Leak-proof hydraulic oil cylinder

Abstract

The utility model relates to the technical field of hydraulic oil cylinders, in particular to a leakproof hydraulic oil cylinder. According to the technical scheme, the oil cylinder comprises an oil cylinder body, mounting plates are fixedly mounted at the two ends of the oil cylinder body, and a piston is slidably connected into the oil cylinder body; the sealing assembly comprises a telescopic rubber pipe, a sealing rubber sheet and a sealing groove, the telescopic rubber pipe is fixedly installed on a rod body of the hydraulic rod, the sealing rubber sheet is fixedly installed at the end of the telescopic rubber pipe, the sealing groove is formed in the inner wall of the installation plate, and the sealing rubber sheet is embedded into the sealing groove; a flow blocking assembly is arranged on the outer ring of the sealing rubber sheet. Pressure is applied to the sealing rubber sheet through hydraulic pressure inside the oil cylinder body, the sealing rubber sheet is attached to the sealing groove under the action of the hydraulic pressure, the distance between the sealing rubber sheet and the sealing groove is shortened under pressurization of the hydraulic pressure, and the sealing effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic oil cylinders, in particular to an anti-leakage hydraulic oil cylinder. Background Art

[0002] Hydraulic cylinder is a common hydraulic actuator used to convert hydraulic energy into mechanical energy to achieve linear motion or rotational motion. When using hydraulic cylinders, leakage prevention is very important, because leakage will not only cause energy waste and environmental pollution, but also affect the working efficiency and stability of the system. In order to prevent hydraulic cylinder leakage.

[0003] In the prior art, the hydraulic cylinder is fixed on the hydraulic cylinder layer by layer through a plurality of sealing rubber rings, and the gap between the hydraulic rod and the hydraulic cylinder is reduced by the sealing rubber, thereby improving the sealing effect of the hydraulic cylinder.

[0004] However, when this type of hydraulic cylinder is in use, as the hydraulic rod continuously rubs against the sealing rubber ring, the sealing rubber ring wears out, resulting in reduced sealing effect of the hydraulic cylinder and hydraulic oil leakage. Utility Model Content

[0005] The utility model aims to provide an anti-leakage hydraulic oil cylinder in view of the problem that the aging of the sealing rubber ring leads to the leakage of hydraulic oil in the background technology.

[0006] The technical solution of the utility model: a leakage-proof hydraulic cylinder, comprising:

[0007] An oil cylinder body, both ends of which are fixedly mounted with mounting plates, a piston is slidably connected inside the oil cylinder body, and a hydraulic rod is fixedly mounted on the end of the piston;

[0008] The sealing assembly comprises a telescopic rubber tube, a sealing rubber sheet and a sealing groove, wherein the telescopic rubber tube is fixedly installed on the rod body of the hydraulic rod, the sealing rubber sheet is fixedly installed on the end of the telescopic rubber tube, the inner wall of the mounting plate is provided with a sealing groove, and the sealing rubber sheet is embedded in the sealing groove;

[0009] A flow-blocking component is arranged at the outer ring of the sealing rubber sheet, and hydraulic oil is arranged inside the oil cylinder body.

[0010] Optionally, the telescopic rubber tube and the sealing rubber sheet form a trumpet-shaped structure, and a guide opening is opened at the center of the mounting plate to which the hydraulic rod is slidably connected, and the guide opening is located at the center of the trumpet-shaped structure.

[0011] Optionally, the sealing groove adopts an annular concave structure, and the sealing rubber sheet adopts an outwardly convex annular structure, and the shape of the sealing rubber sheet is adapted to that of the sealing groove.

[0012] Optionally, a shielding ring is fixedly installed between the telescopic rubber tube and the hydraulic rod, the telescopic rubber tube has multiple sections, and the inner ring diameter of the telescopic rubber tube is the same as the diameter of the hydraulic rod.

[0013] Optionally, the baffle assembly includes an extended rubber sheet and a buffer groove, the extended rubber sheet is fixedly mounted on the outer arc surface of the sealing rubber sheet, the inner wall of the mounting plate is provided with a buffer groove, and the extended rubber sheet is embedded in the buffer groove of the inner wall of the mounting plate.

