CN216789229U

CN216789229U - Steel wire retainer ring and hydraulic oil cylinder using same

Info

Publication number: CN216789229U
Application number: CN202220481977.XU
Authority: CN
Inventors: 吕阁
Original assignee: Kunshan Liuge Information Technology Co ltd
Current assignee: Kunshan Liuge Information Technology Co ltd
Priority date: 2022-03-08
Filing date: 2022-03-08
Publication date: 2022-06-21
Anticipated expiration: 2032-03-08

Abstract

The utility model discloses a steel wire retainer ring and a hydraulic oil cylinder applying the retainer ring, which comprise an annular retainer ring body, wherein the annular retainer ring body is provided with a fracture opening, the fracture opening is in an open state when the annular retainer ring body is in an initial state, and is in a closed state when the annular retainer ring body is stressed in a radial direction; the fracture opening of the annular retainer ring body is provided with two end faces which are close to each other in the opposite direction and are mutually centrosymmetric in structure, and an opening gap is formed between the two end faces when the annular retainer ring body is in an initial state. The steel wire retainer ring with the special design can realize self-locking sealing of the steel wire retainer ring without additionally increasing an oil cylinder sealing structure, thereby realizing the requirement of blocking external dirt from entering an internal structure through the retainer ring.

Description

Steel wire retainer ring and hydraulic oil cylinder using same

Technical Field

The utility model relates to the technical field of daily tool parts, in particular to a steel wire check ring and a hydraulic oil cylinder applying the check ring.

Background

The existing hydraulic oil cylinder end cover fixing structure has multiple designs, wherein one common design is that a clamp spring structure is adopted for fixing, and the inner side of the clamp spring is a static sealing ring of an oil cylinder. The static sealing ring is used for sealing hydraulic oil of the oil cylinder and ensuring the normal work of the oil cylinder.

The normal work of static sealing washer needs relatively clear environment, and hydraulic cylinder's operational environment is often comparatively abominable, and external dirt such as mud once contact static sealing washer, can greatly reduced sealing washer's working life, lead to the hydro-cylinder inefficacy.

However, the prior steel wire retainer rings for holes have an opening for installation after the diameter is reduced, because of the installation requirement. The presence of this opening results in external contamination being able to reach the static seal through the retaining ring. The current industry solution is to design additional sealing structures to block outside contamination.

SUMMERY OF THE UTILITY MODEL

The utility model solves the technical problem that the existing steel wire check ring is provided with an opening after being installed, so that external dirt can easily penetrate through the check ring to contact with a static seal ring.

In order to solve the technical problem, the technical scheme of the utility model provides a steel wire retainer ring, which comprises an annular retainer ring body, wherein the annular retainer ring body is provided with a fracture opening, the fracture opening is in an open state when the annular retainer ring body is in an initial state, and is in a closed state when the annular retainer ring body is stressed in a radial direction; the fracture opening of the annular retainer ring body is provided with two end faces which are close to each other in the opposite direction and are mutually centrosymmetric in structure, and an opening gap is formed between the two end faces when the annular retainer ring body is in an initial state.

Optionally, the fracture is in a slanted configuration.

Optionally, the fracture is in a vertical configuration.

Optionally, the two end faces are planar faces with complementary structures.

Optionally, the end faces are non-planar with complementary structures.

Optionally, the two end faces are a step face, a wavy face and a sawtooth face with complementary structures.

In order to solve the technical problem, the technical scheme of the utility model further provides a hydraulic cylinder, which comprises a cylinder barrel and an end cover arranged in the cylinder barrel, wherein the end cover is sleeved on a piston rod, a sealing ring is arranged between the piston rod and the end cover, a static sealing ring is arranged between the end cover and the cylinder barrel, and the steel wire check ring is arranged on one side of the static sealing ring and is arranged between the end cover and the cylinder barrel.

The technical scheme of the utility model has the beneficial effects that:

the steel wire retainer ring with the special design can realize self-locking sealing of the steel wire retainer ring without additionally increasing an oil cylinder sealing structure, thereby realizing the requirement of blocking external dirt from entering an internal structure through the retainer ring.

Drawings

FIG. 1 is a schematic structural diagram of a steel wire retainer ring in a hydraulic oil cylinder in the prior art;

FIG. 2 is a schematic structural diagram of a steel wire retainer ring in the prior art;

FIG. 3 is a schematic structural diagram of a steel wire retainer ring in the embodiment of the present invention;

FIG. 4 is a schematic structural diagram of the steel wire retainer ring after being stressed in the embodiment of the utility model;

fig. 5 is a side view of the steel wire retainer ring after being stressed in the embodiment of the utility model.

The specific implementation mode is as follows:

the utility model is further described with reference to the following drawings and specific examples, which are not intended to be limiting.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; 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 by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.

As shown in fig. 1 and 2, a hydraulic cylinder comprises a cylinder barrel 1 and an end cover 3 arranged in the cylinder barrel 1, wherein the end cover 3 is sleeved on a piston rod 2, a sealing ring 6 is arranged between the piston rod 2 and the end cover 3, and a static sealing ring 5 is arranged between the end cover 3 and the cylinder barrel 1, wherein a steel wire check ring 7 positioned on one side of the static sealing ring 5 is further arranged between the end cover 3 and the cylinder barrel 1, the steel wire check ring 7 is provided with an opening 71, and the existence of the opening 71 causes external dirt to pass through the steel wire check ring 7 to contact the static sealing ring 5, so that the service life of the sealing ring is finally greatly reduced, and even the cylinder is caused to fail. The existing oil cylinder structure design has no similar scheme, and an additional sealing structure is required to be designed for prolonging the service life of the static sealing ring of the oil cylinder, so that the product cost and the assembly process are increased.

