CN216077787U

CN216077787U - Anti-leakage oil cylinder

Info

Publication number: CN216077787U
Application number: CN202122338101.8U
Authority: CN
Inventors: 姜伟; 姜渊; 马海舟; 杨华进; 李鹏飞; 方思令
Original assignee: Zhejiang Shengbang Intelligent Equipment Co ltd; Zhejiang Sunbun Technology Co Ltd; Sunbun Group Co Ltd
Current assignee: Zhejiang Shengbang Intelligent Equipment Co ltd; Zhejiang Sunbun Technology Co Ltd; Sunbun Group Co Ltd
Priority date: 2021-09-26
Filing date: 2021-09-26
Publication date: 2022-03-18
Anticipated expiration: 2031-09-26

Abstract

An anti-leakage oil cylinder. The problem of current hydro-cylinder seal structure sealed insecure is solved. The piston separates the space in the cylinder body into a rod cavity and a rodless cavity, one end of the piston rod is connected with the piston, the other end of the piston rod penetrates through the rod cavity, a sealing structure used for sealing the rod cavity is arranged on the cylinder body, and the sealing structure comprises a sealing ring and an oil drainage port used for collecting leakage pressure oil. The oil drain port is arranged, so that a small amount of pressure oil can be drained reliably from the oil drain port, the oil cylinder cannot leak oil, the environment cannot be polluted, and meanwhile, the service life of the sealing ring is longer.

Description

Anti-leakage oil cylinder

Technical Field

The utility model relates to an oil cylinder, in particular to an anti-leakage oil cylinder.

Background

The oil cylinder is a hydraulic actuating element for converting hydraulic energy into mechanical energy and can drive an object to realize linear reciprocating motion. It has simple structure and reliable operation. When it is used to implement reciprocating motion, it can omit speed-reducing device, and has no transmission gap, and its motion is stable, so that it can be extensively used in various mechanical hydraulic systems. The cylinder basically comprises a cylinder barrel, a cylinder cover, a piston rod and a sealing structure.

The anti-leakage oil cylinder sealing structure mainly means that the sealing part of the front cylinder cover and the piston rod is easy to leak, when the oil cylinder moves repeatedly under the action of high-pressure oil, a small amount of oil can leak to the oil cylinder, and therefore the sealing structure is required to be arranged at the position to avoid the oil cylinder leakage. The oil cylinder sealing structure in the current market is arranged according to a wear-resistant ring and then a U-shaped ring. In a theoretical condition, when oil enters a rod cavity, high-pressure oil extrudes the U-shaped ring through the wear-resisting ring to be in a sealing state; in fact, when the oil acting force of the rodless cavity is released quickly, high-pressure oil originally entering between the wear-resisting ring and the U-shaped ring flows in from the oblique notch due to the fact that the movable gap between the wear-resisting ring and the piston rod is small, the high-pressure oil is sprayed out from the oblique notch just after entering the wear-resisting ring, the periphery of the U-shaped ring is stressed asymmetrically, even stress is achieved after the oil is filled in the sealing surface of the U-shaped ring groove, and the stress is asynchronous. Wear-resisting ring scarf effect is the passageway of business turn over oil, it is fixed to be convenient for the installation when the installation simultaneously, and the setting of U type circle is sealed tighter more reliable when the high pressure, sealed effect is not good on the contrary during relative low pressure, and in the actual production process, the oil pressure is along with system's operating mode change at any time, and the pressure oil of wear-resisting ring department scarf also makes U type circle warp very easily, U type circle seal structure warp the back when hydro-cylinder reciprocating motion, fluid will leak to the opposite side, when the volume of fluid accumulates to enough much, fluid will follow dust ring department and explode. This structure has the following problems in use: 1. customers generally reflect that the oil sealing effect is poor; 2. the leakage of oil causes environmental pollution; 3. the number of times of machine maintenance is increased, and the maintenance is troublesome.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that the sealing of the existing oil cylinder sealing structure in the background art is unreliable, the utility model provides an anti-leakage oil cylinder.

The technical scheme of the utility model is as follows: the utility model provides an antiseep hydro-cylinder, includes cylinder body, piston and piston rod, the piston with the space separation in the cylinder body for there being the pole chamber and no pole chamber, piston rod one end be connected with the piston, the other end passes there is the pole chamber to set up, the cylinder body on be equipped with and be used for sealed seal structure who has the pole chamber, seal structure include the sealing washer and be used for collecting the draining mouth of seepage pressure oil.

As a further improvement of the utility model, the sealing structure comprises a cylinder cover, a wear-resisting ring is arranged on the cylinder cover, the wear-resisting ring and the sealing ring are sleeved outside the piston rod, and the oil drainage port is arranged on the cylinder cover.