[0014] Optionally, a limit block is fixedly installed on the inner wall of the mounting plate and located at the buffer groove, and the extended rubber sheet is clamped with the limit block.

[0015] Optionally, the hydraulic rod passes through a mounting plate located at the top of the cylinder body, a sealing rubber ring is fixedly installed at the mounting plate at the top of the cylinder body, and the rod body of the hydraulic rod is slidably connected to the sealing rubber ring.

[0016] Compared with the prior art, the utility model has the following beneficial technical effects:

[0017] The utility model applies pressure to the sealing rubber sheet through the hydraulic pressure inside the oil cylinder body. Under the action of the hydraulic pressure, the sealing rubber sheet is attached to the sealing groove. Under the pressure of the hydraulic pressure, the distance between the sealing rubber sheet and the sealing groove is reduced, thereby improving the sealing effect.

[0018] Furthermore, even if hydraulic oil seeps into the space between the sealing rubber sheet and the sealing groove, the hydraulic oil there gradually becomes viscous over time, and the hydraulic oil entering into the space between the sealing rubber sheet and the sealing groove is intercepted to prevent leakage of the hydraulic oil.

[0019] Furthermore, by using the extended rubber sheet as an extension of the sealing rubber sheet, the distance from the extended rubber sheet to the sealing rubber sheet and the sealing groove of the hydraulic oil is extended, thereby extending the flow time of the hydraulic oil. When the hydraulic oil squeezes the extended rubber sheet to enter the buffer groove, the flow speed of the hydraulic oil is slowed down again, which allows the hydraulic oil sufficient time to become viscous. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the overall structure of an embodiment of the utility model is given;

[0021] Figure 2 A schematic diagram of a main cross-sectional view of the oil cylinder body structure of an embodiment of the utility model is given;

[0022] Figure 3 for Figure 2 A part of the sealing rubber sheet structure enlarged schematic diagram;

[0023] Figure 4A schematic structural diagram of a telescopic rubber tube according to an embodiment of the utility model is given.

[0024] Figure numerals: 1. Cylinder body; 2. Mounting plate; 3. Sealing rubber ring; 4. Hydraulic rod; 5. Piston; 6. Sealing assembly; 61. Shielding ring; 62. Telescopic rubber tube; 63. Sealing rubber sheet; 64. Sealing groove; 7. Flow blocking assembly; 71. Extended rubber sheet; 72. Buffer groove; 73. Limit block. DETAILED DESCRIPTION

[0025] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all of the embodiments.

[0026] The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0027] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

[0028] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Example 1

[0031] This embodiment provides a leakage-proof hydraulic cylinder, such as Figure 1As shown, it includes a cylinder body 1, both ends of the cylinder body 1 are fixedly installed with mounting plates 2, the cylinder body 1 is fixedly installed on the mechanical equipment through the mounting plate 2, the inside of the cylinder body 1 is slidably connected with a piston 5, and the end of the piston 5 is fixedly installed with a hydraulic rod 4; hydraulic oil is arranged inside the cylinder body 1, and the hydraulic oil in the cylinder body 1 changes the position of the hydraulic rod 4 by squeezing the piston 5.

[0032] The hydraulic rod 4 passes through the mounting plate 2 located at the top of the oil cylinder body 1 . A sealing rubber ring 3 is fixedly installed at the mounting plate 2 at the top of the oil cylinder body 1 . The rod body of the hydraulic rod 4 is slidably connected to the sealing rubber ring 3 .

[0033] like Figure 2 and 3 As shown, a sealing assembly 6 is provided at the rod body of the hydraulic rod 4, and the sealing assembly 6 includes a telescopic rubber tube 62, a sealing rubber sheet 63 and a sealing groove 64. A shielding ring 61 is fixedly installed between the telescopic rubber tube 62 and the sealing rubber ring 3. The telescopic rubber tube 62 and the hydraulic rod 4 are integrally formed through the shielding ring 61, and the shielding ring 61 blocks the connection between the shielding ring 61 and the hydraulic rod 4 to prevent the connection from being affected by the hydraulic pressure and causing hydraulic oil leakage.

