Hydraulic oil cylinder with self-lubricating function

Abstract

The hydraulic oil cylinder comprises an oil cylinder base, an oil cylinder sleeve, an oil cylinder end cover and a lubricating sleeve, the oil cylinder sleeve is detachably connected to the oil cylinder base, the lubricating sleeve is fixedly connected to one end of the oil cylinder sleeve, and the oil cylinder end cover is detachably connected to one end of the lubricating sleeve and forms a closed structure with the oil cylinder base and the oil cylinder sleeve. The hydraulic cylinder has the advantages that the first liquid inlet connector and the second liquid inlet connector are inflated alternately, so that the piston is pushed to move, displacement driving of the telescopic rod is achieved, the first liquid inlet connector can push the baffle to turn over when hydraulic oil is injected, the baffle pushes the first sliding plug to move, and when the first sliding plug moves towards the telescopic rod, airflow is inflated, and the telescopic rod is driven to move. The air flow pushes the second piston to move, lubricating oil in the supply pipe is injected into the lubricating sleeve through the outlet one-way valve, the telescopic rod is lubricated through the lubricating sleeve, and when injection of hydraulic oil is stopped, the spring pushes the first sliding plug to move towards the end away from the telescopic rod, and air is supplemented through the inlet one-way valve.

Description

Technical Field

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

[0002] A hydraulic cylinder is an actuator in a hydraulic transmission system. It is an energy conversion device that converts hydraulic energy into mechanical energy. While a hydraulic motor achieves continuous rotary motion, a hydraulic cylinder achieves reciprocating motion. Hydraulic cylinders come in three main structural types: piston cylinders, plunger cylinders, and swing cylinders. Piston cylinders and plunger cylinders achieve reciprocating linear motion, outputting speed and thrust. Hydraulic cylinders can be used individually or in combination with two or more or in conjunction with other mechanisms to accomplish specialized functions.

[0003] At present, when the existing hydraulic cylinder is in use, the telescopic rod will cause wear and tear on the cylinder end cover during the long extension and contraction process, resulting in damage to the hydraulic cylinder. The worn hydraulic cylinder is easily penetrated by magazines, affecting the accuracy of the cylinder extension and contraction. To this end, we have made improvements and proposed a self-lubricating hydraulic cylinder. Utility Model Content

[0004] (1) Technical issues to be solved

[0005] In order to solve the above problems in the prior art, the utility model provides a self-lubricating hydraulic cylinder to solve the problem that the traditional cylinder is easily worn out after long-term use.

[0006] (2) Technical solution

[0007] In order to achieve the above-mentioned purpose, the main technical solutions adopted by this utility model are:

[0008] A self-lubricating hydraulic cylinder comprises a cylinder base, a cylinder sleeve, a cylinder end cover and a lubricating sleeve, wherein the cylinder sleeve is detachably connected to the cylinder base, the lubricating sleeve is fixedly connected to one end of the cylinder sleeve, and the cylinder end cover is detachably connected to one end of the lubricating sleeve to form a closed structure with the cylinder base and the cylinder sleeve, and further comprises:

[0009] The piston is slidably mounted on the inner wall of the cylinder sleeve and is slidably matched with the cylinder sleeve;

[0010] The telescopic rod is fixedly mounted on one side of the piston and is in sliding cooperation with the end cover of the oil cylinder;

[0011] A lubrication assembly, connected between the oil cylinder base and the lubrication sleeve, is used to lubricate the telescopic rod;

[0012] Liquid inlet connector 1, connected to the lubrication assembly and communicated with the oil cylinder base;

[0013] The second liquid inlet joint is connected to the outer wall of the lubricating sleeve and extends to the inner wall of the lubricating sleeve to be communicated with the oil cylinder sleeve.

[0014] The side walls of the cylinder sleeve and the cylinder end cover are provided with through holes, the side walls of the cylinder base and the lubricating sleeve are provided with threaded holes, and the cylinder base and the cylinder sleeve, as well as the lubricating sleeve and the cylinder end cover are detachably connected by bolts.

