) are located on the same straight line.

4. A self-lubricating hydraulic cylinder according to claim 1, characterized in that: The top end of the rear end cover (2) is provided with a first oil inlet and outlet (9), the top end of the front end cover (3) is provided with a second oil inlet and outlet (10), and the first oil inlet and outlet (9) and the second oil inlet and outlet (10) are connected to the interior of the cylinder barrel (1).

5. The self-lubricating hydraulic cylinder according to claim 1, characterized in that: A sealing member (11) is provided in the middle of the front end cover (3), and the plug rod (4) is movably sleeved with the sealing member (11).

6. A self-lubricating hydraulic cylinder according to claim 2, characterized in that: A sealing ring (12) is fixedly connected to the outer wall of the movable disk (701), and the sealing ring (12) is slidably connected to the inner wall of the cylinder (1).

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