As a further improvement of the utility model, the oil drainage port comprises an annular groove and a connecting hole communicated with the oil tank, and the annular groove is arranged on the outer side of the circumference of the piston rod.

As a further improvement of the utility model, the connecting hole is a threaded hole.

As a further improvement of the utility model, the connecting hole is provided with a connecting pipe used for being connected with the oil tank.

As a further improvement of the utility model, the oil drain port is arranged behind the sealing ring in the extending direction of the piston rod.

As a further improvement of the utility model, the sealing ring, the wear-resistant ring and the oil drain port are sequentially arranged along the extending direction of the piston rod.

As a further improvement of the utility model, the wear-resistant ring, the sealing ring and the oil drain port are sequentially arranged along the extending direction of the piston rod.

As a further improvement of the utility model, a dustproof ring is arranged at the rear part of the oil drain opening in the extending direction of the piston rod.

As a further improvement of the utility model, the wear-resistant ring is provided with a notch, the sealing ring is arranged in a U shape, and the opening of the U-shaped sealing ring faces the rod cavity.

The oil drain port is arranged, so that a small amount of pressure oil can be drained reliably from the oil drain port, the oil cylinder cannot leak oil, the environment cannot be polluted, and meanwhile, the service life of the sealing ring is longer.

Drawings

Fig. 1 is a schematic structural diagram of a first embodiment of the present invention.

Fig. 2 is an enlarged schematic view of the structure at I in fig. 1.

Fig. 3 is a schematic structural view of a seal structure 4 according to a second embodiment of the present invention.

Fig. 4 is a schematic structural diagram of the sealing ring 5 in fig. 2.

Fig. 5 is a schematic structural view of the wear-resistant ring 8 in fig. 2.

Fig. 6 is a schematic structural diagram of the dust ring 9 in fig. 2.

In the figure, 1, a cylinder body; 11. a rod cavity; 12. a rodless cavity; 2. a piston; 3. a piston rod; 4. a sealing structure; 5. a seal ring; 6. an oil drainage port; 61. an annular groove; 62. connecting holes; 63. a connecting pipe; 7. a cylinder cover; 8. a wear ring; 81. cutting; 9. a dust ring.

Detailed Description

The embodiments of the utility model will be further described with reference to the accompanying drawings in which:

as shown in fig. 1 and fig. 2-6, the anti-leakage oil cylinder comprises a cylinder body 1, a piston 2 and a piston rod 3, wherein the piston 2 divides the space in the cylinder body 1 into a rod cavity 11 and a rodless cavity 12, one end of the piston rod 3 is connected with the piston 2, the other end of the piston rod passes through the rod cavity 11, a sealing structure 4 for sealing the rod cavity 11 is arranged on the cylinder body 1, and the sealing structure 4 comprises a sealing ring 5 and an oil drainage port 6 for collecting leakage pressure oil. The oil drain port is arranged, so that a small amount of pressure oil can be drained reliably from the oil drain port, the oil cylinder cannot leak oil, the environment cannot be polluted, and meanwhile, the service life of the sealing ring is longer. When oil leaks to the middle parts of the wear-resistant ring and the dust ring from the sealing ring, the leaked oil can flow into the annular groove in the cylinder cover, the bottom of the annular groove is provided with a small hole (connecting hole), the connecting hole is connected with the oil tank through a small rubber tube (connecting tube) outside, the leaked oil flows into the oil tank from the small hole, the oil cannot leak from the dust ring, and the cleanliness of the outer surface of the piston rod is protected. The utility model has the advantages of simple structure, reasonable sealing structure layout, no environmental pollution caused by oil leakage, long service life of the sealing ring and the like.

Seal structure 4 include cylinder cap 7, cylinder cap 7 on be equipped with wear-resisting ring 8, wear-resisting ring 8 and sealing washer 5 all overlap and locate outside piston rod 3, draining port 6 locate on cylinder cap 7. The structure ensures that the product has good integrity and is convenient to assemble.

The oil drainage port 6 comprises an annular groove 61 and a connecting hole 62 communicated with the oil tank, and the annular groove 61 is arranged on the outer side of the circumference of the piston rod 3. Specifically, the connecting hole 62 is a threaded hole. The threaded hole is convenient to connect with the connecting pipe, the structure is simple, and the connection is convenient and reliable. More specifically, the connection hole 62 is provided with a connection pipe 63 for connecting with a fuel tank. Therefore, a small amount of leaked oil can be discharged to the oil tank through the annular groove, the connecting hole and the connecting pipe, the oil is prevented from being accumulated and polluting the valve rod, and the oil is prevented from polluting a machine from a leakage position of the dust ring.