[0034] like Figure 3 and 4 As shown, the telescopic rubber tube 62 and the sealing rubber sheet 63 form a trumpet-shaped structure, and a guide opening is opened at the center of the mounting plate 2 to which the hydraulic rod 4 is slidably connected. The guide opening is located at the center of the trumpet-shaped structure, and the guide opening of the mounting plate 2 is wrapped by the telescopic rubber tube 62 and the sealing rubber sheet 63.

[0035] like Figure 4 As shown, the telescopic rubber tube 62 is fixedly installed on the rod body of the hydraulic rod 4, and a sealing rubber sheet 63 is fixedly installed on the end of the telescopic rubber tube 62. A sealing groove 64 is provided on the inner wall of the mounting plate 2, and the sealing rubber sheet 63 is embedded in the sealing groove 64. The sealing rubber sheet 63 is squeezed by hydraulic oil to fit on the mounting plate 2, and the sealing rubber sheet 63 is pressed into the sealing groove 64, thereby improving the sealing effect. The hydraulic oil entering between the sealing rubber sheet 63 and the sealing groove 64 moves slowly toward the guide opening of the mounting plate 2 under the action of pressure.

[0036] Since hydraulic oil leakage is a process, during this process, the hydraulic oil between the sealing rubber sheet 63 and the sealing groove 64 is stored for a long time and does not participate in the flow, that is, it is no longer heated, and due to the heat insulation effect of the sealing rubber sheet 63 itself, the hydraulic oil between the sealing rubber sheet 63 and the sealing groove 64 will become viscous and the fluidity will be reduced. The viscous hydraulic oil will block the hydraulic oil with high fluidity.

[0037] like Figure 3As shown, the sealing groove 64 adopts an annular concave structure, and the sealing rubber sheet 63 adopts an outwardly convex annular structure. The shapes of the sealing rubber sheet 63 and the sealing groove 64 are adapted so that the sealing rubber sheet 63 completely fits the sealing groove 64 to improve the sealing effect.

[0038] A shielding ring 61 is fixedly installed between the telescopic rubber tube 62 and the hydraulic rod 4. The telescopic rubber tube 62 has multiple sections, and the inner diameter of the telescopic rubber tube 62 is the same as the diameter of the hydraulic rod 4. When the hydraulic rod 4 slides upward, the telescopic rubber tube 62 is folded, and the folded telescopic rubber tube 62 is pushed toward the hydraulic rod 4 under the action of the hydraulic oil; when the hydraulic rod 4 slides downward, the telescopic rubber tube 62 is unfolded, and at the same time, it is pushed toward the hydraulic rod 4 under the action of the hydraulic oil, thereby reducing the space occupied by the telescopic rubber tube 62 inside the oil cylinder body 1.

[0039] In this embodiment, the hydraulic pressure inside the cylinder body 1 applies pressure to the sealing rubber sheet 63. Under the action of the hydraulic pressure, the sealing rubber sheet 63 fits in the sealing groove 64. Under the pressure of the hydraulic pressure, the distance between the sealing rubber sheet 63 and the sealing groove 64 is reduced, thereby improving the sealing effect. Even if hydraulic oil penetrates between the sealing rubber sheet 63 and the sealing groove 64, the hydraulic oil there gradually becomes viscous over time, thereby intercepting the hydraulic oil entering between the sealing rubber sheet 63 and the sealing groove 64 to prevent leakage of the hydraulic oil.

[0040] Example 2

[0041] Based on the first embodiment, this embodiment proposes a leakage-proof hydraulic cylinder, such as Figure 3 As shown, a flow blocking component 7 is provided at the outer ring of the sealing rubber sheet 63, and the flow blocking component 7 includes an extended rubber sheet 71 and a buffer groove 72. The extended rubber sheet 71 is fixedly mounted on the outer arc surface of the sealing rubber sheet 63, and the inner wall of the mounting plate 2 is provided with a buffer groove 72. The extended rubber sheet 71 is embedded in the buffer groove 72 of the inner wall of the mounting plate 2. The extended rubber sheet 71 is used as an extension to extend the distance between the hydraulic oil flowing from the extended rubber sheet 71 to the sealing rubber sheet 63 and the sealing groove 64. The hydraulic oil squeezes the extended rubber sheet 71 to enter the buffer groove 72.