[0015] The inner wall of the oil cylinder end cover is threadedly connected with a guide sleeve, the inner wall of the oil cylinder end cover is also covered with a sealing ring near the inner side, and the inner wall of the oil cylinder end cover is also covered with a dustproof rubber sleeve near the outer side.

[0016] The side of the oil cylinder sleeve close to the lubricating sleeve extends inward to form a limiting protrusion, and the piston is in a restricted state when it moves to the position of the limiting protrusion.

[0017] The lubrication assembly includes an L-shaped adapter fixedly connected to the cylinder base, a sliding plug 1 is slidably installed on the inner side wall of the L-shaped adapter, and a return spring is fixedly installed between the sliding plug 1 and the L-shaped adapter. The lubrication assembly also includes a supply pipe fixedly connected to the side wall of the L-shaped adapter, an inlet check valve and an outlet check valve are detachably connected to the supply pipe, one end of the supply pipe is connected to the lubrication sleeve, a sliding plug 2 is slidably connected to the inner side wall of the supply pipe, and lubricating oil is injected into the supply pipe.

[0018] The inner top wall of the L-shaped adapter is also rotatably connected to a baffle, and when the baffle rotates relative to the L-shaped adapter, it can push the sliding plug to slide.

[0019] (3) Beneficial effects

[0020] The beneficial effects of the utility model are as follows: through the arrangement of the cylinder sleeve, the lubricating sleeve, the piston, the telescopic rod, the lubricating assembly, the liquid inlet joint 1 and the liquid inlet joint 2, the liquid inlet joint 1 and the liquid inlet joint 2 are alternately inflated, thereby pushing the piston to move, realizing the displacement drive of the telescopic rod; the liquid inlet joint 1 can also push the baffle to flip when injecting hydraulic oil, and the baffle pushes the sliding plug 1 to move; when the sliding plug 1 moves toward the direction of the telescopic rod, air flow is filled in, and the air flow pushes the piston 2 to move, and the lubricating oil in the supply pipe is injected into the lubricating sleeve through the outlet one-way valve, and the telescopic rod is lubricated by the lubricating sleeve; when the injection of hydraulic oil stops, the spring pushes the sliding plug 1 to move toward the end away from the telescopic rod, and gas is replenished through the inlet one-way valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the three-dimensional structure of the utility model;

[0023] Figure 3 This is a schematic diagram of the cutaway structure of the utility model;

[0024] Figure 4 This is a schematic diagram of the cross-sectional structure of the utility model;

[0025] Figure 5 For this utility model Figure 4 Enlarged view of point A in the middle.

[0026] [Description of Reference Numerals]

[0027] 1. Cylinder base; 2. Cylinder casing; 21. Limiting protrusion; 3. Cylinder end cover; 31. Guide sleeve; 32. Sealing ring; 33. Dustproof rubber sleeve; 4. Lubricating sleeve; 5. Piston; 6. Telescopic rod; 7. Lubrication assembly; 71. L-shaped adapter; 72. Slide plug 1; 73. Return spring; 74. Supply pipe; 75. Inlet check valve; 76. Outlet check valve; 77. Slide plug 2; 78. Baffle; 8. Liquid inlet connector 1; 9. Liquid inlet connector 2. DETAILED DESCRIPTION

[0028] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation methods in conjunction with the accompanying drawings.

[0029] Please refer to Figures 1 to 5 As shown, the utility model has a self-lubricating hydraulic cylinder, including a cylinder base 1, a cylinder sleeve 2, a cylinder end cover 3 and a lubricating sleeve 4, the cylinder sleeve 2 is detachably connected to the cylinder base 1, the lubricating sleeve 4 is fixedly connected to one end of the cylinder sleeve 2, the cylinder end cover 3 is detachably connected to one end of the lubricating sleeve 4 to form a closed structure with the cylinder base 1 and the cylinder sleeve 2, and also includes:

[0030] The piston 5 is slidably mounted on the inner wall of the cylinder sleeve 2 and is in sliding cooperation with the cylinder sleeve 2;