The oil drain opening 6 is arranged behind the sealing ring 5 in the extending direction of the piston rod 3. Specifically, the wear-resistant ring 8 is provided with a notch 81, the sealing ring 5 is arranged in a U shape, and an opening of the U-shaped sealing ring 5 faces the rod cavity 11. More specifically, the oil drain opening 6 is provided with a dust ring 9 at the rear in the extending direction of the piston rod 3. In the first embodiment, the seal ring 5, the wear-resistant ring 8 and the oil drain opening 6 are sequentially arranged along the extending direction of the piston rod 3. Namely, the oil drain opening 6 is arranged between the wear-resisting ring 8 and the dust ring. Such benefit lies in that the sealing washer design is at the most pressure end (being closest to there being the pole chamber department), such range project organization, the fluid effort of being convenient for is even effect in the sealed face department of sealing washer, consequently the atress is even, the life of extension sealing washer, in reciprocal extrusion and quick release, avoid fluid seepage to the other end, even there is fluid seepage to the other end, it also is acting on wear-resisting ring for the lubrication on the wear-resisting ring, there is this fluid of seepage to also can flow to the oil tank through the draining port by unnecessary hydraulic pressure again and go. The wear-resistant ring is made of wear-resistant resin material and plays a role in lubrication and guidance, the outline structure is a belt-shaped structure, a notch (usually obliquely arranged) with a specified width is formed in the middle of the belt-shaped structure, and the oblique notch is used as a channel for oil inlet and outlet. The structure has the advantages of reasonable layout, no environmental pollution caused by oil leakage, long service life of the sealing ring and the like, and in the actual use process, the groove of the U-shaped sealing ring can contain high-pressure oil and can also play a role in supplementing oil when the rod cavity is low-pressure, thereby being a preferred mode of the utility model. In the second embodiment, the wear-resistant ring 8, the seal ring 5 and the oil drain opening 6 are sequentially arranged along the extending direction of the piston rod 3. The oil drain port is arranged between the sealing ring and the dust ring, when the oil cylinder reciprocates (a piston rod reciprocates), the sealing structure of the U-shaped sealing ring deforms, oil liquid leaks to the other side and is finally discharged from the oil drain port, and the oil liquid cannot leak to a machine through the dust ring to pollute the environment.

In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

The skilled person should understand that: although the present invention has been described in terms of the above embodiments, the inventive concepts are not limited to the embodiments, and any modifications that utilize the inventive concepts are intended to be included within the scope of the appended claims.

Claims

1. An anti-leakage oil cylinder comprises a cylinder body (1), a piston (2) and a piston rod (3), and is characterized in that the piston (2) divides the space in the cylinder body (1) into a rod cavity (11) and a rodless cavity (12), one end of the piston rod (3) is connected with the piston (2), the other end of the piston rod penetrates through the rod cavity (11), a sealing structure (4) used for sealing the rod cavity (11) is arranged on the cylinder body (1), and the sealing structure (4) comprises a sealing ring (5) and an oil drainage port (6) used for collecting leakage pressure oil.

2. The anti-leakage oil cylinder according to claim 1, wherein the sealing structure (4) comprises a cylinder cover (7), the cylinder cover (7) is provided with a wear-resistant ring (8), the wear-resistant ring (8) and the sealing ring (5) are both sleeved outside the piston rod (3), and the oil drainage port (6) is arranged on the cylinder cover (7).

3. The anti-leakage oil cylinder according to claim 1, wherein the oil drainage port (6) comprises an annular groove (61) and a connecting hole (62) communicated with the oil tank, and the annular groove (61) is arranged on the outer side of the circumference of the piston rod (3).

4. The anti-leakage oil cylinder according to claim 3, characterized in that the connecting hole (62) is a threaded hole.

5. The anti-leakage oil cylinder according to claim 3, wherein the connecting hole (62) is provided with a connecting pipe (63) for connecting with an oil tank.

6. The anti-leakage oil cylinder according to claim 2, wherein the oil drain port (6) is arranged behind the sealing ring (5) in the extending direction of the piston rod (3).

7. The anti-leakage oil cylinder according to claim 2, wherein the seal ring (5), the wear-resistant ring (8) and the oil drain port (6) are sequentially arranged along the extending direction of the piston rod (3).

8. The anti-leakage oil cylinder according to claim 2, wherein the wear-resistant ring (8), the sealing ring (5) and the oil drain port (6) are sequentially arranged along the extending direction of the piston rod (3).

9. The anti-leakage oil cylinder according to claim 7 or 8, characterized in that a dust ring (9) is arranged behind the oil drain opening (6) in the extending direction of the piston rod (3).

10. The oil cylinder with the anti-leakage function as claimed in claim 2, wherein the wear-resistant ring (8) is provided with a notch (81), the sealing ring (5) is U-shaped, and the opening of the U-shaped sealing ring (5) faces the rod cavity (11).