[0042] like Figure 3 As shown, a limit block 73 is fixedly installed on the inner wall of the mounting plate 2 and located at the buffer groove 72, and the extended rubber sheet 71 is clamped with the limit block 73. The extended rubber sheet 71 is limited by the limit block 73 to prevent the extended rubber sheet 71 from being pulled out of the buffer groove 72 when the hydraulic rod 4 moves downward.

[0043] In this embodiment, the extended rubber sheet 71 is used as an extension of the sealing rubber sheet 63, and the distance from the extended rubber sheet 71 to the sealing rubber sheet 63 and the sealing groove 64 of the hydraulic oil is extended, thereby extending the flow time of the hydraulic oil. When the hydraulic oil squeezes the extended rubber sheet 71 to enter the buffer groove 72, the flow speed of the hydraulic oil is slowed down again, which allows the hydraulic oil sufficient time to become viscous.

[0044] The above-mentioned specific embodiments are only several optional embodiments of the present invention. Based on the technical solution of the present invention and the relevant inspiration of the above-mentioned embodiments, those skilled in the art can make various alternative improvements and combinations to the above-mentioned specific embodiments.

Claims

1. A leak-proof hydraulic cylinder, characterized in that: include: A cylinder body (1), both ends of which are fixedly mounted with mounting plates (2), a piston (5) is slidably connected inside the cylinder body (1), and a hydraulic rod (4) is fixedly mounted on the end of the piston (5); The sealing assembly (6) comprises a telescopic rubber tube (62), a sealing rubber sheet (63) and a sealing groove (64); the telescopic rubber tube (62) is fixedly mounted on the rod body of the hydraulic rod (4); the sealing rubber sheet (63) is fixedly mounted on the end of the telescopic rubber tube (62); the sealing groove (64) is provided on the inner wall of the mounting plate (2); and the sealing rubber sheet (63) is embedded in the sealing groove (64); A flow-blocking component (7) is arranged at the outer ring of the sealing rubber sheet (63), and hydraulic oil is arranged inside the oil cylinder body (1).

2. The anti-leakage hydraulic cylinder according to claim 1, characterized in that: The telescopic rubber tube (62) and the sealing rubber sheet (63) form a trumpet-shaped structure. A guide opening is provided at the center of the mounting plate (2) to which the hydraulic rod (4) is slidably connected. The guide opening is located at the center of the trumpet-shaped structure.

3. The anti-leakage hydraulic cylinder according to claim 1, characterized in that: The sealing groove (64) has an annular concave structure, and the sealing rubber sheet (63) has an outwardly convex annular structure. The shape of the sealing rubber sheet (63) is adapted to that of the sealing groove (64).

4. The anti-leakage hydraulic cylinder according to claim 1, characterized in that: A shielding ring (61) is fixedly installed between the telescopic rubber tube (62) and the hydraulic rod (4); the telescopic rubber tube (62) has multiple sections; and the inner ring diameter of the telescopic rubber tube (62) is the same as the diameter of the hydraulic rod (4).

5. The anti-leakage hydraulic cylinder according to claim 1, characterized in that: The flow-blocking assembly (7) comprises an extended rubber sheet (71) and a buffer groove (72); the extended rubber sheet (71) is fixedly mounted on the outer arc surface of the sealing rubber sheet (63); the inner wall of the mounting plate (2) is provided with a buffer groove (72); and the extended rubber sheet (71) is embedded in the buffer groove (72) on the inner wall of the mounting plate (2).

6. The anti-leakage hydraulic cylinder according to claim 5, characterized in that: A limit block (73) is fixedly mounted on the inner wall of the mounting plate (2) and located at the buffer groove (72), and the extended rubber sheet (71) is clamped with the limit block (73).

7. The anti-leakage hydraulic cylinder according to claim 1, characterized in that: The hydraulic rod (4) passes through a mounting plate (2) located at the top of the oil cylinder body (1); a sealing rubber ring (3) is fixedly mounted on the mounting plate (2) at the top of the oil cylinder body (1); and the rod body of the hydraulic rod (4) is slidably connected to the sealing rubber ring (3).

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