[0031] The telescopic rod 6 is fixedly mounted on one side of the piston 5 and is in sliding engagement with the cylinder end cover 3;

[0032] A lubrication assembly 7 is connected between the oil cylinder base 1 and the lubrication sleeve 4 and is used to lubricate the telescopic rod 6;

[0033] Liquid inlet connector 1 8, connected to the lubrication assembly 7 and communicated with the cylinder base 1;

[0034] Liquid inlet connector 2 (9) is connected to the outer wall of lubricating sleeve 4 and extends to the inner wall of lubricating sleeve 4 to communicate with cylinder sleeve 2. In actual implementation, liquid inlet connector 1 (8) and liquid inlet connector 2 (9) are located on either side of piston 5. Replenishing hydraulic oil through either connector pushes piston 5 in the other direction, thereby driving the movement of telescopic rod 6 and achieving control. During the extension and retraction process of telescopic rod 6, lubricating oil can also be replenished through the lubrication assembly to lubricate telescopic rod 6, thereby reducing surface friction of telescopic rod 6, facilitating long-term extension and retraction of telescopic rod 6, and extending the service life of the entire hydraulic cylinder.

[0035] Optionally, through-holes are formed in the side walls of the cylinder sleeve 2 and the cylinder end cover 3, and threaded holes are formed in the side walls of the cylinder base 1 and the lubricating sleeve 4. The cylinder base 1 and the cylinder sleeve 2, as well as the lubricating sleeve 4 and the cylinder end cover 3, are detachably connected by bolts. In actual implementation, the entire assembly of the hydraulic cylinder is completed by inserting the bolts into the cylinder sleeve 2 and the cylinder end cover 3 and then threading and securing them with the cylinder base 1 and the lubricating sleeve 4. The cylinder base 1, cylinder sleeve 2, cylinder end cover 3, and lubricating sleeve 4 can also be disassembled for maintenance.

[0036] Optionally, a guide sleeve 31 is threadedly connected to the inner wall of the cylinder end cap 3. A sealing ring 32 is also mounted on the inner wall of the cylinder end cap 3 near the inner side, and a dustproof rubber sleeve 33 is also mounted on the inner wall of the cylinder end cap 3 near the outer side. In actual implementation, the sealing ring 32 prevents hydraulic oil from overflowing during injection, and the dustproof rubber sleeve 33 cleans the telescopic rod 6, preventing debris from being introduced into the telescopic rod 6 during retraction and affecting the overall accuracy of the hydraulic cylinder.

[0037] Optionally, a stop protrusion 21 is formed on the side of the cylinder sleeve 2 adjacent to the lubricating sleeve 4, and the piston 5 is restrained when it reaches the stop protrusion 21. In actual implementation, the diameter of the stop protrusion 21 is smaller than the diameter of the piston 5, so that the piston 5 is restrained when it reaches the stop protrusion 21.

[0038] Optionally, the lubrication assembly 7 includes an L-shaped adapter 71 fixedly connected to the cylinder base 1, a sliding plug 72 is slidably installed on the inner side wall of the L-shaped adapter 71, and a return spring 73 is fixedly installed between the sliding plug 72 and the L-shaped adapter 71. The lubrication assembly 7 also includes a supply pipe 74 fixedly connected to the side wall of the L-shaped adapter 71, and an inlet check valve 75 and an outlet check valve 76 are detachably connected to the supply pipe 74. One end of the supply pipe 74 is connected to the lubrication sleeve 4, and a sliding plug 2 77 is slidably connected to the inner side wall of the supply pipe 74. Lubricating oil is injected into the supply pipe 74. The inner top wall of the L-shaped adapter 71 is also rotatably connected to a baffle 78, which can push the sliding plug 1 72 to slide when it rotates relative to the L-shaped adapter 71. During the actual implementation process, the liquid inlet connector 8 is installed on the top of the L-shaped adapter 71. When hydraulic oil is injected into the liquid inlet connector 8, the hydraulic oil pushes the baffle 78 to flip, and the baffle pushes the slide 72 to move. When the slide 71 moves toward the telescopic rod 7, air is filled in, and the air pushes the piston 2 77 to move, and the lubricating oil in the supply pipe 74 is injected into the lubrication sleeve 4 through the outlet one-way valve 76, and the telescopic rod 6 is lubricated by the lubrication sleeve 4. When the injection of hydraulic oil stops, the spring 73 pushes the slide 72 to move toward the end away from the telescopic rod 6, and the gas is replenished through the inlet one-way valve 75.