Therefore, the present embodiment provides a steel wire retainer ring with a novel structure, please refer to fig. 3 and fig. 4, which includes an annular retainer ring body 9, wherein the annular retainer ring body 9 has a fracture opening 91, the fracture opening 91 is in an open state when the annular retainer ring body 9 is in an initial state, and is in a closed state when the annular retainer ring body 9 is subjected to a radial pressure; the fracture opening 91 of the annular retainer body 9 is represented by two

end faces

911, 912 of the annular retainer body that are close in opposite directions and are configured to be symmetrical with each other, and the two end faces 911, 912 are separated and form an opening gap (as shown in fig. 3, not numbered) when the annular retainer body 9 is in the initial state.

In this embodiment, the fracture 91 has an inclined structure or a vertical structure.

In this embodiment, the two end faces 911 and 912 are planar or non-planar with complementary structures.

In this embodiment, when the two

end surfaces

911 and 912 are plane surfaces or non-plane surfaces with complementary structures, the two end surfaces may be step surfaces, wave surfaces, sawtooth surfaces with complementary structures, or any other pairing structure that can be complementary and completely closed when being stressed radially.

The embodiment also provides a hydraulic cylinder, which comprises a cylinder barrel and an end cover arranged in the cylinder barrel, wherein the end cover is sleeved on the piston rod, a sealing ring is arranged between the piston rod and the end cover, a static sealing ring is arranged between the end cover and the cylinder barrel, and the steel wire check ring which is positioned on one side of the static sealing ring is arranged between the end cover and the cylinder barrel. The steel wire retainer ring with the special design can realize self-locking sealing of the steel wire retainer ring, and an oil cylinder sealing structure is not required to be additionally added, so that the requirement that external dirt is blocked to penetrate through the retainer ring to enter an internal structure is met.

The structure of this embodiment starts from the design of the fracture opening 91 of the steel wire retainer ring 9, and compared with the national standard design, the design of the opening is redesigned, and the opening is designed as a wedge-shaped opening (as shown in fig. 3), and the opening gap is shown in fig. 3. The pressing force of the assembled product is utilized to ensure that the opening is closed, namely the requirement of assembly is met and the aim of sealing is fulfilled. After assembly, the steel wire retainer ring is compressed by the diameter of the clamp spring groove 8 to realize self sealing (as shown in fig. 4 and 5), the clamp spring groove 8 (as shown in fig. 1) is formed in the position where the steel wire retainer ring 9 is installed on the cylinder barrel 1, when the steel wire retainer ring 9 is installed in place, the diameter of the clamp spring groove 8 is equal to or slightly smaller than the diameter of the steel wire retainer ring 9 after being closed, and the clamp spring groove 8 completely compresses and closes the fracture opening 91 of the steel wire retainer ring 9 to realize complete isolation and sealing of external stains.

The structural design of the steel wire check ring of this embodiment replaces prior art's uncovered design with wedge opening design, has guaranteed the installability promptly, can realize sealed purpose again. And the oil cylinder does not need to be provided with an additional sealing structure, and the sealing requirement can be realized on the original structure by improving the designed steel wire retainer ring, so that the product cost is saved.

In conclusion, the self-locking oil cylinder has the advantages that the structure is simple, the installation is convenient, the self-locking sealing of the steel wire retainer ring can be realized by adopting the specially designed steel wire retainer ring, and the additional arrangement of an oil cylinder sealing structure is not needed, so that the requirement that external dirt is prevented from passing through the retainer ring and entering the internal structure is met.

While the utility model has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the utility model.

Claims

1. The steel wire retainer ring is characterized by comprising an annular retainer ring body, wherein the annular retainer ring body is provided with a fracture opening, the fracture opening is in an open state when the annular retainer ring body is in an initial state, and is in a closed state when the annular retainer ring body is stressed in a radial direction; the fracture opening of the annular retainer ring body is provided with two end faces which are close to each other in the opposite direction and are mutually centrosymmetric in structure, and an opening gap is formed between the two end faces when the annular retainer ring body is in an initial state.

2. The wire retainer ring of claim 1, wherein the fracture opening is in an inclined configuration.

3. The wire retainer ring of claim 1, wherein said fracture opening is in a vertical configuration.

4. The wire retainer ring of claim 1, wherein said end surfaces are complementarily configured flat surfaces.

5. The wire retainer ring of claim 1, wherein said end faces are non-planar and have complementary configurations.

6. The wire retainer ring of claim 5, wherein said end faces are complementary stepped, undulating, or serrated.

7. A hydraulic cylinder comprises a cylinder barrel and an end cover arranged in the cylinder barrel, wherein the end cover is sleeved on a piston rod, a sealing ring is arranged between the piston rod and the end cover, and a static sealing ring is arranged between the end cover and the cylinder barrel, and the hydraulic cylinder is characterized in that the steel wire retainer ring which is positioned on one side of the static sealing ring and is in any one of claims 1 to 6 is further arranged between the end cover and the cylinder barrel.