[0039] The above shows and describes the basic principles, main features and advantages of the present invention, and the standard parts used in the present invention can be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology, and the circuit connection adopts the conventional connection method in the existing technology, which will not be described in detail here.

[0040] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention specification and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A self-lubricating hydraulic cylinder, characterized by: The invention comprises a cylinder base (1), a cylinder sleeve (2), a cylinder end cover (3) and a lubricating sleeve (4), wherein the cylinder sleeve (2) is detachably connected to the cylinder base (1), the lubricating sleeve (4) is fixedly connected to one end of the cylinder sleeve (2), and the cylinder end cover (3) is detachably connected to one end of the lubricating sleeve (4) to form a closed structure with the cylinder base (1) and the cylinder sleeve (2), and further comprises: A piston (5) is slidably mounted on the inner wall of the oil cylinder sleeve (2) and is in sliding engagement with the oil cylinder sleeve (2); A telescopic rod (6) is fixedly mounted on one side of the piston (5) and is slidably engaged with the oil cylinder end cover (3); A lubricating assembly (7) connected between the oil cylinder base (1) and the lubricating sleeve (4) for lubricating the telescopic rod (6); A liquid inlet connector (8) is connected to the lubrication assembly (7) and communicates with the oil cylinder base (1); The second liquid inlet connector (9) is connected to the outer wall of the lubricating sleeve (4) and extends to the inner wall of the lubricating sleeve (4) to communicate with the oil cylinder sleeve (2).

2. The self-lubricating hydraulic cylinder according to claim 1, characterized in that: The side walls of the oil cylinder sleeve (2) and the oil cylinder end cover (3) are provided with through holes, and the side walls of the oil cylinder base (1) and the lubricating sleeve (4) are provided with threaded holes. The oil cylinder base (1) and the oil cylinder sleeve (2) as well as the lubricating sleeve (4) and the oil cylinder end cover (3) are detachably connected via bolts.

3. The self-lubricating hydraulic cylinder according to claim 1, characterized in that: The inner wall of the oil cylinder end cover (3) is threadedly connected to a guide sleeve (31), the inner wall of the oil cylinder end cover (3) is also sleeved with a sealing ring (32) near the inner side, and the inner wall of the oil cylinder end cover (3) is also sleeved with a dustproof rubber sleeve (33) near the outer side.

4. The self-lubricating hydraulic cylinder according to claim 1, characterized in that: A side of the oil cylinder sleeve (2) close to the lubricating sleeve (4) extends inward to form a limiting protrusion (21), and the piston (5) is in a limiting state when it moves to the position of the limiting protrusion (21).

5. The self-lubricating hydraulic cylinder according to claim 1, characterized in that: The lubrication assembly (7) includes an L-shaped adapter (71) fixedly connected to the oil cylinder base (1), a first sliding plug (72) is slidably mounted on the inner side wall of the L-shaped adapter (71), and a return spring (73) is fixedly mounted between the first sliding plug (72) and the L-shaped adapter (71). The lubrication assembly (7) also includes a supply pipe (74) fixedly connected to the side wall of the L-shaped adapter (71), an inlet check valve (75) and an outlet check valve (76) are detachably connected to the supply pipe (74), one end of the supply pipe (74) is connected to the lubrication sleeve (4), a second sliding plug (77) is slidably mounted on the inner side wall of the supply pipe (74), and lubricating oil is injected into the supply pipe (74).

6. The self-lubricating hydraulic cylinder according to claim 5, characterized in that: The inner top wall of the L-shaped adapter (71) is also rotatably connected to a baffle (78), and when the baffle (78) rotates relative to the L-shaped adapter (71), it can push the sliding plug (72) to slide.

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